CN116197154A

CN116197154A - Grit moisture content detector sensor cleaning device

Info

Publication number: CN116197154A
Application number: CN202310492792.8A
Authority: CN
Inventors: 王军; 孙述光; 于昭; 张先鹏; 段德尧
Original assignee: Qingdao Hehui Concrete Engineering Co ltd
Current assignee: Qingdao Hehui Concrete Engineering Co ltd
Priority date: 2023-05-05
Filing date: 2023-05-05
Publication date: 2023-06-02
Anticipated expiration: 2043-05-05
Also published as: CN116197154B

Abstract

The invention relates to the technical field of sand and stone moisture content detection, and discloses a sensor cleaning device of a sand and stone moisture content detector, which comprises a frame, wherein a detector body is arranged on the frame, a cleaning ring attached to the side wall of the sensor is sleeved on the sensor of the detector body, a driving mechanism is arranged on the frame and comprises a guide rod, a lead screw, a fixed seat, a movable seat, a connecting rod and a driving motor, the guide rod is vertically fixed above the frame, the lead screw is rotationally connected above the frame and parallel to the guide rod, the fixed seat is fixed at the upper end of the guide rod, the lead screw passes through the movable seat and is in threaded connection with the movable seat, the guide rod passes through the movable seat and is in sliding fit with the movable seat, the driving motor is fixed on the fixed seat and is fixed with one end of the lead screw, one end of the connecting rod is connected with the movable seat, and the other end of the connecting rod is connected with the cleaning ring. The invention has the effects of automatically cleaning the sensor of the water content detector in time and improving the working efficiency.

Description

Grit moisture content detector sensor cleaning device

Technical Field

The invention relates to the technical field of sand and stone water content detection, in particular to a sensor cleaning device of a sand and stone water content detector.

Background

In the process of stirring concrete, the materials such as cementing materials, sand and stones, additives and the like can be accurately measured, the deviation is small, the influence on the quality of the concrete is small, but the water content of the sand and stones is influenced by the supply of a cargo source, the storage mode and the season and climate, and the influence on the unilateral water consumption of the concrete is large in the production process.

In order to accurately detect the water content of sand, a water content detector is generally adopted in the prior art for detection. The detector adopts the high frequency principle, digital display, a sensor and a main body are integrated into a whole, and a plurality of gears are arranged for measuring the moisture of the sand and stone. When in use, the probe part of the sensor is inserted into the sand and fully contacted with the measured object.

However, in the process of implementing the related technical scheme, at least the following technical problems are found: because the grit contains certain moisture, the surface of sensor is by the adhesion of the viscidity material in the grit easily, influences the accuracy that the moisture content detected, but when carrying out the moisture content to the grit material that is located on the conveyer belt and detecting, if the surface adhesion too much impurity of sensor, then need the conveyer of transmission grit material need stop work, through the manual work detector of taking out, detects the surface of sensor, greatly reduced the work efficiency in the whole working process.

Disclosure of Invention

According to the sensor cleaning device for the sand and stone moisture content detector, the problem that the surface of the sensor is easy to adhere to sticky substances in sand and stone due to the fact that certain moisture is contained in sand and stone in the prior art is solved, the accuracy of moisture content detection is affected, but when moisture content detection is carried out on sand and stone materials on a conveying belt, if excessive impurities are adhered to the surface of the sensor, the conveying device for conveying the sand and stone materials is required to stop working, the detector is taken out manually to detect the surface of the sensor, the working efficiency in the whole working process is greatly reduced, and the sensor of the moisture content detector is automatically cleaned in time, so that the working efficiency is improved.

The invention provides a sensor cleaning device of a sand and stone moisture content detector, which comprises a frame, wherein the frame is positioned on a conveying device for conveying sand and stone materials, a detector body is arranged on the frame, a cleaning ring attached to the side wall of the sensor is sleeved on the sensor of the detector body, a driving mechanism is arranged on the frame and comprises a guide rod, a lead screw, a fixed seat, a movable seat, a connecting rod and a driving motor, the guide rod is vertically fixed above the frame, the lead screw is rotationally connected above the frame and parallel to the guide rod, the fixed seat is fixed at the upper end of the guide rod, the lead screw penetrates through the movable seat and is in threaded connection with the movable seat, the guide rod penetrates through the movable seat and is in sliding fit with the movable seat, the driving motor is fixed on the fixed seat and is fixed with one end of the lead screw, one end of the connecting rod is connected with the movable seat, and the other end of the connecting rod is connected with the cleaning ring.

Further, the clearance ring is the ring-shaped structure that two semi-rings splice and form, the connecting rod interval is provided with two, and the lower extreme of two connecting rods all articulates there is a movable rod, the other end and the semi-ring of movable rod are connected, the articulated shaft department of movable rod is provided with the torsional spring, be provided with the separate brake mechanism of drive two semi-rings in the frame.

Further, the braking mechanism comprises a separation column and a braking block, wherein the separation column is vertically arranged below the frame and is in sliding fit with one side opposite to the two connecting rods, the lower end of the separation column is provided with a tip with a triangular section, and the braking block is arranged on one side of the movable rod and is in sliding fit with the inclined plane of the tip.

Further, the opposite sides of the separation column are provided with saw tooth grooves, one end of the brake block is in plug-in fit with the saw tooth grooves, the section of the brake block is triangular, one edge of the brake block is fixed with the position of the movable rod, which is close to the connecting rod, and the distance between the end part of the brake block inserted into the saw tooth grooves and the movable rod is larger than the groove depth of the saw tooth grooves.

Further, be provided with the cover in the frame and locate the sensor outside of detector body, the upper and lower both ends of protection casing run through the setting, be provided with the mobile mechanism that drives the protection casing and go up and down in the frame.

Further, the protection casing includes first V-arrangement piece, second V-arrangement piece and two connection pieces, the opening of first V-arrangement piece and second V-arrangement piece sets up in opposite directions, the both ends of first V-arrangement piece are connected with one side of two connection pieces respectively, the both ends of second V-arrangement piece are connected with the opposite side of two connection pieces respectively.

Further, the moving mechanism comprises a moving cylinder, a moving seat and a mounting rod, wherein the moving cylinder is fixed on the frame, the moving seat is connected with the end part of a piston rod of the moving cylinder, one end of the mounting rod is connected with the moving seat, and the other end of the mounting rod is connected with the protective cover.

Further, the installation pole is provided with a plurality ofly along the circumference of protection casing, the upper end of installation pole articulates there is first branch, first branch articulates with the movable seat.

Further, remove the seat and include the first plate body, second plate body and the third plate body that are parallel to each other, first plate body and third plate body pass through dead lever fixed connection, the second plate body activity sets up between first plate body and third plate body, the second plate body is fixed through connecting spring with the third plate body, the piston rod of removing the cylinder passes first plate body and is fixed with the second plate body, first branch is articulated with the lateral wall of first plate body.

Further, the up end of second plate body is fixed with a plurality of mount pads, be provided with horizontally fixed column on the mount pad, one side of installation pole articulates there is the second branch, the bar groove that sets up along length direction is seted up to the lateral wall of second branch, the fixed column pass bar groove and with bar groove sliding fit, first branch and second branch are parallel to each other, the installation pole is parallel to each other with the dead lever.

The technical scheme provided by the invention has at least the following technical effects or advantages:

1. due to the adoption of the driving mechanism, after the sensor of the detector body is used for a period of time, the automatic driving cleaning ring descends, and the peripheral side wall of the sensor is cleaned, so that the problem that the surface of the sensor is easily adhered by viscous substances in sand and stone due to the fact that certain moisture is contained in the sand and stone in the prior art, the accuracy of water content detection is affected is effectively solved, and the sensor of the water content detector is automatically cleaned in time, and the working efficiency is improved.

2. Due to the adoption of the braking mechanism, after the cleaning ring is lifted, the cleaning ring can be detached, the inner side wall of the cleaning ring is cleaned conveniently, the problem that the cleaning ring is not easy to clean due to the fact that the cleaning ring is always attached to a sensor is solved, and further the cleaning ring is convenient to disassemble, and impurities adhered to the cleaning ring can be treated timely.

Drawings

FIG. 1 is a schematic overall structure of an embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating the working state of a cleaning device according to an embodiment of the present invention;

FIG. 3 is a schematic view illustrating a retracted state of the cleaning device according to an embodiment of the present invention;

FIG. 4 is an enlarged schematic view of FIG. 3 at A;

FIG. 5 is an enlarged schematic view at B in FIG. 1;

in the figure: 1. a frame; 2. a transfer device; 3. a detector body; 4. cleaning the ring; 5. a driving mechanism; 51. a guide rod; 52. a screw rod; 53. a fixing seat; 54. a movable seat; 55. a connecting rod; 56. a driving motor; 57. a movable rod; 6. a braking mechanism; 61. a partition column; 62. a brake block; 63. a tip; 64. sawing tooth grooves; 7. a protective cover; 71. a first V-shaped piece; 72. a second V-shaped piece; 73. a connecting sheet; 74. a ball; 8. a moving mechanism; 81. a moving cylinder; 82. a movable seat; 821. a first plate body; 822. a second plate body; 823. a third plate body; 824. a connecting spring; 83. a mounting rod; 84. a first strut; 85. a second strut; 851. a bar-shaped groove; 86. a mounting base; 87. fixing the column; 88. a fixed rod; 9. an auxiliary brush; 91. a first vertical rod; 92. and a second vertical rod.

Detailed Description

The embodiment of the invention discloses a sensor cleaning device of a sand and water content detector, which is characterized in that a cleaning ring 4 is sleeved outside a sensor, the cleaning ring 4 is automatically driven to reciprocate after the sensor of a detector body 3 is used for a period of time, the peripheral side wall of the sensor is cleaned, the sensor of the water content detector is automatically cleaned in time, and the working efficiency is improved.

In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.

Referring to fig. 1 and 2, a sensor cleaning device for a sand moisture content detector comprises a frame 1, wherein the frame 1 can be erected on a conveying device 2 for conveying sand. Is detachably connected with the conveying device 2 for conveying sand and stone through bolts. The conveyer 2 is belt conveyor, installs detector body 3 in frame 1, including the sensor on the detector body 3, during the use, lay the grit on the belt, need aim at the belt top with the tip of sensor to can make the sensor peg graft in the grit. The cleaning ring 4 is sleeved on the sensor of the detector body 3, the cleaning ring 4 can slide along the axial direction of the sensor, and impurities adhered to the surface of the sensor are cleaned. A drive mechanism 5 is mounted on the frame 1, the drive mechanism 5 being capable of being used to drive the cleaning ring 4 in a vertical movement. The cleaning ring 4 is a circular ring structure formed by splicing two semi-rings, and fine bristles are adhered and fixed on the inner side wall of the cleaning ring 4.

Referring to fig. 1, 3 and 4, the driving mechanism 5 includes a guide rod 51, a screw rod 52, a fixed seat 53, a movable seat 54, a connecting rod 55 and a driving motor 56, the guide rod 51 is vertically fixed above the frame 1, the screw rod 52 is rotatably connected above the frame 1 and parallel to the guide rod 51, the guide rod 51 and the screw rod 52 are respectively located at two sides of the detector body 3, the fixed seat 53 is fixed at the upper end of the guide rod 51, and one end of the fixed seat 53 extends above the screw rod 52. The upper end of the screw rod 52 is rotatably connected with a fixed seat 53. The lead screw 52 passes through the movable seat 54 and is in threaded connection with the movable seat 54, and the guide rod 51 passes through the movable seat 54 and is in sliding fit with the movable seat 54. The movable seat 54 is parallel to the fixed seat 53. The driving motor 56 is fixed on the fixed seat 53, the output shaft of the driving motor 56 is fixed with one end of the screw rod 52, one end of the connecting rod 55 is connected with the movable seat 54, and the other end is connected with the cleaning ring 4. The connecting rods 55 are arranged at intervals, the lower ends of the two connecting rods 55 are hinged with a movable rod 57, the movable rod 57 is L-shaped, the vertical end of the movable rod 57 is hinged with the connecting rods 55, and the horizontal end of the movable rod 57 is fixedly connected with the semi-rings. The hinge shaft of the movable rod 57 is provided with a torsion spring, specifically, the upper end of the vertical end of the movable rod 57 is fixed with a shaft, the lower end of the connecting rod 55 is fixed with two hanging lugs, and two ends of the shaft are inserted between the two hanging lugs and are in running fit with the hanging lugs. The torsional spring is sleeved on the shaft, and the two ends of the torsional spring are respectively fixed with the connecting rod 55 and the movable rod 57, so that the two movable rods 57 are kept parallel, namely the vertical parts of the connecting rod 55 and the movable rod 57 are positioned on the same vertical line, and further the two semi-rings are mutually spliced to form a circular ring, and the circular ring is sleeved outside the sensor to clean the outer surface of the sensor.

Referring to fig. 3 and 4, a braking mechanism 6 is mounted on the frame 1 for driving the two half-rings apart, without coming into contact with the outer surface of the sensor. The brake mechanism 6 comprises a separation column 61 and a brake block 62, the separation column 61 is vertically fixed below the frame 1, and one opposite sides of the two connecting rods 55 are respectively in sliding fit with two opposite sides of the separation column 61, and the lower end of the separation column 61 is higher than the lower end of the sensor and is close to the lower side of the frame 1. A tip 63 having a triangular cross section is fixed to the lower end of the partition column 61, and a stopper 62 is fixedly installed at one side of the movable rod 57 and slidably engaged with the inclined surface of the tip 63. The section of the brake block 62 is in a regular triangle shape, one side of the brake block 62 is fixedly connected with one side of the movable rod 57 close to the partition column 61, and the brake block 62 is close to the hinge joint of the movable rod 57 and the connecting rod 55. When the movable rod 57 does not correspond to the partition column 61, that is, when the movable rod 57 is located below the partition column 61, the two brake blocks 62 are located below the partition column 61, and under the action of the torsion springs connected at the positions of the movable rod 57 and the connecting rod 55, the two movable rods 57 can be made to be parallel to each other, and one ends of the two brake blocks 62 opposite to each other are symmetrically arranged with respect to the partition column. The opposite sides of the two separation columns 61 are provided with saw tooth grooves 64, and one end of the brake block 62 is in plug-in fit with the saw tooth grooves 64. The height of the brake block 62 is larger than the groove depth of the sawtooth groove 64, that is, the distance between the end of the brake block 62 inserted into the sawtooth groove 64 and the movable rod 57 is larger than the groove depth of the sawtooth groove 64. When the brake block 62 is inserted into the sawtooth groove 64, the distance between the upper ends of the two movable rods 57 is smaller than the distance between the lower ends of the two movable rods 57. The serration grooves 64 are continuous triangular grooves having a cross section at an angle greater than the angle of the end of the brake block 62 adjacent to the serration grooves 64. When the driving mechanism 5 drives the cleaning ring 4 to rise to the partition column 61, as the brake block 62 is abutted by the partition column 61, the movable rod 57 turns over to one side far away from the partition column 61 by taking the shaft as the center, and then the two semi-rings can be driven to be separated, the inner wall of the cleaning ring 4 is not contacted with the outer side wall of the sensor, and the influence on the detection of the sensor is reduced. When the brake block 62 passes through the saw tooth groove 64, the brake block 62 slides along the inclined surface of the groove body when the connecting rod 55 continues to ascend because the height of the brake block 62 is larger than the groove depth of the saw tooth groove 64, and the movable rod is pulled upwards because the groove body is shallower relative to the brake block 62, so that the brake block 62 slides out along the inclined surface of the groove body. When the connecting rod 55 is continuously moved, the brake block 62 can be pulled to enter another groove body, under the action of the torsion spring on the hinge shaft of the connecting rod 55 and the movable rod 57, the brake block 62 can be instantly inserted into the other groove body, when the brake block 62 is inserted into the groove body, the two movable rods 57 are close to each other, when the brake block 62 is separated from the groove body, the two movable rods 57 are far away from each other, the brake block 62 is abutted with the side wall of the separation column 61 due to the torsion spring at the end part of the movable rod 57, the movable rod 57 is continuously driven to be in a lifting process, when the saw tooth groove 64 is passed, the distance between the movable rod 57 and the saw tooth groove 64 is changed, when the torsion spring at the end part of the movable rod 57 is utilized, and when one groove body is moved to the other groove body, the movable rod 57 hits the side wall of the separation column 61 to vibrate, the semi-ring can shake, impurities adhered to the inner side of the cleaning ring 4 are reduced, and the surface of the sensor can be cleaned better next time. When the two movable levers 57 are away from the partition post 61, the opposite ends of the two brake blocks 62 abut against each other, and the two movable levers 57 are parallel to each other.

Referring to fig. 1, 3 and 5, the frame 1 is provided with the protective cover 7, so that when the surface of the sensor is cleaned, a large amount of sand and stones are blocked temporarily and are enclosed on the surface of the sensor, and the surface of the sensor is cleaned conveniently. The upper and lower both ends of protection casing 7 run through the setting, and the lower terminal surface rotation of protection casing 7 is connected with a plurality of balls 74, and a plurality of balls 74 evenly arrange along the circumference of protection casing 7, when the sensor outside was located to the protection casing 7 cover, can roll the cooperation with the surface of conveyer belt, reduce frictional force. The protection cover 7 comprises a first V-shaped piece 71, a second V-shaped piece 72 and two connecting pieces 73, openings of the first V-shaped piece 71 and the second V-shaped piece 72 are arranged in opposite directions, two ends of the first V-shaped piece 71 are respectively connected with one sides of the two connecting pieces 73, and two ends of the second V-shaped piece 72 are respectively connected with the other sides of the two connecting pieces 73. The opening of the first V-shaped piece 71 is larger than the opening of the second V-shaped piece 72, so that when the conveying device 2 drives sand and stone to move from the input end to the output end, part of sand and stone can be quickly pulled out, the sensor is covered in the protective cover 7, the surface of the sensor is convenient to clean, when the conveying device 2 drives sand and stone to continuously advance, the pulled-out sand and stone advances along the outer side wall of the protective cover 7, and because the opening of the second V-shaped piece 72 is smaller, the sand and stone can be quickly gathered together, and excessive accumulation of sand and stone is reduced. The first V-shaped piece 71, the second V-shaped piece 72 and the connecting piece 73 have certain elasticity, the elasticity of the connecting piece 73 is larger than the elasticity of the first V-shaped piece 71 and the second V-shaped piece 72, specifically, the first V-shaped piece 71 and the second V-shaped piece 72 are made of plastic materials, and the connecting piece 73 is made of rubber materials.

Referring to fig. 1, 3 and 5, a moving mechanism 8 is mounted on the frame 1 and is used for driving the protective cover 7 to move vertically, so that the protective cover can move to the highest position when the sensor works, and the protective cover descends and covers the sensor when the sensor needs cleaning. The moving mechanism 8 comprises a moving cylinder 81, a moving seat 82 and a mounting rod 83, wherein the moving cylinder 81 is fixed on the frame 1, the moving seat 82 is connected with the end part of a piston rod of the moving cylinder 81, the moving seat 82 is positioned on one side of the sensor, one end of the mounting rod 83 is connected with the moving seat 82, and the other end of the mounting rod 83 is connected with the protective cover 7. The mounting rod 83 is provided with a plurality of along the circumference of protection casing 7, and the upper end of mounting rod 83 articulates has first branch 84, and first branch 84 articulates with the removal seat 82. The movable seat 82 comprises a first plate 821, a second plate 822 and a third plate 823 which are parallel to each other, the first plate 821 and the third plate 823 are fixedly connected through a fixing rod 88, the second plate 822 is movably arranged between the first plate 821 and the second plate 822, the second plate 822 and the third plate 823 are fixed through a connecting spring 824, a piston rod of the movable cylinder 81 penetrates through the first plate 821 and is fixed with the second plate 822, and the first supporting rod 84 is hinged with the side wall of the first plate 821. The up end of second plate 822 is fixed with a plurality of mount pads 86, is provided with horizontally fixed column 87 on the mount pad 86, and one side of installation pole 83 articulates there is second branch 85, and the bar groove 851 that sets up along length direction is seted up to the lateral wall of second branch 85, and fixed column 87 passes bar groove 851 and with bar groove 851 sliding fit, first branch 84 and second branch 85 are parallel to each other, and installation pole 83 is parallel to each other with dead lever 88. Specifically, a plurality of accommodating grooves are formed in the peripheral side walls of the first plate body 821 and the third plate body 823, the accommodating grooves in the first plate body 821 and the accommodating grooves in the third plate body 823 are arranged in a one-to-one correspondence mode, and the number of the accommodating grooves is identical to that of the first supporting rods 84. A through groove is formed in one side of the fixing rod 88, which is close to the mounting rod 83, and is arranged along the vertical direction, the through groove penetrates through the other side of the fixing rod 88, and the bottom of the through groove penetrates through the lower end of the fixing rod 88 and corresponds to the accommodating groove on the third plate 823. One end of the first support rod 84, which is far away from the mounting rod 83, is hinged in a receiving groove in the first plate 821, and the end of the second support rod 85 is hinged in the through groove. When the moving cylinder 81 lifts the moving seat 82, the second plate 822 approaches the first plate 821, the fixing column 87 slides along the length direction of the bar slot 851 to the side of the bar slot 851 far away from the mounting rod 83, at this time, the included angle between the first support rod 84 and the mounting rod 83 is maximum, the distance between the mounting rod 83 and the fixing rod 88 is shortened to the minimum in the horizontal direction, and the plurality of mounting rods 83 are horizontally displaced inwards so that the connecting sheet 73 is folded, together with the whole protective cover 7, to shrink inwards. When the moving cylinder 81 stretches out, the balls 74 at the bottom of the protective cover 7 are in rolling contact with the upper part of the belt, the second plate 822 is abutted against the third plate 823 to drive the whole body to descend, the connecting spring 824 is compressed, the included angle between the first support rod 84 and the mounting rod 83 is gradually reduced, the horizontal distance between the mounting rod 83 and the fixing rod 88 is maximum when the angle is 90 degrees, and the mounting rod 83 drives the protective cover 7 to be unfolded to the maximum. Two first vertical rods 91 are fixedly arranged below the frame 1, and the two first vertical rods 91 are respectively positioned at two sides of the width direction of the protective cover 7 and are arranged at intervals with the protective cover 7. The lower extreme of first montant 91 articulates there is second montant 92, and the articulated shaft department of second montant 92 is provided with the torsional spring that drive first montant 91 and second montant 92 are located same vertical line. The lower extreme of second montant 92 is fixed with supplementary brush 9, and supplementary brush 9's shape and the lateral wall looks adaptation of protection casing 7, and one side of supplementary brush 9 is fixed with the brush hair with the lateral wall looks adaptation of protection casing 7. When protection casing 7 promotes to the eminence, the width of protection casing 7 is minimum, and two supplementary brush 9 laminate with the both sides of protection casing 7 respectively, after protection casing 7 continued to rise to extreme position, supplementary brush 9 remove to the below of protection casing 7 along the direction of height of protection casing 7, can clean the lateral wall of protection casing 7. When the shield 7 descends, the mounting rod 83 opens to abut against the auxiliary brush 9, so that the auxiliary brush 9 is turned to a side away from the shield 7.

The working principle of the embodiment of the invention is as follows: when the sensor of detecting the body needs to be cleaned, the protective cover 7 can be driven to descend through the movable air cylinder 81, the protective cover is arranged on the outer side of the sensor, the cleaning ring 4 is driven to descend through the driving mechanism 5, the cleaning ring 4 is sleeved on the outer side of the sensor and moves back and forth along the height direction of the sensor, and the surface of the sensor is cleaned rapidly.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to apply equivalents and modifications according to the technical scheme and the concept of the present invention within the scope of the present invention.

Claims

1. The utility model provides a grit moisture content detector sensor cleaning device, includes frame (1), frame (1) is located conveyer (2) of carrying the grit material, be provided with detector body (3) on frame (1), a serial communication port, the cover is equipped with clearance ring (4) with sensor lateral wall laminating on the sensor of detector body (3), be provided with actuating mechanism (5) on frame (1), actuating mechanism (5) include guide bar (51), lead screw (52), fixing base (53), movable seat (54), connecting rod (55) and driving motor (56), guide bar (51) are vertical to be fixed in frame (1) top, lead screw (52) swivelling joint in frame (1) top and with guide bar (51) parallel, fixing base (53) are fixed in guide bar (51) upper end, lead screw (52) pass movable seat (54) and with movable seat (54) threaded connection, guide bar (51) pass movable seat (54) and with movable seat (54) sliding fit, drive motor (55) are fixed in fixed with one end of guide bar (52) on fixed seat (54), the other end is connected with the cleaning ring (4).

2. The sensor cleaning device for the sand and stone moisture content detector according to claim 1, wherein the cleaning ring (4) is of a circular ring structure formed by splicing two semi-rings, two connecting rods (55) are arranged at intervals, the lower ends of the two connecting rods (55) are hinged with a movable rod (57), the other end of the movable rod (57) is connected with the semi-rings, a torsion spring is arranged at the hinge shaft of the movable rod (57), and a braking mechanism (6) for driving the two semi-rings to be separated is arranged on the frame (1).

3. A sand moisture content detector sensor cleaning device as claimed in claim 2, characterized in that the brake mechanism (6) comprises a separation column (61) and a brake block (62), the separation column (61) is vertically arranged below the frame (1) and is in sliding fit with one side opposite to the two connecting rods (55), a tip (63) with a triangular section is arranged at the lower end of the separation column (61), and the brake block (62) is arranged on one side of the movable rod (57) and is in sliding fit with an inclined plane of the tip (63).

4. A sand moisture content detector sensor cleaning device as claimed in claim 3, characterized in that the opposite sides of the separation column (61) are provided with saw tooth grooves (64), one end of the brake block (62) is in plug-in fit with the saw tooth grooves (64), the section of the brake block (62) is triangular, one side is fixed with the movable rod (57) at a position close to the connecting rod (55), and the distance between the end of the brake block (62) plugged in the saw tooth grooves (64) and the movable rod (57) is larger than the groove depth of the saw tooth grooves (64).

5. The sensor cleaning device for the sand and stone moisture content detector according to claim 1, wherein a protective cover (7) sleeved on the outer side of the sensor of the detector body (3) is arranged on the frame (1), the upper end and the lower end of the protective cover (7) are arranged in a penetrating mode, and a moving mechanism (8) for driving the protective cover (7) to lift is arranged on the frame (1).

6. The sensor cleaning device for the sand and stone moisture content detector according to claim 5, wherein the protective cover (7) comprises a first V-shaped piece (71), a second V-shaped piece (72) and two connecting pieces (73), openings of the first V-shaped piece (71) and the second V-shaped piece (72) are arranged in opposite directions, two ends of the first V-shaped piece (71) are respectively connected with one sides of the two connecting pieces (73), and two ends of the second V-shaped piece (72) are respectively connected with the other sides of the two connecting pieces (73).

7. The sensor cleaning device for the sand and stone moisture content detector according to claim 6, wherein the moving mechanism (8) comprises a moving cylinder (81), a moving seat (82) and a mounting rod (83), the moving cylinder (81) is fixed on the frame (1), the moving seat (82) is connected with the end part of a piston rod of the moving cylinder (81), one end of the mounting rod (83) is connected with the moving seat (82), and the other end of the mounting rod is connected with the protective cover (7).

8. The sensor cleaning device for the sand and stone moisture content detector according to claim 7, wherein a plurality of mounting rods (83) are arranged along the circumferential direction of the protective cover (7), a first supporting rod (84) is hinged to the upper end of each mounting rod (83), and the first supporting rod (84) is hinged to the movable seat (82).

9. The sensor cleaning device for the sand and stone moisture content detector according to claim 8, wherein the movable seat (82) comprises a first plate body (821), a second plate body (822) and a third plate body (823) which are parallel to each other, the first plate body (821) and the third plate body (823) are fixedly connected through a fixing rod (88), the second plate body (822) is movably arranged between the first plate body (821) and the third plate body (823), the second plate body (822) and the third plate body (823) are fixed through a connecting spring (824), a piston rod of the movable cylinder (81) penetrates through the first plate body (821) and is fixed with the second plate body (822), and the first support rod (84) is hinged with the side wall of the first plate body (821).

10. The sensor cleaning device for the sand and stone moisture content detector according to claim 9, wherein a plurality of mounting seats (86) are fixed on the upper end face of the second plate body (822), horizontal fixing columns (87) are arranged on the mounting seats (86), second supporting rods (85) are hinged to one sides of the mounting rods (83), strip-shaped grooves (851) arranged in the length direction are formed in the side walls of the second supporting rods (85), the fixing columns (87) penetrate through the strip-shaped grooves (851) and are in sliding fit with the strip-shaped grooves (851), the first supporting rods (84) and the second supporting rods (85) are parallel to each other, and the mounting rods (83) are parallel to the fixing rods (88).