Main machine structure of full-size pipeline under-pressure tensile test equipment

Abstract

The embodiment of the invention provides a main machine structure of full-size pipeline under-pressure tensile test equipment. The main machine structure comprises a first movable base, a second movable base, a first box frame assembly, a second box frame assembly, a first chuck assembly, a second chuck assembly, a plurality of jacking column assemblies, a plurality of hydraulic cylinders and a plurality of jacking column supporting beams. The plurality of top column assemblies, the plurality of hydraulic cylinders and the plurality of top column supporting beams are arranged between the first box frame assembly and the second box frame assembly side by side; the first end of each jacking column assembly is connected with the corresponding hydraulic cylinder, the hydraulic cylinders are connected to the first box frame assembly, the second end of each jacking column assembly is connected with the second box frame assembly, and the jacking column supporting beams support the corresponding jacking column assemblies. According to the embodiment of the invention, the whole machine is compact in design, the weight and the size of equipment can be reduced, and the requirements of ten-thousand-ton full-size pipeline under-pressure tensile tests are met.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the technical field of oil and gas pipeline performance testing, and specifically relate to a mainframe structure of a full-size pipeline pressure tensile test equipment. Background Art

[0002] The full-size pipeline tensile test under pressure is an important means to evaluate the fracture toughness, strain capacity, defect tolerance and safety reliability of the pipeline girth weld joint under the conditions of internal pressure and axial load. Compared with the small specimen test and wide plate tensile test, the full-size pipeline tensile test under pressure can simulate the stress state of the actual operating pipeline and can more realistically reflect the influence of internal pressure, overall performance non-uniformity of girth weld joint, welding residual stress and welding defects on the service performance of pipeline girth weld joint.

[0003] As long-distance oil and gas pipelines develop towards larger diameters and thicker walls, the full-size pressure tensile test of large-diameter pipe girth weld joints requires a high level of testing machine capacity. Currently, there are no full-size pipe pressure tensile testing machines with a capacity of 10,000 tons or more that can meet the girth weld test requirements at home and abroad. Existing full-size pipe pressure tensile testing machines mostly use a vertical single cylinder or a horizontal two-beam and two-column structure. The largest full-size pipe pressure tensile testing machine in the world has a tensile force of 7,100 tons, occupies a large space, and has a high manufacturing cost; and

[0004] In the test, the additional bending stress generated by the full-size specimen of the large-diameter pipe girth weld joint and the deadweight of the internal pressure medium is large, which is different from the actual service environment of the pipeline and will affect the accuracy of the test results. In summary, the existing related technologies cannot meet the pressure tensile test requirements of girth weld joints of 10,000-ton full-size pipelines (such as X80, D1422mm×30.8mm full-size pipelines); for the pressure tensile test of 10,000-ton full-size pipelines, the problems of large volume and high cost need to be solved. Summary of the invention

[0005] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art and provide a mainframe structure of a full-size pipeline pressure tensile test equipment.

[0006] An embodiment of the present disclosure provides a mainframe structure of a full-size pipeline pressure tensile test equipment, the mainframe structure comprising:

[0007] A first mobile base and a second mobile base are arranged relatively spaced apart;

[0008] A first box frame assembly and a second box frame assembly, wherein the first box frame assembly is fixed to the first mobile base, and the second box frame assembly is erected on the second mobile base;

[0009] A first chuck assembly and a second chuck assembly, wherein the first chuck assembly is fixed to the first box frame assembly and is used for detachable connection with the first end of the full-size pipe, and the second chuck assembly is fixed to the second box frame assembly and is used for detachable connection with the second end of the full-size pipe;

[0010] A plurality of top column assemblies, a plurality of hydraulic cylinders and a plurality of top column support beams, wherein the plurality of top column assemblies, the plurality of hydraulic cylinders and the plurality of top column support beams are arranged side by side between the first box frame assembly and the second box frame assembly; and a first end of each of the top column assemblies is connected to the corresponding hydraulic cylinder, the hydraulic cylinder is connected to the first box frame assembly, a second end of each of the top column assemblies is connected to the second box frame assembly, and the top column support beam is supported by the corresponding top column assembly.

[0011] Optionally, the main engine structure further includes at least one pair of buffer cylinder assemblies, and a buffer cylinder pull rod slidably connected to each corresponding pair of the buffer cylinder assemblies;

[0012] Each pair of the buffer cylinder assemblies is respectively arranged on the first box frame assembly and the second box frame assembly, and is respectively located on a side of the first box frame assembly away from the hydraulic cylinder and a side of the second box frame assembly away from the second end of the top column assembly.

[0013] Optionally, the buffer cylinder assembly is arranged in four pairs, and the buffer cylinder pull rods are correspondingly arranged in four pairs.

[0014] Optionally, the first box frame assembly is configured as an integral frame, and adopts a ribbed form model with a preset bending stiffness;

[0015] The first box frame assembly is provided with at least one first buffer cylinder mounting hole for mounting and fixing the corresponding buffer cylinder assembly;

[0016] The first box frame assembly is also provided with a first clamp mounting hole for mounting and fixing the first clamp assembly.

[0017] Optionally, the second box frame assembly is configured as an integral frame, and adopts a ribbed form model with a preset bending stiffness;

[0018] The second box frame assembly is provided with at least one second buffer cylinder mounting hole for mounting and fixing the corresponding buffer cylinder assembly;

[0019] The second box frame assembly is also provided with a second clamp mounting hole for mounting and fixing the second clamp assembly.

[0020] Optionally, the mainframe structure further includes a centering component located between the second box frame assembly and the second mobile base;

[0021] The centering assembly comprises a housing, a first centering oil cylinder and a second centering oil cylinder fixed to the housing, a first centering slider and a second centering slider slidably arranged on the housing, the piston rod of the first centering oil cylinder is fixedly connected to the first centering slider, and the piston rod of the second centering oil cylinder is fixedly connected to the second centering slider;

[0022] The first centering cylinder is used to drive the first centering slider to move along the axial direction of the housing to adjust the up and down position of the second box frame assembly;

[0023] The second centering oil cylinder is used to drive the second centering slider to move along the radial direction of the shell to adjust the left and right position of the second box frame assembly.

[0024] Optionally, the top column assembly includes a top column, a top column end and a fixing member;

[0025] The top column end caps are disposed at both ends of the top column, the top column end cap at the first end is used to be connected to the corresponding hydraulic cylinder, and the top column end cap at the second end is fixedly connected to the second box frame assembly via the fixing member.

[0026] Optionally, the top column assembly includes a top column group, a top column end and a fixing member, and the top column group includes at least two top columns connected in pairs;

[0027] Both ends of each top column are provided with the top column end head, and each top column is fixed with the corresponding top column end head by the fixing member to achieve connection; wherein,

[0028] The top column end head at the first end of the top column near the hydraulic cylinder side in the top column group is used to be connected to the corresponding hydraulic cylinder, and the top column end head at the second end of the top column near the second box frame assembly side in the top column group is fixedly connected to the second box frame assembly through the fixing member.

[0029] Optionally, the host structure further includes a plurality of force sensing units;

[0030] The force sensing unit is located between the corresponding top column assembly and the hydraulic cylinder, and one end of the force sensing unit is connected to the first end of the corresponding top column assembly, and the other end of the force sensing unit is connected to the corresponding hydraulic cylinder.

[0031] Optionally, the mainframe structure further includes a movable track and a plurality of hydraulic cylinder supports;

[0032] The first movable base and the second movable base are slidably connected to the movable track, one end of the hydraulic cylinder bracket is supported on the corresponding hydraulic cylinder, and the other end of the hydraulic cylinder bracket is fixed to the first movable base.

[0033] The main structure of the full-size pipeline pressure tensile test equipment of the embodiment of the present disclosure can reduce the volume and weight of the equipment while ensuring the rigidity and strength through the first movable base, the second movable base, the first box frame assembly, the second box frame assembly, the first chuck assembly, the second chuck assembly, the multiple top column assemblies, the multiple hydraulic cylinders and the multiple top column support beams. The whole machine is compactly designed and each single part in the whole machine is easy to dispatch, transfer and transport, which reduces the manufacturing cost of the test equipment and can meet the needs of 10,000-ton full-size pipeline pressure tensile test. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A side view of a mainframe structure of a full-size pipeline pressure tensile test equipment according to an embodiment of the present disclosure;

[0035] Figure 2 A top view of a mainframe structure of a full-size pipeline pressure tensile test equipment according to another embodiment of the present disclosure;

[0036] Figure 3 It is a three-view drawing of a centering component of a mainframe structure of a full-size pipeline under-pressure tensile test equipment according to another embodiment of the present disclosure;

[0037] Figure 4 It is a structural schematic diagram of a top column assembly of a full-size pipeline pressure tensile test equipment according to another embodiment of the present disclosure;

[0038] Figure 5 It is a structural schematic diagram of a pipeline support of a full-size pipeline pressure tensile test equipment according to another embodiment of the present disclosure;

[0039] Figure 6 The present invention is a schematic structural diagram of a chuck assembly of a full-size pipeline pressure tensile test equipment according to another embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] like Figure 1 and Figure 2 As shown, a mainframe structure 100 of a full-size pipeline pressure tensile test equipment, the mainframe structure 100 includes:

[0042] The first mobile base 110 and the second mobile base 120 are arranged with a relative spacing. The first box frame assembly 130 and the second box frame assembly 140, the first box frame assembly 130 is fixed to the first mobile base 110, and the second box frame assembly 140 is mounted on the second mobile base 120. The first chuck assembly 150 and the second chuck assembly 160, the first chuck assembly 150 is fixed to the first box frame assembly 130 and is used to be detachably connected to the first end of the full-size pipe 200, and the second chuck assembly 160 is fixed to the second box frame assembly 140 and is used to be detachably connected to the second end of the full-size pipe 200.

[0043] A plurality of top column assemblies 170, a plurality of hydraulic cylinders 180, and a plurality of top column support beams 190 are arranged side by side between the first box frame assembly 130 and the second box frame assembly 140. In addition, the first end of each of the top column assemblies 170 is connected to the corresponding hydraulic cylinder 180, the hydraulic cylinder 180 is connected to the first box frame assembly 130, the second end of each of the top column assemblies 170 is connected to the second box frame assembly 140, and the top column support beam 190 is supported by the corresponding top column assembly 170.

[0044] Specifically, Figure 1 and Figure 2 As shown, in order to meet the requirements of the 10,000-ton full-size pipeline under pressure tensile test, the embodiment of the present disclosure provides a mainframe structure 100 of a full-size pipeline under pressure tensile test equipment. In specific applications, the two ends of the full-size pipeline 200 are detachably fixed to the first chuck assembly 150 and the second chuck assembly 160, respectively, and the fixing method can be welding or the like, and then removed after the test is completed.

[0045] like Figure 1 and Figure 2 As shown, during the test, multiple hydraulic cylinders 180 synchronously provide hydraulic pressure for jacking, and the thrust generated is respectively transmitted to the first box frame assembly 130 and to the second box frame assembly 130 through the top column assembly 170, and the first box frame assembly 130 and the second box frame assembly 140 are respectively moved in opposite directions through the first movable base 110 and the second movable base 120 that are fixedly connected. It is not difficult to understand that during the reverse movement of the first box frame assembly 130 and the second box frame assembly 140, the first clamp assembly 150 and the second clamp assembly 160 apply load to the full-size pipe 200 for stretching until the full-size pipe 200 breaks. The top column support beam 190 is supported on the corresponding top column assembly 170, and plays a supporting role for the top column assembly 170.

[0046] As a specific example, Figure 1 and Figure 2 As shown, the mainframe structure 100 of the full-size pipeline pressure tensile test equipment can specifically adopt a two-beam four-column structure with four cylinders synchronized, that is, four hydraulic cylinders 180, two top column support beams 190 and four top column assemblies 170. The four hydraulic cylinders 180 are distributed in a rectangular shape, and each hydraulic cylinder 180 is connected to the first box frame assembly 130 and a corresponding top column assembly 170. And, in the longitudinal direction, each top column support beam 190 supports two top column assemblies 170. Of course, the hydraulic cylinders, top column support beams and top column assemblies can also be set to other different numbers accordingly, and this embodiment does not make specific restrictions on this. Multiple hydraulic cylinders, multiple top column support beams and multiple top column assemblies are arranged side by side between the first box frame assembly and the second box frame assembly.

[0047] The main structure of the full-size pipeline pressure tensile test equipment of the embodiment of the present disclosure can ensure the rigidity and strength of the test machine under the main structure through the first movable base, the second movable base, the first box frame assembly, the second box frame assembly, the first chuck assembly, the second chuck assembly, the top column assembly, the hydraulic cylinder and the top column support beam, and can reduce the volume and weight of the equipment. The main structure is compactly designed and each single part in the main structure is easy to dispatch, transfer and transport, which reduces the manufacturing cost of the test equipment and can meet the needs of 10,000-ton full-size pipeline pressure tensile test.

[0048] For example, Figure 1 and Figure 2 As shown, the mainframe structure 100 further includes at least one pair of buffer cylinder assemblies 310, and buffer cylinder pull rods 311 slidably connected to each pair of the buffer cylinder assemblies 310. Each pair of the buffer cylinder assemblies 310 are respectively disposed on the first box frame assembly 130 and the second box frame assembly 140, and are respectively located on a side of the first box frame assembly 130 away from the hydraulic cylinder 180 and a side of the second box frame assembly 140 away from the second end of the top column assembly 170.

[0049] Specifically, Figure 1 and Figure 2 As shown, the mainframe structure 100 includes at least one pair of buffer cylinder assemblies 310. That is, the mainframe structure 100 is provided with at least one buffer cylinder assembly 310 on the outside of the first box frame assembly 130, and one buffer cylinder assembly 310 on the outside of the second box frame assembly 140. The two corresponding buffer cylinder assemblies 310 on the first box frame assembly 130 and the second box frame assembly 140 form a pair. A buffer cylinder pull rod 311 is slidably connected between each pair of buffer cylinders 310. As a specific example, Figure 1 and Figure 2As shown, the buffer cylinder assemblies 310 are arranged in four pairs, a total of eight, and each pair of buffer cylinder assemblies 310 corresponds to one hydraulic cylinder 180, and four buffer cylinder tie rods 311 are arranged accordingly. The impact force generated by breaking the full-size pipe 200 during the test will cause displacement of both ends of the stretching machine, thereby causing an impact problem that affects the life of the stretching machine. The four pairs of buffer cylinder assemblies 310 and the corresponding four buffer cylinder tie rods 311 connected in a sliding manner can effectively solve the impact problem, thereby extending the life of the stretching machine.

[0050] The main machine structure of the full-size pipeline pressure tensile test equipment of the embodiment of the present disclosure can effectively solve the impact problem through each pair of buffer cylinder assemblies and corresponding buffer cylinder pull rods, thereby extending the service life of the tensile machine.

[0051] For example, Figure 1 and Figure 2 As shown, the first box frame assembly 130 is set as an integral frame and adopts a ribbed model with a preset bending stiffness. The first box frame assembly 130 is provided with at least one first buffer cylinder mounting hole (not shown in the figure) for mounting and fixing the corresponding buffer cylinder assembly 310. The first box frame assembly 130 is also provided with a first chuck mounting hole (not shown in the figure) for mounting and fixing the first chuck assembly 150.

[0052] Furthermore, the second box frame assembly 140 is configured as an integral frame and adopts a ribbed model with a preset bending stiffness. The second box frame assembly 140 is provided with at least one second buffer cylinder mounting hole (not shown in the figure) for mounting and fixing the corresponding buffer cylinder assembly 310. The second box frame assembly 140 is also provided with a second chuck mounting hole (not shown in the figure) for mounting and fixing the second chuck assembly 160.

[0053] The use of the ribbed model can effectively improve the bending rigidity of the integral frame, and is conducive to the first box frame assembly and the second box frame assembly to bear the load in a balanced manner. The first buffer cylinder mounting hole and the first clamp mounting hole opened in the first box frame assembly can be used to install and fix the corresponding buffer cylinder assembly and the first clamp assembly, and the second buffer cylinder mounting hole and the second clamp mounting hole opened in the second box frame assembly can be used to install and fix the corresponding buffer cylinder and the second clamp assembly, which effectively reduces the volume and weight of the main structure, makes the main structure more compact, and reduces the manufacturing cost of the testing machine.

[0054] For example, Figures 1 to 3As shown, the mainframe structure 100 further includes a centering assembly 410 located between the second box frame assembly 140 and the second mobile base 120. The centering assembly 410 includes a housing 411, a first centering oil cylinder 412 and a second centering oil cylinder 413 fixed to the housing 411, a first centering slider 414 and a second centering slider 415 slidably disposed on the housing 411, a piston rod of the first centering oil cylinder 412 is fixedly connected to the first centering slider 414, and a piston rod of the second centering oil cylinder 413 is fixedly connected to the second centering slider 415. The first centering oil cylinder 412 is used to drive the first centering slider 414 to move axially along the housing 411 to adjust the up and down position of the second box frame assembly 140. The second centering oil cylinder 413 is used to drive the second centering slider 415 to move radially along the housing 411 to adjust the left and right position of the second box frame assembly 140.

[0055] Specifically, Figures 1 to 3 As shown, the second box frame assembly 140 is mounted on the second movable base 120, and a centering component 410 is arranged between the second box frame assembly 140 and the second movable base 120. Among them, the housing 411 is located between the second box frame assembly 140 and the second movable base 120, and the first centering oil cylinder 412 drives the first centering slider 414 to move axially along the housing 411 by using its piston rod. The first centering slider 414 is connected to the second box frame assembly 140 during the axial movement along the housing 411, and drives the second box frame assembly 140 to move axially along the housing 411, thereby adjusting the upper and lower positions of the second box frame assembly 140. The second centering cylinder 413 drives the second centering slider 415 to move radially along the shell 411 by using its piston rod, and after the first centering slider 414 is connected to the second box frame assembly 140, the second centering slider 415 drives the second box frame assembly 140 to move radially along the shell 411, thereby adjusting the left and right position of the second box frame assembly 140.

[0056] The main machine structure of the full-size pipeline pressure tensile test equipment of the embodiment of the present disclosure can adjust the up-down position and left-right position of the second box frame assembly through the set centering component, thereby adjusting the second box frame assembly to be aligned with the first box frame assembly, and then adjusting the second chuck assembly to be aligned with the first chuck assembly, so that the full-size pipeline can be better detachably fixedly connected to the first chuck assembly and the second chuck assembly.

[0057] For example, Figure 1 , Figure 2 and Figure 4As shown, the top column assembly 170 includes a top column 171, a top column end 172 and a fixing member 173. The top column end 172 is provided at both ends of the top column 171, the top column end 172 at the first end is used to connect to the corresponding hydraulic cylinder 180, and the top column end 172 at the second end is fixedly connected to the second box frame assembly 140 through the fixing member 173.

[0058] Specifically, Figure 1 , Figure 2 and Figure 4 As shown, the top column end 172 at the first end of each top column 171 is used to connect to the corresponding hydraulic cylinder 180, and the top column end 172 at the second end of each top column 171 is directly fixedly connected to the second box frame assembly 140 through a fixing member 173.

[0059] Furthermore, if the axial length of the above-mentioned top column cannot match the axial length of the full-size pipe, it is necessary to consider extending the length of the top column. That is to say, when the axial length of each top column cannot match the axial length of the full-size pipe to be tested, the main structure using the top column cannot perform a tensile test on the full-size pipe to be tested. At this time, it is necessary to consider extending the length of the top column to perform the test, for example, using Figure 4 The top column group shown in the figure includes at least two top columns 171 connected in pairs. The top column end 172 is provided at both ends of each top column 171, and each top column 171 fixes the corresponding top column end 172 through the fixing member 173 to achieve connection. Among them, the top column end 172 at the first end of the top column 171 close to the hydraulic cylinder 180 in the top column group is used to connect to the corresponding hydraulic cylinder 180, and the top column end 172 at the second end of the top column 171 close to the second box frame assembly 140 in the top column group is fixedly connected to the second box frame assembly 140 through the fixing member 173. It should be noted that the fixing member can be a bolt, and of course, the fixing member can also be other parts to achieve the fixing effect, and this embodiment does not make specific restrictions on this.

[0060] The main structure of the full-size pipeline pressure tensile test equipment of the embodiment of the present disclosure can effectively transmit the driving force of the hydraulic cylinder to the second box frame assembly through the arranged top column or top column group, thereby pushing the first box frame assembly and the second box frame assembly to move in opposite directions respectively through the hydraulic cylinder to stretch the full-size pipeline.

[0061] For example, Figure 1 and Figure 2As shown, the mainframe structure 100 further includes a plurality of force sensing units 500. The force sensing unit 500 is located between the corresponding top column assembly 170 and the hydraulic cylinder 180, and one end of the force sensing unit 500 is connected to the first end of the corresponding top column assembly 170, and the other end thereof is connected to the corresponding hydraulic cylinder 180.

[0062] Specifically, Figure 1 and Figure 2 As shown, during the process of the hydraulic cylinder 180 providing hydraulic pressure for jacking, the first box frame assembly 130 and the second box frame assembly 140 move in opposite directions respectively, and the first clamp assembly 150 and the second clamp assembly 160 apply load to the full-size pipe 200 for stretching until the full-size pipe 200 breaks. The force sensing unit 500 located between the corresponding jacking column assembly 170 and the hydraulic cylinder 180 can obtain the force data between the corresponding jacking column assembly 170 and the hydraulic cylinder 180 in real time, thereby obtaining the force data of the full-size pipe 200.

[0063] For example, Figure 1 and Figure 2 As shown, the mainframe structure further includes a moving track 600 and a plurality of hydraulic cylinder supports 700. The first moving base 110 and the second moving base 120 are slidably connected to the moving track 600, one end of the hydraulic cylinder support 700 is supported on the corresponding hydraulic cylinder 180, and the other end of the hydraulic cylinder support 700 is fixed to the first moving base 110.

[0064] Specifically, Figure 1 and Figure 2 As shown, one end of the hydraulic cylinder support 700 is supported on the corresponding hydraulic cylinder 180, and the other end is fixedly connected to the first movable base to support and fix the hydraulic cylinder. The first movable base 110 and the second movable base 120 are slidably arranged on the movable track 600, which can effectively reduce the friction resistance encountered by the first movable base 110 and the second movable base 120 when performing opposite movements, thereby making the simulation data of the tensile test more accurate.

[0065] It should be noted that if Figure 5As shown, the main structure 100 can also be provided with at least one pipe support 800, and the pipe support 800 is used to support the full-size pipe 200, and the pipe support 800 includes a support portion 810 and a support portion 820. The first end of the support portion 810 is used for fixing, and the second end of the support portion 810 is fixedly connected to the support portion 820, and the support portion 820 is used to support the full-size pipe 200. As a specific example, three pipe supports are provided, and are evenly distributed at the bottom of the full-size pipe. Of course, the pipe supports can also be provided in other different quantities and distributed at the bottom of the full-size pipe as needed to support the full-size pipe, and this embodiment does not impose specific restrictions on this. The provided pipe support can play a role in reducing the additional bending stress generated by the deadweight of the internal pressure medium.

[0066] It is further necessary to explain that if Figure 6 As shown in FIG. 1 , as a specific example, the first clamp assembly 150 and the second clamp assembly 160 can both be formed by fixing a clamp flange plate 910 and a transition pipe section 920. In addition, a plurality of connection holes 911 are provided in the edge area of ​​the clamp flange plate 910, and the connection holes 911 are used to install bolts to connect the corresponding box frame assembly and the full-size pipeline 200. Specifically, as Figure 6 As shown, the first chuck assembly 150 and the second chuck assembly 160 can both be formed by welding a chuck flange plate 910 with a thickness of 150 mm and a transition pipe section 920. During the test, the two ends of the full-size pipeline 200 are respectively welded to the corresponding transition pipe section 920 for tensile testing, which avoids the direct welding of the full-size pipeline to the chuck flange plate, can effectively solve the problem of excessive concentrated stress in the corner weld, and make the test safer and more reliable. In addition, 38 connection holes can be opened, and 12.9 grade M95 high-strength bolts with low temperature resistance of minus 20 degrees Celsius are customized, and the load of a single bolt can reach 463T. The corresponding box frame assembly and the full-size pipeline are connected by customized bolts, and the bolt tensioner is used for pre-tightening during installation to make the bolts evenly and reliably stressed.

[0067] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A mainframe structure of a full-size pipeline pressure tensile test equipment, characterized in that: The host structure includes: A first mobile base and a second mobile base are arranged relatively spaced apart; A first box frame assembly and a second box frame assembly, wherein the first box frame assembly is fixed to the first mobile base, and the second box frame assembly is erected on the second mobile base; A first chuck assembly and a second chuck assembly, wherein the first chuck assembly is fixed to the first box frame assembly and is used for detachable connection with the first end of the full-size pipe, and the second chuck assembly is fixed to the second box frame assembly and is used for detachable connection with the second end of the full-size pipe; A plurality of top column assemblies, a plurality of hydraulic cylinders and a plurality of top column support beams, wherein the plurality of top column assemblies, the plurality of hydraulic cylinders and the plurality of top column support beams are arranged side by side between the first box frame assembly and the second box frame assembly; and a first end of each of the top column assemblies is connected to the corresponding hydraulic cylinder, the hydraulic cylinder is connected to the first box frame assembly, a second end of each of the top column assemblies is connected to the second box frame assembly, and the top column support beam is supported by the corresponding top column assembly.

2. The main machine structure of the full-size pipeline pressure tensile test equipment according to claim 1 is characterized in that: The main engine structure further comprises at least one pair of buffer cylinder assemblies, and a buffer cylinder pull rod slidably connected to each corresponding pair of the buffer cylinder assemblies; Each pair of the buffer cylinder assemblies is respectively arranged on the first box frame assembly and the second box frame assembly, and is respectively located on a side of the first box frame assembly away from the hydraulic cylinder and a side of the second box frame assembly away from the second end of the top column assembly.

3. The main machine structure of the full-size pipeline pressure tensile test equipment according to claim 2 is characterized in that: The buffer oil cylinder assemblies are arranged in four pairs, and the buffer oil cylinder pull rods are correspondingly arranged in four numbers.

4. The main machine structure of the full-size pipeline pressure tensile test equipment according to claim 2 or 3 is characterized in that: The first box frame assembly is configured as an integral frame and adopts a ribbed form model with a preset bending stiffness; The first box frame assembly is provided with at least one first buffer cylinder mounting hole for mounting and fixing the corresponding buffer cylinder assembly; The first box frame assembly is also provided with a first clamp mounting hole for mounting and fixing the first clamp assembly.

5. The main machine structure of the full-size pipeline pressure tensile test equipment according to claim 2 or 3 is characterized in that: The second box frame assembly is configured as an integral frame and adopts a ribbed model with a preset bending stiffness; The second box frame assembly is provided with at least one second buffer cylinder mounting hole for mounting and fixing the corresponding buffer cylinder assembly; The second box frame assembly is also provided with a second clamp mounting hole for mounting and fixing the second clamp assembly.

6. The main machine structure of the full-size pipeline pressure tensile test equipment according to any one of claims 1 to 3, characterized in that: The mainframe structure further includes a centering assembly located between the second box frame assembly and the second mobile base; The centering assembly comprises a housing, a first centering oil cylinder and a second centering oil cylinder fixed to the housing, a first centering slider and a second centering slider slidably arranged on the housing, the piston rod of the first centering oil cylinder is fixedly connected to the first centering slider, and the piston rod of the second centering oil cylinder is fixedly connected to the second centering slider; The first centering oil cylinder is used to drive the first centering slider to move along the axial direction of the housing to adjust the up and down position of the second box frame assembly; The second centering oil cylinder is used to drive the second centering slider to move along the radial direction of the shell to adjust the left and right position of the second box frame assembly.

7. The main machine structure of the full-size pipeline pressure tensile test equipment according to any one of claims 1 to 3 is characterized in that: The top column assembly includes a top column, a top column end and a fixing member; The top column end caps are disposed at both ends of the top column, the top column end cap at the first end is used to be connected to the corresponding hydraulic cylinder, and the top column end cap at the second end is fixedly connected to the second box frame assembly via the fixing member.

8. The main machine structure of the full-size pipeline pressure tensile test equipment according to any one of claims 1 to 3, characterized in that: The top column assembly includes a top column group, a top column end and a fixing member, and the top column group includes at least two top columns connected in pairs; Both ends of each top column are provided with the top column end head, and each top column is fixed with the corresponding top column end head by the fixing member to achieve connection; wherein, The top column end head at the first end of the top column near the hydraulic cylinder side in the top column group is used to be connected to the corresponding hydraulic cylinder, and the top column end head at the second end of the top column near the second box frame assembly side in the top column group is fixedly connected to the second box frame assembly through the fixing member.

9. The main machine structure of the full-size pipeline pressure tensile test equipment according to any one of claims 1 to 3, characterized in that: The host structure also includes a plurality of force sensing units; The force sensing unit is located between the corresponding top column assembly and the hydraulic cylinder, and one end of the force sensing unit is connected to the first end of the corresponding top column assembly, and the other end of the force sensing unit is connected to the corresponding hydraulic cylinder.

10. The main machine structure of the full-size pipeline pressure tensile test equipment according to any one of claims 1 to 3, characterized in that: The main machine structure also includes a moving track and a plurality of hydraulic cylinder supports; The first movable base and the second movable base are slidably connected to the movable track, one end of the hydraulic cylinder bracket is supported on the corresponding hydraulic cylinder, and the other end of the hydraulic cylinder bracket is fixed to the first movable base.

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