Novel pipeline drift diameter measuring instrument

Abstract

The utility model discloses a novel pipeline drift diameter measuring instrument, and relates to a pipeline drift diameter measuring technology. Comprising a supporting mechanism and a measuring mechanism, the supporting mechanism comprises a central pipe, a supporting assembly and a rotary sliding sleeve, and the measuring mechanism is installed at one end of the central pipe; and the supporting assemblies each comprise a rocker arm, an electric roller and an elastic telescopic rod, and when the rocker arms swing in the direction close to the center pipe, the elastic telescopic rods can provide elastic supporting for the rocker arms. The outer side of the rotary sliding sleeve is connected with two threaded sleeves, and the two threaded sleeves can be close to or away from each other by rotating the rotary sliding sleeve. The rotary sliding sleeve is connected between the front supporting assembly and the rear supporting assembly, so that the two supporting assemblies can be linked, when one supporting assembly advances to the drift diameter variable area section and encounters resistance, the resistance-encountering supporting assembly shrinks inwards and then can pass through the resistance-encountering section more easily, and meanwhile after the resistance-encountering supporting assembly shrinks inwards, the resistance-encountering section can pass through the resistance-encountering section more easily. And the contact pressure between the electric roller without resistance and the pipe wall can be increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal pipe wall thickness measurement technology, especially a kind of novel pipe diameter measuring instrument, it is applicable to the on-line monitoring and maintenance of metal pipeline in petroleum, chemical industry, metallurgy and other industries. BACKGROUND

[0002] Pipeline is a kind of fluid conveying facility commonly used in industrial production, and the diameter of the pipeline will change due to corrosion, scaling, extrusion and other factors after a period of use, so it is necessary to use a diameter measuring device to measure the diameter of the pipeline.

[0003] Patent No. CN201320409840.4 discloses a kind of inner diameter measuring pipeline robot, its structure includes support mechanism and measuring mechanism, inner diameter measuring pipeline robot is supported on the inner wall of the pipeline to be measured by relying on the electric roller in support mechanism and realizes the walking in pipeline by power, measuring mechanism is connected with support mechanism, thereby the diameter of multiple points in the length direction of pipeline is measured. In order to ensure the stability and centring of the support of measuring mechanism, the above technical solution is provided with two groups of electric rollers in support mechanism, at the same time, in order to make the diameter measuring device adapt to the diameter measurement of different diameter pipelines, the position of support point of support mechanism in the pipeline to be measured is adjustable (i.e. the position of electric roller is adjustable), many similar other technical solutions also adopt this design.

[0004] The problem existing in the above prior art is that during walking in the pipeline to be measured, when encountering pipe section with changed inner diameter, the passability of diameter measuring device is poor under the conditions of wet and slippery pipe wall, large pipe wall inclination and the like. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of novel pipe diameter measuring instrument, the purpose is to improve the passability by improving the support structure in diameter measuring device.

[0006] The technical problem solved by the utility model is realized by the following technical solution: the utility model provides a kind of novel pipe diameter measuring instrument, including support mechanism and measuring mechanism, support mechanism includes:

[0007] Center pipe, the measuring mechanism is installed in one end of center pipe;

[0008] The support assembly includes a rocker arm, an electric roller, and a flexible telescopic rod. One end of the rocker arm is hinged to the outside of the central tube, the electric roller is installed at the other end of the rocker arm, and one end of the flexible telescopic rod is hinged to the inside of the rocker arm. When the rocker arm swings towards the central tube, the flexible telescopic rod can provide elastic support. The support assembly is divided into two groups, front and rear, each group containing at least two sets of support assemblies, and each set of support assemblies is evenly distributed along the circumference.

[0009] The rotating sleeve has two threaded sleeves connected to its outer side by left-hand and right-hand threads respectively. The two threaded sleeves are hinged to the ends of the elastic telescopic rods in the front and rear support assemblies respectively. By rotating the rotating sleeve, the two threaded sleeves can be moved closer or further apart, thereby adjusting the angle between the rocker arm in the support assembly and the central tube to accommodate pipes of different diameters.

[0010] When the inner diameters supported by the front and rear support components are different, the rotating sleeve can slide along the axis of the central tube under the force applied by the front and rear support components to achieve dynamic balance between the front and rear support components.

[0011] As a preferred embodiment, the inner side of the rotating sleeve is machined with gear teeth, and a gear transmission mechanism is provided inside the central tube, which can drive the rotating sleeve to rotate.

[0012] As a preferred embodiment, the gear transmission mechanism includes a handle, a central gear rod, an intermediate gear, and a gear carrier. The handle is rotatably mounted on the outer end of the central tube, and the gear carrier is fixedly mounted inside the central tube. One end of the central gear rod is fixedly connected to the handle, and the outer side of the other end is provided with gear teeth and mounted in the center of the gear carrier. The intermediate gear meshes with the central gear rod and the rotating sleeve respectively, thereby transmitting the driving force from the handle to the rotating sleeve, enabling it to rotate.

[0013] As a preferred embodiment, the handle is equipped with a motor, and the end of the central gear rod is fixedly connected to the output shaft of the motor.

[0014] As a preferred embodiment, each set of support components contains two sets of support components, and after connecting the two electric rollers contained in each of the front and rear sets of support components, the two connecting lines are perpendicular to each other.

[0015] The beneficial effects of this utility model are:

[0016] This utility model incorporates a rotating sliding sleeve between the front and rear sets of support components, which enables multiple functions:

[0017] First, the rotating sliding sleeve connects the front and rear sets of support components, enabling the two sets of support components to move in tandem. When one set of support components encounters an obstruction in a section where the diameter changes, the obstructed support component retracts inward and passes through the obstructed section more easily. At the same time, the inward retraction of the obstructed support component increases the contact pressure between the unobstructed electric roller and the pipe wall through tandem, thereby improving the passability of this invention by increasing the friction between the unobstructed electric roller and the pipe wall.

[0018] Secondly, by rotating the sliding sleeve, all the arms in the front and rear support assemblies can be moved closer to or further away from the central tube, thus adapting to pipes of different diameters. Furthermore, the movements of the front and rear support assemblies are completely synchronized during the rotation of the sliding sleeve, ensuring that the central tube is always as close as possible to the centerline of the pipe under test, guaranteeing the alignment of the measuring mechanism connected to the central tube. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0021] In the diagram: 1. Handle; 2. Rocker arm; 3. Electric roller; 4. Elastic telescopic rod; 5. Threaded sleeve; 6. Rotary sliding sleeve; 7. Measuring mechanism; 8. Central gear rod; 9. Gear frame; 10. Intermediate gear. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] like Figure 1 As shown, this embodiment includes a support mechanism and a measuring mechanism 7. The above structure is a widely existing structure in the prior art, and will not be described in detail here.

[0024] like Figure 1 As shown, the support mechanism in this embodiment includes a central tube, a support assembly, and a rotating sliding sleeve 6. The measuring mechanism 7 is installed at one end of the central tube.

[0025] like Figure 1 As shown in this embodiment, the support assembly includes a rocker arm 2, an electric roller 3, and an elastic telescopic rod 4. One end of the rocker arm 2 is hinged to the outside of the central tube, the electric roller 3 is mounted on the other end of the rocker arm 2, and one end of the elastic telescopic rod 4 is hinged to the inside of the rocker arm 2. When the electric roller 3 rolls to the section of the tube with a reduced diameter (i.e., when the rolling is obstructed), the rocker arm 2 is forced to swing towards the central tube, at which time the elastic telescopic rod 4 can provide elastic support.

[0026] likeFigure 1 As shown, in this embodiment, the support components are divided into two groups, front and rear, with each group containing at least two sets of support components. These sets of support components are evenly distributed along the circumference. Dividing the support components into two groups facilitates stable support for the central tube.

[0027] like Figure 1 As shown, in this embodiment, a rotating sleeve 6 has two threaded sleeves 5 connected to its outer side via left-hand and right-hand threads, respectively. Rotating the rotating sleeve 6 allows the two threaded sleeves 5 to move synchronously closer or further apart. The two threaded sleeves 5 are hinged to the ends of the elastic telescopic rods 4 in the front and rear support assemblies. Rotating the rotating sleeve 6 moves the two threaded sleeves 5, adjusting the angle between the rocker arm 2 in the support assembly and the central tube to accommodate pipes of different diameters. Rotating the rotating sleeve 6 allows all the arms in the front and rear support assemblies to move closer or further away from the central tube, thus adapting to pipes of different diameters. Furthermore, during the rotation of the rotating sleeve 6, the movements of the front and rear support assemblies are completely synchronized, ensuring that the central tube always approaches the centerline of the pipe under test to the maximum extent possible, guaranteeing the alignment of the measuring mechanism 7 connected to the central tube.

[0028] Furthermore, when a set of support components encounters obstruction in a section where the diameter changes, the difference in the inner diameter supported by the two sets of support components disrupts the original force balance of the rotating sleeve 6. This causes the rotating sleeve 6 to slide along the axis of the central tube under the force applied by the two sets of support components, thus achieving dynamic balance between the two sets of support components. The obstructed support component retracts inward, making it easier to pass through the obstructed section. Simultaneously, the inward retraction of the obstructed support component increases the contact pressure between the unobstructed electric roller 3 and the pipe wall through linkage, improving the passability of this invention by increasing the friction between the unobstructed electric roller 3 and the pipe wall.

[0029] like Figure 1 , 2 As shown, in this embodiment, the inner side of the rotating sleeve 6 is machined with gear teeth, and a gear transmission mechanism is provided inside the central tube. The rotating sleeve 6 can be driven to rotate through the gear transmission mechanism, which helps to improve the convenience of operation.

[0030] like Figure 1 , 2 As shown, in this embodiment, the gear transmission mechanism includes a handle 1, a central gear rod 8, an intermediate gear 10, and a gear carrier 9. The handle 1 is rotatably mounted on the outer end of the central tube, so that the rotation adjustment action of the rotating sleeve 6 can be performed after the present invention is placed into the pipe, thereby making it easy to place the present invention into the pipe to be tested.

[0031] like Figure 2As shown, the gear carrier 9 is fixedly installed inside the central tube. In this embodiment, a window is machined on the side of the central tube, through which the gear carrier 9 is laterally inserted and fixed inside the central tube.

[0032] like Figure 2 As shown, one end of the central gear rod 8 is fixedly connected to the handle 1, and the outer side of the other end is provided with gear teeth and installed in the center of the gear frame 9. The intermediate gear 10 meshes with the central gear rod 8 and the rotating sleeve 6 respectively, thereby transmitting the driving force from the handle 1 to the rotating sleeve 6, so that it can rotate.

[0033] In a specific implementation, a motor can also be installed in the handle 1 (the motor and the measuring mechanism 7 share a power supply), and the end of the central gear rod 8 can be fixedly connected to the output shaft of the motor. In this way, the rotation adjustment action of the rotating sleeve 6 can be realized by electricity.

[0034] In practice, to ensure support stability, each support assembly group generally needs to contain three or four sets of support assemblies (four sets per group in this embodiment). Alternatively, when the requirements are not high, each group can also contain two sets of support assemblies. However, in this case, the front and rear support assemblies must be circumferentially staggered. Ideally, the two electric rollers 3 contained in each of the front and rear support assemblies should be connected by lines that are perpendicular to each other to ensure support stability.

Claims

1. A novel pipe diameter measuring instrument, comprising a support mechanism and a measuring mechanism (7), characterized in that, Supporting institutions include: The measuring mechanism (7) is installed at one end of the central tube; The support assembly includes a rocker arm (2), an electric roller (3), and an elastic telescopic rod (4). One end of the rocker arm (2) is hinged to the outside of the central tube, the electric roller (3) is installed at the other end of the rocker arm (2), and one end of the elastic telescopic rod (4) is hinged to the inside of the rocker arm (2). When the rocker arm (2) swings towards the central tube, the elastic telescopic rod (4) can provide elastic support for it. The support assembly is divided into two groups, front and rear, each group containing at least two sets of support assemblies, and each set of support assemblies is evenly distributed along the circumference. Rotary sliding sleeve (6), the outer side of the rotating sliding sleeve (6) is connected to two threaded sleeves (5) by left-hand thread and right-hand thread respectively. The two threaded sleeves (5) are respectively hinged to the ends of the elastic telescopic rods (4) in the front and rear support assemblies. By rotating the rotating sliding sleeve (6), the two threaded sleeves (5) can be brought closer or further away from each other, thereby adjusting the angle between the rocker arm (2) in the support assembly and the central tube to adapt to pipes of different diameters; When the inner diameters supported by the front and rear support components are different, the rotating sleeve (6) can slide along the axis of the central tube under the force applied by the front and rear support components to achieve dynamic balance between the front and rear support components.

2. The novel pipe diameter measuring instrument according to claim 1, characterized in that: The inner side of the rotating sleeve (6) is machined with gear teeth, and a gear transmission mechanism is provided inside the central tube. The rotating sleeve (6) can be driven to rotate through the gear transmission mechanism.

3. The novel pipe diameter measuring instrument according to claim 2, characterized in that: The gear transmission mechanism includes a handle (1), a central gear rod (8), an intermediate gear (10), and a gear carrier (9). The handle (1) is rotatably mounted on the outer end of the central tube, and the gear carrier (9) is fixedly mounted inside the central tube. One end of the central gear rod (8) is fixedly connected to the handle (1), and the other end has gear teeth on its outer side and is mounted in the center of the gear carrier (9). The intermediate gear (10) meshes with the central gear rod (8) and the rotating sleeve (6) respectively, thereby transmitting the driving force from the handle (1) to the rotating sleeve (6) so that it can rotate.

4. The novel pipe diameter measuring instrument according to claim 3, characterized in that: The handle (1) is equipped with a motor, and the end of the central gear rod (8) is fixedly connected to the output shaft of the motor.

5. A novel pipe diameter measuring instrument according to claim 1, characterized in that: Each set of support components contains two sets of support components, and after connecting the two electric rollers (3) contained in the front and rear sets of support components respectively, the two connecting lines are perpendicular to each other.

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