Measuring device for flatness of building curtain wall

Abstract

The invention relates to the technical field of flatness detection, and particularly discloses a building curtain wall flatness measuring device. Comprising a first fixing frame, a display panel is installed on the first fixing frame, the first fixing frame is rotatably provided with a connecting plate, the connecting plate is slidably connected with a second fixing frame, and cavities are formed in the middle of the first fixing frame and the middle of the second fixing frame; sliding blocks are arranged in cavities of the first fixing frame and the second fixing frame in a sliding mode, the sliding blocks are used for measuring the flatness of a curtain wall to be measured, and the first fixing frame and the second fixing frame are jointly provided with a driving mechanism used for controlling the two sliding blocks to move synchronously. The first fixing frame and the second fixing frame are jointly provided with a limiting mechanism. The sliding blocks are controlled to move, so that the two sliding blocks are retracted into the first fixing frame and the second fixing frame correspondingly, and deformation of the sliding blocks in the unused state is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of flatness detection, and in particular relates to a device for measuring the flatness of a building curtain wall. Background Art

[0002] Testing the flatness of building curtain walls is crucial for ensuring their appearance quality and installation accuracy. Flatness refers to the deviation of the actual position of a curtain wall component relative to its design axis within a specified linear length. This indicator not only directly impacts the overall visual aesthetics of the curtain wall but also the proper functioning of subsequent construction equipment, making it a key parameter for curtain wall project quality control.

[0003] Currently, the industry generally uses a straightedge applied to the curtain wall surface to be tested and a feeler gauge to measure local gaps. This method is simple to use, low-cost, and widely used on construction sites. However, in complex construction environments, the straightedge is prone to deformation due to frequent handling and use. Once the straightedge itself is deformed, when used in conjunction with a feeler gauge, it will inevitably lead to distorted measurement data, affecting the accuracy and consistency of the overall inspection results. Furthermore, if tool deformation is not promptly detected during continuous measurement, the risk of error accumulation is further exacerbated. Summary of the Invention

[0004] In order to overcome the above-mentioned problems, the present invention provides a device for measuring the flatness of a building curtain wall.

[0005] The technical solution of the present invention is: a device for measuring the flatness of a building curtain wall, comprising a first fixed frame, a display panel mounted on the first fixed frame, a connecting plate rotatably provided on the first fixed frame, and a second fixed frame slidably connected to the connecting plate, a chamber being provided in the middle of each of the first fixed frame and the second fixed frame; sliding blocks are slidably provided in the chambers of each of the first fixed frame and the second fixed frame, the sliding blocks being used to measure the flatness of the curtain wall to be measured, the first fixed frame and the second fixed frame being jointly provided with a driving mechanism for controlling the synchronous movement of the two sliding blocks, the first fixed frame and the second fixed frame being jointly provided with a limiting mechanism, the limiting mechanism being used for mutual limiting between the first fixed frame and the second fixed frame.

[0006] Furthermore, the driving mechanism includes a plurality of telescopic push rods, and the plurality of telescopic push rods are divided into two groups. The two groups of telescopic push rods are respectively fixed in the cavity of the first fixed frame and the cavity of the second fixed frame. The telescopic ends of the telescopic push rods are fixed to the adjacent sliding blocks. The first fixed frame and the second fixed frame are both fixed with elastic telescopic rods. The chambers of the elastic telescopic rods are connected to the chambers of the corresponding telescopic push rods through pipes, and the chambers of the telescopic push rods, the chambers of the elastic telescopic rods and the pipes connecting the two are all filled with liquid media.

[0007] Furthermore, the limiting mechanism includes a sliding frame, which is slidably set on the first fixed frame, a first spring is fixed between the sliding frame and the first fixed frame, and the second fixed frame is fixed with a first fixed block, and the first fixed block is provided with a limiting slot. When the sliding frame is located in the limiting slot of the first fixed block, the first fixed frame and the second fixed frame are in the same straight line.

[0008] Furthermore, the second fixed frame is slidably provided with an insertion rod, the insertion rod is provided with a notch, the first fixed frame is provided with a blind hole, the blind hole is used to limit the insertion rod, the first fixed frame is slidably provided with a limiting member, a first tension spring is fixed between the limiting member and the first fixed frame, and the limiting member is used to limit the insertion rod.

[0009] Furthermore, it also includes two second fixed blocks, which are respectively fixed to the first fixed frame and the second fixed frame. The second fixed block is rotatably provided with a rotating rod, and the rotating rod is limitedly slidably provided with a sliding rod. A second spring is fixed between the sliding rod and the adjacent rotating rod, and the sliding rod is fixed with a fixed rod.

[0010] Furthermore, one of the fixed rods is slidably provided with a sliding sleeve, a third spring is fixedly connected between the sliding sleeve and the corresponding fixed rod, and the sliding sleeve is used to limit the two fixed rods.

[0011] Furthermore, the sliding rod is fixedly connected to a fixing sleeve, and the fixing sleeve is fixedly connected to an L-shaped rod.

[0012] Furthermore, both the fixing sleeve and the L-shaped rod are provided with balls.

[0013] Furthermore, it also includes: two fixed shells, which are respectively fixed to the side surfaces of the first fixed frame and the second fixed frame; two sliding plates, which are respectively slidably arranged in adjacent fixed shells, and the fixed shells are slidingly provided with limiting columns, and a second tension spring is fixed between the limiting columns and the adjacent fixed shells, and the sliding plates are provided with multiple limiting holes, and the limiting columns are inserted into adjacent limiting holes to limit the corresponding sliding plates.

[0014] Furthermore, the first fixing frame and the second fixing frame are both fixed with an L-shaped plate.

[0015] The beneficial effects are as follows: the present invention controls the movement of the sliding blocks so that the two sliding blocks are retracted into the first fixed frame and the second fixed frame respectively, thereby avoiding deformation of the sliding blocks when not in use, thereby ensuring the measurement accuracy when in use; through the setting of the fixed rod, a comfortable gripping position is provided. Such a design allows users to be more comfortable when performing curtain wall flatness detection, reduces fatigue caused by long-term gripping, and thus helps to maintain measurement stability and accuracy; through the multi-point support formed by the sliding rod and the L-shaped rod, combined with the relative sliding between the rotating rod and the sliding rod, it is convenient to change the state of the first fixed frame and the second fixed frame at the measured position, and facilitate all-round measurement of the required measurement position, thereby improving the accuracy of the measuring mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 A schematic diagram of the three-dimensional structure of the connecting plate and the second fixing frame of the present invention; Figure 3 Schematic diagram of the three-dimensional structure of the sliding frame and the first fixed block of the present invention; Figure 4 is a cross-sectional view of the first fixing frame and the second fixing frame of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the present invention after the shielding is stored; Figure 6 It is a schematic diagram of the three-dimensional structure of the rotating rod and the sliding rod of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the insertion rod and the limiting member of the present invention; Figure 8 is a cross-sectional view of the sliding rod and the L-shaped rod of the present invention; Figure 9 It is a cross-sectional view of the fixed shell and the sliding plate of the present invention.

[0017] The names and serial numbers of the parts in the figure are: 1. First fixed frame, 2. Display panel, 3. Connecting plate, 4. Second fixed frame, 5. Sliding block, 6. Telescopic push rod, 7. Elastic telescopic rod, 8. Sliding frame, 9. First fixed block, 10. Insert rod, 11. Blind hole, 12. Limiting piece, 13. Second fixed block, 14. Rotating rod, 15. Sliding rod, 16. Fixed rod, 17. Sliding sleeve, 18. Fixed sleeve, 19. L-shaped rod, 20. Fixed shell, 21. Sliding plate, 22. L-shaped plate. DETAILED DESCRIPTION

[0018] The preferred technical solutions of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] Example 1: A device for measuring the flatness of a building curtain wall, such as Figure 1-Figure 3 As shown, it includes a first fixed frame 1, a display panel 2 is installed on the first fixed frame 1, and the display panel 2 is used to display the length, angle and flatness deviation value, etc. The first fixed frame 1 is rotatably provided with a connecting plate 3, and the connecting plate 3 is slidably connected to the second fixed frame 4, and the second fixed frame 4 is provided with an L-shaped sliding groove, so that the first fixed frame 1 and the second fixed frame 4 are in a flattened state (as shown in the attached figure). Figure 1 ) or both are in folded storage state (such as attached Figure 5 ), the middle part of the first fixed frame 1 and the second fixed frame 4 are both provided with a chamber for reducing weight and improving the practicality of the device; sliding blocks 5 are slidably provided in the chambers of the first fixed frame 1 and the second fixed frame 4, and the sliding blocks 5 are used to measure the flatness of the curtain wall to be measured. The sliding blocks 5 are used to fit on the surface of the curtain wall to be measured to show the flatness of the curtain wall. In the initial state, the two sliding blocks 5 are respectively retracted into the first fixed frame 1 and the second fixed frame 4 to avoid damage to the two sliding blocks 5 by collision when not in use. The first fixed frame 1 and the second fixed frame 4 are jointly provided with a driving mechanism for controlling the synchronous movement of the two sliding blocks 5, and the first fixed frame 1 and the second fixed frame 4 are jointly provided with a limiting mechanism, which is used to keep the first fixed frame 1 and the second fixed frame 4 in an expanded state.

[0020] like Figure 1 and Figure 4 As shown, the driving mechanism includes four telescopic push rods 6, and the four telescopic push rods 6 are divided into two groups. The two groups of telescopic push rods 6 are respectively fixed in the cavity of the first fixed frame 1 and the cavity of the second fixed frame 4. The telescopic ends of the telescopic push rods 6 are fixed to the adjacent sliding blocks 5, and the two telescopic push rods 6 in the same group are respectively located at the two ends of the corresponding sliding blocks 5, ensuring that the sides of the two sliding blocks 5 remain parallel after extension. The side of the first fixed frame 1 and the side of the second fixed frame 4 are both fixed with elastic telescopic rods 7, and elastic parts are provided in the elastic telescopic rods 7. The telescopic ends of the two elastic telescopic rods 7 squeeze each other, and the chamber of the elastic telescopic rod 7 is connected to the chamber of the corresponding telescopic push rod 6 through a pipe, and the chamber of the telescopic push rod 6, the chamber of the elastic telescopic rod 7 and the pipe connecting the two are all filled with liquid medium.

[0021] like Figure 1 and Figure 3 As shown, the limiting mechanism includes a sliding frame 8, which is slidably arranged on the first fixed frame 1, a first spring is fixed between the sliding frame 8 and the first fixed frame 1, and a first fixed block 9 is fixed to the second fixed frame 4. The left side of the first fixed block 9 is provided with an inclined surface (with an attached Figure 3Taking the middle direction as an example), the inclined surface of the first fixed block 9 is used to squeeze the sliding frame 8. The first fixed block 9 is provided with a limiting groove. When the sliding frame 8 is located in the limiting groove of the first fixed block 9, the first fixed frame 1 and the second fixed frame 4 are in the same straight line, so that the first fixed frame 1 and the second fixed frame 4 are in an expanded state, which is convenient for subsequent use to measure the flatness of the curtain wall.

[0022] like Figure 4-Figure 7 As shown, the second fixed frame 4 is slidingly provided with an insertion rod 10, and the upper part of the insertion rod 10 extends out of the second fixed frame 4, which is convenient for the operator to control the movement of the insertion rod 10. A magnet is embedded in the insertion rod 10, and an iron sheet is provided in the second fixed frame 4. In the initial state, the insertion rod 10 is retracted into the second fixed frame 4. This structure is a conventional setting and is not shown in the figure. A notch is provided at the lower part of the insertion rod 10, and a slope is provided on the lower side of the insertion rod 10. The first fixed frame 1 is provided with a blind hole 11, and the blind hole 11 is used to limit the insertion rod 10. The first fixed frame 1 is slidingly provided with a limiting member 12, and a first tension spring is fixed between the limiting member 12 and the first fixed frame 1. The slope of the insertion rod 10 is used to squeeze the limiting member 12 to move, so that the insertion rod 10 can be quickly inserted into the blind hole 11.

[0023] Specific working principle: The operator first pulls the limiter 12 to pull the limiter 12 out of the notch of the plug rod 10, then moves the plug rod 10 to pull it out of the blind hole 11, then holds the first fixed frame 1 and the second fixed frame 4 with both hands and pulls them to slide the connecting plate 3 to the corner of the L-shaped slot on the second fixed frame 4, and then controls the first fixed frame 1 and the second fixed frame 4 to swing relative to each other so that the central axes of the two coincide in the horizontal direction (as shown in the attached figure). Figure 1 ), and then press the first fixed frame 1 and the second fixed frame 4 to bring them together, wherein the telescopic ends of the two elastic telescopic rods 7 first touch, and then the first fixed frame 1 and the second fixed frame 4 continue to move relative to each other, and the telescopic ends of the two elastic telescopic rods 7 are synchronously contracted under the limited extrusion, and the upper telescopic ends of the elastic telescopic rods 7 move to squeeze the elastic parts therein. The contraction of the upper telescopic ends of the elastic telescopic rods 7 squeezes the liquid in their chambers into the chambers of the corresponding telescopic push rods 6 through the adjacent pipes, so that the telescopic ends of the telescopic push rods 6 drive the adjacent sliding blocks 5 to move, controlling the two sliding blocks 5 to extend from the first fixed frame 1 and the second fixed frame 4 respectively.

[0024] As the first fixed frame 1 and the second fixed frame 4 continue to move relative to each other, when the sliding frame 8 contacts the inclined surface of the first fixed block 9, under the squeezing action of the upper inclined surface of the first fixed block 9, the sliding frame 8 moves to squeeze the adjacent first spring. When the sliding frame 8 is located at the upper limit groove of the first fixed block 9, under the elastic force of the first spring connected to the sliding frame 8, the sliding frame 8 moves into the limiting groove of the first fixed block 9, so that the first fixed frame 1 and the second fixed frame 4 remain in the unfolded state. Subsequently, the first fixed frame 1 and the second fixed frame 4 are held by hand to make the sliding block 5 fit the surface of the curtain wall to be measured for flatness measurement. After the measurement is completed, the operator pulls The sliding frame 8 disengages it from the upper limit groove of the first fixed block 9, and then controls the first fixed frame 1 and the second fixed frame 4 to bend and swing, and reinserts the insertion rod 10 into the blind hole 11, and the limiting member 12 is inserted into the notch of the insertion rod 10, so that the first fixed frame 1 and the second fixed frame 4 remain stationary in the bent state, that is, the first fixed frame 1 and the second fixed frame 4 are in a shielded and stored state. At the same time, under the elastic force of the elastic member on the elastic telescopic rod 7, the telescopic end of the elastic telescopic rod 7 moves in the opposite direction, and the two sliding blocks 5 are retracted into the first fixed frame 1 and the second fixed frame 4 to prevent the sliding blocks 5 from being bumped and bent, thereby ensuring the accuracy of subsequent measurement results.

[0025] Example 2: Based on Example 1, Figure 2 、 Figure 5 、 Figure 6 and Figure 8 As shown, it also includes two symmetrically distributed second fixing blocks 13, which are respectively fixed to the outer side of the first fixing frame 1 and the outer side of the second fixing frame 4. The second fixing blocks 13 are rotatably provided with a rotating rod 14, and the rotating rod 14 is limited and slidably provided with a sliding rod 15. A second spring is fixed between the sliding rod 15 and the adjacent rotating rod 14. The sliding rod 15 is fixedly connected to a fixing rod 16, and a grip is provided on the fixing rod 16; a sliding sleeve 17 (with an attached portion) is slidably provided on the fixing rod 16 at the rear side Figure 8 For example, a third spring is fixedly connected between the sliding sleeve 17 and the corresponding fixed rod 16, wherein the end of the front fixed rod 16 is hemispherical, and the sliding sleeve 17 is provided with an annular inclined surface to facilitate the insertion of the front fixed rod 16 into the sliding sleeve 17, and the sliding sleeve 17 is used to limit the two fixed rods 16; the sliding rod 15 is fixedly connected to a fixed sleeve 18, and the fixed sleeve 18 is located on the outside of the adjacent second spring. The fixed sleeve 18 is fixed to an L-shaped rod 19; both the fixed sleeve 18 and the L-shaped rod 19 are provided with balls. When the center lines of the two fixed rods 16 coincide, the outer edges of the four balls are located on the same horizontal plane.

[0026] like Figure 8 and Figure 9As shown, it also includes: two symmetrically distributed fixed shells 20, the two fixed shells 20 are respectively fixed to the upper side of the first fixed frame 1 and the upper side of the second fixed frame 4 (with attached Figure 8 The middle direction is taken as an example); two sliding plates 21, the sliding plates 21 are arc-shaped, and the two sliding plates 21 are respectively slidably arranged in adjacent fixed shells 20. The fixed shells 20 are slidably provided with limit columns, and a second tension spring is fixedly connected between the limit columns and the adjacent fixed shells 20. The sliding plate 21 is provided with two limit holes, and the limit columns are inserted into adjacent limit holes to limit the corresponding sliding plates 21; the first fixed frame 1 and the second fixed frame 4 are both fixed with L-shaped plates 22. In the initial state, the fixed shells 20 and the adjacent sliding plates 21 limit the adjacent fixed sleeves 18, and at this time the sliding plates 21 are in an extended state. When the sliding plates 21 are in the adjacent fixed shells 20 (as shown in the attached Figure 8 In the middle state, the fixed shell 20 and the sliding plate 21 do not affect the movement of the fixed sleeve 18 and the L-shaped rod 19.

[0027] Specific working principle: When measuring the flatness of the outer curtain wall of a high-rise building through a hanging basket, the above operation is repeated to adjust the first fixed frame 1 and the second fixed frame 4 to the expanded state. The operator first presses the sliding plate 21 to retract the sliding plate 21 into the adjacent fixed shell 20, wherein the upper limit column on the fixed shell 20 is limited by the corresponding limit hole on the adjacent sliding plate 21, so that the sliding plate 21 remains retracted into the adjacent fixed shell 20. At this time, the fixed shell 20 and the sliding plate 21 release the limit on the adjacent fixed sleeve 18, and subsequent operations The operator controls the two sliding rods 15 to move relative to each other so that the center lines of the two fixed rods 16 coincide with each other. At the same time, the operator moves the sliding sleeve 17 so that the sliding sleeve 17 is sleeved on the outside of the connection between the two fixed rods 16 to complete the connection between the two fixed rods 16. Subsequently, the operator holds the grip on the fixed rod 16 and fits the two sliding blocks 5 on the surface of the curtain wall to be measured for measurement. In this process, the embracing grip of the fixed rod 16 can reduce the risk of tool damage due to slipping or accidental falling, and further ensure the reliability of the measurement results.

[0028] After the sliding block 5 is in contact with the surface of the curtain wall to be measured, the operator presses the fixing rod 16 to make the sliding rod 15 drive the adjacent fixing sleeve 18 and the L-shaped rod 19 to move. Finally, the balls on the sliding rod 15 and the balls on the L-shaped rod 19 are in contact with the surface of the curtain wall to be measured. After measuring a data, the operator keeps pressing the fixing rod 16, hooks the L-shaped plate 22 with his fingers, and then pulls the L-shaped plate 22 to move the first fixing frame 1 and the second fixing frame 4 away from the curtain wall. At this time, the rotating rod 14 moves along the adjacent sliding rod 15 and compresses the adjacent second spring. Then the operator holds the two fixing rods 1 6. The angles of the first fixed frame 1 and the second fixed frame 4 are swung. Under the action of the ball, the measuring device quickly completes the state adjustment. Then, the L-shaped plate 22 is loosened. Under the action of the second spring force, the first fixed frame 1 and the second fixed frame 4 move in opposite directions until the two sliding blocks 5 are re-attached to the curtain wall, and the multi-angle measurement of the curtain wall is quickly completed. In this process, the states of the first fixed frame 1 and the second fixed frame 4 can be changed by controlling them to move a specified distance, thereby reducing the occurrence of collisions between the first fixed frame 1 and the second fixed frame 4 and the hanging basket during the measurement process, thereby reducing damage or falling off of the measuring device during the measurement process.

[0029] It should be noted that the above preferred embodiments are merely illustrative of the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit and essence of the present invention are intended to be encompassed within the scope of protection of the present invention.

Claims

1. A device for measuring the flatness of a building curtain wall, characterized in that: The invention comprises a first fixed frame (1), a display panel (2) is mounted on the first fixed frame (1), a connecting plate (3) is rotatably provided on the first fixed frame (1), the connecting plate (3) is slidably connected to a second fixed frame (4), and a cavity is provided in the middle of each of the first fixed frame (1) and the second fixed frame (4); Sliding blocks (5) are slidably arranged in the chambers of the first fixed frame (1) and the second fixed frame (4), and the sliding blocks (5) are used to measure the flatness of the curtain wall to be measured. The first fixed frame (1) and the second fixed frame (4) are jointly provided with a driving mechanism for controlling the synchronous movement of the two sliding blocks (5). The first fixed frame (1) and the second fixed frame (4) are jointly provided with a limiting mechanism, and the limiting mechanism is used for mutual limiting between the first fixed frame (1) and the second fixed frame (4).

2. A building curtain wall flatness measuring device according to claim 1, characterized in that: The driving mechanism includes a plurality of telescopic push rods (6), and the plurality of telescopic push rods (6) are divided into two groups. The two groups of telescopic push rods (6) are respectively fixed in the chamber of the first fixed frame (1) and the chamber of the second fixed frame (4). The telescopic ends of the telescopic push rods (6) are fixed to the adjacent sliding blocks (5). The first fixed frame (1) and the second fixed frame (4) are both fixed with elastic telescopic rods (7). The chambers of the elastic telescopic rods (7) are connected to the chambers of the corresponding telescopic push rods (6) through pipes, and the chambers of the telescopic push rods (6), the chambers of the elastic telescopic rods (7) and the pipes connecting the two are all filled with liquid medium.

3. The device for measuring the flatness of a building curtain wall according to claim 1, wherein: The limiting mechanism comprises a sliding frame (8), the sliding frame (8) is slidably arranged on the first fixed frame (1), a first spring is fixedly connected between the sliding frame (8) and the first fixed frame (1), the second fixed frame (4) is fixedly connected to a first fixed block (9), the first fixed block (9) is provided with a limiting groove, and when the sliding frame (8) is located in the limiting groove of the first fixed block (9), the first fixed frame (1) and the second fixed frame (4) are on the same straight line.

4. A building curtain wall flatness measuring device according to claim 3, characterized in that: The second fixed frame (4) is slidably provided with an insertion rod (10), and the insertion rod (10) is provided with a notch. The first fixed frame (1) is provided with a blind hole (11), and the blind hole (11) is used to limit the insertion rod (10). The first fixed frame (1) is slidably provided with a limiting member (12), and a first tension spring is fixedly connected between the limiting member (12) and the first fixed frame (1), and the limiting member (12) is used to limit the insertion rod (10).

5. The device for measuring the flatness of a building curtain wall according to claim 1, wherein: The invention also includes two second fixed blocks (13), the two second fixed blocks (13) are respectively fixed to the first fixed frame (1) and the second fixed frame (4), the second fixed block (13) is rotatably provided with a rotating rod (14), the rotating rod (14) is limitedly slidably provided with a sliding rod (15), a second spring is fixed between the sliding rod (15) and the adjacent rotating rod (14), and the sliding rod (15) is fixedly connected to a fixed rod (16).

6. The device for measuring the flatness of a building curtain wall according to claim 5, characterized in that: One of the fixed rods (16) is slidably provided with a sliding sleeve (17), a third spring is fixedly connected between the sliding sleeve (17) and the corresponding fixed rod (16), and the sliding sleeve (17) is used to limit the two fixed rods (16).

7. The device for measuring the flatness of a building curtain wall according to claim 6, characterized in that: The sliding rod (15) is fixedly connected to a fixing sleeve (18), and the fixing sleeve (18) is fixedly connected to an L-shaped rod (19).

8. The device for measuring the flatness of a building curtain wall according to claim 7, wherein: The fixing sleeve (18) and the L-shaped rod (19) are both provided with balls.

9. The device for measuring the flatness of a building curtain wall according to claim 5, wherein: Also included are: Two fixed shells (20) are respectively fixed to the side surface of the first fixed frame (1) and the side surface of the second fixed frame (4); Two sliding plates (21) are respectively slidably arranged in adjacent fixed shells (20); the fixed shells (20) are slidably provided with limiting columns; a second tension spring is fixedly connected between the limiting columns and the adjacent fixed shells (20); the sliding plates (21) are provided with a plurality of limiting holes; the limiting columns are inserted into adjacent limiting holes for limiting the corresponding sliding plates (21).

10. The device for measuring the flatness of a building curtain wall according to claim 9, characterized in that: The first fixing frame (1) and the second fixing frame (4) are both fixedly connected with an L-shaped plate (22).

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