Proportioning type fuel gas and air mixing device

Abstract

The utility model relates to the technical field of fuel gas and air mixing, in particular to a proportioning type fuel gas and air mixing device which comprises a gas mixing tank, a power mechanism is arranged in the middle of the upper end of the gas mixing tank, a driving rod is arranged on the power mechanism, the upper end of the driving rod is fixedly connected with a driving gear in a sleeved mode, and the upper end of the driving gear is fixedly connected with a motor. And a transmission mechanism is arranged on the two sides of the driving gear. According to the utility model, the rotation of the two fan blades of the gas mixing tank can provide power, and negative pressure can be generated in the two gas guide hoods through the rotation of the two fan blades, so that gas in the gas mixing tank can be quickly sucked into the two gas guide hoods again; gas is conveyed into the two first gas distribution devices and the four second gas distribution devices through the two gas guide hoods and the two gas guide pipes to be evenly distributed at all positions in the gas mixing tank, gas mixing operation is achieved, fuel gas and air make full and even contact, and therefore the fuel gas and air mixing processing effect can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas and air mixing, in particular to a proportioning gas and air mixing device. Background Art

[0002] There are generally three types of urban gas: coal-to-gas, liquefied petroleum gas and natural gas (gas well gas, coalbed methane, biogas, oilfield associated gas). The calorific value of each type of gas is different, coal-to-gas has the lowest, natural gas is in the middle, and liquefied petroleum gas has the highest, and their combustion conditions are also different. Therefore, in order to make them replace each other, for example, high calorific value gas replaces low calorific value gas, it is necessary to mix the high calorific value gas with air. At present, there are three mixing methods in the gas industry: Venturi type, proportional type and follow-up flow type. Venturi type mixing has low cost but requires high gas inlet pressure and low outlet pressure; proportional mixing has low automation and high cost; follow-up flow type mixing can achieve automatic control but is more expensive.

[0003] The existing Chinese patent publication number is CN203620523U, which is a ratio-type gas and air mixing device. It consists of a gas pipeline, a compressed air pipeline, a mixed gas output pipeline and a control panel. The gas pipeline includes a gas inlet, a pneumatic shut-off valve a, a pressure regulator a, a regulating valve a, a rotor flowmeter and a valve a, and is provided with a pressure gauge; the compressed air pipeline includes a compressed air inlet, a pneumatic shut-off valve b, a pressure regulator b, a regulating valve b, a rotor flowmeter b and a valve b, and is provided with a pressure gauge; the mixed gas output pipeline includes a static mixer, a valve c and a mixed gas outlet, and is provided with a pressure gauge, a pressure transmitter and an oxygen content analyzer; the gas source of the pneumatic shut-off valve is taken from the compressed air pipeline, and the pneumatic shut-off valve, the pressure transmitter and the oxygen content analyzer are respectively connected to the control panel through wires. The advantages of the utility model are: the mixing device has a simple structure, high mixing accuracy and low cost; the proportional control is manual, the flow size is directly observed through the control panel, and the operation is convenient, which is particularly suitable for use in small flow conditions.

[0004] The gas guide structure in the existing gas mixing equipment cannot evenly transport the gas to all parts of the tank body, resulting in the gas not being able to fully contact evenly in the tank body, thereby reducing the mixing effect of the gas and air, so improvement is needed. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a proportional gas and air mixing device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A proportioning gas and air mixing device comprises a gas mixing tank, wherein a power mechanism is provided at the middle of the upper end of the gas mixing tank, a driving rod is provided on the power mechanism, a driving gear is fixedly sleeved at the upper end of the driving rod, and a transmission mechanism is provided on both sides of the driving gear;

[0008] The driving rod is arranged in the gas mixing tank, and the upper end of the driving rod is rotatably sleeved in the upper end of the gas mixing tank. Three fixed tubes are fixedly sleeved on the driving rod at equal intervals, and stirring paddles are arranged on both sides of the three fixed tubes. The driving gear is located in the gas mixing tank, and two air guide pipes are symmetrically arranged on the opposite inner walls of the gas mixing tank. The upper ends of the two air guide pipes are respectively provided with air guide covers, and the transmission mechanism is provided with two fan blades, and the two fan blades are respectively arranged in the two air guide covers. The lower ends of the two air guide pipes are installed with first air distribution devices, and the two first air distribution devices are respectively arranged on both sides of the lower end in the gas mixing tank, and two second air distribution devices are evenly installed on the opposite side of the two air guide pipes.

[0009] Compared with the prior art, the utility model can provide power for the rotation of the two fan blades of the gas mixing tank, and the rotation of the two fan blades can generate negative pressure in the two air guide hoods, so that the gas in the gas mixing tank can be quickly sucked into the two air guide hoods again, and the gas is transported to the two first gas distribution devices and the four second gas distribution devices through the two air guide hoods and the two air guide pipes, and is evenly distributed in various places in the gas mixing tank, so as to realize the gas mixing operation, make the gas and air fully and evenly contact, thereby improving the gas and air mixing processing effect.

[0010] Preferably, in order to provide power for the rotation of the driving rod, the power mechanism includes a fixing frame fixedly connected to the middle of the upper end of the mixing tank, a motor is fixedly installed in the fixing frame, and the output shaft end of the motor is fixedly connected to the upper end of the driving rod.

[0011] Preferably, in order to drive the two fan blades to rotate by rotating the driving rod, the transmission mechanism includes two transmission gears respectively meshed on both sides of the driving gear, the two transmission gears are respectively arranged above the two air guide covers, and a transmission rod is fixed to the middle part of the lower end of the two transmission gears, and the two fan blades are respectively fixedly sleeved on the lower ends of the two transmission rods.

[0012] Preferably, in order to support the lower ends of the two transmission rods and enable the two transmission rods to maintain smooth rotation during rotation, the lower ends of the two transmission rods are rotatably connected to a fixed plate, and the two fixed plates are each fixed with four fixed rods around a circle, and one end of the eight fixed rods is respectively fixedly connected to the inner wall of the two air guide covers.

[0013] Preferably, in order to fix the four second gas distribution devices and keep them stable during operation, the middle parts of the four second gas distribution devices are fixedly sleeved with second bearing rings, both sides of the four second bearing rings are fixed with second cross bars, one ends of the eight second cross bars are respectively fixedly connected to the opposite inner walls of the gas mixing tank, the upper ends of the two air guide tubes are fixedly sleeved with first bearing rings, one side of the two first bearing rings are fixed with first cross bars, and one ends of the two first cross bars are respectively fixedly connected to the opposite inner walls of the gas mixing tank.

[0014] Preferably, in order to achieve quantitative delivery of gas and air into the mixing tank for mixing processing, gas supply pipes with flow valves are provided on both sides of the upper end of the mixing tank, and two gas supply pipes with flow valves are respectively provided through the two air guide pipes, and a discharge pipe is provided through the middle of the lower end of the mixing tank, and a valve is installed on the discharge pipe.

[0015] Preferably, in order to prevent the gas mixing tank from being damaged due to excessive pressure in the gas mixing tank, a pressure gauge is provided on one side of the upper end of the gas mixing tank, a pressure safety valve is provided on the other side of the upper end of the gas mixing tank, and a visual window is provided on one side of the gas mixing tank.

[0016] The beneficial effects of the utility model are:

[0017] 1. Through the use of the transmission mechanism, the fan blades, the air guide pipe, the first gas distributor and the second gas distributor, the two fan blades can be driven to rotate during the mixing process of the gas and air in the gas mixing tank. The rotation of the two fan blades will generate negative pressure gas, and the gas and air in the gas mixing tank will be transported to the first gas distributor and the second gas distributor through the air guide pipe again. The gas can be evenly transported to various parts of the gas mixing tank through the first gas distributor and the second gas distributor, so that the gas and air can be fully and evenly contacted, which can improve the mixing effect of the gas and air in the gas mixing tank;

[0018] 2. Through the use of a power mechanism and a driving gear, the two fan blades can be rotated during the mixing process of the gas in the mixing tank. The rotation of the two fan blades can generate negative pressure, so that the gas in the mixing tank is quickly sucked into the air guide cover again. Therefore, one power device can provide power to two structures, which can effectively reduce the energy consumption of the mixing tank and reduce the operating cost of the mixing tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the gas mixing tank of the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the air guide cover of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the second bearing ring of the utility model.

[0023] In the figure: 1 a gas mixing tank, 2 a fixing frame, 3 a motor, 4 a driving rod, 5 a fixing pipe, 6 a stirring paddle, 7 a driving gear, 8 a transmission gear, 9 a transmission rod, 10 a fan blade, 11 an air guide cover, 12 a fixing plate, 13 a fixing rod, 14 an air guide pipe, 15 a first bearing ring, 16 a first cross bar, 17 a first air distribution device, 18 a second air distribution device, 19 a second bearing ring, 20 a second cross bar, 21 an air supply pipe with a flow valve, 22 a discharge pipe, 23 a valve, 24 a pressure gauge, 25 a pressure safety valve, and 26 a viewing window. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Reference Figure 1-4 The ratio-type gas and air mixing device comprises a gas mixing tank 1. Gas supply pipes 21 with flow valves are provided on both sides of the upper end of the gas mixing tank 1. The two gas supply pipes 21 with flow valves are respectively provided to penetrate the two air guide pipes 14, so that the gas and air can enter evenly. At the same time, the flow rate can be controlled by the gas supply pipes 21 with flow valves. With precise ratio-type mixing, the gas and air can be mixed and processed through the gas mixing tank 1. The gas and air can be transported into the air guide pipe 14 and evenly distributed into the gas mixing tank 1 through the two gas supply pipes 21 with flow valves. A discharge pipe 22 is provided in the middle of the lower end of the gas mixing tank 1. A valve 23 is installed on the discharge pipe 22. The valve 23 is connected to the matching parts for stable operation. The program can be set and the operation can be automatic. The valve 23 can The discharge pipe 22 is switched on and off, and the mixed gas and air in the mixing tank 1 can be discharged through the discharge pipe 22. A pressure gauge 24 is provided on one side of the upper end of the mixing tank 1, and a pressure safety valve 25 is provided on the other side of the upper end of the mixing tank 1. The pressure gauge 24 and the pressure safety valve 25 are both connected to supporting components for stable operation. The program can be set and the operation can be automatic. The pressure condition in the mixing tank 1 can be monitored through the pressure gauge 24. The gas in the mixing tank 1 can be discharged through the pressure safety valve 25 after the pressure in the mixing tank 1 exceeds the set pressure. At the same time, the pressure safety valve 25 is connected to the external pipeline, which can stably transport the gas to avoid overflow. A visual window 26 is provided on one side of the mixing tank 1, and the condition in the mixing tank 1 can be viewed through the visual window 26.

[0026] Reference Figure 1 , 2A power mechanism is provided at the middle part of the upper end of the mixing tank 1, and a driving rod 4 is provided on the power mechanism. The driving rod 4 is arranged in the mixing tank 1, and the upper end of the driving rod 4 is rotatably sleeved in the upper end of the mixing tank 1. Through the operation of the power mechanism, the driving rod 4 can be driven to rotate. The power mechanism includes a fixed frame 2 fixedly connected to the middle part of the upper end of the mixing tank 1, and a motor 3 is fixedly installed in the fixed frame 2. The end of the output shaft of the motor 3 is fixedly connected to the upper end of the driving rod 4. The fixed frame 2 can fix the motor 3 so that the motor 3 remains stable during operation. The motor 3 is connected to the supporting components for stable operation. The program can be set for automatic operation. The operation of the motor 3 will drive the driving rod 4 to rotate. Three fixed pipes 5 are fixedly sleeved at equal intervals on the driving rod 4. Stirring paddles 6 are arranged on both sides of the three fixed pipes 5. The rotation of the driving rod 4 will drive the three fixed pipes 5 to rotate, and the three fixed pipes 5 will drive the six stirring paddles 6 to operate. The operation of the six stirring paddles 6 will stir the gas and air in the mixing tank 1.

[0027] Reference Figure 2 , 3 Two air guide pipes 14 are symmetrically arranged on the opposite inner walls of the mixing tank 1. The upper ends of the two air guide pipes 14 are each provided with an air guide cover 11. The gas after the preliminary mixture of the fuel gas and the air can be transported to the air guide pipe 14 again through the air guide cover 11. The air guide pipe 14 can transport the gas to achieve the purpose of guiding the gas in the mixing tank 1 for mixing again. The upper ends of the two air guide pipes 14 are fixedly sleeved with a first bearing ring 15. One side of the two first bearing rings 15 is fixed with a first cross bar 16. One end of the two first cross bars 16 is respectively fixedly connected to the opposite inner walls of the mixing tank 1. The two first bearing rings 15 can be fixed by the two first cross bars 16. The two first bearing rings 15 can be used to fix the upper ends of the two air guide pipes 14. The driving rod 4 is fixed so that the two air guide pipes 14 and the two air guide covers 11 remain stable. The upper end of the driving rod 4 is fixedly sleeved with a driving gear 7, which is located in the mixing tank 1. A transmission mechanism is provided on both sides of the driving gear 7. The transmission mechanism is provided with two fan blades 10, and the two fan blades 10 are respectively arranged in the two air guide covers 11. When the driving rod 4 rotates, it will drive the driving gear 7 to rotate. The rotation of the driving gear 7 will provide power for the operation of the transmission mechanism. The operation of the transmission mechanism will drive the two fan blades 10 to rotate. The rotation of the two fan blades 10 will generate negative pressure in the two air guide covers 11, so that the gas and air preliminarily mixed in the mixing tank 1 are sucked into the air guide covers 11, and the air guide covers 11 will transport the gas to the air guide pipe 14 for mixing again.

[0028] Reference Figure 2 , 3The transmission mechanism includes two transmission gears 8 respectively meshed on both sides of the driving gear 7, and the two transmission gears 8 are respectively arranged above the two air guide covers 11. A transmission rod 9 is fixed to the middle part of the lower end of the two transmission gears 8, and the two fan blades 10 are respectively fixedly sleeved on the lower ends of the two transmission rods 9. The rotation of the driving rod 4 will drive the driving gear 7 to rotate, and the rotation of the driving gear 7 will push the two transmission gears 8 to rotate. The two transmission gears 8 will drive the two transmission rods 9 to rotate, and the rotation of the two transmission rods 9 will drive the two fan blades 10 to rotate. The rotation of the two fan blades 10 will generate negative pressure in the two air guide covers 11, so that the gas in the mixing tank 1 enters the two air guide covers 11, and the gas in the two air guide covers 11 will be transported to the two air guide pipes 14.

[0029] Reference Figure 2-4 , the lower ends of the two transmission rods 9 are rotatably connected with a fixed disk 12, and the two fixed disks 12 are fixed with four fixed rods 13 around one circle, and one end of the eight fixed rods 13 is respectively fixedly connected to the inner wall of one circle of the two air guide covers 11, and the two fixed disks 12 can be fixed by the eight fixed rods 13, and the two transmission rods 9 can be carried by the two fixed disks 12, so that the two transmission rods 9 can maintain stable rotation during rotation, and the lower ends of the two air guide pipes 14 are respectively installed with a first gas distribution device 17, and the two first gas distribution devices 17 are respectively arranged on both sides of the lower end of the mixing tank 1, and two second gas distribution devices 18 are evenly spaced and installed on the opposite side of the two air guide pipes 14, and a plurality of exhaust holes are arranged on the first gas distribution device 17 and the second gas distribution device 18, and the two air guide pipes 14 will The gas is transported to the four second gas distributors 18 and the two first gas distributors 17. The gas can be uniformly transported to the gas mixing tank 1 through the four second gas distributors 18 and the two first gas distributors 17 for uniform mixing. The middle parts of the four second gas distributors 18 are fixedly sleeved with second supporting rings 19, and the two sides of the four second supporting rings 19 are fixed with second cross bars 20. One ends of the eight second cross bars 20 are respectively fixedly connected to the relative inner walls of the gas mixing tank 1. The four second supporting rings 19 can be fixed by the eight second cross bars 20, and the four second gas distributors 18 can be fixed by the four second supporting rings 19, so that the four second gas distributors 18 are fixed in the gas mixing tank 1, and the four second gas distributors 18 can remain stable during operation.

[0030] In the utility model, when in use: the delivery flow is controlled by two gas supply pipes 21 with flow valves so as to accurately mix the gas and air into the gas mixing tank 1, and the motor 3 is controlled to operate by the supporting control device, the motor 3 drives the driving rod 4 to rotate, the driving rod 4 drives the three fixed pipes 5 to rotate, the three fixed pipes 5 drive the six stirring paddles 6 to operate, the operation of the six stirring paddles 6 will stir and mix the gas and air in the gas mixing tank 1, and at the same time the driving rod 4 will drive the driving gear 7 to rotate, the driving gear 7 drives the two transmission gears 8 to rotate, and the two The transmission gear 8 drives the two transmission rods 9 to rotate, and the two transmission rods 9 drive the two fan blades 10 to rotate. The rotation of the two fan blades 10 will generate negative pressure, so that the gas in the mixing tank 1 is sucked into the two air guide covers 11. The two air guide covers 11 respectively transport the gas to the two air guide pipes 14. The two air guide pipes 14 respectively transport the gas to the four second gas distribution devices 18 and the two first gas distribution devices 17. The four second gas distribution devices 18 and the two first gas distribution devices 17 transport the fuel gas and air to the mixing tank 1 so that the gas can be evenly mixed.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A proportional gas and air mixing device, comprising a gas mixing tank (1), characterized in that: A power mechanism is provided at the middle of the upper end of the gas mixing tank (1), a driving rod (4) is provided on the power mechanism, a driving gear (7) is fixedly sleeved on the upper end of the driving rod (4), and a transmission mechanism is provided on both sides of the driving gear (7); The driving rod (4) is arranged in the gas mixing tank (1), the upper end of the driving rod (4) is rotatably sleeved in the upper end of the gas mixing tank (1), three fixed tubes (5) are fixedly sleeved at equal intervals on the driving rod (4), and stirring paddles (6) are arranged on both sides of the three fixed tubes (5), the driving gear (7) is located in the gas mixing tank (1), two air guide tubes (14) are symmetrically arranged on opposite inner walls of the gas mixing tank (1), and the upper ends of the two air guide tubes (14) are each provided with an air guide cover (11), the transmission mechanism is provided with two fan blades (10), and the two fan blades (10) are respectively arranged in the two air guide covers (11), the lower ends of the two air guide tubes (14) are each provided with a first air distribution device (17), and the two first air distribution devices (17) are respectively arranged on both sides of the lower end of the gas mixing tank (1), and two second air distribution devices (18) are evenly spaced and installed on opposite sides of the two air guide tubes (14).

2. The proportional gas and air mixing device according to claim 1 is characterized in that: The power mechanism comprises a fixing frame (2) fixedly connected to the middle of the upper end of the gas mixing tank (1), a motor (3) is fixedly installed in the fixing frame (2), and the output shaft end of the motor (3) is fixedly connected to the upper end of the driving rod (4).

3. The proportioning gas and air mixing device according to claim 2 is characterized in that: The transmission mechanism comprises two transmission gears (8) respectively meshed on both sides of the driving gear (7); the two transmission gears (8) are respectively arranged above the two air guide covers (11); a transmission rod (9) is fixed to the middle of the lower ends of the two transmission gears (8); and the two fan blades (10) are respectively fixedly sleeved on the lower ends of the two transmission rods (9).

4. The proportioning gas and air mixing device according to claim 3 is characterized in that: The lower ends of the two transmission rods (9) are rotatably connected to a fixed disk (12), and the two fixed disks (12) are each fixed with four fixed rods (13) around their periphery. One end of the eight fixed rods (13) is respectively fixedly connected to the inner wall of the two air guide covers (11).

5. The proportional gas and air mixing device according to claim 4 is characterized in that: A second bearing ring (19) is fixedly sleeved at the middle of each of the four second gas distribution devices (18); a second cross bar (20) is fixedly mounted on both sides of each of the four second bearing rings (19); one end of each of the eight second cross bars (20) is fixedly connected to opposite inner walls of the gas mixing tank (1); the upper ends of each of the two gas guide tubes (14) are fixedly sleeved with a first bearing ring (15); one side of each of the two first bearing rings (15) is fixedly mounted with a first cross bar (16); one end of each of the two first cross bars (16) is fixedly connected to opposite inner walls of the gas mixing tank (1).

6. The proportioning gas and air mixing device according to claim 5 is characterized in that: Air supply pipes (21) with flow valves are provided through both sides of the upper end of the gas mixing tank (1), and the two air supply pipes (21) with flow valves are provided through the two air guide pipes (14) respectively. A discharge pipe (22) is provided through the middle of the lower end of the gas mixing tank (1), and a valve (23) is installed on the discharge pipe (22).

7. The proportioning gas and air mixing device according to claim 6 is characterized in that: A pressure gauge (24) is provided on one side of the upper end of the gas mixing tank (1), a pressure safety valve (25) is provided on the other side of the upper end of the gas mixing tank (1), and a visual window (26) is provided on one side of the gas mixing tank (1).

Images