A reinforcing bar sampling and cutting device for engineering testing

Abstract

The utility model relates to the technical field of building engineering, disclose a kind of steel bar sampling cutting device for engineering detection, including cutting rack, rotating frame being rotatably connected in the surface of cutting rack and cutting blade being installed on rotating frame and being driven by motor, the side surface of rotating frame is fixedly connected with n type handle, cutting groove is opened in the workbench of cutting rack, the workbench of cutting rack and the both sides of cutting groove are fixedly connected with lower clamping seat, the upper surface of lower clamping seat is attached with upper clamping seat, buffer assembly is installed in the junction of lower clamping seat and upper clamping seat.The utility model is with the aid of innovative buffer assembly and air pressure auxiliary structure, simplifies steel bar clamping process, solves the efficiency problem caused by repeated operation bolt of traditional clamp, staff can quickly put in steel bar by pulling pull ring, it is not necessary to loosen bolt to adjust cutting position, it is not necessary to disassemble clamping structure to continuously cut the same steel bar, and the steel bar sampling efficiency of engineering detection is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and more specifically to a steel bar sampling and cutting device for engineering testing. Background Technology

[0002] The steel bar sampling and cutting device for engineering testing is a specialized piece of equipment in the field of construction engineering for testing the mechanical properties of steel bars. Its application scenarios directly serve key testing items such as tensile strength, bending strength, and impact testing. The core value of this device lies in its ability to accurately cut standard samples that fully meet the requirements of national standards from the steel bars in use or batches of steel bars to be tested at the construction site. This process is a prerequisite for ensuring the accuracy and representativeness of subsequent mechanical property test data.

[0003] In the sampling process for rebar testing, cutting rebar is a common operation. The stability and accuracy of the cutting process directly affect the quality of the sample. To meet this requirement, traditional cutting equipment usually uses clamps to fix the rebar to the cutting table before cutting. However, traditional clamps generally adopt a fixing structure of double clamps + bolts or multiple bolts (such as the fixing method disclosed in the patent with publication number CN220574613U). This design leads to obvious shortcomings in the operation process: before fixing the rebar, the two clamps must be separated by adjusting the bolts to insert the rebar; after fixing, the bolts must be operated again to tighten the clamps; if multiple samples need to be cut continuously on the same rebar, the steps of "loosening the clamp - adjusting the position of the rebar - tightening again" must be repeated after each cut. A lot of time is wasted on the repeated operation of the clamps, which significantly reduces the overall sampling efficiency. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a steel bar sampling and cutting device for engineering testing, so as to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: a steel bar sampling and cutting device for engineering testing, comprising a cutting frame, a rotating frame rotatably connected to the surface of the cutting frame, and a cutting blade mounted on the rotating frame and driven by a motor. An n-shaped handle is fixedly connected to the side of the rotating frame. A cutting groove is formed on the worktable of the cutting frame. Lower clamping seats are fixedly connected to both sides of the worktable of the cutting frame located at the cutting groove. An upper clamping seat is attached to the upper surface of the lower clamping seat. A buffer assembly is installed at the connection between the lower and upper clamping seats. Grooves are formed on the opposite surfaces of the lower and upper clamping seats. Observation plates are embedded and fixedly connected to both sides of the upper clamping seat. Sliding grooves are equidistantly formed on the top of the lower clamping seat. An air passage pipe and an air inlet pipe are fixedly connected to the bottom of the lower clamping seat. A DC one-way valve is installed at the input end of the air inlet pipe.

[0006] Furthermore, the buffer assembly includes a sealing plate that is longitudinally and slidably connected inside the groove. The buffer assembly is internally threaded with an external threaded ring. An internal threaded tube is fixedly connected to the top center of the sealing plate. A spring is movably sleeved on the outer surface of the internal threaded tube. The top of the spring abuts against the bottom of the external threaded ring, and the bottom of the spring abuts against the surface of the sealing plate. A fixed bearing is fixedly installed inside the upper clamping seat. A bolt is fixedly connected to the inner ring of the fixed bearing. The outer surface of the bolt is threaded into the inside of the internal threaded tube.

[0007] Furthermore, an anti-slip strip is fixedly connected to the inner wall of the groove, and a pull ring is fixedly connected to the top center of the upper clamping seat. The pull ring is semi-circular, and the anti-slip strip is arc-shaped.

[0008] Furthermore, under normal conditions, the elasticity of the spring causes the sealing plate to slide downwards along the internally threaded tube, and the top of the bolt extends to the upper surface of the upper clamping seat.

[0009] Furthermore, the observation plate is a transparent acrylic plate, and the outer surface of the internally threaded tube is provided with scale lines.

[0010] Furthermore, external air is connected to the bottom of the slide groove through a DC one-way valve and an air inlet pipe. The diameter of the air inlet pipe is much smaller than that of the air inlet pipe. The sealing plate is square, the upper half of the slide groove is circular, and the lower half of the slide groove is square. The circular section is provided with threads that match the external threaded ring, and the square section matches the sealing plate.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. This utility model, through innovative buffer components and pneumatic auxiliary structures, significantly simplifies the rebar clamping process and effectively solves the efficiency problem of repeated bolt manipulation in traditional clamps. In actual use, the operator only needs to hook the pull ring and pull the upper clamping seat upwards to quickly insert the rebar using the negative pressure space generated by the sliding of the sealing plate. After releasing the pull ring, the air in the groove is slowly discharged through the narrow-diameter air pipe, which allows sufficient time for adjusting the rebar cutting position without the need for repeated bolt tightening and loosening. At the same time, for scenarios where multiple samples are cut from the same rebar, there is no need to disassemble the clamping structure after each cut. Only a slight adjustment of the rebar position is needed after a single cut before proceeding to the next round of clamping, significantly reducing operation steps and time consumption, and greatly improving the efficiency of rebar sampling in engineering testing.

[0013] 2. The design of this utility model device in terms of clamping stability and specification adaptability provides dual protection for the accuracy of rebar sampling. On the one hand, the inner walls of the grooves of the lower and upper clamping seats are equipped with arc-shaped anti-slip strips, which can tightly engage with the external threads of the rebar during clamping. Combined with the continuous clamping force provided by the spring, it can effectively prevent the rebar from shifting laterally during cutting, ensuring a flat cut section that meets the accuracy requirements of mechanical property testing. On the other hand, the clamping force can be adjusted by turning the bolt with a wrench: turning the bolt counterclockwise will drive the internal threaded tube to compress the spring, increasing the clamping force to adapt to rebars with larger diameters or higher hardness, while turning it counterclockwise will decrease the clamping force to adapt to smaller diameter rebars. In addition, the transparent acrylic observation plates on both sides of the upper clamping seat can clearly observe the scale lines on the outer surface of the internal threaded tube, helping the staff to ensure uniform clamping force at all angles and avoid rebar deformation caused by uneven clamping force, further ensuring the accuracy of subsequent test data. At the same time, it achieves flexible adaptation to rebars of different specifications, expanding the applicability of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram showing the connection between the lower clamping seat and the upper clamping seat in this utility model;

[0016] Figure 3 for Figure 2 A longitudinal sectional view;

[0017] Figure 4 This is a schematic diagram of the buffer assembly in this utility model;

[0018] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0019] The attached diagram is labeled as follows: 1. Cutting frame; 2. Rotating frame; 3. Cutting blade; 31. Cutting groove; 4. N-type handle; 5. Lower clamping seat; 6. Upper clamping seat; 61. Observation plate; 7. Groove; 8. Anti-slip strip; 9. Pull ring; 10. Buffer assembly; 101. Sealing plate; 102. Internally threaded pipe; 103. Externally threaded ring; 104. Spring; 105. Fixed bearing; 106. Bolt; 11. Slide groove; 12. Air passage pipe; 13. Air inlet pipe; 14. DC one-way valve. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0021] Figures 1-5 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-5 The present invention will be further described below.

[0022] A steel bar sampling and cutting device for engineering testing includes a cutting frame 1, a rotating frame 2 rotatably connected to the surface of the cutting frame 1, and a cutting blade 3 mounted on the rotating frame 2 and driven by a motor. An n-shaped handle 4 is fixedly connected to the side of the rotating frame 2. A cutting groove 31 is provided on the worktable of the cutting frame 1. Lower clamping seats 5 are fixedly connected to both sides of the worktable of the cutting frame 1 located at the cutting groove 31. An upper clamping seat 6 is attached to the upper surface of the lower clamping seat 5. A buffer assembly 10 is installed at the connection between the lower clamping seat 5 and the upper clamping seat 6. Grooves 7 are provided on the opposite surfaces of the lower clamping seat 5 and the upper clamping seat 6. Observation plates 61 are embedded and fixedly connected to both sides of the upper clamping seat 6. Sliding grooves 11 are provided at equal intervals on the top of the lower clamping seat 5. An air passage pipe 12 and an air inlet pipe 13 are fixedly connected to the bottom of the lower clamping seat 5. A DC one-way valve 14 is installed at the input end of the air inlet pipe 13.

[0023] In this implementation plan, the n-shaped handle 4 is ergonomically designed, allowing for more even force application when gripping it. Pressing down on the rotating frame 2 to drive the cutting blade 3 to cut the steel bars is less strenuous and reduces hand fatigue during long-term operation. The cutting groove 31 can accurately accommodate the cutting blade 3, preventing damage caused by the blade colliding with the workbench during cutting. It also prevents cutting debris from splashing onto the workbench surface and being difficult to clean, ensuring the service life of the equipment and a clean operating environment.

[0024] The symmetrically distributed lower clamping seats 5 on both sides of the cutting groove 31 ensure that the reinforcing bar is always placed directly below the cutting blade 3, avoiding deviation in the length of the cut sample due to offset of the clamping position, and providing a basic guarantee for the consistency of the specifications of the test sample in subsequent testing; the close fit design of the upper clamping seat 6 and the lower clamping seat 5 can reduce the gap between the two and reduce the probability of the reinforcing bar shaking during the clamping process.

[0025] Specifically, the buffer assembly 10 includes a sealing plate 101 that is longitudinally and slidably connected inside the slide groove 11. An external threaded ring 103 is threadedly connected inside the buffer assembly 10. An internal threaded tube 102 is fixedly connected to the top center of the sealing plate 101. A spring 104 is movably sleeved on the outer surface of the internal threaded tube 102. The top of the spring 104 abuts against the bottom of the external threaded ring 103, and the bottom of the spring 104 abuts against the surface of the sealing plate 101. A fixed bearing 105 is fixedly installed inside the upper clamping seat 6. A bolt 106 is fixedly connected to the inner ring of the fixed bearing 105. The outer surface of the bolt 106 is threadedly connected to the inside of the internal threaded tube 102.

[0026] In this embodiment, the elasticity of the spring 104 provides basic pressure for clamping. In conjunction with the threaded engagement structure between the bolt 106 and the internally threaded tube 102, rotating the bolt 106 can change the compression degree of the spring 104, thereby precisely adjusting the clamping force. This can meet the clamping requirements of steel bars of different diameters, and avoid deformation of the steel bars due to excessive force or cutting displacement due to insufficient force. The externally threaded ring 103, through its threaded connection with the circular section of the slide groove 11, can fix the top position of the spring 104, preventing the spring 104 from shifting laterally during long-term use and ensuring the overall structural stability of the buffer assembly 10.

[0027] The fixed bearing 105 ensures that the bolt 106 can only rotate around its own axis, preventing the bolt 106 from rotating synchronously with the upper clamping seat 6. This ensures that the upper clamping seat 6 remains parallel to the lower clamping seat 5, and that the reinforcing bar is subjected to uniform force during clamping. The matching design of the sealing plate 101 and the square section of the slide groove 11 restricts the rotational freedom of the sealing plate 101, allowing the sealing plate 101 to slide only longitudinally along the slide groove 11. This ensures the verticality of the upper clamping seat 6 when the internal threaded tube 102 moves up and down, preventing the upper clamping seat 6 from tilting and causing clamping failure.

[0028] Specifically, an anti-slip strip 8 is fixedly connected to the inner wall of the groove 7, and a pull ring 9 is fixedly connected to the top center of the upper clamping seat 6. The pull ring 9 is semi-circular, and the anti-slip strip 8 is arc-shaped.

[0029] In this embodiment, the arc-shaped anti-slip strip 8 fits the external thread structure of the rebar. When clamped, the anti-slip strip 8 can be embedded in the thread gap of the rebar, increasing the friction between the two and effectively preventing the rebar from sliding laterally due to the high-speed rotating cutting blade 3 during the cutting process, ensuring a flat cutting section. The arc-shaped design of the groove 7 can be adapted to round rebars of different diameters. It can meet the clamping requirements of various specifications of rebars without changing the clamping parts, thus improving the versatility of the device.

[0030] The semi-circular pull ring 9 makes it easy for staff to hook and pull with their fingers. Compared with the traditional clamps that require the use of tools 106 bolts, the upper clamping seat 6 can be raised and lowered simply by manually pulling the pull ring 9, simplifying the clamping operation steps. Especially in continuous sampling scenarios, it can significantly reduce clamping adjustment time.

[0031] Specifically, under normal conditions, the elasticity of the spring 104 causes the sealing plate 101 to slide downwards along the internal threaded tube 102, and the top of the bolt 106 extends to the upper surface of the upper clamping seat 6.

[0032] In this implementation scheme, under normal conditions, the elastic force of the spring 104 causes the sealing plate 101 to drive the internally threaded tube 102 to slide down. At this time, the upper clamping seat 6 and the lower clamping seat 5 remain in contact, preventing the upper clamping seat 6 from sagging due to its own weight when the equipment is idle, thus avoiding damage to the components. At the same time, it ensures that the equipment is always ready for use, reducing the preparation time before starting the machine. The top of the bolt 106 extends to the upper surface of the upper clamping seat 6, making it easy for the operator to directly adjust the clamping force by turning the bolt 106 with a wrench or handwheel without disassembling other parts, which significantly improves the ease of operation.

[0033] The longitudinal elastic force of the spring 104 is transmitted to the upper clamping seat 6 through the sealing plate 101, the internal threaded pipe 102, and the bolt 106, so that the pressure of the upper clamping seat 6 on the reinforcing bar is evenly distributed in the groove 7 area, avoiding excessive local pressure that could damage the surface of the reinforcing bar, and ensuring that the reinforcing bar maintains a stable clamping state during the cutting process, reducing cutting deviations caused by uneven force.

[0034] Specifically, the observation plate 61 is a transparent acrylic plate, and the outer surface of the internally threaded tube 102 is provided with scale lines.

[0035] In this implementation scheme, the transparent acrylic observation plate 61 has good light transmittance, allowing staff to directly observe the positional changes of the internally threaded tube 102 and monitor the clamping force adjustment in real time, avoiding blindly rotating the bolt 106 which could lead to insufficient or excessive clamping force. The scale lines on the surface of the internally threaded tube 102 provide a quantitative basis for clamping force adjustment. Different scales correspond to different spring 104 compression amounts, allowing staff to quickly adjust to the corresponding scale according to the rebar specifications, ensuring consistent clamping force each time and improving the repeatability and accuracy of sample testing data.

[0036] The wear condition of the internal components of the buffer assembly 10 can also be observed through the observation plate 61, such as whether the spring 104 is deformed or whether the sealing plate 101 is leaking. This makes it easier to detect and replace damaged parts in a timely manner, reduce equipment downtime, and ensure the continuity of testing work.

[0037] Specifically, external air is connected to the bottom of the slide 11 through a DC one-way valve 14 and an air inlet pipe 13. The diameter of the air passage pipe 12 is much smaller than the diameter of the air inlet pipe 13. The sealing plate 101 is square, the upper half of the slide 11 is circular, and the lower half of the slide 11 is square. The circular section is provided with threads that match the external threaded ring 103, and the square section matches the sealing plate 101.

[0038] In this implementation scheme, external air enters the bottom of the slide 11 through the DC one-way valve 14 and the air inlet pipe 13. When the upper clamping seat 6 is pulled, the air pressure at the bottom of the slide 11 is quickly replenished, avoiding difficulty in raising and lowering the upper clamping seat 6 due to excessive negative pressure. At the same time, the DC one-way valve 14 can prevent air backflow in the slide 11 and ensure stable air pressure. The diameter of the air passage pipe 12 is much smaller than that of the air inlet pipe 13. When the upper clamping seat 6 is lowered, the air at the bottom of the slide 11 can only be slowly discharged through the air passage pipe 12, allowing the operator sufficient time to adjust the position of the steel bar cutting. There is no need to continuously apply force to fix the upper clamping seat 6 during the clamping process, reducing the difficulty of operation and making it especially suitable for novice operators.

[0039] The tight fit between the square sealing plate 101 and the square section of the slide groove 11 effectively prevents air leakage from the gap between the sealing plate 101 and the slide groove 11, ensuring the stability of the air pressure auxiliary regulation function. The circular design of the upper half of the slide groove 11 is adapted to the threaded connection of the external threaded ring 103, while the square design of the lower half restricts the rotation of the sealing plate 101. The combination of these two structures not only meets the requirements for component installation and fixation but also ensures the sliding accuracy of the sealing plate 101, ensuring the coordination between air pressure regulation and clamping action, and improving the overall operational stability of the device.

[0040] The working principle and usage process of this utility model are as follows: When in use, hook the pull ring 9 with your finger and apply upward pulling force to the upper clamping seat 6. At this time, the pull ring 9 drives the sealing plate 101 to slide upward through the observation plate 61, fixed bearing 105, bolt 106, and internal threaded pipe 102. At this time, the bottom of the slide groove 11 is under negative pressure, and external air enters through the air pipe 12, or through the DC one-way valve 14 via the air inlet pipe 13 to the bottom of the slide groove 11. After the upper clamping seat 6 and lower clamping seat 5 separate, threaded steel is passed through the inside of the groove 7. Then, the threaded steel is inserted using the same operation method. When no external force is applied to the pull ring 9, the elasticity of the spring 104 can drive the sealing plate 101 and the internal threaded pipe 102. The threaded tube 102, bolt 106, fixed bearing 105 and upper clamping seat 6 slide downwards, but the air at the bottom of the slide groove 11 can only be slowly discharged through the air pipe 12. Therefore, the upper clamping seat 6 will slowly descend. So when the threaded steel is placed into the groove 7, there is still a period of time to adjust the cutting position of the threaded steel without applying external force to the pull ring 9. After the air at the bottom of the slide groove 11 is completely discharged through the air pipe 12, the threaded steel is clamped by the upper clamping seat 6 and the lower clamping seat 5. At the same time, the anti-slip strip 8 on the inner wall of the groove 7 engages with the external thread of the threaded rod. Therefore, when the threaded steel is pressed down and cut by the cutting blade 3, the lateral position of the threaded steel can be guaranteed and the fitting accuracy can be improved.

[0041] When cutting threaded steel bars of different specifications, the clamping force between the lower clamping seat 5 and the upper clamping seat 6 also needs to be adjusted. During adjustment, if it is necessary to increase the clamping force, turn the bolt 106 counterclockwise with a wrench. At this time, through the engagement of the bolt 106 with the internal threaded tube 102, the internal threaded tube 102 and the sealing plate 101 can be driven to slide upward. At this time, the spring 104 is in a compressed state, so the clamping force between the upper clamping seat 6 and the lower clamping seat 5 increases. Conversely, turning the bolt 106 counterclockwise can reduce the clamping force between the upper clamping seat 6 and the lower clamping seat 5. The observation plate 61 can observe the sliding position of the internal threaded tube 102 to ensure that the clamping force between the lower clamping seat 5 and the upper clamping seat 6 is the same at all angles.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its scope of protection shall still fall within the protection scope of this utility model.

Claims

1. A steel bar sampling and cutting device for engineering testing, comprising a cutting frame (1), a rotating frame (2) rotatably connected to the surface of the cutting frame (1), and a cutting blade (3) mounted on the rotating frame (2) and driven by a motor, characterized in that: The rotating frame (2) is fixedly connected to an n-shaped handle (4) on its side. The cutting machine frame (1) has a cutting groove (31) on its worktable. The cutting machine frame (1) has a lower clamping seat (5) fixedly connected to both sides of the worktable and the cutting groove (31). The upper surface of the lower clamping seat (5) is fitted with an upper clamping seat (6). A buffer assembly (10) is installed at the connection between the lower clamping seat (5) and the upper clamping seat (6). The opposite surfaces of the lower clamping seat (5) and the upper clamping seat (6) have grooves (7). The two sides of the upper clamping seat (6) are embedded and fixedly connected to observation plates (61). The top of the lower clamping seat (5) has equidistant sliding grooves (11). The bottom of the lower clamping seat (5) is fixedly connected to an air pipe (12) and an air inlet pipe (13). The input end of the air inlet pipe (13) is equipped with a DC one-way valve (14).

2. The steel bar sampling and cutting device for engineering testing according to claim 1, characterized in that: The buffer assembly (10) includes a sealing plate (101) that is longitudinally sealed and slidably connected inside the slide groove (11). The buffer assembly (10) is internally threaded with an external threaded ring (103). An internal threaded tube (102) is fixedly connected to the top center of the sealing plate (101). A spring (104) is movably sleeved on the outer surface of the internal threaded tube (102). The top of the spring (104) abuts against the bottom of the external threaded ring (103), and the bottom of the spring (104) abuts against the surface of the sealing plate (101). A fixed bearing (105) is fixedly installed inside the upper clamping seat (6). A bolt (106) is fixedly connected to the inner ring of the fixed bearing (105). The outer surface of the bolt (106) is threadedly connected to the inside of the internal threaded tube (102).

3. The steel bar sampling and cutting device for engineering testing according to claim 1, characterized in that: The inner wall of the groove (7) is fixedly connected with an anti-slip strip (8), and a pull ring (9) is fixedly connected at the top center of the upper clamping seat (6). The pull ring (9) is semi-circular, and the anti-slip strip (8) is arc-shaped.

4. The steel bar sampling and cutting device for engineering testing according to claim 2, characterized in that: Under normal conditions, the elasticity of the spring (104) causes the sealing plate (101) to slide downwards along the internal threaded tube (102), and the top of the bolt (106) extends to the upper surface of the upper clamping seat (6).

5. A steel bar sampling and cutting device for engineering testing according to claim 2, characterized in that: The observation plate (61) is a transparent acrylic plate, and the outer surface of the internally threaded tube (102) is provided with scale lines.

6. The steel bar sampling and cutting device for engineering testing according to claim 2, characterized in that: External air is connected to the bottom of the slide groove (11) through a DC one-way valve (14) and an air inlet pipe (13). The diameter of the air passage pipe (12) is much smaller than the diameter of the air inlet pipe (13). The sealing plate (101) is square. The upper half of the slide groove (11) is circular. The lower half of the slide groove (11) is square. The circular section is provided with a thread that matches the external threaded ring (103). The square section matches the sealing plate (101).

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