CN219512234U

CN219512234U - Equipment for testing high-voltage compatibility

Info

Publication number: CN219512234U
Application number: CN202320081641.9U
Authority: CN
Inventors: 祝辰杰
Original assignee: SHRIEVE CHEMICAL (SHANGHAI) Ltd
Current assignee: SHRIEVE CHEMICAL (SHANGHAI) Ltd
Priority date: 2023-01-11
Filing date: 2023-01-11
Publication date: 2023-08-11
Anticipated expiration: 2033-01-11

Abstract

The utility model relates to equipment for testing high-pressure compatibility, which relates to the field of refrigeration compressor lubricating oil testing, and comprises an environment test box, a container, a high-pressure pump, a refrigerating oil storage tank, a refrigerant storage tank, a temperature detection unit and a turbidity detection unit, wherein a heating device and a cooling device are arranged in the environment test box, the container is arranged in the environment test box and is used for containing a testing medium, an inlet of the high-pressure pump is respectively connected with the refrigerating oil storage tank and the refrigerant storage tank, an outlet of the high-pressure pump is connected with the container, the turbidity detection unit is used for detecting the turbidity of the testing medium, and the temperature detection unit is used for detecting the temperature of the testing medium. The utility model realizes the adjustment of different concentration ratios by adding the refrigerating oil and the refrigerant through adding the high-pressure pump, is simultaneously suitable for testing the azeotropic refrigerant and the non-azeotropic refrigerant, and has high testing accuracy.

Description

Equipment for testing high-voltage compatibility

Technical Field

The utility model relates to the field of refrigeration compressor lubricating oil testing, in particular to equipment for testing high-pressure compatibility.

Background

A testing device for testing the refrigerating oil and the refrigerant is disclosed in the petrochemical industry standard SH/T0699-2000 refrigerating machine oil and refrigerant compatibility test method in China.

The specific test equipment comprises a needle valve, a pressure-resistant hose, a thermometer, a test tube, a cooling bath, a T-shaped connector, a vacuum pump and a refrigerant container, wherein the test tube is placed in the cooling bath, one end of the pressure-resistant hose is respectively connected with the vacuum pump and the refrigerant container, the other end of the pressure-resistant hose is connected with the test tube through the needle valve and the T-shaped connector in sequence, the thermometer is inserted into the test tube to measure the temperature of a test medium in the test tube, during test, test oil is firstly placed in the test tube according to weight, then the T-shaped connector, the needle valve, the pressure-resistant hose, the thermometer and the like are assembled, the vacuum pump is used for pumping air to the test tube, the refrigerant container is used for adding the refrigerant into the test tube, and the quantity of the refrigerant is controlled to increase the quantity of the refrigerant to test oil and the refrigerant with different proportions.

The equipment can only change the proportion of oil and refrigerant by adding refrigerant, test the compatibility of different concentrations, adjust the proportion to be 5% proportion, discharge refrigerant to be 10% proportion, and so on. However, in the case of non-azeotropic refrigerants, the refrigerant composition is changed by discharging the refrigerant, thereby causing a large error in the test result.

Disclosure of Invention

In order to solve the problem that the refrigerant composition is changed by discharging the refrigerant when the refrigerant is not azeotropy, so that a large error is caused to a test result, the utility model provides equipment for testing high-pressure compatibility.

The utility model provides equipment for testing high-voltage compatibility, which adopts the following technical scheme:

the utility model provides a test high pressure compatibility's equipment, includes environment test case, container, high-pressure pump, frozen oil storage tank, refrigerant storage tank, temperature detection unit and turbidity detection unit, be equipped with heating device and cooling device in the environment test case, the container is located the environment test incasement and is used for holding test medium, the entry of high-pressure pump is connected with frozen oil storage tank and refrigerant storage tank respectively, and the export is connected with the container, turbidity detection unit is used for detecting test medium's turbidity, temperature detection unit is used for detecting test medium's temperature.

Through adopting above-mentioned technical scheme, the engine oil in the frozen oil storage tank and the refrigerant in the refrigerant storage tank can be successively in the injection container through the high-pressure pump, and heating device and cooling device heat and cool down environment test case 1 in order to be used for controlling the temperature range of environment test case, make it can satisfy the test requirement. By arranging the high-pressure pump, the freezing oil and the refrigerant can be injected into the container, and the pressure in the container cannot be too high to be injected, so that the container can be prepared into different concentration ratios, and the test is completed. The device can be simultaneously suitable for testing azeotropic and non-azeotropic refrigerants, and when the non-azeotropic refrigerant is used, the refrigerant component is not changed by adding the refrigerant instead of discharging the refrigerant, so that larger errors on the testing result are avoided, and the testing accuracy is improved.

Optionally, the container includes flange, cavity barrel and lower flange, the upper flange can be dismantled with the upper end of cavity barrel and be connected, lower flange can be dismantled with the lower extreme of cavity barrel and be connected.

Through adopting above-mentioned technical scheme, this kind of fastening structure can be taken apart and wash respectively, and hollow barrel does not have sanitary dead angle, washs conveniently, can guarantee better that there is not residual oil.

Optionally, the hollow cylinder is a quartz glass tube.

By adopting the technical scheme, the upper limit of the test pressure can be increased from 1.5Mpa to 8Mpa by the quartz glass tube.

Optionally, the upper flange and the lower flange are locked by bolts, and the hollow cylinder is clamped between the upper flange and the lower flange.

By adopting the technical scheme, the fastening structure can not damage the structure of the quartz glass tube, thereby prolonging the service life and improving the performance of the quartz glass tube.

Optionally, the high-pressure pump is connected with the container through a first pipeline, and a mass flowmeter and a pressure gauge are arranged on the first pipeline.

By adopting the technical scheme, the mass flowmeter detects the quantity of the engine oil and the quantity of the refrigerant pumped into the container, changes the proportion of the engine oil and the refrigerant, tests the compatibility of different concentrations, and the pressure gauge is used for detecting the pressure in the container.

Optionally, an electromagnetic switch valve is further arranged on the first pipeline.

By adopting the technical scheme, once the mass flowmeter detects that the injected engine oil or refrigerant quantity is enough, the electromagnetic switch valve controls the interruption of the first pipeline, so that the transportation of the refrigerant or engine oil is controlled to stop, and the accurate proportion of the container engine oil and the refrigerant is ensured.

Optionally, the turbidity detection unit comprises a laser emitter and a laser receiver, and the laser emitter and the laser receiver are respectively arranged at two sides of the container.

By adopting the technical scheme, the laser transmitter transmits laser to pass through the container, and is received by the laser receiver, so that the critical temperature of engine oil and refrigerant in the container when becoming turbid is detected, and the two-layer separation temperature can be obtained.

Optionally, the temperature detection unit is a platinum resistance thermometer, and the platinum resistance thermometer is inserted into the container through the upper end face of the container.

By adopting the technical scheme, the platinum resistance thermometer is sensitive in detection, so that the accuracy of temperature detection can be improved.

In summary, the present utility model includes at least one of the following beneficial technical effects:

1. the high-pressure pump can be used for filling oil into the container, the refrigerant can be added into the container so as to test different oil and refrigerant proportions, the refrigerant is pumped in, when the non-azeotropic refrigerant is prepared, the concentration can be changed by adding the refrigerant, the refrigerant does not need to be discharged, errors can not be generated, and the test result is accurate. Therefore, it can be applied to azeotropic refrigerants and non-azeotropic refrigerants.

2. Through the setting of mass flowmeter, manometer, platinum resistance thermometer, laser emitter, laser receiver and controller etc. the whole automation of test procedure is realized, efficiency of software testing is improved greatly.

Drawings

FIG. 1 is a schematic diagram of an apparatus for testing high-voltage compatibility according to an embodiment of the present utility model.

Fig. 2 is a schematic view of the structure of a container according to an embodiment of the present utility model.

Reference numerals illustrate: 1. an environmental test chamber; 2. a container; 21. an upper flange; 22. a hollow cylinder; 23. a lower flange; 24. a bolt; 25. a seal ring; 3. a high pressure pump; 4. a frozen oil storage tank; 5. a refrigerant storage tank; 6. a heating device; 7. a cooling device; 8. a first pipeline; 9. a mass flowmeter; 10. a pressure gauge; 11. an electromagnetic switch valve; 12. a laser emitter; 13. a laser receiver; 14. a platinum resistance thermometer; 15. and a controller.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-2.

The embodiment of the utility model discloses equipment for testing high-voltage compatibility. Referring to fig. 1, the apparatus includes an environmental test chamber 1, a container 2, a high pressure pump 3, a chilled oil tank 4, a refrigerant tank 5, a temperature detection unit, and a turbidity detection unit. The container 2 is arranged in the environment test chamber 1.

The inlet of the high-pressure pump 3 is respectively connected with the frozen oil storage tank 4 and the refrigerant storage tank 5, the outlet is connected with the container 2, engine oil in the frozen oil storage tank 4 can be injected into the container 2 through the high-pressure pump 3, and refrigerant in the refrigerant storage tank 5 is also injected into the container 2 through the high-pressure pump 3. The test medium in the container 2 is engine oil and refrigerant. The environment test box 1 is internally provided with a heating device 6 and a cooling device 7, and the heating device 6 and the cooling device 7 are used for heating and cooling the environment test box 1 so as to control the temperature range of the environment test box 1, so that the environment test box can meet the test requirements. By providing the high-pressure pump 3, the refrigerant oil and the refrigerant can be injected into the container 2, and the refrigerant oil and the refrigerant cannot be injected due to the excessively high pressure in the container 2, so that the refrigerant oil and the refrigerant can be prepared into different concentration ratios, and the test can be completed.

Referring to fig. 2, in the present embodiment, the vessel 2 is composed of an upper flange 21, a hollow cylinder 22 and a lower flange 23, the hollow cylinder 22 is preferably a quartz glass tube, and the upper flange 21 and the lower flange 23 are preferably stainless steel. The upper flange 21 is detachably connected with the upper end of the hollow cylinder 22, and the lower flange 23 is detachably connected with the lower end of the hollow cylinder 22. The concrete structure is as follows: the upper flange 21 and the lower flange 23 are locked by a plurality of bolts 24, the quartz glass tube is clamped between the upper flange 21 and the lower flange 23, and sealing rings 25 are arranged between the quartz glass tube and the upper flange 21 and the lower flange 23 for sealing. The fastening structure can improve the service life and the performance without damaging the structure of the quartz glass tube. In addition, the quartz glass tube can be detached for cleaning respectively, so that the quartz glass tube has no sanitary dead angle, is convenient to clean and can better ensure no residual oil. A connection (not shown) is provided on the upper flange 21, which connection is connected to the high-pressure pump 3 via a line one 8.

In this embodiment, the turbidity detection unit comprises a laser emitter 12 and a laser receiver 13, and the laser emitter 12 and the laser receiver 13 are respectively arranged at two sides of the container 2. The laser emitter 12 emits laser to pass through the container 2, and is received by the laser receiver 13, and the critical temperature when engine oil and refrigerant in the container 2 become turbid is detected, so that the two-layer separation temperature can be obtained. The temperature is measured by a temperature detection unit, preferably a platinum resistance thermometer 14, which platinum resistance thermometer 14 is inserted into the container 2 through the upper flange 21 to measure the temperature of the medium in the container 2.

In this embodiment, for automatic control, the apparatus is provided with a controller 15, and in addition, a mass flowmeter 9 and a pressure gauge 10 are provided on the first pipe 8, and an electromagnetic switch valve 11 is also provided on the first pipe 8. The heating device 6, the cooling device 7, the electromagnetic switch valve 11 and the high-pressure pump 3 are connected with a controller to form a control part, and the mass flowmeter 9, the pressure gauge 10, the platinum resistance thermometer 14 and the laser receiver 13 form a data acquisition part. The controller 15 sets the ratio parameters, controls the high-pressure pump 3 to inject the engine oil and the refrigerant into the container 2 through the data fed back by the mass flowmeter 9, and closes the first pipeline 8 and the high-pressure pump 3 through the electromagnetic switch valve 11 after the set value is reached, and stops the addition. The platinum resistance thermometer 14 detects the temperature of the engine oil and the refrigerant in the container, and controls the temperature in the environmental test chamber 1 by controlling the on-off of the heating device 6 and the cooling device 7 through the control 15 so as to satisfy the test conditions. The pressure gauge monitors the pressure in the vessel 2 in real time and feeds it back to the controller 15. The laser emitted by the laser emitter 12 is received by the laser receiver 13 and fed back to the controller 15 to determine the two-phase separation temperature points of the engine oil and the refrigerant.

The working principle of the equipment for testing high-voltage compatibility in the embodiment of the utility model is as follows: after the equipment is assembled, the electromagnetic switch valve 11 and the high-pressure pump 3 are opened, engine oil (or refrigerant) is firstly injected into the container, for example, concentration test with the preset oil content of 5 percent is performed, the mass flowmeter 9 controls the injected engine oil to be 5 percent, then the refrigerant is injected, the mass flowmeter 9 controls the refrigerant to be 95 percent, then the electromagnetic switch valve 11 and the high-pressure pump 3 are closed, the temperature in the environment test box 1 is adjusted by opening the heating device 6 or the cooling device 7, the temperature of the engine oil and the refrigerant in the container 2 is further adjusted to be mixed and compatible, at the moment, the platinum resistance thermometer 14 monitors the temperature in real time and feeds back to the controller 15, meanwhile, the laser transmitter 12 is started, the laser receiver 13 receives parameters and feeds back to the controller 15, when the laser detects the critical temperature when the engine oil and the refrigerant in the container 2 are changed, two-layer separation temperature can be obtained, the temperature is recorded and stored at the temperature, at the moment, the 5 percent oil content test can be performed, and the next data test can be performed. The testing process can realize full automation without personnel participation, thereby improving the testing efficiency and reducing the testing cost.

In the subsequent test, when the oil content increases, the high-pressure pump 3 is used for injecting the frozen oil into the container to adjust the proportion, and when the oil content decreases, the high-pressure pump is used for injecting the refrigerant into the container 2 to adjust the proportion, and the refrigerant is not required to be discharged in the whole process, so that the utility model can be applied to azeotropic refrigerants and non-azeotropic refrigerants.

The existing test equipment is characterized in that a certain amount of oil is added into a test tube, then the proportion is adjusted by adding or discharging refrigerant, because the internal volume of the test tube is certain, when the oil content is low, little oil and much refrigerant are needed, when the oil content is high, much oil and little refrigerant are needed, the test tube must be emptied and the sample is added again in the test process, the azeotropic refrigerant can be adopted, but the non-azeotropic refrigerant cannot be adopted as the discharge method can not be adopted, because the refrigerant composition is changed due to the discharge of the non-azeotropic refrigerant.

The high-pressure pump 3 of the present utility model can be used to fill the inside of the container 2, or can be used to fill the inside of the container 2 with refrigerant. A small amount of oil can be initially added for testing low oil content, and then frozen oil is continuously pumped into the container 2 to improve the oil content, so that different oil and refrigerant ratios can be tested. By pumping in the refrigerant, when the non-azeotropic refrigerant is made, the concentration can be changed by adding the refrigerant from the test of high oil content, the refrigerant is not required to be discharged, errors are avoided, and the test result is accurate. Therefore, it can be applied to azeotropic refrigerants and non-azeotropic refrigerants.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims

1. An apparatus for testing high pressure compatibility, characterized by: including environment test case (1), container (2), high-pressure pump (3), frozen oil storage tank (4), refrigerant storage tank (5), temperature detection unit and turbidity detection unit, be equipped with heating device (6) and cooling device (7) in environment test case (1), container (2) are located in environment test case (1) and are used for holding test medium, the entry of high-pressure pump (3) is connected with frozen oil storage tank (4) and refrigerant storage tank (5) respectively, and the export is connected with container (2), turbidity detection unit is used for detecting the turbidity of test medium, temperature detection unit is used for detecting the temperature of test medium.

2. The apparatus for testing high pressure compatibility of claim 1, wherein: the container (2) comprises an upper flange (21), a hollow cylinder (22) and a lower flange (23), wherein the upper flange (21) is detachably connected with the upper end of the hollow cylinder (22), and the lower flange (23) is detachably connected with the lower end of the hollow cylinder (22).

3. The apparatus for testing high pressure compatibility of claim 2, wherein: the hollow cylinder (22) is a quartz glass tube.

4. The apparatus for testing high pressure compatibility of claim 2, wherein: the upper flange (21) and the lower flange (23) are locked by bolts (24), and the hollow cylinder (22) is clamped between the upper flange (21) and the lower flange (23).

5. The apparatus for testing high-pressure compatibility according to any one of claims 1 to 4, wherein: the high-pressure pump (3) is connected with the container (2) through a first pipeline (8), and a mass flowmeter (9) and a pressure gauge (10) are arranged on the first pipeline (8).

6. The apparatus for testing high pressure compatibility of claim 5, wherein: an electromagnetic switch valve (11) is also arranged on the first pipeline (8).

7. The apparatus for testing high-pressure compatibility according to any one of claims 1 to 4, wherein: the turbidity detection unit comprises a laser emitter (12) and a laser receiver (13), wherein the laser emitter (12) and the laser receiver (13) are respectively arranged at two sides of the container (2).

8. The apparatus for testing high-pressure compatibility according to any one of claims 1 to 4, wherein: the temperature detection unit is a platinum resistance thermometer (14), and the platinum resistance thermometer (14) penetrates through the upper end face of the container (2) and is inserted into the container (2).