CN204188790U - For measuring the support of magnets magnetic fields distribution - Google Patents

Abstract

The utility model discloses a bracket for measuring the magnetic field distribution of a magnet, which comprises a bottom plate, a circular hole is formed on the bottom plate, and a circular turntable is rotatably arranged concentrically with the circular hole on the bottom plate , a radial guide rail is provided on the turntable, and an axial guide rail is provided in the guide groove of the radial guide rail, and the axial guide rail can be guided by the radial guide rail under the action of the radial adjustment mechanism. Moving back and forth in the slot, an axial measuring rod is movably arranged in the axial guide rail, the axial measuring rod is set through the turntable, and a probe fixing mechanism is arranged at the end of the axial measuring rod. The bracket used to measure the magnetic field distribution of the utility model can realize the rapid movement of the probe on the circumference through the setting of the turntable, so that the magnetic field strength on any circumferential line can be measured conveniently and quickly, and the center of the magnetic field can be found conveniently. s position.

Description

Holder for measuring the magnetic field distribution of magnets

technical field

The utility model relates to the technical field of magnetic field detection, in particular to a support for measuring the magnetic field distribution of a magnet.

Background technique

In the RF wave heating system, it is necessary to use a magnetic field to confine the electron beam in the klystron, so that the electron beam passes through the anode and cavity of the klystron, and finally reaches the collector of the klystron, thereby realizing high-power microwave output. As shown in FIG. 1 , the magnet 100 used to generate the magnetic field in the RF wave heating system is generally circular, with a cylindrical magnetic field space in the middle. In order to obtain a strong enough magnetic field, a high voltage of tens of thousands of volts must be fed to the magnet coil in the radio frequency heating system. Under the current technical conditions, such a high voltage input to the magnet coil can only last for tens of seconds. time, which brings difficulty to the magnetic field measurement. The probe in the magnetic field measurement equipment needs to be able to move quickly in the magnetic field so that it can quickly measure the field strength at any point in the three-dimensional space, and then determine the center of the magnetic field. The current magnetic field measurement device The rapid movement of the probe cannot be realized, and the position of the center of the magnetic field cannot be quickly determined.

Utility model content

The technical problem solved by the utility model is that in the prior art, the probe cannot be moved quickly, so that the magnetic field distribution of the magnet cannot be quickly measured to determine the center position of the magnetic field, and a method that can realize the rapid movement of the probe on the circumference line and quickly determine the magnetic field Holder in the center for measuring the magnetic field distribution of the magnet.

In order to solve the problems of the technologies described above, the technical scheme adopted by the utility model is as follows:

The bracket for measuring the magnetic field distribution of the magnet includes a bottom plate, a circular hole is formed on the bottom plate, and a circular turntable is rotatably arranged on the bottom plate concentric with the hole, and a circular turntable is arranged on the turntable. There are radial guide rails, and axial guide rails are arranged in the guide grooves of the radial guide rails, and the axial guide rails can move back and forth in the guide grooves of the radial guide rails under the action of the radial adjustment mechanism. An axial measuring rod is movably arranged in the axial guide rail, the axial measuring rod is arranged through the turntable, and a probe fixing mechanism is arranged at the end of the axial measuring rod.

Preferably, the bracket further includes a cover plate, the cover plate is ring-shaped, and its outer diameter is larger than the diameter of the circular hole, and its inner diameter is smaller than the diameter of the circular hole, the cover plate and the circle The holes are arranged concentrically and fixed on the bottom plate, so that a circumferential guide groove is formed between the cover plate and the bottom plate, and the turntable is embedded in the circumferential guide groove and can move along the circumferential guide groove Rotate around the axis.

Preferably, a rotating wheel is provided on the axial guide rail, the axial measuring rod is set as a rack measuring rod, and the rotating wheel drives the rack measuring rod to move up and down through a gear.

Preferably, a positioning and locking mechanism is also provided on the bottom plate, and the positioning and locking mechanism includes an axial leveling mechanism and a radial positioning and locking mechanism.

Preferably, the axial leveling mechanism is set as a leveling screw, and the leveling screw is screwed on the bottom plate.

Preferably, the radial positioning and locking mechanism includes at least two radial support rods, the inner end of each radial support rod is fixedly connected to the bottom plate, and the outer end is threadedly connected with a radial adjustment screw, so The inner end of the radial adjustment screw rod is connected with a fixed block, and a radial locking screw is arranged between the fixed block and the radial support rod, and a screw for the radial support rod is provided on the radial support rod. Opening for back and forth movement of radial locking screws.

Preferably, a circumferential locking screw capable of locking the turntable is provided between the turntable and the cover plate, and a locking screw capable of locking the turntable is provided between the axial guide rail and the axial measuring rod. The locking screw of the axial measuring rod, the cover plate and the bottom plate are screwed together.

Preferably, the probe fixing mechanism includes two fixedly connected semicircular blocks.

Preferably, the radial adjustment mechanism is arranged on the radial guide rail, and there are scales on the turntable, the axial measuring rod and/or the radial guide rail.

Preferably, the bottom plate is ring-shaped.

The beneficial effects of the utility model are as follows:

The bracket used to measure the magnetic field distribution of the utility model can realize the rapid movement of the probe on the circumference through the setting of the turntable, so that the magnetic field strength on any circumferential line can be measured conveniently and quickly, and the center of the magnetic field can be found conveniently. s position.

Description of drawings

Fig. 1 is the structural representation of common magnet in the prior art;

Fig. 2 is the structural representation of the bracket for measuring the magnetic field distribution of the utility model;

Fig. 3 is an enlarged view of a partial structure for realizing axial adjustment;

Fig. 4 is a schematic cross-sectional view of a partial structure for realizing circumferential rotation;

Fig. 5 is the schematic structural view of the fixed structure part of the probe in the utility model;

Fig. 6 is the use state diagram of the bracket for measuring the magnetic field distribution of the magnet of the present invention;

In the picture:

1 base plate, 2 turntable, 3 radial guide rail, 4 axial guide rail, 41 rotating wheel, 5 radial adjustment mechanism, 6 axial measuring rod, 7 probe fixing mechanism, 8 cover plate, 9 leveling screw, 10 radial Support rod, 11 radial adjustment screw, 12 fixed block, 13 radial locking screw, 14 circumferential locking screw, 15 locking screw, 100 magnet, 200 bracket.

Detailed ways

The technical solutions and beneficial effects of the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Referring to accompanying drawing 2 to accompanying drawing 6, the bracket that is used to measure the magnetic field distribution of magnet of the present utility model, comprises base plate 1, is formed with round hole on base plate 1, and is concentric with circular hole on base plate 1 and is rotatably provided with to form a circle. Shaped turntable 2, a radial guide rail 3 is arranged on the turntable 2, and an axial guide rail 4 is arranged in the guide groove of the radial guide rail 3. 3 moves back and forth in the guide groove, the axial guide rail 4 is movably provided with an axial measuring rod 6, the axial measuring rod 6 is set through the turntable 2, and the end of the axial measuring rod 6 is provided with a probe fixing mechanism 7.

In order to make the position of the turntable 2 relatively fixed without restricting its rotation, the rotation guide groove of the turntable 2 can be provided. Specifically, as shown in the figure, a cover plate 8 is provided. The cover plate 8 is ring-shaped, and its outer diameter is larger than that of the circular hole. The diameter and the diameter of the inner circle are smaller than the diameter of the round hole. The cover plate 8 and the round hole are concentrically arranged and fixed on the bottom plate 1, so that a circumferential guide groove is formed between the cover plate 8 and the bottom plate 1, and the turntable 2 is embedded in the circumferential guide groove. and can rotate axially along the circumferential guide groove. Of course, other methods can also be used, for example, a groove that can be embedded in the turntable 2 can be directly provided on the bottom plate 1, etc., as long as the support and rotation of the turntable 2 can be realized.

In order to move up and down of the axis guide rail 4 conveniently, a rotating wheel 41 can be arranged on the axial guide rail 4, and the axial measuring rod 6 is set as a rack measuring rod, and the rotating wheel 41 drives the rack measuring rod to move up and down through a gear.

In order to ensure that the bracket of the present invention can be applied to the test process conveniently and smoothly, a positioning locking mechanism can be set on the bottom plate 1, and the positioning locking mechanism includes an axial leveling mechanism and a radial positioning locking mechanism, specifically:

The above-mentioned axial leveling mechanism is used to ensure that the support of the present utility model can be in a horizontal state when in use. Specifically, the leveling mechanism can be a leveling screw rod 9. As shown in the figure, the number of leveling bolts 9 can be 3 root, the leveling screw rod 9 is threadedly connected to the bottom plate 1;

The center of the magnetic field of the magnet is approximately near its geometric center, so the measurement can be started with the probe approximately at the geometric center of the magnet. The function of the above-mentioned radial positioning locking mechanism is to adjust the probe to the geometric center of the magnet and fix it by clamping when the bracket of the present invention is in use, so as to prevent the bracket from shifting during use and interfere with the measurement process. The radial positioning locking mechanism may include at least two radial support rods 10, for example, four in the figure, the inner end of each radial support rod 10 is fixedly connected to the bottom plate 1, and the outer end is threadedly connected with a diameter To the adjustment screw 11, the inner end of the radial adjustment screw 11 is connected with a fixed block 12, and a radial locking screw 13 is arranged between the fixed block 12 and the radial support rod 10, and a radial locking screw 13 is arranged on the radial support rod 10. There are holes for the radial locking screws 13 to move back and forth.

In the utility model, a circumferential locking screw 14 capable of locking the turntable 2 can be arranged between the turntable 2 and the cover plate 8, and a lock capable of locking the axial measurement rod 6 can be arranged between the axial guide rail 4 and the axial measurement rod 6. Tighten the screw 15, so that the relevant moving parts can be locked during measurement to prevent their displacement and ensure the accuracy of measurement.

In order to facilitate disassembly, the cover plate 8 and the base plate 1 can be screwed together.

Referring to accompanying drawing 5, the probe fixing mechanism 7 in the utility model can comprise two fixedly connected semicircular clamping blocks, and the probe is fixed between the two semicircular clamping blocks during use, and the two semicircular clamping blocks The clamping block can be fixed by bolts to facilitate the replacement of the probe. Of course, the probe fixing mechanism can also adopt other forms, such as a buckle type, etc., as long as the probe can be fixed.

Arranging the radial adjustment mechanism 5 on the radial guide rail 3 can make the bracket structure of the present invention more compact and easy to operate. Of course, the radial adjustment mechanism 5 can also be arranged on the turntable 2 .

As shown in the figure, the base plate 1 in the present utility model can be annular, and certainly, the shape of the outer edge contour of the base plate 1 can also be any other suitable form, such as ellipse, etc., as long as it can play a supporting role, it is not necessary It can affect other parts of the work.

In order to find the exact position conveniently, scales can be provided on the turntable 2, the axial measuring rod 6, and the radial guide rail 3.

Referring to accompanying drawing 6, the using method and working process of the bracket for measuring the magnetic field distribution of the magnet of the present utility model are as follows:

Three leveling screw rods 9 on the bottom plate 1 of the bracket 200 used to measure the magnetic field distribution of the magnet of the present invention are supported on the upper surface of the magnet 100, and the length of the leveling screw rods 9 can be adjusted to adjust the level of the bracket 200;

Adjust the radial adjustment screw 11 to push the fixed block 12 to move along the radial support rod 10, and when the outer surface of the magnet 100 is stuck, lock it with the radial locking screw 13;

Adjust the radial adjustment mechanism 5 to push the axial guide rail 4 and the axial measuring rod 6 to move to a predetermined position along the radial guide rail 3, turn the rotating wheel 41, and the rotating wheel 41 drives the axial measuring rod 6 in the axial guide rail 4 through the gear Move up and down, and after adjusting to the exact position, the locking screw 15 is locked;

Put the probe between the two semicircular blocks of the probe fixing mechanism 7, fix the two semicircular blocks with screws to clamp the probe, and install a semicircular block bolt on the axial measuring rod 6 ;

When measuring, you can quickly rotate the turntable 2 to complete the field strength test of each point on a circle in a short period of time, find the point with the highest field strength on the circle, and then perform the field strength test of each point on the next circle. Find the point with the maximum field strength. The point with the maximum field strength on each circumference is the center of the magnetic field. It is easier to find the center of the magnetic field quickly by using this test method on the bracket of the present invention. The turntable 2 can also be locked with the circumferential locking screw 14 at the corresponding position, so as to measure the magnetic field strength along the axis or in the radial direction.

Claims (10)

1. The support for measuring the magnetic field distribution of a magnet is characterized in that: it comprises a base plate (1), and a circular hole is formed on the base plate (1), which is concentric and rotatable with the circular hole on the base plate (1) A circular turntable (2) is arranged on the ground, a radial guide rail (3) is arranged on the turntable (2), and an axial guide rail (4) is arranged in the guide groove of the radial guide rail (3) , the axial guide rail (4) can move back and forth in the guide groove of the radial guide rail (3) under the action of the radial adjustment mechanism (5), and the axial guide rail (4) is movably set There is an axial measuring rod (6), which is arranged through the turntable (2), and the end of the axial measuring rod (6) is provided with a probe fixing mechanism (7). 2. the support that is used to measure the magnetic field distribution of magnet as claimed in claim 1, is characterized in that: described support also comprises cover plate (8), and described cover plate (8) is ring-shaped, and its outer circle diameter is larger than described The diameter of the circular hole and the diameter of the inner circle are smaller than the diameter of the circular hole, and the cover plate (8) and the circular hole are concentrically arranged and fixed on the base plate (1), so that the cover plate (8) A circumferential guide groove is formed between the bottom plate (1), and the turntable (2) is embedded in the circumferential guide groove and can rotate axially along the circumferential guide groove. 3. The support for measuring the magnetic field distribution of a magnet as claimed in claim 2, characterized in that: a rotating wheel (41) is arranged on the axial guide rail (4), and the axial measuring rod (6) is set to The rack measuring rod, the rotating wheel (41) drives the rack measuring rod to move up and down through a gear. 4. The support for measuring the magnetic field distribution of a magnet as claimed in claim 3, characterized in that: a positioning locking mechanism is also provided on the base plate (1), and the positioning locking mechanism includes an axial leveling mechanism and Radial positioning locking mechanism. 5. The support for measuring the magnetic field distribution of a magnet as claimed in claim 4, characterized in that: the axial leveling mechanism is set as a leveling screw (9), and the leveling screw (9) is threaded on the on the bottom plate (1). 6. The support for measuring the magnetic field distribution of a magnet as claimed in claim 5, characterized in that: said radial positioning locking mechanism comprises at least two radial support rods (10), each of said radial support rods ( The inner end of 10) is fixedly connected with the bottom plate (1), the outer end is threadedly connected with a radial adjustment screw (11), and the inner end of the radial adjustment screw (11) is connected with a fixed block (12), A radial locking screw (13) is provided between the fixed block (12) and the radial support rod (10), and a radial locking screw (13) is provided on the radial support rod (10) for the radial The opening for the locking screw (13) to move back and forth. 7. The support for measuring the magnetic field distribution of a magnet as claimed in claim 6, characterized in that: between the turntable (2) and the cover plate (8) is provided with a lock that can lock the turntable (2) Circumferential locking screw (14), a locking screw (15) capable of locking the axial measuring rod (6) is arranged between the axial guide rail (4) and the axial measuring rod (6) , the cover plate (8) is screwed to the bottom plate (1). 8. The bracket for measuring the magnetic field distribution of a magnet according to claim 7, characterized in that: the probe fixing mechanism (7) comprises two fixedly connected semicircular blocks. 9. The support for measuring the magnetic field distribution of a magnet as claimed in claim 8, characterized in that: the radial adjustment mechanism (5) is arranged on the radial guide rail (3), and the turntable (2), the There are scales on the axial measuring rod (6) and/or the radial guide rail (3). 10. The bracket for measuring the magnetic field distribution of a magnet according to any one of claims 1 to 9, characterized in that: the bottom plate (1) is ring-shaped.