CN205317702U - Calibrating device of pitch softening point appearance - Google Patents
Calibrating device of pitch softening point appearance Download PDFInfo
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- CN205317702U CN205317702U CN201521081220.8U CN201521081220U CN205317702U CN 205317702 U CN205317702 U CN 205317702U CN 201521081220 U CN201521081220 U CN 201521081220U CN 205317702 U CN205317702 U CN 205317702U
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Abstract
The utility model discloses a calibrating device of pitch softening point appearance, it is lower not enough to the accuracy nature of the examination / calibration of pitch softening point appearance to overcome prior art. The pitch softening point appearance is including treating school temperature sensor and container, and this calibrating device includes: detect and use temperature sensor, with treat that school temperature sensor all sets up in the container, be used for with treat that school temperature sensor carries out temperature data collection separately, trigger device sets up in the container for produce an analysis constantly, analytical equipment, be used for to the analysis constantly respectively by temperature sensor reaches for the detection treat the temperature that school temperature sensor gathered separately and carry out the comparison. The utility model provides a temporal true temperature's of the unable real -time supervision steel ball of prior art contact bottom suspension fagging defect, improved the precision and the accuracy of examination / calibration, reduced the complexity of operating procedure.
Description
Technical field
This utility model relates to asphalt softening point instrument, particularly relates to the calibrating installation of a kind of asphalt softening point instrument.
Background technology
No matter in purposes or quantitatively bituminous paving, in highway road, all occupies extremely important status. Due to the characteristic of asphalt material itself, will producing ruckbildung when asphalt material reaches certain temperature, namely asphalt material deliquescing is further dissolved for liquid state, and this phenomenon will have a strong impact on the serviceability of this material.
Actual engineering bituminous paving, it is possible to there will be and raise, with temperature, the phenomenon that intensity is remarkably decreased with rigidity. In order to ensure that bituminous paving is under high temperature season traffic load repeated action, will not produce such as wave, passage, rut, gather around the diseases such as bag, bituminous paving should have good high-temperature stability.
At present, the high-temperature stability of bituminous paving, generally adopt the method controlling asphalt softening point to be controlled by. Asphalt softening point instrument (being called for short " softening point instrument ") is generally adopted to measure the softening point of the materials such as residue after bi tumenf orr oad, coal tar pitch, liquid petroleum Colophonium and emulsified asphalt evaporation.
Asphalt softening point instrument principle is as follows: in the becket of given size, on put the steel ball of given size and weight, it is put in water or glycerol, with the heating rate of 5 ± 0.5 degrees celsius/minute (DEG C/min), it is the softening point of Colophonium to steel ball temperature when reaching lower supporting plate surface of sinking.
Asphalt softening point instrument is generally made up of several parts such as heater, thermometer (or temperature sensor) and corresponding control systems. Heating devices heat whether uniformly, warming-in-water whether at the uniform velocity, the temperature error of indication of thermometer (or temperature sensor) whether meet requirement, the impact of asphalt softening point numerical value is most important.
But, according to existing vertification regulation, asphalt softening point instrument heating rate calibrating/calibration is that at the 3rd, 8,13 minutes (min), normal thermometer (or temperature sensors of high precision) is put into collection bath temperature in water-bath respectively, with the stopwatch record time, the temperature difference that the temperature that different time gathers obtains draws average heating rate divided by corresponding Time Calculation.Different operators is to reading opportunity of time incomplete same, and measured result is it is possible to exist very big artificial difference. And, operator puts into the difference of thermometer position every time in a water bath, and data acquisition is likely to exists very big-difference therefrom; The heating rate of interval calculation accurately can only illustrate that the meansigma methods of heating rate is accurate, it is impossible to represents the at the uniform velocity state of whole temperature-rise period.
Additionally, asphalt softening point instrument (ring and ball method) adopts the temperature in steel ball contact lower supporting plate moment to be asphalt softening point temperature, the method that each instrument adopts when determining this moment is also different, the method currently mainly adopting range estimation or optoelectronic induction. Visual method personal error is big, and operating process takes time and effort. Some is with the automatic asphalt softening point instrument of photo-electric proximity transducer, and when steel ball sinks close to lower supporting plate surface, photo-electric proximity transducer senses and transmit the control system that signal to instrument carries, by the temperature in this control this moment of system log (SYSLOG). For this automatic asphalt softening point instrument, although whole processing procedure is to be automatically performed, but based on the operation principle of photo-electric proximity transducer so that whole process exists time record and postpones, and because the temperature impact of time delay generation has no way of considering.
Prior art is not owing to having suitable detection means, the actual water bath temperature of lower supporting plate moment cannot be contacted with instrument synchronous detecting steel ball, so it has been generally acknowledged that the temperature that the thermometer that softening point instrument carries accurately then gathers is accurate, heating rate is satisfied simultaneously requires, water-bath is considered at the uniform velocity to heat up.
In sum, prior art cannot truly obtain the actual water bath temperature of steel ball contact lower supporting plate moment and the real-time temperature-rise period of water bath, it is difficult to meets the requirement of the accuracy of the calibrating/calibration of the asphalt softening point moment temperature measurement for asphalt softening point instrument and heating rate.
Utility model content
Technical problem to be solved in the utility model is to overcome prior art for the relatively low deficiency of the accuracy of the calibrating/calibration of asphalt softening point instrument.
This utility model provide firstly the calibrating installation of a kind of asphalt softening point instrument, and described asphalt softening point instrument includes treating school temperature sensor and container; This calibrating installation includes: detection temperature sensor, treats that school temperature sensor is respectively provided with in the above-described container with described, for treating that school temperature sensor each carries out temperature acquisition with described; Trigger device, arrange in the above-described container, be used for producing an analysis moment; Analytical equipment, for described analysis the moment respectively by described detection temperature sensor and described in treat that the temperature that school temperature sensor each gathers compares.
Preferably, with described, described detection temperature sensor treats that school temperature sensor is close but does not contact.
Preferably, described detection temperature sensor all contacts with the upper backup pad of described asphalt softening point instrument with the described bottom treating school temperature sensor.
Preferably, described upper backup pad being provided with center rest, described center rest is stable for the bottom of described detection temperature sensor is carried out.
Preferably, described triggering device includes: sleeve pipe, is arranged on the upper backup pad of described asphalt softening point instrument towards the lower supporting plate of described asphalt softening point instrument; Movable block, is arranged in described sleeve pipe, does not contact with the lower supporting plate of described asphalt softening point instrument, for according to control action or instruction along described cannula slide to the process contact described lower supporting plate in produce the described analysis moment.
Preferably, described triggering device also includes: controller, is used for receiving described control action or instruction; Connecting line, is connected between described movable block and described controller, is hung by described movable block and is located in described sleeve pipe and described movable block is not contacted with described lower supporting plate; Wherein, when described controller receives described control action or instruction, unclamp described connecting line.
Preferably, described movable block is along described cannula slide to the approach contacting described lower supporting plate, through the light exposure pathways of the photoswitch of described asphalt softening point instrument; Described movable block produces the described analysis moment when stopping the light exposure pathways of described photoswitch along described cannula slide; Wherein, described photoswitch is arranged on the outside of described container.
Preferably, this calibrating installation farther includes: detection timer, for recording the solution heated time in described container continuously; Described analytical equipment be further used for the time according to described detection timer record and described in treat the temperature of school temperature sensor continuous acquisition, make and treat school heating curve, and treat that school heating curve compares with the standard heating curve preset by described.
Compared with prior art, this utility model adopts triggering device to produce to analyze the moment, inscribe respectively by detection temperature sensor and asphalt softening point instrument treat that the temperature that school temperature sensor each gathers compares during to this analysis, precisely analyze the accuracy treating school temperature sensor, and utilize and inscribe respectively by detection timer and asphalt softening point instrument treat that school timer each self-recording time compares during this analysis, precisely analyze the accuracy treating school timer, solve the defect that prior art cannot monitor the true temperature of steel ball contact lower supporting plate moment in real time, improve precision and the accuracy of calibrating/calibration, treating school temperature sensor and treating whether school timer meets error requirements in intuitive judgment asphalt softening point instrument, reduce the complexity of operating procedure. this utility model adopts high-precision temperature sensor Real-time Collection bath temperature, and the heating rate numerical value of collection is compared in real time with standard heating-rate curve, it is possible to judge accurately, intuitively the heating in asphalt softening point instrument whether uniformly, warming-in-water whether at the uniform velocity.
This utility model solves the defect that prior art cannot monitor the true temperature of steel ball contact lower supporting plate moment in real time, improves precision and the accuracy of calibrating/calibration, reduces the complexity of operating procedure. Calibrating installation is carried out split-type design by this utility model, facilitates removing and installing of each several part, improves the portability of equipment.
Other features and advantages of the utility model will be set forth in the following description, and, partly become apparent from description, or understand by implementing the technical solution of the utility model. The purpose of this utility model and other advantages can be realized by structure specifically noted in description, claims and accompanying drawing and/or flow process and be obtained.
Accompanying drawing explanation
Accompanying drawing is used for providing being further appreciated by the technical solution of the utility model or prior art, and constitutes a part for description. Wherein, the accompanying drawing expressing this utility model embodiment is used for explaining the technical solution of the utility model together with embodiment of the present utility model, but is not intended that the restriction to technical solutions of the utility model.
Fig. 1 is the organigram of the calibrating installation of the asphalt softening point instrument of this utility model embodiment.
Fig. 2 is the schematic flow sheet during calibrating installation calibration of the asphalt softening point instrument of this utility model embodiment.
Detailed description of the invention
Describing embodiment of the present utility model in detail below with reference to drawings and Examples, to this utility model, how application technology means solve technical problem whereby, and the process that realizes reaching relevant art effect can fully understand and implement according to this. Each feature in this utility model embodiment and embodiment, can be combined with each other under not colliding premise, and the technical scheme formed is all within protection domain of the present utility model.
As it is shown in figure 1, the calibrating installation of asphalt softening point instrument of the present utility model mainly includes detection temperature sensor 1, center rest 2, detection timer (not shown), triggers device and analytical equipment 4. The asphalt softening point instrument of calibrating to be calibrated includes top cover 51, instrument carries treats that what school temperature sensor 52, instrument carried treats school timer (not shown), upper backup pad 53, lower supporting plate 54, column 55, container 56 and be positioned at the heater 57 etc. below container 56. When asphalt softening point instrument is calibrated, container 56 provide water bath. Top cover 51 covers on container 56, and column 55 is arranged on top cover 51. Upper backup pad 53 and lower supporting plate 54 are installed in parallel on column 55, are respectively positioned on below top cover 51. That is, upper backup pad 53 and lower supporting plate 54 are by column and top cover 51, it is arranged in container 56.
What detection temperature sensor 1 in calibrating installation of the present utility model and asphalt softening point instrument Instrumental carried treats school temperature sensor 52, both pass through top cover 51 and be inserted in container 56, each comfortable container 56 carries out temperature acquisition, it is thus achieved that have the temperature of the water bath that container 56 provides. What detection timer and asphalt softening point instrument carried treats that school timer each carries out timing. Triggering device utilizes upper backup pad 53 etc. to be arranged in container 56, is mainly used in timer and produces an analysis moment. Analytical equipment is mainly used to inscribing respectively by detection temperature sensor 1 and treat that the temperature that school temperature sensor 52 each gathers compares when this analysis, and inscribe respectively by detection timer and treat that school timer each self-recording time compares during to this analysis, detection temperature sensor 1 is utilized precisely to analyze the error treating school temperature sensor 52, it is judged that to treat school temperature sensor 52 accuracy; Detection timer is also utilized precisely to analyze the error treating school timer, it is judged that to treat the accuracy of school timer.
Detection temperature sensor 1 with treat school temperature sensor 52 close proximity to but do not contact, with the temperature survey that both guarantees carry out for same water bath region, avoid the gauging error because the temperature contrast of different parts in container 56 causes, while reducing the error of calibrating/calibration, be independent of each other again respective temperature survey mutually as far as possible.
Detection temperature sensor 1 and treat that the bottom of school temperature sensor 52 is all in close contact with the upper backup pad 53 of asphalt softening point instrument. Center rest 2 is arranged on upper backup pad 53, is used for carrying out the bottom of detection temperature sensor 1 stablizing. Center rest 2 can also be used to adjust the horizontal level of temperature sensor 1, so that temperature sensor 1 to adjust the distance suitable with treating school temperature sensor 52.
Trigger device mainly include sleeve pipe 31 and be arranged in the movable block 32 that sleeve pipe 31 falls along sleeve pipe 31.Also setting up porose on upper backup pad 53, sleeve pipe 31 is arranged in the hole on upper backup pad 53 towards lower supporting plate 54, and movable block 32 is arranged in sleeve pipe 31. Movable block 32 does not all contact with lower supporting plate 54 with sleeve pipe 31, the distance between sleeve pipe 31 and lower supporting plate 54, less than the movable block 32 length along sleeve pipe 31 axis direction. In other examples, sleeve pipe 31 and lower supporting plate 54 contact with each other also is feasible. When needing until the temperature measured by school temperature sensor 52, are compared calibration a certain moment, it is possible to perform control action or send control instruction. Movable block 32 is in response to control action or control instruction, along described cannula slide, until touching lower supporting plate 54 and stopping sliding. In the sliding process of movable block 32, the aforesaid analysis moment can be produced.
Trigger device and also include controller 33 and the connecting line 34 being connected between movable block 32 and controller 33. In use, movable block 32 is hung by connecting line 34 and is located in sleeve pipe 31, between movable block 32 and lower supporting plate 54 at a distance. Controller 33 is used for receiving aforesaid control action or control instruction, and when controller 33 applying operation control action (such as touching etc.) or sending instruction, controller 33 unclamps connecting line 34. Under gravity, movable block 32 is along sleeve pipe 31 landing until contact lower supporting plate 54 stops. Owing to the distance between sleeve pipe 31 and lower supporting plate 54 is less than the movable block 32 length along sleeve pipe 31 axis direction, therefore movable block 32 does not fall out sleeve pipe 31. Controller 33 can be manual, it is also possible to is automatic. In the embodiment shown in fig. 1, controller 33 is the electromagnetic driver of Non-follow control.
When calibration, first the solution (such as water) in container 56 is heated, warming-in-water. Detection temperature sensor 1 and treat the respective Real-time Collection bath temperature of school temperature sensor 52, is referred to as the first temperature by the bath temperature that detection temperature sensor 1 gathers, will treat that the bath temperature that school temperature sensor 52 gathers is referred to as the second temperature. The asphalt softening point instrument of calibrating to be calibrated also includes the photoswitch (also referred to as photoelectric tube) being arranged on outside container 56, the light exposure pathways of photoswitch is through the region being separated by movable block 32 and lower supporting plate 54, movable block 32 slides into the approach of contact lower supporting plate 54 along sleeve pipe 31 in other words, can pass the light exposure pathways of the photoswitch of asphalt softening point instrument. When movable block 32 is slipped to along sleeve pipe 31 in the process of contact lower supporting plate 54, the light exposure pathways of photoswitch can be stopped by movable block 32, thus controller 33 is operated or sends moment of instruction can by accurate recording.
Controller 33 is operated, or it is very little along the time difference of the light exposure pathways of sleeve pipe 31 landing stop photoswitch to send instructions to movable block 32 to controller 33, it is negligible, therefore movable block 32 can being stopped along sleeve pipe 31 landing, the moment of the light exposure pathways of photoswitch is considered as controller 33 being operated or sending to controller 33 moment of instruction.
This utility model can control the movable block 32 decline in sleeve pipe 31 by trigger controller 33 at any time, it is obtained in that movable block 32 contacts lower supporting plate moment respectively by detection temperature sensor 1 and treat the true temperature that school temperature sensor 52 gathers, and can exactly the two temperature each gathered be compared, it is thus possible to utilize the detection temperature sensor 1 gathering the first temperature to carry out analytic set gather the accuracy treating school temperature sensor 52 of the second temperature, it is ensured that the precision of analytic set.
In embodiment of the present utility model, timer to be measured is also used for continuously the solution heated time in record container 56. Analytical equipment 4 is also used for the heat time heating time recorded according to timer to be measured, and treat the temperature of 52 continuous acquisition of school temperature sensor, produce heating curve to be measured, and utilize the standard heating curve preset to compare with heating curve to be measured, the temperature-rise period treating school temperature sensor 52 record is calibrated, it is judged that whether the heating of heater 57 bath temperature whether uniformly, in container 56 rises uniform. To treat that school heating curve is plotted in same coordinate system with the calibration heating curve as reference frame and shows, just can be apparent from the thermometric accuracy treating school temperature sensor 52 in bath temperature uphill process, and whether the heating of heater 57 and bath temperature rise uniform.
The calibrating installation of the asphalt softening point instrument of the present utility model calibration process when calibration, this calibrating installation is mainly used to the accuracy treating school temperature sensor in asphalt softening point instrument is calibrated, it is judged that treat that the error of school temperature sensor is whether in allowed band. Asphalt softening point instrument also includes the container for providing water bath. As in figure 2 it is shown, this calibration process mainly comprises the steps.
Step S210, by a detection temperature sensor with treat that school temperature sensor is respectively provided with in a reservoir.
Step S220, the bath temperature utilizing this detection temperature sensor with treating in school temperature sensor difference collection container.
Step S230, triggers setting movable block in a reservoir, utilizes the mobile generation one of this movable block to analyze the moment.
Step S240, to analyzing the moment respectively by detection temperature sensor and treat that the temperature that school temperature sensor each gathers compares.
In the process of the bath temperature utilizing this detection temperature sensor and treat in school temperature sensor collection container respectively, also utilize what a detection timer and asphalt softening point instrument carried to treat that school timer carries out timing respectively. After triggered activity block moves this analysis moment of generation, inscribe respectively by detection timer and treat that school timer each self-recording time compares during to this analysis, detection timer is utilized precisely to analyze the error treating school timer, it is judged that to treat the accuracy of school timer.
In embodiment of the present utility model, how movable block is triggered and to move, and then produces to analyze the processes such as moment, referring also to the embodiment of such alignment device, repeats no more herein.
The calibrating installation of asphalt softening point instrument of the present utility model, it is also possible to whether the heater heating process being used for judging in asphalt softening point instrument is uniform, and in container, whether the rising of bath temperature is uniform. Specifically, the timer to be measured that asphalt softening point instrument carries is utilized to record solution (namely water bath) the heated time in container continuously. The time recorded according to timer to be measured and the temperature treating school temperature sensor continuous acquisition, produce one and treat school heating curve, and performance is the asphalt softening point instrument self record to temperature-rise period. Again this is treated that school heating curve compares with the standard heating curve preset, can judge that whether the heater heating process in asphalt softening point instrument is uniform, and in container, whether the rising of bath temperature is uniform.
In embodiment of the present utility model, what detection temperature sensor was selected is platinum resistance thermometer, is more nearly practical situation according to the heating curve that its temperature gathered makes, reduces the error that low accuracy temperature sensor brings because of precision reason.
In embodiment of the present utility model, for the ease of reading, the memorizer in analytical equipment employs FatFS file system, and invents USB flash disk pattern, and computer is connected with the processor in analytical equipment by USB interface, it is possible to directly read measurement result file.In measurement process, for the ease of real-time monitored variations in temperature, processor, by the liquid crystal display screen in FSMC bus driver analytical equipment, shows the time dependent heating curve of temperature drawn in real time.
This utility model adopts high-precision platinum resistance temperature sensor to replace normal thermometer Real-time Collection temperature data of the prior art, calculates the heating rate of acquisition accordingly closer to practical situation, higher than existing collimation technique accuracy. This utility model is by treating the school temperature sensor temperature at synchronization in synchronous acquisition detection temperature sensor and asphalt softening point instrument, thus ensure that the accuracy that asphalt softening point is measured by instrument. This utility model adopts full automatic data acquisition and analysis, and the detection making asphalt softening point and heating curve is more convenient, reduces labor intensity, improves calibration efficiency.
The calibrating installation of asphalt softening point instrument of the present utility model, application temperature sensors of high precision is measured and collecting temperature in real time, solve the discontinuous problem of data acquisition caused every temperature of a few minutes collection in prior art, improve the accuracy of temperature acquisition. This utility model adopts the bath temperature that the timing of high performance arm processor is read and recorded in container, real-time rendering temperature variation curve simultaneously, generate the tractable form document of readability, and adopt jumbo memorizer to preserve substantial amounts of measurement data, user is allowed to check at any time according to user's request, it is not necessary to connect computer. In this utility model, the reading manner of measured temperature data adopts USB flash disk pattern, it is not necessary to any upper computer software, and computer can pass through USB interface at any time and be connected read data files with this device, and data reading matter is convenient and swift.
This utility model utilizes high-precision temperature sensor continuous acquisition bath temperature, and utilize detection timer to record the time continuously, time and the bath temperature gathered are associated, solve the discontinuous problem of data acquisition caused every temperature data of a few minutes collection in prior art, improve real-time and the accuracy of data acquisition. This utility model is additionally based upon the association to time with the bath temperature gathered, the heating curve reflecting real-time temperature-rise period accurately can be produced, solve prior art and real-time continuous cannot monitor bath temperature to understand the problems such as the real-time temperature-rise period of water bath. By comparing with standard heating curve, it is possible to the clear heating curve calibrating asphalt softening point instrument. Moment when this utility model record movable block contacts with lower supporting plate and bath temperature, solving temperature detection in prior art can not with the problem by the Tong Bu reading temperature data of test examination instrument.
Although the embodiment disclosed by this utility model is as above, but described content is only the embodiment readily appreciating technical solutions of the utility model and adopt, and is not limited to this utility model. Technical staff in any this utility model art; under the premise without departing from the spirit and scope disclosed by this utility model; any amendment and change can be carried out in the form implemented and details; but scope of patent protection of the present utility model, still must be as the criterion with the scope that appending claims defines.
Claims (8)
1. a calibrating installation for asphalt softening point instrument, described asphalt softening point instrument includes treating school temperature sensor, treating school timer and container; It is characterized in that, this calibrating installation includes:
With described, detection timer, for treating that school timer each carries out timing;
With described, detection temperature sensor, treats that school temperature sensor is respectively provided with in the above-described container, for treating that school temperature sensor each carries out temperature acquisition with described;
Trigger device, arrange in the above-described container, be used for producing an analysis moment;
Analytical equipment, for to described analysis the moment respectively by described detection temperature sensor and described in treat that the temperature that school temperature sensor each gathers compares, to described analysis the moment respectively by described detection timer and described in treat that school timer each self-recording time compares.
2. calibrating installation according to claim 1, it is characterised in that:
With described, described detection temperature sensor treats that school temperature sensor is close but does not contact.
3. calibrating installation according to claim 1, it is characterised in that:
Described detection temperature sensor all contacts with the upper backup pad of described asphalt softening point instrument with the described bottom treating school temperature sensor.
4. calibrating installation according to claim 3, it is characterised in that:
Being provided with center rest on described upper backup pad, described center rest is stable for the bottom of described detection temperature sensor is carried out.
5. calibrating installation according to claim 1, it is characterised in that described triggering device includes:
Sleeve pipe, is arranged on the upper backup pad of described asphalt softening point instrument towards the lower supporting plate of described asphalt softening point instrument;
Movable block, is arranged in described sleeve pipe, does not contact with the lower supporting plate of described asphalt softening point instrument, for according to control action or instruction along described cannula slide to the process contact described lower supporting plate in produce the described analysis moment.
6. calibrating installation according to claim 5, it is characterised in that described triggering device also includes:
Controller, is used for receiving described control action or instruction;
Connecting line, is connected between described movable block and described controller, is hung by described movable block and is located in described sleeve pipe and described movable block is not contacted with described lower supporting plate;
Wherein, when described controller receives described control action or instruction, unclamp described connecting line.
7. the calibrating installation according to claim 5 or 6, it is characterised in that:
Described movable block is along described cannula slide to the approach contacting described lower supporting plate, through the light exposure pathways of the photoswitch of described asphalt softening point instrument; Described movable block produces the described analysis moment when stopping the light exposure pathways of described photoswitch along described cannula slide;
Wherein, described photoswitch is arranged on the outside of described container.
8. calibrating installation according to claim 1, it is characterised in that:
Described detection timer is for recording the solution heated time in described container continuously;
Described analytical equipment be further used for the time according to described detection timer record and described in treat the temperature of school temperature sensor continuous acquisition, make and treat school heating curve, and treat that school heating curve compares with the standard heating curve preset by described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521081220.8U CN205317702U (en) | 2015-12-23 | 2015-12-23 | Calibrating device of pitch softening point appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521081220.8U CN205317702U (en) | 2015-12-23 | 2015-12-23 | Calibrating device of pitch softening point appearance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205317702U true CN205317702U (en) | 2016-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521081220.8U Active CN205317702U (en) | 2015-12-23 | 2015-12-23 | Calibrating device of pitch softening point appearance |
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| Country | Link |
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| CN (1) | CN205317702U (en) |
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2015
- 2015-12-23 CN CN201521081220.8U patent/CN205317702U/en active Active
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