CN109297844B - Nondestructive testing device for reinforced concrete structure - Google Patents
Nondestructive testing device for reinforced concrete structure Download PDFInfo
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- CN109297844B CN109297844B CN201811434160.1A CN201811434160A CN109297844B CN 109297844 B CN109297844 B CN 109297844B CN 201811434160 A CN201811434160 A CN 201811434160A CN 109297844 B CN109297844 B CN 109297844B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/52—Investigating hardness or rebound hardness by measuring extent of rebound of a striking body
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0083—Rebound strike or reflected energy
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Abstract
The invention provides a reinforced concrete structure nondestructive testing device which comprises a device main body, a pushing limiting mechanism and a pushing speed reducing mechanism, wherein the device main body comprises a pressing plate, a supporting plate and a resiliometer, the pressing plate is fixed at the lower side edge of the right end face of the supporting plate, the resiliometer is inserted into a rubber ring I, the pushing limiting mechanism comprises a sliding chute, a rectangular rod, a left limiting plate, a fastening bolt I, a sleeve, a roller I, a rubber ring I, a roller II, a roller III, a right limiting plate, a roller IV and a groove, the pushing speed reducing mechanism comprises a cover plate, an exhaust pipe, a through hole I, a through hole II, a fastening bolt II, a pin rod, a cavity, a cylinder, a rubber ring II, a disc body and a pressure rod, and compared with the prior art, the device has the following beneficial effects: the purpose of pushing the limit is achieved, and the purpose of preventing the rebound tester from being pushed too fast is also achieved.
Description
Technical Field
The invention relates to a nondestructive testing device for a reinforced concrete structure, belonging to the technical field of nondestructive testing.
Background
The reinforced concrete structure is widely applied to basic facilities such as civil use, industry, national defense and the like, and is the most widely used building structure type at present. However, various performance and durability defects are likely to occur due to design, construction, use, disasters, and the like. According to the idea of taking precaution as the main idea, the reinforced concrete structure should be monitored in real time before losing the working performance so as to avoid causing serious engineering accidents and casualties. The resiliometer is the common equipment of reinforced concrete structure nondestructive test, nevertheless bulldozes the resiliometer in-process, and the resiliometer condition of rocking easily appears, is difficult to keep the vertical state with the reinforced concrete structure awaits measuring the face, influences the testing result, bulldozes the resiliometer in-process simultaneously, also has the too fast condition of bulldozing speed, and the bulldozing speed is difficult to control.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a nondestructive testing device for a reinforced concrete structure, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a reinforced concrete structure nondestructive test device, includes device main part, promotes stop gear and promotes reduction gears, the device main part includes clamp plate, extension board and resiliometer, the clamp plate is fixed at extension board right-hand member face downside edge, the resiliometer is inserted in rubber circle one, it includes spout, rectangle pole, left limiting plate, fastening bolt one, sleeve, gyro wheel one, rubber circle one, gyro wheel two, gyro wheel three, right limiting plate and gyro wheel four to promote stop gear, it includes apron, blast pipe, through-hole one, through-hole two, fastening bolt two, cavity, cylinder, rubber circle two, disk body and depression bar to promote reduction gears.
Further, promote among the stop gear, the spout is seted up in extension board up end left side, the sleeve is fixed at the rectangular pole left end, rubber circle one is pasted in the sleeve through glue, fastening bolt one is installed in sleeve annular side left side, the rectangular pole right-hand member passes the spout and extends to the extension board right side, left side limiting plate passes through the bolt and installs at the rectangular pole up end, and left limiting plate setting is in the extension board left side, right side limiting plate passes through the bolt and installs at the rectangular pole right-hand member, roller one is installed at left limiting plate right-hand member terminal surface rear side, roller two is installed at left limiting plate right-hand member terminal surface front side, roller one and roller two all contact with the extension board, roller three is installed at right limiting plate left end surface front side, roller four is installed at right limiting plate left end surface rear side, roller three and roller four all contact with the extension board.
Furthermore, the pushing limiting mechanism also comprises two groups of grooves, the two groups of grooves are symmetrically arranged on the right side of the front end surface of the rectangular rod and the right side of the rear end surface of the rectangular rod, and the two groups of grooves are positioned in the sliding grooves, when the reinforced concrete structure is detected, the support plate is placed on the surface of the reinforced concrete structure, the pressing plate is extruded, so that the support plate is attached to the reinforced concrete structure, then the resiliometer is inserted into the rubber ring I, the fastening bolt I on the sleeve is screwed, then the fastening bolt I fixes the resiliometer in the sleeve by extruding the rubber ring I, the rubber ring plays a role of preventing the fastening bolt I from scratching the resiliometer, then the resiliometer is pushed, so that the rebound rod of the resiliometer is propped against the surface of the reinforced concrete structure to be detected, in-process promoting the extrusion resiliometer, the resiliometer passes through the sleeve and drives the rectangle pole and slide along the spout, the recess is all seted up to both sides because of the rectangle pole is in the spout, so adnexed dust keeps in the recess at the rectangle pole slip in-process on the spout inner wall, reduce adnexed dust on the spout inner wall and to the gliding influence of rectangle pole, the rectangle pole when sliding in the spout, left side limiting plate and right limiting plate are along with the rectangle pole together removes, and then left side limiting plate drives gyro wheel one and gyro wheel two rolls along extension board left end face, right side limiting plate drives gyro wheel three and gyro wheel four and rolls along extension board right end face, and then left side limiting plate and right limiting plate play spacing not influence the slip of rectangle pole when playing, reach spacing purpose, avoid appearing rocking the condition influence testing result pressing the resiliometer in-process.
Further, two sets of are all installed to gyro wheel one, gyro wheel two, gyro wheel three and gyro wheel four the gyro wheel one is all installed at left limiting plate right-hand member face rear side, and is two sets of gyro wheel two is all installed at left limiting plate right-hand member face front side, and is two sets of gyro wheel three is all installed at right limiting plate left end face front side, and is two sets of gyro wheel four is all installed at right limiting plate left end face rear side, through the design of two sets of gyro wheels one, gyro wheel two, gyro wheel three and gyro wheel four, improves the stability that left limiting plate and right limiting plate removed.
Further, among the promotion reduction gears, the cavity is seted up at extension board left end face downside, the apron passes through the mounting screw in the inside left side of cavity, the cylinder passes through the bolt and installs at cavity inside lower terminal surface, the blast pipe is installed at cylinder lower extreme surface, and the blast pipe left end passes the apron and extends to the extension board left side, through-hole one and through-hole two are all seted up at blast pipe annular side front side, through-hole one sets up in two left sides of through-hole, fastening bolt two is installed at blast pipe left end surface upside, the disk body is installed in the cylinder body, rubber circle two is crossed the glue and is pasted on disk body annular side, the depression bar lower extreme is installed at disk body up end intermediate position, and the depression bar upper end extends to in the spout.
The push decelerating mechanism further comprises a pin rod, the pin rod is inserted into the exhaust pipe, the diameter of the first through hole is larger than that of the second through hole, the pin rod is drawn out of the exhaust pipe before the resiliometer is pushed, then the pressure rod is pulled, the pressure rod drives the rubber ring II to slide along the cylinder through the disc until the rubber ring II moves to the upper side inside the cylinder, then the pin rod is inserted into the exhaust pipe again, the pin rod blocks the first through hole, then the fastening bolt II is screwed, the pin rod is fixed in the exhaust pipe under the action of the fastening bolt II, then the rectangular rod slides in the sliding groove and extrudes the pressure rod, the pressure rod drives the rubber ring II to reversely slide in the cylinder through the disc, the rubber ring II and the disc jointly extrude gas in the cylinder, then the gas in the cylinder flows into the exhaust pipe, then the gas is exhausted through the second through hole, the gas in the cylinder is low in outflow speed due to the fact that the diameter of the second through hole is small, the purpose of slowing down the rectangular sliding speed of the rectangular rod is achieved, when the sliding speed of the rectangular rod needs to be increased, the position of the pin rod in the exhaust pipe is adjusted, the through hole is also in a state, the through-hole is further, the through-hole is not blocked, the through-hole, the rectangular rod is pushed, the purpose of the rectangular rod is achieved, and the purpose of adjusting speed of the rectangular rod is finally, the rectangular rod is adjusted, and the resiliometer is achieved, and the purpose of adjusting speed is achieved, and the rectangular rod is achieved, and the purpose of adjusting is achieved.
Furthermore, a round hole is formed in the upper end face in the cavity, the upper end of the pressing rod penetrates through the round hole and extends into the sliding groove, and the round hole is formed in the upper end face in the cavity, so that the effect of communicating the sliding groove with the cavity is achieved, and the movement of the pressing rod is facilitated.
Furthermore, the outer surface of the lower end of the pressing rod is provided with an external thread, a thread blind hole is formed in the middle of the upper end face of the tray body, the lower end of the pressing rod is meshed in the thread blind hole through the external thread, and the pressing rod is meshed in the thread blind hole through the external thread, so that when the pressing rod is damaged, convenient replacement is realized.
The invention has the beneficial effects that: according to the nondestructive testing device for the reinforced concrete structure, the sliding groove, the rectangular rod, the left limiting plate, the first fastening bolt, the sleeve, the first roller, the first rubber ring, the second roller, the third roller, the right limiting plate, the fourth roller and the groove are added, so that the purpose of pushing limiting is achieved, and the stability of pushing the resiliometer is improved.
Because the cover plate, the exhaust pipe, the first through hole, the second fastening bolt, the pin rod, the cavity, the cylinder, the second rubber ring, the disc body and the pressure rod are added, the design realizes the purpose of preventing the rebound tester from being pushed too fast.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural view of a nondestructive testing apparatus for a reinforced concrete structure according to the present invention;
FIG. 2 is a top view of a pushing and limiting mechanism in the nondestructive testing device for a reinforced concrete structure according to the present invention;
FIG. 3 is a perspective view of a right limiting plate in the nondestructive testing device for a reinforced concrete structure according to the present invention;
FIG. 4 is a perspective view of a rectangular bar in the nondestructive testing apparatus for a reinforced concrete structure according to the present invention;
FIG. 5 is an enlarged view of the point A in the nondestructive testing device for a reinforced concrete structure of the present invention;
FIG. 6 is a schematic view showing the assembly of a pin rod and an exhaust pipe in the nondestructive testing apparatus for a reinforced concrete structure according to the present invention;
FIG. 7 is a schematic structural view of a pushing deceleration mechanism in the nondestructive testing device for a reinforced concrete structure according to the present invention;
in the figure: 1-pressing plate, 2-supporting plate, 3-sliding groove, 4-rectangular rod, 5-left limiting plate, 6-resiliometer, 7-fastening bolt I, 8-sleeve, 9-cover plate, 10-roller I, 11-rubber ring I, 12-roller II, 13-roller III, 14-right limiting plate, 15-roller IV, 16-groove, 17-exhaust pipe, 18-through hole I, 19-through hole II, 20-fastening bolt II, 21-pin rod, 22-cavity, 23-cylinder, 24-rubber ring II, 25-disc body and 26-pressing rod.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides a reinforced concrete structure nondestructive test device, the device comprises a device main body, promote stop gear and promote reduction gears, the device main body includes clamp plate 1, extension board 2 and resiliometer 6, clamp plate 1 is fixed in extension board 2 right-hand member face downside edge, resiliometer 6 assigns and inserts in rubber circle 11, it includes spout 3 to promote stop gear, rectangular rod 4, left limiting plate 5, fastening bolt 7, sleeve 8, gyro wheel 10, rubber circle 11, gyro wheel two 12, gyro wheel three 13, right limiting plate 14 and gyro wheel four 15, it includes apron 9 to promote reduction gears, blast pipe 17, through-hole 18, through-hole two 19, fastening bolt two 20, cavity 22, cylinder 23, rubber circle two 24, disk body 25 and depression bar 26.
In promoting stop gear, spout 3 sets up in extension board 2 up end left side, sleeve 8 is fixed at 4 left ends of rectangle pole, rubber circle 11 pastes in sleeve 8 through glue, fastening bolt 7 is installed in 8 annular side left sides of sleeve, 4 right-hand members of rectangle pole pass spout 3 and extend to extension board 2 right side, left side limiting plate 5 passes through the bolt and installs at 4 up end of rectangle pole, and left limiting plate 5 sets up in extension board 2 left side, right limiting plate 14 passes through the bolt and installs at 4 right-hand members of rectangle pole, gyro wheel 10 is installed at 5 right-hand member face rear sides of left limiting plate, gyro wheel two 12 is installed at 5 right-hand member face front sides of left limiting plate, gyro wheel one 10 and gyro wheel two 12 all contact with extension board 2, gyro wheel three 13 is installed at 14 left end face front sides of right limiting plate, gyro wheel four 15 is installed at 14 left end face rear sides of right limiting plate, gyro wheel three 13 and gyro wheel four 15 all contact with extension board 2.
In the promotion reduction gears, cavity 22 is seted up in 2 left end face downside of extension board, apron 9 passes through the screw installation in the inside left side of cavity 22, cylinder 23 passes through the bolt and installs the inside terminal surface down in cavity 22, exhaust pipe 17 is installed at cylinder 23 lower extreme surface, and exhaust pipe 17 left end passes apron 9 and extends to the extension board 2 left side, through-hole 18 and through-hole two 19 are all seted up in exhaust pipe 17 annular side front side, through-hole 18 sets up in through-hole two 19 left sides, fastening bolt two 20 are installed at exhaust pipe 17 left end surface upside, disk body 25 is installed in cylinder 23, rubber circle two 24 is pasted on disk body 25 annular side through glue, the lower extreme of depression bar 26 is installed in disk body 25 up end intermediate position, and the depression bar 26 upper end extends to in spout 3.
As an embodiment of the present invention: in promoting stop gear, still include recess 16, two sets have been seted up to recess 16, two sets of recess 16 symmetry are seted up on rectangle pole 4 preceding terminal surface right side and rectangle pole 4 rear end face right side, and two sets of recess 16 all are in spout 3, when detecting reinforced concrete structure, place extension board 2 on the surface of reinforced concrete structure, and extrude clamp plate 1, extension board 2 laminates with reinforced concrete structure mutually, insert resiliometer 6 in rubber circle 11 afterwards, twist fastening bolt one 7 on the sleeve 8, then fastening bolt one 7 fixes resiliometer 6 in sleeve 8 through extrusion rubber circle 11, rubber circle 11 plays the effect of preventing fastening bolt one 7 fish tail resiliometer 6, then promote resiliometer 6, make the bounce pole that hits of resiliometer 6 withstand the face that awaits measuring of reinforced concrete structure, in the in-process of promoting extrusion resiliometer 6, resiliometer 6 drives rectangle pole 4 through sleeve 8 and slides along spout 3, because of rectangle pole 4 both sides in spout 3 all set up recess 16, so that dust on the inner wall of spout 3 reaches the limit board 4 and the influence the limit board that the dust roll when extension board 4 and the limit board 4 roll the limit board 14 and the gyro wheel and the limit board 4 and the gyro wheel 4 and move along the left side, it influences the limit board 14 to press the limit board that the limit board 14 to the rolling effect that the left side and roll the limit board 4 and the left side and roll the limit board in the gyro wheel 3 simultaneously, it affects the limit board 14 to the limit board 4 and roll the limit board 14 to reduce the limit board and roll the limit board 4 and roll the limit board in the limit board 4 and the influence the limit board of the gyro wheel 14.
As an embodiment of the present invention: the gyro wheel is one 10, two 12, two sets of are all installed to three 13 of gyro wheel and four 15 of gyro wheel, two sets of gyro wheel 10 are all installed in 5 right-hand member face rear sides of left limiting plate, two sets of gyro wheel 12 are all installed in 5 right-hand member face front sides of left limiting plate, two sets of gyro wheel three 13 are all installed in 14 left-hand member face front sides of right limiting plate, two sets of gyro wheel four 15 are all installed in 14 left-hand member face rear sides of right limiting plate, through two sets of gyro wheel one 10, two 12 of gyro wheel, three 13 of gyro wheel and four 15's of gyro wheel design, improve the stability that left limiting plate 5 and right limiting plate 14 removed.
As an embodiment of the present invention: in the pushing speed reducing mechanism, the pin rod 21 is further included, the pin rod 21 is inserted into the exhaust pipe 17, the diameter of the first through hole 18 is larger than that of the second through hole 19, before the resiliometer 6 is pushed, the pin rod 21 is pulled out of the exhaust pipe 17, then the pressure rod 26 is pulled, then the pressure rod 26 drives the rubber ring 24 to slide along the cylinder 23 through the disc 25 until the rubber ring 24 moves to the upper side inside the cylinder 23, then the pin rod 21 is inserted into the exhaust pipe 17 again, the pin rod 21 blocks the first through hole 18, then the fastening bolt 20 is screwed, under the action of the fastening bolt 20, the pin rod 21 is fixed in the exhaust pipe 17, and then when the rectangular rod 4 slides in the sliding groove 3 and presses the pressure rod 26, the pressure rod 26 drives the rubber ring 24 to slide in the cylinder 23 in the reverse direction through the disc 25, then the rubber ring 24 and the disc 25 jointly press the gas in the cylinder 23, then the gas in the exhaust pipe 23 flows into the exhaust pipe 17 and is discharged through the second through the through hole 19, and therefore, as the diameter of the cylinder 23 is smaller, the gas in the cylinder 23 is adjusted at a slower speed, and the speed of the gas in the cylinder 4 is reduced, and the cylinder 18 is adjusted, and the gas in the cylinder 18 is finally, when the rebound regulator is pushed, and the cylinder 6, and the cylinder 18 is adjusted.
As an embodiment of the present invention: the round hole is seted up to the inside up end of cavity 22, and the depression bar 26 upper end passes in the round hole extends to spout 3, sets up the round hole at the inside up end of cavity 22, plays the effect of intercommunication spout 3 and cavity 22, the removal of the depression bar 26 of being convenient for.
As an embodiment of the present invention: the outer surface of the lower end of the compression rod 26 is provided with an external thread, the middle position of the upper end face of the disc body 25 is provided with a threaded blind hole, the lower end of the compression rod 26 is meshed in the threaded blind hole through the external thread, and the compression rod 26 is meshed in the threaded blind hole through the external thread, so that convenient replacement is realized when the compression rod 26 is damaged.
While there have been shown and described what are at present considered to be the basic principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (4)
1. The utility model provides a reinforced concrete structure nondestructive test device, includes the device main part, promotes stop gear and promotes reduction gears, its characterized in that: the device main body comprises a pressing plate, a supporting plate and a resiliometer, the pressing plate is fixed at the edge of the lower side of the right end face of the supporting plate, the resiliometer is inserted into a rubber ring I, the pushing limiting mechanism comprises a sliding chute, a rectangular rod, a left limiting plate, a fastening bolt I, a sleeve, a roller I, a rubber ring I, a roller II, a roller III, a right limiting plate and a roller IV, and the pushing reducing mechanism comprises a cover plate, an exhaust pipe, a through hole I, a through hole II, a fastening bolt II, a cavity, a cylinder, a rubber ring II, a disc body and a pressing rod;
in the pushing limiting mechanism, the sliding groove is formed in the left side of the upper end face of the support plate, the sleeve is fixed at the left end of the rectangular rod, the rubber ring I is pasted in the sleeve through glue, the fastening bolt I is installed on the left side of the annular side face of the sleeve, the right end of the rectangular rod penetrates through the sliding groove and extends to the right side of the support plate, the left limiting plate is installed on the upper end face of the rectangular rod through a bolt, the left limiting plate is arranged on the left side of the support plate, the right limiting plate is installed on the right end face of the rectangular rod through a bolt, the roller I is installed on the rear side of the right end face of the left limiting plate, the roller II is installed on the front side of the right end face of the left limiting plate, the roller I and the roller II are both in contact with the support plate, the roller III is installed on the front side of the left end face of the right limiting plate, the roller IV is installed on the rear side of the left end face of the right limiting plate, and the roller III and the roller IV are both in contact with the support plate;
the pushing limiting mechanism further comprises two groups of grooves, the two groups of grooves are symmetrically formed in the right side of the front end face of the rectangular rod and the right side of the rear end face of the rectangular rod, and the two groups of grooves are located in the sliding grooves;
in the pushing speed reducing mechanism, the cavity is formed in the lower side of the left end face of the support plate, the cover plate is mounted on the left side in the cavity through screws, the cylinder is mounted on the lower end face of the inner portion of the cavity through bolts, the exhaust pipe is mounted on the outer surface of the lower end of the cylinder, the left end of the exhaust pipe penetrates through the cover plate and extends to the left side of the support plate, the first through hole and the second through hole are formed in the front side of the annular side face of the exhaust pipe, the first through hole is formed in the left side of the second through hole, the second fastening bolt is mounted on the upper side of the outer surface of the left end of the exhaust pipe, the disk body is mounted in the cylinder, the second rubber ring is adhered to the annular side face of the disk body through glue, the lower end of the pressure rod is mounted in the middle of the upper end face of the disk body, and the upper end of the pressure rod extends into the sliding groove;
the pushing speed reducing mechanism further comprises a pin rod, the pin rod is inserted into the exhaust pipe, and the diameter of the first through hole is larger than that of the second through hole.
2. The nondestructive inspection apparatus for a reinforced concrete structure as recited in claim 1, wherein: two sets of, two sets of are all installed to gyro wheel one, gyro wheel two, gyro wheel three and gyro wheel four the gyro wheel one is all installed at left limiting plate right-hand member face rear side, and is two sets of gyro wheel two is all installed in left limiting plate right-hand member face front side, and is two sets of gyro wheel three is all installed in right limiting plate left end face front side, and is two sets of gyro wheel four is all installed in right limiting plate left end face rear side, through the design of two sets of gyro wheels one, gyro wheel two, gyro wheel three and gyro wheel four, improves the stability that left limiting plate and right limiting plate removed.
3. The nondestructive inspection device for a reinforced concrete structure of claim 2, wherein: the cavity is internally provided with a round hole at the upper end face, the upper end of the pressure rod penetrates through the round hole and extends into the chute, and the round hole is formed at the upper end face inside the cavity, so that the effect of communicating the chute with the cavity is achieved, and the movement of the pressure rod is convenient.
4. The nondestructive inspection apparatus for a reinforced concrete structure as recited in claim 3, wherein: the outer surface of the lower end of the pressing rod is provided with an external thread, the middle position of the upper end face of the tray body is provided with a threaded blind hole, the lower end of the pressing rod is meshed in the threaded blind hole through the external thread, and the pressing rod is meshed in the threaded blind hole through the external thread, so that when the pressing rod is damaged, convenient replacement is realized.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811434160.1A CN109297844B (en) | 2018-11-28 | 2018-11-28 | Nondestructive testing device for reinforced concrete structure |
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| CN201811434160.1A CN109297844B (en) | 2018-11-28 | 2018-11-28 | Nondestructive testing device for reinforced concrete structure |
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| CN109297844A CN109297844A (en) | 2019-02-01 |
| CN109297844B true CN109297844B (en) | 2023-03-21 |
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| CN112113870A (en) * | 2020-09-09 | 2020-12-22 | 廊坊市阳光建设工程质量检测有限公司 | Method for detecting strength of concrete pouring top surface by using in-situ secondary rebound method |
| CN112902800B (en) * | 2021-01-20 | 2022-09-23 | 宁夏筑之信检测有限公司 | Steel bar diameter measuring device |
| CN112917451A (en) * | 2021-01-28 | 2021-06-08 | 谭英 | Point mark device on electric motor rotor production line |
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