A concrete strength testing device

Abstract

The present invention relates to the technical field of detection devices, and specifically to a concrete strength detection device. A concrete strength detection device includes a sampling mechanism and an adjustment mechanism. The sampling mechanism includes a fixed cylinder, a drilling cylinder and a feed cylinder. The adjustment mechanism includes a winding rack, a plurality of protective film strips and a plurality of steel wires. A concrete strength detection device is provided with a sampling mechanism and an adjustment mechanism, and the protective film strips and steel wires rotate synchronously with the winding rack. As the sample core moves toward the inside of the feed cylinder, the protective film strips and steel wires are pushed by the sample core to move toward the inside of the feed cylinder, and the protective film strips and steel wires are gradually wound around the sample core in a spiral shape. The protective film strips seal and preserve the sample core, and the steel wires support and protect the sample core to prevent the sample core from being disturbed by the external environment. The present invention provides a concrete strength detection device to solve the problem that the sample core of the existing detection equipment is not protected during sampling and the sample core is easily damaged.

Description

Technical Field

[0001] The invention relates to the technical field of detection devices, and in particular to a concrete strength detection device. Background Art

[0002] The detection device is a device used to detect and measure various physical, chemical or biological parameters. It is widely used in scientific research, industrial production, environmental monitoring and other fields. In the construction of various construction projects, concrete is the main building material, and its quality directly affects the stability and durability of the entire project. The strength of concrete is one of the important indicators to measure its quality, which is closely related to the safety, reliability and economy of the project. By testing concrete, the quality, strength and construction effect of concrete can be comprehensively evaluated to ensure the quality and safety of the project.

[0003] When testing concrete, it is necessary to first take out the sample core from the concrete through a sampling device. When sampling, it is necessary to pass coolant to cool it down. The water in the coolant may penetrate into the interior of the sample core. Since there may be tiny cracks or pores on the surface of the sample core, excessive water penetration may affect the quality of the sample core and its actual strength, which is not conducive to subsequent test results. The drill cuttings generated during drilling may also adhere to the surface of the sample core, affecting the appearance of the sample core and may even interfere with the subsequent strength test. Before the test, it is necessary to focus on thoroughly cleaning the surface of the sample core, which is troublesome. The existing sampling device generally pushes the sampling device forward by manual force, but manual force cannot ensure uniform application of force, which will lead to low drilling efficiency. There is also a driving device that pushes the sampling device forward, but the additional setting of the driving device is more costly.

[0004] For example, the invention patent application with the publication number CN118090307A provides a concrete building strength testing device, which injects pressurized flushing fluid into the first flow channel so that the drill cuttings generated by drilling cannot enter between the inner tube and the sample core. However, the flushing fluid can easily penetrate into the sample core, affecting the actual strength of the sample core, and the sample core is easily damaged when it is taken out of the inner tube. Summary of the invention

[0005] The invention provides a concrete strength testing device to solve the problem that the sample core of the existing testing device is not protected and is easily damaged during sampling.

[0006] A concrete strength testing device of the present invention adopts the following technical scheme: A concrete strength testing device includes a sampling mechanism and an adjustment mechanism, the sampling mechanism includes a fixed cylinder, a drilling cylinder and a feeding cylinder, and the fixed cylinder is arranged vertically. The drilling cylinder is arranged vertically, and the drilling cylinder is rotatably arranged at the lower end of the fixed cylinder, and a drill tooth is fixedly arranged at the lower end of the drilling cylinder. The feeding cylinder is rotatably arranged inside the drilling cylinder, and the feeding cylinder and the drilling cylinder are arranged coaxially, and a feeding port is opened at the lower end of the feeding cylinder, and the sample core enters the feeding cylinder.

[0007] The adjustment mechanism includes a winding frame, a plurality of protective film strips and a plurality of steel wires. The winding frame is rotatably arranged in the drilling tube and is located between the drilling tube and the feed tube. The drilling tube drives the feed tube and the winding frame to move up and down synchronously. A plurality of connecting tubes and a plurality of fixing rods are fixedly arranged on the lower side of the winding frame. The connecting tubes and the fixing rods are both arranged vertically, and the plurality of connecting tubes are distributed along the circumference of the drilling tube, and the plurality of fixing rods are distributed along the circumference of the drilling tube, and each connecting tube is located between two adjacent fixing rods.

[0008] One end of a plurality of steel wires is connected to each other, and the other end of each steel wire passes through a connecting tube from bottom to top and is wound on a winding rack. One end of a plurality of protective film strips is connected to each other, and the other end of each protective film strip is wound on a fixed rod. The protective film strip is located at the lower side of the steel wire, and the protective film strip is used to contact the sample core. In the initial state, the protective film strip and the steel wire are both located at the lower part of the feed cylinder. As the sample core is pushed, the protective film strip and the steel wire enter the inside of the feed cylinder, and are spirally wound on the sample core from the inside to the outside in sequence as the winding rack rotates.

[0009] Furthermore, the adjustment mechanism also includes a plurality of transmission components, which are arranged at the lower part of the inner side wall of the feed tube. The plurality of transmission components are distributed along the circumference of the feed tube, and each transmission component includes a plurality of spiral protrusions, which are sequentially distributed along the vertical direction, and each spiral protrusion is in a spiral shape coaxial with the feed tube. The spiral protrusions cooperate with the spiral transmission of the steel wire wound in a spiral shape.

[0010] Furthermore, the object-wrap rack includes a first connecting ring and a plurality of rotating rods, and the first connecting ring and the drilling tube are coaxially arranged. The rotating rod is arranged on the upper side of the first connecting ring, and the plurality of rotating rods are distributed along the circumference of the first connecting ring, and each rotating rod is arranged along the radial direction of the first connecting ring, and the rotating rod can rotate around its own axis. The two ends of the steel wire are respectively a first end and a second end, and one end where the plurality of steel wires are connected to each other is the first end, and the second end of the steel wire is fixedly arranged on the rotating rod, and the steel wire is wound on the rotating rod.

[0011] Further, the two ends of the protective film strip are respectively the third end and the fourth end, and the end where the plurality of protective film strips are connected to each other is the third end. A detachable mounting tube is provided on each fixing rod, and the mounting tube can rotate relative to the fixing rod, and the mounting tube and the fixing rod are coaxially arranged. The fourth end of the protective film strip is fixedly arranged on the mounting tube, and the protective film strip is wound on the mounting tube.

[0012] Furthermore, a first annular groove is provided inside the upper end of the drilling tube, and the first annular groove is coaxially arranged with the drilling tube. A top cover is fixedly provided at the upper end of the feeding tube, and a fixed tube is fixedly provided on the top cover, and the fixed tube and the feeding tube are coaxially arranged. A second annular groove and a third annular groove are provided on the outer side wall of the fixed tube, and the second annular groove and the third annular groove are both coaxially arranged with the fixed tube, and the second annular groove is located on the upper side of the third annular groove.

[0013] The inner side of the first connecting ring is rotatably arranged in the third annular groove. The lower end of the fixed tube is fixedly provided with a second connecting ring, and the second connecting ring and the fixed tube are coaxially arranged. The inner side of the second connecting ring is rotatably arranged in the second annular groove, and the outer side of the second connecting ring is rotatably arranged in the first annular groove.

[0014] Furthermore, a first gear ring is fixedly arranged on the outer peripheral wall of the drilling tube, and a second gear ring is fixedly arranged on the inner peripheral wall of the drilling tube, and the first gear ring and the second gear ring are both arranged coaxially with the drilling tube. A first gear is fixedly arranged on the fixed tube, and the first gear and the fixed tube are arranged coaxially. A plurality of second gears are arranged on the second connecting ring, and the plurality of second gears are distributed along the circumference of the second connecting ring. The axis of each second gear is arranged vertically, and the second gear can rotate around its own axis, and the second gear is meshed with the second gear ring and the first gear.

[0015] A concrete strength detection device also includes a first driving mechanism, which includes a first motor, the first motor is fixedly arranged on a fixing cylinder, a third gear is fixedly arranged on an output shaft of the first motor, and the third gear is meshed with the first gear ring.

[0016] Furthermore, a concrete strength testing device also includes a second driving mechanism, the second driving mechanism includes a second motor, and the second motor is fixedly arranged on the lower side of the second connecting ring. A fourth gear is fixedly arranged on the output shaft of the second motor. A third gear ring is fixedly arranged on the upper side of the first connecting ring, the third gear ring is coaxially arranged with the first connecting ring, and the fourth gear is meshed with the third gear ring.

[0017] Furthermore, an air jet and an air pump are fixedly arranged on the top cover, the air pump and the air jet are connected, an air pipe is arranged on the air pump, and the air pipe is communicated with the outside.

[0018] Furthermore, a concrete strength testing device also includes a frame, on which a guide rod is fixedly arranged, the guide rod is vertically arranged, a fixed arm capable of sliding up and down is arranged on the guide rod, and a fixed cylinder is fixedly arranged on the fixed arm.

[0019] A concrete strength testing device A concrete strength testing device also includes a detector, which is used to test the strength of the sample core.

[0020] The beneficial effects of the present invention are as follows: a concrete strength testing device of the present invention drives the drilling tube and the winding frame to rotate and move downward through the sampling mechanism and the adjustment mechanism, and the drill teeth on the drilling tube cut the concrete, and the cut sample core enters the inside of the feed tube. The protective film strip and the steel wire rotate synchronously with the winding frame. When the sample core enters the feed tube, the upper end of the sample core will contact the protective film strip and the steel wire. As the sample core moves into the inside of the feed tube, the protective film strip and the steel wire are pushed by the sample core to move into the inside of the feed tube.

[0021] Due to the friction force given by the sample core to the protective film strip and the steel wire, and the protective film strip and the steel wire are located between the sample core and the feed tube, under the action of the feed tube's limit and the friction force given, when the protective film strip and the steel wire rotate relative to the sample core and the sample core continues to move into the feed tube, the protective film strip and the steel wire gradually wrap around the sample core in a spiral shape. After sampling, the protective film strip and the steel wire wrap the sample core, and the spiral protective film strip is located inside the spiral steel wire. The protective film strip seals and preserves the sample core, and the steel wire supports and protects the sample core to prevent the sample core from being disturbed by the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative labor.

[0023] Figure 1 A structural schematic diagram of a concrete strength testing device provided by an embodiment of the present invention;

[0024] Figure 2 An exploded diagram of a sampling mechanism and an adjusting mechanism of a concrete strength testing device provided by an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of a structure in which a protective film strip and a steel wire are spirally shaped in a concrete strength testing device provided by an embodiment of the present invention;

[0026] Figure 4 A front view of a sampling mechanism and an adjusting mechanism of a concrete strength testing device provided by an embodiment of the present invention;

[0027] Figure 5 for Figure 4Sectional view along AA direction;

[0028] Figure 6 for Figure 5 The enlarged view of point B in the middle;

[0029] Figure 7 A schematic diagram of a portion of the structure of a sampling mechanism and an adjustment mechanism of a concrete strength testing device provided by an embodiment of the present invention;

[0030] Figure 8 A schematic structural diagram of a feed cylinder of a concrete strength testing device provided by an embodiment of the present invention;

[0031] Fig. 9 A front view of a feed cylinder of a concrete strength testing device provided in an embodiment of the present invention.

[0032] In the figure: 100, frame; 110, first motor; 120, second motor; 130, guide rod; 140, fixed arm; 150, wheel; 200, fixed cylinder; 210, second connecting ring; 220, second gear; 300, drilling cylinder; 310, drill teeth; 320, first ring groove; 330, second gear ring; 400, feed cylinder; 401, feed port; 410, spiral protrusion; 420, fixed tube; 421, second ring groove; 422, third ring groove; 423, first gear; 500, winding rack; 510, connecting tube; 520, fixed rod; 530, rotating rod; 540, first connecting ring; 550, mounting tube; 600, protective film strip; 610, steel wire; 700, sample core. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Reference Figures 1 to 9As shown, a concrete strength testing device provided by an embodiment of the present invention includes a sampling mechanism and an adjusting mechanism. The sampling mechanism includes a fixed cylinder 200, a drilling cylinder 300 and a feeding cylinder 400. The fixed cylinder 200 is arranged vertically. The drilling cylinder 300 is arranged vertically, and the drilling cylinder 300 is rotatably arranged at the lower end of the fixed cylinder 200. A drill tooth 310 is fixedly arranged at the lower end of the drilling cylinder 300. The feeding cylinder 400 is rotatably arranged inside the drilling cylinder 300, and the feeding cylinder 400 and the drilling cylinder 300 are arranged coaxially. A feed port 401 is opened at the lower end of the feeding cylinder 400. The inner side wall of the drill tooth 310 and the inner side wall of the feeding cylinder 400 are on the same vertical plane, so that the sample core 700 can enter the feeding cylinder 400.

[0035] The adjustment mechanism includes a circumferential rack 500, a plurality of protective film strips 600 and a plurality of steel wires 610. The circumferential rack 500 is rotatably arranged in the drilling tube 300 and is located between the drilling tube 300 and the feed tube 400. The drilling tube 300 drives the feed tube 400 and the circumferential rack 500 to move up and down synchronously. A plurality of connecting tubes 510 and a plurality of fixing rods 520 are fixedly arranged on the lower side of the circumferential rack 500. The connecting tubes 510 and the fixing rods 520 are both arranged vertically, and the plurality of connecting tubes 510 are distributed along the circumference of the drilling tube 300, and the plurality of fixing rods 520 are distributed along the circumference of the drilling tube 300, and each connecting tube 510 is located between two adjacent fixing rods 520.

[0036] One ends of a plurality of steel wires 610 are connected to each other, and the other end of each steel wire 610 passes through a connecting tube 510 from bottom to top and is then wound around the winding rack 500. One ends of a plurality of protective film strips 600 are connected to each other, and the other end of each protective film strip 600 is wound around a fixing rod 520. The protective film strip 600 is located at the lower side of the steel wire 610, and the protective film strip 600 is used to contact the sample core 700. In the initial state, the protective film strip 600 and the steel wire 610 are both located at the lower part of the feed cylinder 400. As the sample core 700 is pushed, the protective film strip 600 and the steel wire 610 enter the interior of the feed cylinder 400, and are spirally wound around the sample core 700 from the inside to the outside in sequence as the winding rack 500 rotates.

[0037] The drilling tube 300 and the winding frame 500 are driven to rotate and move downward, and the drill teeth 310 on the drilling tube 300 cut the concrete, and the cut sample core 700 enters the inside of the feed tube 400. The protective film strip 600 and the steel wire 610 rotate synchronously with the winding frame 500. When the sample core 700 enters the feed tube 400, the upper end of the sample core 700 will contact the protective film strip 600 and the steel wire 610. As the sample core 700 moves into the feed tube 400, the protective film strip 600 and the steel wire 610 are pushed by the sample core 700 to move into the feed tube 400.

[0038] Due to the friction force given by the sample core 700 to the protective film strip 600 and the steel wire 610, and the protective film strip 600 and the steel wire 610 are located between the sample core 700 and the feeding cylinder 400, under the action of the limit of the feeding cylinder 400 and the friction force given, when the protective film strip 600 and the steel wire 610 rotate relative to the sample core 700, and the sample core 700 continuously moves into the feeding cylinder 400, the protective film strip 600 and the steel wire 610 gradually wrap around the sample core 700 in a spiral shape. After sampling is completed, the protective film strip 600 and the steel wire 610 wrap the sample core 700, and the spiral protective film strip 600 is located inside the spiral steel wire 610. The protective film strip 600 seals and stores the sample core 700, and the steel wire 610 supports and protects the sample core 700 to prevent the sample core 700 from being disturbed by the external environment.

[0039] In this embodiment, the adjustment mechanism further includes a plurality of transmission assemblies, which are arranged at the lower part of the inner wall of the feed tube 400. The plurality of transmission assemblies are distributed along the circumference of the feed tube 400, and each transmission assembly includes a plurality of spiral protrusions 410, which are sequentially distributed along the vertical direction, and each spiral protrusion 410 is in a spiral shape coaxial with the feed tube 400. The spiral protrusion 410 and the spirally wound steel wire 610 are spirally driven.

[0040] The feed tube 400 is driven to rotate, and the steel wire 610 is gradually and continuously wound around the sample core 700 in a spiral shape. When the spiral steel wire 610 contacts the spiral protrusion 410, the spiral steel wire 610 and the spiral protrusion 410 are spirally driven. When the spiral protrusion 410 rotates relative to the spiral steel wire 610, the feed tube 400 moves downward relative to the spiral steel wire 610. As the steel wire 610 continuously forms a spiral shape, the spiral steel wire 610 continuously cooperates with the spiral protrusion 410 in a spiral drive, so that the feed tube 400 can continuously move downward, and the drilling tube 300 and the winding frame 500 move downward synchronously. At this time, it is no longer necessary to manually push the drilling tube 300 to move downward, the drilling tube 300 moves more evenly, and the cutting efficiency of the drilling tube 300 is higher. In addition, there is no need to provide additional equipment to drive the drilling tube 300 to move downward, the structure is simpler, and the cost is lower.

[0041] In this embodiment, the object rack 500 includes a first connecting ring 540 and a plurality of rotating rods 530, and the first connecting ring 540 and the drilling tube 300 are coaxially arranged. The rotating rod 530 is arranged on the upper side of the first connecting ring 540, and the plurality of rotating rods 530 are distributed along the circumference of the first connecting ring 540. Each rotating rod 530 is arranged along the radial direction of the first connecting ring 540, and the rotating rod 530 can rotate around its own axis. The two ends of the steel wire 610 are respectively a first end and a second end, and one end of the plurality of steel wires 610 connected to each other is the first end, and the second end of the steel wire 610 is fixedly arranged on the rotating rod 530, and the steel wire 610 is wound around the rotating rod 530.

[0042] In this embodiment, the two ends of the protective film strip 600 are the third end and the fourth end respectively, and the end where the plurality of protective film strips 600 are connected to each other is the third end. A detachable mounting tube 550 is provided on each fixing rod 520, and the mounting tube 550 can rotate relative to the fixing rod 520, and the mounting tube 550 and the fixing rod 520 are coaxially arranged. The fourth end of the protective film strip 600 is fixedly arranged on the mounting tube 550, and the protective film strip 600 is wound on the mounting tube 550.

[0043] In this embodiment, a first annular groove 320 is provided inside the upper end of the drilling tube 300, and the first annular groove 320 is coaxially arranged with the drilling tube 300. A top cover is fixedly provided at the upper end of the feeding tube 400, and a fixed tube 420 is fixedly provided on the top cover, and the fixed tube 420 is coaxially arranged with the feeding tube 400. A second annular groove 421 and a third annular groove 422 are provided on the outer side wall of the fixed tube 420, and the second annular groove 421 and the third annular groove 422 are both coaxially arranged with the fixed tube 420, and the second annular groove 421 is located on the upper side of the third annular groove 422.

[0044] The inner side of the first connecting ring 540 is rotatably disposed in the third annular groove 422. The lower end of the fixed cylinder 200 is fixedly provided with a second connecting ring 210, and the second connecting ring 210 and the fixed cylinder 200 are coaxially disposed. The inner side of the second connecting ring 210 is rotatably disposed in the second annular groove 421, and the outer side of the second connecting ring 210 is rotatably disposed in the first annular groove 320.

[0045] The feed cylinder 400 and the orbiter 500 can move up and down synchronously with the drilling cylinder 300 , and the feed cylinder 400 and the orbiter 500 can rotate relative to the drilling cylinder 300 .

[0046] In this embodiment, a first gear ring is fixedly provided on the outer peripheral wall of the drilling tube 300, and a second gear ring 330 is fixedly provided on the inner peripheral wall of the drilling tube 300. The first gear ring and the second gear ring 330 are both coaxially provided with the drilling tube 300. A first gear 423 is fixedly provided on the fixed tube 420, and the first gear 423 is coaxially provided with the fixed tube 420. A plurality of second gears 220 are provided on the second connecting ring 210, and the plurality of second gears 220 are distributed along the circumference of the second connecting ring 210. The axis of each second gear 220 is vertically provided, and the second gear 220 can rotate around its own axis, and the second gear 220 is meshed with the second gear ring 330 and the first gear 423.

[0047] A concrete strength testing device also includes a first driving mechanism, which includes a first motor 110. The first motor 110 is fixedly arranged on a fixing cylinder 200. A third gear is fixedly arranged on an output shaft of the first motor 110, and the third gear is meshed with the first gear ring.

[0048] When the first motor 110 rotates, it drives the drilling tube 300 to rotate through the third gear. When the drilling tube 300 rotates, it drives the multiple second gears 220 to rotate through the second gear ring 330. When the second gear 220 rotates, it drives the fixed tube 420 to rotate through the first gear 423, thereby driving the feed tube 400 to rotate.

[0049] In this embodiment, a concrete strength testing device further includes a second driving mechanism, which includes a second motor 120, and the second motor 120 is fixedly arranged on the lower side of the second connecting ring 210. A fourth gear is fixedly arranged on the output shaft of the second motor 120. A third gear ring is fixedly arranged on the upper side of the first connecting ring 540, and the third gear ring is coaxially arranged with the first connecting ring 540, and the fourth gear is meshed with the third gear ring. The second motor 120 drives the first connecting ring 540 to rotate through the fourth gear, thereby driving the multiple connecting pipes 510 and the multiple fixing rods 520 to rotate synchronously.

[0050] In this embodiment, the top cover is fixedly provided with an air nozzle and an air pump, the air pump and the air nozzle are connected, and an air pipe is provided on the air pump, and the air pipe is connected to the outside. When the air pump is started, air is blown into the feed tube 400 through the air nozzle, and the air flow ejected from the air nozzle moves in a direction from top to bottom, so that the feed tube 400 can maintain a positive pressure, thereby preventing the coolant from excessively penetrating into the interior of the sample core 700, affecting the quality of the sample core 700, and causing errors during detection.

[0051] When drilling and cutting concrete, a large amount of drill cuttings will be generated, which may adhere to the surface of the sample core 700, affecting the appearance of the sample core 700 and even interfering with the subsequent strength test. The gas ejected from the air nozzle will blow off the drill cuttings on the sample core 700, saving the process of cleaning the surface of the sample core 700 again, saving time and labor, and making sampling more efficient.

[0052] In this embodiment, a concrete strength testing device also includes a frame 100, on which a guide rod 130 is fixedly arranged, the guide rod 130 is vertically arranged, a fixed arm 140 capable of sliding up and down is arranged on the guide rod 130, a fixed cylinder 200 is fixedly arranged on the fixed arm 140, and a plurality of wheels 150 are arranged on the frame 100.

[0053] In this embodiment, a detector is also included, which is not shown in the figure. The detector is a strength detector commonly used in the prior art, and the strength detector is used to detect the strength of the concrete sample core 700.

[0054] Working process: The working state of a concrete strength testing device includes the first stage and the second stage. Move the frame 100 to the target area, and manually press the fixed arm 140 downward to move the drilling cylinder 300 downward. At the same time, the drilling cylinder 300 drives the feed cylinder 400 and the object-circling frame 500 to move downward synchronously. At this time, the working state of a concrete strength testing device is in the first stage.

[0055] The first motor 110, the second motor 120 and the air pump are started at the same time. When the first motor 110 rotates, the drilling tube 300 is driven to rotate through the third gear. When the drilling tube 300 rotates, the drill teeth 310 cut the concrete. When the drilling tube 300 rotates, the second gear ring 330 drives the plurality of second gears 220 to rotate. When the second gear 220 rotates, the fixed tube 420 is driven to rotate through the first gear 423, thereby driving the feed tube 400 to rotate. The second motor 120 drives the first connecting ring 540 to rotate through the fourth gear, thereby driving the plurality of connecting tubes 510 and the plurality of fixing rods 520 to rotate synchronously.

[0056] The drilling tube 300, the feeding tube 400 and the winding rack 500 rotate and move downward. The protective film strip 600 and the steel wire 610 rotate synchronously with the winding rack 500. When the sample core 700 enters the feeding tube 400, the upper end of the sample core 700 will contact the third end of the protective film strip 600 and the first end of the steel wire 610. As the sample core 700 moves into the feeding tube 400, the third end of the protective film strip 600 and the first end of the steel wire 610 are pushed by the sample core 700 to move into the feeding tube 400, that is, the third end of the protective film strip 600 and the first end of the steel wire 610 move upward.

[0057] Due to the friction force given by the sample core 700 to the protective film strip 600 and the steel wire 610, and the fact that the protective film strip 600 and the steel wire 610 are between the sample core 700 and the feeding tube 400, under the action of the limiting force of the feeding tube 400 and the friction force given, when the protective film strip 600 and the steel wire 610 rotate relative to the sample core 700 and the sample core 700 continuously moves toward the inside of the feeding tube 400, the protective film strip 600 and the steel wire 610 are gradually wound around the sample core 700 in a spiral shape.

[0058] The second stage: After the spiral steel wire 610 contacts the spiral protrusion 410, the spiral steel wire 610 and the spiral protrusion 410 are in spiral transmission cooperation. When the spiral protrusion 410 rotates relative to the spiral steel wire 610, the feed tube 400 moves downward relative to the spiral steel wire 610. As the steel wire 610 continuously forms a spiral shape, the spiral steel wire 610 continuously cooperates with the spiral protrusion 410 in spiral transmission, so that the feed tube 400 can continuously move downward, and the drilling tube 300 and the surrounding frame 500 move downward synchronously. At this time, the working state of a concrete strength testing device is in the second stage, and it is no longer necessary to manually push the drilling tube 300 to move downward. The drilling tube 300 moves more evenly, and the cutting efficiency of the drilling tube 300 is higher. And there is no need to provide additional equipment to drive the drilling tube 300 to move downward, so the structure is simpler and the cost is lower.

[0059] When the air pump is started, air is blown into the feed tube 400 through the air nozzle. The air flow ejected from the air nozzle moves in a top-down direction, so that a positive pressure can be maintained in the feed tube 400, thereby preventing excessive coolant from penetrating into the interior of the sample core 700, affecting the quality of the sample core 700 and causing errors during detection.

[0060] When drilling and cutting concrete, a large amount of drill cuttings will be generated, which may adhere to the surface of the sample core 700, affecting the appearance of the sample core 700 and even interfering with the subsequent strength test. The gas ejected from the air nozzle will blow off the drill cuttings on the sample core 700, saving the process of cleaning the surface of the sample core 700 again, saving time and labor, and making sampling more efficient.

[0061] After sampling is completed, the protective film strip 600 and the steel wire 610 wrap the sample core 700, and the spiral protective film strip 600 is inside the spiral steel wire 610. The protective film strip 600 seals and preserves the sample core 700, and the steel wire 610 supports and protects the sample core 700 to prevent the sample core 700 from being disturbed by the external environment. For example, when the sample core 700 is bumped, the protective film strip 600 and the steel wire 610 can provide protection. After sampling is completed, the steel wire 610 and the protective film strip 600 are removed and placed in a detector to test their strength.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A concrete strength testing device, characterized in that: The invention comprises a sampling mechanism and an adjusting mechanism, wherein the sampling mechanism comprises a fixed tube, a drilling tube and a feeding tube, wherein the fixed tube is arranged vertically; the drilling tube is arranged vertically, the drilling tube is rotatably arranged at the lower end of the fixed tube, and a drill tooth is fixedly arranged at the lower end of the drilling tube; the feeding tube is rotatably arranged inside the drilling tube, and the feeding tube and the drilling tube are arranged coaxially, a feeding port is opened at the lower end of the feeding tube, and the sample core enters the feeding tube; the adjusting mechanism comprises a winding frame, a plurality of protective film strips and a plurality of steel wires, the winding frame is rotatably arranged inside the drilling tube, and is located between the drilling tube and the feeding tube, and the drilling tube drives the feeding tube and the winding frame to move up and down synchronously; a plurality of connecting tubes and a plurality of fixing rods are fixedly arranged on the lower side surface of the winding frame; the connecting tubes and the fixing rods are both arranged vertically, a plurality of connecting tubes are distributed along the circumference of the drilling tube, a plurality of fixing rods are distributed along the circumference of the drilling tube, and each connecting tube is located between two adjacent fixing rods; One ends of multiple steel wires are connected to each other, and the other end of each steel wire passes through a connecting tube from bottom to top and is then wound around a winding rack; one ends of multiple protective film strips are connected to each other, and the other end of each protective film strip is wound around a fixed rod; the protective film strips are located at the lower side of the steel wires, and are used to contact the sample core; in the initial state, the protective film strips and the steel wires are both located at the lower part of the feed tube; as the sample core is pushed, the protective film strips and the steel wires enter the interior of the feed tube, and are spirally wound around the sample core from the inside to the outside in sequence as the winding rack rotates.

2. A concrete strength testing device according to claim 1, characterized in that: The adjustment mechanism also includes multiple transmission components, which are arranged at the lower part of the inner wall of the feed cylinder; the multiple transmission components are distributed along the circumference of the feed cylinder, and each transmission component includes multiple spiral protrusions, and the multiple spiral protrusions are distributed in sequence along the vertical direction, and each spiral protrusion is in a spiral shape coaxial with the feed cylinder; the spiral protrusions and the spirally wound steel wire spiral transmission cooperate.

3. A concrete strength testing device according to claim 1, characterized in that: The object-wrapping rack includes a first connecting ring and a plurality of rotating rods, the first connecting ring and the drilling tube are coaxially arranged; the rotating rod is arranged on the upper side of the first connecting ring, the plurality of rotating rods are distributed along the circumference of the first connecting ring, each rotating rod is arranged along the radial direction of the first connecting ring, and the rotating rod can rotate around its own axis; the two ends of the steel wire are respectively a first end and a second end, one end where the plurality of steel wires are connected to each other is the first end, the second end of the steel wire is fixedly arranged on the rotating rod, and the steel wire is wound around the rotating rod.

4. A concrete strength testing device according to claim 1, characterized in that: The two ends of the protective film strip are the third end and the fourth end respectively, and the end at which multiple protective film strips are connected to each other is the third end; a detachable mounting tube is provided on each fixed rod, and the mounting tube can rotate relative to the fixed rod, and the mounting tube and the fixed rod are coaxially arranged; the fourth end of the protective film strip is fixedly arranged on the mounting tube, and the protective film strip is wrapped around the mounting tube.

5. A concrete strength testing device according to claim 3, characterized in that: A first annular groove is provided inside the upper end of the drilling tube, and the first annular groove and the drilling tube are coaxially arranged; a top cover is fixedly provided on the upper end of the feeding tube, a fixed tube is fixedly provided on the top cover, the fixed tube and the feeding tube are coaxially arranged, a second annular groove and a third annular groove are provided on the outer side wall of the fixed tube, the second annular groove and the third annular groove are coaxially arranged with the fixed tube, and the second annular groove is located on the upper side of the third annular groove; The inner side of the first connecting ring is rotatably arranged in the third ring groove; the second connecting ring is fixedly arranged at the lower end of the fixed tube, and the second connecting ring and the fixed tube are coaxially arranged; the inner side of the second connecting ring is rotatably arranged in the second ring groove, and the outer side of the second connecting ring is rotatably arranged in the first ring groove.

6. A concrete strength testing device according to claim 5, characterized in that: A first gear ring is fixedly arranged on the outer peripheral wall of the drilling tube, and a second gear ring is fixedly arranged on the inner peripheral wall of the drilling tube, and the first gear ring and the second gear ring are both coaxially arranged with the drilling tube; a first gear is fixedly arranged on the fixed tube, and the first gear and the fixed tube are coaxially arranged; a plurality of second gears are arranged on the second connecting ring, and the plurality of second gears are distributed along the circumference of the second connecting ring; the axis of each second gear is arranged vertically, and the second gear can rotate around its own axis, and the second gear is meshed with the second gear ring and the first gear; A concrete strength detection device also includes a first driving mechanism, which includes a first motor, the first motor is fixedly arranged on a fixing cylinder, a third gear is fixedly arranged on an output shaft of the first motor, and the third gear is meshed with the first gear ring.

7. A concrete strength testing device according to claim 5, characterized in that: It also includes a second driving mechanism, which includes a second motor, which is fixedly arranged on the lower side of the second connecting ring; a fourth gear is fixedly arranged on the output shaft of the second motor; a third gear ring is fixedly arranged on the upper side of the first connecting ring, the third gear ring and the first connecting ring are coaxially arranged, and the fourth gear is meshed with the third gear ring.

8. A concrete strength testing device according to claim 5, characterized in that: The top cover is fixedly provided with an air jet and an air pump, the air pump is connected with the air jet, an air pipe is provided on the air pump, and the air pipe is communicated with the outside.

9. A concrete strength testing device according to claim 1, characterized in that: The utility model also comprises a frame, on which a guide rod is fixedly arranged, the guide rod is vertically arranged, a fixing arm which can slide up and down is arranged on the guide rod, and a fixing cylinder is fixedly arranged on the fixing arm.

10. A concrete strength testing device according to claim 9, characterized in that: The utility model also comprises a detector, and the detector is used for testing the strength of the sample core.

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