Sampling device for constructional engineering concrete detection

Abstract

The invention discloses a sampling device for constructional engineering concrete detection, and relates to the technical field of concrete detection.The sampling device comprises a mechanism cover and a console arranged on the upper side of the mechanism cover, turning plates are arranged on the front side and the rear side of the mechanism cover, a water inlet pipe is arranged on the outer side of the mechanism cover, and a cutting mechanism is arranged on the inner side of the mechanism cover; the cutting mechanism comprises a first hydraulic telescopic rod, two guide assemblies distributed left and right, a cutting rope guided by the guide assemblies and a conveying assembly driven by the first hydraulic telescopic rod to move up and down, and the conveying assembly is used for circularly conveying the cutting rope. According to the sampling device for constructional engineering concrete detection, the cutting rope is guided by the guide assembly, and meanwhile, a special structure is formed at the bottom of the cutting rope by virtue of the structure of a core sample, so that the root of the core sample can be conveniently cut by the cutting rope, and the core sample can be completely taken out without damage when a concrete layer is relatively thick.

Description

Technical Field

[0001] This invention relates to the field of concrete testing technology, and in particular to a sampling device for testing concrete in building engineering. Background Technology

[0002] Concrete testing sampling in building construction refers to the standardized operation of randomly selecting representative concrete mixtures or solid concrete samples according to the batches, locations, quantities, and methods specified in current national / industry standards throughout the entire process of concrete production, transportation, pouring, and hardening, for laboratory testing or on-site testing to evaluate concrete quality, mix proportion rationality, and structural performance.

[0003] Chinese patent document CN213209547U discloses a concrete sampling device, including a sampling cylinder, a top plate, and partitions. A clamping block is fixedly connected to the side of the top plate, and a through hole is formed within the clamping block. A pressure rod is connected to the through hole, with a pressure block fixedly connected to one end of the pressure rod and a knob fixedly connected to the other end. A positioning hole is formed in the top plate at the end away from the clamping block, and a worm gear moves through the positioning hole. A limit block is fixedly connected to the top of the worm gear. This concrete sampling device uses the clamping block to fix the device to a processing tank. A servo motor drives the worm gear to rotate, thereby achieving synchronous lifting and lowering of the worm gear and four sets of partitions. The four sets of partitions and the sampling cylinder then perform the concrete sampling function. This concrete sampling device can sample the concrete in the processing tank multiple times, improving the accuracy of the test results. The servo motor facilitates control of the sampling process, making it highly practical.

[0004] The existing technology has the following problems: Existing concrete sampling equipment often uses the core drilling method. However, this method requires the drill bit on the equipment to penetrate the concrete layer. If the concrete layer is thick, it is difficult to penetrate and bidirectional drilling is required. However, if there is no space to place the concrete sampling equipment in the opposite direction, a longer drill bit is required. This makes it difficult for existing equipment to deal with thick concrete layers, and the root of the drilled core sample is difficult to separate from the concrete layer. The need to use a longer drill bit may result in the lack of a suitable drill bit on site, or it may be difficult to keep the drill bit stable during drilling. Summary of the Invention

[0005] The main objective of this invention is to provide a sampling device for testing concrete in building engineering, which can effectively solve the problem of difficulty in extracting core samples from thick concrete layers.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A sampling device for concrete testing in building construction includes a mechanism cover and a control console located on the upper side of the mechanism cover. The mechanism cover has flaps on the front and rear sides, a water inlet pipe on the outer side of the mechanism cover, and a cutting mechanism on the inner side of the mechanism cover.

[0007] Preferably, the cutting mechanism includes a first hydraulic telescopic rod, two guide assemblies distributed on the left and right, a cutting rope guided by the guide assemblies, and a conveying assembly driven up and down by the first hydraulic telescopic rod. The conveying assembly is used to circulate the cutting rope. The guide assembly includes a transverse frame, a guide frame, a second guide wheel rotatably connected to the lower side of the guide frame, and a first guide wheel rotatably connected to the upper rear side of the guide frame. The side of the guide frame is slidably connected to the side of the transverse frame away from the first hydraulic telescopic rod. The bottom of the cutting rope is sleeved on the front bottom of the core sample. The cutting rope passes under the second guide wheel, then moves from the side of the first guide wheel away from the first hydraulic telescopic rod to the upper side of the first guide wheel, and finally enters the bottom of the conveying assembly.

[0008] Preferably, an offset frame is slidably connected to the front side of the transverse frame, and mechanism plates are fixedly connected to the left and right sides of the inner side of the mechanism cover. A second hydraulic telescopic rod that drives the transverse frame to move left and right is fixedly connected to the side of the mechanism plate near the first hydraulic telescopic rod. A limit rod is fixedly connected to the front side of the mechanism plate, and a limit slide rail is fixedly connected to the side of the mechanism plate near the first hydraulic telescopic rod. The outer side of the limit rod is slidably connected to the inner side of the limit slide rail. When the transverse frame moves left and right, the offset frame moves back and forth synchronously.

[0009] Preferably, a first water spray bar is fixedly connected to the front side of the offset frame, and a second water spray bar is fixedly connected to the side of the transverse frame and the offset frame away from the first hydraulic telescopic rod. The inner cavity of the water inlet pipe is in communication with the inner cavities of the first water spray bar and the second water spray bar.

[0010] Preferably, a mechanism cylinder is fixedly connected to the inner side of the mechanism cover. The mechanism cylinder is located between two transverse frames and in front of the conveying assembly. A plurality of vertically distributed support assemblies are rotatably connected to the outer side of the mechanism cylinder. The support assembly includes a sliding sleeve fixedly connected to the rear side of the mechanism cylinder and two left and right rotating frames rotatably connected to the rear side of the sliding sleeve. A first support rod is movably sleeved on the inner side of the sliding sleeve, and a second support rod is sleeved in the vertical hole at one end of each of the two rotating frames that are far apart from each other.

[0011] Preferably, a rotating ring is rotatably connected to the outer side of the mechanism cylinder, and a pull rope wrapped around the outer side of the mechanism cylinder is fixedly connected to the upper side of the rotating ring. The movable end of the pull rope is fixedly connected to the side of the transverse frame. A guide ring is fixedly connected to the lower side of the rotating ring, and a top ring is fixedly connected to the outer side of the transverse frame. When the rotating ring rotates, the guide ring pushes the top ring to move. Torsion springs are provided between the rotating ring and the mechanism cylinder, and between the transverse frame and the mechanism cylinder.

[0012] Preferably, a fixing assembly is slidably connected to the inner side of the mechanism cylinder. The fixing assembly includes a pressure plate, two springs fixedly connected to the upper side of the pressure plate, and two pushers at the front and rear. The outer sides of the two pushers are slidably connected to the inner side of the mechanism cylinder, and the lower end of the pusher is fixedly connected to the upper side of the spring.

[0013] Preferably, a lifting assembly is fixedly connected to the inner side of the mechanism cover. The lifting assembly is used to drive the guide frame, the first support rod, the second support rod, and the push platform to move up and down synchronously.

[0014] Preferably, three U-shaped vertical grooves are formed around the core sample, the lower side of the pressure plate overlaps the upper side of the core sample, the outer sides of the first support rod and the second support rod are inserted into the circular hole where the core sample is located, and the first support rod and the second support rod are located on the rear side of the core sample. The guide frame and the second guide wheel are movably sleeved in the vertical grooves located on the left and right sides.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention provides a sampling device for concrete testing in building engineering. Based on the cooperation of a first hydraulic telescopic rod, a guide assembly, a transverse frame, a guide frame, a first guide wheel, a second guide wheel, a cutting rope, a lifting assembly, a mechanism cylinder, a support assembly, a fixing assembly, a pressure plate, a spring, a push table, a first support rod, a second support rod, and a conveying assembly, the cutting rope is guided by the guide assembly. At the same time, relying on the structure of the core sample itself, a special structure is formed at the bottom of the cutting rope, which facilitates the cutting rope to cut the root of the core sample. Thus, even when the concrete layer is thick, the core sample can be extracted completely and without damage.

[0016] 2. This invention provides a sampling device for concrete testing in building engineering. Based on the cooperation of a guide assembly, a transverse frame, a guide frame, a first guide wheel, a second guide wheel, an offset frame, a limiting rod, a limiting slide rail, a mechanism plate, a second hydraulic telescopic rod, a support assembly, a sliding sleeve, a rotating frame, a rotating ring, a guide ring, a pull rope, a first support rod, a second support rod, and a top ring, the transverse frame is moved laterally by the second hydraulic telescopic rod, thereby realizing the forward movement of the limiting rod and the movement of the second support rod, thus adapting to core samples of different sizes and improving the applicability of the device. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the front-view cutting mechanism part of the present invention; Figure 4 This is a three-dimensional structural diagram of the rear-view cutting mechanism of the present invention; Figure 5 This is a three-dimensional structural diagram of the guiding component part of the present invention; Figure 6 This is a three-dimensional structural diagram of the mechanism plate portion of the present invention; Figure 7 This is a three-dimensional structural diagram of the transverse frame portion of the present invention; Figure 8 This is a three-dimensional structural diagram of the mechanism cylinder portion of the present invention; Figure 9 This is a three-dimensional structural diagram of the support component portion of the present invention; Figure 10 This is a three-dimensional structural diagram of the rotating part of the present invention; Figure 11 This is a partial cross-sectional three-dimensional structural diagram of the mechanism cylinder portion of the present invention; Figure 12 This is a three-dimensional structural diagram showing the positions of the functional components during the operation of the present invention; Figure 13 This is a partial cross-sectional three-dimensional structural diagram showing the location of the functional components during the operation of the present invention.

[0018] In the diagram: 1. Mechanism cover; 2. Control console; 3. Flip plate; 4. Water inlet pipe; 5. Cutting mechanism; 51. First hydraulic telescopic rod; 52. Guide assembly; 521. Horizontal movement frame; 522. Guide frame; 523. First guide wheel; 524. Second guide wheel; 525. Offset frame; 526. Limiting rod; 527. Limiting slide rail; 528. Mechanism plate; 529. Second hydraulic telescopic rod; 53. Cutting rope; 5 4. Lifting assembly; 55. Mechanism cylinder; 56. Support assembly; 561. Sliding sleeve; 562. Rotating frame; 563. Rotating ring; 564. Guide ring; 565. Pull rope; 566. Top ring; 57. Fixing assembly; 571. Pressure plate; 572. Spring; 573. Push platform; 58. First water spray nozzle; 59. Second water spray nozzle; 510. First support rod; 511. Second support rod; 512. Conveying assembly. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] Example 1, as Figure 1 , Figure 2As shown, a sampling device for concrete testing in building engineering includes a mechanism cover 1 and a control console 2 located on the upper side of the mechanism cover 1. The control console 2 is used to control the operation of all components inside the device. Push handles are fixedly connected to the left and right sides of the mechanism cover 1. Self-locking rollers are rotatably connected to the lower side of the mechanism cover 1. Flip plates 3 are provided on the front and rear sides of the mechanism cover 1. The bottom of the flip plates 3 is connected to the bottom of the mechanism cover 1. A water inlet pipe 4 is provided on the outer side of the mechanism cover 1. A cutting mechanism 5 is provided on the inner side of the mechanism cover 1.

[0021] It should be noted that the core sample is first obtained by drilling with a drill barrel, then three vertical grooves are cut around the core sample using a disc grooving device, and finally the root of the core sample is cut using the same device to complete the core sample collection.

[0022] Example 2, as Figures 3-7 As shown, the cutting mechanism 5 includes a first hydraulic telescopic rod 51, two guide components 52 distributed on the left and right, a cutting rope 53 guided by the guide components 52, and a conveying component 512 driven to move up and down by the first hydraulic telescopic rod 51. The conveying component 512 is used to circulate the cutting rope 53. The conveying component 512 includes a motor and a conveying wheel. The motor drives the conveying wheel to rotate, thereby driving the cutting rope 53 to circulate on the conveying wheel.

[0023] The guide assembly 52 includes a transverse frame 521, a guide frame 522, a second guide wheel 524 rotatably connected to the lower side of the guide frame 522, and a first guide wheel 523 rotatably connected to the upper rear side of the guide frame 522. The side of the guide frame 522 is slidably connected to the side of the transverse frame 521 away from the first hydraulic telescopic rod 51. The guide frame 522 and the transverse frame 521 can only slide up and down. The bottom of the cutting rope 53 is sleeved on the bottom front side of the core sample. The cutting rope 53 passes through the lower side of the second guide wheel 524, then moves from the side of the first guide wheel 523 away from the first hydraulic telescopic rod 51 to the upper side of the first guide wheel 523, and finally enters the bottom of the conveying assembly 512, which is the lower side of the conveying wheel.

[0024] It should be noted that the conveying component 512 drives the cutting rope 53 to circulate, thereby enabling the cutting rope 53 to cut the root of the core sample. The first hydraulic telescopic rod 51 drives the conveying component 512 to move downward. As the conveying component 512 moves, the length of the cutting rope 53 in front of the second guide wheel 524 decreases, thereby achieving a transverse cut of the root of the core sample by the cutting rope 53. At the same time, the movement of the conveying component 512 and the position of the first guide wheel 523 remain unchanged, thereby achieving a tensioning effect on the cutting rope 53.

[0025] Preferably, an offset frame 525 is slidably connected to the front side of the transverse frame 521. The offset frame 525 can only maintain relative front-to-back movement with the transverse frame 521. The inner left and right sides of the mechanism cover 1 are fixedly connected to the mechanism plate 528. The side of the mechanism plate 528 closest to the first hydraulic telescopic rod 51 is fixedly connected to the second hydraulic telescopic rod 529 that drives the transverse frame 521 to move left and right. The second hydraulic telescopic rod 529 drives the transverse frame 521 to move left and right, thereby adjusting the distance between the two second guide wheels 524, and thus adapting to core samples of different specifications.

[0026] A limiting rod 526 is fixedly connected to the front side of the mechanism plate 528. When the cutting rope 53 is at its highest point, the limiting rod 526 is sleeved on the inner side of the cutting rope 53. The limiting rod 526 and the second guide wheel 524 work together to form a U-shaped structure at the bottom of the cutting rope 53. A limiting slide rail 527 is fixedly connected to the side of the mechanism plate 528 near the first hydraulic telescopic rod 51. The outer side of the limiting rod 526 is slidably connected to the inner side of the limiting slide rail 527. When the transverse frame 521 moves left and right, the offset frame 525 moves back and forth synchronously.

[0027] It should be noted that the second hydraulic telescopic rod 529 drives the transverse frame 521 to move laterally, adjusting the spacing of the guide frame 522. At the same time, the transverse frame 521 drives the offset frame 525 to move. Since the limit rod 526 is synchronously slidably connected to the inner side of the limit slide rail 527, the offset frame 525 moves forward synchronously. Relying on the two second guide wheels 524 and the two limit rods 526, the size of the U-shaped structure at the bottom of the cutting rope 53 is adjusted to adapt to core samples of different specifications.

[0028] Preferably, a first water spray bar 58 is fixedly connected to the front side of the offset frame 525. When the two offset frames 525 are separated from each other, the two first water spray bars 58 are also separated from each other synchronously. A second water spray bar 59 is fixedly connected to the side of the transverse frame 521 and the offset frame 525 away from the first hydraulic telescopic rod 51. When the offset frame 525 and the transverse frame 521 move relative to each other, the two second water spray bars 59 located on the same side are also separated from each other. The first water spray bar 58 and the second water spray bar 59 each contain a plurality of linearly arranged spray holes. The inner cavity of the water inlet pipe 4 is connected to the inner cavities of the first water spray bar 58 and the second water spray bar 59.

[0029] It should be noted that the water pump supplies water to the first water spray outlet 58 and the second water spray outlet 59 through the water inlet pipe 4, and the water sprays to the cutting position through the spray holes on the first water spray outlet 58 and the second water spray outlet 59 to cool down.

[0030] Example 3, as Figures 8-11As shown, a mechanism cylinder 55 is fixedly connected to the inner side of the mechanism cover 1. The mechanism cylinder 55 is located between two transverse frames 521 and is located in front of the conveying assembly 512. If the movable end of the second hydraulic telescopic rod 529 is located on the side of the two transverse frames 521 that are close to each other, then holes for the second hydraulic telescopic rod 529 to pass through are opened on the mechanism cylinder 55 and the transverse frames 521. Several vertically distributed support assemblies 56 are rotatably connected to the outer side of the mechanism cylinder 55. The support assembly 56 includes a sliding sleeve 561 fixedly connected to the rear side of the mechanism cylinder 55 and two left and right rotating frames 562 rotatably connected to the rear side of the sliding sleeve 561. A first support rod 510 is movably sleeved on the inner side of the sliding sleeve 561. A second support rod 511 is sleeved in the vertical hole at the opposite end of the two rotating frames 562.

[0031] Preferably, a rotating ring 563 is rotatably connected to the outer side of the mechanism cylinder 55, and a pull rope 565 is fixedly connected to the upper side of the rotating ring 563 and wound around the outer side of the mechanism cylinder 55. The movable end of the pull rope 565 is fixedly connected to the side of the transverse frame 521. When the two transverse frames 521 move away from each other, they will pull the pull rope 565, causing the pull rope 565 to drive the rotating ring 563 to rotate.

[0032] A guide ring 564 is fixedly connected to the lower side of the rotating ring 563, and a top ring 566 is fixedly connected to the outer side of the rotating frame 562. When the rotating ring 563 rotates, the guide ring 564 pushes the top ring 566 to move. When the rotating ring 563 rotates, it will drive the guide ring 564 to rotate. Torsion springs are provided between the rotating ring 563 and the mechanism cylinder 55, and between the rotating frame 562 and the mechanism cylinder 55. The torsion springs will drive the rotating ring 563 and the rotating frame 562 to reset.

[0033] Preferably, a fixing component 57 is slidably connected to the inner side of the mechanism cylinder 55. The fixing component 57 includes a pressure plate 571, two springs 572 fixedly connected to the upper side of the pressure plate 571, and two pushers 573 at the front and rear. A rubber pad is fixedly connected to the lower side of the pressure plate 571 to avoid wear between the core sample and the pressure plate 571. The springs 572 contain a damping structure to reduce the impact of vibration during the cutting process. The outer sides of the two pushers 573 are slidably connected to the inner side of the mechanism cylinder 55, and the lower end of the pushers 573 is fixedly connected to the upper side of the springs 572.

[0034] Preferably, a lifting assembly 54 is fixedly connected to the inner side of the mechanism cover 1. The lifting assembly 54 is composed of multiple hydraulic rods and plates. The hydraulic rods drive the plates to move up and down. The lifting assembly 54 is used to drive the guide frame 522, the first support rod 510, the second support rod 511 and the push table 573 to move up and down synchronously.

[0035] Example 4, as Figure 11 and Figure 12As shown, three U-shaped vertical grooves are opened around the core sample. The lower side of the pressure plate 571 overlaps the upper side of the core sample. The pressure plate 571 is used to stabilize the core sample. The outer sides of the first support rod 510 and the second support rod 511 are inserted into the circular hole where the core sample is located. The first support rod 510 and the second support rod 511 are used to support the core sample and prevent it from swaying back and forth during the cutting process. The first support rod 510 and the second support rod 511 are located on the rear side of the core sample. The guide frame 522 and the second guide wheel 524 are movably sleeved in the vertical grooves located on the left and right sides.

[0036] It should be noted that a core sample is first drilled using a core drill. After drilling, a vertical groove is cut using a disc grooving device. The size of the bottom shape of the cutting rope 53 is adjusted using the limit rod 526 and the second guide wheel 524. The control panel 2 on the front side is opened to assist in manual adjustment. The lifting component 54 drives the cutting rope 53 to move down into the vertical groove. At the same time, the pressure plate 571 fixes the core sample. The first support rod 510 and the second support rod 511 support the core sample. The first hydraulic telescopic rod 51 drives the conveying component 512 to move down, completing the cutting of the root of the core sample.

[0037] The working principle of this invention is as follows: First, the conveying assembly 512 drives the cutting rope 53 to circulate, thereby cutting the root of the core sample. The first hydraulic telescopic rod 51 drives the conveying assembly 512 to move downward. As the conveying assembly 512 moves, the length of the cutting rope 53 in front of the second guide wheel 524 decreases, thus achieving a transverse cut of the core sample root by the cutting rope 53. Simultaneously, the movement of the conveying assembly 512 and the position of the first guide wheel 523 remain unchanged, thereby achieving a tensioning effect on the cutting rope 53. Through the guidance of the guide assembly 52, the cutting rope 53 is guided, and relying on the structure of the core sample itself, a special structure is formed at the bottom of the cutting rope 53, which facilitates the cutting of the core sample root by the cutting rope 53. Thus, even when the concrete layer is thick, the core sample can be removed completely and without damage. Finally, the second hydraulic telescopic rod 51... 29 drives the transverse frame 521 to move laterally, adjusting the spacing of the guide frame 522. At the same time, the transverse frame 521 drives the offset frame 525 to move. Since the limit rod 526 is synchronously slidably connected to the inner side of the limit slide rail 527, the offset frame 525 moves forward synchronously. Relying on the two second guide wheels 524 and the two limit rods 526, the size of the U-shaped structure at the bottom of the cutting rope 53 is adjusted to accommodate core samples of different specifications. When the two transverse frames 521 move away from each other, they will pull the pull rope 565, causing the pull rope 565 to drive the rotating ring 563 to rotate. When the rotating ring 563 rotates, it will drive the guide ring 564 to rotate. The second hydraulic telescopic rod 529 drives the transverse frame 521 to move laterally, thereby realizing the forward movement of the limit rod 526 and the movement of the second support rod 511, thus accommodating core samples of different sizes and improving the applicability of the equipment.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A sampling device for concrete testing in building construction, comprising a mechanism cover (1) and a control console (2) disposed on the upper side of the mechanism cover (1), wherein flaps (3) are provided on the front and rear sides of the mechanism cover (1), and a water inlet pipe (4) is provided on the outer side of the mechanism cover (1), characterized in that: The inner side of the mechanism cover (1) is provided with a cutting mechanism (5).

2. The sampling device for concrete testing in building engineering according to claim 1, characterized in that: The cutting mechanism (5) includes a first hydraulic telescopic rod (51), two guide assemblies (52) distributed on the left and right, a cutting rope (53) guided by the guide assemblies (52), and a conveying assembly (512) driven to move up and down by the first hydraulic telescopic rod (51). The conveying assembly (512) is used to circulate the cutting rope (53). The guide assembly (52) includes a transverse frame (521), a guide frame (522), a second guide wheel (524) rotatably connected to the lower side of the guide frame (522), and a rotatably connected... The first guide wheel (523) is located on the upper rear side of the guide frame (522). The side of the guide frame (522) is slidably connected to the side of the transverse frame (521) away from the first hydraulic telescopic rod (51). The bottom of the cutting rope (53) is sleeved on the bottom front side of the core sample. The cutting rope (53) passes through the lower side of the second guide wheel (524), and then moves from the side of the first guide wheel (523) away from the first hydraulic telescopic rod (51) to the upper side of the first guide wheel (523), and finally enters the bottom of the conveying assembly (512).

3. A sampling device for concrete testing in building engineering according to claim 2, characterized in that: The front side of the transverse frame (521) is slidably connected to the offset frame (525). The left and right sides of the inner side of the mechanism cover (1) are fixedly connected to the mechanism plate (528). The side of the mechanism plate (528) near the first hydraulic telescopic rod (51) is fixedly connected to the second hydraulic telescopic rod (529) that drives the transverse frame (521) to move left and right. The front side of the mechanism plate (528) is fixedly connected to the limit rod (526). The side of the mechanism plate (528) near the first hydraulic telescopic rod (51) is fixedly connected to the limit slide rail (527). The outer side of the limit rod (526) is slidably connected to the inner side of the limit slide rail (527). When the transverse frame (521) moves left and right, the offset frame (525) moves back and forth synchronously.

4. A sampling device for concrete testing in building engineering according to claim 3, characterized in that: The front side of the offset frame (525) is fixedly connected to the first water spray bar (58), and the side of the transverse frame (521) and the offset frame (525) away from the first hydraulic telescopic rod (51) are both fixedly connected to the second water spray bar (59). The inner cavity of the water inlet pipe (4) is connected to the inner cavities of the first water spray bar (58) and the second water spray bar (59).

5. A sampling device for concrete testing in building engineering according to claim 2, characterized in that: The inner side of the mechanism cover (1) is fixedly connected to the mechanism cylinder (55), which is located between two transverse frames (521) and in front of the conveying assembly (512). The outer side of the mechanism cylinder (55) is rotatably connected to several vertically distributed support assemblies (56). The support assembly (56) includes a sliding sleeve (561) fixedly connected to the rear side of the mechanism cylinder (55) and two left and right rotating frames (562) rotatably connected to the rear side of the sliding sleeve (561). The inner side of the sliding sleeve (561) is movably sleeved with a first support rod (510), and the two rotating frames (562) are each sleeved with a second support rod (511) in the vertical hole at one end away from each other.

6. A sampling device for concrete testing in building engineering according to claim 5, characterized in that: A rotating ring (563) is rotatably connected to the outer side of the mechanism cylinder (55). A pull rope (565) wrapped around the outer side of the mechanism cylinder (55) is fixedly connected to the upper side of the rotating ring (563). The movable end of the pull rope (565) is fixedly connected to the side of the transverse frame (521). A guide ring (564) is fixedly connected to the lower side of the rotating ring (563). A top ring (566) is fixedly connected to the outer side of the rotating frame (562). When the rotating ring (563) rotates, the guide ring (564) pushes the top ring (566) to move. Torsion springs are provided between the rotating ring (563) and the mechanism cylinder (55) and between the rotating frame (562) and the mechanism cylinder (55).

7. A sampling device for concrete testing in building engineering according to claim 6, characterized in that: The inner side of the mechanism cylinder (55) is slidably connected to a fixing component (57). The fixing component (57) includes a pressure plate (571), two springs (572) fixedly connected to the upper side of the pressure plate (571), and two pushers (573) at the front and rear. The outer sides of the two pushers (573) are slidably connected to the inner side of the mechanism cylinder (55), and the lower end of the pusher (573) is fixedly connected to the upper side of the spring (572).

8. A sampling device for concrete testing in building engineering according to claim 7, characterized in that: The inner side of the mechanism cover (1) is fixedly connected to a lifting assembly (54), which is used to drive the guide frame (522), the first support rod (510), the second support rod (511) and the push platform (573) to move up and down synchronously.

9. A sampling device for concrete testing in building engineering according to claim 8, characterized in that: Three U-shaped vertical grooves are opened around the core sample. The lower side of the pressure plate (571) overlaps the upper side of the core sample. The outer sides of the first support rod (510) and the second support rod (511) are inserted into the circular hole where the core sample is located. The first support rod (510) and the second support rod (511) are located on the rear side of the core sample. The guide frame (522) and the second guide wheel (524) are movably sleeved in the vertical grooves located on the left and right sides.

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