Flow control valve

Abstract

The invention provides a flow control valve and belongs to the technical field of control valves. Through the flow control valve, the technical problems that the gas flow of an existing combustor is difficult to control and the combustor is not safe in use are solved. The flow control valve comprises a valve body and a front end cover. The outer surface of the valve body is provided with a gas inlet pipe, a gas outlet pipe and an ignition gas pipe. The valve body is internally provided with a spacer block. The spacer block is provided with a first through hole. The gas inlet pipe communicateswith a second containing cavity. The gas outlet pipe and the ignition gas pipe communicate with a first containing cavity. A valve element is arranged in the first containing cavity. The rear end of the valve element is provided with a shaft hole coaxial with the first through hole. The outer surface of the rear end of the valve element is provided with an ignition gas hole and a gas outlet hole communicating with the shaft hole. When the valve element rotates in the first containing cavity, the ignition gas pipe communicates with the ignition gas hole, and the gas outlet pipe communicates with the gas outlet hole. An ignition gas channel and a combustion gas channel supply gas respectively. When the ignition gas channel conducts ignition, the gas supply flow of the ignition gas channel isstable, the ignition efficiency is high, and the ignition process is safe.

Description

technical field [0001] The invention belongs to the technical field of control valves and relates to a flow control valve. Background technique [0002] The flow control valve is a valve that controls the flow of the orifice by changing the liquid resistance of the orifice under a certain pressure difference, thereby adjusting the movement speed of the actuator. It has a wide range of applications and is generally divided into gas flow control valves. with liquid flow control valve. [0003] Gas burners often use this flow control valve to control and adjust the gas flow of the burner, and achieve the purpose of igniting the burner or controlling the fire of the burner. The existing flow control valve includes a valve body and a valve body installed in the valve body. The valve core and the rotating shaft, the valve body is provided with an inlet hole and an air outlet hole, and the rotating shaft can adjust the valve core to guide the ignition and adjust the size of the fi...

AI Technical Summary

Problems solved by technology

[0003] Gas burners often use this flow control valve to control and adjust the gas flow of the burner, and achieve the purpose of igniting the burner or controlling the fire of the burner. The existing flow control valve includes a valve body and a valve body installed in the valve body. The valve core and the rotating shaft, the valve body is provided with an inlet hole and an air outlet hole, and the rotating shaft can adjust the valve core to guide the ignition and adjust the size of the fire. The control valve of this structure is called a two-way type The control valve of this kind of control valve controls the intake air and regulates the gas through a gas flow path at the same time. Although the control valve has a simple structure and is easy to use, it also has the following problems. The gas flow is integrated and synchronized, and the ignition and subsequent gas supply are completed through a gas supply channel. The gas flow during ignition is usually determined by the rotation angle of the shaft, and for different people, the rotation angle is different and cannot be better. If the rotation angle is too small, the gas flow rate is small, and it needs multiple ignitions to ignite, but the rotation angle is too large, the gas flow rate is large, and the fire will be larger immediately after the ignition is successful, which poses a greater threat to personal safety; 2. In use During the process, when the fire is adjusted, especially when the hour is adjusted, because the rotation of the shaft cannot be well grasped, the chamber causes the fire to go out, and after it goes out, it also needs to be ignited again; 3. The burner often pauses briefly during use. For the sake of safety, the burner is generally turned off when it stops. At this time, the unburned gas will be lost, and when it is used again, it needs to be re-ignited, and the gas needs to flow from the gas source to the ignition place again. While wasting gas, its use inconvenient

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