Accident oil pool structure test loading device

Abstract

The invention relates to an accident oil pool structure test loading device, and belongs to the technical field of substation safety facilities. Comprising a base unit; the supporting frame is movably arranged on the base unit, and a test cavity for accommodating an accident oil pool is formed in the middle of the supporting frame; and the multiple loading units are distributed on the supporting frame, and the multiple loading units are used for applying loads to the accident oil pool in the circumferential direction and the axial direction. When the emergency oil pool stress test device is used, multidirectional loading tests on the emergency oil pool can be realized, so that the reliability of the emergency oil pool stress test is ensured, and a guarantee is provided for use safety.

Description

Technical Field

[0001] The present application relates to the technical field of substation safety facilities, and in particular to an accident oil pool structure test loading device. Background Art

[0002] The substation accident oil pool is an important facility for collecting and storing transformer oil to prevent oil leakage and fire caused by damage to oil-filled electrical equipment such as the main transformer. Circular cross-section reinforced concrete structures are often used to construct accident oil pools due to their good mechanical properties and bearing capacity.

[0003] However, during the operation of the substation, the accident oil pool may be subjected to various loads, including oil pressure, temperature stress, seismic load, etc. As an important facility for dealing with these accidents, the structure of the accident oil pool must be able to withstand these sudden loads.

[0004] Therefore, it is particularly important to conduct mechanical property testing and bearing capacity testing on the accident oil pool, which can timely discover and solve the safety hazards in the structure and ensure that the oil pool can remain stable when subjected to various loads. Traditional mechanical property testing and bearing capacity testing mainly use a single hydraulic loading device. The hydraulic jack can only provide point loads or strip line loads in one direction, which is difficult to simulate the actual cylindrical structure subjected to annular surface loads and axial force loads, ultimately affecting the validity of the test results. Summary of the invention

[0005] The embodiment of the present application provides an accident oil pool structure test loading device to solve the defect in the related technology that the traditional load loading test can only provide point load or strip line load in one direction and cannot meet the actual cylindrical structure subjected to annular surface load and axial force load.

[0006] An embodiment of the present application provides an accident oil pool structure test loading device, comprising: a base unit; a support frame, which is movably arranged on the base unit, and a test cavity for accommodating the accident oil pool is formed in the middle of the support frame; loading units, which are distributed on the support frame and are arranged in plurality, and the plurality of loading units are used to apply loads to the accident oil pool in the circumferential direction and axial direction.

[0007] By adopting the above technical solution: the base unit can be used as the basic support structure of the entire loading device, ensuring the stability and reliability of the device, and the support frame is moved on the base unit to realize loading tests at different positions and adjustment of the position of the support frame. The loading unit can simulate the circumferential and axial loads on the oil pool, which helps to more comprehensively evaluate the load-bearing capacity and structural safety of the oil pool, and provide a scientific basis for improving safety.

[0008] In some embodiments, the base unit includes: a fixed base disposed on opposite sides of the accident oil pool; a sliding base movably connected to the fixed base, and the support frame is mounted on the sliding base.

[0009] By adopting the above technical solutions: the structural strength and stability of the fixed base can withstand large loads, and the design of the sliding base is flexible, allowing the position of the support frame to be adjusted according to actual needs, so as to adapt to the installation of the accident oil pool and provide more operating space for the staff.

[0010] In some embodiments, the loading unit includes a horizontal cross beam, and the horizontal cross beam is provided on the top of the support frame and around the side perimeter of the support frame; a guide rail base disposed on the horizontal cross beam; a jacking device movably connected to the guide rail base, and the output end of the jacking device faces the accident oil pool.

[0011] By adopting the above technical solutions: by disposing the guide rail base on the horizontal cross beam, a reliable moving track is provided for the jacking device, enabling the jacking device to be flexibly adjusted in the horizontal direction to adapt to accident oil pools of different sizes or different operation requirements.

[0012] In some embodiments, the loading unit further includes: a horizontal load transfer assembly, one side of which is connected to the jacking device on the side perimeter of the support frame, and the other side is in contact with the outer wall of the accident oil pool; an axial load transmission assembly, one side of which is connected to the hydraulic jack on the top of the support frame, and the other side is in contact with the top wall of the accident oil pool.

[0013] By adopting the above technical solutions: using the horizontal load transfer assembly and the axial load transmission assembly can accurately transfer the load of the jacking device to the accident oil pool, avoiding the situation of single-point force transmission of the jacking device causing damage to the accident oil pool, so as to reliably evaluate the stability and bearing capacity of the accident oil pool structure under the action of the load.

[0014] In some embodiments, the horizontal load transfer assembly includes: a plurality of arc plates, and a fitting surface for fitting with the side wall of the accident oil pool is provided on the plurality of arc plates; a reinforcing rod, one side of which is connected to the arc plate, and the other side is provided with a connection to the jacking device.

[0015] By adopting the above technical solutions: by applying pressure to the reinforcing rod by the jacking device, the pressure on the reinforcing rod is further transmitted to the arc plate and then to the structure of the accident oil pool. Under the action of the reinforcing rod and the arc plate, it is ensured that the force on the outer wall of one side of the accident oil pool is balanced and stable, avoiding the occurrence of force point contact, so as to prevent the accident oil pool from being directly damaged due to stress concentration and affecting the test measurement results.

[0016] In some embodiments, the axial load transmission assembly includes: a transfer plate connected to the jacking device at the top of the support frame; a plurality of load-bearing columns provided and distributed at the bottom of the transfer plate; and a contact plate, one side of which is connected to the plurality of load-bearing columns and the other side of which is provided with a fitting surface that fits against the top of the accident oil pool.

[0017] By adopting the above technical solution: it is output downward through the jacking device at the top of the support frame, then evenly transmitted to the contact plate through the transfer plate and the load-bearing columns, and finally the top of the accident oil pool bears the force to test the axial force-bearing capacity of the accident oil pool.

[0018] In some embodiments, the output end of the jacking device is provided with a spherical curved surface section, and both the horizontal load transfer assembly and the axial load transmission assembly are provided with grooves adapted to the spherical curved surface section.

[0019] By adopting the above technical solution: the spherical curved surface section and the groove cooperate to allow the output end of the jacking device to freely adjust the acting force direction and acting position within a certain range to adapt to uneven or uneven contact surfaces and ensure uniform distribution of the load.

[0020] In some embodiments, the bottom of the jacking device is provided with an interface, the interface is movably connected to the guide rail base, and the interface is further provided with a bolt, and the bolt is cooperatively connected to the guide rail base.

[0021] By adopting the above technical solution: the jacking device can be movably connected to the guide rail base through the interface. The designed bolt not only plays a fixing role but also allows the height of the jacking device to be adjusted by rotation. By rotating the bolt, the relative position between the interface and the guide rail base is changed, thereby realizing the lifting of the jacking device; and when the horizontal position of the jacking device needs to be adjusted, the interface can also be pushed to slide along the guide rail base by rotating the bolt until the required position is reached, effectively realizing the precise positioning of the jacking device and meeting the test requirements.

[0022] In some embodiments, a displacement sensor is provided on the jacking device.

[0023] By adopting the above technical solution: the displacement sensor can real-time monitor the jacking device, and after being enabled, monitor the displacement changes on the horizontal load transfer assembly and the axial load transmission assembly to adjust the applied load level.

[0024] In some embodiments, an image monitoring device is further provided on one side of the support frame, and the image monitoring device is used to observe the structure of the accident oil pool.

[0025] By adopting the above technical solution: the image monitoring device can observe and record the deformation and failure characteristics of the structure during the entire loading process to ensure precise control of the test.

[0026] The beneficial effects brought by the technical solution provided in this application include:

[0027] An accident oil pool structure test loading device is provided in an embodiment of this application. With the base unit set as the foundation, a support frame is installed on the base unit, and the support frame is movable, so that the position of the support frame is adjustable to adapt to the installation of the accident oil pool, thereby effectively placing the accident oil pool in the test cavity. Then, the loading unit is used to apply loads to the circumferential direction and axial direction of the accident oil pool. The load loading in multiple directions can effectively meet the test requirements, and the overall operation is convenient and reliable. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of this application, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic diagram of the overall structure provided in an embodiment of this application;

[0030] Figure 2 It is a top view schematic diagram provided in an embodiment of this application;

[0031] Figure 3 It is a side view schematic diagram provided in an embodiment of this application;

[0032] Figure 4 It is a partial schematic diagram provided in an embodiment of this application;

[0033] Reference Signs:

[0034] 1. Support Frame; 2. Test Cavity; 30. Fixed Base; 31. Sliding Base; 32. Anchor Bolt; 40. Horizontal Cross Beam; 41. Guide Rail Base; 42. Jacking Device; 420. Displacement Sensor; 421. Hydraulic Pump; 43. Spherical Curved Section; 50. Arc Plate; 51. Reinforcing Bar; 60. Transfer Plate; 61. Bearing Column; 62. Contact Plate; 7. Groove; 8. Interface; 80. Bolt; 90. Image Monitoring Device; 91. Central Control System. Detailed Embodiments

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0036] The embodiment of this application provides a test loading device for an accident oil pool structure, which can solve the defect that the traditional load loading test can only provide point load or strip line load unidirectionally and cannot meet the actual circumferential surface load and axial force load of a cylindrical structure.

[0037] See Figures 1 to 4 As shown, the embodiment of this application provides a test loading device for an accident oil pool structure, including a base unit, a support frame 1, and a loading unit. Among them, the base unit is arranged outside the accident oil pool, the support frame 1 is movably arranged on the base unit, and the support frame 1 includes, but is not limited to, two rectangular frames and four columns connected between the two rectangular frames. The rectangular frame and the columns are connected by high-strength bolts (not shown in the figure). Between the four columns, that is, a test cavity 2 for accommodating the accident oil pool is formed in the middle of the support frame 1. The loading units are distributed on the support frame 1 and are provided in multiple numbers. The multiple loading units are used to apply loads to the circumferential direction and the axial direction of the accident oil pool.

[0038] During use, the base unit is arranged outside the accident oil pool. It serves as the basic support structure of the entire loading device, ensuring the stability and reliability of the device. And the design of the base unit allows the support frame 1 to move on it, which provides flexibility for realizing loading tests at different positions and adjusting the position of the support frame 1. The support frame 1 is composed of two rectangular frames and four columns. This structural design not only ensures sufficient strength and stiffness but also facilitates assembly and adjustment. The loading units are distributed on the support frame 1 and are provided in multiple numbers, which ensures that loads can be applied to the accident oil pool from multiple directions and angles. That is, through the loading units, various load conditions that the oil pool may be subjected to in an actual accident can be simulated, including circumferential and axial loads. This helps to more comprehensively evaluate the bearing capacity and structural safety of the oil pool and provides a scientific basis for improving safety. In addition, the mobility and adjustability of the support frame 1 enable it to adapt to different types of oil pools and different scales of test requirements, with high versatility and practicality.

[0039] In this application, the base unit includes a fixed base 30 and a sliding base 31. The fixed base 30 is arranged on opposite sides of the accident oil pool and is made of two high-strength structural steels and fixed by anchor bolts 32. At least two sliding bases 31 are provided on each side of the fixed base 30 and are movably connected to the fixed base 30. The support frame 1 is installed on the sliding base 31. The fixed base 30 has excellent structural strength and stability and can bear large loads, including possible accident impacts or additional pressures during oil pool leakage. The sliding base 31 is designed flexibly, allowing the position of the support frame 1 to be adjusted according to actual needs, so as to adapt to the installation of the accident oil pool and provide more operating space for the staff.

[0040] In this application, the provided loading unit includes a horizontal crossbeam 40, a guide rail base 41, and a jacking device 42. Horizontal crossbeams 40 are provided on the top of the support frame 1 and around the side perimeter of the support frame 1. The guide rail base 41 is arranged on the horizontal crossbeam 40. The jacking device 42 is movably connected to the guide rail base 41, and the output end of the jacking device 42 faces the accident oil pool. The jacking device 42 is set to include, but is not limited to, a hydraulic jack. In other embodiments, devices such as an oil cylinder can also be provided. By arranging the guide rail base 41 on the horizontal crossbeam 40, a reliable moving track is provided for the jacking device 42, enabling the jacking device 42 to be flexibly adjusted in the horizontal direction to adapt to accident oil pools of different sizes or different operation requirements. At the same time, the stability of the guide rail base 41 also ensures the smoothness and accuracy of the jacking device 42 during movement. At the start of the test, the jacking device 42 performs jacking loading on the accident oil pool to test the force-bearing capacity of the accident oil pool and timely discover and solve potential safety hazards in the structure.

[0041] In this application, in order to facilitate the movement of the jacking device 42, an interface 8 is provided at the bottom of the jacking device 42. The interface 8 is movably connected to the guide rail base 41, and the interface 8 is also provided with a bolt 80, and the bolt 80 is cooperatively connected to the guide rail base 41. The jacking device 42 can be movably connected to the guide rail base 41 through the interface 8. The designed bolt 80 not only plays a fixing role but also allows the height of the jacking device 42 to be adjusted by rotation. By rotating the bolt 80, the relative position between the interface 8 and the guide rail base 41 is changed, thereby realizing the lifting and lowering of the jacking device 42. Also, when the horizontal position of the jacking device 42 needs to be adjusted, the interface 8 can also be pushed to slide along the guide rail base 41 by rotating the bolt 80 until the desired position is reached, effectively realizing the precise positioning of the jacking device 42 to meet the test requirements.

[0042] In this application, the provided loading unit further includes a horizontal load transfer component and an axial load transmission component. One side of the horizontal load transfer component is connected to the jacking device 42 on the side enclosure of the support frame 1, and the other side is in contact with the outer wall of the accident oil pool. One side of the axial load transmission component is connected to the hydraulic jack at the top of the support frame 1, and the other side is in contact with the top wall of the accident oil pool. The use of the horizontal load transfer component and the axial load transmission component can accurately transfer the load of the jacking device 42 to the accident oil pool, avoiding the situation of damage to the accident oil pool caused by the single-point transfer of force of the jacking device 42, so as to reliably evaluate the stability and bearing capacity of the accident oil pool structure under the action of the load.

[0043] In this application, the horizontal load transfer component includes an arc plate 50 and a reinforcing rod 51. There are multiple arc plates 50, and the multiple arc plates 50 are provided with a fitting surface that fits the side wall of the accident oil pool. One side of the reinforcing rod 51 is connected to the arc plate 50 by including but not limited to bolts (not shown in the figure), and the other side is provided with a connection to the jacking device 42. During use, the jacking device 42 applies pressure towards the reinforcing rod 51, and the pressure on the reinforcing rod 51 is further transferred to the arc plate 50 and then to the structure of the accident oil pool. Under the action of the reinforcing rod 51 and the arc plate 50, it is ensured that the force on the outer wall of one side of the accident oil pool is balanced and stable, avoiding the occurrence of force point contact, so as to cause stress concentration and directly damage the accident oil pool, affecting the test measurement results. Moreover, the reinforcing rod 51 and the arc plate 50 can also be conveniently disassembled to adapt to accident oil pools of different sizes, improving the test versatility.

[0044] The provided axial load transmission component includes a transfer plate 60, a load-bearing column 61, and a contact plate 62. The transfer plate 60 is connected to the jacking device 42 at the top of the support frame 1. There are multiple load-bearing columns 61, which are distributed at the bottom of the transfer plate 60. One side of the contact plate 62 is connected to the multiple load-bearing columns 61, and the other side is provided with a fitting surface that fits the top of the accident oil pool. The jacking device 42 at the top of the support frame 1 outputs downward, and then is evenly transferred to the contact plate 62 through the transfer plate 60 and the load-bearing columns 61. Finally, the top of the accident oil pool bears the force to test the axial force-bearing capacity of the accident oil pool. The transfer plate 60, the load-bearing column 61, and the contact plate 62 transfer the load stably and reliably to ensure the test accuracy of the accident oil pool.

[0045] In this application, the output end of the jacking device 42 is also set as a spherical curved surface section 43, and there are grooves 7 adapted to the spherical curved surface section 43 on both the horizontal load transfer component and the axial load transmission component. The grooves 7 include but are not limited to providing a convex structure on the horizontal load transfer component and the axial load transmission component, and the grooves 7 are formed on this convex structure. This design allows the output end of the jacking device 42 to freely adjust the acting force direction and acting position within a certain range to adapt to uneven or uneven contact surfaces, ensuring uniform distribution of the load.

[0046] In this application, in order to monitor the displacement changes of the horizontal load transfer component and the axial load transmission component in real time after being stressed, a displacement sensor 420 is also provided on the top support device 42. The displacement sensor 420 can monitor the top support device 42 in real time. After being enabled, the displacement changes on the horizontal load transfer component and the axial load transmission component are used to adjust the applied load level.

[0047] In addition, an image monitoring device 90 is also provided on one side of the support frame 1. The image monitoring device 90 is used to observe the accident oil pool structure. The image monitoring device 90 includes but is not limited to being set as a DIC device. When in use, the DIC device can observe and record the deformation and failure characteristics of the structure during the entire loading process to ensure the precise control of the test.

[0048] When this application is in use, in order to further improve the precise control of the test, the accident oil pool test loading device further includes a hydraulic pump 421 and a central control system 91. Among them, the hydraulic pump 421 is connected to the top support device 42. The central control system 91 includes but is not limited to a signal acquisition system and a computer control system. The image monitoring device 90, the hydraulic pump 421, and the top support device 42 are all connected to the central control system. When in use, start the power supply of the central control system 91, perform system self-check and set the loading parameters, including the magnitude of the loading force, the loading speed, and the loading time, etc. Then, according to the control instructions issued by the central control system 91, the test starts, the top support device 42 starts to apply pressure, and the image monitoring device 90 monitors in real time, with precise and convenient operation.

[0049] Implementation principle of the embodiments of this application: Before the test starts, first complete the installation of the base unit, the support frame 1, and the loading unit. According to the size of the accident oil pool, adjust the positions of the support frame 1 and the loading unit. Then, turn on the power of the central control system 91, perform a system self-check, and set the loading parameters. Further, start the top support device 42 for pre-loading to check whether the central control system 91 is operating normally and whether it can accurately feedback data. Check whether the contact surface between the loading device and the accident oil pool is uniform to ensure no abnormal conditions. Then, according to the preset loading parameters, gradually increase the loading force of the top support device 42. Real-time monitor data such as the loading force and displacement through the hydraulic pump 421 and the displacement sensor 420 to ensure that the loading process proceeds along the predetermined trajectory. When the predetermined loading force is reached, keep the loading force stable for a certain period of time to simulate the actual use conditions. Observe the monitoring data to ensure the structural stability of the accident oil pool without abnormal deformation or displacement. During the entire loading process, continuously monitor the data of the displacement sensor 420 and the DIC device to understand the response of the accident oil pool in real time. If abnormal data is detected, immediately pause the loading and check the reason. According to the monitoring data and analysis results, if necessary, adjust the loading parameters to optimize the loading effect. Ensure that the adjusted loading process is still safe and controllable. After completing the predetermined loading test, gradually reduce the loading force of the top support device 42 until it is completely unloaded. Turn off the central control system 91, record and save all loading data and monitoring results. If it is to test the ultimate bearing capacity of the structure, a destructive test needs to be carried out. Pay attention to the load-time history curve after the loading peak, and observe and record the failure position and failure characteristics of the accident oil pool structure to analyze the residual strength of the structure. Analyze the loading data and monitoring results to evaluate the structural performance of the accident oil pool. According to the analysis results, put forward improvement suggestions or maintenance measures.

[0050] In the description of this application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to this application. Unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] It should be noted that in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0052] The above are only specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to these embodiments shown herein, but rather will conform to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. An accident oil pool structure test loading device, characterized in that: include: Base unit; A support frame (1) is movably arranged on a base unit, and a test cavity (2) is formed in the middle of the support frame (1) for accommodating an accident oil pool; The loading units are distributed on the support frame (1) and are provided in plurality. The plurality of loading units are used to apply loads to the accident oil pool in the circumferential direction and the axial direction.

2. The loading device for accident oil pool structure test according to claim 1, characterized in that: The base unit comprises: A fixed base (30) is arranged on two opposite sides of the accident oil pool; A sliding base (31) is movably connected to the fixed base (30), and the supporting frame (1) is mounted on the sliding base (31).

3. The loading device for accident oil pool structure test according to claim 1, characterized in that: The loading unit comprises A horizontal crossbeam (40), the horizontal crossbeam (40) being provided at the top of the support frame (1) and around the side of the support frame (1); A guide rail base (41) disposed on the horizontal beam (40); A supporting device (42) is movably connected to the guide rail base (41), and an output end of the supporting device (42) faces the accident oil pool.

4. The loading device for accident oil pool structure test according to claim 3, characterized in that: The loading unit further comprises: A horizontal load transfer component, one side of which is connected to the top support device (42) on the side of the support frame (1), and the other side of which is in contact with the outer wall of the accident oil pool; An axial load transmission component has one side connected to the hydraulic jack on the top of the support frame (1), and the other side abuts against the top wall of the accident oil pool.

5. The loading device for accident oil pool structure test according to claim 4, characterized in that: The horizontal load transfer assembly comprises: A plurality of circular arc plates (50) are provided, and each of the plurality of circular arc plates (50) is provided with a fitting surface that fits with the side wall of the accident oil pool; A reinforcing rod (51) has one side connected to the arc plate (50) and the other side connected to the supporting device (42).

6. The loading device for accident oil pool structure test according to claim 4, characterized in that: The axial load transmission assembly comprises: A transfer plate (60) connected to a top support device (42) at the top of the support frame (1); A plurality of supporting columns (61) are provided and distributed at the bottom of the transfer plate (60); A contact plate (62) has one side connected to the plurality of bearing columns (61) and the other side configured as a fitting surface fitted to the top of the accident oil pool.

7. The loading device for accident oil pool structure test according to claim 3, characterized in that: The output end of the supporting device (42) is set as a spherical curved surface segment (43), and the horizontal load transfer component and the axial load transmission component are both provided with a groove (7) adapted to the spherical curved surface segment (43).

8. The loading device for accident oil pool structure test according to claim 3, characterized in that: The bottom of the supporting device (42) is provided with an interface (8), and the interface (8) is movably connected to the guide rail base (41). The interface (8) is also provided with a bolt (80), and the bolt (80) is cooperatively connected to the guide rail base (41).

9. The loading device for accident oil pool structure test according to claim 3, characterized in that: The supporting device (42) is provided with a displacement sensor (420).

10. The loading device for accident oil pool structure test according to claim 1, characterized in that: An image monitoring device (90) is also provided on one side of the support frame (1), and the image monitoring device (90) is used to observe the structure of the accident oil pool.

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