A sample collection device for testing the physical properties of building materials

Abstract

The present invention relates to the technical field of sample collection, and specifically to a sample collection device for testing the physical properties of building materials, comprising a clamping mechanism for fixedly clamping threaded steel bars, wherein the clamping mechanism is provided with a measuring mechanism for measuring the distance at the joints of the threaded steel bars; the measuring mechanism includes a first scale rod movable on the clamping mechanism, and a second measuring plate is slidably mounted on the first scale rod; a marking mechanism for marking the threaded steel bars is mounted on the second measuring plate; the marking mechanism includes a clamp movable on the second measuring plate. The purpose of the present invention is to provide a sample collection device for testing the physical properties of building materials, which can ensure that the lines drawn by the marking pen are on the same horizontal plane, thereby preventing the lines from being skewed when the staff draws the lines, thereby affecting the cutting. In addition, a continuous line can be drawn, which is helpful for cutting threaded steel bars of standard length, thereby avoiding the three steel bar samples collected being of different lengths, thereby affecting the physical property test results.

Description

Technical Field

[0001] The present invention relates to the technical field of sample collection, in particular to a sample collection device for testing the physical properties of building materials. Background Art

[0002] When testing the physical properties of steel bar welded (lapped) joints, it is necessary to mark the two steel bars at 8 times their diameters, then cut them at the marked points. It is required that at least three bars be collected for each group of samples, and then they are labeled and bundled for physical testing.

[0003] Since the surface of threaded steel bars is in the shape of a thread, it is impossible to mark them into a continuous straight line, which makes it impossible to cut them according to the prescribed standards. Once the three steel bar samples collected are of different lengths, it will affect the physical property test results. Summary of the Invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a sample collection device for testing the physical properties of building materials to solve the problems raised in the above background technology.

[0005] Technical solution: In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: A sample collection device for testing the physical properties of building materials, comprising a clamping mechanism for fixedly clamping threaded steel bars, and a measuring mechanism for measuring the distance at the joints of the threaded steel bars is provided on the clamping mechanism; the measuring mechanism includes a first scale rod that is movable on the clamping mechanism, and a second measuring plate is slidably mounted on the first scale rod; a marking mechanism for marking the threaded steel bars is installed on the second measuring plate; the marking mechanism includes a clamping clamp that is movable on the second measuring plate, and a marking pen is movably mounted on the clamping clamp; an auxiliary mechanism for assisting clear marking is provided on the clamping clamp; the auxiliary mechanism includes a positioning rod with a guiding function, and an extrusion plate is slidably mounted on the positioning rod, the extrusion plate is extruded and connected to the clamping clamp, and one side of the extrusion plate is extruded and connected to the marking pen; the second measuring plate is installed with an inspection mechanism for measuring the welding length of two threaded steel bars.

[0006] Optionally, the clamping mechanism includes a first pillar and a second pillar, and a first electric clamp and a second electric clamp for clamping threaded steel bars are respectively installed on one end of the first pillar, an adjustment plate is fixedly installed on the bottom of the first pillar, and a slider is installed for damping sliding inside the adjustment plate, one end of the slider is fixedly connected to the second pillar, and the first pillar is slidably connected to the second pillar, and the corresponding positions of the first electric clamp and the second electric clamp are provided with measuring mechanisms, marking mechanisms and auxiliary mechanisms with the same structure.

[0007] Optionally, the measuring mechanism also includes a pair of sliding rings sliding on the second pillar and the first pillar, a first measuring plate for being flush with one end of the threaded steel bar is fixedly installed on one side of the pair of sliding rings, the first scale rod is fixedly installed on the first measuring plate, a scale is provided on the outer side of the first scale rod, and the second measuring plate is damped and slides on the first scale rod, and a marking rod perpendicular to the first scale rod is fixedly installed on the second measuring plate.

[0008] Optionally, the marking mechanism further includes a guide groove provided on one side of the second measuring plate, a guide rod with a guiding function being fixedly installed inside the guide groove, one side of the clamping pliers slides inside the guide groove, and one side of the clamping pliers is connected through the guide rod, a first telescopic spring is sleeved on the outer side of the guide rod, one end of the first telescopic spring is fixed to the guide rod, and the other end is fixed to the clamping pliers, and the first telescopic spring is extruded and connected to the clamping pliers.

[0009] Optionally, a limiting groove for auxiliary marking is provided on the surface of the clamping pliers, a connecting rod is installed in the internal damping sliding of the limiting groove, a mounting seat is fixedly installed on the top of the connecting rod, a second telescopic spring is fixedly installed in the interior of the mounting seat, a marking pen is slidably installed in the interior of the mounting seat, and one end of the marking pen is squeezed and connected to the second telescopic spring.

[0010] Optionally, the other end of the marking pen is extruded and connected to an extrusion plate, the extrusion plate is made of rubber, and the cross-sectional area of ​​the extrusion plate is fan-shaped, and the fan-shaped angle of the extrusion plate is 100 degrees to 150 degrees.

[0011] Optionally, the marking pen is located on one side of the marking rod, and the marking pen and the marking rod are in the same horizontal plane.

[0012] Optionally, the positioning rod is fixedly mounted on one side of the bottom of the clamping pliers, and a third telescopic spring is sleeved on the outer side of one end of the positioning rod, a positioning ring is slidably mounted on the outer side of the positioning rod, the positioning ring is extrusion-connected to the third telescopic spring, a connecting seat is fixedly mounted on one side of the positioning ring, a stabilizing rod for pushing the extrusion plate is fixedly mounted on the connecting seat, and the stabilizing rod is plugged into the extrusion plate.

[0013] Optionally, the auxiliary mechanism further includes a baffle fixedly mounted on the marking rod, the baffle being located above the extrusion plate, and the extrusion plate being extrusion-connected to the baffle.

[0014] Optionally, the inspection mechanism includes a guide ring fixedly connected to the marking rod, and a second scale rod is installed on the guide ring for damping sliding. A scale mark is provided on the outer side of the second scale rod, and the second scale rod is located on one side of the first scale rod, and the second scale rod is arranged parallel to the first scale rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention measures the cutting position of the threaded steel bar, determines the position with a marking rod, and then marks the cutting position of the threaded steel bar with a marking pen. The marking pen squeezes the second telescopic spring to ensure that the marking pen is always in contact with the extrusion plate. In addition, the marking pen slides inside the limiting groove through the connecting rod, so that the lines drawn by the marking pen are on the same horizontal plane, avoiding the staff from drawing crooked lines when drawing, which affects the cutting position. At the same time, a continuous line can be drawn, which is helpful to cut threaded steel bars of standard length and avoid the three steel bar samples collected being of different lengths, which affects the physical property test results.

[0017] 2. After measuring the cutting point of one of the threaded steel bars, the present invention can slide the second scale rod, and the second scale rod slides on the guide ring so that one end of the second scale rod is flush with one end of the other threaded steel bar. The length of the threaded steel bar after measurement is subtracted from the length measured by the second scale rod, and the length of the two threaded steel bars welded to each other can be obtained, which can be compared with the remaining steel bar samples. Once the difference in the length of the two threaded steel bars welded to each other is too large, the threaded steel bar sample can be replaced, which can avoid the difference in the length of the two threaded steel bars welded to each other being too large, affecting the test results, thereby improving the accuracy of the physical property detection of the threaded steel bars.

[0018] 3. The present invention places the first measuring plate flush with one end of one of the threaded steel bars, and then slides the second measuring plate on the first scale rod. The cutting position of the threaded steel bar can be measured through the scale mark on the first scale rod. This makes it convenient and accurate to measure the cutting position of the threaded steel knot, avoiding the situation where the worker's hand-held ruler is skewed or not parallel to the threaded steel bar during measurement, resulting in deviation in the measured position. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is the second schematic diagram of the overall structure of the present invention;

[0021] Figure 3 It is a partial cross-sectional view of the present invention;

[0022] Figure 4 It is a partial schematic diagram of the present invention;

[0023] Figure 5 The third schematic diagram of the overall structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the partial structure of the connection between the marking mechanism and the auxiliary mechanism of the present invention;

[0025] Figure 7 For the present invention Figure 6 Enlarged view of part A;

[0026] Figure 8 This is the second schematic diagram of the local structure of the connection between the marking mechanism and the auxiliary mechanism of the present invention;

[0027] Figure 9 For the present invention Figure 8 Enlarged view of part B;

[0028] Figure 10 The welded threaded steel bar structure of the present invention.

[0029] In the figure: 1. Clamping mechanism; 11. First electric clamp; 12. First pillar; 13. Adjustment plate; 14. Second pillar; 15. Second electric clamp; 16. Slider; 2. Measuring mechanism; 21. Sliding ring; 22. First measuring plate; 23. First scale rod; 24. Second measuring plate; 25. Marking rod; 3. Marking mechanism; 31. Clamping clamp; 32. Guide rod; 33. First telescopic spring; 34. Guide groove; 35. Limiting groove; 36. Connecting rod; 37. Mounting seat; 38. Marking pen; 39. Second telescopic spring; 4. Auxiliary mechanism; 41. Extrusion plate; 42. Positioning rod; 43. Third telescopic spring; 44. Positioning ring; 45. Stabilizing rod; 46. Connecting seat; 47. Baffle; 5. Inspection mechanism; 51. Second scale rod; 52. Guide ring. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] The background of the present invention is that two steel bars have been dislocated and welded into a whole steel bar, see Figure 10 The welded joint of two steel bars is a lap joint. The welded lap joint has a certain length. The two welded steel bars are staggered welded. The purpose of the present invention is to cut the two steel bars at 8 times the diameter above and below the welding position, and perform physical property testing after cutting. Therefore, the purpose of the present invention is to clamp the welded steel bars and accurately mark and inspect them at 8 times the diameter, which is convenient for the subsequent cutting operation.

[0032] See also Figures 1 to 9 The present invention provides a sample collection device for testing the physical properties of building materials, comprising a clamping mechanism 1 for fixedly clamping a threaded steel bar, wherein the clamping mechanism 1 is provided with a measuring mechanism 2 for measuring the distance at a joint of the threaded steel bar; the measuring mechanism 2 comprises a first scale rod 23 movable on the clamping mechanism 1, and a second measuring plate 24 is slidably mounted on the first scale rod 23; by adjusting the first scale rod 23 on the clamping mechanism 1 so that the first scale rod 23 is flush with one end of one of the threaded steel bars, and then sliding and adjusting the second measuring plate 24 on the first scale rod 23 so that the second measuring plate 24 slides to eight times the diameter of the threaded steel bar, and then fixing the second measuring plate 24, the length of the threaded steel bar sample can be stably and conveniently measured.

[0033] The second measuring plate 24 is equipped with a marking mechanism 3 for marking the rebar. This mechanism includes a clamp 31 that moves on the second measuring plate 24, with a marking pen 38 movably mounted on the clamp 31. After measuring the length of the rebar sample, the clamp 31 on the second measuring plate 24 secures the welded ends of the rebar. The marking pen 38 on the clamp 31 then draws a continuous line on the extrusion plate 41. This facilitates more standardized cutting and prevents the rebar's thread shape from interfering with the marking, preventing the marking from being a continuous straight line and potentially failing to meet specified cutting standards.

[0034] The clamping jaws 31 are equipped with an auxiliary mechanism 4 that facilitates clear marking. This auxiliary mechanism 4 includes a guiding positioning rod 42, on which a compression plate 41 is slidably mounted. This compression plate 41 is extruded and connected to the clamping jaws 31, and one side of the compression plate 41 is extruded and connected to the marking pen 38. By clamping the compression plate 41 against the rebar, and then squeezing the clamping jaws 31 against the compression plate 41, the clamping jaws 31 can be clamped to the rebar through the compression plate 41. The clamping jaws 31 compresses the compression plate 41, causing the compression plate 41 to engage the rebar. This not only secures the rebar but also conveniently marks a continuous straight line, facilitating the cutting of standard rebar samples.

[0035] The second measuring plate 24 is provided with an inspection mechanism 5 for measuring the weld length of two threaded steel bars. After cutting the threaded steel bar sample, not only can threaded steel bar samples with the same length and specifications be obtained, but the inspection mechanism 5 can also detect the weld length of the two threaded steel bars. Once the weld length difference between the two threaded steel bars is too large, the threaded steel bar sample can be replaced, which can avoid the large weld length difference between the two threaded steel bars affecting the detection result.

[0036] Furthermore, the clamping mechanism 1 includes a first pillar 12 and a second pillar 14. One end of the first pillar 12 and the second pillar 14 are respectively installed with a first electric clamp 11 and a second electric clamp 15 for clamping the threaded steel bar. The bottom of the first pillar 12 is fixedly installed with an adjustment plate 13. The internal damping sliding of the adjustment plate 13 is installed with a slider 16. One end of the slider 16 is fixedly connected to the second pillar 14. The first pillar 12 is slidably connected to the second pillar 14. The first electric clamp 11 and the second electric clamp 15 can respectively clamp the two ends of the welded threaded steel bar. The second support 14 slides inside the adjusting plate 13 through the slider 16, so that the second support 14 and the first support 12 can be dislocated with each other, so that the second support 14 and the first support 12 are parallel but not on the same axis, thereby respectively clamping the two welded threaded steel bars, which is convenient for measurement and stabilizing the two threaded steel bars after cutting. Note: The present invention is aimed at the dislocation welding of two threaded steel bars, so the two ends of the threaded steel bars are dislocated after welding.

[0037] Furthermore, the measuring mechanism 2 further includes a sliding ring 21 that slides on the second support 14. A first measuring plate 22 that is flush with one end of the threaded steel bar is fixedly mounted on one side of the sliding ring 21. A first scale rod 23 is fixedly mounted on the first measuring plate 22. A scale mark is provided on the outer side of the first scale rod 23. A second measuring plate 24 slides damped on the first scale rod 23. A marking rod 25 that is perpendicular to the first scale rod 23 is fixedly mounted on the second measuring plate 24. See the attached Figure 5 A first scale rod 23, mounted on a first measuring plate 22 connected to a sliding ring 21 on the second support 14, is positioned upward, corresponding to the measuring mechanism 2 and marking mechanism 3 on one side of the upper clamping mechanism 1. By aligning the first measuring plate 22 with one end of a welded and clamped rebar located above, the second measuring plate 24 is slid onto the first scale rod 23. The scale markings on the first scale rod 23 allow for the measurement of the rebar's cutting position. This facilitates accurate measurement of the rebar's cutting position, preventing deviations in the measured position caused by a worker holding a measuring ruler that is tilted or not parallel to the rebar during measurement.

[0038] The measuring mechanism 2 also includes a sliding ring 21 that slides on the first pillar 12. A first measuring plate 22 that is flush with one end of the threaded steel bar is fixedly mounted on one side of the sliding ring 21. A first scale rod 23 is fixedly mounted on the first measuring plate 22. A scale mark is provided on the outer side of the first scale rod 23. A second measuring plate 24 slides damped on the first scale rod 23. A marking rod 25 that is perpendicular to the first scale rod 23 is fixedly mounted on the second measuring plate 24. See the attached Figure 5A first scale rod 23, mounted on a first measuring plate 22 connected to a sliding ring 21 on the first support 12, is positioned downwardly, corresponding to the measuring mechanism 2 and marking mechanism 3 on one side of the lower clamping mechanism 1. With the first measuring plate 22 aligned flush with one end of the welded, clamped rebar located below, the second measuring plate 24 is slid onto the first scale rod 23. The scale markings on the first scale rod 23 allow for the measurement of the rebar's cutting position. This facilitates accurate measurement of the rebar's cutting position, preventing deviations in the measured position caused by a worker holding a measuring ruler that is tilted or not parallel to the rebar during measurement.

[0039] Furthermore, the marking mechanism 3 also includes a guide groove 34 provided on one side of the second measuring plate 24. A guide rod 32 with a guiding function is fixedly installed inside the guide groove 34. One side of the clamping pliers 31 slides inside the guide groove 34, and one side of the clamping pliers 31 is connected through the guide rod 32. A first telescopic spring 33 is sleeved on the outer side of the guide rod 32. One end of the first telescopic spring 33 is fixedly connected to the guide rod 32, and the other end is fixedly connected to the clamping pliers 31. The first telescopic spring 33 is connected to the clamping pliers 31. In the initial state, the first telescopic spring 33 is in a natural state. When it is necessary to clamp the threaded steel bar, the clamping pliers 31 is pulled, and the first telescopic spring 33 is in a stretched state. After clamping the threaded steel bar, the clamping pliers 31 moves back under the action of the first telescopic spring 33 to achieve clamping. See the attached Figure 2 The clamping clamps 31 of the upper and lower marking mechanisms are in opposite directions. When clamping the welded threaded steel bar, the clamping clamp 31 at the upper end clamps one end of the threaded steel bar to one side, and the clamping clamp 31 at the lower end clamps the threaded steel bar to the other side. The two interact with each other, and the friction force of the extrusion plate 41 keeps the steel bar clamped and motionless.

[0040] The surface of the clamp 31 is provided with a limiting groove 35 for auxiliary marking. A connecting rod 36 is slidably mounted within the limiting groove 35. A mounting seat 37 is fixedly mounted on the top of the connecting rod 36. A second telescopic spring 39 is fixedly mounted within the mounting seat 37. A marking pen 38 is slidably mounted within the mounting seat 37. One end of the marking pen 38 is compressively connected to the second telescopic spring 39. After measuring the cut portion of the rebar, the clamp 31 is manually pulled in the opposite direction. The first telescopic spring 33 is in a stretched state. The clamp 31 is pulled by the first telescopic spring 33, and slides along the guide rod 32 within the second measuring plate 24. This allows the clamp 31 to clamp the rebar at the location to be cut, preventing the rebar from becoming scattered or collapsing after cutting the welded portion of the two rebars. Note: The upper and lower clamps 31 can respectively clamp the two rebars at a distance of 8 times the diameter of the lap joint. In this way, after cutting, the upper and lower clamps 31 clamp the rebar at the middle weld. In addition, the marking pen 38 can be brought close to the threaded steel bar, the marking pen 38 is located on one side of the marking rod 25, and the marking pen 38 and the marking rod 25 are in the same horizontal plane, so that the position can be determined by the marking rod 25, and then the position of the threaded steel bar cutting can be marked by the marking pen 38. The second telescopic spring 39 is squeezed by the marking pen 38 to ensure that the marking pen 38 is always in contact with the extrusion plate 41. In addition, the marking pen 38 slides inside the limiting groove 35 through the connecting rod 36, so that the line drawn by the marking pen 38 is in the same horizontal plane, avoiding the staff from drawing the line crookedly when drawing, affecting the cutting position.

[0041] Furthermore, the other end of the marking pen 38 is squeezed and connected to the extrusion plate 41. The extrusion plate 41 is made of rubber, and the cross-sectional area of ​​the extrusion plate 41 is fan-shaped, and the fan-shaped angle of the extrusion plate 41 is 190 degrees to 300 degrees. The positioning rod 42 is fixedly installed on the bottom side of the clamping clamp 31, and a third telescopic spring 43 is sleeved on the outer side of one end of the positioning rod 42. A positioning ring 44 is slidably installed on the outer side of the positioning rod 42. The positioning ring 44 is squeezed and connected with the third telescopic spring 43. A connecting seat 46 is fixedly installed on one side of the positioning ring 44. A stabilizing rod 45 for pushing the extrusion plate 41 is fixedly installed on the connecting seat 46. The stabilizing rod 45 is plugged into the extrusion plate 41. The auxiliary mechanism 4 also includes a baffle 47 fixedly installed on the marking rod 25. The baffle 47 is located above the extrusion plate 41, and the extrusion plate 41 is squeezed and connected with the baffle 47. When the clamping clamp 31 approaches the threaded steel bar, the clamping clamp 31 drives the extrusion plate 41 to move. Since the fan-shaped angle of the extrusion plate 41 is 190 degrees to 300 degrees, the extrusion plate 41 can be stuck with the threaded steel bar after contacting and extruding the threaded steel bar. At the same time, the extrusion plate 41 is made of rubber, so that the inner side of the extrusion plate 41 and the threaded steel bar can be squeezed against the threads on the threaded steel bar, so that a part of the extrusion plate 41 is embedded in the depression between the two adjacent threads on the threaded steel bar, thereby increasing the clamping strength of the clamping clamp 31 on the threaded steel bar, and making it convenient for the marking pen 38 to draw lines on the outside of the extrusion plate 41, and a continuous line can be drawn at the same time, which is helpful for cutting threaded steel bars of standard length. In addition, after the cutting is completed, the third telescopic spring 43 can squeeze the positioning ring 44 to slide along the positioning rod 42, and the positioning ring 44 drives the extrusion plate 41 to move, thereby automatically moving the extrusion plate 41 to supplement after the extrusion plate 41 follows the cutting of the threaded steel bar.

[0042] The inspection mechanism 5 is arranged on one side of the upper marking mechanism 3 or on one side of the lower marking mechanism 3, and includes a guide ring 52 fixedly connected to the upper marking rod 25. A second scale rod 51 is installed on the guide ring 52 for damping sliding. A scale mark is provided on the outer side of the second scale rod 51, and the second scale rod 51 is located on one side of the first scale rod 23, and the second scale rod 51 is arranged parallel to the first scale rod 23. After measuring the cutting point of one of the threaded steel bars, the second scale rod 51 can be slid. The second scale rod 51 slides on the guide ring 52 so that one end of the second scale rod 51 is flush with one end of the other threaded steel bar. The length of the threaded steel bar after measurement is subtracted from the length measured by the second scale rod 51 to obtain the length of the two threaded steel bars welded to each other. This can be compared with the other steel bar samples to improve the accuracy of the physical property detection of the threaded steel bars.

[0043] Working principle:

[0044] The first electric clamp 11 and the second electric clamp 15 can respectively clamp the upper and lower ends of the two welded threaded steel bars to prevent the threaded steel bars from scattering or collapsing after cutting the position where the two threaded steel bars are welded to each other. In addition, the second pillar 14 slides inside the adjustment plate 13 through the slider 16, which can achieve the mutual dislocation of the second pillar 14 and the first pillar 12, so that the second pillar 14 is parallel to the first pillar 12 but not on the same axis, thereby respectively clamping the two ends of the welded threaded steel bars.

[0045] The first measuring plate 22 is aligned with one end of one of the welded threaded steel bars, and then the second measuring plate 24 is slid on the first scale rod 23. The cutting position of the threaded steel bar can be measured by the scale mark on the first scale rod 23. This makes it convenient and accurate to measure the cutting position of the threaded steel knot, avoiding the situation where the worker's hand-held ruler is skewed or not parallel to the threaded steel bar during measurement, resulting in deviation in the measured position.

[0046] After measuring the cut portion of the rebar, the clamping jaws 31 are manually pulled. Pulled by the first telescopic spring 33, the clamping jaws 31 slide along the guide rod 32 within the second measuring plate 24, allowing the clamping jaws 31 to clamp the rebar at the cut position. The upper and lower clamping jaws 31 respectively clamp the upper and lower cut ends of the rebar lap weld, preventing the rebar from becoming scattered or collapsing after cutting the welded portion of the two rebars. Furthermore, the marking rod 25 is used to determine the position, and the marking pen 38 is then used to mark the cut position of the rebar. The marking pen 38 slides within the limiting groove 35 via the connecting rod 36.

[0047] When the clamp 31 approaches the threaded steel bar, the clamp 31 drives the extrusion plate 41 to move. Since the fan-shaped angle of the extrusion plate 41 is 190 degrees to 300 degrees, the extrusion plate 41 can be stuck with the threaded steel bar after contacting and extruding the threaded steel bar. At the same time, the extrusion plate 41 is made of rubber, so that the inner side of the extrusion plate 41 and the threaded steel bar can be squeezed against the threads on the threaded steel bar, so that a part of the extrusion plate 41 is embedded in the recess between two adjacent threads on the threaded steel bar, thereby increasing the clamping strength of the clamp 31 on the threaded steel bar, and making it convenient for the marking pen 38 to draw lines on the outside of the extrusion plate 41, and at the same time, a continuous line can be drawn, which helps to cut the threaded steel bar of standard length. In addition, after the cutting is completed, the third telescopic spring 43 can squeeze the positioning ring 44 to slide along the positioning rod 42, and the positioning ring 44 drives the extrusion plate 41 to move. Therefore, after the extrusion plate 41 follows the cutting of the threaded steel bar, the extrusion plate 41 can automatically move to supplement. At the same time, the baffle 47 can limit the movement distance of the extrusion plate 41.

[0048] After measuring the cutting point of one of the threaded steel bars, the second scale rod 51 can be slid. The second scale rod 51 slides on the guide ring 52 so that one end of the second scale rod 51 is flush with one end of the other threaded steel bar. The length measured by the second scale rod 51 is subtracted from the measured length of the threaded steel bar to obtain the length of the two threaded steel bars welded together. This can be compared with other steel bar samples to improve the accuracy of the physical property detection of the threaded steel bars. In addition, the first pillar 12 and the second pillar 14 are also equipped with a measuring mechanism 2, a marking mechanism 3, and an auxiliary mechanism 4, so that two threaded steel bars can be measured and cut simultaneously.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A sample collection device for testing the physical properties of building materials, characterized in that: It comprises a clamping mechanism (1) for fixing and clamping a threaded steel bar, wherein the clamping mechanism (1) is provided with a measuring mechanism (2) for measuring the distance at a joint of the threaded steel bar; The measuring mechanism (2) comprises a first scale rod (23) movable on the clamping mechanism (1), and a second measuring plate (24) is slidably mounted on the first scale rod (23); The second measuring plate (24) is provided with a marking mechanism (3) for marking the threaded steel bar; The marking mechanism (3) comprises a clamp (31) movably arranged on the second measuring plate (24), and a marking pen (38) is movably mounted on the clamp (31); The clamping pliers (31) are provided with an auxiliary mechanism (4) with clear auxiliary markings; The auxiliary mechanism (4) includes a positioning rod (42) with a guiding function, and a pressing plate (41) is slidably mounted on the positioning rod (42). The pressing plate (41) is pressed and connected to the clamping clamp (31), and one side of the pressing plate (41) is pressed and connected to the marking pen (38); The second measuring plate (24) is provided with an inspection mechanism (5) for measuring the welding length of two threaded steel bars; The clamping mechanism (1) comprises a first support (12) and a second support (14); a first electric clamp (11) and a second electric clamp (15) for clamping threaded steel bars are respectively installed at one end of the first support (12) and the second support (14); the first support (12) and the second support (14) are slidably connected; a measuring mechanism (2), a marking mechanism (3) and an auxiliary mechanism (4) of the same structure are provided at the relative position between the first electric clamp (11) and the second electric clamp (15); The measuring mechanism (2) further comprises a pair of sliding rings (21) sliding on the second pillar (14) and the first pillar (12) respectively, a first measuring plate (22) for being flush with one end of the threaded steel bar is fixedly mounted on one side of the pair of sliding rings (21), the first scale rod (23) is fixedly mounted on the first measuring plate (22), and a marking rod (25) perpendicular to the first scale rod (23) is fixedly mounted on the second measuring plate (24); The marking mechanism (3) further comprises a guide groove (34) provided on one side of the second measuring plate (24), a guide rod (32) having a guiding function being fixedly installed inside the guide groove (34), one side of the clamping pliers (31) slides inside the guide groove (34), and one side of the clamping pliers (31) is connected to the guide rod (32) through and through, a first telescopic spring (33) is sleeved on the outer side of the guide rod (32), one end of the first telescopic spring (33) is fixed to the guide rod (32), and the other end is fixed to the clamping pliers (31), and the first telescopic spring (33) is connected to the clamping pliers (31) by compression; The surface of the clamping pliers (31) is provided with a limiting groove (35) for auxiliary marking, a connecting rod (36) is installed in a damping sliding manner inside the limiting groove (35), a mounting seat (37) is fixedly installed on the top of the connecting rod (36), a second telescopic spring (39) is fixedly installed inside the mounting seat (37), a marking pen (38) is installed in a sliding manner inside the mounting seat (37), and one end of the marking pen (38) is squeezed and connected to the second telescopic spring (39); The other end of the marking pen (38) is squeezed and connected to the squeezing plate (41), the squeezing plate (41) is made of rubber, and the cross-sectional area of ​​the squeezing plate (41) is fan-shaped, and the fan-shaped angle of the squeezing plate (41) is 190 degrees to 300 degrees.

2. A sample collection device for testing the physical properties of building materials according to claim 1, characterized in that: The marking pen (38) is located on one side of the marking rod (25), and the marking pen (38) and the marking rod (25) are in the same horizontal plane.

3. A sample collection device for testing the physical properties of building materials according to claim 1, characterized in that: The positioning rod (42) is fixedly mounted on one side of the bottom of the clamping pliers (31), and a third telescopic spring (43) is sleeved on the outer side of one end of the positioning rod (42). A positioning ring (44) is slidably mounted on the outer side of the positioning rod (42), and the positioning ring (44) is extrusion-connected with the third telescopic spring (43). A connecting seat (46) is fixedly mounted on one side of the positioning ring (44), and a stabilizing rod (45) for pushing the extrusion plate (41) is fixedly mounted on the connecting seat (46), and the stabilizing rod (45) is plugged into the extrusion plate (41).

4. A sample collection device for testing the physical properties of building materials according to claim 1, characterized in that: The auxiliary mechanism (4) further comprises a baffle (47) fixedly mounted on the marking rod (25), the baffle (47) being located above the extrusion plate (41), and the extrusion plate (41) and the baffle (47) being extrusion-connected.

5. The sample collection device for testing the physical properties of building materials according to claim 1, characterized in that: The inspection mechanism (5) comprises a guide ring (52) fixedly connected to the marking rod (25), a second scale rod (51) being mounted on the guide ring (52) in a damped sliding manner, a scale mark being provided on the outer side of the second scale rod (51), and the second scale rod (51) being located on one side of the first scale rod (23), and the second scale rod (51) being arranged parallel to the first scale rod (23).

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