Electronic product fire-resistant combustion test device and test method

Abstract

The invention relates to the technical field of electronic product performance testing, and provides an electronic product fire-resistant combustion test device and test method.The test device comprises a combustion implementation box, a flaming device and a sample fixing device; the fire spraying device comprises a first fire spraying pipe, a first igniter, a fuel gas butt joint pipe, a second fire spraying pipe, a second igniter, a third fire spraying pipe and a third igniter, the first igniter is used for igniting fuel gas of the first fire spraying pipe, the first fire spraying pipe can move between a first position and a second position, and the second fire spraying pipe comprises a first annular pipe; the first ring pipe comprises a first ring pipe, a plurality of first flame nozzles are arranged on the first ring pipe, the third flame pipe comprises a second ring pipe, the first ring pipe and the second ring pipe jointly surround the sample fixing device, a plurality of second flame nozzles are arranged on the second ring pipe, and the second igniter is used for igniting gas of the second flame pipe. According to the electronic product fire-resistant combustion test device, the diversity of flame jetting during the fire-resistant combustion test of the electronic product is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic product performance testing, and more specifically, to a fire resistant combustion testing device and a testing method for electronic products. Background Art

[0002] In the prior art, fire resistance combustion tests are often carried out in the testing of electronic products such as lighting, low-voltage electrical appliances, household appliances, machine tool appliances, electric machines, power tools, electronic instruments, electrical meters, electrical connectors, and accessories. This is because electronic products may encounter various extreme conditions during use, such as short circuits, overloads, etc., which may cause fires. Fire resistance combustion tests simulate these extreme conditions to evaluate the fire resistance of electronic products. Specifically, the fire hazard of small flames caused by fault conditions of the equipment can be assessed based on whether the electronic product ignites and how long it lasts.

[0003] However, the electronic product fire resistance test device in the prior art only uses one flamethrower to spray fire on the electronic product, and the flame spraying point and direction are single, which cannot simulate the influence of more complex flame conditions on the fire resistance and combustion performance of the electronic product. Summary of the invention

[0004] In view of this, the present application provides an electronic product fire resistant combustion test device to solve the technical problem of single ignition point and single ignition direction in the electronic product fire resistant combustion test device in the prior art.

[0005] The present application provides an electronic product fire resistant combustion test device, wherein the electronic product fire resistant combustion test device comprises a combustion implementation box, a flame spraying device and a sample fixing device; The sample fixing device is arranged in the combustion implementation box; The flame spraying device includes a first flame spraying tube, a first igniter, a gas butt joint tube located above the first flame spraying tube, a second flame spraying tube, a second igniter, a third flame spraying tube and a third igniter. The first flame spraying tube is movably arranged on the bottom plate of the combustion implementation box. The first igniter is used to ignite the gas of the first flame spraying tube so that the pipe mouth of the first flame spraying tube can spray fire toward the electronic product fixed by the sample fixing device. The first flame spraying tube can move between a first position and a second position. In the first position, the pipe mouth of the first flame spraying tube is separated from the lower end of the gas butt joint tube. In the second position, the pipe mouth of the first flame spraying tube is butt jointed with the lower end of the gas butt joint tube. The second flame spraying tube can be connected to the upper end of the gas butt joint tube. The mouth is connected or isolated, the third flame-spraying pipe can be connected or isolated with the upper port of the gas butt-joint pipe, the second flame-spraying pipe includes a first annular pipe located on one side of the sample fixing device, and a plurality of first flame-spraying nozzles are arranged on the first annular pipe, the third flame-spraying pipe includes a second annular pipe located on the other side of the sample fixing device, the first annular pipe and the second annular pipe together surround the sample fixing device, and a plurality of second flame-spraying nozzles are arranged on the second annular pipe, the second igniter is used to ignite the gas of the second flame-spraying pipe so that the first flame-spraying nozzle can spray fire toward the electronic product fixed by the sample fixing device, and the third igniter is used to ignite the gas of the third flame-spraying pipe so that the second flame-spraying nozzle can spray fire toward the electronic product fixed by the sample fixing device.

[0006] Furthermore, the flame-spraying device includes a rotating seat rotatably arranged on the bottom plate of the combustion implementation box, a gas mixing chamber is arranged in the rotating seat, the first flame-spraying pipe is connected to the rotating seat and communicated with the gas mixing chamber, the pipe mouth of the first flame-spraying pipe is away from the rotating seat, the rotating seat is also connected to a gas connecting pipe, the gas connecting pipe is communicated with the gas mixing chamber, and when the rotating seat rotates, the first flame-spraying pipe is driven to rotate between a first position and a second position.

[0007] Furthermore, the first igniter is an electronic igniter arranged on the rotating seat or on the outside of the first flame spraying tube, and the first igniter has a first arc wire extending into the first flame spraying tube adjacent to the tube mouth of the first flame spraying tube.

[0008] Further, the gas butt joint tube is arranged in a vertical direction, and the flame-spraying device includes a sealing sleeve slidably sleeved on the outer side of the gas butt joint tube, and when the pipe mouth of the first flame-spraying pipe is butt jointed with the lower end port of the gas butt joint tube, the sealing sleeve can slide to a position to seal and surround the gap between the pipe mouth of the first flame-spraying pipe and the lower end port of the gas butt joint tube.

[0009] Further, the flame spraying device includes a fixing seat connected to the upper end of the gas butt joint pipe, the fixing seat is provided with a first chamber, a second chamber and a third chamber, the second chamber and the third chamber are respectively communicated with the first chamber, the first chamber is communicated with the upper end of the gas butt joint pipe, the second flame spraying pipe includes a first transverse pipe penetrating the fixing seat, one end of the first annular pipe is connected to the first transverse pipe and is communicated with the inside of the first transverse pipe, the axis of the first transverse pipe is arranged in the horizontal direction, the first transverse pipe can move along its axis and can rotate around its axis, and the first transverse pipe can be communicated with or isolated from the second chamber when moving along its axis, and the third flame spraying pipe includes a second transverse pipe penetrating the fixing seat, one end of the second annular pipe is connected to the second transverse pipe and is communicated with the inside of the second transverse pipe, the axis of the second transverse pipe is arranged in the horizontal direction, the second transverse pipe can move along its axis and can rotate around its axis, and the second transverse pipe can be communicated with or isolated from the third chamber when moving along its axis.

[0010] Furthermore, the first transverse tube has a first partition, the first partition divides the first transverse tube into a first fire-conducting chamber and a first flame-retardant chamber, one end of the first annular tube is in communication with the first fire-conducting chamber, the first transverse tube has a first air guide hole on the side wall corresponding to the first fire-conducting chamber, when the first transverse tube moves along its axis to make the first fire-conducting chamber in the second chamber, the first fire-conducting chamber is in communication with the second chamber through the first air guide hole, and when the first transverse tube moves along its axis to make the outer wall of the first flame-retardant chamber cross the second chamber, the first fire-conducting chamber and the second chamber are in communication. Isolation; the second transverse tube is provided with a second partition, the second partition divides the second transverse tube into a second fire guide chamber and a second flame retardant chamber, one end of the second annular tube is communicated with the second fire guide chamber, the second transverse tube has a second air guide hole on the side wall corresponding to the second fire guide chamber, when the second transverse tube moves along its axis so that the second fire guide chamber is in the third chamber, the second fire guide chamber is communicated with the third chamber through the second air guide hole, when the second transverse tube moves along its axis so that the outer wall of the second flame retardant chamber crosses the third chamber, the second fire guide chamber is isolated from the third chamber.

[0011] Furthermore, the second igniter is an electronic igniter arranged in the first flame retardant cavity, and the second igniter has a second arc wire extending through the first partition into the first ignition chamber; the third igniter is an electronic igniter arranged in the second flame retardant cavity, and the third igniter has a third arc wire extending through the second partition into the second ignition chamber.

[0012] Further, the first transverse tube and the second transverse tube each extend out of the combustion implementation box, and a first transverse tube locking mechanism and a second transverse tube locking mechanism are provided on the outer side of the combustion implementation box, the first transverse tube locking mechanism is used to lock and fix the first transverse tube or unlock the first transverse tube so that the first transverse tube can move along its axis and rotate around its axis, the second transverse tube locking mechanism is used to lock and fix the second transverse tube or unlock the second transverse tube so that the second transverse tube can move along its axis and rotate around its axis, the rotating seat is connected with a rotating operating rod, the rotating operating rod extends out of the combustion implementation box, the axis of the rotating operating rod is parallel to the rotation axis of the rotating seat, and a rotating locking mechanism is provided on the outer side of the combustion implementation box, the part of the rotating operating rod extending out of the combustion implementation box cooperates with the rotating locking mechanism, and the rotating locking mechanism is used to lock and fix the rotating operating rod or unlock the rotating operating rod.

[0013] Furthermore, the sealing sleeve is connected to an adjusting rod, the adjusting rod extends out of the combustion implementation box, an adjusting rod support and locking structure is provided on the outer side of the combustion implementation box, and the adjusting rod can be vertically moved and lockably mounted on the adjusting rod support and locking structure.

[0014] In addition, the present invention also provides an electronic product fire resistant combustion test method, wherein the electronic product fire resistant combustion test method is implemented using the above-mentioned electronic product fire resistant combustion test device, and the electronic product fire resistant combustion test method includes performing an electronic product fire resistant combustion test through a first flame spraying mode, performing an electronic product fire resistant combustion test through a second flame spraying mode, and performing an electronic product fire resistant combustion test through a third flame spraying mode; The electronic product fire resistance combustion test performed by the first flame spraying mode includes: R1. Put the electronic product to be tested in the combustion implementation box and fix it on the sample fixing device. By rotating the rotating seat, separate the pipe mouth of the first flame spraying pipe from the lower end of the gas butt pipe, and tilt the first flame spraying pipe so that the pipe mouth of the first flame spraying pipe faces the electronic product fixed by the sample fixing device, and then keep the rotating seat in position; R2, introducing gas into the gas pipe, starting the first igniter to ignite so that the nozzle of the first flame spraying pipe sprays fire toward the electronic product fixed by the sample fixing device; R3, observe and record the time required for the electronic product to be ignited and the burning duration of the electronic product after the nozzle of the first flame-spraying tube continues to spray fire for a predetermined time and then extinguishes; R4, take out the tested electronic product, put in a new electronic product to be tested and fix it on the sample fixing device, adjust the angle of the rotating seat and keep it at the angle, and then repeat steps R2 and R3; The electronic product fire resistance combustion test performed by the second flame spraying mode includes: S1. Put the electronic product to be tested in the combustion implementation box and fix it on the sample fixing device, rotate the rotating seat to make the pipe mouth of the first flame spray pipe dock with the lower end of the gas butt joint pipe, move the sealing sleeve so that the sealing sleeve surrounds the gap between the pipe mouth of the first flame spray pipe and the lower end of the gas butt joint pipe, move the first transverse pipe along its axis to communicate with the second chamber, and move the second transverse pipe along its axis to isolate it from the third chamber; S2, introducing gas into the gas pipe, starting the second igniter to ignite so that the plurality of first flame spray nozzles spray fire toward the electronic product fixed by the sample fixing device; S3, observing and recording the time required for the electronic product to be ignited and the burning duration of the electronic product after the first flame nozzle continues to spray fire for a predetermined time and is extinguished; S4, taking out the tested electronic product, re-inserting a new electronic product to be tested and fixing it on the sample fixing device, rotating the first transverse tube around its axis, changing the angle of the first transverse tube and keeping the first transverse tube at the angle, and then repeating steps S2 and S3; The fire resistance combustion test of electronic products by the third flame spraying mode includes: T1. Put the electronic product to be tested in the combustion implementation box and fix it on the sample fixing device, rotate the rotating seat to make the pipe mouth of the first flame spray pipe dock with the lower end of the gas butt joint pipe, move the sealing sleeve to make the sealing sleeve surround the gap between the pipe mouth of the first flame spray pipe and the lower end of the gas butt joint pipe, move the first transverse pipe along its axis to communicate with the second chamber, and move the second transverse pipe along its axis to communicate with the third chamber; T2, introducing gas into the gas pipe, starting the second igniter and the third igniter to ignite so that the plurality of first flame spray nozzles and the plurality of second flame spray nozzles spray fire toward the electronic product fixed by the sample fixing device; T3, observing and recording the time required for the electronic product to be ignited, and observing and recording the burning duration of the electronic product after the first flame spray nozzle and the second flame spray nozzle continue to spray fire for a predetermined time and then extinguish; T4, take out the tested electronic product, put a new electronic product to be tested back in and fix it on the sample fixing device, rotate the first transverse tube around its axis and the second transverse tube around its axis, change the angle of the first transverse tube and keep it at the angle and change the angle of the second transverse tube and keep it at the angle, then repeat steps T2 and T3.

[0015] The beneficial effects of the electronic product fire resistant combustion test device provided by the present invention are: Compared with the prior art, since the electronic product fire resistant combustion test device provided by the present invention is provided with a first flame spraying tube, a second flame spraying tube and a third flame spraying tube, the first flame spraying tube can be placed in a first position as required, and then the first igniter ignites the gas of the first flame spraying tube so that the tube mouth of the first flame spraying tube sprays fire toward the electronic product fixed by the sample fixing device, or the first flame spraying tube is placed in a second position, the tube mouth of the first flame spraying tube is butted with the lower end of the gas butt joint tube, at which time the first flame spraying tube does not spray fire but also serves as a gas conduit, and then the second flame spraying tube is selected as required to be connected or isolated with the upper end of the gas butt joint tube, and the third flame spraying tube is selected as required to be connected or isolated with the upper end of the gas butt joint tube. The electronic product fixed by the sample fixing device is connected or isolated, so that the first ring tube and the second ring tube can work on one side of the electronic product fixed by the sample fixing device so that multiple first flame nozzles or multiple second flame nozzles can spray fire on the electronic product, and the first ring tube and the second ring tube can work together to realize the surrounding flame spraying of multiple first flame nozzles and multiple second flame nozzles on the electronic product fixed by the sample fixing device, so as to selectively realize the flame spraying of the electronic product fixed by the sample fixing device at multiple flame spraying points and directions, thereby improving the diversity of flame spraying during the fire resistance combustion test of the electronic product. No matter the flame spraying is through the first flame spraying tube or the second flame spraying tube or the third flame spraying tube, it is only necessary to set a gas supply path leading to the first flame spraying tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A three-dimensional schematic diagram of an electronic product fire resistance combustion test device according to an embodiment of the present application; Figure 2 for Figure 1 The enlarged view of point A in the middle; Figure 3A three-dimensional schematic diagram of another viewing angle of the electronic product fire resistance combustion test device according to an embodiment of the present application; Figure 4 for Figure 3 The enlarged view of point A in the middle; Figure 5 for Figure 3 The enlarged view of point B in the middle; Figure 6 A partial cross-sectional view of the connection between the fixing seat and the gas butt pipe in the electronic product fire resistance combustion test device according to one embodiment of the present application; Figure 7 This is a schematic diagram of the cooperation between the first transverse tube and the fixing seat in the electronic product fire resistance combustion test device according to one embodiment of the present application, wherein the first fire-conducting chamber is connected to the second chamber; Figure 8 It is a schematic diagram of the cooperation between the first transverse tube and the fixing seat in the electronic product fire resistance combustion test device according to one embodiment of the present application, wherein the first fire-guiding chamber is isolated from the second chamber; Fig. 9 It is a three-dimensional schematic diagram of some components of an electronic product fire resistance combustion test device according to an embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. The drawings exemplarily provide one or at least three embodiments of the present application to make the understanding of the technical solution disclosed in the present application more accurate and thorough. However, it should be understood that the present application can be implemented in a variety of different forms and is not limited to the embodiments described below.

[0019] The same or similar numbers in the drawings of the present application correspond to the same or similar parts; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0020] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B.

[0021] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0022] See also Figure 1 , Figure 2 and Fig. 9 The present invention provides a fire resistant combustion test device for electronic products, wherein the fire resistant combustion test device for electronic products comprises a combustion implementation box 100, a flame spraying device and a sample fixing device 200, and the sample fixing device 200 is used to fix electronic products such as lighting, low-voltage electrical appliances, household appliances, machine tool electrical appliances, electric machines, electric tools, electronic instruments, electrical meters, electrical connectors, accessories, etc.; The sample fixing device 200 is arranged in the combustion implementation box 100. The front of the combustion implementation box 100 may be provided with an openable and closable door 101 having a transparent material plate (such as a fireproof acrylic plate, etc.), so as to facilitate observation of the combustion test condition of the combustion implementation box 100 after closing the combustion implementation box 100. The flame spraying device comprises a first flame spraying tube 1, a first igniter 2, a gas butt joint tube 3 located above the first flame spraying tube 1, a second flame spraying tube, a second igniter 12, a third flame spraying tube and a third igniter. The first flame spraying tube 1 is movably arranged on the bottom plate of the combustion implementation box 100. The first igniter 2 is used to ignite the gas of the first flame spraying tube 1 so that the nozzle 11 of the first flame spraying tube 1 can spray fire toward the electronic product fixed by the sample fixing device 200. The first flame spraying tube 1 can move between a first position and a second position. In the first position, the nozzle 11 of the first flame spraying tube 1 is separated from the lower end of the gas butt joint tube 3. In the second position, the nozzle 11 of the first flame spraying tube 1 is butt jointed with the lower end of the gas butt joint tube 3. At this time, the first flame spraying tube 1 does not spray fire but also serves as a gas conduit. The second flame spraying tube can be connected to the gas butt joint tube 3. The upper end of the gas-to-gas pipe 3 is connected or isolated, the third flame-spraying pipe can be connected or isolated from the upper end of the gas-to-gas pipe 3, the second flame-spraying pipe includes a first annular pipe 4 located on one side of the sample fixing device 200, and a plurality of first flame-spraying nozzles 41 are arranged on the first annular pipe 4, the third flame-spraying pipe includes a second annular pipe 5 located on the other side of the sample fixing device 200, the first annular pipe 4 and the second annular pipe 5 together surround the sample fixing device 200, and a plurality of second flame-spraying nozzles 51 are arranged on the second annular pipe 5, the second igniter 12 is used to ignite the gas of the second flame-spraying pipe so that the first flame-spraying nozzle 41 can spray fire toward the electronic product fixed by the sample fixing device 200, and the third igniter is used to ignite the gas of the third flame-spraying pipe so that the second flame-spraying nozzle 51 can spray fire toward the electronic product fixed by the sample fixing device 200.

[0023] Since the electronic product fire resistant combustion test device provided by the present invention is provided with a first flame spraying tube 1, a second flame spraying tube and a third flame spraying tube, the first flame spraying tube 1 can be placed in the first position as required, and then the first igniter 2 ignites the gas of the first flame spraying tube 1 so that the tube mouth 11 of the first flame spraying tube 1 sprays fire toward the electronic product fixed by the sample fixing device 200, or the first flame spraying tube 1 is placed in the second position, and the tube mouth 11 of the first flame spraying tube 1 is butted with the lower end of the gas butt joint tube 3. At this time, the first flame spraying tube 1 does not spray fire but also serves as a gas conduit. Then, the second flame spraying tube is connected or isolated with the upper end of the gas butt joint tube 3, and the third flame spraying tube is connected or isolated with the upper end of the gas butt joint tube 3 as required, so as to realize the first ring tube 4 Any one of the first and second ring tubes 5 works on one side of the electronic product fixed by the sample fixing device 200 so that multiple first flame nozzles 41 or multiple second flame nozzles 51 spray flame on the electronic product, and the first ring tube 4 and the second ring tube 5 both work to achieve surround-type flame spraying of the electronic product fixed by the sample fixing device 200 by multiple first flame nozzles 41 and multiple second flame nozzles 51, thereby selectively achieving multiple flame spraying points and directions to spray flame on the electronic product fixed by the sample fixing device 200, thereby improving the diversity of flame spraying during the fire resistance combustion test of the electronic product. No matter whether the flame is sprayed through the first flame tube 1 or the second flame tube or the third flame tube, it is only necessary to set a gas supply path leading to the first flame tube 1.

[0024] See also Figure 1 and Figure 2 According to a specific embodiment of the present invention, the flame spraying device includes a rotating seat 6 rotatably arranged on the bottom plate of the combustion implementation box 100, a gas mixing chamber is arranged in the rotating seat 6, a first flame spraying pipe 1 is connected to the rotating seat 6 and communicated with the gas mixing chamber, a pipe mouth 11 of the first flame spraying pipe 1 is away from the rotating seat 6, the rotating seat 6 is also connected to a gas connecting pipe 7, and the gas connecting pipe 7 is connected to the gas source after being connected to the gas pipe. The side wall of the combustion implementation box 100 has a channel 102 for the gas pipe to pass through, and the gas connecting pipe 7 is communicated with the gas mixing chamber. When the rotating seat 6 rotates, it drives the first flame spraying pipe 1 to rotate between a first position and a second position. The rotation of the rotating seat 6 can be manually controlled or electrically controlled by an electric control drive device. When the rotating seat 6 rotates, it drives the first flame spraying pipe 1 to rotate at different positions, and the pipe mouth 11 of the first flame spraying pipe 1 can also spray fire on the electronic product fixed by the sample fixing device 200 at different angles.

[0025] According to one embodiment of the present application, the first igniter 2 is an electronic igniter arranged on the rotating seat 6 or on the outside of the first flamethrower 1, and the first igniter 2 has a first arc wire extending into the first flamethrower 1 adjacent to the nozzle 11 of the first flamethrower 1, and the first arc wire passes from the electronic igniter through the wire guide tube 8 to the nozzle 11 of the first flamethrower 1.

[0026] See also Figure 1 and Figure 2 According to one embodiment of the present application, the gas butt-joint pipe 3 is arranged in the vertical direction, and the flame spraying device includes a sealing sleeve 9 which is slidably sleeved on the outer side of the gas butt-joint pipe 3. When the pipe mouth 11 of the first flame spraying pipe 1 is butt-jointed with the lower end of the gas butt-joint pipe 3, the sealing sleeve 9 can slide to a position to seal and surround the gap between the pipe mouth 11 of the first flame spraying pipe 1 and the lower end of the gas butt-joint pipe 3. Considering that the position of the pipe mouth 11 of the first flame spraying pipe 1 should avoid interference with the position of the lower end of the gas butt-joint pipe 3 when the first flame spraying pipe 1 rotates to the second position with the rotating seat 6, in the second position, there is a certain gap between the pipe mouth 11 of the first flame spraying pipe 1 and the lower end of the gas butt-joint pipe 3, and the sealing sleeve 9 just seals and surrounds the gap, so that the gas can flow well from the pipe mouth 11 of the first flame spraying pipe 1 to the gas butt-joint pipe 3 without loss (or almost without loss).

[0027] See also Figure 1 , Figure 2 , Figures 6 to 8 According to a specific embodiment of the present application, the flame spraying device includes a fixing seat 300 connected to the upper end of the gas butt joint pipe 3, the fixing seat 300 can be fixed to the combustion implementation box 100 by a bracket 18, and a first chamber 301, a second chamber 302 and a third chamber 303 are provided in the fixing seat 300, the second chamber 302 and the third chamber 303 are respectively communicated with the first chamber 301, and the first chamber 301 is communicated with the upper end of the gas butt joint pipe 3, and the second flame spraying pipe includes a first transverse pipe 400 penetrated by the fixing seat 300, the first transverse pipe 400 passes through the second chamber 302, one end of the first annular pipe 4 is connected to the first transverse pipe 400 and is in conduction with the inside of the first transverse pipe 400, the axis of the first transverse pipe 400 is arranged in the horizontal direction, and the first transverse pipe 400 can move along its axis and can rotate around its axis. The axis rotates, and the first transverse tube 400 can be connected to or isolated from the second chamber 302 when it moves along its axis. The third flame-spraying tube includes a second transverse tube 10 that is penetrated by the fixing seat 300. The second transverse tube 10 passes through the third chamber 303. One end of the second annular tube 5 is connected to the second transverse tube 10 and is connected to the inside of the second transverse tube 10. The axis of the second transverse tube 10 is arranged in a horizontal direction. The second transverse tube 10 can move along its axis and can rotate around its axis. The second transverse tube 10 can be connected to or isolated from the third chamber 303 when it moves along its axis. In addition, when the first transverse tube 400 rotates around its axis, the flame spraying angle of the first flame-spraying nozzle 41 on the first annular tube 4 is also changed. When the second transverse tube 10 rotates around its axis, the flame spraying angle of the second flame-spraying nozzle 51 on the second annular tube 5 is also changed.

[0028] See also Figures 6 to 8According to one embodiment of the present application, the first transverse tube 400 has a first partition 401, the first partition 401 divides the first transverse tube 400 into a first fire-guiding chamber 402 and a first flame-retardant chamber 403, one end of the first ring tube 4 is connected to the first fire-guiding chamber 402, and the first transverse tube 400 has a first air guide hole 404 on the side wall corresponding to the first fire-guiding chamber 402. When the first transverse tube 400 moves along its axis until the first fire-guiding chamber 402 is in the second chamber 302, the first fire-guiding chamber 402 is connected to the second chamber 302 through the first air guide hole 404. When the first transverse tube 400 moves along its axis until the outer wall of the first flame-retardant chamber 403 crosses the second chamber 302, the first fire-guiding chamber 402 is isolated from the second chamber 302; the second transverse tube 10 (the second transverse tube 10) The internal structure is the same as the internal structure and is therefore not shown in the figure) and has a second partition (which can be understood by referring to the first partition 401), the second partition divides the second transverse tube 10 into a second fire guide chamber (which can be understood by referring to the first fire guide chamber 402) and a second flame retardant chamber (which can be understood by referring to the first flame retardant chamber 403), one end of the second annular tube 5 is connected to the second fire guide chamber, and the side wall of the second transverse tube 10 corresponding to the second fire guide chamber has a second air guide hole (which can be understood by referring to the first air guide hole 404), when the second transverse tube 10 moves along its axis until the second fire guide chamber is in the third chamber 303, the second fire guide chamber is connected to the third chamber 303 through the second air guide hole, and when the second transverse tube 10 moves along its axis until the outer wall of the second flame retardant chamber crosses the third chamber 303, the second fire guide chamber is isolated from the third chamber 303.

[0029] See also Figure 7 and Figure 8 According to one embodiment of the present application, the second igniter 12 is an electronic igniter arranged in the first flame retardant cavity 403, and the second igniter 12 has a second arc wire 13 that passes through the first partition plate 401 and extends into the first ignition chamber 402. When the second igniter 12 is started, the gas in the first ignition chamber 402 is ignited and then ejected from the multiple first flame nozzles 41 of the first ring tube 4; the third igniter (not shown, the position arrangement of the second igniter 12 can be referred to) is an electronic igniter arranged in the second flame retardant cavity, and the third igniter has a third arc wire that passes through the second partition plate and extends into the second ignition chamber. When the third igniter is started, the gas in the second ignition chamber is ignited and then ejected from the multiple second flame nozzles 51 of the second ring tube 5.

[0030] See also Figures 1 to 5 and Fig. 9According to a specific embodiment of the present application, the first transverse tube 400 and the second transverse tube 10 respectively extend out of the combustion implementation box 100, and the first transverse tube locking mechanism and the second transverse tube locking mechanism are arranged on the outer side of the combustion implementation box 100. The first transverse tube locking mechanism and the second transverse tube locking mechanism are, for example, locking clamps (not shown). The first transverse tube locking mechanism is used to lock and fix the first transverse tube 400 or unlock the first transverse tube 400 so that the first transverse tube 400 can move along its axis and rotate around its axis. The second transverse tube locking mechanism is used to lock and fix the second transverse tube 10 or unlock the second transverse tube 10 so that the second transverse tube 10 can move along its axis and rotate around its axis. The rotating seat 6 is connected to a rotating operating rod 14, which extends out of the combustion implementation box 100. The combustion implementation box 100 has an arc guide groove 103 corresponding to the position where the rotating operating rod 14 extends out of the combustion implementation box 100. The section of the rotating operating rod 14 extending out of the combustion implementation box 100 has an external thread. The axis of the rotating operating rod 14 is parallel to the rotation axis of the rotating seat 6. A rotation locking mechanism is provided on the outside of the combustion implementation box 100. The part of the rotating operating rod 14 extending out of the combustion implementation box 100 cooperates with the rotation locking mechanism. The rotation locking mechanism can be a nut 15 installed on the section of the rotating operating rod 14 extending out of the combustion implementation box 100. The rotation locking mechanism is used to lock and fix the rotating operating rod 14 or unlock the rotating operating rod 14.

[0031] See also Figures 1 to 5 and Fig. 9 According to an embodiment of the present application, the sealing sleeve 9 is connected to an adjusting rod 16, and the adjusting rod 16 extends out of the combustion implementation box 100. An adjusting rod 16 support and locking structure is arranged on the outer side of the combustion implementation box 100. The adjusting rod 16 can be vertically moved and can be locked on the adjusting rod 16 support and locking structure. The side wall of the combustion implementation box 100 has a vertical guide groove 104 corresponding to the position where the adjusting rod 16 extends out. The adjusting rod 16 support and locking structure is a double-card hole plate 500 installed on the side wall of the combustion implementation box 100. The double-card hole plate 500 has two card holes 501 arranged from top to bottom. The part where the adjusting rod 16 cooperates with the card hole 501 has a certain elasticity. When subjected to external force, it can move between the two card holes 501 through the through groove 502 between the two card holes 501. When the adjusting rod 16 is in the card hole 501 and is not subjected to external force, it can be maintained in the corresponding card hole 501.

[0032] Of course, the movement and rotation of the first transverse tube 400 and the second transverse tube 10, the movement of the rotating operating rod 14 along the arc guide groove 103, and the up and down movement of the adjusting rod 16 can also be driven by an electric mechanism and locked by the electric mechanism.

[0033] See also Figure 1Regarding the sample fixing device 200, various known clamping, holding or fixture structures can be adopted. According to one embodiment of the present application, the sample fixing device 200 may include a supporting pole 201 and a supporting frame 202 arranged at the bottom of the supporting pole 201. The electronic product is supported on the supporting frame 202 and fixed by movable clamping arms 203 on both sides of the supporting pole 201. The supporting pole 201 can be connected to the cylinder 17 to realize the lifting function. The cylinder 17 is installed above the top plate of the combustion implementation box 100.

[0034] In addition, the present invention also provides an electronic product fire resistant combustion test method, wherein the electronic product fire resistant combustion test method is implemented using the above-mentioned electronic product fire resistant combustion test device, and the electronic product fire resistant combustion test method includes performing an electronic product fire resistant combustion test through a first flame spraying mode, performing an electronic product fire resistant combustion test through a second flame spraying mode, and performing an electronic product fire resistant combustion test through a third flame spraying mode; The fire resistance combustion test of electronic products through the first flame mode includes: R1. Put the electronic product to be tested in the combustion implementation box 100 and fix it on the sample fixing device 200. By rotating the rotating seat 6, the pipe mouth 11 of the first flame spraying tube 1 is separated from the lower end of the gas butt pipe 3. The first flame spraying tube 1 is tilted so that the pipe mouth 11 of the first flame spraying tube 1 faces the electronic product fixed by the sample fixing device 200, and the rotating seat 6 is kept in position. R2, introducing gas into the gas pipe 7, starting the first igniter 2 to ignite so that the nozzle 11 of the first flame spraying pipe 1 sprays fire toward the electronic product fixed by the sample fixing device 200; R3, observe and record the time required for the electronic product to be ignited and the burning duration of the electronic product after the nozzle 11 of the first flame-spraying tube 1 continues to spray fire for a predetermined time and then extinguishes. The preferred value of the test flame duration is 5s, 10s, 20s, 30s, 60s, 120s; R4, take out the tested electronic product, put in a new electronic product to be tested and fix it on the sample fixing device 200, adjust the angle of the rotating seat 6 and keep it at the angle, and then repeat steps R2 and R3; The fire resistance combustion test of electronic products through the second flame mode includes: S1. Put the electronic product to be tested in the combustion implementation box 100 and fix it on the sample fixing device 200. By rotating the rotating seat 6, the pipe mouth 11 of the first flame spraying pipe 1 is docked with the lower end of the gas butt pipe 3. Move the sealing sleeve 9 so that the sealing sleeve 9 surrounds the gap between the pipe mouth 11 of the first flame spraying pipe 1 and the lower end of the gas butt pipe 3. Move the first transverse pipe 400 along its axis to communicate with the second chamber 302, and move the second transverse pipe 10 along its axis to isolate it from the third chamber 303. Of course, the first transverse pipe 400 can also be isolated from the second chamber 302, and the second transverse pipe 10 can be connected to the third chamber 303, and then the corresponding igniter can be turned on and connected; S2, introducing gas into the gas pipe 7, starting the second igniter 12 to ignite so that the plurality of first flame spray nozzles 41 spray fire toward the electronic product fixed by the sample fixing device 200; S3, observe and record the time required for the electronic product to be ignited and observe and record the burning duration of the electronic product after the first flame nozzle 41 continues to spray fire for a predetermined time and extinguishes it. The preferred value of the test flame duration is 5s, 10s, 20s, 30s, 60s, and 120s; S4, take out the tested electronic product, put a new electronic product to be tested back in and fix it on the sample fixing device 200, rotate the first transverse tube 400 around its axis, change the angle of the first transverse tube 400 and keep the first transverse tube 400 at the angle, then repeat steps S2 and S3; The fire resistance combustion test of electronic products through the third flame spray mode includes: T1. Put the electronic product to be tested in the combustion implementation box 100 and fix it on the sample fixing device 200. By rotating the rotating seat 6, the pipe mouth 11 of the first flame spraying pipe 1 is connected with the lower end of the gas butt joint pipe 3. Move the sealing sleeve 9 so that the sealing sleeve 9 surrounds the gap between the pipe mouth 11 of the first flame spraying pipe 1 and the lower end of the gas butt joint pipe 3. Move the first transverse pipe 400 along its axis to communicate with the second chamber 302. Move the second transverse pipe 10 along its axis to communicate with the third chamber 303. T2, introducing gas into the gas pipe 7, starting the second igniter 12 and the third igniter to ignite so that the plurality of first flame spray nozzles 41 and the plurality of second flame spray nozzles 51 spray fire toward the electronic product fixed by the sample fixing device 200; T3, observe and record the time required for the electronic product to be ignited, and observe and record the burning duration of the electronic product after the first flame spray nozzle 41 and the second flame spray nozzle 51 continue to spray fire for a predetermined time and then extinguish. The preferred value of the test flame duration is 5s, 10s, 20s, 30s, 60s, and 120s; T4, take out the tested electronic product, put a new electronic product to be tested back in and fix it on the sample fixing device 200, rotate the first transverse tube 400 around its axis and rotate the second transverse tube 10 around its axis, change the angle of the first transverse tube 400 and keep it at the angle, change the angle of the second transverse tube 10 and keep it at the angle, and then repeat steps T2 and T3.

[0035] It should be noted that the above embodiments only express the preferred implementation of the present application, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the present application. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, such as combining different features in various embodiments, etc., which should all fall within the scope of protection of the present application.

Claims

1. An electronic product fire resistant combustion test device, characterized in that: The electronic product fire resistant combustion test device comprises a combustion implementation box, a flame spraying device and a sample fixing device; The sample fixing device is arranged in the combustion implementation box; The flame spraying device includes a first flame spraying tube, a first igniter, a gas butt joint tube located above the first flame spraying tube, a second flame spraying tube, a second igniter, a third flame spraying tube and a third igniter. The first flame spraying tube is movably arranged on the bottom plate of the combustion implementation box. The first igniter is used to ignite the gas of the first flame spraying tube so that the pipe mouth of the first flame spraying tube can spray fire toward the electronic product fixed by the sample fixing device. The first flame spraying tube can move between a first position and a second position. In the first position, the pipe mouth of the first flame spraying tube is separated from the lower end of the gas butt joint tube. In the second position, the pipe mouth of the first flame spraying tube is butt jointed with the lower end of the gas butt joint tube. The second flame spraying tube can be connected to the upper end of the gas butt joint tube. The mouth is connected or isolated, the third flame-spraying pipe can be connected or isolated with the upper port of the gas butt-joint pipe, the second flame-spraying pipe includes a first annular pipe located on one side of the sample fixing device, and a plurality of first flame-spraying nozzles are arranged on the first annular pipe, the third flame-spraying pipe includes a second annular pipe located on the other side of the sample fixing device, the first annular pipe and the second annular pipe together surround the sample fixing device, and a plurality of second flame-spraying nozzles are arranged on the second annular pipe, the second igniter is used to ignite the gas of the second flame-spraying pipe so that the first flame-spraying nozzle can spray fire toward the electronic product fixed by the sample fixing device, and the third igniter is used to ignite the gas of the third flame-spraying pipe so that the second flame-spraying nozzle can spray fire toward the electronic product fixed by the sample fixing device.

2. The electronic product fire resistance combustion test device according to claim 1, characterized in that: The flame-spraying device includes a rotating seat rotatably arranged on the bottom plate of the combustion implementation box, a gas mixing chamber is arranged in the rotating seat, the first flame-spraying pipe is connected to the rotating seat and communicated with the gas mixing chamber, the pipe mouth of the first flame-spraying pipe is away from the rotating seat, the rotating seat is also connected to a gas connecting pipe, and the gas connecting pipe is communicated with the gas mixing chamber. When the rotating seat rotates, the first flame-spraying pipe is driven to rotate between a first position and a second position.

3. The electronic product fire resistance combustion test device according to claim 2, characterized in that: The first igniter is an electronic igniter arranged on the rotating seat or outside the first flame spraying tube. The first igniter has a first arc wire extending into the first flame spraying tube and adjacent to the tube mouth of the first flame spraying tube.

4. The electronic product fire resistance combustion test device according to claim 3, characterized in that: The gas butt-joint pipe is arranged in a vertical direction, and the flame-spraying device includes a sealing sleeve slidably sleeved on the outer side of the gas butt-joint pipe, and when the pipe mouth of the first flame-spraying pipe is butt-jointed with the lower end of the gas butt-joint pipe, the sealing sleeve can slide to a position to seal and surround the gap between the pipe mouth of the first flame-spraying pipe and the lower end of the gas butt-joint pipe.

5. The electronic product fire resistance combustion test device according to claim 4, characterized in that: The flame spraying device comprises a fixing seat connected to the upper end of the gas butt-joint pipe, wherein a first chamber, a second chamber and a third chamber are arranged in the fixing seat, wherein the second chamber and the third chamber are respectively communicated with the first chamber, wherein the first chamber is communicated with the upper end of the gas butt-joint pipe, wherein the second flame spraying pipe comprises a first transverse pipe penetrating the fixing seat, wherein one end of the first annular pipe is connected to the first transverse pipe and communicated with the inside of the first transverse pipe, wherein the axis of the first transverse pipe is arranged in a horizontal direction, wherein the first transverse pipe can move along its axis and can rotate around its axis, wherein the first transverse pipe can be communicated with or isolated from the second chamber when moving along its axis, and wherein the third flame spraying pipe comprises a second transverse pipe penetrating the fixing seat, wherein one end of the second annular pipe is connected to the second transverse pipe and communicated with the inside of the second transverse pipe, wherein the axis of the second transverse pipe is arranged in a horizontal direction, wherein the second transverse pipe can move along its axis and can rotate around its axis, wherein the second transverse pipe can be communicated with or isolated from the third chamber when moving along its axis.

6. The electronic product fire resistance combustion test device according to claim 5, characterized in that: The first transverse tube has a first partition plate, which divides the first transverse tube into a first fire-conducting chamber and a first flame-retardant chamber. One end of the first annular tube is in communication with the first fire-conducting chamber. The first transverse tube has a first air guide hole on the side wall corresponding to the first fire-conducting chamber. When the first transverse tube moves along its axis to make the first fire-conducting chamber in the second chamber, the first fire-conducting chamber is in communication with the second chamber through the first air guide hole. When the first transverse tube moves along its axis to make the outer wall of the first flame-retardant chamber cross the second chamber, the first fire-conducting chamber is isolated from the second chamber. The second transverse tube has a second partition, which divides the second transverse tube into a second fire guide chamber and a second flame retardant chamber. One end of the second annular tube is connected to the second fire guide chamber. The second transverse tube has a second air guide hole on the side wall corresponding to the second fire guide chamber. When the second transverse tube moves along its axis so that the second fire guide chamber is in the third chamber, the second fire guide chamber is connected to the third chamber through the second air guide hole. When the second transverse tube moves along its axis so that the outer wall of the second flame retardant chamber spans the third chamber, the second fire guide chamber is isolated from the third chamber.

7. The electronic product fire resistance combustion test device according to claim 6, characterized in that: The second igniter is an electronic igniter disposed in the first flame retardant cavity, and the second igniter has a second arc wire extending through the first partition into the first ignition chamber; The third igniter is an electronic igniter arranged in the second flame retardant cavity, and the third igniter has a third arc wire that passes through the second partition plate and extends into the second ignition chamber.

8. The electronic product fire resistance combustion test device according to claim 7, characterized in that: The first transverse tube and the second transverse tube each extend out of the combustion implementation box, and a first transverse tube locking mechanism and a second transverse tube locking mechanism are arranged on the outer side of the combustion implementation box. The first transverse tube locking mechanism is used to lock and fix the first transverse tube or unlock the first transverse tube so that the first transverse tube can move along its axis and rotate around its axis. The second transverse tube locking mechanism is used to lock and fix the second transverse tube or unlock the second transverse tube so that the second transverse tube can move along its axis and rotate around its axis. The rotating seat is connected with a rotating operating rod, which extends out of the combustion implementation box, and the axis of the rotating operating rod is parallel to the rotation axis of the rotating seat. A rotating locking mechanism is arranged on the outer side of the combustion implementation box, and the part of the rotating operating rod extending out of the combustion implementation box cooperates with the rotating locking mechanism. The rotating locking mechanism is used to lock and fix the rotating operating rod or unlock the rotating operating rod.

9. The electronic product fire resistance combustion test device according to claim 8, characterized in that: The sealing sleeve is connected with an adjusting rod, and the adjusting rod extends out of the combustion implementation box. An adjusting rod supporting and locking structure is arranged on the outer side of the combustion implementation box. The adjusting rod can be vertically moved and can be locked on the adjusting rod supporting and locking structure.

10. A fire resistant combustion test method for electronic products, characterized in that: The electronic product fire resistance combustion test method is implemented by using the electronic product fire resistance combustion test device according to claim 9, and the electronic product fire resistance combustion test method includes performing the electronic product fire resistance combustion test through a first flame spraying mode, performing the electronic product fire resistance combustion test through a second flame spraying mode, and performing the electronic product fire resistance combustion test through a third flame spraying mode; The electronic product fire resistance combustion test performed by the first flame spraying mode includes: R1. Put the electronic product to be tested in the combustion implementation box and fix it on the sample fixing device. By rotating the rotating seat, separate the pipe mouth of the first flame spraying pipe from the lower end of the gas butt pipe, and tilt the first flame spraying pipe so that the pipe mouth of the first flame spraying pipe faces the electronic product fixed by the sample fixing device, and then keep the rotating seat in position; R2, introducing gas into the gas pipe, starting the first igniter to ignite so that the nozzle of the first flame spraying pipe sprays fire toward the electronic product fixed by the sample fixing device; R3, observe and record the time required for the electronic product to be ignited and the burning duration of the electronic product after the nozzle of the first flame-spraying tube continues to spray fire for a predetermined time and then extinguishes; R4, take out the tested electronic product, put in a new electronic product to be tested and fix it on the sample fixing device, adjust the angle of the rotating seat and keep it at the angle, and then repeat steps R2 and R3; The electronic product fire resistance combustion test performed by the second flame spraying mode includes: S1. Put the electronic product to be tested in the combustion implementation box and fix it on the sample fixing device, rotate the rotating seat to make the pipe mouth of the first flame spray pipe dock with the lower end of the gas butt joint pipe, move the sealing sleeve so that the sealing sleeve surrounds the gap between the pipe mouth of the first flame spray pipe and the lower end of the gas butt joint pipe, move the first transverse pipe along its axis to communicate with the second chamber, and move the second transverse pipe along its axis to isolate it from the third chamber; S2, introducing gas into the gas pipe, starting the second igniter to ignite so that the plurality of first flame spray nozzles spray fire toward the electronic product fixed by the sample fixing device; S3, observing and recording the time required for the electronic product to be ignited and the burning duration of the electronic product after the first flame nozzle continues to spray fire for a predetermined time and is extinguished; S4, taking out the tested electronic product, re-inserting a new electronic product to be tested and fixing it on the sample fixing device, rotating the first transverse tube around its axis, changing the angle of the first transverse tube and keeping the first transverse tube at the angle, and then repeating steps S2 and S3; The fire resistance combustion test of electronic products by the third flame spraying mode includes: T1. Put the electronic product to be tested in the combustion implementation box and fix it on the sample fixing device, rotate the rotating seat to make the pipe mouth of the first flame spray pipe dock with the lower end of the gas butt joint pipe, move the sealing sleeve to make the sealing sleeve surround the gap between the pipe mouth of the first flame spray pipe and the lower end of the gas butt joint pipe, move the first transverse pipe along its axis to communicate with the second chamber, and move the second transverse pipe along its axis to communicate with the third chamber; T2, introducing gas into the gas pipe, starting the second igniter and the third igniter to ignite so that the plurality of first flame spray nozzles and the plurality of second flame spray nozzles spray fire toward the electronic product fixed by the sample fixing device; T3, observing and recording the time required for the electronic product to be ignited and the burning duration of the electronic product after the first flame spray nozzle and the second flame spray nozzle continue to spray fire for a predetermined time and then extinguish; T4, take out the tested electronic product, put a new electronic product to be tested back in and fix it on the sample fixing device, rotate the first transverse tube around its axis and the second transverse tube around its axis, change the angle of the first transverse tube and keep it at the angle and change the angle of the second transverse tube and keep it at the angle, then repeat steps T2 and T3.

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