Magnetic shielding cylinder for magnetometer calibration

Abstract

The utility model belongs to the field of magnetic measurement equipment, and provides a magnetic shielding cylinder for magnetometer calibration, which comprises a cylinder body, the cylinder body comprises two double-layer cylinder shells which are butted and matched left and right, the shaft end of each double-layer cylinder shell is provided with a channel, and each double-layer cylinder shell comprises an inner-layer cylinder shell, an outer-layer cylinder shell, an inner butting port, an outer butting port and a sealing plate, a reversing insertion group used for reversing the wire direction is arranged in the barrel body, the reversing insertion group comprises a left insertion piece and a right insertion piece, the opposite ends of the left insertion piece and the right insertion piece are provided with an upper insertion opening and a lower insertion opening, and two vertical channels are formed in the positions of the upper insertion opening and the lower insertion opening after the left insertion piece and the right insertion piece are connected in an inserted mode. According to the invention, the two double-layer cylindrical shells which are butted left and right are adopted, so that the double-layer cylindrical shell can be conveniently opened and closed, only two channels of four channels which are originally required can be communicated with external equipment by using the reversing inserting group in the double-layer cylindrical shell, the magnetic intensity measurement error can be reduced, and the double-layer cylindrical shell is reasonable in design, simple in structure, relatively high in practicability and suitable for large-scale popularization.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of magnetic measurement equipment, especially relates to a magnetometer calibration is with magnetic shielding cylinder. BACKGROUND

[0002] Magnetometer is the instrument of measuring magnetic induction intensity, is made according to the principle that small magnetic needle can produce deflection or vibration under the action of magnetic field. From the electromagnetic induction law can deduce, for the closed loop of given resistance, just measure the electric charge flowing through this loop, can know the change of magnetic flux in this loop. Since the control and calculation part of magnetometer is influenced by magnetic field and will appear deviation, in order to guarantee the accuracy of detection, the detection error of magnetometer can be reduced by setting magnetic shielding cylinder.

[0003] The existing patent CN202210873989.1 discloses a double-layer vacuum superconducting magnetic shielding system and atomic magnetometer, the atomic magnetometer adopts the double-layer vacuum superconducting magnetic shielding system, including anti-electromagnetic interference coil, vacuum cavity, low-temperature container and multilayer magnetic shielding cylinder, the anti-electromagnetic interference coil is composed of x, y, z three-axis closed superconducting coil, can keep the magnetic field in the central region from the interference of external magnetic field;The vacuum cavity is composed of inner and outer two-layer structure, the inner layer structure insulates the influence of internal high temperature on the magnetic shielding structure, and the outer layer structure can reduce the volatilization of liquid nitrogen and prolong the working time;The low-temperature container is used for storing liquid nitrogen, and the superconducting coil can maintain superconducting state for at least 2 hours;The magnetic shielding cylinder is used for shielding external magnetic field. The superconducting magnetic shielding system reduces the influence of internal high temperature on the magnetic shielding structure, has strong magnetic field stability, low magnetic field noise and can provide stable zero magnetic environment. However, the channel for communicating with the outside of the device includes at least two axial channels and two radial channels, and the increase in the number of channels is not conducive to shielding;Moreover, the closure degree of the magnetic shielding cylinder is not conducive to its opening and closing action, thereby affecting the maintenance and inspection of the internal devices. UTILITY MODEL CONTENTS

[0004] The utility model discloses in view of the technical problems of the above-mentioned magnetic shielding cylinder, propose a kind of magnetometer calibration is with magnetic shielding cylinder, and it is reasonable in design, simple structure, facilitate opening and closing, reduce the number of equipment internal and external channel and it is stronger practicality.

[0005] In order to achieve the above object, the utility model adopts the technical scheme, the utility model provides a magnetometer calibration magnetic shielding cylinder, including the cylinder, the cylinder includes two left and right butt jointed double -layered cylinder shell, the axle end of double -layered cylinder shell is provided with a passageway, the double -layered cylinder shell includes inner layer cylinder shell and outer layer cylinder shell, the inner layer cylinder shell and outer layer cylinder shell are provided with the inner pair of sockets and the outer pair of sockets of interlaced distribution, the circumferential length of inner pair of sockets and outer pair of sockets is 1 / 2 circular arc, wherein the shell wall of one inner layer cylinder shell is provided with the baffle along the mouth edge length of inner pair of sockets, the inside of cylinder is provided with the reversing plug group for reversing line direction, the reversing plug group includes left plug -in and right plug -in, the opposite end of left plug -in and right plug -in is provided with upper socket and lower socket, after the plug -in of left plug -in and right plug -in forms two vertical passageways in upper socket and lower socket position, the width of left plug -in and right plug -in in vertical passageway direction is less than the diameter of inner layer cylinder shell.

[0006] As preferred, the top surface and the bottom surface of the left plug-in and the right plug-in are provided with a pair of support protrusions, the left plug-in and the inner plug-in are provided with a pair of positioning plates on the inner walls thereof, and one end of the positioning plates towards the center of the reversing plug group is in arc structure.

[0007] As preferred, the left plug-in includes two oppositely distributed support arc surfaces, the cross-sectional arc line of the support arc surface is 1 / 2 circular arc, the top end and the bottom end of the support arc surface are connected through a plane plate, and the inner diameter of the right plug-in is less than the inner diameter of the left plug-in.

[0008] As preferred, the support protrusions are triangular prisms, the length of the support protrusion on the right plug-in is less than the length of the support protrusion on the left plug-in, and the support protrusion on the right plug-in is arranged at the end away from the left plug-in.

[0009] As preferred, the end of the double-layered cylinder shell is provided with a pull handle hinged thereto.

[0010] Compared with the prior art, the utility model has the advantages and positive effects that:

[0011] 1. The magnetic shielding cylinder for magnetometer calibration has two double-layered cylinder shells in left and right butt joint, which is convenient for opening and closing, and the reversing plug group in the inside can realize the connection with external equipment through two passageways instead of four passageways, which is conducive to reducing the magnetic intensity measurement error. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the premise of not conflicting.

[0013] Figure 1 The exploded view of the magnetic shielding cylinder (without pull handle) for magnetometer calibration provided for the embodiment;

[0014] Figure 2 The front view of the magnetic shielding cylinder for magnetometer calibration provided for the embodiment;

[0015] Figure 3 For Figure 2 The cross-sectional view of the magnetic shielding cylinder for magnetometer calibration in A-A direction;

[0016] Figure 4 The axonometric view of the magnetic shielding cylinder (without pull handle) for magnetometer calibration provided for the embodiment;

[0017] Figure 5 The vertical cross-sectional view of the magnetic shielding cylinder for magnetometer calibration provided for the embodiment;

[0018] In the above drawings, 1, cylinder body; 2, double-layer cylinder shell; 21, channel; 22, inner layer cylinder shell; 23, outer layer cylinder shell; 24, inner pair of sockets; 25, outer pair of sockets; 26, sealing plate; 3, reversing plug set; 31, left plug; 32, right plug; 33, upper socket; 34, lower socket; 35, supporting protrusion; 36, positioning plate; 37, supporting arc surface; 38, flat plate; 4, pull handle. DETAILED DESCRIPTION

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the premise of not conflicting.

[0020] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the present application is not limited to the specific embodiments disclosed in the following description.

[0021] Embodiments, such as Figures 1-5The utility model provides a magnetometer calibration with magnetic shielding cylinder, including the cylinder 1, the cylinder 1 includes two left and right butt jointed double -deck cylinder shell 2, and the shaft end of double -deck cylinder shell 2 is provided with a passageway 21, and double -deck cylinder shell 2 includes inner layer cylinder shell 22 and outer layer cylinder shell 23, and the inner layer cylinder shell 22 and outer layer cylinder shell 23 are provided with the inner pair of sockets 24 and outer pair of sockets 25 of interlaced distribution, and the circumferential length of inner pair of sockets 24 and outer pair of sockets 25 is 1 / 2 circular arc, wherein the shell wall of one inner layer cylinder shell 22 is provided with the sealing plate 26 along the mouth length of inner pair of sockets 24, and the inside of cylinder 1 is provided with the reversing plug group 3 for reversing wire direction, and the reversing plug group 3 includes left plug 31 and right plug 32, and the opposite end of left plug 31 and right plug 32 is provided with upper socket 33 and lower socket 34, and after the plug connection of left plug 31 and right plug 32, two vertical passageways are formed in the position of upper socket 33 and lower socket 34, and the width of left plug 31 and right plug 32 in the vertical passageway direction is less than the diameter of inner layer cylinder shell 22.

[0022] Specifically, the utility model adopts two double -deck cylinder shell 2 of left and right butt joint, and one double -deck cylinder shell 2 nests the solid part of the outer layer cylinder shell 23 of the other party with the inner pair of sockets 24 to form a closed inner layer structure, and the sealing plate 26 is used to seal the butt joint of the two, prevent magnetic leakage, and similarly, one double -deck cylinder shell 2 nests the solid part of the outer layer cylinder shell 23 of the other party with the outer pair of sockets 25 to form a closed outer layer structure. In this way, two double -deck cylinder shell 2 can facilitate the opening and closing action of the magnetic shielding cylinder by left and right butt joint.

[0023] Further, the inside of cylinder 1 is provided with reversing plug group 3, and the left plug 31 of reversing plug group 3 and right plug 32 can form a shaped cavity by left and right butt joint, and the shaped cavity is used to place the anti - electromagnetic interference coil, vacuum cavity and cryogenic container, and simultaneously, the wire harness originally passing through the radial passageway can be led to the passageway at the end of cylinder 1 from the vertical passageway of reversing plug group 3, so that the originally required 4 passageways can be connected with external equipment by 2 passageways, and the magnetic intensity measurement error can be reduced.

[0024] In order to improve the positioning effect of reversing plug group 3 to the internal structure of magnetometer, the utility model is provided with a pair of positioning plates 36 on the inner wall of left plug 31 and inner plug, and the end of positioning plate 36 towards the center of reversing plug group 3 is arc structure. The arc structure is used to directly contact the outer wall of vacuum cavity and cryogenic container of magnetometer equipment, and internal positioning is realized.

[0025] Since the upper and lower faces of reversing plug group 3 reserve certain space for wire, the utility model is provided with a pair of support protrusions 35 on the top surface and bottom surface of left plug 31 and right plug 32, and the wire harness that can slide due to external disturbance factors can be limited by setting support protrusion 35.

[0026] In order to improve the stability of the commutation plug-in group 3 inside the barrel 1, the left plug-in 31 comprises two oppositely distributed support arc surfaces 37, the cross-sectional arc line of the support arc surface 37 is 1 / 2 circular arc, the top end and the bottom end of the support arc surface 37 are connected through the plane plate 38, and the inner diameter of the right plug-in 32 is smaller than that of the left plug-in 31. In this way, the support arc surface 37 is in supporting contact with the inner wall of the inner layer cylinder shell 22, and the upper and lower sides of the plane plate 38 reserve sufficient space for wiring.

[0027] Further, the support protrusion 35 is a triangular prism, the length of the support protrusion 35 on the right plug-in 32 is smaller than that of the support protrusion 35 on the left plug-in 31, and the support protrusion 35 on the right plug-in 32 is arranged at one end away from the left plug-in 31, so that the maximum plug-in depth of the left plug-in 31 and the right plug-in 32 can be limited, and the caliber of the vertical channel and the tension of the wiring can be controlled.

[0028] In order to facilitate the opening and closing control of the two double-layer cylinder shells 2, the utility model is provided with a pull handle 4 hinged to the end. When the barrel 1 needs to be opened and closed, the pull handle 4 is pulled to the axial level, and when the pull handle 4 is not needed, it is attached to the end of the barrel 1.

[0029] The above is only a preferred embodiment of the utility model, and is not limited in other forms, and any skilled person in the art can change or modify the above disclosed technology content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification of the above embodiments without departing from the technical scheme content of the utility model, according to the technical essence of the utility model, still belongs to the protection scope of the technical scheme of the utility model.

Claims

1. A magnetic shield cylinder for magnetometer calibration, comprising a cylinder body, characterized by, The barrel comprises two double-layer barrel shells which are connected to each other from left to right, the shaft end of the double-layer barrel shell is provided with a channel, the double-layer barrel shell comprises an inner layer barrel shell and an outer layer barrel shell, the inner layer barrel shell and the outer layer barrel shell are provided with an inner pair of sockets and an outer pair of sockets which are staggered with each other, the circumferential length of the inner pair of sockets and the outer pair of sockets is 1 / 2 of a circular arc, one of the inner layer barrel shells is provided with a sealing plate along the length of the mouth edge of the inner pair of sockets, the inside of the barrel is provided with a reversing plug group for reversing the wire direction, the reversing plug group comprises a left plug and a right plug, the opposite ends of the left plug and the right plug are provided with upper sockets and lower sockets, the left plug and the right plug form two vertical channels at the positions of the upper sockets and the lower sockets after being plugged together, the width of the left plug and the right plug in the vertical channel direction is smaller than the diameter of the inner layer barrel shell.

2. The magnetic shielded cylinder for magnetometer calibration according to claim 1, wherein, The top surface and the bottom surface of the left plug and the right plug are provided with a pair of support protrusions, the left plug and the inner plug are both provided with a pair of positioning plates on the inner walls thereof, one end of the positioning plates which is towards the center of the reversing plug group is in the form of a circular arc.

3. The magnetic shielded cylinder for magnetometer calibration according to claim 2, wherein, The left plug comprises two oppositely distributed support arc surfaces, the cross-sectional arc line of the support arc surface is 1 / 2 of a circular arc, the top end and the bottom end of the support arc surface are connected by a plane plate, the inner diameter of the right plug is smaller than the inner diameter of the left plug.

4. The magnetic shielded cylinder for magnetometer calibration according to claim 3, wherein, The support protrusions are in the form of triangular prisms, the length of the support protrusions on the right plug is smaller than the length of the support protrusions on the left plug, the support protrusions on the right plug are arranged at the end which is away from the left plug.

5. The magnetic shielded cylinder for magnetometer calibration according to claim 4, wherein, The end of the double-layer barrel shell is provided with a pull handle which is hinged thereto.

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