A magnetic measurement device

Abstract

The present invention discloses a magnetic measurement device, comprising a measuring body, a longitudinal channel disposed at the center of the measuring body, a lifting system, an intermediate system, a top block, and a pressure gauge associated with the intermediate system disposed from top to bottom within the longitudinal channel. The bottom surface of the measuring body and the bottom surface of the top block are flush and form a common contact plane with a magnetic module. One of the measuring body and the top block is magnetically conductive, while the other is non-magnetic. When the lifting system is subjected to an external force, it can drive the intermediate system to move upward or downward within the longitudinal channel to apply force to the top block, lifting or pushing the top block to lift the measuring body upward. The pressure gauge records the maximum force applied to the top block, and a magnetic value can be obtained through calculation. The present invention is not affected by differences in operator, time, or location, and can obtain accurate magnetic measurement values, thus having high practical value in practice.

Description

Technical Field

[0001] The present invention relates to the field of magnetic measurement, in particular to a magnetic measurement device. Background Art

[0002] At present, magnetic modules are widely used in various machinery and transportation fields. In many scenarios, the magnetic force of the magnetic module needs to be accurately measured to meet the needs of the project. Usually, when the magnetic force needs to be measured, a spring scale is needed to directly pull up the test workpiece. However, in the prior art, when a spring scale is used to directly pull up the test workpiece, due to individual differences, the speed at which each person pulls up the test workpiece is bound to be different, and even for the same person, the pulling speed at different time points cannot be kept completely consistent. As a result, when a spring scale is used to pull up the test workpiece for magnetic force detection, the results obtained vary from person to person and from time to time, and the spring scale cannot be maintained at the maximum value, and the most accurate measurement results cannot be obtained.

[0003] Therefore, it is necessary to design a more accurate magnetic measurement device to better meet engineering and safety requirements. Summary of the Invention

[0004] The present invention discloses a magnetic measuring device, comprising a measuring body, a longitudinal channel being arranged at the center of the measuring body, a lifting system, an intermediate system, a top block, and a pressure gauge associated with the intermediate system being arranged from top to bottom in the longitudinal channel, the bottom surface of the measuring body and the bottom surface of the top block being flush and forming the same contact plane for contacting a magnetic module, one of the measuring body and the top block being magnetically conductive and the other being non-magnetic, and when the lifting system is subjected to an external force, it can drive the intermediate system to move upward or downward in the longitudinal channel to apply force to the top block, thereby lifting the top block upward or pushing the top block to lift the measuring body upward, and the pressure gauge records the maximum force value of the top block.

[0005] Furthermore, the lifting system includes a retaining spring and a screw rod, and the screw rod can be inserted with a wrench to apply external force.

[0006] Preferably, the screw is a screw with a hexagonal head, and the wrench is a hexagonal wrench.

[0007] As a preferred embodiment, the pressure gauge is a memory-type pressure gauge. The intermediate system includes a pressure block, a spring connected to the lower end of the pressure block, and hydraulic oil. The longitudinal channel between the pressure block and the top block forms a sealed cavity. The sealed cavity is filled with hydraulic oil. The sealed cavity is connected to the memory-type pressure gauge. When the pressure block is pushed downward by force, the hydraulic pressure in the sealed cavity is transmitted to the memory-type pressure gauge, so that the memory-type pressure gauge obtains the maximum force value.

[0008] Preferably, one or more sealing rings are provided on the outside of the pressing block, and one or more sealing rings are provided on the outside of the top block.

[0009] Furthermore, a through hole communicating with the external space of the measuring body is provided at the lower portion of the sealed cavity, and the through hole is sealed by a plug.

[0010] Preferably, the sealed cavity is an inverted T-shaped sealed cavity.

[0011] As a preferred embodiment, the pressure gauge is an electronic pressure gauge, and the intermediate system includes a pressure block, a screw and a pressure sensor. The upper part of the pressure block wraps the lower part of the screw, and the pressure sensor is arranged under the screw. The upper and lower ends of the pressure sensor are respectively provided with a threaded column, and the lower part of the pressure block wraps the threaded column at the upper end of the pressure sensor. The electronic pressure gauge is connected to the pressure sensor to obtain the maximum force value.

[0012] Furthermore, the electronic pressure gauge is provided with a digital display screen to display the maximum force value.

[0013] Preferably, when the measuring body is magnetic and the top block is non-magnetic, the material of the measuring body is low carbon steel and the material of the top block is copper; when the measuring body is non-magnetic and the top block is magnetic, the material of the measuring body is copper and the material of the top block is low carbon steel.

[0014] The magnetic measuring device disclosed herein has a bottom surface of the measuring body and a bottom surface of the top block flush and forming the same contact plane with the magnetic module. When the lifting system is subjected to a downward pressing force, the lifting system pushes the intermediate system downward, thereby pushing the top block downward to press the upper surface of the magnetic module. Since the force is mutual, when the reaction force received can offset the magnetic force and the weight of the measuring body itself, the measuring body will be pushed upward, so that the required reaction force can be recorded to obtain the maximum force value, thereby calculating an accurate magnetic value; or when the lifting system is subjected to an upward pulling force, the lifting system drives the intermediate system upward, pulls up the top block to offset the magnetic force and the weight of the top block itself and leave the contact plane. At this time, the maximum force value obtained by measurement and recording can be calculated to obtain the magnetic value. In the present invention, when people use an internal angle wrench to rotate a screw with a hexagonal head, it is easy to achieve uniform rotation, and it is relatively stable when applying pressing force or pulling force. Therefore, the measurement results are not affected by different operators, time or location, and accurate magnetic measurement values ​​can be obtained, which has high practical value in practice.

[0015] In order to make the above contents of the present invention more clearly understood, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be described below with reference to the accompanying drawings.

[0017] Figure 1 is a schematic cross-sectional view of a magnetic force measurement device disclosed in a first embodiment of the present invention;

[0018] Figure 2is a cross-sectional schematic diagram of a magnetic force measurement device disclosed in a second embodiment of the present invention;

[0019] Figure 3 1 is a top view of a magnetic measurement device disclosed in various embodiments of the present invention.

[0020] Description of labels:

[0021] Measuring body 1 Longitudinal channel 2 Pressure gauge 3 Magnetic module 4

[0022] Lifting system 21 Circlip 211 Screw 212

[0023] Intermediate system 22 pressure block 221 spring 222 hollow elastic pin 223 sealing ring 224 plug 225

[0024] Screw 226 Pressure sensor 227 Threaded column 228 Hydraulic oil 229 Top block 23 Sealing chamber 24 DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present invention using specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0026] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to provide a thorough and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, identical units / elements are labeled with the same reference numerals.

[0027] Unless otherwise specified, the terms used herein (including technical terms) have the meanings commonly understood by those skilled in the art. In addition, it is understood that terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0028] First embodiment

[0029] like Figure 1As shown, the first embodiment of the present invention discloses a magnetic measuring device, including a measuring body 1, a longitudinal channel 2 is arranged in the center of the measuring body 1 along its axial direction, and a lifting system 21, an intermediate system 22, a top block 23, and a pressure gauge 3 associated with the intermediate system 22 are arranged inside the longitudinal channel 2 from top to bottom. The bottom surface of the measuring body 1 and the bottom surface of the top block 23 are flush and form the same contact plane of the contact magnetic module. One of the measuring body 1 and the top block 23 is magnetic and the other is not magnetic. When the lifting system 21 is subjected to external force, it can drive the intermediate system 22 to move upward or downward in the longitudinal channel 2 to apply force to the top block 23, lift the top block 23 upward or push the top block 23 to lift the measuring body 1 upward, and the pressure gauge 3 records the maximum force value of the top block 23.

[0030] Specifically, the pressure gauge 3 of this embodiment is an electronic pressure gauge. The electronic pressure gauge is equipped with a digital display screen that can display digitally and more intuitively the measured magnetic force, which requires less operator input and makes measurement more convenient. The intermediate system 22 includes a pressure block 221, a screw 226, and a pressure sensor 227. The upper portion of the pressure block 221 wraps around the lower portion of the screw 226. The pressure sensor 227 is disposed below the screw 226. The pressure sensor 227 has a threaded column 228 at each end. The lower portion of the pressure block 221 wraps around the threaded column 228 at the upper end of the pressure sensor 227. The electronic pressure gauge is connected to the pressure sensor 227 to obtain the maximum force value.

[0031] The pressure sensor 227 is generally composed of a pressure sensitive element and a signal processing unit. The pressure sensor 227 can sense pressure. Threaded columns are provided at both ends of the pressure sensor 227. When opposite forces are applied to the threaded columns at both ends, the pressure sensor can measure pressure. When opposite forces are applied to the threaded columns at both ends, the pressure sensor can measure tension. The pressure sensor 227 can convert the magnitude of the force into a corresponding electrical signal output. The pressure gauge 3 of this embodiment is an electronic pressure gauge, which can be placed outside the measuring body (such as Figure 1 It can also be embedded in the measurement subject as required.

[0032] In the magnetic measurement device disclosed in this embodiment, one of the measuring body 1 and the top block 23 is magnetic and the other is non-magnetic. If both are made of the same magnetic material, they will be attracted to each other due to the small gap between them, and the adsorption force will affect the final measurement result.

[0033] In the magnetic measuring device disclosed in this embodiment, when the material of the measuring body 1 is a magnetic conductive material and the material of the top block 23 is a non-magnetic conductive material, when the magnetic measuring device of the present invention is placed on the upper surface of the magnetic module, the measuring body 1 and the magnetic module are attracted to each other. When measuring, a downward pressing force is applied to the lifting system 21, pushing the pressure block 221 of the intermediate system 22 to apply downward pressure. The lower part of the pressure block 221 wraps around the threaded column 228 at the upper end of the pressure sensor 227, so that the threaded columns 228 at both ends of the pressure sensor 227 are subjected to opposite forces. The pressure sensor 227 senses the pressure and converts the pressure into an electrical signal and outputs it to the electronic pressure gauge. The digital display screen of the electronic pressure gauge (such as an LCD or LED display screen) converts the input electrical signal into a pressure value for digital display.

[0034] As the pressure block 221 continues to move downward, the top block 23 is subjected to a downward pressing force, so that the top block 23 is pressed tightly against the magnetic module. At the same time, the bottom surface of the measuring body 1 is subjected to an upward reaction force. When the reaction force is sufficient to offset the magnetic adsorption force between the measuring body 1 and the magnetic module and the weight of the measuring body 1 itself, the magnetic measuring body 1 is pushed upward. At this time, the pressure sensor 227 receives the maximum force, so that the electronic pressure gauge measures the maximum force value and digitally displays the maximum force value on the digital display screen. The magnetic value can be obtained by calculating this maximum force value.

[0035] When the material of the measuring body 1 is non-magnetic and the material of the top block 23 is magnetic, the bottom surface of the measuring body 1 and the bottom surface of the top block 23 are flush, forming the same contact plane with the magnetic module. When the magnetic measuring device of the present invention is placed on the upper surface of the magnetic module, the top block 23 and the magnetic module are adsorbed on each other.

[0036] When measuring, an upward pulling force is applied to the lifting system 21, and the step of the lifting system 21 drives the screw 226 of the intermediate system 22 to move upward along the axial direction of the longitudinal channel 2. During the upward movement of the screw 226, the pressure block 221 wrapped around the lower part of the screw 226 is lifted upward. Since the lower part of the pressure block 221 simultaneously wraps the threaded column 228 at the upper end of the pressure sensor 227, a pulling force can be applied to the threaded column 228, so that the threaded columns at both ends of the pressure sensor 227 are subjected to opposite forces. The pressure sensor 227 senses the pulling force, converts the pulling force into an electrical signal and outputs it to the electronic pressure gauge. The digital display screen of the electronic pressure gauge (such as an LCD or LED display screen) converts the input electrical signal into a pulling force value for digital display.

[0037] As the pressure block 221 continues to move upward, the top block 23 is subjected to a continuously increasing upward pulling force. When the force on the top block 23 is sufficient to offset the magnetic adsorption force between the top block 23 and the magnetic module and the weight of the top block 23 itself, the top block 23 is lifted up and leaves the contact plane. At this time, the pressure sensor 227 receives the maximum force, so the electronic pressure gauge measures the maximum force value and digitally displays the maximum force value on the digital display screen. The magnetic value can be obtained by calculating this maximum force value.

[0038] During the entire process, the magnetic module must remain stable and still to ensure accurate relative movement between the magnetic measurement device and the magnetic module to avoid affecting the accuracy of the results.

[0039] After the test is completed, the lifting system 21 can be adjusted to restore the top block to its original state in preparation for the next measurement.

[0040] In this embodiment, if Figure 1 As shown, the lifting system 21 includes a retaining ring 211 and a screw 212, wherein the retaining ring 211 is also called a retaining ring or a snap ring, which is a type of fastener and is installed in the shaft groove or hole groove of the machine or equipment to prevent the screw from running out of the measuring body. The screw 212 is used to insert a wrench to generate a pressing force, preferably a screw and a hexagonal wrench with an inner hexagonal head. In actual use, the required pressure can be generated by inserting the inner hexagonal wrench into the screw 212 and rotating the screw clockwise, and the intermediate system 22 can be pushed far enough to lift the magnetic measuring body 1 from the magnetic suction cup when the magnetic force reaches its limit; or the inner hexagonal wrench is inserted into the screw 212 and rotated counterclockwise to generate the required pulling force to pull the top block upward.

[0041] The magnetic measurement device of the first embodiment of the present invention uses an electronic pressure gauge to measure and display the force value. The measurement results are not affected by different operators, time or location. The electronic pressure gauge can also be maintained at the maximum value, and accurate force values ​​can be obtained. The electronic pressure gauge is more convenient to use and has lower requirements for operators. It has high practical value in practice.

[0042] Second embodiment

[0043] like Figure 2As shown, the second embodiment of the present invention discloses a magnetic measuring device, including a measuring body 1, a longitudinal channel 2 is arranged in the center of the measuring body 1 along its axial direction, and a lifting system 21, an intermediate system 22, a top block 23, and a pressure gauge 3 associated with the intermediate system 23 are arranged inside the longitudinal channel 2 from top to bottom. The bottom surface of the measuring body 1 and the bottom surface of the top block 23 are flush and form the same contact plane of the contact magnetic module. The measuring body 1 is magnetic and the top block 23 is not magnetic. When the lifting system 21 is subjected to external force, it can drive the intermediate system 22 to move upward or downward in the longitudinal channel 2. When the intermediate system 22 moves downward, it pushes the top block 23 to press the upper surface of the magnetic module to lift the measuring body 1 upward. The pressure gauge 3 records the maximum force value of pushing the top block 23 to lift the measuring body 1.

[0044] Specifically, the shape of the measuring body 1 of this embodiment can be cylindrical or square, or other shapes that can be conceived by those skilled in the art without creative work, and is not limited by the disclosure of this embodiment.

[0045] Specifically, the pressure gauge 3 is a memory-type pressure gauge. The intermediate system 22 includes a pressure block 221, a spring 222 connected to the lower end of the pressure block 221, and hydraulic oil 229. The longitudinal channel between the pressure block 221 and the top block 23 forms a sealed chamber 24, which is filled with hydraulic oil 229. The other end of the spring 222 is connected to a hollow elastic pin 223, preferably a C-shaped hollow elastic pin, to support the spring 222. A transverse through hole is provided in the main wall of the measuring body 1. As a preferred embodiment, the two ends of the through hole can respectively connect the hollow elastic pin 223 and the memory-type pressure gauge 3 to form a transverse channel. The sealed chamber 24 is connected to the memory-type pressure gauge 3 via this transverse channel. When the pressure block 221 is pushed downward by force, the hydraulic pressure in the sealed chamber 24 is transmitted to the memory-type pressure gauge to obtain the maximum force value. Alternatively, the hollow elastic pin 223 can also extend into the entire through hole and form a transverse channel directly connected to the memory pressure gauge 3. When the pressure block 221 is pushed downward by force, the hydraulic pressure in the sealing cavity 24 is transmitted to the memory pressure gauge to obtain the force value.

[0046] The memory pressure gauge in this embodiment is composed of an original type pressure gauge (ordinary pressure gauge, shock-resistant pressure gauge, stainless steel pressure gauge, etc.) and a memory device. The characteristic of the memory pressure gauge is that it can accurately record the maximum value of the measurement without human intervention. As the pressure of the measured medium increases, its pressure pointer rises and also drives the memory needle to rise. When the pressure of the measured medium decreases and the pressure pointer drops, the memory needle remains at the maximum value position. The memory pressure gauge can be placed outside the measuring body (such as Figure 2It can also be embedded in the measurement subject as required.

[0047] The magnetic measurement device disclosed in this embodiment has a measuring body 1 made of a magnetic material, preferably low-carbon steel, and a top block 23 made of a non-magnetic material, preferably copper.

[0048] The bottom surface of the measuring body 1 is flush with the bottom surface of the top block 23, forming the same contact plane with the magnetic module. When the magnetic measuring device of the present invention is placed on the upper surface of the magnetic module, the measuring body 1 and the magnetic module are adsorbed on each other.

[0049] When measuring, downward pressing force is applied to the lifting system 21, pushing the intermediate system 22 to move downward along the axial direction of the longitudinal channel 2. The intermediate system 22 includes a pressure block 221 and a spring 222 connected to the lower end of the pressure block. The pressure block 221 moves downward under the force, and the spring 222 is elastically compressed. The internal space of the sealed cavity 24 is reduced, so that the hydraulic strength stored in the sealed cavity 24 increases and is transmitted to the memory pressure gauge 3 through the transverse channel. The pressure pointer of the memory pressure gauge 3 points to the pressure size.

[0050] As the pressure block 221 continues to move downward, the top block 23 is subjected to a downward pressing force, so that the top block 23 presses the magnetic module tightly and applies a downward pressing force to the magnetic module. At the same time, the bottom surface of the measuring body 1 is subjected to an upward reaction force. When the reaction force is sufficient to offset the magnetic adsorption force between the measuring body 1 and the magnetic module and the weight of the measuring body 1 itself, the magnetic measuring body 1 is pushed upward. At this time, the pressure gauge obtains the maximum hydraulic pressure and thus measures the maximum force value. The pressure pointer reaches the highest pressure, and then the pressure decreases. The memory needle will stay at the position of the highest pressure just now, so that the staff can clearly know the highest pressure value. This highest pressure value can be calculated to obtain the magnetic value.

[0051] During the entire process, the magnetic module must remain stable and still to ensure accurate relative movement between the magnetic measurement device and the magnetic module to avoid affecting the accuracy of the results.

[0052] After the test is completed, the lifting system 21 can be adjusted to restore the top block to its original state in preparation for the next measurement.

[0053] In this embodiment, if Figure 2As shown, the lifting system 21 includes a retaining ring 211 and a screw 212. The retaining ring 211, also called a retaining ring or snap ring, is a type of fastener that is installed in the shaft slot or hole slot of a machine or equipment to prevent the screw from running out of the measuring body. The screw 212 is used to insert a wrench to generate pressing force, preferably a screw with an internal hexagonal head and an internal hexagonal wrench. In actual use, the required pressure can be generated by inserting the internal hexagonal wrench into the screw 212 and turning the screw clockwise. The intermediate system 22 can be pushed far enough to lift the magnetic measuring body 1 from the magnetic suction cup when the magnetic force reaches its limit.

[0054] Further, if Figure 2 As shown, one or more sealing rings 224 are provided on the outside of the pressure block 221 of this embodiment, and correspondingly, multiple sealing rings 224 are also provided on the outside of the top block 23. Since the longitudinal channel between the pressure block 221 and the top block 23 is isolated as a sealed cavity 24 for storing hydraulic oil 229, sealing rings 224 are respectively provided on the outside of the pressure block 221 and the top block 23, which can better play a sealing role and prevent the hydraulic oil 229 from leaking.

[0055] Furthermore, a through hole is provided at the bottom of the sealed cavity 24, communicating with the external space of the measuring body 1. Hydraulic oil 229 is injected into the sealed cavity 24 in advance. During the injection, the through hole can be used to expel air from the sealed cavity 24. The through hole is then sealed with a plug 225 to prevent leakage of the hydraulic oil 229 and maintain the hydraulic oil 229 inside the sealed cavity 24.

[0056] In this embodiment, the sealing cavity 24 is an inverted T-shaped structure, and the upper part of the inverted T-shaped structure is a narrow channel, in which hydraulic oil 229, a spring 222 and a hollow spring pin 223 can be placed. The entire internal space of the inverted T-shaped structure stores hydraulic oil 229 to form downward pressure on the top block 23.

[0057] The magnetic force measuring device of the second embodiment of the present invention uses a memory pressure gauge to measure and display the hydraulic pressure value to know the magnitude of the magnetic force. The measurement result is not affected by different operators, time or location. It can obtain accurate magnetic force measurement values ​​and has high practical value in practice.

[0058] It should be noted that in practical applications, the magnetic force per unit area is the most meaningful comparison. The magnetic force per unit area can be obtained by dividing the measured magnetic force by the effective contact magnetic conductive area. Figure 3 The top view of the magnetic measurement device of this embodiment placed on the magnetic module 4 is shown as follows: Figure 3 As shown, the shape of the measuring body 1 of this embodiment can be cylindrical, square column, or other shapes that can be conceived by those skilled in the art without creative work, and is not limited to the disclosure of this embodiment.

[0059] To sum up, in the magnetic measuring device involved in the present invention, the bottom surface of the measuring body and the bottom surface of the top block are flush and form the same contact plane of the contact magnetic module. When the lifting system is subjected to a downward pressing force, the lifting system pushes the intermediate system to move downward, and then pushes the top block to press the upper surface of the magnetic module downward. Since the force is mutual, when the reaction force received can offset the magnetic force and the weight of the measuring body itself, the measuring body will be pushed upward, so that the required reaction force can be recorded to obtain the maximum force value, and thus the accurate magnetic value can be calculated; or when the lifting system is subjected to an upward pulling force, the lifting system drives the intermediate system to move upward, pulls up the top block to offset the magnetic force and the weight of the top block itself to leave the contact plane, and at this time the maximum force value recorded is measured, and the accurate magnetic value can be obtained by calculation. In the present invention, when people use an internal angle wrench to rotate a screw with a hexagonal head, it is easy to achieve uniform rotation, and it is relatively stable when applying pressing force or pulling force. Therefore, the measurement results are not affected by different operators, time or location, and accurate magnetic measurement values ​​can be obtained, which has high practical value in practice.

[0060] Furthermore, the above-described embodiments of the present invention are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person skilled in the art may modify or alter the above-described embodiments without departing from the spirit and scope of the present invention. Therefore, any equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concepts disclosed herein shall still be covered by the claims of the present invention.

Claims

1. A magnetic measuring device, comprising a measuring body, a longitudinal channel provided at the center of the measuring body, a lifting system, an intermediate system, a top block, and a pressure gauge associated with the intermediate system provided from top to bottom in the longitudinal channel, the bottom surface of the measuring body and the bottom surface of the top block being flush and forming a common contact plane with a magnetic module, the measuring body being magnetic and the top block being non-magnetic, the lifting system being able to drive the intermediate system to move downward in the longitudinal channel when subjected to an external force, thereby applying force to the top block, pushing the top block to lift the measuring body upward, and the pressure gauge recording a maximum force value applied to the top block; in, The pressure gauge is an electronic pressure gauge, and the intermediate system includes a pressure block, a screw, and a pressure sensor. The upper part of the pressure block wraps the lower part of the screw, and the pressure sensor is arranged below the screw. The upper and lower ends of the pressure sensor are respectively provided with a threaded column. The lower part of the pressure block wraps the threaded column at the upper end of the pressure sensor. The electronic pressure gauge is connected to the pressure sensor to obtain the maximum force value; or In which, the pressure gauge is a memory type pressure gauge, the intermediate system includes a pressure block, a spring connected to the lower end of the pressure block and hydraulic oil, the longitudinal channel between the pressure block and the top block forms a sealed cavity, the sealed cavity is filled with the hydraulic oil, the sealed cavity is connected to the memory type pressure gauge, and when the pressure block is pushed downward by force, the hydraulic pressure in the sealed cavity is transmitted to the memory type pressure gauge, so that the memory type pressure gauge obtains the maximum force value.

2. The magnetic measurement device according to claim 1, characterized in that The lifting system includes a retaining spring and a screw rod, and the screw rod can be inserted with a wrench to apply external force.

3. The magnetic measurement device according to claim 2, characterized in that The screw is a screw with a hexagonal head, and the wrench is a hexagonal wrench.

4. The magnetic measurement device according to claim 1, characterized in that When the pressure gauge is a memory type pressure gauge, one or more sealing rings are provided on the outside of the pressure block, and one or more sealing rings are provided on the outside of the top block.

5. The magnetic measurement device according to claim 1, characterized in that When the pressure gauge is a memory type pressure gauge, a through hole communicating with the external space of the measuring body is provided at the lower portion of the sealed cavity, and the through hole is sealed by a plug.

6. The magnetic measurement device according to claim 1, characterized in that When the pressure gauge is a memory type pressure gauge, the sealing cavity is an inverted T-shaped sealing cavity.

7. The magnetic measurement device according to claim 1, characterized in that When the pressure gauge is an electronic pressure gauge, the electronic pressure gauge is provided with a digital display screen to display the maximum force value.

8. The magnetic measurement device according to any one of claims 1 to 7, characterized in that: When the measuring body is magnetic and the top block is non-magnetic, the measuring body is made of low-carbon steel and the top block is made of copper.

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