Building steel structure fatigue resistance test equipment

Abstract

The invention relates to the technical field of building steel structure testing, in particular to building steel structure fatigue resistance testing equipment which further comprises an electric conveying frame, a supporting plate, an electric roller, a connecting plate, a driving assembly and a side edge pressure applying assembly, and the side edge pressure applying assembly is installed on a pressing block and used for conducting pressure applying testing on the side edge of a steel structure. The driving assembly is installed between the pressing block and the base. A steel structure is driven to move backwards to a testing position through forward rotation of an electric conveying frame and forward rotation of an electric roller, then a supporting plate drives the electric roller to swing downwards to be separated from the steel structure, the steel structure moves downwards to make contact with the top of a base to be stably placed, pressure is applied, and fatigue resistance testing is completed; and then the electric roller and the electric conveying roller are started to rotate reversely to move the tested steel structure forwards to complete unloading, so that loading and unloading of the steel structure can be completed through the electric roller and the electric conveying frame, manual operation is not needed, and the subsequent testing efficiency of the steel structure is improved.

Description

Technical Field

[0001] The invention relates to the technical field of building steel structure testing, and in particular to a building steel structure fatigue resistance testing device. Background Art

[0002] Steel structure is a structure made of steel materials and is one of the main types of building structures. During the production process of building steel structure, multiple processes are required, and fatigue resistance testing of steel structure is one of the processes. Fatigue resistance testing can help us understand whether the quality of the steel structure is qualified.

[0003] The Chinese patent with the announcement number CN215374474U discloses a fatigue resistance test device for steel structures for construction, which relates to the field of construction-related technologies. The present invention includes a transport mechanism, which includes two U-shaped plates, which are rotatably connected to a second screw rod, and a strip plate is arranged above the two U-shaped plates, and both ends of the strip plate are fixedly connected to a second connecting plate, and the outer side of the second connecting plate is slidably sleeved with a second sleeve, and the second sleeve is threadedly sleeved on the outer peripheral surface of the second screw rod. Although the above patent can perform fatigue resistance test on the steel structure, it is necessary to transport the steel structure to the strip plate, and then manually operate the transport mechanism to move the steel structure to complete loading and unloading. The whole operation increases the labor intensity of the operator, and the loading and unloading is slow, and additional operations are required to move the steel structure to the pallet and then start the hydraulic cylinder so that the detection plate presses the steel structure to complete the test, which affects the subsequent test efficiency of the steel structure.

[0004] The present invention aims to solve the problems existing in the above-mentioned patents. To this end, a fatigue resistance testing device for building steel structures is proposed, which can stably support the steel structure after loading and unloading, without the need for manual operation, thereby improving the efficiency of subsequent testing of the steel structure. Summary of the invention

[0005] In order to overcome the shortcomings of manually operating a conveying mechanism to move the steel structure to complete loading and unloading, the entire operation increases the labor intensity of the operator, the loading and unloading is slow, and during testing, since the conveying mechanism supports and places the steel structure, the conveying mechanism is easily damaged by the pressure applied, and the steel structure cannot be loaded and unloaded, which affects the subsequent testing efficiency of the steel structure. The present invention provides a fatigue resistance testing device for building steel structures that can load and unload steel structures without manual operation, thereby improving the subsequent testing efficiency of the steel structures.

[0006] The present invention is achieved through the following technical solutions:

[0007] A fatigue resistance testing device for building steel structures, comprising a base and a shell fixedly connected to the top of the base, a single-rod hydraulic cylinder fixedly connected to the inner side of the shell, a pressure block fixedly connected to the end of the telescopic rod of the single-rod hydraulic cylinder, an electric conveying frame, a support plate, an electric roller, a connecting plate, a driving assembly and a side pressure assembly, wherein the side pressure assembly is installed on the pressure block and is used to perform pressure testing on the side of the steel structure, wherein the driving assembly is installed between the pressure block and the base, four groups of support plates are rotatably connected on the base at even intervals, each group of support plates has two plates, and a connecting plate is rotatably connected between the upper parts of two support plates in each group, an electric roller is installed on the top of the support plate, and an electric conveying frame is installed on the base, wherein the electric conveying frame cooperates with the electric roller to drive the steel structure to move forward or backward for conveying, so as to complete the loading and unloading of the steel structure, and the driving assembly is used to drive the support plate to swing downward and retract to disengage from the steel structure, and due to the action of gravity, the steel structure moves downward and contacts with the base to generate friction for stable placement.

[0008] Further explanation, the driving assembly includes a contact rod fixedly connected to one of the support plates in each group, and guide grooves are symmetrically opened on both sides of the base. A movable plate is vertically slidably connected in the guide groove. A flat hole plate is fixedly connected to the movable plate, and the inner side of the flat hole plate is slidably connected to the contact rod to drive the contact rod to swing. A sleeve is fixedly connected to the top of the movable plate, and the sleeve slides through the top of the base. An n-type sliding rod is slidably connected between the inner sides of the left and right sleeves, and the n-type sliding rod is fixedly connected to the pressure block.

[0009] Further explanation, the side pressure assembly includes guide rods symmetrically fixed to both sides of the pressure block, a mounting plate is slidably mounted between the front and rear guide rods, side plates are vertically slidably connected to the mounting plates to apply pressure to both sides of the steel structure, connecting springs are symmetrically connected between the side plates and the mounting plates, a double-rod hydraulic cylinder is embedded and fixed to the top of the pressure block, and the end of the telescopic rod of the double-rod hydraulic cylinder is fixedly connected to the mounting plate.

[0010] As a further explanation, the side pressure assembly also includes balls rotatably connected to the bottom of the side plate at even intervals to reduce the friction between the side plate and the base.

[0011] Further explanation, the building steel structure fatigue resistance testing equipment also includes a positioning assembly, which includes a positioning plate symmetrically slidably connected to the top of the base to center the steel structure, a reciprocating screw symmetrically rotatably connected to the base, the reciprocating screw is threadedly connected to the positioning plate, a rotating shaft symmetrically rotatably connected to the top of the base, the rotating shaft and the reciprocating screw are transmitted through a synchronous belt assembly, and a rotating assembly is arranged between the rotating shaft and the pressure block to drive the rotating shaft to rotate.

[0012] To further illustrate, the rotating assembly includes a spur gear fixedly mounted on the rotating shaft, and a rack is symmetrically fixedly connected to the top of the pressing block, and the rack corresponds to the spur gear.

[0013] Further explanation, the building steel structure fatigue resistance test equipment also includes a collecting assembly, which includes an opening and closing plate symmetrically rotatably connected to the top of the base, a rotating rod connected to the middle of the base for transverse rotation, the rotating rod and the shaft of one of the support plates are driven by a synchronous belt assembly, a driving plate is fixedly mounted on the rotating rod, the top of the driving plate is in contact with the bottom of the opening and closing plate, and a collection frame is embedded on the rear side of the base below the opening and closing plate to collect debris generated during the test.

[0014] As a further explanation, the building steel structure fatigue resistance testing equipment also includes a rubber plate fixed to the inner side of the shell to buffer and position the steel structure.

[0015] The beneficial effects of the present invention are:

[0016] 1. Start the electric roller and the electric conveyor frame to rotate forward, and then make the steel structure contact with the electric conveyor frame. The electric conveyor frame rotates forward to drive the steel structure to move backward and contact with the electric roller. The electric roller rotates forward to drive the steel structure to move backward to the test position. Then the support plate drives the electric roller to swing downward and disengage from the steel structure. The steel structure moves downward and contacts with the top of the base for stable placement. Then the fatigue resistance test of the steel structure can be started. After the test is completed, start the electric roller and the electric conveyor roller in reverse to move the tested steel structure forward to complete the unloading. In this way, the loading and unloading of the steel structure can be completed by the electric roller and the electric conveyor frame without manual operation, thereby improving the efficiency of subsequent testing of the steel structure.

[0017] 2. Under the action of the side plates, whenever the steel structure needs to be tested for fatigue resistance from both sides, the side plates move back and forth to apply pressure on the left and right sides of the steel structure to complete the fatigue resistance test, which makes the fatigue resistance test of the steel structure more comprehensive.

[0018] 3. Under the action of the positioning plate, whenever the steel structure contacts the top of the base for placement, the positioning plate moves to center the steel structure. Subsequently, the steel structure after centering is pressurized to complete the fatigue resistance test, which can prevent the deviation of the steel structure position from affecting the pressure test of the side panel, thereby ensuring the precise placement of the steel structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the single-rod hydraulic cylinder and the pressing block of the present invention.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the sleeve, n-shaped sliding rod and movable plate of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the straight hole plate and the contact rod of the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the side pressure assembly of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the positioning component of the present invention.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the rack and spur gear of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the collecting component of the present invention.

[0027] Fig. 9 It is a schematic diagram of the three-dimensional structure of the rubber sheet of the present invention.

[0028] Among them: 1-base, 2-shell, 3-single-rod hydraulic cylinder, 4-pressure block, 5-electric conveyor frame, 6-support plate, 7-electric roller, 8-connecting plate, 9-sleeve, 91-n-type slide bar, 92-guide groove, 93-movable plate, 94-slotted hole plate, 95-contact rod, 10-guide rod, 101-mounting plate, 102-side plate, 103-connecting spring, 104-double-rod hydraulic cylinder, 105-ball, 11-positioning plate, 111-reciprocating screw, 112-rotating shaft, 113-rack, 114-spur gear, 12-opening and closing plate, 121-rotating rod, 122-driving plate, 123-collecting frame, 13-rubber plate. DETAILED DESCRIPTION

[0029] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0030] Example: A fatigue resistance test equipment for building steel structures, please refer to Figure 1-Figure 5As shown, it includes a base 1 and a shell 2 fixedly connected to the top of the base 1, a single-rod hydraulic cylinder 3 is fixedly connected to the middle of the top of the shell 2, a pressure block 4 is fixedly connected to the end of the telescopic rod of the single-rod hydraulic cylinder 3, and also includes an electric conveying frame 5, a support plate 6, an electric roller 7, a connecting plate 8, a driving component and a side pressure component. The side pressure component is installed on the pressure block 4. When the side pressure component is in operation, the side pressure component can realize a pressure test on the side of the steel structure. The driving component is installed between the pressure block 4 and the base 1. Four groups of support plates are evenly spaced and rotatably connected on the base 1. 6. The support plates 6 are tilted, and each group of support plates 6 has two plates. A connecting plate 8 is rotatably connected between the upper parts of the two support plates 6 in each group. An electric roller 7 is installed on the top of each support plate 6. An electric conveying frame 5 is installed in the middle of the front side of the base 1. The electric conveying frame 5 cooperates with the electric roller 7 to drive the steel structure to move forward or backward for conveying, so as to complete the loading and unloading of the steel structure, and the driving component is used to drive the support plate 6 to swing downward and retract to break contact with the steel structure. Due to the effect of gravity, the steel structure moves downward and contacts with the base 1 to generate friction for stable placement.

[0031] See also Figure 2-Figure 4 As shown, the driving assembly includes a sleeve 9, an n-shaped slide bar 91, a movable plate 93, a straight hole plate 94 and a contact rod 95. The contact rod 95 is fixedly connected to the side of the rearmost support plate 6 of each group away from the central axis of the base 1. Guide grooves 92 are symmetrically opened on the left and right sides of the base 1. The four guide grooves 92 are vertically slidably connected with movable plates 93. The sides of the movable plates 93 on the left and right sides that are close to each other are fixedly connected with straight hole plates 94. The inner side of the straight hole plate 94 is slidably connected to the contact rod 95. When the straight hole plate 94 moves up and down, the straight hole plate 94 can drive the contact rod 95 to swing up and down. The tops of the four movable plates 93 are fixedly connected with sleeves 9. The sleeve 9 slides through the top of the base 1. The n-shaped slide bar 91 is slidably connected between the inner sides of the left and right sleeves 9. The middle part of the n-shaped slide bar 91 is fixedly connected to the top of the pressure block 4.

[0032] See also Figure 5As shown, the side pressure assembly includes a guide rod 10, a mounting plate 101, a side plate 102, a connecting spring 103, a double-rod hydraulic cylinder 104 and a ball 105. The left and right sides of the pressure block 4 are symmetrically fixed with guide rods 10 front and back, and a mounting plate 101 is slidably mounted between the front and rear guide rods 10. The side plates 102 are vertically slidably penetrated on the mounting plates 101. When the side plates 102 move and contact the steel structure, the side plates 102 can apply pressure to both sides of the steel structure. Connecting springs 103 are symmetrically connected between the top of the side plates 102 and the inner side of the mounting plate 101 front and back. A double-rod hydraulic cylinder 104 is embedded and fixed in the middle of the top of the pressure block 4. The ends of the telescopic rods on the left and right sides of the double-rod hydraulic cylinder 104 are respectively fixedly connected to the middle parts of the left and right mounting plates 101, and the bottoms of the left and right side plates 102 are evenly spaced and rotatably connected with ball rollers 105. The ball rollers 105 can reduce the friction between the side plates 102 and the base 1.

[0033] First, start the electric conveyor frame 5 and the electric roller 7 to rotate forward, and then use the machine to move the steel structure from the front side to the electric conveyor frame 5. The electric conveyor frame 5 rotates forward to drive the steel structure to move backward. When the steel structure moves backward and contacts the electric roller 7, the electric roller 7 rotates forward to drive the steel structure to move backward for conveying and loading. When the steel structure moves backward to a suitable position, close the electric conveyor frame 5 and the electric roller 7, and then start the single-rod hydraulic cylinder 3. The telescopic rod of the single-rod hydraulic cylinder 3 extends to drive the pressure block 4 to move downward. The downward movement of the pressure block 4 drives the n-type slide bar 91 to move downward. The n-type slide bar 91 moves downward to stop limiting the sleeve 9. Due to the effect of gravity, the sleeve 9 moves downward to drive the movable plate 93 to move downward, and the movable plate 93 drives the slotted hole plate 94 to move downward. The straight hole plate 94 moves downward, driving the contact rod 95 to swing downward, and the contact rod 95 drives the support plate 6 on the rear side of each group to swing downward, and the support plate 6 on the rear side of each group drives the support plate 6 on the front side of each group to swing downward through the connecting plate 8, and the support plate 6 swings downward to drive the electric roller 7 to swing downward and break contact with the steel structure, and the electric roller 7 swings downward to first drive the steel structure to move backward and contact with the rear side of the shell 2 to be limited, and then the electric roller 7 continues to swing downward and break contact with the steel structure. Due to the effect of gravity, the steel structure moves downward and contacts with the base 1 to generate friction, so that the steel structure is firmly placed on the base 1, and when the movable plate 93 moves downward to the maximum stroke, the movable plate 93 stops moving downward, and the movable plate 93 stops the sleeve 9 from moving downward, and the n-type slide bar 9 1 continues to move downward and slides in the sleeve 9. At the same time, the pressing block 4 also drives the mounting plate 101 to move downward through the guide rod 10. The mounting plate 101 drives the side plate 102 to move downward through the connecting spring 103. The side plate 102 moves downward and drives the ball 105 to move downward. When the ball 105 moves downward and contacts the base 1, the side plate 102 stops moving downward. Then the mounting plate 101 continues to move downward to compress the connecting spring 103, and the pressing block 4 continues to move downward to contact the steel structure. The pressing block 4 applies pressure to the steel structure from top to bottom, and the single-rod hydraulic cylinder 3 is started to drive the pressing block 4 to move upward and break away from the steel structure. Then, the pressing block 4 moves downward to apply pressure to the steel structure. This is repeated, so that the pressing block 4 can continuously move up and down to apply pressure to the steel structure. The fatigue resistance test is completed by pressing. When the fatigue resistance test from top to bottom is completed, the single-rod hydraulic cylinder 3 is started to drive the pressing block 4 to move upward and reset. The pressing block 4 is out of contact with the steel structure. The pressing block 4 drives the mounting plate 101 to move upward through the guide rod 10. The mounting plate 101 first resets the connecting spring 103, and then the mounting plate 101 drives the side plate 102 to move upward and reset through the connecting spring 103. The side plate 102 is out of contact with the base 1. At the same time, the pressing block 4 drives the n-type slide bar 91 to move upward. When the n-type slide bar 91 moves upward and contacts with the top of the sleeve 9, the n-type slide bar 91 drives the sleeve 9 to move upward. The sleeve 9 drives the movable plate 93 to move upward and reset. The movable plate 93 drives the support plate 6 to swing upward and reset through the slotted hole plate 94 and the contact rod 95.The support plate 6 drives the steel structure to move upward through the electric roller 7 to break away from the contact with the base 1. When the steel structure moves upward and resets, the single-rod hydraulic cylinder 3 is closed, and the electric roller 7 and the electric conveyor frame 5 are started to reverse. The electric roller 7 reverses and first drives the steel structure to move forward to the electric conveyor frame 5 to complete the unloading. The electric conveyor frame 5 reverses and then drives the steel structure to move forward to the front side. The operator can pick up the tested steel structure for inspection, and understand whether the quality is qualified by checking the test results of the steel structure. Then, the electric roller 7 and the electric conveyor frame 5 are started to rotate forward, and the fatigue resistance test of the next steel structure can be continued according to the above operations. When it is necessary to apply pressure to both sides of the steel structure to complete the fatigue resistance test, whenever the side plate 102 moves downward and contacts the base 1, and the pressure block 4 contacts the top of the steel structure, the single-rod hydraulic cylinder 3 is closed and the pressure block 4 stops moving. At this time, the double-rod hydraulic cylinder 104 is started, and the telescopic rod of the double-rod hydraulic cylinder 104 is shortened to drive the left and right mounting plates 101 to move towards each other, and the mounting plates 101 drive the left and right side plates 102 to move towards each other, and the ball bearings 105 guide the side plates 102, thereby reducing the friction between the side plates 102 and the base 1, so that the side plates 102 move more smoothly. When the left and right side plates 102 move and contact the steel structure, the left and right side plates 102 applies pressure to the steel structure from the left and right sides to further complete the fatigue resistance test, and then the double-rod hydraulic cylinder 104 is started to drive the left and right mounting plates 101 to move and reset in the direction away from each other, and the mounting plate 101 drives the side plate 102 to move and reset and disengage from the steel structure. In this way, the side plate 102 can continuously move back and forth to apply pressure to the steel structure to complete the fatigue resistance test, which also makes the fatigue resistance test of the steel structure more comprehensive. After the fatigue resistance test on both sides of the steel structure is completed, the double-rod hydraulic cylinder 104 is closed, and the side plate 102 is in place. In this way, the loading and unloading of the steel structure can be completed through the electric roller 7 and the electric conveyor frame 5 without manual operation, thereby improving the efficiency of subsequent testing of the steel structure.

[0034] See also Figure 6 and Figure 7As shown, the building steel structure fatigue resistance testing equipment also includes a positioning assembly installed between the pressing block 4 and the base 1, the positioning assembly includes a positioning plate 11, a reciprocating screw rod 111, a rotating shaft 112 and a rotating assembly, the top of the base 1 is symmetrically slidably connected with the positioning plate 11, when the positioning plate 11 moves and contacts with the steel structure, the positioning plate 11 can realize the center positioning of the steel structure, the lower part of the base 1 is symmetrically rotated and connected with the reciprocating screw rod 111, the reciprocating screw rods 111 on the left and right sides are respectively threadedly connected to the lower part of the positioning plates 11 on the left and right sides, and the top of the base 1 The left and right parts are symmetrically connected with a rotating shaft 112, and the left and right rotating shafts 112 are respectively transmitted to the left and right reciprocating screw rods 111 through a synchronous belt assembly. A rotating assembly is arranged between the rotating shaft 112 and the pressure block 4. When the rotating assembly is in operation, the rotating assembly can drive the rotating shaft 112 to rotate; the rotating assembly includes a rack 113 and a spur gear 114, and the left and right rotating shafts 112 are fixedly mounted with spur gears 114. The top of the pressure block 4 is symmetrically fixed with racks 113, and the left and right racks 113 correspond to the left and right spur gears 114 respectively.

[0035] See also Figure 8 As shown, the building steel structure fatigue resistance testing equipment also includes a collecting component installed on the base 1, the collecting component includes an opening and closing plate 12, a rotating rod 121, a driving plate 122 and a collecting frame 123, the opening and closing plate 12 is symmetrically rotated in the middle of the top of the base 1, the middle part of the base 1 is laterally rotated and connected to the rotating rod 121, the left side of the rotating rod 121 and the shaft of the support plate 6 on the left rear front side are driven by a synchronous belt assembly, the middle part of the rotating rod 121 is fixedly sleeved with a driving plate 122, the top of the driving plate 122 contacts the bottom of the opening and closing plates 12 on the left and right sides, and a collecting frame 123 is embedded in the lower rear part of the base 1, and the collecting frame 123 is located below the opening and closing plate 12, and the collecting resistance can collect the debris generated during the test.

[0036] When the pressing block 4 moves downward, the pressing block 4 drives the rack 113 to move downward, and the rack 113 moves downward to mesh with the spur gear 114, and the rack 113 drives the spur gear 114 to rotate forward, and the forward rotation of the spur gear 114 drives the rotating shaft 112 to rotate forward, and the forward rotation of the rotating shaft 112 drives the reciprocating screw rod 111 to rotate through the synchronous belt assembly. The meshing of the rack 113 and the spur gear 114 can make the reciprocating screw rod 111 rotate and drive the positioning plate 11 to move back and forth once, so that the rotation of the reciprocating screw rod 111 first drives the positioning plates 11 on the left and right sides to move closer to each other. The left and right positioning plates 11 contact the steel structure, and the left and right positioning plates 11 center the steel structure. Then the reciprocating screw 111 continues to rotate to drive the left and right positioning plates 11 to move away from each other and reset. At this time, the rack 113 is disengaged from the spur gear 114, and the spur gear 114 stops rotating forward. The positioning plate 11 also stops moving. The pressure block 4 and the side plate 102 perform fatigue resistance test on the steel structure after centering. When the pressure block 4 moves upward to reset, the pressure block 4 drives the rack 113 to move upward to reset. In this way, the deviation of the steel structure position can be prevented from affecting the pressure test of the side plate 102, thereby ensuring the accurate placement of the steel structure.

[0037] When the left rear support plate 6 swings downward, the left rear support plate 6 drives the rotating rod 121 to rotate forward through the synchronous belt assembly, and the rotating rod 121 rotates forward to drive the driving plate 122 to swing downward, and the driving plate 122 swings downward and breaks away from the opening and closing plate 12. Due to the effect of gravity, the opening and closing plates 12 on the left and right sides swing downward in an inclined state, and then when the steel structure is subjected to pressure testing, as the steel structure is continuously subjected to pressure, the steel structure will crack, and the cracks will produce debris, which will fall onto the opening and closing plate 12. Since the opening and closing plate 12 is set at an angle, the debris will fall from the opening and closing plate 12. The debris is collected in the collection frame 123. After the fatigue resistance test of the steel structure is completed, the support plate 6 swings upward to drive the steel structure to swing upward and reset, and the left rear support plate 6 drives the rotating rod 121 to rotate forward through the synchronous belt assembly, and the rotating rod 121 drives the driving plate 122 to swing upward and reset. The driving plate 122 resets and drives the opening and closing plates 12 on both sides to swing upward and reset. The opening and closing plates 12 reset and reset the collection frame 123, and then pull the collection frame 123 backward to break contact with the base 1, pour out all the debris in the collection frame 123, and then put the collection frame 123 back to the inside of the base 1. In this way, the debris can be prevented from falling onto the base 1 and affecting the subsequent placement of the steel structure, thereby ensuring the stability of the steel structure placement.

[0038] See also Fig. 9 As shown, the building steel structure fatigue resistance testing equipment also includes a rubber plate 13. The rubber plate 13 is fixedly connected to the lower part of the rear side surface of the shell 2. The rubber plate 13 can achieve buffering and positioning of the steel structure.

[0039] When the electric roller 7 rotates forward and drives the steel structure to move backward, the steel structure moves backward and contacts the rubber plate 13 to stop moving. The rubber plate 13 positions the steel structure so that the steel structure is in a precise test position. The rubber material of the rubber plate 13 can provide buffer protection for the steel structure. In this way, the steel structure can be prevented from violently contacting the housing 2 and causing damage to the housing 2, thereby ensuring the safety of the housing 2.

[0040] Finally, it is necessary to point out that the above content is only used to help understand the technical solution of the present invention and cannot be understood as limiting the scope of protection of the present invention; non-essential improvements and adjustments made by technical personnel in the field of technology based on the above content of the present invention are all within the scope of protection required by the present invention.

Claims

1. A fatigue resistance testing device for building steel structures, comprising a base (1) and a shell (2) fixed to the top of the base (1), a single-rod hydraulic cylinder (3) fixed to the inner side of the shell (2), a pressing block (4) fixed to the end of the telescopic rod of the single-rod hydraulic cylinder (3), characterized in that: The structure also comprises an electric conveying frame (5), a support plate (6), an electric roller (7), a connecting plate (8), a driving assembly and a side pressure assembly. The side pressure assembly is mounted on the pressing block (4) and is used to perform a pressure test on the side of the steel structure. The driving assembly is mounted between the pressing block (4) and the base (1). Four groups of support plates (6) are evenly spaced and rotatably connected on the base (1). Each group of support plates (6) has two support plates. A connecting plate (8) is rotatably connected between the upper parts of the two support plates (6) in each group. An electric roller (7) is mounted on the top of the support plate (6). The base (1) is mounted with an electric conveying frame (5). The electric conveying frame (5) cooperates with the electric roller (7) to drive the steel structure to move forward or backward for conveying, so as to complete the loading and unloading of the steel structure. The driving assembly is used to drive the support plate (6) to swing downward and retract to break away from the contact with the steel structure. Due to the effect of gravity, the steel structure moves downward and contacts with the base (1) to generate friction for stable placement.

2. A building steel structure fatigue resistance testing equipment according to claim 1, characterized in that: The driving assembly comprises a contact rod (95) fixedly connected to one of the support plates (6) of each group, guide grooves (92) are symmetrically opened on both sides of the base (1), a movable plate (93) is vertically slidably connected in the guide groove (92), a straight hole plate (94) is fixedly connected to the movable plate (93), the inner side of the straight hole plate (94) is slidably connected to the contact rod (95) to drive the contact rod (95) to swing, a sleeve (9) is fixedly connected to the top of the movable plate (93), the sleeve (9) slidably penetrates the top of the base (1), an n-shaped slide bar (91) is slidably connected between the inner sides of the sleeves (9) on the left and right sides, and the n-shaped slide bar (91) is fixedly connected to the pressing block (4).

3. The building steel structure fatigue resistance testing equipment according to claim 2, characterized in that: The side pressure component comprises guide rods (10) symmetrically fixed to both sides of the pressure block (4); a mounting plate (101) is slidably mounted between the front and rear guide rods (10); a side plate (102) is vertically slidably penetrated on the mounting plate (101) to apply pressure to both sides of the steel structure; a connecting spring (103) is symmetrically connected between the side plate (102) and the mounting plate (101); a double-rod hydraulic cylinder (104) is embedded and fixedly mounted on the top of the pressure block (4); and the end of the telescopic rod of the double-rod hydraulic cylinder (104) is fixedly connected to the mounting plate (101).

4. The building steel structure fatigue resistance testing equipment according to claim 3, characterized in that: The side pressure assembly also includes balls (105) rotatably connected to the bottom of the side plate (102) at even intervals to reduce the friction between the side plate (102) and the base (1).

5. The building steel structure fatigue resistance testing equipment according to claim 4, characterized in that: The building steel structure fatigue resistance testing equipment also includes a positioning assembly, which includes a positioning plate (11) symmetrically slidably connected to the top of the base (1) to center the steel structure, a reciprocating screw (111) symmetrically rotatably connected to the base (1), the reciprocating screw (111) and the positioning plate (11) are threadedly connected, a rotating shaft (112) is symmetrically rotatably connected to the top of the base (1), the rotating shaft (112) and the reciprocating screw (111) are driven by a synchronous belt assembly, and a rotating assembly is provided between the rotating shaft (112) and the pressing block (4) to drive the rotating shaft (112) to rotate.

6. The building steel structure fatigue resistance testing equipment according to claim 5, characterized in that: The rotating assembly comprises a spur gear (114) fixedly sleeved on the rotating shaft (112); a rack (113) is symmetrically fixedly connected to the top of the pressing block (4); the rack (113) corresponds to the spur gear (114).

7. The building steel structure fatigue resistance testing equipment according to claim 6, characterized in that: The building steel structure fatigue resistance testing equipment also includes a collecting assembly, which includes an opening and closing plate (12) symmetrically rotatably connected to the top of a base (1), a rotating rod (121) is lateraly rotatably connected to the middle of the base (1), the rotating rod (121) and the shaft of one of the support plates (6) are driven by a synchronous belt assembly, a driving plate (122) is fixedly mounted on the rotating rod (121), the top of the driving plate (122 is in contact with the bottom of the opening and closing plate (12), and a collecting frame (123) is embedded in the rear side of the base (1) and is located below the opening and closing plate (12) to collect debris generated during the test.

8. The building steel structure fatigue resistance testing equipment according to claim 7, characterized in that: establish The steel structure fatigue resistance testing device also includes a rubber plate (13) fixed to the inner side of the housing (2). To buffer and position the steel structure.

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