Automatic benzene crystallization point measuring device

Abstract

The utility model relates to the field of petrochemical engineering detection instruments, in particular to an automatic benzene crystallization point measuring device which comprises a machine body, a touch screen is embedded on the machine body, a sample mixing device is connected to the side face of the machine body and comprises a lifting seat, the lifting seat is connected into the machine body, and the machine body drives the lifting seat to ascend and descend. A driving motor with a driving rod is fixedly connected to the lifting seat, a test tube rack is fixedly connected to the end, away from the driving motor, of the driving rod, the driving motor drives the test tube rack to rotate back and forth through the driving rod, and the rotating angle range of the test tube rack is 60 degrees; the refrigerating system is arranged below the test tube rack and is connected with the machine body, so that the effects of reducing the contact of the experimenter with the volatile benzene in the determination process and reducing the harm of the volatile benzene in the detection experiment to the experimenter are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical testing instruments, in particular to an automatic benzene crystallization point determiner. Background Art

[0002] The crystallization point is an important physical constant of a substance. The crystallization point of a pure substance is fixed, while the presence of impurities will lower the crystallization point. Therefore, by measuring the crystallization point of benzene, the purity of benzene can be determined.

[0003] The test method given in GBT / 3145-2023 "Determination of the Crystallization Point of Benzene" is: under specified cooling conditions, when the test sample is cooled to a certain temperature, after solid precipitation, the temperature rises again, and the highest temperature reached during the rise is the crystallization point.

[0004] During the test, first shake the small test tube filled with the sample and distilled water vigorously for half a minute, then place it in a cold bath that has been cooled to 0°C in advance, and use a stirrer to stir the sample at a rate of about 60 times per minute; when the sample is cooled to 6°C, take out the small test tube and insert it into the large test tube, and then insert them into the cold bath to continue cooling and stirring the sample; when the temperature drops to a minimum point and then rises to a maximum point, and remains constant at the maximum point for not less than 30 seconds, and then continues to drop, the constant temperature at this maximum point is the crystallization point of the sample.

[0005] The above-mentioned prior art has the following defects:

[0006] According to the requirements of the aforementioned test method, traditional test instruments are mostly manual. Existing automatic instruments are generally limited to magnetic stirring after the test tube is placed in a cold bath. The vigorous shaking process of the small test tube containing the sample is completed manually. The process of vigorously shaking the test tube is not only labor-intensive, but also intensifies the evaporation of benzene, making the experimenter particularly susceptible to exposure to volatile benzene, which in turn causes harm to the experimenter. Utility Model Content

[0007] The purpose of the present invention is to provide an automatic benzene crystallization point tester, so as to reduce the exposure of experimenters to volatile benzene during the measurement process and reduce the harmful effects of volatile benzene on experimenters during the detection experiment, so as to solve the problems raised in the above-mentioned background technology.

[0008] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0009] An automatic benzene crystallization point tester includes a body with a touch screen embedded in the body, a sample mixing device connected to the side of the body, the sample mixing device including a lifting seat connected to the body, and the body drives the lifting seat to perform lifting motion; a driving motor with a driving rod is fixedly connected to the lifting seat, and the end of the driving rod away from the driving motor is fixedly connected to a test tube rack, and the driving motor drives the test tube rack to perform reciprocating rotational motion via the driving rod, and the rotation angle range of the test tube rack is 60 degrees; a refrigeration system is provided below the test tube rack and is connected to the body.

[0010] As a preferred embodiment of the present invention, the refrigeration system includes a refrigerator, a cooling chamber with a cooling medium is provided in the refrigerator, a cooling cover is fastened on the top of the cooling chamber, a refrigeration chamber is provided at the bottom of the cooling chamber, a refrigeration block is placed in the cooling chamber, the refrigeration block is connected to a refrigeration device, the refrigeration device is located outside the refrigeration system, a connecting hole is provided on the bottom wall of the cooling chamber, the connecting hole connects the cooling chamber and the refrigeration chamber; the top of the cooling chamber is covered with a cooling cover, a cooling pipe is embedded in the cooling cover, the bottom of the cooling pipe is connected to the refrigeration chamber, a circulation component is provided between the refrigeration chamber and the cooling chamber, the circulation component is for the cooling medium to circulate in the refrigeration chamber and the cooling chamber.

[0011] As a preferred embodiment of the present invention, the circulation component includes a circulation pump, which is connected to a liquid inlet pipe and a liquid outlet main pipe, one end of the liquid inlet pipe is connected to the refrigeration chamber, and the other end is connected to the circulation pump; one end of the liquid outlet main pipe is connected to the circulation pump, and the other end is divided into a first branch pipe and a second branch pipe, the end of the first branch pipe away from the liquid outlet pipe is inserted into the cooling chamber and then connected to the cooling pipe, a valve is provided on the part of the first branch pipe located outside the cooling chamber, and the end of the second branch pipe away from the liquid outlet main pipe is connected to the cooling chamber.

[0012] As a preferred embodiment of the present invention, the outer side of the refrigerator is wrapped with an insulation layer made of aerogel material.

[0013] Beneficial effects

[0014] The beneficial effects of the utility model are:

[0015] The test tube rack provides a place for workers to place test tubes, and workers put the test tubes into the test tube rack and fix them. The lifting seat is driven by the body to move up and down. When the lifting seat is moving up and down, the drive motor and the test tube rack fixedly connected to the lifting seat move up and down with the lifting seat. When the test tube descends, the test tube enters the refrigeration system for cooling. When the test tube rises, the test tube is lifted out of the refrigeration system. When the product in the test tube needs to be shaken, the test tube is shaken by repeated rotation of the drive motor with a rotation angle range of 60 degrees. By replacing manual shaking with machinery, the entire experimental process greatly reduces the number of human actions involved, thereby reducing the exposure of experimental personnel to volatile benzene during the measurement process and reducing the harmful effects of volatile benzene on experimental personnel in the detection experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a side view of the overall structure of the utility model;

[0018] Figure 2 A schematic diagram showing the structure of the refrigeration system.

[0019] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0020] 1. Machine body; 11. Touch screen; 2. Mixing device; 21. Lifting seat; 22. Drive motor; 23. Test tube rack; 3. Refrigeration system; 31. Refrigeration machine; 32. Cooling chamber; 33. Cooling cover; 34. Refrigeration chamber; 35. Refrigeration device; 36. Connecting hole; 37. Cooling pipe; 38. Refrigeration block; 4. Circulation component; 41. Circulation pump; 42. Liquid inlet pipe; 43. Liquid outlet main pipe; 44. First branch pipe; 45. Second branch pipe; 46. Valve; 5. Insulation layer. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See Figure 1-2As shown, an automatic benzene crystallization point tester includes a cube-shaped body 1, a touch screen 11 is embedded in the body 1, a sample mixing device 2 is connected to the side of the body 1, and the sample mixing device 2 includes a lifting seat 21, the lifting seat 21 is connected to the body 1, and the body 1 drives the lifting seat 21 to move up and down; a driving motor 22 with a driving rod is fixedly connected to the lifting seat 21, and the end of the driving rod away from the driving motor 22 is fixedly connected to a test tube rack 23, and the driving motor 22 drives the test tube rack 23 to rotate back and forth through the driving rod. The rotation angle range of the test tube rack 23 is 60 degrees. By using the driving motor 22 instead of manual operation of the test tube with the sample, the experimenter's contact with volatile benzene during the measurement process is reduced, and the harm to the experimenter caused by volatile benzene in the detection experiment is reduced.

[0023] See Figure 1-2 As shown, a refrigeration system 3 is provided below the test tube rack 23 and connected to the body 1. The refrigeration system 3 includes a refrigerator 31, the outer surface of which is wrapped with an insulation layer 5 made of aerogel material. A cooling chamber 32 containing a cooling medium is defined in the refrigerator 31. A cooling cover 33 is fastened to the top of the cooling chamber 32, and a cooling chamber 34 is defined at the bottom of the cooling chamber 32. A cooling block 38 is placed in the cooling chamber 32, and the cooling block 38 is connected to a refrigeration device 35. The refrigeration device 35 is located outside the refrigeration system 3. A connecting hole 36 is defined on the bottom wall of the cooling chamber 32, connecting the cooling chamber 32 with the cooling chamber 34. The top of the cooling chamber 32 is covered with a cooling cover 33, and a cooling pipe 37 is embedded in the cooling cover 33. The bottom of the cooling pipe 37 is connected to the cooling chamber 34. A circulation component 4 is provided between the cooling chamber 34 and the cooling chamber 32, and the circulation component 4 circulates the cooling medium between the cooling chamber 34 and the cooling chamber 32.

[0024] See Figure 1-2 As shown, the circulation component 4 includes a circulation pump 41, which is connected to a liquid inlet pipe 42 and a liquid outlet main pipe 43. One end of the liquid inlet pipe 42 is connected to the refrigeration chamber 34, and the other end is connected to the circulation pump 41; one end of the liquid outlet main pipe 43 is connected to the circulation pump 41, and the other end is divided into a first branch pipe 44 and a second branch pipe 45. The end of the first branch pipe 44 away from the liquid outlet pipe is inserted into the cooling chamber 32 and then connected to the cooling pipe 37. A valve 46 is provided on the part of the first branch pipe 44 located outside the cooling chamber 32, and the end of the second branch pipe 45 away from the liquid outlet main pipe 43 is connected to the cooling chamber 32. By setting the valve 46 in cooperation with the circulation component 4, the cooling medium in the cooling chamber 32 and the refrigeration chamber 34 can be alternately circulated to ensure a stable cooling effect of the cooling chamber 32.

[0025] A specific application of this embodiment is:

[0026] When a worker uses the device, first, the worker puts the sample to be tested into the test tube, then puts the test tube into the test tube rack 23 for fixation, and the subsequent experimental steps are performed according to the standard.

[0027] When the test tube needs to be shaken, the repeated rotation of the drive motor 22 drives the test tube to shake with a rotation angle range of 60 degrees, and the shaking of the test tube is performed mechanically instead of manually. When the test tube is shaken, the test tube is restored to the position perpendicular to the refrigerator 31.

[0028] If the test tube needs to be immersed in the refrigerator 31 for cooling, the lifting seat 21 is driven by the body 1 to perform a lifting movement. When the lifting seat 21 is performing the lifting movement, the drive motor 22 and the test tube rack 23 fixedly connected to the lifting seat 21 are lifted and lowered along with the lifting seat 21. When the test tube descends, the test tube enters the refrigeration system 3 for cooling. When the test tube rises, the test tube is lifted from the refrigeration system 3. The entire process avoids the worker's operation on the test tube. In summary, through the above steps, the exposure of the experimenter to the volatile benzene during the measurement process is reduced, and the harm caused by the volatile benzene in the detection experiment to the experimenter is reduced.

[0029] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the scope of protection of the present invention.

Claims

1. An automatic benzene crystallization point tester, characterized in that: The invention comprises a machine body (1), a touch screen (11) is embedded in the machine body (1), a sample mixing device (2) is connected to the side of the machine body (1), the sample mixing device (2) comprises a lifting seat (21), the lifting seat (21) is connected to the machine body (1), and the machine body (1) drives the lifting seat (21) to perform lifting motion; a driving motor (22) with a driving rod is fixedly connected to the lifting seat (21), and the end of the driving rod away from the driving motor (22) is fixedly connected to a test tube rack (23), and the driving motor (22) drives the test tube rack (23) to perform reciprocating rotation motion through the driving rod, and the rotation angle range of the test tube rack (23) is 60 degrees; a refrigeration system (3) is provided below the test tube rack (23), and the refrigeration system (3) is connected to the machine body (1).

2. An automatic benzene crystallization point measuring device according to claim 1, characterized in that: The refrigeration system (3) includes a refrigerator (31), a cooling chamber (32) with a cooling medium is provided in the refrigerator (31), a cooling cover (33) is fastened to the top of the cooling chamber (32), a refrigeration chamber (34) is provided at the bottom of the cooling chamber (32), a refrigeration block (38) is placed in the cooling chamber (32), the refrigeration block (38) is connected to a refrigeration device (35), the refrigeration device (35) is located outside the refrigeration system (3), and a cooling chamber (34) is provided on the bottom wall of the cooling chamber (32). A connecting hole (36) is provided, and the connecting hole (36) connects the cooling chamber (32) and the refrigeration chamber (34); the top of the cooling chamber (32) is covered with a cooling cover (33), a cooling pipe (37) is embedded in the cooling cover (33), and the bottom of the cooling pipe (37) is connected to the refrigeration chamber (34); a circulation component (4) is provided between the refrigeration chamber (34) and the cooling chamber (32), and the circulation component (4) is used to circulate the cooling medium in the refrigeration chamber (34) and the cooling chamber (32).

3. An automatic benzene crystallization point measuring device according to claim 2, characterized in that: The circulation assembly (4) comprises a circulation pump (41), the circulation pump (41) being connected to a liquid inlet pipe (42) and a liquid outlet main pipe (43), one end of the liquid inlet pipe (42) being in communication with the refrigeration chamber (34), and the other end being in communication with the circulation pump (41); one end of the liquid outlet main pipe (43) being in communication with the circulation pump (41), and the other end of the liquid outlet main pipe being divided into a first branch pipe (44) and a second branch pipe (45), the end of the first branch pipe (44) being away from the liquid outlet pipe being inserted into the cooling chamber (32) and then being in communication with the cooling pipe (37), the portion of the first branch pipe (44) being located outside the cooling chamber (32) being provided with a valve (46), and the end of the second branch pipe (45) being away from the liquid outlet main pipe (43) being connected to the cooling chamber (32).

4. An automatic benzene crystallization point measuring device according to claim 3, characterized in that: The outer side of the refrigerator (31) is wrapped with a thermal insulation layer (5) made of aerogel material.

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