CN210269754U

CN210269754U - Oxygen index tester

Info

Publication number: CN210269754U
Application number: CN201921129000.6U
Authority: CN
Inventors: 张欢
Original assignee: Xi'an Shengkun Construction Engineering Testing Co Ltd
Current assignee: Xi'an Shengkun Construction Engineering Testing Co Ltd
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2020-04-07
Anticipated expiration: 2029-07-17

Abstract

The utility model relates to an oxygen index apparatus in burning test equipment field, aim at solving the inconvenient problem of operation, it includes the box, be equipped with oxygen import and nitrogen gas import with oxygen jar and nitrogen gas jar intercommunication respectively on the box lateral wall, be equipped with the gas mixture pipe on the lateral wall of box, the gas mixture pipe intercommunication has the combustion cylinder, be equipped with the clamping device who stretches out the combustion cylinder in the combustion cylinder, be equipped with the glass cover on the combustion cylinder, box one side is equipped with control panel, control panel's upper end is equipped with the axis of rotation, be equipped with the support that supplies the axis of rotation to pass on the box, the axis of rotation is connected with the rotate bracket, axis of rotation both ends threaded connection has the locking knob, be equipped with the dog that. The utility model discloses there is the function of control panel angularly adjustable, the effect of convenient experimenter operation.

Description

Oxygen index tester

Technical Field

The utility model belongs to the technical field of combustion test equipment's technique and specifically relates to an oxygen index apparatus is related to.

Background

The oxygen index is the minimum oxygen concentration required for the material to undergo flaming combustion in a stream of oxygen-nitrogen mixture under specified conditions. A high oxygen index indicates that the material is not readily combustible, a low oxygen index indicates that the material is readily combustible, and the completion of the measurement of the oxygen index of the material requires an oxygen and nitrogen mixing and flow regulating device, and equipment for combusting the material sample.

The prior Chinese patent with publication number CN203551537U discloses a critical oxygen index tester provided with a gas mixing cylinder, which comprises a box body, wherein an oxygen channel, a nitrogen channel and a controller are arranged in the box body, and the oxygen channel and the nitrogen channel are connected with the controller; the controller is connected with a human-computer interface arranged on the side face of the box body, and a first ball valve, a first pressure reducing valve, a first pressure gauge, a first gas flowmeter and a first one-way valve are sequentially arranged between an outlet and an inlet of the oxygen channel; a second ball valve, a second pressure reducing valve, a second pressure gauge, a second gas flowmeter and a second one-way valve are sequentially arranged between the outlet and the inlet of the nitrogen channel; the outlets of the oxygen channel and the nitrogen channel are connected with the inlet of the gas mixing cylinder, and the outlet of the gas mixing cylinder is connected with the combustion cylinder.

The oxygen index tester is placed on a workbench, oxygen and nitrogen interfaces on the tester are respectively connected with an oxygen tank and a nitrogen tank, a power supply is started, the pressure of oxygen and nitrogen is adjusted, the initial oxygen concentration is set on a human-computer interface, the combustion cylinder is ensured to be in a vertical state, a sample is vertically installed at the central position of the combustion cylinder, the top end of the sample is lower than the top opening of the combustion cylinder by at least 100mm, meanwhile, the exposed part of the lowest point of the sample is higher than the top surface of a gas dispersion device of a combustion cylinder base by 100mm, the oxygen and the nitrogen flow into a mixing chamber, and the sample is ignited and tested.

The above prior art solutions have the following drawbacks: during testing, an experimenter usually keeps a standing posture for testing operation in order to operate conveniently, the operation of sampling, replacing a sample and igniting the sample is very convenient when standing, but a human-computer interface is usually arranged on the side surface of a box body and is in a vertical state, and when the gas pressure and the oxygen concentration are adjusted through the human-computer interface, the human-computer interface can be accurately observed and operated only by bending down or squatting down, so that the labor capacity of the experimenter is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an oxygen index survey with, it has the function of control panel angularly adjustable.

The utility model aims at realizing through the following technical scheme:

the utility model provides an oxygen index apparatus, includes the box, be equipped with on the box lateral wall respectively with oxygen import and nitrogen gas import of oxygen jar and nitrogen gas jar intercommunication, be equipped with the mist pipe on the lateral wall of box, the mist pipe intercommunication has the combustion barrel, be equipped with the clamping device who stretches out the combustion barrel in the combustion barrel, be equipped with the glass cover on the combustion barrel, box one side is equipped with control panel, control panel's upper end is equipped with the axis of rotation, be equipped with the support that supplies the axis of rotation to pass on the box, the axis of rotation is connected with rotate bracket, axis of rotation both ends threaded connection has the locking knob, be equipped with the dog that deviates from one side butt of locking knob with the support in the.

Through adopting above-mentioned technical scheme, the axis of rotation rotates round the support, drives control panel and changes the angle, makes the control panel of vertical direction originally can rotate to the contained angle different with the horizontal direction, makes people need not squat down or bow just can accomplish data record and regulation operation on the control panel, makes the more convenient completion experiment operation of experimenter, improves experimental efficiency. The locking knobs at the two ends of the rotating shaft rotate towards the direction of the support, the distance between the locking knobs and the stop blocks is reduced, so that the rotating shaft is locked and fixed, the angle of the control panel is fixed, the locking knobs rotate towards the direction deviating from the support, the distance between the locking knobs and the stop blocks is enlarged, the angle of the control panel can be adjusted at the moment, and the convenience in operation is improved.

The utility model discloses further set up to: one side that control panel deviates from the display screen is equipped with the protection casing, be equipped with the recess that holds the protection casing on the box, one side that the protection casing is close to the axis of rotation is equipped with the compensation groove that supplies the circuit to pass.

Through adopting above-mentioned technical scheme, the protection casing at the control panel back protects the back of each instrument, prevent its a lot of and the direct butt of box lateral wall, cause the damage of instrument, the compensation groove of protection casing and axis of rotation one side supplies the circuit of instrument to pass by the compensation groove and communicate with the box is inside simultaneously, reduce the naked part of circuit, the business turn over box repeatedly of reducing the circuit simultaneously, guarantee the connection stability of circuit and the life-span of extension circuit, improve equipment operation's stability.

The utility model discloses further set up to: one side of the box body is provided with a storage basket, and an embedding groove for embedding the combustion cylinder and the glass cover is arranged in the storage basket.

Through adopting above-mentioned technical scheme, when not doing the experiment, the storing basket avoids placing the condition that arouses losing or damaging on the operation panel with glass cover and a combustion section of thick bamboo splendid attire, and the caulking groove in the storing basket further stabilizes the position of glass cover and a combustion section of thick bamboo in the storing basket, improves the stability that glass cover and a combustion section of thick bamboo were deposited.

The utility model discloses further set up to: the glass cover upper end is equipped with the opening, the opening is less than the internal diameter of glass cover, the glass cover upper end cover is equipped with the filter screen panel.

Through adopting above-mentioned technical scheme, the opening of glass cover upper end supplies gas and smog and unnecessary oxygen and nitrogen gas after the burning to discharge, and these matters are at first discharging through the filter screen panel, and the filter screen panel can absorb the solid matter and partial gas that the burning produced, prevents to smoke the operation panel black.

The utility model discloses further set up to: the drying agent storage box is characterized in that a storage box which is used for containing a drying agent and is attached to the inner wall of the combustion cylinder is arranged in the combustion cylinder, a box cover which is in threaded connection is arranged on the storage box, and through holes which are uniformly distributed are formed in the bottom wall of the storage box and the box cover.

Through adopting above-mentioned technical scheme, the drier in the storage box will be used from getting into the combustion chamber after the oxygen and the nitrogen gas of mixing gas pipe are dry, prevents that the moisture in the gas from influencing the burning of material, and then reduces experimental error, improves the precision of experimental data. The drying agent in the storage box is convenient to replace by the box cover in threaded connection.

The utility model discloses further set up to: the roof of storing the box is equipped with the collecting vat, the external diameter of collecting vat is less than the internal diameter of a combustion section of thick bamboo, the lateral wall of collecting vat is equipped with evenly distributed's venthole, collecting vat opening border is equipped with the ring platform with combustion section of thick bamboo inner wall butt, it is connected with the pull ring to rotate on the ring platform.

By adopting the technical scheme, ash generated by combustion can be collected on the collecting tank, and the annular table attached to the side wall of the combustion cylinder prevents dust from falling to the bottom wall of the combustion cylinder to cause difficulty in cleaning or cause blockage of the mixed gas pipe; the efficiency of experiment can be guaranteed, sets up in the venthole of collecting vat lateral wall simultaneously, does not hinder the circulation of mist, and ashes are difficult for depositing in the lateral wall moreover, and the venthole is difficult for blockking up, reduces the time of clearing up the venthole, guarantees the stability of equipment operation, improves efficiency of software testing. The pull ring is convenient for taking out the collecting groove from the combustion cylinder.

The utility model discloses further set up to: the upper surface of the ring platform is inclined downwards from the inner wall of the combustion cylinder to the collecting tank.

Through adopting above-mentioned technical scheme, the ring platform outer lane is higher than the inner circle, makes the surface of ring platform form the inclined plane, is favorable to ashes to get into the collecting vat along the ring platform, does not stop on the ring platform, and ashes are difficult to spill from the ring platform when taking out collecting vat and ring platform, avoids the secondary clearance, improves the efficiency of clearance ashes.

The utility model discloses further set up to: one side of the bottom wall of the collecting groove, which faces the storage box, is provided with a convex block which is abutted against the box cover.

Through adopting above-mentioned technical scheme, the lug has reduced the area of contact of collecting vat with the storage box, reduces the collecting vat to the resistance of gas circulation, guarantees that gas flows at a combustion section of thick bamboo, reduces the error of experiment, improves the degree of accuracy of test.

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

1. the angle of the control panel is adjustable, so that people can finish the operation of the control panel without squatting or bending down;

2. the storage basket can store the combustion cylinder and the glass cover, so that the combustion cylinder and the glass cover are prevented from being lost or damaged;

3. the filter screen of the glass cover can absorb substances generated by combustion while not obstructing the gas circulation, thereby preventing the operation table from being blackened;

4. the storage box is provided with the drying agent, so that the gas is dried, and the experimental error is reduced;

5. the collecting tank can collect the generated materials by the mixed gas.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic diagram of the front structure of the box body of the present invention.

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

Fig. 4 is a schematic view of the protective cover structure of the present invention.

Fig. 5 is a schematic structural view of the combustion cylinder of the present invention.

Description of the drawings: 1. a box body; 11. an oxygen inlet; 12. a nitrogen inlet; 13. a mixed gas pipe; 14. a storage basket; 141. caulking grooves; 2. a combustion can; 21. a glass cover; 211. an opening; 212. a filtering net cover; 22. a storage box; 221. a box cover; 222. a through hole; 23. collecting tank; 231. a ring platform; 232. a pull ring; 233. a bump; 234. an air outlet; 24. a clamping device; 3. a control panel; 31. a rotating shaft; 32. a support; 33. locking the knob; 331. a stopper; 34. a protective cover; 35. a compensation groove; 36. a groove; 4. a pressure gauge; 41. a flow regulating valve; 42. a display screen; 43. a flow meter.

Detailed Description

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

Referring to fig. 1, for the utility model discloses an oxygen index tester, including box 1, install oxygen inlet 11 and nitrogen inlet 12 connected with an oxygen jar and a nitrogen jar respectively on the box 1 lateral wall, be equipped with oxygen pipe and nitrogen pipe with oxygen inlet 11 and nitrogen inlet 12 intercommunication respectively in the box 1, install the gas mixing tube with oxygen pipe and nitrogen pipe intercommunication in the box 1, be equipped with the oxygen concentration tester who is connected with the gas mixing tube on the box 1, be equipped with the mixed gas pipe 13 that wears out box 1 on the gas mixing tube; be equipped with control panel 3 on the box 1, control panel 3 is last to install two manometer 4, two flow control table valves, a display screen 42 and a flowmeter 43, two manometer 4 respectively with oxygen hose and nitrogen gas pipe intercommunication, two flow control valve 41 respectively with oxygen hose and nitrogen gas pipe intercommunication, display screen 42 is connected with the oxygen concentration tester electricity, flowmeter 43 and gas mixture pipe 13 intercommunication, the one end that gas mixture pipe 13 kept away from is connected with combustion cylinder 2, be equipped with glass cover 21 on the combustion cylinder 2, the diapire of glass cover 21 and the inside laminating of combustion cylinder 2, 2 lateral walls of combustion cylinder are equipped with the boss of accepting glass cover 21. One side of the box body 1 is provided with a storage basket 14, and the storage basket 14 is provided with an embedding groove 141 embedded with the combustion cylinder 2 and the glass cover 21.

As shown in fig. 2, an opening 211 is formed in the top wall of the glass cover 21, the opening 211 is smaller than the inner diameter of the glass cover 21, a filter mesh enclosure 212 is sleeved on the top wall of the glass cover 21, and an activated carbon adsorption layer is disposed in the filter mesh enclosure 212.

As shown in fig. 2 and 3, the side of the upper end of the control panel 3 is provided with a rotating shaft 31, the box body 1 is integrally provided with a support 32 through which the rotating shaft 31 passes, the support 32 is provided with an opening through which the rotating shaft 31 passes, the rotating shaft 31 is rotatably connected with the support 32, the rotating shaft 31 is rotated, the angle of the control panel 3 can be changed, two ends of the rotating shaft 31 are in threaded connection with locking knobs 33, the rotating shaft 31 is fixedly provided with a stopper 331 abutted against one side of the support 32 departing from the locking knobs 33, the support 32 is located between the stopper 331 and the locking knobs 33, the control panel 3 is further provided with a protective cover 34 on one side departing from the display screen 42, the box body 1 is provided with a groove 36 for accommodating the protective cover 34, see fig. 4, and one side of the protective cover.

As shown in fig. 5, a cylindrical storage box 22 for placing a drying agent is arranged in the combustion cylinder 2, the side wall of the storage box 22 is attached to the inner wall of the combustion cylinder 2 and can slide in the combustion cylinder 2, and a box cover 221 connected by threads is arranged on the top wall of the storage box 22, so that the drying agent is convenient to replace. A cylindrical collecting groove 23 is arranged on the storage box 22, the outer diameter of the collecting groove 23 is smaller than the inner diameter of the combustion cylinder 2, a certain space exists between the side wall of the collecting groove 23 and the side wall of the combustion cylinder 2, air outlet holes 234 which are uniformly distributed are formed in the side wall of the collecting groove 23, and a convex block 233 which is abutted to the box cover 221 is integrally arranged on the bottom wall of the collecting groove 23; the edge of the opening 211 of the collecting tank 23 is provided with a ring table 231 abutted against the inner wall of the combustion cylinder 2, the outer ring of the ring table 231 is higher than the inner ring, the surface of the ring table 231 is inclined downwards from the inner wall of the combustion cylinder 2 to the collecting tank 23 to form an inclined plane, the inclined plane of the ring table 231 is connected with a semicircular pull ring 232, two ends of the pull ring 232 are connected with connecting shafts perpendicular to the respective tangential directions, and the ring table 231 is provided with an opening for rotating the connecting shafts. The top of ring platform 231 is equipped with clamping device 24, and clamping device 24 includes the ring with ring platform 231 butt, and the ring is equipped with the connecting rod along the diameter is square, and the center of connecting rod is equipped with the planar bracing piece in perpendicular to ring place, and the one end that the connecting rod was kept away from to the bracing piece is equipped with the jack and stretches out combustion barrel 2, has plugged in the clip of centre gripping sample in the jack.

The implementation principle of the embodiment is as follows: opening valves of an oxygen tank and a nitrogen pipe, taking down the glass cover 21, taking out the clamping device 24 and the collecting tank 23, overturning the combustion cylinder 2, pouring out the storage box 22, unscrewing the box cover 221, putting in the drying agent, screwing the box cover 221, putting in the combustion cylinder 2, and putting in the collecting tank 23 and the clamping device 24. Clamping the cut sample on a clamp according to experimental requirements, inserting the clamp into a jack, covering a glass cover 21, holding a control panel 3, rotating the control panel 3 until the control panel rotates to a proper observation and adjustment angle, rotating a locking knob 33 towards a support 32, fixing the position of the control panel 3, adjusting a pressure gauge 4 and a flow regulating valve 41 until the oxygen concentration value reaches an estimated value, keeping the total flow constant, taking down a filter screen 212, igniting an igniter, extending an ignition head of the igniter into the glass cover 21 to be in contact with the top end of the sample, taking out the ignition head after igniting the sample to extinguish the igniter, covering the filter screen 212, repeatedly replacing a new sample, carrying out an experiment, adjusting the oxygen concentration until the sample is completely combusted or just combusted by 5CM in 3 minutes, wherein the oxygen concentration at the moment is the oxygen index value, and completing the test. And closing valves of the oxygen tank and the nitrogen tank. Taking down the glass cover 21, removing the filter screen 212, cleaning and putting the glass cover into the caulking groove 141 of the storage basket 14; the holding device 24 is taken out of the combustion cylinder 2, the holding ring 232 is held to take out the collecting groove 23, the ashes therein are poured out, the combustion cylinder 2 is turned upside down to pour out the storage box 22 inside, the box cover 221 is unscrewed, the used drying agent is poured out, and the box cover 221 is screwed down. The storage box 22, the catch tank 23 and the holding device 24 are then sequentially placed into the combustion cylinder 2, and the combustion cylinder 2 is placed with the opening 211 facing upward into the insertion groove 141.

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

1. The utility model provides an oxygen index apparatus, includes box (1), be equipped with on box (1) lateral wall respectively with oxygen inlet (11) and nitrogen gas inlet (12) of oxygen jar and nitrogen gas jar intercommunication, be equipped with mist pipe (13) on the lateral wall of box (1), mist pipe (13) intercommunication has combustion cylinder (2), be equipped with clamping device (24) that stretch out combustion cylinder (2) in combustion cylinder (2), be equipped with glass cover (21) on combustion cylinder (2), box (1) one side is equipped with control panel (3), its characterized in that: the upper end of control panel (3) is equipped with axis of rotation (31), be equipped with support (32) that supply axis of rotation (31) to pass on box (1), axis of rotation (31) are rotated with support (32) and are connected, axis of rotation (31) both ends threaded connection has locking knob (33), be equipped with dog (331) that deviate from one side butt of locking knob (33) with support (32) on axis of rotation (31).

2. An oxygen index measuring instrument according to claim 1, wherein: one side that control panel (3) deviate from display screen (42) is equipped with protection casing (34), be equipped with recess (36) that hold protection casing (34) on box (1), one side that protection casing (34) are close to axis of rotation (31) is equipped with compensation groove (35) that supply the circuit to pass.

3. An oxygen index measuring instrument according to claim 1, wherein: one side of the box body (1) is provided with a storage basket (14), and an embedding groove (141) embedded with the combustion cylinder (2) and the glass cover (21) is arranged in the storage basket (14).

4. An oxygen index measuring instrument according to claim 1, wherein: an opening (211) is formed in the upper end of the glass cover (21), the opening (211) is smaller than the inner diameter of the glass cover (21), and a filter screen cover (212) is sleeved on the upper end of the glass cover (21).

5. An oxygen index measuring instrument according to claim 1, wherein: be equipped with in the combustion cylinder (2) and place desiccant and with storage box (22) of combustion cylinder (2) inner wall laminating, be equipped with threaded connection's lid (221) on the storage box (22), all be equipped with evenly distributed's through-hole (222) on storage box (22) diapire and lid (221).

6. An oxygen index measuring instrument according to claim 5, wherein: be equipped with collecting vat (23) on the roof of storage box (22), the external diameter of collecting vat (23) is less than the internal diameter of a combustion section of thick bamboo (2), the lateral wall of collecting vat (23) is equipped with evenly distributed's venthole (234), collecting vat (23) opening (211) border is equipped with the ring platform (231) with a combustion section of thick bamboo (2) inner wall butt, it is connected with pull ring (232) to rotate on ring platform (231).

7. An oxygen index measuring instrument according to claim 6, wherein: the upper surface of the ring platform (231) is inclined downwards from the inner wall of the combustion cylinder (2) to the collecting tank (23).

8. An oxygen index measuring instrument according to claim 6, wherein: and a convex block (233) which is abutted against the box cover (221) is arranged on one side of the bottom wall of the collecting groove (23) facing the storage box (22).