A sample injection tool for a permanent magnet pulse measurement instrument

Abstract

This utility model discloses a sample injection tool for a permanent magnet pulse measuring instrument, comprising: a sample injection tube, one end of which is fixed with an annular baffle, the outer diameter of which matches the inner diameter of the sample tube; a push rod, slidably connected inside the sample injection tube, one end of which extends out of the sample injection tube, and the end of which is located inside the sample injection tube has a groove along the axial direction; a non-magnetic rod, slidably connected inside the groove, with a spring fixed between the end of the non-magnetic rod and the end of the groove; an iron rod, coaxially fixed to one end of the non-magnetic rod, one end of which extends out of the central hole of the annular baffle and is fixedly connected to a pad, the sample being magnetically attracted to the pad; a positioning ring, coaxially fixed to the iron rod, abutting against the annular baffle; and a magnetic ring, fixed to the end of the push rod, the magnetic ring and the iron rod being arranged correspondingly. This utility model can achieve accurate sample injection and effectively reduce measurement errors caused by sample injection position deviations.

Description

Technical Field

[0001] This utility model relates to the field of sample introduction device technology, and in particular to a sample introduction tool for a permanent magnet pulse measuring instrument. Background Technology

[0002] Before testing the magnetic properties of ultra-high coercivity permanent magnet materials, the sample must be placed in a specially designed sample rod. The test rod consists of three parts: upper, middle, and lower, which can be rotated open. When the sample is small or thin, the middle section sleeve has a small diameter and a long length, making it easy for the sample to fall into the side space if placed manually. This often requires repeated attempts and may still not result in a stable sample placement.

[0003] To address the aforementioned technical issues, this utility model provides a sample introduction tool for a permanent magnet pulse measuring instrument. Utility Model Content

[0004] The purpose of this invention is to provide a sample introduction tool for a permanent magnet pulse measuring instrument to solve the problems existing in the prior art.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides a sample introduction tool for a permanent magnet pulse measuring instrument, comprising:

[0006] A sample inlet tube, one end of which is fixed with an annular baffle, and the outer diameter of the sample inlet tube matches the inner diameter of the sample tube;

[0007] A push rod is slidably connected inside the injection tube, with one end of the push rod extending out of the injection tube, and a groove is provided along the axial direction at the end of the push rod located inside the injection tube;

[0008] A non-magnetic rod is slidably connected within the groove, and the length of the non-magnetic rod is less than the length of the groove. A spring is fixed between the end of the non-magnetic rod and the end of the groove.

[0009] An iron rod is coaxially fixed to one end of a non-magnetic rod. One end of the iron rod extends out of the central hole of the annular baffle and is fixedly connected to a pad. The sample is magnetically attracted to the pad.

[0010] A positioning ring is coaxially fixed to the iron rod, and the positioning ring abuts against the annular baffle.

[0011] A magnetic ring is fixed to the end of the push rod, and the magnetic ring is arranged correspondingly to the iron rod.

[0012] According to the sample feeding tool for a permanent magnet pulse measuring instrument provided by this utility model, the inner wall of the slide groove is symmetrically fixedly connected with positioning strips, and the outer wall of the non-magnetic rod is provided with a slot along the axial direction, and the slot and the positioning strip are slidably engaged.

[0013] According to the sample feeding tool for a permanent magnet pulse measuring instrument provided by this utility model, the diameter of the non-magnetic rod is larger than the diameter of the iron rod.

[0014] According to the sample injection tool for a permanent magnet pulse measuring instrument provided by this utility model, the diameter of the pad is larger than the inner diameter of the annular baffle, and it abuts against the end of the annular baffle away from the sample injection tube.

[0015] According to the sample injection tool for a permanent magnet pulse measuring instrument provided by this utility model, the difference between the outer diameter of the push rod and the inner diameter of the sample injection tube is 1mm-2mm.

[0016] According to the sample injection tool for a permanent magnet pulse measuring instrument provided by this utility model, the end of the sample injection tube and the end of the push rod are respectively fixed with handles, and the push rod passes through the handles at the end of the sample injection tube.

[0017] The present invention discloses the following technical effects:

[0018] The close fit between the injection tube and the sample tube reduces shaking and offset during the injection process, ensuring that the sample can enter the designated position in the sample tube accurately and stably, which greatly improves the injection accuracy and provides a reliable basis for subsequent permanent magnet pulse measurement, effectively reducing the measurement error caused by injection position deviation.

[0019] The magnetic ring magnetizes the iron rod, allowing the pad to stably adsorb the sample. During sample injection, the sample position remains fixed and does not shift due to external factors. Once the injection position is reached, a push rod is controlled to move the magnetic ring away from the iron rod, achieving accurate separation of the sample from the pad and ensuring precise sample positioning within the sample tube.

[0020] Operators can complete sample adsorption, injection, and separation operations simply by manually pushing and pulling the push rod. The whole process is simple and easy to understand, requiring no complicated training to get started, which greatly improves work efficiency and is especially suitable for experimental scenarios that require frequent sample injection.

[0021] The device's components respond quickly. From pushing the push rod to adsorb the sample to completing the injection and withdrawing the injection tube, the entire process can be completed in a short time, reducing injection time and improving the continuity and efficiency of the experiment.

[0022] The sample is firmly attached to the pad by magnetic attraction, and will not fall off or shift during the sample injection process. This avoids sample loss or contamination caused by sample shaking or falling, ensuring the integrity and stability of the sample and facilitating accurate measurement results.

[0023] By using a magnetic ring to separate the sample naturally from the iron rod, mechanical force is avoided from impacting and damaging the sample. This method is especially suitable for samples that are sensitive to mechanical stress and ensures the consistency of the sample's state before and after injection. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the sample introduction tool of the present invention used in a permanent magnet pulse measuring instrument;

[0026] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0027] The components are: 1. Injection tube; 2. Annular baffle; 3. Push rod; 4. Slide groove; 5. Non-magnetic rod; 6. Iron rod; 7. Pad; 8. Positioning ring; 9. Magnet ring; 10. Handle. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figure 1-2 This utility model provides a sample introduction tool for a permanent magnet pulse measuring instrument, comprising:

[0031] The sample inlet tube 1 has an annular baffle 2 fixed at one end, and the outer diameter of the sample inlet tube 1 matches the inner diameter of the sample tube.

[0032] Push rod 3 is slidably connected inside the injection tube 1. One end of push rod 3 extends out of the injection tube 1. A groove 4 is provided along the axial direction at the end of push rod 3 inside the injection tube 1.

[0033] A non-magnetic rod 5 is slidably connected in the slide groove 4, and the length of the non-magnetic rod 5 is less than the length of the slide groove 4. A spring is fixed between the end of the non-magnetic rod 5 and the end of the slide groove 4.

[0034] Iron rod 6 is coaxially fixed to one end of non-magnetic rod 5. One end of iron rod 6 extends out of the central hole of annular baffle 2 and is fixedly connected to pad 7. The sample is magnetically attracted to pad 7.

[0035] Positioning ring 8 is coaxially fixed on iron rod 6, and positioning ring 8 abuts against annular baffle 2;

[0036] Magnet ring 9 is fixed to the end of push rod 3, and magnet ring 9 is arranged correspondingly to iron rod 6.

[0037] Before initiating sample injection, the injection tool must be thoroughly inspected to ensure all components are securely connected and functioning correctly. Check that the surface of the injection tube 1 is smooth and free from deformation, and that its outer diameter precisely matches the inner diameter of the sample tube to ensure smooth and accurate injection. The push rod 3 should slide freely within the injection tube 1 without jamming. The non-magnetic rod 5 should fit tightly and slide smoothly with the groove 4, and the spring should have normal elasticity without damage or fatigue. The iron rod 6 must be securely connected to the pad 7, and the surface of the pad 7 should be flat to ensure stable sample adsorption. The positioning ring 8 should be coaxially and securely fixed to the iron rod 6, and its contact surface with the annular baffle 2 should be free from wear or deformation. The magnetic ring 9 must be securely fixed to the end of the push rod 3 and accurately correspond to the position of the iron rod 6 to ensure effective magnetic attraction. After confirming the tool is in good condition, place the sample to be tested in a suitable position, ready for injection. Manually push the push rod 3: The operator holds the end of the push rod 3 extending from the sample inlet tube 1 and slowly pushes the push rod 3 with appropriate force and speed. At this time, the push rod 3 slides relative to the sample inlet tube 1. Due to the sliding friction between the push rod 3 and the sample inlet tube 1, the operator needs to maintain a stable pushing force to ensure that the push rod 3 moves smoothly. As the push rod 3 moves, the rod assembly consisting of the non-magnetic rod 5 and the iron rod 6 slides relative to each other synchronously in the groove 4. When the non-magnetic rod 5 slides in the groove 4, there is a small friction between it and the wall of the groove 4. The operator needs to overcome this friction to continue pushing the push rod 3. During the sliding process, the spring is gradually compressed by the pressure of the end of the non-magnetic rod 5, and the elastic potential energy of the spring continues to increase. When the push rod 3 is pushed to a certain position, the magnetic ring 9 contacts the iron rod 6. The strong magnetic field generated by the magnetic ring 9 magnetizes the iron rod 6. The magnetic domains inside the iron rod 6 quickly rearrange under the action of the magnetic field, making the iron rod 6 magnetized, and thus making the pad 7 also have a certain magnetism. At this point, the operator should slowly bring the pad 7 close to the sample, using the magnetism of the pad 7 to accurately and stably magnetically attract the sample onto it. During the sample adsorption process, it is necessary to ensure good contact between the sample and the pad 7, without loosening or shifting, to guarantee the accuracy of sample injection. After the sample is adsorbed onto the pad 7, the operator holds the injection tube 1 and carefully inserts it into the sample tube. During insertion, it is necessary to ensure that the injection tube 1 is coaxial with the sample tube to avoid the sample failing to reach the designated position or damaging the sample tube due to skewness. At the same time, the insertion speed must be controlled to prevent impact force caused by excessive speed, which could affect the state of the sample and the injection accuracy. When the sample reaches the predetermined injection position with the injection tube 1, the operator stops the insertion action and begins to pull the push rod 3 outward. During the pulling of the push rod 3, the push rod 3 drives the magnetic ring 9 to move backward, the distance between the magnetic ring 9 and the iron rod 6 gradually increases, and the magnetization effect of the magnetic ring 9 on the iron rod 6 gradually weakens. As the magnet ring 9 moves further away, the magnetic field strength at the location of the iron rod 6 gradually decreases, and the magnetic domain arrangement inside the iron rod 6 gradually becomes disordered.After a short period, the magnetism of iron rod 6 essentially disappears, and pad 7 also loses its magnetism. At this point, the sample, no longer subject to the magnetic attraction of pad 7, naturally separates from pad 7 and falls accurately into the designated position inside the sample tube, completing the sample injection operation. After the injection is complete, the operator slowly and steadily withdraws the injection tube 1 from the sample tube. During the withdrawal process, care must be taken to avoid interfering with or damaging the sample tube and the injected sample. After withdrawing injection tube 1, the injection tool is cleaned and organized, and all components are returned to their original positions to prepare for the next injection operation. At the same time, the injection tool is checked for wear or damage; if necessary, it is repaired or replaced promptly to ensure the performance and accuracy of the injection tool.

[0038] Push rod 3: Made of stainless steel, which has good strength and corrosion resistance, it can withstand a certain amount of pushing force and friction, ensuring that it is not easily deformed or damaged during long-term use. In addition, the stainless steel surface can be polished to reduce friction with the inner wall of the injection tube 1 and improve the smoothness of operation.

[0039] Non-magnetic rod 5: Made of copper alloy material. Copper alloy is non-magnetic, has good electrical and thermal conductivity. When sliding in the groove 4, it will not be affected by the magnetic field. At the same time, it can effectively dissipate heat and reduce the impact of heat generated by friction on the performance of the device.

[0040] Iron rod 6: Made of pure iron, which is easily magnetized and generates a strong magnetic field after magnetization, ensuring that the pad 7 can stably adsorb the sample. At the same time, pure iron is relatively inexpensive, which helps to reduce the manufacturing cost of the device.

[0041] Pad 7: Made of soft magnetic material, such as silicon steel sheet. Silicon steel sheet has high magnetic permeability and low coercivity, allowing it to be quickly magnetized and generate strong magnetic attraction. It also demagnetizes rapidly after the magnetic field is removed, ensuring smooth sample separation. Furthermore, the surface of the silicon steel sheet can be coated to improve its wear resistance and corrosion resistance.

[0042] Positioning ring 8 and annular baffle 2: Positioning ring 8 and annular baffle 2 can be made of aluminum alloy. Aluminum alloy has the advantages of light weight, high strength and corrosion resistance, which can meet the structural strength requirements of the device, while reducing the overall weight of the device and making it easier for operators to handle.

[0043] Magnet ring 9: Neodymium iron boron permanent magnets are selected. Neodymium iron boron permanent magnets have extremely high magnetic energy product and coercivity, which can generate a strong magnetic field to ensure effective magnetization of iron rod 6 and improve the adsorption stability of the sample.

[0044] Based on the common inner diameter of sample tubes, the outer diameter of injection tube 1 is designed to be slightly smaller than the inner diameter of the sample tube by 0.01-0.02 mm. This ensures that injection tube 1 can be smoothly inserted into the sample tube while maintaining a tight fit to reduce shaking. The length of injection tube 1 should be designed according to the actual injection depth requirements, generally 10-20 mm longer than the injection depth of the sample tube, to facilitate handholding and operation by the operator.

[0045] Push rod 3: The length of push rod 3 should be sufficient to completely cover the length of injection tube 1, and the part extending out of injection tube 1 should be easy for the operator to hold and push. Generally, the extension length is 50-100mm.

[0046] Non-magnetic rod 5: The diameter of the non-magnetic rod 5 should be designed according to the size of the slide groove 4, generally 0.05-0.1mm smaller than the inner diameter of the slide groove 4, to ensure that the non-magnetic rod 5 can slide smoothly within the slide groove 4. The length of the non-magnetic rod 5 should be 5-10mm less than the length of the slide groove 4 to provide sufficient space for the compression and extension of the spring.

[0047] Iron rod 6: The diameter of iron rod 6 should be designed according to the installation requirements of pad 7 and positioning ring 8, and generally matches the inner diameter of pad 7 and positioning ring 8. The length of iron rod 6 should ensure that when push rod 3 is pushed to its maximum stroke, pad 7 can reach the designated injection position of sample tube. At the same time, the contact position between positioning ring 8 and annular baffle 2 should be considered. Generally, the length of iron rod 6 extending out of the central hole of annular baffle 2 is 10-20mm.

[0048] Pad 7: The dimensions of pad 7 should be designed according to the shape and size of the sample. Generally, the diameter of pad 7 should be 2-5 mm larger than the diameter of the sample to ensure stable sample adsorption. The thickness of pad 7 should be designed according to the requirements of magnetic adsorption force and the overall structure of the device, and is generally 3-5 mm thick.

[0049] Positioning ring 8 and annular baffle 2: The outer diameter of the positioning ring 8 should be slightly larger than the inner diameter of the annular baffle 2 by 0.1-0.2 mm to ensure that the positioning ring 8 can fit tightly against the annular baffle 2 and play a positioning role. The thickness of the positioning ring 8 and the annular baffle 2 should be designed according to the structural strength requirements of the device, and the thickness is generally 2-3 mm.

[0050] Magnetic ring 9: The inner diameter of magnetic ring 9 should match the outer diameter of push rod 3. The outer diameter should be designed according to the requirements of magnetic adsorption force and the space constraints of the device. Generally, the outer diameter is 5-10mm larger than the diameter of iron rod 6. The thickness of magnetic ring 9 should be designed according to its magnetic properties and the structure of the device. Generally, the thickness is 3-5mm.

[0051] The scheme is further optimized by symmetrically fixing positioning strips to the inner wall of the slide groove 4, and the outer wall of the non-magnetic rod 5 is provided with a slot along the axial direction, and the slot and the positioning strip slide together.

[0052] The design was further optimized so that the diameter of the non-magnetic rod 5 is larger than the diameter of the iron rod 6.

[0053] The design was further optimized so that the diameter of the pad 7 is larger than the inner diameter of the annular baffle 2, and it abuts against the end of the annular baffle 2 away from the injection tube 1.

[0054] The design was further optimized so that the difference between the outer diameter of push rod 3 and the inner diameter of injection tube 1 is 1mm-2mm.

[0055] In a further optimized design, a handle 10 is fixed to the end of the injection tube 1 and the end of the push rod 3, and the push rod 3 passes through the handle 10 at the end of the injection tube 1.

[0056] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0057] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A sample introduction tool for a permanent magnet pulsed measurement instrument, comprising: include: A sample inlet tube (1) is provided, with an annular baffle (2) fixed at one end. The outer diameter of the sample inlet tube (1) matches the inner diameter of the sample tube. Push rod (3), the push rod (3) is slidably connected in the injection tube (1), one end of the push rod (3) extends out of the injection tube (1), and the end of the push rod (3) located in the injection tube (1) is provided with a groove (4) along the axial direction; A non-magnetic rod (5) is slidably connected in the groove (4), and the length of the non-magnetic rod (5) is less than the length of the groove (4). A spring is fixed between the end of the non-magnetic rod (5) and the end of the groove (4). Iron rod (6), the iron rod (6) is coaxially fixed to one end of the non-magnetic rod (5), one end of the iron rod (6) extends out of the central hole of the annular baffle (2) and is fixedly connected to a pad (7), the sample is magnetically attracted to the pad (7); Positioning ring (8), which is coaxially fixed on the iron rod (6), and the positioning ring (8) abuts against the annular baffle (2); A magnet ring (9) is fixed to the end of the push rod (3), and the magnet ring (9) is arranged correspondingly to the iron rod (6).

2. A sample introduction tool for a permanent magnet pulsed measurement instrument according to claim 1, characterized in that: The inner wall of the slide groove (4) is symmetrically fixed with positioning strips, and the outer wall of the non-magnetic rod (5) is provided with a slot along the axial direction, and the slot and the positioning strip are slidably engaged.

3. The sample introduction tool for a permanent magnet pulse measuring instrument according to claim 1, characterized in that: The diameter of the non-magnetic rod (5) is larger than the diameter of the iron rod (6).

4. The sample introduction tool for a permanent magnet pulse measuring instrument according to claim 1, characterized in that: The diameter of the pad (7) is larger than the inner diameter of the annular baffle (2), and it abuts against the end of the annular baffle (2) away from the injection tube (1).

5. The sample introduction tool for a permanent magnet pulse measuring instrument according to claim 1, characterized in that: The difference between the outer diameter of the push rod (3) and the inner diameter of the injection tube (1) is 1mm-2mm.

6. The sample introduction tool for a permanent magnet pulse measuring instrument according to claim 1, characterized in that: The end of the injection tube (1) and the end of the push rod (3) are respectively fixed with a handle (10), and the push rod (3) passes through the handle (10) at the end of the injection tube (1).

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