阅读说明：本技术 一种检测灵敏度高的建筑工程垂直度检测装置 (Building engineering straightness detection device that hangs down that detectivity is high ) 是由 杨新新 夏红艳 王金城 于 2021-08-30 设计创作，主要内容包括：本发明公开了一种检测灵敏度高的建筑工程垂直度检测装置,包括支架,所述支架一侧外表面设有水平仪与控制开关,所述支架内底部设有若干组调节机构,所述支架内部一侧从上之下依次设置有蓄电池一、控制器以及无线信号收发装置,所述支架顶部一侧设有伺服电机,所述伺服电机的底部输出端设有丝杆,所述支架远离所述水平仪一侧外表面设有T形槽,所述丝杆贯穿至所述T形槽内底部,所述丝杆上套设有T形块,所述T形块上开设有螺纹孔,所述T形块的一端贯穿至所述支架外侧与底座连接。有益效果：通过水平仪与调节机构的设计,可以使得支架在地面崎岖不平或者有角度倾斜的状态下使支架处于水平状态,从而提高了数据的精准性。(The invention discloses a construction engineering verticality detection device with high detection sensitivity, which comprises a support, wherein a level and a control switch are arranged on the outer surface of one side of the support, a plurality of groups of adjusting mechanisms are arranged at the bottom in the support, a first storage battery, a controller and a wireless signal receiving and transmitting device are sequentially arranged on one side in the support from top to bottom, a servo motor is arranged on one side of the top of the support, a lead screw is arranged at the output end of the bottom of the servo motor, a T-shaped groove is arranged on the outer surface of one side of the support, away from the level, penetrating through the lead screw to the bottom in the T-shaped groove, a T-shaped block is sleeved on the lead screw, a threaded hole is formed in the T-shaped block, and one end of the T-shaped block penetrates through the outer side of the support to be connected with a base. Has the advantages that: through the design of the level gauge and the adjusting mechanism, the support can be in a horizontal state under the condition that the ground is rugged and uneven or inclined at an angle, so that the accuracy of data is improved.)

1. The building engineering verticality detection device with high detection sensitivity is characterized by comprising a support (1), wherein a level (2) and a control switch (3) are arranged on the outer surface of one side of the support (1), a plurality of groups of adjusting mechanisms are arranged at the bottom in the support (1), a first storage battery (4), a controller (5) and a wireless signal transceiving device (6) are sequentially arranged on one side of the inside of the support (1) from top to bottom, a servo motor (16) is arranged on one side of the top of the support (1), a lead screw (18) is arranged at the output end of the bottom of the servo motor (16), a T-shaped groove (17) is arranged on the outer surface of one side of the support (1) away from the level (2), the lead screw (18) penetrates through the bottom in the T-shaped groove (17), a T-shaped block (19) is sleeved on the lead screw (18), and a threaded hole is formed in the T-shaped block (19), one end of the T-shaped block (19) penetrates through the outer side of the support (1) and is connected with a base (20), a shell (21) is arranged at the center of the top of the base (20), an accommodating groove (22) is formed in the shell (21), a state lamp (24) and a slot (28) are arranged at the top of the base (20) and located on one side of the shell (21), the state lamp (24) is located on the outer side of the slot (28), a photoelectric switch (29) is arranged in the slot (28), an inserting block (39) is inserted in the slot (28), the top end of the inserting block (39) is connected with a fan-shaped plate (25), the fan-shaped plate (25) is matched with the shell (21), an angle line is arranged on the outer surface of the fan-shaped plate (25), two fixing plates (31) are arranged on the top of the base (20) and located between the two fan-shaped plates (25), two the bottom of the relative one side of fixed plate (31) is equipped with the locking mechanism, two the cover is equipped with movable rod (32) between the middle part of fixed plate (31), be equipped with movable plate (26) on movable rod (32), movable plate (26) bottom surface is equipped with a plurality of interlock tooth (33), evenly be provided with a plurality of draw-in groove (34) on interlock tooth (33).

2. The building engineering verticality detection device with high detection sensitivity according to claim 1, wherein the adjusting mechanism comprises an inner cavity (7), the inner cavity (7) is located at the bottom inside the support (1), a limiting groove (8) is formed in the inner wall of the side edge of the inner cavity (7), two symmetrically arranged threaded holes (13) are formed in the bottom inside the inner cavity (7), two driving motors (9) are symmetrically arranged inside the inner cavity (7), the two driving motors (9) are fixedly connected through a connecting plate (10), a limiting plate (11) is arranged outside the driving motors (9), the limiting plate (11) penetrates into the limiting groove (8), a threaded rod (12) is arranged at the bottom output end of the driving motors (9), the bottom end of the threaded rod (12) penetrates below the support (1) through the threaded hole (13) and is connected with a support plate (14), the bottom of the supporting plate (14) is provided with a plurality of groups of universal wheels (15).

3. The building engineering verticality detection device with high detection sensitivity according to claim 2, wherein the locking mechanism comprises a fixing rod (35), the fixing rod (35) is fixedly connected with the bottoms of the side edges of the two fixing plates (31), a plurality of connecting rods (37) with sequentially increasing lengths are sleeved on the fixing rod (35), the connecting rods (37) are movably connected with the fixing rod (35) through rotating blocks (36), a clamping block (38) is arranged at the other end of each connecting rod (37), and the clamping blocks (38) are matched with the clamping grooves (34).

4. The construction engineering verticality detection device with high detection sensitivity according to claim 3, wherein the fixture block (38) and the engaging tooth (33) are both made of a magnet and a ferrous metal material respectively.

5. The building engineering verticality detection device with high detection sensitivity according to claim 4, wherein a rotation angle sensor (27) is arranged inside the moving plate (26), a second storage battery (30) is arranged inside the base (20), and a shaft rod connecting piece matched with the threaded rod (12) is arranged at the top of the supporting plate (14).

6. The building engineering verticality detection device with high detection sensitivity according to claim 5, wherein a solar panel (23) is disposed on the outer surface of the support (1) and the top of the base (20), and the two solar panels (23) are electrically connected to the first storage battery (4) and the second storage battery (30), respectively.

7. The building engineering verticality detection device with high detection sensitivity according to claim 6, wherein the control switch (3), the first storage battery (4), the wireless signal transceiver (6), the driving motor (9), the servo motor (16), the rotation angle sensor (27), and the photoelectric switch (29) are electrically connected to the controller (5).

Technical Field

The invention relates to the technical field of buildings, in particular to a building engineering verticality detection device with high detection sensitivity.

Background

For buildings, the control measurement of the verticality of the building is an important measurement point in main construction. The verticality of each floor is observed, and control data is provided for professional quality inspection personnel, so that the verticality of the building can be adjusted and inspected in time. But also to provide detailed vertical control lines to the constructor. In the construction of building engineering, particularly in the construction of middle and high-rise buildings, the control of the verticality of the building is an important influence factor of the construction quality. Once the verticality has overlarge deviation, the verticality must be compensated by measures such as plastering and the like, so that the construction period is delayed.

The existing verticality detection equipment is simple, generally, a right-angled ruler is utilized to detect the position close to a wall corner, then the vertical degree of a wall body is judged, so that the verticality can be detected, when the angle between the wall bodies is more than ninety degrees, the specific angle of the wall body cannot be measured in such a mode, unnecessary troubles are caused, in addition, the detection equipment is generally a surface for the building engineering, and the verticality of a plurality of positions of the building engineering cannot be effectively detected for the detection of the surface.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

Aiming at the problems in the related art, the invention provides a building engineering verticality detection device with high detection sensitivity, so as to overcome the technical problems in the prior related art.

Therefore, the invention adopts the following specific technical scheme:

a construction engineering verticality detection device with high detection sensitivity comprises a support, wherein a level gauge and a control switch are arranged on the outer surface of one side of the support, a plurality of groups of adjusting mechanisms are arranged at the bottom in the support, a first storage battery, a controller and a wireless signal transceiver are sequentially arranged on one side of the interior of the support from top to bottom, a servo motor is arranged on one side of the top of the support, a lead screw is arranged at the output end of the bottom of the servo motor, a T-shaped groove is formed in the outer surface of one side of the support, away from the level gauge, and penetrates through the inner bottom of the T-shaped groove, a T-shaped block is sleeved on the lead screw and provided with a threaded hole, one end of the T-shaped block penetrates through the outer side of the support to be connected with a base, a shell is arranged at the center of the top of the base, a containing groove is formed in the shell, a state lamp and a slot are formed in the top of the base and positioned on one side of the shell, the state lamp is located the outside of slot, the inside photoelectric switch that is equipped with of slot, the inside inserted block that has pegged graft of slot, the top and the sector plate of inserted block are connected, the sector plate with the casing agrees with mutually, the surface of sector plate is equipped with the angle line, it just is located two at the base top be equipped with two fixed plates, two the bottom of the relative one side of fixed plate is equipped with locking mechanism, two the cover is equipped with the movable rod between the middle part of fixed plate, be equipped with the movable plate on the movable rod, movable plate bottom surface is equipped with a plurality of interlock tooth, evenly be provided with a plurality of draw-in groove on the interlock tooth.

As preferred, adjustment mechanism includes the inner chamber, the inner chamber is located bottom in the support, be equipped with the spacing groove on the inner chamber side inner wall, the bottom is equipped with the screw hole that two symmetries set up in the inner chamber, the inside symmetry of inner chamber is provided with two driving motor, two driving motor passes through the connecting plate and connects fixedly, driving motor's the outside is equipped with the limiting plate, the limiting plate runs through extremely the spacing inslot, driving motor's bottom output is equipped with the threaded rod, the bottom of threaded rod is passed through the screw hole run through extremely the below and the backup pad of support are connected, the backup pad bottom is equipped with a plurality of universal wheels of group.

Preferably, the locking mechanism comprises a fixed rod, the fixed rod is connected and fixed with the bottom of the side edge of the fixed plate, a plurality of connecting rods with sequentially increased lengths are sleeved on the fixed rod, the connecting rods are movably connected with the fixed rod through rotating blocks, a clamping block is arranged at the other end of each connecting rod, and the clamping blocks are matched with the clamping grooves.

Preferably, both the latch and the engaging tooth are made of a magnet and an iron metal material, respectively.

Preferably, a rotation angle sensor is arranged inside the moving plate, a second storage battery is arranged inside the base, and a shaft rod connecting piece matched with the threaded rod is arranged at the top of the supporting plate.

Preferably, the outer surface of the support and the top of the base are both provided with solar panels, and the solar panels are respectively electrically connected with the first storage battery and the second storage battery.

Preferably, the control switch, the first storage battery, the wireless signal transceiver, the driving motor, the servo motor, the rotation angle sensor and the photoelectric switch are all electrically connected with the controller.

The invention has the beneficial effects that: through the design of the level gauge and the adjusting mechanism, the support can be in a horizontal state under the condition that the ground is rugged or inclined at an angle, so that the data accuracy is improved; through the design of the servo motor, the T-shaped groove, the lead screw and the T-shaped block, the base is driven to move vertically, so that data of multiple points can be collected, and the accuracy of the data is improved; through the design of the photoelectric switch and the status light, a worker can know whether the insertion block is completely inserted into the insertion slot or not, so that the stability of the sector plate is improved; through the design of locking the mechanism, can all lock through the connecting rod of different length when the movable plate is in arbitrary angle and die to the fixture block passes through the magnetite effect with the draw-in groove and can adsorb together, avoids breaking away from in the fixture block follow draw-in groove.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a detection mechanism of a high-sensitivity building engineering verticality detection device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a base structure of a high-sensitivity building construction verticality detection apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a partial internal structure of a base of the device for detecting perpendicularity in construction engineering with high detection sensitivity according to an embodiment of the invention;

FIG. 4 is a structural diagram of a sector plate of the building engineering verticality detection device with high detection sensitivity according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a connection structure of a fixed plate and a movable plate of the device for detecting perpendicularity in construction engineering with high detection sensitivity according to an embodiment of the invention;

FIG. 6 is a schematic diagram of a partial structure of a movable plate of the device for detecting perpendicularity in construction engineering with high detection sensitivity according to an embodiment of the invention;

fig. 7 is a schematic view of the internal structure of the support of the device for detecting perpendicularity in construction engineering with high detection sensitivity according to the embodiment of the invention.

In the figure:

1. a support; 2. a level gauge; 3. a control switch; 4. a first storage battery; 5. a controller; 6. a wireless signal transceiver; 7. an inner cavity; 8. a limiting groove; 9. a drive motor; 10. a connecting plate; 11. a limiting plate; 12. a threaded rod; 13. a threaded hole; 14. a support plate; 15. a universal wheel; 16. a servo motor; 17. a T-shaped slot; 18. a screw rod; 19. a T-shaped block; 20. a base; 21. a housing; 22. accommodating grooves; 23. a solar panel; 24. a status light; 25. a sector plate; 26. moving the plate; 27. a rotation angle sensor; 28. a slot; 29. a photoelectric switch; 30. a second storage battery; 31. a fixing plate; 32. a movable rod; 33. engaging teeth; 34. a card slot; 35. fixing the rod; 36. rotating the block; 37. a connecting rod; 38. a clamping block; 39. and (5) inserting the blocks.

Detailed Description

For further explanation of the various embodiments, the drawings which form a part of the disclosure and which are incorporated in and constitute a part of this specification, illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and to enable others of ordinary skill in the art to understand the various embodiments and advantages of the invention, and, by reference to these figures, reference is made to the accompanying drawings, which are not to scale and wherein like reference numerals generally refer to like elements.

According to the embodiment of the invention, the building engineering verticality detection device with high detection sensitivity is provided.

In the first embodiment, as shown in fig. 1 to 7, the device for detecting the perpendicularity of the building engineering with high detection sensitivity according to the embodiment of the invention comprises a bracket 1, a level gauge 2 and a control switch 3 are arranged on the outer surface of one side of the bracket 1, a plurality of groups of adjusting mechanisms are arranged at the bottom in the bracket 1, a first storage battery 4, a controller 5 and a wireless signal transceiver 6 are sequentially arranged on one side of the inside of the bracket 1 from top to bottom, a servo motor 16 is arranged on one side of the top of the bracket 1, a screw rod 18 is arranged at the output end of the bottom of the servo motor 16, a T-shaped groove 17 is arranged on the outer surface of one side of the bracket 1 away from the level gauge 2, the screw rod 18 penetrates to the bottom in the T-shaped groove 17, a T-shaped block 19 is sleeved on the screw rod 18, a threaded hole is formed in the T-shaped block 19, one end of the T-shaped block 19 penetrates to the outside of the bracket 1 to be connected with a base 20, the lamp holder is characterized in that a shell 21 is arranged at the center of the top of the base 20, an accommodating groove 22 is formed in the shell 21, a status light 24 and a slot 28 are arranged at the top of the base 20 and located on one side of the shell 21, the status light 24 is located on the outer side of the slot 28, a photoelectric switch 29 is arranged in the slot 28, an insertion block 39 is inserted in the slot 28, the top end of the insertion block 39 is connected with a sector plate 25, the sector plate 25 is matched with the shell 21, an angle line is arranged on the outer surface of the sector plate 25, two fixing plates 31 are arranged at the top of the base 20 and located between the two sector plates 25, a locking mechanism is arranged at the bottom of the opposite side of the two fixing plates 31, a movable rod 32 is sleeved between the middle parts of the two fixing plates 31, a movable plate 26 is arranged on the movable rod 32, and a plurality of engaging teeth 33 are arranged on the outer surface of the bottom of the movable plate 26, a plurality of clamping grooves 34 are uniformly arranged on the meshing teeth 33.

The second embodiment comprises a bracket 1, a level 2 and a control switch 3 are arranged on the outer surface of one side of the bracket 1, a plurality of groups of adjusting mechanisms are arranged at the bottom in the bracket 1, a first storage battery 4, a controller 5 and a wireless signal transceiver 6 are sequentially arranged on one side in the bracket 1 from top to bottom, a servo motor 16 is arranged on one side of the top of the bracket 1, a lead screw 18 is arranged at the output end of the bottom of the servo motor 16, a T-shaped groove 17 is arranged on the outer surface of one side of the bracket 1 away from the level 2, the lead screw 18 penetrates through the bottom in the T-shaped groove 17, a T-shaped block 19 is sleeved on the lead screw 18, a threaded hole is formed in the T-shaped block 19, one end of the T-shaped block 19 penetrates through the outer side of the bracket 1 to be connected with a base 20, a shell 21 is arranged at the center of the top of the base 20, an accommodating groove 22 is arranged in the shell 21, a status light 24 and an inserting groove 28 are arranged at the top of the base 20 and positioned on one side of the shell 21, the status light 24 is located at the outer side of the slot 28, the slot 28 is internally provided with a photoelectric switch 29, the slot 28 is internally inserted with an insert block 39, the top end of the insert block 39 is connected with the sector plates 25, the sector plates 25 are matched with the shell 21, the outer surface of the sector plate 25 is provided with an angle line, two fixing plates 31 are arranged at the top of the base 20 and between the two sector plates 25, the bottom of one side of the two fixing plates 31 opposite to each other is provided with a locking mechanism, a movable rod 32 is sleeved between the middle parts of the two fixing plates 31, the movable rod 32 is provided with a movable plate 26, the outer surface of the bottom of the movable plate 26 is provided with a plurality of occlusion teeth 33, the occlusion teeth 33 are uniformly provided with a plurality of clamping grooves 34, the adjusting mechanism comprises an inner cavity 7, the inner cavity 7 is located at the bottom in the bracket 1, and the inner wall of the side edge of the inner cavity 7 is provided with a limiting groove 8, the bottom is equipped with the screw hole 13 that two symmetries set up in inner chamber 7, the inside symmetry of inner chamber 7 is provided with two driving motor 9, two driving motor 9 passes through connecting plate 10 to be connected fixedly, driving motor 9's the outside is equipped with limiting plate 11, limiting plate 11 run through extremely in the spacing groove 8, driving motor 9's bottom output is equipped with threaded rod 12, threaded rod 12's bottom is passed through screw hole 13 run through extremely support 1's below is connected with backup pad 14, backup pad 14 bottom is equipped with a plurality of universal wheels 15 of group. It can be seen from the above design that the design of the level 2 and the adjusting mechanism can make the support 1 in a horizontal state when the ground is bumpy or inclined at an angle, thereby improving the accuracy of data.

The third embodiment comprises a bracket 1, a level 2 and a control switch 3 are arranged on the outer surface of one side of the bracket 1, a plurality of groups of adjusting mechanisms are arranged at the bottom in the bracket 1, a first storage battery 4, a controller 5 and a wireless signal transceiver 6 are sequentially arranged on one side in the bracket 1 from top to bottom, a servo motor 16 is arranged on one side of the top of the bracket 1, a lead screw 18 is arranged at the output end of the bottom of the servo motor 16, a T-shaped groove 17 is arranged on the outer surface of one side of the bracket 1 away from the level 2, the lead screw 18 penetrates through the bottom in the T-shaped groove 17, a T-shaped block 19 is sleeved on the lead screw 18, a threaded hole is formed in the T-shaped block 19, one end of the T-shaped block 19 penetrates through the outer side of the bracket 1 and is connected with a base 20, a shell 21 is arranged at the center of the top of the base 20, an accommodating groove 22 is arranged in the shell 21, a status light 24 and an inserting groove 28 are arranged at the top of the base 20 and positioned on one side of the shell 21, the status light 24 is located outside the slot 28, the slot 28 is internally provided with a photoelectric switch 29, the slot 28 is internally inserted with an insert block 39, the top end of the insert block 39 is connected with the sector plates 25, the sector plates 25 are matched with the shell 21, the outer surfaces of the sector plates 25 are provided with angle lines, two fixed plates 31 are arranged on the top of the base 20 and between the two sector plates 25, the bottom of one side of each of the two fixed plates 31 is provided with a locking mechanism, a movable rod 32 is sleeved between the middle parts of the two fixed plates 31, the movable rod 32 is provided with a movable plate 26, the outer surface of the bottom of the movable plate 26 is provided with a plurality of occlusion teeth 33, the occlusion teeth 33 are uniformly provided with a plurality of clamping grooves 34, the locking mechanism comprises a fixed rod 35, and the fixed rod 35 is fixedly connected with the bottoms of the side edges of the two fixed plates 31, the fixing rod 35 is sleeved with a plurality of connecting rods 37 with sequentially increased lengths, the connecting rods 37 are movably connected with the fixing rod 35 through rotating blocks 36, clamping blocks 38 are arranged at the other ends of the connecting rods 37, and the clamping blocks 38 are matched with the clamping grooves 34. It can be seen from the above design that, by the design of the locking mechanism, the locking can be performed by the connecting rods 37 of different lengths when the moving plate 26 is at any angle.

The fourth embodiment comprises a bracket 1, a level 2 and a control switch 3 are arranged on the outer surface of one side of the bracket 1, a plurality of groups of adjusting mechanisms are arranged at the bottom in the bracket 1, a first storage battery 4, a controller 5 and a wireless signal transceiver 6 are sequentially arranged on one side in the bracket 1 from top to bottom, a servo motor 16 is arranged on one side of the top of the bracket 1, a lead screw 18 is arranged at the output end of the bottom of the servo motor 16, a T-shaped groove 17 is arranged on the outer surface of one side of the bracket 1 away from the level 2, the lead screw 18 penetrates through the bottom in the T-shaped groove 17, a T-shaped block 19 is sleeved on the lead screw 18, a threaded hole is formed in the T-shaped block 19, one end of the T-shaped block 19 penetrates through the outer side of the bracket 1 and is connected with a base 20, a shell 21 is arranged at the center of the top of the base 20, an accommodating groove 22 is arranged in the shell 21, a status light 24 and an inserting groove 28 are arranged at the top of the base 20 and positioned on one side of the shell 21, the status light 24 is located outside the slot 28, the slot 28 is internally provided with a photoelectric switch 29, the slot 28 is internally inserted with an insert block 39, the top end of the insert block 39 is connected with the sector plates 25, the sector plates 25 are fitted with the shell 21, the outer surfaces of the sector plates 25 are provided with angle lines, two fixing plates 31 are arranged on the top of the base 20 and between the two sector plates 25, the bottom of one side of each of the two fixing plates 31 is provided with a locking mechanism, a movable rod 32 is sleeved between the middle parts of the two fixing plates 31, the movable rod 32 is provided with a movable plate 26, the outer surface of the bottom of the movable plate 26 is provided with a plurality of engaging teeth 33, the engaging teeth 33 are uniformly provided with a plurality of clamping grooves 34, the clamping blocks 38 and the engaging teeth 33 are respectively made of magnets and iron metal materials, and the movable plate 26 is internally provided with a corner sensor 27, the inside battery two 30 that is equipped with of base 20, the top of backup pad 14 be equipped with threaded rod 12 matched with axostylus axostyle connecting piece, the surface of support 1 and the top of base 20 all is equipped with solar panel 23, two solar panel 23 respectively with battery one 4 and battery two 30 electric connection, control switch 3, battery one 4, wireless signal transceiver 6, driving motor 9, servo motor 16, angle of rotation sensor 27, photoelectric switch 29 all with controller 5 electric connection. As can be seen from the above design, the latch 38 and the latch groove 34 can be attracted together by a magnet effect, so as to prevent the latch 38 from being disengaged from the latch groove 34.

For the convenience of understanding the technical solutions of the present invention, the following detailed description will be made on the working principle or the operation mode of the present invention in the practical process.

In summary, according to the above technical solution of the present invention, firstly, the bracket 1 is pushed to the detection wall surface, then a plurality of sets of adjusting mechanisms are controlled according to the level 2 and the control switch 3, the driving motor 9 in the adjusting mechanisms drives the threaded rod 12 to rotate, the threaded rod 12 and the threaded hole 13 are in threaded action while being limited by the limiting plate 11 and the limiting groove 8, so that the threaded rod 12 rotates and descends, the bottom end of the threaded rod 12 pushes the supporting plate 14 and the universal wheel 15 to move, the bracket 1 is adjusted to be in a horizontal state by the lifting of the plurality of sets of universal wheels 15, then the moving plate 26 is manually dragged, the moving plate 26 contacts with the wall surface (when the moving plate 26 moves, the rotation angle sensor 27 synchronously releases a signal to the controller 5 to transmit angle information), the sector angle can be determined by the scale line on the outer surface of the sector plate 25, when the angle is greater than 90 degrees, the locking mechanism is started, firstly, a connecting rod 37 with a proper length is selected, then the connecting rod 37 is rotated, a clamping block 38 at the end part of the connecting rod 37 is clamped into a corresponding clamping groove 34, at the moment, the clamping block 38 and the clamping groove 34 are adsorbed together due to the magnet effect, so that the moving plate 26 is locked, then the sector plate 25 is taken out, rotated by 180 degrees and then inserted into the slot 28, and at the moment, the number of degrees which are increased is read out through the scale marks on the sector plate 25.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.