Pipeline internal straightness measuring device

Abstract

The utility model belongs to the technical field of detection equipment, and discloses a pipeline internal straightness measuring device which comprises an inner diameter dial indicator, a clamping plate and a clamping sleeve, the clamping sleeve is arranged on one side of the clamping plate and extends away from the clamping plate, the clamping plate is adsorbed on a flange plate at the end of a pipeline, and the length direction of the clamping plate is perpendicular to the axial direction of the pipeline. A measuring rod of the inner diameter dial indicator is rotationally limited in the clamping hole, a hole shaft of the clamping hole is perpendicular to the length direction of the clamping plate, the axial direction of the inner diameter dial indicator is kept parallel to the axial direction of the pipeline through the arrangement, further, a measuring head of the inner diameter dial indicator abuts against the inner wall of the pipeline, and the inner diameter dial indicator is controlled to move in the axial direction of the inner diameter dial indicator; in the moving process, the pointer of the inner diameter dial indicator does not swing or slightly swings within the tolerance, the straightness of the pipeline meets the flow measurement requirement of the ultrasonic flowmeter, and in the moving process, the pointer of the inner diameter dial indicator swings beyond the tolerance, the straightness of the pipeline meets the flow measurement requirement of the ultrasonic flowmeter. And the straightness of the pipeline does not meet the flow measurement requirement of the ultrasonic flowmeter.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to a device for measuring the straightness of the inside of a pipeline. Background Technology

[0002] An ultrasonic flow meter is an instrument used to measure the flow rate of media such as gases (including natural gas) and liquids. Its working principle is based on the propagation characteristics of ultrasound in fluids. Natural gas flow measurement primarily employs time-of-flight (TOF) ultrasonic flow meters. TOF ultrasonic flow meters calculate the flow velocity by measuring the time difference required for an ultrasonic signal to travel through the natural gas in the direction of flow and against the flow, thus determining the flow rate. Specifically, ultrasound waves travel faster when traveling with the airflow and slower when traveling against it. Utilizing this difference, the flow velocity and flow rate of natural gas can be accurately calculated. TOF ultrasonic flow meters do not require direct contact with the medium during measurement, reducing the impact on fluid flow. They are suitable for flow measurement under various operating conditions and offer high measurement accuracy.

[0003] If the internal straightness of a natural gas pipeline does not meet the requirements, it will directly lead to irregular fluid velocity distribution and may also interfere with the propagation of ultrasonic signals, thereby affecting the accuracy of the measurement. Therefore, the straightness of the natural gas pipeline needs to be measured before flow measurement. Utility Model Content

[0004] The purpose of this invention is to provide a device for measuring the straightness of the inside of a pipeline, which can assist in measuring the straightness of the pipeline.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A device for measuring the straightness of an internal pipe includes a flange mounted at the end of the pipe, comprising an inside diameter dial indicator, a clamping plate, and a clamping sleeve. The clamping plate is attached to the flange and its length direction is perpendicular to the axial direction of the pipe. The clamping sleeve is disposed on one side of the clamping plate and extends away from the clamping plate. The probe of the inside diameter dial indicator is rotatably limited within the clamping hole of the clamping sleeve, and the hole of the clamping hole is axially aligned with the length direction of the clamping plate. The probe of the inside diameter dial indicator abuts against the inner wall of the pipe, and the inside diameter dial indicator is configured to move along its axial direction.

[0007] Preferably, the system also includes an adsorption unit, which comprises two adsorption elements located on the card plate. The two adsorption elements are spaced apart along the length of the card plate and adsorb onto the flange.

[0008] Preferably, the adsorption element is slidably limited to the card plate, and the sliding direction of the adsorption element is parallel to the length direction of the card plate.

[0009] Preferably, the card plate is provided with a slide along its length direction, the slide extends through the card plate along its thickness direction, and the adsorption element is limited to sliding within the slide.

[0010] Preferably, the adsorption component includes a connecting limiting rod and an adsorption plate, the limiting rod being inserted and axially limited in the slide rail, and the adsorption plate being adsorbed onto the flange.

[0011] Preferably, the adsorption unit further includes a fastening nut, which corresponds one-to-one with the adsorption element. The outer wall of the limiting rod is provided with an external thread, and the fastening nut is screwed onto the corresponding limiting rod so that the adsorption plate is pressed against the clamping plate.

[0012] Preferably, the upper surface of the card plate is provided with a clearance groove, the measuring rod is placed in the clearance groove, and the outer wall of the measuring rod is in contact with the groove wall of the clearance groove.

[0013] Preferably, the other side of the card plate has a scale along its length.

[0014] Preferably, the system also includes a data center, wherein the inner diameter dial indicator is an electronic dial indicator connected to the data center, and the data center is used to receive and process the measurement data of the inner diameter dial indicator.

[0015] Preferably, the system also includes a worktable, on which a drive unit is mounted. The drive unit includes a lead screw, a lead screw nut, a slider, a slide rail, a telescopic rod, and a drive component. The lead screw is rotatably mounted on the worktable. The lead screw nut is screwed onto the lead screw and connected to the slider. The slider is slidably connected to the slide rail, which is arranged axially along the pipe. One end of the telescopic rod is connected to the slider or the lead screw nut, and the other end is detachably connected to the measuring rod. The drive component drives the lead screw to rotate.

[0016] The beneficial effects of this utility model are:

[0017] This utility model provides a device for measuring the straightness of a pipeline, including an inner diameter dial indicator, a clamping plate, and a clamping sleeve. The clamping sleeve is disposed on one side of the clamping plate and extends away from the clamping plate. The clamping plate is adsorbed onto the flange at the end of the pipeline, and its length direction is perpendicular to the axial direction of the pipeline. The probe of the inner diameter dial indicator is limited to rotation in the clamping hole, and the hole axis of the clamping hole is perpendicular to the length direction of the clamping plate. Through the above arrangement, the axial direction of the inner diameter dial indicator is kept parallel to the axial direction of the pipeline. Furthermore, the probe of the inner diameter dial indicator is pressed against the inner wall of the pipeline, and the inner diameter dial indicator is controlled to move along its own axial direction, that is, along the axial direction of the pipeline. When the pointer of the inner diameter dial indicator does not swing or swings slightly within the tolerance during the movement, the straightness of the pipeline meets the requirements for measuring the flow rate of the ultrasonic flow meter. When the pointer of the inner diameter dial indicator swings beyond the tolerance during the movement, the straightness of the pipeline does not meet the requirements for measuring the flow rate of the ultrasonic flow meter. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the inner diameter dial indicator provided in this embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of a pipe internal straightness measuring device provided in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the card provided in this embodiment of the utility model;

[0021] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0022] Figure 5 This is an assembly diagram of the adsorption component and fastening nut provided in this embodiment of the utility model;

[0023] Figure 6 This is a cross-sectional view of a portion of the structure (excluding the dial gauge) of a pipe internal straightness measuring device provided in an embodiment of this utility model.

[0024] In the picture:

[0025] 10. Flange; 1. Inner diameter dial indicator; 11. Measuring head; 12. Measuring rod; 13. Indicator head; 2. Clamping plate; 21. Slide rail; 22. Adsorption component; 221. Limiting rod; 222. Adsorption plate; 23. Fastening nut; 24. Clearance groove; 3. Clamping sleeve. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] This embodiment provides a pipe internal straightness measuring device, which can assist in measuring the straightness of the pipe to ensure the accuracy of the measurement structure of fluid flow rate inside the pipe.

[0031] To facilitate connection, existing natural gas pipelines have flanges installed at their ends. By bolting the flanges between adjacent pipeline sections, the two ends of the pipeline can be connected, which facilitates disassembly and prevents gas leakage.

[0032] Please see Figures 1 to 6The pipe internal straightness measuring device includes an inner diameter dial gauge 1. For example, the inner diameter dial gauge 1 is placed with its axis parallel to the pipe's axis. Its measuring head 11 is inserted into the pipe, and the measuring head of the inner diameter dial gauge 1 is controlled to abut against the inner wall of the pipe. The inner diameter dial gauge 1 is moved along its own axis, that is, along the pipe's axis. It is understood that if the pointer of the inner diameter dial gauge 1 does not swing or exhibits only slight swing within tolerance during the movement, the pipe's straightness meets the requirements for flow measurement by the ultrasonic flow meter. If the pointer of the inner diameter dial gauge 1 swings beyond tolerance during the movement, the pipe's straightness does not meet the requirements for flow measurement by the ultrasonic flow meter.

[0033] The dial indicator 1 is a commonly used device; please refer to [link / reference]. Figure 1 It typically consists of a measuring rod 12, a measuring head 11, and a meter head 13. The measuring head is located at the end of the measuring head 11, and its specific structure will not be described in detail here.

[0034] Please see Figure 2 The pipe internal straightness measuring device also includes a clamping plate 2, which is used to connect the inner diameter dial indicator 1 and the flange 10.

[0035] Specifically, the clamping plate 2 can be attached to the flange 10, and the length direction of the clamping plate 2 is perpendicular to the axial direction of the pipe.

[0036] The adsorption connection between the card plate 2 and the flange 10 is achieved through an adsorption unit. Please refer to [link / reference]. Figure 2 and Figure 3 The adsorption unit includes two adsorption elements 22. For example, in this embodiment, the adsorption elements 22 are made of strong magnets so that they can be adsorbed onto the flange 10.

[0037] In some feasible embodiments, two adsorption elements 22 are spaced apart along the length of the clamping plate 2, and the adsorption elements 22 can also be confined within the clamping plate 2. With the above arrangement, the adsorption elements 22 are confined within the clamping plate 2 and adsorbed onto the flange 10, thereby connecting the clamping plate 2 and the flange 10. By spaced apart along the length of the clamping plate 2, the two adsorption elements 22 are respectively adsorbed onto both sides of the axis of the flange 10 to ensure the stability of the clamping plate 2 relative to the flange 10. At the same time, the clamping plate 2 can span the pipeline to ensure that the subsequent inner diameter dial indicator 1 can extend into the interior of the pipeline.

[0038] Optionally, the suction element 22 is limited to sliding on the clamping plate 2, and the sliding direction of the suction element 22 is parallel to the length direction of the clamping plate 2, thereby facilitating the adjustment of the position of the suction element 22 according to the specifications of the flange 10. Preferably, the clamping plate 2 is provided with graduations along its length direction so as to pre-adjust the spacing between the two suction elements 22 according to the specifications of the flange 10.

[0039] Please see Figure 3 and Figure 4 The card plate 2 is provided with a slide 21 along its length direction. The slide 21 extends through the card plate 2 along its thickness direction. The adsorption member 22 is located in the slide 21. The slide 21 is located in the middle area of ​​the width direction of the card plate 2.

[0040] This embodiment provides a sliding connection structure between the adsorption element 22 and the card plate 2. For details, please refer to [link to relevant documentation]. Figure 4 and Figure 5 The adsorption component 22 includes a connecting limiting rod 221 and an adsorption plate 222. The limiting rod 221 is inserted and axially limited in the slide 21 and can slide along the slide 21. The top and bottom ends of the limiting rod 221 abut against the slide 21 to prevent shaking during the sliding process. The adsorption plate 222 is adsorbed onto the flange 10.

[0041] Further, please refer to Figure 5 The adsorption unit also includes a fastening nut 23 for axially limiting the limiting rod 221. Specifically, the fastening nut 23 corresponds one-to-one with the adsorption component 22. The outer wall of the limiting rod 221 is provided with external threads. The fastening nut 23 is screwed onto its corresponding limiting rod 221. By tightening the fastening nut 23, the fastening nut 23 can drive the clamping plate 2 to move in the direction close to the adsorption disk 222 until the clamping plate 2 is pressed against the adsorption disk 222, thereby realizing the connection between the clamping plate 2 and the adsorption disk 222.

[0042] Please see Figure 6 The pipe internal straightness measuring device also includes a clamping sleeve 3, which is disposed on one side of the clamping plate 2 and extends away from the clamping plate 2. The measuring rod 12 of the inner diameter dial gauge 1 is rotatably limited in the clamping hole of the clamping sleeve 3, and the hole axis of the clamping hole is perpendicular to the length direction of the clamping plate 2. Through the clamping sleeve 3 with a certain length, it is ensured that after the measuring rod 12 is clamped in the clamping hole, its axis is parallel to the axis of the pipe, thereby ensuring the accuracy of the straightness measurement data.

[0043] The clamping sleeve 3 is welded to one side of the clamping plate 2 to ensure sufficient connection strength, and the scale is set on the other side of the clamping plate 2 so that the scale value can be observed from the outside.

[0044] Preferably, please refer to Figure 3 and Figure 6 The upper surface of the clamping plate 2 is provided with a relief groove 24. It can be understood that the relief groove 24 is directly opposite the clamping hole, and the measuring rod 12 is placed in the relief groove 24 and can be clamped in the clamping hole. By providing the relief groove 24, the clamping plate 2 is prevented from obstructing the clamping of the measuring rod 12. More preferably, the outer wall of the measuring rod 12 is in contact with the groove wall of the relief groove 24, which further improves the limiting effect on the measuring rod 12.

[0045] In some feasible embodiments, the pipe internal straightness measuring device also includes a data center. The inner diameter dial gauge 1 is an electronic dial gauge, which is connected to the data center via a transmission line or wirelessly. The measurement data of the inner diameter dial gauge 1 during its axial movement is transmitted to the data center. The data center receives and processes the measurement data of the inner diameter dial gauge 1 and directly determines whether the straightness of the pipe meets the requirements.

[0046] In some feasible embodiments, the movement of the inner diameter dial indicator 1 along its axial direction is achieved by manual movement by the operator, which facilitates operation and carrying.

[0047] In other feasible embodiments, the pipe internal straightness measuring device also includes a worktable (not shown in the figure). A drive unit is mounted on the worktable, and the movement of the dial indicator 1 along its axial direction is achieved by the drive unit, making it easier to control the movement of the dial indicator 1 and reducing the probability of directional deviation. For example, the drive unit includes a lead screw, a lead screw nut, a slider, a slide rail, a telescopic rod, and a drive component. The lead screw is rotatably mounted on the worktable, the lead screw nut is screwed onto the lead screw, one side of the lead screw nut is connected to the slider, the slider is slidably connected to the slide rail, and the slide rail is mounted on the worktable surface along the axial direction of the pipe. One end of the telescopic rod can be connected to either the slider or the lead screw nut, and the other end of the telescopic rod is detachably connected to the measuring rod 12. The drive component drives the lead screw to rotate. With the above structural configuration, before measurement, the length of the telescopic rod is adjusted to connect the other end of the telescopic rod to the measuring rod 12, controlling the drive component's operation. The lead screw rotates, causing the lead screw nut and slider to slide along the slide rail, thereby driving the measuring rod 12 to move synchronously via the telescopic rod, that is, moving along the axial direction of the pipe.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A device for measuring the straightness of an internal pipe, wherein a flange (10) is installed at the end of the pipe, characterized in that, The instrument includes an inner diameter dial indicator (1), a clamping plate (2), and a clamping sleeve (3). The clamping plate (2) is attached to the flange (10) and its length direction is perpendicular to the axial direction of the pipe. The clamping sleeve (3) is disposed on one side of the clamping plate (2) and extends away from the clamping plate (2). The measuring rod (12) of the inner diameter dial indicator (1) is rotatably limited in the clamping hole of the clamping sleeve (3), and the hole of the clamping hole is axial in the length direction of the clamping plate (2). The measuring head of the inner diameter dial indicator (1) abuts against the inner wall of the pipe. The inner diameter dial indicator (1) is configured to move along its axial direction.

2. The pipe internal straightness measuring device according to claim 1, characterized in that, It also includes an adsorption unit, which includes two adsorption elements (22) located on the card plate (2), the two adsorption elements (22) being spaced apart along the length direction of the card plate (2) and adsorbed onto the flange (10).

3. The pipe internal straightness measuring device according to claim 2, characterized in that, The adsorption element (22) slides within the card plate (2), and the sliding direction of the adsorption element (22) is parallel to the length direction of the card plate (2).

4. The pipe internal straightness measuring device according to claim 3, characterized in that, The card plate (2) is provided with a slide (21) along its length direction. The slide (21) penetrates the card plate (2) along its thickness direction. The adsorption member (22) slides within the slide (21).

5. A pipe internal straightness measuring device according to claim 4, characterized in that, The adsorption component (22) includes a connecting limiting rod (221) and an adsorption plate (222). The limiting rod (221) is inserted and axially limited in the slide (21), and the adsorption plate (222) is adsorbed onto the flange (10).

6. A pipe internal straightness measuring device according to claim 5, characterized in that, The adsorption unit also includes a fastening nut (23), which corresponds one-to-one with the adsorption element (22). The outer wall of the limiting rod (221) is provided with an external thread, and the fastening nut (23) is screwed to the corresponding limiting rod (221) so that the adsorption plate (222) abuts against the card plate (2).

7. A pipe internal straightness measuring device according to any one of claims 2-6, characterized in that, The upper end face of the card plate (2) is provided with a relief groove (24), the measuring rod (12) is placed in the relief groove (24), and the outer wall of the measuring rod (12) is attached to the groove wall of the relief groove (24).

8. A pipe internal straightness measuring device according to any one of claims 2-6, characterized in that, The other side of the card plate (2) is provided with a scale along its length.

9. A pipe internal straightness measuring device according to any one of claims 1-6, characterized in that, It also includes a data center, wherein the inner diameter dial indicator (1) is an electronic dial indicator connected to the data center, and the data center is used to receive and process the measurement data of the inner diameter dial indicator (1).

10. A pipe internal straightness measuring device according to any one of claims 1-6, characterized in that, It also includes a workbench, on which a drive unit is installed. The drive unit includes a lead screw, a lead screw nut, a slider, a slide rail, a telescopic rod, and a drive component. The lead screw is rotatably mounted on the workbench. The lead screw nut is screwed to the lead screw and connected to the slider. The slider is slidably connected to the slide rail arranged along the axial direction of the pipe. One end of the telescopic rod is connected to the slider or the lead screw nut, and the other end is detachably connected to the measuring rod (12). The drive component drives the lead screw to rotate.

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