Method of using a sprinkler valve with automatic closing function for fire protection piping

Abstract

The application relates to a use method of a guide valve with an automatic closing function for a fire-fighting pipeline, and belongs to the technical field of fluid conveying devices. The guide valve with the automatic closing function comprises a valve body, a water inlet is arranged at the top of the valve body, water outlets are arranged at the two ends of the bottom of the valve body, a floating switch assembly is arranged in the valve body, the floating switch assembly comprises a float ball, a valve rod, a valve seat and a valve core, one end of the valve rod is connected with the float ball, the other end of the valve rod penetrates through the valve body and is connected with the middle part of the valve seat, the valve core is arranged on the two ends of the valve seat, the valve core is arranged in the corresponding water outlet, in a standby state, there is residual liquid in the valve body, and the valve core is automatically opened under the action of gravity; in a working state, the valve body is filled with liquid, the float ball is floated, the float ball is connected with the valve core through the valve rod, and the water outlet is blocked. Beneficial effects: the guide valve with the automatic closing function can realize all-weather and all-season normal standby of the fire-fighting vertical pipe, and can also realize the purpose of low-point liquid drainage for antifreezing in winter.

Description

Technical Field

[0001] This invention belongs to the field of fluid transport device technology, specifically relating to a method of using a fire-fighting pipeline with an automatic shut-off function shower valve. Background Technology

[0002] Fire risers are installed to varying degrees on the frame structures of all types of production units. The bottom of each riser is equipped with an on / off valve, a check valve, and a low-point drainage system. Fire boxes and fire hoses are located on each frame platform. Normally, the fire risers are empty and do not receive water. The on / off valves are open, the low-point drainage systems are closed, and the pressure-reducing valves in the fire boxes at each high point are closed. When emergency fire water is needed at any of the frame's high points, simply connect the nearest fire hydrant or fire truck to the on / off valve of the fire riser using a quick-connect coupling on the fire hose, open the fire water valve, and the entire fire riser will fill with water and be pressurized. Operators can then open the fire box on the corresponding frame, connect the hose and nozzle, and open the pressure-reducing valve to begin use.

[0003] In winter, after the fire riser has been used, the low-point drain shower needs to be opened to drain the residual water in the pipe (for winter freeze prevention). Normally, after draining the residual water, the low-point drain shower should be closed to keep the fire riser ready for immediate use. However, because residual water cannot be completely drained immediately, it accumulates at the bottom of the pipe over time, eventually causing freezing and blockage, and in severe cases, pipe cracking. If the low-point drain shower is open, the fire riser cannot be kept ready at all times. If fire water is needed in an emergency and the operator forgets to close the shower, high-pressure fire water will be sprayed out, affecting emergency use and potentially causing secondary accidents. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a method for using a drain valve with an automatic shut-off function for fire pipelines. The drain valve with the automatic shut-off function can achieve normal standby of fire risers around the clock and in all seasons, while also achieving the purpose of low-point drainage and antifreeze in winter.

[0005] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A method for using a fire-fighting pipeline with an automatic shut-off function of a drain valve, the drain valve including a valve body, an inlet at the top of the valve body, and outlets at both ends of the bottom, a floating switch assembly inside the valve body, the floating switch assembly including a float, a valve stem, a valve seat, and a valve core, one end of the valve stem being connected to the float, and the other end passing through and extending out of the valve body and connecting to the middle of the valve seat, the valve core being provided at both ends of the valve seat, the valve core being disposed in the corresponding outlet, in the standby state, the valve body contains residual liquid, the valve core automatically opens under the action of gravity; in the working state, the valve body is filled with liquid, the float floats up, the float is connected to the valve core through the valve stem, thus blocking the outlet, the valve body is provided with a valve core locking mechanism on the inner wall of the valve body; when the fire riser is in normal standby state, the entire valve body is dry, and under its own gravity... When in use, the valve core moves downwards to the bottom. When residual water in the pipeline enters the valve body, it is discharged through the outlet, achieving the normally open function. After connecting the drain valve in series with the existing valve through the connecting bolt hole on the fire pipeline, the existing valve must be in the open state. At this time, the fire riser is in the standby state. When the fire pipeline is ready to use fire water, in the initial stage of water inflow, the fire water quickly fills the entire valve body, and the buoyancy of the float gradually increases. When the buoyancy is greater than its own weight, the float drives the entire mechanism to move upwards, and the valve core fits and seals with the outlet, ultimately achieving the function of valve closure. As the water in the pipeline gradually fills and pressurizes, the pressure-bearing and sealing performance of the drain valve is enhanced under the combined action of buoyancy greater than gravity and the locking mechanism. When the fire pipeline is finished and needs to be drained for standby, manually pull down the valve seat to drain the residual water. After the water in the pipe is drained, the valve will automatically open to further wait for the accumulation and discharge of residual water.

[0006] Beneficial effects: The drain valve with automatic shut-off function can ensure the normal standby of fire risers around the clock and in all seasons, while also achieving the purpose of low-point drainage and antifreeze in winter.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the valve core locking mechanism includes an unlocking pull ring, an outer cylinder, an inner cylinder, a ball, and a limiting rod. One end of the inner cylinder is fixed to the inner wall of the valve body, and the other end is slidably sleeved inside the outer cylinder. The ball is fixed to the end of the outer cylinder away from the inner cylinder. The valve stem is provided with a valve core positioning hole, and the ball can move in the valve core positioning hole. An elastic element is sleeved on the inner cylinder. The unlocking pull ring is connected to the end of the outer cylinder after passing through the valve body with a pull rope. The limiting rod is vertically provided at the bottom of the outer cylinder, and the bottom of the limiting rod is inside the water outlet.

[0009] The beneficial effects of adopting the above-mentioned further solution are: the inner and outer sides of the outlet restrict the stroke space of the stroke limit rod, and the elastic element arranged on it plays the role of buffering and storing energy, effectively realizing the tight fit between the locking mechanism and the valve stem, and ensuring the effectiveness of the valve core locking action.

[0010] Furthermore, the ball is fixed to the outer cylinder by a pin.

[0011] The advantages of adopting the above-mentioned further solutions are: good fixation and easy assembly and disassembly.

[0012] Furthermore, the elastic element is a compression spring.

[0013] The beneficial effects of adopting the above-mentioned further solution are: it acts as a buffer and energy storage mechanism, making it easier for the ball to be locked in the valve core positioning hole.

[0014] Furthermore, the valve core has a frustum structure.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the shape of the valve core matches the water outlet, resulting in a good sealing effect.

[0016] Furthermore, the outer surface of the valve core is provided with a seal.

[0017] The beneficial effects of adopting the above-mentioned further solutions are: further improving the sealing effect, preventing water leakage, and reducing the pressure inside the pipe.

[0018] Furthermore, the float is a hollow plastic structure.

[0019] The beneficial effect of adopting the above-mentioned further solution is that the buoyancy of the float is used to close the valve core.

[0020] Furthermore, the top of the valve body is provided with a connecting bolt hole.

[0021] The advantage of adopting the above-mentioned further solution is that it is easy to connect to the pipeline.

[0022] Furthermore, a bottom pull ring is provided at the bottom of the valve seat.

[0023] The beneficial effect of adopting the above-mentioned further solution is that when it is necessary to drain the liquid in the valve body, it is convenient for a person to pull the pull ring to open the valve core. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the valve core being closed according to the present invention;

[0025] Figure 2 This is a schematic diagram of the valve core of the present invention being opened;

[0026] Figure 3 This is a schematic diagram used in the present invention;

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Valve body; 2. Float ball; 3. Valve stem; 4. Valve seat; 5. Valve core; 6. Outlet; 7. Unlocking pull ring; 8. Outer cylinder; 9. Inner cylinder; 10. Compression spring; 11. Ball bearing; 12. Limiting rod; 13. Bottom pull ring; 14. Connecting bolt hole; 15. Inlet; 16. Valve core positioning hole; 17. Fire-fighting pipeline; 18. Valve. Detailed Implementation

[0029] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0030] Example

[0031] like Figure 1-2 As shown, this embodiment provides a drain valve with an automatic shut-off function, including a valve body 1. The valve body 1 has an inlet 15 at the top and outlets 6 at both ends of the bottom. A floating switch assembly is provided inside the valve body 1. The floating switch assembly includes a float 2, a valve stem 3, a valve seat 4, and a valve core 5. One end of the valve stem 3 is connected to the float 2, and the other end passes through and extends out of the valve body 1 and connects to the middle of the valve seat 4. The valve core 5 is provided at both ends of the valve seat 4. The valve core 5 is set in the corresponding outlet 6. In the standby state, there is residual liquid in the valve body 1, and the valve core 5 automatically opens under the action of gravity. In the working state, the valve body 1 is filled with liquid, the float 2 floats up, and the float 2 is connected to the valve core 5 through the valve stem 3, so as to block the outlet 6. The float 2 has a certain buoyancy (the buoyancy of the float 2 is set according to the needs of flow control). A valve core locking mechanism is provided on the inner wall of the valve body 1.

[0032] Preferably, in order to lock the valve core 5 in the working state, the valve core locking mechanism includes a locking ring 7, an outer cylinder 8, an inner cylinder 9, a ball bearing 11, and a limiting rod 12. One end of the inner cylinder 9 is fixed to the inner wall of the valve body 1, and the other end is slidably sleeved in the outer cylinder 8. The ball bearing 11 is fixed to the end of the outer cylinder 8 away from the inner cylinder 9 by a pin. The valve stem 3 is provided with a valve core positioning hole 16, and the ball bearing 11 can move in the valve core positioning hole 16. An elastic element, which is a compression spring 10, is sleeved on the inner cylinder 9. The locking ring 7 is connected to the end of the outer cylinder 8 after passing through the valve body 1 with a pull rope. The limiting rod 12 is vertically provided at the bottom of the outer cylinder 8, and the bottom of the limiting rod 12 is inside the outlet 6.

[0033] Preferably, to enhance the sealing effect of the valve core 5, the valve core 5 is a frustum structure, which is matched with the inverted frustum outlet 6, and a sealing sleeve is provided on the outer surface of the valve core 5. The sealing sleeve is made of a wear-resistant, compression-resistant, and water-swellable material, which effectively ensures the sealing performance of the valve.

[0034] Preferably, the bottom of the valve seat 4 is provided with a bottom pull ring 13.

[0035] Preferably, the float 2 is a hollow plastic structure.

[0036] The usage methods for fire-fighting pipeline shower valves with automatic shut-off function include:

[0037] When the fire riser is in normal standby mode, the entire cylinder is dry. Under its own gravity, the valve core moves downward to the bottom. When residual water in the pipeline enters the cylinder, it is discharged through the valve body hole, realizing the normally open function. The valve body 1 is equipped with a valve core locking mechanism on the inner wall.

[0038] After connecting the new type of shower valve to the lower part of the original valve 18 via the connecting bolt hole 14 on the fire pipeline 17, the original valve 18 needs to be in the open state. At this time, the fire riser is in standby state. When the fire pipeline 17 is ready to be filled with fire water, during the initial stage of water inflow (when the pipeline is in the water filling stage and the pressure is low), the fire water quickly fills the entire cylinder, and the buoyancy of the float 2 gradually increases. When the buoyancy is greater than its own weight, the float 2 drives the entire mechanism to move upward, and the valve core 5 fits and seals with the outlet 6. At the same time, the valve stem 3 moves upward. During the movement, when the valve core positioning hole 16 moves to the valve core locking mechanism, the valve core 5 locks, ultimately achieving the function of closing the valve. As the water in the pipeline gradually fills and pressurizes, the pressure-bearing and sealing performance of the new type of drainage system is greatly enhanced under the combined action of buoyancy greater than gravity and the locking mechanism. When the fire pipeline 17 is used up and needs to be drained for standby, simply pull out the unlocking ring 7 manually and pull down the valve seat 4 to drain the residual water. After the water in the pipe is drained, the valve will automatically be in the open state, waiting for the residual water to accumulate and be discharged.

[0039] In the description of this invention, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "inner," "outer," "circumferential," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method of using a fire-fighting pipeline with an automatic shut-off function, characterized in that, The drain valve includes a valve body (1), with an inlet (15) at the top and outlets (6) at both ends of the bottom. A floating switch assembly is installed inside the valve body (1), comprising a float (2), a valve stem (3), a valve seat (4), and a valve core (5). One end of the valve stem (3) is connected to the float (2), and the other end passes through and extends out of the valve body (1) before connecting to the middle of the valve seat (4). The valve core (5) is located at both ends of the valve seat (4). The valve core (5) is positioned on the valve body. In the corresponding outlet (6), in the standby state, there is residual liquid in the valve body (1), and the valve core (5) automatically opens under gravity; in the working state, the valve body (1) is filled with liquid, the float (2) floats, and the float (2) is connected to the valve core (5) through the valve stem (3), so that the outlet (6) is blocked. The valve body (1) is provided with a valve core locking mechanism on the inner wall; when the fire riser is in the normal standby state, the entire valve body (1) is empty of water, and under its own gravity, the valve core... (5) Move downwards to the bottom. When the residual water in the pipeline enters the valve body (1), it is discharged through the outlet (6) to achieve the function of being normally open. After connecting the drain valve to the lower part of the original valve (18) through the connecting bolt hole (14) on the fire pipeline (17), the original valve (18) needs to be in the open state. At this time, the fire riser is in the standby state. When the fire pipeline (17) is ready to use fire water, when the initial water inlet is in the early stage, the fire water quickly fills the entire valve body (1), and the buoyancy of the float (2) gradually increases. After the force is greater than its own weight, the float (2) drives the entire mechanism to move upward, and the valve core (5) fits and seals with the outlet (6), finally realizing the function of closing the valve; as the water in the pipeline gradually fills and pressurizes, under the combined action of buoyancy being greater than gravity and locking mechanism, the pressure bearing and sealing performance of the drain valve is enhanced; when the fire pipeline (17) is used up and needs to be drained for standby, manually pull down the valve seat (4) to drain the residual water. After the water in the pipe is drained, the valve will automatically be in the open state, and further wait for the accumulation and discharge of residual water.

2. The method of using the automatic shut-off valve for fire pipelines according to claim 1, characterized in that, The valve core locking mechanism includes an unlocking pull ring (7), an outer cylinder (8), an inner cylinder (9), a ball (11), and a limiting rod (12). One end of the inner cylinder (9) is fixed on the inner wall of the valve body (1), and the other end is slidably sleeved in the outer cylinder (8). The ball (11) is fixed at the end of the outer cylinder (8) away from the inner cylinder (9). The valve stem (3) is provided with a valve core positioning hole (16). The ball (11) can move in the valve core positioning hole (16). An elastic element is sleeved on the inner cylinder (9). The unlocking pull ring (7) is connected to the end of the outer cylinder (8) after passing through the valve body (1) with a pull rope. The limiting rod (12) is vertically provided at the bottom of the outer cylinder (8). The bottom of the limiting rod (12) is inside the outlet (6).

3. The method of using the automatic shut-off valve for fire pipelines according to claim 2, characterized in that, The ball (11) is fixed to the outer cylinder (8) by a pin.

4. The method of using the automatic shut-off valve for fire pipelines according to claim 2, characterized in that, The elastic element is a compression spring (10).

5. The method of using the automatic shut-off valve for fire pipelines according to claim 1, characterized in that, The valve core (5) has a frustum structure.

6. The method of using the automatic shut-off valve for fire pipelines according to claim 1, characterized in that, The outer surface of the valve core (5) is provided with a sealing sleeve.

7. The method of using the automatic shut-off valve for fire pipelines according to claim 1, characterized in that, The float (2) is a hollow plastic structure.

8. The method of using the automatic shut-off valve for fire-fighting pipelines according to any one of claims 1-7, characterized in that, The valve body (1) has a connecting bolt hole (14) at its top.

9. A method of using a fire-fighting pipeline automatic shut-off valve according to any one of claims 1-7, characterized in that, The bottom of the valve seat (4) is provided with a bottom pull ring (13).

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