CN220398456U - Pull rod type magnetostriction displacement sensor - Google Patents

Abstract

The application discloses pull rod type magnetostriction displacement sensor, including sensor housing and set up in sensor housing both ends's aviation plug mount pad and end cover, set up the pull rod in the sensor housing, set up the tetrafluoro pipe in the pull rod, set up the shielding pipe in the tetrafluoro pipe, set up the slider on the pull rod, the slider embeds the magnetic core, the pull rod passes through the connecting axle and links to each other with moving parts, the pull rod drives the slider along the slide rail on the sensor housing inner wall and removes, set up modular sensing element subassembly in the aviation plug mount pad, signal board and circuit board have been set up in the aviation plug mount pad, aviation plug mount pad realizes receiving electricity and signal output through sensing element subassembly and signal board realization to the collection, processing and the output of position signal. The sensor has the advantages that the size of the sensor is integrally reduced through reasonable structural layout and the modular sensitive element assembly, the structure is compact, the space requirement of the sensor is reduced, the tightness is good, the maintenance and use cost is effectively reduced, and the mounting and dismounting difficulty is reduced.

Description

Pull rod type magnetostriction displacement sensor

Technical Field

The application relates to the technical field of displacement distance measuring instruments, in particular to a high-precision and high-reliability pull rod type magnetostrictive displacement sensor which can be widely used in industries such as military, petrochemical industry, mechanical manufacturing, metallurgy, energy source and the like.

Background

Magnetostrictive technology is used in large amounts in the military, petrochemical, mechanical manufacturing, metallurgical, energy industries due to its high precision and reliability. The magnetostrictive displacement sensor is widely applied to hydraulic device steering systems such as front axles of large engineering mechanical equipment, steering cylinders of joint frames and the like. The magnetostrictive displacement sensors are divided into an internal sensor and an external sensor according to the installation mode, and most of the external sensors are fixed together by virtue of anchor clamps, clamps and equipment. The built-in magnetostrictive displacement sensor is installed inside the oil cylinder during use and is a device for accurately measuring the telescopic displacement of the oil cylinder.

The magnetostrictive displacement sensor consists of an armor shell and internal electronic devices, and when the sensor is used in a complex environment for a long time, the internal electronic devices have the risk of aging and failure, so that the sensor inevitably fails during operation.

The sensor is not only required to remove the limitation of peripheral factors (such as space, environmental conditions and the like) during maintenance, but also needs to consume a great deal of time during replacement and maintenance, and a long-time shutdown can cause huge losses to special users such as equipment needing continuous operation, high temperature and high pressure, inflammability and explosiveness, military tasks, scientific experiments and the like. Therefore, the existing magnetostrictive displacement sensor has certain limitation on the difficulty of processing the position, the space and the parts during disassembly and assembly, and has higher technical requirements on workers during disassembly and assembly of the sensor. The problems of trouble and difficult maintenance are increased for field operation.

In addition, the mounting position reserved for the sensor under some complex working conditions is narrow, and the existing sensor is relatively large in size, so that the mounting is difficult.

Therefore, the magnetostrictive displacement sensor in the present stage has a plurality of defects, and a new technical scheme is needed to solve the problems existing in the prior art.

Disclosure of Invention

The application provides a pull rod type magnetostriction displacement sensor to solve the problem that the existing magnetostriction displacement sensor is relatively complex in structure and inconvenient to assemble and disassemble.

In order to achieve the above object, the present application provides the following technical solutions:

the application provides a pull rod type magnetostrictive displacement sensor, which comprises a sensor shell, wherein a pull rod is axially arranged in the sensor shell, a sliding block is arranged on the outer wall of the pull rod, a magnetic core is arranged in the sliding block, and a sliding rail matched with the sliding block is arranged on the inner wall of the sensor shell; a tetrafluoro tube is axially arranged in the pull rod, a shielding tube is axially arranged in the tetrafluoro tube, and a position sensing element is arranged in the shielding tube;

one end of the sensor shell is provided with an aviation plug mounting seat, a signal board and a sensitive element assembly connected with the signal board are arranged in the aviation plug mounting seat, the sensitive element assembly is connected with the position sensing element, the sensitive element assembly is of a modularized magnetostriction sensitive core structure, and an aviation plug is arranged at one end of the aviation plug mounting seat, which is away from the sensor shell;

an end cover is arranged at the other end of the sensor shell, a wear-resistant ring is arranged at the joint of the end cover and the sensor shell, a mounting channel allowing a connecting shaft to penetrate is formed on the end cover and the wear-resistant ring, and one end of the connecting shaft is connected with a pull rod;

the sensor shell is provided with a fixing component for connecting and fixing the sensor and external equipment.

In the above technical scheme, the sensor housing has a columnar shell structure with two through ends, and the slide rail extends along the axis direction of the sensor housing; the sensor shell is provided with the mounting groove that is used for installing the signal board on the terminal surface that the installation seat links to each other is inserted to the sensor shell, and the mounting groove corresponds with the signal board groove of seting up on the installation seat of inserting, and the one end cartridge of signal board is in the mounting groove, and the other end cartridge is in the signal board inslot.

Further, an electronic bin communicated with the inner cavity of the sensor shell is formed in the aviation plug mounting seat, and a signal board groove and a sensitive element assembly groove are formed in the inner wall of the electronic bin.

Further, still be provided with the circuit board in the electron bin, the circuit board links to each other with the signal board, is provided with the screw hole that is used for fixed circuit board on the mount pad that inserts, is provided with the circuit board groove on the sensor shell, and the one end cartridge of circuit board is in the circuit board groove, and the other end is fixed on the screw hole.

Further, a through hole for installing an aviation plug is formed in the side wall of the electronic bin, and aviation plug installation threads are formed in the inner wall of the through hole.

Further, a plurality of fixed holes are formed in the aviation plug mounting seat, a plurality of bolt mounting holes are formed in the sensor housing, a plurality of connecting holes are formed in the end cover, the fixed holes, the bolt mounting holes and the connecting holes are sequentially communicated in a corresponding mode, a mounting channel allowing the connecting bolts to be inserted is formed, and the aviation plug mounting seat, the sensor housing and the end cover are fastened through the connecting bolts.

Further, the end cover is a plate-shaped structural member with a through hole in the center, an annular groove is formed in the end face, connected with the sensor shell, of the end cover, and the annular groove and the through hole in the center of the end cover form a stepped groove for installing the wear-resisting ring.

Further, an inner thread is arranged on the inner wall of the pull rod, which is close to the connecting shaft, and an outer thread matched with the inner thread is arranged at one end of the connecting shaft; the other end of the connecting shaft is connected with an external moving part.

Further, a sealing groove is formed in the end face, connected with the sensor shell, of the aviation plug installation seat, and a sealing ring is embedded in the sealing groove.

Further, a fixing clamping groove is formed on the side wall of the sensor shell, and extends along the central axis direction of the sensor shell; clamping grooves communicated with the fixed clamping grooves are formed in the end cover and the aviation plug mounting seat.

Further, one or more fixing cards are arranged on the side wall of the sensor shell, one or more threaded mounting holes are formed in the fixing cards, fixing bolts are arranged in the threaded mounting holes in an adaptive mode, and the sensor shell is fastened and connected with external equipment through the fixing bolts.

Compared with the prior art, the application has the following beneficial effects:

the utility model provides a pull rod formula magnetostriction displacement sensor mainly includes sensor housing and sets up in the aviation plug mount pad and the end cover at sensor housing both ends, set up the pull rod in the sensor housing, set up the tetrafluoro pipe in the pull rod, set up the shielding pipe in the tetrafluoro pipe, set up the slider on the pull rod, the slider embeds the magnetic core, the pull rod passes through the connecting axle and links to each other with moving part, the pull rod operation drives the magnetic core operation, make the slider remove along the slide rail on the sensor housing inner wall, set up modular sensitive element subassembly in the aviation plug mount pad, not only the leakproofness is good still be convenient for assemble and dismantle, signal board and circuit board have still been set up in the aviation plug mount pad simultaneously, the aviation plug mount pad realizes connecing electric and signal output through sensitive element subassembly and signal board realization to the collection, processing and the output of position signal. Therefore, the magnetic core is arranged in the sliding block, the sliding block is connected with the sliding rail in an adapting way, smooth movement of the pull rod is achieved, the end cover and the sliding block are arranged at two ends of the pull rod, and further the pull rod is guaranteed to move stably; the sensor has the advantages that the size of the sensor is integrally reduced through reasonable structural layout and the use of the modular sensitive element assembly, the structure is compact, the space requirement of the sensor is reduced, the integral modular installation is realized, the installation difficulty is low, the sensitive element assembly is a core structure which is measured by adopting the magnetostriction principle, the measurement precision is high, the failure rate is low, the accurate measurement and the reliable output can be ensured, the maintenance is avoided, the maintenance and use cost can be effectively reduced, and the installation and disassembly difficulty is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. It should be understood that the specific shape and configuration shown in the drawings should not be considered in general as limiting upon the practice of the present application; for example, based on the technical concepts and exemplary drawings disclosed herein, those skilled in the art have the ability to easily make conventional adjustments or further optimizations for the add/subtract/assign division, specific shapes, positional relationships, connection modes, dimensional scaling relationships, etc. of certain units (components).

FIG. 1 is a schematic perspective view of a pull rod magnetostrictive displacement sensor according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a front view of a pull rod magnetostrictive displacement sensor according to an embodiment of the present disclosure;

FIG. 3 is a schematic left-hand view of the structure of FIG. 2;

FIG. 4 is a schematic diagram of an internal structure of a pull rod magnetostrictive displacement sensor according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of the internal structure of an air insert mounting seat of the pull rod type magnetostrictive displacement sensor according to an embodiment, wherein the layout of each mounting groove in the air insert mounting seat is mainly shown from the top view;

FIG. 6 is a schematic cross-sectional view of section A-A of FIG. 5;

FIG. 7 is a schematic side view of the remaining structure after removal of the air insert mounting base in one embodiment, illustrating mainly the structural connection of the mounting slots at the end of the sensor housing and the tie rods and rails within the sensor housing;

FIG. 8 is a schematic diagram of a modular sensor assembly used in the present application in a cross-sectional configuration in one embodiment;

fig. 9 is a schematic perspective view of the remaining structure at one view angle after the shield and shield tube are removed based on the structure of the sensor assembly provided in fig. 8.

Reference numerals illustrate:

01. a sensor board; 02. a shield; 03. a support column; 04. a base; 05. a shielding tube; 06. a plug; 07. a glass fiber tube; 08. a waveguide wire; 09. a high temperature wire; 010. a coil support base; 011. a coil support; 012. a wire protecting sleeve; 013. a soft row socket;

1. aviation plug; 2. the aviation plug mounting seat; 21. a signal board groove; 22. a sensor assembly slot; 23. aerial insertion mounting threads; 24. a threaded hole; 25. a fixing hole; 26. sealing grooves; 3. a sensor housing; 31. a slide rail; 32. a circuit board slot; 33. a fixing slot; 34. a bolt mounting hole; 4. an end cap; 5. fixing the card; 6. a fixing bolt; 7. a connecting bolt; 8. a connecting shaft; 9. an O-ring; 10. a wear ring; 11. a pull rod; 12. a tetrafluoro tube; 13. a shielding tube; 14. a slide block; 15. a signal board; 16. a sensor assembly; 17. a position sensing element.

Detailed Description

The present application is further described in detail below with reference to the attached drawings.

In the description of the present application: unless otherwise indicated, the meaning of "a plurality" is two or more. The terms "first," "second," "third," and the like in this application are intended to distinguish between the referenced objects without a special meaning in terms of technical connotation (e.g., should not be construed as emphasis on degree or order of importance, etc.). The expressions "comprising", "including", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

The terms such as "upper", "lower", "left", "right", "middle", and the like, as referred to in this application, are generally used for convenience in visual understanding with reference to the drawings, and are not intended to be an absolute limitation of the positional relationship in actual products. Such changes in relative positional relationship are considered to be within the scope of the present description without departing from the technical concepts disclosed herein.

Example 1

The embodiment provides a pull rod type magnetostriction displacement sensor, which mainly comprises a sensor shell, an aviation plug mounting seat, an end cover, a sliding block, an aviation plug, a signal board, a sensitive element assembly, a pull rod, a connecting shaft and the like. The sensing element assembly in the application is a modular magnetostrictive sensing core structure.

In this embodiment, the modular magnetostrictive sensitive core structure may be an independent component assembled by the sensitive element plate 01, the shielding case 02, the support column 03, the base 04, the shielding tube 05, the plug 06, the glass fiber tube 07, the waveguide wire 08, the high-temperature wire 09, the coil support base 010, the coil support 011, the wire protection sleeve 012 and the soft-row socket 013, as shown in fig. 8.

Referring to fig. 8, a shielding cover 02 is installed on one side of a base 04, and a shielding seal cavity is formed by the shielding cover 02 and the base 04. The base 04 may be made of stainless steel, and the shield 02 may be welded to the base 04 during installation.

The shielding sealing cavity is internally provided with: the sensor board 01 and the coil support 010 respectively mounted on the base 04, the support posts 03 and the coil supports 011 respectively inserted on the coil support 010, and the flat cable welded and fixed on the sensor board 01. Wherein, the flat cable is connected with a soft-row socket 013 positioned outside the shielding cover 02, and when the assembly of elements in the shielding seal cavity is completed or when the components in the magnetostriction sensitive core structure are all installed in place, insulating seal glue can be filled in the shielding seal cavity.

With continued reference to fig. 8, the other side of the base 04 is provided with a shielding tube 05, a glass fiber tube 07 is provided in the shielding tube 05, and a waveguide 08 and a high-temperature wire 09 are provided in the glass fiber tube 07. During installation, the waveguide wire 08 can pass through the coil support seat 010 and be welded and fixed with the support column 03 and the sensitive element plate 01 respectively, and the support column 03 can fix the waveguide wire 08 to play a role in filtering clutter. The high-temperature wire 09 passes through the coil bracket seat 010 to be welded and fixed with the sensor plate 01, and the high-temperature wire 09 is connected with the sensor plate 01 and transmits pulse signals.

The shield 02 is provided with a wire guard 012, and the flat cable passes through the wire guard 012 and is connected to the soft-row socket 013. Referring to fig. 8, the wire guard 012 and the shield 02 are threaded over the wires of the flexible flat receptacle 013, and the wires of the flexible flat receptacle 013 are soldered to the sensor board 01. The wire protective sleeve 012 protects the soft-row receptacle 013 from being scratched by the shield 02. The soft socket 013 is connected with signal transmission between the sensing element board 01 and the sensor circuit board, so that plug and play can be realized. The flat cable is a plurality of circuits welded and fixed on the sensitive element board 01, and the circuits are uniformly arranged in a row at equal intervals.

The base 04 is a plate-shaped structural member, a through hole is formed in the base 04, and a first end of the coil support seat 010 penetrates through the through hole and stretches into the shielding tube 05; a structural hole allowing the waveguide 08 and the high-temperature wire 09 to pass through is formed on the coil support 010; the second end of the coil support seat 010 is positioned in the shielding sealing cavity and is clung to the surface of the base 04, the support column 03 and the coil support 011 are oppositely arranged on the second end, a channel allowing the waveguide wire 08 and the high-temperature wire 09 to pass through is formed on the support column 03, and the central axis of the support column 03 coincides with the central axis of the glass fiber tube 07. The coil holder 010 is fixed to the base 04 by screws. The first end of the coil support seat 010 is fixed by gluing with the glass fiber tube 07. The sensor board 01 and the coil support 011 are oppositely arranged at two sides of the support column 03, and the support column 03 is close to the sensor board 01.

The coil support seat 010 is provided with a first preformed hole for inserting the support column 03, the coil support seat 010 is provided with a second preformed hole for inserting the coil support 011, and the coil support 011 is welded and fixed with the sensitive element plate 01 after being inserted into the coil support seat 010. The coil support seat 010 is fixed with the base 04, and can support the sensitive element plate 01, the support column 03 and the coil support 011; the coil bracket 011 winds the red copper coil and is connected with the sensitive element plate 01 to amplify signals.

One end of the shielding pipe 05, which is away from the base 04, is provided with a plug 06, the shielding pipe 05 is fixed with the plug 06 by laser welding, and the shielding pipe 05 is fixed with the base 04 by laser welding. The glass fiber tube 07 arranged in the shielding tube 05 is connected with the support seat 010 to protect the waveguide wire 08 and the high-temperature lead 09, is made of flexible materials, has shock resistance, can reduce the influence caused by shock, and ensures the detection precision. The waveguide 08 provided in the glass fiber tube 07 and the high-temperature wire 09 may be welded together, and the waveguide 08 provided in the glass fiber tube 07 is a medium for achieving generation and propagation of an elastic wave signal.

The sensor board 01 can not only receive pulse excitation, but also amplify the feedback signal. The base 04 is fixedly connected with the coil support 010 and welded with the shielding cover 02, the shielding pipe 05 and the plug 06 to form a shielding cavity, so that interference of the external environment on the sensor board 01 can be shielded, and a sensor assembly on the sensor board 01 can be protected.

The base 04, the shielding cover 02, the shielding pipe 05 and the plug 06 are all made of stainless steel materials, such as corrosion-resistant stainless steel materials, so that the service life can be prolonged. The whole stainless steel shell structure is convenient to weld and fix, and the whole stainless steel shell structure is welded to form a closed space, so that external interference signals can be effectively shielded, and the aim of high precision is fulfilled.

In the actual assembly process, after the sensitive element plate 01, the bracket column 03, the glass fiber tube 07, the waveguide wire 08, the high-temperature lead 09, the coil bracket seat 010, the coil bracket 011, the wire protection sleeve 012 and the soft row socket 013 are assembled, the shielding cover 02 and the base 04 are welded together through a spot welder, and finally, the insulating sealant is filled with the shielding cover 02 for solidification, so that the sensitive component core provided by the application is assembled, the waterproof tightness is guaranteed, and the shock resistance is realized.

The sensitive element assembly used in the application can be used as an independent module to be installed in the displacement sensor, so that the sensor is convenient to assemble, disassemble and replace, the assembly time and maintenance cost of the sensor are reduced, and the difficulty of assembly is reduced.

The following describes in detail the structural composition of a pull rod type magnetostrictive displacement sensor provided in the present application with reference to the accompanying drawings.

The pull rod type magnetostrictive displacement sensor provided by the application comprises a sensor housing 3, wherein the sensor housing 3 is of a cylindrical shell structure with two ends penetrating through, as shown in figures 1 and 2.

Referring to fig. 4, a pull rod 11 is axially arranged in the sensor housing 3, a slide block 14 is arranged on the outer wall of the pull rod 11, a magnetic core is arranged in the slide block 14, and a slide rail 31 matched with the slide block 14 is arranged on the inner wall of the sensor housing 3. The sensor housing 3 is used for protecting internal components and providing a track for the sliding block 14 to run; the sliding block 14 is fixed on the pull rod 11, and the magnetic core is arranged in the sliding block 14, so that the pull rod 11 can operate to drive the magnetic core to operate.

With continued reference to fig. 4, a tetrafluoro tube 12 is axially disposed within the pull rod 11, a shield tube 13 is axially disposed within the tetrafluoro tube 12, and a position sensing element 17 is disposed within the shield tube 13. In the concrete manufacturing and installation, the glass fiber tube 07 arranged in the shielding tube 05 in the sensitive element assembly 16 can be arranged in the shielding tube 13 in the pull rod 11. Of course, the shielding tube 05 in the sensor assembly 16 may be inserted into the shielding tube 13 in the pull rod 11, which is cumbersome and costly.

The tetrafluoro tube 12 is used for insulating the shielding tube 13 from the pull rod 11, and preventing the pull rod 11 from being worn away from the shielding tube 13;

in this application, see fig. 4, one end of sensor housing 3 sets up aviation plug mount pad 2, sets up the signal board in the aviation plug mount pad 2 and with the sensing element subassembly that the signal board links to each other, sensing element subassembly links to each other with position sensing element 17, aviation plug 1 is installed to the one end that aviation plug mount pad 2 deviates from sensor housing 3. The aviation plug 1 is used for supplying power to the sensor and outputting a position signal. The aviation plug installation seat 2 is used for fixing components such as a sensitive element assembly, a circuit board, an aviation plug 1 and the like, and protecting and sealing the internal components.

The sensor housing 3 is provided with the mounting groove that is used for installing the signal board on the terminal surface that the aviation plug mount pad 2 links to each other, and the mounting groove corresponds with the signal board groove 21 of seting up on the aviation plug mount pad 2, and the one end cartridge of signal board is in the mounting groove, and the other end cartridge is in signal board groove 21, and signal board one end stretches into in the signal board groove 21, is connected with aviation plug 1 through the connector, and the signal board is used for the processing and the output to the position signal.

Referring to fig. 5, a sealing groove 26 is formed in the end surface, connected with the sensor housing 3, of the aviation plug mounting base 2, and a sealing ring is embedded in the sealing groove 26. An electronic bin communicated with the inner cavity of the sensor housing 3 is formed in the aviation plug mounting seat 2, and a signal board groove 21 and a sensitive element assembly groove 22 are formed in the inner wall of the electronic bin. The electronic cabin is also internally provided with a circuit board which is connected with the signal board, the aerial plug mounting seat 2 is provided with a threaded hole 24 for fixing the circuit board, the sensor housing 3 is provided with a circuit board groove 32, one end of the circuit board is inserted into the circuit board groove 32, and the other end of the circuit board is fixed on the threaded hole 24.

The aviation plug mounting seat 2 is provided with a through hole for mounting the aviation plug 1, and the inner wall of the through hole is provided with aviation plug mounting threads 23 for fixing the aviation plug 1.

In this application, referring to fig. 4, the other end of the sensor housing 3 is provided with an end cap 4, and the end cap 4 is used for ensuring smooth operation of the pull rod 11, protecting and sealing internal components. The wearing ring 10 is arranged at the joint of the end cover 4 and the sensor housing 3, a mounting channel allowing the connecting shaft 8 to penetrate is formed on the end cover 4 and the wearing ring 10, one end of the connecting shaft 8 is connected with the pull rod 11, and the wearing ring 10 can not only ensure the normal operation of the pull rod 11, but also play roles of sealing, resisting abrasion and prolonging the service life.

The wear ring 10 is in this case mounted on the end cap 4 and is secured by the assembly of the end cap 4 with the sensor housing 3. Specifically, referring to fig. 4, the end cover 4 is a plate-shaped structural member with a through hole in the center, an annular groove is formed on the end surface of the end cover 4 connected with the sensor housing 3, and the annular groove and the through hole in the center of the end cover 4 form a stepped groove for installing the wear-resistant ring 10. In the application, the pull rod 11 is connected with the connecting shaft 8 through threads, the slide block 14 is connected with the pull rod 11 through threads in a fastening mode, the pull rod 11 is fixed with the slide block 14, and the slide block 14 is driven to operate in operation.

In this application, in order to realize the fixed connection of socket mount pad 2, sensor housing 3 and end cover 4, can set up four fixed orifices 25 on socket mount pad 2, be provided with four bolt-up holes 34 on the sensor housing 3, be provided with four connecting holes on the end cover 4, fixed orifices 25, bolt-up holes 34 and connecting holes correspond the intercommunication in proper order to form the installation passageway that allows connecting bolt 7 cartridge, socket mount pad 2, sensor housing 3 and end cover 4 pass through connecting bolt 7 fastening and link to each other, like fig. 1, 7.

In this application, in order to achieve a fixed connection of the sensor with an external device, a fixing assembly may be provided on the sensor housing 3.

In this embodiment, a fixing slot 33 is formed on the side wall of the sensor housing 3, and the fixing slot 33 extends along the central axis direction of the sensor housing 3, see fig. 3; the end cover 4 and the aviation plug installation seat 2 are respectively provided with a clamping groove communicated with the fixed clamping groove 33. The fixing clamping groove 33 can be connected with an adaptive installation sliding rail 31 and the like which are arranged on the external device in an adaptive manner, so that the sensor housing 3 is fixedly installed.

The utility model provides a pull rod formula magnetostriction displacement sensor mainly includes sensor housing 3 and sets up in the aviation plug mount pad 2 and the end cover 4 at sensor housing 3 both ends, set up pull rod 11 in the sensor housing 3, set up tetrafluoro pipe 12 in the pull rod 11, set up shield pipe 13 in the tetrafluoro pipe 12, set up slider 14 on the pull rod 11, slider 14 embeds the magnetic core, pull rod 11 links to each other with the movable part through connecting axle 8, pull rod 11 operation drives the magnetic core operation, make slider 14 remove along slide rail 31 on the sensor housing 3 inner wall, set up modular sensing element subassembly in the aviation plug mount pad 2, not only the leakproofness is good still be convenient for assemble and dismantle, signal plate and circuit board have still been set up in the aviation plug mount pad 2 simultaneously, aviation plug 1 is realized connecing electric and signal output through sensing element subassembly and signal plate realization to the collection, processing and the output of position signal. Therefore, the magnetic core is arranged in the sliding block 14, the sliding block 14 is connected with the sliding rail 31 in an adapting way, smooth movement of the pull rod 11 is achieved, and the end cover 4 and the sliding block 14 are arranged at two ends of the pull rod 11 to further ensure smooth movement of the pull rod 11; the sensor has the advantages that the size of the sensor is integrally reduced through reasonable structural layout and the use of the modular sensitive element assembly, the structure is compact, the space requirement of the sensor is reduced, the integral modular installation is realized, the installation difficulty is low, the sensitive element assembly is a core structure which is measured by adopting the magnetostriction principle, the measurement precision is high, the failure rate is low, the accurate measurement and the reliable output can be ensured, the maintenance is avoided, the maintenance and use cost can be effectively reduced, and the installation and disassembly difficulty is reduced.

Example two

The present embodiment differs from the first embodiment in that the present embodiment uses the fixing card 5 to fix the sensor housing 3. Specifically, one or more fixing cards 5 are installed on the side wall of the sensor housing 3, preferably two fixing cards 5 are provided, see fig. 3 and 4, the two fixing cards 5 are oppositely arranged, two threaded mounting holes are formed in each fixing card 5, fixing bolts 6 are installed in the threaded mounting holes in an adaptive mode, and the sensor housing 3 is fastened and connected with external equipment through the fixing bolts 6.

The pull rod type magnetostrictive displacement sensor provided by the embodiment has the advantages of convenience in mounting and dismounting, high-precision measurement, high stability and high reliability data output, small structure size, no maintenance and suitability for various complex environments, and can be widely applied to the field of linear displacement detection.

Any combination of the technical features of the above embodiments may be performed (as long as there is no contradiction between the combination of the technical features), and for brevity of description, all of the possible combinations of the technical features of the above embodiments are not described; these examples, which are not explicitly written, should also be considered as being within the scope of the present description.

The foregoing has outlined and detailed description of the present application in terms of the general description and embodiments. It should be appreciated that numerous conventional modifications and further innovations may be made to these specific embodiments, based on the technical concepts of the present application; but such conventional modifications and further innovations may be made without departing from the technical spirit of the present application, and such conventional modifications and further innovations are also intended to fall within the scope of the claims of the present application.

Claims (8)

1. The pull rod type magnetostrictive displacement sensor is characterized by comprising a sensor shell, wherein a pull rod is axially arranged in the sensor shell, a sliding block is arranged on the outer wall of the pull rod, a magnetic core is arranged in the sliding block, and a sliding rail matched with the sliding block is arranged on the inner wall of the sensor shell; a tetrafluoro tube is axially arranged in the pull rod, a shielding tube is axially arranged in the tetrafluoro tube, and a position sensing element is arranged in the shielding tube;

one end of the sensor shell is provided with an aviation plug mounting seat, a signal board and a sensitive element assembly connected with the signal board are arranged in the aviation plug mounting seat, the sensitive element assembly is connected with a position sensing element, the sensitive element assembly is of a modularized magnetostriction sensitive core structure, and an aviation plug is arranged at one end of the aviation plug mounting seat, which is away from the sensor shell;

an end cover is arranged at the other end of the sensor shell, a wear-resistant ring is arranged at the joint of the end cover and the sensor shell, an installation channel allowing a connecting shaft to penetrate is formed on the end cover and the wear-resistant ring, and one end of the connecting shaft is connected with a pull rod;

the sensor shell is provided with a fixing component used for connecting and fixing the sensor and external equipment.

2. The pull rod type magnetostrictive displacement sensor according to claim 1, wherein the sensor housing has a columnar shell structure with two ends penetrating, and the slide rail extends along the axial direction of the sensor housing; the sensor shell with be provided with the mounting groove that is used for installing the signal board on the terminal surface that the installation seat links to each other of aviation plug, the mounting groove corresponds with the signal board groove of seting up on the installation seat of aviation plug, the one end cartridge of signal board is in the mounting groove, and the other end cartridge is in the signal board groove.

3. The pull rod type magnetostrictive displacement sensor according to claim 1, wherein an electronic bin communicated with the inner cavity of the sensor housing is formed in the aviation plug mounting seat, and a signal plate groove and a sensitive element assembly groove are formed on the inner wall of the electronic bin;

the electronic cabin is internally provided with a circuit board which is connected with the signal board, the aerial socket mounting seat is provided with a threaded hole for fixing the circuit board, the sensor shell is provided with a circuit board groove, one end of the circuit board is inserted into the circuit board groove, and the other end of the circuit board is fixed on the threaded hole;

a through hole for installing an aviation plug is formed in the side wall of the electronic bin, and aviation plug installation threads are formed in the inner wall of the through hole;

the sensor comprises an end cover, a sensor housing, a plurality of bolt mounting holes, a plurality of connecting holes, a plurality of fixing holes, a plurality of bolt mounting holes, a plurality of connecting channels, a plurality of connecting bolt fixing holes and a plurality of connecting bolt fixing holes are formed in the aerial plug mounting seat, the sensor housing and the end cover are connected through the connecting bolt in a fastening mode.

4. The pull rod type magnetostrictive displacement sensor according to claim 1, wherein the end cover is a plate-shaped structural member with a through hole in the center, an annular groove is formed in an end surface of the end cover connected with the sensor housing, and the annular groove and the through hole in the center of the end cover form a stepped groove for installing the wear ring.

5. The pull rod type magnetostrictive displacement sensor according to claim 1, wherein an inner thread is arranged on an inner wall of the pull rod, which is close to the connecting shaft, and an outer thread which is matched with the inner thread is arranged at one end of the connecting shaft; the other end of the connecting shaft is connected with an external moving part.

6. The pull rod type magnetostrictive displacement sensor according to claim 1, wherein a sealing groove is formed in the end face, connected with the sensor housing, of the aviation plug mounting base, and a sealing ring is embedded in the sealing groove.

7. The pull rod type magnetostrictive displacement sensor according to claim 1, wherein a fixing groove is formed on a side wall of the sensor housing, and the fixing groove extends along a central axis direction of the sensor housing; and clamping grooves communicated with the fixed clamping grooves are formed in the end cover and the aviation plug mounting seat.

8. The pull rod type magnetostrictive displacement sensor according to claim 1, wherein the sensor housing is provided with one or more fixing cards on the side wall, the fixing cards are provided with one or more threaded mounting holes, the threaded mounting holes are internally provided with fixing bolts in an adapting manner, and the sensor housing is fixedly connected with external equipment through the fixing bolts.