Automatic water plugging valve for spray fire-fighting pipeline of storage tank

Abstract

The utility model relates to the field of valves, in particular to an automatic water plugging valve for a spray fire-fighting pipeline of a storage tank. The automatic water plugging valve comprises a valve body provided with an outlet end, and an abutting platform is formed in the outlet end; the valve element is arranged at the outlet end in a floatable mode; a push-pull rod extending out of the outlet end is arranged on the valve core; the compression spring sleeves the circumferential outer side of the push-pull rod, and the two ends of the compression spring abut against the abutting platform and the valve element correspondingly; the limiting piece is arranged on the push-pull rod and can abut against the end face of the outlet end. By means of the arrangement, when the fire-fighting pipeline is not used, the valve element is separated from the outlet end through the elastic force of the compression spring, the outlet end is in an open state, liquid in the fire-fighting pipeline can flow out freely, and therefore the corrosion speed of the pipeline is slowed down, and the service life of the fire-fighting pipeline is prolonged. And the situation of frost crack of the valve pipeline caused by freezing of undrained liquid in the pipeline in cold weather is avoided.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to an automatic water blocking valve for a storage tank spray fire protection pipeline. Background Art

[0002] In the oil storage and transportation industry, the tank spray device is a water cooling facility installed on the oil tank. When the tank temperature is too high or a fire occurs, the tank water spray pipeline can spray a large amount of water to the surrounding environment, and the water flows down from the tank top through the tank wall to reduce the tank temperature, thereby achieving the purpose of controlling the fire or even extinguishing the fire.

[0003] Therefore, the fire water source should have sufficient water volume and pressure to ensure that the sprinkler system can be activated in time and provide sufficient water volume in the event of a fire. When the fire sprinkler system is activated, the fire pump pumps the fire water in the fire water pool through the pipeline to the tank fire sprinkler pipeline. At this time, the pressure in the pipeline is about 0.2-0.5MPa; with the activation of the fire sprinkler system or the water formed by condensation of water vapor in the air, it gathers along the pipeline, resulting in water accumulation at the end of the fire sprinkler pipeline. In order to slow down the rusting speed of the pipeline, avoid rust residue blocking the pipeline, and prevent accumulated water from freezing and damaging the pipeline, the fire pipeline needs to be drained and slag removed regularly.

[0004] The existing tank fire sprinkler pipeline is drained and slag removed by manually opening the ball valve at the bottom of the fire pipeline regularly. However, the formation speed of condensed water is greatly affected by environmental factors, and the rust residue at the bottom of the pipeline is easy to accumulate and agglomerate, causing the pipeline to be blocked. Although the ball valve is opened regularly, the water in the pipeline cannot be discharged. When the temperature is low for a long time in winter, once the accumulated water freezes, the subsequent condensed water will be more difficult to discharge, and the pipeline will often be frozen and cracked, which affects the stable operation of the tank sprinkler system and is not conducive to the safety protection of the tank.

[0005] Therefore, this field needs a new technical solution to solve the above problems. Summary of the invention

[0006] In order to improve or solve the technical problem that water in fire-fighting pipelines is difficult to discharge in the prior art, the utility model provides an automatic water shutoff valve for tank sprinkler fire-fighting pipelines. The automatic water shutoff valve comprises: a valve body having an opposite inlet end and an outlet end, and a support platform formed in the outlet end; a valve core arranged at the outlet end in a floating manner and configured to close the outlet end; a push-pull rod extending out of the outlet end is arranged on the valve core; a compression spring is sleeved on the circumferential outer side of the push-pull rod and its two ends are respectively against the support platform and the valve core; a limiter is arranged on the push-pull rod and configured to abut against the end surface of the outlet end.

[0007] In the utility model, the automatic water shutoff valve for the tank sprinkler fire protection pipeline includes a valve body, a valve core, a compression spring and a limiter. The valve body has an inlet end and an outlet end, and the water flow in the fire protection pipeline flows into the valve body from the inlet end and flows out of the valve body from the outlet end. The valve core is arranged at the outlet end in a floating manner, and the outlet end can be opened and closed. When the valve core abuts against the inner wall of the outlet end, the valve core closes the outlet end; when the valve core floats to the inside of the valve body and forms a gap with the inner wall of the outlet end, the valve core opens the outlet end. The compression spring is sleeved on the outside of the push-pull rod and the two ends are respectively abutted against the abutment platform and the valve core, which is used to push the valve core into the valve body, thereby keeping the outlet end open. When the fire-fighting pipeline is not activated, the elastic force of the compression spring separates the valve core from the outlet, and the valve outlet is open, so that the liquid in the fire-fighting pipeline can flow out freely, thereby reducing the corrosion rate of the pipeline and avoiding the situation where the valve pipeline is frozen and cracked due to the liquid freezing in the pipeline in cold weather; when the fire-fighting pipeline is activated, the pressure in the fire-fighting pipeline exceeds the elastic force of the compression spring, and the valve core contacts the valve body to form a seal, so that the valve is closed. The limiter is arranged on the push-pull rod and can abut on the end face of the outlet end, which can prevent the push-pull rod from extending into the valve body under the action of the compression spring, so that the valve can be manually closed when necessary. Through the above-mentioned arrangement, the automatic water shut-off valve of the utility model for the tank sprinkler fire protection pipeline can avoid the distance between the valve core and the valve body by compressing the elastic coefficient of the spring and the pressure in the fire protection pipeline. When the fire protection pipeline is not activated, the elastic force of the compression spring separates the valve core from the outlet end, and the valve outlet is in the open state. The liquid in the fire protection pipeline can flow out freely, thereby reducing the corrosion rate of the pipeline and avoiding the situation where the valve pipeline is frozen and cracked due to the freezing of the liquid in the pipeline when the weather is cold.

[0008] In the preferred technical solution of the automatic water shutoff valve for the fire protection pipeline of the tank sprinkler, a branch pipe connected to the valve body is also included, and a filter screen is arranged in the branch pipe and inserted obliquely into the valve body. Through the above arrangement, the filter screen can filter the liquid flowing in from the inlet end to prevent the outlet end from being blocked; at the same time, the obliquely inserted filter screen can accommodate more solid impurities and reduce the efficiency of manual slag discharge.

[0009] In the preferred technical solution of the automatic water shutoff valve for the tank sprinkler fire protection pipeline, an end cap is detachably arranged at one end of the branch pipe away from the valve body. Through the above arrangement, the arrangement of the end cap can more conveniently remove the filter screen, thereby cleaning the filter screen.

[0010] In the preferred technical solution of the automatic water shutoff valve for the tank sprinkler fire protection pipeline, a sealing ring is sleeved on the circumferential outer side of the valve core. Through the above arrangement, the arrangement of the sealing ring can enhance the sealing performance of the valve core and the valve body.

[0011] In the preferred technical solution of the automatic water shutoff valve for the fire protection pipeline of the tank sprinkler, a coating is coated on the outer side of the push-pull rod to facilitate observation of the position of the push-pull rod. Through the above arrangement, the arrangement of the coating can more conveniently distinguish the length of the push-pull rod exposed at the outlet end, thereby judging the open state of the valve; when the push-pull rod extends longer from the outlet end, the valve is in a closed state; when the push-pull rod extends shorter from the outlet end, the valve is in an open state.

[0012] In the preferred technical solution of the automatic water shutoff valve for the fire protection pipeline of the tank sprinkler, a limit groove matching the limit piece is provided at the position of the outlet end near the end surface. Through the above arrangement, the limit groove matches the limit piece to limit the floating direction of the push-pull rod; when the limit piece extends into the limit groove, the valve is in an open state; when the limit piece is outside the limit groove, the valve is in a closed state.

[0013] In the preferred technical solution of the automatic water shutoff valve for the tank sprinkler fire protection pipeline, a baffle that can close part of the limit groove is installed on the end surface. Through the above arrangement, the baffle is used to close the limit groove, so that the limit member cannot extend into the limit groove, thereby keeping the valve closed.

[0014] In the preferred technical solution of the automatic water shutoff valve for the tank sprinkler fire protection pipeline, the limiter is inserted on the push-pull rod. Through the above arrangement, the plug-in structure facilitates the connection between the limiter and the push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0016] Figure 1 The utility model is a schematic diagram of the cross-sectional structure of an automatic water blocking valve used for a tank spray fire protection pipeline.

[0017] Figure 2 The utility model is a structural schematic diagram of a valve core in an automatic water blocking valve for a tank spray fire protection pipeline.

[0018] Figure 3 The utility model is a schematic diagram of the automatic opening state of the automatic water blocking valve used for the tank sprinkler fire protection pipeline.

[0019] Figure 4 The utility model is a schematic diagram of the automatic closing state of the automatic water blocking valve used for the tank sprinkler fire protection pipeline.

[0020] Figure 5 The utility model is a schematic diagram of the manual closing state of the automatic water blocking valve used for the tank sprinkler fire protection pipeline.

[0021] Figure 6 yes Figure 5A magnified schematic diagram of center A.

[0022] Figure 7 The utility model is a structural schematic diagram of a baffle in an automatic water blocking valve for a tank spray fire protection pipeline.

[0023] List of reference numerals: 1. valve body; 11. inlet end; 12. outlet end; 121. end face; 13. branch pipe; 14. filter screen; 15. end cover; 16. limit groove; 17. baffle; 18. mounting nail; 2. valve core; 21. push-pull rod; 22. sealing ring; 3. compression spring; 4. limit member. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0025] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In order to improve or solve the technical problem that water in the fire-fighting pipeline is difficult to discharge in the prior art, the utility model provides an automatic water shutoff valve for a tank sprinkler fire-fighting pipeline. The automatic water shutoff valve comprises: a valve body 1, having an inlet end 11 and an outlet end 12 opposite to each other, and a support platform formed in the outlet end 12; a valve core 2, which is arranged at the outlet end 12 in a floating manner and configured to close the outlet end 12; a push-pull rod 21 extending out of the outlet end 12 is arranged on the valve core 2; a compression spring 3, which is sleeved on the circumferential outer side of the push-pull rod 21 and has two ends respectively abutting against the support platform and the valve core 2; a limiter 4, which is arranged on the push-pull rod 21 and configured to abut against the end face 121 of the outlet end 12.

[0028] Figure 1 This is a schematic cross-sectional view of the utility model of an automatic water shutoff valve for a tank sprinkler fire protection pipeline. Figure 1 As shown, in one or more embodiments, the automatic water shutoff valve for a tank fire protection pipeline of the utility model includes a valve body 1, a valve core 2, a compression spring 3 and a limiter 4.

[0029] Continue to see Figure 1 In one or more embodiments, the valve body 1 has an inlet end 11 and an outlet end 12 opposite to each other, and the liquid in the fire-fighting pipeline flows into the valve body 1 from the inlet end 11 and flows out of the valve body 1 from the outlet end 12. Preferably, a flange is provided at the inlet end 11 of the valve body 1, and the valve body 1 and the fire-fighting pipeline form a fixed and sealed connection through the flange. Alternatively, the valve body 1 can also form a fixed and sealed connection with the fire-fighting pipeline through other suitable connection structures, such as welding, clamp connection, etc. Preferably, the outlet end 12 of the valve body 1 is roughly in the shape of a conical funnel, and a support platform is formed in the outlet end 12 for installing the compression spring 3. In one or more embodiments, the automatic water shut-off valve also includes a branch pipe 13, which is arranged on the circumferential wall of the valve body 1 and connected to the valve body 1. An end cap 15 is detachably arranged at one end of the branch pipe 13 away from the valve body 1. Preferably, the end cap 15 and the branch pipe 13 form a detachable fixed connection through a flange. Furthermore, a filter screen 14 is arranged in the branch pipe 13, and one end of the filter screen 14 is obliquely inserted into the valve body 1 to filter the liquid flowing in from the inlet end 11. Specifically, the filter screen 14 is made of rigid material.

[0030] Figure 2 This is a schematic diagram of the structure of the valve core in the automatic water blocking valve used in the tank sprinkler fire protection pipeline of the utility model. Figure 1 and Figure 2 As shown, the valve core 2 can be arranged at the outlet end 12 in a floating manner. In one or more embodiments, the upper part of the valve core 2 is roughly hemispherical, and the lower part of the valve core 2 is roughly frustoconical. The upper part of the hemispherical valve core 2 is suitable for receiving liquid impact, and the lower part of the frustoconical valve core 2 can match the outlet end 12, thereby closing the outlet end 12. Further, a push-pull rod 21 is provided on the valve core 2, and the push-pull rod 21 extends out of the outlet end 12. The compression spring 3 is sleeved on the circumferential outer side of the push-pull rod 21, and the two ends of the compression spring 3 are respectively against the abutment platform and the valve core 2. Further, a coating is coated on the outer side of the push-pull rod 21 to facilitate observation of the position of the push-pull rod 21. Preferably, the coating is a red paint coating, which is convenient for staff to observe. Further, a sealing ring 22 is sleeved on the circumferential outer side of the valve core 2, and the sealing ring 22 is against the outlet end 12 to enhance the sealing performance of the valve core 2 and the valve body 1. Furthermore, a plug hole is provided in the middle of the push-pull rod 21 , and the limiter 4 is plugged into the push-pull rod 21 and can move with the push-pull rod 21 .

[0031] Figure 3 It is a schematic diagram of the automatic opening state of the automatic water blocking valve used for the tank sprinkler fire protection pipeline of the utility model; Figure 4 It is a schematic diagram of the automatic closing state of the automatic water blocking valve used for the tank sprinkler fire protection pipeline of the utility model; Figure 5 It is a schematic diagram of the manual closing state of the automatic water shutoff valve used for the tank sprinkler fire protection pipeline of the utility model; Figure 6 yes Figure 5 The enlarged schematic diagram of point A in the middle; Figure 7 This is a schematic diagram of the structure of the baffle in the automatic water blocking valve used in the tank sprinkler fire protection pipeline of the utility model. Figures 3 to 5 As shown, in one or more embodiments, the outlet end 12 of the valve body 1 has an end face 121, and a limiting groove 16 matching the limiting member 4 is provided at a position of the outlet end 12 near the end face 121. Specifically, the limiting groove 16 is roughly in the shape of an elongated strip and its opening is provided on the end face 121. The limiting groove 16 extends toward the interior of the valve body 1 so that the limiting member 4 can slide along the limiting groove 16 toward the interior of the valve body 1. Furthermore, a baffle 17 is installed on the end face 121, which can close part of the limiting groove 16. Specifically, the baffle 17 is roughly in the shape of a rectangular plate with a long side and a short side, and the baffle 17 is rotatably installed on the end face 121 by means of a mounting nail 18. Based on Figure 6 In the orientation shown, when the long side of the baffle 17 is rotated to extend left and right, the baffle 17 closes part of the limit slot 16, so that the limit member 4 cannot extend into the limit slot 16; when the short side of the baffle 17 is rotated to extend left and right, the baffle 17 is away from the limit slot 16, and the limit member 4 can extend into the limit slot 16.

[0032] When the tank sprinkler system is not activated, the pressure in the fire-fighting pipeline is equal to the atmospheric pressure. At this time, under the action of the compression spring 3, the valve core 2 and the valve body 1 are in a non-contact state, and the valve is in an open state. The liquid from the fire-fighting pipeline can flow into the valve body 1 from the inlet end 11 and flow out freely from the outlet end 12, effectively preventing water from accumulating in the pipeline and freezing the pipeline.

[0033] When the tank sprinkler system is activated, the fire-fighting pipeline is filled with fire-fighting liquid with a certain pressure. The fire-fighting liquid flows in from the inlet end 11, impacts the hemispherical surface of the valve core 2, and pushes the valve core 2 to overcome the elastic force of the compression spring 3 and move downward, causing the valve core 2 to press the sealing ring 22 against the inner wall of the valve body 1, so that the valve automatically switches from the open state to the closed state. At this time, no fire-fighting liquid flows out from the outlet end 12, ensuring that the tank sprinkler system pipeline is in a normal pressure state.

[0034] When it is necessary to manually close the automatic water shut-off valve, the push-pull rod 21 is manually pulled downward until the valve is in a closed state, and the limit member 4 is just moved down along the limit groove 16 to completely expose the end face 121, and the valve core 2 is rotated 90° along the circumferential line of the valve core 2 so that the limit member 4 is horizontally mounted on the end face 121 of the valve body 1. At this time, the valve is in a closed state, and due to the obstruction of the limit member 4, the valve cannot be opened automatically; by rotating the baffle plate 17, the baffle plate 17 blocks part of the positioning groove. At this time, the limit member 4 cannot fall freely into the limit groove 16, and a safety device is added to prevent the valve from opening accidentally.

[0035] So far, the technical scheme of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical schemes after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An automatic water shutoff valve for a tank sprinkler fire protection pipeline, characterized in that: include: A valve body (1) having an inlet end (11) and an outlet end (12) opposite to each other, and an abutment platform formed in the outlet end (12); A valve core (2) is arranged in a floating manner at the outlet end (12) and is configured to close the outlet end (12); a push-pull rod (21) extending out of the outlet end (12) is provided on the valve core (2); A compression spring (3) is sleeved on the outer circumferential side of the push-pull rod (21) and has two ends respectively abutting against the abutment platform and the valve core (2); A limiting member (4) is arranged on the push-pull rod (21) and is configured to abut against an end surface (121) of the outlet end (12).

2. The automatic water shutoff valve for a tank sprinkler fire protection pipeline according to claim 1 is characterized in that: It also comprises a branch pipe (13) connected to the valve body (1), wherein a filter screen (14) is arranged in the branch pipe (13) and is obliquely inserted into the valve body (1).

3. The automatic water shutoff valve for a tank sprinkler fire protection pipeline according to claim 2 is characterized in that: An end cover (15) is detachably arranged at one end of the branch pipe (13) away from the valve body (1).

4. The automatic water shutoff valve for a tank sprinkler fire protection pipeline according to claim 1 is characterized in that: A sealing ring (22) is sleeved on the circumferential outer side of the valve core (2).

5. The automatic water shutoff valve for a tank sprinkler fire protection pipeline according to claim 1 is characterized in that: The outer side of the push-pull rod (21) is coated with a coating which facilitates observation of the position of the push-pull rod (21).

6. The automatic water shutoff valve for a tank sprinkler fire protection pipeline according to claim 1, characterized in that: A limiting groove (16) matching the limiting member (4) is provided at a position of the outlet end (12) close to the end surface (121).

7. The automatic water shutoff valve for a tank sprinkler fire protection pipeline according to claim 6, characterized in that: A baffle (17) capable of closing a portion of the limiting groove (16) is installed on the end surface (121).

8. The automatic water shutoff valve for a tank sprinkler fire protection pipeline according to claim 1, characterized in that: The limiting member (4) is inserted into the push-pull rod (21).

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