Flow monitoring and adjusting device for natural gas and air conveying of heat accumulating type trolley heating furnace

Abstract

The utility model relates to the technical field of metallurgical and mechanical heat accumulating type trolley heating furnaces, in particular to a flow monitoring and adjusting device for conveying natural gas and air for a heat accumulating type trolley heating furnace, which comprises a pull rod, a gas hood fixedly connected to one end of the pull rod, a piston fixedly connected to the other end of the pull rod, and an air hole arranged on the surface of the gas hood and positioned in an exhaust pipe, the inner wall of the air inlet pipe is fixedly connected with a pressure cylinder, and the piston is in contact with the inner wall of the pressure cylinder; the device has the beneficial effects that the ratio of gas entering the furnace body can be controlled by injecting gas into the pressure cylinder and increasing the pressure at the upper end of the piston, and the speed before natural gas and air are mixed can be fixed by keeping the pressure borne by the piston unchanged, so that the optimal mixing ratio is constant.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgy and mechanical regenerative trolley heating furnaces, in particular to a flow monitoring and regulating device for natural gas and air transportation of regenerative trolley heating furnaces. Background Art

[0002] The trolley type heating furnace is an energy-consuming equipment, which mostly uses coal gas, natural gas and other energy sources, and the exhaust gas temperature is very high, about 800-1000℃, taking away a lot of heat. In order to achieve the purpose of energy saving and consumption reduction and waste heat recovery, the more popular advanced technology is the regenerative combustion technology, that is, by setting a large heat storage capacity heat storage body inside the burner to recover the flue gas waste heat and preheat the air. The preheating temperature can reach about 1000℃, saving about 40% energy.

[0003] Chinese patent CN201634739U is a regenerative full-radiation furnace wall heating furnace. It includes a furnace body, a furnace door, a flue, a burner embedded in the lower side wall of the furnace body, and a trolley arranged at the lower part of the furnace body. It is characterized in that the burner is embedded in the lower side wall of the furnace body at a position lower than the upper surface of the trolley. The burner consists of an air nozzle and a gas nozzle arranged below the air nozzle and connected to the air nozzle through a pipeline. The outlet of the burner is adjacent to the lower side wall of the furnace body and perpendicular to the bottom surface of the furnace body. The utility model has a simple structure, saves about 45% of energy, greatly reduces the oxidation and burning rate, and greatly improves the economic benefits of the production enterprise.

[0004] However, the above patent cannot ensure that the mixing ratio of natural gas and air is a constant optimal mixing ratio during operation. Therefore, the utility model proposes a flow monitoring and regulating device for natural gas and air transportation of a heat storage trolley heating furnace to solve the above problem. Utility Model Content

[0005] The utility model aims to provide a flow monitoring and regulating device for natural gas and air delivery in a regenerative trolley heating furnace, so as to solve the problem in the above background technology that the mixing ratio of natural gas and air cannot be guaranteed to be a constant optimal mixing ratio.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flow monitoring and regulating device for natural gas and air transportation of a heat storage trolley heating furnace, comprising: a pull rod, one end of which is fixedly connected to a gas hood, and the other end is fixedly connected to a piston, the surface of the gas hood is provided with air holes and is located in the exhaust pipe, the gas hood is sleeved with an air inlet pipe, the inner wall of the air inlet pipe is fixedly connected to a pressure cylinder, and the piston is in contact with the inner wall of the pressure cylinder.

[0007] Preferably, the upper end of the exhaust pipe is fixedly connected with a mixing pipe, the upper end of the mixing pipe is fixedly connected with a furnace body, a fan wheel is rotatably connected to the inner wall of the mixing pipe, the lower end of the exhaust pipe is fixedly connected with an intake pipe, and the outer wall of the air hood does not contact the inner wall of the exhaust pipe.

[0008] Preferably, several air holes are provided on the side of the air hood, the sizes of the several air holes are the same and are arranged evenly, the pull rod is fixedly connected to the midpoint of the upper end of the inner wall of the air hood, an intake pipe is sleeved inside the air hood, a limiting ring is fixedly installed at the lower end of the air hood, and the inner wall of the air hood does not contact the outer wall of the intake pipe.

[0009] Preferably, the pull rod passes through the upper end of the pressure cylinder and is connected with the piston, the outer ring surface of the piston and the inner wall of the pressure cylinder are in airtight contact, a through hole is provided at the upper end of the pressure cylinder, the pressure cylinder is fixedly connected with a detection pipe through the through hole, and the lower end of the pressure cylinder is fixedly connected with a cross.

[0010] Preferably, the end point of the cross that does not contact the pressure cylinder is fixedly connected to the inner wall of the intake pipe, another limiting ring is fixedly connected to the upper end of the intake pipe, and the outer wall of this limiting ring contacts the inner wall of the air hood.

[0011] Preferably, the end of the detection pipe far away from the through hole passes through the intake pipe and is detachably installed with a pipe cap, and the pipe cap is located outside the exhaust pipe.

[0012] Compared with the prior art, the beneficial effect of the present utility model is that by injecting gas into the pressure cylinder and increasing the pressure at the upper end of the piston, the ratio of the gas entering the furnace body can be controlled, and the pressure received by the piston remains unchanged, so that the rate before the mixing of natural gas and air can be fixed, thereby keeping the optimal mixing ratio constant. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the overall structure connection of the present utility model to the furnace body;

[0014] Figure 2 Cross-sectional view of the overall structure of the present utility model;

[0015] Figure 3 Schematic diagram inside the exhaust pipe of the present utility model;

[0016] Figure 4 Schematic diagram inside the intake pipe of the present utility model.

[0017] In the figure: 1. Furnace body; 2. Mixing pipe; 3. Fan wheel; 4. Exhaust pipe; 5. Air hood; 6. Air holes; 7. Limiting ring; 8. Pull rod; 9. Intake pipe; 10. Detection pipe; 11. Pipe cap; 12. Through hole; 13. Piston; 14. Cross; 15. Pressure cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to clearly and completely describe the purpose and technical solution of the present utility model, and make the advantages more clearly understood, the following further details the embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present utility model, rather than all of the embodiments, and are only used to explain the embodiments of the present utility model, not to limit the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0019] Please refer to Figures 1 to 4 , the present utility model provides a technical solution: a flow monitoring and regulating device for the transportation of natural gas and air in a regenerative trolley heating furnace, including: a pull rod 8, one end of the pull rod 8 is fixedly connected to an air hood 5, the other end of the pull rod 8 passes through the upper end of a pressure cylinder 15 and is connected to a piston 13, the side surface of the air hood 5 is provided with a plurality of air holes 6, through which the internal and external gases can be exchanged, the sizes of the plurality of air holes 6 are the same and are evenly arranged, which is easy to control the rate of gas exchange, the pull rod 8 is fixedly connected to the midpoint of the upper end of the inner wall of the air hood 5, this position can ensure that the air hood 5 does not tilt, an intake pipe 9 is sleeved inside the air hood 5, a limiting ring 7 is fixedly installed at the lower end of the air hood 5, and the inner wall of the air hood 5 does not contact the outer wall of the intake pipe 9.

[0020] The outer ring surface of the piston 13 and the inner wall of the pressure cylinder 15 are in airtight contact to avoid air leakage and other situations. A through hole 12 is opened at the upper end of the pressure cylinder 15, and the pressure cylinder 15 is fixedly connected to a detection pipe 10 through the through hole 12. At this time, the detection pipe 10 communicates with the inside of the pressure cylinder 15. The lower end of the pressure cylinder 15 is fixedly connected to a cross 14, and the other end of the cross 14 is fixedly connected to the intake pipe 9. The pressure cylinder 15 can be fixed by the cross 14 to avoid deviation. Another limiting ring 7 is fixedly connected to the upper end of the intake pipe 9, and the outer wall of this limiting ring 7 contacts the inner wall of the air hood 5. When the air hood 5 moves upward, the two limiting rings 7 can play a limiting role on the air hood 5 to prevent it from detaching. The cross 14 is located inside the intake pipe 9.

[0021] An exhaust pipe 4 is sleeved on the surface of the intake pipe 9, the exhaust pipe 4 is fixedly connected to a mixing pipe 2, the upper end of the mixing pipe 2 is fixedly connected to a furnace body 1, a fan wheel 3 is rotatably connected to the inner wall of the mixing pipe 2. When gas enters the mixing pipe 2, it will drive the fan wheel 3 to rotate, thereby further mixing the gas. The air hood 5 is located inside the exhaust pipe 4, and the outer wall of the air hood 5 does not contact the inner wall of the exhaust pipe 4. The end of the detection pipe 10 far from the through hole 12 passes through the intake pipe 9 and is detachably installed with a pipe cap 11. The detection pipe 10 can be closed by the pipe cap 11, and the pipe cap 11 is located outside the exhaust pipe 4.

[0022] When the device is working, after checking that the device is correct, open the pipe cover 11 and introduce an appropriate amount of suitable gas, and then close the pipe cover 11. At this time, the pressure at the upper end of the piston 13 increases. Subsequently, introduce air or natural gas into the intake pipe 9. When the gas gradually increases, the air hood 5 will be subjected to the pressure of air or natural gas, and the air hood 5 will gradually drive the piston 13 to move upward through the pull rod 8. When the air hood 5 moves to a certain height, the air hole 6 will be exposed. As the pressure decreases and the charged gas is fixed, the air hood 5 will stabilize at a certain height. At this time, the pressure received by the piston 13 is stable up and down, so a stable ratio can be maintained. When air or natural gas enters the exhaust pipe 4 through the air hole 6 and then enters the mixing pipe 2, the air and natural gas will drive the fan wheel 3 to rotate, making the mixing of air and natural gas more uniform. At the same time, the pressure in the pressure cylinder 15 can also be detected conveniently through the detection pipe 10.

[0023] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flow monitoring and regulating device for natural gas and air delivery in a regenerative trolley heating furnace, characterized in that: The flow monitoring and regulating device comprises: a pull rod (8), one end of the pull rod (8) is fixedly connected to an air hood (5), and the other end is fixedly connected to a piston (13), the surface of the air hood (5) is provided with an air hole (6) and is located in an exhaust pipe (4), the air hood (5) is sleeved with an air intake pipe (9), the inner wall of the air intake pipe (9) is fixedly connected to a pressure cylinder (15), and the piston (13) contacts the inner wall of the pressure cylinder (15).

2. The flow monitoring and regulating device for natural gas and air delivery of a regenerative trolley heating furnace according to claim 1, characterized in that: The upper end of the exhaust pipe (4) is fixedly connected to the gas mixing pipe (2), the upper end of the gas mixing pipe (2) is fixedly connected to the furnace body (1), the inner wall of the gas mixing pipe (2) is rotatably connected to the impeller (3), the bottom end of the exhaust pipe (4) is fixedly connected to the air intake pipe (9), and the outer wall of the gas hood (5) does not contact the inner wall of the exhaust pipe (4).

3. The flow monitoring and regulating device for natural gas and air delivery of a regenerative trolley heating furnace according to claim 1, characterized in that: The side of the air hood (5) is provided with a plurality of air holes (6), the plurality of air holes (6) are of the same size and are evenly arranged, a pull rod (8) is fixedly connected to the midpoint of the upper end of the inner wall of the air hood (5), an air intake pipe (9) is sleeved inside the air hood (5), a limiting ring (7) is fixedly installed at the lower end of the air hood (5), and the inner wall of the air hood (5) does not contact the outer wall of the air intake pipe (9).

4. The flow monitoring and regulating device for natural gas and air delivery of a regenerative trolley heating furnace according to claim 1, characterized in that: The pull rod (8) passes through the upper end of the pressure cylinder (15) and is connected to the piston (13); the outer ring surface of the piston (13) and the inner wall of the pressure cylinder (15) are in airtight contact; a through hole (12) is provided at the upper end of the pressure cylinder (15); the pressure cylinder (15) is fixedly connected to a detection tube (10) via the through hole (12); and the lower end of the pressure cylinder (15) is fixedly connected to a cross (14).

5. The flow rate monitoring and regulating device for natural gas and air delivery of a regenerative trolley heating furnace according to claim 4, characterized in that: The end of the cross (14) not in contact with the pressure cylinder (15) is fixedly connected to the inner wall of the air intake pipe (9), and the upper end of the air intake pipe (9) is fixedly connected to another limiting ring (7), and the outer wall of the limiting ring (7) is in contact with the inner wall of the air hood (5).

6. The flow rate monitoring and regulating device for natural gas and air delivery of a regenerative trolley heating furnace according to claim 4, characterized in that: One end of the detection tube (10) away from the through hole (12) passes through the air inlet pipe (9) and is detachably mounted with a tube cover (11), which is located outside the exhaust pipe (4).

Images