Self-adaptive combustor adjusting mechanism of natural gas boiler

Abstract

The invention relates to the technical field of natural gas boilers, in particular to a natural gas boiler self-adaptive combustor adjusting mechanism which comprises a pipe body, a first pressure stabilizing valve and a three-way overflow valve, the two ends of the pipe body are provided with a high-pressure port and a low-pressure port respectively, and an elastic diaphragm and a conduction assembly are arranged in the first pressure stabilizing valve; the three-way overflow valve comprises a shell and a valve element assembly, the shell is provided with a first air inlet, a second air inlet and an air outlet, and the valve element assembly is used for conducting connection between the first air inlet and the air outlet and between the second air inlet and the air outlet. The adjusting mechanism can stabilize the pressure of the gas pipeline, can compensate the gas at the low-pressure port when the gas is decompressed and exhausted, and is favorable for improving the stability of the air-fuel ratio of the burner in a boiler combustion chamber.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas boilers, and in particular to an adaptive burner regulating mechanism for a natural gas boiler. Background Art

[0002] Boiler burners are the most important auxiliary equipment for oil-fired and gas-fired boilers. They are mainly divided into oil-fired burners, gas-fired burners, and dual-fuel burners. Gas burners can be divided into natural gas burners, city gas burners, liquefied petroleum gas burners, and biogas burners.

[0003] The regulating mechanism for regulating natural gas pressure in a burner is typically a pressure-stabilizing valve, which typically has one inlet and two outlets. Installed on the gas supply pipeline, the pressure-stabilizing valve reduces the pressure of high-pressure gas in a high-pressure gas tank or pipeline and stabilizes it within a certain range.

[0004] When the boiler burner is started or the pressure in the pressure-stabilizing valve is high, the gas flow at the low-pressure port of the pressure-stabilizing valve will drop sharply when the pressure is reduced through the internal safety valve, which may easily lead to insufficient air-fuel ratio of the burner in the boiler combustion chamber, thereby reducing the gas utilization rate of the burner. Therefore, in view of these current situations, it is urgent to develop an adaptive burner adjustment mechanism for natural gas boilers to meet the needs of actual use. Summary of the Invention

[0005] The purpose of the present invention is to provide an adaptive burner adjustment mechanism for a natural gas boiler to solve the defect that the gas flow at the low-pressure port of the pressure-stabilizing valve suddenly decreases due to the air release and pressure reduction of the safety valve inside the pressure-stabilizing valve, thereby improving the stability of the air-fuel ratio of the burner in the boiler combustion chamber.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: A natural gas boiler adaptive burner adjustment mechanism includes a pipe body, a first pressure-stabilizing valve and a three-way relief valve, the two ends of the pipe body are respectively a high-pressure port and a low-pressure port, the end of the pipe body close to the high-pressure port is provided with an overflow port, and the end of the pipe body close to the low-pressure port is provided with a replenishing port, an elastic diaphragm and a conducting component are provided inside the first pressure-stabilizing valve, the first pressure-stabilizing valve is arranged at the top of the pipe body through the elastic diaphragm, the conducting component is arranged inside the pipe body, and the conducting component is used to conduction connect between the high-pressure port and the low-pressure port, the interior of the first pressure-stabilizing valve forms a movable decompression chamber through the elastic diaphragm, the top of the first pressure-stabilizing valve is also provided with a pressure relief port, the pressure relief port is conductively connected to the decompression chamber, the three-way relief valve includes a shell and a valve core assembly, the shell is provided with a first air inlet, a second air inlet and an air outlet, the first air inlet is conductively connected to the overflow port, the second air inlet is conductively connected to the pressure relief port, and the air outlet is conductively connected to the replenishing port, and the valve core assembly is used to conduction connect between the first air inlet and the second air inlet and the air outlet respectively.

[0007] In the above description, as a further solution, a connecting cavity is provided inside the shell, and the two ends of the connecting cavity are respectively connected to the first air inlet and the air outlet, and a glue valve is provided inside the connecting cavity. The glue valve can be movably arranged up and down inside the connecting cavity through the valve core assembly, and the glue valve is used to form a connecting and blocking structure between the first air inlet and the air outlet.

[0008] In the above description, as a further solution, an overflow channel is also provided inside the shell, one end of the overflow channel is connected to the second air inlet, and the other end of the overflow channel is connected to the air outlet, and a valve ring is provided at the end of the glue valve close to the second air inlet. The valve ring can move up and down with the glue valve in the shell, and the valve ring can cover the end of the overflow channel close to the second air inlet.

[0009] In the above description, as a further solution, the valve core assembly includes a valve stem and a third return spring, one end of the valve stem is connected to the end of the rubber valve close to the valve ring, and the third return spring is sleeved on the middle part of the valve stem, and the two ends of the third return spring are respectively in contact between the shell and the rubber valve.

[0010] In the above description, as a further solution, the conducting assembly includes a swing arm, a safety valve and an elastic member. The middle part of the safety valve passes through the elastic diaphragm and is fixedly connected to the middle part of the elastic diaphragm through the elastic member. The middle part of the swing arm is rotatably arranged inside the tube body. The inside of the tube body is also provided with an "L"-shaped channel. The "L"-shaped channel is used to conduct the high-pressure port and the low-pressure port, and one end of the swing arm is in contact with the end of the "L"-shaped channel, and the other end of the swing arm is connected to the end of the safety valve close to the tube body.

[0011] In the above description, as a further solution, the elastic member includes a first return spring and a second return spring, a valve plate is provided at one end of the safety valve close to the tube body, and a limit plate is provided at one end of the safety valve close to the decompression chamber. The safety valve is abutted against the bottom end surface of the elastic diaphragm through the valve plate. The first return spring is provided between the elastic diaphragm and the decompression chamber for resetting the elastic diaphragm, and the second return spring is provided between the elastic diaphragm and the limit plate for resetting the safety valve.

[0012] In the above description, as a further solution, an adjusting member is further provided on the top of the first pressure-stabilizing valve. The adjusting member can be located on the top of the first pressure-stabilizing valve and move up and down, and the bottom end of the adjusting member extends to the inside of the decompression chamber and contacts the elastic member.

[0013] In the above description, as a further solution, a manual closing valve is provided between the first air inlet and the high-pressure port of the three-way overflow valve, and a second pressure-stabilizing valve is provided between the air outlet and the low-pressure port of the three-way overflow valve. The structure of the second pressure-stabilizing valve is consistent with that of the first pressure-stabilizing valve.

[0014] In the above description, as a further solution, a one-way valve is further provided between the second air inlet and the pressure relief port of the three-way relief valve, and the flow direction of the one-way valve is to flow from the pressure relief port to the second air inlet.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: a three-way relief valve is arranged between the high-pressure port and the low-pressure port of the pipe body, and the pressure relief port of the first pressure-stabilizing valve is connected to the three-way relief valve. When the first pressure-stabilizing valve is rapidly decompressed, the gas pressure at the pressure relief port is used to drive the valve core assembly to open. At this time, the first air inlet and the second air inlet are respectively connected to the air outlet, and the gas flow rate of the low-pressure port of the pipe body can be supplemented. This regulating mechanism can stabilize the pressure of the gas pipeline, and can also compensate the low-pressure port for gas while the gas pressure is relieved and exhausted, which is beneficial to improving the stability of the air-fuel ratio of the burner in the boiler combustion chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a natural gas boiler adaptive burner adjustment mechanism according to the present invention; Figure 2 Schematic diagram of the internal structure of the first pressure-stabilizing valve in the present invention; Figure 3 Schematic diagram of the internal structure of the three-way relief valve of the present invention; Figure 4 This is a schematic diagram of the gas compensation principle of the adaptive burner adjustment mechanism of a natural gas boiler according to the present invention; In the figure: 1-tube body, 11-high pressure port, 12-low pressure port, 13-overflow port, 14-supplement port, 15-"L"-shaped channel, 2-first pressure-stabilizing valve, 21-elastic diaphragm, 22-decompression chamber, 23-first return spring, 24-second return spring, 25-adjusting member, 26-swing arm, 27-safety valve, 271-valve plate, 272-limiting plate, 28-pressure relief port, 3-check valve, 4-three-way overflow valve, 41-first air inlet, 42-second air inlet, 43-air outlet, 44-connecting cavity, 45-rubber valve, 46-valve ring, 47-overflow channel, 48-valve stem, 49-third return spring, 40-housing, 5-manual closing valve, 6-second pressure-stabilizing valve. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] For this example, please refer to Figures 1-4 , a natural gas boiler adaptive burner adjustment mechanism specifically implemented, including a pipe body 1, a first pressure-stabilizing valve 2 and a three-way relief valve 4, the two ends of the pipe body 1 are respectively a high-pressure port 11 and a low-pressure port 12, the end of the pipe body 1 close to the high-pressure port 11 is provided with an overflow port 13, the end of the pipe body 1 close to the low-pressure port 12 is provided with a replenishment port 14, the interior of the first pressure-stabilizing valve 2 is provided with an elastic diaphragm 21 and a conduction component, the first pressure-stabilizing valve 2 is arranged on the top of the pipe body 1 through the elastic diaphragm 21, the conduction component is arranged inside the pipe body 1, and the conduction component is used to conduct between the high-pressure port 11 and the low-pressure port 12. 2 forms a movable decompression chamber 22 through an elastic diaphragm 21. A pressure relief port 28 is further provided on the top of the first pressure-stabilizing valve 2, and the pressure relief port 28 is conductively connected to the decompression chamber 22. The three-way relief valve 4 includes a shell 40 and a valve core assembly. The shell 40 is provided with a first air inlet 41, a second air inlet 42 and an air outlet 43. The first air inlet 41 is conductively connected to the overflow port 13, the second air inlet 42 is conductively connected to the pressure relief port 28, and the air outlet 43 is conductively connected to the replenishment port 14. The valve core assembly is used to conduct the first air inlet 41 and the second air inlet 42 with the air outlet 43 respectively.

[0019] Specifically, such as Figure 3As shown, a connecting cavity 44 is provided inside the shell 40, and the two ends of the connecting cavity 44 are respectively connected to the first air inlet 41 and the air outlet 43, and a glue valve 45 is provided inside the connecting cavity 44. The glue valve 45 is arranged inside the connecting cavity 44 so as to be movable up and down through a valve core assembly. The glue valve 45 is used to form a connecting and blocking structure between the first air inlet 41 and the air outlet 43. An overflow channel 47 is also provided inside the shell 40, and one end of the overflow channel 47 is connected to the second air inlet 42, and the other end of the overflow channel 47 is connected to the air outlet 43. A valve ring 46 is provided at one end of the glue valve 45 close to the second air inlet 42, and the valve ring 46 can move up and down following the glue valve 45 in the shell 40, and the valve ring 46 can cover the end of the overflow channel 47 close to the second air inlet 42.

[0020] Specifically, such as Figure 3 As shown, the valve core assembly includes a valve stem 48 and a third return spring 49. One end of the valve stem 48 is connected to the end of the glue valve 45 near the valve ring 46, and the third return spring 49 is sleeved on the middle of the valve stem 48. The two ends of the third return spring 49 respectively abut between the housing 40 and the glue valve 45. The gas exhausted from the pressure relief port 28 can enter the second air inlet 42, so that the valve ring 46 drives the glue valve 45 upward under the action of the gas pressure. At this time, the second air inlet 42 and the air outlet 43 are connected through the overflow channel 47, and the first air inlet 41 and the air outlet 43 are connected, so that the exhaust gas is directed to the low-pressure port 12 of the pipe body 1 to compensate for the gas flow.

[0021] Specifically, such as Figure 2 As shown, the conducting assembly includes a swing arm 26, a safety valve 27 and an elastic member. The middle part of the safety valve 27 passes through the elastic diaphragm 21 and is fixedly connected to the middle part of the elastic diaphragm 21 through the elastic member. The middle part of the swing arm 26 is rotatably arranged inside the tube body 1. The interior of the tube body 1 is also provided with an "L"-shaped channel 15. The "L"-shaped channel 15 is used to conduct the high-pressure port 11 and the low-pressure port 12, and one end of the swing arm 26 is in contact with the end of the "L"-shaped channel 15, and the other end of the swing arm 26 is connected to the end of the safety valve 27 close to the tube body 1.

[0022] Specifically, such as Figure 2As shown, the elastic member includes a first return spring 23 and a second return spring 24. A valve plate 271 is provided at the end of the safety valve 27 near the tube body 1, and a limit plate 272 is provided at the end of the safety valve 27 near the decompression chamber 22. The safety valve 27 abuts against the bottom end surface of the elastic diaphragm 21 through the valve plate 271. The first return spring 23 is disposed between the elastic diaphragm 21 and the decompression chamber 22 to reset the elastic diaphragm 21. The second return spring 24 is disposed between the elastic diaphragm 21 and the limit plate 272 to reset the safety valve 27. When the gas pressure at the low-pressure port 12 is too high, the elastic diaphragm 21 will move upward and squeeze the second return spring 24, causing the valve plate 271 to separate from the elastic diaphragm 21. At this time, the gas can enter the decompression chamber 22 and be exhausted to the pressure relief port 28.

[0023] Specifically, such as Figure 2 As shown, the top of the first pressure-stabilizing valve 2 is also provided with an adjusting member 25. The adjusting member 25 is positioned at the top of the first pressure-stabilizing valve 2 and can move up and down. The bottom end of the adjusting member 25 extends into the interior of the pressure-reducing chamber 22, where it abuts against the elastic member. The adjusting member 25 is typically threaded onto the top of the first pressure-stabilizing valve 2. By adjusting the height of the adjusting member 25 above the top of the first pressure-stabilizing valve 2, the length of the first return spring 23 can be varied, adjusting its elastic stress and thus the deformation amplitude of the elastic diaphragm 21.

[0024] In a further embodiment, a manual closing valve 5 is provided between the first air inlet 41 of the three-way relief valve 4 and the high-pressure port 11, and a second pressure-stabilizing valve 6 is provided between the air outlet 43 of the three-way relief valve 4 and the low-pressure port 12. The structure of the second pressure-stabilizing valve 6 is consistent with that of the first pressure-stabilizing valve 2. The one-way valve 3 is provided to reduce the high-pressure gas at the overflow port 13, preventing the added gas pressure from being too high, which would cause the gas pressure at the low-pressure port 12 in the pipe body 1 to be too high.

[0025] In a further embodiment, a one-way valve 3 is further provided between the second air inlet 42 of the three-way relief valve 4 and the pressure relief port 28. The flow direction of the one-way valve 3 is to flow from the pressure relief port 28 to the second air inlet 42. The purpose of providing the one-way valve 3 is that when the three-way relief valve 4 is opened, the first air inlet 41, the second air inlet 42 and the air outlet 43 are in a conductive structure. By providing the one-way valve 3, the high-pressure gas at the first air inlet 41 can be effectively prevented from flowing back into the decompression chamber 22 of the first pressure-stabilizing valve 2 through the second air inlet 42.

[0026] The present application provides an adaptive burner adjustment mechanism for a natural gas boiler, which is arranged between the high-pressure port 11 and the low-pressure port 12 of the pipe body 1 through a three-way relief valve 4, and the pressure relief port 28 of the first pressure-stabilizing valve 2 is connected to the three-way relief valve 4. When the first pressure-stabilizing valve 2 is rapidly decompressed, the gas pressure at the pressure relief port 28 is used to drive the valve core assembly to open. At this time, the first air inlet 41 and the second air inlet 42 are respectively connected to the air outlet 43, which can compensate for the gas flow of the low-pressure port 12 of the pipe body 1. This adjustment mechanism can stabilize the pressure of the gas pipeline, and can also compensate for the gas flow of the low-pressure port 12 while the gas pressure is relieved and exhausted, which is beneficial to improving the stability of the air-fuel ratio of the burner in the boiler combustion chamber.

[0027] The working principle of a natural gas boiler adaptive burner adjustment mechanism, such as Figure 4 As shown, the right side is a schematic diagram of the natural gas supply of the regulating mechanism in a stable pressure state. Since the gas pressure in the pipe body 1 tends to be in a stable range, the elastic diaphragm 21 cannot release gas into the decompression chamber 22, and the second air inlet 42 in the three-way relief valve 4 cannot push the glue valve 45 to open. At this time, the first air inlet 41 and the second air inlet 42 are blocked from the air outlet 43, and gas compensation cannot be performed on the low-pressure port 12 in the pipe body 1. The left side is a schematic diagram of the natural gas supply of the regulating mechanism in a stable pressure state. Since the gas pressure in the pipe body 1 is too high, the elastic diaphragm 21 needs to be deflated into the decompression chamber 22, so that the second air inlet 42 in the three-way relief valve 4 can be injected with gas to push the rubber valve 45, so that the first air inlet 41 and the second air inlet 42 are in a conductive state with the air outlet 43, and gas compensation can be performed at the low-pressure port 12 in the pipe body 1.

[0028] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all of these should be considered as the scope of protection of the present invention.

Claims

1. A natural gas boiler adaptive burner adjustment mechanism, characterized in that: include: A pipe body, wherein the two ends of the pipe body are respectively a high-pressure port and a low-pressure port, an overflow port is provided at the end of the pipe body close to the high-pressure port, and a replenishment port is provided at the end of the pipe body close to the low-pressure port; a first pressure-stabilizing valve, wherein an elastic diaphragm and a conducting component are provided inside the first pressure-stabilizing valve, the first pressure-stabilizing valve is arranged on the top of the tube body through the elastic diaphragm, the conducting component is arranged inside the tube body, and the conducting component is used to conduct between the high-pressure port and the low-pressure port, the interior of the first pressure-stabilizing valve forms a movable decompression chamber through the elastic diaphragm, and a pressure relief port is further provided on the top of the first pressure-stabilizing valve, and the pressure relief port is conductively connected to the decompression chamber; A three-way relief valve includes a shell and a valve core assembly. The shell is provided with a first air inlet, a second air inlet and an air outlet. The first air inlet is conductively connected to the overflow port, the second air inlet is conductively connected to the pressure relief port, and the air outlet is conductively connected to the replenishment port. The valve core assembly is used to conductively connect the first air inlet and the second air inlet to the air outlet respectively.

2. The adaptive burner adjustment mechanism for a natural gas boiler according to claim 1, characterized in that: A connecting cavity is provided inside the shell, and the two ends of the connecting cavity are respectively connected to the first air inlet and the air outlet, and a glue valve is provided inside the connecting cavity. The glue valve can be movably arranged up and down inside the connecting cavity through a valve core assembly. The glue valve is used to form a connecting and blocking structure between the first air inlet and the air outlet.

3. The adaptive burner adjustment mechanism for a natural gas boiler according to claim 2, characterized in that: An overflow channel is also provided inside the shell, one end of the overflow channel is conductively connected to the second air inlet, and the other end of the overflow channel is conductively connected to the air outlet. A valve ring is provided at one end of the glue valve close to the second air inlet. The valve ring can move up and down with the glue valve in the shell, and the valve ring can cover the end of the overflow channel close to the second air inlet.

4. The adaptive burner adjustment mechanism for a natural gas boiler according to claim 3, characterized in that: The valve core assembly includes a valve stem and a third return spring. One end of the valve stem is connected to an end of the rubber valve close to the valve ring, and the third return spring is sleeved on the middle part of the valve stem. The two ends of the third return spring are respectively in contact between the shell and the rubber valve.

5. The adaptive burner adjustment mechanism for a natural gas boiler according to claim 1, characterized in that: The conducting assembly includes a swing arm, a safety valve and an elastic member. The middle part of the safety valve penetrates the elastic diaphragm and is fixedly connected to the middle part of the elastic diaphragm through the elastic member. The middle part of the swing arm is rotatably arranged inside the tube body. The inside of the tube body is also provided with an "L"-shaped channel. The "L"-shaped channel is used to conduct the high-pressure port and the low-pressure port, and one end of the swing arm is in contact with the end of the "L"-shaped channel, and the other end of the swing arm is connected to the end of the safety valve close to the tube body.

6. The adaptive burner adjustment mechanism for a natural gas boiler according to claim 5, characterized in that: The elastic member includes a first return spring and a second return spring. A valve plate is provided at one end of the safety valve close to the tube body, and a limit plate is provided at one end of the safety valve close to the decompression chamber. The safety valve abuts against the bottom end surface of the elastic diaphragm through the valve plate. The first return spring is provided between the elastic diaphragm and the decompression chamber for resetting the elastic diaphragm. The second return spring is provided between the elastic diaphragm and the limit plate for resetting the safety valve.

7. The adaptive burner adjustment mechanism for a natural gas boiler according to claim 6, characterized in that: An adjusting member is further provided on the top of the first pressure-stabilizing valve. The adjusting member can be located on the top of the first pressure-stabilizing valve and move up and down, and the bottom end of the adjusting member extends into the interior of the decompression chamber to contact the elastic member.

8. The adaptive burner adjustment mechanism for a natural gas boiler according to any one of claims 1 to 7, characterized in that: A manual closing valve is also provided between the first air inlet and the high-pressure port of the three-way relief valve, and a second pressure-stabilizing valve is also provided between the air outlet and the low-pressure port of the three-way relief valve. The structure of the second pressure-stabilizing valve is consistent with that of the first pressure-stabilizing valve.

9. The adaptive burner adjustment mechanism for a natural gas boiler according to claim 8, characterized in that: A one-way valve is further provided between the second air inlet and the pressure relief port of the three-way relief valve, and the flow direction of the one-way valve to the pressure relief port flows toward the second air inlet.

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