Tension-shear coupled mechanical property test tool and equipment

Abstract

The utility model relates to the technical field of wind power equipment, and provides a tension-shear coupled mechanical property test tool and equipment, the test tool comprises a support frame and a loading mechanism, the support frame is used for abutting against a test block; the loading mechanism is arranged on the support frame, is connected to the connecting part of the test block, and is used for applying a tensile force to the test block, and an included angle is formed between the tensile force and the plane where the test block is located. According to the tension-shear coupled mechanical property test tool provided by the embodiment of the utility model, the support frame is propped against the test block, the tension forming an included angle with the plane where the test block is located is applied to the test block through the loading mechanism, and the tension is resultant force of shear force and tensile force; therefore, the mechanical property test of the upper connecting part of the test block is carried out under the coupling action of shearing force and tensile force.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power equipment, in particular to a tensile-shear coupled mechanical performance test tool and equipment. Background Art

[0002] With the further development and utilization of wind resources, wind turbines are gradually developing towards high power and high altitude. Traditional wind power flexible all-steel tower technology is difficult to meet the demand for high rigidity and large diameter wind turbine towers. In recent years, with the promotion of prefabricated concrete technology, the application of concrete towers in the field of wind power generation has become increasingly common, effectively making up for the shortcomings of low rigidity and small diameter of flexible steel towers. At present, the concrete tower is divided into multiple sections in the height direction of the tower. Each section is composed of multiple concrete tower segments spliced ​​together to form a complete ring structure. Multiple sections are assembled on site by hoisting. The concrete tower segments have hanging nails for hoisting. The quality of the hanging nails is directly related to the safety performance of the concrete tower segment hoisting process. Therefore, the bearing capacity test of the hanging nails on the concrete tower segments is particularly important.

[0003] Because the concrete tower segments are hoisted in a full ring, the nails are subject to the coupled effects of tension and shear. Current tension-shear coupling tests are limited to mechanical laboratories, and there are no convenient testing conditions at the concrete tower segment construction site, making it impossible to conduct mechanical property tests on the nails. Utility Model Content

[0004] The utility model provides a tension-shear coupling mechanical property test tool and equipment, which are used to solve the defect that the mechanical property test of the hanging nail cannot be carried out in the prior art.

[0005] The utility model provides a tensile-shear coupled mechanical property test tool, comprising a support frame and a loading mechanism, the support frame comprising a crossbeam and a support member, the support frame being used to abut against a test block, the loading mechanism being arranged on the support frame, the loading mechanism being connected to a connecting portion of the test block, and the loading mechanism being used to apply a tensile force to the test block at an angle to the plane where the test block is located.

[0006] According to a tensile-shear coupled mechanical property test fixture provided by the present invention, the support frame includes a crossbeam and a support member, the upper end of the support member is connected to the crossbeam, and the lower end of the support member has an abutment portion, which is used to abut against the upper part of the test block.

[0007] According to the tension-shear coupling mechanical property test tool provided by the utility model, the support member includes two legs arranged at both ends of the beam, and the plane where the legs are located is parallel to the direction of the tension.

[0008] According to the tension-shear coupling mechanical property test tool provided by the utility model, the plane where the legs are located and the plane where the test block is located have a preset angle, and the preset angle is 25° to 35°.

[0009] According to the tensile-shear coupled mechanical property testing tool provided by the utility model, the abutting portion is a clamping groove provided at the lower end of the supporting leg.

[0010] According to a tensile-shear coupled mechanical property test fixture provided by the utility model, the abutment portion includes a first abutment plane and a second abutment plane connected to each other, the first abutment plane is used to abut the upper plane of the test block, and the second abutment plane is used to abut the side plane of the test block.

[0011] According to a tensile-shear coupled mechanical property test tool provided by the utility model, the middle part of the beam has an installation through hole, the loading mechanism includes a loading member and a connecting rope, the connecting rope is passed through the installation through hole, the first end of the connecting rope is used to be connected to the connecting part, and the loading member is connected to the second end of the connecting rope.

[0012] According to the tensile-shear coupled mechanical property testing tool provided by the utility model, the loading part includes a puller, the connecting rope includes a steel wire rope, and the diameter of the steel wire rope is 5 to 25 mm.

[0013] The utility model also provides a tensile-shear coupled mechanical performance test device, comprising: a test block and any one of the tensile-shear coupled mechanical performance test fixtures described above.

[0014] According to a tension-shear coupled mechanical property testing device provided by the utility model, the test block includes a steel skeleton and a concrete structure, and the steel skeleton and the concrete structure are cast and fixedly connected, and the steel skeleton has a connecting portion.

[0015] The tensile-shear coupled mechanical performance test fixture provided by the embodiment of the present invention is abutted against the test block by a support frame, and a tensile force is applied to the test block at an angle to the plane where the test block is located through a loading mechanism. The tensile force is the resultant force of the shear force and the tensile force, so that the mechanical performance test of the connection part on the test block is carried out under the coupling action of the shear force and the tensile force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is one of the structural schematic diagrams of the coordination between the tension-shear coupling mechanical property test fixture and the test block provided by the utility model.

[0018] Figure 2 This is the second structural schematic diagram of the cooperation between the tension-shear coupling mechanical property test fixture and the test block provided by the utility model.

[0019] Figure 3 It is a schematic diagram of the tension direction of the tension-shear coupling mechanical property test tool provided by the utility model.

[0020] Figure 4 It is a loading schematic diagram of the tension-shear coupling mechanical property test tool provided by the utility model.

[0021] Figure 5 This is one of the structural diagrams of the test block provided by the utility model.

[0022] Figure 6 This is the second structural diagram of the test block provided by the utility model.

[0023] Reference numerals: 100, support frame; 110, crossbeam; 120, support member; 121, support leg; 122, abutment portion; 200, loading mechanism; 210, loading member; 220, connecting rope; 300, test block; 310, connecting portion. DETAILED DESCRIPTION

[0024] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0026] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0027] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally 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 diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0029] The following combination Figures 1-6 The invention describes a tensile-shear coupled mechanical property test tool according to an embodiment of the present invention.

[0030] The embodiment of the first aspect of the present invention provides a tensile-shear coupled mechanical property test tool, such as Figures 1 to 4 As shown, the tension-shear coupling mechanical property test fixture includes a support frame 100 and a loading mechanism 200 . The support frame 100 is used to abut against the test block 300 , and the loading mechanism 200 is used to apply tension to the test block 300 .

[0031] The loading mechanism 200 is disposed on the support frame 100 and connected to the connection portion 310 of the test block 300 . The loading mechanism 200 is used to apply a pulling force to the test block 300 that forms an angle with the plane where the test block 300 is located.

[0032] It can be understood that according to the reinforcement form of the mixed tower pipe segment, the corresponding test block 300 is equivalently configured, and the upper part of the test block 300 has a connection part 310 for lifting. By placing the support frame 100 against the test block 300, the loading mechanism 200 is connected to the connection part 310 on the test block 300, and the loading mechanism 200 is used to apply an inclined tensile force to the connection part 310 of the test block 300, the bearing capacity of the connection part 310 is tested.

[0033] It should be noted that the mixed tower segments are subjected to the coupling effects of tensile force and shear force at the same time during the hoisting process. The loading mechanism 200 of the utility model applies a tensile force inclined relative to the test block 300 to the test block 300. The tensile force F is the resultant force of the horizontal shear force F1 and the vertical tensile force F2. When the loading mechanism 200 applies a tensile force to the test block 300, it is equivalent to applying a horizontal shear force and a vertical tensile force to the test block 300 at the same time, thereby conducting a mechanical property test of the connection part 310 on the test block 300 under the coupling effect of shear force and tensile force.

[0034] The tensile-shear coupled mechanical performance test fixture provided by the embodiment of the present invention is configured such that the support frame 100 is pressed against the test block 300, and a tensile force is applied to the test block 300 at an angle to the plane where the test block is located through the loading mechanism 200. The tensile force is the resultant force of the shear force and the tensile force, thereby performing a mechanical performance test on the connecting portion 310 on the test block 300 under the coupled action of the shear force and the tensile force.

[0035] In one embodiment of the present invention, the support frame 100 includes a beam 110 and a support member 120, the upper end of the support member 120 is connected to the beam 110, and the lower end of the support member 120 has an abutment portion 122, which is used to abut against the upper part of the test block 300; the loading mechanism 200 is arranged on the beam 110 and connected to the connecting portion 310 of the test block 300, and the loading mechanism 200 is used to apply an inclined upward pulling force to the test block 300.

[0036] Specifically, such as Figure 4 As shown, the support member 120 includes two legs 121 provided at both ends of the beam 110 , and the plane where the legs 121 are located is parallel to the direction of tension.

[0037] It can be understood that legs 121 are provided at both ends of the beam 110, and the lower ends of the legs 121 have abutment portions 122. When the abutment portions 122 of the legs 121 abut against the test block 300, the legs 121 are arranged tilted so that the plane where the legs 121 are located is parallel to the direction of tension.

[0038] Optional, such as Figure 3As shown, when the abutting portion 122 of the leg 121 abuts against the test block 300, the leg 121 is tilted so that a preset angle α is formed between the length direction of the leg 121 and the vertical direction. The preset angle α is 25° to 35°. In this embodiment, the preset angle is 30°.

[0039] Further, such as Figure 4 As shown, the abutment portion 122 is a snap-fit ​​groove provided at the lower end of the leg 121. It is understood that the snap-fit ​​groove is provided at the lower end of the leg 121. When the leg 121 is placed on the test block 300, the snap-fit ​​groove positions the leg 121 at an angle relative to the test block 300.

[0040] Specifically, the abutting portion 122 includes a first abutting plane and a second abutting plane connected to each other. The first abutting plane is used to abut against the upper plane of the test block 300 , and the second abutting plane is used to abut against the side plane of the test block 300 .

[0041] It can be understood that a snap-in groove is provided on the lower end surface of the support leg 121, and the snap-in groove has two connected groove walls to form a first abutment plane and a second abutment plane. The first abutment plane and the second abutment plane respectively abut against two adjacent planes of the test block 300, wherein the two adjacent planes of the test block 300 are an upper plane and a side plane respectively.

[0042] In another embodiment of the present invention, a mounting through hole is provided in the middle portion of the beam 110, and the loading mechanism 200 includes a loading member 210 and a connecting rope 220, the connecting rope 220 is passed through the mounting through hole, and the first end of the connecting rope 220 is used to connect to the connecting portion 310 of the test block 300, and the loading member 210 is arranged on the beam 110 and connected to the second end of the connecting rope 220.

[0043] Optionally, the loading member 210 is a puller, which is used to provide the required tensile force for the test block 300. For example, the puller can be a common handheld puller. Furthermore, the connecting rope 220 can be a steel wire rope with a diameter of 5 to 25 mm, with its ends respectively connected to the loading member 210 and the connecting portion 310 of the test block 300.

[0044] In a specific embodiment of the present invention, Figures 1 to 4 As shown, the shear coupling mechanical property test fixture includes a support frame 100 and a loading mechanism 200.

[0045] The support frame 100 includes a beam 110 and a support member 120 . The support member 120 includes two legs 121 arranged in parallel. The two legs 121 are arranged at both ends of the beam 110 .

[0046] The crossbeam 110 is a 5mm thick steel pipe or other beam-type component. The crossbeam 110 is welded with the support legs 121 to form a reliable mechanical system and form a fulcrum for the loading mechanism 200. The middle of the crossbeam 110 has an installation through hole for passing the wire rope.

[0047] The leg 121 is a 5mm thick square steel tube or other supporting member. A notch is provided at the bottom of the leg 121 to match the test block 300, forming a snap-in slot. The snap-in slot has a first abutting surface and a second abutting surface connected to each other. When the leg 121 is placed on the test block 300, the first abutting surface abuts the upper surface of the test block 300, and the second abutting surface abuts the side surface of the test block 300. The leg 121 is tilted, so that the leg 121 and the test block 300 form a preset angle α. It should be noted that when the leg 121 is tilted, a preset angle α is formed between the length direction of the leg 121 and the vertical direction, so that the leg 121 and the test block 300 (the vertical plane of the test block 300) form a preset angle α. For example, the leg 121 is placed at a 30° angle to the test block 300 to facilitate tension-shear coupling.

[0048] The loading mechanism 200 includes a loading member 210 and a connecting rope 220. The loading member 210 is arranged on the side of the beam 110 away from the support leg 121. The loading member 210 uses a handheld pulling instrument to provide the required tension for the test; the connecting rope 220 uses a steel wire rope composed of high-strength stress steel wire with a diameter of 8 to 20 mm. One end of the steel wire rope is connected to the loading member 210, and the other end of the steel wire rope is used to connect to the connecting part 310 of the test block 300.

[0049] It should be noted that the mechanical properties test tooling of this embodiment can provide shear force and tensile force at the same time, which is more in line with actual working conditions and improves the accuracy of the test; the mechanical properties test tooling of this embodiment has no requirements for the test site, does not require the use of complex instruments or tooling used in mechanical laboratories, and is easy to operate.

[0050] The fabrication process for the shear-coupled mechanical properties test fixture of this embodiment involves machining the legs 121 according to the designed cutouts, ensuring they can stand on the test block 300 and that the angle between them meets the design requirements. A crossbeam 110 is welded to the two legs 121 to form a gantry structure. A steel wire rope is installed on the crossbeam 110 and securely connected to the loading member 210.

[0051] The embodiment of the second aspect of the present invention provides a tensile-shear coupled mechanical performance testing device, such as Figures 1 to 3 As shown, the test equipment includes a test block 300 and the tension-shear coupling mechanical property test fixture provided by any of the above embodiments.

[0052] In one embodiment of the present invention, Figure 5 and Figure 6 As shown, the test block 300 is a reinforced concrete test block corresponding to the concrete tower segment. The test block 300 includes a steel skeleton and a concrete structure. The steel skeleton and the concrete structure are cast and fixedly connected. The steel skeleton has a connecting portion 310.

[0053] It can be understood that the test block 300 is equivalently configured with steel bars and poured with concrete according to the reinforcement form of the mixed tower pipe segment to form a reinforced concrete test block, and the corresponding connection part 310 is pre-set on the reinforced concrete test block according to the form of hanging nails on the mixed tower pipe segment.

[0054] Optionally, the connection portion 310 may be an ordinary round-head hanging nail, which is pre-embedded in the reinforced concrete test block in advance, and the diameter and length are determined based on experience or calculation.

[0055] Furthermore, the shape of the test block 300 may be a cube. For example, the size of the test block 300 is 0.24mx1.5mx1.5m, which may be slightly modified according to the form of the hanging nails and the requirements of the reinforcement.

[0056] In another embodiment of the present invention, the manufacturing process of the test block 300 is as follows: first, the steel bars are configured equivalently according to the reinforcement form of the concrete tower segments, and the steel bars of the reinforced concrete test block are tied and the connection part 310 is buried according to the reinforcement diagram provided by the test; then, the concrete is poured and cured for a preset number of days, for example, 28 days, to complete the manufacturing of the reinforced concrete test block.

[0057] The working principle of the tension-shear coupling mechanical property testing equipment of the present invention is as follows: the test block 300 is placed vertically, and the connecting part 310 on the test block is at the upper end, the support leg 121 is placed obliquely on the test block 300, and there is a preset angle α between the length direction of the support leg 121 and the vertical direction, and the wire rope is connected to the connecting part 310 of the test block 300, and the required inclined upward pulling force is applied to the test block 300 through the loading part 210 to perform a mechanical property test of the connecting part 310 on the test block 300 under the coupling action of shear force and tensile force.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A tensile-shear coupled mechanical properties test fixture, characterized in that: include: A support frame, the support frame being used to abut against the test block; a loading mechanism, disposed on the support frame, connected to a connecting portion of the test block, and configured to apply a pulling force to the test block at an angle to a plane where the test block is located; In which, the lower end of the support frame has an abutment portion, which is used to abut against the upper part of the test block. The abutment portion is a clamping groove arranged at the lower end of the support frame, and the clamping groove includes a first abutment plane and a second abutment plane connected to each other. The first abutment plane is used to abut against the upper plane of the test block, and the second abutment plane is used to abut against the side plane of the test block.

2. The tension-shear coupling mechanical property test fixture according to claim 1, characterized in that: The support frame includes a crossbeam and a support member, the upper end of the support member is connected to the crossbeam, and the lower end of the support member has the abutment portion.

3. The tension-shear coupling mechanical property test fixture according to claim 2, characterized in that: The support member includes two supporting legs arranged at both ends of the beam, and the plane where the supporting legs are located is parallel to the pulling direction.

4. The tension-shear coupling mechanical property test fixture according to claim 3, characterized in that: A preset angle is formed between the plane where the legs are located and the plane where the test block is located, and the preset angle is 25° to 35°.

5. The tension-shear coupling mechanical property test fixture according to any one of claims 2 to 4, characterized in that: The middle part of the crossbeam has an installation through hole, and the loading mechanism includes a loading member and a connecting rope. The connecting rope is passed through the installation through hole, the first end of the connecting rope is used to be connected to the connecting part, and the loading member is connected to the second end of the connecting rope.

6. The tension-shear coupling mechanical property test fixture according to claim 5, characterized in that: The loading component includes a puller, the connecting rope includes a steel wire rope, and the diameter of the steel wire rope is 5 to 25 mm.

7. A tensile-shear coupled mechanical properties testing device, characterized in that: The invention comprises a test block and a tension-shear coupling mechanical property test fixture as claimed in any one of claims 1 to 6.

8. The tension-shear coupling mechanical property testing equipment according to claim 7, characterized in that: The test block includes a steel frame and a concrete structure, and the steel frame and the concrete structure are cast and fixedly connected, and the steel frame has a connecting portion.

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