Device and method for detecting strength of precast concrete for constructional engineering

Abstract

The invention discloses a precast concrete strength detection device for constructional engineering, and the device comprises a detection frame unit which comprises a detection table and a precast concrete placed above the detection table; the matrix driving unit comprises two pairs of supporting plates fixedly arranged at the edge of the upper side wall of the detection table and rotating rods rotationally connected between each pair of supporting rods; the invention discloses a method for detecting the strength of a concrete prefabricated part for constructional engineering. The method comprises the following steps: S1, placing the concrete prefabricated part needing to be subjected to strength detection on a detection table, and fixing the concrete prefabricated part; s2, a stepping motor is started, and a threaded sleeve in threaded connection with a rotating rod drives an ox horn limiting block to extrude a first elastic touch switch for the first time; according to the method, workers do not need to manually detect the strength of each point position in sequence, the time required for polishing and soot blowing is saved, and the strength detection efficiency of the concrete prefabricated part is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete strength detection, and in particular to a concrete prefabricated component strength detection device and method for construction engineering. Background Art

[0002] Precast concrete parts refer to concrete components that are prefabricated and cured in a factory or a special prefabrication plant outside the construction site. These precast parts are directly transported to the construction site for assembly or installation during construction. Precast concrete parts are often used in high-rise buildings, bridges, roads, tunnels, and pipeline corridors. Currently, in the process of construction, in order to ensure the quality of the project, it is necessary to test the bearing strength of precast concrete parts.

[0003] At present, in the process of testing concrete precast parts in the concrete field, it is often necessary to measure in advance on the concrete surface and mark array-type test points. In the prior art, nine-square format points are often used to test the strength of concrete precast parts. Workers are required to manually use a rebound hammer to repeatedly press the pre-marked array-type points, record the rebound value, and repeat the above operation to complete the strength test of the precast parts. The operation is relatively cumbersome, which indirectly reduces the efficiency of the strength test of the concrete precast parts. Therefore, it is necessary to design a concrete precast part strength test device and method for construction engineering to solve the above problems. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the problems existing in the above-mentioned existing concrete precast member strength detection device and method for construction engineering, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a concrete precast part strength detection device and method for construction engineering, which is suitable for solving the problem that workers need to manually use a rebound hammer to repeatedly press according to pre-marked array points, record the rebound value, and repeat the above operation to complete the precast part strength detection. The operation is relatively cumbersome, which indirectly reduces the detection efficiency of the concrete precast part strength.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a strength detection device for precast concrete parts for construction engineering, comprising:

[0008] The detection frame unit comprises a detection platform and a precast concrete part placed above the detection platform, a lifting plate is arranged on one side above the detection platform, and a plurality of evenly distributed rebound hammers are fixedly connected to one side of the lower side wall of the lifting plate;

[0009] A matrix driving unit, comprising two pairs of support plates fixedly arranged at the edges of the side walls of the detection platform and a rotating rod rotatably connected between each pair of support rods, each of the rotating rods outwardly penetrating one of the support plate fixed sleeves is provided with a transmission sprocket, the two transmission sprockets are connected by transmission chains, a stepper motor is fixedly installed on the upper end of one of the support plate side walls, the stepper motor output shaft is fixedly connected to the top end of one of the rotating rods, a sparse thread portion and a dense thread portion are cross-arranged on the rotating rod, and each rotating rod is threadedly connected with a corresponding thread sleeve, a connecting plate is fixedly connected between the two thread sleeves, and a plurality of symmetrically positioned electric telescopic rods are fixedly connected between the lower side wall of the connecting plate and the upper side wall of the lifting plate;

[0010] A state switching control unit comprises two limit bars fixedly mounted on the upper ends of the side walls of the support plate, each of the threaded sleeves being fixedly mounted with a horn limit block, and the limit bars being provided with limit slides matching the horn limit blocks, a plurality of groups of evenly distributed first elastic touch switches being fixedly arranged in one of the limit slides, and a second elastic touch switch being fixedly mounted on the inner end wall of one of the limit slides, the first elastic touch switch being electrically connected to the electric telescopic rod, and the second elastic touch switch being electrically connected to the stepping motor.

[0011] As a preferred solution of the concrete precast parts strength detection device for construction engineering described in the present invention, the detection device also includes a fixed-point grinding unit, which includes a plurality of spiral cylinders fixedly arranged on the side of the lower side wall of the lifting plate away from the rebound tester, a corresponding rotating column is arranged in the spiral cylinder, a plurality of groups of evenly distributed spiral grooves are arranged on the inner wall of the spiral cylinder, and a plurality of spiral sliders matching the spiral grooves are arranged on the upper end of the side wall of the rotating column, a grinding disk is fixedly connected to the lower end of the rotating column, and a rotating disk is rotatably sleeved on the lower end of the side wall of the rotating column, a plurality of groups of evenly distributed guide telescopic rods are fixedly connected to the upper side wall of the rotating disk and the lower side wall of the lifting plate, each of the guide telescopic rods is sleeved with a first spring, and the upper and lower ends of the first spring are respectively fixedly connected to the lower side wall of the lifting plate and the upper side wall of the rotating disk.

[0012] As a preferred solution of the strength detection device for precast concrete parts for construction projects described in the present invention, the detection device also includes a dust blowing and sucking unit, which includes a plurality of air cylinders arranged below the lifting plate and a piston plate vertically sealed and slidably connected to the inner wall of the air cylinder, the center of the upper side wall of the piston plate is fixedly connected to the lower side wall of the lifting plate by a piston rod, a fixed disk is fixedly sleeved on the upper end of the side wall of the air cylinder, a second spring is fixedly connected between the upper side wall of the fixed disk and the lower side wall of the lifting plate, and the second spring sleeve is arranged on the outside of the piston rod, and a plurality of groups of evenly distributed dust blowing valves and air supply valves are fixedly arranged on the side of the lower end of the side wall of the air cylinder close to the rebound tester.

[0013] As a preferred solution of the concrete precast component strength detection device for construction engineering described in the present invention, an inspection port is provided at the lower end of the gas cylinder, and a corresponding threaded plug is provided in the inspection port.

[0014] As a preferred solution of the concrete precast part strength detection device for construction engineering described in the present invention, the detection frame unit also includes a precast part positioning assembly, which includes two fixing ears fixedly installed on the two ends of the side wall of the detection platform and a threaded rod threadedly connected to the corresponding fixing ears, each of the threaded rods passes through the fixing ears and is rotatably connected to a clamping plate, and the clamping plate is laterally slidably connected to the detection platform.

[0015] As a preferred solution of the concrete precast component strength detection device for construction engineering described in the present invention, wherein: a reinforcing arm is fixedly connected between each pair of the support plates, and each of the reinforcing arms is located below the rotating rod.

[0016] As a preferred solution of the concrete precast component strength detection device for construction engineering described in the present invention, wherein: a plurality of groups of evenly distributed running wheels are arranged on the lower side wall of the detection platform, and each of the running wheels is a universal brake wheel.

[0017] As a preferred solution of the concrete precast part strength detection device for construction engineering described in the present invention, the detection device also includes an electric grinding unit, which includes multiple grinding motors fixedly installed on the side wall of the lifting plate away from the electric telescopic rod, the first elastic touch switch is electrically connected to the grinding motor, each of the grinding motor output shafts penetrates downward through the lifting plate and is fixedly connected to a hollow cylinder, the lower end of the hollow cylinder is vertically slidably connected to a vertical slide bar, the lower end of the side wall of the vertical slide bar is fixedly sleeved with a fixing ring, the upper end of the side wall of the hollow cylinder is also fixedly sleeved with a fixing ring, a third spring is fixedly connected between the two fixing rings, the third spring is located on the outside of the hollow cylinder and the vertical slide bar, and the lower end of the vertical slide bar is also fixedly connected to a grinding disc.

[0018] As a preferred solution of the concrete precast component strength detection device for construction engineering described in the present invention, the transmission sprocket and the transmission chain are both made of manganese steel, and the transmission sprocket is provided with a plurality of groups of evenly distributed anti-slip grooves.

[0019] A method for detecting strength of precast concrete parts for construction engineering, the method is applicable to any of the above detection devices, and the method comprises the following steps:

[0020] S1: Place the precast concrete parts that need to be tested for strength on the testing table and fix them;

[0021] S2: Start the stepper motor, and the threaded sleeve connected to the rotating rod thread drives the horn limit block to squeeze the first elastic touch switch for the first time. During the descending process, the electric telescopic rod drives the rotating column and the grinding disc to grind the next row of points to be tested on the concrete precast part;

[0022] S3: After the horn limit block squeezes the first elastic touch switch for the second time, it will control the lifting plate to retract. By repeating the above operation, the strength detection of the array points on the concrete precast part can be realized;

[0023] S4: As the threaded sleeve moves to the end, the second elastic touch switch is squeezed, which controls the stepper motor to reverse and drive the rebound tester to reset.

[0024] The beneficial effects of the present invention are as follows: a prefabricated concrete part that needs to be tested for strength is placed on the testing table, and when the threaded sleeve threadedly connected to the rotating rod moves to the coarse threaded portion on the rotating rod, the horn limit block fixedly connected to the threaded sleeve squeezes the first elastic touch switch for the first time, which controls the electric telescopic rod to drive the lifting plate and the rebound tester to descend, and at the same time, the spiral cylinder fixedly arranged at the lower end of the lifting plate drives the rotating column and the grinding disc to rotate during the downward pressing process, so as to grind the upper and lower rows of test points of the prefabricated concrete part, and before the rebound tester contacts the prefabricated concrete part, the lower end of the gas cylinder contacts the prefabricated concrete part first, and when the lifting plate drives the piston rod and the piston plate to press downward, the gas in the gas cylinder blows away the dust and dirt produced by grinding in the area of ​​the test point facing the rebound tester through multiple dust blowing valves;

[0025] When the end of the horn limit block squeezes the first elastic touch switch for the second time, the threaded sleeve moves out of the dense threaded part, the rebound hammer is pressed down, and the electric telescopic rod drives the lifting plate and the rebound hammer to reset. The above operations are repeated to complete the strength test of the nine-square format test points on the surface of the precast concrete part. The initial three measurement points of the rebound hammer are not included in the data, and the staff does not need to manually test the strength of each point in turn. When testing the front row, the next row of test points can be polished at the same time, and the test points can be blown off between measurements, which saves the time required for polishing and blowing, and further improves the efficiency of strength testing of precast concrete parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0027] Figure 1 This is a schematic diagram of the overall structure of a concrete precast component strength detection device for construction engineering proposed by the present invention;

[0028] Figure 2 This is a schematic structural diagram of a precast component positioning assembly of a concrete precast component strength detection device for construction engineering proposed by the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of a matrix drive unit of a concrete precast component strength detection device for construction engineering proposed by the present invention;

[0030] Figure 4 A schematic diagram of the coordination structure of a lifting plate, a rebound tester and a precast concrete part in a precast concrete part strength detection device for construction engineering proposed by the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of a fixed-point grinding unit of a concrete precast component strength detection device for construction engineering proposed by the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the ash blowing and suction unit of a concrete precast component strength detection device for construction engineering proposed by the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of an electric grinding unit of a concrete precast component strength detection device for construction engineering proposed by the present invention;

[0034] Figure 8The present invention is a schematic diagram of the implementation steps of a method for detecting strength of precast concrete parts for construction engineering.

[0035] Description of the drawings: 100 detection frame unit, 101 detection platform, 102 concrete precast part, 103 walking wheel, 104 lifting plate, 105 rebound tester, 106 precast part positioning assembly, 106a fixing ear, 106b threaded rod, 106c clamping plate, 200 matrix drive unit, 201 support plate, 202 reinforcement arm, 203 rotating rod, 204 transmission chain, 205 stepping motor, 206 threaded sleeve, 207 connecting plate, 208 electric telescopic rod, 300 state switching control unit, 301 limit strip, 302 horn limit block, 303 first elastic touch switch Off, 304 second elastic touch switch, 400 fixed-point grinding unit, 401 spiral cylinder, 402 rotating column, 403 spiral groove, 404 spiral slider, 405 grinding disc, 406 rotating disc, 407 guide telescopic rod, 408 first spring, 500 ash blowing and sucking unit, 501 air cylinder, 502 piston disc, 503 piston rod, 504 fixed disc, 505 second spring, 506 ash blowing valve, 507 threaded plug, 508 air supply valve, 600 electric grinding unit, 601 grinding motor, 602 hollow cylinder, 603 vertical slide rod, 604 fixed ring, 605 third spring. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0039] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0040] Embodiment 1

[0041] Reference Figure 1-Figure 6 and Figure 8 , which is an embodiment of the present invention, provides a concrete precast component strength detection device for construction engineering, including: a detection frame unit 100, a matrix driving unit 200, a state switching control unit 300, a fixed-point grinding unit 400 and an ash blowing and suction unit 500.

[0042] Among them, the detection frame unit 100 includes a detection platform 101 and a concrete prefabricated part 102 placed above the detection platform 101, and a plurality of groups of evenly distributed running wheels 103 are arranged on the lower side wall of the detection platform 101, and each running wheel 103 is a universal brake wheel. Through the arrangement of the running wheels 103, the strength detection device can be flexibly moved according to the strength detection requirements of the concrete prefabricated part 102. A lifting plate 104 is arranged on one side above the detection platform 101, and a plurality of evenly distributed rebound hammers 105 are fixedly connected to one side of the lower side wall of the lifting plate 104. The basic principle of the rebound hammer 105 is to use a spring to drive a heavy hammer, and the heavy hammer strikes the impact rod in vertical contact with the concrete surface with constant kinetic energy, so that the local concrete is deformed and absorbs part of the energy, and the other part of the energy is converted into the rebound kinetic energy of the heavy hammer. When the rebound kinetic energy is completely converted into potential energy, the heavy hammer rebounds to a maximum distance, and the instrument displays the maximum rebound distance of the heavy hammer in the name of a rebound value. It is often used in the field of concrete strength detection and belongs to a very mature prior art. Therefore, the present invention does not introduce its working principle in detail;

[0043] Secondly, the detection frame unit 100 also includes a preform positioning assembly 106, which includes two fixing ears 106a fixedly installed at both ends of the upper side wall of the detection platform 101 and a threaded rod 106b threadedly connected to the corresponding fixing ears 106a, each threaded rod 106b passes through the fixing ear 106a and is rotatably connected to a clamping plate 106c, and the clamping plate 106c is horizontally slidably connected to the detection platform 101.

[0044] Furthermore, the matrix driving unit 200 includes two pairs of support plates 201 fixedly arranged at the edge of the upper side wall of the detection platform 101 and a rotating rod 203 rotatably connected between each pair of support rods, each pair of support plates 201 is fixedly connected with a reinforcing arm 202, each reinforcing arm 202 is located below the rotating rod 203, and the connection strength between the two adjacent pairs of support plates 201 is improved by the arrangement of the reinforcing arm 202, each rotating rod 203 penetrates outwardly through one of the support plates 201 and is fixedly sleeved with a transmission sprocket, and the two transmission sprockets are connected through a transmission chain 204, and the transmission sprocket and the transmission chain 204 are made of manganese steel, and a plurality of groups of evenly distributed anti-skid patterns are arranged on the transmission sprocket, and the transmission sprocket and the transmission chain 204 made of manganese steel have good wear resistance and are resistant to extrusion. The pressure resistance is good, and the setting of the anti-skid pattern further improves the transmission stability of the transmission sprocket and the transmission chain 204. A stepper motor 205 is fixedly installed on the upper end of the side wall of one of the support plates 201. The stepper motor 205 is an electric motor that converts an electrical pulse signal into a corresponding angular displacement or linear displacement. Each time a pulse signal is input, the rotor rotates an angle or moves forward one step. The output shaft of the stepper motor 205 is fixedly connected to the top of one of the rotating rods 203. The rotating rod 203 is cross-arranged with a sparse thread portion and a dense thread portion, and each rotating rod 203 is threadedly connected with a corresponding threaded sleeve 206. A connecting plate 207 is fixedly connected between the two threaded sleeves 206. A plurality of symmetrically positioned electric telescopic rods 208 are fixedly connected between the lower side wall of the connecting plate 207 and the upper side wall of the lifting plate 104.

[0045] Furthermore, the state switching control unit 300 includes two limit bars 301 fixedly mounted on the upper end of the side wall of the support plate 201, and a horn limit block 302 is fixedly mounted on each threaded sleeve 206. The horn limit block 302 has protrusions at both ends and a depression in the middle to ensure that the horn limit block 302 can squeeze the corresponding first elastic touch switch 303 twice when it moves, and a limit groove matching the horn limit block 302 is provided on the limit bar 301, and a plurality of groups of evenly distributed first elastic touch switches are fixedly arranged in one of the limit grooves. A control switch 303 is provided, and a second elastic touch switch 304 is fixedly installed on the inner end wall of one of the limit slide grooves. The first elastic touch switch 303 is electrically connected to the electric telescopic rod 208, and the second elastic touch switch 304 is electrically connected to the stepping motor 205. In the present invention, after each strength test of a precast concrete part is completed, a reset process is required, and the number of times the first elastic touch switch 303 and the second elastic touch switch 304 are squeezed is reset to zero. This belongs to a very mature prior art and is not described in detail in the present invention.

[0046] Furthermore, the fixed-point grinding unit 400 includes a plurality of spiral cylinders 401 fixedly arranged on the lower side wall of the lifting plate 104 away from the side of the rebound tester 105, a corresponding rotating column 402 is arranged in the spiral cylinder 401, a plurality of groups of evenly distributed spiral grooves 403 are arranged on the inner wall of the spiral cylinder 401, and a plurality of spiral sliders 404 matching the spiral grooves 403 are arranged on the upper end of the side wall of the rotating column 402, a grinding disk 405 is fixedly connected to the lower end of the rotating column 402, and a rotating disk 406 is rotatably sleeved on the lower end of the side wall of the rotating column 402, a plurality of groups of evenly distributed guide telescopic rods 407 are fixedly connected to the upper side wall of the rotating disk 406 and the lower side wall of the lifting plate 104, each guide telescopic rod 407 is sleeved with a first spring 408, and the upper and lower ends of the first spring 408 are respectively fixedly connected to the lower side wall of the lifting plate 104 and the upper side wall of the rotating disk 406.

[0047] Furthermore, the ash blowing and suction unit 500 includes a plurality of air cylinders 501 arranged below the lifting plate 104 and a piston plate 502 which is vertically sealed and slidably connected to the inner wall of the air cylinder 501. The center of the upper side wall of the piston plate 502 is fixedly connected to the lower side wall of the lifting plate 104 by a piston rod 503. A fixed disk 504 is fixedly sleeved on the upper end of the side wall of the air cylinder 501. A second spring 505 is fixedly connected between the upper side wall of the fixed disk 504 and the lower side wall of the lifting plate 104, and the second spring 505 is sleeved on the outside of the piston rod 503. A plurality of groups of evenly distributed ash blowing valves 506 and air supply valves 508 are fixedly arranged on one side of the lower end of the side wall of the air cylinder 501 close to the rebound instrument 105. An inspection port is opened at the lower end of the air cylinder 501, and a corresponding threaded plug 507 is arranged in the inspection port. Through the setting of the threaded plug, the piston plate 502 in the air cylinder can be inspected and maintained according to actual needs to ensure that it always maintains a good sealing performance.

[0048] A method for testing the strength of precast concrete parts for construction engineering, the method is applicable to any of the above testing devices, and the method comprises the following steps:

[0049] S1: placing the precast concrete part 102 to be tested for strength on the testing table 101 and fixing it;

[0050] S2: Start the stepper motor 205, and the threaded sleeve 206 threadedly connected to the rotating rod 203 drives the horn limit block 302 to squeeze the first elastic touch switch 303 for the first time. During the descending process, the electric telescopic rod 208 drives the rotating column 402 and the grinding disc 405 to grind the next row of points to be inspected of the precast concrete part 102;

[0051] S3: After the horn limit block 302 squeezes the first elastic touch switch 303 for the second time, it controls the lifting plate 104 to shrink. By repeating the above operation, the strength detection of the array points on the prefabricated concrete part 102 can be realized;

[0052] S4: As the threaded sleeve 206 moves to the end, the second elastic touch switch 304 is squeezed, which controls the stepping motor 205 to reverse and drive the rebound tester 105 to reset.

[0053] Embodiment 2

[0054] Reference Figure 7 , which is different from the first embodiment in that: the detection device also includes an electric grinding unit 600, which includes a plurality of grinding motors 601 fixedly mounted on the upper side wall of the lifting plate 104 away from the electric telescopic rod 208, the first elastic touch switch 303 is electrically connected to the grinding motor 601, and the output shaft of each grinding motor 601 penetrates downwardly through the lifting plate 104 and is fixedly connected to a hollow cylinder 602, the lower end of the hollow cylinder 602 is vertically slidably connected to a vertical slide bar 603, the lower end of the side wall of the vertical slide bar 603 is fixedly sleeved with a fixing ring 604, the upper end of the side wall of the hollow cylinder 602 is also fixedly sleeved with a fixing ring 604, a third spring 605 is fixedly connected between the two fixing rings 604, the third spring 605 is located outside the hollow cylinder 602 and the vertical slide bar 603, and the lower end of the vertical slide bar 603 is also fixedly connected to a grinding disc 405; when the threaded sleeve 206 is driven to move on the rotating rod 203 When the front end of the horn limit block 302 fixedly arranged on the threaded sleeve 206 squeezes the first elastic touch switch 303 for the first time, the first elastic touch switch 303 controls the electric telescopic rod 208 to drive the lifting plate 104 to press down and start the grinding motor 601. Before the rebound hammer 105 fixedly arranged at the lower end of the lifting plate 104 contacts the precast concrete part 102, the hollow cylinder 602, the vertical slide rod 603 and the grinding disc 405 driven by the grinding motor 601 can grind the next row of points to be tested to ensure the accuracy of the subsequent detection values ​​of this row of detection points by the rebound hammer 105. When the horn limit block 302 squeezes the first elastic touch switch 303 for the second time, the rebound hammer 105 completes the measurement of the previous row of points. When the electric telescopic rod 208 drives the rebound hammer 105 to reset, the first elastic touch switch 303 will also synchronously turn off the grinding motor 205.

[0055] During use, the precast concrete part 102 that needs to be tested for strength is placed on the testing table 101 and fixed, and the stepper motor 205 is started. When the threaded sleeve 206 threadedly connected to the rotating rod 203 moves to the coarse threaded portion on the rotating rod 203, the horn limit block 302 fixedly connected to the threaded sleeve 206 squeezes the first elastic touch switch 303 for the first time, which controls the electric telescopic rod 208 to drive the lifting plate 104 and the rebound tester 105 to descend. At the same time, the screw fixed at the lower end of the lifting plate 104 is The rotary cylinder 401 drives the rotating column 402 and the grinding disc 405 to rotate during the downward pressing process, so as to grind the upper and lower rows of test points of the precast concrete part 102, and before the rebound hammer 105 contacts the precast concrete part 102, the lower end of the gas cylinder 501 contacts the precast concrete part 102 first, and the lifting plate 104 drives the piston rod 503 and the piston plate 502 to press downward, and the gas in the gas cylinder 501 blows away the dust and dirt produced by grinding in the test point area facing the rebound hammer 105 through multiple dust blowing valves 506;

[0056] When the end of the horn limit block 302 squeezes the first elastic touch switch 303 for the second time, the threaded sleeve 206 moves out of the dense threaded portion, the rebound tester 105 is pressed down, and the electric telescopic rod 208 drives the lifting plate 104 and the rebound tester 105 to reset. The above operations are repeated to complete the strength detection of the nine-square format test points on the surface of the prefabricated concrete part 102 in sequence. When the threaded sleeve 206 drives the horn limit block 302 to move to the end of the rotating rod 203, the horn limit block 302 will squeeze the second elastic touch switch 304, and the second elastic touch switch 304 will control the stepping motor 205 to reverse and control the threaded sleeve 206 to reset. The initial three measuring points of the rebound tester 105 are not included in the data, and there is no need for the staff to manually detect the strength of each point in turn. When the front row is detected, the next row of test points can be polished at the same time, and the test points can be blown between measurements, which saves the time required for polishing and blowing, and further improves the strength detection efficiency of the prefabricated concrete part 102.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A concrete prefabricated part strength detection device for construction engineering, characterized in that: include: A detection frame unit (100) comprises a detection platform (101) and a prefabricated concrete part (102) placed above the detection platform (101), a lifting plate (104) is arranged on one side above the detection platform (101), and a plurality of evenly distributed rebound hammers (105) are fixedly connected to one side of a lower side wall of the lifting plate (104); A matrix drive unit (200) comprises two pairs of support plates (201) fixedly arranged at the edges of the upper side walls of a detection platform (101) and rotating rods (203) rotatably connected between each pair of support rods, each rotating rod (203) extending outwardly through one of the support plates (201) and fixedly sleeved with a transmission sprocket, the two transmission sprockets being transmission-connected via a transmission chain (204), a stepping motor (205) being fixedly mounted on the upper end of the side wall of one of the support plates (201), and The output shaft of the stepping motor (205) is fixedly connected to the top of one of the rotating rods (203); the rotating rod (203) is cross-arranged with a sparse thread portion and a dense thread portion, and each rotating rod (203) is threadedly connected to a corresponding threaded sleeve (206); a connecting plate (207) is fixedly connected between the two threaded sleeves (206); and a plurality of symmetrically positioned electric telescopic rods (208) are fixedly connected between the lower side wall of the connecting plate (207) and the upper side wall of the lifting plate (104); The state switching control unit (300) comprises two limit bars (301) fixedly mounted on the upper end of the side wall of the support plate (201), each of the threaded sleeves (206) being fixedly mounted with a horn limit block (302), and the limit bars (301) being provided with a limit slide matching the horn limit block (302), a plurality of groups of evenly distributed first elastic touch switches (303) being fixedly mounted in one of the limit slides, and a second elastic touch switch (304) being fixedly mounted on the inner end wall of one of the limit slides, the first elastic touch switch (303) being electrically connected to the electric telescopic rod (208), and when the threaded sleeve (206) threadedly connected to the rotating rod (203) moves to the coarse threaded portion on the rotating rod (203), the threaded sleeve (206) being connected to the electric telescopic rod (208) is in contact with the threaded sleeve (208) at this time. 06) The fixedly connected horn limit block (302) squeezes the first elastic touch switch (303) for the first time, which controls the electric telescopic rod (208) to drive the lifting plate (104) and the rebound instrument (105) to descend. When the horn limit block (302) squeezes the first elastic touch switch (303) for the second time, it controls the electric telescopic rod (208) to extend. The second elastic touch switch (304) is electrically connected to the stepper motor (205). When the threaded sleeve (206) drives the horn limit block (302) to move to the end of the rotating rod (203), the horn limit block (302) squeezes the second elastic touch switch (304), and the second elastic touch switch (304) then controls the stepper motor (205) to reverse and controls the threaded sleeve (206) to reset.

2. A precast concrete component strength detection device for construction engineering according to claim 1, characterized in that: The detection device also includes a fixed-point grinding unit (400), which includes a plurality of spiral cylinders (401) fixedly arranged on the lower side wall of the lifting plate (104) away from the rebound tester (105), wherein a corresponding rotating column (402) is arranged in the spiral cylinder (401), and the inner wall of the spiral cylinder (401) is provided with a plurality of groups of evenly distributed spiral grooves (403), and the upper end of the side wall of the rotating column (402) is provided with a plurality of spiral sliders (404) matching the spiral grooves (403), and the rotating column (40 2) A grinding disc (405) is fixedly connected to the lower end, and a rotating disc (406) is rotatably sleeved on the lower end of the side wall of the rotating column (402), and a plurality of groups of uniformly distributed guide telescopic rods (407) are fixedly connected to the upper side wall of the rotating disc (406) and the lower side wall of the lifting plate (104), and each of the guide telescopic rods (407) is sleeved with a first spring (408), and the upper and lower ends of the first spring (408) are respectively fixedly connected to the lower side wall of the lifting plate (104) and the upper side wall of the rotating disc (406).

3. The precast concrete component strength detection device for construction engineering according to claim 1, characterized in that: The detection device also includes a dust blowing and suction unit (500), which includes a plurality of air cylinders (501) arranged below the lifting plate (104) and a piston plate (502) vertically sealed and slidably connected to the inner wall of the air cylinder (501); the center of the upper side wall of the piston plate (502) is fixedly connected to the lower side wall of the lifting plate (104) via a piston rod (503); a fixed disk (504) is fixedly sleeved on the upper end of the side wall of the air cylinder (501); a second spring (505) is fixedly connected between the upper side wall of the fixed disk (504) and the lower side wall of the lifting plate (104), and the second spring (505) is sleeved on the outside of the piston rod (503); and a plurality of groups of evenly distributed dust blowing valves (506) and air supply valves (508) are fixedly arranged on one side of the lower end of the side wall of the air cylinder (501) close to the rebound tester (105).

4. The precast concrete component strength detection device for construction engineering according to claim 3, characterized in that: The lower end of the gas cylinder (501) is provided with an inspection port, and a corresponding threaded plug (507) is arranged in the inspection port.

5. The precast concrete component strength detection device for construction engineering according to claim 1, characterized in that: The detection frame unit (100) further comprises a preform positioning assembly (106), which comprises two fixing ears (106a) fixedly mounted at both ends of the upper side wall of the detection platform (101) and a threaded rod (106b) threadedly connected to the corresponding fixing ears (106a), each of the threaded rods (106b) passing through the fixing ears (106a) and being rotatably connected to a clamping plate (106c), and the clamping plate (106c) is lateral slidingly connected to the detection platform (101).

6. The precast concrete component strength detection device for construction engineering according to claim 1, characterized in that: A reinforcing arm (202) is fixedly connected between each pair of support plates (201), and each reinforcing arm (202) is located below the rotating rod (203).

7. The precast concrete component strength detection device for construction engineering according to claim 1, characterized in that: The lower side wall of the detection platform (101) is provided with a plurality of groups of evenly distributed running wheels (103), and each of the running wheels (103) is a universal brake wheel.

8. The precast concrete component strength detection device for construction engineering according to claim 1, characterized in that: The detection device further comprises an electric grinding unit (600), which comprises a plurality of grinding motors (601) fixedly mounted on a side wall of the lifting plate (104) away from the electric telescopic rod (208), the first elastic touch switch (303) being electrically connected to the grinding motor (601), the output shaft of each grinding motor (601) penetrating downward through the lifting plate (104) and being fixedly connected to a hollow cylinder (602), the lower end of the hollow cylinder (602) being vertically slidably connected to A vertical slide bar (603), a fixing ring (604) is fixedly sleeved on the lower end of the side wall of the vertical slide bar (603), a fixing ring (604) is also fixedly sleeved on the upper end of the side wall of the hollow cylinder (602), a third spring (605) is fixedly connected between the two fixing rings (604), the third spring (605) is located outside the hollow cylinder (602) and the vertical slide bar (603), and a grinding disc (405) is also fixedly connected to the lower end of the vertical slide bar (603).

9. The precast concrete component strength detection device for construction engineering according to claim 1, characterized in that: The transmission sprocket and the transmission chain (204) are both made of manganese steel, and the transmission sprocket is provided with a plurality of groups of evenly distributed anti-skid patterns.

10. A method for detecting strength of precast concrete parts for construction engineering, the method being applicable to any one of the detection devices in claims 1 to 9 above, characterized in that: And the detection method comprises the following steps: S1: placing a prefabricated concrete component (102) to be tested for strength on a testing table (101) and fixing it; S2: starting the stepper motor (205), the threaded sleeve (206) threadedly connected to the rotating rod (203) drives the horn limit block (302) to squeeze the first elastic touch switch (303) for the first time, and the electric telescopic rod (208) drives the rotating column (402) and the grinding disc (405) to grind the next row of points to be inspected of the concrete prefabricated part (102) during the process of descending; S3: After the horn limit block (302) squeezes the first elastic touch switch (303) for the second time, it controls the lifting plate (104) to shrink. By repeating the above operation, the strength detection of the array points on the concrete prefabricated part (102) can be realized; S4: As the threaded sleeve (206) moves to the end, the second elastic touch switch (304) is squeezed, which controls the stepping motor (205) to reverse and drive the rebound tester (105) to reset.

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