A device for testing the strength of a concrete product

Abstract

The present application relates to the technical field of concrete product strength testing, in particular to a concrete product strength testing device, which comprises: an inner pressure mechanism and an outer pressure mechanism are jointly arranged on a testing table, and an equal pressure mechanism is arranged on the outer pressure mechanism; the device can sequentially or as needed perform inner pressure and outer pressure testing of a concrete pipeline on the same equipment, without moving the pipeline body during the testing process; while meeting the requirements of inner and outer pressure testing specified in the national standard, the device can also adapt to pipelines with different diameters; the device can also simulate the complex stress state of the pipeline after being buried, in which the pipeline is subjected to uniform multi-point pressure from the external soil, and the pressure of each loading point can be independently adjusted according to the actual working condition requirements; meanwhile, the device can also realize collaborative loading testing with the inner pressure testing of the pipeline, so as to highly restore the composite stress condition of the pipeline in the actual working process, in which the pipeline simultaneously bears the internal fluid pressure and the external complex soil constraint.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete product strength testing, in particular to a concrete product strength testing device. BACKGROUND

[0002] Concrete products are prefabricated products with specific shapes and functions made of cement, aggregate and water as main raw materials through a series of processes such as mixing, molding and curing. Concrete tubular products are widely used in infrastructure fields such as sewage discharge, water supply and other infrastructure fields, and are important components of urban underground pipe networks. In order to ensure their long-term reliable operation, the key strength indicators such as the external pressure bearing capacity and the internal pressure bearing capacity of the concrete pipe need to be tested before being put into actual use or delivered from the factory, in order to verify their structural safety and applicability.

[0003] In the prior art, when testing the internal and external pressure strength of the concrete pipe, the internal pressure of the concrete pipe with both ends sealed is generally filled with water and pressurized, and the pressure is maintained within a specified time to test the ability of the pipe to resist the action of the internal fluid and ensure that it does not leak or structurally burst under service conditions. At the same time, the external pressure bearing capacity of the concrete pipe is tested by the flat plate method, i.e. two hard parallel flat plates are used to apply load to the pipe body in the up-down direction to detect the overall structural response and bearing performance of the pipe when bearing external uniformly distributed pressure, so as to ensure that it does not crack or break under service conditions, thereby comprehensively verifying its mechanical reliability in the actual buried environment.

[0004] However, the traditional internal and external pressure testing method for concrete pipes has the following problems: 1. In the prior art, internal and external pressure testing needs to be completed on different equipment, and the concrete pipe needs to be repeatedly transferred between stations during testing, which not only reduces the testing efficiency, but also may cause potential damage to the pipe body during handling. When using the flat plate method for external pressure testing, only concentrated load can be applied to the pipe through the upper and lower two flat plates, and the complex mechanical state of the pipe surrounded by backfill soil under actual buried environment cannot be truly simulated, so it is difficult to fully reflect the comprehensive structural performance of the pipe under real working conditions; 2. In the prior art, the internal and external pressure testing processes of the concrete pipe are separated, and it is difficult to achieve synchronous or continuous loading with the same equipment, so the synchronous action of internal pressure loading and external multi-point uniform pressure cannot be achieved, resulting in a significant difference between the test conditions and the complex mechanical environment in which the pipe simultaneously bears the internal fluid pressure and the uniform constraint of the surrounding backfill soil in actual working conditions, so that the test results cannot fully reflect the structural response and potential failure mode of the pipe under real combined load, which may mask the hidden damage and performance abnormalities of the pipe in production or use, thereby weakening the effective evaluation and control ability of the long-term operation risk of the pipe. SUMMARY

[0005] In order to achieve the above object, the present application provides the following technical scheme: a concrete product strength testing device, comprising left-right symmetrical test benches, the test benches are provided with an internal pressure mechanism and an external pressure mechanism, and the external pressure mechanism is provided with an equal pressure mechanism.

[0006] The internal pressure mechanism comprises a horizontal movement centering part arranged on the two test benches and moving left and right to be connected with the concrete pipeline, the horizontal movement centering part is provided with a sealing and pressurizing part for sealing the pipeline end and pressurizing the pipeline interior, and a limiting and supporting part for limiting and supporting the pipeline.

[0007] The external pressure mechanism comprises a supporting and mounting part arranged on the two test benches, the supporting and mounting part is provided with a limiting and centering part for supporting and limiting the pipeline and adjusting the centering, and an external pressure detection part for externally pressurizing the pipeline flat plate method.

[0008] The equal pressure mechanism comprises a moving and adjusting part arranged on the external pressure detection part and adjusting forward and backward, the moving and adjusting part is provided with a close and equal pressure part for closely and equally pressing the pipeline outer side at multiple points, and the moving and adjusting part and the close and equal pressure part are jointly provided with a reinforcing and supporting part for reinforcing and supporting the close and equal pressure part.

[0009] Preferably, the horizontal movement centering part comprises a plurality of guide rods one uniformly and fixedly arranged between the two test benches, the two test benches are fixedly provided with a hydraulic cylinder one on the opposite sides, the hydraulic cylinder one is fixedly provided with a moving frame at the telescopic end, the moving frame is slidably connected with all the guide rods one and moves left and right, the moving frame is rotatably provided with a supporting roller on the upper side through a support one, the moving frame is fixedly provided with an installation plate on the lower end, and the installation plate is rotatably provided with a moving wheel on the side away from the corresponding moving frame.

[0010] Preferably, the sealing and pressurizing part comprises a connecting ring one fixedly arranged on the left side of the right moving frame, a sealing ring one fixedly arranged on the left side of the connecting ring one, a connecting ring two fixedly arranged on the right side of the left moving frame, and a sealing ring two fixedly arranged on the right side of the connecting ring two, wherein the outer diameters of the connecting ring two and the sealing ring two are greater than the outer diameters of the connecting ring one and the sealing ring one respectively, and the left moving frame is provided with a water injection port penetrating left and right and located inside the connecting ring two.

[0011] Preferably, the limiting and supporting part comprises an installation sleeve fixedly arranged on the left side of the right moving frame and located inside the connecting ring one, a gas cylinder one fixedly arranged in the installation sleeve, the telescopic end of the gas cylinder one slidably penetrates the left end of the installation sleeve, a plurality of supporting plates are circumferentially and uniformly arranged on the outer side of the telescopic end of the gas cylinder one and the installation sleeve, a transmission rod one is hingedly connected between the left end of the supporting plate and the telescopic end of the gas cylinder one, and a transmission rod two is hingedly connected between the right section of the supporting plate and the outer side of the installation sleeve and is distributed left and right.

[0012] Preferably, the supporting mounting part comprises a bottom plate arranged between the two moving frames, the upper side of the bottom plate is symmetrically provided with two supporting tables, the upper side of the two supporting tables is commonly provided with a mounting table, and the upper side of the two testing tables is commonly provided with a fixed table located above the supporting roller.

[0013] Preferably, the limiting centering part comprises a hydraulic cylinder two fixedly arranged on the lower side of the mounting table, the telescopic end of the hydraulic cylinder two is fixedly provided with a lifting plate moving up and down, the lifting plate is symmetrically provided with a circular through groove penetrating up and down, the lower side of the lifting plate is uniformly provided with a plurality of guide rods two slidingly connected with the mounting table, and the upper side of the lifting plate is symmetrically provided with an L-shaped limiting table.

[0014] Preferably, the outer pressure detection part comprises a hydraulic cylinder three symmetrically fixedly arranged on the upper side of the fixed table, the telescopic ends of the two hydraulic cylinders three are commonly provided with an upper pressing plate moving up and down, the upper side of the upper pressing plate is uniformly provided with a plurality of guide rods three slidingly connected with the fixed table, the lower side of the mounting table is symmetrically fixedly provided with a hydraulic cylinder four, the telescopic end of the hydraulic cylinder four is slidingly penetrated through the corresponding circular through groove, the telescopic ends of the two hydraulic cylinders four are commonly provided with a lower pressing plate moving up and down and located above the lifting plate, the lower side of the lower pressing plate is uniformly provided with a plurality of guide rods four slidingly connected with the mounting table, and the upper side of the lower pressing plate is symmetrically provided with a rectangular through groove penetrating up and down and allowing the corresponding L-shaped limiting table to slidingly penetrate.

[0015] Preferably, the moving adjusting part comprises two groups of guide rails fixedly arranged on the opposite side of the upper pressing plate and the lower pressing plate, each group is composed of left-right symmetric guide rails, each group of guide rails is commonly provided with a sliding table moving forward and backward, the upper pressing plate and the lower pressing plate are symmetrically fixedly provided with a plurality of air cylinders two, and the telescopic end of the air cylinder two is fixedly connected with the corresponding sliding table.

[0016] Preferably, the fitting uniform pressure part comprises a rotating seat fixedly arranged on the side of the sliding table away from the corresponding air cylinder two, the two rotating seats are commonly provided with a rotating shaft one, the rotating shaft one is rotatably provided with a uniform pressing plate, the side of the sliding table close to the corresponding air cylinder two is symmetrically fixedly provided with a supporting seat, the supporting seat is located on the upper side of the corresponding guide rail, and the supporting seat is rotatably provided with a hydraulic cylinder five having a telescopic end hinged to the corresponding uniform pressing plate.

[0017] Preferably, the reinforcing supporting part comprises a limiting seat fixedly arranged on the upper side of the corresponding sliding table, the limiting seat is provided with a straight slot penetrating left and right and extending forward and backward, the middle part of the uniform pressing plate is rotatably provided with a rotating shaft two penetrating left and right, the rotating shaft two is symmetrically fixedly provided with a connecting rod, the ends of the two connecting rods away from the corresponding rotating shaft two are commonly provided with a connecting shaft, and the opposite sides of the two connecting rods are fixedly provided with a sliding shaft coaxial with the corresponding connecting shaft and slidingly connected with the corresponding straight slot.

[0018] Compared with the prior art, the beneficial effects of the present application are as follows: 1, the inner pressure mechanism, the outer pressure mechanism and the equalizing mechanism cooperate, the inner pressure and the outer pressure test of the concrete pipeline can be performed on demand on the same equipment, the pipeline body does not need to be moved during the detection process, the detection efficiency is low and the pipeline potential damage risk is effectively avoided due to repeated transfer of the station, the detection efficiency and the operation safety are significantly improved, and on the basis of meeting the requirements of the national standard for inner and outer pressure test, different diameters of the pipeline can also be adapted, and the flexibility and practicability of the detection equipment are ensured.

[0019] 2, the inner pressure mechanism, the outer pressure mechanism and the equalizing mechanism cooperate, the complex stress state of the pipeline buried after the external soil is simulated to be uniformly and multi-point pressed, and the pressure of each loading point can be independently adjusted according to the actual working condition requirement, and the inner pressure detection of the pipeline can also be realized to realize the coordinated loading test, so that the composite stress condition that the pipeline simultaneously bears the internal fluid pressure and the external complex soil constraint in the actual working process is highly restored in the test environment, the evaluation accuracy of the structural state and the potential failure mode of the pipeline in the real service environment is greatly improved, and a more reliable technical basis for comprehensively controlling the quality and long-term operation risk of the concrete pipeline product is provided. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present application.

[0021] Figure 2 It is a structural side view sectional view schematic diagram of the present application.

[0022] Figure 3 It is a partial sectional view schematic diagram of the inner pressure mechanism part structure.

[0023] Figure 4 It is a partial sectional view schematic diagram of the sealing and pressurizing part structure.

[0024] Figure 5 It is a partial sectional view schematic diagram of the outer pressure mechanism part structure.

[0025] Figure 6 It is a partial sectional view schematic diagram of the outer pressure mechanism part structure.

[0026] Figure 7 It is a partial sectional view schematic diagram of the outer pressure mechanism part structure.

[0027] Figure 8 It is a partial sectional view schematic diagram of the outer pressure mechanism part structure.

[0028] Figure 9 It is a partial sectional view schematic diagram of the outer pressure mechanism part structure.

[0029] Figure 10 It is a partial sectional view schematic diagram of the outer pressure mechanism part structure.

[0030] Fig. 1, test bench; 2, internal pressure mechanism; 21, horizontal moving centering part; 211, guide rod one; 212, hydraulic cylinder one; 213, moving frame; 214, supporting roller; 215, mounting plate; 216, moving wheel; 22, sealing pressurizing part; 221, abutting ring one; 222, sealing ring one; 223, abutting ring two; 224, sealing ring two; 225, water injection port; 23, limiting internal supporting part; 231, mounting sleeve; 232, air cylinder one; 233, internal supporting plate; 234, transmission rod one; 235, transmission rod two; 3, external pressure mechanism; 31, supporting mounting part; 311, bottom plate; 312, supporting table; 313, mounting table; 314, fixed table; 32, limiting centering part; 321, hydraulic cylinder two; 322, lifting plate; 323, circular through slot; 324, guide rod two; 325, L-shaped limiting table; 33, external pressure detecting part; 331, hydraulic cylinder three; 332, upper pressing plate; 333, guide rod three; 334, hydraulic cylinder four; 335, lower pressing plate; 336, guide rod four; 337, rectangular through slot; 4, equalizing pressure mechanism; 41, moving adjusting part; 411, guide rail; 412, sliding table; 413, air cylinder two; 42, adhering equalizing pressure part; 421, rotating seat; 422, rotating shaft one; 423, equalizing plate; 424, supporting seat; 425, hydraulic cylinder five; 43, reinforcing supporting part; 431, limiting seat; 432, straight slot; 433, rotating shaft two; 434, connecting rod; 435, connecting shaft; 436, sliding shaft. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0032] Please refer to Figure 1 A concrete product strength testing device comprises left-right symmetrically distributed test benches 1, the test benches 1 are provided with an internal pressure mechanism 2 and an external pressure mechanism 3, and the external pressure mechanism 3 is provided with an equalizing pressure mechanism 4.

[0033] Please refer to Figure 1 and Figure 2 The internal pressure mechanism 2 comprises a horizontal moving centering part 21 provided on the two test benches 1 and horizontally moving to abut against a concrete pipeline, a sealing pressurizing part 22 provided on the horizontal moving centering part 21 and sealing an end of the concrete pipeline and pressurizing the inside of the pipeline by water, and a limiting internal supporting part 23 provided on the horizontal moving centering part 21 and limiting the pipeline.

[0034] Please refer to Figure 1 , Figure 2 andFigure 3 The transverse movement centering part 21 comprises a plurality of guide rods 211 fixedly arranged between the two test benches 1, a hydraulic cylinder 212 fixedly arranged on each side of the two test benches 1, a moving frame 213 fixedly arranged at the extension end of the hydraulic cylinder 212 and capable of moving left and right, a supporting roller 214 rotatably arranged on the upper side of the moving frame 213 through a support 1, and a mounting plate 215 fixedly arranged at the lower end of the moving frame 213 and symmetrically arranged front and back, and a moving wheel 216 rotatably arranged on the side of the mounting plate 215 away from the corresponding moving frame 213 and symmetrically arranged left and right.

[0035] The hydraulic cylinder 212 can drive the corresponding moving frame 213 to stably move left and right along the guide rod 211, and the moving wheel 216 on the moving frame 213 can stably support the moving frame 213, so as to reduce the resistance of the moving frame 213 during the movement adjustment and ensure the stability and accuracy of the movement adjustment of the moving frame 213.

[0036] Please refer to Figure 2 , Figure 3 and Figure 4 , the sealing and pressurizing part 22 comprises a butt joint ring 221 fixedly arranged on the left side of the right moving frame 213, a sealing ring 222 fixedly arranged on the left side of the butt joint ring 221, a butt joint ring 223 fixedly arranged on the right side of the left moving frame 213, and a sealing ring 224 fixedly arranged on the right side of the butt joint ring 223, wherein the outer diameters of the butt joint ring 223 and the sealing ring 224 are greater than the outer diameters of the butt joint ring 221 and the sealing ring 222, respectively, and a water injection port 225 is formed on the left moving frame 213 and penetrates left and right and is located inside the butt joint ring 223.

[0037] When the internal pressure test of the concrete pipe is to be performed, the pipe is first stably positioned by the external pressure mechanism 3, and the pipe is adjusted to move up and down to be coaxial with the butt joint ring 221 and the butt joint ring 223, and then the moving frame 213 is driven by the hydraulic cylinder 212 to move left and right until the sealing ring 222 on the butt joint ring 221 is stably and tightly sealed with the socket at the end with smaller diameter of the pipe, and the sealing ring 224 on the butt joint ring 223 is stably and tightly sealed with the socket at the end with larger diameter of the pipe, so as to complete the sealing butt joint of the two ends of the pipe. At this time, water can be injected into the pipe through the water injection port 225 to pressurize the pipe, and the pressure inside the pipe can be monitored in real time by the pressure sensor integrated in the existing water injection equipment (both are not shown in the figure), until the internal pressure of the pipe reaches the standard set value, and the set pressure is maintained within the specified time, while observing whether the pipe leaks or the structure bursts. If the pipe does not leak or the structure does not burst, it meets the internal pressure test standard.

[0038] Please refer to Figure 2 , Figure 3 and Figure 4The limiting inner support part 23 includes a mounting sleeve 231 fixedly arranged on the left side of the right moving frame 213 and located inside the docking ring 221, a gas cylinder 232 is fixedly arranged in the mounting sleeve 231, the telescopic end of the gas cylinder 232 slides through the left end of the mounting sleeve 231, a plurality of inner support plates 233 are uniformly arranged on the outer side of the mounting sleeve 231 and the telescopic end of the gas cylinder 232, a transmission rod 234 is hingedly connected between the left end of the inner support plate 233 and the telescopic end of the gas cylinder 232, and transmission rods 235 are hingedly connected between the right end of the inner support plate 233 and the outer side of the mounting sleeve 231.

[0039] Before the flat method external pressure test of the concrete pipeline is performed by the external pressure mechanism 3, the sealing ring 222 and the sealing ring 224 are driven by the moving frame 213 to press the two ends of the pipeline, the mounting sleeve 231 is synchronously moved into the inside of the pipeline spout end, then the telescopic end of the gas cylinder 232 is moved to the left, the corresponding inner support plate 233 is driven by the transmission rod 234 to move away from the mounting sleeve 231, the transmission rod 235 is synchronously adjusted and the right end of the corresponding inner support plate 233 is stably supported and reinforced, until the inner support plate 233 is stably attached to the inner surface of the pipeline, so that the pipeline is stably limited, so as to ensure that the pipeline does not deviate left and right when the external pressure mechanism 3 performs the flat method external pressure test on the concrete pipeline, thereby ensuring the stability and accuracy of the external pressure test.

[0040] Please refer to Figure 1 and Figure 2 , the external pressure mechanism 3 includes a supporting installation part 31 arranged on the two test benches 1, the supporting installation part 31 is provided with a limiting centering part 32 for supporting and limiting the pipeline and adjusting the centering, and an external pressure detection part 33 for performing the flat method external pressure test on the pipeline.

[0041] Please refer to Figure 1 , Figure 2 and Figure 5 , the supporting installation part 31 includes a bottom plate 311 arranged between the two moving frames 213, the bottom plate 311 is fixedly provided with a support table 312 on the upper side and symmetrically arranged front and back, the two support tables 312 are fixedly provided with a mounting table 313 on the upper side, and the two test benches 1 are fixedly provided with a fixed table 314 above the supporting rollers 214.

[0042] Please refer to Figure 5 , Figure 6 and Figure 7The limiting centering portion 32 comprises a hydraulic cylinder two 321 fixedly arranged on the lower side of the mounting table 313, a lifting plate 322 moving up and down is fixedly arranged on the telescopic end of the hydraulic cylinder two 321, a circular through slot 323 is symmetrically arranged on the lifting plate 322, a plurality of guide rods two 324 are fixedly arranged on the lower side of the lifting plate 322 and are slidably connected with the mounting table 313, and an L-shaped limiting table 325 is symmetrically fixedly arranged on the upper side of the lifting plate 322.

[0043] Please refer to Figure 5 、 Figure 6 and Figure 8 , the outer pressure detection portion 33 comprises a hydraulic cylinder three 331 symmetrically fixedly arranged on the upper side of the fixed table 314, an upper pressing plate 332 moving up and down is fixedly arranged on the telescopic end of the two hydraulic cylinders three 331, a plurality of guide rods three 333 are fixedly arranged on the upper side of the upper pressing plate 332 and are slidably connected with the fixed table 314, a hydraulic cylinder four 334 is fixedly arranged on the lower side of the mounting table 313 and slides up and down through the corresponding circular through slot 323, a lower pressing plate 335 moving up and down is fixedly arranged on the telescopic end of the two hydraulic cylinders four 334 and is located above the lifting plate 322, a plurality of guide rods four 336 are fixedly arranged on the lower side of the lower pressing plate 335 and are slidably connected with the mounting table 313, and a rectangular through slot 337 is symmetrically arranged on the lower pressing plate 335 and slides up and down through the corresponding L-shaped limiting table 325.

[0044] When the concrete pipe is to be limited and supported, the lifting plate 322 is driven by the hydraulic cylinder two 321 to move upwards until the lifting plate 322 is attached to the lower surface of the lower pressing plate 335 and the L-shaped limiting table 325 is completely extended from the corresponding rectangular through slot 337, and then the concrete pipe to be detected is placed between the two L-shaped limiting tables 325, so that the two L-shaped limiting tables 325 stably limit and support the concrete pipe.

[0045] When the limited concrete pipe is to be moved up and down, the L-shaped limiting table 325 and the lower pressing plate 335 are driven by the hydraulic cylinder two 321 and the hydraulic cylinder four 334 to move up and down, respectively, and the concrete pipe stably limited by the L-shaped limiting table 325 is synchronously moved up and down, until the pipe is coaxially adjusted with the butt joint ring one 221 and the butt joint ring two 223, so that the pipes with different diameters and coaxial positions can be tested for internal and external pressure.

[0046] When the concrete pipe is to be tested by the flat method external pressure test, the inner support plate 233 is first driven by the air cylinder 232 to stabilize and limit the pipe, then the upper pressing plate 332 is driven by the hydraulic cylinder three 331 to move downward and press tightly on the upper side of the pipe, and the lower pressing plate 335 is driven by the hydraulic cylinder four 334 to move upward and press tightly on the lower side of the pipe at the same time, and the L-shaped limiting table 325 is driven by the hydraulic cylinder two 321 to move downward by a small distance until it no longer supports the pipe. At this time, the pipe is continuously subjected to synchronous load by the upper pressing plate 332 and the lower pressing plate 335, and the load size is monitored in real time by the pressure sensor (not shown in the figure) integrated in the upper pressing plate 332 and the lower pressing plate 335, until the applied load reaches the standard set value, and the pipe is continuously observed for cracking or breaking. If the pipe does not crack or break, it meets the flat method external pressure test standard.

[0047] The above operation mode can be realized on the same device to perform the internal and external pressure test of the concrete pipe as needed, without moving the pipe body during detection, effectively avoiding the low detection efficiency and potential damage risk of the pipe caused by repeated transfer of the station, significantly improving the detection efficiency and operation safety, while meeting the requirements of the standard internal and external pressure test, it can also adapt to pipes of different diameters, ensuring the flexibility and practicality of the detection equipment.

[0048] Please refer to Figure 1 and Figure 9 , the equalizing mechanism 4 includes a moving adjusting part 41 arranged on the outer pressure detection part 33 and moving forward and backward to adjust, the moving adjusting part 41 is provided with a fitting equalizing part 42 which uniformly fits and multi-point presses the outer side of the pipe, and the moving adjusting part 41 and the fitting equalizing part 42 are jointly provided with a reinforcing support part 43 which stably supports and reinforces the fitting equalizing part 42.

[0049] Please refer to Figure 1 , Figure 9 and Figure 10 , the moving adjusting part 41 includes two groups of guide rails 411 which are symmetrically fixed on the opposite sides of the upper pressing plate 332 and the lower pressing plate 335, each group is composed of left and right symmetric guide rails 411, and each group of guide rails 411 is jointly provided with a sliding table 412 which moves forward and backward, the upper pressing plate 332 and the lower pressing plate 335 are symmetrically fixed with air cylinder two 413 on the front and back, and the extension end of the air cylinder two 413 is fixedly connected with the corresponding sliding table 412.

[0050] Please refer to Figure 1 , Figure 9 and Figure 10The fitting uniform pressure part 42 comprises rotation seats 421 fixed symmetrically left and right on the sliding table 412 away from the corresponding cylinder two 413, a rotation shaft one 422 fixedly arranged between the two rotation seats 421, a uniform pressure plate 423 rotatably arranged on the rotation shaft one 422, support seats 424 fixed symmetrically left and right on the sliding table 412 close to the corresponding cylinder two 413, the support seats 424 being located on the upper side of the corresponding guide rail 411, and hydraulic cylinders five 425 rotatably arranged on the support seats 424 and hinged to the corresponding uniform pressure plates 423.

[0051] When the uniform pressure plate 423 is required to be fitted and pressed on the pipeline at a required position, the corresponding sliding table 412 and the uniform pressure plate 423 are moved forward and backward along the guide rail 411 by the cylinder two 413, and the corresponding uniform pressure plate 423 is rotated around the rotation shaft one 422 toward the pipeline by the hydraulic cylinder five 425, until the side of the uniform pressure plate 423 away from the corresponding hydraulic cylinder five 425 is in contact with the pipeline and is extruded, and meanwhile, the uniform pressure plate 423 can be synchronously moved forward and backward and adjusted in the rotation angle, so that the uniform pressure plate 423 can be stably fitted and pressed on the pipeline at the required position, and the uniform pressure plate 423 can also stably adapt to pipelines with different diameters, and the stable support of the hydraulic cylinder five 425 to the uniform pressure plate 423 and the stable pressing of the uniform pressure plate 423 to the pipeline can be ensured by the support of the guide rail 411 to the corresponding support seat 424.

[0052] Please refer to Figure 9 and Figure 10 The reinforcing support part 43 comprises limiting seats 431 fixed symmetrically left and right on the upper side of the corresponding sliding table 412, straight grooves 432 extending forward and backward and penetrating left and right are formed in the limiting seats 431, rotation shafts two 433 penetrating left and right are rotatably arranged in the middle of the uniform pressure plate 423, connecting rods 434 are fixed symmetrically left and right on the rotation shafts two 433, connecting shafts 435 are fixedly arranged at the ends of the two connecting rods 434 away from the corresponding rotation shafts two 433, and slide shafts 436 are fixed on the opposite sides of the two connecting rods 434 and are coaxial with the corresponding connecting shafts 435 and are in sliding connection with the corresponding straight grooves 432.

[0053] When the rotation angle of the uniform pressure plate 423 is adjusted, the uniform pressure plate 423 drives the corresponding rotation shaft two 433 to synchronously rotate and adjust, the rotation shaft two 433 drives the connecting shaft 435 and the slide shaft 436 to synchronously adjust through the corresponding connecting rod 434, and the slide shaft 436 synchronously moves forward and backward along the corresponding straight groove 432, so that the rotation shaft two 433, the connecting rod 434, the connecting shaft 435 and the slide shaft 436 provide reinforcing support for the uniform pressure plate 423 with the rotation adjustment angle, so as to prevent the uniform pressure plate 423 from deforming during loading and ensure the stability of the uniform pressure plate 423 during working.

[0054] When uniform multi-point pressure is to be applied to the outer side of the pipeline, the outer plate method is first used to apply pressure to the pipeline through the upper pressing plate 332 and the lower pressing plate 335, and then the uniform pressure plate 423 is adjusted to synchronously apply the same or different loads to the required positions on the outer side of the pipeline, so that the uniform multi-point pressure is applied to the outer side of the pipeline through the cooperation of the upper pressing plate 332, the lower pressing plate 335 and the uniform pressure plates 423, and the loading pressure can be independently adjusted according to the requirements, and the size of the applied load is monitored in real time through the pressure sensors (not shown in the figure) integrated in the upper pressing plate 332, the lower pressing plate 335 and the uniform pressure plates 423, until the corresponding load reaches the required size, and the cracking or breaking of the pipeline is continuously observed, so as to simulate the complex stress state of the pipeline after being buried under the uniform multi-point pressure of the external soil.

[0055] When the uniform multi-point pressure is applied to the outer side of the pipeline, the inner pressure mechanism 2 can be used to synchronously pressurize the pipeline through water filling, so as to simulate the combined stress condition of the pipeline under the internal fluid pressure and the external complex soil constraint in the actual working process.

[0056] The above operation mode can simulate the complex stress state of the pipeline after being buried under the uniform multi-point pressure of the external soil, and the pressure of each loading point can be independently adjusted according to the actual working condition requirements, and the pipeline internal pressure detection can be simultaneously loaded and tested, so as to highly restore the combined stress condition of the pipeline under the internal fluid pressure and the external complex soil constraint in the actual working process in the test environment, greatly improve the evaluation accuracy of the structural state and potential failure mode of the pipeline in the real service environment, and provide a more reliable technical basis for comprehensively controlling the quality and long-term operation risk of the concrete pipeline product.

[0057] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0058] In addition, the terms "first", "second", "one", "two" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined with "first", "second", "one", "two" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0059] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0060] The embodiments of the specific implementation are the preferred embodiments of the present application, and are not limited to the protection scope of the present application. Therefore, any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A concrete product strength testing apparatus comprising a left-right symmetrical testing table, characterized in that: The test bench is provided with an internal pressure mechanism and an external pressure mechanism, and the external pressure mechanism is provided with an equalizing mechanism; The internal pressure mechanism comprises a horizontal moving centering part provided on the two test benches and moving left and right to be connected with the concrete pipeline, a sealing and pressurizing part provided on the horizontal moving centering part and sealing the end of the pipeline and pressurizing the inside of the pipeline, and a limiting internal supporting part limiting the pipeline; The external pressure mechanism comprises a supporting and installing part provided on the two test benches, a limiting and centering part provided on the supporting and installing part and limiting and centering the pipeline, and an external pressure detecting part pressurizing the pipeline by the flat method; The equalizing mechanism comprises a moving and adjusting part provided on the external pressure detecting part and adjusting forward and backward, a close and equalizing part provided on the moving and adjusting part and closely and equally pressing the outside of the pipeline, and a reinforcing and supporting part provided on the moving and adjusting part and the close and equalizing part and reinforcing and supporting the close and equalizing part; The internal and external pressure of the concrete pipeline is tested by the internal pressure mechanism and the external pressure mechanism respectively, and the internal fluid pressure and the external multi-point pressure are synchronously applied to the pipeline by the equalizing mechanism, the internal pressure mechanism and the external pressure mechanism, so as to restore the composite pressure of the pipeline in actual work; The external pressure detecting part comprises an upper pressing plate and a lower pressing plate which can move up and down; The moving and adjusting part comprises two groups of guide rails which are symmetrically and fixedly arranged on the opposite side of the upper pressing plate and the lower pressing plate, each group of guide rails is composed of left and right symmetric guide rails, each group of guide rails is provided with a sliding table which moves forward and backward and is symmetrically and slidably arranged on the guide rails, the upper pressing plate and the lower pressing plate are symmetrically and fixedly provided with a plurality of air cylinders two, and the extension end of the air cylinder two is fixedly connected with the corresponding sliding table; The close and equalizing part comprises two rotating seats which are symmetrically and fixedly arranged on the side of the sliding table away from the corresponding air cylinder two, a rotating shaft one is fixedly arranged between the two rotating seats, an equalizing plate is rotatably arranged on the rotating shaft one, a supporting seat is symmetrically and fixedly arranged on the side of the sliding table close to the corresponding air cylinder two, the supporting seat is located on the upper side of the corresponding guide rail, and a hydraulic cylinder five is rotatably arranged on the supporting seat and is hingedly connected with the corresponding equalizing plate; The horizontal moving and centering part comprises a plurality of guide rods one which are uniformly and fixedly arranged between the two test benches, a hydraulic cylinder one is fixedly arranged on the side away from the other side of the two test benches, the extension end of the hydraulic cylinder one is fixedly connected with a moving frame which moves left and right and is slidably connected with all the guide rods one, a supporting roller is rotatably arranged on the upper side of the moving frame through a support one, an installing plate is symmetrically and fixedly arranged on the lower end of the moving frame, and a moving wheel is symmetrically and rotatably arranged on the side of the installing plate away from the corresponding moving frame; The supporting and installing part comprises a bottom plate provided between the two moving frames, a supporting table is symmetrically and fixedly arranged on the upper side of the bottom plate, an installing table is fixedly arranged on the upper side of the two supporting tables, and a fixed table is fixedly arranged on the upper side of the two test benches and is located above the supporting roller; The limiting and centering part comprises a hydraulic cylinder two fixedly arranged on the lower side of the installing table, a lifting plate which moves up and down is fixedly arranged on the extension end of the hydraulic cylinder two, a circular through slot is symmetrically and fixedly arranged on the lifting plate, a plurality of guide rods two which are slidably connected with the installing table are uniformly and fixedly arranged on the lower side of the lifting plate, and an L-shaped limiting table is symmetrically and fixedly arranged on the upper side of the lifting plate; The lower side of the installation table is fixedly provided with left-right symmetrical hydraulic cylinders four penetrating corresponding circular through grooves through sliding up and down, the extension ends of the two hydraulic cylinders four are fixedly provided with a pressing plate moving up and down and located above the lifting plate, the lower side of the pressing plate is uniformly fixedly provided with a plurality of guide rods four in sliding connection with the installation table, and the pressing plate is symmetrically provided with a rectangular through groove penetrating up and down and allowing the corresponding L-shaped limiting table to slide up and down.

2. A device for testing the strength of a concrete product according to claim 1, characterized in that: The sealing pressurizing part comprises a butt joint ring one fixedly arranged on the left side of the left moving frame, a sealing ring one fixedly arranged on the left side of the butt joint ring one, a butt joint ring two fixedly arranged on the right side of the left moving frame, and a sealing ring two fixedly arranged on the right side of the butt joint ring two, wherein the outer diameters of the butt joint ring two and the sealing ring two are greater than the outer diameters of the butt joint ring one and the sealing ring one, and a water injection port penetrating left and right and located inside the butt joint ring two is arranged on the left moving frame.

3. A device for testing the strength of a concrete product as defined in claim 2, wherein: The limiting inner support part comprises a mounting sleeve fixedly arranged on the left side of the right moving frame and located inside the butt joint ring one, a gas cylinder one fixedly arranged in the mounting sleeve, the extension end of the gas cylinder one sliding through the left end of the mounting sleeve left and right, a plurality of inner support plates circumferentially and uniformly arranged on the outer side of the extension end of the gas cylinder one and the mounting sleeve, a transmission rod one hingedly connected between the left end of the inner support plate and the extension end of the gas cylinder one, and left-right distributed transmission rods two hingedly connected between the right end of the inner support plate and the outer side of the mounting sleeve.

4. A device for testing the strength of a concrete product as defined in claim 3, characterized in that: The outer pressure detection part further comprises left-right symmetrical hydraulic cylinders three fixedly arranged on the upper side of the fixed table, the extension ends of the two hydraulic cylinders three are fixedly provided with an upper pressing plate moving up and down, and the upper side of the upper pressing plate is uniformly fixedly provided with a plurality of guide rods three in sliding connection with the fixed table.

5. The apparatus of claim 1 wherein: The reinforcing support part comprises left-right symmetrical limiting seats fixedly arranged on the upper side of the corresponding sliding table, linear grooves penetrating left and right and extending forward and backward are arranged on the limiting seat, a rotating shaft two penetrating left and right is rotatably arranged on the middle part of the pressing plate, left-right symmetrical connecting rods are fixedly arranged on the rotating shaft two, the ends of the two connecting rods away from the corresponding rotating shaft two are fixedly provided with a connecting shaft, and the opposite sides of the two connecting rods are fixedly provided with sliding shafts coaxial with the corresponding connecting shafts and in sliding connection with the corresponding linear grooves.

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