A structural concrete strength detection device for railway construction engineering

Abstract

The application relates to the technical field of railway construction engineering, and discloses a structural concrete strength detection device for railway construction engineering, which comprises a circular top seat, a portal frame fixed on the circular top seat, and a base fixed at the bottom of the portal frame; further comprising: adjusting racks installed at the bottom of the circular top seat, wherein the number of the adjusting racks is multiple groups, the multiple groups of adjusting racks are arranged in an annular array, a sliding groove matched with the adjusting racks is arranged at the bottom of the circular top seat, and sampling units for detecting the structural concrete are fixedly installed at the bottom of the adjusting racks; when the application is used, the multiple groups of first gears are driven to rotate by the first gear ring rotary motion, the relative distance between the multiple groups of adjusting racks is adjusted, the relative distance between the multiple groups of sampling units can also be adjusted, different position core samples and data on the structural concrete can be obtained at the same time, and the diversity of the measurement data is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of railway construction engineering, in particular to a structural concrete strength detection device for railway construction engineering. BACKGROUND

[0002] Concrete is the most commonly used building material in modern society, and the strength of concrete is closely related to the use of buildings. High-strength concrete is beneficial to the completion of buildings and can prolong the service life of buildings. The existing concrete strength detection methods are mostly core drilling methods.

[0003] For example, the publication number CN215339011U discloses a structural concrete strength detection device for railway construction engineering, which comprises two fixed bases, a support block is fixedly connected to the bottom end of each fixed base, a fixed column is fixedly connected to the top end of each fixed base, a connecting plate is arranged between the two fixed columns, a connecting sleeve is fixedly connected to the two ends of the connecting plate, and the two connecting sleeves are respectively slidably sleeved on the corresponding fixed columns. The utility model has the advantages of simple structure, convenient operation, no need to use counterweight, greatly reduced weight of the device, favorable use of the device, and certain protection effect on the drill bit.

[0004] Although the device in the above scheme can realize automatic core drilling sampling detection, it can only core drill and sample a single position on the structural concrete at a time, and cannot flexibly adjust the position distance between different sampling points. When facing large-area or complex-structure concrete strength detection, the device needs to be moved and repositioned multiple times, which not only increases the time cost of detection, but also may affect the accuracy of the detection result due to inaccurate positioning multiple times. SUMMARY

[0005] The present application aims to provide a structural concrete strength detection device for railway construction engineering to solve the problem that only a single position on the structural concrete can be core drilled and sampled, and the position distance between different sampling points cannot be flexibly adjusted.

[0006] In order to achieve the above object, the present application provides the following technical scheme: A structural concrete strength detection device for railway construction engineering, comprising a circular top seat, a gantry fixed on the circular top seat, and a base fixed at the bottom of the gantry; further comprising: an adjusting rack installed at the bottom of the circular top seat, a plurality of groups of adjusting racks arranged in a ring array, a sliding groove adapted to the adjusting rack being formed in the bottom of the circular top seat, a sampling unit for detecting structural concrete being fixedly installed at the bottom of the adjusting rack, a ring-shaped groove being formed in the bottom of the circular top seat, and a multi-point sampling distance adjusting unit being installed in the ring-shaped groove for adjusting the distance between the plurality of groups of sampling units to obtain different position sampling points.

[0007] Preferably, the multi-point sampling distance adjusting unit comprises a gear ring rotatably connected in the ring-shaped groove through a rotary support, a plurality of groups of first gears meshing with the adjusting racks on the outer side of the gear ring, the middle shaft of the first gear being rotatably connected to the circular top seat at one end, the first gear being meshingly connected to the corresponding adjusting rack, and a first driving member being installed on the circular top seat for driving the gear ring to rotate.

[0008] Preferably, the first driving member comprises a first driving rod rotatably connected to the circular top seat, a second gear fixedly sleeved on the first driving rod, the second gear being meshingly connected to the gear ring, and a first rotating block being fixed at the top end of the first driving rod.

[0009] Preferably, the sampling unit comprises a connecting rod fixed at the bottom of the adjusting rack, a connecting seat fixed at the bottom end of the connecting rod, a hollow rod penetrating through the middle part of the connecting seat, a rotating shaft fixed at the top end of the hollow rod, a limiting seat rotatably connected to the outer side of the rotating shaft through a bearing, one end of the limiting seat being slidably sleeved on the connecting rod and the other end being threadedly connected to a lead screw through a screw sleeve, the top of the lead screw being rotatably connected to the bottom of the adjusting rack, a second driving member being provided on the limiting seat for driving the rotating shaft to rotate, a recess being formed in one side of the connecting seat, a first motor being installed in the recess, the output end of the first motor being fixedly connected to the lead screw through a shaft coupling, a detection drill bit assembly being fixedly connected to the bottom end of the hollow rod, and a sample arranging unit being provided between the hollow rod and the detection drill bit assembly.

[0010] Preferably, the second driving member comprises a second motor fixed at the bottom of the limiting seat, a third gear fixed to the output end of the second motor, a fourth gear meshing with one side of the third gear, the fourth gear being fixedly sleeved on the rotating shaft, protective shells being provided on the outer sides of the third gear and the fourth gear, and the bottom of the protective shell being fixed to the limiting seat.

[0011] Preferably, the detection drill bit assembly comprises a center drill rod and a hole drill bit, the hole drill bit is fixed at the bottom of the hollow rod, the center drill rod and the hole drill bit are coaxially distributed, and the center drill rod is fixed inside the hole drill bit, and the length of the center drill rod is greater than the inner depth of the hole drill bit.

[0012] Preferably, the layout unit comprises a threaded rod rotatably connected with the inside of the hollow rod, a moving block is threadedly connected to the outside of the threaded rod, a plurality of thin rods are fixed to one side of the moving block, one end of the thin rods away from the moving block penetrates the hollow rod and the hole drill bit respectively and extends to the inside of the hole drill bit, and a pushing sample block is fixedly connected, a transmission rod is fixed to the top end of the threaded rod, the top end of the transmission rod is rotatably connected with the inner top of the hollow rod through a bearing, and a third driving piece is drivingly connected to one end of the transmission rod.

[0013] Preferably, the third driving piece comprises a driven bevel gear sleeved with the outside of the transmission rod, the driven bevel gear is engaged with a driving bevel gear, a second driving rod is fixed in the middle hole of the driving bevel gear, a fixed block is fixed to the outer wall of the hollow rod, the second driving rod is rotatably connected with the fixed block through a bearing, and a second rotating block is fixed to one end of the second driving rod away from the driving bevel gear and penetrating the inside of the hollow rod and the fixed block.

[0014] Preferably, a chip removal groove is formed in the outside of the hole drill bit, and the chip removal groove is in communication with the inside of the hole drill bit.

[0015] Preferably, two supporting blocks are symmetrically arranged on the top of the base, and a placing groove is formed in the top end of each of the two supporting blocks.

[0016] Compared with the prior art, the beneficial effects of the present application are:

[0017] The present application optimizes the existing structural concrete strength detection device, a plurality of sampling units are designed, and each sampling unit is correspondingly designed with an adjusting rack, in use, the first gear ring rotary motion drives the rotation of a plurality of first gears, thereby adjusting the relative distance between a plurality of adjusting racks, the relative distance between a plurality of sampling units can also be adjusted, such design can satisfy the adjustment of different sampling points and the distance between different sampling points at the same time, so as to obtain core samples and data at different positions of structural concrete at the same time, and improve the diversity of measurement data. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0019] Figure 2 It is a schematic diagram of the local structure of the present application;

[0020] Figure 3 It is a structure schematic view of the multi-point sampling distance adjusting unit of the present application.

[0021] Figure 4 It is a structure schematic view of the sampling unit of the present application.

[0022] Figure 5 It is a structure schematic view of the first driving member of the present application.

[0023] Figure 6 It is a structure schematic view of the drill bit assembly detection device of the present application.

[0024] Figure 7 It is a structure schematic view of the layout unit of the present application.

[0025] Figure 8 It is Figure 7 It is an enlarged view of area A in the figure.

[0026] In the figure: 1, round top seat; 2, gantry; 3, base; 4, adjusting rack; 5, sampling unit; 6, annular groove; 7, multi-point sampling distance adjusting unit; 8, gear ring; 9, first gear; 10, first driving member; 11, first driving rod; 12, second gear; 13, first rotating block; 14, connecting rod; 15, connecting seat; 16, hollow rod; 17, rotating shaft; 18, limiting seat; 19, screw rod; 20, second driving member; 21, first motor; 22, drill bit assembly detection device; 23, layout unit; 24, second motor; 25, third gear; 26, fourth gear; 27, protective shell; 28, center drill rod; 29, hole drill bit; 30, threaded rod; 31, moving block; 32, thin rod; 33, sampling pushing block; 34, transmission rod; 35, third driving member; 36, driving bevel gear; 37, driven bevel gear; 38, second driving rod; 39, fixed block; 40, second rotating block; 41, chip removal groove; 42, supporting block. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] Embodiment one: please refer to Figure 1 and Figure 2The utility model provides a kind of structural concrete strength detection device for railway construction project in the drawing, including circular top seat 1, the circular top seat 1 is fixed with gantry 2, the bottom of the gantry 2 is fixed with base 3;Further include: the adjusting rack 4 installed in the bottom of the circular top seat 1, the adjusting rack 4 is equipped with multiple groups, multiple adjusting rack 4 is annular array distribution, the bottom of the circular top seat 1 is equipped with the sliding groove compatible with the adjusting rack 4, the bottom of the adjusting rack 4 is fixedly installed with the sampling unit 5 for detecting structural concrete, the bottom of the circular top seat 1 is equipped with annular groove 6, the annular groove 6 is installed with the multiple point sampling distance adjusting unit 7 for adjusting the distance between multiple sampling unit 5 to obtain different position sampling point.

[0029] In the scheme, multiple sampling units 5 are designed, and each sampling unit 5 corresponds to an adjusting rack 4, which is driven by the first gear ring 8 to rotate in use, so as to adjust the relative distance between multiple adjusting racks 4, and the relative distance between multiple sampling units 5 can also be adjusted. This design can meet the adjustment of different sampling points and the distance between different sampling points at the same time, and can obtain core samples and data at different positions on the structural concrete, thereby improving the diversity of measurement data.

[0030] Further, referring to Figure 2 and Figure 3 , the multiple point sampling distance adjusting unit 7 includes a gear ring 8 rotatably connected in the annular groove 6 through a rotary support, the outer side of the gear ring 8 is engaged with multiple groups of first gears 9 equal in number to the adjusting racks 4, one end of the central shaft of the first gear 9 is rotatably connected to the circular top seat 1 through a bearing, and the first gear 9 is also engaged with the corresponding adjusting rack 4, and the circular top seat 1 is provided with a first driving member 10 for driving the gear ring 8 to rotate.

[0031] Specifically, the first gear ring 8 is driven by the first driving member 10 to rotate, and the multiple first gears 9 are driven by the first gear ring 8 to rotate at the same speed, thereby adjusting the relative distance between multiple adjusting racks 4, and the relative distance between multiple sampling units 5 can also be adjusted, so that multiple sampling positions can be flexibly changed.

[0032] Further, referring to Figure 2 and Figure 3 , the first driving member 10 includes a first driving rod 11 rotatably connected to the circular top seat 1, the first driving rod 11 is fixedly sleeved with a second gear 12, the second gear 12 is engaged with the gear ring 8, and the top end of the first driving rod 11 is fixedly provided with a first rotating block 13.

[0033] The principle of manually adjusting the rotation of the first ring gear 8: when adjusting, one end of the inner hexagonal wrench is inserted into the key groove at the end of the first rotating block 13, then the inner hexagonal wrench is rotated to drive the first rotating block 13 to rotate, the first rotating block 13 drives the first drive rod 11 to rotate, the first drive rod 11 drives the second gear 12 to rotate, the second gear 12 drives the first ring gear 8 to rotate, and the first ring gear 8 will simultaneously drive multiple sets of first gears 9 to rotate.

[0034] Further, please refer to Figure 4 , the sampling unit 5 comprises a connecting rod 14 fixed at the bottom of the adjusting rack 4, the bottom end of the connecting rod 14 is fixed with a connecting seat 15, the middle part of the connecting seat 15 is provided with a hollow rod 16, the top end of the hollow rod 16 is fixed with a rotating shaft 17, the outer side of the rotating shaft 17 is rotatably connected with a limiting seat 18 through a bearing, one end of the limiting seat 18 is slidably connected with the connecting rod 14, and the other end is threadedly connected with a lead screw 19 through a screw sleeve, the top of the lead screw 19 is rotatably connected with the bottom of the adjusting rack 4, the limiting seat 18 is provided with a second driving member 20 for driving the rotating shaft 17 to rotate, one side of the connecting seat 15 is provided with a recess, and a first motor 21 is installed in the recess, the output end of the first motor 21 is fixedly connected with the lead screw 19 through a shaft coupling, the bottom end of the hollow rod 16 is fixedly connected with a detection drill bit assembly 22, and a sample arranging unit 23 is arranged between the hollow rod 16 and the detection drill bit assembly 22.

[0035] Wherein, refer to Figure 5 , the second driving member 20 comprises a second motor 24 fixed at the bottom of the limiting seat 18, the output end of the second motor 24 is fixed with a third gear 25, one side of the third gear 25 is engaged with a fourth gear 26, the fourth gear 26 is fixedly sleeved with the rotating shaft 17, the outer sides of the third gear 25 and the fourth gear 26 are provided with a protective shell 27, and the bottom of the protective shell 27 is fixed with the limiting seat 18.

[0036] Specifically, the third gear 25 is driven to rotate by the second motor 24, the fourth gear 26 is driven to rotate by the third gear 25, the rotating shaft 17 is driven to rotate by the fourth gear 26, the hollow rod 16 is driven to rotate by the rotating shaft 17, and the detection drill bit assembly 22 at the bottom of the hollow rod 16 is driven to rotate by the hollow rod 16, the first motor 21 drives the lead screw 19 to rotate, the lead screw 19 drives the limiting seat 18 to move downward, and the rotating detection drill bit assembly 22 is close to the surface of the structural concrete, so as to drill core sampling detection on the structural concrete.

[0037] Further, refer to Figure 1The top of the base 3 is symmetrically provided with two supporting blocks 42, and the opposite side of the top end of the two supporting blocks 42 is provided with a placing groove, and the two placing grooves are used for placing the structural concrete block to be detected, so that the concrete block can remain stable during the detection and will not be displaced due to the vibration caused by the core drilling sampling, thereby affecting the accuracy of the detection result.

[0038] When the concrete block is placed, the concrete block needs to be placed stably in the placing groove, and the concrete block is tightly fitted with the bottom and two sides of the placing groove to avoid the existence of gaps to cause shaking during detection. At the same time, the surface of the placing groove is specially treated and has anti-skid texture, which further enhances the stability of the placement of the concrete block.

[0039] In this scheme, the process of core drilling sampling at multiple positions on the structural concrete is carried out;

[0040] Firstly, the structural concrete block to be detected is placed stably in the placing groove of the two supporting blocks 42 on the top of the base 3, and the concrete block is tightly fitted with the bottom and two sides of the placing groove to enhance the stability of the placement of the concrete block by the anti-skid texture on the surface of the placing groove, and to prevent displacement affecting the accuracy of the detection result due to the vibration caused by the core drilling sampling during detection;

[0041] Then, according to the required sampling position distribution, the first rotating block 13 is manually adjusted, the one end of the inner hexagonal wrench is inserted into the key groove at the end of the first rotating block 13, the first rotating block 13 is rotated by rotating the inner hexagonal wrench, the first driving rod 11 is rotated by the first rotating block 13, the second gear 12 is rotated by the first driving rod 11, the first gear ring 8 is rotated by the second gear 12, and the first gear ring 8 simultaneously drives multiple groups of first gears 9 to rotate, thereby adjusting the relative distance between the multiple groups of adjusting racks 4, so that the multiple groups of sampling units 5 reach the predetermined different sampling points;

[0042] Then, the second motor 24 is started, the third gear 25 is rotated by the second motor 24, the fourth gear 26 is rotated by the third gear 25, the fourth gear 26 is rotated by the fourth gear 26, the hollow rod 16 is rotated by the rotating shaft 17, and the detection drill assembly 22 at the bottom of the hollow rod 16 is rotated; at the same time, the first motor 21 is started, the lead screw 19 is rotated by the first motor 21, the limiting seat 18 is moved downward by the lead screw 19, so that the rotating detection drill assembly 22 is close to the surface of the structural concrete, and the structural concrete is core drilled and sampled;

[0043] After the sampling at one position is completed, the first rotating block 13 can be adjusted again according to the need to change the position of the multiple groups of sampling units 5, and the core drilling sampling at other positions of the structural concrete is carried out, so as to obtain the core samples and data at different positions on the structural concrete at the same time, and improve the diversity of the measurement data.

[0044] Example two: please refer toFigure 6 The embodiment is further illustrated based on the first embodiment, and the difference lies in that the structure of the sampling unit 5 is optimized.

[0045] Specifically, the detection drill head assembly 22 comprises a center drill rod 28 and a core drill bit 29, the core drill bit 29 is fixed at the bottom of the hollow rod 16, the center drill rod 28 and the core drill bit 29 are coaxially distributed, and the center drill rod 28 is fixed inside the core drill bit 29, the length of the center drill rod 28 is greater than the inner depth of the core drill bit 29.

[0046] Specifically, when the core sampling is performed, the center drill rod 28 can first contact the structural concrete and perform preliminary drilling, and then the core drill bit 29 continues to penetrate to complete the sampling hole with a larger diameter, so as to obtain a more complete structural concrete core sample. At the same time, since the length of the center drill rod 28 is greater than the inner depth of the core drill bit 29, the inside of the core drill bit 29 can be effectively prevented from being blocked by the concrete during the sampling process, and the sampling work can be smoothly performed.

[0047] During the core sampling process, as the detection drill head assembly 22 rotates and moves downward, the center drill rod 28 first drills a small hole on the surface of the structural concrete to provide guidance for the subsequent penetration of the core drill bit 29. When the core drill bit 29 reaches the predetermined depth, the sampling work is completed, and at this time, the removed concrete core sample can be pushed out from the inside of the core drill bit 29 through the sampling discharge unit 23.

[0048] At the same time, referring to Figure 6 , the outer side of the core drill bit 29 is provided with a chip removal groove 41, which is in communication with the inside of the core drill bit 29. During the core sampling process, the debris generated by the friction between the drill bit and the concrete can be timely discharged through the chip removal groove 41, so as to avoid the accumulation of debris in the inside of the core drill bit 29, which affects the core drilling efficiency and the sampling quality.

[0049] The third embodiment is described with reference to Figure 7 and Figure 8 The embodiment is further illustrated based on other embodiments, and the difference lies in that the structure of the detection drill head assembly 22 is optimized.

[0050] Specifically, the layout unit 23 comprises a threaded rod 30 rotatably connected with the inside of the hollow rod 16, the outside of the threaded rod 30 is threadedly connected with a moving block 31, one side of the moving block 31 is fixedly connected with a plurality of thin rods 32, the ends of the thin rods 32 away from the moving block 31 respectively penetrate the hollow rod 16 and the core drill bit 29 and extend into the inside of the core drill bit 29, and are fixedly connected with a pushing sample block 33, the top end of the threaded rod 30 is fixedly connected with a transmission rod 34, the top end of the transmission rod 34 is rotatably connected with the inner top of the hollow rod 16 through a bearing, one end of the transmission rod 34 is drivingly connected with a third driving piece 35.

[0051] Meanwhile, the third driving piece 35 comprises a driven bevel gear 37 fixedly sleeved with the outside of the transmission rod 34, the driven bevel gear 37 is engaged with a driving bevel gear 36, the middle hole of the driving bevel gear 36 is fixedly connected with a second driving rod 38, the outer wall of the hollow rod 16 is fixedly connected with a fixed block 39, the second driving rod 38 is rotatably connected with the fixed block 39 through a bearing, the end of the second driving rod 38 away from the driving bevel gear 36 respectively penetrates the inside of the hollow rod 16 and the fixed block 39 and is fixedly connected with a second rotating block 40.

[0052] When the concrete core sample needs to be discharged, first, an internal hex wrench is inserted into the key groove of the second rotating block 40, the internal hex wrench is rotated to drive the second rotating block 40 to rotate, the second rotating block 40 drives the second driving rod 38 to rotate, the second driving rod 38 drives the driving bevel gear 36 to rotate, the driving bevel gear 36 drives the driven bevel gear 37 to rotate, the driven bevel gear 37 drives the transmission rod 34 to rotate, the transmission rod 34 drives the threaded rod 30 to rotate, the threaded rod 30 rotates to make the moving block 31 move up and down on the outside thereof, the moving block 31 drives the thin rods 32 to move, the thin rods 32 drive the pushing sample block 33 to move in the inside of the core drill bit 29, so that the concrete core sample in the inside of the core drill bit 29 is pushed out, the layout operation is completed, the concrete core sample taken out can be quickly and effectively discharged, the sampling efficiency is improved, and the situation that the concrete core sample is blocked in the inside of the core drill bit 29 during sampling can be effectively avoided.

[0053] When the threaded rod 30 rotates to drive the moving block 31 to move, the thin rods 32 and the pushing sample block 33 will synchronously act, the pushing sample block 33 can tightly fit the inner wall of the core drill bit 29, the concrete core sample possibly attached or stuck in the drill bit is completely pushed out, the smoothness of the layout is ensured, and the practicability and reliability of the entire detection device are further improved.

[0054] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it should be taken in its broadest possible sense. For example, the terms "a", "an", and "the" include both singular and plural referents unless the context clearly dictates otherwise. The terms "comprises", "comprising", "includes", "including" and the like can be used in conjunction with the term "consisting of to include the elements or steps listed after such conjunctive language, but not to the exclusion of other elements or steps. The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

[0055] While the embodiments of the application have been shown and described herein, it is understood that modifications, substitutions, changes, and alterations can be made by those skilled in the art without departing from the spirit of the application, the scope of which is indicated by the appended claims.

Claims

1. A structural concrete strength testing device for railway construction projects, comprising: A circular top seat (1) is provided, on which a gantry frame (2) is fixed, and at the bottom of the gantry frame (2) is a base (3). Its characteristic is that it further includes: An adjusting rack (4) is installed at the bottom of the circular top seat (1). The number of adjusting racks (4) is provided in multiple sets, and the multiple sets of adjusting racks (4) are arranged in a ring array. The bottom of the circular top seat (1) is provided with a sliding groove that matches the adjusting rack (4). A sampling unit (5) for testing structural concrete is fixedly installed at the bottom of the adjusting rack (4). An annular groove (6) is provided at the bottom of the circular top seat (1). A multi-point sampling distance adjustment unit (7) for adjusting the distance between the multiple sets of sampling units (5) to obtain sampling points at different positions is installed in the annular groove (6). The multi-point sampling adjustment unit (7) includes a gear ring (8) rotatably connected in the annular groove (6) via a slewing bearing. The outer side of the gear ring (8) is meshed with multiple sets of first gears (9) equal in number to the adjusting rack (4). One end of the central shaft of the first gear (9) is rotatably connected to the circular top seat (1) via a bearing. The first gear (9) is also meshed with the corresponding adjusting rack (4). The circular top seat (1) is equipped with a first driving member (10) for driving the gear ring (8) to rotate. The sampling unit (5) includes a connecting rod (14) fixed to the bottom of the adjusting rack (4). A connecting seat (15) is fixed to the bottom end of the connecting rod (14). A hollow rod (16) is provided through the middle of the connecting seat (15). A rotating shaft (17) is fixed to the top end of the hollow rod (16). A limiting seat (18) is rotatably connected to the outside of the rotating shaft (17) through a bearing. One end of the limiting seat (18) is slidably sleeved with the connecting rod (14), and the other end is threadedly connected to a lead screw (19) through a screw sleeve. The top is rotatably connected to the bottom of the adjusting rack (4). The limiting seat (18) is provided with a second driving member (20) for driving the rotating shaft (17) to rotate. A groove is provided on one side of the connecting seat (15). A first motor (21) is installed in the groove. The output end of the first motor (21) is fixedly connected to the lead screw (19) through a coupling. A detection drill bit assembly (22) is fixedly connected to the bottom end of the hollow rod (16). A sorting unit (23) is provided between the hollow rod (16) and the detection drill bit assembly (22).

2. The structural concrete strength testing device for railway construction projects according to claim 1, characterized in that: The first driving member (10) includes a first driving rod (11) rotatably connected to the circular top seat (1), the first driving rod (11) is fixedly sleeved with a second gear (12), the second gear (12) meshes with the gear ring (8), and the top end of the first driving rod (11) is fixed with a first rotating block (13).

3. The structural concrete strength testing device for railway construction projects according to claim 2, characterized in that: The second driving component (20) includes a second motor (24) fixed to the bottom of the limiting seat (18). A third gear (25) is fixed to the output end of the second motor (24). A fourth gear (26) meshes with one side of the third gear (25). The fourth gear (26) is fixedly sleeved with the rotating shaft (17). A protective shell (27) is provided on the outside of the third gear (25) and the fourth gear (26). The bottom of the protective shell (27) is fixed to the limiting seat (18).

4. The structural concrete strength testing device for railway construction projects according to claim 3, characterized in that: The detection drill assembly (22) includes a central drill rod (28) and a hole drill bit (29). The hole drill bit (29) is fixed to the bottom of the hollow rod (16). The central drill rod (28) and the hole drill bit (29) are coaxially distributed, and the central drill rod (28) is fixed inside the hole drill bit (29). The length of the central drill rod (28) is greater than the inner depth of the hole drill bit (29).

5. The structural concrete strength testing device for railway construction projects according to claim 4, characterized in that: The sorting unit (23) includes a threaded rod (30) rotatably connected to the inside of the hollow rod (16). A moving block (31) is threadedly connected to the outside of the threaded rod (30). A plurality of thin rods (32) are fixed on one side of the moving block (31). The end of the thin rod (32) away from the moving block (31) passes through the hollow rod (16) and the drilling bit (29) respectively, and extends into the inside of the drilling bit (29). A pusher block (33) is fixedly connected to it. A transmission rod (34) is fixed to the top of the threaded rod (30). The top of the transmission rod (34) is rotatably connected to the inner top of the hollow rod (16) through a bearing. A third driving member (35) is driven to one end of the transmission rod (34).

6. The structural concrete strength testing device for railway construction projects according to claim 5, characterized in that: The third driving component (35) includes a passive bevel gear (37) fixedly sleeved on the outside of the transmission rod (34). The passive bevel gear (37) meshes with an active bevel gear (36). A second driving rod (38) is fixed inside the central hole of the active bevel gear (36). A fixing block (39) is fixed on the outer wall of the hollow rod (16). The second driving rod (38) is rotatably connected to the fixing block (39) through a bearing. The end of the second driving rod (38) away from the active bevel gear (36) passes through the interior of the hollow rod (16) and the fixing block (39) respectively and is fixed with a second rotating block (40).

7. The structural concrete strength testing device for railway construction projects according to claim 6, characterized in that: The outer side of the drilling bit (29) is provided with a chip removal groove (41), which is connected to the inside of the drilling bit (29).

8. The structural concrete strength testing device for railway construction projects according to claim 1, characterized in that: The base (3) has two symmetrical support blocks (42) on its top, and each of the two support blocks (42) has a placement groove on the opposite side of its top.

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