A multi-purpose jet system for generating an air flow with controllable speed and temperature

Abstract

The present invention belongs to the technical field of air flow control, and particularly relates to a multi-purpose jet system for generating air flow with controllable speed and temperature, including a jet test section and a gas distribution system. A circulating electric heating system is arranged on the jet test section, and the air inlet of the jet test section is connected to the gas distribution system. The jet test section includes a first test section, an intermediate test section, a terminal test section and a nozzle; each test section is connected by flange B to finally form a horizontal jet test section pipe segment; the present invention can generate deflagration jet and compressed jet air flows respectively through controllable combustible gas combustion and compressed gas; by adjusting the proportion of combustible gas or the initial pressure of compressed gas, a jet air flow with controllable speed and gas components can be generated; by adjusting the proportion of combustible gas or the temperature of compressed gas, a jet air flow with controllable high and low temperatures can be generated.

Description

Technical Field

[0001] The present invention belongs to the technical field of air flow control, and particularly relates to a multi-purpose jet system for generating air flow with controllable speed and temperature. Background Art

[0002] Currently, there is a combustible gas combustion tube system in industrial applications. By mixing combustible gas and combustion-supporting gas evenly and igniting them, an explosive gas flow can be generated. By adjusting the ratio of combustible gas to combustion-supporting gas, the flow rate of the explosive gas flow can be controlled. Since the temperature of the explosive gas flow is relatively high, when the required temperature range of the air flow changes significantly and low-temperature and high-temperature air flows need to be generated, this device cannot meet the requirements.

[0003] The chemical composition of the jet air flow of the combustible gas combustion tube system is restricted by various conditions, including the initial gas distribution ratio and the influence of the chemical reaction process. And the jet air flow of this device is the product after the combustion of the mixed gas. When the requirements for the chemical composition of the jet air flow are relatively high, this device cannot meet the requirements. Summary of the Invention

[0004] Aiming at the above deficiencies, the main purpose of the present invention is to overcome the shortcomings of the existing jet system and combustible gas combustion tube system, and provide a multi-purpose jet system for generating air flow with controllable speed and temperature.

[0005] The technical solution of the present invention is as follows:

[0006] A multi-purpose jet system for generating air flow with controllable speed, comprising a jet test section and a gas distribution system. A circulating electric heating system is arranged on the jet test section. The air inlet of the jet test section is connected to the gas distribution system. The jet test section includes a first test section, an intermediate test section, a terminal test section and a nozzle; each test section is connected by flange B, and finally forms a horizontal jet test section pipe segment;

[0007] One end of the nozzle is connected to one end of the first test section through flange A. The other end of the nozzle is sequentially connected to an electric valve and a bursting disc. The opening size of the nozzle jet is controlled by the electric valve. The size and angle of the nozzle are adjustable. A bursting disc is arranged at the end of the nozzle connected to the electric valve; the first test section near the nozzle is sealed by flange A and connected to the nozzle through flange A;

[0008] A valve is arranged at the outlet position of the first test section near the nozzle. One end of the valve is connected to one end of a circulating pump. The other end of the circulating pump is connected to one end of a heater. The other end of the heater is connected to the valve. The valve is near the air inlet of the terminal test section;

[0009] The circulating electric heating system includes a circulating pump, a heater, a pressure sensor and a temperature sensor;

[0010] A pressure sensor is provided on the first test section, and an electric valve is provided between the first test section and the pressure sensor to control the start and stop of the pressure sensor; a temperature sensor is provided on the middle test section, and an electric valve is provided between the temperature sensor and the middle test section to control the start and stop of the temperature sensor;

[0011] At the air inlet of the end test section, it is connected to the gas distribution system, vacuum pump, and high-energy igniter respectively by flanges. An electric valve is provided between the end test section and the vacuum pump to control the start and stop of the vacuum pump;

[0012] The gas distribution system includes three gas distribution paths, and the three gas distribution paths converge into a main gas distribution path. An electric valve is provided between the main gas distribution path and the air inlet of the end test section.

[0013] A multi-purpose jet system for generating a controllable-speed airflow, and the nozzle can be a nozzle of different shapes such as circular or square.

[0014] A multi-purpose jet system for generating a controllable-speed airflow, where the first test section, middle test section, and end test section are made of stainless steel pipes with an inner diameter of 18 cm, a multi-segment wall thickness of 1 cm, and a length of 20 cm spliced together.

[0015] A multi-purpose jet system for generating a controllable-speed airflow, and the length of the jet test section can be increased by adding test sections.

[0016] A multi-purpose jet system for generating a controllable-speed airflow, and the entire horizontal jet test section is fixed to the ground by several brackets.

[0017] A multi-purpose jet system for generating a controllable-speed airflow, where the first gas distribution path includes an oxygen tank, and a stop valve, a flame arrester, and an electric valve are sequentially provided between the oxygen tank and the main gas distribution path;

[0018] The second gas distribution path includes a combustible gas tank, and a stop valve and an electric valve are sequentially provided between the combustible gas tank and the main gas distribution path;

[0019] The third gas distribution path includes a nitrogen tank, and a stop valve, a flame arrester, and an electric valve are sequentially provided between the nitrogen tank and the main gas distribution path.

[0020] A multi-purpose jet system for generating a controllable-speed airflow, and all electric valves are connected to a control box, and the control box controls the opening and closing of each electric valve.

[0021] The beneficial effects of the present invention are as follows:

[0022] The present invention can respectively generate deflagration jet and compressed jet airflows through controllable combustion of combustible gas and compressed gas;

[0023] The present invention can generate a jet air flow with controllable speed and gas components by adjusting the proportion of combustible gas or the initial pressure of compressed gas;

[0024] The present invention can generate a jet air flow with controllable temperature, including high temperature and low temperature, by adjusting the proportion of combustible gas or the temperature of compressed gas. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the multi-purpose jet system of the present invention;

[0026] In the figure: 1, bursting disc; 2, electric valve; 3, nozzle; 4, flange A; 5-1, first experimental section; 5-2, intermediate experimental section; 5-3, end experimental section; 6, circulation pump; 7, heater; 8, pressure sensor; 9, temperature sensor; 10, flange B; 11, bracket; 12, vacuum pump; 13, high-energy igniter; 14, compressor; 15, flame arrester; 16, stop valve; 17, oxygen tank; 18, combustible gas tank; 19, nitrogen tank; 20, control box. Detailed Embodiments

[0027] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0028] A multi-purpose jet system for generating an air flow with controllable speed includes a jet experimental section and a gas distribution system. A circulating electric heating system is provided on the jet experimental section, and the air inlet of the jet experimental section is connected to the gas distribution system. The jet experimental section includes a first test section 5-1, an intermediate experimental section 5-2, an end experimental section 5-3, and a nozzle 3.

[0029] The nozzle 3 can be a nozzle with different shapes such as circular or square. One end of the nozzle 3 is connected to one end of the first test section 5-1 through a flange A4, and the other end of the nozzle 3 is sequentially connected to an electric valve 2 and a bursting disc 1. The opening size of the jet of the nozzle 3 is controlled by the electric valve 2. The size and angle of the nozzle are adjustable, and a bursting disc 1 is provided at one end of the nozzle 3 connected to the electric valve 2.

[0030] The first test section 5-1, the intermediate experimental section 5-2, and the end experimental section 5-3 are formed by splicing stainless steel pipes with an inner diameter of 18 cm, a multi-segment wall thickness of 1 cm, and a length of 20 cm. Each experimental section is connected by a flange B10 to finally form a horizontal jet experimental section pipe segment. The entire horizontal jet experimental section is fixed to the ground by a plurality of brackets 11.

[0031] One end of the first experimental section 5-1 close to the nozzle is sealed by a flange A4 and connected to the nozzle 3 through the flange A4; an electric valve 2 is provided on the nozzle 3 to control the opening size of the jet of the nozzle 3; the size and angle of the nozzle are adjustable, and a bursting disc 1 is provided at the other end of the nozzle 3.

[0032] The circulating electric heating system includes a circulating pump 6, a heater 7, a pressure sensor 8 and a temperature sensor 9.

[0033] A valve is arranged at the outlet position of the first experimental section 5-1 near the nozzle 3. One end of the valve is connected to one end of the circulating pump 6, the other end of the circulating pump 6 is connected to one end of the heater 7, and the other end of the heater 12 is connected to the valve 13. The valve 13 is near the air inlet of the terminal experimental section 5-3.

[0034] A pressure sensor 8 is arranged on the first test section 5-1, and an electric valve is arranged between the first test section 5-1 and the pressure sensor 8 to control the start and stop of the pressure sensor 8. A temperature sensor 9 is arranged on the middle experimental section 5-2, and an electric valve is arranged between the temperature sensor 9 and the middle experimental section 5-2 to control the start and stop of the temperature sensor 9.

[0035] The air inlet of the terminal experimental section 5-3 is respectively connected to the gas distribution system, the vacuum pump 12 and the high-energy igniter 13 by flanges. An electric valve is arranged between the terminal experimental section 5-3 and the vacuum pump 12 to control the start and stop of the vacuum pump 12.

[0036] The length of the jet experimental section can be increased by adding experimental sections.

[0037] The gas distribution system includes three gas distribution paths. The three gas distribution paths converge into one main gas distribution path, and an electric valve is arranged between the main gas distribution path and the air inlet of the terminal experimental section 5-3.

[0038] The first gas distribution path includes an oxygen tank 17. A globe valve 16, a flame arrester 15 and an electric valve are successively arranged between the oxygen tank 17 and the main gas distribution path.

[0039] The second gas distribution path includes a combustible gas tank 18. A globe valve 16 and an electric valve are successively arranged between the combustible gas tank 18 and the main gas distribution path.

[0040] The third gas distribution path includes a nitrogen tank 19. A globe valve 16, a flame arrester 15 and an electric valve are successively arranged between the nitrogen tank 19 and the main gas distribution path.

[0041] All the above-mentioned electric valves are connected to the control box 20, and the control box 20 controls the opening and closing of each electric valve.

Claims

1. A multi-purpose jet system for generating airflows with controllable speed and temperature, comprising a jet test section and a gas distribution system. A circulating electric heating system is provided on the jet test section. The air inlet of the jet test section is connected to the gas distribution system. The jet test section includes a first test section, an intermediate test section, a terminal test section, and a nozzle. Each test section is connected by flange B, and finally forms a horizontal jet test section pipe segment. It is characterized in that: One end of the nozzle is connected to one end of the first test section through flange A. The other end of the nozzle is sequentially connected to an electric valve and a rupture membrane. The opening size of the nozzle jet is controlled by the electric valve. The size and angle of the nozzle are adjustable. A rupture membrane is provided at the end of the nozzle connected to the electric valve. The first test section near the nozzle end is sealed by flange A and connected to the nozzle through flange A. A first valve is arranged at the outlet of the first test section near the nozzle. One end of the first valve is connected to one end of a circulation pump. The other end of the circulation pump is connected to one end of a heater. The other end of the heater is connected to a second valve. The second valve is near the air inlet of the terminal test section. The circulating electric heating system includes a circulation pump, a heater, a pressure sensor, and a temperature sensor. A pressure sensor is provided on the first test section. An electric valve is provided between the first test section and the pressure sensor to control the start and stop of the pressure sensor. A temperature sensor is provided on the intermediate test section. An electric valve is provided between the temperature sensor and the intermediate test section to control the start and stop of the temperature sensor. The air inlet of the terminal test section is connected to the gas distribution system, a vacuum pump, and a high-energy igniter through flanges respectively. An electric valve is provided between the terminal test section and the vacuum pump to control the start and stop of the vacuum pump. The gas distribution system includes three gas distribution paths. The three gas distribution paths converge into a main gas distribution path. An electric valve is provided between the main gas distribution path and the air inlet of the terminal test section. The nozzle is a circular or square nozzle. The first test section, the intermediate test section, and the terminal test section are made of stainless steel pipes with an inner diameter of 18 cm, a multi-section wall thickness of 1 cm, and a length of 20 cm spliced together.

2. A multi-purpose jet system for generating airflows with controllable speed and temperature according to claim 1, It is characterized in that: The length of the jet test section is increased by adding test sections.

3. A multi-purpose jet system for generating airflows with controllable speed and temperature according to claim 1, It is characterized in that: The entire horizontal jet test section is fixed to the ground by a number of brackets.

4. A multi-purpose jet system for generating airflows with controllable speed and temperature according to claim 1, It is characterized in that: The first gas distribution path includes an oxygen tank. A stop valve, a flame arrester, and an electric valve are sequentially provided between the oxygen tank and the main gas distribution path. The second gas distribution path includes a combustible gas tank. A stop valve and an electric valve are sequentially provided between the combustible gas tank and the main gas distribution path. The third gas distribution path includes a nitrogen tank. A stop valve, a flame arrester, and an electric valve are sequentially provided between the nitrogen tank and the main gas distribution path.

5. A multi-purpose jet system for generating airflows with controllable speed and temperature according to claim 1, It is characterized in that: All electric valves are connected to the control box, and the control box controls the opening and closing of each electric valve.

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