Testing device suitable for testing static magnetic field environment of electrical equipment

Abstract

The invention relates to the technical field of electromagnetic compatibility, and discloses a test device suitable for a static magnetic field environment test of electrical equipment. The device comprises a supporting base, a static magnetic field generator, a direct-current power supply, a test system and an objective table, the static magnetic field generator is arranged on the supporting base and comprises a solenoid coil, a coil supporting frame and a yoke, the solenoid coil is wound on the coil supporting frame, and the yoke is arranged on the outer side of the solenoid coil. The test system comprises a magnetic field test device and a temperature test device, the magnetic field test device is used for monitoring the size of a space magnetic field in real time, the temperature test device is used for monitoring the temperature change of a solenoid coil in real time, the objective table comprises an objective platform and an objective tool vehicle, and the objective platform is arranged on the objective tool vehicle. The direct-current power source is located on one side of the supporting base and used for providing direct-current excitation for the solenoid coil, the carrying platform is connected with the end face of the static magnetic field generator, and the carrying tool trolley carries electrical equipment to be tested through the carrying platform so as to move.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic compatibility, and in particular to a test device suitable for static magnetic field environment testing of electrical equipment. Background Art

[0002] The superconducting magnetic levitation transportation system has the advantages of ultra-high speed, high levitation-drag ratio, self-stability of suspension guidance, and large suspension gap, and has broad application prospects in the future.

[0003] Since the superconducting magnets in the superconducting maglev transportation system have open-domain strong magnetic field characteristics, they form a spatial strong electromagnetic field on the electrical equipment arranged around the magnets, which may affect the reliable operation of the electrical equipment. In order to simulate the real static magnetic field environment of the electrical equipment around the superconducting magnets offline, a 40mT static magnetic field test system is designed in the prior art.

[0004] However, the test area of ​​the existing uniform static magnetic field test systems is less than 350mm*350mm*1000mm, and the size of some on-board equipment of the superconducting maglev transportation system will exceed this measurement area. The existing test system cannot be used for static magnetic field environment testing of the superconducting maglev transportation system. Summary of the invention

[0005] The invention provides a test device suitable for static magnetic field environment testing of electrical equipment, which can solve the technical problems in the prior art.

[0006] The invention provides a test device suitable for static magnetic field environment testing of electrical equipment, wherein the device comprises a supporting base, a static magnetic field generator, a direct current power supply, a testing system and a stage, wherein the static magnetic field generator is arranged on the supporting base, the static magnetic field generator comprises a solenoid coil, a coil supporting frame and a yoke, the solenoid coil is wound on the coil supporting frame, the yoke is arranged on the outside of the solenoid coil, the testing system comprises a magnetic field testing device and a temperature testing device, the magnetic field testing device is used for real-time monitoring of the size of the spatial magnetic field, the temperature testing device is used for real-time monitoring of the temperature change of the solenoid coil, the stage comprises a loading platform and a loading tool vehicle, the loading platform is arranged on the loading tool vehicle, the direct current power supply is located on one side of the supporting base and is used for providing direct current excitation for the solenoid coil, the loading platform is connected to the end face of the static magnetic field generator, the loading tool vehicle carries the electrical equipment to be tested through the loading platform to move, so that the electrical equipment to be tested can be transported into or out of the static magnetic field generator, and the solenoid coil generates a spatially uniform direct current magnetic field under the magnetic field constraint of the yoke when powered on.

[0007] Preferably, the device further comprises a water cooling unit located at the other side of the support base, and the static magnetic field generator further comprises a cooling water pipe connected to the water cooling unit, and the cooling water pipe is arranged between the solenoid coil and the coil support frame.

[0008] Preferably, the cooling water pipe is a spiral copper pipe.

[0009] Preferably, the solenoid coil and the yoke are fixed by epoxy resin.

[0010] Preferably, the yoke comprises an upper yoke and a lower yoke which are spliced ​​together.

[0011] Preferably, the end gate and yoke of the static magnetic field generator are made of electrical pure iron DT4, the support base and the coil support frame are made of stainless steel, and the loading platform is made of a non-magnetic plate.

[0012] Preferably, the magnetic field testing device is a Gauss meter, and the temperature testing device is a thermometer.

[0013] Preferably, a platform guide rail is provided on the cargo carrier, and a generator guide rail is provided in the static magnetic generator. The platform guide rail and the generator guide rail are the same. When the two are docked, the cargo carrier and the static magnetic generator are smoothly docked through two guide blocks so that the cargo platform can enter and exit the static magnetic generator through the platform guide rail and the generator guide rail.

[0014] Preferably, a handrail is provided on one side of the loading platform and two holes are provided on the side close to the handrail. The platform track is fixed to the loading vehicle through angle irons. A handrail is provided on the loading vehicle and positioning elliptical holes are provided at both ends close to the handrail, which are used to cooperate with the two holes and intercepting rods provided on the loading platform to assist in positioning the loading platform on the loading vehicle.

[0015] Preferably, a detachable connection piece is provided between the support base and the cargo carrier.

[0016] Through the above technical solution, static magnetic field testing of large-scale equipment can be realized, and a 40mT static magnetic field testing environment can be provided for electrical equipment of systems such as ultra-high-speed maglev transportation and ultra-high-speed electromagnetic sleds. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A block diagram showing a composition of a test device suitable for static magnetic field environment testing of electrical equipment according to an embodiment of the present invention is shown;

[0019] Figure 2 A schematic structural diagram of a test device suitable for static magnetic field environment testing of electrical equipment according to an embodiment of the present invention is shown;

[0020] Figure 3 A schematic structural diagram of a static magnetic field generator containing yoke iron according to an embodiment of the present invention is shown;

[0021] Figure 4 A partial cross-sectional schematic diagram of a static magnetic field generator according to an embodiment of the present invention is shown;

[0022] Figure 5 shows a front view of a support base according to an embodiment of the present invention;

[0023] Figure 6 shows a side view of a support base according to an embodiment of the present invention;

[0024] Figure 7 A schematic diagram of the structure of a stage according to an embodiment of the present invention is shown;

[0025] Figure 8 A schematic diagram showing the connection between a cargo-carrying tool vehicle and a static magnetic field generator according to an embodiment of the present invention is shown;

[0026] Fig. 9 A schematic diagram showing the track arrangement of a carrier platform in a static magnetic field generator according to an embodiment of the present invention is shown;

[0027] Fig.10 A schematic diagram of the temperature rise of a solenoid coil according to an embodiment of the present invention is shown;

[0028] Fig.11 A schematic diagram of a cooling water pipe according to an embodiment of the present invention is shown;

[0029] Fig.12 A schematic diagram of parallel temperature-averaged water-cooling heat dissipation pipes of a static magnetic field generator according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the 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 the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0033] like Figure 1 and 2 As shown, an embodiment of the present invention provides a test device suitable for static magnetic field environment testing of electrical equipment, wherein the device includes a support base, a static magnetic field generator, a DC power supply, a test system and a stage, the static magnetic field generator is arranged on the support base, the static magnetic field generator includes a solenoid coil, a coil support frame and a yoke, the solenoid coil is wound on the coil support frame, the yoke is arranged on the outside of the solenoid coil, the test system includes a magnetic field test device and a temperature test device, the magnetic field test device is used to monitor the size of the spatial magnetic field in real time, the temperature test device is used to monitor the temperature change of the solenoid coil in real time, and the stage includes a loading platform and a loading tool vehicle, and the loading platform is arranged on the loading tool vehicle (such as Figure 7 As shown in the figure, a DC power supply is located on one side of the support base and is used to provide DC excitation for the solenoid coil. The loading platform is connected to the end face of the static magnetic field generator. The loading vehicle carries the electrical equipment to be tested through the loading platform to move, so that the electrical equipment to be tested can be transported to or out of the static magnetic field generator. When the solenoid coil is energized, it generates a spatially uniform DC magnetic field under the magnetic field constraint of the yoke iron.

[0034] The magnetic field testing equipment and the temperature testing equipment can be arranged on the same side as the DC power supply.

[0035] Through the above technical solution, static magnetic field testing of large-scale equipment can be realized, and a 40mT static magnetic field testing environment can be provided for electrical equipment of systems such as ultra-high-speed maglev transportation and ultra-high-speed electromagnetic sleds.

[0036] The test device for static magnetic field environment testing of electrical equipment according to the present invention can meet the following key technical indicators:

[0037] 1) Magnetic field measurement working value: 40mT;

[0038] 2) Effective measurement area: ≥1000mm*1000mm*1000mm;

[0039] 3) Magnetic field uniformity in the measurement area: ≤10%;

[0040] 4) Continuous measurement time: Tmax≮30min.

[0041] Based on the requirements of large magnetic induction intensity (400Gs), large effective magnetic field test area (1000mm×1000mm×1000mm) and high magnetic field uniformity (≤10%), the magnetic field generator adopts a solenoid coil.

[0042] like Figure 3 As shown, the present invention uses a solenoid coil containing a yoke iron as a static magnetic field generator. Under the same number of turns and current, the yoke iron can effectively increase the magnetic induction intensity in the coil. At the same time, the yoke iron can also shield the magnetic field from spreading outward, avoiding the impact on surrounding equipment when the device is working.

[0043] Among them, the wire gauge size of the solenoid coil is shown in Table 1 below.

[0044] Table 1 Coil Specifications

[0045]

[0046] According to one embodiment of the present invention, the device further includes a water cooling unit located on the other side of the support base, and the static magnetic field generator further includes a cooling water pipe connected to the water cooling unit, and the cooling water pipe is arranged between the solenoid coil and the coil support frame (solenoid coil skeleton), such as Figure 4 shown.

[0047] According to an embodiment of the present invention, the cooling water pipe is a spiral copper pipe.

[0048] According to an embodiment of the present invention, the solenoid coil and the yoke are fixed by epoxy resin.

[0049] According to one embodiment of the present invention, the yoke includes an upper yoke and a lower yoke that are spliced ​​together.

[0050] Specifically, for the static magnetic field generator, the solenoid coil is wound on the support frame, the yoke is spliced ​​in two parts, and epoxy resin is used to cast between the solenoid coil and the yoke. After the epoxy resin solidifies, the wound cooling water pipe is placed between the coil support frame and the solenoid coil.

[0051] For example, the size parameters of the solenoid coil are: coil length 1768mm, inner diameter 1564mm, outer diameter 1590mm, coil thickness 13mm. The material of the coil support frame of the solenoid coil can be stainless steel, and its size parameters are: coil support frame length 1788mm, inner diameter 1494mm, thickness 10mm.

[0052] According to one embodiment of the present invention, the end gate and yoke of the static magnetic field generator are made of electrical pure iron DT4, the support base and the coil support frame are made of stainless steel, and the loading platform is made of a non-magnetic plate.

[0053] For example, the yoke is 2078mm long, the outer diameter is 1684mm, the yoke thickness is 15mm, the end door thickness is 15mm, and there is a through hole with a diameter of 100mm in the center of the end door. The top width of the support base is 1100mm, the length is 1832mm, and the base height is 1020mm. Figure 5 and 6 shown.

[0054] According to an embodiment of the present invention, the magnetic field testing device is a Gauss meter, and the temperature testing device is a thermometer.

[0055] According to one embodiment of the present invention, a platform guide rail is provided on the cargo carrier, and a generator guide rail is provided in the static magnetic generator. The platform guide rail and the generator guide rail are the same. When the two are docked, the cargo carrier and the static magnetic generator are smoothly docked through two guide blocks so that the cargo platform can enter and exit the static magnetic generator through the platform guide rail and the generator guide rail.

[0056] According to one embodiment of the present invention, a handrail is provided on one side of the loading platform and two holes are provided on the side close to the handrail, the platform track is fixed to the loading vehicle through angle irons, a handrail is provided on the loading vehicle and positioning elliptical holes are provided at both ends close to the handrail, which are used to cooperate with the two holes and intercepting rods provided on the loading platform to assist in positioning the loading platform on the loading vehicle.

[0057] According to one embodiment of the present invention, a detachable connection piece is provided between the support base and the cargo carrying vehicle.

[0058] Therefore, by providing a detachable connecting piece between the supporting base and the cargo carrier, the two can be kept integrated during the test to prevent the cargo carrier from tipping over and overturning; after the test, the detachable connecting piece can be removed to allow the cargo carrier to move freely.

[0059] The detachable connector may be a cross-type connector block (also referred to as an anti-dumping connector block), such as Figure 8 shown.

[0060] The loading platform (including the loading platform and the loading vehicle) in the present invention can place an object with a weight of ≮400kg and a size of 1000mm×1000mm×1000mm in the static magnetic field generator. Specifically:

[0061] (1) The length and width of the loading platform can be designed to the maximum extent according to the size of the carrying space inside the static magnetic field generator to ensure that items with a height and width of 1000 mm can be placed normally;

[0062] (2) A 10 mm thick 201 non-magnetic plate can be used as an object placement platform (i.e., a loading platform) to ensure that it can carry objects ≮400 kg;

[0063] (3) The wheels of the loading platform are designed to facilitate the delivery of the 400 kg object to be tested into the magnetic generator. In addition, a handrail can be designed on one side of the loading platform to facilitate the loading platform to be pushed in and out of the static magnetic field generator. The wheels cooperate with the platform rails on the loading vehicle to achieve movement, and the wheels include two brake wheels.

[0064] (4) Two holes are set on both sides of the loading platform near the handrail, and the loading platform is assisted to be positioned on the loading vehicle through the interception rod, and the loading platform is fixed on the loading vehicle through the two brake wheels of the loading platform to prevent the loading platform from sliding back and forth.

[0065] The cargo-carrying vehicle of the present invention can dock a 1000kg object and place it into the static magnetic field generator. Specifically:

[0066] (1) The platform guide rails on the loading tooling vehicle are consistent with the guide rails in the static magnetic generator. When docking, the tooling vehicle and the static magnetic generator can be smoothly docked through two guide blocks to prevent them from being unable to smoothly pick up and place the loading platform due to misalignment;

[0067] (2) Connecting blocks are installed on both sides of the static magnetic field generator support base and the loading platform to ensure their integration during the loading and unloading process, thereby preventing the loading platform from tipping over during the loading and unloading process;

[0068] (3) In order to more conveniently place items at different locations on the loading platform, the loading vehicle can be provided with four wheels (two with brakes), so that items at different locations can be delivered to any location;

[0069] (4) To prevent the loading platform from sliding back and forth during transportation, the track on the loading trolley can be fixed by angle irons, and positioning elliptical holes can be set on the loading trolley near both ends of the handrail to assist in positioning the loading platform together with the two holes on the loading platform and the intercepting rod to prevent it from sliding and falling off.

[0070] like Fig. 9 As shown, the loading platform is on the loading trolley, and the loading platform handrails are fixed to the loading trolley through holes and intercepting rods on both sides; in order to prevent the loading trolley and the static magnetic field generator from tipping over due to uneven force during the loading transportation, an anti-tipping connecting block is set between the loading trolley and the static magnetic field generator as above; after the loading platform enters the static magnetic generator, travel blocks and wedges can be set before and after the static magnetic generator guide rails to ensure that the loading platform does not move during the test.

[0071] In order to make the device under test work in the natural environment temperature of -25℃~+40℃, heat dissipation can be performed within the target flow time (30 minutes). The temperature rise of the solenoid coil is as follows: Fig.10 shown.

[0072] Fig.11 and 12 3D schematic diagram of the water cooling heat dissipation pipeline of the static magnetic field generator. The structure of the water cooling pipeline (cooling water pipe) can be: the spiral water pipe is 1853.5 mm long, the outer diameter is 1560 mm, and the water pipe diameter is 19.5 mm.

[0073] The following describes the workflow of the test system of the present invention with reference to examples, including a mechanical installation process, an electrical power-on process, an electrical power-off process, and a mechanical disassembly process, wherein:

[0074] Mechanical installation process

[0075] 1) Open the door bolt of the static magnetic field generator and fully open the end doors on both sides;

[0076] 2) Push the cargo-carrying vehicle to the static magnetic field generator;

[0077] 3) Align the platform track of the load platform with the generator track of the static magnetic field generator, hoist the test equipment to the middle position of the load platform vehicle through the gantry crane, lock the wheel brakes of the load platform vehicle, determine the test magnetic field direction of the test equipment, and then push the load platform carrying the test equipment into the static magnetic field generator platform;

[0078] 4) Place the Gaussmeter probe in the static magnetic field generator cavity, with the Gaussmeter probe perpendicular to the magnetic field direction;

[0079] 5) Close the right end door of the static magnetic field generator, pass the cables of the test equipment and the Gaussmeter through the through hole in the center of the end door, and finally close the left end door and lock the bolt.

[0080] Electrical power-up process

[0081] 1) Monitor the temperature of the static magnetic field generator through a temperature sensor, and the temperature value should not exceed 50°C;

[0082] 2) Turn on the chiller pump (chiller), and the cold water passes through the refrigeration copper pipe to cool the static magnetic field generator;

[0083] 3) Start the DC power supply, pass a predetermined current value into the static magnetic field generator, and monitor the internal magnetic field of the static magnetic field generator with a gauss meter.

[0084] Electrical power-off process

[0085] 1) Turn off the DC power supply first to power off the static magnetic field generator;

[0086] 2) Turn off the chiller pump and stop cooling;

[0087] Mechanical disassembly process

[0088] 1) Open the door bolt of the static magnetic field generator, open the left end door first, remove the cables of the test equipment and the Gaussmeter, and open the right end door;

[0089] 2) Align the platform track of the cargo platform with the generator track of the static magnetic field generator, and lock the wheel brakes of the cargo loading vehicle;

[0090] 3) Pull the loading platform out of the static magnetic field generator and onto the loading vehicle;

[0091] 4) Change the direction of the equipment under test by truss crane, or remove the equipment under test;

[0092] 5) Close the doors on both sides of the static magnetic field generator and lock the door bolts.

[0093] It can be seen from the above embodiments that the test system for static magnetic field environment testing of electrical equipment according to the present invention has at least the following advantages:

[0094] 1. The present invention is a test system suitable for static magnetic field environment testing of large-scale electrical equipment, which can provide a 40mT static magnetic field test environment for electrical equipment of ultra-high-speed maglev transportation, ultra-high-speed electromagnetic sled and other systems;

[0095] 2. Compared with the current conventional static magnetic field test environment equipment, this test system can provide a reliable and uniform static magnetic field test environment for large-scale electrical equipment;

[0096] 3. The present invention adopts the static magnetic field generator scheme of "solenoid coil + magnetic yoke iron", which can generate a uniform DC magnetic field in a large space;

[0097] 4. The yoke is divided into two parts, upper and lower, to reduce the difficulty of processing a single yoke; epoxy resin is poured between the solenoid coil and the yoke. After the epoxy resin solidifies, the wound cooling water pipe is placed between the coil support frame and the solenoid coil.

[0098] 5. The solenoid coil is wound on the coil frame, which can provide structural support and fixation for the solenoid coil.

[0099] 6. The static magnetic field generator of the present invention is designed with a "cooling copper tube" inside the solenoid coil to cool the solenoid coil and can generate a uniform static magnetic field for a long time (30 minutes).

[0100] 7. A through hole with a diameter of 100 mm is designed at the center of the end door to provide access space for the power supply cables of electrical equipment and the gauss meter cables.

[0101] 8. As a test device with safe, controllable, reusable and high magnetic field uniformity, the 40mT static magnetic field test device has a high frequency of use and a wide test range and needs to have sufficient reliability.

[0102] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0103] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0104] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A test device suitable for static magnetic field environment testing of electrical equipment, characterized in that: The device includes a supporting base, a static magnetic field generator, a direct current power supply, a testing system and a stage. The static magnetic field generator is arranged on the supporting base. The static magnetic field generator includes a solenoid coil, a coil support frame and a yoke. The solenoid coil is wound on the coil support frame. The yoke is arranged on the outside of the solenoid coil. The testing system includes a magnetic field testing device and a temperature testing device. The magnetic field testing device is used to monitor the size of the spatial magnetic field in real time. The temperature testing device is used to monitor the temperature change of the solenoid coil in real time. The stage includes a loading platform and a loading tool vehicle. The loading platform is arranged on the loading tool vehicle. The direct current power supply is located on one side of the supporting base and is used to provide direct current excitation for the solenoid coil. The loading platform is connected to the end face of the static magnetic field generator. The loading tool vehicle carries the electrical equipment to be tested through the loading platform to move, so that the electrical equipment to be tested can be transported to or out of the static magnetic field generator. When the solenoid coil is powered on, it generates a spatially uniform direct current magnetic field under the magnetic field constraint of the yoke.

2. The device according to claim 1, characterized in that The device also includes a water cooling unit located at the other side of the support base, and the static magnetic field generator also includes a cooling water pipe connected to the water cooling unit, and the cooling water pipe is arranged between the solenoid coil and the coil support frame.

3. The device according to claim 2, characterized in that The cooling water pipe is a spiral copper pipe.

4. The device according to claim 1, characterized in that The solenoid coil and the yoke are fixed by epoxy resin.

5. The device according to claim 4, characterized in that The yoke comprises an upper yoke and a lower yoke which are spliced ​​together.

6. The device according to claim 5, characterized in that The end gate and yoke of the static magnetic field generator are made of electrical pure iron DT4, the support base and coil support frame are made of stainless steel, and the loading platform is made of non-magnetic plate.

7. The device according to claim 6, characterized in that The magnetic field test equipment is a Gauss meter, and the temperature test equipment is a thermometer.

8. The device according to claim 7, characterized in that A platform guide rail is provided on the cargo transport vehicle, and a generator guide rail is provided in the static magnetic generator. The platform guide rail and the generator guide rail are the same. When the two are docked, the cargo transport vehicle and the static magnetic generator are smoothly docked through two guide blocks so that the cargo platform can enter and exit the static magnetic generator through the platform guide rail and the generator guide rail.

9. The device according to claim 8, characterized in that A handrail is provided on one side of the loading platform and two holes are provided on the side close to the handrail. The platform track is fixed to the loading vehicle through angle irons. A handrail is provided on the loading vehicle and positioning elliptical holes are provided at both ends close to the handrail, which are used to cooperate with the two holes and intercepting rods provided on the loading platform to assist in positioning the loading platform on the loading vehicle.

10. The device according to claim 9, characterized in that A detachable connecting piece is arranged between the supporting base and the cargo carrying tooling vehicle.

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