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Water backflow preventing valve and water backflow preventing and gas leakage preventing automatic self-closing gas valve

A gas leakage prevention and automatic shutdown technology, applied to valve details, valve devices, engine components, etc., can solve the problems of complex structure and high energy consumption of gas automatic shutdown

Inactive Publication Date: 2010-12-22
张远忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the lack of waterproof backfill gas valve products currently on the market, the first technical problem to be solved by the present invention is to provide a waterproof backfill automatic shut-off for the front end of a household water heater with simple structure, convenient operation, and reliable anti-tap water backfill performance. Gas valve: Aiming at the disadvantages of complex structure and high energy consumption in the prior art, the second technical problem to be solved by the present invention is to provide a gas leakage detection and alarm device for the front end of a household water heater, which has a simple structure , Easy to operate, easy to disassemble and maintain, anti-tap water backflow, automatic gas shut-off performance reliable waterproof backflow, anti-gas leakage and automatic closing of the gas valve

Method used

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  • Water backflow preventing valve and water backflow preventing and gas leakage preventing automatic self-closing gas valve
  • Water backflow preventing valve and water backflow preventing and gas leakage preventing automatic self-closing gas valve
  • Water backflow preventing valve and water backflow preventing and gas leakage preventing automatic self-closing gas valve

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Experimental program
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Effect test

Embodiment 1

[0047] Example 1 see figure 1 , figure 2 , a waterproof and automatic closing gas valve, including a vertically installed valve body 1, the valve body 1 is an axially combined structure, and a valve cavity is arranged inside, the upper end of the valve cavity is the valve inlet end, and the lower end of the valve cavity is the valve outlet end, There is a valve core in the valve cavity, and a control valve rod 3 is provided on the valve body 1 to control the movement of the valve core. One end of the control valve rod 3 is located outside the valve body 1, and the other end of the control valve rod 3 is located in the valve cavity. The control valve The rod 3 is air-tightly connected to the middle of the valve body 1. The valve cavity is composed of an upper valve cavity 11, a middle control valve cavity 12 and a lower valve cavity 13. The barrier between the upper valve cavity 11 and the middle control valve cavity 12 An air inlet 14 connecting the two is provided on the to...

Embodiment 2

[0052] Embodiment 2 The structure of this embodiment is the same as that of Embodiment 1, the only difference being that the lower valve core 22 is made of one of ferrite-containing cast iron, cast steel, forged steel, carbon structural steel, and stainless iron. The lower valve core 22 generates a magnetic attraction force through its own material properties and the control magnet 31 of the control valve rod 3 .

Embodiment 3

[0053] Embodiment 3 see Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , a waterproof and anti-gas leakage automatic closing gas valve composed of the waterproof and automatic closing gas valve described in Embodiment 1, including a gas leakage alarm system, a control system, an electric drive system, and a DC power supply arranged outside the valve body E, limit device; the gas leakage alarm system includes a gas leakage detection alarm 51 that is provided with an alarm relay J; Point electrical connection, the incoming line and the normally open contact of the main terminal of the current relay J1 are respectively connected to the power supply E and the electric drive system, and the electric drive system is also connected to the power supply E; the limit device is a limit block or a limit stop One of the limit switches.

[0054] The electric drive system includes a DC push rod electromagnet D, a rotating handle 41, a U-shaped articulated fo...

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Abstract

The invention discloses a water backflow preventing automatic closing gas valve used at the front end of a water heater, which comprises a vertically installed valve body and a control valve rod. An upper valve plug and a lower valve plug are respectively installed on the upper part and the lower part of the control valve rod, and the upper valve plug and the control valve rod are both provided with magnetic steel. The repelling magnetic force between the upper valve plug and the control valve rod are greater than the weight of the upper valve plug, and the water discharge of the lower valve plug is greater than the weight thereof. The invention also discloses a water backflow preventing and gas leakage preventing automatic self-closing gas valve comprising the water backflow preventing valve. The gas valve is also provided with a gas leakage warning system, a control system, an electrical driving system, a DC power source and a stop device. The gas valve automatically closes gas during gas leakage and can automatically open or manually open gas after the leakage is eliminated. The invention has the advantages that the water backflow preventing automatic closing gas valve fills market vacancy and has simple structure, convenient operation and long service life; the water backflow preventing and gas leakage preventing automatic self-closing gas valve has convenient maintenance and low energy consumption.

Description

technical field [0001] The invention belongs to a gas valve, in particular to a waterproof backfilling and waterproof backfilling, gas leakage prevention and automatic closing gas valve for the front end of a household water heater. Background technique [0002] Gas is a fuel widely used in domestic and industrial applications, including natural gas and petroleum liquefied gas. In household applications, gas can not only be used in stoves for cooking and heating, but also as the only fuel for gas water heaters. Gas valve is indispensable in the gas supply system, especially plays an important role in the control and use safety of gas. After the gas supply system enters the family, a gas valve must be installed between the gas meter and the gas appliance to control the gas supply and ensure gas safety. Gas water heaters are widely used in areas where gas is used as household fuel. After the installation of gas water heaters, a trial combustion is usually carried out. The i...

Claims

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Application Information

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IPC IPC(8): F16K31/08F16K31/22
Inventor 周智宇
Owner 张远忠
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