Paraffin light stability testing device

Abstract

The utility model discloses a paraffin light stability testing device which is of a constant-temperature box structure, and the box is internally provided with at least: a pretreatment area in which a sample cup for containing paraffin and a sampling needle are arranged; the sampling needle is mounted on a sliding rail, the initial position of the sampling needle is positioned right above the sample cup, and the sampling needle can move downwards into the sampling cup to suck paraffin; a light ampere vessel and a light stability tester are arranged in the mercury lamp irradiation area; the photoampere vessel is arranged on the first conveyor belt, and the photoampere vessel can be conveyed into the light stability tester to be irradiated by a mercury lamp after the sampling needle moves to the position over the photoampere vessel through the sliding rail and releases molten paraffin into the photoampere vessel; a cuvette and a colorimeter are arranged in the colorimetric area; and the cuvette is arranged on the second conveying belt, and can be conveyed into the colorimetric colorimeter for visual inspection and colorimetry after the sampling needle moves to the position right above the cuvette through the sliding rail and the paraffin irradiated by the mercury lamp is released into the cuvette.

Description

Technical Field

[0001] This utility model relates to the field of testing and analysis technology in the petrochemical industry, and in particular to a paraffin light stability testing device. Background Technology

[0002] Most paraffin wax testing and analysis instruments have low levels of automation, relying heavily on manual operation, which is time-consuming, labor-intensive, and inefficient. Most paraffin waxes are solid at room temperature, requiring pretreatment before testing, increasing the analytical difficulty. SH / T 0404-2008 "Determination of Optical Stability of Paraffin Wax" references SH / T 0403-1992 "Determination of Colorimetry of Paraffin Wax" to determine the optical stability of paraffin wax products. The specific procedure involves placing a sample dish filled with molten wax sample in a constant temperature chamber under ultraviolet light irradiation of 12.0 mW / cm². 2 ±0.3mW / cm 2 Irradiate at 90℃±1℃ for 45 minutes, and then determine the color of paraffin (after melting into liquid) according to the standard color chart colorimeter comparison method in SH / T 0403-1992.

[0003] The above experiments used three pieces of equipment: an oven, an optical stability tester, and a colorimeter. The manual operation was complex, requiring operators to move between these three instruments. If the operation was not fast enough, the paraffin wax would solidify. Furthermore, transporting the molten paraffin samples exposed to cold air could introduce air bubbles into the photoammonia, affecting the test results.

[0004] Chinese patent application CN105424612A discloses a device for testing the optical stability of paraffin wax, relating to the field of optical stability testing technology. One side of the main housing is a main control box with a control panel. A sliding door with a handle is located on one side of the control panel, and a viewing window is installed below the handle. An adjustable motor is located at the top of the main housing, connected to an adjustable rod located inside the main housing. A reflector is located below the adjustable rod, and a UV lamp is fixed to the reflector. A partition is installed at the bottom of the main housing, with a heating element at the bottom of the partition, and a sample container is placed on the partition. This device has a simple and reasonable structure, using UVB313 as the irradiation light source, which is closer to the solar ultraviolet spectrum than a high-pressure mercury lamp. This optical stability testing device can test a large number of samples, and the testing environment is more suitable for storage conditions. The device can test more than four samples simultaneously.

[0005] While this type of approach can guarantee a large sample volume, the melting of solid samples, ultraviolet irradiation, and colorimetry are still carried out in different containers. In particular, after ultraviolet irradiation, the sample gas still needs to be removed before colorimetry can be performed, which inevitably affects the test results.

[0006] Therefore, there is an urgent need for a fully automated, integrated device for testing the light stability of paraffin wax. This device not only avoids the solidification of paraffin wax upon contact with air and the introduction of air bubbles into the light ampoules, but also saves manpower and improves testing efficiency through its fully automated process.

[0007] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0008] The purpose of this invention is to provide a paraffin light stability testing device that can be operated in the same constant temperature chamber. By setting up three zones in the constant temperature chamber: a pretreatment zone, a mercury lamp irradiation zone, and a colorimetric zone, the device can prevent contact with the external environment between the three processes of melting the wax sample, irradiation, and colorimetric analysis, and the entire process can be automatically controlled.

[0009] To achieve the above objectives, this utility model provides a paraffin light stability testing device. The device is a constant temperature chamber structure, which includes at least: a pretreatment area containing a sample cup holding paraffin and a sampling needle; the sampling needle is mounted on a slide rail, its initial position being directly above the sample cup and capable of moving down into the sample cup to draw a measured amount of molten paraffin; and a mercury lamp irradiation area containing a photoammonia and a light stability measuring instrument; the photoammonia is positioned on a first conveyor belt. The sampling needle moves along the slide rail to directly above the photoammonia and releases molten paraffin into the photoammonia, after which the photoammonia is conveyed to the optical stability tester for mercury lamp irradiation; the colorimetric area contains cuvettes and a colorimeter; the cuvettes are set on the second conveyor belt, and after the sampling needle moves along the slide rail to directly above the cuvettes and releases the mercury-illuminated paraffin into the cuvettes, the cuvettes are conveyed to the colorimeter for visual colorimetric comparison.

[0010] Furthermore, in the above technical solution, the bottom surfaces of the sample cup, photoammonia, and cuvette are preferably at the same height.

[0011] Furthermore, in the above technical solution, the sampling needle is retractable, which can be used to draw or release molten paraffin after extension, and to move on the slide rail after contraction.

[0012] Furthermore, in the above technical solution, the sampling needle is equipped with a push-pull actuator for absorbing and releasing molten paraffin.

[0013] Furthermore, in the above technical solution, the slide rail can be fixed to the top of the constant temperature chamber and runs through the pretreatment area, the mercury lamp irradiation area, and the colorimetric area.

[0014] Furthermore, in the above technical solution, the sampling needle may have a first preset stopping position, a second preset stopping position, and a third preset stopping position on the slide rail; the three preset stopping positions correspond to the position of the sample cup, the initial position of the photoammonia, and the initial position of the cuvette, respectively.

[0015] Furthermore, in the above technical solution, a temperature sensor may be installed inside the constant temperature chamber.

[0016] Furthermore, in the above technical solution, the pretreatment area of ​​the constant temperature chamber, the mercury lamp irradiation area, and the colorimetric area can be respectively equipped with a first chamber door, a second chamber door, and a third chamber door; each of the chamber doors can be equipped with a viewing window.

[0017] Furthermore, in the above technical solution, a controller can be provided on the outer wall of the constant temperature chamber to control the temperature inside the constant temperature chamber, the extension and retraction of the sampling needle, the action of the push-pull actuator on the sampling needle, the movement and dwell of the sampling needle on the slide rail, the reciprocating movement of the photometer inside and outside the photostability measuring instrument, and the reciprocating movement of the cuvette inside and outside the colorimeter.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1) This utility model can complete the three consecutive procedures of sampling, mercury lamp irradiation and colorimetry in the same constant temperature chamber. It can keep the liquid paraffin after heating and melting at a constant temperature throughout the test process and prevent it from coming into contact with the atmosphere. This can effectively avoid the phenomenon of paraffin solidification caused by inexperienced operation. When transporting the molten paraffin sample, it can avoid the problems of encountering cold air and air bubbles entering the photoammonia, thus ensuring the accuracy of the test results.

[0020] 2) The use of slide rails, the first conveyor belt, and the second conveyor belt can create conditions for the "fully automatic process" of the test of this utility model, effectively saving manpower and improving test efficiency; the use of controllers can not only be used to control the temperature in the constant temperature chamber, but also to control the action of the mechanical structure of this utility model: including the extension and retraction of the sampling needle, the action of the push-pull actuator on the sampling needle, the movement and dwell of the sampling needle on the slide rail, the reciprocating movement of the photometer inside and outside the photostability tester, the reciprocating movement of the cuvette inside and outside the colorimeter, etc., thereby realizing the full automation of the entire test process.

[0021] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, and to make the above and other objects, technical features and advantages of this utility model easier to understand, one or more preferred embodiments are listed below and described in detail with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the internal structure of the paraffin optical stability testing device of this utility model.

[0023] Figure 2 This is a front view of the paraffin light stability testing device of this utility model (showing the first door, the second door, the third door, and the viewing window on the door).

[0024] Explanation of key figure labels:

[0025] 1-Constant temperature chamber, 1A-Pretreatment area, 1B-Mercury lamp irradiation area, 1C-Colorimetric area, 2-Slide rail, 21-Sampling needle, 3-Sample cup, 31-Platform, 4-Photometric ampoule, 41-First conveyor belt, 5-Photometric stability tester, 6-Cuvette, 61-Second conveyor belt, 7-Colorimeter, 8-First chamber door, 81-First viewing window, 9-Second chamber door, 91-Second viewing window, 10-Third chamber door, 101-Third viewing window. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.

[0027] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0028] In this document, for ease of description, spatial relative terms such as “below,” “under,” “down,” “above,” “above,” “upper,” etc., are used to describe the relationship of one element or feature to another element or feature in the accompanying drawings. It should be understood that spatial relative terms are intended to encompass different orientations of an object in use or operation, in addition to those depicted in the figures. For example, if an object in the figure is flipped, an element described as “below” or “under” another element or feature would be oriented “above” that element or feature. Thus, the exemplary term “below” can encompass both the downward and upward orientations. An object may also have other orientations (rotated 90 degrees or other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0029] In this document, the terms "first," "second," etc., are used to distinguish two different elements or parts, and are not used to define specific positions or relative relationships. In other words, in some embodiments, the terms "first," "second," etc., can also be used interchangeably.

[0030] like Figure 1As shown, this utility model provides a paraffin light stability testing device. The device is a constant temperature chamber structure, with a pretreatment zone 1A, a mercury lamp irradiation zone 1B, and a colorimetric zone 1C inside. The pretreatment zone 1A contains a sample cup 3 holding paraffin (i.e., solid paraffin) and a sampling needle 21. The sampling needle 21 is mounted on a slide rail 2, initially positioned directly above the sample cup 3 and capable of moving down to the sample cup 3 to draw a measured amount of molten paraffin. The mercury lamp irradiation zone 1B contains a light ampoule 4 and a light stability measuring instrument 5. The light ampoule 4 is positioned on a first conveyor belt 41. After the sampling needle 21 moves along the slide rail 2 to directly above the light ampoule 4 and releases molten paraffin into it, the light ampoule 4 is then conveyed to the light stability measuring instrument 5 for mercury lamp irradiation. The colorimetric zone 1C contains a cuvette 6 and a colorimeter 7. The cuvette 6 is placed on the second conveyor belt 61. After the sampling needle 21 moves to the top of the cuvette 6 via the slide rail 2 and releases the paraffin wax irradiated by the mercury lamp into the cuvette 6, the cuvette 6 is conveyed to the colorimeter 7 for visual colorimetric comparison.

[0031] This invention employs the aforementioned technical solution, allowing the three consecutive procedures of sampling, mercury lamp irradiation, and colorimetry to be completed within the same constant temperature chamber. This ensures that the molten paraffin remains at a constant temperature throughout the entire testing process and is not exposed to the atmosphere, effectively preventing paraffin solidification due to operator inexperience. Furthermore, it avoids exposure to cold air and air bubbles within the photoammonia when transporting molten paraffin samples, guaranteeing the accuracy of the test results. The use of the slide rail, first conveyor belt, and second conveyor belt enables a fully automated testing process, effectively saving manpower and improving testing efficiency.

[0032] Further as Figure 1 As shown, the bottom surfaces of sample cup 3, photoammonia 4, and cuvette 6 are preferably at the same height. The sampling needle 21 is retractable (not shown) for drawing or releasing molten paraffin wax after extension, and for moving on a slide rail after retraction. "Retractable" means that the free end of the sampling needle 21 can move downwards or upwards, which can be achieved using existing mechanical structures to draw molten paraffin wax from sample cup 3 and release it into photoammonia 4, and to draw and release it into cuvette 6, according to the test procedure. Furthermore, the sampling needle 21 is provided with a push-pull actuator (not shown) for drawing and releasing molten paraffin wax. This mechanism can be an existing syringe-like automatic control structure, as long as it can execute the action of drawing or releasing the sampling needle 21 when needed.

[0033] Further as Figure 1As shown, the slide rail 2 is horizontally positioned and can be fixed to the top of the constant temperature chamber 1, passing through the pretreatment area 1A, the mercury lamp irradiation area 1B, and the colorimetric area 1C. The sampling needle 21 has a first preset stopping position, a second preset stopping position, and a third preset stopping position on the slide rail 2; these three preset stopping positions correspond to the positions of the sample cup 3, the initial position of the photoammonia 4, and the initial position of the colorimetric cuvette 6, respectively. (Reference) Figure 1 The first preset stopping position is directly above the stationary position of sample cup 3; the second preset stopping position is directly above the position of light ampoule 4 before "sample collection"; and the third preset stopping position is directly above the position of cuvette 6 before "sample collection". By setting the above three preset stopping positions, the controller can control the sampling needle to move to the designated position and complete the aspiration and release of the liquid paraffin sample.

[0034] Further as Figure 2 As shown, the pretreatment area 1A, mercury lamp irradiation area 1B, and colorimetric area 1C of the constant temperature chamber 1 are respectively equipped with a first chamber door 8, a second chamber door 9, and a third chamber door 10; each door is equipped with a viewing window (i.e., a first viewing window 81, a second viewing window 91, and a third viewing window 101). Furthermore, a controller (not shown in the figure) is provided on the outer wall of the constant temperature chamber 1. This controller can be an existing integrated controller, which can not only control the temperature inside the constant temperature chamber (which can be connected to the temperature sensor inside the constant temperature chamber), but also control the operation of the mechanical structure of this invention: including the extension and retraction of the sampling needle, the action of the push-pull actuator on the sampling needle, the movement and dwell of the sampling needle on the slide rail, the reciprocating movement of the photoammonia inside and outside the photostability measuring instrument, and the reciprocating movement of the cuvette inside and outside the colorimeter, etc.

[0035] The following is combined with Figure 1 , Figure 2 Detailed explanation of the operation process of the testing device of this utility model (the process can be fully automated after the device is running):

[0036] 1) Place the cleaned sampling needle 21, sample cup 3, photoammonia 4, and cuvette 6 into their fixed positions within the constant temperature chamber 1 of this invention; 2) Open the first chamber door 8, place the block wax into the sample cup 3, and start the controller to run the RUN program; 3) Heat the constant temperature chamber 1 to the required temperature and fully melt the wax sample. The temperature chamber is preferably heated to 89–91°C, and the heating time can be 0.5–1 hour. During this stage, all moving parts inside the chamber are stationary; 4) Position the sampling needle 21 directly above the sample cup (i.e., the first preset stopping position) and aspirate a quantitative amount of sample; 5) After aspirating the sample, move the sampling needle 21 along the slide rail to directly above the photoammonia 4 (i.e., the second preset stopping position). 6) Start the first conveyor belt 41 to move the photoammonia 4 into the photometric stability analyzer 5. At this time, the mercury lamp is turned on and the sample is irradiated for 45 minutes. 7) Restart the first conveyor belt 41 to reverse its direction and return the photoammonia 4 to its initial position. 8) After the sampling needle 21 picks up the quantitative sample from the photoammonia 4, it moves along the slide rail 2 to directly above the cuvette 6 (i.e., the third preset stopping position) and pushes the sample into the cuvette 6. 9) Start the second conveyor belt 61 to send the cuvette 6 into the colorimeter 7 for visual colorimetric comparison and record the test results. 10) Restart the second conveyor belt 61 to reverse its direction and return the cuvette 6 to its initial position. After the test is completed, click the STOP button on the controller. 11) After the constant temperature chamber 1 cools down to room temperature, open the first chamber door 8, the second chamber door 9, and the third chamber door 10 of the constant temperature chamber, take out the sampling needle 21, sample cup 3, photoammonia 4, and cuvette 6, and clean them.

[0037] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical applications, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. Any simple modifications, equivalent changes, and alterations made to the foregoing exemplary embodiments should fall within the protection scope of the present invention.

Claims

1. A paraffin light stability testing device, characterized in that, The device is a constant temperature chamber structure, and the constant temperature chamber contains: The pretreatment area contains a sample cup for holding paraffin wax and a sampling needle. The sampling needle is mounted on a slide rail and is initially positioned directly above the sample cup. It can be moved down into the sample cup to draw a fixed amount of molten paraffin wax. The mercury lamp irradiation area is equipped with a photoammonia and an optical stability measuring instrument. The photoammonia is placed on the first conveyor belt. After the sampling needle moves to the top of the photoammonia through the slide rail and releases the molten paraffin into the photoammonia, the photoammonia is conveyed to the optical stability measuring instrument for mercury lamp irradiation. The colorimetric area contains cuvettes and a colorimeter. The cuvettes are mounted on a second conveyor belt. After the sampling needle moves above the cuvettes via the slide rail and releases the paraffin wax irradiated by the mercury lamp into the cuvettes, the cuvettes are conveyed to the colorimeters for visual colorimetric comparison.

2. The paraffin light stability testing device according to claim 1, characterized in that, The bottom surfaces of the sample cup, photoammonia, and cuvette are at the same height.

3. The paraffin light stability testing device according to claim 2, characterized in that, The sampling needle is retractable, used to draw in or release molten paraffin when extended, and to move on a slide rail when retracted.

4. The paraffin light stability testing device according to claim 3, characterized in that, The sampling needle is equipped with a push-pull actuator for drawing in and releasing molten paraffin.

5. The paraffin light stability testing device according to claim 1, characterized in that, The slide rail is fixed to the top of the constant temperature chamber and runs through the pretreatment area, the mercury lamp irradiation area, and the colorimetric area.

6. The paraffin light stability testing device according to claim 4, characterized in that, The sampling needle has a first preset stopping position, a second preset stopping position, and a third preset stopping position on the slide rail; The three preset dwell positions correspond to the positions of the sample cup, the initial position of the photoammonia, and the initial position of the cuvette, respectively.

7. The paraffin light stability testing apparatus according to claim 1, characterized in that, The constant temperature chamber is equipped with a temperature sensor.

8. The paraffin light stability testing apparatus according to claim 1, characterized in that, The constant temperature chamber pretreatment area, mercury lamp irradiation area and colorimetric area are respectively equipped with a first chamber door, a second chamber door and a third chamber door; each chamber door is equipped with a viewing window.

9. The paraffin light stability testing apparatus according to claim 1, characterized in that, The constant temperature chamber is equipped with a controller on its outer wall, which is used to control the temperature inside the constant temperature chamber, the extension and retraction of the sampling needle, the action of the push-pull actuator on the sampling needle, the movement and dwell of the sampling needle on the slide rail, the reciprocating movement of the photometer inside and outside the photostability tester, and the reciprocating movement of the cuvette inside and outside the colorimeter.

Images