A standard metal measuring vessel verification operation device

Abstract

The utility model relates to a standard metal measuring vessel calibrating operation device, including frame body, the frame body top is equipped with the water storage jar, and standard metal measuring vessel is placed in the second layer of frame body, and the standard metal measuring vessel is placed in the first layer of frame body, the water storage jar is connected with standard metal measuring vessel through water pipe, and be equipped with water pump on the water pipe, the operating table surface of second layer is provided with hole, and the hole is used for through height difference and is transferred to the standard metal measuring vessel in the standard metal measuring vessel in the standard metal measuring vessel of being detected, one side of frame body is equipped with stairs, and the operating table is used to carry out standard metal measuring vessel calibration, can significantly improve the effect that the reliability of calibration data and operating efficiency reduce the labor intensity.

Description

Technical Field

[0001] This utility model relates to a standard metal measuring instrument calibration operating device, belonging to the field of measuring instrument calibration technology. Background Technology

[0002] The verification of standard metal measuring instruments according to JJG259-2005 "Verification Procedure for Standard Metal Measuring Instruments" involves multiple pieces of equipment, such as a lower water tank, upper water tank, water pump, limit pipe, pressure pump, return pump, and motor. A certain amount of time is required to empty the liquid from the standard metal measuring instrument under test, which can easily lead to leakage. Furthermore, the instrument needs to be moved to a higher location, which is time-consuming and labor-intensive, and can also cause data distortion, thus affecting the reliability of the verification results. To overcome the difficulties of non-automated verification, a low-cost, easy-to-operate integrated device is needed to solve the verification operation problems and improve the efficiency of standard metal measuring instrument verification. Utility Model Content

[0003] To address the aforementioned problems in the existing technology, this utility model provides a standard metal measuring instrument calibration operating device, which can significantly improve the reliability of calibration data and operational efficiency, while reducing labor intensity. The technical solution of this utility model is as follows:

[0004] A standard metal measuring instrument calibration operating device includes a frame, a water tank at the top of the frame, a standard metal measuring instrument placed on the second layer of the frame, and a metal measuring instrument to be tested placed on the first layer of the frame; the water tank is connected to the standard metal measuring instrument via a water pipe, and a water pump is provided on the water pipe; the operating surface of the second layer is provided with holes for transferring a fixed amount of water from the standard metal measuring instrument to the metal measuring instrument to be tested through a height difference; a staircase is provided on one side of the frame.

[0005] The second layer of the frame has a conical flow guide cavity fixed on the operating table. The top inlet of the conical flow guide cavity is connected to the outlet flange of the standard metal measuring instrument, and the bottom outlet is connected to the injection port of the metal measuring instrument being tested through a detachable hose.

[0006] The area above the water level in the water storage tank is a sealed air chamber, which is connected to the outside atmosphere through a breathing valve to maintain a normal pressure.

[0007] The conical flow guide cavity has a spiral flow guide rib on the inner wall of the middle section, and the rib spacing of the spiral flow guide rib decreases from the top to the bottom. The bottom of the conical flow guide cavity has radial straight ribs. The interior of the conical flow guide cavity is covered with a hydrophobic elastic layer.

[0008] The conical guide cavity has pressure equalization holes on its sidewalls, which are connected to the air chamber of the water storage tank via an air pipe. One end of the air pipe is connected to the pressure equalization hole of the conical guide cavity, and the other end of the air pipe penetrates the top shell of the water storage tank and extends to the middle region of the sealed air chamber. A U-shaped bend is provided at the end of the air pipe near the inlet of the water storage tank, and a high-density sealing liquid is injected into the bottom of the U-shaped bend.

[0009] This utility model has the following beneficial effects:

[0010] This invention achieves continuous, automated water flow transfer and precise flow guidance without manual inversion during the calibration process by placing the standard metal measuring instrument on the second layer and the metal measuring instrument under test on the first layer, along with the height difference formed by the holes in the operating table, and the air pressure balance siphon auxiliary flow channel formed by the conical flow guiding cavity communicating with the sealed air cavity of the water storage tank through its equalizing holes and air pipes. In conjunction with the spiral flow guiding ribs, radial straight ribs and hydrophobic elastic layer structure on the inner wall of the conical flow guiding cavity, this invention achieves the effects of eliminating liquid residue interference, avoiding air bubble blockage, significantly improving the reliability of calibration data and operational efficiency, and reducing labor intensity. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a half-sectional view of the conical flow guide cavity of this utility model.

[0013] The reference numerals in the figure are as follows:

[0014] 1. Frame; 2. Water tank; 3. U-shaped bend; 4. Radial straight ribs; 5. Standard metal measuring instrument; 6. Metal measuring instrument to be inspected; 7. Water pipe; 8. Water pump; 9. Hole; 10. Staircase; 11. Conical flow guide cavity; 12. Detachable hose; 13. Spiral flow guide rib; 15. Pressure equalization hole; 16. Air pipe; 21. Breathing valve. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0016] Please see Figures 1 to 2 The utility model provides a technical solution:

[0017] The standard metal measuring instrument calibration device of this embodiment includes a standard metal measuring instrument 5 and a metal measuring instrument 6 to be tested, and also includes a frame 1. A water tank 2 is provided on the top of the frame 1. The standard metal measuring instrument 5 is placed on the second layer of the frame 1, and the metal measuring instrument 6 to be tested is placed on the first layer of the frame 1. The water tank 2 is connected to the standard metal measuring instrument 5 through a water pipe 7, and a water pump 8 is provided on the water pipe 7. The operating table surface of the second layer is provided with holes 9, which are used to transfer a quantitative amount of water in the standard metal measuring instrument 5 to the metal measuring instrument 6 to be tested through the height difference. A staircase 10 is provided on one side of the frame 1.

[0018] Specifically, in the standard metal measuring instrument calibration device of this embodiment, the core workflow begins with the water storage tank 2 at the top of the frame 1, which serves as a stable water source storage point. When the calibration operation is started, the water pump 8 is activated, drawing water from the water storage tank 2 through the water pipe 7 and pressurizing it to deliver it to the standard metal measuring instrument 5 located on the second layer of the frame 1. At this stage, the standard metal measuring instrument 5 accurately measures and obtains the required calibration volume of water. Subsequently, in order to transfer the accurately measured water down to the metal measuring instrument 6 under test located on the first layer of the frame 1, the device cleverly utilizes the height difference between the layers: the holes 9 on the second-layer operating platform allow water to flow through. Under the action of gravity, the quantitative water released from the standard metal measuring instrument 5 naturally flows down through the channel formed by the holes 9 and accurately injects into the metal measuring instrument 6 under test on the first layer below. As a preferred option, any flow guiding structure that can realize water flow transfer, such as a water pipe, can be used. Meanwhile, the staircase 10 next to this device provides operators with a safe and convenient double-layer working platform passage, facilitating their monitoring of the equipment, starting and stopping the water pump, controlling the discharge of standard measuring instruments, and recording readings at different levels.

[0019] A conical flow guide cavity 11 is fixed on the operating table of the second layer of the frame 1. The top inlet of the conical flow guide cavity 11 is connected to the outlet flange of the standard metal measuring instrument 5, and the bottom outlet is connected to the injection port of the metal measuring instrument 6 under test through a detachable hose 12. The side wall of the conical flow guide cavity 11 is provided with a pressure equalization hole 15, which is connected to the air chamber of the water storage tank 2 through an air pipe 16 to form a siphon auxiliary flow channel.

[0020] The conical flow guide cavity 11 serves as the core flow guide hub. Its top inlet is rigidly connected to the outlet of the standard metal measuring instrument 5 via a flange, ensuring zero-leakage connection. The bottom outlet of the conical flow guide cavity 11 is flexibly connected to the injection port of the metal measuring instrument 6 under test via a detachable hose 12, enabling flexible switching between multiple work positions. The pressure equalization hole 15 on the side wall of the conical flow guide cavity 11 is connected to the sealed air chamber of the water storage tank 2 via an air pipe 16, forming a siphon flow channel. Specifically, when liquid flows from the standard measuring instrument 5 into the conical cavity 11, the sealed air chamber dynamically balances the air pressure inside and outside the cavity through the air pipe 16, which involves Pascal's law of hydrostatics. This eliminates the manual water injection step required for traditional siphon tube startup and avoids flow channel blockage caused by air bubble accumulation.

[0021] The area above the water level in the water tank 2 is a sealed air chamber, which is connected to the outside atmosphere through a breather valve 21 to maintain a normal pressure. One end of the air pipe 16 is connected to the pressure equalization hole 15 of the conical guide cavity 11, and the other end of the air pipe 16 penetrates the top shell of the water tank 2 and extends to the middle area of ​​the sealed air chamber. A U-shaped bend 3 is provided at the end of the air pipe 16 near the inlet of the water tank 2. A high-density sealing liquid, which is glycerin, is injected into the bottom of the U-shaped bend 3. The sealed air chamber above the water level in the water tank 2 is connected to the atmosphere through the breather valve 21 to maintain a normal pressure. One end of the air pipe 16 extends into the middle of the sealed air chamber, and the other end is connected to the pressure equalization hole 15 of the conical guide cavity 11, forming a bidirectional air pressure regulation channel. The U-shaped bend 3 at the end of the air pipe is filled with high-density glycerin sealing liquid to form a gravity liquid seal barrier.

[0022] The inner wall of the middle section of the conical flow guide cavity 11 is provided with a spiral flow guide rib 13. The rib spacing of the spiral flow guide rib 13 decreases from the top to the bottom. The pressure equalization hole 15 is opened in the middle section of the conical flow guide cavity 11. The bottom of the conical flow guide cavity 11 is provided with radial straight ribs 4. The interior of the conical flow guide cavity 11 is covered with a hydrophobic elastic layer.

[0023] The spiral guide ribs 13 on the inner wall of the conical guide cavity 11 adopt a decreasing rib spacing design, inducing the liquid to form a spiral flow with increasing acceleration. Centrifugal force throws the bubbles towards the central core area and discharges them through the equalizing hole 15. The radial straight ribs 4 at the bottom convert the rotating flow into axial laminar flow, preventing the liquid column from breaking. The hydrophobic elastic layer covering the entire inner wall reduces the amount of residue by reducing the solid-liquid adhesion work.

[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A standard metal measuring instrument calibration operating device, comprising a frame (1), characterized in that: The system includes a frame (1), a water tank (2) on top of the frame (1), a standard metal measuring instrument (5) on the second layer of the frame (1), and a metal measuring instrument (6) to be tested on the first layer of the frame (1). The water tank (2) is connected to the standard metal measuring instrument (5) via a water pipe (7), and a water pump (8) is provided on the water pipe (7). The operating table on the second layer has holes (9) for transferring a fixed amount of water from the standard metal measuring instrument (5) to the metal measuring instrument (6) to be tested through a height difference. A staircase (10) is provided on one side of the frame (1). A conical guide cavity (11) is fixed on the operating table on the second layer of the frame (1). The top inlet of the conical guide cavity (11) is connected to the outlet flange of the standard metal measuring instrument (5), and the bottom outlet is connected to the injection port of the metal measuring instrument (6) to be tested through a detachable hose (12). The conical guide cavity (11) is located above the water level in the water tank (2). The domain is a closed air chamber, which is connected to the outside atmosphere through a breathing valve (21) and maintains a normal pressure state. The inner wall of the middle section of the conical flow guide cavity (11) is provided with spiral flow guide ribs (13), and the rib spacing of the spiral flow guide ribs (13) decreases from the top to the bottom. The bottom of the conical flow guide cavity (11) is provided with radial straight ribs (4). The interior of the conical flow guide cavity (11) is covered with a hydrophobic elastic layer, and the side walls of the conical flow guide cavity (11) are provided with... The equalizing hole (15) is connected to the air chamber of the water storage tank (2) through the air pipe (16). One end of the air pipe (16) is connected to the equalizing hole (15) of the conical guide cavity (11), and the other end of the air pipe (16) passes through the top shell of the water storage tank (2) and extends to the middle area of ​​the sealed air chamber. A U-shaped bend (3) is provided at the end of the air pipe (16) near the inlet of the water storage tank (2), and a high-density sealing liquid is injected into the bottom of the U-shaped bend (3).

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