Gas burner

Abstract

An adjusting device for a gas burner comprises a distribution chamber, within which a static pressure chamber is formed. The distribution chamber is provided with a main vent connected to the static pressure chamber and several secondary vents. A sealing mechanism for sealing the secondary vents is installed on the distribution chamber. The sealing mechanism consists of a cylinder and a seal driven by the cylinder, which controls the switch of the secondary vents. The sealing mechanism is provided with a vent for releasing excess air volume. An air inlet connected to the static pressure chamber is provided on the distribution chamber, with the main vent always connected to the static pressure chamber. Compared to prior art, the seal is controlled by the cylinder to seal the secondary vents, thereby blocking the air intake for the corresponding combustion zone.

What is claimed is: 
     
         1 . A gas burner, comprising an air supply device, a distribution chamber, a gas valve assembly, a premixing device, a combustion channel and a water-cooled flame stabilizing device, wherein
 the distribution chamber comprises a static pressure chamber, a sealing mechanism, a main vent and a secondary vent, the main vent and the secondary vent connecting with the static pressure chamber;   the sealing mechanism is configured to independently control switch and air discharge of the secondary vent.   
     
     
         2 . The gas burner according to  claim 1 , wherein
 the gas burner comprises multiple gas valve assemblies, multiple premixing devices, and multiple combustion channels;   the distribution chamber comprises multiple sealing mechanisms and multiple secondary vents;   each of the multiple sealing mechanisms is configured to independently control switch and air discharge of each of the multiple secondary vents so that premixed gas be evenly distributed to multiple combustion channels; and   the gas valve assembly comprises multiple gas valve subassemblies.   
     
     
         3 . The gas burner according to  claim 1 , wherein
 the air supply device comprises a fan and an air regulating damper;   the gas valve assembly comprises a gas valve subassembly and a gas main pipe;   the premixing device comprises a mixer and a premixing chamber, wherein air and gas are mixed in the mixer to form a premixed gas;   the premixed gas is configured to enter the combustion channel to form combustion surface; and   the water-cooled flame stabilizing device comprises a water distribution chamber, a water-cooled flame stabilizing tube array, and a water collection chamber.   
     
     
         4 . The gas burner according to  claim 3 , wherein the gas valve subassembly comprises a filter, a pressure regulator valve, a gas shutoff valve, a gas regulating valve, a first actuator and a second actuator. 
     
     
         5 . The gas burner according to  claim 3 , wherein
 the water-cooled flame stabilizing device comprises a cooling tube array and a flame stabilizing tube array;   the cooling tube array consists of multiple cooling tubes arranged in a row with a first gap formed between adjacent cooling tubes, wherein the premixed gas burns after passing through the first gap; and   the flame stabilizing tube array consists of multiple flame stabilizing tubes arranged in a row with a second gap formed between adjacent flame stabilizing tubes, wherein a stable combustion flame is formed after passing through the second gap.   
     
     
         6 . The gas burner according to  claim 5 , wherein
 the cooling tube array, the flame stabilizing tube array, the water distribution chamber, and the water collection chamber are interconnected with water as internal medium; and   cross section shapes of the cooling tube array and the flame stabilizing tube array comprises one or more of cylindrical, rectangular and finned.   
     
     
         7 . The gas burner according to  claim 1 , wherein
 the sealing mechanism comprises a cylinder and a seal driven by the cylinder, wherein the seal controls on-off of the secondary vent;   the sealing mechanism is provided with an air release vent configured for discharging excess air volume;   the distribution chamber is provided with an air inlet connecting with the static pressure chamber; and   the main vent is always in connection with the static pressure chamber.   
     
     
         8 . The gas burner according to  claim 7 , wherein the sealing mechanism comprises a flange plate arranged on the distribution chamber, and the cylinder fixedly arranged on the flange plate. 
     
     
         9 . The gas burner according to  claim 8 , wherein the flange plate is provided with a guide rail configured for guiding the seal, and the guide rail is arranged in the static pressure chamber and extends to the secondary vent. 
     
     
         10 . The gas burner according to  claim 9 , wherein the flange plate is provided with a fixing element configured for securing the guide rail, and the guide rail passes through the fixing element. 
     
     
         11 . The gas burner according to  claim 9 , wherein the seal is fitted with a slider, the slider slidingly connecting with the guide rail, and the slider moves synchronously with the seal. 
     
     
         12 . The gas burner according to  claim 7 , wherein an output end of the cylinder is provided with a floating joint configured for controlling movement of the seal. 
     
     
         13 . The gas burner according to  claim 12 , wherein the seal is provided with a connector connected to the floating joint. 
     
     
         14 . The gas burner according to  claim 8 , wherein the air release vent comprises a first vent and a second vent formed on the flange plate, and the first vent and the second vent are respectively provided on opposite side of the cylinder. 
     
     
         15 . The gas burner according to  claim 14 , wherein the first vent is provided with an adjustment plate configured for adjusting size of the first vent. 
     
     
         16 . The gas burner according to  claim 14 , wherein the second vent is provided with a limit switch configured for transmitting signal that the seal has sealed the air release vent.