Flame arrester detection table

Abstract

The utility model relates to a flame arrester detection platform, which is used for testing the performance of a flame arrester and comprises an air inlet device, a combustible gas inlet device, a gas mixing chamber and a combustion chamber, the air inlet device and the combustible gas inlet device are both connected with the gas mixing chamber, and the gas outlet side of the gas mixing chamber is hermetically connected with the flame arrester to be tested. A flame detection device is arranged on the gas outlet side of the gas mixing chamber, the gas mixing chamber is connected with a combustion chamber containing the flame arrester in a sealed mode, and an igniter and a combustible gas detection device are arranged on the side wall of the combustion chamber. The flame arrester detection platform can perform explosion resistance test and burning resistance test on the flame arrester, does not need to independently replace equipment, and is simple to operate, accurate in detection and high in efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of flame arrester detection, and particularly relates to a flame arrester detection bench. Background Art

[0002] The petroleum storage tank flame arrester is used for storage tanks of light oil products such as crude oil, gasoline and kerosene. Its function is to prevent open fire from spreading from one end of the flame arrester to the other end. Therefore, the performance requirements of the flame arrester are very strict. The performance test of the flame arrester is mainly divided into two parts: explosion prevention test and fire resistance test.

[0003] For the explosion prevention test of the flame arrester, combustible gas (air mixed with propane) is filled into the inlet side of the flame arrester until the concentration of combustible gas on the outlet side reaches a certain value (propane volume concentration of 4.3% ± 0.2%), and then it is ignited on the outlet side. The mixed gas on the outlet side undergoes deflagration, and it is observed whether there is flame or deflagration on the inlet side (the inlet side and the outlet side of the flame arrester are always conducting). If there is no flame on the inlet side after 13 consecutive inflation and ignition tests, the explosion prevention performance of the flame arrester is qualified.

[0004] For the fire resistance test of the flame arrester, combustible mixed gas (propane volume concentration of 4% ± 0.4%) is continuously filled into the inlet side of the flame arrester, and then it is ignited on the outlet side. If there is no flame on the inlet side of the flame arrester after continuous combustion for 1 hour, the fire resistance performance is qualified. Content of the Utility Model

[0005] The embodiment of the utility model provides a flame arrester detection bench to solve the problem that the performance of the flame arrester cannot be well detected in the prior art.

[0006] To achieve the above purpose, the embodiment of the utility model provides the following technical solutions:

[0007] A flame arrester detection bench for the performance test of a flame arrester includes an air inlet device, a combustible gas inlet device, a mixing chamber, and a combustion chamber. The air inlet device and the combustible gas inlet device are both connected to the mixing chamber. The outlet side of the mixing chamber is hermetically connected to the flame arrester to be tested. A flame detection device is provided on the outlet side of the mixing chamber. The mixing chamber is hermetically connected to the combustion chamber that houses the flame arrester. An igniter and a combustible gas detection device are provided on the side wall of the combustion chamber.

[0008] Further, the air inlet device includes an air pipe, and an air flow meter and an air solenoid valve are provided on the air pipe.

[0009] Further, the combustible gas inlet device includes a combustible gas pipe, and a combustible gas flow meter and a combustible gas solenoid valve are provided on the combustible gas pipe.

[0010] Further, a rupture disc is provided on the mixing chamber.

[0011] Furthermore, a gas flame arrester device is provided outside the rupture disc on the mixing chamber.

[0012] Furthermore, graphite gaskets are used for sealing between the mixing chamber and the flame arrester, and between the mixing chamber and the combustion chamber.

[0013] Furthermore, a plurality of igniters are evenly arranged on one side of the combustion chamber from top to bottom.

[0014] Furthermore, the combustible gas detection device includes an air outlet pipe connected to the combustion chamber, and a combustible gas concentration sensor and an air outlet solenoid valve are provided on the air outlet pipe.

[0015] Furthermore, air vent holes and a pressure relief sleeve for blocking the air vent holes are provided on the side wall of the combustion chamber.

[0016] Furthermore, an observation hole is provided on the side wall of the combustion chamber.

[0017] The embodiments of the present utility model have the following advantages:

[0018] The flame arrester detection bench of the present utility model can perform explosion prevention tests and burning resistance tests on the flame arrester, without the need to separately replace equipment, is easy to operate, has accurate detection and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0020] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limited conditions under which the present utility model can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed by the present utility model.

[0021] Figure 1 It is a product structure diagram of a flame arrester detection bench provided by an embodiment of the present utility model;

[0022] Figure 2 It is an internal structure diagram of a flame arrester detection bench provided by an embodiment of the present utility model.

[0023] In the figure:

[0024] 1. Mixing chamber; 2. Combustion chamber; 3. Flame arrester; 4. Igniter; 5. Air pipe; 6. Air flow meter; 7. Air solenoid valve; 8. Combustible gas pipe; 9. Combustible gas flow meter; 10. Combustible gas solenoid valve; 11. Bursting disc; 12. Gas flame arrester device; 13. Reducing flange; 14. Outlet pipe; 15. Combustible gas concentration sensor; 16. Outlet solenoid valve; 17. Vent hole; 18. Observation hole; 19. Flame detection device. Detailed implementation manners

[0025] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. Based on the embodiments in 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.

[0026] As Figure 1 shown, a flame arrester detection bench for performance testing of the flame arrester 3 includes an air intake device, a combustible gas intake device, a mixing chamber 1, and a combustion chamber 2. The air intake device and the combustible gas intake device are both connected to the mixing chamber 1. The outlet side of the mixing chamber 1 is sealingly connected to the flame arrester 3 to be tested. A flame detection device 19 is provided on the outlet side of the mixing chamber 1. The mixing chamber 1 is sealingly connected to the combustion chamber 2 that houses the flame arrester 3. An igniter 4 and a combustible gas detection device are provided on the side wall of the combustion chamber 2. In this embodiment, the flame detection device 19 is a flame sensor.

[0027] The air intake device includes an air pipe 5. An air flow meter 6 and an air solenoid valve 7 are provided on the air pipe 5. The air pipe 5 is connected to an air gas source. The air flow meter 6 detects the air flow rate for calculating the concentration of the mixed gas. The air solenoid valve 7 is used for opening and closing the air pipe 5.

[0028] The combustible gas intake device includes a combustible gas pipe 8. A combustible gas flow meter 9 and a combustible gas solenoid valve 10 are provided on the combustible gas pipe 8. The combustible gas pipe 8 is connected to a combustible gas source. In this embodiment, the combustible gas is propane. The combustible gas flow meter 9 detects the combustible gas flow rate for calculating the concentration of the mixed gas. The combustible gas solenoid valve 10 is used for opening and closing the combustible gas pipe 8.

[0029] A bursting disc 11 is provided on the mixing chamber 1, which is used to open when an accidental deflagration occurs in the mixing chamber 1 and the explosion pressure is too high, and it can discharge the bursting pressure.

[0030] A gas mixing chamber 1 is provided with a gas flame arrester 12 outside the bursting disc 11. When the bursting disc 11 of the gas mixing chamber 1 is opened and gas is discharged downward, the gas flame arrester 12 is used to prevent open fire from leaking outside the experimental equipment, avoiding accidental fires.

[0031] The gas mixing chamber 1 and the flame arrester 3 can be installed together through a matching reducer flange 13. The detachable reducer flange 13 can be adapted to different models of flame arresters 3, and the connection part between the two is installed with bolts. The combustion chamber 2 can be realized by setting an ignition isolation cover, and the ignition isolation cover is detachably and hermetically connected to the gas mixing chamber 1 or external equipment of the gas mixing chamber 1, such as detachable fixing structures like buckles, quick releases, bolts, etc. First, install the flame arrester 3 and then install the ignition isolation cover, so that the combustion chamber 2 communicates with the gas mixing chamber 1 through the flame arrester 3. Graphite gaskets are used for sealing between the gas mixing chamber 1 and the flame arrester 3, and between the gas mixing chamber 1 and the combustion chamber 2.

[0032] A plurality of igniters 4 are evenly arranged on one side of the combustion chamber 2 from top to bottom to fully ignite the combustible gas in the combustion chamber 2, so as to reduce the emission of combustible gas.

[0033] The combustible gas detection device includes an outlet pipe 14 connected to the combustion chamber 2, and a combustible gas concentration sensor 15 and an outlet gas solenoid valve 16 are provided on the outlet pipe 14. The combustible gas detection device is preferably arranged at the top of the combustion chamber 2. When the detected combustible gas concentration meets the detection conditions, the gas conditions in the combustion chamber 2 must be satisfied.

[0034] A vent hole 17 and a pressure relief sleeve for plugging the vent hole 17 are provided on the side wall of the combustion chamber 2. In this embodiment, the pressure relief sleeve is made of a plastic bag. The combustion chamber 2 is provided with an annular convex structure for fixing the plastic bag at the position of the vent hole 17. After the plastic bag is sleeved on the annular convex structure, it is fixed by an annular clip or an elastic band.

[0035] An observation hole 18 is provided on the side wall of the combustion chamber 2, and an explosion-proof glass is used on the observation hole 18 for visually observing the experimental process.

[0036] 1. Deflagration prevention test

[0037] Open the air solenoid valve 7, the combustible gas solenoid valve 10 and the outlet gas solenoid valve 16, and fill the mixing chamber with mixed gas. When the combustible gas concentration sensor 15 detects that the concentration of the discharged combustible gas reaches the experimental concentration, such as the concentration of propane is between 4.3% ± 0.2%, close the air solenoid valve 7, the combustible gas solenoid valve 10 and the outlet gas solenoid valve 16. Then the igniter 4 is started to ignite the gas in the combustion chamber 2, and deflagration occurs. The pressure relief sleeve of the vent hole 17 is broken for pressure relief. When deflagration occurs, the flame detection device 19 in the gas mixing chamber 1 detects whether there is a flame in the gas mixing chamber 1. If no flame is detected, the flame arrest test of the flame arrester 3 is successful.

[0038] After the experiment is completed, open the air solenoid valve 7 to purge the gas mixing chamber 1 and the combustion chamber 2. After the purging is completed, repeat the detection. Repeat the above explosion suppression test 13 times. If all 13 tests are successful, the explosion suppression performance of the flame arrester 3 to be detected is qualified.

[0039] 2. Burn resistance experiment

[0040] Open the air solenoid valve 7, the combustible gas solenoid valve 10 and the outlet solenoid valve 16 to fill the mixing chamber with the mixed gas. When the combustible gas concentration sensor 15 detects that the concentration of the combustible gas discharged reaches the experimental concentration, such as the concentration of propane being between 4% ± 0.4%, close the outlet solenoid valve 16, and keep the air solenoid valve 7 and the combustible gas solenoid valve 10 open, and continuously input the mixed gas into the experimental equipment. Then the igniter 4 is started to ignite the gas in the combustion chamber 2, and deflagration occurs. The pressure relief sleeve of the vent hole 17 is broken for pressure relief. When deflagration occurs, the flame detection device 19 in the gas mixing chamber 1 detects whether there is a flame in the gas mixing chamber 1. The experiment lasts for 1 hour. If the flame sensor in the gas mixing chamber 1 does not detect a flame in the gas mixing chamber 1 during the process, the burn resistance experiment is qualified. After the experiment is completed, close the propane solenoid valve and use compressed air to purge the equipment.

[0041] Although the present invention has been described in detail with general descriptions and specific embodiments above, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A flame arrester testing bench for the performance test of a flame arrester, characterized in that: It includes an air intake device, a combustible gas intake device, a mixing chamber, and a combustion chamber. The air intake device and the combustible gas intake device are both connected to the mixing chamber. The outlet side of the mixing chamber is hermetically connected to the flame arrester to be tested. A flame detection device is provided on the outlet side of the mixing chamber. The mixing chamber is hermetically connected to the combustion chamber that houses the flame arrester. An igniter and a combustible gas detection device are provided on the side wall of the combustion chamber.

2. The flame arrester detection bench according to claim 1, characterized in that: The air intake device includes an air pipe, and an air flow meter and an air solenoid valve are provided on the air pipe.

3. The flame arrester detection bench according to claim 1, characterized in that: The combustible gas intake device includes a combustible gas pipe, and a combustible gas flow meter and a combustible gas solenoid valve are provided on the combustible gas pipe.

4. A flame arrester detection bench according to claim 1, characterized in that: A rupture disc is provided on the mixing chamber.

5. The flame arrester detection bench according to claim 4, characterized in that: A gas flame arrester device is provided outside the rupture disc on the mixing chamber.

6. The flame arrester detection bench according to claim 1, characterized in that: Graphite gaskets are used for sealing between the mixing chamber and the flame arrester, and between the mixing chamber and the combustion chamber.

7. A flame arrester detection bench according to claim 1, characterized in that: A plurality of igniters are evenly arranged from top to bottom on one side of the combustion chamber.

8. A flame arrester detection bench according to claim 1, characterized in that: The combustible gas detection device includes an outlet pipe connected to the combustion chamber, and a combustible gas concentration sensor and an outlet solenoid valve are provided on the outlet pipe.

9. The flame arrester detection bench according to claim 1, characterized in that: A vent hole and a pressure relief sleeve for plugging the vent hole are provided on the side wall of the combustion chamber.

10. A flame arrester detection bench according to claim 1, characterized in that: An observation hole is provided on the side wall of the combustion chamber.

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