CN210071712U

CN210071712U - Automatic oxygen index detector

Info

Publication number: CN210071712U
Application number: CN201920794653.XU
Authority: CN
Inventors: 李攀; 张利峰
Original assignee: Northern Alliance Technology Co Ltd
Current assignee: Northern Alliance Technology Co Ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2020-02-14
Anticipated expiration: 2029-05-30

Abstract

The utility model relates to a flame retardant material tests technical field, in particular to automatic oxygen index detector. Automatic oxygen index detector includes quick-witted case internally mounted's PLC controller, and the PLC controller is connected its characterized in that with the display screen that sets up on the quick-witted case: the PLC is connected with a gas distribution pipeline system inside the case, the gas distribution pipeline is connected with the combustion device, one end of the ignition device is installed in the case, and the other end of the ignition device is arranged in the combustion device. The existing oxygen index detector mostly has the defects of inaccurate test data, short service life, inconvenient operation and low automation degree, and the utility model discloses the automatic oxygen index detector provides an automatic oxygen index detector with high detection precision, convenient use and high automation degree.

Description

Automatic oxygen index detector

Technical Field

The utility model relates to a flame retardant material tests technical field, in particular to automatic oxygen index detector.

Background

The method which is generally adopted by various countries in the world at present and is suitable for detecting the combustion performance of plastics, rubber, fibers, foamed plastics and various solid materials is an oxygen index method. The principle is that a large amount of oxygen is consumed during combustion of substances, the amount of oxygen consumed during combustion of different materials is different, and the oxygen index value of the material is determined by measuring the minimum oxygen consumption during the combustion process of the material, so that the combustion performance of various materials is evaluated. The oxygen index detector is used for measuring the limit oxygen concentration of the material under the ignitable condition, and is widely applied to the test of the combustion performance of the material in the industries of building materials, textiles, plastics and the like.

Most of the existing domestic oxygen index detectors have the defects of inaccurate test data, short service life, inconvenient operation and low automation degree, the whole test is completed by manually adjusting an oxygen concentration value and a total flow value in the test process, the problems of inaccurate adjustment, long time consumption for repeated adjustment, increased labor intensity of testers, manual and handheld ignition of samples during the test and the like are inevitably caused.

Disclosure of Invention

Utility model purpose:

in order to solve the technical problem, the utility model provides a detect automatic oxygen index detector that precision is high, convenient to use, degree of automation are high.

The technical scheme is as follows:

automatic oxygen index detector, including quick-witted case internally mounted's PLC controller, the PLC controller is connected its characterized in that with the display screen that sets up on the quick-witted case: the PLC is connected with a gas distribution pipeline system inside the case, the gas distribution pipeline is connected with the combustion device, one end of the ignition device is installed in the case, and the other end of the ignition device is arranged in the combustion device.

Furthermore, a gas distribution pipeline system is arranged inside the case and comprises a nitrogen pipeline, an oxygen pipeline and a fuel gas inlet pipeline, and a nitrogen gas inlet of the gas distribution pipeline system is sequentially connected with an electromagnetic valve, a filter, a pressure regulating valve, a flow controller, a one-way valve and a mixing tank; the oxygen inlet is sequentially connected with the electromagnetic valve, the filter, the pressure regulating valve, the flow controller, the one-way valve and the mixing tank, and nitrogen and oxygen are mixed in the mixing tank; the pressure gauge is connected with the pressure regulating valve through a pipeline, and the mixing tank is connected with the base through a mixing pipeline.

Furthermore, an oxygen concentration sensor is connected in parallel to the mixing pipeline.

Furthermore, a gas inlet of the gas distribution pipeline system is sequentially connected with an electromagnetic valve and a gas inlet end of a needle valve, and a gas outlet end of the needle valve is connected with the combustor.

Furthermore, a sample clamp is fixed on a base of the combustion device, the base is also provided with a glass cover capable of covering the sample clamp, a through hole for exhausting redundant gas is arranged above the glass cover, and an ignition needle of the ignition device is inserted into the glass cover through the through hole.

Further, ignition's elevating system fixes at quick-witted incasement, and limit switch sets up in elevating system's side, and the elevating system front end is fixed with the support, and the side runs through there is hollow position sleeve about the support, and the support passes through screw fixed connection with position sleeve, and the combustor is passed through to position sleeve inside, through set screw fixed burner, and the combustor front end is fixed with the ignition needle.

Further, elevating system's step motor passes through set screw and is fixed in the base platform, and the step motor front end is connected with shaft coupling one end, and the other end of shaft coupling is connected with ball screw, and ball screw and step motor pass through the coupling joint, and the ball screw both ends are passed through antifriction bearing and are realized the rotation in a circumferential direction on the base platform, are equipped with slide bracket on the ball screw, and the slide bracket both ends cover is on the guide optical axis, through the rotatory linear reciprocating motion that drives slide bracket of step motor.

Furthermore, the lower end face of the fixed plate above the base table is provided with a shock-proof device which is sleeved on the guide optical axis.

Furthermore, the lower end face of the fixing plate is fixed with the hard fixing seat, a soft rubber strip is arranged between the hard fixing seat and the guide optical axis, and a gasket is arranged between the soft rubber strip and the outer turning hook of the hard fixing seat.

The advantages and effects are as follows:

the utility model has the main advantages of setting for oxygen concentration that can make things convenient for the accuracy to according to the oxygen concentration that the setting value procedure can automatic accurate ratio out accord with under the flow requirement.

The utility model discloses still have long-range automatic ignition and combustor automatic lifting mechanism, can realize the combustor through the automation procedure of setting for well to the ignition test process of sample, get rid of the interference when artificially participating in the ignition test.

The utility model has the advantages of it is automatic, intelligent, detect that the precision is high, convenient to use.

Drawings

FIG. 1 is a schematic view of the automatic oxygen index detector of the present invention;

FIG. 2 is a schematic structural diagram of the gas distribution pipeline system of the present invention;

FIG. 3 is a schematic structural view of the ignition device of the present invention;

FIG. 4 is a right side view of the lift mechanism;

FIG. 5 is a schematic view of the mechanism of the fixing plate and the shock absorber at the upper end.

Description of reference numerals:

1. the device comprises a case, 2, a display screen, 3, a gas distribution pipeline system, 4, an ignition device, 5, a mixing tank, 6, an oxygen concentration sensor, 7, an electromagnetic valve, 8, a flow controller, 9, a filter, 10, a pressure gauge, 11, a pressure regulating valve, 12, a needle valve, 13, a one-way valve, 14, a glass cover, 15, a sample clamp, 16, a base, 17, a lifting mechanism, 18, a support, 19, a positioning screw, 20, a burner, 21, an ignition needle, 22, a limit switch, 23, a screw, 24, a positioning sleeve, 25, a fixing screw, 26, a stepping motor, 27, a set screw, 28, a coupler, 29, a rolling bearing, 30, a sliding platform, 31, a guide optical axis, 32, a ball screw rod, 33, a base platform, 34, a fixing plate, 35, a soft rubber strip, 36, a hard fixing seat and 37 a gasket.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The utility model discloses according to the test principle of national standard GB/T2406.2-2009 "oxygen index method survey burning action for plastics": a sample with a specified size is vertically supported in a transparent combustion cylinder with a specified size, mixed gas of oxygen and nitrogen with a certain concentration flowing from bottom to top at a specified flow rate is contained in the transparent combustion cylinder, an igniter is used for igniting the upper end of the sample, timing is started when the sample is combusted, the combustion condition of the sample is observed, the combustion time and the combustion length are recorded when the flame is extinguished, and the experimental result is determined by comparing the value with the value specified in the national standard.

The utility model discloses automatic oxygen index detector extensively is applicable to the oxygen index test of fabrics, plastics, rubber, fibre, timber, insulation material etc. and goods thereof.

As shown in fig. 1 and 2, the automatic oxygen index detector comprises a PLC controller installed inside a case 1, the PLC controller is connected with a display screen 2 arranged on the case 1, the PLC controller is connected with a gas distribution pipeline system inside the case 1, the gas distribution pipeline is connected with a combustion device, one end of an ignition device 4 is installed in the case 1, and the other end of the ignition device 4 is arranged in the combustion device.

The PLC controller and the display screen 2 are prior art, and may be selected from existing devices, for example, the PLC controller may be selected from a DVP-14SS211T2 PLC controller of a desktop, and the display screen 2 may be selected from a kunlun normal TPC-7062TI touch screen display screen, where the description mainly exemplifies that the PLC controller and the display screen 2 are prior art, and should not be taken as a limitation to the contents of the present invention.

The PLC controller is respectively connected with the electromagnetic valve, the pressure regulating valve, the flow controller, the oxygen concentration sensor, the lifting mechanism, the ignition needle and the like through leads; the oxygen index monitor is controlled by a PLC controller, and the PLC controller is connected with the display screen 2. The PLC controller is fixed in the case 1 and close to the display screen 2.

As shown in fig. 1, the case 1 is a cubic structure, a combustion device is fixed on the right side, and it can be seen from fig. 2 that the mixing tank 5 is connected with the combustion device through a mixing pipeline, and the mixing pipeline penetrates out from the rear side of the case 1 and is connected with the base 16 of the ignition device 4; the bottom end of the base 16 has a vent tube that communicates with the interior of the glass envelope 14.

As shown in fig. 2, the gas distribution pipeline system 3 is installed inside the chassis 1, and includes a nitrogen pipeline, an oxygen pipeline and a gas inlet pipeline, and the nitrogen inlet of the gas distribution pipeline system 3 is sequentially connected with the electromagnetic valve 7, the filter 9, the pressure regulating valve 11, the flow controller 8, the check valve 13 and the mixing tank 5; the oxygen inlet is sequentially connected with the electromagnetic valve 7, the filter 9, the pressure regulating valve 11, the flow controller 8, the one-way valve 13 and the mixing tank 5, and nitrogen and oxygen are mixed in the mixing tank 5; the pressure gauge 10 is connected with the pressure regulating valve 11 through a pipeline, and the mixing tank 5 is connected with the base 16 through a mixing pipeline.

The mixing pipeline is connected with the oxygen concentration sensor 6 in parallel, a parallel branch is branched from the mixing pipeline coming out of the mixing tank and used for a branch pipe for oxygen concentration, the oxygen concentration sensor is not directly connected in series on the mixing pipeline, and the requirement on the flow size of flowing is met when the oxygen concentration sensor is used for measurement, so that the oxygen concentration sensor is not too large or too small. The check valve is connected in series behind the oxygen concentration sensor 6 of the parallel branch, and prevents the gas flow from reversing.

As shown in fig. 2, the gas inlet of the gas distribution piping system 3 is connected to the solenoid valve 7 and the inlet end of the needle valve 12 in sequence, and the outlet end of the needle valve 12 is connected to the burner 20.

As shown in fig. 2, the outlet end of the needle valve 12 is connected to the left port of the burner 20, the fuel gas exits from the left outlet of the burner 20 through the hollow pipeline of the burner 20 and contacts with the ignition needle 21 on the left outlet, and the lead wire at the rear end of the ignition needle 21 is connected to the ignition transformer; the ignition transformer is connected with the PLC controller.

A sample clamp 15 is fixed on a base 16 of the combustion device, the base 16 is also provided with a glass cover 14 capable of covering the sample clamp 15, a through hole for exhausting redundant gas is arranged above the glass cover 14, and an ignition needle 21 of the ignition device 4 is inserted into the glass cover 14 through the through hole. The outlet end of the burner 20 is provided with an ignition pin 21 for igniting the sample.

As shown in fig. 2, the bottom end of the base 16 is fixed on the platform at the right side of the chassis 1 through bolts, so that the floor area of the whole device is reduced, and the installation is simple and easy to disassemble. A sample clamp column is arranged in the center of the base 16, a sample clamp 15 is fixed above the sample clamp column, and the sample clamp 15 can be two fireproof sample clamping pieces which are screwed down through bolts at the lower ends, so that a sample can be fixed on the sample clamp 15. Meanwhile, a columnar sample clamp is also shown in the figure, and a sample can be fixed through the columnar sample clamp, wherein the columnar sample clamp is an existing sample clamp.

The lifting mechanism 17 of the ignition device 4 is fixed in the case 1, the limit switch 22 is arranged on the side surface of the lifting mechanism 17, the support 18 is fixed at the front end of the lifting mechanism 17, the hollow positioning sleeve 24 penetrates through the left side surface and the right side surface of the support 18, the support 18 is fixedly connected with the positioning sleeve 24 through the screw 23, the combustor 20 penetrates through the inside of the positioning sleeve 24, the combustor 20 is fixed through the positioning screw 19, and the ignition needle 21 is fixed at the front end of the combustor 20.

As shown in fig. 3 and 4, the lifting mechanism 17 is fixed to the right side surface of the cabinet 1, and a through groove is provided above the right side surface of the cabinet 1, so that the ignition device 4 can move up and down. The projecting distance and position of the ignition needle 21 can be adjusted by the set screw 19.

As shown in fig. 3 and 4, the stepping motor 26 of the lifting mechanism 17 is fixed to the base table 33 by a fixing screw 25, the front end of the stepping motor 26 is connected to one end of a coupling 28, the other end of the coupling 28 is connected to a ball screw 32, the coupling 28 is fixed to the stepping motor 26 by a set screw 27, the ball screw (32) is connected to the stepping motor (26) by the coupling (28), and the coupling 28 connects the ball screw 32 to the shaft of the stepping motor 26, thereby playing a role in transmitting torque and rotating; the coupler 28 and the stepping motor 26 are fixed through a set screw 27, circumferential rotation is achieved on two ends of a ball screw 32 and a base table 33 through a rolling bearing 29, a sliding platform 30 is arranged on the ball screw 32, guide optical shafts 31 are sleeved at two ends of the sliding platform 30, and the sliding platform 30 is driven to linearly reciprocate through rotation of the stepping motor 26.

Base platform 33 includes the posterior lateral plate, upper and lower fixed plate, posterior lateral plate side is equipped with the slide, limit switch 22 passes through slide and base platform 33 sliding connection, generally after setting up spacing distance, it is fixed with two upper and lower limit switch 22, make sliding platform 30 remove in the distance that limit switch set up, limit switch 22 is used for the upper and lower limit of ignition needle 21 spacing, if limit switch 22 goes wrong unable limit effect that realizes, be equipped with the shock mounting on fixed plate 34 and direction optical axis 31 this moment, mainly prevent sliding platform 30 and fixed plate 34 striking, lead to ignition 4 vibrations, can cause the accident of ignition needle 21 to drop, perhaps the combustor 20 left side drops with the gas pipeline, prevent to cause major fire accident. Therefore, the installation of the shock-proof device is very necessary.

The stepping motor 26 is fixed on the bottom surface of a fixing plate 34 at the lower end of the base table 33, the stepping motor 26 is connected with the lower end of the ball screw 32 through a coupling 28, and the upper end of the ball screw 32 is connected with the fixing plate 34 at the upper end of the base table 33 through a rolling bearing 29, so that circumferential rotation of the ball screw is realized. Two guide optical axes 31 parallel to and equidistant from the ball screw 32 are further provided on the front and rear sides of the ball screw 32, and a shock-proof device is provided between the guide optical axes 31 and the base 33, so that a ball nut connected to the ball screw 32 is provided in the middle of the sliding platform 30.

The lower end face of the fixed plate 34 above the base table 33 is provided with a shock-proof device which is sleeved on the guide optical axis 31.

As shown in fig. 5, the shock-proof device comprises a hard fixed seat 36, a soft rubber strip 35 and a gasket 37; stereoplasm fixing base 36 can be hard materials such as plastics, stereoplasm fixing base 36 is the tube-shape, one end is equipped with the fixing base fixed with fixed plate 34, the outside fixed hook that buckles out of the other end, the fixed hook size will be a bit more than the L shape fixed slot in the soft adhesive tape 35, simultaneously in order to make stereoplasm fixing base 36, soft adhesive tape 35 is fixed inseparabler, installation packing ring 37 in L shape fixed slot, the packing ring 37 material is mostly rubber, further with stereoplasm fixing base 36, soft adhesive tape 35 is fixed, soft adhesive tape 35's effect is when taking place slide platform 30 and surpass limit switch 22, play certain cushioning effect. Soft adhesive tape 35 wraps up matter fixing base 36 inboard, makes and fixes inseparabler between direction optical axis 31 and the stereoplasm fixing base 36, and the fixed hook is lived in the outside parcel, fixes soft adhesive tape 35.

As shown in fig. 5, the lower end surface of the fixing plate 34 is fixed to the hard fixing seat 36 by a common screw, a soft rubber strip 35 is disposed between the hard fixing seat 36 and the guiding optical axis 31, and a gasket 37 is disposed between the soft rubber strip 35 and the outer turning hook of the hard fixing seat 36.

The automatic oxygen index detector comprises a case 1, a display screen 2 is arranged on a panel of the case 1, a gas distribution pipeline system 3 is arranged in the case 1 and respectively consists of one path of nitrogen, one path of oxygen and one path of gas, wherein the inlet end of the one path of nitrogen is sequentially connected with an electromagnetic valve 7 for switching on and off a gas path, a filter 9 capable of filtering moisture impurities of gas, a pressure regulating valve 11 for regulating the gas pressure to the required gas distribution pressure, a flow controller 8 for stabilizing the gas flow, a one-way valve 13 for ensuring that the gas can only flow towards the downstream, finally the gas enters a mixing tank 5 to be mixed with the oxygen, a pressure gauge 10 for displaying the gas pressure is connected to the pressure regulating valve 11 through a pipeline, the other path of oxygen enters the mixing tank 5 to be mixed with the nitrogen through the same implementation connection mode as the nitrogen path, a mixing pipeline is connected between a mixing tank 5 and a base 16, an oxygen concentration sensor 6 is connected in parallel on the mixing pipeline and is used for monitoring the oxygen concentration of oxygen-nitrogen mixed gas coming out of the mixing tank 5, a glass cover 14 and a sample clamp 15 are placed on the base 16 and are used for clamping a sample firmly at a test position, the glass cover 14 isolates the sample from the external space, meanwhile, the required flow rate of the mixed gas is formed in the glass cover 14 and flows through the sample, the rest path of gas inlet end is sequentially connected with an electromagnetic valve 7 and a needle valve 12, the gas outlet end of the needle valve 12 is connected with the gas inlet end of a combustor 20, an ignition device 4 is installed in a case 1, the ignition device 4 comprises a combustor 20, a lifting mechanism 17 for driving the combustor 20 to move up and down, a support 18 for fixing the combustor 20, a positioning screw 19 for adjusting the position of the combustor 20, and a limit switch 22 for limiting the up and down movement limit, an ignition needle 21 for remotely igniting gas is bound at the air outlet end of the burner 20.

The utility model discloses convenient accurate settlement oxygen concentration to according to the oxygen concentration that the setting value procedure can automatic accurate ratio go out to accord with under the flow requirement, thereby be used for solving the popular mode method that changes concentration through the manual regulation flow of experimenter on the market at present, its difficulty of this kind of mode of relying on the manual regulation of experimenter lies in that it needs to adjust the flow repeatedly to reach the requirement, its process is loaded down with trivial details, and the regulation precision is low, the undulant shortcoming such as big of flow.

Claims

1. Automatic oxygen index detector, including quick-witted case (1) internally mounted's PLC controller, the PLC controller is connected its characterized in that with display screen (2) of setting on quick-witted case (1): the PLC is connected with a gas distribution pipeline system (3) in the case (1), the gas distribution pipeline is connected with a combustion device, one end of an ignition device (4) is installed in the case (1), and the other end of the ignition device (4) is arranged in the combustion device.

2. The automated oxygen index detector of claim 1, wherein: the gas distribution pipeline system (3) is installed inside the case (1), the gas distribution pipeline system (3) comprises a nitrogen pipeline, an oxygen pipeline and a fuel gas inlet pipeline, and a nitrogen gas inlet of the gas distribution pipeline system (3) is sequentially connected with an electromagnetic valve (7), a filter (9), a pressure regulating valve (11), a flow controller (8), a one-way valve (13) and a mixing tank (5);

the oxygen inlet is sequentially connected with the electromagnetic valve (7), the filter (9), the pressure regulating valve (11), the flow controller (8), the one-way valve (13) and the mixing tank (5), and nitrogen and oxygen are mixed in the mixing tank (5);

the pressure gauge (10) is connected with the pressure regulating valve (11) through a pipeline, and the mixing tank (5) is connected with the base (16) through a mixing pipeline.

3. The automated oxygen index detector of claim 2, wherein: and an oxygen concentration sensor (6) is connected in parallel to the mixing pipeline.

4. The automated oxygen index detector of claim 2, wherein: a gas inlet of the gas distribution pipeline system (3) is sequentially connected with an electromagnetic valve (7) and a gas inlet end of a needle valve (12), and a gas outlet end of the needle valve (12) is connected with a combustor (20).

5. The automated oxygen index detector of claim 1, wherein: a sample clamp (15) is fixed on a base (16) of the combustion device, a glass cover (14) capable of covering the sample clamp (15) is further arranged on the base (16), a through hole for exhausting redundant gas is formed above the glass cover (14), and an ignition needle (21) of the ignition device (4) is inserted into the glass cover (14) through the through hole.

6. The automated oxygen index detector of claim 1, wherein: elevating system (17) of ignition (4) are fixed in quick-witted case (1), limit switch (22) set up the side at elevating system (17), elevating system (17) front end be fixed with support (18), the side runs through hollow positioning sleeve (24) about support (18), support (18) pass through screw (23) fixed connection with positioning sleeve (24), combustor (20) are passed through to positioning sleeve (24) inside, through positioning screw (19) fixed combustor (20), combustor (20) front end is fixed with ignition needle (21).

7. The automated oxygen index detector of claim 6, wherein: step motor (26) of elevating system (17) is fixed in base platform (33) through set screw (25), step motor (26) front end is connected with shaft coupling (28) one end, the other end of shaft coupling (28) is connected with ball screw (32), ball screw (32) and step motor (26) pass through shaft coupling (28) and connect, realize the circumference rotation on ball screw (32) both ends are passed through antifriction bearing (29) and base platform (33), be equipped with on ball screw (32) and have sliding platform (30), sliding platform (30) both ends cover is on direction optical axis (31), through step motor (26) rotatory drive sliding platform (30) straight reciprocating motion.

8. The automated oxygen index detector of claim 7, wherein: the lower end face of a fixed plate (34) above the base table (33) is provided with a shock-proof device which is sleeved on the guide optical axis (31).

9. The automated oxygen index detector of claim 8, wherein: the lower end face of the fixing plate (34) is fixed with the hard fixing seat (36), a soft rubber strip (35) is arranged between the hard fixing seat (36) and the guide optical axis (31), and a gasket (37) is arranged between the soft rubber strip (35) and the outer turning hook of the hard fixing seat (36).