Impedance spectrum sensor connecting mechanism and liquid level detection system

Abstract

The utility model discloses an impedance spectroscopy sensor connecting mechanism and a liquid level detection system, and belongs to the field of liquid level detection devices. The liquid level detection system includes a liquid container and an impedance spectroscopy sensor connection mechanism. The impedance spectroscopy sensor connection mechanism includes a sensor body and a joint assembly. The sensor body is provided with a first section and a second section which are connected with each other, and the outer diameter of the first section is larger than that of the second section, so that a first step is formed at the joint of the first section and the second section; a cable is arranged at one end of the first section away from the second section; the connector assembly comprises a connector and a limiting piece. A through hole is formed in the connector, the end, away from the first section, of the second section penetrates out of the through hole, the first step is rotationally clamped with the hole wall of the through hole, and the limiting piece is detachably connected with the end, penetrating out of the through hole, of the second section so as to limit the second section to retreat from the through hole. When the connector is screwed into the interface, an operator can hold the sensor body, so that the sensor body is prevented from rotating along with the rotation of the connector, and a cable is further prevented from rotating along with the connector.

Description

Technical Field

[0001] The present application relates to the technical field of liquid level detection devices, and in particular to an impedance spectrum sensor connection mechanism and a liquid level detection system. Background Art

[0002] The impedance spectrum sensor is a sensor used to detect material level. Its sensing principle is to use a frequency sweep method to emit an electric field signal at the sensing end. Since different characteristic media will produce frequency spectra with different resonant characteristics, it is used to determine whether the sensor is covered by material and output a switch signal.

[0003] At present, the impedance spectrum sensor is installed in a liquid container in the following way: the interface of the liquid container is set as a threaded port, and the connecting end of the impedance spectrum sensor is inserted into the interface and threadedly connected with the interface.

[0004] However, during the installation process, the cable of the impedance spectrum sensor will rotate along with the rotation of the connection end, causing the cable to become tangled, which is very inconvenient and unsightly. Utility Model Content

[0005] Based on the above-mentioned deficiencies, the present application provides a connection mechanism and a liquid level detection system to improve the problem of cable twisting during installation of an impedance spectrum sensor in the related art.

[0006] This application is implemented as follows:

[0007] In the first aspect, the example of the present application provides an impedance spectrum sensor connection mechanism, including a sensor body and a connector assembly. The sensor body has a first section and a second section connected to each other, the outer diameter of the first section is larger than the outer diameter of the second section, so as to form a first step at the connection between the first section and the second section; a cable is provided at one end of the first section away from the second section; the connector assembly includes a connector and a limiter; the outer wall of the connector is provided with a first external thread for threaded connection with the interface of the liquid container; the interior of the connector has a through hole, the end of the second section away from the first section passes through the through hole, the first step is rotatably engaged with the hole wall of the through hole, and the limiter is detachably connected to one end of the second section passing through the through hole to limit the second section from exiting the through hole.

[0008] In the above implementation process, the sensing body of the impedance spectrum sensor is inserted into the through hole in the connector, and the sensor body can rotate in the through hole. Therefore, when the connector is tightened to the interface of the liquid container, the sensor body will not rotate with the rotation of the connector, thereby reducing the probability of the cable connected to the first section rotating.

[0009] Since a first step is formed at the connection between the first section and the second section of the sensor body, when the second section passes through the through hole, the first step can be clamped with the hole wall of the through hole, and a limiting member is provided at one end of the second section extending out of the through hole. The limiting member and the first step are respectively rotatably clamped with the hole walls at both ends of the through hole, so as to limit the movement of the sensor body in the joint, thereby realizing the connection between the sensing body and the joint.

[0010] Combined with the first aspect, in an optional implementation manner, along the axial direction of the through hole, the through hole includes a first hole section and a second hole section connected to each other. The diameter of the first hole section is larger than that of the second hole section, so as to form a second step at the connection between the inner wall of the joint corresponding to the first hole section and the second hole section; the second section passes through the first hole section and extends out of the second hole section, and the first step is rotatably clamped with the second step.

[0011] In the above implementation process, by setting the through hole as the first hole section and the second hole section with different hole diameters, a second step can be formed at the positions of the inner wall of the joint corresponding to the first hole section and the second hole section. The second section of the sensor body can pass through the first hole section and the second hole section in sequence and then extend out of the second hole section, and one end of the first section close to the second section extends into the first hole section, so that the first step of the sensor body can be clamped with the second step at the inner wall of the joint, restricting the sensor body from passing out of the joint. By using the cooperation between the first step and the second step, and the cooperation between the limiting member and the outer wall of the second hole section, the movement of the sensor body in the joint along its axial direction can be restricted, realizing the connection between the sensor body and the joint.

[0012] Combined with the first aspect, in an optional implementation manner, when the limiting member is connected to the second section, the limiting member and the first section respectively abut against the end walls of the joint corresponding to both ends of the second hole section.

[0013] In the above implementation process, when the limiting member is connected to the second section, the limiting member and the first section respectively abut against the end walls of the joint corresponding to both ends of the second hole section, which can further reduce the probability of the sensor body moving in the joint, improve the structural stability of the impedance spectrum sensor connection mechanism, and thus improve the accuracy of liquid level sensing.

[0014] Combined with the first aspect, in an optional implementation manner, the second section is provided with a second external thread, and the limiting member includes a nut, and the outer diameter of the nut is larger than the inner diameter of the second hole section.

[0015] In the above implementation process, a second external thread is provided on the second section of the sensor body. After passing the second section through the through-hole of the joint, the nut can be tightened on one end of the second section passing through the through-hole. Since the outer diameter of the nut is larger than the inner diameter of the through-hole, the nut will abut against the inner wall of the through-hole, thereby being able to limit the movement of the sensor body within the joint, improve the structural stability of the impedance spectrum sensor connection mechanism, and further improve the accuracy of liquid level sensing. Moreover, by using the threaded connection between the nut and the second section, the connection method is simple.

[0016] In combination with the first aspect, in an optional implementation manner, the limiting member further includes a set screw. The set screw extends into the nut from one side in the radial direction of the nut and abuts against the second section.

[0017] In the above implementation process, the set screw is inserted into the nut from one side in the radial direction of the nut. The set screw can abut against the second section within the nut, be able to limit the relative rotation of the nut with respect to the second section, improve the connection stability between the nut and the second section, and further improve the structural stability of the impedance spectrum sensor connection mechanism.

[0018] In combination with the first aspect, in an optional implementation manner, a first sealing ring is provided on the inner wall of the joint corresponding to the end of the first hole section far from the second hole section. The first sealing ring is rotatably and sealingly connected to the first section.

[0019] In the above implementation process, a first sealing ring is provided at the end of the joint corresponding to the first hole section far from the second hole section. The first sealing ring can be rotatably and sealingly connected to the first section of the sensor body extending into the first hole section, be able to reduce the probability of fluid passing through the gap between the outer wall of the second section of the sensor body and the inner wall of the joint corresponding to the first hole section, and further be able to improve the sealing performance of the impedance spectrum sensor connection mechanism connecting to the interface of the liquid container.

[0020] In combination with the first aspect, in an optional implementation manner, a second sealing ring is provided on the outer wall of the joint. The second sealing ring is used for sealing connection with the interface of the liquid container.

[0021] In the above implementation process, a second sealing ring is provided at the outer wall of the joint. When connecting the joint to the interface of the liquid container, it can reduce the probability of fluid flowing through the gap between the outer wall of the joint and the inner wall of the interface, and can further improve the sealing performance of the impedance spectrum sensor connection mechanism connecting to the interface of the liquid container.

[0022] In combination with the first aspect, in an optional implementation manner, a cylindrical handle is convexly provided on the outer wall of the joint near the cable end. The first external thread is provided on the side of the handle facing the second section.

[0023] In combination with the first aspect, in an optional implementation manner, a plurality of protruding anti-slip strips are spaced apart on the circumferential outer wall of the handle.

[0024] In the above implementation process, a cylindrical handle is provided at one end of the joint close to the cable, and a plurality of protruding anti-slip strips are arranged at intervals on the circumferential outer wall of the handle. An operator can hold the handle and rotate the joint, and then screw the joint into the interface of the liquid container.

[0025] In a second aspect, an example of the present application provides a liquid level detection system, including a liquid container and the impedance spectrum sensor connection mechanism provided in the first aspect. The liquid container is provided with an interface, and an internal thread is provided in the interface. The joint in the impedance spectrum sensor connection mechanism is threadedly connected to the interface, so that one end of the sensor body away from the first section extends into the liquid container.

[0026] In the above implementation process, for the liquid level detection system provided by the example of the present application, the impedance spectrum sensor connection mechanism can be screwed into the interface of the liquid container, so that one end of the sensor body away from the first section extends into the liquid container for liquid level sensing. And, since the sensing body of the impedance spectrum sensor passes through the through hole in the joint and is rotatably clamped with the joint, when the joint is rotated and screwed into the interface of the liquid container, the operator can hold the sensor body to avoid the sensor body from rotating along, and further can avoid the cable connected to the sensor body from rotating along, which can reduce the probability of the cable being twisted or even broken due to rotation along, and can improve the stability of the liquid level detection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.

[0028] Figure 1 It is a schematic structural diagram of the liquid level detection system provided by the example of the present application;

[0029] Figure 2 It is a schematic structural diagram of the impedance spectrum sensor connection mechanism provided by the example of the present application;

[0030] Figure 3 It is a schematic cross-sectional view of the impedance spectrum sensor connection mechanism provided by the example of the present application;

[0031] Figure 4 It is a schematic plan view of the sensor body provided by the example of the present application;

[0032] Figure 5 It is a schematic cross-sectional view of the joint provided by the example of the present application.

[0033] Icons: 1000 - Liquid level detection system; 1 - Impedance spectroscopy sensor connection mechanism; 10 - Sensor body; 11 - First section; 12 - Second section; 13 - Cable; 14 - First step; 20 - Connector assembly; 21 - Connector; 22 - Through hole; 221 - First hole section; 222 - Second hole section; 223 - Second step; 23 - Limiting part; 231 - Nut; 232 - Set screw; 24 - First sealing ring; 25 - Second sealing ring; 26 - Handle; 27 - Anti-slip strip; 2 - Liquid container; 201 - Interface. Detailed implementation manners

[0034] Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and the above accompanying drawings description are intended to cover non-exclusive inclusion.

[0036] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality of" means more than two unless otherwise specifically defined.

[0037] Referring to "embodiments" herein means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0038] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application.

[0039] The impedance spectrum sensor is a sensor used to detect the liquid level of materials. Its sensing principle is to emit an electric field signal at the sensing end in a swept-frequency manner. Since different characteristic media will generate spectra with different resonance characteristics, it is thus determined whether the sensor is covered by the material and a switching signal is output.

[0040] Generally, the impedance spectrum sensor includes a sensor body 10 and a display (not shown in the figure). The sensor body 10 and the display are connected by a cable 13. For the connection schematic diagram of the sensor body 10 and the cable 13, please refer to Figure 4 .

[0041] For the convenience of installation, a second external thread is usually provided on the outer wall of the sensor body 10, which meshes with the internal thread of the interface 201 to connect the sensor body 10 inside the interface 201.

[0042] However, during the installation process, when the sensor body 10 needs to be rotated and screwed into the interface 201, the cable 13 connected to the sensor body 10 will rotate along with the rotation of the sensor body 10, and then problems such as the cable 13 being twisted or even broken will occur, which is very inconvenient and not aesthetically pleasing.

[0043] Therefore, the present application provides an impedance spectrum sensor connection mechanism 1 and a liquid level detection system 1000, which can, to a certain extent, improve the problem of the cable 13 rotating along when connecting the sensor body 10. To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

[0044] Please refer to Figure 1 , the liquid level detection system 1000 provided by the exemplary embodiment of the present application includes an impedance spectrum sensor connection mechanism 1 and a liquid container 2. The impedance spectrum sensor connection mechanism 1 is connected to the interface 201 of the liquid container 2.

[0045] Among them, please refer to Figure 2 and Figure 3 , the impedance spectrum sensor connection mechanism 1 includes a sensor body 10 and a joint assembly 20.

[0046] Among them, please continue to refer to Figure 4 , the sensor body 10 has a first section 11 and a second section 12 connected to each other. The outer diameter of the first section 11 is greater than the outer diameter of the second section 12 to form a first step 14 at the connection between the first section 11 and the second section; one end of the first section 11 away from the second section 12 is provided with a cable 13.

[0047] Among them, please combine Figure 3 and Figure 5, the joint assembly 20 includes a joint 21 and a limiting member 23; the interior of the joint 21 has a through hole 22. The outer wall of the joint 21 is provided with a first external thread for threaded connection with the interface 201 of the liquid container 2.

[0048] Please refer to Figure 3 and Figure 4 , one end of the second section 12 departing from the first section 11 passes through the through hole 22, and the first step 14 is rotatably clamped with the hole wall of the through hole 22. The limiting member 23 is detachably connected to the end of the second section 12 passing through the through hole 22 to limit the second section 12 from withdrawing upward from the through hole.

[0049] When performing liquid level detection using the liquid level detection system 1000 provided by the example of the present application, the second section 12 of the sensor body 10 can be passed through the through hole 22 in the joint 21. Since the outer diameter of the first section 11 of the sensor body 10 is greater than the outer diameter of the second section 12, a first step 14 will be formed at the connection between the first section 11 and the second section 12. Therefore, when the second section 12 is passed through the through hole 22 in the joint 21, the first step 14 will abut against the hole wall at the top of the through hole 22, thereby being able to limit the sensor body 10 from falling downward along the through hole 22.

[0050] Then, a limiting member 23 is installed at the end of the second section 12 passing through the through hole 22, and the clamping of the limiting member 23 with the hole wall of the through hole 22 is used to limit the second section 12 from withdrawing upward from the through hole 22. Therefore, by using the first step 14 and the limiting member 23 to rotatably clamp with the hole walls at both ends of the through hole 22, the sensor body 10 can be rotatably fixed in the joint 21.

[0051] Finally, screw the joint 21 into the interface 201 of the liquid container 2. When rotating the joint 21, the operator can hold the sensor body 10 to avoid the sensor body 10 rotating along with the rotation of the joint 21, thereby being able to avoid the problem of the cable 13 being twisted due to following rotation.

[0052] The present application does not limit how the first step 14 rotatably clamps with the hole wall of the through hole 22. In a possible embodiment, the through hole 22 can be set as a straight hole with a consistent aperture. The aperture of the through hole 22 is greater than the outer diameter of the second section 12 and less than the outer diameter of the first section 11. Therefore, the second section 12 can penetrate into the through hole 22, and the first step 14 can be clamped with the top end of the through hole 22 to limit the first section 11 from penetrating downward into the through hole 22, thereby being able to avoid the sensor body from sliding downward into the liquid container 2 through the through hole 22, and further being able to improve the stability of the liquid level detection system 1000.

[0053] Alternatively, in some other possible embodiments, please refer to Figure 5, along the axial direction of the through hole 22, the through hole 22 includes a first hole section 221 and a second hole section 222 that are connected to each other. The diameter of the first hole section 221 is larger than that of the second hole section 222, so as to form a second step 223 on the inner wall of the joint 21 corresponding to the connection between the first hole section 221 and the second hole section 222.

[0054] When installing the sensor body 10 on the joint 21, the second section 12 can be sequentially passed through the first hole section 221 and the second hole section 222 and extend out of the second hole section 222. At this time, the first section 11 can extend into the first hole section 221, so that the first step 14 can be rotatably clamped with the second step 223.

[0055] The limiting member 23 is arranged at one end of the second section 12 passing through the through hole 22, and is used to cooperate with the first step 14 to rotatably fix the sensor body 10 in the joint 21 together.

[0056] This application does not limit how the limiting member 23 restricts the sensor body 10 from passing downward out of the through hole 22. In some possible embodiments, one end of the limiting member 23 is detachably fixedly connected to one end of the second section 12 passing through the through hole 22, and the other end is rotatably connected to the joint 21.

[0057] Exemplarily, the limiting member 23 may include a rotating bearing. The outer ring of the rotating bearing is fixedly connected to the inner wall of the joint 21 near the end of the through hole 22. The inner ring of the rotating bearing is provided with an internal thread. The inner ring of the rotating bearing is threadedly connected to one end of the second section 12 of the sensor body 10 extending out of the through hole 22, and the inner ring and the outer ring of the rotating bearing are rotatably connected. When connecting the second section 12 to the rotating bearing, keep the second section 12 stationary and realize the connection between the second section 12 and the bearing by rotating the inner ring of the rotating bearing.

[0058] Alternatively, in order to facilitate the disassembly and assembly of the limiting member 23 and the second section 12, in some other possible embodiments, please continue to refer to Figure 2 and Figure 3 , the limiting member 23 includes a nut 231. The outer diameter of the nut is larger than the inner diameter of the second hole section 222.

[0059] After the second section 12 of the sensor body 10 passes through the second hole section 222, the nut 231 can be sleeved outside the second section 12, and then the nut 231 is rotated and the nut 231 is rotated along the thread of the second section 12 to the end of the bottom of the second hole section 222. Since the outer diameter of the nut 231 is larger than the inner diameter of the second hole section 222, the nut 231 fixed to the second section will not enter the second hole section 222, and thus the second section 12 extending out of the second hole section 222 can be restricted from retracting upward into the through hole 22, and thus the limitation of the sensor body 10 can be realized.

[0060] Further, to avoid the nut 231 fixed to the second section 12 from rotating as the joint 21 rotates, thereby increasing the probability of the nut 231 detaching from the second section 12, in some possible embodiments, insertion holes may be provided on the outer wall of the nut 231 in the circumferential direction. The limiting member 23 is further provided with a locking set screw 232, and the locking set screw 232 can be inserted into the nut 231 through the insertion hole and abutted against the second section 12. Since the locking set screw 232 abuts against the second section 12, the locking set screw 232 can limit the rotation of the nut 231.

[0061] Generally, the liquid container 2 needs to be gas-isolated from the external environment to prevent the liquid substance in the liquid container 2 from volatilizing outside the liquid container 2 or to prevent the gas in the external environment from entering the liquid container 2 and affecting the stability of the liquid substance.

[0062] Further, to reduce the flow of the liquid substance or the gas substance through the gap between the outer wall of the first section 11 and the inner wall of the joint 21 corresponding to the first hole section 221, in one possible embodiment, please continue to refer to Figure 3 , a first sealing ring 24 is provided on the inner wall of the joint 21 corresponding to the end of the first hole section 221 far from the second hole section 222, and the first sealing ring 24 is rotatably and sealingly connected to the first section 11.

[0063] Further, the present application does not limit how the first sealing ring 24 is rotatably and sealingly connected to the first section 11. In some possible embodiments, the first sealing ring 24 may be a sealed bearing structure. The outer ring of the sealed bearing is fixedly and sealingly connected to the inner wall of the first hole section 221, and the inner ring of the sealed bearing is sealingly connected to the outer wall of the first section 11 of the sensor body 10, and the outer ring and the inner ring of the sealed bearing can rotate relative to each other. Therefore, when the sensor body 10 is inserted into the through hole 22 and the first section 11 is sealingly connected to the inner ring of the sealed bearing, even if the joint 21 is rotated, the outer ring of the sealed bearing will rotate, while the inner ring of the sealed bearing will not rotate, thereby being able to keep the sensor body 10 stationary when the joint 21 is screwed into the interface 201.

[0064] Further, to reduce the flow of the liquid substance or the gas substance through the gap between the outer wall of the joint 21 and the inner wall of the interface 201, in one possible embodiment, please continue to refer to Figure 2 , a second sealing ring 25 may be provided on the outer wall of the joint 21.

[0065] When the joint 21 is screwed into the interface 201, the second sealing ring 25 is sealingly connected to the inner wall of the interface 201.

[0066] Exemplarily, the second sealing ring 25 may be a rubber ring.

[0067] Further, to facilitate the operator to screw the joint 21 into the interface 201, in a possible embodiment, please continue to refer to Figure 2 , a cylindrical handle 26 is protrudingly provided on the outer wall of one end of the joint 21 close to the cable 13, and the first external thread is provided on the side of the handle 26 facing the second section 12.

[0068] Further, a plurality of protruding anti-slip strips 27 can be provided at intervals on the outer circumferential wall of the handle 26.

[0069] The present application does not limit the specific structure of the liquid container 2. The liquid container 2 has an interface 201, and an internal thread is provided in the interface 201 to be able to mesh with the first external thread at the joint 21.

[0070] Exemplarily, the liquid container 2 can be a barrel or a tank.

[0071] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An impedance spectrum sensor connection mechanism, characterized in that, Comprising: A sensor body having a first section and a second section connected to each other. The outer diameter of the first section is larger than that of the second section to form a first step at the connection between the first section and the second section. A cable is provided at one end of the first section away from the second section. A joint assembly including a joint and a limiting member. The outer wall of the joint is provided with a first external thread for threaded connection with the interface of the liquid container. The interior of the joint has a through hole, and one end of the second section facing away from the first section passes through the through hole. The first step is rotatably clamped with the hole wall of the through hole, and the limiting member is detachably connected to the end of the second section passing through the through hole to limit the second section from withdrawing from the through hole.

2. The impedance spectrum sensor connection mechanism according to claim 1, wherein, Along the axial direction of the through hole, the through hole includes a first hole section and a second hole section connected to each other. The diameter of the first hole section is larger than that of the second hole section to form a second step on the inner wall of the joint corresponding to the connection between the first hole section and the second hole section. The second section passes through the first hole section and extends out of the second hole section, and the first step is rotatably clamped with the second step.

3. The impedance spectrum sensor connection mechanism according to claim 2, wherein, When the limiting member is connected to the second section, the limiting member and the first section respectively abut against the end walls of the joint corresponding to both ends of the second hole section.

4. The impedance spectrum sensor connection mechanism according to claim 3, wherein, The second section is provided with a second external thread, and the limiting member includes a nut, and the outer diameter of the nut is larger than the inner diameter of the second hole section.

5. The impedance spectrum sensor connection mechanism according to claim 4, characterized in that, The limiting member further includes a set screw, and the set screw extends into the nut from one side in the radial direction of the nut and abuts against the second section.

6. The impedance spectrum sensor connection mechanism according to claim 2, characterized in that, A first sealing ring is provided on the inner wall of the joint corresponding to the end of the first hole section away from the second hole section, and the first sealing ring is rotatably and sealingly connected to the first section.

7. The impedance spectrum sensor connection mechanism according to claim 1, characterized in that, A second sealing ring is provided on the outer wall of the joint, and the second sealing ring is used for sealing connection with the interface of the liquid container.

8. The impedance spectrum sensor connection mechanism according to claim 1, wherein, A cylindrical handle is protrudingly provided on the outer wall of the joint near the cable end, and the first external thread is provided on the side of the handle facing the second section.

9. The impedance spectrum sensor connection mechanism according to claim 8, wherein, A plurality of protruding anti-slip strips are spaced apart on the circumferential outer wall of the handle.

10. A liquid level detection system, characterized in that, Comprising: A liquid container provided with an interface having an internal thread provided therein. The impedance spectrum sensor connection mechanism according to any one of claims 1-9, wherein the joint is threadedly connected to the interface so that one end of the sensor body away from the first section extends into the liquid container.

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