A level detector

Abstract

The present invention discloses a level detector, which relates to the technical field of level detectors and includes two support plates, the bottom surfaces of which are fixedly connected with three threaded rods. Through the coordinated use of the detection component, the sleeve component and the clamping component, the entire detection component is kept in a horizontally supported and movable state to the right. In this way, under the action of the spring, the lower fixed plate is always pushed to drive the movable wheel at the lower end of the movable column to move linearly against the bridge deck. At the same time, the upper end of the movable column drives the displacement detector to form an undulating route formed by the movement of the bridge deck on the real-time tracking and drawing module in the control box. When the detection component moves to the right and is triggered by the right signal trigger, the signal is transmitted to the control box to form two signal points, thereby forming a straight line between the two points. The formed curve can then be used as a reference, thereby facilitating the detection of the flatness of the bridge deck and facilitating analysis and reference.

Description

Technical Field

[0001] The present invention relates to a detector, in particular to a level detector. Background Art

[0002] Currently, level testing is required during highway construction to control the flatness of bridge deck construction. Bridge deck flatness refers to the deviation in the longitudinal concavity and convexity of the bridge surface. Bridge deck flatness is an important indicator in bridge evaluation and bridge construction acceptance, and mainly reflects the flatness of the bridge deck longitudinal section curve. When the bridge deck longitudinal section curve is relatively smooth, it means that the bridge deck is relatively flat, or the flatness is relatively good. Otherwise, it means that the flatness is relatively poor. A good bridge deck requires good flatness.

[0003] Bridge deck smoothness measurements are mainly divided into two categories. One is a direct test method, which measures the longitudinal section, that is, the curve of the bridge deck slope, and then performs a mathematical analysis on the curve to determine whether it meets the smoothness index. The other method is to measure the mechanical reaction of vehicles passing on the bridge deck. Based on the mechanical reaction, mathematical analysis is performed to determine whether it is within the reasonable range of smoothness. These measurements require standard instruments to ensure accurate measurement results.

[0004] The patent number CN 216694973 U has been searched for a highway construction level detector. The present invention discloses a highway construction level detector, including a base, two bases are symmetrically arranged; screw rods are arranged in pairs, respectively vertically arranged on each base, with an adjustment handle at the upper end; guide rods, each base is provided with a pair; adjustment blocks are arranged in pairs, respectively sleeved on the screw rods and guide rods through threaded fitting; a disk is provided at the top of the guide rods and screw rods: a guide body, the first guide body and the third guide body are located at both ends, respectively connected to the adjustment block, the guide body has a guide rail and a slide, and the guide bodies are spliced ​​by a connecting piece; a detection body cooperates with the guide rail and the slide groove, slides relatively along the slide rail and the slide groove, has a retractable rod at the lower end, has a contact head at the lower end of the retractable rod, has a connector at the upper end of the detection body, and the retractable rod is connected to the displacement sensor; a support member is provided on each base, and a level tube is supported on the support member. It has the advantage of realizing accurate and reliable level detection of the highway;

[0005] The above-mentioned detector has the following problems: when in use, the horizontal tube is connected to the base through a support. How to adjust the two bases when they are not on the same horizontal plane of the bridge deck? How to use the detection body to measure the flatness of the bridge deck as a reference? Therefore, a level detector is needed to deal with this problem. Summary of the Invention

[0006] The object of the present invention is to provide a level detector to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a level detector, comprising two support plates, the bottom surfaces of the two support plates are fixedly connected with three threaded rods, the six threaded rods are respectively threadedly connected to the spiral holes one opened on the six adjusting cones, the upper surfaces of the two support plates are respectively connected to two adjusting components, the front side surface of the adjusting component on the right is connected to the fixing plate one, the fixing plate one is fixedly connected to the outer surface of the laser pen, the front side surface of the adjusting component on the left is connected to the positioning plate, the right support plate and the right adjusting component are respectively connected to two socket components, the left support plate and the left adjusting component are respectively connected to two clamping components, the two clamping components are respectively connected to two socket components, the two clamping components and the two socket components are all connected to the same detection component, and signal triggers are installed in the upper clamping component and the upper socket component.

[0008] As a preferred technical solution of the present invention, the two adjusting components each include two fixing columns, the lower ends of the two fixing columns are fixedly connected to the same support plate, the upper ends of the two fixing columns are fixedly connected to the bottom surface of the lifting plate, the lifting plate is threadedly connected to the screw rod through the opened spiral hole 2, the lower end of the screw rod is rotatably connected to the same support plate through a bearing, the upper end of the screw rod is fixedly connected to the turntable, and the two adjacent vertical sides of the lifting plate are fixedly connected with two fixing plates 2, the four fixing plates 2 are grouped in twos and the two groups are respectively fixedly connected to the two horizontal tubes, wherein the front side surface of the left lifting plate is fixedly connected to the positioning plate, and the front side surface of the right lifting plate is fixedly connected to the fixing plate 1.

[0009] As a preferred technical solution of the present invention, the two socket parts both include n-shaped plates, and the right sides of the two n-shaped plates are movably connected to the right support plate and the right lifting plate respectively through hinge seats. The two side plates of each n-shaped plate have opposite sides with socket holes opened on the left side, and the upper and lower sides of the four socket holes have clamping grooves. The two side plates of each n-shaped plate have opposite sides with clamping holes, and the four clamping holes are respectively communicated with the four socket holes. One of the signal triggers is installed on the inner left side of the upper n-shaped plate.

[0010] As a preferred technical solution of the present invention, the two clamping components both include movable plates, and the two movable plates are movably connected to the left support plate and the left lifting plate respectively through hinge seats. The right sides of the two movable plates are fixedly connected with two slide plates, and the four slide plates are respectively socketed with four socket holes. The four slide plates are grouped in twos and the right ends of the opposite sides of each group of two plates are fixedly connected with a clamping plate. The four clamping plates are all arranged in a T-shape, and the four clamping plates are respectively socketed with four clamping holes. Another signal trigger is installed on the right side of the upper movable plate.

[0011] As a preferred technical solution of the present invention, the detection component includes two movable plates, and the front and rear ends of the two movable plates are respectively slidably connected to the slide grooves on the four slide plates, and the left and right ends of the two movable plates are fixedly connected with connectors, and each of the connectors is respectively socketed with the slide grooves on the corresponding slide plates, and the upper and lower surfaces of the two movable plates are fixedly connected to two sliding plates, and the eight sliding plates are respectively socketed with eight clamping grooves, and the lower movable plate is fixedly connected to the outer surface of the fixed cylinder, and the fixed cylinder is socketed with the movable column, and two fixed plates are fixedly connected to the movable column, and the two fixed plates are respectively located on the upper and lower sides of the lower movable plate.

[0012] As a preferred technical solution of the present invention, the fixed disk on the lower side is fixedly connected to the lower end of the spring, the spring is sleeved on the moving column, the upper end of the spring is fixedly connected to the bottom surface of the fixed cylinder, the upper end of the moving column is connected to the displacement detector, the displacement detector is installed on the bottom surface of the upper moving plate, the left sides of the two moving plates are fixedly connected to the same telescopic plate, and a control box is installed on the upper surface of the upper moving plate, the control box is bidirectionally electrically connected to the displacement detector, and the input end of the control box is electrically connected to the output end of the two signal triggers.

[0013] As a preferred technical solution of the present invention, a real-time route tracking and drawing module is provided in the control box, and the real-time route tracking and drawing module includes receiving signals from two signal triggers to automatically form a two-point straight line baseline, and forming a curve in real time on the moving route when the displacement detector moves for detection.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention cooperates with the provided adjusting component, threaded rod, and adjusting cone to rotate the adjusting cone, which rotates and moves along the threaded rod, thereby causing the threaded rod to drive the support plate to be adjusted horizontally. The horizontal adjustment can be performed based on the observation of the two vertical horizontal tubes on the adjusting component. By rotating the turntable, the turntable drives the screw rod to rotate, and the rotating screw rod drives the lifting plate to be adjusted up and down, so that the two lifting plates drive the upper sleeve component and the clamping component to drive the detection component to perform corresponding stretching adjustment, so that the telescopic plate on the detection component can be adjusted accordingly, which can facilitate the detection of bridge decks with different slopes.

[0016] 2. The present invention cooperates with the detection component, the sleeve component and the clamping component to stretch the clamping component or the sleeve component, so as to adjust the length of the stretched detector, so as to facilitate the use of bridge decks of different widths. During the stretching adjustment, the slide plate on the clamping component slides along the sleeve hole, and the clamping plate on the slide plate slides and adjusts in the clamping hole, so that the n-shaped plate and the slide plate can slide and adjust the length, and then the detection can be carried out. The telescopic plate can be pulled to move to the left, so that the telescopic plate drives the entire detection component to first trigger the signal on the left side to generate a signal that is transmitted to the control box to form a point, and then the telescopic plate is pulled to move to the right, and at the same time drives the moving When the moving plate slides out of the slide plate, the sliding plate on the moving plate is stuck in the card slot, so that the entire detection component is still in a horizontally supported moving state to the right. In this way, under the action of the spring, the lower fixed plate can always be pushed to drive the moving wheel at the lower end of the moving column to move in a straight line against the bridge deck. At the same time, the upper end of the moving column drives the displacement detector to form an undulating route formed by the movement of the bridge deck on the real-time tracking and drawing module in the control box to form a curve. When the detection component moves to the right and is triggered by the signal trigger on the right, the signal is transmitted to the control box to form two signal points, thereby forming a straight line between the two points. The formed curve can then be used as a reference, which is convenient for detecting the flatness of the bridge deck and for analysis and reference. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic structural diagram of the regulating component of the present invention;

[0019] Figure 3 It is a schematic structural diagram of the socket component of the present invention;

[0020] Figure 4 It is a schematic structural diagram of the clamping component of the present invention;

[0021] Figure 5 It is a schematic structural diagram of the detection component of the present invention.

[0022] In the figure: 1 support plate, 2 threaded rod, 3 adjusting cone, 4 adjusting component, 41 fixed ball, 42 lifting plate, 43 screw rod, 44 turntable, 45 fixed plate 2, 46 horizontal tube, 5 sleeve component, 51n-shaped plate, 52 sleeve hole, 53 clamping groove, 54 clamping hole, 6 clamping component, 61 movable plate, 62 slide plate, 63 clamping plate, 7 detection component, 71 moving plate, 72 joint, 73 sliding plate, 74 fixed cylinder, 75 moving column, 76 fixed plate, 77 spring, 78 moving wheel, 79 displacement detector, 710 connecting plate, 711 control box, 8 fixed plate 1, 9 laser pen, 10 positioning plate, 11 signal trigger. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-5 The present invention provides a technical solution of a level detector: it includes two support plates 1, and the bottom surfaces of the two support plates 1 are fixedly connected with three threaded rods 2. The six threaded rods 2 are respectively threadedly connected to the spiral holes 1 opened on the six adjusting cones 3. When the adjusting cones 3 are rotated, the adjusting cones 3 rotate and move along the threaded rods 2, so that the threaded rods 2 drive the support plates 1 to adjust the level, thereby adjusting the two adjusting components 4 to the same horizontal plane for easy detection. The upper surfaces of the two support plates 1 are respectively connected to the two adjusting components 4, the front side of the right adjusting component 4 is connected to the fixing plate 1 8, the fixing plate 1 8 is fixedly connected to the outer surface of the laser pen 9, the front side of the left adjusting component 4 is connected to the positioning plate 10, the right support plate 1 and the right adjusting component 4 are respectively connected to the two socket components 5, the left support plate 1 and the left adjusting component 4 are respectively connected to the two clamping components 6, the two clamping components 6 are respectively connected to the two socket components 5, the two clamping components 6 and the two socket components 5 are all connected to the same detection component 7, and a signal trigger 11 is installed in the upper clamping component 6 and the upper socket component 5.

[0025] The two adjusting components 4 each include two fixing columns 41, the lower ends of the two fixing columns 41 are fixedly connected to the same support plate 1, the upper ends of the two fixing columns 41 are fixedly connected to the bottom surface of the lifting plate 42, the lifting plate 42 is threadedly connected to the screw rod 43 through the second spiral hole opened, the lower end of the screw rod 43 is rotatably connected to the same support plate 1 through a bearing, and the upper end of the screw rod 43 is fixedly connected to the turntable 44. By rotating the turntable 44, the turntable 44 drives the screw rod 43 to rotate, and the rotating screw rod 43 drives the lifting plate 42 to adjust up and down, so that the two lifting plates 4 2 drives the upper sleeve component 5 and the clamping component 6 to drive the detection component 7 to perform corresponding stretching adjustment, so that the telescopic plate 710 on the detection component 7 can be adjusted accordingly, which can facilitate the detection of bridge decks with different slopes. The two adjacent vertical side surfaces of the lifting plate 42 are fixedly connected with two fixing plates 2 45. The four fixing plates 2 45 are grouped in pairs and the two groups are respectively fixedly connected to the two horizontal tubes 46. The front side surface of the left lifting plate 42 is fixedly connected to the positioning plate 10, and the front side surface of the right lifting plate 42 is fixedly connected to the fixing plate 1 8.

[0026] The two socket components 5 both include an n-shaped plate 51, and the right sides of the two n-shaped plates 51 are movably connected to the right support plate 1 and the right lifting plate 42 through a hinge seat respectively. The two side plates of each n-shaped plate 51 have a socket hole 52 with a left opening on the opposite sides, and the upper and lower sides of the four socket holes 52 have a snap-in groove 53. The two side plates of each n-shaped plate 51 have a snap-in hole 54 on the opposite sides, and the four snap-in holes 54 are respectively communicated with the four socket holes 52. One of the signal triggers 11 is installed on the inner left side of the upper n-shaped plate 51. During stretching adjustment, the slide plate 62 on the snap-in component 6 slides along the socket hole 52, and the snap-in plate on the slide plate 62 is slid and adjusted in the snap-in hole 54, so that the n-shaped plate 51 and the slide plate 62 can slide and adjust the length, which is convenient for use in bridge decks of different widths.

[0027] The two clamping parts 6 both include a movable plate 61, and the two movable plates 61 are movably connected to the left support plate 1 and the left lifting plate 42 through a hinge seat respectively. The right sides of the two movable plates 61 are fixedly connected with two slide plates 62, and the four slide plates 62 are respectively socketed with the four socket holes 52. The four slide plates 62 are grouped in twos and the right ends of the opposite sides of each group of two are fixedly connected with a clamping plate 63. Through the set clamping plate 63, the socket part 5 and the clamping part 6 can be clamped and restricted, thereby preventing the clamping part 6 from sliding out of the socket part 5, thereby affecting the detection. The four clamping plates 63 are all set to a T-shape, and the four clamping plates 63 are respectively socketed with the four clamping holes 54. Another signal trigger 11 is installed on the right side of the upper movable plate 61.

[0028] The two ends of the two movable plates 71 are fixedly connected to the sliding grooves on the four sliding groove plates 62, and each connecting head 72 is respectively engaged with the sliding groove on the corresponding sliding groove plate 62. The upper and lower surfaces of the two movable plates 71 are fixedly connected to the two sliding plates 73. By setting the sliding plates 73, the movable plates 71 and the connecting heads 72, the clamping parts 6 and the sleeve parts 5 can be adjusted in length after the detection part 7 is stretched, thereby not affecting the detection part 7 to perform real-time bridge deck detection by moving. It is convenient for the eight sliding plates 73 to be respectively engaged with the eight engaging grooves 53, and the lower movable plate 71 is fixedly connected to the outer surface of the fixed cylinder 74, and the fixed cylinder 74 is engaged with the movable column 75. The movable column 75 is fixedly connected to two fixed plates 76, and the two fixed plates 76 are respectively located on the upper and lower sides of the lower movable plate 71.

[0029] The lower fixed plate 76 is fixedly connected to the lower end of the spring 77. Through the provided spring 77, the lower fixed plate 76 can be always pushed under the action of the spring 77 to drive the moving wheel 78 at the lower end of the moving column 75 to move linearly against the bridge deck, thereby facilitating the real-time detection of the linear flatness of the bridge deck by driving the displacement detector 79 through the moving column 75. The spring 77 is sleeved on the moving column 75, and the upper end of the spring 77 is fixedly connected to the bottom surface of the fixed cylinder 74. The upper end of the moving column 75 is connected to the displacement detector 79, and the displacement detector 79 is installed on the bottom surface of the upper moving plate 71. The left sides of the two moving plates 71 are fixedly connected to the same telescopic plate 710. The upper surface of the upper moving plate 71 is installed with a control box 711. The control box 711 is bidirectionally electrically connected to the displacement detector 79, and the input end of the control box 711 is electrically connected to the output end of the two signal triggers 11.

[0030] A real-time route tracking and drawing module is provided in the control box 711, and the real-time route tracking and drawing module includes receiving signals from two signal triggers 11 to automatically form a two-point straight line baseline, and forming a curve in real time on the moving route when the displacement detector 79 moves for detection. The upper end of the moving column 75 can drive the displacement detector 79 to form an undulating route formed by the movement of the bridge deck to form a curve on the real-time tracking and drawing module in the control box 711, which is convenient for reference.

[0031] The operating steps of the present invention are:

[0032] The adjusting cone 3 is rotated and the adjusting cone 3 is rotated and moved along the threaded rod 2, so that the threaded rod 2 drives the support plate 1 to be adjusted horizontally. The horizontal adjustment can be performed by observing the two vertical horizontal tubes 46 on the adjusting component 4. By rotating the turntable 44, the turntable 44 drives the screw rod 43 to rotate, and the rotating screw rod 43 drives the lifting plate 42 to be adjusted up and down, so that the two lifting plates 42 drive the upper sleeve component 5 and the clamping component 6 to drive the detection component 7 to perform corresponding stretching adjustment;

[0033] Then, during the stretching adjustment, the chute plate 62 on the clamping component 6 slides along the sleeve hole 52, and the clamping plate on the chute plate 62 slides and adjusts in the clamping hole 54, so that the n-shaped plate 51 and the chute plate 62 can slide and adjust the length. Then, the detection can be carried out, and the telescopic plate 710 can be pulled to move to the left, so that the telescopic plate 710 drives the entire detection component 7 to first trigger the left signal trigger 11 to generate a signal that is transmitted to the control box 711 to form a point. Then, when the telescopic plate 710 is pulled to move to the right and the movable plate 71 is driven to slide out of the chute plate 62, the sliding plate 73 on the movable plate 71 is stuck in the clamping groove 5 3, so that the entire detection component 7 is still in a state of horizontal support movement to the right. In this way, under the action of the spring 77, the lower fixed plate 76 can always be pushed to drive the moving wheel 78 at the lower end of the moving column 75 to move linearly against the bridge deck. At the same time, the upper end of the moving column 75 drives the displacement detector 79 to form an undulating route formed by the movement of the bridge deck on the real-time tracking and drawing module in the control box 711 to form a curve. When the detection component 7 moves to the right and is triggered by the right signal trigger 11, the signal is transmitted to the control box 711 to form two signal points, thereby forming a straight line between the two points, and then the formed curve can be used as a reference.

[0034] In the description of the present invention, it should be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In the present invention, unless otherwise clearly specified and limited, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be internal communication between two elements or an interaction relationship between two elements. Unless otherwise clearly specified and limited, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0036] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A level detector, comprising two support plates (1), characterized in that: The bottom surfaces of the two support plates (1) are fixedly connected with three threaded rods (2), and the six threaded rods (2) are respectively threadedly connected to the spiral holes opened on the six adjustment cones (3). The upper surfaces of the two support plates (1) are respectively connected to the two adjustment components (4). The front side of the right adjustment component (4) is connected to the fixed plate (8), and the fixed plate (8) is fixedly connected to the outer surface of the laser pen (9). The front side of the left adjustment component (4) is connected to the positioning plate (10). The right support plate (1) and the right adjustment component (4) are respectively connected to two sleeve components (5); the left support plate (1) and the left adjustment component (4) are respectively connected to two clamping components (6); the two clamping components (6) are respectively connected to two sleeve components (5); the two clamping components (6) and the two sleeve components (5) are all connected to the same detection component (7); and a signal trigger (11) is installed in the upper clamping component (6) and the upper sleeve component (5); The two sleeve components (5) each include an n-shaped plate (51), the right sides of the two n-shaped plates (51) are movably connected to the right support plate (1) and the right lifting plate (42) through a hinge seat, the two side plates of each n-shaped plate (51) are provided with a sleeve hole (52) with a left opening on the opposite side, the upper and lower sides of the four sleeve holes (52) are provided with a clamping groove (53), the two side plates of each n-shaped plate (51) are provided with a clamping hole (54) on the opposite side, the four clamping holes (54) are respectively communicated with the four sleeve holes (52), and one of the signal triggers (11) is installed on the inner left side of the upper n-shaped plate (51); The two clamping parts (6) each include a movable plate (61), and the two movable plates (61) are movably connected to the left support plate (1) and the left lifting plate (42) through a hinge seat. The right sides of the two movable plates (61) are fixedly connected with two slide plates (62), and the four slide plates (62) are respectively sleeved with the four sleeve holes (52). The four slide plates (62) are arranged in groups of two, and the right ends of the opposite sides of each group of two plates are fixedly connected with a clamping plate (63). The four clamping plates (63) are all set to a T shape. The four clamping plates (63) are respectively sleeved with the four clamping holes (54). Another signal trigger (11) is installed on the right side of the upper movable plate (61); The detection component (7) includes two movable plates (71), the front and rear ends of the two movable plates (71) are respectively slidably connected to the slide grooves on the four slide groove plates (62), the left and right ends of the two movable plates (71) are fixedly connected with connectors (72), each of the connectors (72) is respectively sleeved with the slide groove on the corresponding slide groove plate (62), the upper and lower surfaces of the two movable plates (71) are fixedly connected with two sliding plates (73), the eight sliding plates (73) are respectively sleeved with the eight clamping grooves (53), the lower movable plate (71) is fixedly connected to the outer surface of the fixed cylinder (74), the fixed cylinder (74) is sleeved with the movable column (75), and the movable column (75) is fixedly connected with two fixed plates (76), and the two fixed plates (76) are respectively located on the upper and lower sides of the lower movable plate (71); The fixed disk (76) on the lower side is fixedly connected to the lower end of the spring (77), the spring (77) is sleeved on the moving column (75), the upper end of the spring (77) is fixedly connected to the bottom surface of the fixed cylinder (74), the upper end of the moving column (75) is connected to the displacement detector (79), and the displacement detector (79) is installed on the bottom surface of the upper moving plate (71). The left sides of the two moving plates (71) are fixedly connected to the same telescopic plate (710). A control box (711) is installed on the upper surface of the upper moving plate (71), and the control box (711) is bidirectionally electrically connected to the displacement detector (79). The input end of the control box (711) is electrically connected to the output ends of the two signal triggers (11).

2. A level detector according to claim 1, characterized in that: The two adjusting components (4) each include two fixing columns (41), the lower ends of the two fixing columns (41) are fixedly connected to the same support plate (1), the upper ends of the two fixing columns (41) are fixedly connected to the bottom surface of the lifting plate (42), the lifting plate (42) is threadedly connected to the screw rod (43) through the opened spiral hole 2, the lower end of the screw rod (43) is rotatably connected to the same support plate (1) through a bearing, the upper end of the screw rod (43) is fixedly connected to the turntable (44), and the two adjacent vertical sides of the lifting plate (42) are fixedly connected to two fixing plates (45), and the four fixing plates (45) are grouped in pairs and the two groups are respectively fixedly connected to two horizontal tubes (46), wherein the front side of the left lifting plate (42) is fixedly connected to the positioning plate (10), and the front side of the right lifting plate (42) is fixedly connected to the fixing plate (8).

3. A level detector according to claim 1, characterized in that: The control box (711) is provided with a route real-time tracking and drawing module, and the route real-time tracking and drawing module includes receiving signals from two signal triggers (11) to automatically form a two-point straight line baseline, and forming a curve in real time on the moving route when the displacement detector (79) moves for detection.

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