A standard metal measuring cylinder value transfer structure and method with height difference compensation

Abstract

The present application relates to the technical field of metrology, in particular to a standard metal measuring vessel value transfer structure and method with height difference compensation, comprising a working measuring vessel, a standard metal measuring vessel and a portable industrial computer, the standard metal measuring vessel and the working measuring vessel are fixedly arranged on the same horizontal working plane, a communication electromagnetic valve is arranged on the atmospheric communication port of the standard metal measuring vessel, the compressed gas electromagnetic valve is externally connected with a high-pressure gas source through a gas pipeline, a three-way electromagnetic valve is arranged at the drain port of the standard metal measuring vessel, the opening and closing of the compressed gas electromagnetic valve, the communication electromagnetic valve and the three-way electromagnetic valve are all controlled by the portable industrial computer, the structure and method adopt a pneumatic positive pressure driving mode to discharge the water in the standard metal measuring vessel placed on the ground into the working measuring vessel, and further realize automatic control to replace manual reading and manual water discharge, so that the safety and the value accuracy are guaranteed, and the automation is basically realized, and the labor intensity and the safety hidden danger of the workers are reduced.

Description

Technical Field

[0001] This invention relates to the field of metrology, specifically to a standard metal measuring instrument value transfer structure and method with height difference compensation. Background Technology

[0002] Currently, when the measurement value of a standard metal measuring instrument is transferred to the working measuring instrument of a water flow standard device (including water meter calibration devices), the natural flow method is often used. This involves allowing the liquid volume confirmed by the standard metal measuring instrument to flow naturally into the working measuring instrument under the influence of gravity. The standard metal measuring instrument has an outlet valve at its bottom, with the valve's height higher than the inlet at the top of the working measuring instrument. However, this method is inconvenient in practice and poses significant safety hazards. The inlet of the working measuring instrument, from which the measurement value is transferred, is typically more than 2 meters above the ground, while the outlet valve of the standard metal measuring instrument is located below it. This requires elevating the standard metal measuring instrument using a frame, ensuring its central axis is perpendicular to the ground, which is relatively difficult to achieve. Furthermore, when filling the inlet of the standard metal measuring instrument, operators must stand on a high platform to manually add water, and after determining the volume, manually open the outlet valve once or multiple times to allow the water to flow naturally into the working measuring instrument. This results in low automation and relatively poor precision in manual control. Therefore, overcoming these technical problems and defects is a key issue that needs to be addressed. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects described in the background art, thereby realizing a standard metal measuring instrument value transfer structure and method with height difference compensation. This structure and method uses a pneumatic positive pressure drive to drain water from the standard metal measuring instrument placed on the ground into the working measuring instrument, and further realizes automatic control to replace manual reading and manual water discharge. Under the condition of ensuring safety and measurement accuracy, it basically realizes automation, reducing the labor intensity and safety hazards of workers.

[0004] To achieve the above-mentioned objectives, the technical solution of the present invention is: a standard metal measuring instrument value transmission structure with height difference compensation, comprising a working measuring instrument, a standard metal measuring instrument, and a portable industrial control computer, wherein the standard metal measuring instrument and the working measuring instrument are fixedly arranged on the same horizontal working plane;

[0005] The top of the measuring neck of the standard metal measuring instrument is sealed by a sealing element. The sealing element is provided with an air inlet and an atmospheric inlet that communicate with the inside of the standard metal measuring instrument. A compressed gas solenoid valve is provided on the air inlet, and a connecting solenoid valve is provided on the atmospheric inlet. The compressed gas solenoid valve is connected to a high-pressure gas source through a gas pipeline.

[0006] A three-way solenoid valve is installed at the drain outlet of the standard metal measuring instrument. Another interface of the three-way solenoid valve is a water inlet, which is connected to the water inlet of the working measuring instrument through a water supply pipeline. The last interface of the three-way solenoid valve is a water injection port, which is connected to a tap water pipeline through a water injection pipeline. The opening and closing of the compressed gas solenoid valve, the connecting solenoid valve, and the three-way solenoid valve are all controlled by a portable industrial control computer.

[0007] A level gauge, specifically a float level gauge, is vertically mounted on the sealing element of the measuring neck of the standard metal volumetric instrument. The bottom of the level gauge extends to an appropriate position below the measuring neck of the standard metal volumetric instrument, and the signal from the level gauge is fed back to a portable industrial computer. A laser level sensor is mounted above the three-way solenoid valve at the drain outlet of the standard metal volumetric instrument, and the signal from the laser level sensor is fed back to the portable industrial computer.

[0008] In the above-mentioned standard metal measuring instrument value transmission structure with height difference compensation, the portable industrial control computer is a smart handheld device, and the model of the smart handheld device is HNJLY.

[0009] In addition, the present invention also discloses a method for transferring the measurement value of a standard metal measuring instrument with height difference compensation.

[0010] First, construct the standard metal measuring instrument value transmission structure with height difference compensation as described above, and set the number of times the portable industrial computer can transmit values ​​this time.

[0011] Next, the standard metal measuring vessel is filled with water: the portable industrial control computer controls the opening of the connecting solenoid valve to connect the inner cavity of the standard metal measuring vessel with the outside atmosphere, and at the same time controls the opening of the water inlet of the three-way solenoid valve. At this time, the water outlet of the three-way solenoid valve and the compressed gas solenoid valve are in the closed state, and the tap water in the tap water pipe is injected into the standard metal measuring vessel due to its own pressure.

[0012] When the water level reaches the bottom of the level gauge, the level gauge sends a feedback signal to the portable industrial computer. The portable industrial computer then controls the three-way solenoid valve to reduce the opening of the water inlet valve to 50%. As the water level rises, the level gauge sends a feedback signal to the portable industrial computer based on a predetermined volume value. The portable industrial computer then gradually reduces the opening of the three-way solenoid valve based on the feedback volume value until the displayed water level value equals the calibrated volume value of the standard metal measuring instrument. After this, the portable industrial computer controls the three-way solenoid valve to close the water inlet. After stabilizing for 10 seconds, the portable industrial computer records the corresponding volume value of the level gauge.

[0013] Next, the standard metal measuring vessel is drained to transfer the measurement value: The portable industrial control computer opens the water inlet of the three-way solenoid valve at the bottom of the standard metal measuring vessel, and at the same time closes the connecting solenoid valve at the top of the standard metal measuring vessel. Then, the compressed gas solenoid valve is opened, and the water in the standard metal measuring vessel is injected into the working measuring vessel through the water pipeline under the positive pressure of the high-pressure gas source. When the water level reaches the position of the laser liquid level sensor below the standard metal measuring vessel, the timer is set for 2 minutes, and the portable industrial control computer closes the water inlet of the three-way solenoid valve below the standard metal measuring vessel.

[0014] Finally, according to the number of measurement transmissions preset by the portable industrial computer, the portable industrial computer automatically controls the standard metal measuring instrument to perform water injection and discharge actions, and records the cumulative volume of water injected into the working measuring instrument for measurement transmission.

[0015] In the above-mentioned method for transferring the value of a standard metal measuring instrument with height difference compensation, the maximum permissible error of the level gauge is ±0.5mm, and the volume value of the standard metal measuring instrument at each liquid level is predetermined.

[0016] In the above-mentioned standard metal measuring instrument value transfer method with height difference compensation, the high-pressure gas source automatically pressurizes to above 400 kPa when the gas pressure is below 200 kPa to ensure the gas pressure.

[0017] The beneficial effects of the standard metal measuring instrument value transfer structure and method with height difference compensation of the present invention are as follows:

[0018] The present invention provides a standard metal measuring instrument value transfer structure and method with height difference compensation. This avoids the need for a natural flow form that creates a height difference during the value transfer process of the standard metal measuring instrument. Instead, it uses positive air pressure to drive water to inject the water of the standard metal measuring instrument into the working measuring instrument, thus eliminating the need to elevate the standard metal measuring instrument. It can be installed on the ground, which facilitates the posture adjustment of the standard metal measuring instrument and eliminates safety hazards.

[0019] The present invention relates to a standard metal measuring instrument value transfer structure and method with height difference compensation. Through a level gauge, solenoid valve, laser level sensor, and portable industrial control computer, the standard metal measuring instrument is automatically filled with water and the value is automatically transferred to the working measuring instrument. This replaces the manual method of climbing onto the elevated standard metal measuring instrument and manually operating the valve to control the liquid volume transfer, greatly reducing the labor intensity of the workers and significantly improving the accuracy of the liquid volume value. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the standard metal measuring instrument value transfer structure with height difference compensation according to the present invention.

[0021] Figure 2 yes Figure 1 A magnified structural diagram of A in the middle.

[0022] In the diagram: 1-Working volumetric instrument, 2-Standard metal volumetric instrument, 3-Portable industrial computer, 4-Connecting solenoid valve, 5-Compressed gas solenoid valve, 6-Three-way solenoid valve, 7-Level gauge, 8-Laser level sensor, 9-Water injection pipeline, 10-Gas pipeline, 11-Water delivery pipeline, 12-High-pressure gas source. Detailed Implementation

[0023] The following description, in conjunction with the accompanying drawings and specific embodiments, provides a more detailed account of the standard metal measuring instrument value transfer structure and method with height difference compensation of the present invention.

[0024] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] See Figure 1 This embodiment describes a standard metal measuring instrument value transfer structure and method with height difference compensation. It employs a pneumatic positive pressure drive to drain water from the standard metal measuring instrument placed on the ground into the working measuring instrument, further achieving automatic control to replace manual reading and manual water draining. Specifically, it includes a working measuring instrument, a standard metal measuring instrument, and a portable industrial control computer. The standard metal measuring instrument and the working measuring instrument are fixedly installed on the same horizontal working plane, generally on the ground, and leveled to meet their respective working requirements.

[0026] The measuring neck of the standard metal measuring instrument is sealed at the top by a sealing element. This sealing element can be a welded component or a flexible plug structure; these are conventional techniques and will not be elaborated upon here. See also Figure 2 The sealing element is provided with an air inlet and an atmospheric outlet that communicate with the inside of a standard metal measuring instrument. A compressed gas solenoid valve is provided on the air inlet, and a connecting solenoid valve is provided on the atmospheric outlet. The compressed gas solenoid valve is connected to a high-pressure gas source through a gas pipeline.

[0027] A three-way solenoid valve is installed at the drain outlet of the standard metal measuring instrument. Another port of the three-way solenoid valve is a water inlet, which is connected to the water inlet of the working measuring instrument via a water supply pipeline. The last port of the three-way solenoid valve is a water injection port, which is connected to a tap water pipe via a water injection pipeline. The opening and closing of the compressed gas solenoid valve, the connecting solenoid valve, and the three-way solenoid valve are all controlled by a portable industrial control computer. The portable industrial control computer is a smart handheld device, and in this embodiment, the model is HNJLY.

[0028] See Figure 1 A level gauge is vertically mounted on the sealing element of the measuring neck of the standard metal volumetric vessel. In this embodiment, the level gauge is a float level gauge. The bottom of the level gauge extends to an appropriate position below the measuring neck of the standard metal volumetric vessel, and the signal from the level gauge is fed back to a portable industrial control computer. A laser level sensor is mounted above the three-way solenoid valve at the drain outlet of the standard metal volumetric vessel. When the liquid level drops to the position of the laser level sensor, the laser level sensor generates an electrical signal, and the signal from the laser level sensor is fed back to the portable industrial control computer.

[0029] In addition, this embodiment also discloses a method for transferring the measurement values ​​of standard metal measuring instruments with height difference compensation.

[0030] First, construct the standard metal measuring instrument value transmission structure with height difference compensation as described above, and set the number of times the portable industrial computer can transmit values ​​this time.

[0031] Next, the standard metal measuring vessel is filled with water: the portable industrial control computer controls the opening of the connecting solenoid valve to connect the inner cavity of the standard metal measuring vessel with the outside atmosphere, and at the same time controls the opening of the water inlet of the three-way solenoid valve. At this time, the water outlet of the three-way solenoid valve and the compressed gas solenoid valve are in the closed state, and the tap water in the tap water pipe is injected into the standard metal measuring vessel due to its own pressure.

[0032] When the water level reaches the bottom of the level gauge, the level gauge sends a feedback signal to the portable industrial computer. The portable industrial computer then controls the three-way solenoid valve to reduce its opening to 50%. As the water level rises, the level gauge sends a feedback signal to the portable industrial computer based on a predetermined volume value. The portable industrial computer then gradually reduces the opening of the three-way solenoid valve based on the feedback volume value until the displayed water level equals the calibrated volume value of the standard metal measuring instrument. At this point, the portable industrial computer closes the three-way solenoid valve. After stabilizing for 10 seconds, the portable industrial computer records the corresponding volume value of the level gauge. A 10-second stabilization period is used as the relevant metrological standard. In this embodiment, the maximum permissible error of the level gauge is ±0.5mm, and the volume value of the standard metal measuring instrument at each water level is predetermined.

[0033] Next, the standard metal measuring vessel is drained to transfer the measurement value: The portable industrial control computer opens the water inlet of the three-way solenoid valve at the bottom of the standard metal measuring vessel, while simultaneously closing the connecting solenoid valve at the top of the standard metal measuring vessel. Then, it opens the compressed gas solenoid valve, allowing water from the standard metal measuring vessel to be injected into the working measuring vessel under the positive pressure of the high-pressure gas source through the water supply pipeline. Once the water level reaches the position of the laser level sensor below the standard metal measuring vessel, a timer is set for 2 minutes. The portable industrial control computer then closes the water inlet of the three-way solenoid valve below the standard metal measuring vessel. The 2-minute timer is specified according to relevant metrological standards. In this embodiment, the high-pressure gas source automatically pressurizes to above 400 kPa when the gas pressure is below 200 kPa to ensure adequate gas pressure.

[0034] Finally, according to the number of measurement transmissions preset by the portable industrial computer, the portable industrial computer automatically controls the standard metal measuring instrument to perform water injection and discharge actions, and records the cumulative volume of water injected into the working measuring instrument for measurement transmission.

[0035] The present invention relates to a standard metal measuring instrument value transfer structure and method with height difference compensation. The structure and method use pneumatic positive pressure to drain water from the standard metal measuring instrument placed on the ground into the working measuring instrument. Furthermore, it achieves automatic control to replace manual reading and manual water discharge. Under the condition of ensuring safety and measurement accuracy, it basically achieves automation, reducing the labor intensity and safety hazards of the staff.

[0036] Unless otherwise defined, the technical or scientific terms used herein should be understood in their ordinary sense as would be understood by one of ordinary skill in the art to which this invention pertains. The use of terms such as "a" or "an" in this specification and claims does not necessarily indicate a limitation of quantity. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0037] The exemplary embodiments of the present invention have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations can be made to the various technical features and structures proposed in the present invention without exceeding the protection scope of the present invention.

Claims

1. A standard metal measuring instrument value transfer structure with height difference compensation, characterized in that: It includes a working measuring instrument, a standard metal measuring instrument, and a portable industrial control computer, wherein the standard metal measuring instrument and the working measuring instrument are fixedly installed on the same horizontal working plane; The top of the measuring neck of the standard metal measuring instrument is sealed by a sealing element. The sealing element is provided with an air inlet and an atmospheric inlet that communicate with the inside of the standard metal measuring instrument. A compressed gas solenoid valve is provided on the air inlet, and a connecting solenoid valve is provided on the atmospheric inlet. The compressed gas solenoid valve is connected to a high-pressure gas source through a gas pipeline. A three-way solenoid valve is installed at the drain outlet of the standard metal measuring instrument. Another interface of the three-way solenoid valve is a water inlet, which is connected to the water inlet of the working measuring instrument through a water supply pipeline. The last interface of the three-way solenoid valve is a water injection port, which is connected to a tap water pipeline through a water injection pipeline. The opening and closing of the compressed gas solenoid valve, the connecting solenoid valve, and the three-way solenoid valve are all controlled by a portable industrial computer. A level gauge is vertically installed on the sealing element of the measuring neck of the standard metal volumetric instrument. The bottom of the level gauge extends to an appropriate position below the measuring neck of the standard metal volumetric instrument, and the signal of the level gauge is fed back to the portable industrial control computer. A laser level sensor is installed above the three-way solenoid valve at the drain outlet of the standard metal volumetric instrument, and the signal of the laser level sensor is fed back to the portable industrial control computer.

2. The standard metal measuring instrument value transfer structure with height difference compensation according to claim 1, characterized in that: The level gauge is a float level gauge.

3. The standard metal measuring instrument value transfer structure with height difference compensation according to claim 1, characterized in that: The portable industrial control computer is a smart handheld device, and the model of the smart handheld device is HNJLY.

4. A method for transferring the measurement value of a standard metal measuring instrument with height difference compensation, characterized in that: First, construct the standard metal measuring instrument value transmission structure with height difference compensation as described in any one of claims 1-3, and set the number of times the portable industrial computer can transmit values ​​this time; Next, the standard metal measuring vessel is filled with water: the portable industrial control computer controls the opening of the connecting solenoid valve to connect the inner cavity of the standard metal measuring vessel with the outside atmosphere, and at the same time controls the opening of the water inlet of the three-way solenoid valve. At this time, the water outlet of the three-way solenoid valve and the compressed gas solenoid valve are in the closed state, and the tap water in the tap water pipe is injected into the standard metal measuring vessel due to its own pressure. When the water level reaches the bottom of the level gauge, the level gauge sends a feedback signal to the portable industrial computer. The portable industrial computer then controls the three-way solenoid valve to reduce the opening of the water inlet valve to 50%. As the water level rises, the level gauge sends a feedback signal to the portable industrial computer based on a predetermined volume value. The portable industrial computer then gradually reduces the opening of the three-way solenoid valve based on the feedback volume value until the displayed water level value equals the calibrated volume value of the standard metal measuring instrument. After this, the portable industrial computer controls the three-way solenoid valve to close the water inlet. After stabilizing for 10 seconds, the portable industrial computer records the corresponding volume value of the level gauge. Next, the standard metal measuring vessel is drained to transfer the measurement value: The portable industrial control computer opens the water inlet of the three-way solenoid valve at the bottom of the standard metal measuring vessel, and at the same time closes the connecting solenoid valve at the top of the standard metal measuring vessel. Then, the compressed gas solenoid valve is opened, and the water in the standard metal measuring vessel is injected into the working measuring vessel through the water pipeline under the positive pressure of the high-pressure gas source. When the water level reaches the position of the laser liquid level sensor below the standard metal measuring vessel, the timer is set for 2 minutes, and the portable industrial control computer closes the water inlet of the three-way solenoid valve below the standard metal measuring vessel. Finally, according to the number of measurement transmissions preset by the portable industrial computer, the portable industrial computer automatically controls the standard metal measuring instrument to perform water injection and discharge actions, and records the cumulative volume of water injected into the working measuring instrument for measurement transmission.

5. The method for transferring the value of a standard metal measuring instrument with height difference compensation according to claim 4, characterized in that: The maximum permissible error of the level gauge is ±0.5mm, and the volume value of the standard metal measuring instrument corresponding to each liquid level is predetermined.

6. The method for transferring the value of a standard metal measuring instrument with height difference compensation according to claim 4, characterized in that: When the pressure of the high-pressure gas source is below 200 kPa, it automatically pressurizes to above 400 kPa.

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