Deformed steel bar tensile testing device

Abstract

The invention relates to the technical field of deformed steel bar tensile testing, in particular to a deformed steel bar tensile testing device. Comprising bases, a stretching mechanism is arranged between the two bases, two movable frames are arranged on the stretching mechanism in a threaded mode, the stretching mechanism is used for driving the movable frames to move horizontally, and force sensors are rotationally connected to the movable frames. According to the invention, traditional vertical loading is changed into transverse stretching, so that rust or other impurities on the surface of the deformed steel bar are not easy to fall onto the clamp, the risk of slipping is reduced, and the accuracy of test data is ensured; through cooperation of a fixed shell, a heating furnace, a fixed seat, a first electric push rod and a placement seat, the next deformed steel bar can be heated in advance while the deformed steel bar is tested, so that the heating time of the deformed steel bar is saved, the testing efficiency is improved, and a heating pipe is arranged on the inner side of the fixed shell to form a hot air environment, so that the testing efficiency is improved. The deformed steel bar is kept at a constant temperature in the test process, and the test result is prevented from being influenced by temperature fluctuation.

Description

Technical Field

[0001] The present invention relates to the technical field of threaded steel tensile testing, and in particular to a threaded steel tensile testing device. Background Art

[0002] Rebar is a steel bar with spiral protrusions (threads) on the surface. It is an indispensable basic material in construction projects. It is mainly used in concrete structures to enhance the overall strength and durability of the structure through the bonding force between it and concrete. The quality of rebar is directly related to the safety and service life of the building. Therefore, it is very important to strictly test the various performance indicators of rebar. Tensile testing is one of the important means to evaluate the mechanical properties of rebar. By applying axial tension to the rebar until it breaks, a series of key parameters such as yield strength, tensile strength, elongation, etc. can be obtained. These data are of great significance for evaluating the quality of rebar, ensuring its compliance with relevant standards, and guiding actual engineering applications.

[0003] However, as a key material widely used in construction and structural engineering, the performance of rebar under different temperature conditions is particularly important, especially in some special applications, such as nuclear power plants, petrochemical facilities, etc., rebar may need to withstand high temperature environments. In order to ensure that these materials can still maintain good mechanical properties under extreme conditions, high temperature tensile testing has become a necessary means to evaluate the strength and ductility of rebar within a specific temperature range; Traditional high temperature tensile testing usually uses a resistance heating furnace to heat the sample to the required temperature. After the sample is heated to the specified temperature, the test is carried out, and the subsequent repeated operations can be repeated. However, this method requires waiting for the sample to be heated in practice, which prolongs the entire test cycle and affects work efficiency; and most rebar tensile test devices currently use vertical loading, that is, the sample is suspended vertically and subjected to an upward tensile force. Although this arrangement simplifies the equipment design, it brings additional problems in high temperature testing. Specifically, during the heating process, rust or other impurities attached to the surface of the rebar are easily dropped onto the lower fixture due to vibration or gravity. If these debris are not cleaned up in time, it may cause slippage between the fixture and the sample, thereby affecting the accuracy and reliability of the test results. Summary of the invention

[0004] In view of this, the present invention provides a threaded steel tensile testing device, which can solve the problems that when the threaded steel is subjected to a high-temperature tensile test, it takes a long time to wait for the threaded steel to be heated to a specified temperature, which prolongs the test cycle and affects work efficiency. In addition, when the vertical loading method is used for testing, rust or other impurities attached to the surface of the threaded steel are easily dropped onto the lower end clamp due to vibration or gravity, thereby causing the lower end clamp to slip.

[0005] The technical solution of the present invention is: a threaded steel tensile testing device, comprising a base, a tensile mechanism is arranged between two bases, two movable frames are threadedly arranged on the tensile mechanism, the tensile mechanism is used to drive the movable frame to translate, a force sensor is rotatably connected to the movable frame, a connecting block is connected to the force sensor, a rotating mechanism is arranged on the movable frame, the rotating mechanism is used to drive the force sensor to rotate, a driving mechanism is arranged on the connecting block, a clamp for clamping the threaded steel is arranged on the driving mechanism, a fixed shell is arranged between the two bases, an outlet for the threaded steel to fall out is opened at the bottom of the fixed shell, the two movable frames are slidably penetrated through the fixed shell, a closing mechanism is arranged on the fixed shell, the closing mechanism is used to close the fixed shell, a displacement sensor and a heating furnace are connected to the inner side of the fixed shell, the heating furnace is used to heat the threaded steel, a fixed seat is arranged on the outer side of the fixed shell, a first electric push rod is connected to the fixed seat, a storage seat for placing the threaded steel is connected to the telescopic rod of the first electric push rod, a controller is installed on the side of the fixed seat, and a limiting mechanism for limiting the threaded steel is arranged on the storage seat.

[0006] As a preferred technical solution of the present invention, the stretching mechanism includes a gear box, a first servo motor and a screw rod. The gear boxes are installed on both bases. The first servo motor is arranged on the gear box. The input end of the gear box is connected to the output shaft of the first servo motor. The screw rod is symmetrically rotatably arranged on the base. The screw rod on the base is threadedly connected to the movable frame, and the screw rod is connected to the output end of the gear box.

[0007] As a preferred technical solution of the present invention, the rotating mechanism includes a reduction motor and a gear set. The reduction motor is installed on the movable frame. The gear set is installed between the output shaft of the reduction motor and the force sensor. The gear set is used for transmission between the output shaft of the reduction motor and the force sensor.

[0008] As a preferred technical solution of the present invention, the driving mechanism includes a second electric push rod, a push plate and a movable seat. The second electric push rod is connected to the connecting block, the push plate is connected to the telescopic rod of the second electric push rod, and the movable seat is also symmetrically slidably arranged on the connecting block. The clamp is slidably installed on the movable seat, and the push plate is slidably connected to the movable seat.

[0009] As a preferred technical solution of the present invention, the closing mechanism includes a rotating shell, a third electric push rod and a heating tube. The rotating shell is rotatably arranged on the fixed shell, and the third electric push rod is symmetrically rotatably arranged on the fixed shell. The telescopic rod of the third electric push rod is rotatably connected to the rotating shell. The heating tube is installed at intervals on the inner side of the rotating shell. The heating tube is used to heat and keep the threaded steel in the fixed shell warm.

[0010] As a preferred technical solution of the present invention, the limiting mechanism includes a limiting plate and a first elastic piece. The limiting plate is symmetrically rotatably arranged on the storage seat, and the first elastic piece is connected between the limiting plate and the storage seat.

[0011] As a preferred technical solution of the present invention, it also includes a feeding mechanism, which includes a feeding frame, a cover plate, a distance sensor, a fourth electric push rod and a first baffle. A feeding frame for placing threaded steel bars is installed on the top of the fixed seat, a cover plate is rotatably arranged on the feeding frame, and distance sensors are symmetrically arranged on the sides of the feeding frame. The distance sensors are used to detect the length of the threaded steel bars. A fourth electric push rod is symmetrically arranged on the fixed seat, and a first baffle is slidably arranged on the side of the feeding frame. The first baffle is used to block the threaded steel bars in the feeding frame, and the first baffle is connected to the telescopic rod of the fourth electric push rod.

[0012] As a preferred technical solution of the present invention, it also includes an adjustment mechanism, which includes a visual sensor, a second servo motor and a friction wheel. The visual sensor is installed on the fixed seat, the second servo motor is symmetrically installed on the fixed seat, and the friction wheel is also symmetrically rotatably arranged on the fixed seat. The friction wheel is used to drive the threaded steel to rotate, and the output shaft of the second servo motor is connected to the friction wheel.

[0013] As a preferred technical solution of the present invention, it also includes a discharging mechanism, which includes a second baffle, a second spring piece and a discharging plate. The second baffle is rotatably arranged at the bottom of the fixed shell, a second spring piece is connected between the second baffle and the bottom of the fixed shell, and a discharging plate is connected between the two bases, and the discharging plate is located below the fixed shell.

[0014] Beneficial effects: 1. The present invention changes the traditional vertical loading into lateral stretching, so that rust or other impurities on the surface of the threaded steel are not easy to fall onto the fixture, reducing the risk of slipping and ensuring the accuracy of the test data; and through the cooperation of the fixed shell, the heating furnace, the fixed seat, the first electric push rod and the storage seat, the next threaded steel can be heated in advance while the threaded steel is being tested, thereby saving the heating time of the threaded steel and improving the test efficiency, and a heating pipe is arranged on the inner side of the fixed shell to form a hot air environment, ensuring that the threaded steel maintains a constant temperature during the test and avoiding the test results being affected by temperature fluctuations.

[0015] 2. The present invention realizes automatic loading and unloading of rebar by equipping a feeding mechanism and a discharging mechanism, reduces manual intervention, and improves the safety and consistency of operation.

[0016] 3. The present invention can automatically adjust the position of the threaded steel bar by utilizing an adjustment mechanism composed of a visual sensor and a servo motor to ensure the correct orientation of the transverse ribs, thereby facilitating subsequent clamping operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2It is a three-dimensional structural schematic diagram of the stretching mechanism of the present invention.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the rotating mechanism of the present invention.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the driving mechanism of the present invention.

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the movable frame, the fixed shell and the rotating shell of the present invention.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the fixed shell, the rotating shell and the third electric push rod of the present invention.

[0023] Figure 7 It is a structural separation diagram of the closing mechanism of the present invention.

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the heating furnace of the present invention.

[0025] Fig. 9 It is a three-dimensional structural schematic diagram of the fixing seat, the first electric push rod and the controller of the present invention.

[0026] Fig.10 It is a schematic diagram of the three-dimensional structure of the fixing seat, the first electric push rod and the storage seat of the present invention.

[0027] Fig.11 It is a schematic diagram of the three-dimensional structure of the limiting mechanism of the present invention.

[0028] Fig.12 It is a three-dimensional structural schematic diagram of the feeding mechanism and the adjusting mechanism of the present invention.

[0029] Fig.13 It is a structural separation diagram of the feeding mechanism of the present invention.

[0030] Fig.14 It is a schematic diagram of the three-dimensional structure of the second servo motor and the friction wheel of the present invention.

[0031] Fig.15 It is a schematic diagram of the three-dimensional structure of the base, the fixed shell and the discharge plate of the present invention.

[0032] Fig.16 It is a three-dimensional structural schematic diagram of the discharging mechanism of the present invention.

[0033] Wherein: 1-base, 201-gear box, 202-first servo motor, 203-screw rod, 3-movable frame, 4-force sensor, 5-connecting block, 601-reduction motor, 602-gear set, 701-second electric push rod, 702-push plate, 703-movable seat, 8-clamp, 9-fixed shell, 1001-rotating shell, 1002-third electric push rod, 1003-heating tube, 11-displacement sensor, 12-heating furnace, 13-fixed seat, 14-first electric push rod, 15-storage seat, 16-controller, 1701-limiting plate, 1702-first spring piece, 18-discharging frame, 19-cover plate, 20-distance sensor, 21-fourth electric push rod, 22-first baffle, 23-visual sensor, 24-second servo motor, 25-friction wheel, 26-second baffle, 27-second spring piece, 28-discharging plate. DETAILED DESCRIPTION

[0034] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0035] Embodiment: A threaded steel tensile test device, see Figure 1-Figure 11As shown, it includes a base 1; the number of bases 1 is two, and the two bases 1 are distributed on the left and right; it also includes a stretching mechanism, a movable frame 3, a force sensor 4, a connecting block 5, a rotating mechanism, a driving mechanism, a clamp 8, a fixed shell 9, a closing mechanism, a displacement sensor 11, a heating furnace 12, a fixed seat 13, a first electric push rod 14, a storage seat 15, a controller 16 and a limiting mechanism; a stretching mechanism is arranged between the two bases 1; two movable frames 3 are threadedly arranged on the stretching mechanism, and the stretching mechanism is used to drive the two movable frames 3 to move closer or farther away; the sides of the two movable frames 3 that are close to each other are both rotatably connected to the force sensor 4; the sides of the two force sensors 4 that are close to each other are both connected to the connecting block 5; a rotating mechanism is arranged on the movable frame 3, and the rotating mechanism is used to drive the force sensor 4 to rotate; a driving mechanism is arranged on the connecting block 5, and a clamp 8 for clamping threaded steel is arranged on the driving mechanism through bolts, The number of tools 8 is four; a fixed shell 9 is arranged between the two bases 1, and an outlet for the threaded steel to fall out is opened at the bottom of the fixed shell 9, and the two movable frames 3 slide through the fixed shell 9, and the force sensor 4 and the connecting block 5 are both located on the inner side of the fixed shell 9; a closing mechanism is arranged on the fixed shell 9, and the closing mechanism is used to close the fixed shell 9; a displacement sensor 11 is connected to the rear side of the fixed shell 9; a heating furnace 12 is arranged on the front side of the fixed shell 9, and the heating furnace 12 is used to heat the threaded steel; a fixed seat 13 is arranged on the front side of the fixed shell 9; a first electric push rod 14 is connected to the middle part of the upper front side of the fixed seat 13; a storage seat 15 for placing the threaded steel is connected to the telescopic rod of the first electric push rod 14; a controller 16 is installed on the left front side of the fixed seat 13, and the force sensor 4 and the displacement sensor 11 are electrically connected to the controller 16; a limiting mechanism for limiting the threaded steel is arranged on the storage seat 15.

[0036] See also Figure 1 and Figure 2 As shown, the stretching mechanism includes a gear box 201, a first servo motor 202 and a screw rod 203; the gear box 201 is installed on both bases 1, and the gear box 201 is provided with an input end and two output ends; the first servo motor 202 is provided on the gear box 201, and the input end of the gear box 201 is connected to the output shaft of the first servo motor 202; the screw rod 203 is symmetrically rotated on the upper side of the base 1, the two screw rods 203 on the base 1 are threadedly connected to the movable frame 3, and the two screw rods 203 on the base 1 are respectively connected to the two output ends of the gear box 201.

[0037] See also Figure 3As shown, the rotating mechanism includes a reduction motor 601 and a gear set 602; the reduction motor 601 is installed on the movable frame 3; the gear set 602 is composed of two full gears, and the output shaft of the reduction motor 601 and the outer side of the force sensor 4 are both provided with a full gear, and the two full gears are meshed. The reduction motor 601 drives the force sensor 4 to rotate through the transmission energy of the gear set 602.

[0038] See also Figure 4 As shown, the driving mechanism includes a second electric push rod 701, a push plate 702 and a movable seat 703; the second electric push rod 701 is connected to the middle of the side where the two connecting blocks 5 are close to each other; the push plate 702 is connected to the telescopic rod of the second electric push rod 701; the movable seats 703 are symmetrically slidably arranged on the inner sides of the two connecting blocks 5 up and down, the number of the movable seats 703 is four, and the four clamps 8 are slidably installed on the four movable seats 703 respectively; the push plate 702 is slidably connected to the two movable seats 703 on the same side connecting block 5.

[0039] See also Figure 5-Figure 7 As shown, the closing mechanism includes a rotating shell 1001, a third electric push rod 1002 and a heating tube 1003; the rotating shell 1001 is rotatably arranged on the fixed shell 9; the third electric push rod 1002 is rotatably arranged on the rear side of the fixed shell 9, and the telescopic rods of the two third electric push rods 1002 are rotatably connected to the rotating shell 1001; the heating tube 1003 is installed at intervals on the inner side of the rotating shell 1001, and the heating tube 1003 is used to heat and keep the threaded steel in the fixed shell 9 warm.

[0040] See also Fig.10 and Fig.11 As shown, the limiting mechanism includes a limiting plate 1701 and a first elastic piece 1702 ; the limiting plate 1701 is symmetrically rotated on the storage seat 15 , and the first elastic piece 1702 is connected between the left and right sides of the lower part of the limiting plate 1701 and the storage seat 15 .

[0041] When in use, first control the third electric push rod 1002 to retract, so that the telescopic rod of the third electric push rod 1002 pulls the rotating shell 1001 to rotate and open, and then removes the clamp 8 from the movable seat 703 according to the size of the threaded steel, and then reinstalls the adapted clamp 8 on the movable seat 703 through bolts, and then controls the third electric push rod 1002 to extend, so that the telescopic rod of the third electric push rod 1002 pushes the rotating shell 1001 to reverse and close, and then utilizes the first servo motor 202 to drive the screw rod 203 to rotate or reverse through the gear box 201, thereby driving the two movable frames 3 to move closer or farther away, thereby adjusting the length between the two connecting blocks 5, so that the length between the two connecting blocks 5 is adapted to the length of the threaded steel, and the adjustment is good. Afterwards, the threaded steel is placed in the storage seat 15 (when the threaded steel is placed, the two transverse ribs need to be located at the top and bottom of the threaded steel respectively), and the threaded steel is placed in the fixed seat 13, and then the first electric push rod 14 drives the storage seat 15 and the limit plate 1701 to move backward, so that the storage seat 15 drives the threaded steel to enter the fixed shell 9 until the threaded steel enters the heating furnace 12, and then the heating furnace 12 heats the threaded steel, and at the same time, the heating pipe 1003 heats the air inside the fixed shell 9 to form hot air. After the threaded steel is heated, the first electric push rod 14 continues to drive the storage seat 15 and the limit plate 1701 to move backward until the heated threaded steel moves backward to the two connections. The blocks 5 are in the same straight line, during which the storage seat 15 will drive the heated threaded steel to pass through and leave the heating furnace 12. When the heated threaded steel leaves the heating furnace 12, the heated threaded steel in the fixed shell 9 will be insulated by the hot air, thereby preventing the heated threaded steel from cooling down quickly. After that, when the heated threaded steel moves backward to be in the same straight line with the two connecting blocks 5, the second electric push rod 701 drives the push plate 702 to move toward the side close to the threaded steel, so that the push plate 702 pushes the movable seat 703 and the clamp 8 to move toward the side close to the threaded steel until the clamp 8 clamps the end of the threaded steel, and then the first electric push rod 14 drives the storage seat 15 and the limit plate 1701 to move forward and reset. When the limit When the plate 1701 contacts the threaded steel clamped by the clamp 8, the threaded steel will squeeze the limiting plate 1701 to rotate, and the first spring piece 1702 will be deformed. When the limiting plate 1701 is separated from the threaded steel clamped by the clamp 8, the first spring piece 1702 returns to its original state, and the first spring piece 1702 drives the limiting plate 1701 to reverse and reset, and then the threaded steel is placed in the storage seat 15 again, and the above-mentioned threaded steel heating operation is repeated, so as to heat the next threaded steel to be tested in advance, thereby saving heating time and improving test efficiency, and then the reduction motor 601 is used to drive the force sensor 4 and the connecting block 5 to rotate through the gear set 602 until the connecting block 5 rotates ninety degrees, so that the movable seat 703 on the connecting block 5 and the clamp 8 are located on the front and rear sides of the threaded steel.Next, the first servo motor 202 is used to drive the screw rod 203 to reverse through the gear box 201, so that the two movable frames 3 and the two connecting blocks 5 move to the side away from each other, thereby pulling the two ends of the threaded steel bar to perform a tensile test on the threaded steel bar. During this period, the force sensor 4 is used to continuously detect the tensile force data applied to the threaded steel bar, and the displacement sensor 11 is used to detect the displacement change data generated by the threaded steel bar during the entire process from the beginning of loading to the fracture. After that, the controller 16 integrates the data to obtain the tensile test result of the threaded steel bar, thereby completing the tensile test of the threaded steel bar. During the tensile test of the threaded steel bar, lateral stretching is used to make the threaded steel bar subject to force in the horizontal direction. When rust or other impurities attached to the surface of the threaded steel bar fall off, the rust or other impurities can be prevented from falling onto the connecting block 5, the movable seat 703 and the clamp 8. In addition, the movable seat 703 and the clamp 8 on the connecting block 5 are located on the front and rear sides of the threaded steel bar, which can also prevent the rust from falling off at the end of the threaded steel bar. Corrosion or other impurities fall on the connecting block 5, the movable seat 703 and the clamp 8; after the tensile test of the threaded steel is completed, the push plate 702 is driven by the second electric push rod 701 to move and reset to the side away from the threaded steel, so that the push plate 702 pushes the movable seat 703 and the clamp 8 to move and reset to the side away from the threaded steel, so that the clamp 8 loosens the end of the threaded steel, so that the threaded steel that has completed the test falls down into the fixed shell 9 under the influence of gravity, and then the threaded steel that has completed the test will fall out through the outlet at the bottom of the fixed shell 9. Then, the reduction motor 601 is used to drive the force sensor 4 and the connecting block 5 through the gear set 602 to reverse and reset until the connecting block 5 rotates ninety degrees in the opposite direction and resets. Then, the first servo motor 202 is used to drive the screw rod 203 to rotate through the gear box 201, so that the two movable frames 3 and the two connecting blocks 5 move to the side close to each other and reset. Then, the above operation is repeated to perform a tensile test on the next threaded steel that has completed heating in the heating furnace 12.

[0042] See also Fig.12 and Fig.13 As shown, it also includes a feeding mechanism, which includes a feeding frame 18, a cover plate 19, a distance sensor 20, a fourth electric push rod 21 and a first baffle 22; a feeding frame 18 for placing threaded steel is installed on the top of the fixed seat 13; a cover plate 19 is rotatably arranged on the upper rear side of the feeding frame 18; distance sensors 20 are symmetrically arranged on the lower part of the feeding frame 18, and the distance sensors 20 are used to detect the length of the threaded steel, and the distance sensors 20 are electrically connected to the controller 16; a fourth electric push rod 21 is symmetrically arranged on the upper front side of the fixed seat 13; a first baffle 22 is slidably arranged on the front side of the feeding frame 18, and the first baffle 22 is used to block the threaded steel in the feeding frame 18, and the first baffle 22 is connected to the telescopic rod of the fourth electric push rod 21.

[0043] When in use, the cover plate 19 can be pulled and rotated to open, and then an appropriate amount of threaded steel bars can be loaded into the discharge frame 18, so that the threaded steel bars at the bottom are in contact with the first baffle plate 22, and the threaded steel bars at the bottom are aligned with the distance sensor 20, so that the distance sensor 20 can detect the distance between itself and the threaded steel bars at the bottom. When the distance sensor 20 completes the detection, the distance sensor 20 will send the detection data to the controller 16, and then the controller 16 will integrate the data to obtain the length of the threaded steel bars at the bottom (the initial detection distance of the distance sensor 20 - the distance detected by the two distance sensors 20 = the length of the threaded steel bars), and then the controller 16 will send the detection data to the display center so that the operator can obtain the distance between the threaded steel bars at the bottom through the display center. The length of the rebar is adjusted so that the operator can adjust the length between the two connecting blocks 5 to facilitate the operator to adapt the length between the two connecting blocks 5 to the length of the rebar; when the rebar needs to be placed in the storage seat 15, the first baffle 22 can be driven forward by the fourth electric push rod 21, so that the first baffle 22 no longer blocks the rebar in the discharge frame 18. At this time, the rebar in the discharge frame 18 will continue to fall downward under the influence of gravity until the bottom rebar falls into the storage seat 15, and then the first baffle 22 is driven backward and reset by the fourth electric push rod 21, so that the first baffle 22 continues to block the remaining rebar in the discharge frame 18; in this way, the rebar can be automatically loaded.

[0044] See also Figure 12-14 As shown, it also includes an adjustment mechanism, which includes a visual sensor 23, a second servo motor 24 and a friction wheel 25; the visual sensor 23 is installed on the upper left side of the fixed seat 13, and the visual sensor 23 is electrically connected to the controller 16; the second servo motor 24 is symmetrically installed on the fixed seat 13; the friction wheel 25 is symmetrically rotated on the upper inner side of the fixed seat 13, and the friction wheel 25 is used to drive the threaded steel to rotate, and the output shafts of the two second servo motors 24 are respectively connected to the two friction wheels 25.

[0045] When the lowermost threaded steel bar falls into the storage seat 15, the lowermost threaded steel bar will contact the friction wheel 25, and then the cross-section of the threaded steel bar in the storage seat 15 can be detected by the visual sensor 23. If the two transverse ribs need to be located at the top and bottom of the threaded steel bar respectively when the threaded steel bar is placed, no additional operation is required. If the two transverse ribs are not located at the top and bottom of the threaded steel bar respectively, the friction wheel 25 is driven to rotate by the second servo motor 24, so that the friction wheel 25 drives the threaded steel bar to rotate, thereby automatically adjusting the direction of the transverse ribs on the threaded steel bar until the two transverse ribs need to be located at the top and bottom of the threaded steel bar respectively. In this way, it is convenient for the subsequent clamp 8 to clamp the threaded steel bar.

[0046] See also Fig.15 and Fig.16As shown, it also includes a discharge mechanism, which includes a second baffle 26, a second spring piece 27 and a discharge plate 28; a second baffle 26 is rotatably provided at the bottom of the fixed shell 9, and the second baffle 26 is used to block the opening at the bottom of the fixed shell 9; a second spring piece 27 is connected between the bottom of the second baffle 26 and the bottom of the fixed shell 9; a discharge plate 28 is connected between the two bases 1, and the discharge plate 28 is located below the fixed shell 9.

[0047] By setting the second baffle 26, the second baffle 26 can be used to cover the opening at the bottom of the fixed shell 9, thereby preventing the hot air in the fixed shell 9 from leaking out from the opening. The purpose of preventing hot air leakage is to maintain a constant temperature environment and ensure the consistency of the test conditions. When the threaded steel bar that has completed the test falls down and contacts with the second baffle 26, the threaded steel bar that has completed the test will squeeze the second baffle 26 and rotate it open, and the second spring piece 27 will deform, so that the threaded steel bar that has completed the test will roll through the second baffle 26 and fall onto the discharge plate 28, so that the threaded steel bar that has completed the test will roll and be discharged through the discharge plate 28. When the threaded steel bar that has completed the test falls down and separates from the second baffle 26, the second spring piece 27 returns to its original state, and the second spring piece 27 drives the second baffle 26 to reverse and close.

[0048] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A threaded steel tensile testing device, comprising a base (1), characterized in that: A stretching mechanism is provided between the two bases (1), two movable frames (3) are threadedly provided on the stretching mechanism, the stretching mechanism is used to drive the movable frames (3) to translate, a force sensor (4) is rotatably connected to the movable frames (3), a connecting block (5) is connected to the force sensor (4), a rotating mechanism is provided on the movable frames (3), the rotating mechanism is used to drive the force sensor (4) to rotate, a driving mechanism is provided on the connecting block (5), a clamp (8) for clamping the threaded steel bar is provided on the driving mechanism, a fixed shell (9) is provided between the two bases (1), an outlet for the threaded steel bar to fall out is provided at the bottom of the fixed shell (9), and the two movable frames (3) are provided with a plurality of movable frames (3). The fixed shell (9) is slidably penetrated, and a sealing mechanism is arranged on the fixed shell (9), and the sealing mechanism is used to seal the fixed shell (9). A displacement sensor (11) and a heating furnace (12) are connected to the inside of the fixed shell (9), and the heating furnace (12) is used to heat the threaded steel. A fixed seat (13) is arranged on the outside of the fixed shell (9), and a first electric push rod (14) is connected to the fixed seat (13). A storage seat (15) for placing the threaded steel is connected to the telescopic rod of the first electric push rod (14). A controller (16) is installed on the side of the fixed seat (13), and a limiting mechanism for limiting the threaded steel is arranged on the storage seat (15).

2. A threaded steel tensile testing device as claimed in claim 1, characterized in that: The stretching mechanism comprises a gear box (201), a first servo motor (202) and a screw rod (203). The two bases (1) are both equipped with a gear box (201). The gear box (201) is provided with the first servo motor (202). The input end of the gear box (201) is connected to the output shaft of the first servo motor (202). The base (1) is symmetrically provided with a screw rod (203) for rotation. The screw rod (203) on the base (1) is threadedly connected to the movable frame (3), and the screw rod (203) is connected to the output end of the gear box (201).

3. A threaded steel tensile testing device as claimed in claim 2, characterized in that: The rotating mechanism comprises a reduction motor (601) and a gear set (602). The reduction motor (601) is mounted on the movable frame (3). The gear set (602) is mounted between the output shaft of the reduction motor (601) and the force sensor (4). The gear set (602) is used for transmission between the output shaft of the reduction motor (601) and the force sensor (4).

4. A threaded steel tensile testing device as claimed in claim 3, characterized in that: The driving mechanism comprises a second electric push rod (701), a push plate (702) and a movable seat (703); the second electric push rod (701) is connected to the connecting block (5); the push plate (702) is connected to the telescopic rod of the second electric push rod (701); the movable seat (703) is also symmetrically slidably arranged on the connecting block (5); the clamp (8) is slidably installed on the movable seat (703); and the push plate (702) is slidably connected to the movable seat (703).

5. A threaded steel tensile testing device as claimed in claim 4, characterized in that: The sealing mechanism comprises a rotating shell (1001), a third electric push rod (1002) and a heating tube (1003); the rotating shell (1001) is rotatably arranged on the fixed shell (9); the third electric push rod (1002) is symmetrically rotatably arranged on the fixed shell (9); the telescopic rod of the third electric push rod (1002) is rotatably connected to the rotating shell (1001); the heating tube (1003) is installed at intervals inside the rotating shell (1001); the heating tube (1003) is used to heat and keep the threaded steel in the fixed shell (9) warm.

6. A threaded steel tensile testing device as claimed in claim 5, characterized in that: The limiting mechanism comprises a limiting plate (1701) and a first spring piece (1702); the limiting plate (1701) is symmetrically rotatably arranged on the storage seat (15); and the first spring piece (1702) is connected between the limiting plate (1701) and the storage seat (15).

7. A threaded steel tensile testing device as claimed in claim 6, characterized in that: The invention also comprises a feeding mechanism, which comprises a feeding frame (18), a cover plate (19), a distance sensor (20), a fourth electric push rod (21) and a first baffle plate (22). A feeding frame (18) for placing threaded steel bars is installed on the top of the fixed seat (13). The cover plate (19) is rotatably arranged on the feeding frame (18). The distance sensor (20) is symmetrically arranged on the side of the feeding frame (18). The distance sensor (20) is used to detect the length of the threaded steel bars. The fourth electric push rod (21) is symmetrically arranged on the fixed seat (13). The first baffle plate (22) is slidably arranged on the side of the feeding frame (18). The first baffle plate (22) is used to block the threaded steel bars in the feeding frame (18), and the first baffle plate (22) is connected to the telescopic rod of the fourth electric push rod (21).

8. A threaded steel tensile testing device as claimed in claim 7, characterized in that: The invention also comprises an adjusting mechanism, which comprises a visual sensor (23), a second servo motor (24) and a friction wheel (25). The visual sensor (23) is mounted on the fixed seat (13), the second servo motor (24) is symmetrically mounted on the fixed seat (13), and the friction wheel (25) is symmetrically rotatably arranged on the fixed seat (13). The friction wheel (25) is used to drive the threaded steel to rotate, and the output shaft of the second servo motor (24) is connected to the friction wheel (25).

9. A threaded steel tensile testing device as claimed in claim 8, characterized in that: The invention also comprises a discharging mechanism, which comprises a second baffle (26), a second elastic piece (27) and a discharging plate (28); the second baffle (26) is rotatably arranged at the bottom of the fixed shell (9); the second elastic piece (27) is connected between the second baffle (26) and the bottom of the fixed shell (9); the discharging plate (28) is connected between the two bases (1); and the discharging plate (28) is located below the fixed shell (9).

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