Civil engineering steel bar spacing detection device

Abstract

The present invention relates to a device for detecting the spacing of steel bars in civil engineering, and belongs to the technical field of engineering supervision auxiliary tools. The device comprises a measuring rod and clamping assemblies respectively arranged at both ends of the measuring rod, the measuring rod comprises a cylinder and measuring mechanisms respectively arranged at both ends of the cylinder, buttons are respectively arranged on both sides of the cylinder, and the button is located on one side of the cylinder and is fixedly connected to a mounting rod, the measuring mechanism comprises a telescopic rod slidably connected to the cylinder along the length direction of the cylinder, a first rotating shaft rotatably connected to the mounting rod, a first pointer fixedly connected to the top of the first rotating shaft, a first gear fixedly connected to the first rotating shaft, a first sleeve fixedly connected to one end of the telescopic rod, a first plug-in rod slidably plugged into the first sleeve, the first plug-in rod fixedly connected to a first rack transmission-connected to the first gear, and a first transparent dial is arranged on the cylinder. The present invention solves the problem of low efficiency of steel bar spacing detection in the prior art.

Description

Technical Field

[0001] The invention relates to a civil engineering steel bar spacing detection device, belonging to the technical field of engineering supervision auxiliary tools. Background Art

[0002] In civil engineering construction, steel bar spacing detection is an effective means to ensure the bearing capacity and seismic performance of concrete structures. Reasonable steel bar spacing can balance the load distribution, improve the compressive strength of concrete, and effectively improve the stability and safety of the structure in the event of natural disasters such as earthquakes. Therefore, steel bar spacing detection tests are crucial to the stability and safety of building structures.

[0003] The main methods for checking the spacing between steel bars include the following: ruler measurement method, using a ruler or measuring tool to measure the distance between two adjacent steel bars. This method is suitable for simple and straight-line steel bars; tooth ruler measurement method, using a tooth ruler or the tooth ruler part of a measuring tool, placing the tooth ruler between two adjacent steel bars, reading the spacing scale on the tooth ruler for measurement, this method is suitable for narrow or difficult-to-reach areas; laser distance measurement method, using a laser distance measuring instrument for measurement, placing the instrument and emitting a laser beam, and measuring the distance between the two steel bars through which the laser beam passes. This method is suitable for reinforced concrete with large areas and complex structures; image measurement method, using an image measuring instrument or software, taking an image on the surface of the steel bar, and measuring the steel bar spacing in the image by analyzing it.

[0004] After searching, a Chinese patent with announcement number CN210346563U discloses a steel bar spacing detection device for highway bridge construction supervision, and its technical highlights are: it includes a ruler body, a vernier scale slot and a telescopic rod slot are opened inside the ruler body, a first fixed ruler is fixedly connected to one side of the ruler body, a first telescopic rod is fixedly installed at the bottom of the first fixed ruler and the ruler body, a second fixed ruler is fixedly connected to one end of the first telescopic rod away from the first fixed ruler and the ruler body, a handle is fixedly connected to one side of the ruler body, and a vernier scale mounting block is movably connected inside the vernier scale slot.

[0005] In the above scheme, two vernier scales and two fixed scales are set in parallel to improve the inspection quality and efficiency of the inspectors. However, in engineering construction, a large number of steel bars need to be inspected, and multi-point inspections are required between each adjacent steel bars, which is inefficient.

[0006] Therefore, a new solution needs to be proposed to solve this problem. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a device for detecting the spacing between steel bars in civil engineering, which solves the problem of low efficiency in detecting the spacing between steel bars in the prior art.

[0008] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0009] A civil engineering steel bar spacing detection device comprises a measuring rod and clamping assemblies respectively arranged at both ends of the measuring rod, the measuring rod comprises a cylinder and measuring mechanisms respectively arranged at both ends of the cylinder, two groups of the clamping assemblies are respectively arranged on the two groups of the measuring mechanisms, buttons are respectively arranged on both sides of the cylinder, the buttons are slidably inserted in the side walls of the cylinder, one side of the button located in the cylinder is fixedly connected to a mounting rod, a reset spring is arranged between the mounting rod and the inner wall of the cylinder, one group of the measuring mechanisms comprises a telescopic rod slidably connected to the cylinder along the length direction of the cylinder, a first rotating shaft rotatably connected to the mounting rod, and a first pointer fixedly connected to the top end of the first rotating shaft, a reset torsion spring is arranged between the first rotating shaft and the mounting rod, and a fixed connection is arranged on the first rotating shaft. A first gear is connected, one end of the telescopic rod located in the cylinder is fixedly connected to the first sleeve, a first plug rod is slidably inserted in the first sleeve, the first plug rod is fixedly connected to a first rack that is transmission-connected to the first gear, the open end of the first sleeve is fixedly connected to a first limiting ring, one end of the first plug rod located in the first sleeve is fixedly connected to a second limiting ring, a support spring is provided between the end of the first plug rod and the bottom of the first sleeve, one group of support springs in the measuring mechanism is in a contracted state, a check mechanism is provided between the mounting rod and the first rack, a damping member is provided between the first rotating shaft and the inner wall of the cylinder, a first transparent dial corresponding to the first pointer is provided on the cylinder, and scales are provided around the circumference of the first transparent dial.

[0010] The present invention is further configured as follows: the non-return mechanism includes a spring sheet fixedly connected to the mounting rod, a friction block fixedly connected to the end of the spring sheet and abutting against the first rack, wherein the spring sheet in a group of the measuring mechanisms is inclinedly arranged at one end away from the mounting rod toward the inside of the cylinder.

[0011] The present invention is further configured as follows: a speed changing mechanism is provided between the first rack and the first gear, and the speed changing mechanism includes a second rotating shaft rotatably connected to the cylinder, a first transmission pinion fixedly connected to the second rotating shaft and meshing with the first rack, and a second transmission gearwheel fixedly connected to the second rotating shaft and meshing with the first gear.

[0012] The present invention is further configured as follows: the measuring mechanism also includes a third rotating shaft rotatably connected to the mounting rod, a ratchet fixedly connected to the third rotating shaft, an elastic ratchet piece fixedly connected to the side wall of the first sleeve and cooperating with the ratchet, and a second pointer fixedly connected to the top end of the third rotating shaft, a reset torsion spring is provided between the third rotating shaft and the mounting rod, the elastic ratchet piece in one group of the measuring mechanisms is inclined in a direction away from the telescopic rod, a damping member is provided between the third rotating shaft and the inner wall of the cylinder, a second transparent dial corresponding to the second pointer is provided on the cylinder, and a scale is provided around the circumference of the second transparent dial.

[0013] The present invention is further configured as follows: the damping member includes a pair of fixed blocks fixedly connected to the inner wall of the cylinder and arranged at intervals, the opposite side walls of the fixed blocks are fixedly connected with rubber blocks, the rubber blocks gradually narrow in a trapezoidal structure in the direction away from the fixed blocks, and the first rotating shaft or the third rotating shaft is slidably inserted between the rubber blocks on both sides along the sliding direction of the button.

[0014] The present invention is further configured as follows: the support springs in another group of the measuring mechanisms are in an extended state, and one end of the spring sheet away from the mounting rod is inclined toward the outside of the cylinder, and the elastic ratchet sheet is inclined toward a direction close to the telescopic rod.

[0015] The present invention is further configured as follows: the measuring mechanism also includes a second rack fixedly connected to one end of the telescopic rod located inside the cylinder, a fourth rotating shaft rotatably connected to the middle position inside the cylinder, a second gear coaxially fixedly connected to the fourth rotating shaft, the second racks in the two groups of the measuring mechanisms are meshed with the second gear, the top end of the fourth rotating shaft passes through the cylinder and is provided with a third pointer, and a dial is provided on the portion of the outer wall of the cylinder corresponding to the third pointer.

[0016] The present invention is further configured as follows: the clamping assembly includes a support plate fixedly connected to the end of the telescopic rod, a locking bolt passing through the support plate, a locking nut threadedly connected to the locking bolt, a first clamping rod and a second clamping rod hinged to the locking bolt in the middle, and four sets of clamping wheels rotatably connected to the two ends of the first clamping rod and the two ends of the second clamping rod, respectively, and a V-shaped ring groove is provided in the middle of the clamping wheel.

[0017] The present invention is further configured as follows: a plurality of groups of balls are provided on the peripheral wall of the clamping wheel, the plurality of groups of balls are arranged axially along the clamping wheel, each group of balls are evenly distributed around the circumference of the clamping wheel, and a plurality of groups of balls are staggeredly arranged in the circumference of the clamping wheel, a ball groove is opened on the peripheral wall of the clamping wheel corresponding to the balls, and the balls are rollingly connected in the ball groove.

[0018] The present invention is further configured as follows: the clamping wheel includes a plurality of ring bodies corresponding one to one to each group of balls, the first clamping rod end and the second clamping rod end are both rotatably connected to a rotating shaft, the plurality of ring bodies are sleeved on the rotating shaft, and the rotating shaft is provided with limit bolts on both sides of the clamping wheel.

[0019] The beneficial effects of the present invention are:

[0020] 1. When measuring the spacing between steel bars, first adjust the telescopic rods on both sides to the calibrated distance, and after clamping the steel bars through the clamping assembly, move along the length direction of the two steel bars, so that when the telescopic rods on both sides are at positions where the spacing between the steel bars is different, the telescopic rods move in the cylinder, and under the cooperation of the first sleeve, the first plug-in rod, the first rack, the first rotating shaft, the first pointer and the first gear, the first rack of one set of measuring mechanisms is in the initial position state, under the influence of the tension of the supporting spring, and abuts against the end of the first sleeve. When the telescopic rod moves inward, it pushes the first rack to move inward, and drives the first gear and the first pointer to rotate. When the telescopic rod moves outward, it is affected by the non-return mechanism, so that the first rack The rack is kept in place, so that the maximum contraction of the spacing between the steel bars can be recorded. In the initial position state, the first rack of another set of measuring mechanisms is affected by the tension of the supporting spring, and the first limiting ring abuts against the second limiting ring. When the telescopic rod moves toward the outside, the first rack is pushed to move toward the inside, and the first gear and the first pointer are driven to rotate. When the telescopic rod moves toward the inside, the first rack is kept in place by the non-return mechanism, so that the maximum expansion of the spacing between the steel bars can be recorded. When the button is pressed, the mounting rod drives the first rotating shaft to move in a direction away from the first rack, the first gear is disengaged from the first rack, the first rotating shaft is disengaged from the damping member, and the non-return mechanism is disengaged from the first rack, so that the first rack and the first rotating shaft are reset;

[0021] 2. Under the cooperation of the third rotating shaft, the ratchet, the elastic ratchet piece and the second pointer, when the telescopic rod in one set of measuring mechanisms moves inward, the driving ratchet drives the second pointer to rotate, so that the second pointer rotates in one direction all the time when driven, thereby being able to record the superimposed value of the contraction of the spacing between the steel bars; when the telescopic rod in the other set of measuring mechanisms moves outward, the driving ratchet drives the second pointer to rotate, so that the second pointer rotates in one direction all the time when driven, thereby being able to record the superimposed value of the expansion of the spacing between the steel bars;

[0022] 3. With the cooperation of the fourth rotating shaft, the second rack, the second gear and the third pointer, when the telescopic rod in the measuring mechanism moves inwards and outwards, the third pointer can display the expansion or contraction of the current steel bar spacing in real time;

[0023] 4. By setting the clamping wheels, when clamping the steel bar, by rotating the first clamping rod and the second clamping rod, the four clamping wheels clamp the side wall of the steel bar together, and a number of groups of balls are set on the inner wall of the V-shaped ring groove of the clamping wheel, so that when the clamping wheel passes through the ribs on the side wall of the steel bar, it passes over it through the gap between the balls, thereby reducing the vibration effect on the telescopic rod and improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0025] Figure 2 yes Figure 1 A partial enlarged view of part A.

[0026] Figure 3 It is a schematic diagram of the structure inside the sleeve in the present invention.

[0027] Figure 4 It is a cross-sectional view of the measuring mechanism part of the present invention.

[0028] Figure 5 yes Figure 3 A partial enlarged view of part B.

[0029] Figure 6 It is a partial view of the measuring mechanism part of the present invention.

[0030] Figure 7 It is a structural schematic diagram of the clamping assembly in the present invention.

[0031] In the figure: 1, measuring rod; 2, clamping assembly; 3, cylinder; 4, measuring mechanism; 5, button; 6, mounting rod; 7, reset spring; 8, telescopic rod; 9, first rotating shaft; 10, first pointer; 11, first transparent dial; 12, scale; 13, reset torsion spring; 14, first gear; 15, first sleeve; 16, first plug-in rod; 17, first rack; 18, first limit ring; 19, second limit ring; 20, support spring; 21, speed change mechanism; 22, second rotating shaft; 23, first transmission pinion; 24, second transmission gear; 25, non-return mechanism; 2 6. Spring sheet; 27. Friction block; 28. Damping member; 29. ​​Fixed block; 30. Rubber block; 31. Third rotating shaft; 32. Ratchet; 33. Elastic ratchet; 34. Second pointer; 35. Second transparent dial; 36. Second rack; 37. Fourth rotating shaft; 38. Second gear; 39. Third pointer; 40. Dial; 41. Support plate; 42. Locking bolt; 43. Locking nut; 44. First clamping rod; 45. Second clamping rod; 46. Clamping wheel; 47. V-shaped ring groove; 48. Ball; 49. Ring body; 50. Rotating shaft; 51. Limit bolt. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0033] like Figure 1-Figure 7 As shown, the civil engineering steel bar spacing detection device includes a measuring rod 1 and a clamping assembly 2 respectively arranged at both ends of the measuring rod 1, wherein the measuring rod 1 includes a cylinder 3 and a measuring mechanism 4 respectively arranged at both ends of the cylinder 3, the components of the two sets of measuring mechanisms 4 are the same but the arrangement method is different, and the two sets of clamping assemblies 2 are respectively arranged on the two sets of measuring mechanisms 4, and are used to clamp the two steel bars whose spacing needs to be measured.

[0034] Buttons 5 are respectively provided on both sides of the cylinder 3, and the buttons 5 are slidably inserted into the side walls of the cylinder 3. Each button 5 is respectively connected to a group of measuring mechanisms 4 therein. One side of the button 5 located inside the cylinder 3 is fixedly connected to a mounting rod 6, and a reset spring 7 is provided between the mounting rod 6 and the inner wall of the cylinder 3.

[0035] One set of measuring mechanisms 4 includes a telescopic rod 8 slidably connected to the cylinder 3 along the length direction of the cylinder 3, a first rotating shaft 9 rotatably connected to the mounting rod 6, and a first pointer 10 fixedly connected to the top of the first rotating shaft 9. A first transparent dial 11 corresponding to the first pointer 10 is provided on the cylinder 3, and a scale 12 is provided around the circumference of the first transparent dial 11. A reset torsion spring 13 is provided between the first rotating shaft 9 and the mounting rod 6. A first gear 14 is fixedly connected to the first rotating shaft 9. One end of the telescopic rod 8 located in the cylinder 3 is fixedly connected to a first sleeve 15. A first plug-in rod 16 is slidably inserted in the first sleeve 15, and the first plug-in rod 16 is fixedly connected to a first rack 17 that is transmission-connected to the first gear 14. A first limiting ring 18 is fixedly connected to the open end of the first sleeve 15, and one end of the first plug-in rod 16 located in the first sleeve 15 is fixedly connected to a second limiting ring 19. A support spring 20 is provided between the end of the first plug-in rod 16 and the bottom of the first sleeve 15, and the support springs 20 in one group of measuring mechanisms 4 are in a contracted state, and the support springs 20 in the other group of measuring mechanisms 4 are in an extended state.

[0036] In order to make the first pointer 10 indicate more sensitively, a speed change mechanism 21 is provided between the first rack 17 and the first gear 14. The speed change mechanism 21 includes a second rotating shaft 22 rotatably connected to the cylinder 3, a first transmission pinion 23 fixedly connected to the second rotating shaft 22 and meshed with the first rack 17, and a second transmission gearwheel 24 fixedly connected to the second rotating shaft 22 and meshed with the first gear 14.

[0037] A check mechanism 25 is provided between the mounting rod 6 and the first rack 17. The check mechanism 25 includes a spring sheet 26 fixedly connected to the mounting rod 6, and a friction block 27 fixedly connected to the end of the spring sheet 26 and abutting against the first rack 17. One end of the spring sheet 26 in one group of measuring mechanisms 4 is inclined toward the inside of the cylinder 3 away from the mounting rod 6, and the other end of the spring sheet 26 in the other group of measuring mechanisms 4 is inclined toward the outside of the cylinder 3 away from the mounting rod 6.

[0038] A damping member 28 is provided between the first rotating shaft 9 and the inner wall of the cylinder 3. The damping member 28 includes a pair of fixed blocks 29 fixedly connected to the inner wall of the cylinder 3 and arranged at intervals. The opposite side walls of the fixed blocks 29 are fixedly connected with rubber blocks 30. The rubber blocks 30 gradually narrow in a trapezoidal structure in the direction away from the fixed blocks 29. The first rotating shaft 9 slides along the sliding direction of the button 5 and is inserted between the rubber blocks 30 on both sides.

[0039] The measuring mechanism 4 further includes a third rotating shaft 31 rotatably connected to the mounting rod 6, a ratchet 32 ​​fixedly connected to the third rotating shaft 31, an elastic ratchet piece 33 fixedly connected to the side wall of the first sleeve 15 and matched with the ratchet 32, and a second pointer 34 fixedly connected to the top of the third rotating shaft 31. A reset torsion spring 13 is provided between the third rotating shaft 31 and the mounting rod 6. The elastic ratchet pieces 33 in one group of measuring mechanisms 4 are tilted in a direction away from the telescopic rod 8, and the elastic ratchet pieces 33 in one group of measuring mechanisms 4 are tilted in a direction close to the telescopic rod 8. A damping member 28 is provided between the third rotating shaft 31 and the inner wall of the cylinder 3. The third rotating shaft 31 is slidably inserted between the rubber blocks 30 on both sides along the sliding direction of the button 5. A second transparent dial 35 corresponding to the second pointer 34 is provided on the cylinder 3, and a scale 12 is provided around the circumference of the second transparent dial 35.

[0040] The measuring mechanism 4 also includes a second rack 36 fixedly connected to one end of the telescopic rod 8 located inside the cylinder 3, a fourth rotating shaft 37 rotatably connected to the middle position inside the cylinder 3, a second gear 38 coaxially fixedly connected to the fourth rotating shaft 37, the second racks 36 in the two groups of measuring mechanisms 4 are meshed with the second gear 38, the top end of the fourth rotating shaft 37 passes through the cylinder 3 and is provided with a third pointer 39, and a dial 40 is provided on the portion of the outer wall of the cylinder 3 corresponding to the third pointer 39.

[0041] The clamping assembly 2 includes a support plate 41 fixedly connected to the end of the telescopic rod 8, a locking bolt 42 passing through the support plate 41, a locking nut 43 threadedly connected to the locking bolt 42, a first clamping rod 44 and a second clamping rod 45 hinged to the locking bolt 42 in the middle, and four sets of clamping wheels 46 rotatably connected to the two ends of the first clamping rod 44 and the two ends of the second clamping rod 45, and a V-shaped ring groove 47 is provided in the middle of the clamping wheel 46.

[0042] Four groups of balls 48 are provided on the peripheral wall of the clamping wheel 46. The four groups of balls 48 are arranged axially along the clamping wheel 46. Each group of balls 48 is evenly distributed around the circumference of the clamping wheel 46, and the four groups of balls 48 are staggered in the circumference of the clamping wheel 46. Ball grooves are opened on the peripheral wall of the clamping wheel 46 corresponding to the balls 48, and the balls 48 are rollingly connected in the ball grooves.

[0043] The clamping wheel 46 includes four ring bodies 49 corresponding to each group of balls 48. The ends of the first clamping rod 44 and the second clamping rod 45 are rotatably connected to a rotating shaft 50. The ring bodies 49 are sleeved on the rotating shaft 50, and limit bolts 51 are respectively provided on both sides of the clamping wheel 46 on the rotating shaft 50.

[0044] By setting the clamping wheel 46, when clamping the steel bar, by rotating the first clamping rod 44 and the second clamping rod 45, the four clamping wheels 46 clamp the side wall of the steel bar together, and a plurality of groups of balls 48 are set on the inner wall of the V-shaped ring groove 47 of the clamping wheel 46, so that when the clamping wheel 46 passes through the ribs on the side wall of the steel bar, it passes over it through the gap between the balls 48, thereby reducing the vibration effect on the telescopic rod 8 and improving the measurement accuracy.

[0045] The implementation principle of the present invention is:

[0046] When measuring the spacing between steel bars, first adjust the telescopic rods 8 on both sides to the calibrated distance, and after clamping the steel bars through the clamping assembly 2, move along the length direction of the two steel bars, so that when the telescopic rods 8 on both sides are at positions where the spacing between the steel bars is different, the telescopic rods 8 move in the cylinder 3, and under the cooperation of the first sleeve 15, the first plug-in rod 16, the first rack 17, the first rotating shaft 9, the first pointer 10 and the first gear 14, the first rack 17 of one set of measuring mechanisms 4 is in the initial position state, under the influence of the tension of the support spring 20, and abuts against the end of the first sleeve 15. When the telescopic rod 8 moves inward, it pushes the first rack 17 to move inward, and drives the first gear 14 and the first pointer to rotate. When the telescopic rod 8 moves outward, it is acted on by the non-return mechanism 25 to keep the first rack 17 In the original position, the maximum contraction of the spacing between the steel bars can be recorded. The first rack 17 of the other group of measuring mechanisms 4 is in the initial position state, and is affected by the tension of the support spring 20. The first limit ring 18 abuts against the second limit ring 19. When the telescopic rod 8 moves toward the outside, the first rack 17 is pushed to move inward, and the first gear 14 and the first pointer are driven to rotate. When the telescopic rod 8 moves inward, the first rack 17 is kept in the original position by the action of the non-return mechanism 25, so that the maximum expansion of the spacing between the steel bars can be recorded. When the button 5 is pressed, the mounting rod 6 drives the first rotating shaft 9 to move in the direction away from the first rack 17, the first gear 14 is disengaged from the first rack 17, the first rotating shaft 9 is disengaged from the damping member 28, and the non-return mechanism 25 is disengaged from the first rack 17, so that the first rack 17 and the first rotating shaft 9 are reset;

[0047] Under the cooperation of the third rotating shaft 31, the ratchet 32, the elastic ratchet piece 33 and the second pointer 34, when the telescopic rod 8 in one set of the measuring mechanisms 4 moves inward, the driving ratchet 32 ​​drives the second pointer 34 to rotate, so that the second pointer 34 rotates in one direction all the time when driven, thereby being able to record the superimposed value of the contraction of the spacing between the steel bars; when the telescopic rod 8 in the other set of the measuring mechanisms 4 moves outward, the driving ratchet 32 ​​drives the second pointer 34 to rotate, so that the second pointer 34 rotates in one direction all the time when driven, thereby being able to record the superimposed value of the expansion of the spacing between the steel bars;

[0048] With the cooperation of the fourth rotating shaft 37, the second rack 36, the second gear 38 and the third pointer 39, when the telescopic rod 8 in the measuring mechanism 4 moves inward or outward, the third pointer 39 can display the expansion or contraction of the current steel bar spacing in real time.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A civil engineering steel bar spacing detection device, characterized in that: The measuring rod (1) comprises a measuring rod (1) and a clamping assembly (2) respectively arranged at two ends of the measuring rod (1); the measuring rod (1) comprises a cylinder (3) and a measuring mechanism (4) respectively arranged at two ends of the cylinder (3); two groups of the clamping assembly (2) are respectively arranged on two groups of the measuring mechanism (4); buttons (5) are respectively arranged on both sides of the cylinder (3); the buttons (5) are slidably inserted into the side wall of the cylinder (3); a mounting rod (6) is fixedly connected to one side of the button (5) located in the cylinder (3); a reset spring (7) is arranged between the mounting rod (6) and the inner wall of the cylinder (3); One group of the measuring mechanisms (4) comprises a telescopic rod (8) slidably connected to the cylinder (3) along the length direction of the cylinder (3), a first rotating shaft (9) rotatably connected to the mounting rod (6), and a first pointer (10) fixedly connected to the top of the first rotating shaft (9); a reset torsion spring (13) is provided between the first rotating shaft (9) and the mounting rod (6); a first gear (14) is fixedly connected to the first rotating shaft (9); one end of the telescopic rod (8) located in the cylinder (3) is fixedly connected to a first sleeve (15); a first plug-in rod (16) is slidably plugged into the first sleeve (15); the first plug-in rod (16) is fixedly connected to a first rack (17) transmission-connected to the first gear (14); the first The open end of the sleeve (15) is fixedly connected to a first limiting ring (18); one end of the first plug-in rod (16) located in the first sleeve (15) is fixedly connected to a second limiting ring (19); a support spring (20) is provided between the end of the first plug-in rod (16) and the bottom of the first sleeve (15); a group of support springs (20) in the measuring mechanism (4) is in a contracted state; a non-return mechanism (25) is provided between the mounting rod (6) and the first rack (17); a damping member (28) is provided between the first rotating shaft (9) and the inner wall of the cylinder (3); a first transparent dial (11) corresponding to the first pointer (10) is provided on the cylinder (3); and a scale (12) is provided around the circumference of the first transparent dial (11); The non-return mechanism (25) comprises a spring sheet (26) fixedly connected to the mounting rod (6), and a friction block (27) fixedly connected to the end of the spring sheet (26) and abutting against the first rack (17), wherein one end of the spring sheet (26) in a group of the measuring mechanisms (4) away from the mounting rod (6) is arranged to be inclined toward the inside of the cylinder (3); The measuring mechanism (4) further comprises a third rotating shaft (31) rotatably connected to the mounting rod (6), a ratchet (32) fixedly connected to the third rotating shaft (31), an elastic ratchet piece (33) fixedly connected to the side wall of the first sleeve (15) and cooperating with the ratchet (32), and a second pointer (34) fixedly connected to the top of the third rotating shaft (31); a reset torsion spring (13) is provided between the third rotating shaft (31) and the mounting rod (6); the elastic ratchet piece (33) in one group of the measuring mechanisms (4) is inclined in a direction away from the telescopic rod (8); a damping member (28) is provided between the third rotating shaft (31) and the inner wall of the cylinder (3); a second transparent dial (35) corresponding to the second pointer (34) is provided on the cylinder (3); and a scale (12) is provided around the circumference of the second transparent dial (35).

2. The civil engineering steel bar spacing detection device according to claim 1, characterized in that: A speed change mechanism (21) is provided between the first rack (17) and the first gear (14), and the speed change mechanism (21) comprises a second rotating shaft (22) rotatably connected to the cylinder (3), a first transmission pinion (23) fixedly connected to the second rotating shaft (22) and meshing with the first rack (17), and a second transmission gear (24) fixedly connected to the second rotating shaft (22) and meshing with the first gear (14).

3. The civil engineering steel bar spacing detection device according to claim 1, characterized in that: The damping member (28) comprises a pair of fixed blocks (29) fixedly connected to the inner wall of the cylinder (3) and arranged at intervals, and opposite side walls of the fixed blocks (29) are fixedly connected to rubber blocks (30), and the rubber blocks (30) gradually narrow in a direction away from the fixed blocks (29) to form a trapezoidal structure, and the first rotating shaft (9) or the third rotating shaft (31) is slidably inserted between the rubber blocks (30) on both sides along the sliding direction of the button (5).

4. The civil engineering steel bar spacing detection device according to claim 1, characterized in that: The support spring (20) in the other group of the measuring mechanisms (4) is in an extended state, and the end of the spring sheet (26) away from the mounting rod (6) is inclined toward the outside of the cylinder (3), and the elastic ratchet sheet (33) is inclined toward a direction close to the telescopic rod (8).

5. The civil engineering steel bar spacing detection device according to claim 4, characterized in that: The measuring mechanism (4) further comprises a second rack (36) fixedly connected to one end of the telescopic rod (8) located inside the cylinder (3); a fourth rotating shaft (37) is rotatably connected to the middle position inside the cylinder (3); a second gear (38) is coaxially fixedly connected to the fourth rotating shaft (37); the second racks (36) in the two groups of measuring mechanisms (4) are meshed with the second gear (38); the top end of the fourth rotating shaft (37) passes through the cylinder (3) and is provided with a third pointer (39); and a dial (40) is provided on the outer wall of the cylinder (3) corresponding to the third pointer (39).

6. The civil engineering steel bar spacing detection device according to claim 1, characterized in that: The clamping assembly (2) comprises a support plate (41) fixedly connected to the end of the telescopic rod (8), a locking bolt (42) passing through the support plate (41), a locking nut (43) threadedly connected to the locking bolt (42), a first clamping rod (44) and a second clamping rod (45) hinged to the locking bolt (42) in the middle, and four groups of clamping wheels (46) rotatably connected to the two ends of the first clamping rod (44) and the two ends of the second clamping rod (45), respectively, and a V-shaped ring groove (47) is provided in the middle of the clamping wheel (46).

7. The civil engineering steel bar spacing detection device according to claim 6, characterized in that: A plurality of groups of balls (48) are provided on the peripheral wall of the clamping wheel (46), and the plurality of groups of balls (48) are arranged axially along the clamping wheel (46). Each group of balls (48) is evenly distributed around the circumference of the clamping wheel (46), and the plurality of groups of balls (48) are staggeredly arranged in the circumferential direction of the clamping wheel (46). Ball grooves are provided on the peripheral wall of the clamping wheel (46) corresponding to the balls (48), and the balls (48) are rollingly connected in the ball grooves.

8. The civil engineering steel bar spacing detection device according to claim 7, characterized in that: The clamping wheel (46) comprises a plurality of ring bodies (49) corresponding one to each group of balls (48); the ends of the first clamping rod (44) and the ends of the second clamping rod (45) are both rotatably connected to a rotating shaft (50); the plurality of ring bodies (49) are sleeved on the rotating shaft (50); and limiting bolts (51) are respectively provided on both sides of the clamping wheel (46) on the rotating shaft (50).

Images