CN113532867B - Explosion-proof performance testing device for air inlet and outlet system of explosion-proof internal combustion engine - Google Patents
Explosion-proof performance testing device for air inlet and outlet system of explosion-proof internal combustion engine Download PDFInfo
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- CN113532867B CN113532867B CN202110675257.7A CN202110675257A CN113532867B CN 113532867 B CN113532867 B CN 113532867B CN 202110675257 A CN202110675257 A CN 202110675257A CN 113532867 B CN113532867 B CN 113532867B
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- 238000012360 testing method Methods 0.000 title claims abstract description 116
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 87
- 238000004880 explosion Methods 0.000 claims abstract description 62
- 238000009826 distribution Methods 0.000 claims description 30
- 238000004088 simulation Methods 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 4
- 238000011056 performance test Methods 0.000 claims 2
- 239000010408 film Substances 0.000 description 14
- 239000002360 explosive Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000011160 research Methods 0.000 description 2
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- 239000003208 petroleum Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
- G01M15/102—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases
- G01M15/106—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases using pressure sensors
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Abstract
The invention relates to the technical field of explosion-proof internal combustion engine testing, and discloses an explosion-proof performance testing device for an air inlet and outlet system of an explosion-proof internal combustion engine. The testing device meets the standard requirements, and can perform a maximum explosion pressure test, a dynamic overpressure test and an internal ignition non-explosion propagation test.
Description
Technical Field
The invention relates to the technical field of explosion-proof internal combustion engine testing, in particular to an explosion-proof performance testing device for an air inlet and outlet system of an explosion-proof internal combustion engine.
Background
The explosion-proof internal combustion engine is widely applied to explosive dangerous environments such as petrochemical industry, coal mine and the like due to high power and convenient use and maintenance. The explosion-proof performance of the air intake and exhaust system is a key factor influencing the safety performance of the explosion-proof internal combustion engine, and in order to avoid the explosion-proof internal combustion engine becoming an ignition source of an external explosive environment, flame arresters are generally additionally arranged at the air intake end and the air exhaust end of the explosion-proof internal combustion engine to prevent flames in the internal combustion engine from being transmitted to the outside. Flame arresters are therefore the most critical safety device in the intake and exhaust systems.
At present, researches on flame arrester test devices mainly focus on petroleum pipeline flame arresters, and researches on flame arrester test devices of explosion-proof internal combustion engines are relatively few. The internal explosion-proof internal combustion engine air intake and exhaust system is generally tested according to explosion standard GB 20800.1-2006, and test items mainly comprise a maximum explosion pressure test, a dynamic overpressure test, an internal ignition non-explosion-propagation test and a pipeline air tightness test, wherein the three items of the maximum explosion pressure test, the overpressure test and the internal ignition non-explosion-propagation test are the most critical. However, the method specified in GB 20800.1-2006 is a general guideline and requirement, and in practical test applications, the test apparatus needs to be designed and optimised according to standard guidelines.
Disclosure of Invention
The purpose of the invention is that: a testing device is designed for detecting explosion-proof performance of an air inlet and outlet system of an explosion-proof internal combustion engine.
In order to achieve the above purpose, the invention provides an explosion-proof performance testing device for an air inlet and outlet system of an explosion-proof internal combustion engine, which comprises an explosion-proof tank body with an opening at one end, an air distribution system and a controller, wherein the air distribution system is arranged outside the explosion-proof tank body, the explosion-proof tank body is provided with a film for sealing the opening, a test sample machine is arranged in the explosion-proof tank body, the air distribution system is provided with a first pipeline, the first pipeline penetrates through the side wall of the explosion-proof tank body, is arranged in the explosion-proof tank body and is connected with the test sample machine, and the air distribution system is electrically connected with the controller.
As the preferred scheme, the opening part is equipped with annular end cover, the edge of annular end cover is equipped with the sealing washer, the one end of annular end cover with antiknock jar body articulates, the other end of annular end cover is equipped with the padlock, the padlock includes buckle and handle, antiknock jar body be equipped with the padlock cooperation locking the latch hook of end cover, the buckle lock joint in the latch hook and through the handle is taut, the annular end cover is equipped with and is used for the through-hole that the film passed.
As a preferred scheme, the experimental prototype comprises a simulation cylinder, an internal combustion engine air inlet flame arrester, a second pipeline and an internal combustion engine exhaust flame arrester, wherein the simulation cylinder comprises a combustion chamber, an air inlet manifold and an exhaust manifold, the internal combustion engine air inlet flame arrester is connected with the air inlet manifold through a connecting pipeline, one end of the second pipeline is connected with the exhaust manifold, and the other end of the second pipeline is connected with the internal combustion engine exhaust flame arrester.
As a preferable scheme, the combustion chamber is provided with an igniter, a first pressure sensor and a second pressure sensor, the first pressure sensor and the second pressure sensor are arranged on two sides of the igniter, the distance between the first pressure sensor and the igniter is smaller than the distance between the second pressure sensor and the igniter, and the first pressure sensor and the second pressure sensor are electrically connected with the controller.
As a preferred scheme, the anti-explosion tank further comprises an ignition module, wherein the ignition module is arranged outside the anti-explosion tank body and is electrically connected with the igniter and the controller.
Preferably, the test prototype further comprises a third pressure sensor, and the third pressure sensor is arranged at one end of the connecting pipeline or one end of the second pipeline, which is close to the exhaust flame arrester of the internal combustion engine.
As a preferable scheme, the side wall of the antiknock tank body is provided with a fourth pressure sensor, and the fourth pressure sensor is electrically connected with the controller.
As the preferred scheme, the distribution module includes air channel, explosion gas channel, mixed gas channel and gas detection passageway, air channel and explosion gas channel with the mixed gas channel is connected, the mixed gas channel with first pipeline connection, the air channel is from the air inlet extremely the mixed gas channel is equipped with filter, compressor, air storage tank, first electromagnetic relief pressure valve, first mass flow controller, first solenoid valve and first check valve in proper order, the explosion gas channel includes the gas cylinder, the explosion gas channel follows the gas cylinder extremely the mixed gas channel is equipped with first manual valve, second electromagnetic relief pressure valve, second mass flow controller, second solenoid valve and second check valve in proper order, the mixed gas channel is equipped with the air chamber, air channel and explosion gas channel with the air chamber is connected, the mixed gas channel follows mix extremely first pipeline is equipped with third check valve, first safety fire arrestor and second manual valve in proper order, the gas detection channel is located the anti-explosion tank is external to be close to the opening, gas detection channel is connected with third solenoid valve, fourth electromagnetic relief pressure valve, first electromagnetic relief pressure controller, second electromagnetic valve and second electromagnetic relief pressure controller.
As a preferable scheme, the side wall of the antiknock tank body is provided with an exhaust port, and the exhaust port is communicated with the gas detection channel.
Preferably, the internal combustion engine intake flame arrester is connected with the connecting pipeline, the second pipeline is connected with the exhaust manifold, and the second pipeline is connected with the internal combustion engine exhaust flame arrester through flanges.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
The explosion-proof performance testing device for the air inlet and outlet systems of the explosion-proof internal combustion engine comprises an explosion-proof tank body with one end closed, an air distribution system and a controller, wherein the air distribution system is arranged outside the explosion-proof tank body and is electrically connected with the controller, the air distribution system can be controlled by the controller to realize automatic air distribution, a test sample machine in the explosion-proof tank body is introduced through a first pipeline, a film is arranged at the opening of the explosion-proof tank body, and pressure can be released during explosion, so that the strength requirement of the explosion-proof tank body can be reduced, and the test result can be observed.
Drawings
FIG. 1 is a schematic overall structure of an embodiment of the present invention;
FIG. 2 is an enlarged view of section A of an embodiment of the present invention;
FIG. 3 is a bottom view of a simulated cylinder according to an embodiment of the invention;
FIG. 4 is a schematic diagram of a test prototype of an air inlet end test according to an embodiment of the present invention.
In the figure:
1. An antiknock tank; 1a, locking hook; 1b, an exhaust port; 2. a controller; 3. a film; 4. a first pipe; 5. an annular end cap; 5a, through holes; 6. a seal ring; 7. locking; 7a, a clasp ring; 7b, a handle; 8. simulating a cylinder; 8a, a combustion chamber; 8b, an intake manifold; 8c, an exhaust manifold; 9. a second pipe; 10. exhaust flame arresters for internal combustion engines; 11. an igniter; 12. a first pressure sensor; 13. a second pressure sensor; 14. a third pressure sensor; 15. an ignition module; 16. a connecting pipe; 17. intake flame arresters for internal combustion engines; 18. a third electromagnetic valve; 19. a gas analyzer; 20. a fourth one-way valve; 21. a second safety flame arrestor; 22. a fourth pressure sensor; 23. a filter; 24. a compressor; 25. an air storage tank; 26. a first electromagnetic pressure reducing valve; 27. a first mass flow controller; 28. a first electromagnetic valve; 29. a first one-way valve; 30. a gas cylinder; 31. a first manual valve; 32. a second electromagnetic pressure reducing valve; 33. a second mass flow controller; 34. a second electromagnetic valve; 35. a second one-way valve; 36. a mixing chamber; 37. a third one-way valve; 38. a first safety flame arrestor; 39. a second manual valve; 40. and (3) a flange.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "inner", "outer", etc. in the present invention are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. The terms "first," "second," "third," "fourth," and the like are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be understood that the terms "connected," "fixed," and the like are used in the present invention in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; the mechanical connection can be realized, and the welding connection can be realized; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1, an explosion-proof performance testing device for an air intake and exhaust system of an explosion-proof internal combustion engine according to a preferred embodiment of the present invention includes an explosion-proof tank 1 having an opening at one end, an air distribution system and a controller 2, wherein the air distribution system is disposed outside the explosion-proof tank 1, the explosion-proof tank 1 is provided with a film 3 for sealing the opening, a test sample machine is disposed in the explosion-proof tank 1, the air distribution system is provided with a first pipe 4, the first pipe 4 passes through a side wall of the explosion-proof tank 1 and is disposed in the explosion-proof tank 1 and is connected with the test sample machine, and the air distribution system is electrically connected with the controller 2. Specifically, the controller 2 includes a computer and a data acquisition and control module.
The invention discloses an explosion-proof performance testing device for an air inlet and outlet system of an explosion-proof internal combustion engine, which comprises an explosion-proof tank body 1 with one end closed, an air distribution system and a controller 2, wherein the air distribution system is arranged outside the explosion-proof tank body 1 and is electrically connected with the controller 2, the air distribution system can be controlled by the controller 2 to realize automatic air distribution, a test sample machine in the explosion-proof tank body 1 is introduced through a first pipeline 4, a film 3 is arranged at the opening of the explosion-proof tank body 1, and pressure can be released during explosion, so that the strength requirement of the explosion-proof tank body 1 can be reduced, and the test result can be observed.
Further, as shown in fig. 2, the opening is provided with an annular end cover 5, a sealing ring 6 is arranged at the edge of the annular end cover 5, one end of the annular end cover 5 is hinged with the antiknock can body 1, the other end of the annular end cover 5 is provided with a buckling lock 7, the buckling lock 7 comprises a buckling ring 7a and a handle 7b, the antiknock can body 1 is provided with a locking hook 1a matched with the buckling lock 7 to lock the end cover, the buckling ring 7a is buckled on the locking hook 1a and is tensioned through the handle 7b, and the annular end cover 5 is provided with a through hole 5a for the thin film 3 to pass through. Through the connected mode of padlock 7 and latch hook 1a, be convenient for open and close annular end cover 5, film 3 compresses tightly through annular end cover 5 and sealing washer 6, realizes the sealing to antiknock jar body 1, and annular end cover 5 is equipped with through-hole 5a, thereby the film 3 can pass through-hole 5a and expand release pressure after the explosion, consequently can reduce the requirement to antiknock jar body 2 structure, and then reduce cost, also be convenient for to the observation of the inside ignition non-propagation explosion test result. Specifically, the axial projection shape of the through hole 5a is a circle.
Further, the experimental prototype comprises a simulation cylinder 8, an internal combustion engine air intake flame arrester 17, a second pipeline 9 and an internal combustion engine exhaust flame arrester 10, wherein the simulation cylinder 8 comprises a combustion chamber 8a, an air intake manifold 8b and an exhaust manifold 8c, the internal combustion engine air intake flame arrester 17 is connected with the air intake manifold 8b through a connecting pipeline 16, one end of the second pipeline 9 is connected with the exhaust manifold 8c, and the other end of the second pipeline 9 is connected with the internal combustion engine exhaust flame arrester 10. The structure of the test prototype meets national standard requirements, the maximum explosion pressure test comprises an air inlet end test and an air outlet end test of the internal combustion engine, when the air inlet end test is carried out, the first pipeline 4 is connected to one end, close to the air outlet flame arrester 10 of the internal combustion engine, of the second pipeline 9, when the air outlet end test is carried out, the first pipeline 4 is connected to the connecting pipeline 16, and before the test is carried out, mixed gas is introduced into the simulated cylinder 8 and the antiknock tank 1 through the first pipeline 4, so that test conditions are met.
Further, as shown in fig. 1, 3 and 4, the combustion chamber 8a is provided with an igniter 11, a first pressure sensor 12 and a second pressure sensor 13, the first pressure sensor 12 and the second pressure sensor 13 are provided on both sides of the igniter 11, the distance between the first pressure sensor 12 and the igniter 11 is smaller than the distance between the second pressure sensor 13 and the igniter 11, and the first pressure sensor 12 and the second pressure sensor 13 are electrically connected with the controller 2. Specifically, in performing an intake end test of the internal combustion engine, the igniter 11 and the first pressure sensor 12 should be disposed on the combustion chamber 8a of the dummy cylinder near the exhaust manifold 8c, and the second pressure sensor 13 should be disposed on the combustion chamber 8a of the dummy cylinder near the intake manifold 8 b; in the exhaust end test of the internal combustion engine, the igniter 11 and the first pressure sensor 12 should be arranged on the combustion chamber 8a of the simulation cylinder near the intake manifold 8b, and the second pressure sensor 13 should be arranged on the combustion chamber 8a of the simulation cylinder near the exhaust manifold 8 c; the explosion pressure in the test prototype is detected by the first pressure sensor 12 and the second pressure sensor 13, and the data is collected by the controller 2, so that a plurality of tests are conveniently carried out.
Further, the anti-explosion tank further comprises an ignition module 15, wherein the ignition module 15 is arranged outside the anti-explosion tank body 1, and the ignition module 15 is electrically connected with the igniter 11 and the controller 2. The ignition module 15 is internally provided with a high-pressure bag (not shown in the figure), the ignition module 15 is arranged outside the antiknock tank body 1, the high-pressure bag is protected, and the ignition module 15 is controlled by the controller 2 to control the igniter 11 to ignite, so that a test is performed.
Further, as shown in fig. 1 and 4, the test prototype further comprises a third pressure sensor 14, and the third pressure sensor 14 is disposed at one end of the connecting pipe 16 or the second pipe 9 near the internal combustion engine exhaust flame arrester 10. When the air inlet end test of the internal combustion engine is carried out, the third pressure sensor 17 is arranged on the connecting pipeline 16; when an exhaust end test of the internal combustion engine is performed, the third pressure sensor 14 is provided at an end of the second pipe 9 close to the exhaust flame arrester 10 of the internal combustion engine for detecting the pressure at the time of explosion.
Further, a fourth pressure sensor 22 is arranged on the side wall of the antiknock tank body 1, and the fourth pressure sensor 22 is electrically connected with the controller 2. The fourth pressure sensor 22 can detect the pressure of the antiknock tank 1, and when the pressure of the antiknock tank 1 reaches the test requirement, the test can be performed.
Further, the gas distribution module comprises an air channel, an explosion gas channel, a mixed gas channel and a gas detection channel, wherein the air channel and the explosion gas channel are connected with the mixed gas channel, the mixed gas channel is connected with the first pipeline 4, the air channel is sequentially provided with a filter 23, a compressor 24, an air storage tank 25, a first electromagnetic pressure reducing valve 26, a first mass flow controller 27, a first electromagnetic valve 28 and a first one-way valve 29 from the air inlet to the mixed gas channel, the explosion gas channel comprises a gas cylinder 30, the explosion gas channel is sequentially provided with a first manual valve 31, a second electromagnetic pressure reducing valve 32, a second mass flow controller 33, a second electromagnetic valve 34 and a second one-way valve 35 from the gas cylinder 30 to the mixed gas channel, the mixed gas channel is provided with a gas mixing chamber 36, the mixed gas channel is sequentially provided with a third one-way valve 37, a first safety flame arrester 38 and a second manual valve 39 from the gas mixing chamber 36 to the first pipeline 4, the gas detection channel is arranged outside the anti-explosion tank 1 and is close to an opening, and the gas detection channel is sequentially connected with a third electromagnetic valve 18, a gas analyzer 19, a fourth one-way valve 20, a second safety pressure arrester 20, a second safety valve 21, a second electromagnetic pressure reducer 21, a second electromagnetic valve 34, a second electromagnetic pressure reducer 34 and a second electromagnetic valve 34 are sequentially connected with the third electromagnetic pressure reducing valve 32, the first electromagnetic valve 27, the second electromagnetic pressure reducer and the second electromagnetic valve 32. A filter 23, a compressor 24, an air reservoir 25 for filtering, compressing and storing air; the first electromagnetic pressure reducing valve 26 and the second electromagnetic pressure reducing valve 32 are used for reducing the pressure of air and explosive gas to meet the test requirement; the first mass flow controller 27 and the second mass flow controller 33 integrate a mass flowmeter and a mass flow control actuator, and can realize mass flow measurement and flow control of gas; the first electromagnetic valve 28, the second electromagnetic valve 34 and the third electromagnetic valve 18 are used for controlling the on-off of gas; the first check valve 29, the second check valve 35, the third check valve 37 and the fourth check valve 20 are for preventing the back flow of the gas; the first manual valve 31 and the second manual valve 39 are used for manually controlling the on-off of gas, the first safety flame arrestor 38 and the second safety flame arrestor 21 can prevent flame from spreading, and the gas analyzer 19 can detect the gas concentration. Air and explosive gas enter the mixing chamber 36 after being decompressed and flow-controlled, after being mixed into mixed gas meeting requirements, the second manual valve 39 is opened to enable the mixed gas to enter the test sample machine and the antiknock tank 1 through the first pipeline 4, the concentration of the mixed gas in the antiknock tank 1 is detected through the gas detection channel until the concentration and the pressure of the mixed gas in the antiknock tank 1 meet the requirements, and the second manual valve 39 is closed.
Further, the side wall of the antiknock tank 1 is provided with an exhaust port 1b, and the exhaust port 1b is communicated with the gas detection channel. When the gas distribution is carried out before the test, the third electromagnetic valve 18 is opened, so that the gas in the anti-explosion tank body 1 is led to the gas outlet 1b, the gas analyzer 19 can detect the concentration of the mixed gas, and when the concentration required by the test is reached, the data of the gas analyzer 19 are collected by the controller 2 and control the third electromagnetic valve 18 to be closed, so that the anti-explosion tank body 1 reaches the concentration required by the test.
Further, the engine intake flame arrestor 17 is connected to the connecting pipe 16, the second pipe 9 is connected to the exhaust manifold 8b, and the second pipe 9 is connected to the first flame arrestor 10 by a flange 40. When the maximum explosion pressure test is carried out, the internal combustion engine exhaust flame arrester 10 or the internal combustion engine intake flame arrester 17 can be closed by a blind flange, so that the internal combustion engine air inlet end test or the exhaust end test can be respectively carried out.
The testing process of the invention is as follows: firstly, performing a maximum explosion pressure test, including an air inlet end test and an air outlet end test of an internal combustion engine, if the air inlet end test is performed, closing an internal combustion engine exhaust flame arrester 10 by using a blind flange, connecting a first pipeline 4 to one end of a second pipeline 9, which is close to the internal combustion engine exhaust flame arrester 10, arranging an igniter 11 and a first pressure sensor 12 on a combustion chamber 8a of a simulation cylinder, which is close to an air outlet manifold 8c, arranging a second pressure sensor 13 on the combustion chamber 8a of the simulation cylinder 8, which is close to an air inlet manifold 8b, and arranging a third pressure sensor 14 on a connecting pipeline 16; when an exhaust end experiment is performed, the internal combustion engine intake flame arrester 17 is closed by a blind flange, the first pipeline 4 is connected to the connecting pipeline 16, the igniter 11 and the first pressure sensor 12 are arranged on the combustion chamber 8a of the simulation cylinder 8 and close to the intake manifold 8b, the second pressure sensor 13 is arranged on the combustion chamber 8a of the simulation cylinder and close to the exhaust manifold 8c, and the third pressure sensor 14 is arranged at one end of the second pipeline 9 close to the internal combustion engine exhaust flame arrester 10. The distance between the joint surface on the test sample machine and the antiknock tank body 1 is more than 300mm, and the opening of the antiknock tank body 1 is closed by the film 3 after the joint surface is connected. Before the test, the controller 2 is set to adopt low-pass filtering of 5X (1+/-10%) kHz, the ambient temperature (0-40 ℃) is guaranteed, the pressure in the antiknock tank body 1 is 0MPa, after the gas distribution is finished, ignition is carried out, the maximum explosion pressure test of the gas end is advanced for 2 times, the maximum explosion pressure test of the gas exhaust end is carried out for 2 times, if the maximum explosion pressure of the gas exhaust end is greater than the maximum explosion pressure of the gas inlet end, the gas exhaust end is increased for 3 times, otherwise, the gas inlet end is increased for 3 times. The maximum value of the test pressure is the maximum explosion pressure. The prototype was purged with at least 6 volumes of test gas to ensure uniform test gas concentration in the prototype.
Secondly, a dynamic overpressure test is carried out, the test is carried out at the position with the maximum explosion pressure, after a test prototype is connected, the first electromagnetic pressure reducing valve 26, the second electromagnetic pressure reducing valve 32, the first mass flow controller 27 and the second mass flow controller 33 are controlled by the controller, so that the antiknock tank 1 is filled with mixed gas with the initial pressure of 50kPa, the initial pressure is measured 22 by the fourth sensor, and ignition and pressure measurement are completed after gas distribution. The dynamic overpressure test is only carried out once, the IIC type equipment needs to be tested for three times, and the tank body after the test is not deformed and damaged to influence the explosion-proof capacity.
Thirdly, performing an internal ignition non-explosion-propagation test, and after a maximum explosion pressure test and a dynamic overpressure test, respectively testing flame arresters at an air inlet end and an air outlet end according to requirements, wherein test installation and connection are the same as those of the maximum explosion pressure test. For the pressurized part of the intake plenum, an internal ignition non-explosion test was performed using a test gas mixture at atmospheric pressure times the pressure of the pressure ratio. All internal ignition non-explosion propagation tests should not be conducted, and the test results can be judged by two methods, the first is to observe whether flame propagation exists at the film through naked eyes or a high-speed camera, and the second is to judge through collecting the pressure value of the fourth pressure sensor 22.
In summary, the embodiment of the invention provides an explosion-proof performance testing device for an air intake and exhaust system of an explosion-proof internal combustion engine, wherein a film is arranged at an opening of an explosion-proof shell, the film is tightly pressed by an end cover and a sealing ring to realize sealing, the end cover is disconnected by a buckling lock or buckled on a lock hook of the explosion-proof shell to realize opening and closing, the operation is simple, the pressure can be released by the film, the requirement of the structure of the explosion-proof shell is reduced, and the test result can be checked by the film. The explosion-proof tank body is internally provided with a test sample machine, the test sample machine is provided with a first pressure sensor, a second pressure sensor and a third pressure sensor, the test sample machine is also provided with an igniter, the test sample machine meets standard requirements and can be used for carrying out a maximum explosion pressure test, a dynamic overpressure test and an internal ignition non-explosion propagation test, explosion pressure can be measured through the three pressure sensors, and the test sample machine is also provided with an internal combustion engine air inlet flame arrester and an internal combustion engine exhaust flame arrester which can check whether flame spreading can be prevented during the test. The anti-explosion tank body is also provided with a fourth pressure sensor for measuring the pressure in the anti-explosion tank body, and a gas analyzer is arranged at the gas outlet of the anti-explosion tank body, so that the pressure in the anti-explosion tank body and the concentration of the mixed gas can be detected, the test requirement can be met, and the test can be conveniently carried out. The air distribution system is used for reducing pressure and controlling flow of air and explosive gas through a first electromagnetic pressure reducing valve, a second electromagnetic pressure reducing valve, a first mass flow controller and a second mass flow controller, conveying the air and explosive gas to a mixing chamber for mixing, conveying the air and explosive gas to a test sample machine and an antiknock tank through a first pipeline, and controlling the air distribution system by the controller to realize automatic air distribution.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (6)
1. An explosion-proof performance testing device of an air inlet and outlet system of an explosion-proof internal combustion engine is characterized in that: the anti-explosion device comprises an anti-explosion tank body, an air distribution system and a controller, wherein one end of the anti-explosion tank body is provided with an opening, the air distribution system is arranged outside the anti-explosion tank body, the anti-explosion tank body is provided with a film for sealing the opening, a test sample machine is arranged in the anti-explosion tank body, the air distribution system is provided with a first pipeline, the first pipeline penetrates through the side wall of the anti-explosion tank body, is arranged in the anti-explosion tank body and is connected with the test sample machine, and the air distribution system is electrically connected with the controller;
the test prototype comprises a simulation cylinder, an internal combustion engine air intake flame arrester, a second pipeline and an internal combustion engine exhaust flame arrester, wherein the simulation cylinder comprises a combustion chamber, an air intake manifold and an exhaust manifold, the internal combustion engine air intake flame arrester is connected with the air intake manifold through a connecting pipeline, one end of the second pipeline is connected with the exhaust manifold, and the other end of the second pipeline is connected with the internal combustion engine exhaust flame arrester;
The combustion chamber is provided with an igniter, a first pressure sensor and a second pressure sensor, the first pressure sensor and the second pressure sensor are arranged on two sides of the igniter, and the distance between the first pressure sensor and the igniter is smaller than the distance between the second pressure sensor and the igniter; the first pressure sensor and the second pressure sensor are electrically connected with the controller; the test prototype further comprises a third pressure sensor;
When an air inlet end test of the internal combustion engine is carried out, a blind flange is used for sealing an air exhaust flame arrester of the internal combustion engine, the first pipeline is connected to one end, close to the air exhaust flame arrester of the internal combustion engine, of the second pipeline, an igniter and the first pressure sensor are arranged on a combustion chamber of the simulation cylinder and close to the air exhaust manifold, the second pressure sensor is arranged on the combustion chamber of the simulation cylinder and close to the air inlet manifold, and the third pressure sensor is arranged on the connecting pipeline;
When an internal combustion engine exhaust end test is carried out, a blind flange is used for sealing an internal combustion engine air inlet flame arrester, the first pipeline is connected with the connecting pipeline, the igniter and the first pressure sensor are arranged at the position, close to the air inlet manifold, of the combustion chamber of the simulation cylinder, the second pressure sensor is arranged at the position, close to the air outlet manifold, of the combustion chamber of the simulation cylinder, and the third pressure sensor is arranged at one end, close to the internal combustion engine exhaust flame arrester, of the second pipeline;
the gas distribution system comprises a gas detection channel and a mixed gas channel, the mixed gas channel is connected with the first pipeline, the mixed gas channel is provided with a gas mixing chamber, and a first safety flame arrester is connected between the gas mixing chamber and the first pipeline; the side wall of the antiknock tank body is provided with an exhaust port, the exhaust port is communicated with the gas detection channel, and the gas detection channel is connected with a second safety flame arrester.
2. The explosion-proof performance testing device for an air intake and exhaust system of an explosion-proof internal combustion engine according to claim 1, wherein: the opening part is equipped with annular end cover, the edge of annular end cover is equipped with the sealing washer, the one end of annular end cover with antiknock jar body articulates, the other end of annular end cover is equipped with the padlock, the padlock includes buckle and handle, antiknock jar body be equipped with the padlock cooperation locking the latch hook of end cover, the buckle lock joint in the latch hook and through the handle is taut, the annular end cover is equipped with and is used for the through-hole that the film passed.
3. The explosion-proof performance testing device for an air intake and exhaust system of an explosion-proof internal combustion engine according to claim 1, wherein: the ignition module is arranged outside the antiknock tank body and is electrically connected with the igniter and the controller.
4. The explosion-proof performance test device for an intake and exhaust system of an explosion-proof internal combustion engine according to claim 1 or 2, characterized in that: the side wall of the antiknock tank body is provided with a fourth pressure sensor, and the fourth pressure sensor is electrically connected with the controller.
5. The explosion-proof performance test device for an intake and exhaust system of an explosion-proof internal combustion engine according to claim 1 or 2, characterized in that: the gas distribution system further comprises an air channel and an explosion gas channel, the air channel and the explosion gas channel are connected with the mixed gas channel, the air channel is sequentially provided with a filter, a compressor, an air storage tank, a first electromagnetic pressure reducing valve, a first mass flow controller, a first electromagnetic valve and a first one-way valve from an air inlet to the mixed gas channel, the explosion gas channel comprises a gas cylinder, the explosion gas channel is sequentially provided with a first manual valve, a second electromagnetic pressure reducing valve, a second mass flow controller, a second electromagnetic valve and a second one-way valve from the gas cylinder to the mixed gas channel, the mixed gas channel is provided with a gas mixing chamber, the air channel and the explosion gas channel are connected with the gas mixing chamber, the mixed gas channel is sequentially provided with a third one-way valve, a first safety flame arrester and a second manual valve from the gas mixing chamber to the first pipeline, the gas detection channel is arranged outside the anti-explosion tank and is close to the opening, and the gas detection channel is sequentially connected with a third electromagnetic valve, a gas analyzer, a fourth one-way valve and a second safety flame arrester, and the first electromagnetic pressure reducing valve, the first electromagnetic pressure reducer, the second electromagnetic pressure reducer and the first electromagnetic pressure reducing valve and the second electromagnetic pressure reducing valve are sequentially connected with the first electromagnetic pressure reducing valve.
6. The explosion-proof performance testing device for an air intake and exhaust system of an explosion-proof internal combustion engine according to claim 1, wherein: the internal combustion engine air inlet flame arrester is connected with the connecting pipeline, the second pipeline is connected with the exhaust manifold, and the second pipeline is connected with the internal combustion engine exhaust flame arrester through flanges.
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