CN212228182U - Calibration device for magnetostrictive liquid level meter - Google Patents

Abstract

The utility model relates to a magnetostrictive liquid level meter calibration device, relating to the technical field of flowmeter calibration devices; comprises a frame; a plurality of instrument supports arranged on the frame and arranged along the length direction of the frame; the magnetic steel component is positioned above the instrument bracket; and the linear sliding table is used for guiding and driving the magnetic steel assembly to slide along the length direction of the frame. The utility model has the advantages of more accurate calibration.

Description

Calibration device for magnetostrictive liquid level meter

Technical Field

The utility model belongs to the technical field of flowmeter calibration device technique and specifically relates to a magnetostrictive liquid level meter calibration device is related to.

Background

At present, when a sensor of a magnetostrictive liquid level meter works, a circuit part of the sensor excites pulse current on a waveguide wire, and when the current propagates along the waveguide wire, a pulse current magnetic field is generated around the waveguide wire; a sensor probe rod of the magnetostrictive liquid level meter is externally provided with a floater, and the floater can move up and down along the probe rod along with the change of the liquid level; a group of permanent magnetic rings are arranged inside the floater; when the pulse current magnetic field meets the magnetic ring magnetic field generated by the floater, the magnetic field around the floater changes, so that the waveguide wire made of magnetostrictive material generates a torsional wave pulse at the position of the floater, and the pulse is transmitted back along the waveguide wire at a fixed speed and is detected by the detection mechanism. The position of the float, i.e. the position of the liquid level, can be accurately determined by measuring the time difference between the pulse current and the torsional wave.

Referring to fig. 1, a conventional method for calibrating a magnetostrictive liquid level meter firstly marks a measuring range scale 410 on a probe rod 41 by using a marking pen through a measuring tape, sleeves a floater 411 with a permanent magnetic ring on the probe rod 41, then moves the floater 411 by hand to change the position of the floater 411 on the probe rod 41, and calculates the wave velocity of a waveguide wire through signal change generated by the moving distance of the floater 411 on the probe rod 41, thereby calibrating a measured meter 4.

The above prior art solutions have the following drawbacks: the calibration method for the measured instrument 4 has low efficiency, and each measured instrument 4 needs to be calibrated independently; in addition, the measuring precision of the measuring tape is limited, and errors exist by artificially carving the measuring range scale 410; there is also a certain error when the position of the float 411 is manually moved; the calibration accuracy of the measured instrument 4 is relatively poor.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a magnetostrictive liquid level meter calibration device has the advantage of calibrating more accurately.

The above object of the present invention is achieved by the following technical solutions:

a calibration device of a magnetostrictive liquid level meter comprises a frame; a plurality of instrument supports arranged on the frame and arranged along the length direction of the frame; the magnetic steel component is positioned above the instrument bracket; and the linear sliding table is used for guiding and driving the magnetic steel assembly to slide along the length direction of the frame.

By adopting the technical scheme, when the measured instrument is calibrated, the linear sliding table drives the magnetic steel assembly to move along the linear direction, and the movement distance of the measured instrument to the magnetic steel assembly generates a signal, so that the wave velocity of the waveguide wire is calculated according to the change of the signal, and the detection of the measured instrument is further realized; through setting up the distance of sharp slip table control magnet steel displacement, reduced the produced error of artificial marking off and removal float to the mark of messenger by the survey appearance is proofreaded more accurately.

The present invention may be further configured in a preferred embodiment as: the linear sliding table comprises fixed seats arranged at two ends of the linear sliding table, and a shell which is fixedly connected between the two fixed seats and is parallel to the length direction of the probe rod; the threaded lead screw is rotatably supported between the two fixed seats and is positioned in the shell; the sliding block is in threaded connection with the threaded lead screw; the servo motor is fixedly connected to one end of the threaded screw rod and used for driving the threaded screw rod to rotate; the shell is provided with a guide groove; the upper end of the sliding block protrudes out of the guide groove of the shell and is in sliding fit with the guide groove; the magnetic steel component is arranged at one end of the sliding block protruding out of the guide groove.

Through adopting above-mentioned technical scheme, when being surveyed the appearance and proofreading, start servo motor, servo motor drives the screw thread lead screw and rotates, and when the screw thread rotated, the slider moved on the screw thread lead screw to drive the magnet steel and remove in the framework, the convenient regulation to the magnet steel subassembly position.

The present invention may be further configured in a preferred embodiment as: the instrument support is provided with a plurality of caulking grooves distributed along the length direction of the instrument support; the caulking grooves on the instrument supports correspond one to one; the probe rod of the measured instrument is embedded in the embedding groove; the magnetic steel component comprises a transverse plate fixed on the sliding block and a plurality of magnetic steels which are arranged on the transverse plate and correspond to the embedded grooves in the instrument bracket.

Through adopting above-mentioned technical scheme, through setting up multirow instrument support and diaphragm, can realize detecting a plurality of meters under test simultaneously, improve detection efficiency, reduce the work load that detects.

The present invention may be further configured in a preferred embodiment as: a plurality of mounting holes penetrating through the surface of the transverse plate are formed in the vertical plate surface of the transverse plate; the magnetic steel component also comprises a pin penetrating through the mounting hole; the soft iron is annular and is sleeved at one end of the pin penetrating through the transverse plate; one end of the pin, which is far away from the soft iron, is a large end and is abutted against the transverse plate; the magnetic steel is annular and is sleeved at one end of the pin penetrating through the soft iron; the magnetic steel is connected with the soft iron and the pin in an adsorption manner.

By adopting the technical scheme, the installation and the replacement of the magnetic steel on the instrument to be tested are more convenient.

The present invention may be further configured in a preferred embodiment as: and a clamping assembly for clamping the instrument to be measured is arranged at one end of the instrument to be measured on the frame.

Through adopting above-mentioned technical scheme, when marking the school to being surveyed the appearance, use clamping assembly to press from both sides the probe rod tightly, reduce because the external factor is surveyed the possibility that the appearance removed in the caulking groove, improve the accuracy that is surveyed the appearance and marks the school.

The present invention may be further configured in a preferred embodiment as: the clamping assembly comprises a mounting frame fixedly connected to the frame; the clamping blocks are fixedly connected to the mounting frame and correspond to the measured instruments one by one; the clamping block is arranged opposite to the clamping block and matched with the upper surface of the mounting frame in a sliding mode, and the push rod is used for driving the clamping plate to slide on the mounting frame.

Through adopting above-mentioned technical scheme, promote splint through the start-up push rod and slide towards pressing from both sides tight piece direction, will be surveyed the instrument and press from both sides tightly in splint and press from both sides between the tight piece, improve the stability of being surveyed the instrument when detecting.

The present invention may be further configured in a preferred embodiment as: the surface of the clamping block opposite to the clamping plate is an inclined surface which inclines upwards.

Through adopting above-mentioned technical scheme, press from both sides the relative one side tilt up of tight piece and splint, press from both sides tight messenger of probe rod when splint move towards pressing from both sides tight piece, splint and press from both sides and form a triangular crack between the tight piece, not only have a clamp force to the horizontal transverse direction of probe rod, exert a clamp force in longitudinal direction equally, reduce probe rod circumferential direction's possibility, stability when further improving the probe rod and press from both sides tightly.

The present invention may be further configured in a preferred embodiment as: the mounting frame and the clamping blocks are provided with limit sliding chutes extending towards the direction of the inclined planes of the clamping blocks in a one-to-one correspondence manner; the clamping plates are provided with a plurality of blocks which are respectively embedded in the limiting sliding grooves and are in sliding fit with the limiting sliding grooves; one side of the clamping plate, which is positioned in the limiting sliding groove, is provided with a threaded through hole penetrating through the surface of the clamping plate; the push rod is rotatably supported on the mounting frame; the periphery of the push rod is provided with threads; the push rod penetrates through the thread through holes of the clamping plates and is in threaded connection with the thread through holes of the clamping plates.

Through adopting above-mentioned technical scheme, rotate through the drive push rod, a plurality of splint move towards the tight piece direction of clamp that corresponds in spacing spout simultaneously to the probe rod that realizes a plurality of testees in step presss from both sides tightly, makes the clamp of testees on the frame tight more convenient.

The present invention may be further configured in a preferred embodiment as: the bottom of the frame is provided with a supporting leg for adjusting the height of the frame and the ground; a containing hole is formed in the bottom of the frame and corresponds to the supporting leg, and the containing hole is a threaded hole; the supporting legs comprise a base and an adjusting rod, one end of the adjusting rod is rotatably connected with the base, and the other end of the adjusting rod is in threaded connection with the accommodating hole.

By adopting the technical scheme, when the bottom surface of a factory is slightly hollow or uneven, the adjusting rod is rotated, the base is fixed at the moment, the adjusting rod rotates in the accommodating hole, and the height of the corresponding position of the frame can be adjusted by rotating the adjusting rod; the levelness of the sliding table is improved, and the calibration precision is further improved.

The present invention may be further configured in a preferred embodiment as: the base is in a circular truncated cone shape; the small end face of the base is provided with a shaft hole along the axis direction of the base, and the large end face of the base is provided with a mounting groove communicated with the shaft hole; a limiting ring is coaxially arranged at one end of the adjusting rod, which is far away from the accommodating hole; a shaft rod with smooth periphery is coaxially arranged on one surface of the limiting ring, which is far away from the limiting rod; the shaft lever is inserted into the shaft hole of the base and is in running fit with the shaft hole; the limiting ring is abutted against the small end face of the base; a threaded part is coaxially arranged at one end of the shaft lever, which is far away from the limiting ring; the outer diameter of the thread part is smaller than that of the shaft rod; and the screw thread part is screwed with a limit nut.

By adopting the technical scheme, the adjusting rod is rotatably matched with the base, and the base is convenient to mount and dismount on the limiting rod; the round platform-shaped base improves the stability of support.

To sum up, the utility model discloses a following at least one useful technological effect:

1. compared with the prior art, the method reduces errors caused by manual line drawing and float moving, so that the calibration of the instrument to be measured is more accurate.

2. Through setting up clamping assembly, improved the stability of being surveyed the appearance on the frame, further improved the calibration precision.

Drawings

FIG. 1 is a schematic structural diagram of a calibration device of a conventional magnetostrictive liquid level meter;

FIG. 2 is a schematic structural diagram of a calibration device of a magnetostrictive liquid level meter in this embodiment;

FIG. 3 is a cross-sectional view of the linear stage;

FIG. 4 is an exploded view showing the structure of the magnetic steel assembly;

FIG. 5 is a schematic structural view of the clamping assembly;

FIG. 6 is an exploded view of the support leg to show the structure of the support leg;

fig. 7 is a cross-sectional view showing the internal structure of the support foot.

In the figure, 1, frame; 10. an upper frame body; 100. a first cross bar; 101. a first connecting rod; 11. a lower frame body; 110. a second cross bar; 1100. an accommodation hole; 111. a second connecting rod; 12. a vertical rod; 13. a laser range finder; 2. a linear sliding table; 20. a fixed seat; 21. a housing; 210. a guide groove; 22. a threaded lead screw; 220. a first bevel gear; 23. a servo motor; 230. a second bevel gear; 24. a slider; 240. a sliding block; 241. mounting blocks; 3. an instrument holder; 30. caulking grooves; 4. a measured instrument; 40. a gauge head; 41. a probe rod; 410. calibration; 411. a float; 5. a magnetic steel component; 50. a transverse plate; 501. mounting holes; 51. soft iron; 52. a pin; 53. magnetic steel; 6. a control panel; 7. a clamping assembly; 70. a mounting frame; 700. a limiting chute; 701. accommodating grooves; 71. a clamping block; 72. a splint; 73. a push rod; 730. a hand wheel; 8. supporting legs; 80. a base; 800. a shaft hole; 801. mounting grooves; 802. a shock pad; 81. mounting a plate; 82. adjusting a rod; 820. a limiting ring; 8200. a ball bearing; 821. a shaft lever; 822. adjusting the nut; 823. tightly pushing the nut; 83. a threaded portion; 84. a limit nut; 9. and a roller.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 2, the magnetostrictive liquid level meter calibration device disclosed by the utility model comprises a frame 1, a linear sliding table 2, an instrument support 3, a measured instrument 4, a magnetic steel assembly 5 and a control panel 6; the frame 1 comprises an upper frame body 10, a lower frame body 11 and a vertical rod 12; the upper frame 10 includes a first cross bar 100 and a first connecting bar 101; the first cross bar 100 has two pieces and is arranged in parallel with each other; the first connecting rods 101 are provided with a plurality of parts and are uniformly arranged between the two first cross rods 100; two ends of a first connecting rod 101 are respectively and vertically fixedly connected with two first cross rods 100; the lower frame 11 is disposed below the upper frame 10; the lower frame 11 includes a second cross bar 110 and a second connecting bar 111; the second cross bar 110 and the second connecting bar 111 form a rectangular frame 1 structure; the vertical rods 12 are provided with a plurality of vertical rods and are respectively arranged at four corners of the upper frame body 10 and the lower frame body 11; the vertical rod 12 is fixedly connected with the upper frame body 10 and the lower frame body 11; the upper frame body 10 and the lower frame body 11 form a cuboid frame 1 structure; the upper frame body 10, the lower frame body 11 and the vertical rods 12 are all made of hollow aluminum profiles; the linear sliding table 2 is arranged on the upper frame body 10 and is parallel to the two first cross rods 100 of the upper frame body 10; the linear sliding table 2 is located in the middle of the two first cross rods 100 of the upper frame 10 and is fixedly connected to the plurality of first connecting rods 101.

Referring to fig. 3, the linear sliding table 2 includes a fixed base 20, a housing 21, a threaded lead screw 22, a servo motor 23 and a slider 24; the two fixed seats 20 are symmetrically and fixedly connected to the two first connecting rods 101 at the two ends of the cross rod; the shell 21 is hollow and fixedly connected with the two fixed seats 20; the threaded lead screw 22 is rotatably supported in the inner cavity of the shell 21 and is rotatably matched with the two fixed seats 20; the periphery of the threaded lead screw 22 is provided with threads; a first bevel gear 220 is coaxially and fixedly connected with one end of the threaded lead screw 22 in the fixed seat 20; the servo motor 23 is fixedly connected with the fixed seat 20; a second bevel gear 230 is coaxially and fixedly connected with the output end of the servo motor 23, and the second bevel gear 230 is meshed with the first bevel gear 220; the second bevel gear 230 is perpendicular to the axis of the first bevel gear 220; a guide groove 210 is arranged at the upper end of the threaded screw rod 22 on the shell 21; the slider 24 includes a slider block 240 and a mounting block 241; a threaded through hole is formed in the sliding block 240; the sliding block 240 is arranged on the threaded lead screw 22 and is in threaded connection with the threaded lead screw 22; the upper end of the sliding block 240 protrudes out of the guide groove 210 on the shell 21 and is in sliding fit with the guide groove 210; the mounting block 241 is disposed at one end of the sliding block 240 protruding the guide groove 210 and integrally cast with the sliding block 240.

Referring to fig. 2 and 3, the instrument holder 3 has a plurality of first connecting rods 101 respectively disposed on the upper frame 10 at two sides of the linear sliding table 2; a plurality of caulking grooves 30 are formed in one surface of the instrument support 3, which is far away from the first connecting rod 101; the plurality of caulking grooves 30 are arranged along the length direction of the linear sliding table 2; the caulking grooves 30 on the instrument supports 3 on the same side of the linear sliding table 2 correspond one to one; the measured instrument 4 comprises a meter head 40 and a probe rod 41; the probe rod 41 of the measured instrument 4 is embedded in the embedding groove 30 of the instrument bracket 3 and is parallel to the linear sliding table 2.

Referring to fig. 4, the magnetic steel assembly 5 includes a transverse plate 50, soft iron 51, a pin 52 and magnetic steel 53; the horizontal plate 50 is disposed on the upper frame 10 and perpendicular to the first cross bar 100; the transverse plate 50 is arranged on the mounting block 241 and fixed with the mounting block 241 through bolts; a plurality of mounting holes 501 penetrating through the surface of the transverse plate 50 are formed in the transverse plate 50; the soft iron 51 has a plurality of ring shapes; one end of the pin 52 is a large end, and the outer diameter of the large end is larger than the diameter of the mounting hole 501; the pin 52 penetrates through the mounting hole 501 and the through hole on the soft iron 51, and the large end of the pin 52 is abutted against one surface of the transverse plate 50 departing from the soft iron 51; the magnetic steel 53 is annular and is adsorbed on one surface of the soft iron 51 back to the transverse plate 50; one end of the pin 52 penetrating through the soft iron through hole is inserted into the through hole of the magnetic steel 53; laser range finders 13 are respectively arranged on the two first cross bars 100 of the frame 1 at positions close to the gauge heads 40; the control panel 6 is arranged on the frame 1, and a detection module and a control module are arranged in the control panel 6; the control panel 6 is electrically connected with the measured instrument 4, the servo motor 23 and the laser distance meter 13 and is used for collecting signals transmitted from the instrument and detecting and controlling the displacement of the magnetic steel 53.

Referring to fig. 5, a clamping assembly 7 for clamping the instrument 4 to be measured is arranged at one end of the frame 1, which is far away from the servo motor 23; the clamping assembly 7 comprises a mounting frame 70 fixedly connected to one end of the frame 1, which is far away from the servo motor 13; the clamping blocks 71 are fixedly connected to the upper surface of the mounting frame 70 and correspond to the probe rods 41 of the measured instrument 4 one by one; a clamping plate 72 which is arranged opposite to the clamping block 71 and is matched with the upper surface of the mounting frame 70 in a sliding way, and a push rod 73 which is used for driving the clamping plate 72 to slide on the mounting frame 70.

Referring to fig. 5, the surface of the clamping block 71 opposite to the clamping plate 72 is an inclined surface inclined upward; the mounting frame 70 is positioned at one side of the clamping block 71 and is provided with limiting sliding grooves 700 corresponding to the clamping block 71 one by one; the limiting sliding groove 700 extends towards the direction of the inclined surface of the clamping 71; the clamping plates 72 are embedded in the limiting sliding grooves 700 respectively, and the clamping plates 72 are in sliding fit with the limiting sliding grooves 700; one side of the clamping plate 72, which is positioned in the limiting sliding groove 700, is provided with a threaded through hole penetrating through the plate surface of the clamping plate 72; an accommodating groove 701 communicated with the limiting sliding groove 700 is formed in the mounting frame 70 along the length direction; the push rod 73 is rotatably supported in the accommodating groove 701, and one end of the push rod penetrates through the accommodating groove 701; the periphery of the push rod 73 is provided with threads; the push rod 73 is arranged in the thread through holes of the clamping plates 72 in a penetrating way and is in threaded connection with the thread through holes of the clamping plates 72; a hand wheel 730 is arranged at one end of the push rod 73 penetrating through the accommodating groove 701.

The implementation principle of the embodiment is as follows: when the instrument is calibrated, the probe rod 41 of the instrument is embedded into the instrument bracket 3, and then the hand wheel 730 is rotated to drive the push rod 73 to rotate; the clamping plate 72 slides in the limiting sliding groove 700 towards the inclined surface direction of the clamping block 71 to clamp the probe rod 41; then adsorbing the annular magnetic steel 53 to the annular magnet, starting the servo motor 23, driving the threaded lead screw 22 to rotate by the servo motor 23, and when the threaded lead screw 22 rotates, moving the slider 24 on the threaded lead screw 22 so as to drive the transverse plate 50 to move on the frame body; the movement distance of the measured instrument 4 to the magnetic steel 53 generates a signal, and the signal is transmitted into a detection module of the control panel 6, so that the wave velocity of the waveguide wire is calculated according to the change of the signal, and the detection of the measured instrument 4 is further realized; the transverse plate 50 can be provided with a plurality of magnetic steels 53, and the plurality of magnetic steels 53 on the transverse plate 50 are synchronously driven, so that a plurality of measured instruments 4 can be simultaneously detected, and the detection efficiency is improved; in conclusion, the distance of the linear sliding table 2 for controlling the displacement of the magnetic steel 53 is set, so that errors caused by manual marking and moving of the floater 411 are reduced, and the calibration of the measured instrument 4 is more accurate.

When the measured instrument 4 is used for measurement, the first cross bar 100 needs to be in a horizontal state as much as possible, and the cross plate 50 can move linearly along the horizontal direction as much as possible when moving; in the case of an instrumentation, it is difficult to ensure that the floor in the factory is very flat, and when the floor in the factory is uneven or has a slight depression, the frame may be inclined, which may affect the accuracy of the measurement.

In order to further improve the detection accuracy of the instrument 4 to be detected, referring to fig. 6 and 7, supporting legs 8 are provided at four corners of a lower frame 11 of the frame 1; the supporting foot 8 comprises a base 80, a mounting plate 81 and an adjusting rod 82; the base 80 is in a round table shape, and a shaft hole 800 is formed in the small end face of the base 80 along the axis direction; the big end surface of the base 80 is provided with an installation groove 801 communicated with the shaft hole 800; the mounting plates 81 are arranged at four corners of the lower frame 11 and fixedly connected with the second cross bar 110 through bolts; a receiving hole 1100 is provided on the second rail 110; the accommodating hole 1100 is perpendicular to the plate surface of the mounting plate 81 and penetrates through the plate surface of the mounting plate 81; the receiving hole 1100 is a threaded hole; the adjusting rod 82 is arranged between the base 80 and the mounting plate 81; the periphery of the adjusting rod 82 is provided with threads and is in threaded connection with the accommodating hole 1100; a limiting ring 820 is coaxially arranged at one end of the adjusting rod 82, which is far away from the accommodating hole 1100; a shaft lever 821 with smooth periphery is coaxially arranged on one surface of the limiting ring 820, which is far away from the limiting rod; the shaft 821 is inserted into the shaft hole 800 of the base 80 and is rotatably matched with the shaft hole 800; the limiting ring 820 abuts against the small end face of the base 80; a threaded part 83 is coaxially arranged at one end of the shaft 821, which is far away from the limiting ring 820; the outer diameter of threaded portion 83 is smaller than the outer diameter of stem 821; a limit nut 84 is screwed on the thread part 83; an adjusting nut 822 is fixedly connected to the adjusting rod 82 above the limiting ring 820; a tightening nut 823 is screwed to the adjusting lever 82 at a position close to the mounting plate 81.

Referring to fig. 6, balls 8200 are embedded on the surface of the limit ring 820 attached to the small end surface of the base 80; the ball 8200 is in rolling fit with the limit ring 820; a shock absorbing pad 802 is bonded to the large end surface of the base 80.

Referring to fig. 1, a roller 9 is provided on each second cross bar of the lower frame 11 at a position between the two support legs 8.

The implementation principle of the supporting leg 8 is as follows: when the bottom surface of the factory is slightly hollow or uneven, the jacking nut 823 tightly abutting against the mounting plate 81 is loosened, then the adjusting nut 822 is clamped by a wrench to rotate, at the moment, the base 80 is fixed, and the adjusting rod 82 rotates in the accommodating hole 1100; the height of the corresponding position of the frame 1 can be adjusted by rotating the adjusting rod 82; when the adjusting rod 82 is rotated, the ball 8200 embedded on the limit ring 820 can convert the sliding friction between the limit ring 820 and the small end surface of the base 80 into rolling friction, so that the adjustment fluency is improved; the shock pad 802 can make the frame 1 more stable, and reduce the influence of external vibration on the calibration precision; after the adjusting height is adjusted to a proper height, the jacking nut 823 is rotated to be tightly abutted against the mounting plate 81, and the jacking nut 823 bears a force, so that the contusion of the adjusting rod 82 to the threads inside the accommodating hole 1100 is reduced; after the measurement is finished, the height of the frame 1 is reduced, and after the frame 1 is lowered to a certain height, the roller 9 is in contact with the ground, so that the frame 1 can be pushed, and the carrying of the calibration device is facilitated; in conclusion, the supporting legs 8 with adjustable height are arranged, and the calibration precision is further improved.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (10)

1. The utility model provides a magnetostrictive liquid level meter calibration device which characterized in that: comprising a frame (1); a plurality of instrument supports (3) which are arranged on the frame (1) and are arranged along the length direction of the frame (1); the instrument comprises a magnetic steel component (5) positioned above an instrument support (3) and a linear sliding table (2) used for guiding and driving the magnetic steel component (5) to slide along the length direction of a frame (1).

2. A magnetostrictive level gauge calibration device according to claim 1, characterized in that: the linear sliding table (2) comprises fixed seats (20) arranged at two ends of the linear sliding table (2), and a shell (21) which is fixedly connected between the two fixed seats (20) and is parallel to the length direction of the probe rod (41); a threaded lead screw (22) rotatably supported between the two fixed seats (20) and positioned inside the shell (21); a slide block (24) which is connected with the threaded lead screw (22) in a threaded manner; the servo motor (23) is fixedly connected to one end of the threaded lead screw (22) and is used for driving the threaded lead screw (22) to rotate; a guide groove (210) is formed in the shell (21); the upper end of the sliding block (24) protrudes out of the guide groove (210) of the shell (21) and is in sliding fit with the guide groove (210); the magnetic steel component (5) is arranged at one end of the sliding block (24) protruding out of the guide groove (210).

3. A magnetostrictive level gauge calibration device according to claim 1, characterized in that: a plurality of caulking grooves (30) which are distributed along the length direction of the instrument support (3) are formed in the instrument support; the caulking grooves (30) on the instrument supports (3) are in one-to-one correspondence; a probe rod (41) of the measured instrument (4) is embedded in the caulking groove (30); the magnetic steel component (5) comprises a transverse plate (50) fixed on the sliding block (24) and a plurality of magnetic steels (53) which are arranged on the transverse plate (50) and correspond to the embedding grooves (30) on the instrument bracket (3).

4. A magnetostrictive level gauge calibration device according to claim 3, characterized in that: a plurality of mounting holes (501) penetrating through the surface of the transverse plate (50) are formed in the vertical plate surface of the transverse plate (50); the magnetic steel component (5) further comprises a pin (52) penetrating through the mounting hole (501); the soft iron (51) is annular and sleeved at one end of the pin (52) which penetrates through the transverse plate (50); one end of the pin (52) departing from the soft iron (51) is a big end and is abutted with the transverse plate (50); the magnetic steel (53) is annular and is sleeved at one end of the pin (52) penetrating through the soft iron (51); the magnetic steel (53) is connected with the soft iron (51) and the pin (52) in an adsorption way.

5. A magnetostrictive level gauge calibration device according to claim 1, characterized in that: and a clamping component (7) for clamping the instrument to be tested (4) is arranged at one end of the instrument to be tested (4) on the frame (1).

6. A magnetostrictive liquid level gauge calibration device according to claim 5, characterized in that: the clamping assembly (7) comprises a mounting rack (70) fixedly connected to the frame (1); the clamping blocks (71) are fixedly connected to the mounting frame (70) and correspond to the measured instrument (4) one by one; the clamping plate (72) is arranged opposite to the clamping block (71) and is in sliding fit with the upper surface of the mounting frame (70), and the push rod (73) is used for driving the clamping plate (72) to slide on the mounting frame (70).

7. A magnetostrictive liquid level gauge calibration device according to claim 6, characterized in that: the surface of the clamping block (71) opposite to the clamping plate (72) is an inclined surface which inclines upwards.

8. A magnetostrictive level gauge calibration device according to claim 7, characterized in that: the mounting frame (70) and the clamping blocks (71) are provided with limiting sliding grooves (700) which extend towards the inclined surfaces of the clamping blocks (71) in a one-to-one correspondence manner; the clamping plates (72) are respectively embedded in the limiting sliding grooves, and the clamping plates (72) are in sliding fit with the limiting sliding grooves (700); one side of the clamping plate (72) positioned in the limiting sliding groove (700) is provided with a threaded through hole penetrating through the plate surface of the clamping plate (72); the push rod (73) is rotatably supported on the mounting frame (70); the periphery of the push rod (73) is provided with threads; the push rod (73) is arranged in the thread through holes of the clamping plates (72) in a penetrating way and is in threaded connection with the thread through holes of the clamping plates (72).

9. A magnetostrictive level gauge calibration device according to claim 1, characterized in that: the bottom of the frame (1) is provided with a supporting leg (8) for adjusting the height between the frame (1) and the ground; a containing hole (1100) is formed in the bottom of the frame (1) at a position corresponding to the supporting foot (8), and the containing hole (1100) is a threaded hole; the supporting foot (8) comprises a base (80); one end of the adjusting rod (82) is rotatably connected with the base (80) and the other end is in threaded connection with the accommodating hole (1100).

10. A magnetostrictive level gauge calibration device according to claim 9, characterized in that: the base (80) is in a circular truncated cone shape; a shaft hole (800) is formed in the small end face of the base (80) along the axis direction of the base (80), and an installation groove (801) communicated with the shaft hole (800) is formed in the large end face of the base (80); a limiting ring (820) is coaxially arranged at one end of the adjusting rod (82) deviating from the accommodating hole (1100); a shaft lever (821) with smooth periphery is coaxially arranged on one surface of the limiting ring (820) departing from the limiting rod; the shaft lever (821) is inserted into the shaft hole (800) of the base (80) and is in running fit with the shaft hole (800); the limiting ring (820) is abutted against the small end face of the base (80); a threaded part (83) is coaxially arranged at one end of the shaft rod (821) departing from the limiting ring (820); the outer diameter of the threaded part (83) is smaller than that of the shaft rod (821); a limit nut (84) is screwed on the thread part (83).

Images