阅读说明：本技术 一种不同温度高速高压流动空气混合的方法 (Method for mixing high-speed and high-pressure flowing air at different temperatures ) 是由 范东林 程丰 李玉雪 王立民 阮文辉 于 2019-09-10 设计创作，主要内容包括：一种不同温度高速高压空气混合的方法,该方法使用到一套空气混合管路并含有总控制球阀、加热装置、第一控制球阀、控制开关阀、温度传感器、第一控制针阀、第二控制球阀、第二控制针阀、控制单向阀及第三控制球阀,主要针对军工产品高温空气管路的压力测试、控制舱吹气或是电液能源组合热吹气试验以及电液能源组合密封性检查等,能随时实施各阀之间的控制转换,使得热吹切换冷吹工序所需的24h准备时间缩短为仅需几分钟的阀门切换时间,工作效率得到极大提升,具有温度和压力可控之特点。(A method for mixing high-speed and high-pressure air at different temperatures uses a set of air mixing pipeline and comprises a master control ball valve, a heating device, a first control ball valve, a control switch valve, a temperature sensor, a first control needle valve, a second control ball valve, a second control needle valve, a control one-way valve and a third control ball valve, and mainly aims at pressure test of a high-temperature air pipeline of a military product, control cabin blowing or electro-hydraulic energy combined hot blowing test, electro-hydraulic energy combined tightness inspection and the like.)

1. The utility model provides a method that high-speed high-pressure air of different temperatures mixes, this method uses a set of air mixing pipeline, air mixing pipeline contains total control ball valve (1), heating device (2), first control ball valve (3), control switch valve (4), temperature sensor (5), first control needle valve (6), second control ball valve (7), second control needle valve (8), control check valve (9) and third control ball valve (10), characterized by:

a normal temperature air pipeline with the pressure of 7-7.4 MPa is connected to the front end of a master control ball valve (1), the pipe diameter of an inner cavity of the normal temperature air pipeline is controlled to be two centimeters, the rear end of the master control ball valve (1) is connected with a heating device (2), the heating device (2) is connected with a first control ball valve (3), the first control ball valve (3) is connected with a control switch valve (4), a pipeline behind the control switch valve is connected with a temperature sensor (5), the temperature monitoring range of the temperature sensor (5) is controlled to be normal temperature-300 ℃, the pressure of the temperature sensor is controlled to be 4.5-6.0 MPa, a pipeline behind the temperature sensor (5) is connected with a gas feeding metal hose, and the gas feeding metal hose is connected with a control cabin or an electro-hydraulic energy combination;

a first control needle valve (6) is connected with a pipeline bypass behind the heating device (2), and the first control needle valve (6) is connected in series with the pipeline in front of the control switch valve (4);

a second control ball valve (7) is connected with a pipeline bypass in front of the heating device (2), the second control ball valve (7) is connected with a second control needle valve (8), the second control needle valve (8) is connected with a control one-way valve (9), and the control one-way valve (9) is connected in series with the pipeline in front of the control switch valve (4);

the front end of the master control ball valve (1) is connected with a third control ball valve (10), and a pipeline behind the third control ball valve (10) is connected with a pressure regulating valve test bench again through a metal pipe and is used for performance test of a pressure regulating valve;

the master control ball valve (1), the first control ball valve (3), the control switch valve (4), the second control ball valve (7) and the third control ball valve (10) can realize centralized control of electric appliances, the first control needle valve (6) and the second control needle valve (8) can adjust the opening degree of each needle valve according to needs, and the temperature sensor can display and read the instant temperature in real time;

when the control cabin needs to blow air or the electro-hydraulic energy combination needs to blow air in a hot mode, the main control ball valve (1), the first control ball valve (3), the control switch valve (4), the first control needle valve (6) and the second control needle valve (8) are all in an open state, and the second control ball valve (7) and the third control ball valve (10) are all in a closed state;

when the electro-hydraulic energy combination needs to be checked for cold blowing tightness, a master control ball valve (1), a control switch valve (4), a first control needle valve (6), a second control ball valve (7), a second control needle valve (8) and a control check valve (9) are all in an open state, and a first control ball valve (3) and a third control ball valve (10) are all in a closed state;

when the pressure test of the pressure regulating valve is needed, the third control ball valve (10) is opened, the master control ball valve (1), the first control ball valve (3), the control switch valve (4) and the second control ball valve (7) are closed, and the pressure regulating valve test bench behind the third control ball valve (10) is adjusted to perform the performance test of the pressure regulating valve.

Technical Field

The invention belongs to the technical field of flowing air mixing tests, and particularly relates to a method for mixing flowing air at different temperatures, high speed and high pressure.

Background

At present, the problems of low efficiency and poor economy caused by inconsistent temperature requirements of the air blowing of the electro-hydraulic energy combination and the air blowing of the control cabin exist in the repair process of a certain product, namely the temperature of the electro-hydraulic energy combination during hot blowing is required to be controlled to be 250-300 ℃, but the air tightness is required to be checked when the temperature is lower than 100 ℃ through cold blowing. If the temperature needs to be reduced for about 24 hours when the hot blowing operation is changed into the cold blowing operation, the preparation time of the air tightness inspection is longer. If the cold blowing is required to be converted into the hot blowing, heating energy consumption is caused, and the sealing failure of the normal-temperature joint is caused because high-temperature gas enters the normal-temperature pipeline due to misoperation or high pressure of the high-temperature gas.

In addition, the original air blowing pipeline has the problems of low production efficiency, high cost and the like.

Disclosure of Invention

In order to solve the problems, the invention provides a method for mixing high-speed and high-pressure air with different temperatures, which can mix high-temperature medium-pressure air with the temperature of 250-300 ℃ and the pressure of 7-7.4 MPa with room temperature and medium-pressure air with the pressure of 7-7.4 MPa in a pipeline with the diameter of two centimeters under the condition of flowing at the same speed, and the mixed air has uniform pressure and uniform and controllable temperature and is in an approximate laminar flow state.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a method that high-speed high-pressure air of different temperatures mixes, this method uses a set of air mixing pipeline, air mixing pipeline contains total control ball valve, heating device, first control ball valve, control switch valve, temperature sensor, first control needle valve, second control ball valve, second control needle valve, control check valve and third control ball valve, characterized by:

a normal temperature air pipeline with the pressure of 7-7.4 MPa is connected to the front end of a master control ball valve, the pipe diameter of an inner cavity of the normal temperature air pipeline is controlled to be two centimeters, the rear end of the master control ball valve is connected with a heating device, the heating device is connected with a first control ball valve, the first control ball valve is connected with a control switch valve, a pipeline behind the control switch valve is connected with a temperature sensor, the temperature monitoring range of the temperature sensor is controlled to be normal temperature-300 ℃, the pressure of the temperature sensor is controlled to be 4.5-6.0 MPa, a pipeline behind the temperature sensor is connected with a gas feeding metal hose, and the gas feeding metal hose is connected with a control cabin or an electro-hydraulic energy combination;

a first control needle valve is connected with a pipeline bypass behind the heating device, and the first control needle valve is connected with a pipeline in front of the control switch valve in series;

a second control ball valve is connected with a bypass of a pipeline in front of the heating device, the second control ball valve is connected with a second control needle valve, the second control needle valve is connected with a control one-way valve, and the control one-way valve is connected in series with the pipeline in front of the control switch valve;

the front end of the master control ball valve is connected with a third control ball valve, and a pipeline behind the third control ball valve is connected with the pressure regulating valve test table again through a metal pipe and is used for performance test of the pressure regulating valve;

the master control ball valve, the first control ball valve, the control switch valve, the second control ball valve and the third control ball valve can realize centralized control of electric appliances, the first control needle valve and the second control needle valve can adjust the opening degree of each needle valve according to needs, and the temperature sensor can instantly display and read the instant temperature;

when the control cabin needs to blow air or the electro-hydraulic energy combination needs to blow air in a hot mode, the main control ball valve, the first control ball valve, the control switch valve, the first control needle valve and the second control needle valve are all in an open state, and the second control ball valve and the third control ball valve are all in a closed state;

when the electro-hydraulic energy combination needs to be checked for cold blowing tightness, a master control ball valve, a control switch valve, a first control needle valve, a second control ball valve, a second control needle valve and a control check valve are all in an open state, and the first control ball valve and a third control ball valve are all in a closed state;

when the pressure test of the pressure regulating valve is needed, the third control ball valve is opened, the master control ball valve, the first control ball valve, the control switch valve and the second control ball valve are closed, and the pressure regulating valve test bench behind the third control ball valve is adjusted to test the performance of the pressure regulating valve.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

1. the device has the characteristics of controllable temperature and pressure for pressure test of a high-temperature air pipeline, control cabin blowing or electro-hydraulic energy combination hot blowing test and electro-hydraulic energy combination tightness check, and can achieve the expected effect.

2. The invention can implement control conversion among all valves at any time, so that the 24h preparation time required by the hot-blowing switching cold-blowing process is shortened to the valve switching time of only a few minutes, and the working efficiency is greatly improved.

3. When the cold blowing is converted into the hot blowing, the energy consumption required for heating from normal temperature to 300 ℃ is saved, and the economical efficiency is good.

Drawings

FIG. 1 is a schematic diagram of the air mixing circuit of the present invention.

In fig. 1: the method comprises the following steps of 1-a main control ball valve, 2-a heating device, 3-a first control ball valve, 4-a control switch valve, 5-a temperature sensor, 6-a first control needle valve, 7-a second control ball valve, 8-a second control needle valve, 9-a control one-way valve and 10-a third control ball valve.

Detailed Description

Referring to fig. 1, the present invention uses a set of air mixing pipeline, which includes a main control ball valve 1, a heating device 2, a first control ball valve 3, a control switch valve 4, a temperature sensor 5, a first control needle valve 6, a second control ball valve 7, a second control needle valve 8, a control check valve 9, and a third control ball valve 10.

The invention relates to a method for mixing high-speed and high-pressure air at different temperatures, which follows Gao-Lusak's law, adopts Fluent software to perform qualitative simulation calculation and centralized control, and outputs gas with uniform temperature and pressure and approximate laminar flow state after passing through a temperature sensor.

The coupling relationship of the air mixing pipeline according to fig. 1 refers to the technical solution, which is not described in detail.

The air mixing pipeline has the following working states:

when the control cabin need blow or when the electricity liquid energy combination needs hot blowing, total control ball valve 1, first control ball valve 3, control switch valve 4 and first control needle valve 6, second control needle valve 8 all are in the on-state, and second control ball valve 7, third control ball valve 10 all are in the off-state, notice first control needle valve 6 and second control needle valve 8 need adjust fixed aperture in advance, first control needle valve 6 and second control needle valve 8 quoted below are the fixed aperture of adjustment and the aperture adjustment back need maintain unchangeably.

When the electro-hydraulic energy combination needs to be checked for cold blowing tightness, a main control ball valve 1, a first control needle valve 6, a second control ball valve 7, a second control needle valve 8, a control one-way valve 9 and a control switch valve 4 are all in an open state, a first control ball valve 3 and a third control ball valve 10 are all in a closed state, at the moment, high-temperature medium-pressure air is in a pipeline behind the first control needle valve 6, normal-temperature medium-pressure air is in a pipeline behind the control one-way valve 9, air between the two pipelines is changed into 90-degree-direction mixed gas through 180-degree opposite-direction mixing, namely T-shaped pipeline mixing, and then the medium-pressure air below 100 ℃ is output through the control switch valve 4.

When the pressure test of the pressure regulating valve is needed, the third control ball valve 10 is opened, the master control ball valve 1, the first control ball valve 3, the control switch valve 4 and the second control ball valve 7 are closed, the pressure regulating valve test bench behind the third control ball valve 10 is adjusted, the performance test of the pressure regulating valve can be carried out, and the opening degrees of the first control needle valve 6 and the second control needle valve 8 are kept unchanged.

The first control needle valve 6 and the second control needle valve 8 are used for adjusting the flow, and the first control ball valve 3, the control switch valve 4, the second control ball valve 7, the third control ball valve 10 and the needle valves are all controlled in a centralized manner through electric appliance logic.

Although the structural connection of the air mixing pipeline is not complicated, the quick switching of cold blowing and hot blowing is realized, more importantly, the air mixing pipeline is mixed in a pipeline with the diameter of two centimeters under the condition of the same speed flow, the pressure is uniform, the temperature is uniform and controllable after the mixing, and the mixed air is in a similar laminar flow state, so that the positive effect and the creativity are obvious to the field.