T-bolt torsion device, test platform embedded structure frame and test platform foundation

Abstract

The utility model provides a kind of T bolt torsion resistance device, test platform embedded structure frame and test platform foundation, belong to the basic technical field of special purpose.T bolt torsion resistance device includes anchoring plate and protective box, rectangular hole is equipped on anchoring plate, the middle part of two long sides on anchoring plate bottom surface in rectangular hole is equipped with the anti-torsion slot for T bolt head part carding or the anti-torsion block for being fixed in the diagonal of two long sides for with T bolt head part rotation stop cooperation, in the length direction of rectangular hole, the edge of the side of two anti-torsion slots away from each other or the edge of the side of two anti-torsion blocks close to each other is respectively fixed with guide piece, two guide pieces extend towards the box bottom of protective box and are arranged about rectangular hole center center-symmetric, two guide pieces have guide part, when operating, only need to be placed in protective box after T bolt, rotate T bolt to specific direction to not be able to rotate, then directly lift, and it is not necessary to try to control the rotation angle of T bolt multiple times, it is simple and convenient to operate.

Description

Technical Field

[0001] This utility model relates to a T-bolt anti-torsion device, a pre-embedded structural frame for a test platform, and a foundation for a test platform, belonging to the field of basic technology for special purposes. Background Technology

[0002] In recent years, the wind power industry has been developing towards giant scale, with installed capacity increasing day by day. This has placed increasingly stringent requirements on the reliability of various components of wind turbine units. As one of the important components of a wind turbine system, the wind turbine gearbox needs to undergo simulation tests under various operating conditions before it is installed and put into operation. Therefore, it is necessary to establish a test platform for testing.

[0003] Test platforms typically conduct accelerated life testing of engine rooms, reliability testing, control system testing and verification, and performance testing of new drivetrains. Therefore, a test platform must consist of a platform foundation, drive system, multi-degree-of-freedom loading system, electrical control system, hydraulic system, and cooling system. During start-up, shutdown, and operation, the combined system generates various bending moments, torques, and impacts. To ensure testing accuracy, the platform foundation must not develop pits or cracks under these loads.

[0004] Chinese utility model patent CN217630068U discloses an anchoring device for a large vibration table actuator. The device includes a T-shaped anchor bolt, a steel sleeve, an anchoring plate, a bearing plate, and a protective sleeve. The protective sleeve is fixed to the bottom surface of the anchoring plate, and the steel sleeve is fixed to the top surface of the anchoring plate. A rectangular hole is provided in the center of the anchoring plate, which communicates with the inner cavities of the steel sleeve and the protective sleeve. During manufacturing, the steel sleeve, anchoring plate, and protective sleeve are pre-embedded in a concrete foundation, and fine aggregate concrete is backfilled under the bearing plate. The head of the T-type anchor bolt passes through the steel sleeve and anchor plate in sequence and extends into the inner cavity of the protective cylinder. The bottom surface of the anchor plate has a positioning groove (i.e., anti-torsion groove) in the middle of the two long sides of the rectangular hole. When the T-type anchor bolt is lowered into the protective cylinder, the T-type anchor bolt is lifted and rotated 90 degrees. The head of the T-type anchor bolt can be embedded in the positioning groove, thereby preventing the T-type anchor bolt from rotating when the nut is installed, and playing a role in resisting torque.

[0005] Regarding the anti-torsion method of T-bolts, Yin Xiangjian et al. published a paper entitled "Construction Quality Control of T-bolt Sleeves" in Steel Structures, Vol. 24, No. 11, 2009 (Total No. 126), which disclosed the method of fixing anti-torsion blocks on the bottom surface of the anchor plate (the paper also disclosed a pre-embedded structural frame for use in concrete foundations, with the anchor plate fixed on the frame of the pre-embedded structural frame). Specifically, an anti-torsion block is fixed at the diagonal of the two long sides of the rectangular hole. When the T-bolt is lifted and rotated 90 degrees, the head of the T-bolt can be inserted between the two anti-torsion blocks, thus preventing rotation with the two anti-torsion blocks.

[0006] Both of the above methods require lifting the T-bolt and rotating it 90 degrees. This is difficult for workers to control precisely. If the rotation is insufficient or excessive, the head of the T-bolt will hit other structures instead of fitting snugly into the anti-torsion groove or between the two anti-torsion blocks. This often requires multiple attempts, making the operation very inconvenient. Furthermore, when the T-bolt is deformed and needs replacement, it must be accurately reversed 90 degrees so that the head's contour aligns with the rectangular hole before it can be pulled out. This also often requires multiple attempts to achieve the correct alignment, making disassembly very inconvenient. Utility Model Content

[0007] The purpose of this utility model is to provide a T-bolt anti-torsion device to solve the problem in the prior art that multiple attempts are required to get the head of the T-bolt into the anti-torsion groove or between two anti-torsion blocks when installing T-bolts, which leads to inconvenience in operation; the purpose of this utility model is also to provide a test platform pre-embedded structure frame and test platform foundation to solve the above problems.

[0008] To achieve the above objectives, the T-bolt anti-torsion device of this utility model adopts the following technical solution: The T-bolt anti-torsion device includes an anchor plate and a protective box fixed to the bottom surface of the anchor plate. The anchor plate has a rectangular hole through which the head of the T-bolt passes. On the bottom surface of the anchor plate, there is an anti-torsion groove in the middle of the two long sides of the rectangular hole for the head to be inserted, or an anti-torsion block is fixed at the diagonal of the two long sides for anti-torsion engagement with the head to prevent rotation. In the length direction of the rectangular hole, guide members are fixed to the edges of the two anti-torsion grooves that are far apart or the edges of the two anti-torsion blocks that are close together. The two guide members extend toward the bottom of the protective box and are centrally symmetrical about the center of the rectangular hole. The two guide members have a guide part that allows the head of the T-bolt to enter into the protective box and rotate a certain angle to engage with the head, and that keeps in contact with the head during the upward movement of the T-bolt and finally guides the head into the two anti-torsion grooves or between the anti-torsion blocks.

[0009] The beneficial effects of the above technical solution are as follows: This utility model is an improved invention. Guide members are fixed to the edges of the two anti-torsion grooves on opposite sides or the edges of the two anti-torsion blocks on opposite sides along the length of the rectangular hole. The two guide members extend towards the bottom of the protective box and are centrally symmetrical about the center of the rectangular hole. Both guide members have guiding parts. After the head of the T-bolt enters the protective box and rotates a certain angle, the guiding parts of the two guide members engage with the head of the T-bolt. Subsequently, during the lifting of the T-bolt, the two guiding parts remain in contact with the head of the T-bolt until the head is guided into the two anti-torsion grooves or between the anti-torsion blocks, achieving a non-rotational engagement between the head and the two anti-torsion grooves or blocks. Therefore, in operation, this utility model only requires rotating the T-bolt in a specific direction after it is lowered into the protective box until it cannot rotate further, and then lifting it directly. It eliminates the need for multiple attempts to control the rotation angle of the T-bolt, making operation simple and convenient.

[0010] Furthermore, the two guides also have stops that are respectively aligned with the elongated hole walls of the rectangular holes to stop the head of the T-bolt during the lifting and lowering of the T-bolt.

[0011] Furthermore, the guide portion and the stop portion are mutually perpendicular planes.

[0012] Furthermore, the guide is a guide plate with a rectangular cross-section, the guide portion is formed by the wide side of the guide plate, and the stop portion is formed by the narrow side of the guide plate.

[0013] Furthermore, the guide is a guide plate with a rectangular cross-section, and the guide portion is formed by the wide side of the guide plate.

[0014] Furthermore, both guides extend at an angle and gradually approach the side wall of the protective box from top to bottom.

[0015] Furthermore, the bottoms of both guides are fixed to the bottom of the protective box.

[0016] Furthermore, in the width direction of the rectangular hole, the width of the guide is equal to the width of the anti-torsion groove or anti-torsion block.

[0017] To achieve the above objectives, the pre-embedded structural frame of the test platform in this utility model adopts the following technical solution: The test platform has a pre-embedded structural frame, including a frame body and a T-bolt anti-torsion device fixed on the frame body. The T-bolt anti-torsion device includes an anchor plate and a protective box fixed on the bottom surface of the anchor plate. The anchor plate has a rectangular hole for the head of the T-bolt to pass through. On the bottom surface of the anchor plate, there is an anti-torsion groove in the middle of the two long sides of the rectangular hole for the head to be inserted, or an anti-torsion block is fixed at the diagonal of the two long sides for anti-torsion engagement with the head to prevent rotation. In the length direction of the rectangular hole, guide members are fixed on the edge of the two anti-torsion grooves that are far apart or the edge of the two anti-torsion blocks that are close together. The two guide members extend toward the bottom of the protective box and are centrally symmetrical about the center of the rectangular hole. The two guide members have a guide part that allows the head of the T-bolt to enter into the protective box and rotate a certain angle to engage with the head, and that keeps in contact with the head during the upward movement of the T-bolt and finally guides the head into the two anti-torsion grooves or between the anti-torsion blocks.

[0018] The beneficial effects of the above technical solution are as follows: This utility model is an improved invention. Guide members are fixed to the edges of the two anti-torsion grooves on opposite sides or the edges of the two anti-torsion blocks on opposite sides along the length of the rectangular hole. The two guide members extend towards the bottom of the protective box and are centrally symmetrical about the center of the rectangular hole. Both guide members have guiding parts. After the head of the T-bolt enters the protective box and rotates a certain angle, the guiding parts of the two guide members engage with the head of the T-bolt. Subsequently, during the lifting of the T-bolt, the two guiding parts remain in contact with the head of the T-bolt until the head is guided into the two anti-torsion grooves or between the anti-torsion blocks, achieving a non-rotational engagement between the head and the two anti-torsion grooves or blocks. Therefore, in operation, this utility model only requires rotating the T-bolt in a specific direction after it is lowered into the protective box until it cannot rotate further, and then lifting it directly. It eliminates the need for multiple attempts to control the rotation angle of the T-bolt, making operation simple and convenient.

[0019] Furthermore, the two guides also have stops that are respectively aligned with the elongated hole walls of the rectangular holes to stop the head of the T-bolt during the lifting and lowering of the T-bolt.

[0020] Furthermore, the guide portion and the stop portion are mutually perpendicular planes.

[0021] Furthermore, the guide is a guide plate with a rectangular cross-section, the guide portion is formed by the wide side of the guide plate, and the stop portion is formed by the narrow side of the guide plate.

[0022] Furthermore, the guide is a guide plate with a rectangular cross-section, and the guide portion is formed by the wide side of the guide plate.

[0023] Furthermore, both guides extend at an angle and gradually approach the side wall of the protective box from top to bottom.

[0024] Furthermore, the bottoms of both guides are fixed to the bottom of the protective box.

[0025] Furthermore, in the width direction of the rectangular hole, the width of the guide is equal to the width of the anti-torsion groove or anti-torsion block.

[0026] To achieve the above objectives, the experimental platform foundation of this utility model adopts the following technical solution: The test platform foundation includes a concrete foundation and an embedded structural frame. The embedded structural frame includes a frame body and a T-bolt anti-torsion device fixed to the frame body. The T-bolt anti-torsion device includes an anchor plate and a protective box fixed to the bottom surface of the anchor plate. The anchor plate has a rectangular hole for the head of the T-bolt to pass through. On the bottom surface of the anchor plate, there is an anti-torsion groove in the middle of the two long sides of the rectangular hole for the head to be inserted, or an anti-torsion block is fixed at the diagonal of the two long sides for anti-torsion engagement with the head to prevent rotation. In the length direction of the rectangular hole, guide members are fixed on the edge of the two anti-torsion grooves that are far apart or the edge of the two anti-torsion blocks that are close together. The two guide members extend toward the bottom of the protective box and are centrally symmetrical about the center of the rectangular hole. The two guide members have a guide part that allows the head of the T-bolt to enter the protective box and rotate a certain angle to engage with the head, and that keeps in contact with the head during the upward movement of the T-bolt and finally guides the head into the two anti-torsion grooves or between the anti-torsion blocks.

[0027] The beneficial effects of the above technical solution are as follows: This utility model is an improved invention. Guide members are fixed to the edges of the two anti-torsion grooves on opposite sides or the edges of the two anti-torsion blocks on opposite sides along the length of the rectangular hole. The two guide members extend towards the bottom of the protective box and are centrally symmetrical about the center of the rectangular hole. Both guide members have guiding parts. After the head of the T-bolt enters the protective box and rotates a certain angle, the guiding parts of the two guide members engage with the head of the T-bolt. Subsequently, during the lifting of the T-bolt, the two guiding parts remain in contact with the head of the T-bolt until the head is guided into the two anti-torsion grooves or between the anti-torsion blocks, achieving a non-rotational engagement between the head and the two anti-torsion grooves or blocks. Therefore, in operation, this utility model only requires rotating the T-bolt in a specific direction after it is lowered into the protective box until it cannot rotate further, and then lifting it directly. It eliminates the need for multiple attempts to control the rotation angle of the T-bolt, making operation simple and convenient.

[0028] Furthermore, the two guides also have stops that are respectively aligned with the elongated hole walls of the rectangular holes to stop the head of the T-bolt during the lifting and lowering of the T-bolt.

[0029] Furthermore, the guide portion and the stop portion are mutually perpendicular planes.

[0030] Furthermore, the guide is a guide plate with a rectangular cross-section, the guide portion is formed by the wide side of the guide plate, and the stop portion is formed by the narrow side of the guide plate.

[0031] Furthermore, the guide is a guide plate with a rectangular cross-section, and the guide portion is formed by the wide side of the guide plate.

[0032] Furthermore, both guides extend at an angle and gradually approach the side wall of the protective box from top to bottom.

[0033] Furthermore, the bottoms of both guides are fixed to the bottom of the protective box.

[0034] Furthermore, in the width direction of the rectangular hole, the width of the guide is equal to the width of the anti-torsion groove or anti-torsion block. Attached Figure Description

[0035] Figure 1 This is a partial structural diagram of the basic implementation of the experimental platform of this utility model; Figure 2 This is a front view of the pre-embedded structural frame in the basic embodiment of the test platform of this utility model; Figure 3 This is a partial perspective view of the pre-embedded structural frame in the basic embodiment of the test platform of this utility model; Figure 4 This is a perspective view of the fixing frame of the pre-embedded structural frame in the basic embodiment of the test platform of this utility model; Figure 5 This is a perspective view (partially cut open) of Embodiment 1 of the T-bolt anti-torsion device in the basic implementation of the test platform of this utility model. Figure 6 This is a top view of Embodiment 1 of the T-bolt anti-torsion device in the basic implementation of the test platform of this utility model; Figure 7 for Figure 6 Sectional view along line AA in the middle; Figure 8 This is a perspective view of the casting sheath in the basic embodiment of the test platform of this utility model. Figure 9 This is a perspective view of the T-bolt in the basic embodiment of the test platform of this utility model; Figure 10 This is a perspective view (partially cut open) of Embodiment 2 of the T-bolt anti-torsion device in the basic implementation of the test platform of this utility model.

[0036] In the diagram: 1. Square base; 2. Fixing frame; 21. Frame body; 22. Support leg; 3. Anchor plate; 31. Rectangular hole; 311. Long hole wall; 312. Short hole wall; 32. Adjustment hole; 33. Fixing hole; 34. Anti-torsion block; 35. Anti-torsion groove; 4. Protective box; 41. Box bottom; 5. Casting sleeve; 51. Angle steel; 6. Upper surface base plate; 7. T-bolt; 71. Head; 72. Threaded hole; 8. Nut; 9. Equipment base; 10. Guide plate; 101. Wide side; 102. Narrow side; 11. Primary grouting concrete; 12. Secondary grouting concrete. Detailed Implementation

[0037] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0038] The implementation method of the experimental platform foundation in this utility model is as follows: like Figure 1 As shown, the foundation of the test platform includes a concrete foundation and a pre-embedded structural frame embedded in the concrete foundation. The concrete foundation includes primary grouting concrete 11 and secondary grouting concrete 12.

[0039] Pre-embedded structural frame, such as Figure 2 , Figure 3 and Figure 4 As shown, the system includes a square base 1, a fixing frame 2, an anchor plate 3, a protective box 4, a casting sleeve 5, and an upper surface base plate 6. The fixing frame 2 comprises multiple frames, each including a frame body 21 and multiple legs 22 fixed to the frame body 21. The bottom of each leg 22 is welded to and fixed with a square base 1. The square base 1 has through holes at its four corners for fixing to the ground using expansion bolts or chemical bolts.

[0040] Anchor plate 3 and protective box 4 constitute a torsion-resistant device for T-bolts. Anchor plate 3 is supported and fixed on frame 21 of fixing frame 2. Protective box 4 is fixed on the bottom surface of anchor plate 3. Cast protective sleeve 5 is fixed on the top surface of anchor plate 3. Cast protective sleeve 5, anchor plate 3 and protective box 4 are used to protect T-bolt 7 and can prevent T-bolt 7 from rotating when installing test equipment, thus playing a role in resisting torque.

[0041] Specifically, such as Figure 5 and Figure 6 As shown, the anchor plate 3 is provided with a head 71 for the T-bolt 7. Figure 9 The rectangular hole 31 (as shown) passes through the rectangular hole, which includes two long hole walls 311 and two short hole walls 312. In this embodiment, anti-torsion blocks 34 for anti-rotation engagement with the head 71 of the T-bolt 7 are fixed at the diagonal points of the two long sides of the rectangular hole 31 on the bottom surface of the anchor plate 3. One side of the anti-torsion block 34 is flush with the corresponding side of the long hole wall 311, and the two anti-torsion blocks 34 are arranged centrally symmetrically about the center of the rectangular hole 31.

[0042] The rectangular hole 31 is slightly larger than the head 71 so that the head 71 can pass through. The width of the rectangular hole 31 is less than the length of the head 71 so that after the head 71 passes through the rectangular hole 31 and rotates 90 degrees, it can stop and engage with the bottom surface of the anchor plate 3 in the upward direction.

[0043] Along the length of the rectangular hole 31, the spacing between the two anti-torsion blocks 34 is adapted to the width of the head 71 so that after the head 71 passes through the rectangular hole 31 and rotates 90 degrees, the head 71 can be engaged between the two anti-torsion blocks 34, thereby preventing the head 71 from rotating in a certain circumferential direction.

[0044] Along the length of the rectangular hole 31, guide members are fixed to the edges of the two anti-torsion blocks 34 on their adjacent sides. In this embodiment, the guide members are guide plates 10 with a rectangular cross-section. The two guide plates 10 extend toward the bottom 41 of the protective box 4, and are arranged symmetrically about the center of the rectangular hole 31. The two guide plates 10 have a mechanism for the head 71 of the T-bolt 7 to enter the protective box 4 and rotate a certain angle to engage with the head 71. The guide plates 10 are in contact with the head 71 during the upward movement of the T-bolt 7 and ultimately guide the head 71 to the guide portion between the two anti-torsion blocks 34.

[0045] Since the guide is a guide plate, the guide portion is flat, specifically formed by the wide side 101 of the guide plate 10. During operation, simply lower the head 71 of the T-bolt 7 into the protective box 4, and rotate it in a specific direction (either clockwise or counterclockwise). Figure 6 Rotate the T-bolt 7 clockwise until it can no longer be rotated (at this point, the head 71 is stopped by the bottom of the wide side 101 of the two guide plates 10). Then lift the T-bolt 7 directly. The wide side 101 is in contact with the head 71 throughout the upward movement of the T-bolt 7, thus playing a guiding role. Finally, the head 71 is guided between the two anti-torsion blocks 34. Compared with the existing technology, it is not necessary to try to control the rotation angle of the T-bolt 7 multiple times, making the operation simple and convenient.

[0046] Furthermore, one narrow side 102 of the guide plate 10 is aligned with the side of the anti-torsion block 34 and the wall of the elongated hole 311 on the corresponding side. Thus, during the lifting and lowering of the T-bolt 7, taking the lowering as an example, the head 71 of the T-bolt 7 passes through the rectangular hole 31 and moves downward along the side of the anti-torsion block 34 and the narrow side 102 of the guide plate 10 in sequence. During this process, the narrow sides 102 of the two guide plates 10 can make contact with the head 71 of the T-bolt 7 to prevent the T-bolt 7 from rotating counterclockwise until the head 71 touches the bottom 41 of the protective box 4. Since the T-bolt 7 still cannot rotate counterclockwise, a clear indication is given, so that the operator knows that the T-bolt 7 should be rotated clockwise next until the head 71 makes contact with the two wide sides 101. This gives another clear indication, so that the operator knows that the T-bolt 7 should be lifted next, so that the head 71 is finally inserted between the two anti-torsion blocks 34 under the guidance of the two wide sides 101.

[0047] Therefore, although the operator cannot see the T-bolt 7 inside the protective box 4, the installation of the T-bolt 7 can be completed very easily thanks to the well-designed stop and guide structure. When it is necessary to remove the T-bolt 7, simply lower the T-bolt 7 to the bottom, then rotate the T-bolt 7 counterclockwise until the head 71 of the T-bolt 7 stops at the two narrow sides 102. Then, simply lift the T-bolt 7 to ensure that the head 71 can be directly pulled out into the rectangular hole 31. This eliminates the need for multiple angle adjustments and makes the operation very convenient.

[0048] Therefore, the narrow side 102 forms a stop (also a plane) that can stop and contact the head 71 of the T-bolt 7 during the lifting and lowering of the T-bolt 7, thereby facilitating the installation and removal of the T-bolt 7. Furthermore, since the guide plate 10 has a rectangular cross-section, and the wide side 101 is perpendicular to the narrow side 102, the guide and stop in this embodiment are mutually perpendicular planes.

[0049] Furthermore, combined Figure 7 As shown, both guide plates 10 extend obliquely and gradually approach the side wall of the protective box 4 from top to bottom. That is, when projected onto the width direction of the rectangular hole 31, the two guide plates 10 are arranged in a figure-eight shape. Thus, when installing the T-bolt 7, after the head 71 of the T-bolt 7 is placed on the bottom 41 of the protective box 4, the T-bolt 7 needs to rotate through an angle greater than 90 degrees (i.e., a certain angle greater than 90 degrees, the specific degree being determined by the inclination of the guide plates 10) to make the head 71 make contact with the wide side surface 101 of the two guide plates 10. During the upward movement of the T-bolt 7, under the guidance of the oblique wide side surface 101, the head 71 of the T-bolt 7 is gradually "aligned", and finally the length direction of the head 71 is perpendicular to the length direction of the rectangular hole 31, thereby locking between the two anti-torsion blocks 34.

[0050] In other embodiments, the two guide plates 10 can extend vertically. In this case, after the head 71 is placed on the bottom 41 of the box, it only needs to be rotated 90 degrees (i.e., the aforementioned certain angle is equal to 90 degrees) to make the head 71 make contact with the wide side surface 101 of the two guide plates 10. In both configurations, when the guide plate 10 is vertically configured, the head 71 of the T-bolt 7 is in surface contact with the wide side surface 101, resulting in greater frictional resistance; while when the guide plate 10 is inclined, the head 71 is not in surface contact with the wide side surface 101, resulting in less frictional resistance.

[0051] Furthermore, the bottoms of both guide plates 10 are fixed to the bottom 41 of the protective box 4, ensuring that the head 71 of the T-bolt 7 can always contact the guide plate 10 during lifting and lowering, while also strengthening the connection structure between the anchor plate 3 and the protective box 4. In other embodiments, there may be a gap between the bottom of the guide plate 10 and the bottom 41 of the box, as long as the gap is less than the thickness of the head 71, ensuring that the head 71 can also contact the guide plate 10 when it is located at the bottom 41 of the box.

[0052] Furthermore, in the width direction of the rectangular hole 31, the width of the guide plate 10 is equal to the width of the anti-torsion block 34. That is, the two narrow sides 102 of the guide plate 10 are respectively aligned with the two sides of the corresponding anti-torsion block 34. The width of the guide plate 10 is just right, which can save materials and reduce weight. In other embodiments, the width of the guide plate 10 may also be greater than or less than the width of the anti-torsion block 34. In this case, only one narrow side 102 of the guide plate 10 is aligned with one side of the corresponding anti-torsion block 34, while the other narrow side is not aligned.

[0053] like Figure 10 The following is an embodiment 2 of the T-bolt anti-torsion device. The difference between this embodiment and embodiment 1 is that the anti-torsion block is no longer provided. Instead, an anti-torsion groove 35 is provided on the bottom surface of the anchor plate 3 at the middle of the two long sides of the rectangular hole 31 for the head 71 of the T-bolt 7 to be inserted. Guide plates 10 are fixed on the edges of the two anti-torsion grooves 35 on the opposite sides. The function of the two guide plates 10 is also to guide the head 71 of the T-bolt 7 so that the head 71 is finally inserted into the two anti-torsion grooves 35, thereby achieving anti-rotation engagement with the anchor plate 3.

[0054] Preferably, in the width direction of the rectangular hole 31, the width of the guide plate 10 is equal to the width of the anti-torsion groove 35. In other embodiments, it may be greater than or less than the width of the anti-torsion groove 35.

[0055] In other embodiments, when the guide portion and the stop portion are mutually perpendicular planes, the guide member can also be a square guide post with a square cross-section or a triangular guide post with a right-angled triangle cross-section. In other embodiments, the guide member can also be a cylinder, in which case the guide portion and the stop portion are no longer mutually perpendicular planes, but smooth curved surfaces, and the guide portion and the stop portion are in line contact with the head of the T-bolt.

[0056] In other embodiments, even if the guide is a guide plate, the guide plate may only have a guiding effect on the head of the T-bolt on the wide side, while the narrow side does not, that is, the narrow side is not aligned with the long wall of the rectangular hole. Of course, when the guide is a square guide post, a triangular guide post, or a cylinder, there may only be a guiding part and no stopping part. In these cases, this utility model only solves the problem that the head of the T-bolt needs to be inserted into the anti-torsion groove or between two anti-torsion blocks multiple times during the installation process, which leads to inconvenience in operation. It does not solve the problem that the T-bolt needs to be pulled out by adjusting the angle multiple times during the disassembly process.

[0057] The fabrication process of the experimental platform foundation of this utility model is as follows: First, a foundation pit is excavated on the laboratory floor, with the pre-embedded structural frame located within it. During construction, a concrete cushion layer is first laid at the bottom of the pit; the thickness of the cushion layer should not be too thin to accommodate expansion bolts or chemical bolts. Then, lines are drawn on the cushion layer and reinforcing bars are laid, ensuring the reinforcing bars avoid the location of the square base 1. Next, the fixing frame 2 with the square base 1 is placed in the pit, leveled, and then secured with expansion bolts or chemical bolts. Finally, the anchor plate 3 and protective box 4 (T-bolt anti-torsion device), welded together and containing the guide plate 10, are placed onto the frame 21 of the fixing frame 2, combined with… Figure 3 , Figure 5 and Figure 6 As shown, the protective box 4 enters the frame 21. The four corners of the anchor plate 3 are provided with adjustment holes 32. The adjustment holes 32 are threaded holes and adjustment bolts are installed in the holes. The bottom of the adjustment bolts can pass through the bottom surface of the anchor plate 3 and press against the top surface of the frame 21. By controlling the extension length of the four adjustment bolts, the levelness of the anchor plate 3 can be adjusted.

[0058] After the anchor plate 3 is adjusted, it is welded to the frame 21 for reinforcement. Then, the cast-in-place sheath 5 is hoisted above the anchor plate 3, as shown. Figure 8 As shown, the casting sleeve 5 is a rectangular steel pipe, with angle steel 51 welded to its two opposite sides at the bottom. The vertical side of the angle steel 51 is welded to the side of the casting sleeve 5, and the horizontal side extends and has screw holes. Fixing holes 33 are provided on the top surface of the anchor plate 3 on one side of the two short sides of the rectangular hole 31. Figure 5 and Figure 6As shown, the fixing hole 33 is a threaded hole. A screw is used to pass through the horizontal side of the angle steel 51 and connect with the fixing hole 33 to fix the cast sleeve 5 to the top surface of the anchor plate 3. The rectangular inner hole of the cast sleeve 5 is connected to the rectangular hole 31 on the anchor plate 3 so that the head 71 of the T-bolt 7 can pass through the cast sleeve 5 and the anchor plate 3 in sequence to enter the protective box 4.

[0059] like Figure 1 As shown, C40 concrete is used for the first pour to form the first grouting concrete 11. Then, the upper surface base plate 6 is placed on the top surface of the first grouting concrete 11 and fitted over the upper end of the pouring sleeve 5. The upper end of the pouring sleeve 5 does not protrude from the upper end of the upper surface base plate 6. The levelness of the upper surface base plate 6 is adjusted, and then the second grouting is performed. The top surface of the upper surface base plate 6 is flush with or slightly higher than the top surface of the second grouting concrete 12.

[0060] Then, the head 71 of the T-bolt 7 is passed downwards through the cast-in-place sleeve 5 and the anchor plate 3 into the protective box 4 for later use. Of course, since there are many T-bolts 7, they can also be temporarily installed in areas where test equipment needs to be fixed. When the T-bolt 7 needs to be connected to the test equipment, it is first rotated at a certain angle and then lifted. Under the action of the guide plate 10, the head 71 of the T-bolt 7 is inserted into the two anti-torsion grooves or between the two anti-torsion blocks of the anchor plate 3. Then, during the lifting process, the upper end of the shank of the T-bolt 7 passes through the equipment base 9. Finally, a nut 8 is installed on the upper end of the T-bolt 7 to fix the equipment to be tested onto the test platform foundation. When the T-bolt 7 fails or deforms, it can be removed and replaced.

[0061] like Figure 9 As shown, a threaded hole 72 is provided on the end face of the shank of the T-bolt 7. Tools for lowering and raising can be connected through the threaded hole 72, which facilitates the operation of the T-bolt 7.

[0062] In use, the force exerted on the T-bolt 7 of this invention is evenly distributed into the concrete through the anchor plate 3 and the fixing frame 2. Simultaneously, the foundation is integrated into a whole through methods such as primary pouring, secondary pouring, and reinforcement laying, enhancing the tensile properties of the concrete. Under the same load conditions, the test platform foundation provided by this invention has a greater bearing capacity than ordinary ground foundations, better meeting the impact and vibration loads generated by the test platform.

[0063] The implementation method of the pre-embedded structure frame of the test platform in this utility model is as follows: the structure of the pre-embedded structure frame of the test platform is the same as that of the pre-embedded structure frame in the above-mentioned basic implementation method of the test platform, and will not be repeated here.

[0064] The implementation method of the T-bolt anti-torsion device in this utility model is as follows: The structure of the T-bolt anti-torsion device is the same as that of the T-bolt anti-torsion device in the above-mentioned test platform basic implementation method, and will not be repeated here.

Claims

1. A T-bolt anti-torsion device, comprising an anchor plate and a protective box fixed to the bottom surface of the anchor plate, wherein the anchor plate has a rectangular hole for the head of the T-bolt to pass through, and the bottom surface of the anchor plate has an anti-torsion groove at the midpoint of the two long sides of the rectangular hole for the head to be engaged, or an anti-torsion block for anti-rotation engagement with the head is fixed at the diagonal of the two long sides, characterized in that, Along the length of the rectangular hole, guide members are fixed to the edges of the two anti-torsion grooves that are far apart or the edges of the two anti-torsion blocks that are close together. The two guide members extend toward the bottom of the protective box and are arranged symmetrically about the center of the rectangular hole. The two guide members allow the head of the T-bolt to enter the protective box and rotate a certain angle to engage with the head. They also keep in contact with the head during the upward movement of the T-bolt and eventually guide the head to the guide part between the two anti-torsion grooves or the anti-torsion blocks.

2. The T-bolt anti-torsion device according to claim 1, characterized in that, The two guides also have stops that are respectively aligned with the elongated hole walls of the rectangular holes to stop the head of the T-bolt during lifting and lowering of the T-bolt.

3. The T-bolt anti-torsion device according to claim 2, characterized in that, The guide section and the stop section are mutually perpendicular planes.

4. The T-bolt anti-torsion device according to claim 3, characterized in that, The guide is a guide plate with a rectangular cross-section. The guide portion is formed by the wide side of the guide plate, and the stop portion is formed by the narrow side of the guide plate.

5. The T-bolt anti-torsion device according to claim 1, characterized in that, The guide is a guide plate with a rectangular cross-section, and the guide portion is formed by the wide side of the guide plate.

6. The T-bolt anti-torsion device according to any one of claims 1 to 5, characterized in that, Both guides extend at an angle and gradually approach the side wall of the protective box from top to bottom.

7. The T-bolt anti-torsion device according to any one of claims 1 to 5, characterized in that, The bottoms of both guides are fixed to the bottom of the protective box.

8. The T-bolt anti-torsion device according to claim 3 or 4, characterized in that, In the width direction of the rectangular hole, the width of the guide is equal to the width of the anti-torsion groove or anti-torsion block.

9. A test platform with a pre-embedded structural frame, including a frame body and a T-bolt anti-torsion device fixed to the frame body, characterized in that... The T-bolt anti-torsion device is the T-bolt anti-torsion device as described in any one of claims 1 to 8.

10. A test platform foundation, comprising a concrete foundation and an embedded structural frame in the concrete foundation, the embedded structural frame comprising a frame body and T-bolt anti-torsional devices fixed to the frame body, characterized in that... The T-bolt anti-torsion device is the T-bolt anti-torsion device as described in any one of claims 1 to 8.

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