Critical oxygen index measuring device

Abstract

The utility model belongs to the technical field of critical oxygen index measuring equipment, and particularly relates to a critical oxygen index measuring device which comprises a base and a stand column, a box body and a fixing frame are arranged at the top of the base, an oxygen pipeline and a nitrogen pipeline are arranged on the side wall of the box body, a gas mixing barrel is arranged at the bottom of an inner cavity of the fixing frame, and a gas outlet is formed in the gas mixing barrel. One end of the oxygen pipeline and one end of the nitrogen pipeline are connected with the gas mixing cylinder, and a gas outlet hole is formed in the top of the fixing frame. In the critical oxygen index measuring process, a tested object can be effectively and vertically fixed, the tested object is clamped more firmly in a clamping mode, and the testing efficiency is improved; and the inclination and collapse phenomena of the object during the test are avoided, so that the test accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of critical oxygen index measuring equipment, in particular to a critical oxygen index measuring device. Background Art

[0002] The critical oxygen index method is to measure the minimum oxygen concentration (molar concentration) required to maintain the combustion of the sample after mixing oxygen / nitrogen. The critical oxygen index meter is a new product developed according to the technical requirements of the national standards GB / T5454-1997 "Textile Combustion Performance Test Method - Oxygen Index Method" and GB / T2406-1993 "Plastic Combustion Performance Test Method - Oxygen Index Method". It is suitable for the combustion performance test of homogeneous solid materials, laminated materials, foam plastics, fabrics, soft films and films. It is mainly used to determine the percentage of oxygen required for the combustion process of polymers. It can be used as a means to identify the flame retardancy of polymers, and can also be used as a research tool - laboratory research on flame retardant formulations, etc.

[0003] In the existing technology, during the critical oxygen index determination process, it is inconvenient to effectively fix the test object vertically, which causes the object to easily tilt and collapse during the test, thereby affecting the accuracy of the test. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the above problems and / or the problems existing in the existing critical oxygen index measuring equipment, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a critical oxygen index measuring device, which can facilitate the effective vertical fixation of the test object during the critical oxygen index measurement process, make the clamping of the test object more secure through the clamping method, avoid the object from tilting and collapsing during the test, thereby improving the accuracy of the test.

[0007] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0008] A critical oxygen index determination device comprises a base and a column, wherein a box body and a fixing frame are arranged on the top of the base, an oxygen pipeline and a nitrogen pipeline are arranged on the side wall of the box body, a gas mixing cylinder is arranged at the bottom of the inner cavity of the fixing frame, one end of the oxygen pipeline and the nitrogen pipeline are connected to the gas mixing cylinder, an air outlet is arranged on the top of the fixing frame, and the gas mixing cylinder is connected to the air outlet, the column is arranged on the top of the fixing frame, a collecting frame is arranged on the top of the column, a combustion bracket is arranged at the bottom of the inner cavity of the collecting frame, a combustion frame is arranged on the top of the combustion bracket, a threaded rod is connected to the inner wall of the combustion frame, a knob is arranged at one end of the threaded rod, a slider is arranged on the side wall of the threaded rod, and clamping blocks are arranged on the tops of the two sliders.

[0009] As a preferred embodiment of the critical oxygen index measuring device described in the utility model, wherein:

[0010] A distribution plate is arranged on the side wall of the inner cavity of the gas mixing cylinder, a plurality of distribution holes are arranged on the distribution plate, a motor is arranged at the bottom of the distribution plate, a rotating rod is arranged on the top of the distribution plate, one end of the rotating rod is connected to the rotating shaft of the motor, and a plurality of stirring rods are arranged on the side wall of the rotating rod.

[0011] As a preferred solution of the critical oxygen index measuring device described in the utility model, a base is arranged on the top of the fixing frame, a combustion tube is inserted on the top of the base, and an opening is arranged on the top of the combustion tube.

[0012] As a preferred solution of the critical oxygen index measuring device described in the utility model, wherein: a support frame is arranged at the bottom of the base, and a rubber pad is arranged at the bottom of the support frame.

[0013] As a preferred solution of the critical oxygen index measuring device described in the utility model, wherein: the threaded rod is a bidirectional screw rod, and the two sliders move relative to each other.

[0014] As a preferred solution of the critical oxygen index measuring device described in the utility model, control valves are provided on both the oxygen pipeline and the nitrogen pipeline.

[0015] As a preferred solution of the critical oxygen index measuring device described in the utility model, the inner walls of the two clamping blocks are provided with anti-slip grooves, and the clamping blocks are slidably connected to the top of the combustion frame.

[0016] Compared with the prior art: In the present application document, 1. The box body is convenient for storing oxygen and nitrogen, the oxygen pipe is convenient for transporting oxygen into the gas mixing cylinder, the nitrogen pipe is convenient for transporting nitrogen into the gas mixing cylinder, the gas mixing cylinder is convenient for mixing oxygen and nitrogen, and the nitrogen-oxygen mixed gas is discharged into the combustion cylinder through the air outlet, the knob is convenient for operating the threaded rod to rotate, the threaded rod is a bidirectional screw, which drives the two sliders to move relative to each other, thereby driving the two clamps to move relative to each other, and the clamps are convenient for clamping and fixing the test items, and the drippings of the test items during combustion fall into the collection through the combustion frame. In the frame, the collection frame is convenient for collecting dripping materials and convenient for centralized cleaning. Therefore, in the process of critical oxygen index determination, it is convenient to effectively fix the test object vertically, and the clamping method makes the clamping of the test object more secure, avoiding the tilting and collapse of the object during the test, thereby improving the accuracy of the test. 2. The distribution plate is convenient for buffering gas and increasing the mixing effect of the gas. The mixed gas is discharged upward through the distribution plate through the distribution holes, and the rotating rod is driven to rotate by the motor, thereby driving the stirring rod to rotate. The stirring rod facilitates the mixing of the mixed gas, thereby improving the mixing efficiency of the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0018] Figure 1 This is a schematic structural diagram of a critical oxygen index measuring device of the utility model;

[0019] Figure 2 This is a schematic diagram of an air outlet of a critical oxygen index measuring device of the utility model;

[0020] Figure 3 This is a schematic diagram of a clamp block of a critical oxygen index determination device of the utility model;

[0021] Figure 4 The utility model is a structural cross-sectional view of a critical oxygen index measuring device.

[0022] In the figure: 100 base, 110 box, 120 fixing frame, 130 oxygen pipeline, 140 nitrogen pipeline, 150 gas mixing cylinder, 160 air outlet, 200 column, 210 collecting frame, 220 combustion bracket, 230 combustion frame, 240 threaded rod, 250 knob, 260 slider, 270 clamping block, 300 distribution plate, 310 distribution hole, 320 motor, 330 rotating rod, 340 stirring rod, 400 base, 410 combustion cylinder. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0025] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0026] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] The utility model provides a critical oxygen index measuring device, please refer to Figure 1-Figure 4, including a base 100 and a column 200, a box body 110 and a fixing frame 120 are fixedly installed on the top of the base 100, an oxygen pipeline 130 and a nitrogen pipeline 140 are connected to the side wall of the box body 110, a gas mixing cylinder 150 is fixedly installed at the bottom of the inner cavity of the fixing frame 120, one end of the oxygen pipeline 130 and the nitrogen pipeline 140 are connected to the gas mixing cylinder 150, an air outlet 160 is opened on the top of the fixing frame 120, and the gas mixing cylinder 150 is connected to the air outlet 160, the column 200 is fixedly installed on the top of the fixing frame 120, a collecting frame 210 is connected to the top of the column 200, a combustion bracket 220 is plugged into the bottom of the inner cavity of the collecting frame 210, a combustion frame 230 is connected to the top of the combustion bracket 220, a threaded rod 240 is rotatably connected to the inner wall of the combustion frame 230, one end of the threaded rod 240 is fixedly connected to a knob 250, and the side wall of the threaded rod 240 A slider 260 is threadedly connected, and a clamping block 270 is fixedly installed on the top of the two sliders 260. Specifically, oxygen and nitrogen can be stored conveniently through the box body 110, oxygen can be transported into the gas mixing cylinder 150 conveniently through the oxygen pipeline 130, and nitrogen can be transported into the gas mixing cylinder 150 conveniently through the nitrogen pipeline 140. The mixed gas of oxygen and nitrogen and the nitrogen-oxygen mixed gas can be discharged into the combustion cylinder 410 through the gas outlet 160 through the gas mixing cylinder 150. The threaded rod 240 can be rotated conveniently through the knob 250. The threaded rod 240 is a bidirectional screw, which drives the two sliders 260 to move relative to each other, thereby driving the two clamping blocks 270 to move relative to each other. The clamping block 270 can be used to clamp and fix the test article. The drippings during the combustion of the test article fall into the collecting frame 210 through the combustion frame 230. The drippings can be collected through the collecting frame 210 for convenient centralized cleaning.

[0028] A base 400 is provided on the top of the fixing frame 120, a combustion tube 410 is plugged into the top of the base 400, and an opening is provided on the top of the combustion tube 410. Specifically, the base 400 is convenient for installing the combustion tube 410, and the opening is convenient for placing the nozzle of the flamethrower, so as to facilitate the combustion test of the test item in the combustion tube 410.

[0029] A support frame is provided at the bottom of the base 100, and a rubber pad is provided at the bottom of the support frame. Specifically, the support frame facilitates the bottom support and positioning of the device, and the rubber pad facilitates increasing the friction of the plane and improving the stability of the device.

[0030] The threaded rod 240 is a bidirectional screw rod, and the two sliders 260 move relative to each other. Specifically, it is convenient to operate the two sliders 260 to move closer to each other or farther away from each other, thereby effectively clamping and fixing the test object.

[0031] The oxygen pipeline 130 and the nitrogen pipeline 140 are both provided with control valves. Specifically, the control valves are used to adjust the flow rate and flow rate of the gas in the pipelines, thereby facilitating control.

[0032] The inner walls of the two clamping blocks 270 are both provided with anti-skid grooves, and the clamping blocks 270 are slidably connected to the top of the combustion frame 230. Specifically, the anti-skid grooves facilitate increasing the stability of the connection between the test article and the clamping blocks 270 and improving the fixing effect.

[0033] Combination Figure 1-Figure 4 The critical oxygen index measuring device of the present embodiment is specifically used as follows: during the critical oxygen index measuring process, the test article is placed on the combustion frame 230, the threaded rod 240 is operated to rotate by the knob 250, and the two sliders 260 are driven to move relative to each other by the threaded rod 240, thereby driving the two clamping blocks 270 to move relative to each other, and the clamping blocks 270 are used to clamp and fix the test article, and the anti-slip grooves are used to increase the clamping stability of the connection between the test article and the clamping blocks 270, and the combustion tube 410 is inserted and fixed on the base 400, so that the combustion tube 410 covers the outside of the test article, and the control The valve adjusts the flow rate and flow of the gas in the corresponding pipeline. Oxygen is transported into the gas mixing cylinder 150 through the oxygen pipeline 130, and nitrogen is transported into the gas mixing cylinder 150 through the nitrogen pipeline 140. Oxygen and nitrogen are mixed through the gas mixing cylinder 150, and the nitrogen-oxygen mixed gas is discharged into the combustion cylinder 410 through the outlet 160. The drippings during the combustion of the test article fall into the collection frame 210 through the combustion frame 230. The collection frame 210 is used to collect the drippings for convenient centralized cleaning. Among them, the internal and external structures of the box body 110 of the utility model are all existing technologies and are not described in detail.

[0034] Figure 4 The structure diagram of the second embodiment of the critical oxygen index measuring device of the utility model is shown. Figure 4 Different from the above-mentioned embodiment, a distribution plate 300 is provided on the side wall of the inner cavity of the gas mixing cylinder 150, and a plurality of distribution holes 310 are provided on the distribution plate 300. A motor 320 is provided at the bottom of the distribution plate 300, and a rotating rod 330 is provided on the top of the distribution plate 300. One end of the rotating rod 330 is connected to the rotating shaft of the motor 320, and a plurality of stirring rods 340 are provided on the side wall of the rotating rod 330. Specifically, the distribution plate 300 is used to buffer the gas and increase the mixing time of the gas. The mixed gas is discharged upward through the distribution holes 310 through the distribution plate 300, and the rotating rod 330 is driven to rotate by the motor 320, thereby driving the stirring rod 340 to rotate. The stirring rod 340 facilitates the uniform mixing of the mixed gas, thereby improving the mixing efficiency of the gas.

[0035] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A critical oxygen index measuring device, characterized in that: The invention comprises a base (100) and a column (200), wherein a box body (110) and a fixing frame (120) are arranged on the top of the base (100), an oxygen pipeline (130) and a nitrogen pipeline (140) are arranged on the side wall of the box body (110), a gas mixing cylinder (150) is arranged at the bottom of the inner cavity of the fixing frame (120), one end of each of the oxygen pipeline (130) and the nitrogen pipeline (140) are connected to the gas mixing cylinder (150), and an air outlet (160) is arranged on the top of the fixing frame (120), and the gas mixing cylinder (150) is connected to the air outlet (160). The column (200) is arranged on the top of the fixing frame (120), a collection frame (210) is arranged on the top of the column (200), a combustion bracket (220) is arranged at the bottom of the inner cavity of the collection frame (210), a combustion frame (230) is arranged on the top of the combustion bracket (220), a threaded rod (240) is connected to the inner wall of the combustion frame (230), a knob (250) is arranged at one end of the threaded rod (240), a slider (260) is arranged on the side wall of the threaded rod (240), and clamping blocks (270) are arranged on the tops of the two sliders (260).

2. A critical oxygen index measuring device according to claim 1, characterized in that: A distribution plate (300) is arranged on the side wall of the inner cavity of the gas mixing cylinder (150), a plurality of distribution holes (310) are arranged on the distribution plate (300), a motor (320) is arranged at the bottom of the distribution plate (300), a rotating rod (330) is arranged on the top of the distribution plate (300), one end of the rotating rod (330) is connected to the rotating shaft of the motor (320), and a plurality of stirring rods (340) are arranged on the side wall of the rotating rod (330).

3. A critical oxygen index measuring device according to claim 1, characterized in that: A base (400) is arranged on the top of the fixing frame (120), a combustion cylinder (410) is inserted into the top of the base (400), and an opening is arranged on the top of the combustion cylinder (410).

4. A critical oxygen index measuring device according to claim 1, characterized in that: A support frame is provided at the bottom of the base (100), and a rubber pad is provided at the bottom of the support frame.

5. A critical oxygen index measuring device according to claim 1, characterized in that: The threaded rod (240) is a bidirectional threaded rod, and the two sliders (260) move relative to each other.

6. A critical oxygen index measuring device according to claim 1, characterized in that: The oxygen pipeline (130) and the nitrogen pipeline (140) are both provided with control valves.

7. A critical oxygen index measuring device according to claim 1, characterized in that: The inner walls of the two clamping blocks (270) are both provided with anti-slip grooves, and the clamping blocks (270) are slidably connected to the top of the combustion frame (230).

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