A surveying and mapping device for comprehensive land improvement

Abstract

The present invention discloses a surveying and mapping device for comprehensive land improvement, which relates to the field of land surveying and mapping technology, and comprises a bracket, both ends of which are fixedly connected with a focusing disk, a first roller and a second roller are rotatably sleeved on the focusing disk, a first tape measure is wound around the outer surface of the first roller, and a second tape measure is wound around the outer surface of the second roller. The advantages of the present invention are that the first tape measure and the second tape measure can be stretched straight to avoid deformation of the measuring ruler, so that the measuring ruler does not fall due to gravity, and therefore the measuring ruler will not bend naturally during use, so that the reading of the measuring ruler is accurate, and at the same time, the measuring ruler can resist the influence of wind after being stretched straight to further avoid bending, and can continue to maintain accurate readings in particular during long-distance measurement, and can measure land elevation, thereby eliminating the need for other devices to participate in the measurement, ensuring land leveling efficiency and subsequent planning and use while reducing the investment in labor costs and device costs.

Description

Technical Field

[0001] The invention relates to the technical field of land surveying and mapping, and in particular to a surveying and mapping device for comprehensive land improvement. Background Art

[0002] Comprehensive land improvement is a systematic project that, within a certain area, uses the objectives and purposes determined in the overall land use plan, uses land consolidation, reclamation, development, and the increase and decrease of urban and rural construction land as a platform to promote large-scale agricultural operations, concentrated population settlement, industrial cluster development, and advance the process of urban and rural integration. When carrying out land construction, staff are required to use surveying and mapping equipment to detect and map the land to facilitate subsequent construction.

[0003] After searching, Chinese patent number CN118408526B discloses a surveying and mapping device for comprehensive land improvement. Although the vertical height of the end of the measuring ruler can be adjusted while the end of the measuring ruler is fixed, so that the measuring ruler can always be above the ground during the measurement process and will not be affected by the ups and downs of the ground, the measurement is more accurate and efficient. However, because the measuring ruler is deformable, the measuring ruler falls under the action of gravity. Therefore, the measuring ruler will naturally bend during use, making the reading of the measuring ruler still inaccurate. At the same time, the farther the measuring ruler is from the ground, the stronger the impact of wind force it will be, especially for long-distance measurement. Moreover, the surveying and mapping device can only measure length and area, but cannot measure the elevation of the land, so other devices are required to participate in the measurement, which affects the efficiency of land leveling and subsequent planning and use. Summary of the invention

[0004] The purpose of the present invention is to provide a surveying and mapping device for comprehensive land improvement, so as to solve the problem proposed in the background technology that the measuring ruler can be deformed, causing the measuring ruler to fall under the action of gravity, so the measuring ruler will naturally bend during use, so that the reading of the measuring ruler is still inaccurate, and at the same time, the farther the measuring ruler is from the ground, the stronger the influence of wind force it is, especially for long-distance measurement, and the surveying and mapping device can only measure length and area, but cannot measure the elevation of the land, so other devices are required to participate in the measurement, which affects the land leveling efficiency and subsequent planning and use. Technical problems.

[0005] In order to solve the problems raised in the above-mentioned background technology, the present invention provides the following technical solutions: a surveying and mapping device for comprehensive land improvement, comprising a bracket, both ends of the bracket are fixedly connected with a focusing disk, a first roller and a second roller are rotatably sleeved on the focusing disk, a first tape measure is wound around the outer surface of the first roller, a second tape measure is wound around the outer surface of the second roller, a first vertical cylinder is fixedly connected to the end of the first tape measure, a first positioning screw is meshingly sleeved in the first vertical cylinder, a second vertical cylinder is fixedly connected to the end of the second tape measure, a second positioning screw is meshingly sleeved in the second vertical cylinder, and grooves are provided on the outer surfaces of the first tape measure and the second tape measure, a fixing block is fixedly connected to the bottom surface of the groove, a first connecting frame is fixedly connected to the top surface of the fixing block, a second connecting frame is fixedly connected to the bottom surface of the fixing block, and the fixing block is provided with The cam is an angular channel that is formed on a pair of cam faces the side of the first linking frame and the side of the second linking frame is provided with a plurality of locking plates, the locking plates having respective locking cams and a plurality of locking plates respectively.

[0006] A first limit frame and a second limit frame are fixedly connected to the side wall of the focusing plate, a vertical rod is arranged on the bottom surface of the second limit frame, a first cross rod is fixedly connected to the side wall of the vertical rod, a second cross rod is embedded and sleeved on the outer surface of the second vertical tube, a multi-stage cross rod is arranged between the second cross rod and the first cross rod, a cross groove is opened on the top surface of the first cross rod and the multi-stage cross rod, a slider is slidably sleeved in the cross groove, and a telescopic rod is fixedly connected to the bottom surface of the second cross rod and the multi-stage cross rod.

[0007] As a further solution of the present invention: the bracket is arranged in an L shape as a whole, the central axis of the first roller is perpendicular to the second roller, the first tape measure is slidably connected to the first limit frame, the second tape measure is slidably connected to the second limit frame, and the bisector of the end face of the first limit frame coincides with the bisector of the end face of the second limit frame.

[0008] As a further solution of the present invention: the inner surfaces of the first limiting frame and the second limiting frame both squeeze the pressure rod, the clamping rod piston penetrates the side wall of the second closed cavity, and the clamping rod piston is engaged with the clamping groove, and the movable piston is slidably engaged with the first closed cavity.

[0009] As a further solution of the present invention: the top block and the slide rod are both slidably connected to the slide groove, the surface of the positioning groove is arranged in a lightning shape, and the two ends of the positioning groove are connected to the slide groove, the contact surfaces of the top block and the slide rod are both inclined slopes, and the inclination direction of the inclined slopes is the same as the inclination direction of the positioning groove, and the top block is slidably connected to the inclined groove on the end face of the push shaft.

[0010] As a further solution of the present invention: a plurality of the sliders are provided, and the plurality of sliders are fixedly connected to the bottom surfaces of the second cross bar and the multi-stage cross bar, the telescopic rods correspond to the sliders one by one, and scale lines are marked on the telescopic rods.

[0011] As a further solution of the present invention: the bottom surface of the second limiting frame is provided with an embedding groove, an embedding block is slidably sleeved in the embedding groove, the embedding block is fixedly connected to the top surface of the vertical rod, the outer surface of the first tape measure is slidably sleeved with a sliding sleeve, the bottom surface of the sliding sleeve is fixedly connected to a pull rod, and the pull rod is fixedly connected to the side wall of the vertical rod.

[0012] As a further solution of the present invention: the cross sections of the embedding groove and the embedding block are both arranged in a T shape, and the sliding sleeve drives the vertical rod to move through the pull rod.

[0013] As a further solution of the present invention: a ball is slidably sleeved on the bottom surface of the telescopic rod.

[0014] Adopting the above technical solution: Compared with the prior art, the beneficial effects of the present invention are:

[0015] The present invention squeezes the pressure rod so that the pressure rod is inserted into the fixing ring, so that the top block on the pressure rod pushes the sliding rod to move along the sliding groove, so that the moving piston on the sliding rod compresses the air in the first closed chamber, and then the compressed air enters the second closed chamber through the connecting channel, so that the compressed air pushes the clamping rod piston to move, and further the clamping rod piston extends out of the second closed chamber and is clamped with the clamping groove on the connecting block, so that the first connecting frame, the second connecting frame and the connecting block are fixed to each other, so that the fixing blocks passing through the first limiting frame and the second limiting frame are fixed to each other and kept straight, and then the first tape measure and the second tape measure passing through the first limiting frame and the second limiting frame are straightened, so as to avoid deformation of the measuring ruler and prevent the measuring ruler from falling due to gravity. Therefore, the measuring ruler will not bend naturally during use, so that the reading of the measuring ruler is accurate. At the same time, after being straightened, the measuring ruler can resist the influence of wind force and further avoid bending, especially when measuring over long distances, the reading can still be kept accurate.

[0016] The present invention drives the second cross bar to translate through the second vertical cylinder. When the second cross bar moves to the rightmost side of the first multi-stage cross bar, the slider on the second cross bar will drive the multi-stage cross bar to translate step by step until the lowest multi-stage cross bar moves to the rightmost side of the first cross bar. In the above process, the constraints of the telescopic rod located on the second cross bar and the bottom surface of the multi-stage cross bar are released, so that the telescopic rod falls freely and contacts the ground. At this time, the reading difference on the telescopic rod is the height difference on the land. Finally, the vertical rod is driven to translate through the pull rod on the sliding sleeve, so that the ball bearing on the telescopic rod slides on the land surface. At this time, the telescopic rod will expand and contract with the ups and downs of the ground, thereby achieving the purpose of measuring the land elevation, thereby eliminating the need for other devices to participate in the measurement, ensuring the land leveling efficiency and subsequent planning and use while reducing the investment in labor costs and equipment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a surveying and mapping device for comprehensive land improvement in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the first limiting frame in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the first rotating roller in an embodiment of the present invention;

[0020] Figure 4 for Figure 3 A magnified view of the structure of part A;

[0021] Figure 5 This is a schematic diagram of the connection block structure in an embodiment of the present invention;

[0022] Figure 6 A cross-sectional view of a fixed block structure in an embodiment of the present invention;

[0023] Figure 7 A half-section schematic diagram of a fixing ring structure in an embodiment of the present invention;

[0024] Figure 8 Schematic diagram of a multi-stage crossbar structure in an embodiment of the present invention;

[0025] Fig. 9 for Figure 8 A magnified view of the structure of part B;

[0026] Fig.10 Schematic diagram of the translation of the second crossbar structure in an embodiment of the present invention.

[0027] In the figure: 1, bracket; 2, convergence plate; 3, first rotating roller; 4, second rotating roller; 5, first measuring tape; 6, second measuring tape; 7, first vertical cylinder; 8, first positioning screw; 9, second vertical cylinder; 10, second positioning screw; 11, groove; 12, fixing block; 13, first connecting frame; 14, second connecting frame; 15, connecting block; 16, slot; 17, first closed chamber; 18, second closed chamber; 19, connecting channel; 20, The clamping rod piston; 21, the fixing ring; 22, the sliding groove; 23, the positioning groove; 24, the pressure rod; 25, the top block; 26, the driving shaft; 27, the moving piston; 28, the sliding rod; 29, the first limiting frame; 30, the second limiting frame; 31, the sliding sleeve; 32, the pulling rod; 33, the vertical rod; 34, the embedded block; 35, the embedded groove; 36, the first cross bar; 37, the second cross bar; 38, the multi-stage cross bar; 39, the horizontal groove; 40, the slider; 41, the telescopic rod. DETAILED DESCRIPTION

[0028] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Example 1

[0029] See also Figure 1-Figure 8A surveying and mapping device for comprehensive land improvement comprises a bracket 1, both ends of the bracket 1 are fixedly connected with a focusing disk 2, a first roller 3 and a second roller 4 are rotatably sleeved on the focusing disk 2, a first tape measure 5 is wound around the outer surface of the first roller 3, a second tape measure 6 is wound around the outer surface of the second roller 4, a first vertical cylinder 7 is fixedly connected to the end of the first tape measure 5, a first positioning screw 8 is meshingly sleeved in the first vertical cylinder 7, a second vertical cylinder 9 is fixedly connected to the end of the second tape measure 6, a second positioning screw 10 is meshingly sleeved in the second vertical cylinder 9, and a groove 11 is provided on the outer surfaces of the first tape measure 5 and the second tape measure 6, a fixing block 12 is fixedly connected to the bottom surface of the groove 11, a first connecting frame 13 is fixedly connected to the top surface of the fixing block 12, a second connecting frame 14 is fixedly connected to the bottom surface of the fixing block 12, a plurality of fixing blocks 12 are provided, and the plurality of fixing blocks 12 are sequentially arranged in the groove 11, and the second connecting frame 14 A connecting block 15 is rotatably connected to the first connecting frame 13, and slots 16 are provided on all sides of the connecting block 15. A first closed chamber 17 is provided on the side wall of the fixed block 12, and second closed chambers 18 are provided in the side walls of the second connecting frame 14 and the first connecting frame 13. A connecting channel 19 is connected between the second closed chamber 18 and the first closed chamber 17, and a rod piston 20 is slidably sleeved in the second closed chamber 18, a fixing ring 21 is fixed to the inner surface of the first closed chamber 17, a sliding groove 22 is provided on the outer surface of the fixing ring 21, and a positioning groove 23 is provided on the end surface of the fixing ring 21, a pressure rod 24 is slidably sleeved in the fixing ring 21, a top block 25 is fixed to the end of the pressure rod 24, and one end of a driving shaft 26 is slidably sleeved on the end surface of the pressure rod 24, a moving piston 27 is fixed to the other end of the pushing shaft 26, and a sliding rod 28 is fixed to the end surface of the moving piston 27.

[0030] See also Figure 1 and Figure 2 The bracket 1 is arranged in an L shape as a whole, the central axis of the first roller 3 is perpendicular to the central axis of the second roller 4, the first tape measure 5 is slidably connected to the first limit frame 29, the second tape measure 6 is slidably connected to the second limit frame 30, and the bisector of the end face of the first limit frame 29 coincides with the bisector of the end face of the second limit frame 30.

[0031] See also Figure 3 , Figure 5 and Figure 6 The inner surfaces of the first limiting frame 29 and the second limiting frame 30 squeeze the pressure rod 24, the clamping rod piston 20 penetrates the side wall of the second closed cavity 18, and the clamping rod piston 20 is engaged with the clamping groove 16, and the moving piston 27 is slidably engaged with the first closed cavity 17.

[0032] Specifically, in the process of surveying the land area, the bracket 1 is placed at a corner of the land, and then the first vertical cylinder 7 and the second vertical cylinder 9 are pulled to move to the adjacent sides of the land, so that the first vertical cylinder 7 and the second vertical cylinder 9 move to the corner of the land. At this time, the first positioning screw 8 and the second positioning screw 10 are respectively rotated, so that the first positioning screw 8 and the second positioning screw 10 are inserted into the land while descending, so as to achieve the purpose of fixing the first vertical cylinder 7 and the second vertical cylinder 9. In the above process, the movement of the first vertical cylinder 7 and the second vertical cylinder 9 will drive the ends of the first tape measure 5 and the second tape measure 6 to move, so that the first tape measure 5 is separated from the first roller 3, and the second tape measure 6 is separated from the second roller 4. At the same time, the first tape measure 5 gradually passes through the first limiting frame 29, and the second tape measure 6 gradually passes through the second limiting frame 30. When passing through, the first limiting frame 29 and the second limiting frame 30 will synchronously squeeze the pressure rod 24, so that the pressure rod 24 is inserted into the fixing ring 21, so that the top block 25 on the pressure rod 24 pushes The slide bar 28 moves along the slide groove 22, so that the movable piston 27 on the slide bar 28 compresses the air in the first closed chamber 17, and then the compressed air enters the second closed chamber 18 through the connecting channel 19, so that the compressed air pushes the clamping rod piston 20 to move, and further makes the clamping rod piston 20 extend out of the second closed chamber 18 and engage with the clamping groove 16 on the connecting block 15, so that the first connecting frame 13, the second connecting frame 14 and the connecting block 15 are fixed to each other, so that the fixed block 12 passing through the first limit frame 29 and the second limit frame 30 is fixed to each other and remains straight, so that the first tape measure 5 and the second tape measure 6 passing through the first limit frame 29 and the second limit frame 30 are straightened to avoid deformation of the measuring ruler and prevent the measuring ruler from falling due to gravity. Therefore, the measuring ruler will not bend naturally during use, so that the reading of the measuring ruler is accurate. At the same time, after the measuring ruler is straightened, it can resist the influence of wind force and further avoid bending, especially when measuring over long distances, the reading can still be accurate. Example 2

[0033] See also Figure 2 and Figure 7-Figure 9 A surveying and mapping device for comprehensive land improvement, a first limit frame 29 and a second limit frame 30 are fixedly connected to the side wall of the focusing disk 2, a vertical rod 33 is arranged on the bottom surface of the second limit frame 30, a first cross bar 36 is fixedly connected to the side wall of the vertical rod 33, a second cross bar 37 is fitted and sleeved on the outer surface of the second vertical tube 9, a multi-stage cross bar 38 is arranged between the second cross bar 37 and the first cross bar 36, a cross groove 39 is opened on the top surface of the first cross bar 36 and the multi-stage cross bar 38, a slider 40 is slidably sleeved in the cross groove 39, and a telescopic rod 41 is fixedly connected to the bottom surface of the second cross bar 37 and the multi-stage cross bar 38.

[0034] See also Figure 7The top block 25 and the slide rod 28 are both slidably connected to the slide groove 22. The surface of the positioning groove 23 is set in a lightning shape, and the two ends of the positioning groove 23 are connected to the slide groove 22. The contact surfaces of the top block 25 and the slide rod 28 are both inclined slopes, and the inclination direction of the inclined slopes is the same as the inclination direction of the positioning groove 23. The top block 25 is slidably connected to the inclined groove on the end face of the push shaft 26.

[0035] See also Figure 8 A plurality of sliders 40 are provided, and the plurality of sliders 40 are fixedly connected to the bottom surfaces of the second cross bar 37 and the multi-stage cross bar 38 . The telescopic rods 41 correspond to the sliders 40 one by one, and the telescopic rods 41 are marked with scale lines.

[0036] Specifically, in the process of measuring the land elevation, the movement of the above-mentioned second vertical cylinder 9 will synchronously drive the second cross bar 37 to translate. When the second cross bar 37 moves to the rightmost side of the first multi-stage cross bar 38, the slider 40 on the second cross bar 37 will drive the multi-stage cross bar 38 to translate step by step until the lowest multi-stage cross bar 38 moves to the rightmost side of the first cross bar 36. In the above process, the constraints of the telescopic rod 41 located on the bottom surfaces of the second cross bar 37 and the multi-stage cross bar 38 are released, so that the telescopic rod 41 falls freely and contacts the ground. At this time, the reading difference on the telescopic rod 41 is the height difference on the land. Finally, the pull rod 32 on the sliding sleeve 31 drives the vertical rod 33 to translate, so that the ball bearing on the telescopic rod 41 slides on the land surface. At this time, the telescopic rod 41 will expand and contract with the ups and downs of the ground, thereby achieving the purpose of measuring the land elevation, thereby eliminating the need for other devices to participate in the measurement, ensuring the land leveling efficiency and subsequent planning and use while reducing the investment in labor costs and equipment costs. Example 3

[0037] See also Figure 2 , Figure 8 and Fig. 9 A surveying and mapping device for comprehensive land improvement, a second limiting frame 30 has an embedding groove 35 on its bottom surface, an embedding block 34 is slidably sleeved in the embedding groove 35, the embedding block 34 is fixedly connected to the top surface of the vertical rod 33, a sliding sleeve 31 is slidably sleeved on the outer surface of the first tape measure 5, a pull rod 32 is fixedly connected to the bottom surface of the sliding sleeve 31, and the pull rod 32 is fixedly connected to the side wall of the vertical rod 33.

[0038] See also Fig. 9 The cross sections of the embedding groove 35 and the embedding block 34 are both T-shaped, and the sliding sleeve 31 drives the vertical rod 33 to move through the pull rod 32.

[0039] See also Figure 8 The bottom surface of the telescopic rod 41 is slidably sleeved with a ball.

[0040] Specifically, in the process of measuring the elevation of a large area of ​​land, the pull rod 32 can be translated and the reading of the telescopic rod 41 can be recorded at all times, so that the device can measure the elevation of the land while measuring the land area, thereby saving costs.

[0041] The working principle and use process of the present invention are as follows: during the process of comprehensive land improvement, when it is necessary to survey the land, the bracket 1 is placed at a corner of the land, and then the first vertical cylinder 7 and the second vertical cylinder 9 are pulled to move to the adjacent two sides of the land, so that the first vertical cylinder 7 and the second vertical cylinder 9 are moved to the corner of the land, and then the first positioning screw 8 and the second positioning screw 10 are respectively rotated, so that the first positioning screw 8 and the second positioning screw 10 are inserted into the land while descending, so as to achieve the purpose of fixing the first vertical cylinder 7 and the second vertical cylinder 9;

[0042] During the above process, the movement of the first vertical cylinder 7 and the second vertical cylinder 9 will drive the ends of the first tape measure 5 and the second tape measure 6 to move, so that the first tape measure 5 is separated from the first roller 3, and the second tape measure 6 is separated from the second roller 4. At the same time, the first tape measure 5 gradually passes through the first limiting frame 29, and the second tape measure 6 gradually passes through the second limiting frame 30. When passing through, the first limiting frame 29 and the second limiting frame 30 will synchronously squeeze the pressure rod 24, so that the pressure rod 24 is inserted into the fixing ring 21, so that the top block 25 on the pressure rod 24 pushes the slide bar 28 to move along the slide groove 22, so that the moving piston 27 on the slide bar 28 compresses the air in the first closed chamber 17, and then the compressed air enters the second closed chamber 18 through the connecting channel 19, so that the compressed air pushes The movement of the clamping rod piston 20 further causes the clamping rod piston 20 to extend out of the second closed cavity 18 and engage with the clamping groove 16 on the connecting block 15, so that the first connecting frame 13, the second connecting frame 14 and the connecting block 15 are fixed to each other, so that the fixing block 12 passing through the first limiting frame 29 and the second limiting frame 30 is fixed to each other and kept straight, and then the first tape measure 5 and the second tape measure 6 passing through the first limiting frame 29 and the second limiting frame 30 are straightened to avoid deformation of the measuring ruler, so that the measuring ruler does not fall due to gravity, so that the measuring ruler will not bend naturally during use, so that the reading of the measuring ruler is accurate, and at the same time, after the measuring ruler is straightened, it can resist the influence of wind force, further avoid bending, and can continue to maintain accurate readings, especially when measuring over long distances;

[0043] In the above process, when the slide bar 28 is separated from the slide groove 22 under the action of the top block 25, the constraint of the slide groove 22 on the slide bar 28 is released, so that the slide bar 28 at this time rotates under the action of the inclined surface and the top block 25, so that the slide bar 28 slides into the positioning groove 23, so that the positioning groove 23 limits the return of the slide bar 28, thereby maintaining the compression of the first closed chamber 17, indirectly keeping the first tape measure 5 and the second tape measure 6 straight, when it is necessary to recover the first tape measure 5 and the second tape measure 6, the pressure rod 24 will be squeezed by the first limit frame 29 and the second limit frame 30 again, at this time the top block 25 will squeeze the inclined groove on the push shaft 26, so that the push shaft 26 further rotates under the pressure of the top block 25, so that the push shaft 26 drives the slide bar 28 to rotate and separate from the positioning groove 23 and slide into the adjacent slide groove 22, so that the slide bar 28 and the moving piston 27 return, and the fixation of the first tape measure 5 and the second tape measure 6 is released;

[0044] When it is necessary to measure the elevation of the land, the movement of the above-mentioned second vertical cylinder 9 will synchronously drive the second cross bar 37 to translate. When the second cross bar 37 moves to the rightmost side of the first multi-stage cross bar 38, the slider 40 on the second cross bar 37 will drive the multi-stage cross bar 38 to translate step by step until the lowest multi-stage cross bar 38 moves to the rightmost side of the first cross bar 36. In the above process, the constraints of the telescopic rod 41 located on the bottom surfaces of the second cross bar 37 and the multi-stage cross bar 38 are released, so that the telescopic rod 41 falls freely and contacts the ground. At this time, the reading difference on the telescopic rod 41 is the height difference on the land. Finally, the pull rod 32 on the sliding sleeve 31 drives the vertical rod 33 to translate, and the second cross bar 37 is separated from the second vertical cylinder 9. At the same time, the ball bearing on the telescopic rod 41 slides on the surface of the land. At this time, the telescopic rod 41 will expand and contract with the ups and downs of the ground, so as to achieve the purpose of measuring the elevation of the land, so that no other devices are required to participate in the measurement, while ensuring the efficiency of land leveling and subsequent planning and use, reducing the investment in labor costs and equipment costs, and completing the operation.

[0045] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A surveying and mapping device for comprehensive land improvement, characterized in that: The invention comprises a bracket (1), both ends of the bracket (1) are fixedly connected to a gathering disk (2), a first roller (3) and a second roller (4) are rotatably sleeved on the gathering disk (2), a first tape measure (5) is wound around the outer surface of the first roller (3), a second tape measure (6) is wound around the outer surface of the second roller (4), an end of the first tape measure (5) is fixedly connected to a first vertical cylinder (7), a first positioning screw (8) is meshingly sleeved inside the first vertical cylinder (7), an end of the second tape measure (6) is fixedly connected to a second vertical cylinder (9), and the A second positioning screw (10) is meshedly sleeved in the second vertical cylinder (9), and the outer surfaces of the first tape measure (5) and the second tape measure (6) are both provided with a groove (11), a fixing block (12) is fixedly connected to the bottom surface of the groove (11), a first connecting frame (13) is fixedly connected to the top surface of the fixing block (12), and a second connecting frame (14) is fixedly connected to the bottom surface of the fixing block (12), a plurality of the fixing blocks (12) are provided, and the plurality of fixing blocks (12) are sequentially arranged in the groove (11), and the second connecting frame (14) is connected to the first connecting frame (13). A connecting block (15) is rotatably connected between the connecting frames (13), and the connecting block (15) is provided with a clamping groove (16) on all sides. A first closed cavity (17) is provided on the side wall of the fixing block (12), and a second closed cavity (18) is provided in the side walls of the second connecting frame (14) and the first connecting frame (13). A connecting passage (19) is connected between the second closed cavity (18) and the first closed cavity (17), and a clamping rod piston (20) is slidably sleeved in the second closed cavity (18). The first closed cavity (17) ) is fixedly connected to the inner surface of a fixing ring (21), a sliding groove (22) is provided on the outer surface of the fixing ring (21), and a positioning groove (23) is provided on the end surface of the fixing ring (21), a pressure rod (24) is slidably sleeved in the fixing ring (21), a top block (25) is fixedly connected to the end of the pressure rod (24), and one end of a driving shaft (26) is slidably sleeved on the end surface of the pressure rod (24), a moving piston (27) is fixedly connected to the other end of the driving shaft (26), and a sliding rod (28) is fixedly connected to the end surface of the moving piston (27); A first limit frame (29) and a second limit frame (30) are fixedly connected to the side wall of the closing plate (2); a vertical rod (33) is arranged on the bottom surface of the second limit frame (30); a first cross rod (36) is fixedly connected to the side wall of the vertical rod (33); a second cross rod (37) is fitted and sleeved on the outer surface of the second vertical tube (9); a multi-stage cross rod (38) is arranged between the second cross rod (37) and the first cross rod (36); a cross groove (39) is provided on the top surface of the first cross rod (36) and the multi-stage cross rod (38); a slider (40) is slidably sleeved in the cross groove (39); and a telescopic rod (41) is fixedly connected to the bottom surface of the second cross rod (37) and the multi-stage cross rod (38).

2. A surveying and mapping device for comprehensive land improvement according to claim 1, characterized in that: The bracket (1) is arranged in an L-shape as a whole, the central axes of the first rotating roller (3) and the second rotating roller (4) are perpendicular, the first measuring tape (5) is slidably sleeved with the first limiting frame (29), the second measuring tape (6) is slidably sleeved with the second limiting frame (30), and the bisector of the end surface of the first limiting frame (29) coincides with the bisector of the end surface of the second limiting frame (30).

3. A surveying and mapping device for comprehensive land improvement according to claim 1, characterized in that: The inner surfaces of the first limiting frame (29) and the second limiting frame (30) both squeeze the pressure rod (24), the clamping rod piston (20) penetrates the side wall of the second closed cavity (18), the clamping rod piston (20) is engaged with the clamping groove (16), and the movable piston (27) is slidably engaged with the first closed cavity (17).

4. A surveying and mapping device for comprehensive land improvement according to claim 1, characterized in that: The top block (25) and the slide rod (28) are both slidably connected to the slide groove (22); the surface of the positioning groove (23) is arranged in a lightning shape, and both ends of the positioning groove (23) are connected to the slide groove (22); the contact surfaces of the top block (25) and the slide rod (28) are both inclined surfaces, and the inclination direction of the inclined surfaces is the same as the inclination direction of the positioning groove (23); the top block (25) is slidably connected to the inclined groove on the end surface of the driving shaft (26).

5. A surveying and mapping device for comprehensive land improvement according to claim 1, characterized in that: A plurality of the sliders (40) are provided, and the plurality of sliders (40) are fixedly connected to the bottom surfaces of the second crossbar (37) and the multi-stage crossbar (38); the telescopic rods (41) correspond to the sliders (40) one by one, and scale lines are marked on the telescopic rods (41).

6. A surveying and mapping device for comprehensive land improvement according to claim 1, characterized in that: The bottom surface of the second limiting frame (30) is provided with an embedding groove (35), an embedding block (34) is slidably sleeved in the embedding groove (35), and the embedding block (34) is fixedly connected to the top surface of the vertical rod (33); the outer surface of the first measuring tape (5) is slidably sleeved with a sliding sleeve (31), the bottom surface of the sliding sleeve (31) is fixedly connected to a pull rod (32), and the pull rod (32) is fixedly connected to the side wall of the vertical rod (33).

7. A surveying and mapping device for comprehensive land improvement according to claim 6, characterized in that: The cross sections of the embedding groove (35) and the embedding block (34) are both T-shaped, and the sliding sleeve (31) drives the vertical rod (33) to move via the pull rod (32).

8. A surveying and mapping device for comprehensive land improvement according to claim 6, characterized in that: A ball bearing is slidably sleeved on the bottom surface of the telescopic rod (41).

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