A flow meter verification device

Abstract

The utility model provides a flowmeter calibrating device, including standard flowmeter, the flowmeter of being detected is connected with standard flowmeter through the communicating pipe, the pipe cover is set on the converter part of flowmeter of being detected, install the insertion strip on the pipe cover outer surface upper position, the guide rail board is equipped with on the pipe cover upside, the support is installed on the guide rail board outer surface, the insertion slot that is cooperated with insertion strip is seted up on the guide rail board lower surface, the insertion slot one end is closed, the insertion strip is inserted in the insertion slot, the insertion strip is connected with the guide rail board through the set screw, the utility model has the beneficial effect that: the manpower investment of one person maintaining position is dispensed with, and the single person can complete the replacement operation.

Description

Technical Field

[0001] This utility model is a flow meter calibration device, belonging to the field of flow meter technology. Background Technology

[0002] In the "standard meter method" for flowmeter calibration, the flowmeter under test and the standard flowmeter must be installed in series in the same infusion pipeline to ensure that the fluid flow rates through them are completely consistent. By comparing the flow rate readings of the two in real time, the measurement accuracy of the flowmeter under test is determined. The flowmeter under test is fixed to the infusion pipeline using bolts and flanges. Matching flanges are pre-installed at both ends of the pipeline. After aligning the flanges at both ends of the flowmeter under test with the pipeline flanges, bolts are inserted and nuts are tightened to form a sealed and secure connection, preventing fluid leakage from affecting the calibration accuracy.

[0003] When a flow meter to be tested has completed calibration and needs to be replaced, the cumbersome disassembly and assembly process exposes a significant manpower problem. The replacement operation requires first loosening and removing all bolts from the connecting flange, removing the calibrated flow meter from the pipeline, and then hoisting the new flow meter to be tested to the installation position. Since the flow meters to be tested (especially large-diameter models) are usually quite heavy, and the flange connection requires high installation precision, it is difficult for a single person to simultaneously handle both "precise positioning" and "bolt assembly": if only one person operates, the bolts cannot be installed simultaneously while adjusting the flow meter's position, which may cause the flow meter to shift, requiring repeated adjustments; if the position is fixed first and then the bolts are installed, the flange may be misaligned due to loosening, increasing the risk of rework. Therefore, in actual replacement, a two-person collaborative mode must be adopted: one person must hold the flow meter under test with both hands or use auxiliary tools to stabilize it, always keeping its flange aligned with the pipeline flange to avoid positional shift; the other person must insert the bolts into the flange holes one by one and tighten the nuts sequentially to ensure a secure connection. Throughout the replacement process, the two people need to work in close coordination. Any lack of coordination between the two parties may prolong the replacement time, which not only significantly increases the investment of human resources, but may also affect the accuracy and efficiency of subsequent verification due to cooperation errors. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a flow meter calibration device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flowmeter calibration device, comprising: Standard flow meter; The flow meter under test is connected to the standard flow meter via a connecting pipe; A sleeve is fitted onto the transmitter portion of the flow meter under test. A connector strip is installed on the upper part of the outer surface of the sleeve. A guide plate is provided on the upper side of the sleeve. A support is installed on the outer surface of the guide plate. A connector groove that mates with the connector strip is opened on the lower surface of the guide plate. One end of the connector groove is closed. The connector strip is inserted into the connector groove. The connector strip is connected to the guide plate by a positioning screw.

[0006] Furthermore, a hanging plate is installed on the upper part of the outer surface of the sleeve, a top plate is installed on the upper part of the hanging plate, and the plug strip is installed on the upper surface of the top plate.

[0007] Furthermore, a positioning hole is provided on one side of the connector strip, and a screw hole that mates with the positioning hole is provided on one side of the guide rail plate. The positioning screw is threaded into the screw hole, and one end of the positioning screw extends into the positioning hole.

[0008] Furthermore, a first elongated oval opening is provided on one side of the hanging plate, and the first elongated oval opening is arranged vertically.

[0009] Furthermore, the support includes a horizontal plate, a horizontal plate is installed on one side of the guide rail plate, a vertical plate is connected and fixed to the end of the horizontal plate away from the guide rail plate, a vertically arranged second elongated oval opening is opened on one side of the vertical plate, an upper semi-circular sleeve is installed at the lower end of the vertical plate, a lower semi-circular sleeve is provided below the upper semi-circular sleeve, the upper semi-circular sleeve is connected to the lower semi-circular sleeve by multiple sets of bolts, the connecting pipe is arranged in the space formed by the upper semi-circular sleeve and the lower semi-circular sleeve, a support leg is installed at the lower part of the outer surface of the lower semi-circular sleeve, and a base is installed at the lower end of the support leg.

[0010] Furthermore, an inlet valve is installed at the end of the standard flow meter away from the connecting pipe, an inlet pipe is installed at the end of the inlet valve away from the standard flow meter, a first shut-off valve is installed on the outer surface of the inlet pipe, and a pressure gauge is installed at the end of the first shut-off valve away from the inlet pipe.

[0011] Furthermore, a liquid outlet pipe is installed at the end of the flow meter to be tested away from the connecting pipe, a drain valve is installed at the end of the liquid outlet pipe away from the flow meter to be tested, and a second shut-off valve is installed at the lower part of the outer surface of the liquid outlet pipe.

[0012] Furthermore, the cross-section of the connector strip is "T" shaped, and the cross-section of the connector groove is "T" shaped.

[0013] The beneficial effects of this utility model are: The transmitter section of the flowmeter under test is fitted with a sleeve, which is connected to a "T"-shaped connector strip via a hanging plate and a top plate. The connector strip can slide along the "T"-shaped connector slot on the guide rail plate and is fixed by positioning screws. When replacing the flowmeter under test, no two people are needed to lift it. Simply loosen the positioning screws, and the flowmeter under test can be moved horizontally and removed along the connector slot. After the flowmeter under test slides along the connector slot to the installation position, tightening the positioning screws completes the initial positioning. This completely eliminates the need for one person to maintain the position, and the replacement operation can be completed by a single person. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a flowmeter calibration device according to the present invention; Figure 2 This is another perspective view of a flowmeter calibration device according to the present invention; Figure 3 This is an exploded structural diagram of the guide rail plate, support legs, and pipe sleeve in a flowmeter calibration device of this utility model; Figure 4 This is an exploded view of the guide rail plate, support legs, and pipe sleeve in a flowmeter calibration device of this utility model. In the picture: 1. Standard flow meter; 11. Connecting pipe; 2. Flow meter to be tested; 3. Pipe sleeve; 31. Hanging plate; 32. Positioning screw; 33. Guide rail plate; 34. Horizontal plate; 35. Vertical plate; 36. Upper semi-circular sleeve; 37. Support leg; 38. Base; 39. Top plate; 310. Insertion groove; 311. Lower semi-circular sleeve; 312. Insertion strip; 313. Positioning hole; 314. Screw hole; 4. Drain valve; 41. Discharge pipe; 42. Second shut-off valve; 5. Inlet valve; 51. Inlet pipe; 52. First shut-off valve; 53. Pressure gauge. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] Please see Figures 1-4This utility model provides a technical solution: a flow meter calibration device, including a standard flow meter 1, and a flow meter 2 to be tested connected to the standard flow meter 1 via a connecting pipe 11. An inlet valve 5 is installed at the end of the standard flow meter 1 furthest from the connecting pipe 11, and an inlet pipe 51 is installed at the end of the inlet valve 5 furthest from the standard flow meter 1. A first shut-off valve 52 is installed on the outer surface of the inlet pipe 51, and a pressure gauge 53 is installed at the end of the first shut-off valve 52 furthest from the inlet pipe 51. An outlet pipe 41 is installed at the end of the flow meter 2 furthest from the connecting pipe 11, and a drain valve 4 is installed at the end of the outlet pipe 41 furthest from the flow meter 2. A second shut-off valve 42 is installed at the lower part of the outer surface of the outlet pipe 41. The inlet pipe 51 of the standard flow meter 1 is sequentially equipped with an inlet valve 5, a first shut-off valve 52, and a pressure gauge 53. The outlet pipe 41 of the flow meter under test 2 is equipped with a drain valve 4 and a second shut-off valve 42. Before calibration, the first shut-off valve 52 can be opened, and the pressure gauge 53 can be used for real-time monitoring to ensure that the fluid pressure is stable within the calibration requirements. The drain valve 4 and the second shut-off valve 42 can control the start and stop of the flow and discharge, avoiding indication errors caused by fluctuations in operating conditions and ensuring the accuracy of the calibration data.

[0017] The sleeve 3 is fitted onto the transmitter part of the flow meter 2 under test. A hanging plate 31 is installed on the upper part of the outer surface of the sleeve 3, and a top plate 39 is installed on the upper end of the hanging plate 31. The plug strip 312 is installed on the upper surface of the top plate 39. The hanging plate 31 and the top plate 39 together serve to connect the sleeve 3 and the plug strip 312. A first elongated oval opening is opened on one side of the hanging plate 31. The first elongated oval opening is arranged vertically. The first elongated oval opening can reduce the amount of material used in the hanging plate 31 and reduce the overall weight of the equipment.

[0018] The upper side of the sleeve 3 is provided with a guide plate 33, and a horizontal plate 34 is installed on one side of the guide plate 33. A vertical plate 35 is connected and fixed to the end of the horizontal plate 34 away from the guide plate 33. A second elongated oval opening is opened on one side of the vertical plate 35. An upper semi-circular sleeve 36 is installed at the lower end of the vertical plate 35. A lower semi-circular sleeve 311 is provided on the lower side of the upper semi-circular sleeve 36. The upper semi-circular sleeve 36 is connected to the lower semi-circular sleeve 311 by multiple sets of bolts. The connecting pipe 11 is set in the space formed by the upper semi-circular sleeve 36 and the lower semi-circular sleeve 311. A support leg 37 is installed at the lower part of the outer surface of the lower semi-circular sleeve 311. A base 38 is installed at the lower end of the support leg 37. The base 38, support leg 37, upper semicircular sleeve 36 and lower semicircular sleeve 311 together support the connecting pipe 11 and improve the stability of the overall structure; the structure formed by the horizontal plate 34 and the vertical plate 35 connects the guide rail plate 33 and the upper semicircular sleeve 36, thereby restricting the position of the guide rail plate 33 and ensuring that the guide rail plate 33 is always in a horizontal state.

[0019] See Figures 1-4The lower surface of the guide rail plate 33 has a plug groove 310 that mates with the plug strip 312. One end of the plug groove 310 is closed. The plug strip 312, with a cross-section of "T", is inserted into the "T"-shaped plug groove 310. The plug strip 312 is connected to the guide rail plate 33 by a positioning screw 32. One side of the plug strip 312 has a positioning hole 313, and one side of the guide rail plate 33 has a screw hole 314 that mates with the positioning hole 313. The positioning screw 32 is threaded into the screw hole 314, and one end of the positioning screw 32 extends into the positioning hole 313. The transmitter part of the flow meter 2 under test is fitted with a sleeve 3. The sleeve 3 is connected to the "T"-shaped plug strip 312 through a hanging plate 31 and a top plate 39. The plug strip 312 can slide along the "T"-shaped plug groove 310 of the guide rail plate 33 and is fixed by the positioning screw 32. When replacing the flow meter 2 under test, there is no need for two people to lift it. Simply loosen the positioning screw 32 and move the flow meter 2 under test out along the insertion slot 310. After the flow meter 2 under test slides along the insertion slot 310 to the installation position, tighten the positioning screw 32 to complete the initial positioning. This completely eliminates the need for one person to maintain the position, and a single person can complete the replacement operation.

[0020] In traditional replacement processes, manually lifting the flow meter 2 under test can easily lead to it falling due to physical exhaustion. This device uses a guide rail plate 33 and a support structure to ensure smooth sliding and stable support of the flow meter 2 under test, preventing it from shaking or falling during replacement. The "T"-shaped mating structure of the plug strip 312 and the plug groove 310 provides guidance, and the closed end of the plug groove 310 limits the sliding stroke of the flow meter 2 under test, ensuring that it always maintains a preset alignment accuracy with the connecting pipe 11 without repeated adjustments. Compared to the flange misalignment problem that is prone to occur with traditional two-person collaboration, this structure significantly reduces installation errors, decreases the probability of rework, and improves replacement efficiency.

[0021] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A flow meter calibration device, characterized in that, include: Standard flow meter (1); The flow meter to be tested (2) is connected to the standard flow meter (1) through a connecting pipe (11); A sleeve (3) is fitted onto the transmitter part of the flow meter (2) to be tested. A plug strip (312) is installed on the upper part of the outer surface of the sleeve (3). A guide plate (33) is provided on the upper side of the sleeve (3). A support is installed on the outer surface of the guide plate (33). A plug groove (310) that cooperates with the plug strip (312) is opened on the lower surface of the guide plate (33). One end of the plug groove (310) is closed. The plug strip (312) is inserted into the plug groove (310). The plug strip (312) is connected to the guide plate (33) by a positioning screw (32).

2. The flowmeter calibration device according to claim 1, characterized in that: A hanging plate (31) is installed on the upper part of the outer surface of the sleeve (3), and a top plate (39) is installed on the upper end of the hanging plate (31). The plug strip (312) is installed on the upper surface of the top plate (39).

3. The flowmeter calibration device according to claim 2, characterized in that: The connector strip (312) has a positioning hole (313) on one side, and the guide rail plate (33) has a screw hole (314) on one side that matches the positioning hole (313). The positioning screw (32) is threaded into the screw hole (314), and one end of the positioning screw (32) extends into the positioning hole (313).

4. The flowmeter calibration device according to claim 2, characterized in that: The hanging plate (31) has a first elongated oval opening on one side, and the first elongated oval opening is arranged vertically.

5. A flowmeter calibration device according to claim 1, characterized in that: The support includes a horizontal plate (34), a horizontal plate (34) is installed on one side of the guide rail plate (33), a vertical plate (35) is fixedly connected to one end of the horizontal plate (34) away from the guide rail plate (33), a second elongated oval opening is opened on one side of the vertical plate (35), an upper semicircular sleeve (36) is installed at the lower end of the vertical plate (35), a lower semicircular sleeve (311) is provided on the lower side of the upper semicircular sleeve (36), the upper semicircular sleeve (36) is connected to the lower semicircular sleeve (311) by multiple sets of bolts, the connecting pipe (11) is set in the space formed by the upper semicircular sleeve (36) and the lower semicircular sleeve (311), a support leg (37) is installed at the lower part of the outer surface of the lower semicircular sleeve (311), and a base (38) is installed at the lower end of the support leg (37).

6. The flowmeter calibration device according to claim 1, characterized in that: The standard flow meter (1) is equipped with an inlet valve (5) at the end away from the connecting pipe (11), and an inlet pipe (51) is installed at the end of the inlet valve (5) away from the standard flow meter (1). A first shut-off valve (52) is installed on the outer surface of the inlet pipe (51), and a pressure gauge (53) is installed at the end of the first shut-off valve (52) away from the inlet pipe (51).

7. The flowmeter calibration device according to claim 1, characterized in that: The flow meter (2) under test is equipped with a liquid outlet pipe (41) at the end away from the connecting pipe (11), and a drain valve (4) is installed at the end of the liquid outlet pipe (41) away from the flow meter (2) under test. A second shut-off valve (42) is installed at the lower part of the outer surface of the liquid outlet pipe (41).

8. A flowmeter calibration device according to claim 1, characterized in that: The cross-section of the connector strip (312) is "T" shaped, and the cross-section of the connector groove (310) is "T" shaped.

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