A testing fixture for large-size tanks

Abstract

This utility model relates to the field of testing fixture technology, and particularly to a testing fixture for a large-size tank. It includes a central frame and sliding end frames and fixed end frames connected to both ends of the central frame. The tank is located within the central frame. A support cylinder section has multiple outer diameter pipes communicating with the interior of the support cylinder section. Limiting plates are installed inside the multiple outer diameter pipes. Bolts for radial supports at both ends of the tank pass through holes of matching size on the limiting plates and enter the outer diameter pipes. The radial supports are achieved through the cooperation of bolts inside the outer diameter pipes and the limiting plates. A fixed end connecting rod is installed along the axis at the end of the tank near the fixed end frame. Two positioning support rods are installed on the side of the fixed end frame away from the tank. Adjustment compensation holes are provided on the positioning support rods. Both ends of a radially positioned compensation loading rod are fixed to the positioning support rods through the adjustment compensation holes. The middle part of the compensation loading rod is connected to one end of the fixed end connecting rod. This solution provides a fixture capable of fixing a large-size tank.

Description

Technical Field

[0001] This utility model relates to the field of testing tooling technology, and in particular to a testing tooling for large-size tanks. Background Technology

[0002] Structural testing is a method used to test the strength of a structure, and completing the test often requires a strength testing platform.

[0003] Currently, there are some general-purpose structural component strength testing platforms on the market, which typically use hydraulic actuators for unidirectional or bidirectional loading. These platforms are mainly used to test metal components at room temperature, such as building steel beams and automobile chassis, and cannot cope with the dimensional shrinkage changes that occur when tanks contain cryogenic fluids.

[0004] Therefore, in order to address the above shortcomings, there is an urgent need for a testing fixture for large-size tanks that can test the strength performance of tanks at low temperatures. Utility Model Content

[0005] This utility model provides a testing fixture for large-size tanks, which can test the strength performance of the tanks at low temperatures.

[0006] This utility model embodiment provides a testing fixture for a large-size tank, including a middle frame and a sliding end frame and a fixed end frame connected to both ends of the middle frame. The tank is located in the middle frame, and both ends of the tank are respectively inserted into support cylinders fixed on the sliding end frame and support cylinders of the fixed end frame. The support cylinders are provided with multiple outer diameter pipes communicating with the interior of the support cylinders. Limiting plates are provided inside the multiple outer diameter pipes. The bolts of the radial supports at both ends of the tank pass through holes of the limiting plates that match their size and enter the outer diameter pipes. The radial supports apply radial tension through the cooperation of the bolts inside the outer diameter pipes and the limiting plates. A fixed end connecting rod is provided along the axis at one end of the tank near the fixed end frame. Two positioning support rods are provided on the side of the fixed end frame away from the tank. Adjustment compensation holes are provided on the positioning support rods. The two ends of the radially arranged compensation loading rods are fixed to the positioning support rods through the adjustment compensation holes. The middle part of the compensation loading rod is connected to one end of the fixed end connecting rod.

[0007] In one possible design, the middle frame is provided with multiple support saddles for supporting the tank.

[0008] In one possible design, the middle frame is provided with multiple coaxial fixing blocks, and the support saddle is disposed between the multiple coaxial fixing blocks so that the support saddle and the tank are coaxial.

[0009] In one possible design, the sliding end frame and the fixed end frame are connected by a connecting plate and the middle frame.

[0010] In one possible design, the hollowed-out portions of the fixed end frame and the sliding end frame are provided with supporting reinforcing plates, and the supporting cylinder is fixed to the fixed end frame and the sliding end frame by the supporting reinforcing plates.

[0011] In one possible design, a support reinforcement plate is provided at the location where the outer diameter pipe of the support cylinder is installed.

[0012] In one possible design, the outer diameter tube includes a locking nut and a limiting plate arranged sequentially along the axial direction. The limiting plate is fixed inside the outer diameter tube. The head of the radial support has a variable diameter design, with the smaller diameter portion passing through the limiting plate and the larger diameter portion opening at the limiting plate. The smaller diameter portion is provided with threads, and the locking nut engages with the threads to apply radial tension to the radial support.

[0013] In one possible design, elastic pads and adjusting pads are respectively provided on both sides of the limiting plate.

[0014] In one possible design, an anti-loosening nut is provided on the outside of the locking nut.

[0015] Compared with the prior art, this utility model has at least the following advantages: Modular and Adjustable: The end frame adopts a modular design, and each module can be quickly disassembled and assembled, which facilitates tooling maintenance and upgrades. It can be finely adjusted by connecting plates and radial support outer diameter pipe internal limit to compensate for welding and processing deformation errors such as tank ellipticity and inner container length.

[0016] Low-temperature compensation loading rod: Designed using a "reverse pre-processing" method based on the shrinkage deformation of the tank at -269°C calculated by finite element analysis. For example, if the total length of the inner container shrinks by 30mm under low-temperature conditions, the loading rod has a 30mm hole spacing, thus simulating the "interference fit" or "precise contact" state at low temperatures during room temperature testing. This is the key to achieving "high-precision" simulation.

[0017] It offers excellent safety and economic benefits: it can detect design flaws in advance, avoid catastrophic accidents during actual use, and protect the safety of people and property, resulting in significant social and economic benefits. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a testing fixture for a large-size tank provided in an embodiment of this utility model; Figure 2 This is a partial structural diagram of a testing fixture for a large-size tank after the tank is fixed, according to an embodiment of this utility model. Figure 3 This is a side view structural diagram of a testing fixture for a large-size tank provided in an embodiment of this utility model.

[0020] In the picture: 100-Tank body; 1-Middle frame; 2-Sliding end frame; 3-Fixed end frame; 4-Support cylinder section; 5-Outer diameter pipe; 6-Limiting plate; 7-Radial support; 8-Fixed end connecting rod; 9-Positioning support rod; 10-Adjustment compensation hole; 11-Compensation loading rod; 12-Support saddle; 13-Coaxial fixing block; 14-Connecting fixing plate; 15-Support reinforcing plate; 16-Locking nut; 17-Elastic pad; 18-Adjusting shim; 19-Anti-loosening nut; 20-Support reinforcing plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In this specification, it should be understood that the directional terms such as "upper" and "lower" used in the description of the embodiments of this utility model are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this utility model. Furthermore, in the context, it should also be understood that when it is mentioned that one element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0024] like Figures 1 to 3 As shown, this embodiment of the present invention provides a testing fixture for a large-size tank 100, including a middle frame 1 and a sliding end frame 2 and a fixed end frame 3 connected to both ends of the middle frame 1. The tank 100 is located in the middle frame 1. Both ends of the tank 100 are respectively inserted into the support cylinder 4 fixed on the sliding end frame 2 and the support cylinder 4 of the fixed end frame 3. The support cylinder 4 is provided with a plurality of outer diameter pipes 5 communicating with the interior of the support cylinder 4. Limiting plates 6 are provided inside the plurality of outer diameter pipes 5. The bolts of the radial supports 7 at both ends of the tank 100 pass through the limiting plates 6 and are sized to match. The matching hole enters the outer diameter pipe 5. The radial support 7 applies radial tension to the radial support 7 through the cooperation of the bolts and the limiting plate 6 inside the outer diameter pipe 5. A fixed end connecting rod 8 is provided along the axis at one end of the tank body 100 near the fixed end frame 3. Two positioning support rods 9 are provided on the side of the fixed end frame 3 away from the tank body 100. Adjustment compensation holes 10 are provided on the positioning support rods 9. The two ends of the radially arranged compensation loading rod 11 are fixed to the positioning support rod 9 through the adjustment compensation holes 10. The middle part of the compensation loading rod 11 is connected to one end of the fixed end connecting rod 8.

[0025] In this embodiment, the cooperation between the bolt and the limiting plate 6 enables radial tension of the tank 100, achieving strength testing under multiple working conditions. By fixing the compensation loading rod 11 to the adjustment compensation hole 10 and reserving the hole spacing for the low-temperature shrinkage of the tank 100, the preset shrinkage amount of the tank 100 is compressed, ultimately enabling the tank 100 to be tested for strength at low temperatures under normal temperature.

[0026] In some embodiments of this utility model, the middle frame 1 is provided with a plurality of support saddles 12 for supporting the tank body 100.

[0027] In this embodiment, multiple support saddles 12 can provide good support for the tank 100.

[0028] In some embodiments of this utility model, a plurality of coaxial fixing blocks 13 are provided on the middle frame 1, and the support saddle 12 is disposed between the plurality of coaxial fixing blocks 13 so that the support saddle 12 and the tank 100 are coaxial.

[0029] In this embodiment, multiple coaxial fixing blocks 13 enable the support saddle 12 and the tank 100 to have a high degree of coaxiality.

[0030] In some embodiments of this utility model, the sliding end frame 2 and the fixed end frame 3 are connected by a connecting fixing plate 14 and the middle frame 1.

[0031] In some embodiments of this utility model, the hollowed-out portions of the fixed end frame 3 and the sliding end frame 2 are provided with support reinforcing plates 20, and the support cylinder 4 is fixed to the fixed end frame 3 and the sliding end frame 2 by the support reinforcing plates 20.

[0032] In some embodiments of this utility model, a support reinforcement plate 15 is provided at the location where the outer diameter pipe of the support cylinder is installed.

[0033] In some embodiments of this utility model, the outer diameter pipe 5 includes a locking nut 16 and a limiting plate 6 arranged sequentially along the axial direction. The limiting plate 6 is fixed inside the outer diameter pipe 5. The head of the radial support 7 is designed with a variable diameter. The outer part with a smaller diameter passes through the limiting plate 6, and the outer part with a larger diameter is opened at the limiting plate 6. The outer part with a smaller diameter is provided with threads. The locking nut 16 and the threads cooperate to apply radial tension to the radial support 7.

[0034] In some embodiments of this utility model, elastic pads 17 and adjusting pads 18 are respectively provided on both sides of the limiting plate 6.

[0035] In some embodiments of this utility model, a locking nut 19 is provided on the outside of the locking nut 16.

[0036] Assembly process operation instructions: Choose a relatively flat area, first position the middle frame, place and fix it, then adjust the flatness of the tooling while reserving space for the assembly of the sliding end frame and the fixed end frame; remove the detachable part of the top of the middle frame, then hoist the support saddle into the middle frame, place it according to the position marked on the tooling drawing, then adjust the flatness of the saddle and fix it firmly, then use the coaxial fixing block of the saddle to adjust the left and right directions to be coaxial and fix it firmly, then hoist the inner container into the middle frame and slowly place it on the support saddle, then adjust the orientation of the inner container to 180° at the top and 0° at the bottom (the contact part between the outer surface of the inner container and the surface of the support saddle should be separated by soft rubber).

[0037] Hoist the sliding end frame and slowly move it toward the middle frame until it is fitted with the middle frame. During the translation process of sleeving and approaching, the screw rod at the end of the radial support assembly shall pass through the pre-reserved hole of the radial support limit plate in the outer diameter pipe. After confirming that the sleeving is in place, connect the sliding end frame and the middle frame with the connection fixing plate, and lock and fix them with bolts. Then, install nuts on the parts of the pre-reserved threaded rods at the ends of the 4 radial support assemblies that extend out of the limit plate in the outer diameter pipe, and tighten them slowly, while slowly tensioning the 4 radial support assemblies. The assembly is qualified when the angle and length meet the test requirements. Assemble the fixed end frame in the same way; then install the compensation loading rod (to simulate multiple contraction states of the inner container under low-temperature working conditions, and carry out multi-angle load-bearing tests on the radial support assembly, select appropriate adjustment compensation hole positions and fasten them with bolts), then weld and fix the fixed end connecting rod at the fixed end of the inner container to the compensation loading rod; finally, install and fix the top of the middle frame.

[0038] After confirming that all processes are properly performed, fix the lifting lugs on the top of the radial support assembly test tool, hoist the tool and the inner container vertically as a whole, remove the coaxial fixing block of the adjusting saddle, move away the saddle supporting the inner container at the bottom, then transfer and fix them stably on the test transport flatbed, and then inject pure water of the designed equal weight into the inner container as the medium for the test; with the power of the flatbed, the vehicle will travel on the selected and planned road to test whether its structural strength meets the standards. The purpose of this test is to simulate and verify whether the designed structure of the inner container and the support suspension can withstand dynamic loads such as vibration, impact, sudden braking, and acceleration during transportation. After the above tests are completed, collect relevant data, and evaluate the structural integrity, structural stability, durability and safety of the inner container and the support suspension under dynamic conditions (such as visual inspection of weld fillet cracking, radial support assembly fracture, etc.).

[0039] After all test items are completed, drain all the pure water from the inner container, then unload the support suspension test tool and the inner container as a whole and transfer them to the manufacturing workshop for placement, then disassemble the support suspension test tool while using the traveling crane to transfer the inner container to the designated position for placement, and finally clean the inside and outside of the inner container thoroughly.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present utility model, not to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some of the technical features therein; these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A testing fixture for a large-size tank, characterized in that, The system includes a central frame and sliding end frames and fixed end frames connected to both ends of the central frame. The tank body is located within the central frame. Both ends of the tank body are inserted into support cylinders fixed on the sliding end frames and support cylinders of the fixed end frames, respectively. Each support cylinder has multiple outer diameter pipes communicating with the interior of the support cylinder. Limiting plates are installed inside the multiple outer diameter pipes. Bolts for radial supports at both ends of the tank body pass through holes of matching size on the limiting plates and enter the outer diameter pipes. The radial supports apply radial tension through the cooperation of the bolts inside the outer diameter pipes and the limiting plates. A fixed end connecting rod is provided along the axis at one end of the tank body near the fixed end frame. Two positioning support rods are provided on the side of the fixed end frame away from the tank body. Adjustment compensation holes are provided on the positioning support rods. Both ends of a radially arranged compensation loading rod are fixed to the positioning support rods through the adjustment compensation holes. The middle part of the compensation loading rod is connected to one end of the fixed end connecting rod.

2. The testing fixture for a large-size tank according to claim 1, characterized in that, The middle frame is provided with multiple support saddles for supporting the tank.

3. The testing fixture for a large-size tank according to claim 2, characterized in that, The middle frame is provided with multiple coaxial fixing blocks, and the support saddle is arranged between the multiple coaxial fixing blocks so that the support saddle and the tank are coaxial.

4. The testing fixture for a large-size tank according to claim 1, characterized in that, The sliding end frame and the fixed end frame are connected by a connecting fixing plate and the middle frame.

5. The testing fixture for a large-size tank according to claim 1, characterized in that, The hollowed-out portions of the fixed end frame and the sliding end frame are provided with supporting reinforcing plates, and the supporting cylindrical section is fixed to the fixed end frame and the sliding end frame by the supporting reinforcing plates.

6. The testing fixture for a large-size tank according to claim 1, characterized in that, A support reinforcement plate is provided at the location where the outer diameter pipe of the support cylinder is installed.

7. The testing fixture for a large-size tank according to claim 1, characterized in that, The outer diameter tube includes a locking nut and a limiting plate arranged sequentially along the axial direction. The limiting plate is fixed inside the outer diameter tube. The head of the radial support has a variable diameter design. The smaller diameter part passes through the limiting plate, and the larger diameter part is opened at the limiting plate. The smaller diameter part is provided with threads. The locking nut and the threads cooperate to apply radial tension to the radial support.

8. The testing fixture for a large-size tank according to claim 7, characterized in that, Elastic pads and adjusting pads are respectively provided on both sides of the limiting plate.

9. The testing fixture for a large-size tank according to claim 7, characterized in that, An anti-loosening nut is provided on the outside of the locking nut.

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