A fixed and reliable reinforcing bar tension testing device

Abstract

The application relates to the technical field of steel bar tension test, and discloses a fixed and reliable steel bar tension test device which comprises a tension testing machine shell, an upper clamping group and a lower clamping group, the upper clamping group and the lower clamping group are arranged on the tension testing machine shell, the upper clamping group is arranged above the lower clamping group, a position-adjusting rotating group is arranged in the lower clamping group, the position-adjusting rotating group comprises a working groove, the working groove is arranged in the lower clamping group, and a positioning rotating turbine is rotationally connected in the working groove; through the transmission structure of the worm, the positioning rotating turbine and the threaded rod, the upper and lower positions of the steel bar can be accurately adjusted, the lengths of the two ends extending into the clamping group are ensured to be uniform, the problem of uneven tension distribution caused by poor centering is avoided, centering adjustment is realized, and the test accuracy is improved; the functions of 'length centering' and 'perpendicularity correction' are clearly separated, different effects are realized through the same mechanism structure by switching states.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steel bar tension test, in particular to a fixed steel bar tension test device. BACKGROUND

[0002] The steel bar tension test device is actually an instrument specially used to test the mechanical properties of steel bars under tension. It applies gradually increasing tension to the steel bar until it is pulled apart, thereby detecting its strength, plasticity and other key indicators.

[0003] The columnar steel bar tension test device on the market generally has the problems of difficult centering adjustment, poor clamping adaptability, and complicated verticality correction. First, most devices rely on manual visual judgment of the length of the steel bar inserted at both ends, lack accurate centering mechanisms, resulting in uneven clamping stress and large test data fluctuations. Second, verticality adjustment usually requires repeated measurement with external tools, relying too much on operator experience and lacking intuitive monitoring feedback. Finally, the various adjustment functions are scattered in different mechanisms, making it inconvenient to switch and difficult to adapt to batch testing requirements.

[0004] Therefore, it is necessary to provide a fixed steel bar tension test device to solve the above problems. SUMMARY

[0005] In view of the deficiencies of the prior art, the purpose of the present application is to provide a fixed steel bar tension test device.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a fixed steel bar tension test device, comprising a tension testing machine shell, an upper clamping group and a lower clamping group, the upper clamping group and the lower clamping group are arranged on the tension testing machine shell, and the upper clamping group is arranged above the lower clamping group, and a position adjusting rotating group is arranged in the lower clamping group.

[0007] The position adjusting rotating group comprises a working groove, the working groove is opened in the inside of the lower clamping group, a positioning rotating turbine is rotatably connected in the inside of the working groove, a threaded rod is screwedly connected in the inside of the positioning rotating turbine, a vertical groove is opened in the lower surface of the threaded rod, a rectangular block is slidably connected in the inside of the vertical groove, a rotating groove is opened in the inside of the lower clamping group, and the rectangular block is slidably connected in the inside of the rotating groove, a disc limiting rotating rod is fixedly connected to one end of the rectangular block away from the vertical groove, a first return spring is sleeved on the outer wall of the disc limiting rotating rod, a positioning block group is fixedly connected in the inside of the lower clamping group, a worm is rotatably connected in the inside of the positioning block group, and a rotating handle is fixedly connected to one end of the worm away from the lower clamping group.

[0008] Preferably, the position-adjusting rotating set further comprises a bearing disc, an inner wall of the bearing disc is fixedly connected to the bottom of the threaded rod, and three arc-shaped rods are fixedly connected in an annular distribution on the outer wall of the bearing disc.

[0009] Preferably, the top of the threaded rod is provided with a fixing assembly, the top of the threaded rod is fixedly connected with a positioning cylinder, the positioning cylinder is fixedly connected to the top of the threaded rod, and the upper surface of the positioning cylinder is fixedly connected with six fixing blocks in an annular shape.

[0010] Preferably, the fixing assembly further comprises six clamping pieces, the six clamping pieces are fixedly connected to the side, away from the fixing blocks, of the groove sliding plate, the outer wall of the groove sliding plate is fixedly connected with a second reset spring, and one end of the second reset spring, away from the groove sliding plate, is fixedly connected to the fixing block.

[0011] Preferably, the upper clamping set and the lower clamping set are both provided with a perpendicularity detection set, the perpendicularity detection set comprises two square clamping blocks, the two square clamping blocks are respectively clamped on the upper clamping set and the lower clamping set, the interiors of the two square clamping blocks are both provided with a detection rod, the outer walls of the two detection rods are both fixedly connected with a positioning plate, the interiors of the two detection rods are both rotatably connected with a limiting strip, the outer walls of the two limiting strips are both fixedly connected with a third reset spring, one end of the third reset spring, away from the limiting strip, is fixedly connected to the positioning plate, the interiors of the two detection rods are both slidably connected with a contact head, and the interior of the contact head is fixedly connected with a gear plate.

[0012] Preferably, the perpendicularity detection set further comprises a dial indicator, the dial indicator is fixedly connected to the square clamping block on the lower clamping set, the detection rod on the lower clamping set is slidably connected in the interiors of the dial indicator and the square clamping block, the detection rod on the upper clamping set is fixedly connected in the interior of the square clamping block, and the bottom of the lower clamping set is provided with an alarm lamp.

[0013] Preferably, the worm is engaged with the positioning rotating turbine, the disc limiting rotating rod is slidably and rotatably connected in the interior of the lower clamping set, one end of the first reset spring is fixedly connected to the lower clamping set, and the other end of the first reset spring is in contact with the disc limiting rotating rod.

[0014] Preferably, the side, away from the groove sliding plate, of each clamping piece is provided with an anti-skid pattern, and the top of the side, away from the groove sliding plate, of each clamping piece is provided as an inclined surface.

[0015] Preferably, the limiting strip is in contact with the gear plate, and one end of each contact head, away from the detection rod, is provided as an arc surface.

[0016] The present invention provides a securely fixed steel bar tensile testing device. Compared with the prior art, the advantages of the present invention are:

[0017] Through the transmission structure of worm gear, positioning rotary turbine, and threaded rod, and in conjunction with the liftable positioning cylinder, the vertical position of the steel bar can be precisely adjusted to ensure that the length of the two ends extending into the clamping group is uniform. This avoids the problem of uneven tension distribution caused by poor alignment, improves the reliability of test data, realizes alignment adjustment, and enhances test accuracy.

[0018] By using the clamping plate and the second reset spring, the spring is used for clamping, which achieves flexible and uniform clamping, ensures the stability of the initial clamping, and avoids damage to the surface of the specimen. It is suitable for testing steel bars of various specifications.

[0019] By incorporating a double contact head, dial indicator, and alarm light, the system achieves intuitive monitoring and automatic correction of verticality without the need for external tools. When the rebar is not vertical, the dial indicator pointer deflects significantly. As the rebar is rotated and adjusted, the pointer gradually returns to the center, and the alarm light goes out, indicating that the rebar is now vertical. This design simplifies the verticality adjustment process and reduces reliance on the operator's experience.

[0020] This device clearly separates the "length alignment" and "verticality correction" functions. Through the same mechanism, different effects are achieved by switching states. The operation logic is clear. With the help of the rotation locking mechanism (rectangular block, vertical groove, rotating groove, etc.), the adjustment mode can be quickly switched when needed, which not only ensures the adjustment accuracy but also improves the operation efficiency, making it suitable for batch testing scenarios. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the overall positional relationship of the device in this invention;

[0022] Figure 2 This is a cross-sectional view of the overall device in this invention;

[0023] Figure 3 For the present invention Figure 2 Enlarged view of the structure at point A in the middle;

[0024] Figure 4 This is a schematic diagram showing the positional relationship between the square card block, the detection rod, and the dial indicator in this invention;

[0025] Figure 5 For the present invention Figure 4 Enlarged view of the structure at point B in the middle;

[0026] Figure 6 This is a schematic diagram showing the positional relationship between the square card block and the detection rod in this invention;

[0027] Figure 7 For the present inventionFigure 6 Enlarged view of structure at C in the figure;

[0028] Figure 8 Schematic view of the position relationship among the upper clamping group, the lower clamping group, the square block, the detection rod and the dial gauge in the application;

[0029] Figure 9 Schematic view of the position relationship among the lower clamping group, the threaded rod and the positioning cylinder in the application;

[0030] Figure 10 Schematic view of the position relationship among the working groove, the positioning rotary turbine, the threaded rod, the bearing disc and the arc-shaped rod in the application; Figure 9 Enlarged view of structure at D in the figure;

[0031] Figure 11 Schematic view of the position relationship among the rectangular block, the rotary groove and the disc limiting rotary rod in the application;

[0032] Figure 12 Enlarged view of structure at E in the figure; Figure 11

[0033] Figure 13 Schematic view of the position relationship among the positioning cylinder, the fixed block and the recessed slide plate in the application;

[0034] Figure 14 Schematic view of the position relationship among the positioning cylinder, the fixed block and the recessed slide plate in the application;

[0035] Figure 15 Enlarged view of structure at F in the figure. Figure 14

[0036] Reference signs: 11, tensile testing machine shell; 12, upper clamping group; 13, lower clamping group;

[0037] The position-adjusting rotary group comprises: 21, working groove; 22, positioning rotary turbine; 23, threaded rod; 24, vertical groove; 251, rectangular block; 252, rotary groove; 26, disc limiting rotary rod; 27, first return spring; 28, positioning block group; 29, worm; 210, rotating handle; 211, bearing disc; 212, arc-shaped rod; 213, arc-shaped slide groove;

[0038] The fixing assembly comprises: 31, positioning cylinder; 32, fixed block; 33, recessed slide plate; 34, clamping piece; 35, second return spring;

[0039] The perpendicularity detection group comprises: 41, square block; 42, detection rod; 43, positioning plate; 44, limiting strip; 45, third return spring; 46, abutting head; 47, toothed plate; 48, dial gauge; 49, alarm lamp. DETAILED DESCRIPTION

[0040] ​​To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the invention and are not intended to limit the invention.

[0041] In the description of this invention, the terms “center,” “horizontal,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0043] Implementation, for example Figures 1 to 3 , Figures 9 to 13 As shown, a reliably fixed steel bar tensile testing device provided in an embodiment of the present invention includes a tensile testing machine housing 11, an upper clamping group 12 and a lower clamping group 13. The upper clamping group 12 and the lower clamping group 13 are both disposed on the tensile testing machine housing 11, and the upper clamping group 12 is disposed above the lower clamping group 13. An adjustment and rotation group is disposed inside the lower clamping group 13.

[0044] The lower clamping assembly 13 is slidably connected to the housing 11 of the tensile testing machine, and a driving component is provided at the bottom of the lower clamping assembly 13 to drive the lower clamping assembly 13 to rise or fall.

[0045] The adjustment and rotation assembly includes a working groove 21, which is located inside the lower clamping assembly 13. A positioning rotary turbine 22 is rotatably connected inside the working groove 21. A threaded rod 23 is threadedly connected inside the positioning rotary turbine 22. A vertical groove 24 is provided on the lower surface of the threaded rod 23. A rectangular block 251 is slidably connected inside the vertical groove 24. A disc limiting rotary rod 26 is fixedly connected to the end of the rectangular block 251 away from the vertical groove 24. A first return spring 27 is sleeved on the outer wall of the disc limiting rotary rod 26. A positioning block assembly 28 is fixedly connected inside the lower clamping assembly 13. A worm gear 29 is rotatably connected inside the positioning block assembly 28. A rotating handle 210 is fixedly connected to the end of the worm gear 29 away from the lower clamping assembly 13.

[0046] The worm 29 is engaged with the disc limiting rotary rod 26, so that the worm 29 can drive the disc limiting rotary rod 26 to rotate, the disc limiting rotary rod 26 is slidingly and rotatably connected in the inside of the lower clamping group 13, so that the disc limiting rotary rod 26 can drive the rectangular block 251 to be separated from the inside of the vertical groove 24, one end of the first reset spring 27 is fixedly connected to the lower clamping group 13, and the other end of the first reset spring 27 abuts against the disc limiting rotary rod 26.

[0047] As shown in Figures 14 to 15 , the top of the threaded rod 23 is provided with a fixing assembly, the top of the threaded rod 23 is fixedly connected with a positioning cylinder 31, the positioning cylinder 31 is fixedly connected to the top of the threaded rod 23, and the upper surface of the positioning cylinder 31 is annularly and fixedly connected with six fixed blocks 32. The outer wall of each fixed block 32 is slidingly connected with a groove sliding plate 33.

[0048] The fixing assembly further comprises six clamping pieces 34, and the six clamping pieces 34 are fixedly connected to the side, away from the fixed blocks 32, of the groove sliding plate 33. The outer wall of the groove sliding plate 33 is fixedly connected with a second reset spring 35, and one end of the second reset spring 35, away from the groove sliding plate 33, is fixedly connected to the fixed block 32.

[0049] It should be noted that the side, away from the groove sliding plate 33, of each clamping piece 34 is provided with anti-skid lines, and the top of the side, away from the groove sliding plate 33, of each clamping piece 34 is provided as an inclined surface, so as to facilitate the preliminary fixing of the columnar steel bar test piece.

[0050] As shown in Figures 4 to 8 , the upper clamping group 12 and the lower clamping group 13 are both provided with a perpendicularity detection group, the perpendicularity detection group comprises two square clamping blocks 41, the two square clamping blocks 41 are clamped on the upper clamping group 12 and the lower clamping group 13 respectively, the inside of each square clamping block 41 is provided with a detection rod 42, the outer wall of each detection rod 42 is fixedly connected with a positioning plate 43, the inside of each detection rod 42 is rotatably connected with a limiting strip 44, the outer wall of each limiting strip 44 is fixedly connected with a third reset spring 45, one end of the third reset spring 45, away from the limiting strip 44, is fixedly connected to the positioning plate 43, the inside of each detection rod 42 is slidingly connected with an abutting head 46, and the inside of the abutting head 46 is fixedly connected with a toothed plate 47.

[0051] The perpendicularity detection group further comprises a dial gauge 48, the dial gauge 48 is fixedly connected to the square clamping block 41 on the lower clamping group 13, the detection rod 42 on the lower clamping group 13 is slidingly connected in the inside of the dial gauge 48 and the square clamping block 41, the detection rod 42 on the upper clamping group 12 is fixedly connected in the inside of the square clamping block 41, and the bottom of the lower clamping group 13 is provided with an alarm lamp 49.

[0052] It should be noted that the limiting strip 44 is in contact with the toothed plate 47, so that the limiting strip 44 can limit the contact head 46 through the toothed plate 47. The two contact heads 46 are provided as arc surfaces away from the one end of the detection rod 42, so as to facilitate the contact head 46 to detect the perpendicularity of the columnar steel test piece. The dial gauge 48 has a connection relationship with the alarm lamp 49, so that after the dial gauge 48 detects the perpendicularity of the columnar steel test piece, the verticality of the columnar steel test piece can be known by using the alarm lamp 49. The alarm lamp 49 is designed with red and green colors (red represents non-perpendicularity, and green represents perpendicularity), and is equipped with a buzzer (volume ≥ 80 dB). When the perpendicularity of the columnar steel meets the standard, the light changes from red to green with the buzzer prompt, which takes into account visual and auditory feedback, reduces the observation burden of the operator, and the dial gauge 48 is a pointer type dial gauge in the prior art. The working core is to convert a small linear displacement into a rotary motion of a pointer to realize "small displacement visualization". This is not described in detail in the prior art.

[0053] In combination with the above-mentioned embodiments, the following is the entire working process and working principle of the above-mentioned embodiments:

[0054] Working principle: In the initial state, the first reset spring 27, the second reset spring 35 and the third reset spring 45 are not compressed, and the rectangular block 251 is located in the interior of the vertical groove 24.

[0055] During work, the columnar steel test piece is usually placed manually by artificial, and the columnar steel test piece has different insertion lengths in the upper clamping group 12 and the lower clamping group 13, which will cause uneven stress of the upper clamping group 12 and the lower clamping group 13, resulting in deviation of tension distribution and finally leading to distortion of test data.

[0056] Columnar steel test piece fixing and centering adjustment:

[0057] The worker first needs to insert the columnar steel test piece into the interior of the lower clamping group 13, and then place the columnar steel test piece in the positioning cylinder 31. The columnar steel test piece will first contact the inclined surfaces of the six clamping pieces 34. At this time, the columnar steel test piece will move towards the fixed block 32 according to its own diameter, and the recessed slide plate 33 will gradually compress the second reset spring 35 towards the fixed block 32.

[0058] After the bottom of the columnar steel test piece contacts the inner cavity bottom of the positioning cylinder 31, the second reset spring 35 will make the six recessed slide plates 33 contact the columnar steel test piece through the clamping pieces 34, so that the columnar steel test piece is preliminarily fixed.

[0059] Subsequently, the staff drives the lower clamping group 13 and the positioning cylinder 31 inside it to rise through the drive assembly, so that both ends of the columnar steel test piece are located inside the upper clamping group 12 and the lower clamping group 13.

[0060] After the columnar steel test piece is preliminarily fixed, both ends of the columnar steel test piece are located inside the upper clamping group 12 and the lower clamping group 13, at which time the staff rotates the rotating handle 210. When the rotating handle 210 rotates, it will drive the worm 29 to rotate synchronously around the positioning block group 28. The worm 29 is engaged with the positioning rotary turbine 22, so that the worm 29 drives the positioning rotary turbine 22 to rotate during the rotation process. Subsequently, the positioning rotary turbine 22 drives the threaded rod 23 to rise or fall through the threaded groove;

[0061] During the rising or falling process of the threaded rod 23, the top positioning cylinder 31 rises or falls synchronously, and the top columnar steel test piece rises or falls synchronously under the action of the positioning cylinder 31. After the staff makes the two ends of the columnar steel test piece extend into the inside of the upper clamping group 12 and the lower clamping group 13 more uniform in length, the data is more accurate when the upper clamping group 12 and the lower clamping group 13 perform the tensile test on the columnar steel test piece.

[0062] During the rising or falling process of the threaded rod 23, the threaded rod 23 pulls the bottom bearing disc 211 to rise or fall synchronously, and the arc-shaped rod 212 on the outer wall slides along the inside of the arc-shaped sliding groove 213 under the action of the bearing disc 211.

[0063] Through the clamping of the clamping piece 34 and the second reset spring 35, the spring is used for clamping, which realizes flexible and uniform clamping, ensures the stability of the preliminary clamping, avoids damage to the surface of the test piece, and is suitable for steel test of various specifications;

[0064] Through the transmission structure of the worm 29, the positioning rotary turbine 22 and the threaded rod 23, combined with the liftable positioning cylinder 31, the position of the steel can be accurately adjusted, the length of the two ends extending into the clamping group is uniform, the problem of uneven distribution of tensile force caused by poor centering is avoided, the reliability of the test data is improved, the centering adjustment is realized, and the test accuracy is improved;

[0065] Adjustment of the abutting head 46:

[0066] After the columnar reinforcing steel test piece is initially fixed, the worker needs to press the limiting strip 44, the limiting strip 44 is compressed to the positioning plate 43 direction third reset spring 45, then the limiting strip 44 is out of the restriction of the toothed plate 47, then the worker can pull the two contact heads 46 according to the diameter of the columnar reinforcing steel test piece, the two contact heads 46 slide in the inside of the detection rod 42, the two contact heads 46 are away from the end of the detection rod 42, and the two contact heads 46 are in contact with the columnar reinforcing steel test piece. Finally, stop pressing the limiting strip 44, the third reset spring 45 will elastically stretch and push the pressing limiting strip 44 to contact the toothed plate 47, and then the toothed plate 47 limits the position of the contact head 46.

[0067] Perpendicularity adjustment:

[0068] When the worker inserts the two ends of the columnar reinforcing steel test piece into the inside of the upper clamping group 12 and the lower clamping group 13 to a uniform length, the worker needs to pull the disc limiting rotary rod 26 away from the threaded rod 23, then the disc limiting rotary rod 26 will gradually compress the first reset spring 27, and the disc limiting rotary rod 26 will drive the rectangular block 251 to move away from the vertical groove 24, then the disc limiting rotary rod 26 will drive the rectangular block 251 to gradually slide into the inside of the rotary groove 252;

[0069] Then rotate the disc limiting rotary rod 26, the disc limiting rotary rod 26 drives the rectangular block 251 to rotate in the inside of the rotary groove 252, then the worker stops pulling the disc limiting rotary rod 26, at this time the first reset spring 27 elastically stretches and pushes the disc limiting rotary rod 26 and the rectangular block 251 to move to the vertical groove 24, and the rectangular block 251 is driven by the rotation of the disc limiting rotary rod 26, at this time the first reset spring 27 elastically pushes the rectangular block 251 to contact the rotary groove 252, so that the rectangular block 251 cannot contact the vertical groove 24 on the threaded rod 23, thereby preventing the threaded rod 23 from rising or falling during the rotation of the positioning rotary turbine 22;

[0070] Then when the worker rotates the rotating handle 210 again, the rotating handle 210 will rotate the positioning rotary turbine 22 through the meshing of the worm 29, at this time the rectangular block 251 cannot contact the vertical groove 24 on the threaded rod 23, thereby the positioning rotary turbine 22 rotates to drive the threaded rod 23 to rotate synchronously, and the threaded rod 23 rotates to improve the smoothness of rotation through the bottom bearing disc 211;

[0071] The threaded rod 23 rotates to drive the top positioning cylinder 31 to rotate, and at this time the second reset spring 35 elastically drives the six recessed groove sliding plates 33 to contact the columnar reinforcing steel test piece through the clamping pieces 34, so that the columnar reinforcing steel test piece is initially fixed, and then the positioning cylinder 31 drives the columnar reinforcing steel test piece to rotate synchronously.

[0072] At this time, the ends of the two contact heads 46 that are away from the detection rod 42 both contact the columnar steel bar test piece. When the columnar steel bar test piece rotates around the positioning cylinder 31 in a non-perpendicular state, it will compress the contact head 46 at the end of the detection rod 42 away from the dial indicator 48 on the clamping group 13. The columnar steel bar test piece in a non-perpendicular state will move by contacting the contact head 46 and the detection rod 42, causing the detection rod 42 to slide inside the square block 41 and the dial indicator 48. The greater the distance that the detection rod 42 moves after being contacted by the columnar steel bar test piece, the greater the rotation amplitude of the pointer on the dial indicator 48. Conversely, the smaller the angle of the columnar steel bar test piece's offset, the smaller the distance that the columnar steel bar test piece moves by contacting the detection rod 42, and the smaller the rotation amplitude of the pointer on the dial indicator 48.

[0073] As the columnar rebar test piece rotates, the detection rod 42 on the upper clamping group 12 contacts the rebar through the contact head 46. In conjunction with the detection system of the lower clamping group 13, the verticality of the rebar is gradually corrected. Since the dial indicator 48 and the alarm light 49 are connected, when the alarm light 49 is turned off, the columnar rebar test piece is in a vertical state with both the upper clamping group 12 and the lower clamping group 13, thereby achieving the purpose of correcting the columnar rebar test piece.

[0074] By setting up double contact heads 46, dial indicator 48, and alarm light 49, the verticality can be intuitively monitored and automatically corrected without the need for external tools for measurement and calibration. When the rebar is not vertical, the pointer of dial indicator 48 deflects significantly. As the rebar is rotated and adjusted, the pointer gradually returns to the positive position. At the same time, the alarm light 49 goes out, indicating that the rebar is vertical. This design simplifies the verticality adjustment process and reduces the reliance on the operator's experience.

[0075] This device clearly separates the "length alignment" and "verticality correction" functions. Through the same mechanism, different effects can be achieved by switching states. The operation logic is clear. With the help of the rotation locking mechanism (rectangular block 251, vertical groove 24, rotation groove 252, etc.), the adjustment mode can be quickly switched when needed, which not only ensures the adjustment accuracy but also improves the operation efficiency, making it suitable for batch testing scenarios.

[0076] While several embodiments and examples of the present invention have been described for those skilled in the art, these embodiments and examples are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included within the scope and spirit of the invention, and are included within the scope of the invention as described in the claims and its equivalents.

[0077] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A securely fixed steel bar tensile testing device, comprising a tensile testing machine housing (11), an upper clamping group (12), and a lower clamping group (13), wherein the upper clamping group (12) and the lower clamping group (13) are both disposed on the tensile testing machine housing (11), and the upper clamping group (12) is disposed above the lower clamping group (13), characterized in that, The lower clamping group (13) is provided with a position adjusting rotating group; The position adjusting rotating group comprises a working groove (21) which is arranged in the lower clamping group (13), a positioning rotating turbine (22) which is rotatably connected to the inside of the working groove (21), a threaded rod (23) which is threadedly connected to the inside of the positioning rotating turbine (22), a vertical groove (24) which is arranged on the lower surface of the threaded rod (23), a rectangular block (251) which is slidably connected to the inside of the vertical groove (24), a rotating groove (252) which is arranged in the lower clamping group (13) and in which the rectangular block (251) is slidably connected, and a disc limiting rotating rod (26) which is fixedly connected to one end of the rectangular block (251) away from the vertical groove (24), a first reset spring (27) which is sleeved on the outer wall of the disc limiting rotating rod (26), a positioning block group (28) which is fixedly connected to the inside of the lower clamping group (13), and a worm (29) which is rotatably connected to the inside of the positioning block group (28) and has a rotating handle (210) fixedly connected to one end thereof away from the lower clamping group (13). The upper clamping group (12) and the lower clamping group (13) are both provided with a perpendicularity detecting group, the perpendicularity detecting group comprises two square clamping blocks (41) which are respectively clamped on the upper clamping group (12) and the lower clamping group (13), a detecting rod (42) which is arranged in each of the square clamping blocks (41), a positioning plate (43) which is fixedly connected to the outer wall of each of the detecting rods (42), a limiting strip (44) which is rotatably connected to the inside of each of the detecting rods (42), a third reset spring (45) which is fixedly connected to the outer wall of each of the limiting strips (44) and has one end thereof fixedly connected to the positioning plate (43), and a contact head (46) which is slidably connected to the inside of each of the detecting rods (42) and has a gear plate (47) fixedly connected to the inside thereof.

2. The fixed and reliable steel bar tension test device according to claim 1, characterized in that, The position adjusting rotating group further comprises a bearing disc (211) which is fixedly connected to the bottom of the threaded rod (23), three arc-shaped rods (212) which are fixedly connected to the outer wall of the bearing disc (211) in a ring shape, and an arc-shaped sliding groove (213) which is arranged in the lower clamping group (13) and in which the three arc-shaped rods (212) are slidably connected.

3. The fixed secure reinforcing bar tension testing device of claim 1, wherein, The top of the threaded rod (23) is provided with a fixing assembly, the threaded rod (23) has a positioning cylinder (31) fixedly connected to the top thereof, the positioning cylinder (31) is fixedly connected to the top of the threaded rod (23), the upper surface of the positioning cylinder (31) is fixedly connected with six fixing blocks (32) in a ring shape, and each of the fixing blocks (32) has a recessed groove sliding plate (33) slidably connected to the outer wall thereof.

4. The fixed secure reinforcing bar tension testing device of claim 3, wherein, The fixing assembly further comprises six clamping pieces (34), the six clamping pieces (34) are fixedly connected to the side, away from the fixing block (32), of the groove sliding plate (33), a second return spring (35) is fixedly connected to the outer wall of the groove sliding plate (33), and one end of the second return spring (35), away from the groove sliding plate (33), is fixedly connected to the fixing block (32).

5. The fixed secure reinforcement tension testing device of claim 1, wherein, The perpendicularity detection group further comprises a dial gauge (48), the dial gauge (48) is fixedly connected to the square clamping block (41) of the lower clamping group (13), the detection rod (42) of the upper clamping group (12) is fixedly connected to the inside of the square clamping block (41), the detection rod (42) of the lower clamping group (13) is slidingly connected to the inside of the dial gauge (48) and the square clamping block (41), and the bottom of the lower clamping group (13) is provided with an alarm lamp (49).

6. The fixed secure reinforcement tension testing device of claim 1, wherein, The worm (29) is engaged with the positioning rotary turbine (22), the disc limiting rotary rod (26) is slidingly and rotatably connected to the inside of the lower clamping group (13), one end of the first return spring (27) is fixedly connected to the lower clamping group (13), and the other end of the first return spring (27) abuts against the disc limiting rotary rod (26).

7. The fixed secure reinforcement tension testing device of claim 4, wherein, The side, away from the groove sliding plate (33), of each clamping piece (34) is provided with an anti-skid pattern, and the top of the side, away from the groove sliding plate (33), of each clamping piece (34) is provided with an inclined surface.

8. The fixed secure reinforcement tension testing device of claim 1, wherein, The limiting strip (44) abuts against the toothed plate (47), and the two abutting heads (46) are provided with arc surfaces at the ends, away from the detection rod (42).

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