Bidirectional excess pressure adjusting device for tunnel

Abstract

The utility model discloses a bi-directional excess pressure adjusting device for tunnel in the technical field of excess pressure valves, which comprises a fixing frame, an excess pressure valve frame, a fire damper and a counterweight lever, a plurality of counterweight-adjustable valve plates which are closed by gravity in a self-drooping manner are mounted in the excess pressure valve frame, and different self-drooping valve plates can be opened towards the left side and the right side respectively, so that the excess pressure valve frame can be ventilated bi-directionally, and the excess pressure valve frame can be opened towards the left side and the right side respectively. The purpose of bidirectional pressure relief is achieved; when the pressure difference between the spaces on the two sides is smaller than the minimum opening pressure difference, the self-drooping valve plate can be drooped and closed, two-way air closing is carried out, and the effect of maintaining space static pressure is achieved; the device is simple in structure, capable of completing bidirectional excess pressure control and pressure relief and convenient to install, meanwhile, a balance weight device is additionally arranged, the working air pressure of a valve block in the excess pressure valve can be conveniently adjusted by increasing and decreasing balance weights, a fireproof valve and a ventilation shutter are additionally arranged, the whole device integrates the fireproof, pressure stabilizing and air closing functions, the whole structure is integrated, and the cost is reduced. Multiple functions can be achieved through one-time installation.

Description

Technical Field

[0001] This utility model relates to the field of residual pressure control technology, and in particular to a bidirectional residual pressure regulating device for tunnels. Background Technology

[0002] A pressure relief valve is a device designed to maintain a certain indoor static pressure and achieve energy-free automatic control of a room or environment to keep it at a positive pressure. Pressure relief valves are mostly used in cleanroom air conditioning systems and in situations with special positive or negative air pressure requirements.

[0003] It is typically installed on the partition wall between two spaces that need to maintain a pressure difference. The valve opens when the set pressure difference is reached by adjusting the counterweight or setting a preset pressure difference, and fully opens when the pressure difference is at its maximum. After a certain amount of air is expelled, the pressure is balanced, and it closes automatically when the pressure difference drops to its minimum.

[0004] In a twin-tunnel, single-direction tunnel, multiple pedestrian escape passages are constructed between tunnels A and B for evacuation purposes. These passages are separated by fire doors (C). In the event of a fire in tunnel A, people can escape to tunnel B via the nearest pedestrian passage. To prevent smoke from following people through the fire doors into unburned tunnels, the escape tunnel must maintain positive pressure to prevent smoke from following. However, the pressure difference between the two sides of the fire doors should not be too high, generally 20-30 Pa. Overpressure may prevent the fire doors (C) from opening, hindering evacuation. Conversely, if a fire breaks out on the other side, people can escape in the opposite direction. Tunnels A and B serve as mutual escape exits. Figure 8 As shown. The tunnel is a two-way escape route, so the fireproof partitions should have two-way pressure relief. Since it is necessary to cross the fireproof partitions, fireproof functions are required.

[0005] The current pressure relief valve is a one-way opening airflow regulating device, adjusting its opening degree according to the static pressure difference and using the position of a counterweight to balance the air pressure. The airflow through the pressure relief valve is generally between 100-1200 m³ / h, maintaining a pressure difference between 5-40 Pa. When installed alone, it cannot simultaneously meet the smoke prevention requirements of the aforementioned two-way evacuation tunnel cross passages.

[0006] Based on this, this utility model designs a bidirectional residual pressure regulating device for tunnels to solve the above problems. Utility Model Content

[0007] The purpose of this utility model is to provide a bidirectional overpressure regulating device for tunnels. This device can release pressure in both directions to achieve the purpose of preventing overpressure in both directions; at the same time, it can also seal air in both directions to achieve the purpose of maintaining pressure in both directions. This device can achieve bidirectional overpressure balance with a simplified structure. The overpressure valve of this device is easy to use, has a simple structure, and is easy to install. It also adds a counterweight device to easily adjust the working air pressure of the self-closing valve plate in the overpressure valve. The adjustment method is also very simple, just add a counterweight nut. This device also adds a fire damper and ventilation louvers, so that the whole device integrates fire prevention, pressure stabilization and air sealing functions into a whole structure. Multiple functions can be achieved with one installation, and the various functional components do not interfere with each other.

[0008] This utility model is implemented as follows: A bidirectional overpressure regulating device for tunnels, comprising:

[0009] Fixed frame, pressure relief valve frame, fire damper and counterweight bar;

[0010] The fixing frame is a square tube structure with openings at both ends. The fixing frame is fixedly embedded in the wall and penetrates both sides of the wall.

[0011] A ventilation louver is provided on each of the openings at both ends of the fixing frame, and the ventilation louver completely covers and blocks the opening of the fixing frame;

[0012] The mounting frame is also equipped with a fire damper and a pressure relief valve frame.

[0013] Both the fire damper and the pressure relief valve frame are rectangular structures. The fire damper and the pressure relief valve frame do not contact each other and are arranged parallel to each other.

[0014] Both the fire damper and the pressure relief valve frame are completely covered and blocked within the inner cavity of the fixed frame;

[0015] The pressure relief valve frame is a hollow square frame with openings at both the left and right ends. Multiple rotating shafts are horizontally arranged inside the pressure relief valve frame, and each rotating shaft is evenly spaced at the same height in the same vertical plane.

[0016] A self-closing valve is rotatably mounted on each of the aforementioned shafts. The self-closing valve can swing open in the left-right direction and rests between two adjacent shafts; and the two adjacent self-closing valves open in opposite directions.

[0017] The self-closing valve plate is also equipped with multiple counterweight rods.

[0018] Furthermore, the fixing frame 1 is a fixing frame made of aluminum alloy, and the inner wall of the ventilation louver is also covered with a sealing gasket, which is a rubber gasket.

[0019] The ventilation louvers are waterproof louvers.

[0020] Furthermore, the self-closing valve plate is rotatably suspended on a horizontal rotating shaft via a bearing;

[0021] The self-closing valve plate is an aluminum alloy baffle; the pressure relief valve frame is an aluminum alloy square frame.

[0022] Furthermore, an arc-shaped sealing strip is provided on the lower edge of the self-closing valve plate. The arc-shaped groove of the sealing strip fits and seals with the rotating shaft, and each rotating shaft blocks the rotation path of the self-closing valve plate above it.

[0023] The two adjacent self-closing valve plates are located on opposite sides of the plane of the rotating shaft.

[0024] Furthermore, the counterweight rod is a screw rod, and the counterweight rod is locked onto the self-draining valve plate by a thread;

[0025] The multiple counterweight rods on the self-closing valve plate are evenly distributed in the horizontal direction;

[0026] The counterweight rod is also locked with a counterweight nut.

[0027] The beneficial effects of this utility model are: 1. This utility model integrates fire prevention, ventilation, air tightness and pressure stabilization into the same ventilation frame, so that after the device is installed on the wall, there is no need for multiple openings. It can be installed in one go, with integrated functions, reducing the amount of construction work and reducing damage to the wall, and effectively preserving the structural strength of the wall.

[0028] 2. The pressure relief valve frame of this device is an integral structure, which is convenient to manufacture and replace. In addition, the self-closing valve plate of this device can be flipped, and self-closing valve plates are set on both sides, so that the pressure relief valve of this device can be vented in both directions and closed in both directions, making it more convenient to use. It is suitable for specific environments that require bidirectional static pressure. At the same time, the self-closing valve plate of this device is also equipped with a counterweight rod and a counterweight nut, which makes it easy to adjust the air pressure. No other structure is needed. Instead, the opening or closing pressure is automatically controlled by gravity, which can be easily adjusted to meet various environmental requirements.

[0029] 3. This device also integrates ventilation louvers, which can effectively prevent insects, rodents and debris from entering the fixed frame, and effectively protect the internal pressure relief valve and fire damper from external damage. Attached Figure Description

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Figure 1 This is a schematic diagram of the internal side structure of this utility model;

[0032] Figure 2 This is a schematic diagram of the front structure of the ventilation louvers of this utility model;

[0033] Figure 3 This is a side view of the residual pressure valve of this utility model in the state of venting to the right;

[0034] Figure 4 This is a side view of the residual pressure valve of this utility model in the state of venting to the left;

[0035] Figure 5 This is a schematic diagram of the structure of the present invention, showing that both adjacent self-closing valve plates are in a closed state.

[0036] Figure 6 This is a schematic diagram of the counterweight rod and counterweight nut structure on a single self-closing valve plate of this utility model;

[0037] Figure 7 This is a schematic diagram showing the frontal positional relationship between the self-closing valve plate and the rotating shaft of this utility model;

[0038] Figure 8 This is a schematic diagram of the dual-tunnel distribution structure of this utility model.

[0039] The attached diagram lists the components represented by each number as follows:

[0040] 1-Fixed bracket, 11-Ventilation louver, 12-Sealing gasket, 13-Anchor bolt, 2-Overpressure valve frame, 21-Rotating shaft, 22-Self-closing valve plate, 23-Sealing strip, 3-Fire damper, 4-Counterweight rod, 41-Counterweight nut. Detailed Implementation

[0041] Please see Figures 1 to 8 As shown, this utility model provides a bidirectional residual pressure regulating device for tunnels. To better understand the above technical solution, the following will describe the above technical solution in detail with reference to the accompanying drawings and specific embodiments.

[0042] In a specific embodiment of the technical solution of this utility model:

[0043] Includes a fixed frame 1, a pressure relief valve frame 2, a fire damper 3, and a counterweight rod 4;

[0044] The fixing frame 1 is a square tube structure with openings at both ends. The fixing frame 1 is fixedly embedded in the wall and penetrates both sides of the wall.

[0045] A ventilation louver 11 is installed at each of the two openings of the mounting bracket 1, and the ventilation louver 11 completely covers and blocks the opening of the mounting bracket 1. The mounting bracket 1 is an aluminum alloy component, and the mounting bracket serves to integrate and fix the entire device in the tunnel wall. The inner wall of the ventilation louver 11 is also covered with a sealing gasket 12, which is a rubber gasket. When needed, the sealing gasket 12 is a gasket made of fireproof rubber, which works with the fire damper 3 to isolate fire.

[0046] Ventilation louvers 11 are ventilation louvers that prevent insects and rodents from entering the fixed frame 1 and also prevent debris from falling into the fixed frame 1 channel. They also protect the internal pressure relief valve and fire damper 3 while taking into account aesthetics.

[0047] The interior of the mounting bracket 1 is also equipped with a fire damper 3 and a pressure relief valve frame 2;

[0048] Both the fire damper 3 and the pressure relief valve frame 2 are square frame structures. The fire damper 3 and the pressure relief valve frame 2 do not contact each other and are arranged parallel to each other.

[0049] Both the fire damper 3 and the pressure relief valve frame 2 completely cover and block the inner cavity of the fixed frame 1; the fire damper 3 is only activated when the temperature is too high. The fire damper 3 is normally in the open ventilation state, and remains closed when a fire starts, completely sealing and isolating both sides of the fixed frame 1 to prevent the fire from spreading.

[0050] The pressure relief valve frame 2 is a hollow square frame with openings at both the left and right ends. Multiple rotating shafts 21 are horizontally arranged inside the pressure relief valve frame 2, and each rotating shaft 21 is evenly spaced at the same height in the same vertical plane.

[0051] Each rotating shaft 21 is rotatably mounted with a self-closing valve plate 22, which is rotatably suspended on a horizontal rotating shaft 21 via a bearing.

[0052] The self-closing valve plate 22 is an aluminum alloy baffle; the pressure relief valve frame 2 is an aluminum alloy square frame.

[0053] The self-closing valve 22 opens by swinging left and right along a pivot. The self-closing valve 22 can also rest between two adjacent pivots 21. The self-closing valve 22 swings with the airflow. When the airflow pushes the self-closing valve 22 to swing and is blocked by the pivot 21, the self-closing valve 22 seals the gap between the two adjacent pivots 21. Conversely, when the airflow pushes the self-closing valve 22 upward, the gap covered by the self-closing valve 22 forms an open airflow channel. The two adjacent self-closing valves 22 open in opposite directions.

[0054] An arc-shaped sealing strip 23 is also provided on the lower edge of the self-closing valve plate 22. The arc-shaped groove of the sealing strip 23 fits and seals with the rotating shaft 21. The shape of the arc-shaped concave surface of the rotating shaft 21 matches that of the sealing strip 23. Each rotating shaft 21 blocks the rotation path of the self-closing valve plate 22 above it. In this way, when there is no air pressure difference on both sides of the wall where the fixing bracket 1 is installed, the weight of the counterweight rod 4 will press the self-closing valve plate 22 downward and tighten it, so that the sealing strip 23 is snapped and fitted onto the rotating shaft 21 below, achieving a sealing effect.

[0055] The two adjacent self-closing valve plates 22 are located on opposite sides of the plane of the rotating shaft 21, so that the two adjacent self-closing valve plates 22 can swing open in opposite directions.

[0056] Multiple counterweight rods 4 are also provided on the self-closing valve plate 22; the counterweight rods 4 are screw rods, and the counterweight rods 4 are locked onto the self-closing valve plate 22 by threads;

[0057] Multiple counterweight rods 4 on the self-clinching valve plate 22 are evenly distributed in the horizontal direction;

[0058] The counterweight rod 4 is also locked with a counterweight nut 41. Any number of counterweight nuts 41 are installed on each counterweight rod 4, and the counterweight can be adjusted according to actual needs. The counterweight weight can be adjusted according to the wind force in the environment. Only different numbers of counterweight nuts 41 need to be installed, which makes it very convenient to use and operate.

[0059] It should be noted that:

[0060] 1. A conventional pressure relief valve is a complete sealed plate with a rated weight. When the air pressure is unstable, it exhausts and releases pressure to one side. This device has multiple self-closing valve plates 22, and each self-closing valve plate 22 can be individually controlled to open or close. Moreover, the counterweight rod 4 and counterweight nut 41 on each self-closing valve plate 22 can be added or removed individually, so that the air pressure that each self-closing valve plate 22 can withstand is different. This allows the device to open pressure relief channels with different valve plate angles for various air pressure values, achieving the purpose of horizontal flow static pressure balance. That is, when the air pressure difference between the two sides is 5pa, one self-closing valve plate 22 opens at a small angle. When the air pressure difference between the two sides reaches 15pa or more, the air pressure is sufficient to push the self-closing valve plate 22 to form a larger angle, making more airflow channels and achieving the purpose of faster pressure relief. The pressure relief valve opens different flow areas according to different air pressure differences, and opens different sizes of airflow channels for different pressure differences, automatically and flexibly releasing pressure. Therefore, this device is particularly suitable for smoke prevention requirements in tunnel cross passages that require bidirectional evacuation.

[0061] 2. In this device, multiple self-closing valve plates 22 are stacked vertically, and the opening directions of the two vertical self-closing valve plates 22 are opposite. This ensures that the opening of any self-closing valve plate 22 in any direction is achieved by skipping one vertically and one horizontally in opposite directions. Figure 3 and Figure 4 As shown, the airflow is smoother and less concentrated. This intermittent airflow channel easily forms a slow flow, and the flow velocity is not small, which plays a role in guiding the slow flow.

[0062] 3. The counterweight rod 4 of this device can be used with the counterweight nut 41 to adjust the pressure value. It can be adjusted according to different weights as needed so that the self-closing valve plate 22 can be opened or closed under different air pressure differences. At the same time, because the weight is different, and the self-closing valve plate 22 is rotated open, the opening range is also different when the pressure difference is large, so as to achieve the purpose of automatically adjusting the opening degree.

[0063] When this utility model is in use, when the air pressure on the left side is high, the indoor pressure needs to be released. This pressure will push the self-closing valve plate 22 to the right. The self-closing valve plate 22, which cannot move to the right, will be blocked by the rotating shaft 21 below and kept closed. At this time, the self-closing valve plate 22 is opened for ventilation at intervals above and below, so that the pressure on both sides of the space is balanced.

[0064] Conversely, when the air pressure on the right side is greater, such as Figure 4 The airflow shown will push the vertical valve plate 22 to the left to open, causing the gas in the residual pressure valve frame 2 to flow to the left and reach stability again.

[0065] This allows the device to perform bidirectional pressure stabilization, and when the air pressure on both sides is balanced, each self-closing valve 22... Figure 5 As shown, the pressure from the counterweight rod 4 and the counterweight nut 41 causes the air to fall downwards, while the sealing strip 23 is sealed to the lower rotating shaft 21, closing the residual pressure valve frame 2. This prevents the interior of the fixed frame 1 from flowing smoothly and keeps it stationary, preventing airflow from interacting and achieving static pressure. Only when the air pressure difference on both sides exceeds the weight of the counterweight rod 4 and the counterweight nut 41 installed on the self-falling valve plate 22 will airflow be generated, and the pressure will be stabilized and balanced again.

[0066] This device has multiple self-closing valve plates 22, and different weights of counterweights can be installed on the self-closing valve plates 22 at different heights, so that different numbers of self-closing valve plates 22 can be opened under different pressure differences, and the same self-closing valve plate 22 can be opened to different degrees, so as to achieve the function of flexibly adjusting and flexibly setting the air pressure value.

[0067] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A bidirectional excess pressure regulating device for a tunnel, characterized in that, The utility model relates to a fixed frame (1), residual pressure valve frame (2), fire damper (3) and counterweight rod (4) are included: The fixed frame (1) is the square tube structure of both ends opening, the fixed frame (1) is fixedly embedded in the wall body, and the fixed frame (1) penetrates the two sides of the wall body where it is located, The fixed frame (1) both ends opening all each set up a ventilation louver (11), the ventilation louver (11) completely covers the opening of fixed frame (1) and blocks, The inside of fixed frame (1) is also provided with fire damper (3) and residual pressure valve frame (2), Fire damper (3) and residual pressure valve frame (2) are all square frame structure, fire damper (3) and residual pressure valve frame (2) do not contact each other, and fire damper (3) and residual pressure valve frame (2) are parallelly arranged, Fire damper (3) and residual pressure valve frame (2) are all completely covered in the inner chamber of fixed frame (1), The residual pressure valve frame (2) is the hollow square frame of both ends opening, the inside of residual pressure valve frame (2) is horizontally provided with multiple rotating shafts (21), each rotating shaft (21) is uniformly arranged in the same vertical plane, Each rotating shaft (21) is rotatably installed with a valve plate (22), the valve plate (22) can swing and open between the upper and lower adjacent two rotating shafts (21), and the opening direction of the upper and lower adjacent two valve plates (22) is opposite, The valve plate (22) is further provided with multiple counterweight rods (4). The fixed frame (1) is an aluminum alloy fixing frame, the inner wall of the ventilation louver (11) is further covered with a sealing gasket (12), and the sealing gasket (12) is a rubber pad; 2. A bidirectional excess pressure regulating device according to claim 1, characterized in that: The ventilation louver (11) is a pest-proof ventilation louver window. The valve plate (22) is rotatably hung on a horizontal rotating shaft (21) through a bearing; 3. A bi-directional pressure regulating device according to claim 1, wherein: The valve plate (22) is an aluminum alloy baffle, and the residual pressure valve frame (2) is an aluminum alloy square frame. An arc-shaped sealing strip (23) is further arranged on the lower side edge of the valve plate (22), the arc-shaped groove of the sealing strip (23) is in close contact with the rotating shaft (21), and each rotating shaft (21) blocks the rotating path of the valve plate (22) above it; 4. The bidirectional pressure regulating device of claim 1, wherein: The upper and lower adjacent two valve plates (22) are respectively located on the two sides of the plane where the rotating shaft (21) is located. The counterweight rod (4) is a screw rod, and the counterweight rod (4) is locked on the valve plate (22) through threads; 5. The bidirectional excess pressure regulating device of claim 1, wherein: The multiple counterweight rods (4) on the valve plate (22) are uniformly distributed in the horizontal direction; A counterweight nut (41) is further locked on the counterweight rod (4). ​

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