A tensile testing device for reinforcing bars

Abstract

The present invention relates to the technical field of steel bar performance detection, and in particular to a steel bar tensile test detection device, which comprises two sliding seats, which can move in opposite directions, and are both provided with a rotating gear, a sleeve changing hole and two wedge blocks, and the rotating gear can rotate around its own axis; a pressing sleeve is spirally inserted in the rotating gear, and a threaded sleeve is inserted in the pressing sleeve, and the threaded sleeve is configured to be threadedly sleeved on a threaded steel bar; two wedge blocks on the same sliding seat are symmetrically and spaced, and the wedge surfaces are arranged oppositely, and the two wedge surfaces are in an eight-shaped structure; an auxiliary clamping block is provided on each wedge block, and the wedge block is sleeved on the pressing sleeve and can slide in the radial direction of the pressing sleeve, so that when the pressing sleeve moves in the axial direction, the auxiliary clamping block can slide along the wedge surface and is used to assist in clamping the threaded steel bar; the sleeve changing hole and the threaded sleeve are correspondingly arranged to facilitate the replacement of the threaded sleeve, thereby improving the test efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of steel bar mechanical property detection, in particular to a steel bar tensile test detection device. Background Art

[0002] The steel bar tensile test is an important experimental method for evaluating the mechanical properties of steel bars. It is mainly used to determine key indicators such as the yield strength, tensile strength and elongation of steel bars. These indicators reflect the plasticity and mechanical properties of steel bars during the stress process and are an important basis for evaluating the quality of steel bars.

[0003] When conducting a tensile test on steel bars, a tensile testing machine is required. In the related technology, for example, Chinese patent CN117554167B discloses a tensile testing device and a method of using the same. When the tensile testing device is in use, the two sets of guide and positioning mechanisms are tilted downward toward the middle of the guide frame, which can guide the material to be tested so that the material to be tested enters the clamp seat, thereby increasing the safety of operation. Then, the screw is rotated clockwise so that the screw pushes the movable ring and the connecting block to move to the left end, so that the guide plates on the two sets of guide and positioning mechanisms assist in clamping the upper half of the material to be tested.

[0004] Although the above-mentioned tensile testing machine can realize tensile testing of steel bars, it is found in actual use that when testing threaded steel bars with different diameters or different thread shapes, different clamping structures need to be replaced. The clamping structure is generally heavy, which makes it very laborious and inconvenient to replace the clamping structure, affecting the test efficiency. Summary of the invention

[0005] Based on this, it is necessary to provide a steel bar tensile test detection equipment to address the problem of low test efficiency of the current tensile testing machine during the tensile test of threaded steel.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A steel bar tensile test detection device, the steel bar tensile test detection device includes two sliding seats, the two sliding seats can move in directions away from or approaching each other, the surfaces of the two sliding seats approaching each other are provided with rotating gears, sleeve replacement holes and two wedge blocks, the rotating gear can rotate around its own axis; a pressing sleeve is spirally inserted in the rotating gear, the pressing sleeve can rotate around its own axis relative to the rotating gear, and can also move elastically in the axial direction relative to the rotating gear; a threaded sleeve is inserted in the pressing sleeve, the threaded sleeve can rotate synchronously with the pressing sleeve, and can also move axially relative to the pressing sleeve. , the threaded sleeve is configured to be threadedly sleeved on the threaded steel bar; the positions of the sleeve replacement hole and the threaded sleeve are arranged correspondingly to facilitate the replacement of the threaded sleeve; the two wedge blocks on the same sliding seat are symmetrical and arranged at intervals, and the wedge surfaces are arranged oppositely, and the gap width between the two wedge surfaces gradually decreases in the direction approaching the other sliding seat; each of the wedge blocks is provided with an auxiliary clamping block, the auxiliary clamping block is sleeved on the pressing sleeve, and can slide in the radial direction of the pressing sleeve, so that when the pressing sleeve moves axially, the auxiliary clamping block can slide along the wedge surface, and is configured to assist in clamping the threaded steel bar.

[0008] Furthermore, the steel bar tensile test detection equipment also includes a dot-marking mechanism, and the dot-marking mechanism is configured to be able to dot the threaded steel bar.

[0009] Furthermore, the dotting mechanism includes two dotting components, and the two dotting components are respectively arranged corresponding to the two sliding seats; the dotting component includes a slot, a sliding protrusion and a dotting pen, and the slot is opened on the wedge surface; the sliding protrusion is inserted in the auxiliary clamping block, and can elastically slide along the radial direction of the pressing sleeve, and can form a sliding fit with the slot; the dotting pen extends along the radial direction of the pressing sleeve, and can elastically slide along the radial direction of the pressing sleeve, and form a stop fit with the sliding protrusion.

[0010] Furthermore, the dotting assembly further comprises a first elastic member, wherein the first elastic member is connected between the sliding protrusion and the auxiliary clamping block, and under the action of the first elastic member, the sliding protrusion has a tendency to move in a direction away from the pressing sleeve.

[0011] Furthermore, the first elastic member is configured as a first compression spring.

[0012] Furthermore, the dotting assembly also includes a second elastic member, which is connected between the dotting pen and the pressure sleeve. Under the action of the second elastic member, the dotting pen has a tendency to move away from the pressure sleeve.

[0013] Furthermore, the second elastic member is configured as a second compression spring.

[0014] Furthermore, the steel bar tensile test detection equipment also includes two third elastic members, and the third elastic members are connected between the sliding seat and the pressing sleeve. Under the action of the third elastic members, the pressing sleeve has a tendency to move in a direction away from the sliding seat.

[0015] Furthermore, the steel bar tensile test detection equipment also includes a first transmission mechanism, and the first transmission mechanism is configured to drive the rotating gear to rotate.

[0016] Furthermore, the steel bar tensile test detection equipment also includes a second transmission mechanism, and the second transmission mechanism is configured to drive the two sliding seats to move in a direction away from or towards each other.

[0017] The beneficial effects of the present invention are:

[0018] The steel bar tensile test detection device disclosed by the present invention is used. First, the two ends of the threaded steel bar are screwed into the two threaded sleeves respectively, and then the rotating gear is driven to rotate around its own axis. The rotating gear drives the pressing sleeve to rotate and move along the threaded steel bar to the direction close to another sliding seat through the spiral cooperation between the rotating gear and the pressing sleeve. On the one hand, the pressing sleeve synchronously drives the threaded sleeve to rotate and move along the threaded steel bar to the direction close to another sliding seat, and on the other hand, it simultaneously drives two auxiliary clamping blocks to move along the wedge surface to the direction close to another sliding seat. Under the guidance of the wedge surface, the two auxiliary clamping blocks synchronously move in the direction of approaching each other to assist in clamping the threaded steel bar; then the two sliding seats are driven to move in the direction of moving away from each other, so as to stretch the threaded steel bar together through the threaded sleeve and the auxiliary clamping block; when it is necessary to perform a tensile test on different threaded steel bars, the threaded sleeve can be directly taken out of the pressing sleeve, and then taken out of the sleeve replacement hole, and then the threaded sleeve that can be threadably matched with the new threaded steel bar is inserted into the pressing sleeve from the sleeve replacement hole, and then the new threaded steel bar is assembled, so that the tensile test can be performed on the new threaded steel bar.

[0019] Furthermore, by setting up a dot-marking mechanism, the rebar can be automatically dotted when in use, thereby avoiding damage to the surface of the rebar and affecting the test structure on the one hand, and realizing an integrated structure on the other hand, which is conducive to simplifying the equipment assembly process while reducing the test operation steps and improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the three-dimensional structure of the steel bar tensile test detection equipment provided by an embodiment of the present invention when stretching threaded steel bars;

[0021] Figure 2 A schematic diagram of the front view structure of the steel bar tensile test detection device provided in an embodiment of the present invention when stretching a threaded steel bar;

[0022] Figure 3 A schematic diagram of the three-dimensional structure of the steel bar tensile test detection device provided in an embodiment of the present invention without the base, the support frame and the sliding seat when stretching the threaded steel bar;

[0023] Figure 4 A schematic diagram of the top view of the structure of the steel bar tensile test detection device provided in an embodiment of the present invention without the base, the support frame and the sliding seat when assembling threaded steel bars;

[0024] Figure 5 for Figure 4 Middle AA section view Figure 1 ;

[0025] Figure 6 for Figure 5 A schematic diagram of the partially enlarged structure at B in the middle;

[0026] Figure 7 for Figure 4 Middle AA section view Figure 2 ;

[0027] Figure 8 for Figure 7 A schematic diagram of the partially enlarged structure at C in the middle;

[0028] Fig. 9 A schematic diagram of the front view of the structure of the steel bar tensile test detection device provided by an embodiment of the present invention without the base, the support frame and the sliding seat when stretching the threaded steel bar;

[0029] Fig.10 for Fig. 9 Middle DD section view;

[0030] Fig.11 for Fig. 9 EE section view.

[0031] in:

[0032] 1. Sliding seat; 101. Sleeve replacement hole; 102. Mounting ring; 2. Rotating gear; 3. Wedge block; 301. Wedge surface; 302. Second slide groove; 4. Press sleeve; 401. Straight hole; 5. Threaded sleeve; 6. Auxiliary clamping block; 601. Semicircular groove; 602. Straight groove; 701. Slot; 702. Sliding protrusion; 703. Dotting pen; 704. First compression spring; 705. Second compression spring; 8. Third compression spring; 9. First transmission mechanism; 901. First drive motor; 902. Driving gear; 1001. Lead screw; 11. Base; 12. Support frame; 13. Threaded steel. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned herein, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] like Figures 1 to 11As shown, the steel bar tensile test detection equipment provided by the embodiment of the present invention is used to perform a tensile test on a threaded steel bar 13, and is configured to include two sliding seats 1, the two sliding seats 1 can move in a direction away from or close to each other, and the surfaces of the two sliding seats 1 close to each other are provided with a rotating gear 2, a sleeve replacement hole 101 and two wedge blocks 3, and the rotating gear 2 can rotate around its own axis; a pressing sleeve 4 is spirally inserted in the rotating gear 2, and the pressing sleeve 4 can rotate around its own axis relative to the rotating gear 2, and can also move elastically in the axial direction relative to the rotating gear 2; a threaded sleeve 5 is inserted in the pressing sleeve 4, and the threaded sleeve 5 can both rotate synchronously with the pressing sleeve 4 and can also rotate relative to the rotating gear 2. When the pressing sleeve 4 moves axially, the threaded sleeve 5 is configured to be threadedly sleeved on the threaded steel bar 13; the positions of the sleeve replacement hole 101 and the threaded sleeve 5 are correspondingly arranged to facilitate the replacement of the threaded sleeve 5; the two wedge blocks 3 on the same sliding seat 1 are symmetrical and arranged at intervals, and the wedge surfaces 301 are relatively arranged, and the gap width between the two wedge surfaces 301 gradually decreases in the direction approaching the other sliding seat 1; each wedge block 3 is provided with an auxiliary clamping block 6, the auxiliary clamping block 6 is sleeved on the pressing sleeve 4, and can slide in the radial direction of the pressing sleeve 4, so that when the pressing sleeve 4 moves axially, the auxiliary clamping block 6 can slide along the wedge surface 301, and is configured to assist in clamping the threaded steel bar 13.

[0037] Specifically in this embodiment, Figure 1 As shown, the sliding seat 1 is configured as a strip-shaped straight plate structure, and the plate surface is arranged in the horizontal direction when in use; to facilitate the installation of the sliding seat 1, the steel bar tensile test detection equipment is configured to also include a base 11 and a support frame 12, and the base 11 is placed on the ground when in use; the support frame 12 is configured as a door-shaped structure, and is vertically fixedly installed on the top of the base 11, and the sliding seat 1 is horizontally inserted into the support frame 12 during installation, and the two sliding seats 1 are arranged at intervals in the vertical direction.

[0038] Taking the sliding seat 1 located at the bottom as an example, in order to facilitate the installation of the rotating gear 2, as shown in FIG. Figure 2 As shown, a mounting ring 102 is vertically arranged at the middle of the top of the sliding seat 1, and the rotating gear 2 is vertically and coaxially arranged on the top of the mounting ring 102 and can rotate around its own axis relative to the mounting ring 102; Figure 5 As shown, the pressing sleeve 4 is set to a T-shaped structure; the threaded sleeve 5 is set to an annular structure. To facilitate the installation of the threaded sleeve 5, a columnar groove is coaxially opened at the bottom end of the pressing sleeve 4, and the threaded sleeve 5 is inserted into the columnar groove during installation; to facilitate the threaded sleeve 5 to rotate synchronously with the pressing sleeve 4 and to move axially relative to the pressing sleeve 4, a first sliding groove is opened on the circumferential side wall of the columnar groove, and the first sliding groove extends along the axial direction of the columnar groove. A first sliding bar is fixedly arranged on the outer circumferential wall of the threaded sleeve 5, and the first sliding bar extends along the axial direction of the threaded sleeve 5, and is slidably inserted into the first sliding groove during installation; to facilitate the cooperation with the large end of the pressing sleeve 4, as shown Figure 6As shown, a semicircular groove 601 is opened on the side wall surface where the right-angle side of each auxiliary clamping block 6 is located. When installing, the large end of the pressing sleeve 4 is inserted into the semicircular groove 601, and the pressing sleeve 4 can rotate around its own axis relative to the auxiliary clamping block 6, and the auxiliary clamping block 6 can slide in the radial direction relative to the pressing sleeve 4.

[0039] The sleeve changing hole 101 is formed through the plate surface of the sliding seat 1 and is located directly below the mounting ring 102 .

[0040] like Figure 2 As shown, the vertical cross-section of the wedge block 3 is set to a right-angled isosceles trapezoid, and the long base of the wedge block 3 is above the short base, the bottom surface where the short base is located coincides with the top of the sliding seat 1 and is fixedly arranged, the right-angled side is located on the outside, the hypotenuse is located on the inside, and the oblique side wall surface where the hypotenuse is located is the wedge surface 301, and the wedge surfaces 301 of the two wedge blocks 3 on the same sliding seat 1 together form an eight-shaped structure, and the small mouth of the eight-shaped structure is on the top and the large mouth is on the bottom.

[0041] like Figure 2 As shown, the vertical cross-section of the auxiliary clamping block 6 is set to be a right-angled isosceles trapezoid, and the long base of the auxiliary clamping block 6 is below the short base, the right-angled side is located on the inside, the hypotenuse is located on the outside, and the oblique side wall where the hypotenuse is located is parallel to the wedge surface 301 of the wedge block 3 where the auxiliary clamping block 6 is located; in order to facilitate the auxiliary clamping block 6 to slide along the wedge surface 301, as shown in FIG. Figure 3 As shown, a second slide groove 302 is opened on the wedge surface 301 of the wedge block 3, and the second slide groove 302 is set to a sink groove structure and a T-shape. The second slide groove 302 extends along the extension direction of the wedge surface 301, and second slide bars are set on the side wall surfaces where the two oblique edges of the auxiliary clamping block 6 are located. The second slide bar extends along the extension direction of the wedge surface 301 and is slidably inserted in the second slide groove 302 during installation.

[0042] During use, the threaded steel bar 13 is first placed vertically between the two sliding seats 1, and then the two sliding seats 1 are driven to move in a direction approaching each other, and the threaded steel bar 13 is driven to rotate, so that the two ends of the threaded steel bar 13 are gradually screwed into the two threaded sleeves 5; then the rotating gear 2 is driven to rotate around its own axis, and the rotating gear 2 drives the pressing sleeve 4 to rotate and move along the threaded steel bar 13 toward the other sliding seat 1 through the spiral cooperation between the rotating gear 2 and the pressing sleeve 4. On the one hand, the pressing sleeve 4 synchronously drives the threaded sleeve 5 to rotate and move along the threaded steel bar 13 toward the other sliding seat 1, and on the other hand, it simultaneously drives the two auxiliary clamping blocks 6 to move along the wedge surface 301 toward the other sliding seat 1. Under the guidance of the wedge surface 301, the two auxiliary clamping blocks 6 synchronously move in a direction approaching each other to assist in clamping the threaded steel bar 13; then the two sliding seats 1 are driven to move in a direction away from each other, so as to stretch the threaded steel bar 13 together through the threaded sleeve 5 and the auxiliary clamping blocks 6.

[0043] When it is necessary to perform a tensile test on different threaded steel bars 13, the threaded sleeve 5 can be directly taken out from the pressing sleeve 4 and then taken out from the sleeve replacement hole 101, and then the threaded sleeve 5 that can be threadedly matched with the new threaded steel bar 13 is inserted into the pressing sleeve 4 from the sleeve replacement hole 101, and then the new threaded steel bar 13 is assembled, and the tensile test can be performed on the new threaded steel bar 13.

[0044] In a further embodiment, before the tensile test of existing steel bars, points are often marked on the surface of the steel bars in order to measure the elongation of the steel bars after stretching. Marking points is equivalent to marking the original distance reference points on the surface of the steel bars. During the test, as the steel bars are gradually stretched, the spacing between these points will change. By measuring the spacing between the points before and after stretching, the elongation of the steel bars can be accurately calculated, and then the elongation value can be obtained, thereby evaluating the ability of the steel bars to plastically deform under stress.

[0045] When marking the surface of steel bars, the traditional manual marking method often relies on sharp tools. If the operation is not careful, it is easy to scratch and cause pits on the surface of the steel bars. These minor damages will change the local stress distribution of the steel bars, interfere with the force conduction during the tensile test, and ultimately cause deviations in the test data. The automatic marking method of mechanical equipment, due to the separate structure from the steel bar tensile test detection equipment, increases the test steps and affects the test efficiency. To solve this problem, the steel bar tensile test detection equipment is configured to also include a marking mechanism, and the marking mechanism is configured to be able to mark points on the rebar 13.

[0046] Specifically in this embodiment, the threaded steel bar 13 can be automatically dotted by the dotting mechanism, which can avoid damage to the surface of the threaded steel bar 13 and affect the test structure on the one hand, and can achieve an integrated structure on the other hand, which is conducive to simplifying the equipment assembly process while reducing the test operation steps and improving the test efficiency.

[0047] In a further embodiment, the dotting mechanism is configured to include two dotting components, and the two dotting components are respectively arranged corresponding to the two sliding seats 1; the dotting components include a slot 701, a sliding protrusion 702 and a dotting pen 703, and the slot 701 is opened on the wedge surface 301; the sliding protrusion 702 is inserted into the auxiliary clamp 6, and can elastically slide along the radial direction of the pressing sleeve 4, and can form a sliding fit with the slot 701; the dotting pen 703 extends along the radial direction of the pressing sleeve 4, and can elastically slide along the radial direction of the pressing sleeve 4, and form a stop fit with the sliding protrusion 702.

[0048] Specifically in this embodiment, Figure 5 As shown, the slot 701 extends along the extension direction of the wedge surface 301; Figure 6As shown, the sliding protrusion 702 is arranged as a T-shaped round rod structure, and is horizontally arranged with the large end facing outward during installation; to facilitate the installation of the sliding protrusion 702, a straight groove 602 is horizontally opened on the inclined side wall where the inclined edge of the auxiliary clamping block 6 is located, the straight groove 602 is connected to the semicircular groove 601, and the sliding protrusion 702 is elastically slidably inserted in the straight groove 602 during installation; the dotting pen 703 is arranged as an I-shaped round rod structure, and is horizontally arranged during installation; to facilitate the installation of the dotting pen 703, a straight hole 401 is horizontally opened on the large end of the pressing sleeve 4, the straight hole 401 is connected to the semicircular groove 601, and the dotting pen 703 is elastically slidably inserted in the straight hole 401 during installation, and the outer end of the dotting pen 703 abuts against the inner end of the sliding protrusion 702.

[0049] During use, the threaded steel bar 13 is first placed vertically between the two sliding seats 1, and then the threaded steel bar 13 is driven to move upward while rotating on itself to be screwed into the threaded sleeve 5 located above; then the rotating gear 2 located above is driven to rotate forward around its own axis, and the rotating gear 2 drives the pressing sleeve 4 to move downward along the threaded steel bar 13 while rotating through the spiral cooperation between the rotating gear 2 and the pressing sleeve 4. On the one hand, the pressing sleeve 4 synchronously drives the threaded sleeve 5 to move downward while rotating, and on the other hand, it simultaneously drives the two auxiliary clamping blocks 6 to move downward along the wedge surface 301 respectively. Under the guidance of the wedge surface 301, the two auxiliary clamping blocks 6 synchronously move towards each other to assist in clamping the threaded steel bar 13.

[0050] During the rotation of the pressing sleeve 4 located above, the pressing sleeve 4 synchronously drives the dotting pen 703 to rotate. Since the auxiliary clamping block 6 is moving downward at this time, the sliding protrusion 702 can cooperate with the slot 701; when the sliding protrusion 702 moves to cooperate with the slot 701, the sliding protrusion 702 can extend out of the straight groove 602 under the action of elasticity, and the dotting pen 703 extends into the straight groove 602 under the action of elasticity, so that the pressing sleeve 4 and the auxiliary clamping block 6 cannot rotate relative to each other, thereby improving the stability when stretching the threaded steel bar 13.

[0051] Then the sliding seat 1 located below is driven to move upward, and at the same time, the threaded steel bar 13 is driven to rotate, so that the threaded steel bar 13 is screwed into the threaded sleeve 5 located below; when the sliding seat 1 located below moves upward to the first set position, it drives the sliding seat 1 located below to move downward, and at the same time, the rotating gear 2 located below is driven to rotate in the opposite direction around its own axis, and the rotating gear 2 drives the pressing sleeve 4 to move downward along the threaded steel bar 13 while rotating through the spiral cooperation between the pressing sleeve 4. On the one hand, the pressing sleeve 4 synchronously drives the threaded sleeve 5 to move downward while rotating, and on the other hand, it simultaneously drives the two auxiliary clamps 6 to move downward along the wedge surface 301 respectively. Under the guidance of the wedge surface 301, the two auxiliary clamps 6 synchronously move away from each other.

[0052] During the rotation of the pressing sleeve 4 located below, the pressing sleeve 4 synchronously drives the dotting pen 703 to rotate. Since the auxiliary clamp 6 moves downward at this time, the sliding protrusion 702 is always coordinated with the wedge surface 301, so that the sliding protrusion 702 is always in a state of being retracted into the straight groove 602. Therefore, when the dotting pen 703 and the sliding protrusion 702 contact, the dotting pen 703 can move inward along the radial direction of the pressing sleeve 4 under the push of the sliding protrusion 702, and dot the threaded steel bar 13. Since the dotting pen 703 moves downward synchronously with the sliding seat 1 located below, the dotting pen 703 can make a row of dots on the threaded steel bar 13.

[0053] When the sliding seat 1 located below moves downward to the second set position, it drives the rotating gear 2 located below to rotate forward around its own axis. The rotating gear 2 drives the pressing sleeve 4 to move upward along the threaded steel bar 13 while rotating through the spiral cooperation with the pressing sleeve 4. On the one hand, the pressing sleeve 4 synchronously drives the threaded sleeve 5 to move upward while rotating, and on the other hand, it drives the two auxiliary clamping blocks 6 to move upward along the wedge surface 301 respectively. Under the guidance of the wedge surface 301, the two auxiliary clamping blocks 6 synchronously move towards each other to assist in clamping the threaded steel bar 13.

[0054] Then, the two sliding seats 1 are driven to move in the direction away from each other, so that the threaded steel bar 13 is stretched together by the threaded sleeve 5 and the auxiliary clamping block 6 .

[0055] In a further embodiment, in order to facilitate the elastic sliding of the sliding protrusion 702, the dotting assembly is configured to also include a first elastic member, which is connected between the sliding protrusion 702 and the auxiliary clamping block 6. Under the action of the first elastic member, the sliding protrusion 702 tends to move away from the pressing sleeve 4.

[0056] Specifically in this embodiment, the first elastic member is configured as a first compression spring 704; Figure 6 As shown, in order to facilitate the installation of the first compression spring 704, a first retaining ring is fixedly provided on the circumferential side wall of the straight groove 602 near the inner end. When installed, the first compression spring 704 is horizontally inserted into the straight groove 602, and the inner end abuts against the outer end surface of the first retaining ring, and the outer end abuts against the large end of the sliding protrusion 702. Under the action of the first compression spring 704, the sliding protrusion 702 has a tendency to extend outward.

[0057] In other embodiments, in order to facilitate the elastic sliding of the dotting pen 703, the dotting assembly is configured to also include a second elastic member, which is connected between the dotting pen 703 and the pressure sleeve 4. Under the action of the second elastic member, the dotting pen 703 tends to move away from the pressure sleeve 4.

[0058] Specifically in this embodiment, the second elastic member is configured as a second compression spring 705; Figure 6As shown, in order to facilitate the installation of the second compression spring 705, a second retaining ring is fixedly provided on the circumferential side wall of the straight hole 401 near the outer end. When installing, the first compression spring 704 is horizontally inserted into the straight hole 401, and the inner end abuts against the outer end surface of the second retaining ring, and the outer end abuts against the dotting pen 703. Under the action of the second compression spring 705, the dotting pen 703 has a tendency to extend outward.

[0059] In other embodiments, in order to facilitate the elastic sliding of the pressing sleeve 4, the steel bar tensile test detection equipment is configured to also include two third elastic members, and the third elastic members are connected between the sliding seat 1 and the pressing sleeve 4. Under the action of the third elastic members, the pressing sleeve 4 has a tendency to move away from the sliding seat 1.

[0060] Specifically in this embodiment, the third elastic member can be set as a third compression spring 8; Figure 5 As shown, the third compression spring 8 is vertically arranged during installation and inserted into the mounting ring 102. One end of the third compression spring 8 abuts against the pressing sleeve 4, and the other end abuts against the sliding seat 1. Under the action of the third compression spring 8, the pressing sleeve 4 has a tendency to move away from the sliding seat 1. Therefore, when the rotating gear 2 rotates, the pressing sleeve 4 can rotate relative to the rotating gear 2 and move axially relative to the rotating gear 2 under the push of the third compression spring 8.

[0061] In other embodiments, the steel bar tensile test detection equipment is configured to further include a first transmission mechanism 9, and the first transmission mechanism 9 is configured to drive the rotating gear 2 to rotate.

[0062] Specifically in this embodiment, the first transmission mechanism 9 is configured to include two first drive motors 901 and two driving gears 902. Figure 3 As shown, taking the first driving motor 901 located at the top as an example, the motor shaft of the first driving motor 901 is set downward when installed, and the driving gear 902 is fixedly sleeved on the motor shaft of the first driving motor 901 and meshed with the rotating gear 2. The first driving motor 901 is set on the sliding seat 1 when installed, so that when in use, the driving gear 902 is driven to rotate by the first driving motor 901, which is convenient for driving the rotating gear 2 to rotate.

[0063] In other embodiments, the steel bar tensile test detection equipment is configured to further include a second transmission mechanism, and the second transmission mechanism is configured to be able to drive the two sliding seats 1 to move in a direction away from or towards each other.

[0064] Specifically in this embodiment, the second transmission mechanism can be configured to include two hydraulic cylinders. When installed, one of the two hydraulic cylinders is inserted into the base 11, and the output shaft is vertically arranged upward and fixed to the bottom of the sliding seat 1 located below; the other is inserted into the support frame 12, and the output shaft is vertically arranged downward and fixed to the top of the sliding seat 1 located above, so that when in use, the sliding seat 1 can be driven to move upward or downward by the output shaft of the hydraulic cylinder, so as to facilitate driving the two sliding seats 1 to move in a direction away from or close to each other.

[0065] In other embodiments, the second transmission mechanism may also be configured to include two lead screws 1001 and two second drive motors, such as Figure 1 As shown, the lead screw 1001 is vertically placed in the support frame 12 during installation, and the two lead screws 1001 are coaxially arranged one above and one below; the two sliding seats 1 are respectively sleeved on the two lead screws 1001 during installation, and form a transmission match with the lead screws 1001 respectively; when the two second drive motors are installed, one of them is inserted in the base 11, and the motor shaft is vertically arranged upward and fixed to the bottom end of the lead screw 1001 located below; the other is inserted in the support frame 12, and the output shaft is vertically arranged downward and fixed to the top end of the lead screw 1001 located above, so that when in use, the lead screw 1001 can be driven to rotate by the second drive motor, so as to drive the two sliding seats 1 to move in a direction away from or close to each other.

[0066] In other embodiments, in order to improve the connection stability between the pressing sleeve 4 and the auxiliary clamping block 6, as shown in FIG. Fig. 9 As shown, a plurality of fixing blocks are fixedly arranged on the outer peripheral wall of the pressing sleeve 4 , and the plurality of fixing blocks are evenly arranged along the circumferential direction and are stopped on the end surface where the long bottom edge of the auxiliary clamping block 6 is located.

[0067] In combination with the above embodiments, the use principle and working process of the embodiments of the present invention are as follows:

[0068] First, the threaded steel bar 13 is vertically placed between the two sliding seats 1, and then the threaded steel bar 13 is driven to move upward while rotating so as to be screwed into the threaded sleeve 5 located above; then the first driving motor 901 located above is started, and the first driving motor 901 drives the rotating gear 2 to rotate forward through the active gear 902. The rotating gear 2 is spirally matched with the pressing sleeve 4, and drives the pressing sleeve 4 to move downward along the threaded steel bar 13 while rotating under the push of the third compression spring 8. On the one hand, the pressing sleeve 4 synchronously drives the threaded sleeve 5 to move downward while rotating, and on the other hand, it simultaneously drives the two auxiliary clamping blocks 6 to move downward along the wedge surface 301 respectively. Under the guidance of the wedge surface 301, the two auxiliary clamping blocks 6 synchronously move towards each other to assist in clamping the threaded steel bar 13.

[0069] During the rotation of the pressing sleeve 4 located above, the pressing sleeve 4 synchronously drives the marking pen 703 to rotate. Since the auxiliary clamping block 6 is moving downward at this time, the sliding protrusion 702 can cooperate with the slot 701; when the sliding protrusion 702 moves to cooperate with the slot 701, the sliding protrusion 702 extends out of the straight groove 602 under the push of the first compression spring 704, and the marking pen 703 extends into the straight groove 602 under the push of the second compression spring 705, so that the pressing sleeve 4 and the auxiliary clamping block 6 cannot rotate relative to each other, thereby improving the stability when stretching the threaded steel bar 13.

[0070] Then the hydraulic cylinder located below is started, and the output shaft of the hydraulic cylinder extends out, synchronously driving the sliding seat 1 located below to move upward, and at the same time driving the threaded steel 13 to rotate, so that the threaded steel 13 is screwed into the threaded sleeve 5 located below; when the sliding seat 1 located below moves upward to the first set position, it drives the sliding seat 1 located below to move downward, and at the same time starts the first driving motor 901 located below, and the first driving motor 901 drives the rotating gear 2 located below to rotate in the opposite direction through the active gear 902. The rotating gear 2 is spirally matched with the pressing sleeve 4, and drives the pressing sleeve 4 to rotate and move downward along the threaded steel 13 under the push of the third compression spring 8. On the one hand, the pressing sleeve 4 synchronously drives the threaded sleeve 5 to rotate and move downward, and on the other hand, it simultaneously drives the two auxiliary clamping blocks 6 to move downward along the wedge surface 301 respectively. Under the guidance of the wedge surface 301, the two auxiliary clamping blocks 6 move synchronously in a direction away from each other.

[0071] During the rotation of the pressing sleeve 4 located below, the pressing sleeve 4 synchronously drives the dotting pen 703 to rotate. Since the auxiliary clamp 6 moves downward at this time, the sliding protrusion 702 is always coordinated with the wedge surface 301, so that the sliding protrusion 702 is always in a state of being retracted into the straight groove 602. Therefore, when the dotting pen 703 and the sliding protrusion 702 contact, the dotting pen 703 can move inward along the radial direction of the pressing sleeve 4 under the push of the sliding protrusion 702, and dot the threaded steel bar 13. Since the dotting pen 703 moves downward synchronously with the sliding seat 1 located below, the dotting pen 703 can make a row of dots on the threaded steel bar 13.

[0072] When the sliding seat 1 located below moves downward to the second set position, the first driving motor 901 located below is started. The first driving motor 901 drives the rotating gear 2 located below to rotate in the positive direction through the active gear 902. The rotating gear 2 drives the pressing sleeve 4 to rotate and move upward along the threaded steel bar 13 through the spiral cooperation between the pressing sleeve 4. On the one hand, the pressing sleeve 4 synchronously drives the threaded sleeve 5 to rotate and move upward, and on the other hand, it simultaneously drives the two auxiliary clamping blocks 6 to move upward along the wedge surface 301 respectively. Under the guidance of the wedge surface 301, the two auxiliary clamping blocks 6 synchronously move towards each other to assist in clamping the threaded steel bar 13.

[0073] Then the two hydraulic cylinders are started, and the output shafts of the two hydraulic cylinders are retracted, synchronously driving the two sliding seats 1 to move in directions away from each other, so as to stretch the threaded steel bar 13 through the threaded sleeve 5 and the auxiliary clamping block 6.

[0074] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A steel bar tensile test detection equipment, characterized in that: The steel bar tensile test detection equipment includes two sliding seats, and the two sliding seats can move in directions away from or close to each other. The surfaces of the two sliding seats close to each other are provided with rotating gears, sleeve replacement holes and two wedge blocks. The rotating gear can rotate around its own axis; a pressing sleeve is spirally inserted in the rotating gear, and the pressing sleeve can rotate around its own axis relative to the rotating gear, and can also move elastically in the axial direction relative to the rotating gear; a threaded sleeve is inserted in the pressing sleeve, and the threaded sleeve can rotate synchronously with the pressing sleeve, and can also move axially relative to the pressing sleeve. The threaded sleeve is equipped with a threaded sleeve. The screw threaded steel bar is arranged to be threadedly sleeved on the screw threaded steel bar; the sleeve replacement hole and the screw threaded sleeve are arranged correspondingly to facilitate the replacement of the screw threaded steel bar; the two wedge blocks on the same sliding seat are symmetrically and spaced apart, and the wedge surfaces are arranged opposite to each other, and the gap width between the two wedge surfaces gradually decreases in the direction close to the other sliding seat; each of the wedge blocks is provided with an auxiliary clamping block, which is sleeved on the pressing sleeve and can slide in the radial direction of the pressing sleeve, so that when the pressing sleeve moves in the axial direction, the auxiliary clamping block can slide along the wedge surface, and is configured to assist in clamping the screw threaded steel bar; The steel bar tensile test detection equipment further comprises a dot-marking mechanism, wherein the dot-marking mechanism is configured to be able to dot-mark the threaded steel bar; The dotting mechanism comprises two dotting components, and the two dotting components are respectively arranged corresponding to the two sliding seats; the dotting component comprises a slot, a sliding protrusion and a dotting pen, and the slot is arranged on the wedge surface; the sliding protrusion is inserted into the auxiliary clamping block, and can slide elastically along the radial direction of the pressing sleeve, and can form a sliding fit with the slot; the dotting pen extends along the radial direction of the pressing sleeve, and can slide elastically along the radial direction of the pressing sleeve, and form a stop fit with the sliding protrusion; The dotting assembly further includes a first elastic member, the first elastic member is connected between the sliding protrusion and the auxiliary clamping block, and under the action of the first elastic member, the sliding protrusion has a tendency to move away from the pressing sleeve; The dotting assembly also includes a second elastic member, which is connected between the dotting pen and the pressure sleeve. Under the action of the second elastic member, the dotting pen has a tendency to move away from the pressure sleeve.

2. The steel bar tensile test detection equipment according to claim 1, characterized in that: The first elastic member is configured as a first compression spring.

3. The steel bar tensile test detection equipment according to claim 1, characterized in that: The second elastic member is configured as a second compression spring.

4. The steel bar tensile test detection equipment according to claim 1, characterized in that: The steel bar tensile test detection equipment also includes two third elastic members, which are connected between the sliding seat and the pressing sleeve. Under the action of the third elastic members, the pressing sleeve has a tendency to move away from the sliding seat.

5. The steel bar tensile test detection equipment according to claim 1, characterized in that: The steel bar tensile test detection equipment also includes a first transmission mechanism, and the first transmission mechanism is configured to drive the rotating gear to rotate.

6. The steel bar tensile test detection equipment according to claim 1, characterized in that: The steel bar tensile test detection equipment also includes a second transmission mechanism, which is configured to drive the two sliding seats to move in a direction away from or towards each other.

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