Device for testing flame retardance of sewing thread

Abstract

The utility model discloses a device for testing the flame retardancy of a sewing thread, and relates to the technical field of testing the flame retardancy of the sewing thread. The controller is arranged on the mounting frame; the gas output assembly is arranged on the mounting frame and electrically connected with the controller, so that oxygen and nitrogen are output according to a certain proportion; the mixing chamber assembly is arranged on the mounting frame and connected with the gas output assembly so as to mix the oxygen and the nitrogen output by the gas output assembly; the gas guide assembly is arranged on the mounting frame, the gas inlet end of the gas guide assembly is connected with the mixing chamber assembly, and the gas guide assembly is electrically connected with the controller; the combustion chamber assembly is arranged on the mounting frame and connected with the exhaust end of the gas guide assembly; and the ignition assembly is arranged on the mounting frame, the fire outlet end of the ignition assembly is connected with the combustion chamber assembly, and the ignition assembly is electrically connected with the controller. The device is automatically controlled, so that the accuracy and the efficiency of the limit oxygen index test experiment of the sewing thread are remarkably improved, the safety of the system is enhanced, and the device has wide applicability and good expansion potential.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewing thread flame resistance test technical field, specifically, relate to a device for sewing thread flame resistance test. BACKGROUND

[0002] Sewing thread flame resistance test is to evaluate its behavior when contacting flame, to ensure its safety performance in specific applications (such as protective clothing, interior decoration materials, etc.).

[0003] Among them, for the limiting oxygen index test of sewing thread flame resistance, the principle is: measure the minimum oxygen concentration (expressed in volume percentage) required to maintain the continuous combustion of sewing thread, usually in a closed combustion chamber, by adjusting the proportion of oxygen and nitrogen in the mixed gas to determine this point, if the limiting oxygen index value is higher, it indicates that the material is more difficult to burn; Therefore, a device for sewing thread flame resistance test is needed to improve the efficiency of the limiting oxygen index test of sewing thread flame resistance. SUMMARY

[0004] The utility model discloses a device for sewing thread flame resistance test is provided, and the device is used to solve the problem of the background art.

[0005] The utility model solves the technical scheme adopted by its technical problem:

[0006] A device for sewing thread flame resistance test, comprising:

[0007] Mounting frame;

[0008] Controller, set up on mounting frame;

[0009] Gas output assembly, set up on mounting frame and with controller electric connection, so that oxygen and nitrogen are output according to certain proportion;

[0010] Mixing chamber assembly, set up on mounting frame and with gas output assembly is connected, to mix the oxygen and nitrogen that the gas output assembly outputs;

[0011] Air guide assembly, set up on mounting frame and gas inlet end are connected with mixing chamber assembly, and with controller electric connection;

[0012] Combustion chamber assembly, set up on mounting frame and with air guide assembly exhaust end is connected;

[0013] Ignition assembly, set up on mounting frame and fire end are connected with combustion chamber assembly, and with controller electric connection.

[0014] The above scheme further, the gas output assembly includes:

[0015] A gas proportioner is arranged on the mounting frame and electrically connected with the controller.

[0016] An oxygen source is arranged on the mounting frame and its output end is connected with the gas proportioner gas inlet end.

[0017] A nitrogen source is arranged on the mounting frame and its output end is connected with the gas proportioner gas inlet end.

[0018] An output pipe is connected with the gas proportioner gas outlet end at one end and connected with the mixing chamber assembly at the other end.

[0019] The gas output assembly further comprises:

[0020] A one-way valve is arranged on the output pipe to avoid backflow of oxygen and nitrogen discharged through the output pipe.

[0021] A flow valve one is arranged on the output pipe and electrically connected with the controller to accurately control the flow of oxygen and nitrogen discharged through the output pipe.

[0022] The mixing chamber assembly comprises:

[0023] A mixing chamber is in a sealed structure, arranged on the mounting frame and connected with the output pipe to mix oxygen and nitrogen therein, and further connected with the gas guide assembly.

[0024] The mixing chamber assembly further comprises:

[0025] An oxygen concentration sensor one is arranged in the mixing chamber and electrically connected with the controller to detect the oxygen concentration in the mixing chamber.

[0026] The mixing chamber assembly further comprises:

[0027] A mixing motor is arranged in the mixing chamber and electrically connected with the controller.

[0028] A mixing rod is connected with the mixing motor.

[0029] A plurality of mixing blades are arranged on the mixing rod to rotate at a certain speed in the mixing chamber by the operation of the mixing motor to rapidly mix oxygen and nitrogen in the mixing chamber.

[0030] The gas guide assembly comprises:

[0031] A gas guide pump is arranged on the mounting frame and electrically connected with the controller.

[0032] An air inlet pipe is connected with the gas guide pump at one end and connected with the mixing chamber at the other end.

[0033] An exhaust pipe is connected to the air guide pump at one end and to the combustion chamber assembly at the other end.

[0034] Further, the air guide assembly further comprises:

[0035] A flow valve two is arranged on the exhaust pipe and electrically connected to the controller to control the flow of the mixed gas output by the exhaust pipe and improve the stability of the mixed gas output.

[0036] Further, the combustion chamber assembly comprises:

[0037] A combustion chamber is arranged on the mounting bracket and is open at the front end and is connected to the fire outlet end of the ignition assembly;

[0038] A sealing door body is arranged on the open end of the combustion chamber and is transparent to facilitate observation of the experimental process by the staff;

[0039] An oxygen concentration sensor two is arranged in the combustion chamber to detect the minimum oxygen concentration value at which the sewing thread can be burned and is electrically connected to the controller;

[0040] A connecting rope is arranged in the combustion chamber;

[0041] A fixing clamp is arranged on the connecting rope to clamp the sewing thread.

[0042] Further, the combustion chamber assembly further comprises:

[0043] An exhaust pipe is arranged on the combustion chamber and is connected to an external exhaust filter;

[0044] A valve is mounted on the exhaust pipe to open after the combustion experiment is completed, so that the harmful gas in the combustion chamber is discharged through the exhaust pipe.

[0045] Further, the ignition assembly comprises:

[0046] An igniter is arranged on the mounting bracket and is electrically connected to the controller;

[0047] An ignition pipe is connected to the end of the igniter;

[0048] A fire outlet pipe is connected to the end of the ignition pipe and extends to the combustion chamber and is located directly below the fixing clamp.

[0049] Compared with the prior art, the beneficial effects of the present application are:

[0050] The utility model discloses a mounting frame, controller, gas output assembly, mixing chamber subassembly, gas guide subassembly, combustion chamber subassembly and the mutual cooperation of kindling subassembly are set up, wherein, the controller is the control center of whole device, is responsible for monitoring and adjusting gas output proportion, mixing process, gas guide flow and kindling operation, realizes the automation control, not only has improved the accuracy and efficiency of experiment significantly, also has strengthened the security of system. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 It is the structural schematic diagram of the utility model;

[0052] Figure 2 It is the installation position schematic diagram of check valve;

[0053] Figure 3 It is the installation position schematic diagram of mixing motor;

[0054] Figure 4 It is the installation position schematic diagram of waste gas pipe;

[0055] Among them: 1, mounting frame;2, controller;3, gas output assembly;31, gas proportioner;32, oxygen source;33, nitrogen source;34, output pipe;35, check valve;36, flow valve one;4, mixing chamber subassembly;41, mixing chamber;42, oxygen concentration sensor one;43, mixing motor;44, mixing rod;45, mixing blade;5, gas guide subassembly;51, gas guide pump;52, inlet pipe;53, exhaust pipe;54, flow valve two;6, combustion chamber subassembly;61, combustion chamber;62, sealing door body;63, oxygen concentration sensor two;64, sling;65, fixed clamp;66, waste gas pipe;67, valve;7, kindling subassembly;71, igniter;72, kindling pipe;73, out fire pipe. DETAILED DESCRIPTION

[0056] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings of the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of protection of the utility model. The utility model is further explained in combination with the drawings and the embodiments:

[0057] Referring to the drawings Figure 1 As shown in the drawings, a device for sewing thread flame retardant test comprises:

[0058] The mounting frame 1 is arranged on the ground to support and install;

[0059] The controller 2 is arranged on the mounting frame 1;

[0060] a gas output assembly 3 arranged on the mounting frame 1 and electrically connected with the controller 2 to output oxygen and nitrogen according to a certain proportion;

[0061] a mixing chamber assembly 4 arranged on the mounting frame 1 and connected with the gas output assembly 3 to mix the oxygen and nitrogen output by the gas output assembly 3;

[0062] a gas guide assembly 5 arranged on the mounting frame 1 and having an air inlet end connected with the mixing chamber assembly 4 and electrically connected with the controller 2;

[0063] a combustion chamber assembly 6 arranged on the mounting frame 1 and having an air outlet end connected with the gas guide assembly 5 and arranged to accommodate a sewing thread;

[0064] an ignition assembly 7 arranged on the mounting frame 1 and having an ignition end connected with the combustion chamber assembly 6 and electrically connected with the controller 2.

[0065] In the specific implementation process, the controller 2 serves as the control center of the entire device and is responsible for monitoring and adjusting the gas output proportion, the mixing process, the gas guide flow rate and the ignition operation, etc. In use, the sewing thread is fixed in the combustion chamber assembly 6, the gas output assembly 3 outputs oxygen and nitrogen according to the set proportion (the required oxygen and nitrogen proportion is set by the controller 2, and the test usually starts from a high oxygen concentration), then the mixing chamber assembly 4 receives and mixes the two gases to ensure a uniform mixing state, then the gas guide assembly 5 guides the mixed gas into the combustion chamber assembly 6, then the ignition assembly 7 ignites the sewing thread to start the combustion experiment, and finally the lowest oxygen concentration value that makes the sewing thread just maintain combustion is recorded as the limiting oxygen index according to the experiment.

[0066] In the above scheme, the structure of the gas output assembly 3 is specifically described with reference to the accompanying drawings. Figure 1 As shown in the drawings, the gas output assembly 3 comprises:

[0067] a gas proportioner 31 arranged on the mounting frame 1 and electrically connected with the controller 2;

[0068] an oxygen source 32 arranged on the mounting frame 1 and having an output end connected with an air inlet end of the gas proportioner 31;

[0069] a nitrogen source 33 arranged on the mounting frame 1 and having an output end connected with an air inlet end of the gas proportioner 31;

[0070] an output pipe 34 having one end connected with an air outlet end of the gas proportioner 31 and the other end connected with the mixing chamber assembly 4;

[0071] In the scheme, according to the experimental requirements, the required oxygen and nitrogen ratio is set, the pressure and purity of the oxygen source 32 and the nitrogen source 33 are confirmed to meet the requirements, and the pressure reducing valve on each is adjusted to the appropriate working pressure, then the gas is input into the gas input end of the gas proportioner 31, then the gas proportioner 31 accurately adjusts the flow of oxygen and nitrogen according to the preset ratio, and the proportional gas is delivered to the mixing chamber assembly 4 through the output pipe 34;

[0072] In addition, considering the use effect of the gas output assembly 3, for this purpose, referring to the attached Figure 2 As shown in the figure, the gas output assembly 3 also includes:

[0073] The one-way valve 35 is arranged on the output pipe 34 to avoid backflow of oxygen and nitrogen discharged through the output pipe 34;

[0074] The flow valve 36 is arranged on the output pipe 34 and is electrically connected with the controller 2 to accurately control the flow of oxygen and nitrogen discharged through the output pipe 34.

[0075] In the above scheme, for the structure of the mixing chamber assembly 4, referring to the attached Figure 1 As shown in the figure, the mixing chamber assembly 4 includes:

[0076] The mixing chamber 41 is in a sealed structure, arranged on the mounting frame 1 and connected with the output pipe 34 to mix the oxygen and nitrogen therein, and also connected with the gas guide assembly 5;

[0077] In addition, in order to improve the detection accuracy, for this purpose, referring to the attached Figure 2 As shown in the figure, the mixing chamber assembly 4 also includes:

[0078] The oxygen concentration sensor 42 is arranged in the mixing chamber 41 and is electrically connected with the controller 2 to detect the oxygen concentration in the mixing chamber 41, for example: when the oxygen concentration sensor detects that the oxygen flow in the mixing chamber 41 is different from the initial set oxygen concentration, at this time, the mixing chamber assembly 4 adjusts the output ratio of oxygen, and vice versa.

[0079] In addition, considering the mixing effect of oxygen and nitrogen in the mixing chamber 41, for this purpose, referring to the attached Figure 3 As shown in the figure, the mixing chamber assembly 4 also includes:

[0080] The mixing motor 43 is arranged in the mixing chamber 41 and is electrically connected with the controller 2;

[0081] The mixing rod 44 is connected with the mixing motor 43;

[0082] The mixing blades 45 are arranged on the mixing rod 44 to make the mixing motor 43 operate to rotate the mixing blades 45 at a certain speed in the mixing chamber 41, realizing the rapid mixing of oxygen and nitrogen in the mixing chamber 41.

[0083] In the above scheme, for the structure of the air guide assembly 5, refer to the attached Figure 1 As shown, the air guide assembly 5 comprises:

[0084] The air guide pump 51 is arranged on the mounting frame 1 and electrically connected with the controller 2.

[0085] The air inlet pipe 52 is connected with the air guide pump 51 at one end and connected with the mixing chamber 41 at the other end.

[0086] The air outlet pipe 53 is connected with the air guide pump 51 at one end and connected with the combustion chamber assembly 6 at the other end.

[0087] Among them, considering the stability of the air guide assembly 5 to the mixed gas output, for this purpose, refer to the attached Figure 1 As shown, the air guide assembly 5 further comprises:

[0088] The flow valve 54 is arranged on the air outlet pipe 53 and electrically connected with the controller 2 to control the flow of the mixed gas output by the air outlet pipe 53, thereby improving the stability of the mixed gas output.

[0089] In the above scheme, for the structure of the combustion chamber assembly 6, refer to the attached Figure 1 As shown, the combustion chamber assembly 6 comprises:

[0090] The combustion chamber 61 is arranged on the mounting frame 1 and open at the front end, and connected with the ignition assembly 7.

[0091] The sealing door body 62 is arranged on the open end of the combustion chamber 61 and is transparent to facilitate observation by the staff during the experiment.

[0092] The oxygen concentration sensor 63 is arranged in the combustion chamber 61 to detect the minimum oxygen concentration value that can just maintain the combustion of the sewing thread and is electrically connected with the controller 2.

[0093] The connecting rope is arranged in the combustion chamber 61.

[0094] The fixing clamp 65 is arranged on the connecting rope to clamp the sewing thread.

[0095] In the scheme, the sewing thread is clamped vertically on the fixing clamp 65, so that the sewing thread is in a vertical state, then the sealing door body 62 is closed, and then the combustion experiment can be started.

[0096] In addition, considering that there are harmful gases in the combustion process of the sewing thread, for this purpose, refer to the attached Figure 4 As shown, the combustion chamber assembly 6 further comprises:

[0097] The exhaust pipe 66 is arranged on the combustion chamber 61 and connected with the external exhaust filter.

[0098] A valve 67 is installed on the exhaust pipe 66 to open after the combustion experiment is finished, so that the harmful gas in the combustion chamber 61 is discharged through the exhaust pipe 66.

[0099] In the above solution, the structure of the ignition assembly 7 is specifically described with reference to the accompanying drawings. Figure 1 As shown in the drawings, the ignition assembly 7 comprises:

[0100] An igniter 71 is arranged on the mounting frame 1 and electrically connected with the controller 2;

[0101] An ignition pipe 72 is connected with the end of the igniter 71;

[0102] An outflow pipe 73 is connected with the end of the ignition pipe 72 and extends to the combustion chamber 61 and is directly below the fixed clamp 65;

[0103] In the solution, the igniter 71 ignites, the ignition is guided to the position of the outflow pipe 73 through the ignition pipe 72, and then the outflow pipe 73 is aligned with the sewing thread and ignites the sewing thread.

[0104] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A device for sewing thread flame resistance test, comprising a mounting frame (1) and a controller (2), characterized in that: Further comprising: a gas output assembly (3) arranged on the mounting frame (1) and electrically connected with the controller (2) to output oxygen and nitrogen in a certain proportion; a mixing chamber assembly (4) arranged on the mounting frame (1) and connected with the gas output assembly (3) to mix the oxygen and nitrogen output by the gas output assembly (3); a gas guide assembly (5) arranged on the mounting frame (1) and connected with the mixing chamber assembly (4) at the gas inlet end and electrically connected with the controller (2); a combustion chamber assembly (6) arranged on the mounting frame (1) and connected with the gas guide assembly (5) at the gas outlet end; a fire ignition assembly (7) arranged on the mounting frame (1) and connected with the combustion chamber assembly (6) at the fire outlet end and electrically connected with the controller (2).

2. The device for sewing thread flame resistance test according to claim 1, characterized in that: The gas output assembly (3) comprises: a gas proportioner (31) arranged on the mounting frame (1) and electrically connected with the controller (2); an oxygen source (32) arranged on the mounting frame (1) and connected with the gas proportioner (31) at the gas inlet end; a nitrogen source (33) arranged on the mounting frame (1) and connected with the gas proportioner (31) at the gas inlet end; an output pipe (34) connected with the gas proportioner (31) at the gas outlet end and connected with the mixing chamber assembly (4).

3. The device for sewing thread flame resistance test according to claim 2, characterized in that: The gas output assembly (3) further comprises: a one-way valve (35) arranged on the output pipe (34); a flow valve (36) arranged on the output pipe (34) and electrically connected with the controller (2).

4. The device for sewing thread flame resistance test according to claim 3, characterized in that: The mixing chamber assembly (4) comprises: a mixing chamber (41) in a sealed structure arranged on the mounting frame (1) and connected with the output pipe (34) and the gas guide assembly (5); an oxygen concentration sensor (42) arranged in the mixing chamber (41) and electrically connected with the controller (2).

5. The device for sewing thread flame resistance test according to claim 4, characterized in that: The mixing chamber assembly (4) further comprises: a mixing motor (43) arranged in the mixing chamber (41) and electrically connected with the controller (2); a mixing rod (44) connected with the mixing motor (43); a plurality of mixing blades (45) arranged on the mixing rod (44).

6. The device for sewing thread flame resistance test according to claim 5, characterized in that: The gas guide assembly (5) comprises: a gas guide pump (51) arranged on the mounting frame (1) and electrically connected with the controller (2); an air inlet pipe (52) connected with the gas guide pump (51) at one end and connected with the mixing chamber (41) at the other end; an air outlet pipe (53) connected with the gas guide pump (51) at one end and connected with the combustion chamber assembly (6) at the other end.

7. The device for testing the flame resistance of sewing thread according to claim 6, characterized in that: the air guide assembly (5) further comprises: a flow valve two (54) arranged on the exhaust pipe (53) and electrically connected with the controller (2).

8. The device for testing the flame resistance of sewing thread according to claim 7, characterized in that: the combustion chamber assembly (6) comprises: a combustion chamber (61) arranged on the mounting frame (1) and with an open front end, and connected with the fire outlet end of the ignition assembly (7); a sealing door body (62) arranged on the open end of the combustion chamber (61) and transparent; an oxygen concentration sensor two (63) arranged in the combustion chamber (61) and electrically connected with the controller (2); a connecting rope arranged in the combustion chamber (61); a fixed clamp (65) arranged on the connecting rope for clamping the sewing thread.

9. The device for testing the flame resistance of sewing thread according to claim 8, characterized in that: the combustion chamber assembly (6) further comprises: an exhaust pipe (66) arranged on the combustion chamber (61) and used for connecting with an external exhaust filter; a valve (67) mounted on the exhaust pipe (66).

10. The device for testing the flame resistance of sewing thread according to claim 9, characterized in that: the ignition assembly (7) comprises: an igniter (71) arranged on the mounting frame (1) and electrically connected with the controller (2); an ignition tube (72) connected with the end of the igniter (71); a fire outlet tube (73) connected with the end of the ignition tube (72) and extending to the combustion chamber (61) and located directly below the fixed clamp (65).

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