A flame safe cutting operation flame control device and method of use

Abstract

The application provides a flame continuous cutting operation safety fire blocking control device and a use method thereof, relates to the field of gas welding and cutting equipment, and comprises a gas supply unit, a purification unit, a fire blocking unit, an exhaust unit, an equipment connection unit and a control unit; the right end of the gas supply unit is connected with the purification unit; the right end of the gas supply unit is connected with the fire blocking unit; the right end of the fire blocking unit is connected with the exhaust unit; the right end of the fire blocking unit is connected with the equipment connection unit; and the control unit is electrically connected with the gas supply unit, the purification unit, the fire blocking unit, the exhaust unit and the equipment connection unit respectively, so as to solve the problem that continuous operation cannot be performed due to the long interval time after the operation is performed again after the fire is blocked.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gas welding equipment, in particular to a flame continuous cutting operation safety flame arrestor. BACKGROUND

[0002] In the process of cutting and welding, when using gas flammability for operation, due to unstable gas flow or blockage of the gas outlet by other foreign matter, or improper closing sequence of the flammable gas after operation, backfire may occur, which may continue to extend along the pipeline and cause deflagration or slight explosion, resulting in damage to the gas supply equipment.

[0003] The existing backfire device has a wet flame arrestor and a dry flame arrestor. The wet flame arrestor uses the isolation effect of water seal to block backfire, and the dry flame arrestor uses the dense and dispersed pores of the internal flame arrestor to greatly reduce the reaction degree. Since the gas supply pipeline continues to supply gas, the heat released by the combustion reaction heats the flame arrestor. When the temperature is high or the reaction time is long, the combustion reaction will still spread backward through the flame arrestor, which cannot completely achieve the purpose of flame arrest, and the flame arrestor will be burned out, reducing the service life of the dry flame arrestor.

[0004] In actual production process, while responding to backfire reaction, it is also necessary to handle it in time to ensure continuous operation and improve efficiency. During the flame arrest process, the gas in the pipeline needs to be re-introduced for operation after backfire combustion, and the intermediate interval time is relatively long, which cannot meet the use demand of some continuous cutting operation places. SUMMARY

[0005] The purpose of the present application is to provide a flame continuous cutting operation safety flame arrestor and its use method, to solve the problem of long intermediate interval time after flame arrest for operation.

[0006] Implementation of the present application:

[0007] A flame continuous cutting operation safety flame arrestor, comprising a gas supply unit, a purification unit, a flame arrest unit, an exhaust unit, a device connection unit and a control unit; the right end of the gas supply unit is connected with the purification unit; the right end of the gas supply unit is connected with the flame arrest unit; the right end of the flame arrest unit is connected with the exhaust unit; the right end of the flame arrest unit is connected with the device connection unit; the control unit is electrically connected with the gas supply unit, the purification unit, the flame arrest unit, the exhaust unit and the device connection unit respectively.

[0008] Furthermore, the gas supply unit includes an air inlet, an air inlet pipe, a first air supply pipe, a second air supply pipe, a first one-way valve, a second one-way valve, a pressure-stabilizing branch pipe, and a pressure-stabilizing pipe; the air inlet pipe is provided with an air inlet; the first air supply pipe is located at the upper end of the air inlet pipe; a first air supply valve is located on the left side of the first air supply pipe; the second air supply pipe is located at the lower end of the air inlet pipe; a second air supply valve is located on the left side of the second air supply pipe; the right end of the first air supply pipe is connected to the air inlet end of the first one-way valve; the right end of the second air supply pipe is connected to the air inlet end of the second one-way valve; the upper end of the pressure-stabilizing branch pipe is connected between the first air supply valve and the first one-way valve; the lower end of the pressure-stabilizing branch pipe is connected between the second air supply valve and the second one-way valve; one end of the pressure-stabilizing pipe is connected to the middle of the air inlet pipe; the other end of the pressure-stabilizing pipe is connected to the middle of the pressure-stabilizing branch pipe; a pressure-stabilizing tank is located in the middle of the pressure-stabilizing pipe; a pressure-stabilizing charging valve is located on the left side of the pressure-stabilizing pipe; a first pressure-stabilizing valve is located at the upper part of the pressure-stabilizing branch pipe; and a second pressure-stabilizing valve is located at the lower part of the pressure-stabilizing branch pipe.

[0009] Furthermore, the purification unit includes an air blowing pipe, a first air blowing valve, a second air blowing valve, and an air blowing interface; the first air blowing valve is provided at the upper part of the air blowing pipe; the second air blowing valve is provided at the lower part of the air blowing pipe; and an air blowing interface is provided between the first air blowing valve and the second air blowing valve.

[0010] Furthermore, the flame-arresting unit includes a first flame-arresting device, a second flame-arresting device, a slag discharge pipe, and a slag discharge port; the first flame-arresting device is located at the upper end of the slag discharge pipe; the second flame-arresting device is located at the lower end of the slag discharge pipe; the slag discharge port is located in the middle of the slag discharge pipe; a first slag discharge valve is provided between the first flame-arresting device and the slag discharge port; and a second slag discharge valve is provided between the second flame-arresting device and the slag discharge port.

[0011] Furthermore, the outlet of the first one-way valve is connected to the upper end of the air blowing pipe and the left end of the first flame arrester via a three-way pipe; the outlet of the second one-way valve is connected to the lower end of the air blowing pipe and the left end of the second flame arrester via a three-way pipe.

[0012] Furthermore, the exhaust unit includes an exhaust pipe, an exhaust port, a first exhaust valve, and a second exhaust valve; the exhaust port is located in the middle of the exhaust pipe; the first exhaust valve is located in the upper part of the exhaust pipe; and the second exhaust valve is located in the lower part of the exhaust pipe.

[0013] Furthermore, the equipment connection unit includes a first equipment connection valve, a second equipment connection valve, and an equipment connection port; the first equipment connection valve and the second equipment connection valve are connected by a pipeline; the equipment connection port is located between the first equipment connection valve and the second equipment connection valve.

[0014] Furthermore, the right end of the first flame arrester is connected to the first exhaust valve and the first equipment connection valve respectively via a three-way pipe; the right end of the second flame arrester is connected to the second exhaust valve and the second equipment connection valve respectively via a three-way pipe.

[0015] Further, the control unit comprises a controller, a constant pressure detection unit, a first temperature detection unit, a second temperature detection unit and an exhaust pressure detection unit; the constant pressure detection unit is connected with the constant pressure tank; the first temperature detection unit is connected with the first flame arrestor; the second temperature detection unit is connected with the second flame arrestor; the exhaust pressure detection unit is connected with the exhaust port; the controller is electrically connected with the constant pressure detection unit, the first temperature detection unit, the second temperature detection unit, the exhaust pressure detection unit, the first gas supply valve, the second gas supply valve, the constant pressure filling valve, the first constant pressure valve, the second constant pressure valve, the first blowing valve, the second blowing valve, the first slag discharge valve, the second slag discharge valve, the first exhaust valve, the second exhaust valve, the first equipment connection valve and the second equipment connection valve.

[0016] Further, a method for using the continuous cutting operation safety gas supply flame arrestor control device comprises the following steps:

[0017] Step 1: Close all valves, connect the gas inlet with the combustible gas, connect the blowing interface with the blowing device, and connect the equipment connection port with the gas using equipment;

[0018] Step 2: Open the device, and the controller controls the constant pressure filling valve to open, so that the combustible gas enters the constant pressure pipe to charge the constant pressure tank;

[0019] Step 3: When the constant pressure detection unit detects that the gas pressure in the constant pressure tank reaches a certain value, the controller controls the constant pressure filling valve to close, and controls the first gas supply valve and the first equipment connection valve to open;

[0020] Step 4: The combustible gas passes through the first gas supply pipe and the first flame arrestor, and finally reaches the gas using equipment from the equipment connection port through the first equipment connection valve;

[0021] Step 5: When backfire occurs, the combustion reaction enters the first flame arrestor along the pipeline through the first equipment connection valve, and when the first temperature detection unit detects that the temperature in the first flame arrestor rises to a set value, the controller controls the first gas supply valve and the first equipment connection valve to close, and controls the second gas supply valve and the second equipment connection valve to open;

[0022] Step 6: The combustible gas passes through the second gas supply pipe and the second flame arrestor, and finally reaches the gas using equipment from the equipment connection port through the second equipment connection valve;

[0023] Step 7: The controller controls the first blowing valve and the first exhaust valve to open, the blowing device inputs gas to the first flame arrestor through the blowing interface to eliminate the combustion reaction and cool down the inside of the first flame arrestor, and then enters the exhaust pipe through the first exhaust valve and is finally discharged from the exhaust port;

[0024] Step 8: After the first temperature detecting unit detects that the temperature of the airflow in the first flame arrester decreases to the set value, the controller controls the first exhaust valve to close and the first slag discharge valve to open;

[0025] Step 9: The combustion water vapor in the first flame arrester is discharged along with the airflow through the slag discharge port, and then the first slag discharge valve is closed;

[0026] Step 10: The controller controls the first pressure stabilizing valve and the first exhaust valve to open, and the combustible gas stored in the pressure stabilizing tank is discharged from the exhaust port through the pressure stabilizing branch pipe, the first one-way valve and the first flame arrester;

[0027] Step 11: After the controller receives the detection of the change in the exhaust port pressure by the exhaust pressure detecting unit, it is determined that the combustible gas fills the pipeline, and then the controller controls the first pressure stabilizing valve and the first exhaust valve to close;

[0028] Step 12: When backfire occurs again, the controller controls the second gas supply valve and the second equipment connection valve to close, and the first gas supply valve and the first equipment connection valve to open, so that the combustible gas is discharged from the equipment connection port to the gas using equipment through the first gas supply pipe and the first flame arrester, and then the same control execution mode is performed on the second flame arrester to reduce the temperature and discharge the slag.

[0029] Step 13: When the pressure stabilizing pressure detecting unit detects that the pressure in the pressure stabilizing tank decreases to the set value, the control unit controls the pressure stabilizing gas filling valve to open to fill the pressure stabilizing tank with combustible gas during the non-operation period of the gas using equipment, and the pressure stabilizing pressure detecting unit detects that the pressure in the pressure stabilizing tank reaches a certain value, and then the controller controls the pressure stabilizing gas filling valve to close.

[0030] Advantages of the present application:

[0031] 1. Compared with using a wet flame arrester or a dry flame arrester alone, backfire can be more effectively blocked;

[0032] 2. Reduces the operation interval after backfire and ensures the operation continuity of the gas using equipment;

[0033] 3. The temperature reducing, slag discharging and exhaust pipe is arranged on the cavity in the exhaust direction of the flame arrester, which reduces the water vapor content of the secondary ventilation after backfire;

[0034] 4. Real-time temperature monitoring can adjust the backfire setting temperature and temperature reduction according to the properties of the supplied combustible gas or the ambient temperature, and has good versatility. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 Schematic diagram of the flame continuous cutting operation safety flame arrester control device;

[0036] Figure 2 Schematic diagram of the gas supply unit;

[0037] Figure 3 schematic diagram of the purifying unit;

[0038] Figure 4 schematic diagram of the fire blocking unit;

[0039] Figure 5 schematic diagram of the exhaust unit and the equipment connecting unit;

[0040] In the figure, 1 is a gas supply unit, 1-2 is an air inlet pipe, 1-3 is a first gas supply pipe, 1-3-1 is a first gas supply valve, 1-4 is a second gas supply pipe, 1-4-1 is a second gas supply valve, 1-5 is a first one-way valve, 1-6 is a second one-way valve, 1-7 is a pressure stabilizing branch pipe, 1-7-1 is a first pressure stabilizing valve, 1-7-2 is a second pressure stabilizing valve, 1-8 is a pressure stabilizing pipe, 1-8-1 is a pressure stabilizing tank, 1-8-2 is a pressure stabilizing inflation valve, 2 is a purifying unit, 2-1 is a gas blowing pipe, 2-2 is a first gas blowing valve, 2-3 is a second gas blowing valve, 2-4 is a gas blowing interface, 3 is a fire blocking unit, 3-1 is a first fire blocking device, 3-2 is a second fire blocking device, 3-3 is a slag discharge pipe, 3-4 is a slag discharge port, 3-5 is a first slag discharge valve, 3-6 is a second slag discharge valve, 4 is an exhaust unit, 4-1 is an exhaust pipe, 4-2 is an exhaust port, 4-3 is a first exhaust valve, 4-4 is a second exhaust valve, 5 is an equipment connecting unit, 5-1 is a first equipment connecting valve, 5-2 is a second equipment connecting valve, 5-3 is an equipment connecting port, 6 is a control unit, 6-1 is a controller, 6-2 is a pressure stabilizing pressure detection unit, 6-3 is a first temperature detection unit, 6-4 is a second temperature detection unit, 6-5 is an exhaust pressure detection unit. DETAILED DESCRIPTION

[0041] The present application is further described below through specific embodiments.

[0042] Embodiment 1

[0043] The present embodiment provides a fire continuous cutting operation safety fire blocking control device, which comprises a gas supply unit 1, a purifying unit 2, a fire blocking unit 3, an exhaust unit 4, an equipment connecting unit 5 and a control unit 6; the right end of the gas supply unit 1 is connected with the purifying unit 2; the right end of the gas supply unit 1 is connected with the fire blocking unit 3; the right end of the fire blocking unit 3 is connected with the exhaust unit 4; the right end of the fire blocking unit 3 is connected with the equipment connecting unit 5; the control unit 6 is electrically connected with the gas supply unit 1, the purifying unit 2, the fire blocking unit 3, the exhaust unit 4 and the equipment connecting unit 5 respectively.

[0044] Preferably, the air supply unit 1 includes an air inlet 1-1, an air inlet pipe 1-2, a first air supply pipe 1-3, a second air supply pipe 1-4, a first one-way valve 1-5, a second one-way valve 1-6, a pressure stabilizing branch pipe 1-7, and a pressure stabilizing pipe 1-8; the air inlet 1-1 is provided on the air inlet pipe 1-2; the first air supply pipe 1-3 is located at the upper end of the air inlet pipe 1-2; a first air supply valve 1-3-1 is provided on the left side of the first air supply pipe 1-3; the second air supply pipe 1-4 is located at the lower end of the air inlet pipe 1-2; a second air supply valve 1-4-1 is provided on the left side of the second air supply pipe 1-4; the right end of the first air supply pipe 1-3 is connected to the air inlet end of the first one-way valve 1-5; the second air supply pipe 1-4... The right end is connected to the air inlet of the second one-way valve 1-6; the upper end of the pressure stabilizing branch pipe 1-7 is connected between the first air supply valve 1-3-1 and the first one-way valve 1-5; the lower end of the pressure stabilizing branch pipe 1-7 is connected between the second air supply valve 1-4-1 and the second one-way valve 1-6; one end of the pressure stabilizing pipe 1-8 is connected to the middle of the air inlet pipe 1-2; the other end of the pressure stabilizing pipe 1-8 is connected to the middle of the pressure stabilizing branch pipe 1-7; a pressure stabilizing tank 1-8-1 is provided in the middle of the pressure stabilizing pipe 1-8; a pressure stabilizing and charging valve 1-8-2 is provided on the left side of the pressure stabilizing pipe 1-8; a first pressure stabilizing valve 1-7-1 is provided on the upper part of the pressure stabilizing branch pipe 1-7; a second pressure stabilizing valve 1-7-2 is provided on the lower part of the pressure stabilizing branch pipe 1-7.

[0045] Preferably, the purification unit 2 includes an air blowing pipe 2-1, a first air blowing valve 2-2, a second air blowing valve 2-3, and an air blowing interface 2-4; the first air blowing valve 2-2 is provided at the upper part of the air blowing pipe 2-1; the second air blowing valve 2-3 is provided at the lower part of the air blowing pipe 2-1; and the air blowing interface 2-4 is provided between the first air blowing valve 2-2 and the second air blowing valve 2-3.

[0046] Preferably, the flame-arresting unit 3 includes a first flame-arresting device 3-1, a second flame-arresting device 3-2, a slag discharge pipe 3-3, and a slag discharge port 3-4; the first flame-arresting device 3-1 is located at the upper end of the slag discharge pipe 3-3; the second flame-arresting device 3-2 is located at the lower end of the slag discharge pipe 3-3; the slag discharge port 3-4 is located in the middle of the slag discharge pipe 3-3; a first slag discharge valve 3-5 is provided between the first flame-arresting device 3-1 and the slag discharge port 3-4; and a second slag discharge valve 3-6 is provided between the second flame-arresting device 3-2 and the slag discharge port 3-4.

[0047] Preferably, the outlet of the first one-way valve 1-5 is connected to the upper end of the air blowing pipe 2-1 and the left end of the first flame arrester 3-1 respectively via a three-way pipe; the outlet of the second one-way valve 1-6 is connected to the lower end of the air blowing pipe 2-1 and the left end of the second flame arrester 3-2 respectively via a three-way pipe.

[0048] Preferably, the exhaust unit 4 includes an exhaust pipe 4-1, an exhaust port 4-2, a first exhaust valve 4-3, and a second exhaust valve 4-4; the exhaust port 4-2 is located in the middle of the exhaust pipe 4-1; the first exhaust valve 4-3 is located in the upper part of the exhaust pipe 4-1; and the second exhaust valve 4-4 is located in the lower part of the exhaust pipe 4-1.

[0049] Preferably, the equipment connection unit 5 comprises a first equipment connection valve 5-1, a second equipment connection valve 5-2 and an equipment connection port 5-3; the first equipment connection valve 5-1 is connected with the second equipment connection valve 5-2 through a pipeline; the equipment connection port 5-3 is arranged between the first equipment connection valve 5-1 and the second equipment connection valve 5-2.

[0050] Preferably, the right end of the first fire stopping device 3-1 is connected with the first exhaust valve 4-3 and the first equipment connection valve 5-1 through a tee joint respectively; the right end of the second fire stopping device 3-2 is connected with the second exhaust valve 4-4 and the second equipment connection valve 5-2 through a tee joint respectively.

[0051] Preferably, the control unit 6 comprises a controller 6-1, a constant pressure detection unit 6-2, a first temperature detection unit 6-3, a second temperature detection unit 6-4 and an exhaust pressure detection unit 6-5; the constant pressure detection unit 6-2 is connected with the constant pressure tank 1-8-1; the first temperature detection unit 6-3 is connected with the first fire stopping device 3-1; the second temperature detection unit 6-4 is connected with the second fire stopping device 3-2; the exhaust pressure detection unit 6-5 is connected with the exhaust port 4-2; the controller 6-1 is electrically connected with the constant pressure detection unit 6-2, the first temperature detection unit 6-3, the second temperature detection unit 6-4, the exhaust pressure detection unit 6-5, the first gas supply valve 1-3-1, the second gas supply valve 1-4-1, the constant pressure charging valve 1-8-2, the first constant pressure valve 1-7-1, the second constant pressure valve 1-7-2, the first blowing valve 2-2, the second blowing valve 2-3, the first residue discharge valve 3-5, the second residue discharge valve 3-6, the first exhaust valve 4-3, the second exhaust valve 4-4, the first equipment connection valve 5-1 and the second equipment connection valve 5-2 respectively.

[0052] In this embodiment:

[0053] The controller 6-1 is a PLC controller, the manufacturer is Siemens, and the model is 200smart;

[0054] The constant pressure detection unit 6-2 and the exhaust pressure detection unit 6-5 are pressure sensors, the manufacturer is Yifumen, and the model is PN2594;

[0055] The first temperature detection unit 6-3 and the second temperature detection unit 6-4 are temperature sensors, the manufacturer is Weika, and the model is TC40;

[0056] The first gas supply valve 1-3-1, the second gas supply valve 1-4-1, the pressure stabilizing inflation valve 1-8-2, the first pressure stabilizing valve 1-7-1, the second pressure stabilizing valve 1-7-2, the first inflation valve 2-2, the second inflation valve 2-3, the first slag discharge valve 3-5, the second slag discharge valve 3-6, the first exhaust valve 4-3, the second exhaust valve 4-4, the first equipment connection valve 5-1 and the second equipment connection valve 5-2 are electromagnetic valves, the manufacturer is Yuyao Instrument Factory No. 4, and the model is ZCF-PC-15ES.

[0057] Embodiment 2

[0058] The embodiment provides a use method of the flame continuous cutting operation safety flame arrester control device in embodiment 1, and the method comprises the following steps:

[0059] First step: all valves are closed, the gas inlet 1-1 is connected with the combustible gas, the inflation interface 2-4 is connected with the inflation device, and the equipment connection interface 5-3 is connected with the gas equipment;

[0060] Second step: the device is opened, the controller 6-1 controls the pressure stabilizing inflation valve 1-8-2 to be opened, combustible gas enters the pressure stabilizing pipe 1-8, and the pressure stabilizing tank 1-8-1 is inflated;

[0061] Third step: when the pressure stabilizing pressure detection unit 6-2 detects that the gas pressure in the pressure stabilizing tank 1-8-1 reaches a certain value, the controller 6-1 controls the pressure stabilizing inflation valve 1-8-2 to be closed, and controls the first gas supply valve 1-3-1 and the first equipment connection valve 5-1 to be opened;

[0062] Fourth step: combustible gas passes through the first gas supply pipe 1-3 and the first flame arrester 3-1, and finally reaches the gas equipment from the equipment connection interface 5-3 through the first equipment connection valve 5-1.

[0063] Embodiment 3

[0064] The embodiment provides a use method of the flame continuous cutting operation safety flame arrester control device on the basis of embodiment 2, and the method comprises the following steps:

[0065] First step: when backfire occurs, the combustion reaction enters the first flame arrester 3-1 along the pipeline through the first equipment connection valve 5-1, the first temperature detection unit 6-3 detects that the temperature in the first flame arrester 3-1 rises to a set value, the controller 6-1 controls the first gas supply valve 1-3-1 and the first equipment connection valve 5-1 to be closed, and controls the second gas supply valve 1-4-1 and the second equipment connection valve 5-2 to be opened;

[0066] Second step: combustible gas passes through the second gas supply pipe 1-4 and the second flame arrester 3-2, and finally reaches the gas equipment from the equipment connection interface 5-3 through the second equipment connection valve 5-2;

[0067] Third step: the controller 6-1 controls the first blowing valve 2-2 and the first exhaust valve 4-3 to open, the blowing device inputs gas through the blowing interface 2-4 to the first fire arrestor 3-1 to eliminate the combustion reaction, and the first fire arrestor 3-1 is cooled, then the gas enters the exhaust pipe 4-1 through the first exhaust valve 4-3, and finally is discharged from the exhaust port 4-2;

[0068] Fourth step: after the first temperature detection unit 6-3 detects that the temperature of the gas flow in the first fire arrestor 3-1 is reduced to the set value, the controller 6-1 controls the first exhaust valve 4-3 to close and controls the first deslagging valve 3-5 to open at the same time;

[0069] Fifth step: the combustion water vapor in the first fire arrestor 3-1 is discharged through the deslagging port 3-4 along with the gas flow, and then the first deslagging valve 3-5 is closed;

[0070] Sixth step: the controller 6-1 controls the first pressure stabilizing valve 1-7-1 and the first exhaust valve 4-3 to open, and the combustible gas stored in the pressure stabilizing tank 1-8-1 reaches the exhaust pipe 4-1 through the pressure stabilizing branch pipe 1-7, the first one-way valve 1-5, the first fire arrestor 3-1, and then is discharged from the exhaust port 4-2;

[0071] Seventh step: after the controller 6-1 receives the detection of the exhaust pressure detection unit 6-5 that the pressure of the exhaust port 4-2 changes, it is judged that the combustible gas fills the pipeline, and then the controller 6-1 controls the first pressure stabilizing valve 1-7-1 and the first exhaust valve 4-3 to close.

[0072] Example 4

[0073] The embodiment provides a use method of the fire continuous cutting operation safety fire arrestor control device based on the embodiment 3, which comprises the following steps:

[0074] First step: when backfire occurs again, the controller 6-1 controls the second gas supply valve 1-4-1 and the second equipment connection valve 5-2 to close, the first gas supply valve 1-3-1 and the first equipment connection valve 5-1 to open, the combustible gas passes through the first gas supply pipe 1-3 and the first fire arrestor 3-1, and finally reaches the gas using equipment through the first equipment connection valve 5-1 from the equipment connection port 5-3, and then the second fire arrestor 3-2 is cooled and deslagged in the same control execution mode;

[0075] Second step: when the pressure stabilizing pressure detection unit 6-2 detects that the pressure in the pressure stabilizing tank 1-8-1 is reduced to the set value, the control unit 6 controls the pressure stabilizing gas filling valve 1-8-2 to open to fill the combustible gas in the pressure stabilizing tank 1-8-1 during the non-operation period of the gas using equipment, and the controller 6-1 controls the pressure stabilizing gas filling valve 1-8-2 to close after the pressure stabilizing pressure detection unit 6-2 detects that the gas pressure in the pressure stabilizing tank 1-8-1 reaches a certain value.

[0076] In the above embodiments:

[0077] The combustible gas is hydrogen-oxygen mixed gas;

[0078] The blowing device is a compressed air bottle.

[0079] The above is a further detailed description of the present application in combination with specific preferred embodiments, and cannot be deemed as limiting the specific implementation of the present application to these descriptions. For those skilled in the art to which the present application belongs, a number of simple deductions or replacements can be made without departing from the concept of the present application, and all of them should be deemed as falling within the protection scope of the present application.

Claims

1. A flame-cutting operation safety flame-arrest control device, characterized by: It comprises a gas supply unit (1), a purification unit (2), a fire resistance unit (3), an exhaust unit (4), a device connection unit (5) and a control unit (6); The right end of the gas supply unit (1) is connected with the purification unit (2); The right end of the gas supply unit (1) is connected with the fire resistance unit (3); The right end of the fire resistance unit (3) is connected with the exhaust unit (4); The right end of the fire resistance unit (3) is connected with the device connection unit (5); The gas supply unit (1) comprises an air inlet (1-1), an air inlet pipe (1-2), a first gas supply pipe (1-3), a second gas supply pipe (1-4), a first one-way valve (1-5), a second one-way valve (1-6), a pressure stabilizing branch pipe (1-7) and a pressure stabilizing pipe (1-8); The air inlet (1-1) is arranged on the air inlet pipe (1-2); The first gas supply pipe (1-3) is arranged on the upper end of the air inlet pipe (1-2); The left part of the first gas supply pipe (1-3) is provided with a first gas supply valve (1-3-1); The second gas supply pipe (1-4) is arranged on the lower end of the air inlet pipe (1-2); The left part of the second gas supply pipe (1-4) is provided with a second gas supply valve (1-4-1); The right end of the first gas supply pipe (1-3) is connected with the air inlet end of the first one-way valve (1-5); The right end of the second gas supply pipe (1-4) is connected with the air inlet end of the second one-way valve (1-6); The upper end of the pressure stabilizing branch pipe (1-7) is connected between the first gas supply valve (1-3-1) and the first one-way valve (1-5); The lower end of the pressure stabilizing branch pipe (1-7) is connected between the second gas supply valve (1-4-1) and the second one-way valve (1-6); One end of the pressure stabilizing pipe (1-8) is connected to the middle part of the air inlet pipe (1-2); The other end of the pressure stabilizing pipe (1-8) is connected to the middle part of the pressure stabilizing branch pipe (1-7); The middle part of the pressure stabilizing pipe (1-8) is provided with a pressure stabilizing tank (1-8-1); The left part of the pressure stabilizing pipe (1-8) is provided with a pressure stabilizing inflation valve (1-8-2); The upper part of the pressure stabilizing branch pipe (1-7) is provided with a first pressure stabilizing valve (1-7-1); The lower part of the pressure stabilizing branch pipe (1-7) is provided with a second pressure stabilizing valve (1-7-2); The fire resistance unit (3) comprises a first fire resistance device (3-1), a second fire resistance device (3-2), a slag discharge pipe (3-3) and a slag discharge port (3-4); The first fire resistance device (3-1) is arranged on the upper end of the slag discharge pipe (3-3); The second fire resistance device (3-2) is arranged on the lower end of the slag discharge pipe (3-3); The slag discharge port (3-4) is arranged on the middle part of the slag discharge pipe (3-3); The first fire resistance device (3-1) and the slag discharge port (3-4) are provided with a first slag discharge valve (3-5); The second fire resistance device (3-2) and the slag discharge port (3-4) are provided with a second slag discharge valve (3-6); The control unit (6) comprises a controller (6-1), a pressure stabilizing pressure detection unit (6-2), a first temperature detection unit (6-3), a second temperature detection unit (6-4) and an exhaust pressure detection unit (6-5); The pressure stabilizing pressure detection unit (6-2) is connected with the pressure stabilizing tank (1-8-1); The first temperature detection unit (6-3) is connected with the first fire blocking device (3-1); The second temperature detection unit (6-4) is connected with the second fire blocking device (3-2); The exhaust pressure detection unit (6-5) is connected with the exhaust port (4-2); The controller (6-1) is electrically connected with the stable pressure detection unit (6-2), the first temperature detection unit (6-3), the second temperature detection unit (6-4), the exhaust pressure detection unit (6-5), the first gas supply valve (1-3-1), the second gas supply valve (1-4-1), the stable gas filling valve (1-8-2), the first stable pressure valve (1-7-1), the second stable pressure valve (1-7-2), the first blowing valve (2-2), the second blowing valve (2-3), the first slag discharge valve (3-5), the second slag discharge valve (3-6), the first exhaust valve (4-3), the second exhaust valve (4-4), the first equipment connection valve (5-1) and the second equipment connection valve (5-2) respectively.

2. The flame-cutting operation safety flame control apparatus according to claim 1, wherein: The purifying unit (2) comprises a blowing pipe (2-1), a first blowing valve (2-2), a second blowing valve (2-3) and a blowing interface (2-4); The upper part of the blowing pipe (2-1) is provided with the first blowing valve (2-2); The lower part of the blowing pipe (2-1) is provided with the second blowing valve (2-3); The blowing interface (2-4) is arranged between the first blowing valve (2-2) and the second blowing valve (2-3).

3. The flame-cutting operation safety flame arrest control device according to claim 2, wherein: The gas outlet end of the first one-way valve (1-5) is connected with the upper end of the blowing pipe (2-1) and the left end of the first fire blocking device (3-1) through a three-way pipe; The gas outlet end of the second one-way valve (1-6) is connected with the lower end of the blowing pipe (2-1) and the left end of the second fire blocking device (3-2) through a three-way pipe.

4. The flame-cutting operation safety flame control apparatus according to claim 1, wherein: The exhaust unit (4) comprises an exhaust pipe (4-1), an exhaust port (4-2), a first exhaust valve (4-3) and a second exhaust valve (4-4); The exhaust port (4-2) is arranged in the middle part of the exhaust pipe (4-1); The first exhaust valve (4-3) is arranged in the upper part of the exhaust pipe (4-1); The second exhaust valve (4-4) is arranged in the lower part of the exhaust pipe (4-1).

5. The flame-cutting operation safety flame arrest control device according to claim 4, wherein: The equipment connection unit (5) comprises a first equipment connection valve (5-1), a second equipment connection valve (5-2) and an equipment connection port (5-3); The first equipment connection valve (5-1) and the second equipment connection valve (5-2) are connected through a pipeline; The equipment connection port (5-3) is arranged between the first equipment connection valve (5-1) and the second equipment connection valve (5-2).

6. A flame-cutting operation safety flame control device according to claim 5, wherein: The right end of the first fire blocking device (3-1) is connected with the first exhaust valve (4-3) and the first equipment connection valve (5-1) through a three-way pipe; The right end of the second fire blocking device (3-2) is connected with the second exhaust valve (4-4) and the second equipment connection valve (5-2) through a three-way pipe.

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