Fixing device and testing method for centering and adjusting distance of steel fiber tensioning clamp

Abstract

The present invention belongs to the technical field of testing the mechanical properties of steel fibers. A fixing device for centering and adjusting the distance of a steel fiber tensioning clamp is disclosed, comprising a support platform, a fixing unit, a workbench and a clamping unit, wherein the fixing unit is used to fix the support platform on a base platform; two workbenches are relatively arranged on the support platform left and right, and a sliding locking unit is arranged on the support platform, wherein the sliding locking unit is used to adjust the distance between the two workbenches and fix the workbench and the support platform; a clamping unit is correspondingly arranged on each of the workbenches, and the clamping unit is used to fix the steel fiber tensioning clamp. A steel fiber tensioning test method is also disclosed. The structural design of the present application is reasonable, and can realize effective centering, positioning and clamping of steel fibers, avoid non-directional tension, compression and torsion of steel fibers during clamping, and improve the accuracy of detection.

Description

Technical Field

[0001] The invention belongs to the technical field of steel fiber mechanical property testing, and in particular relates to a fixing device and a testing method for centering and adjusting the distance of a steel fiber tensioning and clamping fixture. Background Art

[0002] In order to accurately test the various physical performance indicators of steel fibers, especially mechanical indicators such as tensile strength, elastic modulus and ultimate elongation, it is necessary to conduct direct tensile performance tests of steel fibers. In order to better cooperate with a steel fiber tensioning clamping fixture and a steel fiber tensile performance testing system (CN 105486592 A) previously invented by the inventor, to achieve faster and more efficient testing of the mechanical properties of steel fibers, and to avoid repeated tension, compression and twisting of the steel fiber by the tensioning clamping fixture during the process of clamping the steel fiber and installing the steel fiber tensioning clamping fixture, so that the steel fiber is subjected to fatigue stress, thereby causing varying degrees of damage to the steel fiber, so that the test value is not the actual tensile strength of the steel fiber, and even causes the steel fiber to break and damage in advance, reducing the success rate of the test, it is necessary to develop a fixing device with a simple structure and easy operation for centering and adjusting the distance of the steel fiber tensioning clamping fixture. Summary of the invention

[0003] The purpose of the present invention is to address the above-mentioned problems and shortcomings and to provide a fixing device and a testing method for centering and adjusting the distance of a steel fiber tensioning clamping fixture. The device has a reasonable structural design and can achieve effective centering, positioning and clamping of the steel fiber, avoid non-directional tension, compression and torsion of the steel fiber during the clamping process, and improve the accuracy of detection.

[0004] To achieve the above purpose, the technical solution adopted is:

[0005] A fixing device for centering and adjusting the distance of a steel fiber tensioning clamping fixture, comprising:

[0006] Support table;

[0007] A fixing unit, the fixing unit is used to fix the support platform on the base platform;

[0008] A workbench, wherein the two workbench are arranged on the support platform opposite to each other, and a sliding locking unit is arranged on the support platform, and the sliding locking unit is used to adjust the distance between the two workbench and fix the workbench and the support platform; and

[0009] A clamping unit is correspondingly arranged on each of the workbenches, and the clamping unit is used to fix the steel fiber tensioning clamping fixture.

[0010] According to the fixing device for centering and adjusting the distance of the steel fiber tensioning clamp of the present invention, preferably, the fixing unit comprises:

[0011] Base plate;

[0012] A connecting block, a plurality of connecting blocks are fixed on the basic platform, a first screw hole is provided on the connecting block, and the bottom plate is matched and supported on the connecting block;

[0013] first bolts, a plurality of the first bolts are arranged on the bottom plate, and the first bolts are connected to the first screw holes correspondingly; and

[0014] A limit locking unit, wherein the support platform is supported on the bottom plate, and the limit locking unit is arranged between the support platform and the bottom plate, and the limit locking unit is used to constrain the position of the support platform on the bottom plate and fix the support platform and the bottom plate.

[0015] According to the fixing device for centering and adjusting the distance of the steel fiber tensioning clamp of the present invention, preferably, the limit locking unit comprises:

[0016] A first limiting baffle, which is arranged on one side of the bottom plate;

[0017] A second limit baffle is arranged on the other side of the bottom plate, and the first limit baffle and the second limit baffle are arranged opposite to each other; and

[0018] A second bolt is used to fix the support platform and the base plate.

[0019] According to the fixing device for centering and adjusting the distance of the steel fiber tensioning clamp of the present invention, preferably, one of the first limit baffle and the second limit baffle is provided with a second bolt, the second bolt is connected to the top support of the end surface of the support platform, or is correspondingly connected to the second screw hole provided on the end surface of the support platform, and the upper part of the other is provided with an upper pressure plate that fits the upper end surface of the support platform; or

[0020] The support platform is provided with a plurality of second bolts, and the bottom plate is provided with third screw holes corresponding to the second bolts; or

[0021] The first limit baffle and the second limit baffle are both provided with a second bolt, and the end surface of the support platform is provided with a fourth screw hole corresponding to the second bolt.

[0022] According to the fixing device for centering and adjusting the distance of the steel fiber tensioning clamp of the present invention, preferably, an anti-slip block is also provided on the bottom plate, and the anti-slip block forms a positioning groove surrounded on three sides with the first limit baffle and the second limit baffle.

[0023] According to the fixing device for centering and adjusting the distance of the steel fiber tensioning clamp of the present invention, preferably, the upper end surface of the base plate includes supporting end surfaces located at both ends and a fixed end surface located in the middle, and the fixed end surface is a sunken groove structure.

[0024] According to the fixing device for centering and adjusting the distance of the steel fiber tensioning clamp of the present invention, preferably, the sliding locking unit comprises:

[0025] A chute, the chute is arranged on the support platform, and the width of the chute body is greater than the width of the chute opening;

[0026] A slider, the slider is arranged on the workbench, and the slider is matched and slidably arranged in the slide groove; and

[0027] A third bolt is used to fix the workbench and the supporting platform.

[0028] The slide groove is a dovetail groove; or

[0029] The slide groove is a rectangular groove, an anti-slip groove is arranged on the side of the slide groove, and an anti-slip side sliding plate corresponding to the anti-slip groove is arranged on the sliding block.

[0030] According to the fixing device for centering and adjusting the distance of the steel fiber tensioning clamping fixture of the present invention, preferably, the clamping unit includes a fixed clamping block, a fixed platform and a clamping screw, the fixed clamping block is arranged at the first end of the workbench, the fixed platform is arranged at the second end of the workbench, the clamping screw is connected to the fixed platform by a thread, and the end of the clamping screw is provided with a movable clamping block corresponding to the fixed clamping block.

[0031] A steel fiber tensioning test method, using the steel fiber tensioning clamping fixture as described above to test the centering and spacing fixing device, specifically comprises the following steps:

[0032] Assemble the workbench and the support platform, and fix the support platform on the basic platform through the fixing unit;

[0033] Install the clamping unit on the workbench, fix the steel fiber tensioning clamp on the workbench, adjust the workbench, determine the length of the steel fiber, and then fix the workbench to the support table;

[0034] Drive the steel fiber tensioning clamp to anchor the steel fiber specimen;

[0035] Loosen the fixing unit, remove the support platform from the base platform, and connect the tension rod of the steel fiber tensioning clamp to the load sensor;

[0036] Release the clamping unit, separate the clamping unit and the steel fiber tensioning clamp, and take away the support table and the workbench;

[0037] Conduct tension test, read load sensor data and record.

[0038] The beneficial effects achieved by adopting the above technical solution are:

[0039] The structural design of the present application is reasonable, and can achieve effective centering, positioning and clamping of the steel fibers to prevent the steel fiber tensioning and clamping fixture from repeatedly pulling, pressing and twisting the steel fibers, avoiding fatigue stress on the steel fiber specimens during the installation stage, and keeping the steel fibers on the same horizontal line at all times during the installation stage to prevent bending and torsional stresses. The setting of the support table of the present application can facilitate positioning, installation and disassembly, ensure that the position will not be moved during the support and tensioning process of the steel fiber, improve the convenience of steel fiber operation and the convenience of connection in the subsequent detection process; the setting of the support table and the workbench of the present application is more convenient to adjust the distance between the two workbenches, so as to meet the requirements for the length of the steel fiber specimen, and the setting of the sliding limit unit can not only make the workbench and the support table easier to assemble and disassemble, but also improve the stability of its structure, make the sliding smoother, and make it easier to fix after adjustment, which is highly practical; the setting of the clamping unit of the present application is convenient for operation on the one hand, and will not interfere with the subsequent disassembly of the steel fiber tensioning clamping fixture on the other hand, which is more convenient to separate the workbench and the support table from the steel fiber tensioning clamping fixture during the tensioning test; the fixing unit of the present application can make the assembly more editable and more convenient to split at different stages by adding a bottom plate, so that there is less interference during the operation, it is more convenient and quicker, and more practical, which can minimize the impact of the steel fiber installation process and fully guarantee the reliability of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention, wherein the drawings are only used to illustrate some embodiments of the present invention, but not to limit all embodiments of the present invention thereto.

[0041] Figure 1 It is a schematic structural diagram of a fixing device for centering and adjusting the distance of a steel fiber tensioning and clamping fixture according to an embodiment of the present invention.

[0042] Figure 2 Schematic diagram of the disassembled structure of the base plate according to an embodiment of the present invention.

[0043] Figure 3 Schematic diagram of the structure of a support platform according to an embodiment of the present invention.

[0044] Figure 4 FIG. 1 is a schematic diagram of the structure of a workbench according to an embodiment of the present invention.

[0045] Figure 5 This is a second schematic diagram of the structure of a workbench according to an embodiment of the present invention.

[0046] Figure 6 The figure is a schematic diagram of the assembly structure of the steel fiber tensioning and clamping fixture according to an embodiment of the present invention.

[0047] Figure 7 The figure is a schematic diagram of the assembly structure of the steel fiber tensioning clamp and the support platform according to an embodiment of the present invention.

[0048] Serial number in the picture:

[0049] 100 is a bottom plate, 101 is a connecting block, 102 is a first bolt, 103 is a first screw hole, 104 is a first limit baffle, 105 is a second limit baffle, 106 is a second bolt, 107 is an anti-slip block, 108 is an upper pressure plate, 109 is a second screw hole, 110 is a supporting end surface, and 111 is a fixed end surface;

[0050] 200 is a support platform, 201 is a slide slot, and 202 is an anti-slip slot;

[0051] 300 is a workbench, 301 is a slide block, 302 is a third bolt, and 303 is an anti-slip side slide plate;

[0052] 400 is a clamping unit, 401 is a fixed clamping block, 402 is a fixed platform, 403 is a clamping screw, and 404 is a movable clamping block;

[0053] 510 is a steel fiber tensioning clamp, 520 is a steel fiber, 530 is a load sensor, and 540 is a tensioning rod. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings of specific embodiments of the present invention to clearly and completely describe the exemplary scheme of the embodiment of the present invention. Unless otherwise defined, the technical terms or scientific terms used in the present invention should be the common meanings understood by people with ordinary skills in the field.

[0055] In the description of the present invention, it should be understood that the expressions “first” and “second” are used to describe the various elements of the present invention and do not represent any limitation of order, quantity or importance, but are only used to distinguish one component from another.

[0056] It should be noted that when one element is “connected”, “coupled” or “connected” to another element, it may mean that they are directly connected, coupled or connected, but it should be understood that there may be intermediate elements between the two; that is, the positional relationships of direct connection and indirect connection are covered.

[0057] It should be noted that the use of "a" or "an" and similar words does not necessarily indicate a quantitative limitation. "Include" or "comprising" and similar words mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects.

[0058] It should be noted that terms such as "up", "down", "left" and "right" indicating orientation or positional relationship are only used to indicate relative positional relationship. This is for the convenience of describing the present invention and does not mean that the device or element must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0059] A fixing device for centering and adjusting the distance of a steel fiber tensioning clamping fixture comprises a support platform 200, a fixing unit, a workbench 300 and a clamping unit, wherein the fixing unit is used to fix the support platform 200 on a base platform; two workbenches 300 are arranged on the support platform 200 relatively to each other, and a sliding locking unit is arranged on the support platform 200, and the sliding locking unit is used to adjust the distance between the two workbenches 300 and fix the workbench 300 and the support platform 200; a clamping unit is correspondingly arranged on each of the workbenches 300, and the clamping unit 400 is used to fix the steel fiber tensioning clamping fixture 510.

[0060] In the above structure, in order to improve the disassembly and assembly performance between the overall structure and the base platform, and to facilitate assembly and disassembly after subsequent clamping, the fixing unit of the present application includes a base plate 100, a connecting block 101, a first bolt 102 and a limit locking mechanism, a plurality of connecting blocks 101 are fixed on the base platform, a first screw hole 103 is provided on the connecting block 101, and the base plate 100 is matched and supported on the connecting block 101; a plurality of the first bolts 102 are provided on the base plate 100, and the first bolts 102 are correspondingly connected to the first screw holes 103; the support platform 200 is supported and arranged on the base plate 100, and the limit locking unit is provided between the support platform 200 and the base plate 100, and the limit locking unit is used to constrain the position of the support platform on the base plate 100 and fix the support platform 200 and the base plate 100.

[0061] The connecting block can be an integrated structure with the base platform, with a supporting plane provided on the upper part of the connecting block, and the bottom plate is supported on the supporting plane. Alternatively, a boss can be provided at the lower part of the bottom plate in a structure as shown in the figure, and the boss and the connecting block are supported and fitted one by one, and then connected by a first bolt.

[0062] The limit locking unit of the present application includes a first limit baffle 104, a second limit baffle 105 and a second bolt 106. The first limit baffle 104 is arranged on one side of the base plate 100; the second limit baffle 105 is arranged on the other side of the base plate 100, and the first limit baffle 104 and the second limit baffle 105 are arranged opposite to each other; the second bolt 106 is used to fix the support platform 200 and the base plate 100.

[0063] Regarding the positional relationship and specific structure between the limiting baffle and the second bolt, the present application provides three different arrangements: Form 1: Among the first limiting baffle 104 and the second limiting baffle 105, one of them is provided with a second bolt 106, and the end surface of the support platform 200 is provided with a second screw hole 109 corresponding to the second bolt 106, and the upper part of the other is provided with an upper pressing plate 108 that fits with the upper end surface of the support platform 200. The above structure is the structure shown in the accompanying drawings, one end of the support platform is matched and inserted in the groove body composed of the upper pressing plate and the first limiting baffle, the second end of the support platform fits with the second limiting baffle, and the second limiting baffle and the support platform are connected and fixed by the second bolt. In this structure, the first limiting baffle and the second limiting baffle are both L-shaped structures, so that the two ends of the support platform are laid on the horizontal sides of the first limiting baffle and the second limiting baffle, and a sunken groove structure is formed between the two limiting baffles and the bottom plate, which is convenient for the arrangement of the first bolt and avoids interference between the first bolt and the support platform. The upper end surface of the base plate can also be designed. Specifically, the upper end surface of the base plate 100 includes supporting end surfaces 110 at both ends and a fixed end surface 111 in the middle. The fixed end surface 111 is a sunken groove structure, that is, the supporting end surface and the fixed end surface are arranged in a step shape.

[0064] The above structure can also be provided with an upper pressure plate on the top of the first limit baffle and the second limit baffle, so that the support platform is assembled in a pull-out structure, and the first limit baffle and the second limit baffle can also be provided with a second bolt to improve the stability of the structure.

[0065] Alternatively, the second screw hole may not be provided in the above structure, and the second bolt can be directly supported on the end face of the support platform. In order to prevent the support platform from separating from the base plate, an upper pressure plate is provided on the first limit baffle and the second limit baffle to achieve top limiting.

[0066] Form 2: This specific structure is roughly the same as the structure of Form 1, except that this structure does not include an upper pressure plate, and a plurality of second bolts 106 are provided on the support platform 200. A third screw hole corresponding to each second bolt 106 is provided on the base plate 100, and the connection between the base plate and the support platform is achieved through a plurality of second bolts. Since this structure requires a plurality of second bolts for operation, it is easy to cause cumbersome operation steps and relatively poor practicality.

[0067] Form three: This embodiment is basically the same as Form one, except that the structure does not include an upper pressure plate. Form two uses a method of directly connecting the base plate and the support platform for fixation. In this application, a second bolt 106 is provided on both the first limit baffle 104 and the second limit baffle 105, and a fourth screw hole corresponding to the second bolt 106 is provided on the end face of the support platform 200, thereby realizing the connection between the support platform and the first limit baffle and the second limit baffle.

[0068] Since the first limit baffle and the second limit baffle are limited in two directions, but the support platform can slide freely in the other two directions during the installation process without position constraints, the bottom plate 100 of the present application is also provided with an anti-slip block 107, and the anti-slip block 107 forms a positioning groove surrounded by the first limit baffle 104 and the second limit baffle 105 on three sides. In this way, the support platform can be quickly positioned and then fastened.

[0069] The sliding locking unit in this embodiment includes a slide groove 201, a slider 301 and a third bolt 302. The slide groove 201 is opened on the support platform 200, and the groove body width of the slide groove 201 is larger than the slot width of the slide groove 201; the slider 301 is arranged on the workbench 300, and the slider 301 is matched and slidably arranged in the slide groove 201; the third bolt 302 is used to fix the workbench 300 and the support platform 200.

[0070] The slide groove 201 in this embodiment can directly adopt a dovetail groove, so that the slider will not be separated from the slide groove, and it is also convenient to fasten the workbench and the support platform. It only needs to set a third bolt on the workbench to tighten the bottom surface of the slide groove or the upper end surface of the support platform.

[0071] In addition, the slide groove 201 of the present application can also adopt a rectangular groove. In order to prevent the sliding block from detaching from the rectangular groove, an anti-slip groove 202 is arranged on the side of the slide groove 201, and an anti-slip side slide plate 303 corresponding to the anti-slip groove 202 is arranged on the sliding block 301. The purpose that can be achieved is basically the same as that of the dovetail groove.

[0072] Furthermore, the clamping unit 400 of the present application includes a fixed clamping block 401, a fixed table 402 and a clamping screw 403, the fixed clamping block 401 is arranged at the first end of the workbench 300, the fixed table 402 is arranged at the second end of the workbench 300, the clamping screw 403 is connected to the fixed table 402 by a thread, and the end of the clamping screw 403 is provided with a movable clamping block 404 corresponding to the fixed clamping block 401.

[0073] Other clamping structures may also be used, and other clamping structures need to ensure that the steel fiber tensioning clamping fixture will not interfere with the clamping structure during disassembly, because during subsequent disassembly, the steel fiber tensioning clamping fixture is assembled with test devices such as load sensors.

[0074] The present application also discloses a steel fiber tensioning test method, which uses the steel fiber tensioning clamping fixture as described above to test the centering and spacing fixing device, specifically comprising the following steps:

[0075] Assemble the workbench 300 with the support table 200, and fix the support table on the base platform through a fixing unit. Specifically, first fix the base plate 100 on the base platform, assemble the workbench 300 with the support table 200, and then align the support table 200 with the base plate 100 to avoid the workbench 300 being unable to be assembled after the support table 200 and the base plate 100 are assembled;

[0076] After the support 200 and the base plate 100 are fixed, the clamping unit 400 is installed on the workbench 300, and the steel fiber tensioning clamp 510 is fixed on the workbench, and the distance between the two workbenches is adjusted. After confirming that the length of the steel fiber 520 meets the test requirements, the workbench and the support table are fixed;

[0077] The steel fiber tensioning clamp 510 is driven to anchor the steel fiber specimen and complete the clamping of the steel fiber specimen. No unnecessary swinging and twisting are required in the whole process, so the integrity of the steel fiber specimen is fully guaranteed.

[0078] Loosen the fixing unit and remove the support platform from the base platform. At this time, the support platform, the workbench and the steel fiber tensioning clamping fixture are an integral structure, and the entire structure is rotated, and then the tensioning rod 540 of the steel fiber tensioning clamping fixture is connected to the load sensor 530 to complete the connection between the steel fiber tensioning clamping fixture and the test equipment;

[0079] After the belt connection is debugged in place, the clamping unit 400 is released, the clamping unit 400 and the steel fiber tensioning clamp 510 are separated, and the support table 200 and the workbench 300 are removed;

[0080] Perform a tension test, read the data of the load sensor 530 and record it.

[0081] During the entire process mentioned above, the steel fibers are effectively aligned, positioned and clamped to prevent the steel fiber tensioning clamp from repeatedly pulling, pressing and twisting the steel fibers, thereby avoiding fatigue stress on the steel fiber specimens during the installation phase and keeping the steel fibers on the same horizontal line at all times to prevent bending and torsional stresses.

[0082] The preferred embodiments for implementing the present invention have been described in detail above, but it should be understood that the role of these embodiments is only to exemplify, and is not intended to limit the scope, applicability or configuration of the present invention in any way. The protection scope of the present invention is defined by the attached claims and their equivalents. A person of ordinary skill in the art can make many changes to the above embodiments under the guidance of the present invention, and these changes all fall within the protection scope of the present invention.

Claims

1. A fixing device for centering and adjusting the distance of a steel fiber tensioning clamp, characterized in that: include: Support table; A fixing unit, the fixing unit is used to fix the support platform on the base platform; A workbench, wherein the two workbench are arranged on the support platform opposite to each other, and a sliding locking unit is arranged on the support platform, and the sliding locking unit is used to adjust the distance between the two workbench and fix the workbench and the support platform; and A clamping unit, each of the workbenches is provided with a clamping unit correspondingly, and the clamping unit is used to fix the steel fiber tensioning clamping fixture; The fixing unit comprises: a bottom plate; A connecting block, a plurality of connecting blocks are fixed on the basic platform, a first screw hole is provided on the connecting block, and the bottom plate is matched and supported on the connecting block; a first bolt, a plurality of the first bolts are arranged on the bottom plate, and the first bolts are connected to the first screw holes correspondingly; and a limit locking unit, the support platform is supported and arranged on the bottom plate, the limit locking unit is arranged between the support platform and the bottom plate, and the limit locking unit is used to constrain the position of the support platform on the bottom plate and fix the support platform and the bottom plate; The limit locking unit comprises: A first limiting baffle, which is arranged on one side of the bottom plate; A second limit baffle is arranged on the other side of the bottom plate, and the first limit baffle and the second limit baffle are arranged opposite to each other; and A second bolt, the second bolt is used to fix the support platform and the bottom plate; Among the first limit baffle and the second limit baffle, one of them is provided with a second bolt, the second bolt is connected to the top support of the end surface of the support platform, or is connected to the second screw hole provided on the end surface of the support platform, and the upper part of the other is provided with an upper pressing plate which is in contact with the upper end surface of the support platform; Or the support platform is provided with a plurality of second bolts, and the bottom plate is provided with third screw holes corresponding to the second bolts; Or the first limit baffle and the second limit baffle are both provided with a second bolt, and the end surface of the support platform is provided with a fourth screw hole corresponding to the second bolt; The sliding locking unit comprises: A chute, the chute is arranged on the support platform, and the width of the chute body is greater than the width of the chute opening; A slider, the slider is arranged on the workbench, and the slider is matched and slidably arranged in the slide groove; and A third bolt, the third bolt is used to fix the workbench and the support platform; The clamping unit includes a fixed clamping block, a fixed platform and a clamping screw. The fixed clamping block is arranged at the first end of the workbench, the fixed platform is arranged at the second end of the workbench, the clamping screw is connected to the fixed platform by a thread, and a movable clamping block corresponding to the fixed clamping block is arranged at the end of the clamping screw.

2. The fixing device for centering and adjusting the distance of the steel fiber tensioning clamp according to claim 1 is characterized in that: The bottom plate is also provided with an anti-slip block, and the anti-slip block, the first limit baffle plate and the second limit baffle plate form a positioning groove surrounded on three sides.

3. The fixing device for centering and adjusting the distance of the steel fiber tensioning clamp according to claim 1 is characterized in that: The upper end surface of the bottom plate includes supporting end surfaces at both ends and a fixed end surface at the middle, and the fixed end surface is a sink-type structure.

4. The fixing device for centering and adjusting the distance of the steel fiber tensioning clamp according to claim 1 is characterized in that: The slide groove is a dovetail groove; Or the slide groove is a rectangular groove, an anti-slip groove is arranged on the side of the slide groove, and the sliding block is provided with an anti-slip side sliding plate corresponding to the anti-slip groove.

5. A steel fiber tension test method, characterized in that: The method of testing the centering and spacing fixing device using the steel fiber tensioning clamp as described in any one of claims 1 to 4 specifically comprises the following steps: Assemble the workbench and the support platform, and fix the support platform on the basic platform through the fixing unit; Install the clamping unit on the workbench, fix the steel fiber tensioning clamp on the workbench, adjust the workbench, determine the length of the steel fiber, and then fix the workbench to the support table; Drive the steel fiber tensioning clamp to anchor the steel fiber specimen; Loosen the fixing unit, remove the support platform from the base platform, and connect the tension rod of the steel fiber tensioning clamp to the load sensor; Release the clamping unit, separate the clamping unit and the steel fiber tensioning clamp, and take away the support table and the workbench; Conduct tension test, read load sensor data and record.

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