Building construction plumb aligner

Abstract

The invention discloses a building construction plumb aligner, and belongs to the technical field of building construction plumb aligner equipment, the building construction plumb aligner comprises a tripod butt joint seat and a plumb aligner body, the upper end of the tripod butt joint seat is fixedly connected with a lock catch, and the upper part of the lock catch is movably connected with a first leveling seat; the side portion of the first leveling base is evenly and rotationally connected with telescopic balance rods, the upper portion of the first leveling base is movably connected with a second leveling base, the first leveling base moves along the lock catch, then the first leveling base is automatically leveled through the lock catch, and after the first leveling base is static, the lock catch is operated to lock the first leveling base. During leveling, the first leveling seat is kept in position, then the gradienter is observed, the threaded adjusting column is screwed for small-amplitude fine adjustment, the facing angle of the second leveling seat is changed through the threaded adjusting column, operation of the threaded adjusting column is stopped until bubbles of the gradienter are located in the center of the gradienter, and the leveling efficiency is improved compared with a conventional plumb aligner.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction plumbing equipment, and in particular relates to a building construction plumbing instrument. Background Art

[0002] A plumb line uses a visible laser that coincides with the sighting axis to generate an upward plumb line, which is used to measure small deviations relative to the plumb line and to position and transfer the plumb line. Plumbs are widely used in the construction and installation of high-rise buildings, towers, chimneys, elevators, and large-scale equipment. When a conventional plumb line is used, it is installed on a tripod that is unfolded on the target. The level of the plumb line is initially adjusted through the tripod until the bubble of the level breaks away from the edge, and then the plumb line body is further leveled.

[0003] After the initial adjustment of the tripod, the horizontal deviation of the plumb line is still relatively large, and the range of fine-tuning using the leveling structure of the plumb line body is still large, and the range that needs to be repeatedly corrected is also relatively large, resulting in the problem that the base amplitude deviation of the conventional plumb line fine-tuning is relatively large and the adjustment efficiency is relatively low.

[0004] Therefore, we propose a construction plumb line instrument to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the reference amplitude deviation of the conventional plumb line fine adjustment is relatively large and the adjustment efficiency is relatively low, and to propose a plumb line for construction.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A plumb line instrument for construction includes a tripod docking seat and a plumb line instrument body, wherein the upper end of the tripod docking seat is fixedly connected with a lock buckle, the upper part of the lock buckle is movably connected with a first leveling seat, the side of the first leveling seat is evenly rotatably connected with a telescopic balance rod, the upper part of the first leveling seat is movably connected with a second leveling seat, threaded adjustment columns are evenly arranged between the first leveling seat and the second leveling seat, the upper part of the threaded adjustment column is threadedly installed in the second leveling seat, and the threaded adjustment column passes through the second leveling seat, the lower end of the threaded adjustment column is movably contacted with the first leveling seat, and the upper end of the first leveling seat is fixedly connected with a spirit level. After the tripod docking seat is docked on the target tripod, the telescopic balance rod is made to sag due to gravity, and the first leveling seat is used to limit the sagging range of the telescopic balance rod so that the telescopic balance rod is made to sag below the plane of the first leveling seat, and gravity is used to make the telescopic balance rod slide down and extend, and the extended telescopic balance rod is used to increase the length of the balancing force lever, and the gravity is used to act on the telescopic balance rod so that the telescopic balance rod acts on the first leveling seat, so that the first leveling seat moves along the lock buckle, and then the first leveling seat is automatically leveled by the lock buckle, and after the first leveling seat is stationary, the first leveling seat is locked by the operation lock buckle to keep the first leveling seat in position, and then the spirit level is observed, and the threaded adjustment column is screwed for small fine adjustments, and the facing angle of the second leveling seat is changed by the threaded adjustment column, and the bubble of the spirit level is stopped after being located at the center of the spirit level, thereby improving the leveling efficiency compared with the conventional plumb line.

[0008] Preferably, an elastic rotation-limiting column is provided between the tripod docking seat and the first leveling seat, and three pairs of the elastic rotation-limiting columns are provided. The lower ends of the elastic rotation-limiting columns are fixedly connected to the upper ends of the tripod docking seat, and the upper ends of the elastic rotation-limiting columns are movably blocked on the outer side of the first leveling seat. The elastic rotation-limiting columns are movably blocked on the upper part of the first leveling seat to prevent the first leveling seat from rotating significantly, thereby ensuring the stability of the angle of the first leveling seat.

[0009] Preferably, a handle is fixedly connected to the upper part of the plumb line body, so that the plumb line body can be conveniently operated by hand.

[0010] Preferably, the lock comprises a first hemispherical block, a second hemispherical block, a nut, a bolt, a first elastic seat, a second elastic seat and a fixed seat, the first hemispherical block is fixedly connected to the upper end of the second elastic seat, the second elastic seat is fixedly connected to the upper end of the fixed seat, the lower end of the second hemispherical block is fixedly connected to the upper end of the first elastic seat, the lower end of the first elastic seat is fixedly connected to the upper end of the fixed seat, the nut passes through the first elastic seat, the nut and the first elastic seat are fixed to each other, the bolt thread is installed inside the nut, and the bolt passes through the nut, and the bolt is in active contact with the second elastic seat. When the first leveling seat is stationary, the bolt is screwed toward the direction of the second elastic seat, and the second elastic seat is squeezed by the bolt to open the first elastic seat and the second elastic seat, and the second hemispherical block and the first hemispherical block are driven to open through the first elastic seat and the second elastic seat, and the first leveling seat is pressed outwardly and fixed by the first hemispherical block and the second hemispherical block, so as to facilitate locking or loosening the first leveling seat.

[0011] Preferably, the lock buckle further comprises a first knob, which is fixedly connected to an end of the bolt facing away from the nut. The first knob is used to increase the length of the screwing lever of the bolt, thereby facilitating manual operation of the bolt rotation.

[0012] Preferably, the first leveling seat comprises a first connecting sleeve, a first seat body, a bearing seat and a second connecting sleeve, a limiting groove is provided at the lower end of the side of the first seat body, the lower end of the first connecting sleeve is fixedly connected to the upper end of the first seat body, three pairs of bearing seats are provided, the bearing seat is fixedly connected to the outer end of the first seat body, three limiting grooves are provided, and the upper end of the second connecting sleeve is fixedly connected to the lower end of the first seat body. When the balancing force of the telescopic balance rod acts on the bearing seat, the bearing seat acts on the first seat body, so that the first seat body drives the second connecting sleeve to move along the first hemispherical block and the second hemispherical block until the first seat body is stationary, and then the lock is operated to lock the first leveling seat, which facilitates the automatic leveling of the first leveling seat.

[0013] Preferably, the telescopic balance bar comprises a weight, a telescopic rod, a rotating shaft and a limit block, the lower end of the weight is fixedly connected to the upper end of the telescopic rod, the lower end of the telescopic rod is fixedly connected to the upper end of the rotating shaft, and the limit block is fixedly connected to the lower outer end of the telescopic rod. The weight of the weight acts on the telescopic rod, so that the weight drives the telescopic rod to swing downward around the rotating shaft until the limit block is stuck in the limit slot, and the limit slot is used to limit the telescopic balance bar from continuing to droop, so that the weight droops to the lower side of the first seat body, and the weight of the weight acts on the telescopic rod so that the telescopic rod extends outward, increasing the length of the drooping force lever of the weight, and the weight of the weight acts on the first seat body through the telescopic rod, so as to facilitate the leveling of the first leveling seat.

[0014] Preferably, the second leveling seat comprises a second seat body, a threaded sleeve and a spherical block, the lower end of the second seat body is fixedly connected to the upper end of the spherical block, the threaded sleeve is evenly fixedly connected to the outer end of the second seat body, and three threaded sleeves are provided. When the threaded adjustment column pushes up one side of the second seat body, the second seat body deflects to the other side around the center of the spherical block, so that the threaded adjustment column can control and adjust the second leveling seat.

[0015] Preferably, the threaded adjustment column includes a threaded column and a hemispherical block, and the lower end of the threaded column is fixedly connected to the upper end of the hemispherical block. The other two threaded adjustment columns are loosened, and the remaining threaded adjustment columns are tightened, so that the threaded column drives the threaded sleeve to tilt upward, and the remaining threaded adjustment columns are adjusted in the same way until the bubble of the level is located in the center and then the adjustment is stopped, so as to facilitate fine-tuning the levelness of the second leveling seat.

[0016] Preferably, the threaded adjustment column further comprises a second knob, which is fixedly connected to the lower outer end of the threaded column. The second knob is used to increase the length of the screwing lever of the threaded column, thereby facilitating manual operation of rotating the threaded adjustment column.

[0017] In summary, the technical effects and advantages of the present invention are as follows:

[0018] 1. After the tripod docking seat is docked on the target tripod, the telescopic balance rod is made to sag by gravity, and the first leveling seat is used to limit the sagging range of the telescopic balance rod, so that the telescopic balance rod is made to sag below the plane of the first leveling seat, and the telescopic balance rod is made to slide down and extend by gravity, and the length of the balancing force lever is increased by the extended telescopic balance rod, and the gravity is used to act on the telescopic balance rod, so that the telescopic balance rod acts on the first leveling seat, so that the first leveling seat moves along the lock buckle, and then the first leveling seat is automatically leveled by the lock buckle, and after the first leveling seat is stationary, the first leveling seat is locked by the operation lock buckle to keep the first leveling seat in position, and then the level is observed, and the threaded adjustment column is screwed for small fine adjustments, and the facing angle of the second leveling seat is changed by the threaded adjustment column, until the bubble of the level is located at the center of the level, and then the threaded adjustment column is stopped, which improves the leveling efficiency compared with the conventional plumb line.

[0019] 2. The elastic limit rotation column is used to movably block the upper part of the first leveling seat to prevent the first leveling seat from rotating significantly, thereby ensuring the stability of the angle of the first leveling seat.

[0020] 3. When the first leveling seat is stationary, screw the bolt in the direction of the second elastic seat, use the bolt to squeeze the second elastic seat, so that the first elastic seat and the second elastic seat are opened, and the second hemispherical block and the first hemispherical block are driven to open through the first elastic seat and the second elastic seat, and the first leveling seat is pressed outward and fixed through the first hemispherical block and the second hemispherical block, so as to facilitate locking or loosening of the first leveling seat.

[0021] 4. When the balancing force of the telescopic balance rod acts on the bearing seat, it acts on the first seat body through the bearing seat, so that the first seat body drives the second connecting sleeve to move along the first hemispherical block and the second hemispherical block until the first seat body is stationary, and then the lock is operated to lock the first leveling seat, which facilitates the automatic leveling of the first leveling seat.

[0022] 5. Use the gravity of the weight block to act on the telescopic rod, so that the weight block drives the telescopic rod to swing downward around the rotating axis until the limit block is stuck in the limit groove, and use the limit groove to limit the telescopic balance rod from continuing to sag, so that the weight block sags to the lower side of the first seat body, and use the gravity of the weight block to act on the telescopic rod to make the telescopic rod extend outward, thereby increasing the length of the lever of the sagging force of the weight block. The gravity of the weight block acts on the first seat body through the telescopic rod, so as to facilitate the leveling of the first leveling seat.

[0023] 6. Loosen the other two threaded adjustment columns, and then tighten the remaining threaded adjustment column to make the threaded column drive the threaded sleeve to tilt upward. Similarly, adjust the remaining threaded adjustment columns until the bubble of the spirit level is in the center and stop adjusting to facilitate fine-tuning the levelness of the second leveling seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the lock structure of the present invention;

[0026] Figure 3 It is a schematic structural diagram of the first leveling seat of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the telescopic balance rod of the present invention;

[0028] Figure 5 It is a schematic structural diagram of the second leveling seat of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the threaded adjustment column of the present invention.

[0030] In the figure: 1. tripod docking seat; 2. lock; 3. first leveling seat; 4. telescopic balance rod; 5. second leveling seat; 6. threaded adjustment column; 7. elastic limit rotation column; 8. spirit level; 9. handle; 10. plumb body; 21. first hemispherical block; 22. second hemispherical block; 23. nut; 24. bolt; 25. first knob; 26. first elastic seat; 27. second elastic seat; 28. fixed seat; 31. first connecting sleeve; 32. first seat body; 33. bearing seat; 34. limiting groove; 35. second connecting sleeve; 41. weight block; 42. telescopic rod; 43. rotating shaft; 44. limiting block; 51. second seat body; 52. threaded sleeve; 53. spherical block; 61. threaded column; 62. second knob; 63. hemispherical spherical block. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments.

[0032] Reference Figure 1 A vertical plumb instrument for construction includes a tripod docking seat 1 and a vertical plumb instrument body 10, a lock buckle 2 is fixedly connected to the upper end of the tripod docking seat 1, a first leveling seat 3 is movably connected to the upper part of the lock buckle 2, a telescopic balance rod 4 is evenly rotatably connected to the side of the first leveling seat 3, a second leveling seat 5 is movably connected to the upper part of the first leveling seat 3, threaded adjustment columns 6 are evenly arranged between the first leveling seat 3 and the second leveling seat 5, the upper part of the threaded adjustment column 6 is threadedly installed in the second leveling seat 5, and the threaded adjustment column 6 passes through the second leveling seat 5, the lower end of the threaded adjustment column 6 is movably contacted with the first leveling seat 3, and a spirit level 8 is fixedly connected to the upper end of the first leveling seat 3.

[0033] Reference Figure 1 An elastic limit rotation column 7 is provided between the tripod docking seat 1 and the first leveling seat 3. Three pairs of elastic limit rotation columns 7 are provided. The lower ends of the elastic limit rotation columns 7 are fixedly connected to the upper ends of the tripod docking seat 1. The upper ends of the elastic limit rotation columns 7 are movably blocked at the outer side of the first leveling seat 3. The elastic limit rotation columns 7 are movably blocked at the upper part of the first leveling seat 3 to prevent the first leveling seat 3 from rotating significantly.

[0034] Reference Figure 1 A handle 9 is fixedly connected to the upper part of the plumb line instrument body 10. The handle 9 is used for holding and operating the plumb line instrument body 10.

[0035] Reference Figure 1 and 2The lock buckle 2 includes a first hemispherical block 21, a second hemispherical block 22, a nut 23, a bolt 24, a first elastic seat 26, a second elastic seat 27 and a fixed seat 28. The first hemispherical block 21 is fixedly connected to the upper end of the second elastic seat 27, the second elastic seat 27 is fixedly connected to the upper end of the fixed seat 28, the lower end of the second hemispherical block 22 is fixedly connected to the upper end of the first elastic seat 26, the lower end of the first elastic seat 26 is fixedly connected to the upper end of the fixed seat 28, and the lower end of the fixed seat 28 is fixedly connected to the upper end of the tripod docking seat 1. The nut 23 passes through the first elastic seat 26, the nut 23 and the first elastic seat 26 are fixed to each other, the bolt 24 is threadedly installed inside the nut 23, and the bolt 24 passes through the nut 23, and the bolt 24 is in active contact with the second elastic seat 27. When the first leveling seat 3 is stationary, the bolt 24 is screwed toward the second elastic seat 27, and the second elastic seat 27 is squeezed by the bolt 24 to open the first elastic seat 26 and the second elastic seat 27, and the second hemispherical block 22 and the first hemispherical block 21 are driven to open through the first elastic seat 26 and the second elastic seat 27, and the first leveling seat 3 is pressed outward and fixed through the first hemispherical block 21 and the second hemispherical block 22.

[0036] Reference Figure 1 and 2 The lock buckle 2 further includes a first knob 25, which is fixedly connected to one end of the bolt 24 facing away from the nut 23. The first knob 25 is used to increase the screwing lever length of the bolt 24.

[0037] Reference Figure 1 , 2 And 3, the first leveling seat 3 includes a first connecting sleeve 31, a first seat body 32, a bearing seat 33 and a second connecting sleeve 35. The lower end of the side of the first seat body 32 is provided with a limiting groove 34. The second connecting sleeve 35 is movably sleeved on the outside of the first hemispherical block 21 and the second hemispherical block 22. The spirit level 8 is fixedly connected to the upper end of the first seat body 32. The elastic limiting column 7 is blocked on the outside of the first seat body 32. The lower end of the first connecting sleeve 31 is fixedly connected to the upper end of the first seat body 32. The bearing seat 33 is provided with three pairs. The bearing seat 33 is fixedly connected to the outer end of the first seat body 32. There are three limiting grooves 34. The upper end of the second connecting sleeve 35 is fixedly connected to the lower end of the first seat body 32. When the balancing force of the telescopic balancing rod 4 acts on the bearing seat 33, it acts on the first seat body 32 through the bearing seat 33, so that the first seat body 32 drives the second connecting sleeve 35 to move along the first hemispherical block 21 and the second hemispherical block 22 until the first seat body 32 is stationary, and then the lock buckle 2 is operated to lock the first leveling seat 3.

[0038] Reference Figure 1 , 34, the telescopic balance rod 4 includes a weight block 41, a telescopic rod 42, a rotating shaft 43 and a limit block 44, the rotating shaft 43 is rotatably connected to the inside of the bearing seat 33, the limit block 44 is movably engaged with the limit groove 34, the lower end of the weight block 41 is fixedly connected to the upper end of the telescopic rod 42, the lower end of the telescopic rod 42 is fixedly connected to the upper end of the rotating shaft 43, and the limit block 44 is fixedly connected to the lower outer end of the telescopic rod 42. The gravity of the weight block 41 is used to act on the telescopic rod 42, so that the weight block 41 drives the telescopic rod 42 to swing downward around the rotating shaft 43 until the limit block 44 is stuck in the limit groove 34, and the limit groove 34 is used to limit the telescopic balance rod 4 from continuing to sag, so that the weight block 41 sags to the lower side of the first seat body 32, and the gravity of the weight block 41 is used to act on the telescopic rod 42, so that the telescopic rod 42 extends outward, increasing the length of the downward force lever of the weight block 41, and the gravity of the weight block 41 acts on the first seat body 32 through the telescopic rod 42.

[0039] Reference Figure 1 , 3 5, the second leveling seat 5 includes a second seat body 51, a threaded sleeve 52 and a spherical block 53. The lower end of the plummet body 10 is fixedly connected to the upper end of the second seat body 51, the spherical block 53 is movably clamped in the first connecting sleeve 31, the lower end of the second seat body 51 is fixedly connected to the upper end of the spherical block 53, the threaded sleeve 52 is evenly fixedly connected to the outer end of the second seat body 51, and three threaded sleeves 52 are provided. When the threaded adjustment column 6 pushes up one side of the second seat body 51, the second seat body 51 is deflected to the other side around the center of the spherical block 53.

[0040] Reference Figure 1 , 3 , 5 and 6, the threaded adjustment column 6 includes a threaded column 61 and a hemispherical block 63, the threaded column 61 is threadedly installed in the spherical block 53, the lower end of the hemispherical block 63 is in active contact with the first seat body 32, and the lower end of the threaded column 61 is fixedly connected to the upper end of the hemispherical block 63. Loosen the other two threaded adjustment columns 6, and then tighten the remaining threaded adjustment columns 6, so that the threaded column 61 drives the threaded sleeve 52 to tilt upward, and adjust the remaining threaded adjustment columns 6 in the same way until the bubble of the level 8 is located at the center and then stop adjusting.

[0041] Reference Figure 1 and 6 The threaded adjusting column 6 further includes a second knob 62, which is fixedly connected to the lower outer end of the threaded column 61. The second knob 62 is used to increase the screwing lever length of the threaded column 61.

[0042] Working principle: after the tripod docking seat 1 is docked on the target tripod, the telescopic balance rod 4 is allowed to sag due to gravity, and the first leveling seat 3 is used to limit the sagging range of the telescopic balance rod 4, so that the telescopic balance rod 4 sags below the plane of the first leveling seat 3, and gravity is used to make the telescopic balance rod 4 slide down and extend, and the extended telescopic balance rod 4 is used to increase the length of the balancing force lever, and the gravity is used to act on the telescopic balance rod 4, so that the telescopic balance rod 4 acts on the first leveling seat 3, so that the first leveling seat 3 moves along the lock buckle 2, and then the first leveling seat 3 is automatically leveled by the lock buckle 2, and after the first leveling seat 3 is stationary, the first leveling seat 3 is locked by operating the lock buckle 2 to keep the first leveling seat 3 in position, and then the spirit level 8 is observed, and the threaded adjustment column 6 is screwed for small fine adjustments, and the facing angle of the second leveling seat 5 is changed by the threaded adjustment column 6, until the bubble of the spirit level 8 is located at the center of the spirit level 8 and then the threaded adjustment column 6 is stopped, so as to achieve the purpose of small-amplitude fine-tuning of the final level under the condition of relative level.

[0043] The above description is only a preferred specific implementation manner of the invention, but the protection scope of the invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the invention according to the technical scheme and inventive concept of the invention, which should be covered by the protection scope of the invention.

[0044] The description briefly mentions the application direction of the invention for the prior art known to those skilled in the art and without making changes, which is combined with the invention to form a complete technology; the description avoids over-popularizing the technology familiar to those skilled in the art to assist them in quickly understanding the main content of the invention.

Claims

1. A plumb line instrument for construction, comprising a tripod docking seat (1) and a plumb line instrument body (10), characterized in that: The upper end of the tripod docking seat (1) is fixedly connected with a lock buckle (2), the upper part of the lock buckle (2) is movably connected with a first leveling seat (3), the side of the first leveling seat (3) is evenly rotatably connected with a telescopic balance rod (4), the upper part of the first leveling seat (3) is movably connected with a second leveling seat (5), and threaded adjustment columns (6) are evenly arranged between the first leveling seat (3) and the second leveling seat (5), the upper part of the threaded adjustment column (6) is threadedly installed in the second leveling seat (5), and the threaded adjustment column (6) passes through the second leveling seat (5), the lower end of the threaded adjustment column (6) is movably contacted with the first leveling seat (3), and the upper end of the first leveling seat (3) is fixedly connected with a spirit level (8).

2. A construction plumb line instrument according to claim 1, characterized in that: An elastic force limiting rotation column (7) is provided between the tripod docking seat (1) and the first leveling seat (3), and three pairs of the elastic force limiting rotation columns (7) are provided. The lower ends of the elastic force limiting rotation columns (7) are fixedly connected to the upper ends of the tripod docking seat (1), and the upper ends of the elastic force limiting rotation columns (7) are movably blocked on the outside of the first leveling seat (3).

3. A construction plumb line instrument according to claim 1, characterized in that: A handle (9) is fixedly connected to the upper part of the plumb line instrument body (10).

4. A construction plumb line instrument according to claim 1, characterized in that: The lock buckle (2) comprises a first hemispherical block (21), a second hemispherical block (22), a nut (23), a bolt (24), a first elastic seat (26), a second elastic seat (27) and a fixed seat (28); the first hemispherical block (21) is fixedly connected to the upper end of the second elastic seat (27); the second elastic seat (27) is fixedly connected to the upper end of the fixed seat (28); the lower end of the second hemispherical block (22) is fixedly connected to the upper end of the first elastic seat (26); the lower end of the first elastic seat (26) is fixedly connected to the upper end of the fixed seat (28); the nut (23) passes through the first elastic seat (26); the nut (23) and the first elastic seat (26) are fixed to each other; the bolt (24) is threadedly mounted inside the nut (23); the bolt (24) passes through the nut (23); and the bolt (24) is in active contact with the second elastic seat (27).

5. A construction plumb line instrument according to claim 4, characterized in that: The lock buckle (2) further comprises a first knob (25), wherein the first knob (25) is fixedly connected to an end of the bolt (24) facing away from the nut (23).

6. A construction plumb line instrument according to claim 1, characterized in that: The first leveling seat (3) comprises a first connecting sleeve (31), a first seat body (32), a bearing seat (33) and a second connecting sleeve (35); a limiting groove (34) is provided at the lower end of the side of the first seat body (32); the lower end of the first connecting sleeve (31) is fixedly connected to the upper end of the first seat body (32); three pairs of bearing seats (33) are provided; the bearing seats (33) are fixedly connected to the outer end of the first seat body (32); three limiting grooves (34) are provided; and the upper end of the second connecting sleeve (35) is fixedly connected to the lower end of the first seat body (32).

7. A construction plumb line instrument according to claim 1, characterized in that: The telescopic balance rod (4) comprises a weight block (41), a telescopic rod (42), a rotating shaft (43) and a stop block (44); the lower end of the weight block (41) is fixedly connected to the upper end of the telescopic rod (42); the lower end of the telescopic rod (42) is fixedly connected to the upper end of the rotating shaft (43); and the stop block (44) is fixedly connected to the lower outer end of the telescopic rod (42).

8. The construction plumb line instrument according to claim 1, characterized in that: The second leveling seat (5) comprises a second seat body (51), a threaded sleeve (52) and a spherical block (53); the lower end of the second seat body (51) is fixedly connected to the upper end of the spherical block (53); the threaded sleeve (52) is evenly fixedly connected to the outer end of the second seat body (51); and three threaded sleeves (52) are provided.

9. A construction plumb line instrument according to claim 1, characterized in that: The threaded adjustment column (6) comprises a threaded column (61) and a hemispherical block (63), and the lower end of the threaded column (61) is fixedly connected to the upper end of the hemispherical block (63).

10. A construction plumb line instrument according to claim 9, characterized in that: The threaded adjustment column (6) further comprises a second knob (62), wherein the second knob (62) is fixedly connected to the lower outer end of the threaded column (61).

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