Bolt tensile strength detection equipment

Abstract

The invention relates to bolt tensile strength detection equipment in the field of bolt detection equipment, and the bolt tensile strength detection equipment comprises a tension base block and a tension wedge block which are matched with each other in shape. The tension base block and the tension wedge block can be separated, and the broken residual part of the to-be-detected bolt is taken out along the direction of the mounting groove, so that in a tensile experiment, the broken bolt is not easy to be clamped in the clamp, the disassembly is convenient, and the detection efficiency of the bolt is not easy to influence; and by virtue of the structural design of a locking ring, a power column, a piston II and an observation lens in the auxiliary cavity, the tension base block and the tension wedge block can be quickly combined and separated according to the working state, so that a worker can conveniently disassemble and replace the tension base block and the tension wedge block, and the detection efficiency is further improved.

Description

Technical Field

[0001] The bolt detection device involved in the present invention, in particular, relates to a bolt tensile strength detection device applied to the field of bolt detection devices. Background Art

[0002] Bolt tensile strength detection refers to determining the maximum load-bearing capacity of a bolt under axial tension through a tensile test. The bolt tensile strength detection ensures the safety of structures and equipment, and at the same time ensures that the product quality and performance meet the standards. Bolt tensile strength detection is the core link of the quality control of connectors. Its significance lies not only in avoiding catastrophic accidents, but also throughout the entire product life cycle - from design selection, production and manufacturing to actual application, ultimately ensuring project safety, reducing comprehensive costs and enhancing market competitiveness.

[0003] The specification of invention patent CN202210647202.X discloses a large-size bolt tensile tester, which includes a force application control mechanism and an adjustment mechanism. The force application control mechanism and the adjustment mechanism are connected through a load-bearing frame. A fixture guide rail is arranged on the top surface of the load-bearing frame; a first fixture assembly is arranged at the output end of the force application control mechanism; a second fixture assembly is arranged at the output end of the adjustment mechanism; guide wheel groups are arranged on both sides of the first fixture assembly and the second fixture assembly, and the guide wheel groups cooperate with the fixture guide rail; the detection device of this application adopts a horizontal structure, and a horizontally placed actuator applies force for a loading test, which is more stable than the traditional up-and-down structure detector, and the stability during the working process is also stronger. The test loading method and loading speed are controlled by electro-hydraulic servo technology. The structure is simple and occupies little space, and it can meet the requirements of pressure and tension during the detection of large-size long bolts.

[0004] The specification of invention patent CN202321823698.8 discloses a bolt tensile fixture, which includes an upper fixture assembly and a lower fixture assembly. The upper fixture assembly and the lower fixture assembly are symmetrically arranged up and down on the left side of the detection device. A threaded joint is arranged inside the lower fixture assembly, and a bolt specimen is screwed onto the threaded joint. When the present invention is used, the fixture extension on the upper side is lapped on the nut head of the bolt specimen, and the fixture extension on the lower side will directly contact the lower core. The sensor clamp is used to keep the clamping normal. When the bolt specimen deforms, the fixture extension slides directionally on the slide rod with a return spring, and the impact plate always presses the LVDT. The LVDT is connected to the controller extensometer channel to collect data. As the specimen is stretched and deformed, the LVDT follows to measure the deformation of the specimen, realizing the automatic test of the elongation rate of the bolt specimen, and further being able to perform tensile resistance tests on different bolt specimens, and using the tensile amount as an intuitive comparison parameter.

[0005] In the prior art, before the tensile test of a bolt, the bolt is usually fixed by a fixture and then placed in a corresponding tensile device for the tensile test. However, in the actual bolt testing process, the tensile test is usually a destructive test, and irregular deformation is likely to occur at the fracture of the bolt during the test. This results in the fractured bolt being easily stuck in the fixture after the test, making disassembly rather troublesome and affecting the testing efficiency of the bolt. Summary of the Invention

[0006] In view of the above prior art, the technical problem to be solved by the present invention is that during the actual bolt testing process, irregular deformation is likely to occur, which results in the fractured bolt being easily stuck in the fixture after the test, making disassembly rather troublesome and affecting the testing efficiency of the bolt.

[0007] To solve the above problems, the present invention provides a bolt tensile strength testing device, which includes a pair of clamping bodies with matching positions. At one end of each of the two clamping bodies close to each other, a placement groove is formed. In each of the two placement grooves, a tensile base block is placed. Each of the two tensile base blocks includes a base block body. At one end of each of the two base block bodies away from each other, a wedge-shaped groove is formed. A through hole is formed in the bottom plate of the wedge-shaped groove and penetrates through the base block body. A tensile wedge block matching with the wedge-shaped groove is placed in the wedge-shaped groove.

[0008] The tensile wedge block includes a wedge block body. A connection hole matching with the position of the through hole is formed in the wedge block body and penetrates through the wedge block body. An installation groove is formed in the wedge block body and communicates the connection hole with the outside. At one end of the wedge block body away from the tensile base block, a fixing groove matching with the connection hole is formed. A bolt to be tested is arranged between the two clamping bodies. The two ends of the bolt to be tested respectively penetrate through the two groups of tensile base blocks and tensile wedge blocks. The bolt head of the bolt to be tested is placed in the fixing groove of the lower tensile wedge block. A fixing nut is threadedly connected to the side of the bolt to be tested away from the bolt head, and the fixing nut is located in the fixing groove of the upper tensile wedge block.

[0009] In the above bolt tensile strength testing device, during the tensile test, the fractured bolt is not easily stuck in the fixture, the disassembly is convenient, and it is not easy to affect the testing efficiency of the bolt.

[0010] As a further improvement of the present application, both the fixed nut and the tensile base block are made of magnetic materials. One end of the wedge block body close to the bottom plate of the wedge-shaped groove is fixedly connected with an electromagnetic ring, and the electromagnetic ring is embedded in the wedge block body. A plurality of auxiliary cavities are drilled on the bottom plate of the wedge-shaped groove, and the auxiliary cavities penetrate through the base block body. A locking ring matching with itself is threadedly connected at the opening of the auxiliary cavity close to the tensile wedge block. A power column is inserted into the locking ring. The power column includes a column body inserted on the locking ring. A first piston matching with the size of the auxiliary cavity is sleeved on the outer wall of the column body. A second piston is slidably connected in the auxiliary cavity, and the second piston is located on the side of the power column away from the locking ring. A viewing lens matching with itself is fixedly connected at the opening of the auxiliary cavity on the side away from the locking ring. The first piston and the second piston divide the auxiliary cavity into three parts, namely an activity chamber, a transition chamber, and an energy storage chamber in sequence from the locking ring to the viewing lens. Air is filled in both the activity chamber and the energy storage chamber, and hydraulic oil is filled in the transition chamber. The power column floats in the hydraulic oil. After the tensile test is completed, the tensile base block and the tensile wedge block are separated, which is convenient for the staff to carry out disassembly and replacement work, and further improves the detection efficiency.

[0011] As a further improvement of the present application, the locking ring includes a ring body, and a plurality of notch grooves are drilled on the side wall of the ring body. On the one hand, the notch grooves keep the activity chamber communicating with the outside air, which is convenient for the movement of the power column. On the other hand, it is also convenient for the disassembly of the locking ring, which is convenient for the replacement of the power column and the hydraulic oil.

[0012] As a further improvement of the present application, the viewing lens is a convex lens, and the second piston and the first piston are made of transparent materials, which is convenient for the maintenance personnel to observe whether there are flocculent impurities in the hydraulic oil, and is convenient for judging whether the hydraulic oil has deteriorated and needs to be replaced.

[0013] As another improvement of the present application, an annular lamp is fixedly connected to the lower end of the ring body, and the light generated by the annular lamp is used to increase the observation effect of the floccules in the hydraulic oil, which is convenient for the technical personnel to discover in time.

[0014] As a supplementary improvement of the present application, a bearing ring is rotatably connected to the side wall of the column body, and an attachment ring is rotatably connected to the outside of the bearing ring. A plurality of blades are fixedly connected to the attachment ring, which increases the damping of the power column under the action of the hydraulic oil during the movement process, making the movement of the power column more stable.

[0015] As a supplementary improvement of the present application, a plurality of through holes are drilled on each of the plurality of blades. On the one hand, it further increases the damping generated when the power column moves. On the other hand, it makes the blades stir the hydraulic oil during the rotation process, which is convenient for the maintenance personnel to observe the flocculent impurities in the hydraulic oil.

[0016] As yet another improvement of the present application, a compression spring is connected between the second piston and the viewing lens. The two ends of the compression spring are fixedly connected to the second piston and the viewing lens respectively, increasing the energy storage limit in the energy storage chamber and facilitating the subsequent separation of the tension base block and the tension wedge block.

[0017] In summary, in the present application, when a large deformation occurs at the fracture during the tensile test of the bolt to be detected and the remaining part of the bolt to be detected cannot be directly taken out through the connection hole, the tension base block and the tension wedge block can be separated, and the remaining part of the fractured bolt to be detected can be taken out along the direction of the installation groove, making it difficult for the fractured bolt to get stuck in the fixture, facilitating disassembly and not easily affecting the detection efficiency of the bolt.

[0018] At the same time, through the excavation of the auxiliary chamber and the structural design of each component such as the locking ring, power column, second piston and viewing lens in the auxiliary chamber, the tension base block and the tension wedge block can be quickly combined and separated according to the working state, facilitating the disassembly and replacement work for the staff and further increasing the detection efficiency.

[0019] Finally, the refinement of the structure of the power column realizes that on the one hand, it increases the damping generated when the power column moves, making the movement of the power column more stable, and on the other hand, it enables the blades to stir the hydraulic oil during rotation, facilitating the maintenance personnel to observe the flocculent debris in the hydraulic oil and facilitating the judgment of whether the hydraulic oil has deteriorated and needs to be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Partial structural schematic diagram of the bolt tensile strength testing device according to the first embodiment of the present application;

[0021] Figure 2 Structural schematic diagram of the tension unit according to the first embodiment of the present application;

[0022] Figure 3 Structural schematic diagram of the tension base block according to the first embodiment of the present application;

[0023] Figure 4 Structural schematic diagram of the tension wedge block according to the second embodiment of the present application;

[0024] Figure 5 Structural schematic diagram of the tension base block according to the second embodiment of the present application;

[0025] Figure 6 Partial structural schematic diagram of the auxiliary chamber of the tension base block according to the second embodiment of the present application;

[0026] Figure 7 For Figure 6 Structural schematic diagram at position A in

[0027] Figure 8Schematic diagram of the locking ring according to the second embodiment of the present application;

[0028] Figure 9 Schematic diagram of the power column according to the second embodiment of the present application;

[0029] Figure 10 Schematic diagram of partial structural changes of the auxiliary cavity according to the second embodiment of the present application.

[0030] Description of reference numerals in the figure:

[0031] 1 fixture body, 2 placement groove, 3 bolt to be detected, 4 fixing nut, 5 tension base block, 501 base block main body, 502 wedge-shaped groove, 503 through hole, 504 auxiliary cavity, 505 activity chamber, 506 transition chamber, 507 energy storage chamber, 6 tension wedge block, 601 wedge block main body, 602 installation groove, 603 connection hole, 604 fixing groove, 605 electromagnetic ring, 7 locking ring, 701 ring body, 702 notch groove, 703 annular lamp, 8 power column, 801 column body, 802 piston I, 803 bearing ring, 804 attachment ring, 805 blade, 806 through hole, 9 piston II, 10 observation lens, 11 compression spring. Specific embodiments

[0032] The following describes the two embodiments of the present application in detail with reference to the accompanying drawings.

[0033] The first embodiment:

[0034] Figures 1-3 There is shown a bolt tensile strength testing device, including a pair of fixture bodies 1 that are positionally matched with each other. Placement grooves 2 are respectively formed at one ends of the two fixture bodies 1 that are close to each other. Tension base blocks 5 are placed in the two placement grooves 2. The two tension base blocks 5 each include a base block main body 501. Wedge-shaped grooves 502 are respectively formed at one ends of the two base block main bodies 501 that are away from each other. Through holes 503 are formed on the bottom plates of the wedge-shaped grooves 502, and the through holes 503 penetrate through the base block main bodies 501. Tension wedge blocks 6 that match themselves are placed in the wedge-shaped grooves 502;

[0035] The tensile wedge block 6 includes a wedge block body 601. A connecting hole 603 that matches the position of the through hole 503 is drilled in the wedge block body 601. The connecting hole 603 penetrates through the wedge block body 601. An installation groove 602 is drilled in the wedge block body 601, and the installation groove 602 communicates the connecting hole 603 with the outside. A fixing groove 604 that matches the position of the connecting hole 603 is drilled at one end of the wedge block body 601 away from the tensile base block 5. A bolt 3 to be detected is arranged between two jig bodies 1. Two ends of the bolt 3 to be detected respectively penetrate through two groups of tensile base blocks 5 and tensile wedge blocks 6. The bolt head of the bolt 3 to be detected is placed in the fixing groove 604 of the lower tensile wedge block 6. A fixing nut 4 is threadedly connected to one side of the bolt 3 to be detected away from the bolt head. The fixing nut 4 is located in the fixing groove 604 of the upper tensile wedge block 6.

[0036] Particularly, in this application, 1 also needs to be connected to a power device such as a hydraulic device to provide power for the tensile experiment. This is common knowledge for those skilled in the art, so it is not disclosed in detail in this application.

[0037] In this application, the fixture for fixing the bolt 3 to be detected is divided into two detachable parts: a tensile base block 5 and a tensile wedge block 6. In the experiment preparation stage, the bolt 3 to be detected is sequentially passed through two groups of tensile base blocks 5 and tensile wedge blocks 6, and a fixing nut 4 is screwed onto the bolt 3 to be detected. The bolt head part of the bolt 3 to be detected and the fixing nut 4 are located on both sides of two groups of tensile base blocks 5 and tensile wedge blocks 6, completing the installation work of the bolt 3 to be detected.

[0038] When the bolt 3 to be detected undergoes large deformation at the fracture during the tensile experiment and the remaining part of the bolt 3 to be detected cannot be directly taken out through the connecting hole 603, the tensile base block 5 and the tensile wedge block 6 can be separated, and the remaining part of the fractured bolt 3 to be detected can be taken out along the direction of the installation groove 602, so that the fractured bolt is not easily stuck in the fixture, is convenient to disassemble, and is not likely to affect the detection efficiency of the bolt.

[0039] The second implementation manner:

[0040] Figures 4-7There is shown a bolt tensile strength testing device. The fixed nut 4 and the tensile base block 5 are both made of magnetic materials. One end of the wedge block body 601 close to the bottom plate of the wedge-shaped groove 502 is fixedly connected with an electromagnetic ring 605, and the electromagnetic ring 605 is embedded in the wedge block body 601. A plurality of auxiliary cavities 504 are drilled on the bottom plate of the wedge-shaped groove 502, and the auxiliary cavities 504 penetrate through the base block body 501. A locking ring 7 matching with itself is threadedly connected at the opening of the auxiliary cavity 504 close to one end of the tensile wedge block 6. A power column 8 is inserted into the locking ring 7. The power column 8 includes a column body 801 inserted on the locking ring 7. A first piston 802 matching with the size of the auxiliary cavity 504 is sleeved on the outer wall of the column body 801. A second piston 9 is slidably connected in the auxiliary cavity 504, and the second piston 9 is located on the side of the power column 8 away from the locking ring 7. A viewing lens 10 matching with itself is fixedly connected at the opening of the auxiliary cavity 504 on the side away from the locking ring 7. The first piston 802 and the second piston 9 divide the auxiliary cavity 504 into three parts, namely an activity chamber 505, a transition chamber 506 and an energy storage chamber 507 in sequence from the locking ring 7 to the viewing lens 10. Air is filled in both the activity chamber 505 and the energy storage chamber 507, and hydraulic oil is filled in the transition chamber 506. The power column 8 floats in the hydraulic oil.

[0041] In this embodiment, when the tensile base block 5 and the tensile wedge block 6 need to fix the bolt 3 to be detected, during the placement of the tensile wedge block 6, the electromagnetic ring 605 is started, and a suction force is generated with the tensile base block 5, as Figure 10 shown. The suction force generated between the tensile wedge block 6 and the tensile base block 5 will press the column body 801 into the auxiliary cavity 504 until the lower end of the column body 801 contacts the second piston 9 and pushes the second piston 9 downward, compressing and storing energy for the air. At the same time, under the action of the hydraulic pressure of the hydraulic oil, it will drive the first piston 802 and the second piston 9 to move downward synchronously. The existence of the transition chamber 506 can make the pressure transmission more uniform and reduce the possibility of damage due to excessive local pressure in the energy storage chamber 507. After the bolt 3 to be detected is detected, the electromagnetic ring 605 is powered off. At this time, the compressed air in the energy storage chamber 507 will push the second piston 9 upward, pushing the tensile wedge block 6, so that the tensile base block 5 and the tensile wedge block 6 are separated, facilitating the staff to carry out disassembly and replacement work, further increasing the detection efficiency. After the tensile wedge block 6 is completely taken out, the whole power column 8 floats upward under the action of the hydraulic oil until the blade 805 contacts the column body 801.

[0042] Please refer to Figure 8 , the locking ring 7 includes a ring body 701. A plurality of notch grooves 702 are drilled on the side wall of the ring body 701. On the one hand, the notch grooves 702 keep the activity chamber 505 communicating with the outside air, facilitating the movement of the power column 8. On the other hand, it also facilitates the disassembly of the locking ring 7, facilitating the replacement of the power column 8 and the hydraulic oil.

[0043] Please refer toFigure 6 The viewing lens 10 is a convex mirror. The second piston 9 and the first piston 802 are made of transparent materials, which is convenient for maintenance personnel to observe whether there are flocculent impurities in the hydraulic oil, so as to judge whether the hydraulic oil has deteriorated and whether it needs to be replaced.

[0044] The lower end of the ring body 701 is fixedly connected with an annular lamp 703. The light generated by the annular lamp 703 is used to enhance the observation effect of the flocs in the hydraulic oil, which is convenient for technicians to detect in time.

[0045] Please refer to Figures 6-7 and Figure 9 On the side wall of the column body 801, a bearing ring 803 is rotatably connected. On the outside of the bearing ring 803, an attachment ring 804 is rotatably connected. A plurality of blades 805 are fixedly connected to the attachment ring 804, which increases the damping of the power column 8 when it moves under the action of the hydraulic oil, making the movement of the power column 8 smoother. A plurality of through holes 806 are drilled in each of the plurality of blades 805. On the one hand, it further increases the damping generated when the power column 8 moves. On the other hand, it enables the blades 805 to stir the hydraulic oil during rotation, which is convenient for maintenance personnel to observe the flocculent impurities in the hydraulic oil.

[0046] A compression spring 11 is connected between the second piston 9 and the viewing lens 10. The two ends of the compression spring 11 are respectively fixedly connected to the second piston 9 and the viewing lens 10, which increases the energy storage limit in the energy storage chamber 507 and is convenient for the subsequent separation of the tension base block 5 and the tension wedge block 6.

[0047] Compared with the first embodiment, in this embodiment, through the excavation of the auxiliary chamber 504 and the structural design of the locking ring 7, the power column 8, the second piston 9 and the viewing lens 10 in the auxiliary chamber 504, the tension base block 5 and the tension wedge block 6 can be quickly combined and separated according to the working state, which is convenient for the staff to disassemble and replace, and further improves the detection efficiency.

[0048] At the same time, by refining the structure of the power column 8, on the one hand, the damping generated when the power column 8 moves is increased, making the movement of the power column 8 smoother. On the other hand, the blades 805 can stir the hydraulic oil during rotation, which is convenient for maintenance personnel to observe the flocculent impurities in the hydraulic oil, so as to judge whether the hydraulic oil has deteriorated and whether it needs to be replaced.

[0049] Particularly, in this application, the power supply mode and the switching method of the electro-related structures, namely the electromagnetic ring 605 and the annular lamp 703, are well-known technologies to those skilled in the art, so they are not disclosed in detail in this application. Those skilled in the art can make reasonable designs according to actual usage requirements to meet the usage requirements of this application.

[0050] Combined with the current actual requirements, the above-mentioned implementation manners adopted in this application, the scope of protection is not limited thereto. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A bolt tensile strength testing device, comprising a pair of clamp bodies (1) whose positions match each other, and a placement groove (2) is cut at one end of the two clamp bodies (1) close to each other, characterized in that: A tension base block (5) is placed in each of the two placement grooves (2), and each of the two tension base blocks (5) comprises a base block body (501), and a wedge-shaped groove (502) is bored at one end of the two base block bodies (501) away from each other, and a through hole (503) is bored on the groove bottom plate of the wedge-shaped groove (502), and the through hole (503) penetrates the base block body (501), and a tension wedge block (6) matching the wedge-shaped groove (502) is placed in the wedge-shaped groove (502); The tension wedge (6) comprises a wedge body (601), a connection hole (603) is bored on the wedge body (601) and matches the position of the through hole (503), the connection hole (603) penetrates the wedge body (601), a mounting groove (602) is bored on the wedge body (601), and the mounting groove (602) connects the connection hole (603) with the outside, and a position matching the connection hole (603) is bored on one end of the wedge body (601) away from the tension base block (5). A fixing groove (604) is provided between the two clamp bodies (1), a bolt (3) to be detected is provided between the two clamp bodies (1), two ends of the bolt (3) to be detected respectively pass through two groups of tension base blocks (5) and tension wedge blocks (6), a bolt head of the bolt (3) to be detected is placed in the fixing groove (604) of the lower tension wedge block (6), and a fixing nut (4) is threadedly connected to the side of the bolt (3) to be detected away from the bolt head, and the fixing nut (4) is located in the fixing groove (604) of the upper tension wedge block (6).

2. A bolt tensile strength testing device according to claim 1, characterized in that: The fixing nut (4) and the tension base block (5) are both made of magnetic materials. An electromagnetic ring (605) is fixedly connected to one end of the wedge block body (601) close to the bottom plate of the wedge groove (502), and the electromagnetic ring (605) is embedded in the wedge block body (601). A plurality of auxiliary cavities (504) are excavated on the bottom plate of the wedge groove (502), and the auxiliary cavities (504) penetrate the base block body (501). A locking ring (7) matching the auxiliary cavity (504) is threadedly connected to an opening of the auxiliary cavity (504) close to one end of the tension wedge block (6). A power column (8) is inserted into the locking ring (7). The power column (8) includes a column (801) inserted into the locking ring (7), and an outer wall of the column (801) is provided with a locking ring (7) matching the auxiliary cavity (504). The auxiliary chamber (504) is provided with a piston 1 (802) of a size matching that of the auxiliary chamber (504), a piston 2 (9) is slidably connected in the auxiliary chamber (504), and the piston 2 (9) is located on the side of the power column (8) away from the locking ring (7), and a viewing lens (10) matching the auxiliary chamber (504) is fixedly connected at the opening of the auxiliary chamber (504) on the side away from the locking ring (7), and the piston 1 (802) and the piston 2 (9) divide the auxiliary chamber (504) into three parts, namely, an activity chamber (505), a transition chamber (506) and an energy storage chamber (507) in a direction from the locking ring (7) to the viewing lens (10), the activity chamber (505) and the energy storage chamber (507) are both filled with air, the transition chamber (506) is filled with hydraulic oil, and the power column (8) floats in the hydraulic oil.

3. A bolt tensile strength testing device according to claim 2, characterized in that: The locking ring (7) comprises a ring body (701), and a plurality of notched grooves (702) are cut on the side wall of the ring body (701).

4. The bolt tensile strength testing device according to claim 2, characterized in that: The viewing lens (10) is a convex mirror, and the second piston (9) and the first piston (802) are made of transparent material.

5. The bolt tensile strength testing device according to claim 3 is characterized in that: A ring light (703) is fixedly connected to the lower end of the ring body (701).

6. The bolt tensile strength testing device according to claim 2, characterized in that: The side wall of the column (801) is rotatably connected to a bearing ring (803), the outer side of the bearing ring (803) is rotatably connected to an attachment ring (804), and a plurality of blades (805) are fixedly connected to the attachment ring (804).

7. A bolt tensile strength testing device according to claim 6, characterized in that: A plurality of through holes (806) are drilled on each of the plurality of blades (805).

8. The bolt tensile strength testing device according to claim 4, characterized in that: A compression spring (11) is connected between the second piston (9) and the viewing lens (10), and two ends of the compression spring (11) are fixedly connected to the second piston (9) and the viewing lens (10) respectively.

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