A test platform embedded structure frame and a test platform foundation

Abstract

The utility model provides a kind of test platform pre-burying structure frame and test platform foundation, belong to the basic technical field of special purpose.Test platform pre-burying structure frame includes support frame and anchor plate welded and fixed on support frame, support frame includes multiple vertical fixed longitudinal beam and crossbeam, anchor plate is supported at least on two longitudinal beams or two crossbeams, fixed plate corresponding with the front and rear left and right four side surfaces of anchor plate is fixed on the crossbeam and / or longitudinal beam of anchor plate outside, each fixed plate is all screw thread assembly with jacking screw, jacking screw on each fixed plate is used to push anchor plate from front and rear left and right four directions to accurately position the position of anchor plate during anchor plate is placed on support frame, so it can be placed position of anchor plate by jacking screw to adjust, more convenient to operate, can improve construction efficiency.

Description

Technical Field

[0001] This utility model relates to a pre-embedded structural frame for a test platform and a foundation for the 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 CN215562774U discloses a large-scale movable anchor bolt construction device, including a concrete foundation. Within the concrete foundation are a support frame, a pre-embedded steel pipe (i.e., a sleeve), a first thick steel plate (i.e., an anchor plate), and a second thick steel plate. The anchor plate is fixed to the lower end of the sleeve and is mounted on the support frame. The second thick steel plate is fixed below the anchor plate. Several second thick steel plates are typically arranged to form a protective box, inside which two steel plate blocks are fixed. T-shaped anchor bolts (i.e., T-bolts) are installed within the sleeve. When installing the T-bolts, their heads face down, passing through the sleeve and anchor plate into the protective box. Then, the T-bolts are lifted and rotated 90°, allowing the head of the T-bolt to engage between the two steel plate blocks, preventing rotation. This facilitates the engagement of the T-bolts with nuts to fix the device to the concrete foundation.

[0005] The aforementioned support frame, sleeve, anchor plate, and protective box are typically manufactured as a single embedded structural frame. This frame is located within a pit, into which concrete is poured to form a concrete foundation. Because the concrete pouring process impacts the embedded structural frame, it must be fixed within the pit. Simultaneously, the anchor plate must also be fixed to the support frame; otherwise, any movement of the anchor plate will cause misalignment of the T-bolts, preventing them from aligning with the bolt holes on the equipment.

[0006] In actual manufacturing, to ensure a stable connection between components, anchor plates are typically welded and fixed to the support frame. The anchor plates are usually pre-welded to the protective box before being placed together on the support frame, followed by welding between the anchor plates and the support frame. Because the anchor plates are made of thick steel plates and are quite heavy, combined with the weight of the protective box, they need to be hoisted onto the support frame using a crane. Once placed on the support frame, it is difficult to move or adjust them manually. The position of the anchor plates determines the position of the T-bolts, thus requiring a high degree of precision in their placement. This necessitates extreme care during operation, sometimes requiring multiple hoisting adjustments to the anchor plate's position, making the process very inconvenient and impacting construction efficiency. Utility Model Content

[0007] The purpose of this utility model is to provide a pre-embedded structural frame for a test platform to solve the problem in the prior art that the placement of anchor plates needs to be adjusted multiple times to ensure placement accuracy when placing anchor plates on the support frame, which leads to inconvenience in operation and affects construction efficiency; the purpose of this utility model is also to provide a foundation for a test platform to solve the above problems.

[0008] To achieve the above objectives, the pre-embedded structural frame of the test platform in this utility model adopts the following technical solution: An embedded structural frame for a test platform includes a support frame and anchor plates welded and fixed to the support frame. The support frame includes multiple vertically fixed longitudinal beams and transverse beams. The anchor plates are supported on at least two longitudinal beams or two transverse beams. Fixing plates corresponding to the four sides of the anchor plate, respectively, are fixed on the transverse beams and / or longitudinal beams on the outer side of the anchor plates. Each fixing plate is threaded with a tightening screw. The tightening screws on each fixing plate are used to push the anchor plates from the four directions (front, back, left, and right) to accurately position the anchor plates during the process of placing the anchor plates on the support frame.

[0009] The beneficial effects of the above technical solution are as follows: This utility model is an improved invention, which further defines the structure of the support frame. The support frame includes multiple vertically fixed longitudinal beams and transverse beams. The anchor plate is supported on at least two longitudinal beams or two transverse beams. Fixing plates corresponding to the four sides of the anchor plate are fixed on the transverse beams and / or longitudinal beams on the outside of the anchor plate. Each fixing plate is threaded with a tightening screw. The tightening screw on each fixing plate is used to push the anchor plate from the four directions (front, back, left, and right) to accurately position the anchor plate during the process of placing the anchor plate on the support frame. In this way, the placement position of the anchor plate can be adjusted by tightening the screw, making the operation more convenient and improving the construction efficiency.

[0010] Furthermore, the anchor plate is supported on a U-shaped structure formed by two crossbeams and one longitudinal beam, or by two longitudinal beams and one crossbeam. The two parallel beams in the U-shaped structure are fixed with fixing plates corresponding to one of the opposite sides of the anchor plate, and also with fixing plates corresponding to one of the opposite sides of the other set of the anchor plate.

[0011] Furthermore, the crossbeams are defined to extend in the left-right direction, and the longitudinal beams extend in the front-back direction. The U-shaped structure includes two crossbeams and one longitudinal beam. The fixing plates on the two crossbeams of the U-shaped structure that correspond to the front and rear sides of the anchor plate are the front fixing plate and the rear fixing plate, respectively, and the fixing plate that corresponds to the right side of the anchor plate is the right fixing plate. There is one right fixing plate on each of the two crossbeams of the U-shaped structure. There is also one fixing plate on the longitudinal beam of the U-shaped structure, which is the left fixing plate that corresponds to the left side of the anchor plate. The left fixing plate corresponds to the middle of the interval between the two right fixing plates.

[0012] Furthermore, the right fixing plate is fixed to the top surface of the corresponding crossbeam, the front fixing plate and the rear fixing plate are fixed to the sides of the corresponding crossbeam respectively, and the left fixing plate is fixed to the side of the corresponding longitudinal beam.

[0013] Furthermore, in the U-shaped structure, each of the two parallel beams has a fixing plate corresponding to one of the two opposing sides of the anchor plate, and each plate corresponds to the middle position of the opposing sides.

[0014] Furthermore, the fixing plate includes a plate body and a nut welded to the upper end of the plate body, the inner hole of the nut forming a mounting hole for installing a tightening screw.

[0015] Furthermore, the support frame includes a top frame and multiple legs fixed to the top frame. The top frame includes the aforementioned longitudinal beams and transverse beams, and each leg has a base plate fixed to its bottom for fixed connection with the bottom wall of the foundation pit.

[0016] Furthermore, the support frame includes a top frame and multiple legs fixed to the top frame. The top frame includes the aforementioned longitudinal beams and transverse beams, and a connecting beam is fixedly connected between two adjacent legs.

[0017] Furthermore, threaded holes with axes extending vertically are machined at the four corners of the anchor plate, and leveling bolts for supporting the support frame and leveling the anchor plate are installed in each threaded hole.

[0018] To achieve the above objectives, the experimental platform foundation of this utility model adopts the following technical solution: A test platform foundation includes a concrete foundation and an embedded structural frame embedded in the concrete foundation. The embedded structural frame includes a support frame and anchor plates welded and fixed to the support frame. The support frame includes multiple vertically fixed longitudinal beams and transverse beams. The anchor plates are supported on at least two longitudinal beams or two transverse beams. Fixing plates corresponding to the four sides of the anchor plates, respectively, are fixed on the transverse beams and / or longitudinal beams on the outer side of the anchor plates. Each fixing plate is threaded with a tightening screw. The tightening screws on each fixing plate are used to push the anchor plates from the four directions (front, back, left, and right) to accurately position the anchor plates during the process of placing the anchor plates on the support frame.

[0019] The beneficial effects of the above technical solution are as follows: This utility model is an improved invention, which further defines the pre-embedded structural frame. The support frame of the pre-embedded structural frame includes multiple vertically fixed longitudinal beams and transverse beams. The anchor plate is supported on at least two longitudinal beams or two transverse beams. Fixing plates corresponding to the four sides of the anchor plate are fixed on the transverse beams and / or longitudinal beams on the outside of the anchor plate. Each fixing plate is threaded with a tightening screw. The tightening screw on each fixing plate is used to push the anchor plate from the four directions (front, back, left, and right) to accurately position the anchor plate during the process of placing the anchor plate on the support frame. In this way, the placement position of the anchor plate can be adjusted by tightening the screw, which makes the operation more convenient and can improve the construction efficiency.

[0020] Furthermore, the anchor plate is supported on a U-shaped structure formed by two crossbeams and one longitudinal beam, or by two longitudinal beams and one crossbeam. The two parallel beams in the U-shaped structure are fixed with fixing plates corresponding to one of the opposite sides of the anchor plate, and also with fixing plates corresponding to one of the opposite sides of the other set of the anchor plate.

[0021] Furthermore, the crossbeams are defined to extend in the left-right direction, and the longitudinal beams extend in the front-back direction. The U-shaped structure includes two crossbeams and one longitudinal beam. The fixing plates on the two crossbeams of the U-shaped structure that correspond to the front and rear sides of the anchor plate are the front fixing plate and the rear fixing plate, respectively, and the fixing plate that corresponds to the right side of the anchor plate is the right fixing plate. There is one right fixing plate on each of the two crossbeams of the U-shaped structure. There is also one fixing plate on the longitudinal beam of the U-shaped structure, which is the left fixing plate that corresponds to the left side of the anchor plate. The left fixing plate corresponds to the middle of the interval between the two right fixing plates.

[0022] Furthermore, the right fixing plate is fixed to the top surface of the corresponding crossbeam, the front fixing plate and the rear fixing plate are fixed to the sides of the corresponding crossbeam respectively, and the left fixing plate is fixed to the side of the corresponding longitudinal beam.

[0023] Furthermore, in the U-shaped structure, each of the two parallel beams has a fixing plate corresponding to one of the two opposing sides of the anchor plate, and each plate corresponds to the middle position of the opposing sides.

[0024] Furthermore, the fixing plate includes a plate body and a nut welded to the upper end of the plate body, the inner hole of the nut forming a mounting hole for installing a tightening screw.

[0025] Furthermore, the support frame includes a top frame and multiple legs fixed to the top frame. The top frame includes the aforementioned longitudinal beams and transverse beams, and each leg has a base plate fixed to its bottom for fixed connection with the bottom wall of the foundation pit.

[0026] Furthermore, the support frame includes a top frame and multiple legs fixed to the top frame. The top frame includes the aforementioned longitudinal beams and transverse beams, and a connecting beam is fixedly connected between two adjacent legs.

[0027] Furthermore, threaded holes with axes extending vertically are machined at the four corners of the anchor plate, and leveling bolts for supporting the support frame and leveling the anchor plate are installed in each threaded hole. Attached Figure Description

[0028] Figure 1 This is a partial structural diagram of the basic implementation of the experimental platform in this utility model; Figure 2 This is a perspective view of the pre-embedded structural frame in the basic embodiment of the test platform of this utility model; Figure 3 for Figure 2 A magnified view of a portion of the image; Figure 4 This is a perspective view of the support frame of the pre-embedded structural frame in the basic embodiment of the test platform of this utility model; Figure 5 for Figure 4 A magnified view of a portion of the image; Figure 6 This is a three-dimensional view (partially cut open) of the anchor plate and protective box of the pre-embedded structural frame in the basic embodiment of the test platform of this utility model. Figure 7 This is a top view of the anchor plate and protective box of the pre-embedded structural frame in the basic embodiment of the test platform of this utility model; Figure 8 for Figure 7 Sectional view along line AA in the middle; Figure 9 This is a perspective view of the sleeve of the pre-embedded structural frame in the basic embodiment of the test platform of this utility model; Figure 10 This is a perspective view of the T-bolt in the basic embodiment of the test platform of this utility model.

[0029] In the diagram: 1. Base plate; 2. Support frame; 21. Top frame; 211. Side crossbeam; 212. Side longitudinal beam; 213. Middle crossbeam; 214. Middle longitudinal beam; 215. Front fixing plate; 216. Rear fixing plate; 217. Right fixing plate; 218. Left fixing plate; 22. Support leg; 23. Connecting frame; 24. Connecting beam; 3. Anchor plate; 31. Rectangular hole; 311. Long hole wall; 312. Short hole wall; 32. Adjustment hole; 33. Fixing hole; 34. Anti-torsion block; 4. Protective box; 41. Box bottom; 5. 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

[0030] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0031] 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.

[0032] Pre-embedded structural frame, such as Figure 2 As shown, it includes a base plate 1, a support frame 2, an anchor plate 3, a protective box 4, a sleeve 5, and an upper surface base plate 6. Combined with... Figure 3 , Figure 4 and Figure 5 As shown, the support frame 2 includes a top frame 21 and multiple legs 22 fixed to the top frame 21. Each leg 22 has a base plate 1 welded to its bottom. The base plate 1 has through holes at its four corners for fixing to the bottom wall of the pit using expansion bolts or chemical bolts. In other embodiments, a base plate may not be provided, and the pre-embedded structural frame may be placed directly on the bottom wall of the pit.

[0033] The top frame 21 is a rectangular frame structure, comprising multiple vertically fixed longitudinal and transverse beams, including two side transverse beams 211 and two side longitudinal beams 212. These four beams are welded and fixed to form the outer frame of the top frame 21. The inner longitudinal beams of the outer frame are central longitudinal beams 214, and the inner transverse beams are central transverse beams 213. Multiple central longitudinal beams 214 are arranged in parallel, and multiple central transverse beams 213 are fixed between adjacent central longitudinal beams 214, thus forming multiple grids. In other embodiments, the inner central transverse beams 213 of the outer frame may have multiple parallel arranged beams, and multiple central longitudinal beams 214 are fixed between adjacent central transverse beams 213.

[0034] Anchor plate 3 is supported on at least two longitudinal beams or two transverse beams, and anchor plate 3 is welded and fixed to the top surface of top frame 21. Fixing plates corresponding to the four sides (front, back, left, and right) of anchor plate 3 are fixed to the transverse beams and / or longitudinal beams on the outer side of anchor plate 3. Each fixing plate is threaded with a tightening screw (not shown in the figure). The tightening screws on each fixing plate are used to push anchor plate 3 from the four directions (front, back, left, and right) during the placement of anchor plate 3 on support frame 2 to accurately position anchor plate 3. This allows for adjustment of the anchor plate 3's placement position via the tightening screws, making operation more convenient and improving construction efficiency.

[0035] Specifically, in this embodiment, each anchor plate 3 is supported on a U-shaped structure formed by two crossbeams and one longitudinal beam (in other embodiments, it may also be supported on a U-shaped structure formed by two longitudinal beams and one crossbeam). Figure 3 Taking the anchor plate 3 at the middle corner as an example, combined with Figure 5 As shown, it is supported on a U-shaped structure formed by side beams 211, middle beams 213, and side longitudinal beams 212. In this U-shaped structure, the side beams 211 and the middle beams 213 are two parallel beams. Fixed plates corresponding to one set of opposite sides of the anchor plate 3 are fixed on both parallel beams, as well as a fixed plate corresponding to one side of the other set of opposite sides of the anchor plate 3.

[0036] Specifically, defining all crossbeams as extending in the left-right direction and all longitudinal beams as extending in the front-back direction, for the U-shaped structure supporting the corner anchor plate 3, the fixing plate on the middle crossbeam 213 is the front fixing plate 215 corresponding to the front side of the anchor plate 3, and the fixing plate on the side crossbeam 211 is the rear fixing plate 216 corresponding to the rear side of the anchor plate 3. In this embodiment, only one front fixing plate 215 and one rear fixing plate 216 are provided, and they are aligned front to back, corresponding to the middle positions of the front and rear sides of the anchor plate 3, respectively. That is, there is only one tightening screw for pushing the front and rear sides of the anchor plate 3, which pushes the middle positions of the front and rear sides of the anchor plate 3, respectively. In other embodiments, two front fixing plates 215 and two rear fixing plates 216 can also be provided, arranged left and right at intervals, so that there are two tightening screws for pushing the front and rear sides of the anchor plate 3.

[0037] For the U-shaped structure supporting the corner anchor plate 3, right fixing plates 217 corresponding to the right side of the anchor plate 3 are fixed on the middle crossbeam 213 and the side crossbeam 211, respectively, while left fixing plates 218 corresponding to the left side of the anchor plate 3 are fixed on the side longitudinal beam 212. In this embodiment, only one left fixing plate 218 is provided, and it corresponds to the middle of the interval between the two right fixing plates 217. That is, there is only one tightening screw for pushing the left side of the anchor plate 3, which is used to push the middle position of the left side. There are two tightening screws for pushing the right side of the anchor plate 3, which are arranged in an isosceles triangle with the tightening screws for pushing the left side.

[0038] In other embodiments, two left fixing plates 218 may also be provided, facing each other to the left and right of the two right fixing plates 217. In other embodiments, if the anchor plate 3 is supported on a U-shaped structure formed by two longitudinal beams and one transverse beam, for example, if the corner anchor plate 3 is supported on a U-shaped structure formed by the side longitudinal beam 212, the middle longitudinal beam 214 and the side transverse beam 211, then the side longitudinal beam 212 in the U-shaped structure is fixed with both a left fixing plate (there may be only one left fixing plate, corresponding to the middle position of the left side of the anchor plate) and a front fixing plate (only one is provided), the middle longitudinal beam 214 is fixed with both a right fixing plate (there may be only one right fixing plate, corresponding to the middle position of the right side of the anchor plate) and a front fixing plate (only one is provided), and the side transverse beam 211 is fixed with only a rear fixing plate (only one is provided).

[0039] In other embodiments, the anchor plate 3 can also be supported on a frame structure formed by two crossbeams and two longitudinal beams. In this case, fixing plates corresponding to the four sides (front, back, left, and right) of the anchor plate 3 are fixed on the crossbeams and longitudinal beams on the outer side of the anchor plate 3. Taking the corner anchor plate 3 as an example, it is supported on a frame structure formed by the side longitudinal beam 212, the middle longitudinal beam 214, the middle crossbeam 213, and the side crossbeam 211. In this case, a left fixing plate is fixed on the side longitudinal beam 212, a right fixing plate is fixed on the middle longitudinal beam 214, a front fixing plate is fixed on the middle crossbeam 213, and a rear fixing plate is fixed on the side crossbeam 211.

[0040] In other embodiments, the anchor plate 3 may also be supported on only two crossbeams. Taking the corner anchor plate 3 as an example, it is supported on the middle crossbeam 213 and the side crossbeam 211. At this time, the front fixing plate, the left fixing plate and the right fixing plate are fixed on the middle crossbeam 213 respectively, and the rear fixing plate, the left fixing plate and the right fixing plate are fixed on the side crossbeam 211 respectively.

[0041] In other embodiments, the anchor plate 3 may also be supported on only two longitudinal beams. Taking the corner anchor plate 3 as an example, it is supported on the side longitudinal beam 212 and the middle longitudinal beam 214. At this time, the left fixing plate, the front fixing plate and the rear fixing plate are fixed on the side longitudinal beam 212 respectively, and the right fixing plate, the front fixing plate and the rear fixing plate are fixed on the middle longitudinal beam 214 respectively.

[0042] In this embodiment, as Figure 5 As shown, the two right fixing plates 217 are respectively fixed to the top surfaces of the middle crossbeam 213 and the side crossbeam 211, so that there is sufficient distance between the two right fixing plates 217 to facilitate the adjustment of the position of the anchor plate 3. In other embodiments, the two right fixing plates 217 can also be fixed to the opposite sides of the middle crossbeam 213 and the side crossbeam 211 respectively.

[0043] In this embodiment, the front fixing plate 215 is fixed to the side of the middle crossbeam 213, on the side away from the anchor plate 3 (in other embodiments, it can also be fixed to the top surface of the middle crossbeam 213 without affecting the installation of the anchor plate 3); the left fixing plate 218 is fixed to the side of the side longitudinal beam 212, on the side away from the anchor plate 3 (in other embodiments, it can also be fixed to the top surface of the side longitudinal beam 212 without affecting the installation of the anchor plate 3); the rear fixing plate 216 is fixed to the side of the side crossbeam 211, on the side away from the anchor plate 3 (in other embodiments, it can also be fixed to the top surface of the side crossbeam 211 without affecting the installation of the anchor plate 3).

[0044] In this embodiment, each fixing plate includes a plate body and a nut welded to the upper end of the plate body. The inner hole of the nut forms a mounting hole for installing a tightening screw. In other embodiments, the fixing plate may only include a plate body, on which threaded holes are directly machined for installing tightening screws.

[0045] In addition, such as Figure 4 As shown, the top frame 21 has two ends extending from the side support legs 22 along its length, and a connecting frame 23 is fixed between the top frame 21 and the side support legs 22 to ensure that the top frame 21 has sufficient length and to ensure the overall structural strength of the support frame 2. In other embodiments, the two ends of the top frame 21 along its length can be aligned with the side support legs 22.

[0046] In addition, a connecting beam 24 is fixedly connected between two adjacent support legs 22 to improve the overall structural strength of the support frame 2. In other embodiments, the connecting beam 24 may be omitted.

[0047] When placing the anchor plate 3 onto the support frame 2, use a crane to hoist the anchor plate 3 to the corresponding position above the support frame 2. With the anchor plate 3 0.5cm above the top surface of the support frame 2, use the front, back, left, and right tightening screws to push the four sides of the anchor plate 3 to adjust its position. Then, place the anchor plate 3 firmly onto the support frame 2 (the tightening screws around the perimeter are only against the sides of the anchor plate 3, not fully engaged, and the anchor plate 3 is heavy, so it can be lowered onto the support frame 2 by gravity). After placement, tighten the tightening screws around the perimeter to secure the anchor plate 3 in place, facilitating subsequent welding.

[0048] Of course, you can also first place the anchor plate 3 on the support frame 2, and then adjust its position by tightening the screws around it, and fix the position of the anchor plate 3.

[0049] During welding, the bottom edge of the anchor plate 3 can be directly welded to the top surface of the support frame 2, or it can be indirectly welded using angle steel. The horizontal edge of the angle steel is welded to the top surface of the support frame 2, and the vertical edge is welded to the side of the anchor plate 3.

[0050] like Figure 2 and Figure 3 As shown, the protective box 4 is fixed on the bottom surface of the anchor plate 3, and the sleeve 5 is fixed on the top surface of the anchor plate 3. The sleeve 5, the anchor plate 3, and the protective box 4 are used to protect the T-bolt 7 and prevent the T-bolt 7 from rotating when the testing equipment is installed, thus resisting the torque.

[0051] Specifically, such as Figure 6 and Figure 7 As shown, the anchor plate 3 is provided with a head 71 for the T-bolt 7. Figure 10 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.

[0052] 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.

[0053] 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.

[0054] Along the length of the rectangular hole 31, guide plates 10 are fixed to the edges of the two anti-torsion blocks 34 on their adjacent sides. 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.

[0055] The guide section 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 7 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.

[0056] 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.

[0057] 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.

[0058] Furthermore, combined Figure 8As 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.

[0059] 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.

[0060] 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.

[0061] 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 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 base plate 1. Next, the support frame 2 with the base plate 1 is placed into the pit, leveled, and then secured to the base plate 1 using expansion bolts or chemical bolts. Then, the anchor plate 3 and protective box 4, welded together and containing the guide plate 10, are placed onto the top frame 21 of the support frame 2. During placement, the anchor plate 3 is pushed from four directions (front, back, left, and right) using the tightening screws around its perimeter to accurately position it.

[0062] Combination Figure 3 , Figure 5 and Figure 6 As shown, the protective box 4 enters the top frame 21. Adjustment holes 32, extending vertically along their axes, are machined at the four corners of the anchor plate 3. These adjustment holes 32 are threaded holes, and leveling bolts (not shown in the figure) are installed inside them. The bottom of the leveling bolts can protrude from the bottom surface of the anchor plate 3 and rest against the top surface of the top frame 21. By controlling the extension length of the four leveling bolts, the levelness of the anchor plate 3 can be adjusted. In other embodiments, leveling bolts may not be installed. In this case, it is unnecessary to machine the adjustment holes 32; instead, the levelness of the anchor plate 3 is ensured through machining and installation precision.

[0063] After the anchor plate 3 is adjusted, it is welded to the top frame 21 for reinforcement. Then, the sleeve 5 is hoisted above the anchor plate 3, as shown. Figure 9 As shown, the 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 sleeve 5, and the horizontal side extends out 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 6 and Figure 7 As 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 sleeve 5 to the top surface of the anchor plate 3. The rectangular inner hole of the 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 sleeve 5 and the anchor plate 3 in sequence to enter the protective box 4.

[0064] 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 sleeve 5. The upper end face of the sleeve 5 does not protrude from the upper end face 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.

[0065] Then, the head 71 of the T-bolt 7 is passed downwards through the sleeve 5 and 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 engaged 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.

[0066] like Figure 10 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.

[0067] 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 support 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.

[0068] 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.

[0069] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A pre-embedded structural frame for a test platform, comprising a support frame and an anchor plate welded and fixed to the support frame, characterized in that, The support frame includes multiple vertically fixed longitudinal beams and transverse beams. The anchor plate is supported on at least two longitudinal beams or two transverse beams. The transverse beams and / or longitudinal beams on the outside of the anchor plate are fixed with fixing plates corresponding to the four sides of the anchor plate, namely the front, back, left, and right sides. Each fixing plate is threaded with a tightening screw. The tightening screw on each fixing plate is used to push the anchor plate from the front, back, left, and right directions during the process of placing the anchor plate on the support frame to accurately position the anchor plate.

2. The pre-embedded structural frame of the test platform according to claim 1, characterized in that, The anchor plate is supported on a U-shaped structure formed by two horizontal beams and one vertical beam, or by two vertical beams and one horizontal beam. The two parallel beams in the U-shaped structure are fixed with fixing plates corresponding to one of the opposite sides of the anchor plate, and also with fixing plates corresponding to one of the opposite sides of the other set of the anchor plate.

3. The pre-embedded structural frame of the test platform according to claim 2, characterized in that, Define the crossbeams as extending in the left-right direction and the longitudinal beams as extending in the front-back direction. The U-shaped structure includes two crossbeams and one longitudinal beam. The fixing plates on the two crossbeams of the U-shaped structure that correspond to the front and rear sides of the anchor plate are the front fixing plate and the rear fixing plate, respectively. The fixing plate that corresponds to the right side of the anchor plate is the right fixing plate. There is one right fixing plate on each of the two crossbeams of the U-shaped structure. There is also one fixing plate on the longitudinal beam of the U-shaped structure, which is the left fixing plate that corresponds to the left side of the anchor plate. The left fixing plate corresponds to the middle of the interval between the two right fixing plates.

4. The pre-embedded structural frame of the test platform according to claim 3, characterized in that, The right fixing plate is fixed to the top surface of the corresponding crossbeam, the front fixing plate and the rear fixing plate are fixed to the sides of the corresponding crossbeam respectively, and the left fixing plate is fixed to the side of the corresponding longitudinal beam.

5. The pre-embedded structural frame of the test platform according to claim 2, characterized in that, In the U-shaped structure, there is a fixing plate on each of the two parallel beams, corresponding to one of the two opposite sides of the anchor plate, and the fixing plate is located at the middle of the opposite side.

6. The pre-embedded structural frame of the test platform according to any one of claims 1 to 5, characterized in that, The fixing plate includes a plate body and a nut welded to the upper end of the plate body. The inner hole of the nut forms a mounting hole for installing a tightening screw.

7. The pre-embedded structural frame of the test platform according to any one of claims 1 to 5, characterized in that, The support frame includes a top frame and multiple legs fixed to the top frame. The top frame includes the aforementioned longitudinal beams and transverse beams. Each leg has a base plate fixed to its bottom for fixed connection with the bottom wall of the foundation pit.

8. The pre-embedded structural frame of the test platform according to any one of claims 1 to 5, characterized in that, The support frame includes a top frame and multiple legs fixed to the top frame. The top frame includes the aforementioned longitudinal beams and transverse beams, and a connecting beam is fixedly connected between two adjacent legs.

9. The pre-embedded structural frame of the test platform according to any one of claims 1 to 5, characterized in that, The anchor plate has threaded holes with the axis extending in the vertical direction at each of its four corners. Each threaded hole is equipped with a leveling bolt for supporting the support frame and leveling the anchor plate.

10. A test platform foundation, comprising a concrete foundation and an embedded structural frame embedded in the concrete foundation, characterized in that, The embedded structural frame is the test platform embedded structural frame as described in any one of claims 1 to 9.

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