Full-automatic condensation point tester

Abstract

The invention is suitable for the technical field of condensation point testers, and provides a full-automatic condensation point tester which comprises a tester body, a liquid supply assembly, a positioning inclination assembly and a sealing assembly are installed on the tester body, and through the arrangement of a semiconductor cooler, an air exhaust assembly, a liquid drainage assembly, a temperature monitoring unit, a visual monitoring unit and a signal transmission and conversion unit, the condensation point can be accurately measured. Firstly, moisture in the petroleum product is evaporated, interference of the moisture on a condensation point test of the petroleum product is reduced, so that the accuracy of a test result is improved, a dual heat dissipation mode of air cooling and liquid cooling is adopted, it is ensured that when the petroleum product is cooled by the semiconductor cooler, the heat of the hot end of the semiconductor cooler can be effectively dissipated, and the service life of the semiconductor cooler is prolonged. The working efficiency of the semiconductor cooler is improved, the semiconductor cooler can more quickly reduce the temperature of the petroleum product through a good heat dissipation effect, so that the cooling time is shortened, the efficiency of the condensation point test of the petroleum product is improved through the overall design, and the test process is more accurate and efficient.

Description

Technical Field

[0001] The invention belongs to the technical field of freezing point testers, and in particular relates to a full-automatic freezing point tester. Background Art

[0002] The pour point is a key indicator for measuring the low-temperature performance of liquid petroleum products. It refers to the highest temperature of a sample when it is cooled to the point where the liquid surface stops moving under specified conditions. The pour point tester is an instrument specifically used to measure the pour point of petroleum products (such as lubricating oil, fuel oil, transformer oil, etc.). This indicator is widely used in the quality control of diesel, biodiesel blended fuels and lubricating oils, providing key data for evaluating product performance in low-temperature environments, ensuring product quality, guiding equipment oil use, and product research and development.

[0003] Existing technology cools petroleum products to observe their flow and thus determine their freezing point. However, since petroleum products may contain water impurities, the accuracy of the freezing point test is affected. The freezing point tester uses semiconductor refrigeration, and the heat dissipation at the hot end of the semiconductor refrigeration device is mostly done by fans. The heat dissipation of fans has limitations, and poor heat dissipation affects the cooling effect of the cold end. Summary of the Invention

[0004] The purpose of the present invention is to provide a fully automatic freezing point tester, which aims to solve the problem that the existing technology cools petroleum products to observe the flow of petroleum and thus judge the freezing point of petroleum products. Since petroleum products may contain water impurities, the accuracy of the freezing point test of petroleum products is affected. The freezing point tester uses semiconductor refrigeration. When semiconductor refrigeration is used, its hot end mostly dissipates heat through a fan. The heat dissipation of the fan has limitations, and poor heat dissipation affects the cooling effect of the cold end.

[0005] The present invention is achieved in that a fully automatic freezing point tester comprises: A tester body, on which a liquid supply assembly, a positioning and tilting assembly, and a sealing assembly are installed; The tester body is provided with a placement hole and a condensation groove for placing the petroleum product test tube; The semiconductor cooler is fixedly mounted on the tester body, and a heat conducting column is fixedly mounted on one end of the semiconductor cooler; An exhaust assembly is provided on the tester body near the semiconductor cooler and is used to cool the semiconductor cooler with air; The liquid drain assembly is provided on the tester body near the exhaust assembly and is used to liquid cool the semiconductor cooler. The liquid drain assembly includes: Liquid storage tank, fixedly installed in the tester body; The liquid discharge pump is fixedly mounted on the end surface of the liquid storage tank, with its liquid inlet end connected to the liquid storage tank and a liquid discharge pipe fixedly mounted on its liquid outlet end; A heat sink is fixedly mounted on the drain pipe, a water cooling unit is fixedly mounted on the end surface of the drain pipe, and the water cooling unit is communicated with the liquid storage tank.

[0006] As a further solution of the present invention, the drainage pipe consists of a drainage section pipe, a winding section pipe and a condensation section pipe. The winding section pipe is fixedly installed on the heat-conducting column to absorb heat from the heat-conducting column. Several heat sinks are fixedly installed on the condensation section pipe to dissipate heat from the condensate.

[0007] As a further embodiment of the present invention, the present invention further comprises: The temperature monitoring unit is used to monitor the temperature of the petroleum product in the test tube in real time and obtain the specific temperature at different time periods during the test; Visual monitoring unit, used to monitor and determine the pour point of petroleum products in the test tube; The signal transmission and conversion unit is used to transmit the information monitored by the temperature monitoring unit and the visual detection unit and convert it into electrical signals to drive other components to work.

[0008] As a further solution of the present invention, the exhaust assembly is a high-power exhaust motor, an exhaust fan is fixedly mounted on the output shaft of the high-power exhaust motor, and the free end of the semiconductor cooler is arranged in the condensation tank of the tester body.

[0009] As a further solution of the present invention, the liquid supply component is used to discharge coolant or extract coolant from the condensate tank, and the liquid supply component includes: The liquid supply tank is fixedly installed on the end face of the tester body and is used to store the coolant; A liquid supply pump is fixedly mounted on the liquid supply tank, wherein a liquid inlet three-way valve is fixedly mounted on the liquid inlet end of the liquid supply pump, and a liquid outlet three-way valve is fixedly mounted on the liquid outlet end of the liquid supply pump; The liquid inlet three-way valve is fixedly installed in the tester body, and the first liquid inlet pipe and the second liquid inlet pipe are fixedly installed on the liquid inlet three-way valve; The first liquid inlet pipe is connected to the liquid supply tank, and the second liquid inlet pipe is connected to the condensate tank; The liquid outlet three-way valve is fixedly installed in the tester body near the upper end of the liquid inlet three-way valve, and the first liquid outlet pipe and the second liquid outlet pipe are fixedly installed on the liquid outlet three-way valve; The first liquid outlet pipe is communicated with the condensation tank, and the second liquid outlet pipe is communicated with the liquid supply tank.

[0010] As a further solution of the present invention, the liquid supply tank, the first liquid inlet pipe, the liquid inlet three-way valve, the liquid supply pump, the liquid outlet three-way valve and the first liquid outlet pipe constitute a first flow path for the coolant, and the condensation tank, the second liquid inlet pipe, the liquid inlet three-way valve, the liquid supply pump, the liquid outlet three-way valve and the second liquid outlet pipe constitute a second flow path for the coolant.

[0011] As a further embodiment of the present invention, the positioning and tilting assembly is used to position and tilt a petroleum product test pipe, and the positioning and tilting assembly includes: The swing motor is fixedly mounted on the tester body near the condensate tank; Positioning mechanism, both of the positioning mechanisms are rotatably matched with the tester body, and one of the two positioning mechanisms is fixedly mounted on the output shaft of the swing motor.

[0012] As a further solution of the present invention, the positioning mechanism includes: Positioning posts, both of which are rotatably engaged with the tester body, and one of the positioning posts is connected to the output shaft of the swing motor; Positioning springs, with positioning springs fixedly installed inside the two positioning columns; Positioning rods, the end surfaces of the two positioning springs are fixedly mounted with positioning rods, and the positioning rods are also slidably matched with the positioning columns to position the test tubes for petroleum products; Positioning clamps, the shaft ends of the two positioning rods are fixedly mounted with positioning clamps for clamping the test tubes of petroleum products; Positioning pulley, both positioning clamps are rotatably matched with positioning pulleys.

[0013] As a further embodiment of the present invention, the sealing assembly is used to seal the nozzle of a petroleum product test tube, and the sealing assembly includes: Support base, fixedly installed on the tester body; The telescopic rod is fixedly mounted in a fixing groove provided in the support base, and a fixing base is fixedly mounted on the output shaft of the telescopic rod, and a vent hole is provided on the fixing base; The air pump structure is fixedly installed in a fixing groove provided in the fixing base; A hose is fixedly mounted on the air pump structure and is movably engaged with the fixing seat; The sealing cover is fixedly mounted on the end face of the hose, and a pressure one-way valve is provided on the sealing cover.

[0014] As a further solution of the present invention, an exhaust duct is opened inside the tester body near the other side of the semiconductor cooler, and a console is fixedly installed on the tester body, and an operation panel is installed on the console. An air inlet filter is clamped on one side of the tester body, and an air outlet filter is clamped on the side of the tester body near the air outlet of the exhaust duct.

[0015] The present invention provides a fully automatic freezing point tester, which achieves the following goals through the arrangement of a semiconductor refrigerator, an exhaust component, a liquid discharge component, a temperature monitoring unit, a visual monitoring unit and a signal transmission conversion unit. First, the moisture in the petroleum product is evaporated to reduce the interference of moisture on the freezing point test of the petroleum product, thereby improving the accuracy of the test results. A dual heat dissipation method of air cooling and liquid cooling is adopted to ensure that the hot end of the semiconductor refrigerator can effectively dissipate heat when cooling the petroleum product, thereby improving the working efficiency of the semiconductor refrigerator. Through the good heat dissipation effect, the semiconductor refrigerator can reduce the temperature of the petroleum product more quickly, thereby shortening the cooling time. The overall design improves the efficiency of the freezing point test of the petroleum product, making the testing process more accurate and efficient.

[0016] The present invention provides a fully automatic freezing point tester, which realizes the delivery of condensate to a condensate tank after heat treatment of petroleum products through the setting of a liquid supply component, and uses a semiconductor refrigerator to continuously cool the condensate, thereby effectively absorbing the heat of the petroleum products. The cooling effect of the semiconductor refrigerator effectively cools the petroleum products to ensure temperature control during the test process. After the test is completed, the condensate can be recycled to ensure efficient utilization of resources and reduce waste.

[0017] The present invention provides a fully automatic freezing point tester, which realizes the change of temperature of the petroleum product through the arrangement of a temperature monitoring unit, a visual monitoring unit, a signal transmission conversion unit and a positioning and tilting component. The swing motor automatically adjusts the frequency of the swing of the test tube through the positioning mechanism. The closer the temperature of the petroleum product is to the freezing point, the smaller the interval of the swing time of the test tube will be, thereby accurately testing the freezing point of the petroleum product.

[0018] The present invention provides a fully automatic freezing point tester, which achieves sealing of a test tube by setting a sealing component and simultaneously reduces the pressure of the test tube. By reducing the pressure, the time for water evaporation is shortened, thereby accelerating the process of removing water impurities in petroleum products. The freezing point test of petroleum products can be performed more accurately, errors are reduced, and the accuracy of the test results is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional schematic diagram of one direction of a fully automatic freezing point tester provided by an embodiment of the present invention; Figure 2 A three-dimensional schematic diagram of another direction of a fully automatic freezing point tester provided by an embodiment of the present invention; Figure 3 An internal structure diagram of a fully automatic freezing point tester provided by an embodiment of the present invention; Figure 4 A partial structural diagram of a liquid discharge component of a fully automatic freezing point tester provided by an embodiment of the present invention; Figure 5 A partial structural diagram of a liquid supply component of a fully automatic freezing point tester provided in an embodiment of the present invention; Figure 6 A partial structural diagram of a positioning and tilting component of a fully automatic freezing point tester provided by an embodiment of the present invention; Figure 7 A fully automatic freezing point tester provided by the embodiment of the present invention Figure 6 Enlarged view of point A in the middle; Figure 8 This is a partial structural diagram of the sealing component of a fully automatic freezing point tester provided by an embodiment of the present invention.

[0020] In the attached figure: 1. Tester body; 11. Placement hole; 12. Condensate tank; 13. Exhaust pipe; 14. Control console; 15. Air inlet filter; 16. Air outlet filter; 2. Semiconductor refrigerator; 21. Heat conducting column; 3. Exhaust assembly; 4. Drain assembly; 41. Liquid storage tank; 42. Drain pump; 43. Drain pipe; 44. Heat sink; 45. Water cooling unit; 5. Liquid supply assembly; 51. Liquid supply tank; 52. Liquid supply pump; 53. Liquid inlet three-way valve; 531. A liquid inlet pipe; 532, a second liquid inlet pipe; 54, a liquid outlet three-way valve; 541, a first liquid outlet pipe; 542, a second liquid outlet pipe; 6, a positioning tilting assembly; 61, a swing motor; 62, a positioning mechanism; 621, a positioning column; 622, a positioning spring; 623, a positioning rod; 624, a positioning clamp; 625, a positioning pulley; 7, a sealing assembly; 71, a support seat; 72, a telescopic rod; 73, a fixing seat; 74, an air pump structure; 75, a hose; 76, a sealing cover. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] It will be understood that the terms "first" and "second" used in this application may be used herein to describe various elements, but unless otherwise specified, these elements are not limited by these terms. These terms are only used to distinguish a first element from another element.

[0023] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0024] like Figures 1 to 8 As shown, a fully automatic freezing point tester provided by one embodiment of the present invention includes: The tester body 1 is provided with a liquid supply assembly 5, a positioning and tilting assembly 6, and a sealing assembly 7; The tester body 1 is provided with a placement hole 11 and a condensation groove 12 for placing the petroleum product test tube; The semiconductor cooler 2 is fixedly mounted on the tester body 1, and a heat conducting column 21 is fixedly mounted on one end thereof; The exhaust assembly 3 is provided on the tester body 1 near the semiconductor cooler 2 and is used to cool the semiconductor cooler 2 with air; The drain assembly 4 is provided on the tester body 1 near the exhaust assembly 3 and is used to liquid-cool the semiconductor cooler 2. The drain assembly 4 includes: The liquid storage tank 41 is fixedly installed in the tester body 1; A liquid discharge pump 42 is fixedly mounted on the end surface of the liquid storage tank 41, with its liquid inlet end communicating with the liquid storage tank 41 and a liquid discharge pipe 43 fixedly mounted on its liquid outlet end; A heat sink 44 is fixedly mounted on the drain pipe 43 , and a water cooling unit 45 is fixedly mounted on the end surface of the drain pipe 43 , and the water cooling unit 45 is connected to the liquid storage tank 41 ; Specifically, as a further embodiment of the present invention, the drain pipe 43 is composed of a drain section pipe, a winding section pipe, and a condensation section pipe. The winding section pipe is fixedly mounted on the heat-conducting column 21 to absorb heat from the heat-conducting column 21. A plurality of heat sinks 44 are fixedly mounted on the condensation section pipe to dissipate heat from the condensate. Specifically, as a further embodiment of the present invention, it also includes: The temperature monitoring unit is used to monitor the temperature of the petroleum product in the test tube in real time and obtain the specific temperature at different time periods during the test; Visual monitoring unit, used to monitor and determine the pour point of petroleum products in the test tube; The signal transmission and conversion unit is used to transmit the information monitored by the temperature monitoring unit and the visual detection unit and convert it into electrical signals to drive other components to work; In an embodiment of the present invention, during actual use, petroleum product is poured into a test tube, which is then inserted into the condensate groove 12 of the tester body 1 through the placement hole 11. The positioning tilting assembly 6 and the sealing assembly 7 respectively clamp, position, and seal the test tube. When the semiconductor cooler 2 is energized, the end surface in contact with the test tube generates heat, evaporating moisture impurities in the petroleum product in the test tube to reduce the impact on the freezing point monitoring of the petroleum product. After the moisture evaporates, the liquid supply assembly 5 delivers coolant to the condensate groove 12. At this time, the semiconductor cooler 2 is energized again, and the end surface in contact with the test tube is in a heat-absorbing state. The heat-conducting column 21 accelerates the dissipation of heat from the heat-releasing end of the semiconductor cooler 2. The exhaust assembly 3 accelerates air flow to cool the hot end of the semiconductor cooler 2. The drainage pump 42 circulates the liquid in the liquid storage tank 41 through the drainage pipe 43 and the water-cooling unit 45. The winding section of the drainage pipe 43 absorbs heat from the heat-conducting column 21, further controlling the temperature of the hot end of the semiconductor cooler 2. The heat sink 44 on the condensing section of the drainage pipe 43 is cooled by the exhaust air. The air cooling effect of component 3 promotes the dissipation of heat from the liquid after absorbing heat. The heat-absorbing liquid is then cooled by the water-cooling unit 45 and returned to the liquid storage tank 41. The circulation of the low-temperature cooling liquid has a better cooling effect on the coolant in the condensate tank 12, so that the petroleum product in the test tube is continuously cooled. The temperature monitoring unit monitors the temperature of the petroleum product in the test tube in real time. The signal transmission and conversion unit converts and transmits the data of the petroleum product monitoring. Every time the temperature of the petroleum product decreases by five degrees, the positioning and tilting component 6 drives the test tube to rotate forty-five degrees. At the same time, the visual monitoring unit monitors whether the petroleum product in the test tube is in a solidified state. As the temperature of the petroleum product gradually decreases, the positioning and tilting component 6 drives the test tube to rotate for every five degrees of decrease in the petroleum product, then for every three degrees of decrease, and then for every one degree of decrease. In this way, the state of the petroleum product in the test tube at different temperatures is recorded. When the visual monitoring unit detects that the petroleum is not flowing and is in a solidified state, the tester body 1 records the temperature of the petroleum product at this time, which is the freezing point of the petroleum product.

[0025] The following objectives are achieved through the arrangement of a semiconductor refrigerator 2, an exhaust component 3, a drain component 4, a temperature monitoring unit, a visual monitoring unit, and a signal transmission conversion unit. First, the moisture in the petroleum product is evaporated to reduce the interference of moisture on the freezing point test of the petroleum product, thereby improving the accuracy of the test results. A dual heat dissipation method of air cooling and liquid cooling is adopted to ensure that when the semiconductor refrigerator 2 cools the petroleum product, the hot end of the semiconductor refrigerator 2 can effectively dissipate heat, thereby improving the working efficiency of the semiconductor refrigerator 2. Through good heat dissipation effect, the semiconductor refrigerator 2 can reduce the temperature of the petroleum product more quickly, thereby shortening the cooling time. The overall design improves the efficiency of the freezing point test of the petroleum product, making the testing process more accurate and efficient.

[0026] like Figures 1 to 8As shown, as a further embodiment of the present invention, the exhaust assembly 3 is a high-power exhaust motor, an exhaust fan is fixedly mounted on the output shaft of the high-power exhaust motor, and the free end of the semiconductor cooler 2 is arranged in the condensation tank 12 of the tester body 1; In the embodiment of the present invention, in actual application, a high-power motor drives the exhaust fan to rotate faster, thereby increasing the speed of air flow and improving the efficiency of heat dissipation at the hot end of the semiconductor cooler 2.

[0027] like Figures 1 to 8 As shown in FIG. 1 , as a further embodiment of the present invention, the liquid supply component 5 is used to discharge or extract coolant from the condensate tank 12. The liquid supply component 5 includes: The liquid supply tank 51 is fixedly mounted on the end surface of the tester body 1 and is used to store the coolant; A liquid supply pump 52 is fixedly mounted on the liquid supply tank 51. A liquid inlet three-way valve 53 is fixedly mounted on the liquid inlet end of the liquid supply pump 52, and a liquid outlet three-way valve 54 is fixedly mounted on the liquid outlet end of the liquid supply pump 52. The liquid inlet three-way valve 53 is fixedly installed in the tester body 1, and a first liquid inlet pipe 531 and a second liquid inlet pipe 532 are fixedly installed on the liquid inlet three-way valve 53; The first liquid inlet pipe 531 is connected to the liquid supply tank 51, and the second liquid inlet pipe 532 is connected to the condensation tank 12; The liquid outlet three-way valve 54 is fixedly installed in the tester body 1 near the upper end of the liquid inlet three-way valve 53. A first liquid outlet pipe 541 and a second liquid outlet pipe 542 are fixedly installed on the liquid outlet three-way valve 54. The first liquid outlet pipe 541 is connected to the condensation tank 12, and the second liquid outlet pipe 542 is connected to the liquid supply tank 51; Specifically, as a further embodiment of the present invention, the liquid supply tank 51, the first liquid inlet pipe 531, the liquid inlet three-way valve 53, the liquid supply pump 52, the liquid outlet three-way valve 54 and the first liquid outlet pipe 541 constitute a first flow path for the coolant, and the condensate tank 12, the second liquid inlet pipe 532, the liquid inlet three-way valve 53, the liquid supply pump 52, the liquid outlet three-way valve 54 and the second liquid outlet pipe 542 constitute a second flow path for the coolant; In the embodiment of the present invention, in actual application, after the water in the petroleum product in the test tube is evaporated, the liquid supply pump 52 discharges the condensate in the liquid supply tank 51 into the condensation tank 12 through the first liquid inlet pipe 531, the liquid inlet three-way valve 53, the liquid outlet three-way valve 54 and the first liquid outlet pipe 541, and then cools the condensate through the semiconductor refrigerator 2, thereby testing the freezing point of the petroleum product. After the freezing point test of the petroleum product is completed, the liquid supply pump 52 transports the condensate in the condensation tank 12 to the liquid supply tank 51 through the second liquid inlet pipe 532, the liquid inlet three-way valve 53, the liquid outlet three-way valve 54 and the second liquid outlet pipe 542, thereby automatically completing the discharge and recovery of the condensate.

[0028] By setting up the liquid supply component 5, the condensate is transported to the condensation tank 12 after the heat treatment of the petroleum product, and the condensate is continuously cooled by the semiconductor refrigerator 2, thereby effectively absorbing the heat of the petroleum product. The petroleum product is effectively cooled by the cooling effect of the semiconductor refrigerator 2 to ensure temperature control during the test process. After the test is completed, the condensate can be recycled to ensure efficient use of resources and reduce waste.

[0029] like Figures 1 to 8 As shown, as a further embodiment of the present invention, the positioning and tilting assembly 6 is used to position and tilt the petroleum product test pipe, and the positioning and tilting assembly 6 includes: The swing motor 61 is fixedly mounted on the tester body 1 near the condensation tank 12; Positioning mechanisms 62 , both of which are rotatably coupled to the tester body 1 , with one of the two positioning mechanisms 62 being fixedly mounted on the output shaft of the swing motor 61 ; Specifically, as a further embodiment of the present invention, the positioning mechanism 62 includes: Positioning posts 621 , both of which are rotatably engaged with the tester body 1 , with one of the positioning posts 621 being connected to the output shaft of the swing motor 61 ; Positioning spring 622, a positioning spring 622 is fixedly installed inside the two positioning columns 621; Positioning rods 623 are fixedly mounted on the end surfaces of the two positioning springs 622. The positioning rods 623 also slide in conjunction with the positioning posts 621 to position the test tube for petroleum products. Positioning clamps 624 are fixedly mounted on the shaft ends of the two positioning rods 623 to clamp the test tubes of petroleum products; Positioning pulley 625, both positioning clamps 624 are rotatably matched with positioning pulley 625, used to move the petroleum product test tube when it is placed; In the embodiment of the present invention, in actual application, when the test tube is inserted into the condensation tank 12 through the placement hole 11, the outer wall of the test tube is moved by the positioning pulley 625 to reduce the friction resistance when the test tube is inserted. At the same time, the positioning spring 622 applies a force to the positioning rod 623, so that the positioning clamp 624 clamps and positions the outer wall of the test tube. When testing the freezing point of the petroleum product, as the temperature of the petroleum product decreases, the swing motor 61 starts to drive the positioning mechanism 62 through an electrical signal, driving the test tube to rotate, thereby facilitating the observation of the petroleum product in the test tube. As the temperature of the petroleum product gradually decreases, the frequency of the swing motor 61 driving the test tube to rotate through the positioning mechanism 62 is higher, thereby increasing the accuracy of the freezing point test of the petroleum product.

[0030] By setting up the temperature monitoring unit, the visual monitoring unit, the signal transmission conversion unit and the positioning and tilting component 6, the swing motor 61 will automatically adjust the frequency of the swing of the test tube through the positioning mechanism 62 according to the change of the temperature of the petroleum product. The closer the temperature of the petroleum product is to the freezing point, the smaller the interval of the swing time of the test tube will be, thereby accurately testing the freezing point of the petroleum product.

[0031] like Figures 1 to 8 As shown, as a further embodiment of the present invention, the sealing assembly 7 is used to seal the pipe opening of the petroleum product test pipe, and the sealing assembly 7 includes: The support base 71 is fixedly mounted on the tester body 1; The telescopic rod 72 is fixedly mounted in a fixing groove provided in the support base 71. A fixing base 73 is fixedly mounted on the output shaft of the telescopic rod 72. A vent hole is provided on the fixing base 73. The air pump structure 74 is fixedly mounted in a fixing groove provided in the fixing base 73; The hose 75 is fixedly mounted on the air pump structure 74 and is also movably engaged with the fixing base 73; A sealing cover 76 is fixedly mounted on the end surface of the hose 75 and is provided with a pressure check valve; In the embodiment of the present invention, in actual application, the telescopic rod 72 is activated to move the fixing seat 73, and the sealing cover 76 is synchronously moved to seal the tube mouth of the test tube. Then, the air pump structure 74 is activated to extract the air inside the test tube through the hose 75, so that the inside of the test tube is in a low-pressure state, which quickly evaporates the water in the petroleum product in the test tube. The evaporated water vapor will be discharged through the pressure check valve, further improving the efficiency of the freezing point test of the petroleum product.

[0032] By setting the sealing component 7, the test tube is sealed and the pressure of the test tube is reduced at the same time. By reducing the pressure, the time for water evaporation is shortened, thereby accelerating the process of removing water impurities in the petroleum product, and being able to more accurately test the freezing point of the petroleum product, reduce errors, and ensure the accuracy of the test results.

[0033] like Figures 1 to 8 As shown, as a further embodiment of the present invention, an exhaust duct 13 is provided inside the tester body 1 on the other side near the semiconductor cooler 2, a console 14 is fixedly mounted on the tester body 1, an operation panel is mounted on the console 14, an air inlet filter 15 is clamped on one side of the tester body 1, and an air outlet filter 16 is clamped on the side of the tester body 1 near the air outlet of the exhaust duct 13; In an embodiment of the present invention, in actual application, the start and stop of the tester body 1 can be controlled by the operation panel on the console 14, the exhaust duct 13 can discharge the air that has undergone heat exchange with the heat-conducting column 21 to avoid the accumulation of hot air in the tester body 1, and the air inlet filter 15 and the air outlet filter 16 filter out dust and particulate matter.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fully automatic freezing point tester, characterized in that: include: A tester body (1), wherein a liquid supply assembly (5), a positioning tilting assembly (6) and a sealing assembly (7) are mounted on the tester body (1); The tester body (1) is provided with a placement hole (11) and a condensation groove (12) for placing the petroleum product test tube; A semiconductor cooler (2) is fixedly mounted on the tester body (1), and a heat conducting column (21) is fixedly mounted on one end of the semiconductor cooler; An exhaust assembly (3) is provided on the tester body (1) near a side of the semiconductor cooler (2) and is used to air-cool the semiconductor cooler (2); A liquid drain assembly (4) is provided on the tester body (1) near the exhaust assembly (3) and is used for liquid cooling the semiconductor refrigerator (2). The liquid drain assembly (4) includes: A liquid storage tank (41) is fixedly mounted in the tester body (1); A liquid discharge pump (42) is fixedly mounted on the end surface of the liquid storage tank (41), with its liquid inlet end being in communication with the liquid storage tank (41) and a liquid discharge pipe (43) being fixedly mounted on its liquid outlet end; A heat sink (44) is fixedly mounted on the drain pipe (43), and a water cooling unit (45) is fixedly mounted on the end surface of the drain pipe (43). The water cooling unit (45) is in communication with the liquid storage tank (41).

2. A fully automatic freezing point tester according to claim 1, characterized in that: The drain pipe (43) is composed of a drain section pipe, a winding section pipe, and a condensation section pipe. The winding section pipe is fixedly mounted on the heat-conducting column (21) and is used to absorb heat from the heat-conducting column (21). A plurality of heat sinks (44) are fixedly mounted on the condensation section pipe and are used to dissipate heat from the condensate.

3. A fully automatic freezing point tester according to claim 1, characterized in that: Also includes: The temperature monitoring unit is used to monitor the temperature of the petroleum product in the test tube in real time and obtain the specific temperature at different time periods during the test; Visual monitoring unit, used to monitor and determine the pour point of petroleum products in the test tube; The signal transmission and conversion unit is used to transmit the information monitored by the temperature monitoring unit and the visual detection unit and convert it into electrical signals to drive other components to work.

4. A fully automatic freezing point tester according to claim 1, characterized in that: The exhaust assembly (3) is a high-power exhaust motor, an exhaust fan is fixedly mounted on the output shaft of the high-power exhaust motor, and the free end of the semiconductor cooler (2) is arranged in the condensation tank (12) of the tester body (1).

5. A fully automatic freezing point tester according to claim 1, characterized in that: The liquid supply component (5) is used to discharge coolant from or extract coolant from the condensate tank (12), and the liquid supply component (5) comprises: A liquid supply tank (51) is fixedly mounted on the end surface of the tester body (1) and is used to store the coolant; A liquid supply pump (52) is fixedly mounted on the liquid supply tank (51), a liquid inlet three-way valve (53) is fixedly mounted on the liquid inlet end of the liquid supply pump (52), and a liquid outlet three-way valve (54) is fixedly mounted on the liquid outlet end of the liquid supply pump (52); The liquid inlet three-way valve (53) is fixedly installed in the tester body (1), and a first liquid inlet pipe (531) and a second liquid inlet pipe (532) are fixedly installed on the liquid inlet three-way valve (53); The first liquid inlet pipe (531) is in communication with the liquid supply tank (51), and the second liquid inlet pipe (532) is in communication with the condensation tank (12); The liquid outlet three-way valve (54) is fixedly installed in the tester body (1) near the upper end of the liquid inlet three-way valve (53), and a first liquid outlet pipe (541) and a second liquid outlet pipe (542) are fixedly installed on the liquid outlet three-way valve (54); The first liquid outlet pipe (541) is in communication with the condensation tank (12), and the second liquid outlet pipe (542) is in communication with the liquid supply tank (51).

6. A fully automatic freezing point tester according to claim 5, characterized in that: The liquid supply tank (51), the first liquid inlet pipe (531), the liquid inlet three-way valve (53), the liquid supply pump (52), the liquid outlet three-way valve (54) and the first liquid outlet pipe (541) constitute a first flow path for the coolant, and the condensation tank (12), the second liquid inlet pipe (532), the liquid inlet three-way valve (53), the liquid supply pump (52), the liquid outlet three-way valve (54) and the second liquid outlet pipe (542) constitute a second flow path for the coolant.

7. A fully automatic freezing point tester according to claim 1, characterized in that: The positioning and tilting assembly (6) is used to position and tilt a petroleum product test pipe, and the positioning and tilting assembly (6) comprises: A swing motor (61) is fixedly mounted on the tester body (1) on a side close to the condensation tank (12); Positioning mechanisms (62), both of the positioning mechanisms (62) are rotatably matched with the tester body (1), and one of the two positioning mechanisms (62) is fixedly mounted on the output shaft of the swing motor (61).

8. A fully automatic freezing point tester according to claim 7, characterized in that: The positioning mechanism (62) comprises: Positioning posts (621), both of the positioning posts (621) are rotatably engaged with the tester body (1), and one of the positioning posts (621) is connected to the output shaft of the swing motor (61); Positioning springs (622), with positioning springs (622) fixedly installed inside the two positioning columns (621); Positioning rods (623), the end surfaces of the two positioning springs (622) are fixedly mounted with positioning rods (623), and the positioning rods (623) are also slidably matched with the positioning columns (621) for positioning the test tube of the petroleum product; Positioning clamps (624), the shaft ends of the two positioning rods (623) are fixedly mounted with positioning clamps (624), used for clamping the test tube of the petroleum product; A positioning pulley (625) is rotatably coupled to each of the two positioning clamps (624).

9. A fully automatic freezing point tester according to claim 1, characterized in that: The sealing assembly (7) is used to seal the pipe opening of a petroleum product test pipe, and the sealing assembly (7) comprises: A support base (71) is fixedly mounted on the tester body (1); The telescopic rod (72) is fixedly mounted in a fixing groove provided in the support seat (71); a fixing seat (73) is fixedly mounted on the output shaft of the telescopic rod (72); and a vent hole is provided on the fixing seat (73); The air pump structure (74) is fixedly mounted in a fixing groove provided in the fixing seat (73); A hose (75) is fixedly mounted on the air pump structure (74), and the hose (75) is also movably matched with the fixing seat (73); The sealing cover (76) is fixedly mounted on the end surface of the hose (75), and a pressure check valve is provided on the sealing cover (76).

10. The fully automatic freezing point tester according to claim 1, characterized in that: An exhaust duct (13) is provided inside the tester body (1) on the other side close to the semiconductor cooler (2), a console (14) is fixedly mounted on the tester body (1), an operation panel is mounted on the console (14), an air inlet filter (15) is clamped on one side of the tester body (1), and an air outlet filter (16) is clamped on one side of the tester body (1) close to the air outlet of the exhaust duct (13).

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