Low temperature test bath for petroleum product closed cup flash point test

Abstract

The utility model discloses a low temperature test bath of petroleum product closed flash point test, including air -cooled semiconductor refrigeration water bath and water -cooled semiconductor refrigeration low temperature test bath. Air -cooled semiconductor refrigeration water bath both sides are equipped with semiconductor refrigerator and cooling fan, and the other side is equipped with water inlet and outlet, water -cooled semiconductor refrigeration low temperature test bath four sides are equipped with semiconductor refrigerator subassembly and water -cooled metal block with water -flowing pipeline, and form closed loop through pipeline and air -cooled water bath, and circulating pump drives water flow. Its advantage lies in: refrigeration system is closed loop, and need not external cooling water, can directly complete negative temperature range detection, and promotes instrument grade, and sample need not precooling, and simple operation, applicable to non -laboratory environment, and convenient for on -the -spot use.

Description

Technical Field

[0001] This utility model relates to the technical field of petroleum product testing equipment, specifically a low-temperature test bath for closed-cup flash point testing of petroleum products, which is suitable for closed-cup flash point testing within a negative temperature range. Background Technology

[0002] The closed-cup flash point of petroleum products is an important indicator of their safety performance. It represents the lowest temperature at which a petroleum product will momentarily ignite upon contact with a flame under specific conditions. A closed-cup flash point tester is a specialized instrument for detecting the closed-cup flash point of petroleum products.

[0003] With economic development and technological progress, the variety of petroleum products is increasing. For some special petroleum products, the closed-cup flash point needs to be tested in the negative temperature range below zero degrees Celsius.

[0004] For testing the closed-cup flash point of such products, commonly used petroleum product closed-cup flash point testers cannot directly perform the test. The usual method is to use an existing petroleum product closed-cup flash point tester, supplemented by a refrigeration device such as a cooler or refrigerator.

[0005] The specific steps are as follows:

[0006] Place the sample of the product to be tested in the specified closed-cup sample cup, place the sample cup containing the sample in a refrigeration device, and adjust the temperature of the sample to be about 10°C below the expected closed-cup flash point.

[0007] Place the temperature-adjusted sample cup containing the sample into the test bath of the closed flash point tester, and heat the sample cup and the sample so that the sample temperature gradually increases at the specified rate.

[0008] During the gradual increase of the sample temperature, the area above the sample in the sample cup is ignited according to the specified requirements, time intervals, and size of the ignition flame.

[0009] When a flashover occurs, record the sample temperature at that moment; this temperature is the closed-cup flash point of the sample. Existing defects and shortcomings:

[0010] 1. Because the commonly used closed-cup flash point testers do not have the low-temperature conditions required for the test, they are unable to complete the test of the closed-cup flash point of petroleum product samples in the negative temperature range below zero degrees.

[0011] 2. Under the conditions of the currently common closed-cup flash point tester, the sample needs to be pre-cooled to a temperature of about 10°C below the expected flash point before being tested on the existing tester. Therefore, the laboratory must prepare the necessary refrigeration equipment in advance, which has the drawback that the test cannot be carried out without certain refrigeration equipment.

[0012] 3. Under current conditions, the laboratory needs to prepare necessary refrigeration equipment in advance to cool the sample before conducting the test using existing testing equipment. Therefore, there is a drawback that the test cannot be conducted on-site under non-laboratory conditions.

[0013] Therefore, developing a low-temperature test bath for closed-cup flash point testing of petroleum products has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0014] To address the shortcomings of existing technologies, this utility model aims to provide a low-temperature test bath for closed-cup flash point testing of petroleum products, in order to meet the testing requirements of sub-zero temperature conditions. Moreover, the test bath is compact in size, does not require external circulating cooling water, and forms its own closed-loop refrigeration system. The test apparatus composed of it is easy to move and suitable for laboratory and field use.

[0015] The above-mentioned objective of this utility model is achieved through the following technical solution: a low-temperature test bath for closed-cup flash point testing of petroleum products, comprising an air-cooled semiconductor refrigeration water bath and a water-cooled semiconductor refrigeration low-temperature test bath.

[0016] The main function of the air-cooled semiconductor refrigeration water bath is to provide the required circulating cooling water for the water-cooled semiconductor refrigeration low-temperature test bath.

[0017] The air-cooled semiconductor refrigeration water bath includes a cold water bath, which is cubic in shape and has a cylindrical water tank on the top surface. Semiconductor coolers are installed on both side walls, which directly cool the outer surface of the cold water bath to indirectly cool the water inside. Cooling fans are installed on the outside of the two semiconductor coolers to blow air and cool them. The other two side walls are respectively provided with a cold water bath inlet and a cold water bath outlet. The cold water bath is provided with a water level line.

[0018] The cold water bath inlet is located at the upper part of the cold water bath, and the cold water bath outlet is located at the lower part of the cold water bath.

[0019] The main function of the water-cooled semiconductor refrigeration low-temperature test bath is to provide a low-temperature test bath with a certain range for some petroleum product samples that need to be tested in a negative temperature range below zero degrees Celsius.

[0020] The water-cooled semiconductor refrigeration low-temperature test bath includes a test bath in the shape of a cube. The top surface is provided with a cylindrical cup groove for placing a sample cup for the closed-cup flash point test. Semiconductor refrigeration assemblies are provided on all four side walls of the test bath. Water-cooled metal blocks are provided on the outer side walls of the four semiconductor refrigeration assemblies. Each water-cooled metal block is provided with a water heat exchange pipeline and has an inlet and an outlet. The inlet is connected to the outlet of the cold water bath through a cooling water outlet main pipe. A circulation pump is connected to the cooling water outlet main pipe. The outlet is connected to the inlet of the cold water bath through a cooling water return main pipe.

[0021] Furthermore, a temperature sensor is installed on the test bath, and its transmission wire is connected to the corresponding temperature control circuit to detect the real-time temperature of the test bath and perform corresponding temperature control.

[0022] The working mode of this utility model:

[0023] This utility model includes a cold water bath and a test bath. The cold water bath is a metal-made air-cooled semiconductor refrigeration device used to generate cold water, which generates a cold water bath to provide circulating water for the latter device. The test bath is a metal-made water-cooled semiconductor refrigeration device used to generate a negative temperature test bath, which generates an air test bath under negative temperature conditions.

[0024] In an air-cooled semiconductor refrigeration water bath, a semiconductor cooler, under electrical control, cools the metal refrigeration water bath. Meanwhile, a cooling fan in the device provides air cooling to the semiconductor cooler, thereby gradually lowering the water temperature in the bath to a suitable level for experimental use.

[0025] In a water-cooled semiconductor refrigeration low-temperature test bath, the semiconductor cooler cools the metal-based air test bath under electrical control. Meanwhile, the water-cooled metal block in the device utilizes cooling water from the air-cooled semiconductor refrigeration water bath, which, driven by a circulating pump, circulates and cools the water-cooled metal block, thereby cooling the semiconductor cooler. This gradually lowers the temperature inside the air test bath until the required negative temperature for the test is reached.

[0026] The advantages of this utility model compared with the prior art are:

[0027] 1. The refrigeration unit with a low-temperature test bath forms a self-contained closed-loop cooling system, eliminating the need for external cooling water:

[0028] This invention employs two independent semiconductor cooling units. The first unit prepares circulating cooling water for the second unit, and the second unit uses this circulating cooling water to create a low-temperature test air bath. The refrigeration device with the low-temperature test bath forms a closed-loop cooling system, which has the advantage of not requiring external cooling water.

[0029] 2. It has the advantage of enhancing the technical level of instruments:

[0030] When installed in a closed-cup flash point tester, this invention can directly perform closed-cup flash point testing on petroleum product samples within a negative temperature range below zero degrees Celsius, thus enhancing the technical level of the instrument.

[0031] 3. It has the advantage of not requiring the sample to be cooled down before the test:

[0032] Because of the use of this invention, the sample can be cooled directly on the instrument, which has the advantage of not needing to cool the sample with refrigeration equipment before the test.

[0033] 4. It has the advantages of simple testing and convenient operation:

[0034] Because of the use of this invention, the closed-cup flash point test of petroleum product samples in the negative temperature range below zero degrees can be directly completed on the instrument, which has the advantages of simple test and convenient operation.

[0035] 5. It has the advantage of being able to be tested in non-laboratory environments:

[0036] Because of the use of this utility model, it has the advantage of not requiring external cooling water, and it can directly complete the test without the need for refrigeration equipment to lower the temperature of the sample in advance, which has the advantage of being able to conduct tests in non-laboratory environments. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of this utility model.

[0038] Figure 2 This is a top view of the air-cooled semiconductor refrigeration water bath of this utility model.

[0039] Figure 3 This is a side view of the air-cooled semiconductor refrigeration water bath of this utility model.

[0040] Figure 4 This is a schematic diagram of the water level in the wind-cooled semiconductor refrigeration water bath of this utility model.

[0041] Figure 5 This is a top view of the water-cooled semiconductor refrigeration low-temperature test bath of this utility model.

[0042] Figure 6 This is a side view of the water-cooled semiconductor refrigeration low-temperature test bath in this utility model.

[0043] Figure 7 This is a schematic diagram showing the connection between the water-cooled metal block and the cold water bath in this utility model.

[0044] Figure 8 This is a front view of the utility model applied to the low-temperature closed-cup flash point tester for petroleum products.

[0045] Figure 9 This is a side view of the low-temperature closed-cup flash point tester for petroleum products, which is an application of this utility model. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings.

[0047] like Figures 1 to 7 As shown, a low-temperature test bath for closed-cup flash point testing of petroleum products includes an air-cooled semiconductor refrigeration water bath 100 and a water-cooled semiconductor refrigeration low-temperature test bath 200. The main function of the air-cooled semiconductor refrigeration water bath 100 is to provide the required circulating cooling water for the water-cooled semiconductor refrigeration low-temperature test bath 200. The air-cooled semiconductor refrigeration water bath 100 includes a cold water bath 101, which is cubic in shape and has a cylindrical water tank 102 on the top surface. Semiconductor coolers 103 are provided on both side walls, which directly cool the outer surface of the cold water bath 101 to indirectly cool the water inside the cold water bath 101. Cooling fans 104 are provided on the outside of the two semiconductor coolers 103 to blow air and cool them. Cold water bath inlets 105 and cold water bath outlets 106 are provided on the other two side walls, and the cold water bath 101 has a water level line 107. The cold water bath inlet 105 is located at the upper part of the cold water bath 101, and the cold water bath outlet 106 is located at the lower part of the cold water bath 101.

[0048] The main function of the water-cooled semiconductor refrigeration low-temperature test bath 200 is to provide a low-temperature test bath with a certain range for some petroleum product samples that need to be tested in a negative temperature range below zero degrees Celsius to start detecting the closed-cup flash point. The water-cooled semiconductor refrigeration low-temperature test bath 200 includes a test bath 201, which is cubic in shape. The top surface is provided with a cylindrical cup groove 202 for placing the sample cup for the closed-cup flash point test. Semiconductor refrigeration assemblies 203 are provided on all four side walls of the test bath 201. Water-cooled metal blocks 204 are provided on the outer side walls of the four semiconductor refrigeration assemblies 203. Each water-cooled metal block 204 (as shown in a, b, c, and d in the figure) is provided with a water heat exchange pipeline and has an inlet 205 and an outlet 206. The inlet 205 is connected to the cold water bath outlet 106 through a cooling water outlet main pipe 207. A circulation pump 208 is connected to the cooling water outlet main pipe 207. The outlet 206 is connected to the cold water bath inlet 105 through a cooling water return main pipe 209. A temperature sensor 210 is installed on the test bath 201, and its transmission wire is connected to the corresponding temperature control circuit to detect the real-time temperature of the test bath 201 and perform corresponding temperature control.

[0049] like Figure 8 , Figure 9The diagram shown is a schematic of the application of this utility model to a low-temperature closed-cup flash point tester for petroleum products, wherein:

[0050] The instrument housing 301 is the main housing of the instrument. The electrical control section is on the left and the sample testing section is on the right.

[0051] The color LCD touch screen 302 is the instrument's I / O unit. The instrument is operated through the touch keys on this screen; various detection signals, input parameters, sample temperature, test process, test results, etc. are displayed on this screen.

[0052] Printer 303, a mini printer; test results can be printed using this printer.

[0053] The water-cooled semiconductor refrigeration device 304 is part of this utility model, providing a low-temperature test bath 310 for the instrument.

[0054] The air-cooled semiconductor refrigeration device 305 provides cooling water for the water-cooled semiconductor refrigeration device 304 to cool the semiconductor refrigeration devices.

[0055] Cold water bath 306, a metal outer square inner cylindrical cold water bath of air-cooled semiconductor refrigeration device 305, internally storing cooling water.

[0056] The water level line 307 for the cold water bath is the same as the water level line for the cold water bath 306. The water level of the internal cooling water should be maintained at this water level line.

[0057] The covers for cold water baths 308 and 306 are used for adding or changing cooling water, or for cleaning the cold water bath.

[0058] The cover 309 of the low-temperature test bath and the cover of the low-temperature test bath 310 are equipped with a temperature sensor 311, a flash point detection sensor 312, a sample stirrer 313, an ignition head 314 and other devices. During the test, the cover is placed on the low-temperature test bath 310.

[0059] The low-temperature test bath 310 is a metal-made, square-outer, cylindrical-inner low-temperature air test bath of a water-cooled semiconductor refrigeration device 304, in which a closed cup containing a sample is placed for testing.

[0060] Temperature sensor 311 is used to detect the temperature of the sample inside the sample cup.

[0061] The flash point sensor 312 is used to detect the flash point in the air above the sample liquid level in the sample cup.

[0062] The sample stirrer 313 is used to stir the sample in the sample cup to make the sample temperature uniform.

[0063] The ignition head 314 has an openable ignition hole at the downward ignition point of the ignition head on the low temperature test bath cover 309. When ignition is required, the ignition hole is opened, and the ignition head is turned downward to test the ignition in the air above the sample liquid level in the sample cup.

[0064] Sample cup 315 is a closed-cup flash point sample cup, with the sample level at the upper dotted line in the cup. During the test, the sample to be tested is placed in the cup according to the liquid level requirements and then placed in the low-temperature test bath 310.

[0065] The electrical control unit 316 is an electrical control unit that is developed to support this utility model. This unit mainly performs the following functions: controlling the normal operation of the air-cooled semiconductor refrigeration device 305; controlling the normal operation of the water-cooled semiconductor refrigeration device 304; and switching between the low-temperature control and sample heating modes of the low-temperature test bath 310 according to experimental requirements.

[0066] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A low-temperature test bath for closed-cup flash point testing of petroleum products, characterized in that: Including air-cooled semiconductor refrigeration water bath and water-cooled semiconductor refrigeration low-temperature test bath; The air-cooled semiconductor refrigeration water bath includes a cold water bath, wherein semiconductor coolers are provided on both side walls in close contact with the cold water bath, and cooling fans are provided on the outside of the two semiconductor coolers to cool the semiconductor coolers by blowing air. The other two side walls are respectively provided with a cold water bath inlet and a cold water bath outlet. The water-cooled semiconductor refrigeration low-temperature test bath includes a test bath, and semiconductor refrigeration assemblies are provided on all four side walls of the test bath. Water-cooled metal blocks are provided on the outer side walls of the four semiconductor refrigeration assemblies. Each water-cooled metal block has a water heat exchange pipeline inside, and has an inlet and an outlet. The inlet is connected to the outlet of the cold water bath through a cooling water outlet main pipe. A circulation pump is connected to the cooling water outlet main pipe, and the outlet is connected to the inlet of the cold water bath through a cooling water return main pipe.

2. The low-temperature test bath for closed-cup flash point testing of petroleum products according to claim 1, characterized in that: The cold water bath is cubic in shape, with a cylindrical water tank on the top surface.

3. The low-temperature test bath for closed-cup flash point testing of petroleum products according to claim 1, characterized in that: The cold water bath is equipped with a water level line.

4. The low-temperature test bath for closed-cup flash point testing of petroleum products according to claim 1, characterized in that: The cold water bath inlet is located at the upper part of the cold water bath, and the cold water bath outlet is located at the lower part of the cold water bath.

5. The low-temperature test bath for closed-cup flash point testing of petroleum products according to claim 1, characterized in that: The test bath is cubic in shape, with a cylindrical cup groove on the top surface for placing the sample cup for the closed-cup flash point test.

6. The low-temperature test bath for closed-cup flash point testing of petroleum products according to claim 1, characterized in that: The test bath is equipped with a temperature sensor, whose transmission wire is connected to the corresponding temperature control circuit to detect the real-time temperature of the test bath and perform corresponding temperature control.

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