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Backflow preventer

A technology of backflow preventer and check, which is applied in the direction of control valves, functional valve types, engine components, etc., and can solve the problems of no alarm structure, failure to find faults and maintenance in time

Pending Publication Date: 2019-10-15
德尔保定智能流体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing anti-backflow check is a simple single-layer prevention mechanism, and there is no corresponding alarm structure, so that the staff cannot find faults and repair them in time

Method used

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Examples

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Embodiment

[0018] figure 1 It is a schematic diagram of the internal structure of a backflow preventer of the present invention, figure 2 It is a top view of a backflow preventer of the present invention, image 3 It is a schematic diagram of the internal structure of the hydraulic control valve of the present invention, Figure 4 It is the schematic diagram of the circuit of the present invention, as shown in the figure, a backflow preventer includes a body 1, the two sides of the body 1 are respectively provided with a water inlet 11 and a water outlet 12, and the middle of the body 1 is fixed in turn with two check mechanisms 4, two The check mechanism 4 is respectively the first check mechanism 3 and the second check mechanism 2. The check mechanism 4 includes a valve plate 42, a fixed sleeve 41, a bracket 43 and a rebound spring 44. The rebound spring 44 is sleeved on the bracket 43. One end of the bracket 43 passes through the fixed plate, the other end of the bracket 43 is fixe...

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Abstract

The invention discloses a backflow preventer. The backflow preventer comprises a body. A first non-return mechanism and a second non-return mechanism are fixed to the middle of the body. An intermediate cavity is defined by the first non-return mechanism, the second non-return mechanism and the outer wall of the body. A detection mechanism is arranged on the body and comprises a pressure guide pipe, a hydraulic control valve and a water head loss sensor. One end of the pressure guide pipe communicates with the water inlet end of the body, and the other end of the pressure guide pipe communicates with the intermediate cavity through the hydraulic control valve. A protection valve is arranged at the water outlet end of the hydraulic control valve. The water head loss sensor is fixed in the intermediate cavity and is connected with a controller. The backflow preventer provided by the invention is simple in structure and is provided with the two independent non-return mechanisms, so that the backflow prevention effect is better; and meanwhile, the backflow preventer is provided with the detection mechanism, when backflow happens to the second non-return mechanism, backflow of liquid can be detected through the water head loss sensor, the controller gives an alarm, and the protection valve is opened at the same time.

Description

technical field [0001] The invention relates to a water supply device, in particular to a backflow preventer. Background technique [0002] The backflow preventer is a device that effectively prevents backflow of drinking water pipelines from polluting water sources. The existing anti-backflow check is a simple single-layer prevention mechanism, and there is no corresponding alarm structure, so that the staff cannot find faults and repair them in time. Contents of the invention [0003] The object of the present invention is to provide a backflow preventer with a simple structure and two independent check mechanisms, which have a better anti-backflow effect. At the same time, it has a detection mechanism. When the sensor detects the reverse flow of liquid, the controller will alarm and open the protection valve at the same time. [0004] In order to achieve the above object, the present invention provides a backflow preventer, which includes a body, the two sides of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K15/00F16K15/06F16K37/00
CPCF16K15/00F16K15/066F16K37/005
Inventor 陈根全赵江钊庄青义
Owner 德尔保定智能流体有限公司
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