CN210218888U

CN210218888U - On-line monitoring backflow preventer

Info

Publication number: CN210218888U
Application number: CN201920746929.7U
Authority: CN
Inventors: Rui He; 何锐; He Yang; 杨贺; Zishan Jiang; 江子山
Original assignee: Zhejiang Bannige Fluid Control Co Ltd
Current assignee: Zhejiang Bannige Fluid Control Co Ltd
Priority date: 2019-05-23
Filing date: 2019-05-23
Publication date: 2020-03-31
Anticipated expiration: 2029-05-23

Abstract

The utility model provides an on-line monitoring backflow preventer, including one-level check valve, second grade check valve and sluicing valve, one-level check valve and second grade check valve connect gradually, the external sluicing valve that has of middle cavity between one-level check valve, the second grade check valve, still include backflow indicator, leak hunting sensor, backflow indicator installs on the casing of second grade check valve, leak hunting sensor installs in the exit end of sluicing valve. Through the leak detection sensor who increases the outlet of drain valve to and the refluence indicator, through the signal feedback of sensor, can accurately differentiate valve work in real time and whether normal, and the sluicing condition, reflect in real time, prevent extravagant medium for a long time.

Description

On-line monitoring backflow preventer

[ technical field ] A method for producing a semiconductor device

The utility model relates to a technical field of relief valve, especially an on-line monitoring backflow preventer.

[ background of the invention ]

The backflow preventer is mainly used for urban water supply systems, is installed and applied to inlets of secondary water supply systems, air conditioning water systems, fire water systems and the like, is a hydraulic control assembly which strictly limits that pressure water in a pipeline can only flow in one direction, and has the functional requirements of absolutely preventing media in the pipeline from flowing backwards under any working condition so as to achieve the purpose of preventing backflow pollution. The existing backflow preventer is composed of two independent check valves and a water drain valve, and because the backflow preventer is mostly installed in places such as a trench and a valve well, the valve functions are normal, but long-time water leakage caused by abnormal working conditions and damage of the valve cause abnormal long-time water drain, media in a pipe network are seriously wasted, and the online monitoring backflow preventer is provided.

[ Utility model ] content

The utility model discloses an aim at solving the problem among the prior art, provide an on-line monitoring backflow preventer, can the real-time supervision valve operation conditions, reflect the sluicing condition, prevent the extravagant medium for a long time.

In order to realize the above purpose, the utility model provides an on-line monitoring backflow preventer, including one-level check valve, second grade check valve and drain valve, one-level check valve and second grade check valve connect gradually, middle cavity between one-level check valve, the second grade check valve is external to have the drain valve, still includes backflow indicator, leak detection sensor, backflow indicator installs on the casing of second grade check valve, leak detection sensor installs in the exit end of drain valve.

Preferably, the backflow indicator is connected with the alarm unit through the control module.

Preferably, the leak detection sensor is connected with the alarm unit through the control module.

The utility model has the advantages that: the utility model discloses an increase the leak detection sensor of outlet of sluicing valve to and the indicator that flows backwards, through the signal feedback of sensor, can accurately differentiate valve work in real time whether normal, and the sluicing condition, reflect in real time, prevent the extravagant medium for a long time.

The features and advantages of the present invention will be described in detail by embodiments with reference to the accompanying drawings.

[ description of the drawings ]

Fig. 1 is a schematic structural view of an on-line monitoring backflow preventer of the present invention.

[ detailed description ] embodiments

Refer to fig. 1 the utility model relates to an on-line monitoring backflow preventer, including one-level check valve 1, second grade check valve 2 and drain valve 3, one-level check valve 1 and second grade check valve 2 connect gradually, the middle cavity between one-level check valve 1, the second grade check valve 2 is hung outward has drain valve 3, still includes backflow indicator 4, leak detection sensor 5, backflow indicator 4 installs on second grade check valve 2's casing, leak detection sensor 5 installs in the exit end of drain valve 3. And the backflow indicator 4 is connected with the alarm unit through the control module. The leak detection sensor 5 is connected with an alarm unit through a control module.

The utility model relates to an on-line monitoring backflow preventer's theory of operation:

the water is led in the positive direction, when the inlet pressure is greater than the outlet pressure, the two check valve clacks are opened, and the water drain valve is closed.

And when the inlet pressure is less than or equal to the outlet pressure, the two check valve clacks are closed, and the water drain valve is opened. If no garbage is blocked, the two check valve clacks are sealed and closed, the middle cavity is communicated with the atmosphere, the pressure of the middle cavity is zero, and the outlet of the water drain valve does not drain.

And when the inlet pressure is smaller than the outlet pressure, the two check valve clacks are both in a closed state, the water release valve is in an open state, if the valve port of one or two check valve clacks is blocked by garbage to generate leakage, leaked media directly flow to the middle cavity through the water release valve and are discharged out of the valve, and the backflow pollution to the inlet end is prevented.

A leak detection sensor is added at the outlet of the drain valve, and a backflow indicator is added on the secondary check valve:

1. when the backflow indicator 4 detects medium backflow and the leak detection sensor 5 detects water leakage, a leakage fault occurs in the secondary check valve;

2. when the backflow indicator 4 detects that no medium flows backwards, the leak detection sensor 5 detects that water leaks, and then the reaction drain valve has a leakage fault;

3. when the backflow indicator 4 detects medium backflow and the leak detection sensor 5 detects no water leakage, leakage faults occur in both the first-stage check valve and the second-stage check valve, which indicates that the backflow valve preventer fails, a backflow accident occurs, and emergency treatment is required;

therefore, through signal feedback of the sensor, whether the valve works normally or not can be accurately judged in real time, and water drainage and water leakage conditions can be reflected in real time, so that long-term medium waste is prevented.

The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.

Claims

1. The utility model provides an on-line monitoring backflow preventer, includes one-level check valve (1), second grade check valve (2) and outlet valve (3), one-level check valve (1) and second grade check valve (2) connect gradually, intermediate chamber between one-level check valve (1), second grade check valve (2) has been hung outlet valve (3), its characterized in that outward: still include backflow indicator (4), leak detection sensor (5), backflow indicator (4) are installed on the casing of second grade check valve (2), leak detection sensor (5) are installed in the exit end of outlet valve (3).

2. An on-line monitoring backflow preventer as claimed in claim 1, wherein: the backflow indicator (4) is connected with the alarm unit through the control module.

3. An on-line monitoring backflow preventer as claimed in claim 1 or 2, wherein: and the leak detection sensor (5) is connected with the alarm unit through the control module.