CN217717611U - A far-field eddy current probe protection device - Google Patents

Abstract

The utility model discloses a far-field eddy current probe protection device, which relates to the technical field of testing equipment, comprising a center rod and a support device, wherein the support device is arranged on the center rod, and the center rod can be fixedly arranged at the rear end of the far-field eddy current probe, and The outer edge of the support device can fit the inner wall of the heat exchange tube, so that the outer wall of the rear end of the far-field eddy current probe and the inner wall of the heat exchange tube maintain a distance. By setting a support device, the outer wall of the rear end of the far-field eddy current probe is kept at a distance from the inner wall of the heat exchange tube, so as to prevent contact wear and tear and ensure the accuracy of the detection data.

Description

A far-field eddy current probe protection device

technical field

The utility model relates to the technical field of detection equipment, in particular to a far-field eddy current probe protection device.

Background technique

During regular inspection or emergency shutdown of heat exchangers in petrochemical plants, far-field eddy current testing of ferromagnetic heat exchange tubes is required to determine the degree of corrosion and leakage of the heat exchange tubes. At present, when the far-field eddy current detection uses the inner-penetrating far-field eddy current detection probe to detect the ferromagnetic heat exchange tube, when the far-field eddy current probe enters and exits the heat exchange tube, the front end of the probe is connected to the data connection line. There is a certain deflection in the long and data connection line, the wear of the front end will be relatively light, while the back end will directly contact with the inner wall of the heat exchange tube and wear. After long-term use, the rear end of the probe will wear and deflect, resulting in damage to the probe; There is a certain gap between the field eddy current probe and the inner wall of the heat exchange tube, and the two ends of the eddy current probe contact the inner wall of the heat exchange tube, resulting in inconsistent filling rates of various parts of the probe (filling rate refers to the ratio of the outer diameter of the probe to the inner diameter of the heat exchange tube, the detection The requirement is generally not less than 70%, and the greater the filling rate, the higher the reliability of the general data), which leads to certain deviations in the detection data and affects the results of eddy current testing.

Utility model content

The purpose of this utility model is to provide a far-field eddy current probe protection device to solve the above-mentioned problems in the prior art, avoid the wear of the rear end of the far-field eddy current probe, and ensure the accuracy of detection data.

In order to achieve the above object, the utility model provides the following scheme:

The utility model provides a protection device for a far-field eddy current probe, which includes a central rod and a support device, the support device is arranged on the central rod, the central rod can be fixedly arranged at the rear end of the far-field eddy current probe, and the The outer edge of the support device can fit the inner wall of the heat exchange tube so that the outer wall of the rear end of the far-field eddy current probe maintains a distance from the inner wall of the heat exchange tube.

Preferably, it also includes a fixed seat and a moving block, one end of the central rod is fixedly arranged on the fixed seat, the fixed seat can be fixedly arranged on the rear end of the far-field eddy current probe, and one end of the support device is arranged on the and the other end of the supporting device is set on the moving block, the moving block is sleeved on the central rod, and the moving block can move on the central rod to realize the movement The block approaches or moves away from the fixing seat and changes the outer diameter of the outer edge of the supporting device.

Preferably, a locking device is further included, the locking device is arranged on the central rod, and the locking device can lock the relative position of the moving block on the central rod.

Preferably, the support device includes at least two support rod assemblies, each of which is arranged around the axis of the central rod, the support rod assembly includes a first rod body and a second rod body, and one end of the first rod body It is rotatably connected with one end of the second rod body, and one end of each first rod body away from the second rod body is rotatably connected with the fixing base, and each of the second rod bodies is connected with one end far away from the first rod body. It is rotatably connected with the moving block, and the movement of the moving block on the central rod can drive the angle change between the first rod body and the second rod body connected to it and make the first rod body away from the The distance between one end of the fixing seat and the central rod varies.

Preferably, a rolling device is provided at the joint between each of the first rods and one of the second rods, and the side of each of the rolling devices away from the central rod together forms the outer edge of the supporting device, and each The rolling device can roll along the inner wall of the heat exchange tube.

Preferably, the rolling device is a ball bearing.

Preferably, each of the first rod bodies and each of the second rod bodies are made of aluminum alloy.

Preferably, the locking device includes a first nut and a second nut, the central rod is a threaded rod, and both the first nut and the second nut are threadedly connected to the central rod, and the moving block A through hole is opened on the top, the center rod is sleeved in the through hole, and the moving block can move along the axis of the center rod, the first nut, the moving block and the second nut are sequentially set on the center pole.

Compared with the prior art, the utility model has achieved the following technical effects:

The far-field eddy current probe protection device provided by the utility model maintains a distance between the rear end of the far-field eddy current probe and the inner wall of the heat exchange tube by setting a support device to prevent wear and tear and ensure the accuracy of detection data.

Further, the moving block is used to drive one end of the support device to move and change the size of its outer edge, which can be applied to heat exchange tubes with different inner diameters, increasing its applicable range.

Further, the locking device can lock the relative position of the moving block, that is, it can keep the outer edge of the support device at a certain size, which can keep the distance between the rear end of the far-field eddy current probe and the inner wall of the heat exchange tube stable, and prevent them from contacting wear and tear.

Further, the support device is composed of more than two support rod assemblies, and each support rod assembly is composed of two rods, which has a simple structure and is convenient to manufacture.

Furthermore, the rolling device provided on each support rod assembly can improve the smoothness of inserting and removing the far-field eddy current probe on the heat exchange tube, thereby improving work efficiency.

Further, the rolling device adopts a ball bearing, and its components are common and easy to obtain.

Further, the first rod body and the second rod body are made of aluminum alloy, which is corrosion-resistant and has a long service life.

Further, the locking device adopts the form of two nuts threadedly connected with the central rod to clamp and lock the position of the moving block, the structure is simple, and the locking is stable and reliable.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the present invention. For some embodiments of the present invention, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic diagram of the overall structure of the far-field eddy current probe protection device provided by the present invention.

In the figure: 100-far-field eddy current probe protection device; 1-center rod; 2-support device; 3-fixed seat; 4-moving block; 5-locking device; 51-first nut; 52-second nut; 6-support rod assembly; 61-first rod body; 62-second rod body; 63-rolling device; 7-far-field eddy current probe; 8-heat exchange tube.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The purpose of the utility model is to provide a far-field eddy current probe protection device to solve the problems existing in the prior art, avoid the wear of the rear end of the far-field eddy current probe, and ensure the accuracy of detection data.

In order to make the above purpose, features and advantages of the utility model more obvious and understandable, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Embodiment one

This embodiment provides a far-field eddy current probe protection device 100, as shown in Figure 1, including a central rod 1 and a support device 2, the support device 2 is arranged on the central rod 1, and the central rod 1 can be fixedly arranged on the far-field eddy current probe 7, and the outer edge of the support device 2 can be attached to the inner wall of the heat exchange tube 8 to keep the distance between the outer wall of the rear end of the far-field eddy current probe 7 and the inner wall of the heat exchange tube 8 . By setting the supporting device 2, the distance between the outer wall of the rear end of the far-field eddy current probe 7 and the inner wall of the heat exchange tube 8 is kept, so as to prevent the contact wear between the outer wall of the rear end of the far-field eddy current probe 7 and the inner wall of the heat exchange tube 8, and ensure the accuracy of the detection data.

In the optional solution of this embodiment, preferably, as shown in Figure 1, the far-field eddy current probe protection device 100 also includes a fixed seat 3 and a moving block 4, and one end of the central rod 1 is fixedly arranged on the fixed seat 3, specifically , the axes of the central rod 1 and the fixed seat 3 coincide, the fixed seat 3 can be fixedly arranged on the rear end of the far-field eddy current probe 7, one end of the support device 2 is arranged on the fixed seat 3, and the other end of the support device 2 is arranged on the moving block 4, the moving block 4 is sleeved on the central rod 1, and the moving block 4 can move on the central rod 1 to realize the moving block 4 approaching or moving away from the fixed seat 3 and changing the outer diameter of the outer edge of the supporting device 2. The moving block 4 is used to drive one end of the support device 2 to move and change the size of its outer edge, which can be applied to heat exchange tubes 8 with different inner diameters, increasing its applicable range.

Specifically, the support radius formed by the outer edge of the support device 2 is suitable for a heat exchange tube 8 with a diameter of 60 mm at most.

In the optional solution of this embodiment, preferably, as shown in Figure 1, the far-field eddy current probe protection device 100 also includes a locking device 5, which is arranged on the center rod 1, and the locking device 5 can Lock the relative position of the moving block 4 on the center pole 1. The locking device 5 can lock the relative position of the moving block 4, that is, it can keep the outer edge of the support device 2 in a certain size, which can keep the distance between the rear end of the far-field eddy current probe 7 and the inner wall of the heat exchange tube 8 stable, preventing The rear end of the far-field eddy current probe 7 contacts and wears with the inner wall of the heat exchange tube 8 .

In the optional solution of this embodiment, preferably, as shown in FIG. 1, the support device 2 includes at least two support rod assemblies 6, each support rod assembly 6 is arranged around the axis of the central rod 1, and the support rod assemblies 6 include a first Rod body 61 and the second rod body 62, one end of the first rod body 61 is rotationally connected with an end of the second rod body 62, and each first rod body 61 is rotatably connected with the fixing seat 3 at an end away from the second rod body 62, and each second rod body 62 One end far away from the first rod body 61 is rotatably connected with the moving block 4. Specifically, the rotation axis of the first rod body 61 and the second rod body 62 is the first axis, and the rotation axis of the first rod body 61 and the fixed seat 3 is the second axis. , the rotation axis of the second rod body 62 and the moving block 4 is the third axis, the first axis, the second axis and the third axis are respectively parallel and perpendicular to the axis of the central rod 1, and the moving block 4 is on the central rod 1 The movement can change the angle between the first rod body 61 and the second rod body 62 connected thereto and change the distance between the end of the first rod body 61 away from the fixing base 3 and the central rod 1 . The support device 2 is composed of more than two support rod assemblies 6, and each support rod assembly 6 is composed of two rods, which has a simple structure and is convenient to manufacture.

Specifically, the length of the first rod body 61 is 60 mm, and the length of the second rod body 62 is 30 mm.

In another optional solution of this embodiment, the support device 2 can also be a cylindrical rubber sleeve, and the middle outer diameter of the rubber sleeve is large, and the outer diameters at both ends are small. Stretching, the middle outer diameter of the rubber sleeve produces elastic deformation and the outer diameter becomes smaller. In this embodiment, one end of the rubber sleeve is fixedly connected with the fixed seat 3, and the other end of the rubber sleeve is fixedly connected with the moving block 4. At this time, the The movement realizes the change of the middle outer diameter of the rubber sleeve.

In the optional solution of this embodiment, more preferably, as shown in FIG. 1 , a rolling device 63 is provided at the joint between each first rod body 61 and a second rod body 62 , and each rolling device 63 is far away from the central rod 1 at one position. The sides jointly form the outer edge of the support device 2 , and each rolling device 63 can roll along the inner wall of the heat exchange tube 8 . The rolling device 63 provided on each support rod assembly 6 can improve the smoothness of inserting and removing the far-field eddy current probe 7 in the heat exchange tube 8, thereby improving work efficiency.

In the optional solution of this embodiment, preferably, the rolling device 63 is a ball bearing, specifically, a ball bearing, specifically, the axis of the ball bearing is perpendicular to the axis of the heat exchange tube 8, and the outer ring of the ball bearing can be moved along the The inner wall of the heat pipe 8 rolls, and the inner ring of the ball bearing is fixedly connected with a rotating shaft, and the rotating shaft is rotationally connected with the first rod body 61 and the second rod body 62 respectively. What the rolling device 63 adopted is a ball bearing, and its parts are common and easy to obtain.

In an alternative solution of this embodiment, preferably, each first rod body 61 and each second rod body 62 are made of aluminum alloy. The first rod body 61 and the second rod body 62 are made of aluminum alloy, which is corrosion-resistant and has a long service life.

In the optional solution of this embodiment, more preferably, as shown in Figure 1, the locking device 5 includes a first nut 51 and a second nut 52, the central rod 1 is a threaded rod, and the first nut 51 and the second nut 52 are threadedly connected with the central rod 1, the moving block 4 is provided with a through hole, the central rod 1 is sleeved in the through hole, and the moving block 4 can move along the axis of the central rod 1, the first nut 51, the moving block 4 and the second Two nuts 52 are sequentially arranged on the central rod 1 . The locking device 5 adopts the form of two nuts threadedly connected with the central rod 1 to clamp and lock the position of the moving block 4 , the structure is simple, and the locking is stable and reliable.

In the utility model, specific examples have been used to illustrate the principle and implementation of the utility model, and the descriptions of the above examples are only used to help understand the method of the utility model and its core idea; meanwhile, for those of ordinary skill in the art , according to the idea of the utility model, there will be changes in the specific implementation and application range. To sum up, the contents of this specification should not be understood as limiting the utility model.

Claims (8)

1. A far-field eddy current probe protection device is characterized in that: including well core rod and strutting arrangement, strutting arrangement sets up well core rod is last, well core rod can fix the rear end that sets up at far field vortex probe, just the heat exchange tube inner wall can be laminated to the strutting arrangement outward flange makes far field vortex probe rear end lateral wall and heat exchange tube inner wall keep the interval.

2. The far field eddy current probe protection device of claim 1, wherein: the device comprises a fixed seat and a moving block, wherein one end of a central rod is fixedly arranged on the fixed seat, the fixed seat can be fixedly arranged at the rear end of a far-field eddy current probe, one end of a supporting device is arranged on the fixed seat, the other end of the supporting device is arranged on the moving block, the moving block is sleeved on the central rod, and the moving block can move on the central rod to enable the moving block to be close to or far away from the fixed seat and change the outer diameter of the outer edge of the supporting device.

3. The far field eddy current probe protection device of claim 2, wherein: the locking device is arranged on the central rod and can lock the relative position of the moving block on the central rod.

4. The far field eddy current probe protection device of claim 2, wherein: the supporting device comprises at least two supporting rod assemblies, each supporting rod assembly is arranged around the axis of the central rod, each supporting rod assembly comprises a first rod body and a second rod body, one end of each first rod body is rotatably connected with one end of each second rod body, one end, far away from the second rod body, of each first rod body is rotatably connected with the fixing base, one end, far away from the first rod body, of each second rod body is rotatably connected with the moving block, and the moving block moves on the central rod to drive the angle change between the first rod body and the second rod body connected with the first rod body and enable the distance between one end, far away from the fixing base, of the first rod body and the central rod to be changed.

5. The far field eddy current probe protection device of claim 4, wherein: and a rolling device is arranged at the joint of each first rod body and one second rod body, one side of each rolling device, which is far away from the central rod, jointly forms the outer edge of the supporting device, and each rolling device can roll along the inner wall of the heat exchange tube.

6. The far field eddy current probe protection device of claim 5, wherein: the rolling device is a ball bearing.

7. The far field eddy current probe protection device of claim 4, wherein: each first rod body and each second rod body are made of aluminum alloy materials.

8. The far field eddy current probe protection device of claim 3, wherein: the locking device comprises a first nut and a second nut, the central rod is a threaded rod, the first nut and the second nut are both in threaded connection with the central rod, a through hole is formed in the moving block, the central rod is sleeved in the through hole, the moving block can move along the axis of the central rod, and the first nut, the moving block and the second nut are sequentially arranged on the central rod.

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