A magnetostrictive level gauge and its installation method

Abstract

This invention relates to the field of level gauge technology and proposes a magnetostrictive level gauge and its installation method, including a probe, a float, an inner sealing cover, a floating mesh cover, an outer sealing cover, and a linkage mechanism. The float and the floating mesh cover are slidably mounted on the probe. The inner sealing cover is threadedly connected to the float and seals the first counterweight cavity. The outer sealing cover is threadedly connected to the floating mesh cover and seals the second counterweight cavity, and the outer sealing cover and the inner sealing cover are coaxially arranged. The linkage mechanism is used to fix the float and the floating mesh cover, and to fix the outer sealing cover and the inner sealing cover. This invention, by setting up a linkage mechanism, achieves mechanical coupling between the float and the floating mesh cover, and between the inner and outer sealing covers, significantly improving the counterweight adjustment efficiency and reducing operational complexity, making it particularly suitable for industrial scenarios requiring frequent calibration or media switching.

Description

Technical Field

[0001] This invention relates to the field of level gauge technology, and in particular to a magnetostrictive level gauge and its installation method. Background Technology

[0002] Magnetostrictive level gauges, as high-precision level measurement instruments, are widely used in industries such as petroleum, chemical, and water treatment. Their working principle utilizes the interaction between a permanent magnet inside a float and a magnetostrictive waveguide wire inside a probe to determine the liquid level by measuring the time difference between the pulse current and the returning torsional stress wave.

[0003] In practical industrial applications, the media being measured are often complex, potentially containing solid particles, suspended matter, or viscous impurities. These impurities can easily adhere to the surface of the float or jam it, preventing the float from rising and falling freely with the liquid level, thus causing distorted measurement data or even equipment damage. To address these issues, existing technologies typically add a protective mesh cover to the outside of the float, such as the self-calibrating magnetostrictive level gauge and its usage method disclosed in invention patent CN119147079B.

[0004] When measuring media of different densities, it is necessary to adjust the overall density of the float and the mesh cover simultaneously to ensure that they can float normally. When adjusting the density of the float and the mesh cover, the operator must first disassemble the sealing structure on the float and the mesh cover separately, and then add or remove counterweights inside them. This step-by-step operation is cumbersome and inefficient, which is not conducive to improving the counterweight adjustment efficiency of the level gauge. Summary of the Invention

[0005] In view of this, the present invention proposes a magnetostrictive level gauge and its installation method, which uses a linkage mechanism to enable the outer sealing cover and the inner sealing cover to be disassembled synchronously, thereby improving the counterweight adjustment efficiency of the level gauge.

[0006] The technical solution of this invention is implemented as follows: On one hand, this invention provides a magnetostrictive level gauge, including a probe, a float, an inner sealing cover, a floating mesh cover, an outer sealing cover, and a linkage mechanism. The float and the floating mesh cover are both slidably disposed on the probe, the float is located inside the floating mesh cover, and the top sides of the two are respectively provided with a first counterweight cavity and a second counterweight cavity; the inner sealing cover is threadedly connected to the float and seals the first counterweight cavity; the outer sealing cover is threadedly connected to the floating mesh cover and seals the second counterweight cavity, and the outer sealing cover and the inner sealing cover are coaxially disposed; the linkage mechanism is used to fix the float and the floating mesh cover together, and to fix the outer sealing cover and the inner sealing cover together.

[0007] Based on the above technical solutions, preferably, the cross-sections of the float, the inner sealing cover, the floating mesh cover, and the outer sealing cover are all circular; the float is provided with a slot; and the inner sealing cover is provided with a limiting plane on its periphery. The linkage mechanism includes a sliding rod and a rotating rod. The sliding rod is slidably disposed on the floating mesh cover and can engage with the slot; the rotating rod is rotatably disposed on the outer sealing cover and can abut against the limiting plane.

[0008] Based on the above technical solutions, preferably, the sliding rod includes a rod body and a limiting rod. The rod body is slidably disposed on the bottom side of the floating mesh cover and is slidably and rotatably connected to the probe rod. The limiting rod is fixedly disposed on the rod body and is slidably connected to the slot.

[0009] Based on the above technical solutions, preferably, the slide bar further includes a flange and a first spring. The flange is fixedly disposed on the rod body and located below the floating mesh cover; the first spring is abutting between the flange and the floating mesh cover.

[0010] Based on the above technical solutions, preferably, the rotating rod includes an installation section, a connecting section, and a straight section. The installation section is rotatably mounted on the outer sealing cover; the connecting section is integrally formed on the installation section; and the straight section is integrally formed on the connecting section and abuts against the limiting plane.

[0011] Based on the above technical solutions, preferably, the inner sealing cover includes a cover body, a limiting frame, and a second spring. The cover body is connected to the float by a threaded connection. The limiting frame is slidably disposed on the periphery of the cover body, and the straight section can abut against the limiting frame. The second spring is abutted between the cover body and the limiting frame.

[0012] Based on the above technical solutions, preferably, the linkage mechanism further includes a retainer, which is fixedly mounted on the outer sealing cover and engages with the rotating rod.

[0013] Based on the above technical solutions, preferably, the bottom side of the mounting section and the top side of the outer sealing cover are spaced apart. When the straight section abuts against the limiting plane or the limiting frame, the connecting section abuts against the outer sealing cover, and the axis of the straight section is located below the axis of the mounting section.

[0014] Based on the above technical solutions, preferably, multiple floats, inner sealing caps, floating mesh covers, outer sealing caps, and linkage mechanisms are provided, and they correspond one-to-one.

[0015] Secondly, the present invention provides an installation method for a magnetostrictive level gauge, characterized by the following steps: S1, rotating the rotating rod to rotate the straight section to the middle position inside the floating mesh cover; S2, sliding the sliding rod to engage the sliding rod in the slot and pushing the inner sealing cover upward to one side of the straight section; S3, holding the floating mesh cover and the sliding rod with one hand, and applying a unidirectional torque with the other hand to rotate the outer sealing cover, unscrewing the outer sealing cover from the floating mesh cover, and using... S4. The rotating rod abuts against the limiting plane, unscrewing the inner sealing cover from the float; S5. Continue to slide the sliding rod upward, causing the rotating rod to slide against the limiting frame and against the probe; S6. Add or remove counterweights into the first and second counterweight chambers respectively, so that the float and the floating mesh cover are adapted to the medium to be measured; S7. S8. Screw the float and the floating mesh cover onto the inner sealing cover and the outer sealing cover respectively; S9. Rotate the rotating rod to lock it into the holder.

[0016] The magnetostrictive level gauge and its installation method of the present invention have the following advantages over the prior art: (1) By setting up a linkage mechanism, mechanical coupling between the float and the floating mesh cover, and between the inner sealing cover and the outer sealing cover is realized, which significantly improves the efficiency of counterweight adjustment and reduces the complexity of operation. It is particularly suitable for industrial scenarios that require frequent calibration or media switching.

[0017] (2) By setting a limiting frame and a second spring on the cover, the inner sealing cover and the outer sealing cover can be locked with the probe by using the resistance of the rotating rod against the limiting frame, which further improves the convenience of adding or removing counterweights.

[0018] (3) By setting the linkage mechanism to include a slide bar and a rotating bar, the float and the inner sealing cover can slide relative to each other along the probe axis, and the floating mesh cover and the outer sealing cover can slide relative to each other along the probe axis, which effectively compensates for and reduces the impact of pitch machining error on the device, and improves the fault tolerance and assembly accuracy of the device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of a magnetostrictive level gauge according to the present invention.

[0021] Figure 2This is a cross-sectional view of the float in a magnetostrictive level gauge according to the present invention, showing the state in which the rotating rod is engaged in the mounting bracket.

[0022] Figure 3 This is a cross-sectional view of the float in a magnetostrictive level gauge according to the present invention, showing the state in which the rotating rod abuts against the limiting plane.

[0023] Figure 4 This is a perspective view of the float in a magnetostrictive level gauge according to the present invention.

[0024] Figure 5 This is a perspective view of the slot in a magnetostrictive level gauge according to the present invention.

[0025] Figure 6 This is a perspective view of the inner sealing cover in a magnetostrictive level gauge according to the present invention.

[0026] Figure 7 This is a perspective view of a floating mesh cover in a magnetostrictive level gauge according to the present invention.

[0027] Figure 8 This is a perspective view of the bottom side position of the floating mesh cover in a magnetostrictive level gauge according to the present invention.

[0028] Figure 9 This is a perspective view of the slide bar in a magnetostrictive level gauge according to the present invention.

[0029] Figure 10 This is a perspective view of the rotating rod in a magnetostrictive level gauge according to the present invention.

[0030] Figure 11 This is a cross-sectional view of the limiting frame in a magnetostrictive level gauge according to the present invention.

[0031] Figure 12 This is a cross-sectional view of the inner sealing cover in a magnetostrictive level gauge according to the present invention.

[0032] The components are as follows: 1. Probe rod; 2. Float ball; 201. First counterweight cavity; 202. Slot; 3. Inner sealing cover; 31. Cover body; 32. Limiting frame; 33. Second spring; 301. Limiting plane; 4. Floating mesh cover; 401. Second counterweight cavity; 5. Outer sealing cover; 6. Linkage mechanism; 61. Sliding rod; 611. Rod body; 612. Limiting rod; 613. Flanged edge; 614. First spring; 62. Rotating rod; 621. Installation section; 622. Connecting section; 623. Straight section; 63. Slot. Detailed Implementation

[0033] The technical solutions of this invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0034] The present invention provides a magnetostrictive level gauge, comprising a probe 1, a float 2, an inner sealing cover 3, a floating mesh cover 4, an outer sealing cover 5, and a linkage mechanism 6.

[0035] The probe 1 has a magnetostrictive waveguide wire arranged axially inside, and a meter is installed at the top. The meter is responsible for transmitting current pulses, receiving return signals, and calculating the time difference. The float 2 is fitted onto the probe 1 and is slidably connected to it. It contains a permanent magnet. In operation, the float 2 floats freely with the rise and fall of the liquid level. It uses the magnetostrictive effect generated by the interaction between the permanent magnet and the waveguide wire to achieve accurate detection of the liquid level.

[0036] For conditions where the tested medium may contain solid materials or impurities, this device is equipped with a floating mesh cover 4 to provide protection. For example... Figure 1 As shown, the floating mesh cover 4 has a hemispherical structure and is slidably fitted onto the outside of the probe 1, allowing it to float freely up and down in sync with the liquid level. During liquid level detection, the float 2 is located inside the floating mesh cover 4, and the two do not contact each other, thus creating a physical isolation barrier that effectively prevents solid materials or impurities from directly colliding with the float 2, significantly improving the operational reliability and service life of the device in complex media environments.

[0037] like Figure 4 and Figure 7 As shown, to adapt to the measurement requirements of media with different densities, the top sides of the float 2 and the floating mesh cover 4 are respectively provided with a first counterweight cavity 201 and a second counterweight cavity 401. The inner sealing cover 3 is tightly connected and fixed to the top of the float 2 by a threaded connection, sealing the first counterweight cavity 201; the outer sealing cover 5 is connected and fixed to the top of the floating mesh cover 4 by a threaded connection, sealing the second counterweight cavity 401. When it is necessary to adjust the buoyancy characteristics to match the media, simply unscrew the inner sealing cover 3 and the outer sealing cover 5 to expose the first counterweight cavity 201 and the second counterweight cavity 401. By adding or removing counterweights into the first counterweight cavity 201 and the second counterweight cavity 401, the overall specific gravity of the float 2 and the floating mesh cover 4 can be adjusted to ensure that the device can maintain the best suspension state and measurement accuracy in the media to be measured with various densities.

[0038] To adapt to the liquid level detection requirements of media with different densities, the overall specific gravity of the float 2 and the floating mesh cover 4 needs to be adjusted simultaneously, that is, by adding or removing counterweights into the first counterweight chamber 201 and the second counterweight chamber 401 inside them respectively. In the traditional solution, the operator must disassemble the inner sealing cover 3 and the outer sealing cover 5 in sequence, which is a cumbersome and time-consuming operation.

[0039] This invention arranges the inner sealing cover 3 and the outer sealing cover 5 coaxially and achieves mechanical coupling through a linkage mechanism 6. Specifically, before disassembly, the float 2 is temporarily rigidly fixed to the floating mesh cover 4 through the linkage mechanism 6, and the outer sealing cover 5 is temporarily rigidly fixed to the inner sealing cover 3. Thus, the operator only needs to apply a single rotational force to the outer sealing cover 5, which will simultaneously drive the inner sealing cover 3 to loosen and remove it through the linkage mechanism 6. This design significantly improves the efficiency of counterweight adjustment operations and reduces operational complexity, making it particularly suitable for industrial applications with frequent on-site calibration or media switching.

[0040] To reduce the dynamic impact of medium fluctuations on the components of the device, the cross-sections of the float 2, inner sealing cover 3, floating mesh cover 4, and outer sealing cover 5 are all optimized to be circular. This ensures that each component maintains an axisymmetric stress state under liquid level changes and fluid disturbances, thereby effectively suppressing swaying, jamming, and resonant vibrations, and improving the smoothness of the overall movement and the stability of liquid level detection.

[0041] The float 2 has a slot 202, and the inner sealing cover 3 has a limiting plane 301 on its periphery. The linkage mechanism 6 includes a slide rod 61, a rotating rod 62, and a retainer 63. The slide rod 61 is slidably mounted on the floating mesh cover 4, the rotating rod 62 is rotatably mounted on the outer sealing cover 5, and the retainer 63 is fixedly mounted on the outer sealing cover 5. When it is necessary to disassemble the outer sealing cover 5 and the inner sealing cover 3, first slide the slide rod 61 into the slot 202 to fix the floating mesh cover 4 and the float 2 relative to each other in the rotation direction. Then rotate the rotating rod 62 so that the rotating rod 62 abuts against the limiting plane 301, thereby rigidly fixing the inner sealing cover 3 and the outer sealing cover 5 in the rotation direction. After the counterweight is added or removed, and the inner sealing cover 3 and the outer sealing cover 5 are installed on the float 2 and the floating mesh cover 4 respectively, rotate the rotating rod 62 so that the rotating rod 62 is engaged with the retainer 63 to limit the free swing of the rotating rod 62 under liquid surface fluctuations or equipment vibrations.

[0042] like Figure 2 and Figure 9As shown, the slide bar 61 includes a rod body 611, a limiting rod 612, a flange 613, and a first spring 614. The rod body 611 is slidably disposed on the bottom side of the floating mesh cover 4 and is slidably and rotatably connected to the probe rod 1. The limiting rod 612 is fixedly disposed on the rod body 611. The cross-section of the limiting rod 612 is the same as the cross-section of the slot 202, and both are non-circular, preferably regular hexagonal, etc., thereby realizing the snap-fit ​​and sliding connection between the limiting rod 612 and the slot 202, and thus realizing the fixed connection between the float 2 and the floating mesh cover 4 in the rotation direction.

[0043] The flange 613 is fixedly mounted on the rod body 611 and located below the floating mesh cover 4. The first spring 614 is abutted between the flange 613 and the floating mesh cover 4. The limiting rod 612 can automatically reset under the elastic force of the first spring 614, which not only simplifies the operation process, but also improves the installation efficiency and maintenance convenience of the level gauge.

[0044] like Figure 10 As shown, the rotating rod 62 includes an installation section 621, a connecting section 622, and a straight section 623. The installation section 621 is rotatably mounted on the outer sealing cover 5, the connecting section 622 is integrally formed on the installation section 621, and the straight section 623 is integrally formed on the connecting section 622. During the detection state, the rotation of the installation section 621 moves the straight section 623 to a position that fits against the surface of the outer sealing cover 5 and engages with the retainer 63 to maintain a compact structure. When disassembling the inner sealing cover 3 and the outer sealing cover 5, the rotation of the installation section 621 moves the straight section 623 to the middle position of the outer sealing cover 5 and abuts against the limiting plane 301, thereby achieving rigid fixation of the outer sealing cover 5 and the inner sealing cover 3 in the rotation direction and realizing torque transmission.

[0045] The sliding rod 61 rigidly connects the floating mesh cover 4 and the float 2 in the rotational direction, while in the axial direction of the probe rod 1, the floating mesh cover 4 and the float 2 are slidably connected. Similarly, the rotating rod 62 rigidly connects the outer sealing cover 5 and the inner sealing cover 3 in the rotational direction, while in the axial direction of the probe rod 1, the outer sealing cover 5 and the inner sealing cover 3 are also slidably connected. Thus, even if there is a difference between the thread pitch of the floating mesh cover 4 and the outer sealing cover 5 and the thread pitch of the float 2 and the inner sealing cover 3, the synchronous rotation of the outer sealing cover 5 and the inner sealing cover 3 can still be achieved by using the above sliding fit structure, effectively compensating for and reducing the impact of machining errors on the device, and improving the fault tolerance and assembly accuracy of the device.

[0046] Both the first counterweight chamber 201 and the second counterweight chamber 401 are annular groove structures. When adding or removing counterweights, especially when adding or removing liquid counterweights, the openings of the first counterweight chamber 201 and the second counterweight chamber 401 should be kept facing upwards. However, the inner sealing cover 3 and the outer sealing cover 5 are located above the float 2 and the floating mesh cover 4. If the device is kept vertical, the disassembled inner sealing cover 3 and outer sealing cover 5 will naturally slide down under gravity, easily obstructing the first counterweight chamber 201 and the second counterweight chamber 401, causing inconvenience to the operation of adding or removing counterweights.

[0047] Therefore, the structure of the inner sealing cover 3 was improved, such as... Figure 6 and Figure 11 As shown, the inner sealing cover 3 includes a cover body 31, a limiting frame 32, and a second spring 33. The cover body 31 is threadedly connected to the float 2. The limiting frame 32 is slidably disposed on the periphery of the cover body 31 and passes through the cover body 31. The second spring 33 is abutted between the cover body 31 and the limiting frame 32. The limiting frame 32 is preferably made of an elastically deformable material. In its natural state, the limiting frame 32 moves away from the probe 1 under the elastic force of the second spring 33. When the cover body 31 is slid so that the straight section 623 abuts against the limiting frame 32, the limiting frame 32 slides and abuts against the probe 1, thereby achieving a fixed connection between the inner sealing cover 3, the outer sealing cover 5, and the probe 1. When the device is placed vertically, the inner sealing cover 3 and the outer sealing cover 5 will not slip off, thus facilitating the addition or removal of counterweights into the first counterweight cavity 201 and the second counterweight cavity 401.

[0048] like Figure 3 , Figure 10 and Figure 12 As shown, the bottom side of the mounting section 621 is spaced apart from the top side of the outer sealing cover 5, meaning the mounting section 621 is raised a certain distance. When the straight section 623 abuts against the limiting plane 301 or the limiting frame 32, the connecting section 622 abuts against the inner ring position of the top side of the outer sealing cover 5. The axis of the straight section 623 is located below the axis of the mounting section 621, meaning the end of the rotating rod 62 near the probe 1 is tilted downwards. In this state, the abutment effect between the rotating rod 62 and the inner sealing cover 3 is better, forming a self-locking effect, preventing the two from separating during rotation, and ensuring the stability of the linkage operation.

[0049] Multiple floats 2, inner sealing caps 3, floating mesh covers 4, outer sealing caps 5, and linkage mechanisms 6 are preferably provided, and each corresponds to one another. For example... Figure 1 As shown, two floats 2, two inner sealing covers 3, two floating mesh covers 4, two outer sealing covers 5, and two linkage mechanisms 6 are provided. By adjusting their density, two media of different densities can be detected simultaneously, which enriches the functional dimensions of the device and enables it to undertake more complex oil-water interface or multi-layer media measurement tasks, thus expanding its application fields.

[0050] The installation method of a magnetostrictive level gauge according to the present invention is as follows: S1, rotate the rotating rod 62 to rotate the straight section 623 to the middle position inside the floating mesh cover 4; at this time, the straight section 623 is in the waiting position, preparing to establish rigid contact with the limiting plane 301 of the inner sealing cover 3.

[0051] S2, slide the slide rod 61 along the axis of the probe rod 1, so that the slide rod 61 is engaged in the slot 202, and push the inner sealing cover 3 upward to one side of the straight section 623, so as to achieve the positioning and rigid locking of the floating mesh cover 4 and the float 2 in the rotation direction.

[0052] S3, hold the floating mesh cover 4 and the slide bar 61 with one hand, and apply unidirectional torque to rotate the outer sealing cover 5 with the other hand. Through the mechanical coupling of the linkage mechanism 6, the rotation of the outer sealing cover 5 synchronously drives the inner sealing cover 3 to rotate, thereby realizing the integrated disassembly action of the outer sealing cover 5 being loosened and removed from the floating mesh cover 4 and the inner sealing cover 3 being loosened and removed from the float ball 2.

[0053] S4, continue to slide the slide bar 61 upwards, so that the rotating rod 62 abuts against the limiting frame 32 and slides radially along the cover 31, and abuts against the periphery of the probe 1, to ensure that when the device is installed vertically, the outer sealing cover 5 and the inner sealing cover 3 will not slide down due to gravity and block the first counterweight cavity 201 and the second counterweight cavity 401.

[0054] S5, add or remove counterweights into the first counterweight cavity 201 and the second counterweight cavity 401 respectively, adjust the density of the float 2 and the floating net 4, and make the float 2 and the floating net 4 adapt to the medium to be measured.

[0055] S6, screw the float 2 and the floating mesh cover 4 onto the inner sealing cover 3 and the outer sealing cover 5 respectively to seal the first counterweight cavity 201 and the second counterweight cavity 401, providing a sealed space for the counterweight and preventing the medium from seeping into the first counterweight cavity 201 and the second counterweight cavity 401 and affecting the counterweight.

[0056] S7. Rotate the rotating rod 62 to engage it in the mounting bracket 63, and install the level gauge on the container storing the medium to be measured to detect the liquid level of the medium.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A magnetostrictive level gauge, characterized in that: The device includes a probe (1), a float (2), an inner sealing cover (3), a floating mesh cover (4), an outer sealing cover (5), and a linkage mechanism (6). The float (2) and the floating mesh cover (4) are slidably mounted on the probe (1). The float (2) is located inside the floating mesh cover (4), and the top sides of the two are respectively provided with a first counterweight cavity (201) and a second counterweight cavity (401). The inner sealing cover (3) is threadedly connected to the float (2) and seals the first counterweight cavity (201). The outer sealing cover (5) is threadedly connected to the floating mesh cover (4) and seals the second counterweight cavity (401). The outer sealing cover (5) and the inner sealing cover (3) are coaxially arranged. The linkage mechanism (6) is used to fix the float (2) to the floating mesh cover (4) and to fix the outer sealing cover (5) to the inner sealing cover (3). The float (2), the inner sealing cover (3), the floating mesh cover (4), and the outer sealing cover (5) are all circular in cross-section. The float (2) is provided with a slot (202), and the inner sealing cover (3) is provided with a limiting plane (301) on its periphery. The linkage mechanism (6) includes a sliding rod (61) and a rotating rod (62). The sliding rod (61) is slidably disposed on the floating mesh cover (4) and can engage with the slot (202). The rotating rod (62) is rotatably disposed on the outer sealing cover (5) and can abut against the limiting plane (301). The slide bar (61) includes a rod body (611) and a limiting rod (612). The rod body (611) is slidably disposed on the bottom side of the floating mesh cover (4) and is slidably and rotatably connected to the probe (1). The limiting rod (612) is fixedly disposed on the rod body (611) and is slidably connected to the slot (202). The slide bar (61) also includes a flange (613) and a first spring (614). The flange (613) is fixedly disposed on the rod body (611) and located below the floating mesh cover (4). The first spring (614) is abutted between the flange (613) and the floating mesh cover (4). The rotating rod (62) includes an installation section (621), a connecting section (622), and a straight section (623). The installation section (621) is rotatably mounted on the outer sealing cover (5). The connecting section (622) is integrally formed on the installation section (621). The straight section (623) is integrally formed on the connecting section (622) and abuts against the limiting plane (301). The inner sealing cover (3) includes a cover body (31), a limiting frame (32), and a second spring (33). The cover body (31) is connected to the float (2) by a threaded connection. The limiting frame (32) is slidably disposed on the periphery of the cover body (31) and passes through the cover body (31). The straight section (623) can abut against the limiting frame (32). When the cover body (31) is slid so that the straight section (623) abuts against the limiting frame (32), the limiting frame (32) slides and abuts against the probe (1), thereby realizing the fixed connection between the inner sealing cover (3), the outer sealing cover (5), and the probe (1). The second spring (33) is abutted between the cover body (31) and the limiting frame (32).

2. The magnetostrictive level gauge as described in claim 1, characterized in that: The linkage mechanism (6) also includes a retainer (63), which is fixedly mounted on the outer sealing cover (5) and engaged with the rotating rod (62).

3. The magnetostrictive level gauge as described in claim 2, characterized in that: The bottom side of the mounting section (621) is spaced apart from the top side of the outer sealing cover (5). When the straight section (623) abuts against the limiting plane (301) or the limiting frame (32), the connecting section (622) abuts against the outer sealing cover (5), and the axis of the straight section (623) is located below the axis of the mounting section (621).

4. The magnetostrictive level gauge as described in claim 1, characterized in that: Multiple floats (2), inner sealing caps (3), floating mesh covers (4), outer sealing caps (5), and linkage mechanisms (6) are provided, and they correspond one to one.

5. A method for installing a magnetostrictive level gauge as described in claim 3, characterized in that, Includes the following steps: S1, rotate the rotating rod (62) to rotate the straight section (623) to the middle position inside the floating net cover (4); S2, slide the slide bar (61) so that the slide bar (61) is engaged in the slot (202) and push the inner sealing cover (3) upward to one side of the straight section (623); S3, hold the floating mesh cover (4) and the slide bar (61) with one hand, apply unidirectional torque with the other hand to rotate the outer sealing cover (5), unscrew the outer sealing cover (5) from the floating mesh cover (4), and use the abutment of the rotating rod (62) and the limiting plane (301) to unscrew the inner sealing cover (3) from the float (2); S4, continue to slide the slide bar (61) upwards, so that the rotating rod (62) slides against the limiting frame (32) and against the probe (1). S5, add or remove counterweights into the first counterweight cavity (201) and the second counterweight cavity (401) respectively, so that the float (2) and the floating net (4) are adapted to the medium to be measured; S6, screw the float (2) and the floating mesh cover (4) onto the inner sealing cover (3) and the outer sealing cover (5) respectively; S7, rotate the rotating rod (62) to engage the rotating rod (62) into the card holder (63).

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