Automatic calibrating device for pressure gauge

Abstract

The utility model provides an automatic calibrating device for pressure gauges, which comprises a calibrating table, a plurality of bases for pressure gauges to be calibrated are arranged on the upper surface of the calibrating table, and a tapping unit and an image acquisition unit are respectively arranged on the outer side of each base for the pressure gauges to be calibrated. The image acquisition unit and the tapping unit are respectively and electrically connected with a computer, the computer is also connected with a pressure control unit, and the pressure control unit is also respectively connected with the to-be-detected pressure gauge base and the pressure generation unit. Through automatic verification, the complexity of manual operation and interference caused by human factors are reduced. Compared with the traditional manual verification, the device further improves the verification efficiency and ensures the accuracy of the verification result.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure gauge verification, in particular to an automatic pressure gauge verification device. Background Art

[0002] A pressure gauge refers to an instrument that uses an elastic element as a sensitive element to measure and indicate the pressure higher than the ambient pressure, and is widely used in the industrial and scientific research fields. In many fields such as aerospace, petrochemical, and energy, accurate pressure measurement is crucial for ensuring the safety, stability, and efficiency of the production process. Therefore, in order to ensure the accuracy of pressure detection, it is necessary to regularly verify the pressure gauge.

[0003] At present, there are mainly two methods for calibrating precision pressure gauges: 1. Using a piston pressure gauge as a standard for calibration work. It is based on the principle of pressure balance, and a standard pressure value is generated by a piston with a known mass and area reaching equilibrium under the action of pressure, and then compared with the precision pressure gauge to be calibrated. 2. Using a digital pressure as a standard for calibration work. A digital sensor is used to convert the pressure into an electrical signal, which is then digitally processed and displayed, and then compared with the precision pressure gauge to be calibrated. For the above two calibration methods, manual operations such as pressurization, pressure relief, tapping, reading, and recording are required.

[0004] The traditional operation of calibrating precision pressure gauges is cumbersome and inefficient, and is easily affected by human factors, resulting in difficulties in ensuring the accuracy and consistency of the calibration results, and the data management and quality traceability of the calibration results cannot be guaranteed. Content of the Utility Model

[0005] The utility model provides an automatic pressure gauge verification device, which can solve the problem that the accuracy and consistency of the calibration results are difficult to guarantee due to human factors in the traditional calibration of precision pressure gauges, and can accurately record the data of the calibration results.

[0006] The utility model provides an automatic pressure gauge verification device, including a verification table. A plurality of pressure gauges to be verified are arranged on the upper surface of the verification table, and a tapping unit and an image acquisition unit are respectively arranged outside each pressure gauge to be verified. The image acquisition unit and the tapping unit are respectively electrically connected to a computer, and the computer is also connected to a pressure control unit, and the pressure control unit is also respectively connected to the pressure gauges to be verified and a pressure generating unit.

[0007] In a possible implementation, a plurality of enclosures are further arranged around the verification table, and a support rod is connected to the outside of one of the enclosures.

[0008] In a possible implementation, the other end of the support rod is connected with an extension rod. Multiple connection holes are provided on the surfaces of both the extension rod and the support rod. Pin shafts are provided in the multiple connection holes, and the extension rod and the support rod are fixed in cooperation through the corresponding connection holes and pin shafts.

[0009] In a possible implementation, the other end of the extension rod is further connected with a light source, and the light source is arranged directly above the verification table.

[0010] In a possible implementation, connection columns are provided on the surfaces of multiple pressure gauges to be verified. Internal threads are provided inside the connection columns, and the internal threads are connected to the external threads of the pressure gauges to be verified.

[0011] In a possible implementation, the tapping unit includes a fixed rod. One end of the fixed rod is connected with a motor, and the motor is electrically connected to a computer. The other end of the fixed rod is connected with a tapping rod, and the other end of the tapping rod is connected with a tapping head, and the tapping head is arranged on one side of the pressure gauge to be verified.

[0012] In a possible implementation, multiple universal wheels are provided at the bottom of the verification table.

[0013] In a possible implementation, the pressure control unit is arranged below the verification table.

[0014] The technical solution provided by the present utility model has at least the following technical effects:

[0015] (1) Automatic verification process: The device controls the pressure control unit and the image acquisition unit through a computer, realizing the automation of the pressure gauge verification process, reducing the complexity of manual operation and the interference of human factors;

[0016] (2) Improving verification efficiency: The automated verification process improves the verification efficiency. Compared with traditional manual verification, more pressure gauge verification tasks can be completed in a short time;

[0017] (3) Ensuring verification accuracy: Through computer program control, the pressure parameters provided by the pressure generating unit can be accurately adjusted to ensure the accuracy and consistency of pressure gauge verification;

[0018] (4) Image acquisition and analysis: The image acquisition unit in the device can take pictures after the pressure gauge reading is stable, and the computer analyzes and identifies the reading, improving the accuracy and reliability of the reading;

[0019] (5) Setting of the light source: The light source on the light source provides sufficient light for image acquisition, ensuring clear images can be obtained in different detection environments;

[0020] (6) Convenience of the swivel wheels: The swivel wheels at the bottom of the inspection table enable the entire device to move flexibly, facilitating inspection work at different positions and enhancing the operational convenience.

[0021] Through the above analysis, the device realizes the automation of the precision pressure gauge calibration process. While ensuring the accuracy and reliability of the detection results, it improves the calibration efficiency and reduces the technical problems caused by traditional manual calibration. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the present utility model or the prior art. Obviously, the drawings described below are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of a pressure gauge automatic calibration device provided by the present utility model.

[0024] Reference numerals: 1, inspection table; 2, base of the pressure gauge to be inspected; 3, tapping unit; 4, image acquisition unit; 5, computer; 6, pressure control unit; 7, pressure generating unit; 8, enclosure; 9, support rod; 10, extension rod; 11, light source. Detailed Embodiments

[0025] The following will clearly and completely describe the technical solutions in the present utility model with reference to the drawings in the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0027] The present utility model provides a pressure gauge automatic verification device, and its overall structure is shown in Figure 1 .

[0028] Exemplarily, the device includes a verification table 1. A plurality of pressure gauges to be verified bases 2 are arranged on the upper surface of the verification table 1. A tapping unit 3 and an image acquisition unit 4 are respectively arranged outside each pressure gauge to be verified base 2. The image acquisition unit 4 and the tapping unit 3 are respectively electrically connected to a computer 5. The computer 5 is also connected to a pressure control unit 6, and the pressure control unit 6 is also respectively connected to the pressure gauges to be verified bases 2 and a pressure generating unit 7.

[0029] Specifically, according to the parameter requirements of the pressure gauges to be verified, parameters are input into the computer 5. The computer 5 inputs commands to the pressure control unit 6 to adjust the pressure generating unit 7 to provide corresponding air pressure. The pressure generating unit 7 provides pressure to the pressure gauges to be verified connected to the pressure gauges to be verified bases 2, and then the computer 5 respectively issues corresponding operation instructions to the image acquisition unit 4 and the tapping unit 3.

[0030] Specifically, the pressure control unit 6 is respectively connected to the pressure generating unit 7, a plurality of pressure gauges to be verified bases 2, and the computer 5. By means of the automatic control elements and vacuum control elements arranged in the pressure control unit 6, the magnitude of the air pressure provided by the pressure generating unit 7 is adjusted. Further, the automatic control element can be a solenoid valve, and the vacuum control element can be a vacuum pump.

[0031] Exemplarily, a plurality of enclosures 8 are also arranged around the verification table 1. A support rod 9 is connected to the outside of one of the enclosures 8.

[0032] Specifically, the height of the enclosure 8 is not lower than the heights of the image acquisition unit 4 and the pressure gauges to be verified base 2 after installing the pressure gauge. One side of one of the enclosures 8 is connected to the support rod 9, and the support rod 9 is higher than the height of the enclosure 8.

[0033] Exemplarily, the other end of the support rod 9 is connected with an extension rod 10. A plurality of connection holes are provided on the surfaces of the extension rod 10 and the support rod 9. Pins are provided in the plurality of connection holes. The extension rod 10 and the support rod 9 are fixed in cooperation through the corresponding connection holes and pins.

[0034] Specifically, the upper end of the support rod 9 is connected with the extension rod 10. Connection holes are provided at both ends of the connected parts. The support rod 9 and the extension rod 10 are connected and fixed by inserting pins into the connection holes. Moreover, through the arrangement of the plurality of connection holes, the connection position between the extension rod 10 and the support rod 9 is adjustable.

[0035] Exemplarily, the other end of the extension rod 10 is further connected with a light source 11, and the light source 11 is arranged directly above the calibration table 1.

[0036] Specifically, setting the light source 11 above the calibration table 1 can adapt to different detection environments and provide light for the image acquisition unit 4.

[0037] Exemplarily, connection columns are provided on the surfaces of a plurality of pressure gauges to be inspected bases 2. Internal threads are provided inside the connection columns, and the internal threads are connected to the external threads of the pressure gauges to be inspected.

[0038] Specifically, through the adaptation of the internal threads of the pressure gauges to be inspected bases 2 and the external threads of the pressure gauges to be inspected, the connection stability and tightness of the pressure gauges to be inspected are increased.

[0039] Exemplarily, the tapping unit 3 includes a fixed rod. One end of the fixed rod is connected with a motor, the motor is electrically connected to the computer 5, the other end of the fixed rod is connected with a tapping rod, the other end of the tapping rod is connected with a tapping head, and the tapping head is arranged on one side of the pressure gauge to be inspected.

[0040] Specifically, one end of the fixed rod of each tapping unit 3 is electrically connected to the computer 5 for receiving the tapping command sent by the computer 5. The other end of the fixed rod of each tapping unit 3 is connected to the tapping rod, and the tapping head connected to the other end of the tapping rod is used to tap the pressure gauge to be inspected. The tapping head is arranged on one side of the pressure gauge to be inspected, and the tapping heads of the plurality of tapping units 3 all face the image acquisition unit 4.

[0041] Exemplarily, a plurality of universal wheels are provided at the bottom of the calibration table 1.

[0042] Specifically, the universal wheels enable the entire calibration table 1 to move, making it more flexible and convenient.

[0043] Exemplarily, the pressure control unit 6 is arranged below the calibration table 1.

[0044] Specifically, refer to the specific structure of this device Figure 1, the pressure control unit 6 is placed at a position below the calibration table 1, so that the pressure control unit 6, the pressure gauge base 2 to be calibrated, the tapping unit 3 and the image acquisition unit 4 are all arranged together with the calibration table 1 to form an integral body, which is convenient for movement. Thus, the device can adapt to different geographical environments for calibration work.

[0045] Embodiment:

[0046] The pressure gauge to be calibrated is installed on the pressure gauge base 2 to be calibrated. Manually input the pressure information of the pressure gauge to be calibrated into the computer 5 and run the program in the computer 5. The computer 5 sends an instruction to the pressure control unit 6 to give a required pressure value. After the pressure control unit 6 receives the instruction, it controls the opening and closing frequency of the solenoid valve of the pressure control unit 6, thereby controlling the magnitude of the pressure output by the pressure generating unit 7 and supplying it to the pressure gauge to be calibrated through the pressure gauge base 2 to be calibrated.

[0047] After the reading of the pressure gauge to be calibrated is stable, the information is returned to the computer 5 through the pressure control unit 6. At this time, the computer 5 sends an instruction to the image acquisition unit 4. The image acquisition unit 4 provides sufficient light through the light source 11 arranged above, takes a photo of the reading of the pressure gauge to be calibrated, and feeds back the image information to the computer 5. After the photo is taken, the computer 5 sends a tapping instruction to the tapping unit 3. After tapping, the photo is collected again through the image acquisition unit 4, and the image information is fed back to the computer 5 again. The computer 5 reads out the value by analyzing and identifying the images collected twice before and after the tapping of the tapping unit 3, and finally processes and analyzes it to issue the original record and the calibration report.

[0048] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, reference can be made to each other. The key points described in each embodiment are the differences from other embodiments.

[0049] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting the present application; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.

Claims

1. An automatic calibration device for a pressure gauge, characterized in that, It includes a calibration table (1), on the upper surface of which there are provided a plurality of pressure gauge bases to be inspected (2), and a tapping unit (3) and an image acquisition unit (4) are respectively arranged outside each of the pressure gauge bases to be inspected (2); The image acquisition unit (4) and the tapping unit (3) are respectively electrically connected to a computer (5); The computer (5) is further connected to a pressure control unit (6), and the pressure control unit (6) is also respectively connected to the pressure gauge bases to be inspected (2) and a pressure generating unit (7).

2. The automatic pressure gauge calibration device according to claim 1, characterized in that, A plurality of enclosures (8) are further arranged around the calibration table (1), and a support rod (9) is connected to the outside of one of the enclosures (8).

3. The automatic calibration device for pressure gauges according to claim 2, characterized in that, The other end of the support rod (9) is connected to an extension rod (10). A plurality of connection holes are provided on the surfaces of the extension rod (10) and the support rod (9), and pins are arranged in the plurality of connection holes. The extension rod (10) and the support rod (9) are fixed in cooperation through the corresponding connection holes and pins.

4. An automatic pressure gauge calibration device according to claim 3, characterized in that, The other end of the extension rod (10) is further connected to a light source (11), and the light source (11) is arranged directly above the calibration table (1).

5. An automatic pressure gauge calibration device according to claim 1, characterized in that, Connection columns are provided on the surfaces of the plurality of pressure gauge bases to be inspected (2), internal threads are provided inside the connection columns, and the internal threads are connected to the external threads of the pressure gauges to be inspected.

6. An automatic pressure gauge calibration device according to claim 5, characterized in that, The tapping unit (3) includes a fixed rod, one end of the fixed rod is connected to a motor, the motor is electrically connected to the computer (5), the other end of the fixed rod is connected to a tapping rod, the other end of the tapping rod is connected to a tapping head, and the tapping head is arranged on one side of the pressure gauge to be inspected.

7. An automatic pressure gauge calibration device according to claim 1, characterized in that, A plurality of universal wheels are provided at the bottom of the calibration table (1).

8. An automatic pressure gauge calibration device according to claim 1, characterized in that, The pressure control unit (6) is arranged below the calibration table (1).

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