Water flow indicator

Abstract

The utility model discloses a water flow indicator, which relates to the technical field of fire-fighting monitoring and comprises an accommodating cavity, a partition plate is arranged in the accommodating cavity, and the partition plate divides the accommodating cavity into a closed upper chamber and a closed lower chamber; a trigger device and a detection device are fixedly installed in the upper cavity, the trigger device comprises a rotating shaft rotationally installed on the partition plate, the lower end of the rotating shaft extends into the lower cavity and is provided with an impeller, the impeller can rotate when being impacted by water flow in the lower cavity, and a detection piece is arranged at the end, located in the upper cavity, of the upper end of the rotating shaft; the detection device is used for detecting the passing times of the detection piece in unit time; the detection device is in signal connection with the control system. Through the arrangement of the trigger device and the detection device, the water flow in the pipeline can be monitored in real time, and the starting threshold value of the fire alarm system is set, so that the detection data is more accurate; water flow can be guided through the impeller, hard collision of the water flow is avoided, and water pressure loss caused by collision is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fire monitoring, in particular to a water flow indicator. Background Art

[0002] The water flow indicator is installed on the main water supply pipeline or branch water supply pipeline of the fire sprinkler system network to detect the water flow signal. When the water flow in the pipeline reaches the set threshold, the water flow pushes the valve plate to swing, triggering the micro switch, thereby converting the water flow signal into an electrical signal, starting the fire alarm system, and at the same time feeding back the area where the fire occurred to the alarm system.

[0003] However, this structure has the following disadvantages: the water flow velocity detection in the water pipe is not accurate, and can only be detected when the water flow in the pipe reaches a certain threshold, and the micro switch can be activated. When the pipe leaks and the flow velocity in the water pipe is lower than the set threshold, it cannot be detected; in addition, the swing of the valve plate will cause a certain obstruction to the water flow when the water flows through, and the water flow will collide hard, causing water pressure loss. Utility Model Content

[0004] The purpose of the utility model is to provide a water flow indicator, which can monitor the water flow in the pipeline in real time by setting a trigger device and a detection device, and set the start threshold of the fire alarm system, so as to make the detection data more accurate; the water flow can be guided by the impeller, and a hard collision of the water flow will not be caused, thereby avoiding the water pressure loss caused by the collision.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a water flow indicator, including a accommodating chamber, in which a partition is arranged, and the partition divides the accommodating chamber into a closed upper chamber and a lower chamber; a trigger device and a detection device are fixedly installed in the upper chamber, and the trigger device includes a rotating shaft rotatably installed on the partition, the lower end of the rotating shaft extends into the lower chamber, and an impeller is installed. The impeller rotates when impacted by the water flow in the lower chamber, and the upper end of the rotating shaft is located at one end of the upper chamber and a detection piece is arranged; the detection device is used to detect the number of times the detection piece passes per unit time; the detection device signal is connected to the control system; a water inlet and a water outlet are arranged on the lower chamber at both ends of the impeller.

[0006] After adopting the above structure, when water flows in the pipeline, water enters from the water inlet and flows out from the water outlet. The incoming water impacts the impeller to rotate, thereby driving the rotating shaft to rotate, thereby driving the detection piece to rotate, and the detection device detects the number of times the detection piece passes per unit time, thereby calculating the water flow velocity according to the impeller speed, so that the measured water flow velocity is more accurate and can more accurately show whether the change in water flow velocity is caused by water seepage in the pipeline or unstable water pressure in the pipeline. In addition, the valve plate is changed to an impeller to guide the water flow and avoid water pressure loss caused by water flow collision.

[0007] In order to make the measurement data more accurate, a rotating wheel is fixedly installed on the upper end of the rotating shaft, and a number of detection pieces are evenly arranged on the rotating wheel.

[0008] In order to facilitate production and be suitable for various environments, the detection device is a proximity switch, a photoelectric sensor or an infrared sensor.

[0009] In order to convert the water flow velocity into the impeller rotation speed and reduce energy loss, the water inlet direction is along the tangent direction of the impeller.

[0010] In order to prevent the water in the lower chamber from entering the upper chamber, a mounting hole is opened in the middle of the partition, the rotating shaft is rotatably installed in the mounting hole, and a rotating sealing structure is arranged between the rotating shaft and the mounting hole.

[0011] In order to ensure the stability of the rotating shaft and the stability of the impeller during rotation, the bottom of the rotating shaft is rotatably installed at the bottom of the lower chamber, and the top of the rotating shaft is rotatably installed at the top of the upper chamber.

[0012] After adopting the above technical solution, the beneficial effects of the utility model are:

[0013] The utility model discloses a water flow indicator which solves the technical problem of inaccurate detection data of water flow indicators in the prior art. When water flows in a pipeline, water enters from a water inlet and flows out from a water outlet. The water inlet impacts the impeller to rotate, thereby driving the rotating shaft to rotate, thereby driving the detection piece to rotate, and the detection device detects the number of times the detection piece passes through a unit time, thereby calculating the water flow velocity according to the impeller rotation speed, so that the measured water flow velocity is more accurate and can more accurately show whether the change in water flow velocity is caused by water seepage in the pipeline or unstable water pressure in the pipeline. In addition, the valve plate is changed into an impeller, so as to guide the water flow and avoid water pressure loss caused by water flow collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a water flow indicator of the utility model;

[0015] Figure 2 yes Figure 1 A cross-sectional view of

[0016] Figure 3 yes Figure 1 Schematic diagram of the structure of the detection device.

[0017] In the figure, 1. accommodating chamber, 11. upper chamber, 12. lower chamber, 13. water inlet, 14. water outlet, 2. partition, 21. mounting hole, 3. trigger device, 31. rotating shaft, 33. detection sheet, 34. rotating wheel, 4. detection device. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings.

[0019] The positions mentioned in this specification are based on the positions of the water flow indicator of the utility model when it is working normally, and do not limit the positions during storage and transportation. They only represent relative position relationships, not absolute position relationships.

[0020] like Figure 1 and Figure 2 As shown together, a water flow indicator comprises a containing chamber 1 , in which a partition plate 2 is arranged, and the partition plate 2 divides the containing chamber 1 into a sealed upper chamber 11 and a lower chamber 12 .

[0021] The trigger device 3 and the detection device 4 are fixedly installed in the upper chamber 11. The trigger device 3 includes a rotating shaft 31 rotatably installed on the partition 2. The partition 2 has a mounting hole 21 in the middle. The rotating shaft 31 is rotatably installed in the mounting hole 21. A rotating sealing structure is provided between the rotating shaft 31 and the mounting hole 21. The rotating sealing structure can adopt the structure in the prior art, as long as the upper chamber 11 and the lower chamber 12 are relatively sealed and the rotating shaft 31 is smoothly rotated. This embodiment does not limit this.

[0022] The lower end of the rotating shaft 31 extends into the lower chamber 12, and an impeller is installed. The lower chamber 12 is provided with a water inlet 13 and a water outlet 14 at both ends of the impeller. In order to avoid energy loss as much as possible, the water inlet direction of the water inlet 13 is along the tangent direction of the impeller.

[0023] In order to increase the stress points of the rotating shaft 31 and ensure the stability of the rotating shaft 31, the bottom of the rotating shaft 31 is rotatably mounted on the bottom of the lower chamber 12, and the top of the rotating shaft 31 is rotatably mounted on the top of the upper chamber 11. When the impeller is impacted by the water flow in the lower chamber 12, it rotates.

[0024] like Figure 3 As shown, the upper end of the rotating shaft 31 is located at one end of the upper chamber 11 and is provided with a detection piece 33; a rotating wheel 34 is fixedly installed on the upper end of the rotating shaft 31, and a plurality of detection pieces 33 are evenly arranged on the rotating wheel 34. In this embodiment, two detection pieces 33 are provided, which are symmetrically arranged. In actual application, three or four detection pieces 33 can be designed as needed, and this embodiment does not limit this.

[0025] The detection device 4 is used to detect the number of times the detection piece 33 passes in a unit time. The detection device 4 is a proximity switch, a magnetic induction switch, a photoelectric sensor or an infrared sensor. The corresponding detection piece 33 is set according to the detection object of the detection device 4. If the detection device 4 is a magnetic induction switch, the detection piece 33 can be a magnetic induction piece. The conversion formula between water flow velocity and impeller speed is: V (水流速度) =2πRn / T, where R is the radius of the impeller, n is the number of turns, and T is the unit time.

[0026] The detection device 4 is connected to the control system by signal; the control system includes a control circuit, and may also include a display screen or an alarm system. When the measured water flow speed exceeds the preset speed, the control system controls the alarm system to alarm; when the measured water flow speed does not exceed the preset speed, but is stable at a certain value for a long time, the control system prompts that there is leakage; when the measured water flow speed temporarily fluctuates, no alarm processing is performed.

[0027] The utility model discloses a water flow indicator which solves the technical problem of inaccurate detection data of water flow indicators in the prior art. When water flows in a pipeline, water enters from a water inlet and flows out from a water outlet. The water inlet impacts the impeller to rotate, thereby driving the rotating shaft to rotate, thereby driving the detection piece to rotate, and the detection device detects the number of times the detection piece passes through a unit time, thereby calculating the water flow velocity according to the impeller rotation speed, so that the measured water flow velocity is more accurate and can more accurately show whether the change in water flow velocity is caused by water seepage in the pipeline or unstable water pressure in the pipeline. In addition, the valve plate is changed into an impeller, so as to guide the water flow and avoid water pressure loss caused by water flow collision.

[0028] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A water flow indicator, characterized in that: It comprises a containing chamber (1), wherein a partition (2) is arranged in the containing chamber (1), and the partition (2) divides the containing chamber (1) into a sealed upper chamber (11) and a lower chamber (12); A trigger device (3) and a detection device are fixedly installed in the upper chamber (11), the trigger device (3) comprising a rotating shaft (31) rotatably installed on the partition (2), the lower end of the rotating shaft (31) extending into the lower chamber (12) and being installed with an impeller, the impeller rotating when impacted by the water flow in the lower chamber (12), the upper end of the rotating shaft (31) being located at one end of the upper chamber (11) and being provided with a detection piece (33); the detection device is used to detect the number of times the detection piece (33) passes through per unit time, and the detection device signal is connected to a control system; The lower chamber (12) is provided with a water inlet (13) and a water outlet (14) at both ends of the impeller.

2. A water flow indicator according to claim 1, characterized in that: A rotating wheel (34) is fixedly mounted on the upper end of the rotating shaft (31), and a plurality of detection pieces (33) are evenly arranged on the rotating wheel (34).

3. A water flow indicator according to claim 2, characterized in that: The detection device is a proximity switch, a photoelectric sensor or an infrared sensor.

4. A water flow indicator according to claim 1, characterized in that: The water inlet direction of the water inlet (13) is along the tangent direction of the impeller.

5. A water flow indicator according to claim 1, characterized in that: A mounting hole (21) is provided in the middle of the partition plate (2), the rotating shaft (31) is rotatably mounted in the mounting hole (21), and a rotary sealing structure is provided between the rotating shaft (31) and the mounting hole (21).

6. A water flow indicator according to claim 1, characterized in that: The bottom of the rotating shaft (31) is rotatably mounted on the bottom of the lower chamber (12), and the top of the rotating shaft (31) is rotatably mounted on the top of the upper chamber (11).

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