Bidirectional air-blocking drain valve
By designing a two-way gas-blocking drain valve, which uses a gas-blocking float and a steel ball to control the opening and closing of the drain outlet, the problem of gas blockage in fire-fighting pipelines during smoke detection and fire-fighting gas release is solved, ensuring the lifespan of the smoke detection device and the fire-fighting effect.
Patent Information
- Application Number
- CN202423193987.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-24
AI Technical Summary
The existing fire protection pipeline's drain valves cannot maintain effective gas blockage simultaneously during smoke detection and fire gas release, affecting the lifespan of the smoke detection device and the fire protection effect.
Design a bidirectional gas-blocking drain valve, comprising a valve body, a gas-blocking device, and a sealing assembly. It utilizes a gas-blocking float and a steel ball to control the opening and closing of the drain outlet under different conditions, and is used for gas blocking during drainage, smoke detection, and fire-fighting gas release.
It effectively blocks gas flow in both smoke detection and fire-fighting gas release states, protecting the smoke detection device and fire-fighting performance, and avoiding blockages and rust caused by water accumulation in the pipeline.
Smart Images
Figure CN223622312U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire extinguishing technology, and in particular to a two-way gas-blocking drain valve. Background Technology
[0002] In a gas smothering system equipped with smoke detection devices, the fire extinguishing pipeline leading to the protected area serves as both the extinguishing agent delivery pipeline and the smoke detection pipeline. The fire extinguishing pipeline is primarily made of carbon steel. During long-term gas extraction, environmental factors can easily cause water to accumulate on the inner wall of the pipeline. This water accumulation can affect the lifespan of the smoke detection device during extraction. Excessive water accumulation in low-lying areas of the pipeline can also cause rust and blockage.
[0003] Therefore, a drain valve needs to be designed and installed at the low-lying pipe locations in the fire protection system for drainage. The drain valve must also have the following functions: First, when the pipeline is in smoke detection mode, it must prevent exhaust gas from passing through the drain valve into the pipeline, thus not affecting the smoke detection effect. Second, when the pipeline is in fire-fighting gas release mode, it must prevent fire-fighting gas from escaping through the drain valve, thus not affecting the fire-fighting effect. Utility Model Content
[0004] In order to overcome the above-mentioned shortcomings of the prior art, this utility model proposes a bidirectional air-blocking drain valve.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a bidirectional air-blocking drain valve, including a valve body, one end of which is a water inlet and the other end is a drain outlet. A U-shaped flow channel is opened in the valve body. An air-blocking device is connected to one end of the U-shaped flow channel at the drain outlet. The air-blocking device and the drain outlet are located on the same horizontal line and are used to open or close the drain outlet. The air-blocking device includes an air-blocking channel, an air-blocking float, and a sealing assembly. The air-blocking float is located above the sealing assembly, and the air-blocking channel is located above the air-blocking float and is connected to it. An air-blocking steel ball is provided at the bottom corner of the U-shaped flow channel.
[0006] Preferably, the sealing assembly includes a pressure ring and an O-ring. The pressure ring is located above the O-ring, and a cavity is formed in the center of the pressure ring to hold the air-blocking float. The diameter of the cavity in the pressure ring is smaller than the diameter of the air-blocking float. A cavity is formed in the center of the O-ring to hold the air-blocking steel ball. The diameter of the cavity in the O-ring is smaller than the diameter of the air-blocking steel ball. The sealing assembly can also have other structures, as long as it can hold the air-blocking float and the air-blocking steel ball while providing a seal to prevent gas from escaping from the drain outlet.
[0007] Preferably, the sealing assembly includes an O-ring made of fluororubber and a pressure ring made of polytetrafluoroethylene.
[0008] Preferably, the air-blocking steel ball is made of stainless steel, and the air-blocking float is made of PE plastic.
[0009] Preferably, a pressure plug is provided above the air-blocking device, and the pressure plug is used to seal the valve body.
[0010] Compared with the prior art, the beneficial effects of this utility model are: it solves the problem that existing drain valves cannot be used for drainage in pipes that are used for both smoke detection and fire fighting; by adding a drain interface and connecting the pipe through the interface, the problem of local dripping of drainage is solved. Attached Figure Description
[0011] Figure 1 This is a schematic diagram showing the installation location of a two-way air-blocking drain valve.
[0012] Figure 2 This is a schematic diagram of the drainage state of a two-way air-blocking drain valve.
[0013] Figure 3 This is a schematic diagram of the smoke detection status of a two-way air-blocking drain valve.
[0014] Figure 4 This is a schematic diagram of the fire-fighting gas release status of a two-way gas-blocking drain valve.
[0015] Figure 5 This is a schematic diagram of the sealing assembly installation.
[0016] The markings in the diagram are: Valve body-1, Air-blocking steel ball-3, O-ring seal-4, Pressure ring-5, Compression plug-6, Air-blocking float-7, Inlet-8, Outlet-9, U-shaped flow channel-10, Air-blocking channel-11. Detailed Implementation
[0017] The utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0018] Example 1
[0019] like Figure 1-5 As shown, a bidirectional air-blocking drain valve includes a valve body 1. One end of the valve body 1 is an inlet 8, and the other end is a drain outlet 9. The inlet 8 is installed at a low point in the fire pipeline via a welded seat. The drain outlet 9 is connected to the pipeline to drain the water accumulated in the pipeline. A U-shaped flow channel 10 is provided inside the valve body 1. An air-blocking device is connected to one end of the U-shaped flow channel 10 at the drain outlet 9. The air-blocking device is located on the same horizontal line as the drain outlet 9 and is used to open or close the drain outlet 9. The air-blocking device includes an air-blocking channel 11, an air-blocking float 7, and a sealing assembly. The air-blocking float 7 is located above the sealing assembly, and the air-blocking channel 11 is located above the air-blocking float 7 and is connected to it. An air-blocking steel ball 3 is provided at the bottom corner of the U-shaped flow channel 10.
[0020] The sealing assembly 11 consists of an O-ring 4 made of fluororubber and a pressure ring 5 made of polytetrafluoroethylene.
[0021] In this embodiment, the sealing assembly includes a pressure ring 5 and an O-ring 4. The pressure ring 5 is located above the O-ring 4, and a cavity for locking the gas-blocking float 7 is formed in the middle of the pressure ring 5. The diameter of the cavity in the pressure ring 5 is smaller than the diameter of the gas-blocking float 7. A cavity for locking the gas-blocking steel ball 3 is formed in the middle of the O-ring 4. The diameter of the cavity in the O-ring 4 is smaller than the diameter of the gas-blocking steel ball 3. The sealing assembly can also have other structures, as long as it can lock the gas-blocking float 7 and the gas-blocking steel ball 3 while sealing, preventing gas from escaping from the drain port 9.
[0022] In this embodiment, the sealing assembly includes an O-ring made of fluororubber and a pressure ring 5 made of polytetrafluoroethylene.
[0023] In this embodiment, the gas-blocking steel ball 3 is made of stainless steel, and the gas-blocking float 7 is made of PE plastic. Except for the current embodiment, the gas-blocking steel ball 3 can be made of a material with a density greater than that of the extinguishing medium, and the gas-blocking float 7 can be made of a material with a density less than that of the extinguishing medium.
[0024] In this embodiment, a pressure plug 6 is provided above the air-blocking device, and the pressure plug 6 is used to seal the valve body 1.
[0025] The working principle of this utility model is as follows: the two-way air-blocking drain valve is installed in the low-lying section of the fire pipeline.
[0026] In the drainage state (ball valve 1 and ball valve 2 are closed), the working principle of the two-way air-blocking drain valve is that the water accumulated inside the pipeline enters the flow channel inside the valve body through the water inlet, and the buoyancy of the water pushes the air-blocking float away from the sealing surface to keep the drain outlet unobstructed and drain the water.
[0027] In the smoke detection state (ball valve 1 open, ball valve 2 closed), the working principle of the two-way gas-blocking drain valve is that the smoke detection device upstream of the pipeline draws air through the pipeline, creating a negative pressure inside the pipeline. Under pressure, the gas-blocking float 7 inside the two-way gas-blocking drain valve seals with the valve's internal sealing components, preventing gas from entering the pipeline from the drain outlet.
[0028] In the gas extinguishing agent release state (ball valve 1 closed, ball valve 2 open), the working principle of the two-way gas-blocking drain valve is that the gas extinguishing agent inside the pipeline enters the U-shaped flow channel 10 inside the valve body through the water inlet 8. The gas pressure pushes the gas-blocking steel ball 3 at the bottom of the flow channel towards the sealing surface of the sealing component, so that the drain outlet 9 is in a closed state, and the fire-fighting gas cannot be discharged through the two-way gas-blocking drain valve.
[0029] The above embodiments merely illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the patent and its protection scope should be determined by the appended claims.
Claims
1. A bidirectional air-blocking drain valve, characterized in that: The valve includes a valve body (1), one end of which is an inlet (8) and the other end is a drain outlet (9). A U-shaped flow channel (10) is provided inside the valve body (1). An air-blocking device is connected to one end of the U-shaped flow channel (10) at the drain outlet (9). The air-blocking device is located on the same horizontal line as the drain outlet (9) and is used to open or close the drain outlet (9). The air-blocking device includes an air-blocking channel (11), an air-blocking float (7), and a sealing assembly. The air-blocking float (7) is located above the sealing assembly. The air-blocking channel (11) is located above the air-blocking float (7) and is connected to it. An air-blocking steel ball (3) is provided at the bottom corner of the U-shaped flow channel (10).
2. The bidirectional air-blocking drain valve as described in claim 1, characterized in that: The sealing assembly includes a pressure ring (5) and an O-ring (4). The pressure ring (5) is located above the O-ring (4), and a cavity for locking the air-blocking float (7) is opened in the middle of the pressure ring (5). The diameter of the cavity of the pressure ring (5) is smaller than the diameter of the air-blocking float (7). A cavity for locking the air-blocking steel ball (3) is opened in the middle of the O-ring (4). The diameter of the cavity of the O-ring (4) is smaller than the diameter of the air-blocking steel ball (3). The sealing assembly can also be other structures, as long as it can lock the air-blocking float (7) and the air-blocking steel ball (3) while sealing, so that gas is not discharged from the drain (9).
3. The bidirectional air-blocking drain valve as described in claim 2, characterized in that: The sealing assembly includes an O-ring made of fluororubber and a pressure ring made of polytetrafluoroethylene (5).
4. A bidirectional air-blocking drain valve as described in claim 2, characterized in that: The air-blocking steel ball (3) is made of stainless steel, and the air-blocking float (7) is made of PE plastic.
5. A bidirectional air-blocking drain valve as described in claim 1, characterized in that: A pressure plug (6) is provided above the air-blocking device, and the pressure plug (6) is used to seal the valve body (1).