Automatic antifreeze device for outdoor fire hydrant and use method thereof

Abstract

The present invention discloses an automatic antifreeze device for an outdoor fire hydrant and a method for using the device, comprising a tubular body, a drain hole is provided below the tubular body, a mounting seat is further provided inside the tubular body, a rotating shaft is rotatably installed on the mounting seat, a cover plate and a water baffle are fixed on the rotating shaft, the cover plate is located above the drain hole, and the cover plate and the water baffle are perpendicular to each other; the cover plate and the water baffle rotate around the mounting seat through the rotating shaft, and there are two states: the cover plate is tightly fitted with the drain hole and the cover plate is separated from the drain hole; the bypass pipe is also provided with a water ejector, and the water ejector is provided with a water suction pipe. The present invention arranges a rotary spring on the rotating shaft to keep the cover plate in an open state when not in use, realizes automatic water discharge, and discharges the water in the pipe on the freezing line to the sump in the valve well, ensuring that the pipe of the outdoor fire hydrant does not freeze in winter; the water ejector can pump back the accumulated water in the sump, and automatically discharge the accumulated water in the sump.

Description

Technical Field

[0001] The invention belongs to the technical field of fire hydrants, and in particular relates to an automatic antifreeze device for an outdoor fire hydrant and a use method thereof. Background Art

[0002] Outdoor fire hydrants are water supply facilities installed on the fire water supply network outside the building. They are mainly used for fire trucks to take water from the municipal water supply network or the outdoor fire water supply network to extinguish fires. They can also be directly connected to water hoses and water guns to discharge water for fire fighting. They are one of the important fire fighting facilities for fire fighting. Due to the low temperature in winter, the accumulated water in the fire hydrant cavity will freeze and block it after use or testing, which will cause the fire water supply to be paralyzed and cause serious loss of life and property. Therefore, the antifreeze work of fire hydrants is particularly important.

[0003] At present, there are two main types of outdoor fire hydrants in my country, directly installed on the ground and installed in underground wells. For both installation types, the solution to antifreeze is to install an automatic water discharge device at the built-in water outlet valve of the conventional fire hydrant, which automatically discharges the accumulated water in the fire hydrant when the built-in water outlet valve is closed. The accumulated water in the fire hydrant directly installed on the ground flows directly into the pre-buried underground pebble pit and then penetrates into the soil; while the accumulated water in the fire hydrant installed in underground wells flows directly into the well.

[0004] Although the outdoor fire hydrant is equipped with an automatic water discharge device, when the built-in water outlet valve is closed, the accumulated water in the outdoor fire hydrant is automatically discharged to prevent the fire hydrant from freezing and cracking. However, in actual use, the automatic water discharge device requires the built-in water outlet valve to be closed, and the automatic water discharge device has no drainage facilities, which is inconvenient to use. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems and to provide an automatic antifreeze device with a simple structure, which can automatically drain the water in the pipe and ensure that the pipe of the outdoor fire hydrant does not freeze in winter, and a method for using the device.

[0006] To this end, the first technical solution of the present invention is: an automatic antifreeze device for an outdoor fire hydrant, comprising a tubular main body, wherein the two ends of the tubular main body are respectively a water inlet end and a water outlet end, and a drainage hole is provided at the bottom of the tubular main body; a mounting seat is also provided in the tubular main body, and a rotating shaft is rotatably installed on the mounting seat, and a cover plate and a water baffle are fixed on the rotating shaft, and the cover plate is located above the drainage hole, the cover plate and the water baffle are perpendicular to each other, and the water baffle is close to the water inlet end; the cover plate and the water baffle rotate around the mounting seat through the rotating shaft, and there are two states: the cover plate is tightly fitted to the drainage hole and the cover plate is separated from the drainage hole; a bypass pipe is also included, and the two ends of the bypass pipe are respectively connected to the water inlet end and the water outlet end of the tubular main body, a water ejector is provided on the bypass pipe, and a water suction pipe is provided on the water ejector.

[0007] Preferably, the radial cross-section of the tubular body is a rectangular structure, the radial cross-sections of the water inlet end and the water outlet end are circular structures, and the diameters of the water inlet end and the water outlet end are smaller than the width of the tubular body.

[0008] Preferably, the bypass pipe is located behind the tubular body, and both ends of the bypass pipe are connected to the water inlet and water outlet of the tubular body through an inclined pipeline, and the inclination angle of the inclined pipeline is 45 degrees.

[0009] Preferably, a rebound spring is provided on the rotating shaft to keep the cover in an open state when not in use.

[0010] Preferably, a sealing ring is provided on the cover plate and fits with the drain hole.

[0011] The second technical solution of the present invention is: a method for using an automatic antifreeze device for an outdoor fire hydrant, wherein the automatic antifreeze device is arranged in a valve well with a sump in front of an outdoor fire hydrant water supply pipe, the water inlet end of the tubular body is connected to a water inlet pipe, a water inlet valve is arranged on the water inlet pipe, and the water outlet end of the tubular body is connected to the outdoor fire hydrant water supply pipe;

[0012] During normal use, the water inlet valve is opened, and water flows into the tubular body from the water inlet end, driving the water baffle to rotate toward the water outlet end, so that the cover plate fits the drain hole, and water flows normally from the water outlet end into the outdoor fire hydrant water supply pipe;

[0013] When the water inlet valve is not in use, the water inlet valve is closed, and the water retaining plate deflects toward the water inlet end due to the action of the rebound spring, driving the cover plate to leave the drain hole. The water in the water pipe between the outdoor fire hydrant outlet and the tubular body returns to the tubular body due to gravity, and the refluxed water flows into the sump of the valve well through the drain hole;

[0014] The outlet of the water suction pipe on the water ejector is placed in the sump. When the water inlet valve is opened again, the water ejector sucks the water in the sump back to the bypass pipe, and the water flows into the outdoor fire hydrant water supply pipe together with the water in the tubular body.

[0015] The present invention arranges an automatic antifreeze device on the outdoor fire hydrant water supply pipe, which is arranged in a valve well with a sump in front of the outdoor fire hydrant water supply pipe. Usually, there is no water in the pipe on the freezing line of the outdoor fire hydrant, so that the pipe is guaranteed not to freeze in winter. When the water inlet valve is opened, the buried outdoor fire hydrant water supply pipe is supplied to the above-ground fire hydrant valve port through the tubular body, and the outdoor fire hydrant pipe is full of water, which is in a normal working state and meets the normal use of the fire truck; after closing the above-ground fire hydrant, the water pipe in the pipe on the freezing line automatically drains the water in the pipe through the tubular body and discharges it into the sump in the valve well; when the water inlet valve is opened next time, the water ejector sucks the water in the sump to the front of the tubular body, and the water with a certain water pressure in the tubular body at this time reaches the position of the outdoor fire hydrant valve port together, so that the accumulated water in the sump can be automatically discharged.

[0016] The present invention provides a rotary spring on the rotating shaft. When there is no water inflow at the water inlet end, the water baffle plate automatically deflects toward the water inlet end, keeps the cover plate in an open state when not in use, realizes automatic water discharge, and discharges the water in the pipe on the freezing line into the sump in the valve well, ensuring that the pipes of the outdoor fire hydrant are not frozen in winter; the water ejector can pump back the accumulated water in the sump, automatically discharge the accumulated water in the sump, and avoid excessive water accumulation in the sump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings.

[0018] Figure 1 It is a structural cross-sectional view of the present invention;

[0019] Figure 2 This is a schematic diagram of the cover plate of the present invention in a closed state;

[0020] Figure 3 This is a schematic diagram of the cover plate of the present invention in an open state;

[0021] Figure 4 is a side cross-sectional view of the present invention;

[0022] Figure 5 It is the installation top view of the present invention.

[0023] Marked in the figure are: tubular body 1, water inlet end 2, water outlet end 3, drain hole 4, mounting seat 5, rotating shaft 6, cover plate 7, water baffle 8, sealing ring 9, outdoor fire hydrant water supply pipe 11, sump 12, valve well 13, water inlet pipe 14, water inlet valve 15, bypass pipe 16, water ejector 17, water suction pipe 18. DETAILED DESCRIPTION

[0024] See the attached drawings. The automatic antifreeze device described in this embodiment includes a tubular body 1, the radial cross section of the tubular body is a rectangular structure, the two ends of the tubular body are respectively a water inlet end 2 and a water outlet end 3, the radial cross sections of the water inlet end and the water outlet end are circular structures, and the diameters of the water inlet end and the water outlet end are smaller than the width of the tubular body. A water drain hole 4 is provided below the tubular body 1, a mounting seat 5 is provided on the side of the water drain hole 4, a rotating shaft 6 is provided on the mounting seat 5, a cover plate 7 and a water baffle 8 are fixed on the rotating shaft 6, the cover plate 7 is located above the water drain hole 4, the cover plate 7 and the water baffle 8 are perpendicular to each other, and the water baffle is close to the water inlet end; the cover plate 7 and the water baffle 8 can rotate around the mounting seat 5 through the rotating shaft 6, and rebound springs are also wound at both ends of the rotating shaft to keep the cover plate in an open state when not in use. When rotating, a sealing ring 9 is provided on the cover plate 7, which can fit tightly with the water drain hole 4; at the same time, when rotating, the cover plate 7 can also be separated from the water drain hole 4, so that the water in the tubular body 1 is discharged from the water drain hole 4.

[0025] The tubular body 1 also includes a bypass pipe 16 at the rear, and both ends of the bypass pipe 16 are connected to the water inlet and outlet of the tubular body 1 through an inclined pipeline. The inclination angle of the inclined pipeline is 45 degrees. A water ejector 17 is provided on the bypass pipe 16, and a water suction pipe 18 is provided on the water ejector. The inlet of the water suction pipe 18 is placed in the sump 12 for extracting the accumulated water in the sump.

[0026] When in use, the automatic antifreeze device is arranged in a valve well 13 with a sump 12 in front of an outdoor fire hydrant water supply pipe 11, the water inlet end 2 of the tubular body is connected to a water inlet pipe 14, a water inlet valve 15 is arranged on the water inlet pipe 14, the operating handle of the water inlet valve can be extended to the well cover, and the water outlet end of the tubular body is connected to the outdoor fire hydrant water supply pipe 11.

[0027] During normal use, the water inlet valve 15 is opened, and water flows into the tubular body 1 from the water inlet end 2, driving the water baffle 8 to rotate toward the water outlet end 3, so that the cover plate 7 fits tightly with the drain hole 4, and the water flows normally from the water outlet end 3 into the outdoor fire hydrant water supply pipe 11;

[0028] When the water inlet valve 15 is not used, the water retaining plate 8 is deflected toward the water inlet end 2 due to the effect of the rebound spring, driving the cover plate 7 to leave the drain hole 4, and the water in the water pipe between the outdoor fire hydrant and the tubular body returns to the tubular body 1 due to gravity, and the backflowing water flows into the sump 12 of the valve well through the drain hole 4;

[0029] The nozzle of the water suction pipe 18 of the water ejector 17 is placed in the sump 12. When the water inlet valve 15 is opened again, the water ejector 17 sucks the water in the sump 12 back to the bypass pipe 16, and flows into the outdoor fire hydrant water supply pipe 11 together with the water in the tubular body 1.

Claims

1. A method for using an automatic antifreeze device for an outdoor fire hydrant, characterized in that: The automatic antifreeze device comprises a tubular body, the two ends of the tubular body are respectively a water inlet end and a water outlet end, and a water drain hole is arranged below the tubular body; a mounting seat is also arranged inside the tubular body, a rotating shaft is rotatably mounted on the mounting seat, a cover plate and a water baffle are fixed on the rotating shaft, the cover plate is located above the water drain hole, the cover plate and the water baffle are perpendicular to each other, and the water baffle is close to the water inlet end; the cover plate and the water baffle rotate around the mounting seat through the rotating shaft, and there are two states in which the cover plate is tightly fitted with the water drain hole and the cover plate is separated from the water drain hole; a bypass pipe is also included, the two ends of the bypass pipe are respectively connected to the water inlet end and the water outlet end of the tubular body, a water ejector is arranged on the bypass pipe, and a water suction pipe is arranged on the water ejector; The automatic antifreeze device is arranged in a valve well with a sump in front of the outdoor fire hydrant water supply pipe, the water inlet end of the tubular body is connected to the water inlet pipe, the water inlet pipe is provided with a water inlet valve, and the water outlet end of the tubular body is connected to the outdoor fire hydrant water supply pipe; During normal use, the water inlet valve is opened, and water flows into the tubular body from the water inlet end, driving the water baffle to rotate toward the water outlet end, so that the cover plate fits the drain hole, and water flows normally from the water outlet end into the outdoor fire hydrant water supply pipe; When the water inlet valve is not in use, the water inlet valve is closed, and the water retaining plate deflects toward the water inlet end due to the action of the rebound spring, driving the cover plate to leave the drain hole. The water in the water pipe between the outdoor fire hydrant outlet and the tubular body returns to the tubular body due to gravity, and the refluxed water flows into the sump of the valve well through the drain hole; The outlet of the water suction pipe on the water ejector is placed in the sump. When the water inlet valve is opened again, the water ejector sucks the water in the sump back to the bypass pipe, and the water flows into the outdoor fire hydrant water supply pipe together with the water in the tubular body.

2. The method for using the automatic antifreeze device of an outdoor fire hydrant according to claim 1, characterized in that: The radial cross-section of the tubular body is a rectangular structure, the radial cross-sections of the water inlet end and the water outlet end are circular structures, and the diameters of the water inlet end and the water outlet end are smaller than the width of the tubular body.

3. The method for using the automatic antifreeze device of an outdoor fire hydrant according to claim 1, characterized in that: The bypass pipe is located behind the tubular body, and both ends of the bypass pipe are connected to the water inlet and outlet of the tubular body through an inclined pipeline, and the inclination angle of the inclined pipeline is 45 degrees.

4. The method for using the automatic antifreeze device of an outdoor fire hydrant according to claim 1, characterized in that: A rebound spring is arranged on the rotating shaft.

5. The method for using the automatic antifreeze device of an outdoor fire hydrant according to claim 1, characterized in that: The cover plate is provided with a sealing ring which fits the drain hole.

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