CN218896079U - Flame combustion device and test system for hot-rolled H-shaped steel weldability test - Google Patents
Flame combustion device and test system for hot-rolled H-shaped steel weldability test Download PDFInfo
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- CN218896079U CN218896079U CN202222250321.XU CN202222250321U CN218896079U CN 218896079 U CN218896079 U CN 218896079U CN 202222250321 U CN202222250321 U CN 202222250321U CN 218896079 U CN218896079 U CN 218896079U
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Abstract
The utility model discloses a flame combustion device and a flame combustion system for a hot-rolled H-shaped steel welding property test, which belong to the field of hot-rolled H-shaped steel welding property tests, and comprise a cylindrical combustion box body formed by buckling two groups of semi-cylindrical combustion box bodies and more than two burner assemblies uniformly distributed on the outer circumferential side wall of the cylindrical combustion box body; an accommodating space for accommodating the I-shaped steel member is formed at the position of the middle axis of the cylindrical combustion box body. The cylindrical combustion box formed by buckling the two groups of semi-cylindrical combustion box bodies is arranged on the side face of the I-shaped steel component, enough space is reserved for the design of the fixing and moving assembly of the hot-rolled H-shaped steel on the upper and lower parts of the I-shaped steel component under the condition that a large heat exchange area is reserved between the two groups of semi-cylindrical combustion box bodies and the I-shaped steel component, so that the welding test of the structural component in the fire disaster environment can be simulated during an earthquake, the position design of the structure of the flame combustion device on the I-shaped steel component is simple and reasonable, and the operability is strong.
Description
Technical Field
The utility model relates to the field of hot-rolled H-shaped steel welding performance tests, in particular to a flame combustion device and a test system for a hot-rolled H-shaped steel welding performance test.
Background
The hot rolled H-shaped steel is widely applied to important place buildings such as factory building beam columns, high-rise buildings, station airports and the like, and is called as a contemporary green steel building.
Harmful elements such as sulfur, phosphorus and the like in the hot rolled H-shaped steel belong to eutectic substances with low melting points, and generate cracks at the end of crystallization under the action of larger thermal stress during welding; and defects such as inclusions exist in the process of tapping steel from a converter and casting blanks of a continuous casting machine in steelmaking, and after the steel is rolled into H-shaped steel, a crack source is formed, so that welding cracks are formed, the fatigue resistance of the steel in the service period is reduced, the welded steel structure is collapsed, and disastrous safety accidents are caused.
The weldability refers to the ability of a steel material to be welded into a member according to a predetermined requirement under a limited construction condition and to meet a rated predetermined operation requirement, and a test for evaluating a base material is called a weldability test.
The weldability test mainly comprises a unidirectional stretching test method, a compressive test method, a residual stress detection method, an impact test method, a bending test method, a fatigue test method, a mechanical behavior SEM in-situ test under a small scale and the like, and can be used for testing the weldability of the steel materials.
The direct test method of weldability is aimed at the most common and most harmful crack defects of steel in welding, and can be judged by cracks occurring after welding.
The welding test is carried out after the welding of the existing steel member welded by the hot rolled H-shaped steel is finished and the steel member is required to be processed into a refined sample, complicated procedures such as sampling and sample preparation are required, the welding test of the most direct and most reliable actual welded structure of the hot rolled H-shaped steel cannot be realized, the vertical stretching and compression test can only be carried out, the oblique alternating load stretching of the structural member during an earthquake cannot be simulated, and the welding test of the structural member under the fire disaster environment of the earthquake cannot be simulated, so that the problem that the welding evaluation of the steel member is incomplete and inaccurate exists.
In view of this, the present inventors have made intensive studies to address this need, and have made the present utility model.
Disclosure of Invention
In order to overcome the defects that in the prior art, a steel component welded by hot-rolled H-shaped steel cannot be directly tested, complicated procedures such as sampling, sample preparation and the like are required, oblique alternating load stretching of a structural component cannot be simulated in the earthquake, and the welding property test of the structural component cannot be simulated in the fire disaster environment in the earthquake, the problem that the welding property evaluation of the steel component is incomplete and inaccurate exists, the utility model provides a flame combustion device for the welding property test of the hot-rolled H-shaped steel, which comprises a cylindrical combustion box body formed by buckling two groups of semi-cylindrical combustion box bodies and more than two burner assemblies uniformly distributed on the outer circumferential side wall of the cylindrical combustion box body; and an accommodating space for accommodating the I-shaped steel member is formed at the middle axis position of the cylindrical combustion box body.
The cylindrical combustion box formed by buckling the two groups of semi-cylindrical combustion box bodies is arranged on the side face of the I-shaped steel component, enough space is reserved for the design of the fixing and moving assembly of the hot-rolled H-shaped steel on the upper and lower parts of the I-shaped steel component under the condition that a large heat exchange area is reserved between the two groups of semi-cylindrical combustion box bodies and the I-shaped steel component, so that the welding test of the structural component in the fire disaster environment can be simulated during an earthquake, the position design of the structure of the flame combustion device on the I-shaped steel component is simple and reasonable, and the operability is strong.
Preferably, the burner assembly comprises a natural gas inlet, an air inlet and a burner auto-igniter, the burner auto-igniter being disposed near the intersection of the natural gas inlet and the air inlet; the natural gas inlet is provided with a natural gas regulating valve, and the air inlet is provided with an air inlet valve; the natural gas inlet air inlet direction is parallel to the axis direction of the cylindrical combustion box body, and the air inlet direction is positioned on a tangent line of the position of the burner assembly on the side wall of the cylindrical combustion box body. The number of burner assemblies is preferably 4, and the burner assemblies are uniformly distributed on the side wall of the cylindrical combustion box body along the circumferential direction of the cylindrical combustion box body.
Preferably, the natural gas inlet is connected with a natural gas supply assembly, the natural gas supply assembly comprises a natural gas storage tank and a tangential natural gas burner, and the natural gas regulating valve is arranged at the middle position of the tangential natural gas burner and the natural gas storage tank; the air inlet is connected with a blower.
Preferably, the semi-cylindrical combustion box body comprises a combustion box shell, a refractory insulating brick layer and a refractory castable layer from outside to inside in sequence, wherein the side wall of the semi-cylindrical combustion box body is far away from the accommodating space, and the combustion box shell is made of 5 mm stainless steel.
Preferably, a heat insulation blanket is arranged between the refractory insulating brick layer and the combustion box shell, and/or a heat insulation blanket is arranged between the refractory insulating brick layer and the refractory castable layer.
Preferably, the gas turbine combustion chamber further comprises a temperature control system, the temperature control system comprises a control center and a platinum-rhodium thermocouple temperature measuring assembly, the platinum-rhodium thermocouple temperature measuring assembly is arranged on one side, close to the accommodating space, of the semi-cylindrical combustion chamber body, the output end of the platinum-rhodium thermocouple temperature measuring assembly is connected with the input end of the control center, and the input end of the control center is connected with the natural gas regulating valve and the air inlet valve.
Preferably, the air draft hood assembly comprises an air draft hood, an induced draft fan and a chimney, wherein the air draft hood is arranged right above the accommodating space, and the induced draft fan is arranged between the air draft hood and the chimney.
Preferably, two groups of semi-cylindrical combustion boxes are in butt joint buckling arrangement on one side of the accommodating space to form a cuboid accommodating space penetrating up and down, and two groups of semi-cylindrical combustion boxes are provided with combustion box butt joint buckling pieces in butt joint buckling mutually on one side of the accommodating space.
Preferably, each group of semi-cylindrical combustion box bodies is provided with a second hoisting mobile trolley, a second box body lifting hook is arranged on each semi-cylindrical combustion box body, and the semi-cylindrical combustion box bodies are hoisted on the second hoisting mobile trolley through the second box body lifting hooks.
The utility model also provides a hot rolled H-shaped steel weldability test system which comprises the flame combustion device.
Preferably, the weldability test system further comprises a frame, an upper sample fastening assembly and a lower sample fastening assembly for fastening the upper and lower hot rolled H-section steel in the i-section steel member, respectively, a horizontal moving assembly for applying a force along the length direction of the upper and lower hot rolled H-section steel in the i-section steel member to the upper sample fastening assembly and/or the lower sample fastening assembly, and an up-down moving assembly for applying a force in the vertical direction to the upper sample fastening assembly and/or the lower sample fastening assembly;
the up-down moving assembly and/or the horizontal moving assembly are/is fixedly arranged in the frame body, and the upper sample fastening assembly and/or the lower sample fastening assembly are/is fixedly arranged at the output end of the up-down moving assembly and/or the horizontal moving assembly.
The upper sample fastening assembly and the lower sample fastening assembly are adopted to fix the upper hot rolled H-shaped steel and the lower hot rolled H-shaped steel of the I-shaped steel component, then the horizontal moving assembly is utilized to apply horizontal force to the upper hot rolled H-shaped steel and the lower hot rolled H-shaped steel, the vertical pressure or tensile load is applied to the upper hot rolled H-shaped steel and the lower hot rolled H-shaped steel by the upper moving assembly and the lower moving assembly, and the purpose of obliquely alternately stretching the structural component in the earthquake simulation process is achieved by cooperation between the horizontal moving assembly and the upper moving assembly and the lower moving assembly.
Preferably, the up-down moving assembly is fixedly installed in the frame, the horizontal moving assembly is fixedly installed at the output end of the up-down moving assembly, and the upper sample fastening assembly and/or the lower sample fastening assembly is fixedly installed at the output end of the horizontal moving assembly. Here, the horizontal movement assembly may be provided with one, i.e., only the upper sample fastening assembly or the lower sample fastening assembly is controlled; two sample fastening components and a lower sample fastening component can be respectively controlled, and the two modes can realize that the upper and lower hot rolled H-shaped steel of the I-shaped steel component are subjected to dislocation load in the horizontal direction.
Preferably, the upper sample fastening assembly comprises an upper sliding plate, an upper fastening hydraulic cylinder, an upper fastening rod and an upper fastening shoulder pole, wherein the upper sliding plate is propped against the upper surface of the hot rolled H-shaped steel at the middle upper part of the I-shaped steel member, and the four upper fastening hydraulic cylinders are fixedly arranged at the end parts of the two side edges of the hot rolled H-shaped steel at the middle upper part of the I-shaped steel member on the upper sliding plate;
preferably, a cooling blower is arranged on the frame body and used for blowing and cooling an upper sliding plate and a tensioning hydraulic cylinder in the test system.
An upper fastening rod which extends downwards to the lower parts of the two sides of the hot rolled H-shaped steel at the upper middle part of the I-shaped steel member is fixedly arranged at the movable end of each upper fastening hydraulic cylinder; the two ends of the upper fastening shoulder pole are fixedly arranged at the lower end parts of the two upper fastening rods, which are close to the same end parts on the two side edges of the hot rolled H-shaped steel at the middle upper part of the I-shaped steel member, and the upper surface of the upper fastening shoulder pole is propped against the lower surface of the hot rolled H-shaped steel at the middle upper part of the I-shaped steel member;
the lower sample fastening assembly comprises a lower sliding plate, a lower fastening hydraulic cylinder, a lower fastening rod and a lower fastening shoulder pole, wherein the lower sliding plate is propped against the lower surface of the hot rolled H-shaped steel at the middle lower part of the I-shaped steel member, and the four lower fastening hydraulic cylinders are fixedly arranged at the end parts of the two side edges of the hot rolled H-shaped steel at the middle lower part of the I-shaped steel member on the lower sliding plate;
a lower fastening rod which extends upwards to the upper side edges of the two sides of the hot rolled H-shaped steel at the middle lower part of the I-shaped steel member is fixedly arranged at the movable end of each lower fastening hydraulic cylinder; the two ends of the lower fastening shoulder pole are fixedly arranged at the upper end parts of the two lower fastening rods, which are close to the same end parts on the two sides of the hot rolled H-shaped steel at the middle lower part of the I-shaped steel component, and the lower surface of the lower fastening shoulder pole is propped against the upper surface of the hot rolled H-shaped steel at the middle lower part of the I-shaped steel component.
Here, the fastening of the upper and lower hot rolled H-section steel in the i-section steel member is achieved by the cooperation of the slide plate, the fastening hydraulic cylinder, the fastening rod and the fastening shoulder pole. The fastening carrying pole is made of high-strength alloy steel, threads are arranged on the outer circumferences of the two ends of the fastening carrying pole, and the fastening carrying pole is fixedly installed on the fastening rod through nuts.
Preferably, fastening holes are formed at the lower end parts of the upper fastening rods, and the two upper fastening carrying poles respectively penetrate through the two fastening holes of the upper fastening rods, which are close to the same end parts on two side edges of the hot rolled H-shaped steel at the upper part of the I-shaped steel member, so as to fasten the hot rolled H-shaped steel at the upper part of the I-shaped steel member;
and fastening holes are formed in the upper end parts of the lower fastening rods, and the two lower fastening carrying poles respectively penetrate through the fastening holes of the lower fastening rods, which are close to the same end part on two side edges of the hot rolled H-shaped steel at the middle lower part of the I-shaped steel member, so that the hot rolled H-shaped steel at the middle lower part of the I-shaped steel member is fastened.
Preferably, a cushion block is arranged between the upper sliding plate and the upper surface of the hot rolled H-shaped steel at the middle upper part of the I-shaped steel member in a cushioning manner; and a cushion block is arranged between the lower sliding plate and the lower surface of the hot rolled H-shaped steel at the middle lower part of the I-shaped steel member in a cushioning manner. The cushion block is a sizing block, the upper fastening rod and the lower fastening rod penetrate through the sizing block, and hot rolled H-shaped steel positioned at the upper part and the lower part is respectively fixed on the upper sliding plate and the lower sliding plate through the fastening shoulder pole.
Preferably, the horizontal moving assembly comprises a guide rail beam and a horizontal hydraulic cylinder, the guide rail beam is installed in the frame body, guide rails are formed on the guide rail beam and at positions corresponding to two sides of the upper sample fastening assembly and/or the lower sample fastening assembly, and the length direction of the guide rails is the same as the length direction of the upper hot-rolled H-shaped steel and the lower hot-rolled H-shaped steel of the I-shaped steel component; the upper sample fastening component and/or the lower sample fastening component are/is arranged on the guide rail beam through the guide rail and can slide along the length direction of the guide rail; the horizontal hydraulic cylinder is fixedly arranged in the guide rail beam or the frame body, the extending and contracting direction of the horizontal hydraulic cylinder is the same as the length direction of the guide rail, and the upper sample fastening assembly and/or the lower sample fastening assembly are/is arranged at the movable end of the horizontal hydraulic cylinder.
Preferably, the horizontal moving assembly comprises an upper horizontal moving assembly for applying force to the upper sample fastening assembly and a lower horizontal moving assembly for applying force to the lower sample fastening assembly, the upper horizontal moving assembly is fixedly installed in the frame, and the lower horizontal moving assembly is installed in the frame through the upper and lower moving assemblies.
Preferably, the up-down moving assembly comprises a moving base and an up-down moving hydraulic cylinder, the lower horizontal moving assembly is fixedly arranged on the moving base, the up-down moving hydraulic cylinder is fixedly arranged in the frame, the moving base is fixedly arranged at the movable end of the up-down moving hydraulic cylinder, and the moving base is slidably arranged on the side wall of the frame. The movable base is designed into a hollow structure and is used for placing a lower fastening hydraulic cylinder arranged below the lower sliding plate, and the movable base simultaneously bears the load of 4 up-and-down movable hydraulic cylinders.
Preferably, a sliding groove is formed on the side wall of the frame body at a position corresponding to the side edge of the movable seat body, and the side edge of the movable seat body is installed in the sliding groove.
Preferably, the frame body comprises a bearing upright post, an upper bearing beam and a lower bearing beam, and the bearing upright post, the upper bearing beam and the lower bearing beam are fixedly connected into a cuboid frame; the up-down moving assembly is fixedly arranged on the lower spandrel girder, and the horizontal moving assembly is arranged on the bearing upright post.
Here, the lower spandrel girder is buried in the underground concrete by 4 anchor bolts.
Preferably, the hydraulic station is characterized by further comprising a hydraulic station, a control center and an electromagnetic control valve group, wherein the output end of the control center is connected with the hydraulic station, and the output end of the hydraulic station is connected with the input ends of the upper fastening hydraulic cylinder, the lower fastening hydraulic cylinder, the horizontal hydraulic cylinder and the up-down moving hydraulic cylinder.
During the test, remove the pedestal and reciprocate in the spout of 4 bearing stands, realize sample structure vertical stretching, go up sample fastening assembly and/or lower sample fastening assembly and drive by horizontal pneumatic cylinder and control the removal in the guide rail roof beam.
The upper sample fastening assembly and the lower sample fastening assembly are driven by respective horizontal hydraulic cylinders to move left and right in the guide rail beam under the action of the dislocation force in the horizontal direction applied to the upper sample fastening assembly and the lower sample fastening assembly, and at the moment, the movement directions of the upper sample fastening assembly and the lower sample fastening assembly are opposite; here, the upper sample fastening assembly can be kept still, and the lower sample fastening assembly is driven to move left and right in the guide rail beam by the horizontal hydraulic cylinder; the lower sample fastening assembly can be kept still, and the upper sample fastening assembly is driven to move left and right in the guide rail beam by the horizontal hydraulic cylinder.
The technical scheme of the utility model has the following beneficial effects:
(1) The cylindrical combustion box formed by buckling the two groups of semi-cylindrical combustion box bodies is arranged on the side face of the I-shaped steel component, enough space is reserved for the design of the fixing and moving assembly of the hot-rolled H-shaped steel on the upper and lower parts of the I-shaped steel component under the condition that a large heat exchange area is reserved between the two groups of semi-cylindrical combustion box bodies and the I-shaped steel component, so that the welding test of the structural component in the fire disaster environment can be simulated during an earthquake, the position design of the structure of the flame combustion device on the I-shaped steel component is simple and reasonable, and the operability is strong.
(2) The upper sample fastening assembly and the lower sample fastening assembly are adopted to fix the upper hot rolled H-shaped steel and the lower hot rolled H-shaped steel of the I-shaped steel component, then the horizontal moving assembly is utilized to apply horizontal force to the upper hot rolled H-shaped steel and the lower hot rolled H-shaped steel, the vertical pressure or tensile load is applied to the upper hot rolled H-shaped steel and the lower hot rolled H-shaped steel by the upper moving assembly and the lower moving assembly, and the purpose of obliquely alternately stretching the structural component in the earthquake simulation process is achieved by cooperation between the horizontal moving assembly and the upper moving assembly and the lower moving assembly.
(3) The upper part and the lower part of the H-shaped steel component are respectively fastened by matching the sliding plate, the fastening hydraulic cylinder, the fastening rod and the fastening shoulder pole.
(4) By simulating oblique alternating load stretching of structural members during an earthquake, the weldability of the hot-rolled H-shaped steel is evaluated, collapse of a high-rise building caused by the problem of the weldability of the hot-rolled H-shaped steel is avoided, and meanwhile test reference data are provided for researching and developing a new variety of hot-rolled H-shaped steel of steel.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic front view of a preferred hot rolled H-section steel weldability testing system of the present utility model;
FIG. 2 is a schematic side view of a preferred hot rolled H-section steel weldability testing system of the present utility model;
FIG. 3 is a diagram showing the structural connection relationship of a hot rolled H-section steel weldability test system according to the present utility model;
FIG. 4 is a schematic top view of a preferred hot rolled H-section steel weldability test refrigeration apparatus of the present utility model;
FIG. 5 is a schematic front view of a refrigeration apparatus for a hot rolled H-section steel weldability test of the present utility model;
FIG. 6 is a schematic side view of a hot rolled H-section steel weldability test refrigeration apparatus of the preferred embodiment of the present utility model;
FIG. 7 is a schematic top view of a flame burner for a hot rolled H-section steel weldability test of the present utility model;
FIG. 8 is a schematic side view of a hot rolled H-section steel weldability test refrigeration apparatus of the preferred embodiment of the present utility model;
FIG. 9 is a schematic view of a preferred suction hood assembly of the present utility model;
FIG. 10 is a schematic view of a preferred lifting mobile cart according to the present utility model;
FIG. 11 is a diagram showing the connection structure of the components of the preferred temperature control system of the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.
As shown in fig. 1 and 2, the hot rolled H-section steel weldability test system includes a frame body 1, an upper sample fastening means 2 and a lower sample fastening means 3 for fastening upper and lower two hot rolled H-section steels 101 in an i-section steel member 100, respectively, a horizontal movement means 4 for applying a force in a longitudinal direction of the upper and lower two hot rolled H-section steels 101 in the i-section steel member 100 to the upper sample fastening means 2 and/or the lower sample fastening means 3, and an up-down movement means 5 for applying a force in a vertical direction to the upper sample fastening means 2 and/or the lower sample fastening means 3;
the up-and-down moving assembly 5 and/or the horizontal moving assembly 4 are/is fixedly arranged in the frame body 1, and the upper sample fastening assembly 2 and/or the lower sample fastening assembly 3 are/is fixedly arranged at the output end of the up-and-down moving assembly 5 and/or the horizontal moving assembly 4.
The upper sample fastening assembly and the lower sample fastening assembly are adopted to fix the upper hot rolled H-shaped steel and the lower hot rolled H-shaped steel of the I-shaped steel component, then the horizontal moving assembly is utilized to apply horizontal force to the upper hot rolled H-shaped steel and the lower hot rolled H-shaped steel, the vertical pressure or tensile load is applied to the upper hot rolled H-shaped steel and the lower hot rolled H-shaped steel by the upper moving assembly and the lower moving assembly, and the purpose of obliquely alternately stretching the structural component in the earthquake simulation process is achieved by cooperation between the horizontal moving assembly and the upper moving assembly and the lower moving assembly.
The up-down moving assembly 5 is fixedly arranged in the frame body 1, the horizontal moving assembly 4 is fixedly arranged at the output end of the up-down moving assembly 5, and the upper sample fastening assembly 2 and/or the lower sample fastening assembly 3 is fixedly arranged at the output end of the horizontal moving assembly 4. Here, the horizontal movement assembly may be provided with one, i.e., only the upper sample fastening assembly or the lower sample fastening assembly is controlled; two sample fastening components and a lower sample fastening component can be respectively controlled, and the two modes can realize that the upper and lower hot rolled H-shaped steel of the I-shaped steel component are subjected to dislocation load in the horizontal direction.
The upper sample fastening assembly 2 comprises an upper sliding plate 21, an upper fastening hydraulic cylinder 22, an upper fastening rod 23 and an upper fastening shoulder pole 24, wherein the upper sliding plate 21 is propped against the upper surface of the hot rolled H-shaped steel 101 at the middle upper part of the I-shaped steel member 100, and four upper fastening hydraulic cylinders 22 are fixedly arranged at the two side end positions of the upper sliding plate 21 on the hot rolled H-shaped steel 101 at the middle upper part of the I-shaped steel member 100;
an upper fastening rod 23 which extends downwards to the lower part of the two side edges of the hot rolled H-shaped steel 101 at the middle upper part of the I-shaped steel member 100 is fixedly arranged at the movable end of each upper fastening hydraulic cylinder 22; the two ends of the upper fastening shoulder pole 24 are fixedly installed at the lower end positions of the two upper fastening rods 23 at the same end part on the two sides of the hot rolled H-shaped steel 101 near the middle upper part of the I-shaped steel member 100, and the upper surface of the upper fastening shoulder pole 24 is propped against the lower surface of the hot rolled H-shaped steel 101 at the middle upper part of the I-shaped steel member 100;
the lower sample fastening assembly 3 comprises a lower sliding plate 31, a lower fastening hydraulic cylinder 32, a lower fastening rod 33 and a lower fastening shoulder pole 34, wherein the lower sliding plate 31 is propped against the lower surface of the hot rolled H-shaped steel 101 at the middle lower part of the I-shaped steel member 100, and four lower fastening hydraulic cylinders 32 are fixedly arranged at the two side end positions of the hot rolled H-shaped steel 101 at the middle lower part of the I-shaped steel member 100 on the lower sliding plate 31;
a lower fastening rod 33 extending upwards to the upper side edges of the two sides of the hot rolled H-shaped steel 101 at the middle lower part of the I-shaped steel member 100 is fixedly arranged at the movable end of each lower fastening hydraulic cylinder 32; the two ends of the lower fastening shoulder pole 34 are fixedly installed at the upper end positions of the two lower fastening rods 33 near the same end parts on the two sides of the hot rolled H-section steel 101 at the middle lower part of the i-section steel member 100, and the lower surface of the lower fastening shoulder pole 34 abuts against the upper surface of the hot rolled H-section steel 101 at the middle lower part of the i-section steel member 100.
Here, the fastening of the upper and lower hot rolled H-section steel in the i-section steel member is achieved by the cooperation of the slide plate, the fastening hydraulic cylinder, the fastening rod and the fastening shoulder pole. The fastening carrying pole is made of high-strength alloy steel, threads are arranged on the outer circumferences of the two ends of the fastening carrying pole, and the fastening carrying pole is fixedly installed on the fastening rod through nuts 35.
The lower end part of the upper fastening rod 23 is provided with fastening holes, and the two upper fastening carrying poles 24 respectively pass through the two fastening holes of the upper fastening rod 23 near the same end part on two side edges of the hot rolled H-shaped steel 101 at the middle upper part of the I-shaped steel member 100 to fasten the hot rolled H-shaped steel 101 at the middle upper part of the I-shaped steel member 100;
the upper end portion of the lower fastening rod 33 is formed with fastening holes, and the two lower fastening shoulder poles 34 respectively pass through the two fastening holes of the lower fastening rod 33 near the same end portion on both sides of the hot rolled H-section steel 101 at the middle lower portion of the i-section steel member 100, so as to fasten the hot rolled H-section steel 101 at the middle lower portion of the i-section steel member 100.
A cushion block 25 is arranged between the upper sliding plate 21 and the upper surface of the hot rolled H-shaped steel 101 at the middle upper part of the I-shaped steel member 100 in a cushioning manner; a cushion block 25 is arranged between the lower slide plate 31 and the lower surface of the hot rolled H-section steel 101 at the middle lower part of the i-section steel member 100. The cushion block is a sizing block, the upper fastening rod and the lower fastening rod penetrate through the sizing block, and hot rolled H-shaped steel positioned at the upper part and the lower part is respectively fixed on the upper sliding plate and the lower sliding plate through the fastening shoulder pole.
The horizontal moving assembly 4 comprises a guide rail beam 41 and a horizontal hydraulic cylinder 42, the guide rail beam 41 is installed in the frame body 1, guide rails (not shown in the figure) are formed on the guide rail beam 41 at positions corresponding to two sides of the upper sample fastening assembly 2 and/or the lower sample fastening assembly 3, and the length direction of the guide rails is the same as the length direction of the upper hot-rolled H-shaped steel 101 and the lower hot-rolled H-shaped steel 101 in the I-shaped steel member 100; the upper sample fastening component 2 and/or the lower sample fastening component 3 are/is arranged on the guide rail beam 41 through the guide rail and can slide along the length direction of the guide rail; the horizontal hydraulic cylinder 42 is fixedly installed in the guide rail beam 41 or the frame body 1, the extending and contracting direction of the horizontal hydraulic cylinder 42 is the same as the length direction of the guide rail, and the upper sample fastening assembly 2 and/or the lower sample fastening assembly 3 are installed at the movable end of the horizontal hydraulic cylinder 42.
The horizontal moving assembly 4 comprises an upper horizontal moving assembly 43 for applying a force to the upper sample fastening assembly 2 and a lower horizontal moving assembly 44 for applying a force to the lower sample fastening assembly 3, the upper horizontal moving assembly 2 is fixedly installed in the frame body 1, and the lower horizontal moving assembly 44 is installed in the frame body 1 through the up-down moving assembly 5.
The up-and-down moving assembly 5 comprises a moving base 51 and an up-and-down moving hydraulic cylinder 52, the lower horizontal moving assembly 44 is fixedly arranged on the moving base 51, the up-and-down moving hydraulic cylinder 5 is fixedly arranged in the frame 1, the moving base 51 is fixedly arranged at the movable end of the up-and-down moving hydraulic cylinder 52, and the moving base 51 is slidably arranged on the side wall of the frame 1. The movable base is designed into a hollow structure and is used for placing a lower fastening hydraulic cylinder arranged below the lower sliding plate, and the movable base simultaneously bears the load of 4 up-and-down movable hydraulic cylinders.
A sliding groove 53 is formed on the side wall of the frame 1 at a position corresponding to the side edge of the movable seat 51, and the side edge of the movable seat 51 is installed in the sliding groove 53.
The frame body 1 comprises a bearing upright post 11, an upper bearing beam 12 and a lower bearing beam 13, wherein the bearing upright post 11, the upper bearing beam 12 and the lower bearing beam 13 are fixedly connected into a cuboid frame; the up-and-down moving assembly 5 is fixedly arranged on the lower spandrel girder 13, and the horizontal moving assembly 4 is arranged on the bearing upright 11.
Here, the lower spandrel girder 13 is buried in the underground concrete by 4 anchor bolts 14.
It should be noted that, as shown in fig. 3, the system further includes a hydraulic station 6, a control center 7, and an electromagnetic control valve group 8, where an output end of the control center 7 is connected to the hydraulic station 6, and an output end of the hydraulic station 6 is connected to input ends of the upper fastening hydraulic cylinder 22, the lower fastening hydraulic cylinder 32, the horizontal hydraulic cylinder 42, and the up-down moving hydraulic cylinder 52; the electromagnetic control valve group 8 is arranged at the connection position of the control center 7 and the hydraulic station 6 and is used for controlling the opening and closing of each group of hydraulic cylinders.
The control center 7 comprises a control cabinet 71, a control pressure gauge 72, a control button 73 and a display 74, wherein the control pressure gauge 72, the control button 73 and the display 74 are all arranged on the control cabinet 71, the control pressure gauge 72 is internally provided with a hydraulic state for displaying each hydraulic cylinder, the control button 73 controls the size adjustment of the electromagnetic control valve group 8, and the display 74 is provided with a display control button 73 for adjusting the experimental condition, the experimental overall condition and the like.
During the test, remove the pedestal and reciprocate in the spout of 4 bearing stands, realize sample structure vertical stretching, go up sample fastening assembly and/or lower sample fastening assembly and drive by horizontal pneumatic cylinder and control the removal in the guide rail roof beam.
The upper sample fastening assembly and the lower sample fastening assembly are driven by respective horizontal hydraulic cylinders to move left and right in the guide rail beam under the action of the dislocation force in the horizontal direction applied to the upper sample fastening assembly and the lower sample fastening assembly, and at the moment, the movement directions of the upper sample fastening assembly and the lower sample fastening assembly are opposite; here, the upper sample fastening assembly can be kept still, and the lower sample fastening assembly is driven to move left and right in the guide rail beam by the horizontal hydraulic cylinder; the lower sample fastening assembly can be kept still, and the upper sample fastening assembly is driven to move left and right in the guide rail beam by the horizontal hydraulic cylinder.
As a preferred embodiment, as shown in fig. 4-6, the hot rolled H-section steel weldability test system further comprises a refrigerating device 9, wherein the refrigerating device 9 comprises a refrigerating box 91 and a cold air convection circulation system 92, an evaporator 921 is arranged on the cold air convection circulation system 92, and the evaporator 921 is arranged in the refrigerating box 91; the two sets of the refrigeration cases 91 are horizontally symmetrically disposed and have a first receiving space 102 formed therebetween for receiving the i-shaped steel member 100.
The refrigerating box body is arranged on the side face of the I-shaped steel component, under the condition that a large heat exchange area is reserved between the refrigerating box body and the I-shaped steel component, enough space is reserved for the design of the fixing and moving components of the hot rolled H-shaped steel on the upper portion and the lower portion of the I-shaped steel component, so that the welding test of the structural component is possible when an earthquake is simulated in a severe cold environment, the structural design of the refrigerating device on the I-shaped steel component is simple and reasonable, and the operability is strong.
The cold air convection circulation system 92 comprises an air inlet main pipe 922, air inlet branch pipes 923, an air outlet main pipe 924 and air outlet branch pipes 925, wherein a plurality of air inlet branch pipes 923 are uniformly distributed in the length direction of the air inlet main pipe 922, one end of each air inlet branch pipe 923 is communicated with the air inlet main pipe 922, and the other end of each air inlet branch pipe 923 is communicated with an evaporator 921 in the refrigeration box 91 through air inlets 911 uniformly distributed in the refrigeration box 91; a plurality of air outlet branch pipes 925 are uniformly distributed in the length direction of the air outlet main pipe 924, one end of each air outlet branch pipe 925 is communicated with the air outlet main pipe 924, and the other end of each air outlet branch pipe 925 is communicated with the evaporator 921 inside the refrigeration box 91 by uniformly distributing air outlets 912 of the refrigeration box 91.
Through the design of the arrangement structure of the air inlet main pipe, the air inlet branch pipes, the air outlet main pipe and the air outlet branch pipes outside the refrigeration box body, when cold air enters the evaporator through the air inlet branch pipes, the temperatures at different positions in the evaporator can be kept basically consistent, then under the action of the circulating fan, the temperatures when the air blows to the surface of the I-shaped steel component are basically the same, and the effect of simulating a severe cold environment is achieved.
The air inlet manifold 922 and the air outlet manifold 924 are vertically arranged at one side of the refrigeration box 91 away from the accommodating space 102; one end of each air inlet branch 923 is vertically arranged at two sides of the air inlet main 922 and horizontally extends to an air inlet 911 which is positioned on the refrigeration box 91 and is at the same height with each air inlet branch 923; one end of each of the air outlet branch pipes 925 is vertically arranged at two sides of the air outlet manifold 924, and horizontally extends to an air inlet 911 on the refrigeration box 91, which is at the same height as each of the air outlet branch pipes 925.
The air inlet main pipe and the air outlet main pipe are vertically arranged at one side of the refrigeration box body far away from the accommodating space, so that the distance from each branch pipe to the refrigeration box body is basically the same when the air inlet branch pipe and the air outlet branch pipe are designed, the heat exchange of the branch pipes in the air inlet and air outlet processes is effectively avoided, and the refrigeration effect is improved; and the air inlet main pipe and the air outlet main pipe are arranged on one side far away from the first accommodating space, so that more space can be moved for fixing and moving in the welding test of the I-shaped steel component, and the refrigerating device can be conveniently removed and added.
An air inlet 911 on the refrigeration box 91 is arranged at one side adjacent to the air inlet main 922, and an air outlet 912 on the refrigeration box 91 is arranged at the same side as the air outlet main 924.
A circulation fan 103 is disposed on the side of the refrigeration box 91 away from the accommodating space 102, and an air flow channel (not shown in the figure) for blowing cold air of the circulation fan 103 into the accommodating space is formed on the side wall of the refrigeration box 91 between the circulation fan 103 and the first accommodating space 102. Wind enters from two adjacent sides of the air inlet main pipe and exits from one side far away from the accommodating space, so that the evaporator has a large enough laying area in the refrigeration box body, and air brought to the evaporator from the circulating fan can have more opportunities of contacting with the evaporator, and the refrigeration effect is improved.
The refrigeration cassette 91 includes, in order from outside to inside, a metal outer shell layer 913, a heat-insulating layer 914, and a stainless steel sheet inner liner 915. Wherein, the metal shell layer 913 adopts a 1.2mm thick aluminum-zinc plated steel plate.
Two sets of refrigeration box 91 are in first accommodation space 102 one side butt joint lock sets up, forms the cuboid accommodation space that runs through from top to bottom, and two sets of refrigeration box is in accommodation space 102 one side is provided with the refrigeration box butt joint lock piece (not shown in the figure) of mutual butt joint lock.
Each group of refrigeration boxes 91 is configured with a lifting mobile trolley (not shown in the figure), and box hooks (not shown in the figure) are arranged on the refrigeration boxes, and the refrigeration boxes are lifted on the lifting mobile trolley through the box hooks.
As a preferred embodiment, the air inlet main pipe, the air inlet branch pipe, the air outlet main pipe and the air outlet branch pipe are all sleeved with heat insulation covers (not shown in the figure).
7-10, a flame combustion device 80 is further included, and comprises a cylindrical combustion box body formed by buckling two groups of semi-cylindrical combustion box bodies 81 and more than two burner assemblies 82 uniformly distributed on the outer circumferential side wall of the cylindrical combustion box body; a second accommodation space 83 for accommodating the i-shaped steel member is formed at the middle axis position of the cylindrical combustion box body.
The cylindrical combustion box formed by buckling the two groups of semi-cylindrical combustion box bodies is arranged on the side face of the I-shaped steel component, enough space is reserved for the design of the fixing and moving assembly of the hot-rolled H-shaped steel on the upper and lower parts of the I-shaped steel component under the condition that a large heat exchange area is reserved between the two groups of semi-cylindrical combustion box bodies and the I-shaped steel component, so that the welding test of the structural component in the fire disaster environment can be simulated during an earthquake, the position design of the structure of the flame combustion device on the I-shaped steel component is simple and reasonable, and the operability is strong.
The natural gas inlet 821 is connected with a natural gas supply assembly, the natural gas supply assembly comprises a natural gas storage tank 825 and a tangential natural gas burner 826, and the natural gas regulating valve 823 is arranged at the middle position of the tangential natural gas burner 826 and the natural gas storage tank 825; an air blower 827 is connected to the air inlet 822.
The semi-cylindrical combustion box 81 comprises a combustion box housing 811, a refractory insulating brick layer 812 and a refractory castable layer 813 from outside to inside in sequence, which are far from the side wall of the accommodating space, and the combustion box housing 811 is made of 5 mm stainless steel.
Here, a heat insulating blanket (not shown) is provided between the refractory brick layer 812 and the combustion box housing 811, and/or a heat insulating blanket is provided between the refractory brick layer 812 and the refractory castable layer 813.
As a preferred embodiment, as shown in fig. 11, the temperature control system 84 further includes a control center 7 and a platinum-rhodium thermocouple assembly 841, a platinum-rhodium thermocouple assembly 841 is disposed on a side of the semi-cylindrical combustion box 81 near the second accommodating space 83, an output end of the platinum-rhodium thermocouple assembly 841 is connected to an input end of the control center 7, and an input end of the control center 7 is connected to the natural gas regulating valve 823 and the air intake valve 824.
As a preferred embodiment, the fan assembly 85 further comprises a fan cover 851, a draught fan 852 and a chimney 853, wherein the fan cover 851 is disposed directly above the second accommodating space 83, and the draught fan 852 is disposed between the fan cover 851 and the chimney 853.
Two groups of semi-cylindrical combustion box 81 are in butt joint lock setting of second accommodation space 83 one side forms cuboid accommodation space that runs through from top to bottom, and two groups of semi-cylindrical combustion box 81 are in be provided with the combustion box butt joint lock piece 815 of mutual butt joint lock on the second accommodation space 83 one side.
Each group of semi-cylindrical combustion boxes 81 is provided with a second lifting mobile trolley 86, each semi-cylindrical combustion box 81 is provided with a second box lifting hook 814, and each semi-cylindrical combustion box is lifted on the second lifting mobile trolley 86 through the corresponding second box lifting hook 814.
As a preferred embodiment, in order to ensure the cooling after the combustion test, a cooling blower 87 is provided on the frame 1 for blowing air to cool the upper slide plate and the upper fastening hydraulic cylinder in the test system.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and various modifications and variations may be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The flame combustion device for the hot-rolled H-shaped steel welding property test is characterized by comprising a cylindrical combustion box body formed by buckling two groups of semi-cylindrical combustion box bodies and more than two burner assemblies uniformly distributed on the outer circumferential side wall of the cylindrical combustion box body; and an accommodating space for accommodating the I-shaped steel member is formed at the middle axis position of the cylindrical combustion box body.
2. The hot rolled H-section steel weldability test flame burner of claim 1, wherein the burner assembly comprises a natural gas inlet, an air inlet and a burner auto-igniter, the burner auto-igniter being disposed near the intersection of the natural gas inlet and the air inlet; the natural gas inlet is provided with a natural gas regulating valve, and the air inlet is provided with an air inlet valve; the natural gas inlet air inlet direction is parallel to the axis direction of the cylindrical combustion box body, and the air inlet direction is positioned on a tangent line of the position of the burner assembly on the side wall of the cylindrical combustion box body.
3. The flame combustion device for the hot rolled H-section steel weldability test according to claim 2, wherein the natural gas inlet is connected with a natural gas supply assembly, the natural gas supply assembly comprises a natural gas storage tank and a tangential natural gas burner, and the natural gas regulating valve is arranged at the middle position of the tangential natural gas burner and the natural gas storage tank; the air inlet is connected with a blower.
4. The flame combustion device for the hot rolled H-section steel weldability test according to claim 1, wherein the semi-cylindrical combustion box body comprises a combustion box shell, a refractory insulating brick layer and a refractory castable layer from outside to inside in sequence, and the combustion box shell is made of 5 mm stainless steel.
5. The flame combustion device for the hot rolled H-section steel weldability test according to claim 4, wherein a heat insulating blanket is arranged between the refractory insulating brick layer and the combustion box shell, and/or a heat insulating blanket is arranged between the refractory insulating brick layer and the refractory castable layer.
6. The flame combustion device for the hot rolled H-section steel welding property test according to claim 2, further comprising a temperature control system, wherein the temperature control system comprises a control center and a platinum-rhodium thermocouple temperature measuring assembly, the platinum-rhodium thermocouple temperature measuring assembly is arranged on one side of the semi-cylindrical combustion box body, which is close to the accommodating space, an output end of the platinum-rhodium thermocouple temperature measuring assembly is connected with an input end of the control center, and an input end of the control center is connected with the natural gas regulating valve and the air inlet valve.
7. The flame combustion device for hot rolled H-section steel weldability test of claim 1, further comprising an exhaust hood assembly, wherein the exhaust hood assembly comprises an exhaust hood, an induced draft fan and a chimney, the exhaust hood is arranged right above the accommodating space, and the induced draft fan is arranged between the exhaust hood and the chimney.
8. The flame combustion device for the hot rolled H-section steel welding property test according to claim 1, wherein two groups of semi-cylindrical combustion boxes are in butt joint and buckling arrangement on one side of the accommodating space to form a cuboid accommodating space penetrating up and down, and two groups of semi-cylindrical combustion boxes are provided with combustion box butt joint buckling pieces in butt joint and buckling mutually on one side of the accommodating space.
9. The flame combustion device for hot rolled H-section steel weldability test according to claim 1, wherein each group of semi-cylindrical combustion boxes is provided with a second hoisting travelling car, a second box lifting hook is arranged on the semi-cylindrical combustion box, and the semi-cylindrical combustion box is hoisted on the second hoisting travelling car through the second box lifting hook.
10. A hot rolled H-section steel weldability test system comprising a flame burner according to any one of claims 1-9.
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| CN202222250321.XU CN218896079U (en) | 2022-08-25 | 2022-08-25 | Flame combustion device and test system for hot-rolled H-shaped steel weldability test |
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| CN202222250321.XU CN218896079U (en) | 2022-08-25 | 2022-08-25 | Flame combustion device and test system for hot-rolled H-shaped steel weldability test |
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