CN112033734A - High-precision in-service concrete strength rapid detection equipment - Google Patents
High-precision in-service concrete strength rapid detection equipment Download PDFInfo
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- CN112033734A CN112033734A CN202010972428.8A CN202010972428A CN112033734A CN 112033734 A CN112033734 A CN 112033734A CN 202010972428 A CN202010972428 A CN 202010972428A CN 112033734 A CN112033734 A CN 112033734A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses high-precision in-service concrete strength rapid detection equipment, which relates to the technical field of concrete strength detection and comprises a base, a slurry supplementing tank, a height adjusting seat and a base, wherein the slurry supplementing tank and the height adjusting seat are both fixed on the base; a rotating motor is fixed in the base, a rotating arm is fixed at the output end of the rotating motor, a follow-up arm is hinged to the other end of the rotating arm, the angle of the follow-up arm can be adjusted, and a coring assembly is arranged on the follow-up arm; get the core subassembly and can get the core to the concrete of labour in, make level the processing to the upper and lower surface of the stem of taking out, wherein, get the core subassembly and can polish to the stem terminal surface that exposes in the outside and mend thick liquid and make level the processing, and make level the processing to hiding cutting in inside stem terminal surface.
Description
Technical Field
The invention relates to the technical field of concrete strength detection, in particular to high-precision in-service concrete strength rapid detection equipment.
Background
The core column detection method has the advantages that the important significance is achieved for the detection of the in-service concrete, potential hidden dangers of the in-service concrete can be found, accidents are avoided from the source, the existing detection method for the concrete comprises a rebound method, an ultrasonic method, a core drilling method and the like, the core drilling method needs to conduct coring processing on the in-service concrete, and strength detection can be conducted by using a core column detector after the core column is taken out.
Therefore, there is a need to provide a high-precision in-service concrete strength rapid detection device to solve the above problems in the background art.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: a high-precision in-service concrete strength rapid detection device comprises a base, a slurry supplementing tank, a height adjusting seat and a base, wherein the slurry supplementing tank and the height adjusting seat are both fixed on the base;
a rotating motor is fixed in the base, a rotating arm is fixed at the output end of the rotating motor, a follow-up arm is hinged to the other end of the rotating arm, the angle of the follow-up arm can be adjusted, and a coring assembly is arranged on the follow-up arm;
get the core subassembly and can get the core to the concrete of labour in, make level the processing to the upper and lower surface of the stem of taking out, wherein, get the core subassembly and can polish to the stem terminal surface that exposes in the outside and mend thick liquid and make level the processing, and make level the processing to hiding cutting in inside stem terminal surface.
Further, preferably, a telescopic adjusting cylinder is hinged to the middle of the rotating arm, and the other end of the telescopic adjusting cylinder is hinged to the middle of the follow-up arm, so that the follow-up arm is driven to perform angle adjustment around the rotating arm through the telescopic adjustment of the telescopic adjusting cylinder, and the follow-up arm can adapt to in-service concrete at different positions.
Further, as preferred, it includes pivot, connection pad, a core section of thick bamboo and core bit to get the core subassembly, wherein, the connection pad coaxial fixation is in the one end of pivot, the pivot is rotated by fixing the core motor drive on the trailing arm, the coaxial fixed cover in outside of connection pad is equipped with a core section of thick bamboo, the other end of a core section of thick bamboo adopts the coaxial fixed core bit that has of ring seat.
Preferably, a separation blade is fitted into the ring seat so as to be extendable and retractable in a radial direction of the core barrel, and the separation blade is extendable to a position of a central axis of the core barrel.
Further, preferably, a leveling polishing disc is coaxially attached to one end, far away from the rotating shaft, of the connecting disc;
the leveling and polishing disc comprises a disc body, the disc body is of a cavity structure, a plurality of slurry supplementing holes are formed in the upper surface and the lower surface of the disc body, and the slurry supplementing holes are distributed in a plurality of groups of circumferential arrays;
and a plurality of groups of sparse holes are uniformly distributed on the connecting disc.
Further, as preferred, the slurry supplementing and leveling device further comprises a slurry supplementing and leveling assembly, wherein the slurry supplementing and leveling assembly comprises a slurry supplementing seat, a sealing ring seat, a fine grinding sleeve and a guide cylinder, the slurry supplementing seat is fixedly embedded in the mounting seat, a slurry supplementing opening is formed in one side of the slurry supplementing seat, the slurry supplementing opening is connected with a slurry supplementing tank through a hose, and the top of the slurry supplementing seat is inwards sunken to form a limiting cylinder capable of passing through a rotating shaft;
mend the bottom embedding of thick liquid seat and have the guide cylinder of fixing in the mount pad, the through-hole has been seted up in the middle part of guide cylinder for through the pivot, and open in the through-hole and be equipped with annular fine grinding space, be provided with the fine grinding cover of fixed cover outside the pivot in the fine grinding space, and the thick liquid after the fine grinding filtration can fall into on the connection pad through the thick liquid passageway, realizes making level to the benefit thick liquid of stem terminal surface.
Further, as preferred, the coaxial connecting cylinder that is fixed with in below of guide cylinder, the coaxial water conservancy diversion seat that is fixed with in below of connecting cylinder, the water conservancy diversion seat can wrap up in the outside of coring section of thick bamboo, and rotates with coring section of thick bamboo through wear-resisting cover and link to each other, leave the clearance between the interior top of water conservancy diversion seat and the connection pad to constitute the water conservancy diversion space.
Further, preferably, two groups of telescopic rods are fixedly and symmetrically embedded in the follow-up arm, and telescopic ends of the telescopic rods are fixedly connected with the mounting seat;
a sealing ring seat is fixed on the inner wall of the limiting cylinder, an annular limiting groove is formed in the inner wall of the sealing ring seat, and a limiting ring table coaxially fixed outside the rotating shaft is arranged in the annular limiting groove in a limiting and rotating manner;
the one end that the thick liquid seat was stretched out to the pivot is still circumference array has the spacing slider that the multiunit extends along the axis of pivot, spacing slider slides and sets up in the spacing groove that corresponds the seting up on the actuating lever to can utilize the actuating lever to drive the pivot and rotate, and drive the pivot through the telescopic link and slide along the axial of actuating lever, the actuating lever links to each other with the output end of coring motor is fixed.
Further, as preferred, the bottom of disk body has evenly laid the mill, the mill sets up with the benefit thick liquid hole interval of disk body bottom, still evenly laid multiunit choked flow pad on the outer circumference of bottom of disk body, the thickness of choked flow pad is unanimous with the thickness of mill.
Further, preferably, a plurality of groups of resistance-increasing rods are fixed on the follower arm and close to one side of the coring assembly in a circumferential array.
Compared with the prior art, the invention provides high-precision in-service concrete strength rapid detection equipment, which has the following beneficial effects:
in the device, the coring component can adapt to various positions of in-service concrete by adjusting the height of the base, the rotating angle of the rotating arm and the rotating angle of the follower arm, is convenient for coring treatment, improves the coring speed, in addition, the end surface of the core column on one side exposed in the air for a long time is in an uneven state, the leveling and polishing disc can be used for polishing and leveling, and slurry can be used for supplementing and leveling in a place with a deeper pit, thereby realizing the fast construction of a qualified core column, and the other end surface of the core column is cut and polished by a separating knife, thereby conveniently and rapidly realizing coring treatment, and the core column taken out can be directly used for detection, the detection speed and the detection precision are improved, in addition, the length, inner diameter, and position of the leveling sanding disc of the coring barrel may limit the size of the core column, thereby directly constructing a standard core column during coring.
Drawings
FIG. 1 is a schematic diagram of an overall structure of a high-precision in-service concrete strength rapid detection device;
FIG. 2 is a schematic structural diagram of a core assembly in a high-precision rapid in-service concrete strength detection device;
FIG. 3 is a partially enlarged schematic view of FIG. 2;
FIG. 4 is a schematic structural diagram of a leveling polishing disc in a high-precision in-service concrete strength rapid detection device;
in the figure: 1. a base; 2. a pulp replenishing tank; 3. a height adjusting seat; 4. a screw-nut pair; 5. a base; 6. a rotating arm; 7. a telescopic adjusting cylinder; 8. a follower arm; 9. a coring assembly; 10. a coring motor; 11. a resistance increasing rod; 12. a drive shaft; 121. a limiting groove; 13. a telescopic rod; 91. a rotating shaft; 92. a mounting seat; 93. a slurry supplementing and leveling assembly; 94. a connecting disc; 95. a flow guide seat; 96. a core taking barrel; 97. a ring seat; 98. a coring bit; 99. a separating knife; 910. leveling a polishing disc; 911. a limiting slide block; 931. a pulp replenishing seat; 932. a limiting cylinder; 933. a seal ring seat; 934. finely grinding the sleeve; 935. a guide cylinder; 936. a slurry channel; 937. a connecting cylinder; 9101. a tray body; 9102. slurry supplementing holes; 9103. grinding disc; 9104. a choke pad.
Detailed Description
Referring to fig. 1 to 4, in an embodiment of the present invention, a high-precision in-service concrete strength rapid detection apparatus includes a base 1, a slurry supplement tank 2, a height adjustment seat 3, and a base 5, wherein the slurry supplement tank 2 and the height adjustment seat 3 are both fixed on the base 1, the height adjustment seat 3 is further connected to the base 5 through a screw-nut pair 4 capable of being adjusted up and down, the screw-nut pair has an existing structure, which is not described herein again, the base 1 is further provided with a core column detector capable of detecting the strength of a core column, in order to improve the detection speed and precision, coring processing needs to be performed on in-service concrete rapidly and leveling both end faces of the core column taken out, so that the core column meets the detection standard, and in addition, when coring, a part of the structure or a component in-service concrete with a smaller stress is selected, Representative portions of the concrete strength quality and portions that facilitate operation of the coring assembly;
a rotating motor is fixed in the base 5, a rotating arm 6 is fixed at the output end of the rotating motor, a follower arm 8 is hinged to the other end of the rotating arm 6, the angle of the follower arm 8 can be adjusted, and a coring assembly 9 is arranged on the follower arm 8;
get core subassembly 9 and can get core in labour concrete, make level the processing to the upper and lower surface of the stem of taking out, wherein, get core subassembly 9 and can polish to the stem terminal surface that exposes in the outside and mend thick liquid and make level the processing, and make level the processing to hiding cutting in inside stem terminal surface to convenient and fast's realization is got core and is handled, and the stem of taking out can directly be used for detecting, has improved detection speed.
In this embodiment, as shown in fig. 1, a telescopic adjusting cylinder 7 is hinged to the middle of the rotating arm 6, and the other end of the telescopic adjusting cylinder 7 is hinged to the middle of the follower arm 8, so that the follower arm 8 is driven to perform angle adjustment around the rotating arm 6 by the telescopic adjusting cylinder 7, thereby achieving rapid adjustment to adapt to in-service concrete at different positions.
In this embodiment, the coring assembly 9 includes a rotating shaft 91, a connecting disc 94, a coring barrel 96 and a coring bit 98, wherein the connecting disc 94 is coaxially fixed at one end of the rotating shaft 91, the rotating shaft 91 is driven by a coring motor 10 fixed on the follower arm 8 to rotate, the outer coaxial fixing sleeve of the connecting disc 94 is provided with the coring barrel 96, and the other end of the coring barrel 96 adopts a ring seat 97 to be coaxially fixed with the coring bit 98.
As a preferred embodiment, as shown in fig. 2, a separating knife 99 capable of extending and retracting along the radial direction of the core barrel 96 is embedded in the ring seat 97, and the separating knife 99 can extend to the central axis position of the core barrel, specifically, the separating knife includes a knife body and a telescopic driving member, and the knife body is driven by the telescopic driving member to extend and retract so as to extend to the central axis position of the core barrel, so that the core barrel is separated, and one side end face of the core barrel is cut and polished at the same time.
In this embodiment, as shown in fig. 3 and 4, a leveling polishing disc 910 is coaxially attached to one end of the connecting disc 94 away from the rotating shaft 91;
the leveling polishing disc 910 comprises a disc body 9101, the disc body 9101 is of a cavity structure, a plurality of slurry supplementing holes 9102 are formed in the upper surface and the lower surface of the disc body 9101, and the slurry supplementing holes 9102 are distributed in a plurality of groups of circumferential arrays;
and a plurality of groups of sparse holes are uniformly distributed on the connecting disc 94.
In addition, in this embodiment, the slurry supplementing and leveling assembly 93 is further included, the slurry supplementing and leveling assembly 93 includes a slurry supplementing seat 931, a sealing ring seat 933, a fine grinding sleeve 934 and a guide cylinder 935, wherein the slurry supplementing seat 931 is fixedly embedded in the mounting seat 92, a slurry supplementing port is arranged on one side of the slurry supplementing seat 931, the slurry supplementing port is connected with the slurry supplementing tank 2 through a hose, the slurry supplementing tank 2 can be used for conveying slurry through the hose, the slurry can be polymer cement mortar or epoxy cement mortar, an accelerator needs to be mixed into the slurry, and the top of the slurry supplementing seat 931 is recessed inwards to form a limiting cylinder 932 capable of passing through the rotating shaft 91;
mend the bottom embedding of thick liquid seat 931 has the guide cylinder 935 of fixing in mount pad 92, the through-hole has been run through at the middle part of guide cylinder 935 for through pivot 91, and seted up annular fine grinding space in the through-hole, be provided with fixed cover in the fine grinding space and establish the fine grinding cover 934 at the outer circumference of pivot 91, and the thick liquid after the fine grinding filtration can fall into on connection pad 94 through thick liquid passageway 936, realize making level to the benefit thick liquid of stem terminal surface, when concrete implementation, expose a side stem terminal surface in the air for a long time, present unevenness's state, utilize the mill 910 of making level, can polish and make level, and in the darker place of pit, still can utilize the thick liquid to mend thick liquid and make level, thereby realize constructing qualified stem fast, and another terminal surface of stem is then cut by the separation sword and is polished.
In this embodiment, a connecting cylinder 937 is coaxially fixed below the guiding cylinder 935, a flow guide seat 95 is coaxially fixed below the connecting cylinder 973, the flow guide seat 95 can be wrapped outside the coring cylinder 96 and is rotatably connected with the coring cylinder 96 through a wear-resistant sleeve, and a gap is left between the inner top of the flow guide seat 95 and the connecting plate 94, so that a flow guide space is formed and slurry is prevented from overflowing.
In this embodiment, two sets of telescopic rods 13 are further fixed and symmetrically embedded in the follower arm 8, and the telescopic ends of the telescopic rods 13 are fixedly connected with the mounting seat 92;
a sealing ring seat 33 is fixed on the inner wall of the limiting cylinder 932, an annular limiting groove is formed in the inner wall of the sealing ring seat 33, and a limiting ring table coaxially fixed outside the rotating shaft 91 is arranged in the annular limiting groove in a limiting and rotating manner;
the one end that thick liquid seat 931 was mended in the extension of pivot 91 still circumference array has the spacing slider 911 that the multiunit extends along the axis of pivot 91, spacing slider 911 slides and sets up in the spacing groove 121 that corresponds the seting up on actuating lever 12 to can utilize actuating lever 12 to drive pivot 91 and rotate, and drive pivot 91 through telescopic link 13 and slide along the axial of actuating lever 12, actuating lever 12 is fixed continuous with the output end of coring motor 10.
As a preferred embodiment, as shown in fig. 4, the bottom of the disc body 9101 is uniformly provided with a polishing disc 9103, the polishing disc 9103 and the slurry supplementing holes 9102 at the bottom of the disc body 9102 are arranged at intervals, the outer circumference of the bottom of the disc body 9102 is also uniformly provided with a plurality of groups of flow-resisting pads 9104, and the flow-resisting pads 9104 are consistent with the polishing disc 9103 in thickness.
In a preferred embodiment, as shown in fig. 1, a plurality of sets of resistance-increasing rods 11 are fixed on the follower arm 8 and close to one side of the coring assembly 9 in a circumferential array, and the contact positions of the resistance-increasing rods 11 and the in-service concrete are made of rubber.
When concrete implementation, select the in-service concrete of suitable position to get the core, wherein the height through adjustment base 5, the rotation angle of rotor arm 6 and trailing arm 8's turned angle can make and get the position that core subassembly 9 adapts to at in-service concrete, when getting the core, start coring motor 10, it rotates to drive coring bit 98, the realization is bored and is got, expose one side stem terminal surface in the air for a long time, present unevenness's state, utilize the make level and beat mill 910, can polish and make level, and in the darker place of pit, still can utilize the thick liquid to mend the thick liquid and make level, thereby realize constructing qualified stem fast, and another terminal surface of stem is then cut by the separation sword and is polished, utilize the stem detector on the base 1 to carry out intensity detection after taking out the stem.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (10)
1. A high-precision in-service concrete strength rapid detection device comprises a base (1), a slurry supplementing tank (2), a height adjusting seat (3) and a base (5), wherein the slurry supplementing tank (2) and the height adjusting seat (3) are both fixed on the base (1), the height adjusting seat (3) is also connected with the base (5) in a manner that a screw-nut pair (4) can be adjusted up and down, and a core column detector is further arranged on the base (1);
the method is characterized in that: a rotating motor is fixed in the base (5), a rotating arm (6) is fixed at the output end of the rotating motor, a follow-up arm (8) is hinged to the other end of the rotating arm (6) in an angle-adjustable manner, and a coring assembly (9) is arranged on the follow-up arm (8);
coring subassembly (9) can be to when the concrete of using a labour coring, make level the processing to the upper and lower surface of the stem of taking out, wherein, coring subassembly (9) can be polished to the stem terminal surface that exposes to the outside and mend the thick liquid processing of making level, and make level the processing to hiding cutting in the stem terminal surface of inside.
2. The high-precision in-service concrete strength rapid detection equipment according to claim 1, characterized in that: the middle part of the rotating arm (6) is hinged with a telescopic adjusting cylinder (7), the other end of the telescopic adjusting cylinder (7) is hinged with the middle part of the follow-up arm (8), so that the follow-up arm (8) is driven to carry out angle adjustment around the rotating arm (6) through the telescopic adjustment of the telescopic adjusting cylinder (7) to adapt to in-service concrete at different positions.
3. The high-precision in-service concrete strength rapid detection equipment according to claim 1, characterized in that: coring subassembly (9) is including pivot (91), connection pad (94), a core section of thick bamboo (96) and core bit (98), wherein, connection pad (94) coaxial fixation is in the one end of pivot (91), pivot (91) are driven by fixing coring motor (10) on trailing arm (8) and are rotated, the coaxial fixed cover in outside of connection pad (94) is equipped with a core section of thick bamboo (96), the other end of a core section of thick bamboo (96) adopts ring seat (97) coaxial fixed with core bit (98).
4. The high-precision in-service concrete strength rapid detection equipment according to claim 3, characterized in that: a separation knife (99) which can extend and contract along the radial direction of the core barrel (96) is embedded in the ring seat (97), and the separation knife (99) can extend to the central axis position of the core barrel.
5. The high-precision in-service concrete strength rapid detection equipment according to claim 3, characterized in that: a leveling polishing disc (910) is coaxially attached to one end, far away from the rotating shaft (91), of the connecting disc (94);
the leveling polishing disc (910) comprises a disc body (9101), the disc body (9101) is of a cavity structure, a plurality of slurry supplementing holes (9102) are formed in the upper surface and the lower surface of the disc body, and the slurry supplementing holes (9102) are arranged in a plurality of groups of circumferential arrays;
and a plurality of groups of sparse holes are uniformly distributed on the connecting disc (94).
6. The high-precision in-service concrete strength rapid detection equipment according to claim 3, characterized in that: the mortar supplementing and leveling assembly (93) comprises a mortar supplementing seat (931), a sealing ring seat (933), a fine grinding sleeve (934) and a guide cylinder (935), wherein the mortar supplementing seat (931) is fixedly embedded in the mounting seat (92), a mortar supplementing port is formed in one side of the mortar supplementing seat (931), the mortar supplementing port is connected with the mortar supplementing tank (2) through a hose, and the top of the mortar supplementing seat (931) is inwards sunken to form a limiting cylinder (932) capable of passing through a rotating shaft (91);
mend the bottom embedding of thick liquid seat (931) have guide cylinder (935) of fixing in mount pad (92), the through-hole has been seted up in the middle part of guide cylinder (935) for through pivot (91), and open in the through-hole and be equipped with annular fine grinding space, be provided with fixed cover in the fine grinding space and establish fine grinding cover (934) in pivot (91) outer circumference, and the thick liquid after the fine grinding filters can fall into on connection pad (94) through thick liquid passageway (936), realizes making level to the benefit thick liquid of stem terminal surface.
7. The high-precision in-service concrete strength rapid detection equipment according to claim 6, characterized in that: the coaxial connecting cylinder (937) that is fixed with in the below of guide cylinder (935), the coaxial water conservancy diversion seat (95) that is fixed with in the below of connecting cylinder (973), water conservancy diversion seat (95) can wrap up in the outside of coring barrel (96), and rotate with coring barrel (96) through wear-resisting cover and link to each other, leave the clearance between interior top of water conservancy diversion seat (95) and connection pad (94) to constitute the water conservancy diversion space.
8. The high-precision in-service concrete strength rapid detection equipment according to claim 6, characterized in that: two groups of telescopic rods (13) are further fixedly and symmetrically embedded in the follow-up arm (8), and telescopic ends of the telescopic rods (13) are fixedly connected with the mounting seat (92);
a sealing ring seat (33) is fixed on the inner wall of the limiting cylinder (932), an annular limiting groove is formed in the inner wall of the sealing ring seat (33), and a limiting ring table coaxially fixed outside the rotating shaft (91) is arranged in the annular limiting groove in a limiting and rotating manner;
the one end that thick liquid seat (931) was mended in pivot (91) extension still circumference array has the multiunit to extend along the axis of pivot (91) spacing slider (911), spacing slider (911) slide to set up on actuating lever (12) correspond spacing groove (121) of seting up in to can utilize actuating lever (12) to drive pivot (91) and rotate, and drive pivot (91) through telescopic link (13) and slide along the axial of actuating lever (12), actuating lever (12) are fixed continuous with the output end of coring motor (10).
9. The high-precision in-service concrete strength rapid detection equipment according to claim 5, characterized in that: the bottom of disk body (9101) has evenly laid the dish of polishing (9103), dish of polishing (9103) and disk body (9102) bottom mend thick liquid hole (9102) interval setting, still evenly laid multiunit choked flow pad (9104) on the bottom outer circumference of disk body (9102), the thickness of choked flow pad (9104) is unanimous with the thickness of dish of polishing (9103).
10. The high-precision in-service concrete strength rapid detection equipment according to claim 1, characterized in that: and a plurality of groups of resistance-increasing rods (11) are fixed on the follower arm (8) and are close to one side of the coring assembly (9) in a circumferential array manner.
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| CN202010972428.8A CN112033734B (en) | 2020-09-16 | 2020-09-16 | High-precision in-service concrete strength rapid detection equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115506596A (en) * | 2022-06-09 | 2022-12-23 | 江苏国鹏建工集团有限公司 | Quality control method for post-tensioned pre-stressed beam construction |
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| CN115506596A (en) * | 2022-06-09 | 2022-12-23 | 江苏国鹏建工集团有限公司 | Quality control method for post-tensioned pre-stressed beam construction |
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