CN211741183U - High-temperature oxygen index tester - Google Patents

Abstract

The utility model relates to a high temperature oxygen index tester, use in material fire behaviour detection area, it is including detecting the cabinet, be equipped with the workstation that separates into upper and lower two parts with detecting the cabinet in the detection cabinet, fixedly connected with base on the workstation, be equipped with the holding frame on the base, the base is located the below of holding frame and has seted up the gas transmission hole, fixedly connected with preheats the resistance wire on the base, be equipped with the glass pipe on the base, the glass pipe cover is established in the outside of holding frame and preheating the resistance wire, and the glass pipe is cut into two parts along a certain diameter in its cross-section, be equipped with mutually supported inserted block and slot on the relative lateral wall of glass pipe two parts respectively. The utility model discloses have through setting up the spread groove, the glass pipe of being convenient for and the dismantlement and the connection of base, simultaneously through managing the two parts that set up to alternate segregation with glass, the staff of being convenient for takes off and carries out thorough and careful clearance to the glass inside pipe wall behind the glass pipe, has reduced the effect that the smoke and dust adheres to the hindrance of staff to the experimental result observation.

Description

High-temperature oxygen index tester

Technical Field

The utility model belongs to the technical field of the technique that material flame retardant property detected and specifically relates to a high temperature oxygen index tester is related to.

Background

The oxygen index tester is used for measuring the combustion performance of various textiles including woven fabrics, knitted fabrics, non-woven fabrics and the like, and can also be used for measuring the combustion performance of plastics, rubber, paper and the like. High temperature oxygen index meters are commonly used to measure the proportion of sample oxygen required for a material to start burning at a temperature that will allow the material to be tested for its ability to resist fire under high temperature conditions, such as a fire.

Chinese patent with publication number CN206362756U discloses an intelligence oxygen index tester, the power distribution box comprises a box body, box internally mounted PLC controller and adjusting device, operating panel is connected to the PLC controller, operating panel installs at the box surface, last installation display screen of operating panel and the operation button, intelligence oxygen index tester still includes the oxygen cylinder, the nitrogen gas jar, the breather pipe of oxygen cylinder and nitrogen gas jar passes through the synthetic hybrid line of venturi mixer, hybrid line connects gas nozzle, gas nozzle installs the bottom at gaseous vortex device, gaseous vortex device top is equipped with the venthole, gaseous leakage room is installed to gaseous vortex device top, the outdoor face installation glass cover of gaseous leakage room.

The above prior art solutions have the following drawbacks: in the detection process, if the flame retardant property of the detected material is not up to the standard, the material is ignited and burnt under the action of heating and ignition, and opaque attachments are generated on the glass cover, so that the glass cover of the instrument is not easy to disassemble and clean, and the observation of a worker on the test result is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high temperature oxygen index tester convenient to glass pipe dismantle and clear up to the not enough of prior art existence.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a high-temperature oxygen index tester comprises a detection cabinet, wherein a workbench which divides the detection cabinet into an upper part and a lower part is arranged in the detection cabinet, a base is fixedly connected onto the workbench, a clamping frame is arranged on the base, an air delivery hole is formed in the position, below the clamping frame, of the base, a preheating resistance wire is fixedly connected onto the base, the preheating resistance wire spirally extends in the axial direction of the clamping frame and upwards, a glass tube is arranged on the base, the glass tube is covered on the outer sides of the clamping frame and the preheating resistance wire, a connecting groove matched with the bottom end of the glass tube is formed in the upper side of the base, the glass tube is divided into two parts along a certain diameter of the cross section of the glass tube, mutually matched inserting blocks and inserting grooves are respectively arranged on the opposite side walls of the two parts of the glass tube, fixing rings are respectively sleeved on the top end and the bottom end of the glass tube, and a limiting boss is arranged on one, the gas transmission device is characterized in that an oxygen cylinder and a nitrogen cylinder are arranged below the workbench in the detection cabinet, two regulating valves are arranged in the detection cabinet, the oxygen cylinder and the nitrogen cylinder are communicated with the regulating valves respectively, and the output end of each regulating valve is communicated with a gas transmission hole.

By adopting the technical scheme, in the actual detection process, the detected material is fixed on the clamping frame, a worker opens the regulating valve to enable the air flow formed by mixing oxygen and nitrogen in proportion to be full in the glass tube and then starts the preheating resistance wire to heat the detected material to the preset temperature, then the worker slowly regulates the proportion of the oxygen and the nitrogen, detects the oxygen index required by the combustion of the material at the specified temperature by visually observing whether the detected material is combusted, the detected material can generate smoke after being ignited, the smoke is attached to the material and easily influences the observation of the worker, therefore, the worker extracts the glass tube from the connecting groove of the base after the detection is finished, takes the fixing ring off the glass tube, separates the two parts of the glass tube from each other, is convenient for wiping and cleaning the inner side wall of the glass tube, avoids the influence of the smoke on the test observation, and during the installation, the staff at first with the inserted block and the slot on the two parts of glass pipe each other lock, then will fix the upper and lower both ends of establishing the glass pipe with solid fixed ring cover, insert the test can begin in the spread groove with glass socle end at last.

The utility model discloses further set up to: be equipped with a plurality of stands on the base, the stand is in the circumference evenly distributed of glass pipe, and is a plurality of the top of stand is connected with an apron jointly, and is a plurality of the equal coaxial fixedly connected with diameter in top of stand is less than the screw thread post of stand, the through-hole has all been seted up on the corresponding position of apron and screw thread post, through-hole diameter and screw thread post phase-match, the top threaded connection that the screw thread post is located the apron has gland nut, apron central authorities have seted up the air vent, the air vent is less than the diameter of glass pipe with the coaxial and diameter of glass pipe.

Through adopting above-mentioned technical scheme, through setting up apron and stand, after glass manages and inserts the spread groove, the staff will lap the top of placing glass pipe to make each screw thread post stretch into the through-hole, then compress tightly the apron through clamp bolt, thereby make the apron support tight glass pipe, reduced glass pipe and taken place to rock or slope in the experimentation, cause the possibility of potential safety hazard.

The utility model discloses further set up to: the utility model discloses a mixing kettle, including detection cabinet, mixing kettle, fixedly connected with two input tubes on the mixing kettle, two input tubes communicate with the output of two governing valves respectively, mixing kettle's output and gas transmission hole intercommunication, fixedly connected with driving motor on the mixing kettle lateral wall, driving motor's motor shaft penetrates in mixing kettle and rotates with mixing kettle lateral wall and be connected, driving motor's motor shaft stretches into fixedly connected with blade on the circumference lateral wall of mixing kettle one end.

Through adopting above-mentioned technical scheme, through setting up the mixing kettle, when oxygen and nitrogen gas got into the mixing kettle respectively, driving motor began work and was rotary motion through the epaxial blade of driving motor, made oxygen and nitrogen gas rapid misce bene, reduced in the air current oxygen and nitrogen gas in quick transportation process the uneven possibility that causes the influence to the test result.

The utility model discloses further set up to: and a heating device is fixedly connected in the mixing kettle.

Through adopting above-mentioned technical scheme, through set up heating device in mixing the cauldron, reduced the air current that blows in the glass pipe and the difference in temperature between the material under test, reduced the air current and blown to cause the influence to the temperature of the material under test when being surveyed the material to influence the possibility of experimental result reliability.

The utility model discloses further set up to: and an air filtering device is fixedly connected above the cover plate.

Through adopting above-mentioned technical scheme, through setting up air filter, the harmful smoke and dust that probably produces when reducing the interior material burning spreads the ambient environment in, and the contaminated air threatens the healthy possibility of staff.

The utility model discloses further set up to: an oxygen content detection device is arranged in the detection cabinet, and a detection head of the oxygen content detection device is positioned on the inner side of the gas transmission hole.

Through adopting above-mentioned technical scheme, carry out real-time detection to the oxygen content that gets into the intraductal air current of glass through oxygen content testing device to give the staff with the testing result feedback, the staff carries out further adjustment to the governing valve according to the testing result, thereby has improved the accuracy nature of testing result.

The utility model discloses further set up to: the detection cabinet is located below the workbench and is connected with a gas cylinder bracket in a sliding mode.

Through adopting above-mentioned technical scheme, through setting up the gas cylinder bracket, oxygen cylinder and nitrogen cylinder are all placed on the gas cylinder bracket, and when oxygen cylinder or nitrogen cylinder need be changed, the staff drags oxygen cylinder and nitrogen cylinder outside detecting the cabinet through dragging the gas cylinder bracket, is convenient for change oxygen cylinder or nitrogen cylinder.

The utility model discloses further set up to: and the gas cylinder bracket is fixedly connected with a stabilizing frame.

Through adopting above-mentioned technical scheme, through setting up stable frame, reduced oxygen cylinder or nitrogen cylinder and taken place the possibility of empting in the motion process, promoted the stability of device.

To sum up, the utility model discloses a beneficial technological effect does:

1. the glass tube and the base are convenient to detach and connect by arranging the connecting groove, and meanwhile, the glass tube is arranged into two mutually separated parts, so that a worker can conveniently and thoroughly and carefully clean the inner wall of the glass tube after taking off the glass tube, and the obstruction of smoke dust adhesion to the worker on the observation of an experimental result is reduced;

2. by arranging the mixing kettle, nitrogen and oxygen are fully mixed before entering the glass cover and being based on the material to be detected, so that the possibility of deviation of a detection result caused by insufficient air flow mixing is reduced;

3. through setting up air filter, when being surveyed the material because fire behavior is not up to standard and burning and produce harmful smoke and dust, filter equipment filters the absorption with harmful smoke and dust to the possibility that harmful smoke and dust causes harm to staff's health in spreading to the surrounding environment has been reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present embodiment for embodying the whole apparatus.

Fig. 2 is a schematic diagram of an explosion structure of the device for embodying the glass tube, the column, and the like in the embodiment.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.

Fig. 4 is a partially enlarged schematic view of a portion B in fig. 2.

Fig. 5 is a schematic diagram of a mixing still and an input tube structure according to the present embodiment.

FIG. 6 is a schematic sectional view of the internal mechanism of the mixing tank according to this embodiment.

In the figure, 1, a detection cabinet; 2. a work table; 3. a base; 31. a clamping frame; 32. a gas transmission hole; 33. preheating a resistance wire; 34. connecting grooves; 35. a column; 351. a threaded post; 352. a compression nut; 36. a cover plate; 361. a through hole; 362. a vent hole; 363. an air filtration device; 4. a glass tube; 41. inserting a block; 42. a slot; 43. a limiting boss; 44. a fixing ring; 5. an oxygen cylinder; 51. a nitrogen gas cylinder; 6. adjusting a valve; 7. a mixing kettle; 71. an input tube; 72. a drive motor; 721. a blade; 73. a heating device; 8. an oxygen detection device; 9. a gas cylinder bracket; 91. And (6) stabilizing the frame.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses a high temperature oxygen index tester, including detecting cabinet 1, detect workstation 2 that is on a parallel with ground setting behind the 1 internal fixed connection of cabinet, two parts about workstation 2 separates into the inner space that detects cabinet 1, and two parts are equipped with the cabinet door respectively about detecting cabinet 1. Wherein the cabinet door of the upper half part is made of transparent material. 2 upside fixedly connected with bases 3 of workstation have set firmly holding frame 31 on base 3, and holding frame 31 is vertical upwards extension, and the top is most advanced tapered rod, and the fixed orifices has been seted up in advance to the work piece when fixed through clamping device, penetrates the fixed orifices through holding frame 31 and fixes the material under test.

Referring to fig. 2 and 3, the base 3 is provided with an air delivery hole 32 under the clamping frame 31, the base 3 is fixedly provided with a breathable net on the air delivery hole 32, and the fixing frame is fixedly connected with the breathable net. The base 3 is fixedly connected with a preheating resistance wire 33, and the preheating resistance wire 33 extends upwards in a spiral shape and is arranged around the clamping frame 31. An annular connecting groove 34 (figure 4) is formed in the base 3, the glass tube 4 is arranged on the base 3, and the connecting groove 34 is matched with the bottom end of the glass tube 4 in shape. Glass pipe 4 separates for two parts along the diameter direction of its cross section, is equipped with the inserted block 41 and the slot 42 of mutual adaptation on the relative lateral wall of two parts respectively, and the top and the bottom of glass pipe 4 are equipped with the solid fixed ring 44 that is used for fixed glass pipe 4 two parts respectively by the cover, and glass pipe 4 is located two solid fixed ring 44 and all is equipped with spacing boss 43 to one side to right, gu fixed ring 44 contradicts with spacing boss 43. Be equipped with oxygen content detection device in the detection cabinet 1, oxygen content detection device's detecting head penetrates gas transmission hole 32 inboard to carry out real time monitoring to the oxygen proportion of the air current through gas transmission hole 32, the staff of being convenient for adjusts governing valve 6 according to the data of feedback, and then has promoted the reliability of detection data.

Referring to fig. 2, a plurality of vertical upright columns 35 extending upwards are fixedly connected to the base 3, the upright columns 35 are uniformly distributed along the circumferential direction of the glass tube 4, threaded columns 351 are fixedly connected to the top ends of the upright columns 35, a cover plate 36 is connected to the top end of each upright column 35, and a vent hole 362 coaxial with the glass tube 4 and having a diameter smaller than the cross-sectional diameter of the glass tube 4 is formed in the cover plate 36. All set up on the corresponding position of stand 35 with the through-hole 361 to the adaptation of screw post 351 on the apron 36, screw post 351 passes apron 36 and is located the one end threaded connection who laps 36 top and has gland nut 352, and apron 36 supports tightly with the glass pipe 4 top, and gland nut 352 supports tightly with the apron 36 upside. The pressing plate is tightly abutted against the glass tube 4, so that the possibility of toppling the glass tube 4 is reduced. The top end of the cover plate 36 is provided with the air filtering device 363, the air filtering device 363 covers the vent hole 362, and the situation that harmful smoke generated when the fireproof performance of the tested material is unqualified and the material is burnt is diffused to the surrounding environment to influence the health of working personnel is reduced. The air filter 363 is a high temperature resistant air filter.

Referring to fig. 1 and 5, an oxygen cylinder 5 and a nitrogen cylinder 51 are arranged below the workbench 2, two regulating valves 6 are arranged on the inner side of the detection cabinet 1, and knobs of the regulating valves 6 extend out of the detection cabinet 1 and are located on a control panel of the detection cabinet 1. The oxygen cylinder 5 and the nitrogen cylinder 51 are both communicated with the regulating valve 6. One side that is located two governing valves 6 in detecting cabinet 1 is equipped with mixing kettle 7, and the equal fixedly connected with input tube 71 of output of two governing valves 6, two input tubes 71 all communicate with mixing kettle 7.

Referring to fig. 6, a driving motor 72 is fixedly connected to the outer side wall of the mixing kettle 7, and a motor shaft of the driving motor 72 penetrates into the mixing kettle 7 and is rotatably connected with the side wall of the mixing kettle 7 through a sealed bearing. The motor shaft of the driving motor 72 is fixedly connected with a blade 721 on the circumferential side of one end in the mixing kettle 7, and the output end of the mixing kettle 7 is communicated with the air delivery hole 32. After the gas output by the oxygen cylinder 5 and the nitrogen cylinder 51 enters the mixing kettle 7, the blades 721 are driven to rotate by the driving motor 72, so that the gas flow is disturbed, the gas flow is fully mixed, and the possibility that the experimental result is deviated due to different oxygen contents of the gas flow contacted with each part of the detected material when the gas flow is insufficiently mixed is reduced. Be equipped with heating device 73 in the hybrid kettle 7, heating device 73 is spiral helicine resistance wire to reduced the device in the testing process difference in temperature between mist and the material being tested, caused the influence to the temperature of the material being tested when having reduced the air current and having blown the material being tested, thereby influence the possibility of experimental result.

Referring to fig. 1, there is a gas cylinder bracket 9 slidably connected to the bottom wall of the detection cabinet 1, the oxygen cylinder 5 and the nitrogen cylinder 51 are placed on the gas cylinder bracket 9, and the worker needs to replace the oxygen cylinder 5 or the nitrogen cylinder 51 by partially pulling out the gas cylinder bracket 9 from the detection cabinet 1. The replacement operation is convenient. The gas cylinder bracket 9 is provided with the stabilizing frame 91, and the oxygen cylinder 5 and the nitrogen cylinder 51 are limited by the stabilizing frame 91, so that the possibility of toppling over when the gas cylinder bracket 9 moves is reduced.

The implementation principle of the embodiment is as follows: in the actual detection process, the staff firstly unscrews each gland nut 352 from the double-screw bolt, and take off apron 36 and air cleaner in step, and will be surveyed on the material inserts holding frame 31, and then reinstallate the apron 36, and open nitrogen gas's governing valve 6, start the waste heat resistance wire and will be surveyed the work piece and heat to appointed temperature after making 4 internal nitrogen of glass pipe full of, the governing valve 6 of oxygen is adjusted slowly afterwards, increase the oxygen proportion slowly, until the highest oxygen content of required test, the staff observes the condition in the glass pipe 4 in order to know the experimental result.

When the material to be tested is ignited and smoke dust attachments are generated on the inner side wall of the glass tube 4, a worker firstly closes the oxygen regulating valve 6, stops oxygen supply to extinguish the fire, then opens the cabinet door, takes down the cover plate 36 after the glass tube 4 is restored to the room temperature, takes out the glass tube 4 from the connecting groove 34, then takes down the fixing ring 44 and separates the two parts of the glass tube 4, is convenient for cleaning the inner side wall of the glass tube 4 through objects such as brushes and the like, and puts back each part according to the sequence opposite to the disassembly steps after the smoke dust attachments are cleaned up, and waits for the next test.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. A high temperature oxygen index tester is characterized in that: comprises a detection cabinet (1), a workbench (2) which separates the detection cabinet (1) into an upper part and a lower part is arranged in the detection cabinet (1), a base (3) is fixedly connected on the workbench (2), a clamping frame (31) is arranged on the base (3), an air delivery hole (32) is arranged below the clamping frame (31) of the base (3), a preheating resistance wire (33) is fixedly connected on the base (3), the preheating resistance wire (33) spirally surrounds the axial direction of the clamping frame (31) and extends upwards, a glass tube (4) is arranged on the base (3), the glass tube (4) is covered on the outer sides of the clamping frame (31) and the preheating resistance wire (33), a connecting groove (34) matched with the bottom end of the glass tube (4) is arranged on the upper side of the base (3), and the glass tube (4) is divided into two parts along a certain diameter of the section of the glass tube (4), be equipped with inserted block (41) and slot (42) of mutually supporting on the relative lateral wall of glass pipe (4) two parts respectively, the top and the bottom of glass pipe (4) all overlap and are equipped with solid fixed ring (44), the one side that lies in two solid fixed ring (44) and be close to each other on glass pipe (4) all is equipped with spacing boss (43), the below that lies in workstation (2) in detection cabinet (1) is equipped with oxygen cylinder (5) and nitrogen cylinder (51), be equipped with two governing valves (6) in detecting cabinet (1), oxygen cylinder (5) and nitrogen cylinder (51) communicate with governing valve (6) respectively, the output and gas transmission hole (32) the intercommunication of governing valve (6).

2. The high temperature oxygen index tester of claim 1, wherein: be equipped with a plurality of stands (35) on base (3), circumference evenly distributed of stand (35) at glass pipe (4), a plurality of the top of stand (35) is connected with a apron (36) jointly, and is a plurality of the equal coaxial fixedly connected with diameter in top of stand (35) is less than screw thread post (351) of stand (35), through-hole (361) have all been seted up on apron (36) and the corresponding position of screw thread post (351), through-hole (361) diameter and screw thread post (351) phase-match, the top threaded connection that screw thread post (351) are located apron (36) has gland nut (352), air vent (362) have been seted up to apron (36) central authorities, air vent (362) and glass pipe (4) are coaxial and the diameter that the diameter is less than glass pipe (4).

3. The high temperature oxygen index tester of claim 2, wherein: detect cabinet (1) internal setting and be equipped with mixed cauldron (7), two input tubes (71) of fixedly connected with on mixed cauldron (7), two input tubes (71) communicate with the output of two governing valves (6) respectively, the output and the gas transmission hole (32) intercommunication of mixed cauldron (7), fixedly connected with driving motor (72) on mixed cauldron (7) lateral wall, the motor shaft of driving motor (72) penetrate mix cauldron (7) in and with mix cauldron (7) lateral wall rotation and be connected, fixedly connected with blade (721) on the motor shaft of driving motor (72) stretches into the circumference lateral wall of mixed cauldron (7) one end.

4. The high temperature oxygen index tester of claim 3, wherein: and a heating device (73) is fixedly connected in the mixing kettle (7).

5. The high-temperature oxygen index tester according to claim 4, wherein an air filter (363) is fixedly connected to the upper part of the cover plate (36).

6. The high temperature oxygen index tester of claim 5, wherein: an oxygen content detection device is arranged in the detection cabinet (1), and a detection head of the oxygen content detection device is positioned on the inner side of the gas transmission hole (32).

7. The high temperature oxygen index tester of claim 1, wherein: the detection cabinet (1) is positioned below the workbench (2) and is connected with a gas cylinder bracket (9) in a sliding manner.

8. The high temperature oxygen index tester of claim 7, wherein: and a stabilizing frame (91) is fixedly connected to the gas cylinder bracket (9).

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