CN212180516U

CN212180516U - Concrete resiliometer

Info

Publication number: CN212180516U
Application number: CN202020928518.2U
Authority: CN
Inventors: 聂东; 邓静; 何映波
Original assignee: Sichuan Jingda Engineering Testing Co ltd
Current assignee: Sichuan Jingda Engineering Testing Co ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2020-12-18
Anticipated expiration: 2030-05-27

Abstract

The utility model relates to a concrete resiliometer belongs to engineering check out test set field, it includes casing and impact rod, first holding tank has been seted up along the axial of casing on the casing, the impact rod is worn to establish in first holding tank, first holding tank internal rotation is provided with the sleeve, the impact rod is worn to establish in the sleeve, the ring channel with first holding tank intercommunication is seted up along the circumference of casing to the outer wall of casing, the ring channel divide into casing and lower casing with the casing, casing and sleeve fixed connection down, coaxial fixed cover is equipped with the gear on the sleeve, coaxial cover is equipped with the ring gear with it meshes and on the gear. When the elastic striking rod needs to rotate, the gear ring rotates in the annular groove, the gear ring drives the gear to rotate, the gear drives the sleeve to rotate, the elastic striking rod rotates under the driving of the sleeve, and after the elastic striking rod rotates by a proper angle, the elastic striking rod continues to detect, so that the rotating precision can be effectively improved, the same rotating angle at each time is ensured, and the detecting precision is effectively improved.

Description

Concrete resiliometer

Technical Field

The utility model relates to an engineering check out test set field, in particular to concrete resiliometer.

Background

The concrete resiliometer is a restoring force of instantaneous elastic deformation generated by driving a striking hammer by a spring and striking the surface of concrete by a striking rod, and the restoring force is used for driving a pointer to rebound by the striking hammer and indicating the rebound distance. The compression strength of concrete is estimated by using the rebound value as one of indexes related to the compression strength of concrete.

Chinese patent No. CN209027939U discloses a concrete resiliometer, which includes a pen-shaped housing and a tapping rod extending from the housing; when using concrete resiliometer to carry out compressive strength to the concrete and detecting, need make the mark at the concrete surface that needs detect earlier, then hold the casing by staff's both hands, carry out the suppress detection to 16 detection check in proper order, for the accuracy that improves the detection, whenever do the suppress test of quartic, need the staff to rotate 90 with the bouncing rod, detect up to accomplishing whole 16 times.

The following defect exists in above-mentioned prior art scheme, when being rotated the tapping pole by the staff, it is difficult to guarantee that the angle of rotation at every turn is 90, this accuracy that has just reduced and has used concrete resiliometer test concrete compressive strength.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a concrete resiliometer has the advantage that improves the test precision.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a concrete resiliometer, includes casing, impact rod and sleeve, first holding tank has been seted up along the axial of casing on the casing, the sleeve rotates and sets up in first holding tank, the impact rod sets up in telescopic one end, the ring channel with first holding tank intercommunication is seted up along the circumference of casing to the outer wall of casing, the ring channel divide into casing and lower casing with the casing, casing and sleeve fixed connection down, coaxial fixed cover is equipped with first gear on the sleeve, coaxial cover is equipped with the ring gear with first gear engagement on the first gear, upward be provided with the spacing subassembly that is used for injecing ring gear turned angle on the casing.

Through adopting above-mentioned technical scheme, in concrete resiliometer's use, when needs to the impact rod carry out the pivoted time, at the ring channel internal rotation ring gear, the ring gear drives gear revolve, the gear drives the sleeve and rotates, the impact rod rotates under telescopic drive, after the ring gear rotated suitable angle, fix the position of ring gear by spacing subassembly, then continue to detect, drive gear revolve through the ring gear, finally drive the impact rod and rotate, and inject ring gear pivoted angle through spacing subassembly, can improve pivoted precision effectively, guarantee that turned angle at every turn is all the same, the precision of detection has been improved effectively.

The present invention may be further configured in a preferred embodiment as: spacing subassembly includes spacer pin and spacing ring, the spacing ring rotates the cover and establishes on last casing, spacer ring and ring gear fixed connection, radially seted up four mounting grooves, adjacent two along the casing on the outer wall of last casing the central angle contained angle that the mounting groove corresponds is 90, the spacer pin slides and sets up in the mounting groove, be provided with in the mounting groove and be used for ordering about the first elastic component of spacer pin towards keeping away from the mounting groove motion, set up on the inner wall of spacing ring and supply spacer pin male card hole, it is provided with the first anticreep portion that is used for preventing the spacer pin from breaking away from the mounting groove to go up casing and spacer pin.

Through adopting above-mentioned technical scheme, when rotating the ring gear, the spacing ring rotates under the drive of ring gear, the spacer pin is contradicted with the inner wall of spacing ring, insert the card downthehole under the effect of first elastic component until the spacer pin, the spacer pin makes the rigidity of spacing ring with the cooperation of card hole, spacer ring and ring gear fixed connection, the position of ring gear is also fixed, the gear can't continue to rotate, the impact rod also can't rotate, contained angle between the axis of adjacent spacer pin is 90, can realize fixedly after the impact rod rotates again when playing sign turned angle, avoided the impact rod to appear deflecting in the use, the effectual detection precision that improves concrete resiliometer.

The present invention may be further configured in a preferred embodiment as: the first anti-falling part comprises a first stop block and a first surrounding edge, the first stop block is arranged at one end, close to the mounting groove, of the limiting pin, and the second surrounding edge is arranged at the groove opening of the mounting groove.

Through adopting above-mentioned technical scheme, the spacer pin moves towards the direction of keeping away from the mounting groove under the effect of first elastic component, and the roof of first dog and the diapire butt of first surrounding edge make the rigidity of spacer pin, prevent that the spacer pin from popping out the mounting groove under the effect of first elastic component, the effectual security that has improved concrete resiliometer.

The present invention may be further configured in a preferred embodiment as: the card downthehole slip is provided with the push rod, go up the cover and be equipped with the second elastic component that is used for driving about the push rod and keeps away from card hole direction motion, the downthehole second surrounding edge that is used for preventing that the push rod from breaking away from the card hole that is provided with of card.

Through adopting above-mentioned technical scheme, promote the push rod along the axial direction in card hole in the card hole, the push rod is at the effect of external force to the downthehole motion of card, and the final push rod is released the spacer pin that will insert in the card hole, and the position of spacer ring and last casing is not fixed, utilizes the push rod to release the spacer pin, has increased lifting surface area, has made things convenient for staff's operation, has improved concrete resiliometer's availability factor.

The present invention may be further configured in a preferred embodiment as: still include two branches with slide bar fixed connection between the branch, go up the casing setting on the slide bar, every the second holding tank has been seted up along the length direction of branch to the one end that the slide bar was kept away from to branch, it is provided with the movable rod to slide in the second holding tank, be provided with the third elastic component that is used for ordering about branch and keeps away from the second holding tank in the second spout, the movable rod is close to the fixed second dog that is provided with of one end of branch, the fixed third that is used for with second dog butt in order to prevent that the movable rod from breaking away from the second holding tank of notch department of second holding tank encloses the limit.

Through adopting above-mentioned technical scheme, in the testing process of concrete resiliometer, place the second movable rod on waiting to detect the region, press down the resiliometer by the staff, the resiliometer drives slide bar downstream, the slide bar drives branch downstream, the branch extrusion is located the third elastic component of second holding tank, elastic potential energy is stored to the third elastic component, when detecting the completion, the resiliometer kick-backs, branch upward movement under the effect of third elastic component, second stopper and third limit butt, prevent that the movable rod from breaking away from the second holding tank, branch is along vertical direction up-and-down motion in the second holding tank, the effectual concrete resiliometer that has avoided takes place the skew at the in-process of pressing, the detection precision of concrete resiliometer has been improved.

The present invention may be further configured in a preferred embodiment as: the both ends of slide bar are all fixed and are provided with branch, every the one end that the slide bar was kept away from to branch has been seted up the second holding tank, it is provided with the movable rod to slide in the second holding tank, is provided with the third elastic component that is used for ordering about the movable rod and keeps away from the second holding tank in the second holding tank, the movable rod is close to the fixed second dog that is provided with of one end of branch, the fixed third surrounding edge that is provided with second dog butt in order to prevent that the movable rod from breaking away from the second holding tank in notch department of second holding tank.

Through adopting above-mentioned technical scheme, need be in the even compressive strength who detects 16 points of waiting of region to be measured in concrete resiliometer's use, place slide bar and the plane level that the region to be measured is located, slider slides on the length direction of slide bar, scale numerical value according to the sign on the slider corresponds, press the concrete resiliometer downwards one by one, come the reading through sign and scale, let the position of pressing the resiliometer each time more accurate, the detection precision of concrete resiliometer has been improved effectively.

The present invention may be further configured in a preferred embodiment as: every the movable rod is kept away from the fixed brace table that is provided with of one end of second holding tank, the fixed skid resistant course that is provided with of one end that the second holding tank was kept away from to the brace table.

Through adopting above-mentioned technical scheme, pressing the in-process of resiliometer, brace table and the surface contact of the region that awaits measuring make area of contact increase, have guaranteed that the resiliometer is in the vertical state all the time at the in-process that presses, and the skid resistant course has increased the frictional force on resiliometer and the region surface that awaits measuring, and the resiliometer produces the skew in the effectual use of having avoided, has improved the detection precision that can the concrete resiliometer.

The present invention may be further configured in a preferred embodiment as: every the mounting hole has been seted up along the direction of perpendicular to branch on the branch, the mounting hole internal rotation is provided with the pivot, fixed cover is equipped with the connecting block in the pivot, the fixed laser indicator that is provided with on the connecting block, be provided with the fastener that is used for the fixed connection piece position in the pivot.

Through adopting above-mentioned technical scheme, in the use of resiliometer, the angle of laser pilot lamp has been adjusted through the fastener, can need not beat the point on the surface of waiting to detect the region like this and seal, avoids influencing the outward appearance of building.

To sum up, the utility model discloses an following at least one useful technological effect:

firstly, the gear is driven to rotate through the gear ring, the striking rod is finally driven to rotate, and the rotation angle of the gear ring is limited through the limiting component, so that the rotation precision can be effectively improved, the same rotation angle every time is ensured, and the detection precision is effectively improved;

the included angle between the axes of the adjacent limiting pins is 90 degrees, the rotation angle is marked, and meanwhile, the position of the elastic striking rod can be fixed after the elastic striking rod rotates, so that the elastic striking rod is prevented from deflecting in the use process, and the detection precision of the concrete resiliometer is effectively improved;

in the process of pressing the resiliometer, the support table is in contact with the surface of the area to be detected, so that the contact area is increased, the resiliometer is guaranteed to be always in a vertical state in the pressing process, the friction force between the resiliometer and the surface of the area to be detected is increased through the anti-slip layer, the resiliometer is effectively prevented from deviating in the using process, and the detection precision of the concrete resiliometer is improved;

in the using process of the resiliometer, the angle of the laser indicator lamp is adjusted through the fastening piece, so that the laser indicator lamp is not needed to be used for point stamping on the surface of the area to be detected, and the influence on the appearance of a building is avoided.

Drawings

Fig. 1 is a schematic structural view of the main body of the present invention;

fig. 2 is a cross-sectional view of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a schematic structural diagram of the slider of the present invention;

fig. 5 is a schematic structural view of the second accommodating groove of the present invention.

Reference numerals: 1. a housing; 11. a first accommodating groove; 12. a sleeve; 13. a tapping rod; 14. an annular groove; 15. an upper housing; 16. a lower housing; 17. a bearing; 18. a first gear; 19. a ring gear; 2. a limiting component; 21. a limiting ring; 22. a spacing pin; 23. mounting grooves; 231. a first elastic member; 24. a clamping hole; 241. a push rod; 242. a second surrounding edge; 243. a second elastic member; 3. a first anti-drop part; 31. a first stopper; 32. a first surrounding edge; 4. a slider; 41. a chute; 411. identifying; 42. a slide bar; 421. a scale; 43. a first fastener; 431. a threaded hole; 432. tightly abutting against the bolt; 44. a strut; 441. mounting holes; 442. a rotating shaft; 443. connecting blocks; 444. a laser indicator light; 445. a second fastener; 45. a second accommodating groove; 451. a third surrounding edge; 452. a third elastic member; 46. a movable rod; 461. a second stopper; 462. a support table; 463. and an anti-slip layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, a concrete resiliometer comprises a housing 1 and an impact rod 13, wherein the housing 1 is cylindrical, the lower part of the housing 1 is folded to form a pen point, a first accommodating groove 11 is formed in the housing 1 along the axial direction of the housing 1, a sleeve 12 is rotatably arranged in the first accommodating groove 11, the sleeve 12 is cylindrical, the size of the sleeve is matched with that of the first accommodating groove 11, and the impact rod 13 is arranged in the sleeve 12 in a penetrating manner.

As shown in fig. 2, an annular groove 14 communicated with the first receiving groove 11 is formed in the outer wall of the casing 1 along the circumferential direction of the casing 1, the casing 1 is divided into an upper casing 15 and a lower casing 16 by the annular groove 14, the lower casing 16 is fixedly connected with the sleeve 12, a bearing 17 is fixedly arranged at one end of the sleeve 12 far away from the lower casing 16, the bearing 17 is fixedly connected with the upper casing 15, a first gear 18 is coaxially fixedly sleeved on the sleeve 12, and a gear ring 19 meshed with the first gear 18 is coaxially sleeved on the first gear 18. When the impact rod 13 needs to rotate, the gear ring 19 is rotated by a worker, the gear ring 19 drives a gear which is meshed with the gear ring to rotate, the gear drives the sleeve 12 which is coaxially fixed to rotate, the sleeve 12 drives the impact rod 13 to rotate, the rotating angle of the impact rod 13 can be controlled accurately, and the accuracy of the concrete resiliometer during compression resistance detection is effectively improved.

As shown in fig. 2 and 3, the upper housing 15 is provided with a limiting assembly 2 for limiting the rotation angle of the gear ring 19, and the limiting assembly 2 comprises a limiting pin 22 and a limiting ring 21. The limiting ring 21 is rotatably sleeved on the upper shell 15, and the inner wall of the limiting ring 21 is fixedly connected with the gear ring 19. Four mounting grooves 23 are formed in the outer wall of the upper shell 15 along the direction perpendicular to the axial direction of the upper shell 15, and the included angle between the two adjacent mounting grooves 23 in the axial direction is 90 degrees. The limit pin 22 is slidably disposed in the mounting groove 23, and a locking hole 24 for inserting the limit pin 22 is formed on the inner wall of the limit ring 21. When the gear ring 19 rotates, the limit ring 21 is driven by the gear ring 19 to rotate, the limit pin 22 is abutted against the inner wall of the limit ring 21 until the limit pin 22 is inserted into the clamping hole 24 under the action of the first elastic piece 231, the limit pin 22 is matched with the clamping hole 24 to fix the position of the limit ring 21, the limit ring 21 is fixedly connected with the gear ring 19, the position of the gear ring 19 is also fixed, the gear cannot continue to rotate, and the striking rod 13 cannot rotate. The included angle between the axes of adjacent limiting pins 22 is 90 degrees, the rotation angle of the mark 411 is played, and meanwhile, the position of the elastic striking rod 13 can be fixed after the elastic striking rod 13 rotates, so that the elastic striking rod 13 is prevented from deflecting in the use process, and the detection precision of the concrete rebound tester is effectively improved.

Wherein, as shown in fig. 3, be provided with the first anticreep portion 3 that is used for preventing that spacer pin 22 breaks away from mounting groove 23 in the mounting groove 23, first anticreep portion 3 includes first dog 31 and first surrounding edge 32, first dog 31 sets up the one end that is close to mounting groove 23 at spacer pin 22, first surrounding edge 32 sets up the notch department at mounting groove 23, be provided with in the mounting groove 23 and be used for driving about spacer pin 22 towards keeping away from the first elastic component 231 of mounting groove 23 motion, first elastic component 231 is the pressure spring, the one end of pressure spring and the diapire fixed connection of mounting groove 23, the other end and the diapire fixed connection of first dog 31. Spacing pin 22 moves towards the direction of keeping away from mounting groove 23 under the effect of first elastic component 231, and the diapire butt of the roof of first dog 31 and first surrounding edge 32 makes spacing pin 22's rigidity, places spacing pin 22 and pops out mounting groove 23 under the effect of first elastic component 231, the effectual security that improves concrete resiliometer.

In addition, as shown in fig. …, a push rod 241 is slidably disposed in the card hole 24, and a second surrounding edge 242 for preventing the push rod 241 from being separated from the card hole 24 is disposed in the card hole 24. The push rod 241 is sleeved with a second elastic member 243 for driving the push rod 241 to move towards the direction away from the clamping hole 24, the second elastic member 243 is a pressure spring, one end of the pressure spring is fixedly connected with one end of the push rod 241 close to the limit pin 22, and the other end of the pressure spring is fixedly connected with the bottom wall of the second surrounding edge 242.

As shown in fig. 4, a sliding block 4 is disposed on the upper housing 15, a sliding groove 41 is disposed on a side wall of the sliding block 4 away from the upper housing 15 along a length direction of the sliding block 4, a sliding rod 42 is slidably disposed in the sliding groove 41, and the sliding groove 41 is a C-shaped groove adapted to the sliding rod 42. The sliding rod 42 is fixedly provided with a scale 421, the sliding block 4 is fixedly provided with a mark 411, the sliding block 4 is provided with a first fastener 43 for fixing the position of the sliding block 4, the first fastener 43 is a fastening bolt, the bottom wall of the sliding block 4 is provided with a threaded hole 431 penetrating through the sliding groove 41, and the fastening bolt is threaded in the threaded hole 431. Need be in the even compressive strength who detects 16 points of waiting of region to be measured in concrete resiliometer's use, place slide bar 42 and the plane level that the region to be measured is located, slide block 4 on slide bar 42's length direction, according to the scale 421 numerical value that sign 411 on the slide block 4 corresponds, press the concrete resiliometer downwards one by one, come the reading through sign 411 and scale 421, let the position of pressing the resiliometer each time more accurate.

As shown in fig. 5, supporting rods 44 are fixedly arranged at both ends of the sliding rod 42, a second accommodating groove 45 is formed in the length direction of each supporting rod 44 at one end of each supporting rod 44 far away from the sliding rod 42, a movable rod 46 is slidably arranged in each second accommodating groove 45, a second stopper 461 is fixedly arranged at one end of each movable rod 46 close to the corresponding supporting rod 44, a third surrounding edge 451 which is abutted to the corresponding second stopper 461 to prevent the movable rod 46 from being detached from the corresponding second accommodating groove 45 is fixedly arranged at the notch of each second accommodating groove 45, a third elastic piece 452 which is used for driving the movable rod 46 to be far away from the corresponding second accommodating groove 45 is arranged in each second accommodating groove 45, each third elastic piece 452 is a pressure spring, one end of each pressure spring is fixedly connected with the bottom wall of the corresponding second accommodating groove 45.

In the concrete resiliometer's testing process, place second movable rod 46 on waiting to detect the region, by the vertical downward resiliometer of pressing of staff, resiliometer drives slide bar 42 downstream, and slide bar 42 drives branch 44 downstream, and the third elastic component 452 that branch 44 extrusion is located second holding tank 45, and elastic potential energy is stored to third elastic component 452. When the detection is completed, the supporting rod 44 moves upward under the action of the third elastic element 452, and the second stopper 461 abuts against the third surrounding edge 451, so as to prevent the movable rod 46 from separating from the second receiving groove 45. Branch 44 is along vertical direction up-and-down motion in second holding tank 45, and the effectual concrete resiliometer of having avoided takes place the skew at the in-process that presses, has improved concrete resiliometer's detection precision.

As shown in fig. 5, a supporting platform 462 is fixedly disposed at an end of each movable rod 46 away from the second receiving groove 45, the supporting platform 462 is a circular truncated cone, and an anti-slip layer 463 is fixedly disposed at an end of the supporting platform 462 away from the second receiving groove 45. At the in-process of pressing the resiliometer, brace table 462 makes area of contact increase with the surface contact of the region that awaits measuring, has guaranteed that the resiliometer is in the vertical state all the time at the in-process that presses, and non-slip layer 463 has increased the frictional force of resiliometer and the region surface that awaits measuring, and the effectual resiliometer that has avoided in the use produces the skew.

In addition, as shown in fig. 5, each strut 44 is provided with a mounting hole 441 along a direction perpendicular to the axial direction of the strut 44, the mounting hole 441 is rotatably provided with a rotating shaft 442, the rotating shaft 442 is provided with a connecting block 443 on the same side as the fixing sleeve, the connecting block 443 is fixedly provided with a laser indicator 444, the rotating shaft 442 is provided with a second fastening member 445 for fixing the position of the connecting block 443, and the second fastening member 445 is a fastening nut. In the use of resiliometer, the angle of laser pilot lamp 444 is adjusted through the fastener, can need not to beat the point on the surface of waiting to detect the region and stamp like this, avoids influencing the outward appearance of building.

The specific operation process comprises the following steps:

before using the resiliometer to carry out the resistance to compression detection to the region of awaiting measuring, place the concrete resiliometer level directly over the region of awaiting measuring, unscrew fastening nut, the angle of adjustment laser pilot lamp 444 makes it present clear mark in the region of awaiting measuring, along slide bar 42's length direction slider 4 slides, slides slider 4 to the position that corresponds through scale 421 on the slide bar 42, then with the perpendicular face of awaiting measuring's power promotion concrete resiliometer, begin to detect. Every 4 points are detected, the push rod 241 is pressed by a worker, the push rod 241 pushes the limit pin 22 out of the clamping hole 24, the limit ring 21 is rotated, the limit ring 21 drives the gear ring 19 to rotate, the gear ring 19 drives the meshed gear to rotate, the gear drives the sleeve 12 to rotate, the sleeve 12 drives the bouncing rod 13 to rotate, after the rotation is 90 degrees, the limit pin 22 is inserted into the clamping hole 24 under the action of the first elastic piece 231, the position of the bouncing rod 13 is fixed, the previous steps are continued at the moment, and the detection of a region to be detected can be completed for three times.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a concrete resiliometer, includes casing (1), sleeve (12) and striking rod (13), first holding tank (11) have been seted up along the axial of casing (1) on casing (1), sleeve (12) rotate and set up in first holding tank (11), striking rod (13) set up the one end at sleeve (12), its characterized in that: the utility model discloses a spacing subassembly (2) that mesh with first gear (18) on the casing (18), the ring channel (14) that communicate with first holding tank (11) are seted up along the circumference of casing (1) to the outer wall of casing (1), ring channel (14) divide into casing (1) casing (15) and casing (16) down, casing (16) and sleeve (12) fixed connection down, be provided with first gear (18) in ring channel (14), first gear (18) and sleeve (12) coaxial fixed connection, coaxial cover is equipped with ring gear (19) with first gear (18) meshing on first gear (18), it is used for injecing ring gear (19) turned angle's spacing subassembly (2) to go up to be provided with on casing (15).

2. A concrete resiliometer according to claim 1, wherein: the limiting component (2) comprises a limiting pin (22) and a limiting ring (21), the limiting ring (21) is rotationally sleeved on the upper shell (15), the limiting ring (21) is coaxially and fixedly connected with the gear ring (19), four mounting grooves (23) are arranged on the outer wall of the upper shell (15) along the radial direction of the upper shell (15), the corresponding central angle between every two adjacent mounting grooves (23) is 90 degrees, the limiting pin (22) is arranged in the mounting groove (23) in a sliding manner, a first elastic piece (231) used for driving the limiting pin (22) to move towards a position far away from the mounting groove (23) is arranged in the mounting groove (23), the inner wall of the limit ring (21) is provided with a clamping hole (24) for inserting the limit pin (22), and the limiting pin (22) and the upper shell (15) are provided with a first anti-falling part (3) for preventing the limiting pin (22) from falling off the mounting groove (23).

3. A concrete resiliometer according to claim 2, wherein: first anticreep portion (3) include first dog (31) and first surrounding edge (32), first dog (31) set up the one end that is close to mounting groove (23) in spacer pin (22), first surrounding edge (32) set up the notch department at mounting groove (23).

4. A concrete resiliometer according to claim 2, wherein: the clamp is characterized in that a push rod (241) is arranged in the clamp hole (24) in a sliding mode, a second elastic piece (243) used for driving the push rod (241) to move towards the direction far away from the clamp hole (24) is sleeved on the push rod (241), and a second surrounding edge (242) used for preventing the push rod (241) from being separated from the clamp hole (24) is arranged in the clamp hole (24).

5. A concrete resiliometer according to claim 1, wherein: still include two branch (44) and slide bar (42), two fixedly connected with slide bar (42) between branch (44), it sets up on slide bar (42) to go up casing (15), every slide bar (42) is kept away from in branch (44) one end along the length direction of branch (44) and has seted up second holding tank (45), it is provided with movable rod (46) to slide in second holding tank (45), be provided with third elastic component (452) that are used for ordering about branch (44) to keep away from second holding tank (45) in second holding tank (45), movable rod (46) are close to the fixed second dog (461) that is provided with of one end of branch (44), the fixed third that is used for with second dog (461) butt in order to prevent that movable rod (46) break away from second holding tank (45) of notch department of second holding tank (45) encloses limit (451).

6. A concrete resiliometer according to claim 5, wherein: go up fixed slider (4) that is provided with on casing (15), spout (41) have been seted up to the one end that last casing (15) was kept away from in slider (4), slide bar (42) slide and set up in spout (41), be provided with first fastener (43) that are used for fixed slider (4) position on slider (4), fixed scale (421) that are provided with on slide bar (42), fixed sign (411) that are provided with on slider (4).

7. A concrete resiliometer according to claim 6, wherein: and a supporting table (462) is fixedly arranged at one end, far away from the second accommodating groove (45), of each movable rod (46).

8. A concrete resiliometer according to claim 7, wherein: each branch (44) is provided with a mounting hole (441) along a direction perpendicular to the branch (44), the mounting hole (441) is rotatably provided with a rotating shaft (442), the rotating shaft (442) is fixedly provided with a connecting block (443), the connecting block (443) is fixedly provided with a laser indicator lamp (444), and the rotating shaft (442) is provided with a second fastening piece (445) for fixing the position of the connecting block (443).