CN106949331A - Gas flow angle detecting threeway - Google Patents

Abstract

The present invention discloses a kind of gas flow angle detecting threeway, including pedestal, the pedestal is welded to threeway one end outlet side, and rotary indicator fixing end is fixed on base interior, base interior is fixed with slide rheostat, and pedestal external stability has power input and current output terminal；Power input external power supply, is inscribed slide rheostat, and slide rheostat is inscribed in current output terminal.In pipe during gas flowing, rotary indicator skew so that the resistance value of slide rheostat changes, and then output current changes, gas flowing is faster in pipe, and pressure is higher, change is more obvious, can determine to manage direction and the size of interior gas by the size of curent change.

Description

Gas flow direction detection tee

technical field

The invention relates to a three-way connecting valve, in particular to a three-way which can detect the direction and size of gas flow.

Background technique

Gas (natural gas, coal gas) is the main source of heat for our daily cooking, but the safety of gas has always been a problem that we cannot ignore. Once it leaks, there are many dangers, and the most prone to problems are the pipes that enter the home and use them. Gas leak detection has always been the focus of research on safe gas use, but the biggest problem in detecting gas leaks through pressure changes is that it is impossible to distinguish between normal gas use and gas leaks.

Contents of the invention

The object of the present invention is to address the above-mentioned shortcomings, and provide a tee that can detect the direction of gas flow, and then distinguish whether the pressure drop in the pipe is normal gas use or gas leakage.

The technical solution of the present invention is: gas flow direction detection tee, including a base, the base is fixed to the outlet side of one end of the tee, the fixed end of the rotating pointer is fixed inside the base, a sliding rheostat is fixed inside the base, the base A power input terminal and a current output terminal are fixed externally; the power input terminal is externally connected to a power supply, internally connected to a sliding rheostat, and the current output terminal is internally connected to a sliding rheostat.

The base is fixedly connected to the tee by welding, and the power supply is a battery, which can be a separate battery or a battery provided by the gas equipment; the gas equipment is a gas cooker or a gas water heater.

Beneficial effects: when the gas in the tube flows, the rotating pointer shifts, causing the resistance value of the sliding rheostat to change, and then the output current changes. The faster the gas flows in the tube, the higher the pressure, the more obvious the change. The size of the change in the current can determine the The direction and size of the gas.

Description of drawings

Fig. 1 is a schematic diagram of the overall installation structure of the present invention;

Fig. 2 is a schematic diagram of a partially enlarged structure of the present invention;

Among them: 1 power input terminal; 2 current output terminal; 3 sliding rheostat; 4 rotating pointer; 5 base; 6 gas flow direction detection tee; 7 gas cooker; 8 battery.

detailed description

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Embodiment 1: As shown in Figure 1 and Figure 2: the gas flow direction detection tee, the base end is connected to the gas cooker inlet, the other two ports are connected to the gas inlet, and the other is connected to the leakage detection inlet, and the gas cooker battery It is electrically connected with the base power input terminal. The rotating pointer is made of metal and contacts the sliding rheostat 3 , and the rotating pointer moves to different positions to change the resistance output of the sliding rheostat 3 .

The basic principle of the present invention is to change the effective value of the sliding rheostat by using the blocked offset of the rotating pointer, and then change the output current. The resistance value of the sliding rheostat is selected according to the measurement accuracy. In this embodiment, a resistor with a variation range of 150-50 ohms is selected.

When stationary, the resistance output corresponding to the position of the rotating pointer is 75 ohms, and the corresponding current is 20mA. When in use, the gas cooker is turned on, the gas flows at the base end of the tee, and the rotating pointer deviates along the direction of gas flow. The shifting of the rotating pointer makes the effective resistance of the sliding rheostat Change, when the input voltage (gas cooker battery voltage 1.5V) remains unchanged, the output current varies from 10-30mA, where 10-20mA and 20-30mA represent two directions respectively, obtain the changed current, and then carry out the gas flow Judgment of size and direction.

Example 2: The gas flow direction detection tee, the base end is connected to the gas water heater inlet, the other two ports are connected to the gas inlet, and the other is connected to the leakage detection inlet, the gas water heater battery and the base power input port are electrically connected. If the location of the gas water heater battery is inconvenient to connect, the battery can be connected separately.

It should be noted that this application can also detect whether the water pipe is leaking, as long as the above principles are met, it can be detected, and it is applicable to gas and liquid.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments, and that described in the above-mentioned embodiments and the specification only illustrates the principles of the present invention, and the present invention may further be described without departing from the spirit and scope of the present invention. There are various changes and improvements which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (4)

1. The gas flow direction detection tee is characterized by: including a base (5), the base is fixed to the outlet side of one end of the tee, the fixed end of the rotating pointer (4) is fixed inside the base, and the base is fixed with a The sliding rheostat (3) has a power input terminal (1) and a current output terminal (2) fixed on the outside of the base; the power input terminal is externally connected to a power supply, internally connected to a sliding rheostat, and internally connected to a sliding rheostat, and the current output terminal is internally connected to a sliding rheostat. 2. The gas flow direction detection tee according to claim 1, characterized in that the base is fixedly connected to the tee by welding. 3. The gas flow direction detection tee according to claim 1, characterized in that the power supply is a battery, which can be a separate battery or a battery that comes with the gas equipment. 4. The gas flow direction detection tee according to claim 1, wherein the gas equipment is a gas cooker or a gas water heater.