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Low-resistance backflow preventer

A backflow preventer and low-resistance technology, which is applied in the field of check valves, can solve problems such as pressure fluctuations at the front end of the valve, water quality backflow, poor sealing, etc., and achieve the effect of preventing backflow, preventing waste of water resources, and good sealing

Pending Publication Date: 2019-12-27
TONGLING XINGDA VALVE GENERAL FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the common backflow preventers will have poor sealing performance and water quality backflow phenomenon. At the same time, with the increase of the service life of the backflow preventer, some tight reinforcement positions will begin to loosen, and sometimes the pressure at the front end of the valve will fluctuate greatly. The above situation cause water leakage
Most of the products currently on the market are hard to avoid the above problems

Method used

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  • Low-resistance backflow preventer
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  • Low-resistance backflow preventer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as Figure 1-5 As shown, a low-resistance backflow preventer includes a valve body shell 1, one end of the valve body shell 1 is provided with a water inlet 2, the water inlet 2 is provided with a first valve seat 4, and the other end of the valve body shell 1 is provided with a The water outlet 3 is provided with a second valve seat 5 at the water outlet 3, and the middle position of the first valve seat 4 and the second valve seat 5 is horizontally provided with a support slide bar 6, and the support slide bar 6 is connected with the first valve seat 4 and the second valve seat 5. The two valve seats 5 are slidingly connected, the side of the supporting slide bar 6 close to the first valve seat 4 is fixed with a vertical water stop plate 7, and the side of the vertical water stop plate 7 close to the water inlet 2 is provided with an inlet pad 8, The surface of the inlet pad 8 is provided with an inlet pressure plate 9, and the side wall of the water inlet 2 is p...

Embodiment 2

[0030] Such as Figure 1-5 As shown, a low-resistance backflow preventer includes a valve body shell 1, one end of the valve body shell 1 is provided with a water inlet 2, the water inlet 2 is provided with a first valve seat 4, and the other end of the valve body shell 1 is provided with a The water outlet 3 is provided with a second valve seat 5 at the water outlet 3, and the middle position of the first valve seat 4 and the second valve seat 5 is horizontally provided with a support slide bar 6, and the support slide bar 6 is connected with the first valve seat 4 and the second valve seat 5. The two valve seats 5 are slidingly connected, the side of the supporting slide bar 6 close to the first valve seat 4 is fixed with a vertical water stop plate 7, and the side of the vertical water stop plate 7 close to the water inlet 2 is provided with an inlet pad 8, The surface of the inlet pad 8 is provided with an inlet pressure plate 9, and the side wall of the water inlet 2 is p...

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PUM

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Abstract

The invention provides a low-resistance backflow preventer, and relates to the field of check valves. The preventer comprises a valve body shell, wherein a water inlet is formed in one end of the valve body shell, a first valve seat is arranged at the water inlet, a water outlet is formed in the other end of the valve body shell, a second valve seat is arranged at the water outlet, a support sliding rod is arranged between the first valve seat and the second valve seat, a vertical water stop plate is arranged on the support sliding rod, an outlet pressing plate is arranged on one sides of a limiting plate, an outlet cover is installed at the tail end of the support sliding rod, and a horizontal water stop plate is arranged in the direction, away from the water outlet, on the circumferential side surface of the outlet cover. According to the preventer, through the arrangement of the vertical water stop plate and the horizontal water stop plate, the double-way sealing structure can wellprevent backflow, the vertical water stop plate is tightly combined with a sealing baffle through the arrangement of a large spring and a small spring, the horizontal water stop plate is tightly combined with the outlet pressing plate, and the preventer is simple in structure, can effectively avoid the phenomenon of water backflow, prevents waste of water resources, is safe and effective, and is high in practicability.

Description

technical field [0001] The invention relates to the field of check valves, in particular to a low-resistance backflow preventer. Background technique [0002] The backflow preventer is a new type of device that strictly restricts the water in the pipeline to flow in only one direction, developed according to the current water supply network in our country, especially when the backflow pollution of the drinking water pipeline is serious, and there is no effective device to prevent backflow pollution. Hydraulic controls. [0003] At present, the common backflow preventer will have poor sealing performance and water backflow phenomenon. At the same time, with the increase of the service life of the backflow preventer, some tight reinforcement positions will begin to loosen, and sometimes the pressure at the front end of the valve will fluctuate greatly. The above situation Both will cause water leakage. Most of the products currently on the market are difficult to avoid the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K15/06F16K1/44F16K11/10F16K15/18
CPCF16K15/066F16K1/44F16K11/10F16K15/18
Inventor 李洪圆
Owner TONGLING XINGDA VALVE GENERAL FACTORY