A high-temperature, high-pressure, high-frequency oil flowmeter calibration device

Abstract

The present invention discloses a high-temperature, high-pressure, high-frequency oil flow meter calibration device, including an oil source unit, a high-temperature test unit and a normal-temperature test unit. The high-temperature test section and the normal-temperature test section are movable, so that the oil source unit can be easily disassembled and replaced with the high-temperature test unit or the normal-temperature test unit for connection and use. The present invention relates to the field of flow meter calibration technology. The device has a compact structure, simple operation, and a high degree of visualization. The multi-section splicable structure provides a more convenient test connection form. Each test content can be run independently or in linkage. The purely imported calibration instrument provides more accurate data for the tested instrument. All data are collected and analyzed through a unified PLC system in the factory area, and all test data can be provided. The device has strong functionality. All test pieces can be clamped at one time to test all data. Only operation is required on the control panel. More test contents can be added by adding more test sections.

Description

Technical Field

[0001] The present invention relates to the technical field of flowmeter calibration, and specifically to a calibration device for high-temperature, high-pressure, and high-frequency oil flowmeters. Background Art

[0002] Measurement is the eye of industrial production. Flow measurement is one of the components of measurement science and technology, and it is closely related to the national economy, national defense construction, and scientific research. Doing a good job in this work plays an important role in ensuring product quality, improving production efficiency, and promoting the development of science and technology. Especially in the current era of energy crisis and increasingly high degree of industrial production automation, the status and role of flowmeters in the national economy are even more obvious. Liquid flowmeters need to go through the in-flow calibration and verification process of the calibration system to improve the reliability of fluid measurement results.

[0003] Chinese Patent CN210071076U discloses a new type of small-flow liquid calibration system, which relates to the technical field of liquid flow calibration, and includes a main pipeline, a calibration pipeline, a liquid flowmeter, a first infusion pipe, a second infusion pipe, a third infusion pipe, a fourth infusion pipe, a fifth infusion pipe, a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, a first mounting rack, and a second mounting rack;

[0004] This device can calibrate and test the flowmeter. However, the structure of this device is simple, the calibration data is inaccurate, and it is not convenient to use. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a calibration device for high-temperature, high-pressure, and high-frequency oil flowmeters, which solves the problems of simple structure and poor calibration effect of the existing device.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A calibration device for high-temperature, high-pressure, and high-frequency oil flowmeters, including an oil source unit, a high-temperature test unit, and a normal-temperature test unit, where the oil source unit is connected and used with the high-temperature test unit or the normal-temperature test unit;

[0007] The oil source unit includes an oil tank, as well as a first oil circuit, a second oil circuit, and a third oil circuit connected to the oil tank. A low-pressure ball valve, a liquid level gauge, and a temperature sensor are provided on the oil tank. A gear pump, a first check valve, and an electro-hydraulic directional valve are provided on the first oil circuit. The electro-hydraulic directional valve has a first branch, and a first stop valve is provided on the first branch. A plunger pump, a second check valve, and an electromagnetic directional valve are provided on the second oil circuit. A second branch is connected to the electromagnetic directional valve, and a second stop valve is provided on the second branch. The first oil circuit and the second oil circuit are connected and provided with a third stop valve. A first branch is connected to the electro-hydraulic directional valve, and a relief valve is provided at the other end of the first branch. The electromagnetic directional valve is connected to the first branch. A return oil filter is provided on the third branch and the other end is connected to the first branch. A second branch is provided between the first oil circuit and the third oil circuit, and a first electromagnetic relief valve is provided on the second branch. The second oil circuit and the second branch are connected and provided with a second electromagnetic relief valve. The second electromagnetic relief valve and the relief valve are connected through an oil circuit.

[0008] Preferably, the high-temperature test section and the normal-temperature test section are movable, which is convenient for mutual disassembly and replacement.

[0009] Preferably, the high-temperature test unit includes a high-temperature test pipeline, a heating device connected to the high-temperature test pipeline, a test piece, and a cooling device.

[0010] Preferably, the normal-temperature test unit includes a normal-temperature test pipeline and a test piece connected to the normal-temperature test pipeline.

[0011] Preferably, a heater is provided on the oil tank.

[0012] Preferably, an air filter is provided on the oil tank.

[0013] Preferably, pressure gauges are provided on the first oil circuit, the second oil circuit, the first branch, and the second branch.

[0014] Preferably, a first motor is connected to the gear pump.

[0015] Preferably, a second motor is connected to the plunger pump.

[0016] Beneficial effects

[0017] The present invention discloses a high-temperature, high-pressure, and high-frequency oil flowmeter calibration device, which has the following beneficial effects:

[0018] 1. Compact structure, simple operation, and high visualization level;

[0019] 2. Multi-section splicable structure, providing a more convenient test connection form;

[0020] 3. Each test content can be run independently or in linkage.

[0021] 4. Purely imported calibration instruments provide more accurate data for the tested instruments.

[0022] 5. All data are collected and analyzed through the unified PLC system in the factory area, and all test data can be provided.

[0023] 6. High safety and reliability. Visual protective covers are equipped in all test areas, which can not only observe the test status but also protect the safety of surrounding personnel.

[0024] 7. Strong functionality. All test pieces can be clamped once to test all data, and only need to be operated on the control panel.

[0025] 8. Strong expandability. The maximum test parameters can be improved by replacing existing components, and the installation dimensions do not need to be changed. More test contents can also be added by increasing more test sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the present invention.

[0027] Figure 2 is a schematic structural diagram of the high-temperature test unit of the present invention.

[0028] Figure 3 is a schematic structural diagram of the normal-temperature test unit of the present invention.

[0029] In the figure: 1. Oil source unit; 101. Oil tank; 102. First oil circuit; 103. Second oil circuit; 104. Low-pressure ball valve; 105. Liquid level gauge; 106. Temperature sensor; 107. Gear pump; 108. First check valve; 109. Electro-hydraulic reversing valve; 110. First shunt; 111. First stop valve; 112. Plunger pump; 113. Second check valve; 114. Electromagnetic reversing valve; 115. Second shunt; 116. Second stop valve; 117. Third stop valve; 118. First branch; 119. Relief valve; 120. Return oil filter; 121. Second branch; 122. First electromagnetic relief valve; 123. Second electromagnetic relief valve; 124. Heater; 125. Air filter; 126. Pressure gauge; 127. First motor; 128. Second motor; 129. Third oil circuit; 2. High-temperature test unit; 201. High-temperature test pipeline; 202. Heating device; 203. Cooling device; 3. Normal-temperature test unit; 301. Normal-temperature test pipeline; 4. Test piece. DETAILED DESCRIPTION OF THE INVENTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1 - 3 , the present invention provides a technical solution: a high-temperature, high-pressure, high-frequency oil flowmeter calibration device, which includes an oil source unit 1, a high-temperature test unit 2, and a normal-temperature test unit 3. The oil source unit 1 is connected and used with the high-temperature test unit 2 or the normal-temperature test unit 3; the oil source unit 1 includes an oil tank 101, and a first oil circuit 102, a second oil circuit 103, and a third oil circuit 129 connected to the oil tank 101. A low-pressure ball valve 104, a liquid level gauge 105, and a temperature sensor 106 are provided on the oil tank 101. A gear pump 107, a first check valve 108, and an electro-hydraulic directional valve 109 are provided on the first oil circuit 102. The electro-hydraulic directional valve 109 is provided with a first branch 110, and a first stop valve 111 is provided on the first branch 110. A plunger pump 112, a second check valve 113, and an electromagnetic directional valve 114 are provided on the second oil circuit 103. A second branch 115 is connected to the electromagnetic directional valve 114, and a second stop valve 116 is provided on the second branch 115. The first oil circuit 102 and the second oil circuit 103 are connected and provided with a third stop valve 117. A first branch 118 is connected to the electro-hydraulic directional valve 109, and a relief valve 119 is provided at the other end of the first branch 118. The electromagnetic directional valve 114 is connected to the first branch 118. An oil return filter 120 is provided on the third branch and the other end is connected to the first branch 118. A second branch 121 is provided between the first oil circuit 102 and the third oil circuit 129, and a first electro-magnetic relief valve 122 is provided on the second branch 121. The second oil circuit 103 and the second branch 121 are connected and provided with a second electro-magnetic relief valve 123. The second electro-magnetic relief valve 123119 and the relief valve 119 are connected through an oil circuit; the high-temperature test section and the normal-temperature test section are movable, which is convenient for mutual disassembly and replacement; the high-temperature test unit 2 includes a high-temperature test pipeline 201, a heating device 202 connected to the high-temperature test pipeline 201, a test piece 4, and a cooling device 203; the normal-temperature test unit 3 includes a normal-temperature test pipeline 301 and a test piece 4 connected to the normal-temperature test pipeline 301; a heater 124 is provided on the oil tank 101; an air filter 125 is provided on the oil tank 101; pressure gauges 126 are provided on the first oil circuit 102, the second oil circuit 103, the first branch 110, and the second branch 115; a first motor 127 is connected to the gear pump 107; a second motor 128 is connected to the plunger pump 112.

[0032] Those skilled in the art shall connect the components in this case in sequence. For the specific connection and operation sequence, reference shall be made to the following working principle. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process.

[0033] Example: According to Figures 1 - 3 it can be known that

[0034] Instructions for use of high-pressure small-flow conventional test section:

[0035] 1. Start the second motor 128 and adjust the relief valve 119 to make the system pressure reach the normal use value.

[0036] 2. Open the second stop valve 116.

[0037] 3. Control the electromagnetic directional valve 114 to make the oil flow direction consistent with the test requirement direction.

[0038] 4. According to the requirements of the test piece, collect the pressure and flow rate values of the test piece flowmeter.

[0039] 5. Adjust the relief valve 119 to make the pressure take any value between 0 - 35 MPa.

[0040] 6. Adjust the opening of the second stop valve 116 to make the flow rate take any value between 0 - 35 L / min.

[0041] Instructions for use of high-pressure small-flow high-temperature test section:

[0042] 1. The usage method is the same as that of the conventional test section.

[0043] 2. Add high-temperature heating control. Control the heater 124 of the oil tank 101 to raise the oil temperature to 60 °C, and then control the heating device 202 to make the oil temperature reach the test requirement, up to 150 °C.

[0044] 3. When the heating device 202 is turned on, the cooling device 203 needs to run synchronously to lower the oil temperature to 60 °C.

[0045] Other tests are the same as the above tests, just change to the corresponding control valves.

[0046] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0047] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A calibration device for high-temperature, high-pressure, and high-frequency oil flowmeters, characterized in that, it includes an oil source unit (1), a high-temperature test unit (2), and a normal-temperature test unit (3), and the oil source unit (1) is connected and used with the high-temperature test unit (2) or the normal-temperature test unit (3); The oil source unit (1) includes an oil tank (101), a first oil circuit (102), a second oil circuit (103), and a third oil circuit (129) connected to the oil tank (101). A low-pressure ball valve (104), a liquid level gauge (105), and a temperature sensor (106) are provided on the oil tank (101). A gear pump (107), a first one-way valve (108), and an electro-hydraulic directional valve (109) are provided on the first oil circuit (102). The electro-hydraulic directional valve (109) is provided with a first branch (110), and a first stop valve (111) is provided on the first branch (110). A plunger pump (112), a second one-way valve (113), and an electromagnetic directional valve (114) are provided on the second oil circuit (103). A second branch (115) is connected to the electromagnetic directional valve (114), and a second stop valve (116) is provided on the second branch (115). The first oil circuit (102) and the second oil circuit (103) are connected and provided with a third stop valve (117). A first branch (118) is connected to the electro-hydraulic directional valve (109), and a relief valve (119) is provided at the other end of the first branch (118). The electromagnetic directional valve (114) is connected to the first branch (118). A return oil filter (120) is provided on the third oil circuit (129) and the other end is connected to the first branch (118). A second branch (121) is provided between the first oil circuit (102) and the third oil circuit (129), and a first electromagnetic relief valve (122) is provided on the second branch (121). The second oil circuit (103) and the second branch (121) are connected and provided with a second electromagnetic relief valve (123). The second electromagnetic relief valve (123) and the relief valve (119) are connected through an oil circuit.

2. The calibration device for high-temperature, high-pressure, and high-frequency oil flowmeters according to claim 1, characterized in that, the high-temperature test unit (2) includes a high-temperature test pipeline (201), a heating device (202) connected to the high-temperature test pipeline (201), a test piece (4), and a cooling device (203).

3. The calibration device for high-temperature, high-pressure, and high-frequency oil flowmeters according to claim 2, characterized in that, the normal-temperature test unit (3) includes a normal-temperature test pipeline (301) and a test piece (4) connected to the normal-temperature test pipeline (301).

4. The calibration device for high-temperature, high-pressure, and high-frequency oil flowmeters according to claim 1, characterized in that, a heater (124) is provided on the oil tank (101).

5. The calibration device for high-temperature, high-pressure, and high-frequency oil flowmeters according to claim 1, characterized in that, An air filter (125) is provided on the fuel tank (101).

6. A high-temperature, high-pressure, high-frequency oil flowmeter calibration device according to claim 1, characterized in that, pressure gauges (126) are provided on the first oil circuit (102), the second oil circuit (103), the first branch (110) and the second branch (115).

7. A high-temperature, high-pressure, high-frequency oil flowmeter calibration device according to claim 1, characterized in that, a first motor (127) is connected to the gear pump (107).

8. A high-temperature, high-pressure, high-frequency oil flowmeter calibration device according to claim 1, characterized in that, a second motor (128) is connected to the plunger pump (112).

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