Multipurpose measuring scale for civil engineering management

Abstract

The utility model discloses a multipurpose measuring scale for civil engineering management, which comprises a first ruler and a second ruler, a first scale mark is arranged on the front side of the first ruler, and a second scale mark is arranged on the front side of the second ruler. According to the utility model, through the arrangement of a series of structures, the inclination angle of the second ruler can be adjusted according to use requirements, so that the distance between two buildings can be measured, and through the arrangement of the measuring tape, the longer distance of constructional engineering can be measured; the measuring tape, the second ruler with the adjustable inclination angle and the first ruler are integrated, the short distance, the long distance and the angle in constructional engineering can be measured, the multipurpose range of the measuring ruler is widened, in addition, the measuring ruler can be stored in the storage groove in cooperation with rotation of the second ruler, the total size of the whole device is reduced, and carrying is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to civil engineering management technical field especially, relates to a civil engineering management is with multi -use measuring scale. BACKGROUND

[0002] The measuring scale for civil engineering management is a tool for measuring length, width, angle or height data, wherein the right angle ruler is a common ruler in the engineering management process, mainly used for wall thickness measurement, and can detect whether the wall surface is inclined to the horizontal plane, for example, the search announcement number: CN210533348U disclosed by the novelty search agency, a civil engineering management is with multi -use measuring scale, including right angle ruler, the transverse part of right angle ruler is equipped with mounting hole, and the mounting hole is equipped with level tube, the edge of right angle ruler is equipped with scale line and number respectively, the vertical part top of right angle ruler is equipped with alignment block, and the vertical part and alignment block of right angle ruler are equipped with rod hole, and the rod hole is inserted with the taper head rod;Hold the transverse part of right angle ruler with one hand, the taper head rod is downward, and the slider is pushed, the taper head rod is continuously stretched from the scraping ring, the taper tip of taper head rod is inserted into the thermal insulation mortar and concrete layer, until the taper tip of taper head rod contacts the base surface, then the right angle ruler is pressed downward, until the alignment block contacts the upper surface of thermal insulation mortar and concrete layer, the scale line and number on the right angle ruler corresponding to the upper end of slider can be watched, the thickness of the thermal insulation mortar and concrete layer of paving can be measured, and the right angle ruler is more versatile.

[0003] The above-mentioned patent discloses the multi -use measuring scale for civil engineering management, which can measure the thickness of the thermal insulation mortar and concrete layer of paving through the taper head rod, but the range of the right angle ruler is still small, and when measuring a long distance or the angle of a building, a tape measure and an angle gauge still need to be carried separately, and a single measuring scale cannot realize multiple functions, and it is inconvenient to carry multiple measuring scales each time, and the right angle ruler of the above-mentioned patent occupies a large space when carried after use, and is still inconvenient to carry, and according to the above-mentioned situation, the multi -use measuring scale for civil engineering management is improved. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings in the prior art and provides a multi -use measuring scale for civil engineering management.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a multi -purpose measuring scale for civil engineering management, including first ruler and second ruler, the front side of first ruler is equipped with first scale line, and the front side of second ruler is equipped with second scale line, and first ruler, second ruler, first scale line and second scale line cooperate, can measure the thickness of building wall and near distance, the top of first ruler is opened and is equipped with the receiving groove of left side opening, and the receiving groove is matched with second ruler, and the receiving groove can be used for receiving second ruler, and the front side left of first ruler is fixedly connected with the tape measure for measuring long distance, and the front side of tape measure is equipped with annular scale line, and the front side of first ruler and the front side of second ruler are all fixedly connected with the pointer matched with annular scale line, and the pointer and annular scale line cooperate, can measure the included angle between two buildings, and the rear side of tape measure is fixedly connected with support shaft, and hard rubber sleeve is fixedly sleeved on support shaft, and second ruler is movably sleeved on hard rubber sleeve, and the top of hard rubber sleeve is in close contact with the elastic pressure solid mechanism mounted on second ruler, and the elastic pressure solid mechanism is matched with hard rubber sleeve, can fix second ruler, two limit rings are fixedly sleeved on support shaft, and the front side and rear side of second ruler respectively with two limit rings the side of mutual close contact is movably contacted, and the limit ring is used for limiting second ruler, and the top of second ruler is embedded with the thickness detection mechanism for measuring the thickness of concrete.

[0007] Preferably, the tape measure includes a circular box fixedly installed on the left side of the front side of the first ruler, a winding shaft is rotatably installed on the inner wall of the rear side of the circular box, a tape measure belt is wound around the winding shaft, the tape measure belt is used for measuring a longer distance, a through hole is formed in the left side inner wall of the circular box, one end of the tape measure belt extends to the left side of the circular box through the through hole and is fixedly connected with an arc-shaped limiting block, the other end of the tape measure belt is fixedly connected with the outer side of the winding shaft, the arc-shaped limiting block is magnetically attracted and fixed to the left side of the circular box, the arc-shaped limiting block is used for limiting the tape measure belt, inclined scrapers are fixedly connected to the top inner wall and the bottom inner wall of the through hole, the two scrapers are symmetrically arranged, rubber strips are fixedly bonded to the side of mutual close contact of the two scrapers, the sides of mutual close contact of the two rubber strips are movably contacted with the top and the bottom of the tape measure belt, the rubber strips and the scrapers cooperate to scrape and clean the dust on the tape measure belt, keeping the cleanliness of the tape measure belt, a pull ring is fixedly connected to the left side of the arc-shaped limiting block, the front end of the winding shaft extends to the front side of the circular box and is fixedly connected with a knob, a T-shaped pressure screw is in close contact with the front side of the circular box, the knob is threadedly sleeved on the T-shaped pressure screw, and under the action of the friction force between the T-shaped pressure screw and the circular box, the knob and the winding shaft can be fixed, the annular scale line is arranged on the front side of the circular box, and the support shaft is fixedly installed on the rear side of the circular box.

[0008] Preferably, the elastic clamping mechanism includes a clamping rod, the bottom end of which is bonded with a rubber friction pad. The bottom of the rubber friction pad is in close contact with the top of a hard rubber sleeve. Under the frictional force between the rubber friction pad and the hard rubber sleeve, the second ruler can be fixed. A rectangular cavity is provided on the second ruler, and the clamping rod is slidably sleeved in the rectangular cavity. A compression spring in a compressed state is fixedly connected between the top end of the clamping rod and the top inner wall of the rectangular cavity. A push rod is fixedly connected to the left side of the clamping rod, and the left end of the push rod extends to the left side of the second ruler. The second ruler is slidably sleeved on the push rod. The push rod is used to drive the clamping rod to move vertically.

[0009] Preferably, the thickness detection mechanism includes a conical rod with a third scale line on its front side. A rectangular groove is provided at the top of the second ruler, and the conical rod is slidably fitted into the rectangular groove. A T-shaped fixing bolt is tightly contacted on the top left side of the conical rod, and the second ruler is threaded onto the T-shaped fixing bolt. A push block is fixedly connected to the bottom left side of the conical rod, and the left side of the push block extends to the left side of the second ruler. The second ruler is slidably fitted onto the push block, and a limit block is fixedly connected to the top left side of the second ruler.

[0010] Preferably, a first magnet is embedded and fixed on the bottom inner wall of the storage slot, and a second magnet is embedded and fixed on the right side of the second ruler. The first magnet and the second magnet cooperate, and the second ruler can be fixed after being stored by the attraction force between the first magnet and the second magnet. A level for measuring the levelness is fixedly connected to the front side of the first ruler.

[0011] Preferably, a circular hole is provided at the bottom front side of the second ruler, the top of the circular hole is connected to the bottom of the rectangular cavity, and the inner wall of the circular hole is in contact with the outer side of the hard rubber sleeve.

[0012] Preferably, two third magnets are embedded and fixed on the left side of the circular box, the arc-shaped limiting block is made of iron, and the right side of the arc-shaped limiting block is attracted to the left side of the two third magnets. Under the attraction force between the third magnets and the arc-shaped limiting block, the arc-shaped limiting block can be fixed.

[0013] Compared with existing technologies, the beneficial effects of this utility model are:

[0014] 1. The measuring tape is designed to measure longer distances.

[0015] 2. Through the cooperation of the support shaft, rigid rubber sleeve, elastic clamping mechanism, pointer and circular scale, the tilt angle of the second ruler can be adjusted according to the needs of use, so as to measure the angle between two buildings. The integrated design of the measuring tape, the second ruler with adjustable tilt angle and the first ruler can measure short distances, long distances and angles in construction projects, improving the versatility of the measuring ruler. In addition, with the storage slot, the second ruler can be stored in the storage slot, thereby reducing the overall size of the device and making it easy to carry.

[0016] This invention, through a series of structural designs, allows for adjustment of the tilt angle of the second ruler according to usage needs, enabling the measurement of the distance between two buildings. The addition of a measuring tape allows for measurement of longer distances in construction projects. The integrated design of the measuring tape, the adjustable second ruler, and the first ruler allows for measurement of short distances, long distances, and angles in construction projects, increasing the versatility of the measuring ruler. Furthermore, the second ruler can be rotated and stored in a storage slot, reducing the overall size of the device and making it easy to carry. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a multi-purpose measuring ruler for civil engineering management proposed in this utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the rear view structure;

[0019] Figure 3 This is a schematic diagram of the front sectional view of a multi-purpose measuring ruler for civil engineering management proposed in this utility model;

[0020] Figure 4 for Figure 3 A magnified structural diagram of part A in the middle;

[0021] Figure 5 This is a rear-view sectional structural diagram of a multi-purpose measuring ruler for civil engineering management proposed in this utility model.

[0022] In the diagram: 1. First ruler; 101. Storage slot; 102. First magnet; 103. First graduation line; 2. Second ruler; 201. Second magnet; 202. Second graduation line; 3. Thickness detection mechanism; 301. Conical rod; 302. Push block; 303. Rectangular slot; 304. T-shaped fixing bolt; 305. Limiting block; 4. Measuring tape; 401. Circular box; 402. Rewinding shaft; 403. Measuring tape strap 404. Through hole; 405. Arc-shaped limiting block; 406. Scraper; 407. Circular scale line; 408. Knob; 409. T-shaped clamping bolt; 5. Elastic clamping mechanism; 501. Clamping rod; 502. Rectangular cavity; 503. Limiting ring; 504. Push rod; 505. Compression spring; 506. Support shaft; 507. Hard rubber sleeve; 508. Rubber friction rubber sheet; 6. Level; 7. Pointer. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figures 1-5 A multi-purpose measuring ruler for civil engineering management includes a first ruler 1 and a second ruler 2. The first ruler 1 has a first scale line 103 on its front side, and the second ruler 2 has a second scale line 202 on its front side. The first ruler 1, the second ruler 2, the first scale line 103, and the second scale line 202 work together to measure the thickness of building walls and close-range measurements. The top of the first ruler 1 has a storage slot 101 with an opening on the left side. The storage slot 101 works with the second ruler 2 and can be used to store the second ruler 2. A first magnet 102 is embedded and fixed on the bottom inner wall of the storage slot 101, and a second magnet 201 is embedded and fixed on the right side of the second ruler 2. The first magnet 102 and the second magnet 201 work together, and the second ruler 2 can be fixed after being stored by the attraction force between the first magnet 102 and the second magnet 201. A level 6 for measuring levelness is fixedly connected to the front side of the first ruler 1.

[0025] A measuring tape 4 for measuring long distances is fixedly connected to the front left side of the first ruler 1. The measuring tape 4 includes a circular box 401 fixedly mounted to the front left side of the first ruler 1. A take-up shaft 402 is rotatably mounted on the rear inner wall of the circular box 401. A first bearing is fixedly connected to the rear inner wall of the circular box 401. The inner side of the inner ring of the first bearing is fixedly connected to the outer side of the take-up shaft 402. The first bearing serves to allow the take-up shaft 402 to rotate. A measuring tape 403 is wound around the take-up shaft 402. The measuring tape 403 is used to measure longer distances. A through hole 404 is opened on the left inner wall of the circular box 401. One end of the measuring tape 403 passes through the through hole 404 and extends... An arc-shaped limiting block 405 extends to the left side of the circular box 401 and is fixedly connected to it. The other end of the measuring tape 403 is fixedly connected to the outside of the take-up shaft 402. The arc-shaped limiting block 405 is magnetically fixed to the left side of the circular box 401. Two third magnets are embedded and fixed on the left side of the circular box 401. The arc-shaped limiting block 405 is made of iron. The right side of the arc-shaped limiting block 405 is attracted to the left side of the two third magnets. Under the attraction between the third magnets and the arc-shaped limiting block 405, the arc-shaped limiting block 405 can be fixed. The arc-shaped limiting block 405 is used to restrict the end of the measuring tape 403 to prevent the measuring tape 403 from completely entering the circular box 401 and being unable to be pulled out. In this case, inclined scrapers 406 are fixedly connected to the top and bottom inner walls of the through hole 404. The two scrapers 406 are symmetrically arranged, and rubber strips are glued and fixed to the sides of the two scrapers 406 that are close to each other. The sides of the two rubber strips that are close to each other are in contact with the top and bottom of the measuring tape 403, respectively. The rubber strips and scrapers 406 cooperate to scrape and clean the dust on the measuring tape 403, keeping the measuring tape 403 clean. A pull ring is fixedly connected to the left side of the arc-shaped limiting block 405. The front end of the winding shaft 402 extends to the front side of the circular box 401 and is fixedly connected to a knob 408. The first through hole is opened on the inner wall of the front side of the circular box 401. The first through hole has a second bearing fixedly fitted inside it. The inner ring of the second bearing is fixedly connected to the outer side of the take-up shaft 402. The second bearing serves to allow the take-up shaft 402 to rotate and be installed. The circular box 401 consists of a box body with an opening on the front and a box cover fixed to the front of the box body. The front of the circular box 401 is in close contact with a T-shaped clamping bolt 409. The knob 408 is threaded onto the T-shaped clamping bolt 409. The front of the knob 408 has a first bolt hole, which is threadedly connected to the T-shaped clamping bolt 409. Under the friction between the T-shaped clamping bolt 409 and the circular box 401, the knob 408 and the take-up shaft 402 can be fixed.

[0026] The front of the circular box 401 is provided with an annular scale line 407. A pointer 7, which cooperates with the annular scale line 407, is fixedly connected to the front of both the first ruler 1 and the front of the second ruler 2. The pointer 7 and the annular scale line 407 cooperate to measure the angle between two buildings. A support shaft 506 is fixedly connected to the rear of the circular box 401. A rigid rubber sleeve 507 is fixedly fitted on the support shaft 506. The second ruler 2 is movably fitted onto the rigid rubber sleeve 507. The bottom of the front of the second ruler 2... A circular hole is provided in the part, and the inner wall of the circular hole is in close contact with the outer side of the rigid rubber sleeve 507. The top of the rigid rubber sleeve 507 is in close contact with an elastic clamping mechanism 5 installed on the second ruler 2. The elastic clamping mechanism 5 includes a clamping rod 501, and a rubber friction pad 508 is glued and fixed to the bottom end of the clamping rod 501. The bottom of the rubber friction pad 508 is in close contact with the top of the rigid rubber sleeve 507. Under the action of friction between the rubber friction pad 508 and the rigid rubber sleeve 507, the second ruler 2 can be clamped. The ruler 2 is fixed in place. A rectangular cavity 502 is provided on the second ruler 2. The top of the circular hole is connected to the bottom of the rectangular cavity 502. The clamping rod 501 is slidably sleeved in the rectangular cavity 502. A compression spring 505 in a compressed state is fixedly connected between the top of the clamping rod 501 and the top inner wall of the rectangular cavity 502. The compression spring 505 in a compressed state always exerts a downward squeezing force on the clamping rod 501, so that the rubber friction rubber 508 and the hard rubber sleeve 507 can always be tightly fitted. To improve stability, a push rod 504 is fixedly connected to the left side of the clamping rod 501. The left end of the push rod 504 extends to the left side of the second ruler 2. The second ruler 2 is slidably sleeved on the push rod 504. A first sliding hole is provided on the left inner wall of the rectangular cavity 502. The front and rear sides of the push rod 504 are in movable contact with the front and rear inner walls of the first sliding hole, respectively. The first sliding hole provides the push rod 504 with a movable distance. The push rod 504 is designed to drive the clamping rod 501 to move vertically.

[0027] Two limiting rings 503 are fixedly sleeved on the support shaft 506. The front and rear sides of the second ruler 2 are in movable contact with the sides of the two limiting rings 503 that are close to each other. The limiting rings 503 are used to restrict the second ruler 2. A thickness detection mechanism 3 for measuring the thickness of concrete is embedded in the top of the second ruler 2. The thickness detection mechanism 3 includes a conical rod 301. The front side of the conical rod 301 is provided with a third scale line. A rectangular groove 303 is opened at the top of the second ruler 2. The conical rod 301 is slidably sleeved in the rectangular groove 303. The top left side of the conical rod 301 is tightly closed. A T-shaped fixing bolt 304 is in close contact with the second ruler 2, which is threaded onto the T-shaped fixing bolt 304. A second bolt hole is provided on the left inner wall of the rectangular groove 303, and the second bolt hole is threaded onto the T-shaped fixing bolt 304. Under the frictional force between the T-shaped fixing bolt 304 and the conical rod 301, the conical rod 301 is fixedly fixed. A push block 302 is fixedly connected to the bottom left side of the conical rod 301. The left side of the push block 302 extends to the left side of the second ruler 2, and the second ruler 2 is slidably fitted onto the push block 302. The rectangular groove 303... A second sliding hole is provided on the inner left side of the second ruler 302. The front and rear inner walls of the second sliding hole are in movable contact with the front and rear sides of the push block 302, respectively. The second sliding hole provides the push block 302 with a movable distance. A limiting block 305 is fixedly connected to the top left side of the second ruler 2. Through the cooperation of the cone rod 301, the limiting block 305 and the push block 302, the thickness of the laid thermal insulation mortar and concrete layer can be measured. The measurement principle is mentioned in the announcement number: CN210533348U, and will not be elaborated here. This utility model uses a series of The structure allows for adjustment of the tilt angle of the second ruler 2 according to usage needs, enabling the measurement of the distance between two buildings. The measuring tape 4 allows for measurement of longer distances in construction projects. The integrated design of the measuring tape 4, the second ruler 2 with adjustable tilt angle, and the first ruler 1 allows for the measurement of short distances, long distances, and angles in construction projects, increasing the versatility of the measuring ruler. Furthermore, the second ruler 2 can be rotated and stored in the storage slot 101, thereby reducing the overall size of the device and making it easy to carry.

[0028] Working principle: When in use, the thickness of the building wall can be measured by the first ruler 1 and the second ruler 2. At the same time, the thickness detection mechanism 3 can measure the thickness of the laid thermal insulation mortar and concrete layer. The measurement principle is mentioned in the announcement number: CN210533348U, and will not be elaborated here. With the level 6, the horizontal condition of the wall can be measured.

[0029] When measuring the relative angle between two buildings, first align the first ruler 1 horizontally with one of the buildings. Then, push the push rod 504 upwards. The push rod 504 moves the clamping rod 501 upwards, compressing the compression spring 505. Simultaneously, the clamping rod 501 causes the rubber friction pad 508 to separate upwards from the rigid rubber sleeve 507, releasing the fixation on the second ruler 2. The second ruler 2 can then be rotated. The second ruler 2 rotates on the rigid rubber sleeve 507 until it is horizontally aligned with the other building. Stop rotating the second ruler 2 and release the push force on the push rod 504. The compression spring 505, which is in a compressed state, causes the clamping rod 501 to move downward. The clamping rod 501 causes the rubber friction pad 508 to move downward until it is in close contact with the outside of the hard rubber sleeve 507. Under the action of friction between the rubber friction pad 508 and the hard rubber sleeve 507, the second ruler 2 can be fixed. At this time, the angle between the two buildings can be read by observing the scale value indicated by the two pointers 7 on the circular scale line 407. When it is necessary to measure the two vertical lines again, the push rod 504 can be pushed upward again to release the fixation of the second ruler 2. The second ruler 2 can be rotated to be perpendicular to the first ruler 1, and the two vertical lines can be measured.

[0030] When measuring a longer distance, first rotate the T-shaped clamping bolt 409 in the reverse direction. As the T-shaped clamping bolt 409 rotates, it gradually separates from the circular box 401, releasing the fixing of the knob 408. At this point, pull the pull ring to the left to move the arc-shaped limit block 405 and pull the measuring tape 403. Under the pulling force, the winding shaft 402 rotates to release the measuring tape 403. When the measuring tape 403 is pulled to the required length, the length of the long distance can be measured using the measuring tape 403. After measurement, rotate the knob 408 in the reverse direction to rotate the winding shaft 402. As the winding shaft 402 rotates, it winds up the measuring tape 403. Under the winding force, the measuring tape 403 moves between the two rubber strips and rubs against them. Under the friction, the dust and dirt adhering to the measuring tape 403 can be removed. Wiping away dirt improves the cleanliness of the measuring tape 403 during the winding process. During winding, the measuring tape 403 moves the arc-shaped limiting block 405. When the arc-shaped limiting block 405 is attracted to the two third magnets, the knob 408 stops rotating and the T-shaped clamping bolt 409 rotates in the forward direction. As the T-shaped clamping bolt 409 rotates, it moves to make close contact with the front side of the circular box 401. Under the friction between the T-shaped clamping bolt 409 and the circular box 401, the winding shaft 402 is fixed, thereby fixing the measuring tape 403. By integrating the measuring tape 4, the second ruler 2 with an adjustable tilt angle, and the first ruler 1 into one unit, it is possible to measure short distances, long distances, and angles in construction engineering, improving the versatility of the measuring ruler. In addition, the integrated design makes it easy to carry.

[0031] When the device needs to be carried after use, push the lever 504 upwards again to release the fixation of the second ruler 2. Then, rotate the second ruler 2 to the right. When the second ruler 2 rotates into the storage slot 101, the second ruler 2 drives the second magnet 201 to attract the first magnet 102. Then, release the pushing force on the lever 504 so that the rubber friction rubber 508 and the hard rubber sleeve 507 make close contact, thus fixing the second ruler 2. After use, by storing the second ruler 2 in the storage slot 101, the overall size of the device is reduced, making it convenient to carry.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-purpose measuring ruler for civil engineering management, comprising a first ruler (1) and a second ruler (2), wherein the first ruler (1) has a first scale line (103) on its front side, and the second ruler (2) has a second scale line (202) on its front side, characterized in that, The top of the first ruler (1) has a storage slot (101) with an opening on the left side. The storage slot (101) cooperates with the second ruler (2). A measuring tape (4) for measuring long distances is fixedly connected to the front left side of the first ruler (1). The front side of the measuring tape (4) has a circular scale line (407). The front sides of both the first ruler (1) and the second ruler (2) are fixedly connected to pointers (7) that cooperate with the circular scale line (407). A support shaft (506) is fixedly connected to the rear side of the measuring tape (4). A rigid rubber sleeve (507) is fixedly fitted on the support shaft (506). The second ruler (2) is movably fitted on the rigid rubber sleeve (507). The top of the rigid rubber sleeve (507) is in close contact with an elastic compression mechanism (5) installed on the second ruler (2). Two limiting rings (503) are fixedly fitted on the support shaft (506). The front and rear sides of the second ruler (2) are in movable contact with the sides of the two limiting rings (503) that are close to each other. A thickness detection mechanism (3) for measuring the thickness of concrete is embedded in the top of the second ruler (2).

2. The multi-purpose measuring ruler for civil engineering management according to claim 1, characterized in that, The measuring tape (4) includes a circular box (401) fixed to the left front side of the first ruler (1). A take-up shaft (402) is rotatably mounted on the inner rear wall of the circular box (401). A measuring tape strip (403) is wound around the take-up shaft (402). A through hole (404) is provided on the inner left side of the circular box (401). One end of the measuring tape strip (403) extends through the through hole (404) to the left side of the circular box (401) and is fixedly connected to an arc-shaped limiting block (405). The other end of the measuring tape strip (403) is fixedly connected to the outer side of the take-up shaft (402). The arc-shaped limiting block (405) is magnetically fixed to the left side of the circular box (401). Inclined devices are fixedly connected to the inner top and inner bottom walls of the through hole (404). The scraper (406) is arranged symmetrically. Rubber strips are glued and fixed on the side of the two scrapers (406) that are close to each other. The side of the two rubber strips that are close to each other are in contact with the top and bottom of the measuring tape (403) respectively. A pull ring is fixedly connected to the left side of the arc-shaped limiting block (405). The front end of the winding shaft (402) extends to the front side of the circular box (401) and is fixedly connected to the knob (408). The front side of the circular box (401) is in close contact with the T-shaped clamping bolt (409). The knob (408) is threaded on the T-shaped clamping bolt (409). The annular scale line (407) is set on the front side of the circular box (401), and the support shaft (506) is fixedly installed on the rear side of the circular box (401).

3. The multi-purpose measuring ruler for civil engineering management according to claim 1, characterized in that, The elastic clamping mechanism (5) includes a clamping rod (501), with a rubber friction rubber sheet (508) bonded to the bottom end of the clamping rod (501). The bottom of the rubber friction rubber sheet (508) is in close contact with the top of the hard rubber sleeve (507). A rectangular cavity (502) is provided on the second ruler (2). The clamping rod (501) is slidably sleeved in the rectangular cavity (502). A compression spring (505) in a compressed state is fixedly connected between the top end of the clamping rod (501) and the top inner wall of the rectangular cavity (502). A push rod (504) is fixedly connected to the left side of the clamping rod (501). The left end of the push rod (504) extends to the left side of the second ruler (2). The second ruler (2) is slidably sleeved on the push rod (504).

4. The multi-purpose measuring ruler for civil engineering management according to claim 1, characterized in that, The thickness detection mechanism (3) includes a conical rod (301), a third scale line on the front side of the conical rod (301), a rectangular groove (303) on the top of the second ruler (2), the conical rod (301) is slidably sleeved in the rectangular groove (303), a T-shaped fixing bolt (304) is tightly contacted on the top left side of the conical rod (301), the second ruler (2) is threadedly sleeved on the T-shaped fixing bolt (304), a push block (302) is fixedly connected to the bottom left side of the conical rod (301), the left side of the push block (302) extends to the left side of the second ruler (2), the second ruler (2) is slidably sleeved on the push block (302), and a limit block (305) is fixedly connected to the top left side of the second ruler (2).

5. A multi-purpose measuring ruler for civil engineering management according to claim 1, characterized in that, A first magnet (102) is embedded and fixed on the bottom inner wall of the storage slot (101), and a second magnet (201) is embedded and fixed on the right side of the second ruler (2). The first magnet (102) and the second magnet (201) cooperate with each other, and a level (6) for measuring the levelness is fixedly connected to the front side of the first ruler (1).

6. A multi-purpose measuring ruler for civil engineering management according to claim 3, characterized in that, The second ruler (2) has a circular hole at the bottom front side. The top of the circular hole is connected to the bottom of the rectangular cavity (502), and the inner wall of the circular hole is in contact with the outer side of the hard rubber sleeve (507).

7. A multi-purpose measuring ruler for civil engineering management according to claim 2, characterized in that, Two third magnets are embedded and fixed on the left side of the circular box (401). The arc-shaped limiting block (405) is made of iron. The right side of the arc-shaped limiting block (405) is attracted to the left side of the two third magnets.

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