Drawer type magnetic shielding cylinder for detecting magnetism of concrete

Abstract

The utility model relates to the technical field of concrete material magnetism detection, in particular to a drawer type magnetic shielding cylinder for detecting concrete magnetism. Comprising a support which is symmetrically provided with two rails extending in the length direction of the support; the magnetic shielding cylinder is horizontally arranged on the support, a containing cavity is formed in the magnetic shielding cylinder, a closed cylinder cover is arranged at one end of the containing cavity, and a movable cylinder cover capable of moving along a track is arranged at the other end of the containing cavity; a plurality of magnetic detection devices are arranged in the accommodating cavity; the track is provided with a measuring platform for placing a sample, the measuring platform slides along the track and is used for pushing the sample into a detection area of the magnetic detection device in the accommodating cavity from the outside of the accommodating cavity, the movable barrel cover blocks the open end of the accommodating cavity, and the sample is placed in the closed magnetic shielding barrel to form an effective magnetic field barrier; magnetic field detection content can be completed by pushing a sample once on the measuring platform, convenience and rapidness are achieved, detection data are convenient to record and analyze, and compared with construction of a magnetic shielding chamber and a magnetic shielding cylinder, cost is low, and arrangement is flexible.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete material magnetism detection, in particular to a drawer-type magnetic shielding cylinder for detecting concrete magnetism. Background Art

[0002] In order to meet the low magnetic environment requirements of engineering projects, magnetic detection technology is needed to select qualified concrete materials. The residual magnetic field strength of concrete materials is extremely weak, and the residual magnetism of the material needs to be controlled within (5-10)×10 -9 T, while the background magnetic field has a magnetic field strength of 50×10 -6 nT, the electromagnetic interference of the superimposed production environment has a great impact on the measurement process, and the distance between the magnetic sensor and the material being measured is relatively sensitive. The magnetic field strength decays exponentially with the increase of distance. It is required that the distance between the magnetic sensor and the material being measured should not be too far, and the test should be carried out at the same standard distance;

[0003] The traditional point-by-point detection method is not only inefficient, but also time-consuming and labor-intensive. Frequent manual operations also lead to large measurement errors. The utility model designs a drawer-type magnetic shielding tube detection device to solve the problems of shielding interference magnetic fields and low efficiency of point-by-point detection during the residual magnetism of concrete materials, saving a lot of labor costs, improving detection efficiency, and enhancing detection accuracy and stability. Utility Model Content

[0004] In view of the deficiencies existing in the above-mentioned prior art, the utility model provides a drawer-type magnetic shielding cylinder for detecting the magnetism of concrete, which can shield the interfering magnetic field, save labor costs and has high detection efficiency.

[0005] The utility model provides a drawer-type magnetic shielding cylinder for detecting the magnetism of concrete, comprising:

[0006] A bracket, used for supporting the magnetic shielding cylinder, wherein two parallel rails extending along the length direction of the bracket are symmetrically arranged on the bracket;

[0007] A magnetic shielding cylinder is horizontally arranged on the bracket, wherein a receiving cavity is formed in the magnetic shielding cylinder, one end of the receiving cavity is provided with a closed cylinder cover, and the other end is an open end, wherein the open end is provided with a movable cylinder cover that can move along the track;

[0008] A plurality of magnetic detection devices are arranged in the accommodating cavity;

[0009] in,

[0010] The two tracks enter the accommodating chamber from one end of the closed cylinder cover, pass through the interior of the accommodating chamber, and then pass out from the movable cylinder cover. A measuring platform for placing samples is provided on the tracks. The measuring platform slides along the tracks to push the samples from the outside of the accommodating chamber into the detection area of ​​the magnetic detection device inside the accommodating chamber for detection.

[0011] The sample enters the detection area of ​​the accommodating chamber, the movable cylinder cover blocks the open end of the accommodating chamber, and the sample is placed in the closed magnetic shielding cylinder to form an effective magnetic field barrier.

[0012] In this technical solution, the measuring platform can slide in and out of the magnetic shielding tube along the track. The measuring platform can complete the magnetic field detection content by pushing the sample once. It is convenient and fast, and it is easy to record and analyze the detection data. Compared with building a magnetic shielding room, the magnetic shielding tube has low cost and flexible placement.

[0013] In some embodiments of the present application, the measuring platform includes a horizontally arranged measuring platform body, and a plurality of support rods arranged at both ends of the measuring platform body and distributed close to the two tracks, the support rods extending vertically upward, and a pulley assembly is arranged on the support rods, and the measuring platform moves along the track through the pulley assembly.

[0014] In some embodiments of the present application, the pulley assembly includes a connecting rod horizontally passing through the top end of the support rod, and a first pulley group fixed at both ends of the connecting rod, the connecting rod spans the two tracks, the first pulley group is located on the track and can move along the track, and the movement of the first pulley group drives the measuring platform to move along the track.

[0015] In some embodiments of the present application, the measuring platform and the movable barrel cover are an integral structure, and a connecting portion extends horizontally along the upper direction of the support rod near the movable barrel cover, and the connecting portion is fixed to the inner side of the movable barrel cover near the magnetic shielding barrel, and the movement of the movable barrel cover drives the measuring platform to move; the movable barrel cover is combined with the measuring platform, so that the operator can complete the operations of sample delivery, positioning, closing the barrel cover and detection with one push action, thereby simplifying the operating process, improving work efficiency and reducing human interference.

[0016] In some embodiments of the present application, a handle is provided on the outside of the movable cylinder cover, and a second pulley group is provided on both sides of the handle. The first pulley group and the second pulley group on both sides of the movable cylinder cover are symmetrically arranged to improve the stability of the movable cylinder cover. By pulling the handle, the movable cylinder cover drives the measuring platform to move along the track.

[0017] In some embodiments of the present application, mounting holes are provided on the closed cylinder cover and the movable cylinder cover, and the mounting holes are consistent with the shape and size of the tracks, so that the two tracks pass through the closed cylinder cover and the movable cylinder cover through the mounting holes and ensure the shielding effect of the closed cylinder cover and the movable cylinder cover.

[0018] In some embodiments of the present application, each of the magnetic detection devices is installed at an equal distance from the surface of the test sample, and can simultaneously measure the magnetic field distribution of the test sample. By pushing the sample once, multi-faceted, multi-axis, and multi-point magnetic field detection can be completed, which is convenient and fast, and easy to record and analyze the test data.

[0019] In some embodiments of the present application, the magnetic shielding tube is a cylindrical structure with a high aspect ratio, which can reduce the magnetic lines of force at the port entering the tube and improve the magnetic shielding effect.

[0020] In some embodiments of the present application, the magnetic shielding cylinder, the closed cylinder cover and the movable cylinder cover are all made of multi-layer Permalloy material, which can effectively shield the earth's magnetic field and other interfering magnetic fields.

[0021] In some embodiments of the present application, the bracket, the track, and the measuring platform are all made of non-magnetic materials.

[0022] Based on the above technical solution, the measuring platform can slide in and out of the magnetic shielding cylinder along the track. The detection process is not disturbed by any external magnetic field. The measuring platform can complete the magnetic field detection content by pushing the sample once, which optimizes the operation process and greatly improves the accuracy and efficiency of the detection. Compared with building a magnetic shielding room, the magnetic shielding cylinder has low cost and flexible placement.

[0023] The first pulley group and the second pulley group are symmetrically arranged on both sides of the movable cylinder cover, which improves the stability of the movable cylinder cover and facilitates the pushing of the movable cylinder cover;

[0024] The installation position of the magnetic detection device is equidistant from the surface of the test sample, so the magnetic field distribution of the test sample can be measured simultaneously. By pushing the sample once, multi-faceted, multi-axis, and multi-point magnetic field detection can be completed, which greatly improves the detection efficiency and reduces the measurement errors caused by frequent operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0026] Figure 1 It is a schematic structural diagram of a drawer-type magnetic shielding cylinder according to an embodiment of the utility model.

[0027] In the figure:

[0028] 10. Bracket; 11. Track; 20. Magnetic shielding tube; 21. Accommodating chamber; 211. Magnetic detection device; 22. Closed tube cover; 23. Movable tube cover; 231. Handle; 232. Second pulley block; 24. Open end; 30. Measuring platform; 31. Measuring platform body; 32. Support rod; 321. Connecting part; 40. Pulley assembly; 41. Connecting rod; 42. First pulley block. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] As attached Figure 1 The present invention shows a drawer-type magnetic shielding cylinder for detecting the magnetism of concrete, comprising:

[0034] The bracket 10 is used to support the magnetic shielding tube 20. The bracket 10 is symmetrically provided with two parallel rails 11 extending along the length direction of the bracket 10.

[0035] The magnetic shielding tube 20 is horizontally arranged on the bracket 10. A housing cavity 21 is formed in the magnetic shielding tube 20. A closed tube cover 22 is arranged at one end of the housing cavity 21, and an open end 24 is arranged at the other end. A movable tube cover 23 that can move along the track 11 is arranged at the open end. The magnetic shielding tube 20 of this embodiment is a cylindrical structure with a high aspect ratio. The specification of the aspect ratio is greater than 2.5:1, which can reduce the magnetic lines of force entering the tube at the port and improve the magnetic shielding effect. In order to reduce the weight and improve the performance, the magnetic shielding tube 20, the closed tube cover 22, and the movable tube cover 23 are all made of at least 3 layers of high magnetic permeability Permalloy material. The thickness of the Permalloy sheet is 0.5-4mm, and the preferred thickness is 0.8-2mm. The sheet is required to have no obvious defects, and demagnetization heat treatment is performed after processing and forming. There is no stress concentration, and it can shield the noise of the earth's magnetic field, interference magnetic field, etc. Compared with the construction of a magnetic shielding room, it has low cost and flexible placement.

[0036] A plurality of magnetic detection devices 211 are arranged in the accommodating cavity 21; each magnetic detection device 211 is installed at an equal distance from the surface of the detection sample, and can simultaneously measure the magnetic field distribution of the detection sample. By pushing the sample once, multi-faceted, multi-axis, and multi-point magnetic field detection contents can be completed, which is convenient and fast, and is easy to record and analyze the detection data; in this embodiment, the magnetic detection device 211 is a three-axis fluxgate sensor, which is provided with three, and can simultaneously detect the residual magnetic induction intensity of the sample in three axes, five planes, and six measuring points.

[0037] In this embodiment, the bracket 10 is a frame-type structure, and two rails 11 enter the accommodating chamber 21 from one end of the closed cylinder cover 22, pass through the interior of the accommodating chamber 21, and pass out from the movable cylinder cover 23. A measuring platform 30 for placing samples is provided on the rails 11, and the measuring platform 30 slides back and forth along the rails 11 to push the sample from the outside of the accommodating chamber 21 into the detection area of ​​the magnetic detection device 211 inside the accommodating chamber 11 for detection;

[0038] The sample enters the detection area of ​​the accommodating chamber 21, and the movable cylinder cover 23 moves along the track 11 to the open end 34 to block the accommodating chamber 31. The sample is placed in the closed magnetic shielding cylinder 20 to form an effective magnetic field barrier to detect the magnetism of the sample.

[0039] Specifically, the measuring platform 30 includes a horizontally arranged measuring platform body 31, and a plurality of support rods 32 arranged at both ends of the measuring platform body 10 and distributed near the two tracks. In the present embodiment, the measuring platform body 31 is a rectangular plate structure, and four support rods 32 extending vertically upward are arranged at the four top corners of the measuring platform body 31. The length of the measuring platform body 31 is less than the length of the magnetic shielding tube 20, so that the measuring platform body 31 can be completely enclosed inside the magnetic shielding tube 20, and its width is the spacing between the two tracks 11. The two support rods 32 located in the width direction of the measuring platform body 31 are arranged between the two tracks 11; the two support rods 32 located in the width direction of the measuring platform body 31 are provided with pulley assemblies 40. In the present embodiment, a group of pulley assemblies 40 are respectively arranged at the front and rear ends of the measuring platform body 31, and the measuring platform 30 moves along the track 11 through the two pulley assemblies 40.

[0040] Among them, the pulley assembly 40 includes a connecting rod 41 that horizontally passes through the top of two support rods 32 located in the width direction of the measuring platform body 31, and a first pulley group 42 fixed at both ends of the connecting rod 41. The connecting rod 41 spans above the two rails 11. The first pulley group 42 includes pulleys located on the two rails 11 respectively, and can move along the rails. The movement of the first pulley group 42 drives the measuring platform to move along the rails.

[0041] In order to further simplify the operation, the measuring platform 30 and the movable tube cover 23 are an integrated structure, and the movement of the measuring platform 30 can be achieved by pushing the movable tube cover 23. Specifically, a connecting portion 321 extends horizontally above the support rod 32 near the movable tube cover 23, and the connecting portion 321 is fixed to the inner side of the movable tube cover 23 near the magnetic shielding tube 20. The movement of the movable tube cover 23 also drives the movement of the measuring platform 30. In this embodiment, the movable tube cover 23 is combined with the measuring platform 30. The operator can complete the operations of sample delivery, positioning, closing the magnetic shielding tube and detection with one push action, which simplifies the operating process, improves work efficiency and reduces human interference.

[0042] In order to facilitate pulling the movable cylinder cover 23, a handle 231 is provided on the outer side of the movable cylinder cover 23. The handle 231 is a U-shaped structure with an opening toward the movable cylinder cover 23. Second pulley groups 232 are provided on both sides of the handle 231. The first pulley groups 42 and the second pulley groups 232 on both sides of the movable cylinder cover 23 are symmetrically arranged, which can improve the stability of the movable cylinder cover 23. By pulling the handle 231, the movable cylinder cover 23 drives the measuring platform 30 to move along the track 11.

[0043] In order to ensure the shielding effect of the magnetic shielding tube 20, two mounting holes (not shown in the figure) are respectively opened on the closed tube cover 22 and the movable tube cover 23. The mounting holes are consistent with the shape and size of the track 11, so that the two tracks 11 pass through the closed tube cover 22 and the movable tube cover 23 through the mounting holes.

[0044] The track 11 of the present embodiment is a non-magnetic aluminum alloy guide rail, and the bracket 10 and the measuring platform 30 are also made of non-magnetic materials, thereby avoiding the influence of the magnetism of the components on the measuring environment.

[0045] The drawer-type magnetic shielding tube of this embodiment is used to detect the residual magnetic field strength of concrete materials. The magnetic induction strength of the sample is determined by detecting the difference in magnetic field before and after the sample enters the tube through multiple high-precision three-axis fluxgate sensors arranged around the magnetic shielding tube 20. The specific detection process is as follows: first, the magnetic field strength B when there is no sample in the magnetic shielding tube 20 is detected. 0 Then, the measuring platform 30 is used to carry the sample and push it to a fixed position in the magnetic shielding tube 20. At this time, the three-axis fluxgate sensors are at the same distance from the sample surface, and the three-axis fluxgate sensors record the magnetic field intensity B at this time. 1 , the magnetic field change value ΔB before magnetization is:

[0046] ΔB=B 1 -B 0 ,

[0047] It is the residual magnetic field strength of the sample before magnetization.

[0048] Based on the above technical solution, the magnetic shielding tube 20 is a high aspect ratio structure, and the measuring platform can slide in and out of the magnetic shielding tube along the track, which can shield the noise of the geomagnetic field, interference magnetic field, etc. The detection process is not interfered by any external magnetic field. The measuring platform pushes the sample once to complete the magnetic field detection content, which optimizes the operation process and greatly improves the accuracy and efficiency of the detection. Compared with the construction of a magnetic shielding room, the magnetic shielding tube has low cost and flexible placement.

[0049] The first pulley group and the second pulley group are symmetrically arranged on both sides of the movable cylinder cover, which improves the stability of the movable cylinder cover and facilitates the pushing of the movable cylinder cover;

[0050] The installation position of the magnetic detection device is equidistant from the surface of the test sample, so the magnetic field distribution of the test sample can be measured simultaneously. By pushing the sample once, multi-faceted, multi-axis, and multi-point magnetic field detection can be completed, which greatly improves the detection efficiency and reduces the measurement errors caused by frequent operations.

[0051] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0052] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. A drawer-type magnetic shielding cylinder for detecting the magnetism of concrete, characterized in that: include: A bracket, used for supporting the magnetic shielding cylinder, wherein the bracket is symmetrically provided with two parallel rails extending along the length direction of the bracket; A magnetic shielding cylinder is horizontally arranged on the bracket, wherein a receiving cavity is formed in the magnetic shielding cylinder, one end of the receiving cavity is provided with a closed cylinder cover, and the other end is an open end, wherein the open end is provided with a movable cylinder cover that can move along the track; A plurality of magnetic detection devices are arranged in the accommodating cavity; in, The two tracks enter the accommodating chamber from one end of the closed cylinder cover, pass through the interior of the accommodating chamber, and then pass out from the movable cylinder cover. A measuring platform for placing samples is provided on the tracks. The measuring platform slides along the tracks to push the samples from the outside of the accommodating chamber into the detection area of ​​the magnetic detection device inside the accommodating chamber for detection. The sample enters the detection area of ​​the accommodating cavity, the movable cylinder cover blocks the open end of the accommodating cavity, and the sample is placed in the closed magnetic shielding cylinder to form an effective magnetic field barrier.

2. The drawer-type magnetic shielding cylinder for detecting the magnetism of concrete according to claim 1 is characterized in that: The measuring platform includes a horizontally arranged measuring platform body, and a plurality of support rods arranged at both ends of the measuring platform body and distributed close to the two tracks. The support rods extend vertically upward, and a pulley assembly is arranged on the support rods. The measuring platform moves along the tracks through the pulley assembly.

3. The drawer-type magnetic shielding cylinder for detecting the magnetism of concrete according to claim 2 is characterized in that: The pulley assembly includes a connecting rod horizontally passing through the top end of the support rod, and a first pulley group fixed at both ends of the connecting rod, the connecting rod spans the two tracks, the first pulley group is located on the track and can move along the track, and the movement of the first pulley group drives the measuring platform to move along the track.

4. The drawer-type magnetic shielding cylinder for detecting the magnetism of concrete according to claim 2 is characterized in that: The measuring platform and the movable tube cover are an integrated structure. A connecting portion extends horizontally from the upper direction of the support rod close to the movable tube cover. The connecting portion is fixed to the inner side of the movable tube cover close to the magnetic shielding tube. The movement of the movable tube cover drives the measuring platform to move.

5. The drawer-type magnetic shielding cylinder for detecting the magnetism of concrete according to claim 3 is characterized in that: A handle is arranged on the outer side of the movable cylinder cover, and second pulley groups are arranged on both sides of the handle. The first pulley group and the second pulley group on both sides of the movable cylinder cover are symmetrically arranged.

6. The drawer-type magnetic shielding cylinder for detecting the magnetism of concrete according to claim 1 is characterized in that: The closed cylinder cover and the movable cylinder cover are provided with mounting holes, and the mounting holes are consistent with the shape and size of the tracks, so that the two tracks pass through the closed cylinder cover and the movable cylinder cover through the mounting holes.

7. The drawer-type magnetic shielding cylinder for detecting the magnetism of concrete according to claim 1 is characterized in that: Each of the magnetic detection devices is installed at an equal distance from the surface of the detection sample, and the magnetic field distribution of the detection sample can be measured simultaneously.

8. The drawer-type magnetic shielding cylinder for detecting the magnetism of concrete according to claim 1 is characterized in that: The magnetic shielding tube is a cylindrical structure with a high aspect ratio.

9. The drawer-type magnetic shielding cylinder for detecting the magnetism of concrete according to claim 1 is characterized in that: The magnetic shielding cylinder, the closed cylinder cover and the movable cylinder cover are all made of multi-layer Permalloy material to shield the earth's magnetic field and interference magnetic field.

10. The drawer-type magnetic shielding cylinder for detecting magnetism of concrete according to claim 1, characterized in that: The bracket, the track and the measuring platform are all made of non-magnetic materials.

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