Oil conductivity meter calibration device

Abstract

The utility model discloses a verification and calibration device for an oil conductivity meter, which belongs to the technical field of measurement and verification. The utility model comprises a box body, a conductivity meter standard device, an electric control box, a temperature controller and a conductivity cell detector. The conductivity meter standard device is assembled on the right side of the upper surface of the box body, the conductivity cell detector is assembled on the right side of the upper surface of the box body, the conductivity cell connector is arranged on the conductivity cell detector, a constant temperature bath is arranged on the left side of the upper surface of the box body, a cup body supporting structure is arranged in the constant temperature bath, a cover is assembled on the left side of the upper surface of the box body, the electric control box is assembled on the upper surface of the cover body, and the temperature controller is assembled on the front surface of the electric control box. The utility model improves the accuracy of the temperature controller and the conductivity meter standard device, so that the temperature detection of the temperature controller is more accurate, the error of the conductivity meter standard device is smaller, and the verification and calibration work of the conductivity meter is more accurate.

Description

Technical Field

[0001] The utility model belongs to the technical field of measurement and verification, and in particular provides a verification and calibration device for an oil conductivity meter. Background Art

[0002] The oil conductivity meter, also known as the conductivity meter, is a special instrument used to measure oil safety parameters. Its measurement range belongs to the field of high resistance measurement. Oil will generate static electricity during transmission due to high impedance, poor conductivity, and too low conductivity. However, due to the high impedance, the static electricity cannot be conducted to the ground through the grounding device, which will lead to explosion accidents. The oil conductivity meter is a device for testing oil, judging whether the oil conductivity is too low, and avoiding accidents to the greatest extent.

[0003] The existing oil conductivity meter calibration devices on the market have the following defects:

[0004] 1. The accuracy of most special thermostatic bath products is not high. They can meet the standard requirements, but they often cannot achieve this accuracy during use, resulting in errors in the verification process;

[0005] 2. The accuracy of most standard oil conductivity meters is low;

[0006] 3. When using a constant temperature bath to heat the test liquid and oil, the cup body supports need to be replaced frequently due to the different sizes of the cup bodies for the test liquid and oil, which is cumbersome to operate;

[0007] 4. Many components are bulky, inconvenient to operate, and occupy a large space. Utility Model Content

[0008] In order to solve the above problems, the utility model provides a verification and calibration device for an oil conductivity meter.

[0009] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an oil conductivity meter verification and calibration device, comprising a box body, a conductivity meter standard device, an electric control box, a temperature controller and a conductivity cell verification instrument, wherein the conductivity meter standard device is mounted on the right side of the upper surface of the box body, and the conductivity meter is mounted on the conductivity meter standard device, the conductivity cell verification instrument is mounted on the right side of the upper surface of the box body, and the conductivity cell verification instrument is provided with a conductivity cell connector, a constant temperature bath is provided on the left side of the upper surface of the box body, a cup body support structure is installed in the constant temperature bath, a cover body is mounted on the left side of the upper surface of the box body, the electric control box is mounted on the upper surface of the cover body, and the temperature controller is mounted on the front surface of the electric control box.

[0010] Furthermore, the cup body supporting structure includes a supporting member and a cup body supporting member, the supporting member is fixedly mounted on the inner wall of the constant temperature bath, and the cup body supporting member is placed on the upper surface of the supporting member, and a through hole is opened in the middle of the upper surface of the cup body supporting member.

[0011] Furthermore, the conductivity meter standard device uses high-precision resistors inside.

[0012] Furthermore, the constant temperature bath is made of heat-conducting metal.

[0013] Furthermore, a compressor and a heating tube are installed inside the box, and the compressor and the heating tube are arranged on the outer wall of the constant temperature bath.

[0014] Furthermore, a motor is installed in the cover body, and the motor is connected to the compressor, and the temperature controller is electrically connected to the motor and the heating tube.

[0015] Furthermore, the cup body support structure also includes a circular ring and an adjustable cup body support, and there are four adjustable cup body supports, the four adjustable cup body supports are evenly movably assembled on the inner wall of the circular ring, the upper surface of the cup body support is evenly inclined and provided with an arc groove, and there are four arc grooves in total, one end of the arc groove is away from the axis of the cup body support, and the other end is close to the axis of the cup body support, the lower surface of the adjustable cup body support is integrally formed with a moving block, and the moving block is movably assembled in the arc groove.

[0016] Furthermore, a slot is provided on the outer surface of the adjustable cup body support, an insertion rod is fixedly mounted on the inner wall of the ring, and the insertion rod is inserted into the slot.

[0017] Furthermore, a protrusion is integrally formed on the upper surface of the ring.

[0018] The beneficial effects of using the utility model are:

[0019] 1. The utility model improves the accuracy of the temperature controller and the conductivity meter standard device, making the temperature detection of the temperature controller more accurate, and the error of the conductivity meter standard device smaller, thereby making the verification and calibration of the conductivity meter more accurate.

[0020] 2. The utility model designs a cup body support structure, and the position of the adjustable cup body support inside it can be adjusted through simple operation, so that it is suitable for placing cups of different sizes, avoiding the trouble of frequently replacing the cup body support structure according to different cups. The operation is simple and the measurement efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the front view of the utility model.

[0022] Figure 2 This is a cross-sectional view of the cup body support structure of the first embodiment of the present invention.

[0023] Figure 3 This is a cross-sectional view of the cup body support structure of the second embodiment of the present utility model.

[0024] Figure 4 It is a top view of the cup body supporting structure of the second embodiment of the present utility model.

[0025] The reference numerals include: 1. box body, 2. conductivity meter standard device, 3. conductivity meter, 4. constant temperature bath, 5. cup body support structure, 51. support member, 52. cup body support member, 53. ring, 54. adjustable cup body support member, 55. arc groove, 56. moving block, 57. slot, 58. plug rod, 59. protrusion, 6. cover body, 7. electric control box, 8. temperature controller, 9. conductivity cell calibrator, 10. conductivity cell connector. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1

[0028] Reference Figure 1 and Figure 2 The oil conductivity meter verification and calibration device comprises a box body 1, a conductivity meter standard device 2, an electric control box 7, a temperature controller 8 and a conductivity cell verification device 9. The conductivity meter standard device 2 is mounted on the right side of the upper surface of the box body 1, and the conductivity meter 3 is mounted on the conductivity meter standard device 2. The conductivity cell verification device 9 is mounted on the right side of the upper surface of the box body 1. The conductivity cell verification device 9 is provided with a conductivity cell connector 10. A constant temperature bath 4 is provided on the left side of the upper surface of the box body 1. A cup body support structure 5 is installed in the constant temperature bath 4. A cover body 6 is mounted on the left side of the upper surface of the box body 1. The electric control box 7 is mounted on the upper surface of the cover body 6. The temperature controller 8 is mounted on the front surface of the electric control box 7.

[0029] The conductivity meter standard device 2 is provided with a BNC interface, and the conductivity meter 3 can be directly connected through the BNC interface, or connected through a TNC to BNC interface. After the connection, rotate the knob on the conductivity meter standard device 2 to select a value, and the conductivity meter 3 will display the reading. The comparison between the two can realize the verification of the conductivity meter 3, and then the calibration work can be carried out.

[0030] The constant temperature bath 4 is a special constant temperature bath structure. Distilled water needs to be injected into the constant temperature bath 4, 20 mm from the right side of the bath top, and the temperature is adjusted by a temperature controller 8 to generally be 25°C.

[0031] Specifically, if Figure 2 As shown, the cup body support structure 5 includes a support member 51 and a cup body support member 52. The support member 51 is fixedly mounted on the inner wall of the constant temperature bath 4, and the cup body support member 52 is placed on the upper surface of the support member 51. A through hole is opened in the middle of the upper surface of the cup body support member 52.

[0032] The conductivity cell tester 9 is provided with a conductivity cell connector 10 for measuring the conductivity cell constant. During measurement, a test liquid is placed in a corresponding cup body, and is placed on the cup body support structure 5 and placed in a constant temperature bath 4, wherein the test liquid is a conductivity solution. After the temperature in the constant temperature bath 4 reaches a constant temperature state of 25° C., the conductivity cell connector 10 is placed in the test liquid, and the conductivity cell constant is calculated and displayed on the conductivity cell tester 9;

[0033] Then, the cup body containing the test liquid is taken out, and the cup body containing the oil is placed in the constant temperature bath 4, wherein the oil is selected to have a known conductivity. Since the oil cup body is generally larger than the test liquid cup body, the cup support 52 in the cup support structure 5 needs to be replaced, and a cup support 52 with a larger through hole is selected. When the constant temperature state is reached, the oil is measured using the conductivity meter 3, and the ratio of the measurement result to the conductivity of the oil itself is compared with the conductivity cell constant, thereby completing the calibration of the conductivity meter 3.

[0034] Specifically, a high-precision resistor is used inside the conductivity meter standard device 2 to improve the accuracy of the conductivity meter standard device 2 .

[0035] Specifically, the constant temperature bath 4 is made of heat-conducting metal, which can quickly and effectively conduct heat, so that the constant temperature bath 4 reaches a constant temperature state of a set temperature.

[0036] Specifically, a compressor and a heating pipe are installed inside the box body 1 , and the compressor and the heating pipe are arranged on the outer wall of the constant temperature bath 4 .

[0037] The compressor is used for cooling, and the heating tube is used for heating, and the two cooperate to keep the constant temperature bath 4 at a constant temperature.

[0038] Specifically, a motor is installed in the cover body 6, and the motor is connected to the compressor, and the temperature controller 8 is electrically connected to the motor and the heating tube.

[0039] The electric control box 7 supplies power to the conductivity meter standard device 2, the temperature controller 8, the conductivity cell calibrator 9, the motor and the heating tube.

[0040] After the dedicated constant temperature bath works normally each time, if it needs to be restarted, the interval must be more than 20 minutes to avoid damaging the compressor and refrigeration system.

[0041] Embodiment 2

[0042] The difference from the first embodiment is that:

[0043] Specifically, if Figure 3 and Figure 4 As shown, the cup body support structure 5 also includes a circular ring 53 and an adjustable cup body support 54, and there are four adjustable cup body supports 54. The four adjustable cup body supports 54 are evenly movably assembled on the inner wall of the circular ring 53. The upper surface of the cup body support 52 is evenly inclined to open an arc groove 55, and there are four arc grooves 55. One end of the arc groove 55 is away from the axis of the cup body support 52, and the other end is close to the axis of the cup body support 52. The lower surface of the adjustable cup body support 54 is integrally formed with a moving block 56, and the moving block 56 is movably assembled in the arc groove 55.

[0044] Specifically, if Figure 4 As shown, a slot 57 is formed on the outer surface of the adjustable cup support 54 , and an insertion rod 58 is fixedly mounted on the inner wall of the ring 53 , and the insertion rod 58 is inserted into the slot 57 .

[0045] Specifically, if Figure 3 and Figure 4 As shown, a protrusion 59 is integrally formed on the upper surface of the ring 53 .

[0046] The ring 53 can be rotated by the protrusion 59. During the rotation, under the guidance of the arc groove 55 and the cooperation between the slot 57 and the insertion rod 58, the adjustable cup support 54 can be moved, thereby forming support structures of different sizes for supporting cups of different sizes. That is, when measuring the test liquid and different oils, there is no need to frequently replace the cup support 52, and it can be completed with a simple rotation, which is simple and convenient to operate.

[0047] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present invention. As long as these changes do not deviate from the concept of the present invention, they all belong to the protection scope of the present invention.

Claims

1. Oil conductivity meter verification and calibration device, characterized by: The invention comprises a box body, a conductivity meter standard device, an electric control box, a temperature controller and a conductivity cell calibrator. The conductivity meter standard device is mounted on the right side of the upper surface of the box body, and the conductivity meter is mounted on the conductivity meter standard device. The conductivity cell calibrator is mounted on the right side of the upper surface of the box body, and a conductivity cell connector is arranged on the conductivity cell calibrator. A constant temperature bath is provided on the left side of the upper surface of the box body, and a cup support structure is arranged in the constant temperature bath. A cover is mounted on the left side of the upper surface of the box body, and the electric control box is mounted on the upper surface of the cover body. The temperature controller is mounted on the front surface of the electric control box.

2. The oil conductivity meter verification and calibration device according to claim 1, characterized in that: The cup body supporting structure comprises a supporting member and a cup body supporting member, wherein the supporting member is fixedly mounted on the inner wall of the constant temperature bath, and the cup body supporting member is placed on the upper surface of the supporting member, and a through hole is opened in the middle of the upper surface of the cup body supporting member.

3. The oil conductivity meter verification and calibration device according to claim 1, characterized in that: The conductivity meter standard device uses high-precision resistors inside.

4. The oil conductivity meter verification and calibration device according to claim 1, characterized in that: The constant temperature bath is made of heat-conducting metal.

5. The oil conductivity meter verification and calibration device according to claim 1, characterized in that: The box body is equipped with a compressor and a heating pipe, and the compressor and the heating pipe are arranged on the outer wall of the constant temperature bath.

6. The oil conductivity meter verification and calibration device according to claim 5, characterized in that: A motor is installed in the cover body, and the motor is connected to the compressor, and the temperature controller is electrically connected to the motor and the heating tube.

7. The oil conductivity meter verification and calibration device according to claim 1, characterized in that: The cup body support structure also includes a circular ring and an adjustable cup body support, and there are four adjustable cup body supports. The four adjustable cup body supports are evenly movably assembled on the inner wall of the circular ring. The upper surface of the cup body support is evenly inclined and has an arc groove, and there are four arc grooves in total. One end of the arc groove is away from the axis of the cup body support, and the other end is close to the axis of the cup body support. A moving block is integrally formed on the lower surface of the adjustable cup body support, and the moving block is movably assembled in the arc groove.

8. The oil conductivity meter verification and calibration device according to claim 7, characterized in that: A slot is provided on the outer surface of the adjustable cup body support, and an insertion rod is fixedly installed on the inner wall of the ring, and the insertion rod is inserted into the slot.

9. The oil conductivity meter verification and calibration device according to claim 7, characterized in that: A convex block is integrally formed on the upper surface of the circular ring.

Images