Safety performance test method for portable gas stove

Abstract

The invention provides a safety performance testing method for a portable gas stove. The safety performance testing method is used for carrying out safety performance testing on the portable gas stove provided with a first overpressure protection mechanism and a second overpressure protection mechanism. The method comprises the following steps: carrying out a pressurization test on the first overpressure protection mechanism to determine first pressure data; performing a pressurization test on the second overpressure protection mechanism to determine second pressure data; carrying out combustion test on the gas cylinder, and determining gas cylinder temperature data and third pressure data; wherein the gas cylinder temperature data correspond to the third pressure data; and determining a test result according to the first pressure data, the second pressure data, the gas cylinder temperature data and the third pressure data. The invention provides a set of systematic and standardized test scheme for carrying out safety performance test on the overpressure protection mechanism and the gas cylinder.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas appliance testing, in particular to a safety performance testing method of a portable gas stove. BACKGROUND

[0002] A portable gas stove, also known as a portable gas stove, is a portable gas stove that connects a disposable butane gas cylinder as fuel. It is simple in structure, usually composed of a stove body, a support and a gas cylinder interface, and can be used immediately without complex installation. Because it is small and portable, it is widely used in outdoor activities. The design of the portable gas stove pays attention to safety, and most of them are equipped with overpressure protection devices. When using, you only need to open the gas valve and ignite it. It has become a common tool for modern outdoor cooking, suitable for family picnics, camping, fishing and other scenes, and is also used for indoor temporary heating, which is a convenient alternative to traditional stoves.

[0003] However, the existing portable gas stove may not trigger the overpressure protection when the pressure of the small gas cylinder is too high, and there is a risk of gas leakage and explosion, so a systematic testing scheme is needed to evaluate its safety performance.

[0004] It should be noted that the information in the above BACKGROUND section is only used to strengthen the understanding of the background technology of the present application, and therefore can include technical information that is not known or easily inferred by those skilled in the art. SUMMARY

[0005] In view of the above problems, the present application is proposed to provide a safety performance testing method of a portable gas stove to overcome the above problems or at least partially solve the above problems.

[0006] The present application provides a safety performance testing method of a portable gas stove, which is used for safety performance testing of a portable gas stove provided with a first overpressure protection mechanism and a second overpressure protection mechanism. The method comprises: performing pressure testing on the first overpressure protection mechanism to determine first pressure data; performing pressure testing on the second overpressure protection mechanism to determine second pressure data; performing a combustion test on the gas cylinder to determine gas cylinder temperature data and third pressure data; wherein the gas cylinder temperature data and the third pressure data correspond to each other; determining a test result according to the first pressure data, the second pressure data, the gas cylinder temperature data and the third pressure data.

[0007] Further, the first overpressure protection mechanism is used to eject the gas cylinder when the pressure of the gas cylinder is greater than a preset first threshold value; the step of performing pressure testing on the first overpressure protection mechanism to determine the first pressure data comprises: Close the gas valve of the card-type furnace, and install a first gas cylinder correspondingly; wherein the first gas cylinder is an unpressurized air cylinder; Communicate the first gas cylinder with a supply source and a pressure detection component, and pressurize the first gas cylinder by the supply source at a first air inlet rate; When the first overpressure protection mechanism of the card-type furnace ejects the first gas cylinder, record first pressure data of the pressure detection component.

[0008] Further, the method further comprises: Depressurize the first gas cylinder to an unpressurized state by the supply source; Record first reset state data of the first overpressure protection mechanism; Update the test result according to the first reset state data.

[0009] Further, the second overpressure protection mechanism is used to eject the gas cylinder when the pressure of the gas cylinder is greater than a preset second threshold; the step of pressurizing the second overpressure protection mechanism to determine second pressure data comprises: Close the first overpressure protection mechanism; Adjust the gas valve of the card-type furnace to a minimum flow position, and install a second gas cylinder correspondingly; wherein the second gas cylinder is a pressurized air cylinder; Communicate the second gas cylinder with a supply source and a pressure detection component, and pressurize the second gas cylinder by the supply source at a second air inlet rate; When the second overpressure protection mechanism of the card-type furnace ejects the second gas cylinder, record second pressure data of the pressure detection component.

[0010] Further, the method further comprises: Depressurize the second gas cylinder to an unpressurized state by the supply source; Record second reset state data of the second overpressure protection mechanism; Update the test result according to the second reset state data.

[0011] Further, the method further comprises: Install a gas tightness leak detection component at a gas nozzle of the second gas cylinder; When pressurizing the second gas cylinder, record a gas leakage amount of the second overpressure protection mechanism by the gas tightness leak detection component; Update the test result according to the gas leakage amount.

[0012] Further, the step of performing a combustion test on the gas cylinder to determine cylinder temperature data and third pressure data comprises: Water bath preheating is performed on the gas cylinder; The gas valve of the cassette stove is closed, and the gas cylinder is installed correspondingly; The temperature detection assembly and the pressure detection assembly are installed on the gas cylinder; The gas valve of the cassette stove is opened, and the cylinder temperature data of the gas cylinder is recorded by the temperature detection assembly, and the third pressure data of the gas cylinder is recorded by the pressure detection assembly.

[0013] Further, the cylinder temperature data includes first sub-pressure data; the third pressure data includes first sub-pressure data; the step of opening the gas valve of the cassette stove and recording the cylinder temperature data of the gas cylinder by the temperature detection assembly and recording the third pressure data of the gas cylinder by the pressure detection assembly, comprising: A steel plate is installed on the rack of the cassette stove, and the gas valve of the cassette stove is opened to the maximum position for combustion; The first sub-temperature data of the gas cylinder is recorded by the temperature detection assembly, and the first sub-pressure data of the gas cylinder is recorded by the pressure detection assembly; wherein the first sub-temperature data and the first sub-pressure data correspond to each other; The gas valve of the cassette stove is closed; The second sub-temperature data of the gas cylinder is recorded by the temperature detection assembly, and the second sub-pressure data of the gas cylinder is recorded by the pressure detection assembly; wherein the second sub-temperature data and the second sub-pressure data correspond to each other.

[0014] Further, the method further comprises: Obtaining the combustion rated power of the gas cylinder; Measuring the initial weight of the gas cylinder and the empty bottle weight after complete combustion of the gas; According to the combustion rated power, the initial weight and the empty bottle weight, the target combustion time of 2 / 3 gas cylinder is determined.

[0015] Further, the step of closing the gas valve of the cassette stove comprises: When the target combustion time is continuously combusted, the gas valve of the cassette stove is closed.

[0016] The present application has the following advantages: In the embodiment of the present application, the existing card-type stove may not trigger the overpressure protection when the pressure of the small gas cylinder is too high, and there is a risk of gas leakage and explosion. The present application provides a solution for testing the safety performance of the card-type stove through pressure testing and combustion testing, specifically: the first overpressure protection mechanism is subjected to pressure testing to determine the first pressure data; the second overpressure protection mechanism is subjected to pressure testing to determine the second pressure data; the gas cylinder is subjected to combustion testing to determine the cylinder temperature data and the third pressure data; wherein the cylinder temperature data and the third pressure data correspond to each other; and the test results are determined according to the first pressure data, the second pressure data, the cylinder temperature data and the third pressure data. The present application provides a systematic and standardized testing scheme for testing the safety performance of the overpressure protection mechanism and the gas cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the description of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 is a step flow chart of a safety performance testing method of a card-type stove provided by an embodiment of the present application; Figure 2 is a card-type stove arrangement structure schematic diagram when pressure testing in an embodiment of the present application; Figure 3 is a thermocouple arrangement structure schematic diagram when combustion testing in an embodiment of the present application; Figure 4 is a connection structure schematic diagram of a small gas cylinder in an embodiment of the present application; Figure 5 is a first curve diagram of the temperature and pressure changing with time when the safety performance of the gas cylinder is qualified in an embodiment of the present application; Figure 6 is a second curve diagram of the temperature and pressure changing with time when the safety performance of the gas cylinder is qualified in an embodiment of the present application; Figure 7 is a first curve diagram of the temperature and pressure changing with time when the safety performance of the gas cylinder is unqualified in an embodiment of the present application; Figure 8 is a second curve diagram of the temperature and pressure changing with time when the safety performance of the gas cylinder is unqualified in an embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to make the objects, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below in combination with the drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] The inventor finds through analysis of the prior art that the existing card-type stove may fail to trigger overpressure protection when the pressure of a small gas cylinder is too high, and there is a risk of gas leakage and explosion, so a systematic test scheme is needed to evaluate the safety performance thereof.

[0021] With reference to Figure 1 , a safety performance test method of a card-type stove is shown, and the method is used for safety performance test of a card-type stove provided with a first overpressure protection mechanism and a second overpressure protection mechanism; The method comprises: S110, pressure test is performed on the first overpressure protection mechanism to determine first pressure data; S120, pressure test is performed on the second overpressure protection mechanism to determine second pressure data; S130, combustion test is performed on a gas cylinder to determine cylinder temperature data and third pressure data; wherein the cylinder temperature data and the third pressure data correspond to each other; S140, test results are determined according to the first pressure data, the second pressure data, the cylinder temperature data and the third pressure data.

[0022] In the embodiments of the present application, in view of the fact that the existing card-type stove may fail to trigger overpressure protection when the pressure of a small gas cylinder is too high, and there is a risk of gas leakage and explosion, the present application provides a solution for safety performance test of a card-type stove through pressure test and combustion test, specifically: pressure test is performed on the first overpressure protection mechanism to determine first pressure data; pressure test is performed on the second overpressure protection mechanism to determine second pressure data; combustion test is performed on a gas cylinder to determine cylinder temperature data and third pressure data; wherein the cylinder temperature data and the third pressure data correspond to each other; test results are determined according to the first pressure data, the second pressure data, the cylinder temperature data and the third pressure data. The present application provides a systematic and standardized test scheme for safety performance test of overpressure protection mechanisms and gas cylinders.

[0023] In the following, the safety performance test method of a card-type stove in the present exemplary embodiment will be further described.

[0024] As described in step S110, the first overpressure protection mechanism is subjected to a pressure test to determine first pressure data.

[0025] It should be noted that the first pressure data can be the pressure value applied to the first overpressure protection mechanism when the first overpressure protection mechanism is triggered. The overpressure protection mechanism can be subjected to pressure by using nitrogen or compressed air with a pressure of 1000 kPa as a supply source.

[0026] As described in step S120, the second overpressure protection mechanism is subjected to a pressure test to determine second pressure data.

[0027] It should be noted that the pressure threshold of the second overpressure protection mechanism can be greater than that of the first overpressure protection mechanism, and the second pressure data can be the pressure value applied to the second overpressure protection mechanism when the second overpressure protection mechanism is triggered.

[0028] As described in step S130, the gas cylinder is subjected to a combustion test to determine cylinder temperature data and third pressure data; wherein the cylinder temperature data and the third pressure data correspond to each other.

[0029] It should be noted that the gas cylinder can be a refillable cylinder with a combustible gas composition of ≥ 95% butane (isobutane); the cylinder temperature data can be the temperature of the body of the gas cylinder; and the third pressure data can be the pressure value in the gas cylinder.

[0030] As described in step S140, the test results are determined according to the first pressure data, the second pressure data, the cylinder temperature data, and the third pressure data.

[0031] It should be noted that the test results can also include other test data generated when the overpressure protection mechanism and the gas cylinder are tested.

[0032] In a specific implementation, the temperature of the test environment should be (20±5)℃, and the air flow rate should be less than 0.5 m / s.

[0033] In an embodiment of the present application, the first overpressure protection mechanism is used to eject the gas cylinder when the pressure of the gas cylinder is greater than a preset first threshold value; the specific process of step S110 "subjecting the first overpressure protection mechanism to a pressure test to determine first pressure data" can be further described in combination with the following description.

[0034] As described in the following steps, the gas valve of the cartridge furnace is closed, and a first gas cylinder is installed correspondingly; wherein the first gas cylinder is an unpressurized air cylinder; communicate the first gas cylinder with a supply source and a pressure detection component, and pressurize the first gas cylinder by the supply source at a first gas inlet rate; record first pressure data of the pressure detection component when the first overpressure protection mechanism of the cartridge stove ejects the first gas cylinder.

[0035] It should be noted that the first threshold value can be 450 kPa; and the first gas inlet rate can be 5 kPa / s~7 kPa / s. If the first pressure data is not in the pressure range of 450~550 kPa, the cartridge stove safety performance is unqualified.

[0036] In an embodiment of the present application, the method further comprises: depressurize the first gas cylinder to an unpressurized state by the supply source; record first reset state data of the first overpressure protection mechanism; update the test result according to the first reset state data.

[0037] It should be noted that if the first overpressure protection mechanism is not automatically reset, the cartridge stove safety performance is unqualified.

[0038] In a specific implementation, the first overpressure protection mechanism can be tested by the following steps: (a) Place the cartridge stove in a laboratory at ambient temperature.

[0039] (b) Set the cartridge stove gas valve to the closed position.

[0040] (c) Connect the supply source (air or nitrogen) to the customized first gas cylinder. Start from 0 kPa, pressurize the first gas cylinder at a rate of 5 kPa / s~7 kPa / s, until the first overpressure protection mechanism ejects the first gas cylinder.

[0041] (d) Record the first gas cylinder pressure at the time of ejection, i.e. the first pressure data.

[0042] (e) Ensure that the first gas cylinder has been completely disconnected, and verify whether the cartridge stove is automatically reset.

[0043] (f) Reduce the applied pressure to 0.

[0044] (g) Before closing the valve, turn the gas valve to the open position to release the pressure in the cartridge stove control device.

[0045] (h) If the first overpressure protection mechanism fails to work in the range of 450~550 kPa, or the first overpressure protection mechanism is automatically reset without manual intervention, stop the test.

[0046] (i) repeating steps (a) to (g) for each sample six consecutive times.

[0047] In an embodiment of the present application, the second overpressure protection mechanism is used to eject the gas cylinder when the pressure of the gas cylinder is greater than a preset second threshold value; the specific process of step S120 of "pressurizing the second overpressure protection mechanism to determine the second pressure data" can be further explained in combination with the following description.

[0048] Close the first overpressure protection mechanism as described in the following steps; Adjust the gas valve of the cartridge stove to the minimum flow position, and install a second gas cylinder correspondingly; wherein the second gas cylinder is a pressurized air cylinder; Connect the second gas cylinder with the gas supply source and the pressure detection assembly, and pressurize the second gas cylinder through the gas supply source at a second gas inlet rate; When the second overpressure protection mechanism of the cartridge stove ejects the second gas cylinder, record the second pressure data of the pressure detection assembly.

[0049] It should be noted that the second gas cylinder and the first gas cylinder can be the same gas cylinder, and the difference between the two is the pressurized state at the beginning of the test.

[0050] The second threshold value can be 550 kPa; the initial pressure value of the second gas cylinder can be 250 kPa; and the second gas inlet rate can be 5 kPa / s to 7 kPa / s; If the second pressure data is not in the pressure range of 550 to 650 kPa, or the second overpressure protection mechanism is automatically reset, the safety performance of the cartridge stove is unqualified.

[0051] In an embodiment of the present application, the method further comprises: Depressurize the second gas cylinder to an unpressurized state through the gas supply source; Record the second reset state data of the second overpressure protection mechanism; Update the test result according to the second reset state data.

[0052] It should be noted that if the second overpressure protection mechanism is not automatically reset, the safety performance of the cartridge stove is unqualified.

[0053] In an embodiment of the present application, the method further comprises: Install a gas-tight leak detection assembly at the gas nozzle of the second gas cylinder; When pressurizing the second gas cylinder, record the gas leakage amount of the second overpressure protection mechanism through the gas-tight leak detection assembly; update the test result according to the gas leakage amount.

[0054] It should be noted that if the gas leakage amount of the second overpressure protection mechanism is greater than 1.0 mL / min, the safety performance of the cartridge furnace is unqualified.

[0055] In a specific implementation, the second overpressure protection mechanism can be tested by the following steps: (a) Close the first overpressure protection mechanism of the pop-off cylinder.

[0056] (b) Adjust the cartridge furnace gas valve to the minimum flow (minimum fire) position.

[0057] (c) Supply the gas source (air or nitrogen) to apply pressure to the test cylinder. Start from 250 kPa, and pressurize the test cylinder at a rate of 5 kPa / s~7 kPa / s until the start pressure that triggers the action of the second overpressure protection mechanism is reached.

[0058] (d) Connect the gas-tight leak detection assembly, and confirm that the gas flow has been closed by measuring the leakage amount at the gas nozzle, or that the leakage amount of the independent secondary shutoff valve is not greater than 1.0 mL / min. (To facilitate the connection of the gas-tight leak detection assembly, the furnace head may need to be removed.) (e) When the second overpressure protection mechanism is activated, record the cylinder pressure.

[0059] (f) Gradually reduce the applied pressure to 0, while verifying that the second overpressure protection mechanism does not automatically reset.

[0060] (g) If the second overpressure protection mechanism fails to work in the range of 550~650 kPa, or the second overpressure protection mechanism automatically resets, stop the test.

[0061] (h) To restore the gas circuit of the cartridge furnace to work, the second overpressure protection mechanism needs to have a resettable function.

[0062] (i) For the cartridge furnace equipped with a resettable second overpressure protection mechanism, repeat steps (a) to (h) for six consecutive tests for each sample.

[0063] In an embodiment of the present application, the specific process of "carrying out a combustion test on the gas cylinder to determine the cylinder temperature data and the third pressure data" in step S130 can be further described in combination with the following description.

[0064] Carry out water bath preheating on the gas cylinder as described in the following steps: Close the gas valve of the cartridge furnace, and install the gas cylinder correspondingly; Install a temperature detection assembly and a pressure detection assembly on the gas cylinder; Open the gas valve of the cartridge stove, and record the cylinder temperature data of the gas cylinder through the temperature detection component, and record the third pressure data of the gas cylinder through the pressure detection component.

[0065] It should be noted that the temperature of the water bath preheating of the gas cylinder can be 40±1℃, so as to ensure the uniformity and consistency of the test conditions, and the water bath preheating can ensure the uniformity and consistency of the temperature of the bottle body and the bottle.

[0066] In an embodiment of the present application, the cylinder temperature data includes first sub-pressure data; the third pressure data includes first sub-pressure data; and the specific process of "opening the gas valve of the cartridge stove, and recording the cylinder temperature data of the gas cylinder through the temperature detection component, and recording the third pressure data of the gas cylinder through the pressure detection component" can be further explained in combination with the following description.

[0067] As described in the following steps, install a steel plate on the furnace frame of the cartridge stove, and open the gas valve of the cartridge stove to the maximum position for combustion; Record the first sub-temperature data of the gas cylinder through the temperature detection component, and record the first sub-pressure data of the gas cylinder through the pressure detection component; wherein the first sub-temperature data and the first sub-pressure data correspond to each other; Close the gas valve of the cartridge stove; Record the second sub-temperature data of the gas cylinder through the temperature detection component, and record the second sub-pressure data of the gas cylinder through the pressure detection component; wherein the second sub-temperature data and the second sub-pressure data correspond to each other.

[0068] It should be noted that the steel plate can be used to simulate the pot heated by the cartridge stove. The first sub-temperature data and the first sub-pressure data are used to reflect the temperature and pressure changes with time when the gas valve of the cartridge stove is opened to the maximum position; and the second sub-temperature data and the second sub-pressure data are used to reflect the temperature and pressure changes with time when the gas valve of the cartridge stove is closed.

[0069] In an embodiment of the present application, the method further comprises: Obtaining the combustion rated power of the gas cylinder; Measuring the initial weight of the gas cylinder and the empty bottle weight after complete combustion of the gas; Determining the target combustion duration of 2 / 3 gas cylinder consumption according to the combustion rated power, the initial weight and the empty bottle weight.

[0070] It should be noted that the target combustion duration can be calculated by the following formula: Target burning time h = (initial weight g - empty bottle weight g) / (burning rated power kW * 71.4 g / h) * 2 / 3 Wherein, the time length of burning the gas bottle to consume 2 / 3 of the gas bottle is taken as the target burning time, and the test conditions of different gas bottles can be unified.

[0071] In an embodiment of the present application, the specific process of "turning off the gas valve of the card-type stove" can be further described in combination with the following description.

[0072] As described in the following steps, when the target burning time is continuously burned, the gas valve of the card-type stove is turned off.

[0073] In a specific implementation, the gas bottle of the card-type stove can be subjected to a burning test by the following steps: (a) The standby gas bottle pre-processed by the water bath is loaded into the card-type stove within 5 minutes, and the test is started.

[0074] (b) Ignite the burner, adjust the valve to the maximum fire position, and start the stopwatch.

[0075] (c) Continuously record the changes of the gas bottle surface temperature and the pressure in the bottle with time.

[0076] (d) The running time of the measured sample is calculated according to the time in step (b) above or one hour (the smaller value is taken), and then the valve is closed. Record the time.

[0077] (e) Within 3 minutes after the valve is closed, carefully remove the test steel plate, and replace the standby gas bottle with a pre-processed customized test gas bottle (preheated to 40°C±1°C, the gas bottle surface is installed with a thermocouple temperature probe, and the appropriate gas bottle pressure tooling). Place the test steel plate in the same position, and record the time.

[0078] (f) After installing the test steel plate, continue to observe for 5 minutes, and continue to record the gas bottle pressure and surface temperature.

[0079] (g) If the pressure in the gas bottle or the temperature of the gas bottle surface continues to rise, continue to wait for 5 minutes, and refer to the conditions specified in step (a).

[0080] (h) Continue to run the product according to step (f).

[0081] (i) Leave the test steel plate in place, turn off the burner, and continue to record the surface temperature and pressure until the maximum reading is reached.

[0082] In a specific implementation, when the following conditions are met, the test steel plate should be removed and the burning test should be stopped: 1) The temperature of any point on the surface of the gas bottle exceeds 70°C; 2) the pressure in the cylinder exceeds 450 kPa; 3) any overpressure protection mechanism is activated.

[0083] In one implementation, the test environment or apparatus shall meet the following requirements: (a) The cartridge furnace is in a normal atmospheric ambient temperature test room when the pressure test is performed.

[0084] (b) Air or nitrogen is used as the supply gas source with a pressure regulator rate adjustment between 5 kPa / s and 7 kPa / s.

[0085] (c) The custom test cylinders (i.e. the first and second cylinders) shall have a connection fitting for connection to the supply gas source to supply high pressure air / nitrogen.

[0086] (d) The pressure detection assembly can be a calibrated pressure gauge / sensor with a range of 0 to 1000 kPa and an accuracy of ±5 kPa.

[0087] (e) A flexible air hose is used to connect the supply gas (air / nitrogen) regulator to the pressure gauge and the cylinders.

[0088] (f) A stopwatch with an accuracy of ±0.2 s.

[0089] (g) The leak tightness detection assembly has a measurement unit of 1 mL / min with an accuracy of ±0.3 mL / min.

[0090] (h) After the pressure test is completed, the cartridge furnace and test cylinders are placed in a test room with a temperature that can be maintained at 35 ± 2 °C and the entire cylinder is immersed in a water bath at 40 °C ± 1 °C with a size sufficient to fill more than 95% of the isobutane gas concentration in preparation for the burn test.

[0091] (i) Prepare two standard stainless steel test plates as follows: 375 mm x 310 mm x 6 mm stainless steel test plate for single burner cartridge furnace testing; 680 mm x 320 mm x 6 mm stainless steel test plate for double burner cartridge furnace testing.

[0092] The size of the test steel plate shall ensure that it covers the entire cartridge furnace. If the stainless steel test plate does not cover the entire cartridge furnace, a 6 mm thick stainless steel test plate shall be cut so that it protrudes at least 10 mm beyond the outer edge of the cartridge furnace in each direction, allowing the steel plate to be reinforced to prevent deformation.

[0093] (j) A K-type thermocouple wire with sufficient length and a temperature patrol instrument.

[0094] It should be noted that before starting the test, it is necessary to ensure that there is enough space around the test, and there is no other flammable and explosive articles, to ensure that the risk of fire or explosion caused by the test process is controlled.

[0095] In a specific implementation, the supply gas source includes a gas source tank; when the pressure test is performed, the cartridge furnace can be arranged in the following manner: Referring to Figure 2 The small gas cylinder (i.e. the first gas cylinder and the second gas cylinder) is installed in the cartridge furnace, and the small gas cylinder is in communication with the sample valve of the cartridge furnace. The small gas cylinder is connected to the gas source tank through a hose, and the hose can be provided with various valve bodies to control the supply gas flow.

[0096] It should be noted that, since the first overpressure protection mechanism and the second overpressure protection mechanism are arranged in the cartridge furnace, Figure 2 The overpressure protection valve in the cartridge furnace is used for overpressure protection of the supply gas flow, rather than overpressure protection of the cartridge furnace.

[0097] In a specific implementation, the gas cylinder includes a small gas cylinder; the temperature detection assembly includes a thermocouple; when the combustion test is performed, the thermocouple of the small gas cylinder can be arranged in the following manner: Referring to Figure 3 The surface of the bottle body of the small gas cylinder is provided with three thermocouples; the first thermocouple is arranged at a distance of 25 mm from the mouth, the second thermocouple is arranged at a distance of 25 mm from the bottom, and the third thermocouple is arranged at the midpoint of the line connecting the first thermocouple and the second thermocouple; the above-mentioned thermocouples are arranged along the axial direction of the small gas cylinder and on one side of the opening of the gas cylinder cover plate of the cartridge furnace.

[0098] In a specific implementation, the pressure detection assembly includes a pressure gauge; referring to Figure 4 A corresponding connection hole can be opened on the small gas cylinder used for testing, and the pressure gauge and the customized replacement gas cylinder are connected through the pressure measuring tee pipe; then the replacement gas cylinder is installed at the position of the cartridge furnace installation gas cylinder.

[0099] It should be noted that the above arrangement structure is suitable for the scene where the gas cylinder cannot be directly installed in the cartridge furnace, and the above arrangement structure can detect the real pressure inside the gas cylinder and the real pressure applied by the gas cylinder to the overpressure protection mechanism, and the data is more referential.

[0100] In a specific implementation, the pressure test and the combustion test can be performed in the following manner: First, the pressure test is performed, and after the first overpressure protection mechanism and the second overpressure protection mechanism pass the test, the gas cylinder is subjected to pre-treatment (test environment temperature control and water bath temperature control) for the combustion test; After the temperature pre-treatment is completed, the temperature points of the test sample / gas cylinder are arranged and the pressure measurement is built; After all the test preparations are completed, open the gas cylinder pressure and temperature rise test.

[0101] It should be noted that the test conditions can be stabilized by controlling the temperature of the test environment and the water bath, without the need for on-site testing in a gas laboratory, and the reproducibility of the test results is ensured.

[0102] In a specific implementation, the test results can include the following: 1) Test gas cylinder detailed information for test use; 2) The way to disable the overpressure protection mechanism; 3) The starting pressure of each test; 4) Whether the first overpressure protection mechanism and the second overpressure protection mechanism will automatically reset the ejected gas cylinder or restore the gas path after operation; 5) The gas leakage amount of the second overpressure protection mechanism; 6) Whether the test is stopped due to test failure; 7) The curve of the surface temperature and internal pressure of the gas cylinder changing with time; 8) The maximum cylinder pressure, maximum surface temperature and position of the gas cylinder, and the conditions under which these conditions are observed.

[0103] In a specific implementation, when the test results meet the following conditions, the safety performance of the gas cylinder and the portable stove is qualified: 1) The surface temperature of the gas cylinder does not exceed 70℃; 2) When the pressure does not exceed 450 kPa, any overpressure protection mechanism is not activated; 3) The first overpressure protection mechanism ejects the gas cylinder and cuts off the gas supply at a pressure of 450~550 kPa; 4) The second overpressure protection mechanism ejects the gas cylinder at a pressure of 550~650 kPa, and the leakage amount is less than 1mL / min.

[0104] As an example, refer to Figures 5-6 Since the surface temperature of the gas cylinder does not exceed 70℃, the pressure of the gas cylinder is less than 450kPa and the overpressure protection mechanism is not triggered, the safety performance of the gas cylinder is qualified.

[0105] As an example, refer to Figures 7-8 Since the surface temperature of the gas cylinder exceeds 70℃ (the test is stopped when it reaches 70℃), the safety performance of the gas cylinder is unqualified.

[0106] Although preferred embodiments of the application have been described in detail, those skilled in the art will appreciate that various modifications and alterations can be made to the embodiments without departing from the scope of the application. Accordingly, the appended claims are intended to encompass all such modifications and alterations as falling within the scope of the application.

[0107] Finally, it should be noted that, in the description of the application, relational terms such as first and second, and the like, can be used solely to distinguish one entity or action from another entity or action without necessarily implying any actual relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a... " does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0108] The above describes in detail the safety performance test method of the card-type stove provided by the application, and the principles and implementation manners of the application are described by using specific examples; the above description of the embodiments is only used to help understand the method of the application and its core idea; meanwhile, for those skilled in the art, according to the idea of the application, the specific implementation manners and application scope can be changed; in conclusion, the content of the specification should not be understood as a limitation of the application.

Claims

1. A method for testing the safety performance of a portable gas stove, characterized in that, The method is used to test the safety performance of a cassette furnace equipped with a first overpressure protection mechanism and a second overpressure protection mechanism. The method includes: A pressure test is performed on the first overpressure protection mechanism to determine the first pressure data; A pressure test was performed on the second overpressure protection mechanism to determine the second pressure data; A combustion test is performed on the gas cylinder to determine the cylinder temperature data and the third pressure data; wherein the cylinder temperature data and the third pressure data correspond to each other; The test results are determined based on the first pressure data, the second pressure data, the cylinder temperature data, and the third pressure data.

2. The method according to claim 1, characterized in that, The first overpressure protection mechanism is used to eject the gas cylinder when the cylinder pressure exceeds a preset first threshold; the step of performing a pressure test on the first overpressure protection mechanism to determine the first pressure data includes: Close the gas valve of the portable gas stove and install the first gas cylinder accordingly; wherein, the first gas cylinder is an unpressurized air cylinder; The first gas cylinder is connected to a gas supply source and a pressure detection component, and the first gas cylinder is pressurized by the gas supply source at a first intake rate. When the first overpressure protection mechanism of the portable gas stove ejects the first gas cylinder, the first pressure data of the pressure detection component is recorded.

3. The method according to claim 2, characterized in that, The method further includes: The first gas cylinder is depressurized to an unpressurized state by the gas supply source; Record the first reset state data of the first overpressure protection mechanism; The test results are updated based on the first reset state data.

4. The method according to claim 1, characterized in that, The second overpressure protection mechanism is used to eject the gas cylinder when the cylinder pressure exceeds a preset second threshold; the step of performing a pressure test on the second overpressure protection mechanism to determine the second pressure data includes: Close the first overpressure protection mechanism; Adjust the gas valve of the portable gas stove to the minimum flow position and install the second gas cylinder accordingly; wherein, the second gas cylinder is a pressurized air cylinder; The second gas cylinder is connected to a gas supply source and a pressure detection component, and the second gas cylinder is pressurized by the gas supply source at a second intake rate; When the second overpressure protection mechanism of the cassette stove ejects the second gas cylinder, the second pressure data of the pressure detection component is recorded.

5. The method according to claim 4, characterized in that, The method further includes: The second gas cylinder is depressurized to an unpressurized state by the gas supply source. Record the second reset state data of the second overpressure protection mechanism; The test results are updated based on the second reset state data.

6. The method according to claim 4, characterized in that, The method further includes: Install a leak detection assembly at the gas nozzle of the second gas cylinder; When the second gas cylinder is pressurized, the amount of gas leakage from the second overpressure protection mechanism is recorded by the airtightness leak detection component. The test results are updated based on the amount of gas leakage.

7. The method according to claim 1, characterized in that, The steps of conducting a combustion test on the gas cylinder to determine the cylinder temperature data and the third pressure data include: Preheat the gas cylinders in a water bath; Close the gas valve of the portable gas stove and install the gas cylinder accordingly; A temperature detection component and a pressure detection component are installed on the gas cylinder; The gas valve of the portable gas stove is opened, and the gas cylinder temperature data is recorded by the temperature detection component, and the third pressure data of the gas cylinder is recorded by the pressure detection component.

8. The method according to claim 7, characterized in that, The gas cylinder temperature data includes first sub-pressure data; the third pressure data includes the first sub-pressure data; the step of opening the gas valve of the portable gas stove, recording the gas cylinder temperature data through the temperature detection component, and recording the third pressure data of the gas cylinder through the pressure detection component includes: A steel plate is installed on the furnace frame of the portable gas stove, and the gas valve of the portable gas stove is opened to the maximum position for combustion; The temperature detection component records the first sub-temperature data of the gas cylinder, and the pressure detection component records the first sub-pressure data of the gas cylinder; wherein the first sub-temperature data and the first sub-pressure data correspond to each other; Turn off the gas valve of the portable gas stove; The second sub-temperature data of the gas cylinder is recorded by the temperature detection component, and the second sub-pressure data of the gas cylinder is recorded by the pressure detection component; wherein the second sub-temperature data and the second sub-pressure data correspond to each other.

9. The method according to claim 8, characterized in that, The method further includes: Obtain the rated combustion power of the gas cylinder; Measure the initial weight of the gas cylinder and the weight of the empty cylinder after the gas has been completely burned; The target combustion time for consuming 2 / 3 of the gas cylinder is determined based on the rated combustion power, the initial weight, and the weight of the empty cylinder.

10. The method according to claim 9, characterized in that, The step of shutting off the gas valve of the portable gas stove includes: When the target burning time has been reached, the gas valve of the portable gas stove is closed.

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