CN117589608A - Anchor bolt tension fatigue testing machine - Google Patents
Anchor bolt tension fatigue testing machine Download PDFInfo
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- CN117589608A CN117589608A CN202410063794.XA CN202410063794A CN117589608A CN 117589608 A CN117589608 A CN 117589608A CN 202410063794 A CN202410063794 A CN 202410063794A CN 117589608 A CN117589608 A CN 117589608A
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 27
- 238000003825 pressing Methods 0.000 claims description 48
- 230000007246 mechanism Effects 0.000 claims description 38
- 238000009434 installation Methods 0.000 claims description 18
- 230000001360 synchronised effect Effects 0.000 claims description 15
- 230000008859 change Effects 0.000 claims description 5
- 230000010349 pulsation Effects 0.000 claims description 3
- 240000005002 Erythronium dens canis Species 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000001788 irregular Effects 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 230000001066 destructive effect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the field of anchor bolt life test equipment, in particular to an anchor bolt tensile fatigue testing machine, which comprises a bottom fixing plate, wherein a concrete fixing plate is fixed at the upper end of the bottom fixing plate, a vibration generating device is fixedly arranged at the lower end of the concrete fixing plate, the lower end of the vibration generating device is fixedly arranged on the bottom fixing plate, positioning sliding grooves are symmetrically arranged on the bottom fixing plate, a hanging plate is fixedly arranged at the upper end of the concrete fixing plate, front and rear sliding rods are fixedly arranged at the lower ends of the left side and the right side of the hanging plate, the front and rear sliding rods are in sliding connection with the positioning sliding grooves, a lifting device is fixedly arranged at the lower end of the hanging plate, and a concrete fixing device is further arranged on the concrete fixing plate, so that the invention can apply vibration load to concrete blocks in the vertical direction and fix cylindrical concrete blocks.
Description
Technical Field
The invention relates to the field of anchor bolt life test equipment, in particular to an anchor bolt tensile fatigue testing machine.
Background
The fatigue testing machine for the anchor bolts is equipment for testing and evaluating the durability of the materials and the structures of the anchor bolts, and is used for carrying out fatigue tests on the anchor bolts by simulating stress loading and repeated cyclic loading under real working conditions, so as to simulate the stress change condition of the anchor bolts in actual use and working to verify the durability and the service life of the anchor bolts, and can provide scientific basis and guidance to ensure the reliability and the safety of the anchor bolts in complex engineering environments by carrying out the fatigue tests on the anchor bolts.
The existing anchor bolt tension fatigue testing machine often adopts a platform to place concrete blocks, two metal plates are arranged at the left end and the right end of the concrete blocks, one metal plate is a fixed plate, one metal plate is connected with a device for applying load, the upper part is provided with a device for lifting the anchor bolts, the mode can only apply vibration load to the concrete blocks along the horizontal direction, the load born by a concrete building is in the horizontal direction and in the vertical direction, and meanwhile, the existing anchor bolt fatigue testing machine can only fix square concrete blocks, but in reality, the concrete shape of the concrete blocks also can influence the fixing strength of the anchor bolts.
Disclosure of Invention
The invention provides an anchor bolt tension fatigue testing machine which can apply vibration load to a concrete block along the vertical direction and fix a cylindrical concrete block.
The invention provides an anchor bolt tension fatigue testing machine, which comprises a bottom fixing plate, wherein a concrete fixing plate is fixed at the upper end of the bottom fixing plate;
the vibration generating device is arranged at the lower end of the concrete fixing plate, and the lower end of the vibration generating device is fixedly arranged on the concrete fixing plate;
the bottom fixing plate is symmetrically provided with positioning sliding grooves;
the hoisting plate is arranged at the upper end of the concrete fixing plate;
the front and rear sliding rods are fixedly arranged at the lower ends of the left side and the right side of the hanging plate, and are in sliding connection with the positioning sliding grooves;
the vertical center line of the lifting device and the vertical center line of the vibration generating device are on the same straight line;
the concrete fixing device is arranged on the concrete fixing plate.
In particular, concrete fixing device includes the centre gripping installation piece, set up the fixed sliding tray that circumference distributes on the concrete fixed plate, the reverse extension line of fixed sliding tray gathers to a bit, and the contained angle between the adjacent fixed sliding tray is the same, sliding connection has the centre gripping installation piece in the fixed sliding tray, the upper end of centre gripping installation piece is provided with the grip block, the lower extreme rotation of concrete fixed plate is connected with synchronous slide dish, set up the spout that deflects into spiral form on the synchronous slide dish, the spout circumference that deflects distributes has a plurality ofly, and deflect the spout with the corresponding setting of centre gripping installation piece, deflect the spout with centre gripping installation piece sliding connection, synchronous slide dish's outside cover is equipped with driven gear, driven gear's outside meshing has the driving gear.
Specifically, the clamping plate is fixedly provided with a jacking device, the jacking device comprises a pre-jacking block, the pre-jacking block is arranged at one end of the clamping plate facing the central shaft of the concrete fixing plate, one end of the pre-jacking block facing the clamping plate is fixedly provided with a lateral rod, the lateral rod is in sliding connection with the clamping plate, the middle position of the clamping plate is provided with a through groove, the clamping plate is rotationally connected with a jacking gear at the position corresponding to the through groove, the lower end of the lateral rod is fixedly provided with a conducting rack, the conducting rack is meshed with the jacking gear, the conducting rack is further in sliding connection with the clamping plate, the clamping plate is further in sliding connection with a jacking rack along the vertical direction, the jacking racks are respectively arranged at two sides of the conducting rack, the jacking rack is meshed with the jacking gear, the upper ends of the jacking racks penetrate through the upper ends of the clamping plate, the upper ends of the two jacking racks are fixedly connected with a top plate together, and the upper ends of the two jacking racks are fixedly connected with a top plate, and the upper plate is fixedly connected with a reset spring rod between the upper end of the jacking plate and the upper plate.
Particularly, the upper surface of centre gripping installation piece has seted up and has been changed the position groove, change the upper end in position groove with grip block sliding connection, change the both sides wall in position groove evenly seted up, two opposite sides form the inclined plane form, be provided with on the grip block with change the automatic positioning mechanism of side looks interlock in position groove.
Particularly, the automatic positioning mechanism comprises a biting mechanism and a jacking mechanism, the biting mechanism comprises a biting plate, a pressing-in spring and a jacking connecting rod, a notch is formed in the lower end of the clamping plate, the biting plate is arranged in the notch, the biting plate faces the left side wall and the right side wall of the repositioning groove, convex teeth which are matched with the repositioning groove are machined on the biting plate, the biting plate is in sliding connection with the clamping plate, the pressing-in spring is fixedly installed between the biting plate and the bottom surface of the notch in the lower end of the clamping plate, the jacking connecting rod is fixedly installed in the middle of the biting plate, the jacking connecting rod is slidably inserted into the clamping plate, and the jacking mechanism for pressing the jacking connecting rod is arranged in the clamping plate.
Particularly, the jacking mechanism comprises a jacking rod and a vertical moving plate, wherein a vertical sliding groove is formed in the clamping plate along the vertical direction, the jacking rod is connected in the vertical sliding groove in a sliding manner, the upper end of the jacking rod extends into the through groove, the two side ends of the lower end of the jacking rod, which face the biting plate, are in an inclined plane shape, the lower end of the jacking rod is in inclined plane shape and is in sliding contact with the jacking rod, the upper end of the jacking rod is fixedly connected with the vertical moving plate, and a pressing mechanism for applying pressure to the vertical moving plate is arranged in the through groove.
Specifically, the pressing mechanism comprises a vertical guide rod and a vertical moving screw rod, wherein the vertical guide rod is fixedly arranged on the lower bottom surface of the through groove, the vertical moving plate is in sliding connection with the vertical guide rod along the vertical direction, the vertical moving screw rod is in rotary connection with the upper end of the through groove, and the vertical moving screw rod is in threaded connection with the vertical guide rod.
In particular, the vibration generating device consists of a pulsating hydraulic source, a digital control system and a computer data acquisition system.
The beneficial effects of the invention are as follows:
(1) According to the invention, concrete is fixedly arranged on a concrete fixing plate through a concrete fixing device, a pulling force is applied to an anchor bolt through a lifting device, pulse shock waves are sent to the concrete fixing plate through a vibration generating device, the vibration generating device is connected with an external computer control system, the situation that the anchor bolt is broken with a concrete block in a destructive manner under the condition of being subjected to multiple times of shock is calculated, and the pulling force sensor in the lifting device is combined to obtain pulling force fatigue experimental data of the anchor bolt, so that a pulling force fatigue experiment can be carried out on the anchor bolt and the fixing position of the anchor bolt and the concrete along the vertical direction through the device.
(2) According to the invention, the synchronous sliding disc and the clamping installation block mutually slide, the clamping installation block drives the clamping plate to clamp the concrete block, so that the cylindrical concrete block can be fixed under the condition of meeting the requirement of carrying out a tension fatigue experiment on an anchor bolt along the vertical direction, and meanwhile, the downward pressure is applied to the concrete block through the pressing plate in the pressing device, and the concrete block is placed to generate displacement along the vertical direction.
(3) In the process of fixing the concrete blocks, in order to fix the concrete blocks with irregular sections, when the pressing plate is pressed against the upper ends of the concrete blocks, the pre-pressing block drives the clamping plates to slide along the fixed sliding grooves, and when all the pressing plates press the upper end surfaces of the concrete, the clamping plates are clamped in the repositioning grooves through the automatic positioning mechanism, so that the concrete blocks are completely fixed, and even if the shapes of the concrete blocks are irregular, the concrete blocks can be fixed.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic bottom view of a concrete retainer plate according to the present invention;
FIG. 3 is a schematic view of a concrete fixing device according to the present invention;
FIG. 4 is an enlarged schematic view of the structure A in FIG. 3 according to the present invention;
FIG. 5 is an enlarged schematic view of the structure of FIG. 3B according to the present invention;
fig. 6 is a schematic view showing a cut-away structure of a clamping plate according to the present invention.
In the figure: 1. a bottom fixing plate; 11. a positioning sliding groove; 2. a concrete fixing plate; 21. a fixed sliding groove; 22. a synchronous sliding disc; 221. deflecting the chute; 222. a driven gear; 223. a drive gear; 3. a vibration generating device; 4. a hanging plate; 5. a front-rear slide bar; 6. a lifting device; 7. a concrete fixing device; 71. clamping the mounting block; 711. a repositioning groove; 712. tooth slots; 72. a clamping plate; 721. a through groove; 722. a vertical sliding groove; 8. a capping device; 81. pre-jacking blocks; 811. a lateral rod; 82. pressing a top gear; 83. a conductive rack; 84. pressing a rack; 85. a pressing plate; 86. a reset spring lever; 9. an automatic positioning mechanism; 91. a snapping mechanism; 911. a bite plate; 912. pressing in a spring; 913. a connecting rod is propped against; 92. a pushing and closing mechanism; 921. a pushing rod; 922. a vertical moving plate; 93. a pressing mechanism; 931. a vertical guide bar; 932. the screw is moved vertically.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
Embodiment one:
as shown in fig. 1, the invention provides an anchor bolt tension fatigue testing machine, which comprises a bottom fixing plate 1, wherein a concrete fixing plate 2 is fixed at the upper end of the bottom fixing plate 1, a vibration generating device 3 is arranged at the lower end of the concrete fixing plate 2, the lower end of the vibration generating device 3 is fixedly arranged on the bottom fixing plate 1, positioning sliding grooves 11 are symmetrically arranged on the bottom fixing plate 1, a lifting plate 4 is arranged at the upper end of the concrete fixing plate 2, front and rear sliding rods 5 are fixedly arranged at the lower ends of the left and right sides of the lifting plate 4, the front and rear sliding rods 5 are in sliding connection with the positioning sliding grooves 11, the vertical center line of the lifting device 6 and the vertical center line of the vibration generating device 3 are in the same straight line, and the concrete fixing device 7 is arranged on the concrete fixing plate 2.
In the concrete working process, a concrete block with an anchor bolt fixedly arranged at the upper end is placed at the position of the middle upper end of a concrete fixing plate 2, then the concrete is fixedly arranged on the concrete fixing plate 2 through a concrete fixing device 7, then a front-back sliding rod 5 can be controlled to move along the front-back direction through a hydraulic cylinder and other devices, a lifting device 6 on a lifting plate 4 is aligned with the anchor bolt on the concrete block, the anchor bolt is fixed on the lifting device 6, the lifting device 6 can be composed of a hydraulic telescopic cylinder and a tension sensor, pulse oscillation waves are sent to the concrete fixing plate through a vibration generating device 3, the vibration generating device 3 is connected with an external computer control system, the anchor bolt is subjected to destructive disconnection with the concrete block under the condition of being subjected to a plurality of times of oscillations, and then the tension sensor in the lifting device 6 is combined to obtain tension fatigue test data of the anchor bolt, the anchor bolt and the fixing position of the anchor bolt and the concrete can be subjected to tension fatigue test along the vertical direction through the devices,
the vibration generating device 3 consists of a pulsation hydraulic source, a digital control system and a computer data acquisition system.
In the fatigue test process of the anchor bolt, the digital control system is used for controlling the waveform and the frequency sent by the pulsation hydraulic source, the computer data acquisition system is used for collecting the frequency, the amplitude and the frequency of vibration, and meanwhile, the data collection is carried out on the tensile force generated by the pulling device 6, so that experimental data are finally obtained.
Embodiment two:
as shown in fig. 2 and fig. 3, the concrete fixing device 7 includes a clamping mounting block 71, circumferentially distributed fixed sliding grooves 21 are formed in the concrete fixing plate 2, opposite extension lines of the fixed sliding grooves 21 converge to a point, and angles between adjacent fixed sliding grooves 21 are the same, the clamping mounting block 71 is slidably connected in the fixed sliding grooves 21, a clamping plate 72 is disposed at an upper end of the clamping mounting block 71, a synchronous sliding disc 22 is rotatably connected at a lower end of the concrete fixing plate 2, spiral deflection sliding grooves 221 are formed in the synchronous sliding disc 22, a plurality of deflection sliding grooves 221 are circumferentially distributed and are correspondingly arranged with the clamping mounting block 71, the deflection sliding grooves 221 are slidably connected with the clamping mounting block 71, a driven gear 222 is sleeved on an outer side of the synchronous sliding disc 22, and a driving gear 223 is meshed with an outer side of the driven gear 222.
In the process of fixing concrete through the concrete fixing device 7, an external driving device, such as a motor, drives the driving gear 223 to rotate, the driving gear 223 drives the driven gear 222 to rotate, the driven gear 222 drives the synchronous sliding disc 22 to rotate, the synchronous sliding disc 22 and the clamping installation block 71 slide mutually, and the clamping installation block 71 drives the clamping plate 72 to clamp the concrete block, so that the cylindrical concrete block can be fixed under the condition of satisfying the tensile fatigue test on the anchor bolt along the vertical direction.
Embodiment III:
as shown in fig. 3, fig. 4, fig. 5 and fig. 6, the pressing device 8 is fixedly mounted on the clamping plate 72, the pressing device 8 comprises a pre-pressing block 81, the pre-pressing block 81 is arranged at one end of the clamping plate 72 facing the central shaft of the concrete fixing plate 2, a lateral rod 811 is fixedly mounted at one end of the pre-pressing block 81 facing the clamping plate 72, the lateral rod 811 is slidably connected with the clamping plate 72, a through groove 721 is formed in the middle position of the clamping plate 72, the clamping plate 72 is rotatably connected with a pressing gear 82 at a position corresponding to the through groove 721, a conducting rack 83 is fixedly mounted at the lower end of the lateral rod 811 of the pre-pressing block 81, the conducting rack 83 is meshed with the pressing gear 82, the conducting rack 83 is slidably connected with the clamping plate 72, pressing racks 84 are slidably connected with each other in the vertical direction, one side of the conducting racks 84 is slidably connected with the two sides of the conducting rack 83, the pressing rack 84 is meshed with the pressing gear 82, the pressing rack 84 is fixedly connected with the pressing plate 84, and the pressing plate 85 is fixedly connected with the pressing plate 72.
In order to restrain the concrete block from moving in the vertical direction when the clamping plate 72 is close to the concrete block, the pre-jacking block 81 is firstly contacted with the concrete block, at this time, the pre-jacking block 81 and the conducting rack 83 can slide relatively to the clamping plate 72, the conducting rack 83 can be meshed with the jacking gear 82 relatively to enable the jacking gear 82 to rotate, the jacking gear 82 can be meshed with the jacking rack 84, so that the jacking rack 84 drives the jacking plate 85 to move downwards, all the jacking plates 85 synchronously move downwards to press the concrete block, the jumping of the concrete block in the vertical direction is restrained, the lower pressing plate can be jacked up when the concrete block is not clamped through the elastic force of the reset spring rod 86, and the lower pressing plate is prevented from falling under the action of gravity to prevent the concrete block from being clamped well.
Embodiment four:
as shown in fig. 3 to 6, the upper surface of the clamping mounting block 71 is provided with a repositioning groove 711, the upper end of the repositioning groove 711 is slidably connected with the clamping plate 72, two side walls of the repositioning groove 711 are uniformly provided with tooth grooves 712, two opposite side surfaces of the tooth grooves 712 are in an inclined plane shape, and the clamping plate 72 is provided with an automatic positioning mechanism 9 engaged with the side surface of the repositioning groove 711.
In order to fix the concrete blocks with irregular sections in the process of fixing the concrete blocks, when the pressing plate 85 is pressed against the upper ends of the concrete blocks, the pre-pressing block 81 drives the clamping plates 72 to slide along the fixed sliding grooves 21, and when all the pressing plates 85 press the upper end faces of the concrete, the automatic positioning mechanisms 9 are clamped in tooth grooves 712 at the edges of the repositioning grooves 711, so that the concrete is completely fixed.
Fifth embodiment:
as shown in fig. 3 to 6, the automatic positioning mechanism 9 includes a gripping mechanism 91 and a pushing mechanism 92, the gripping mechanism 91 includes a gripping plate 911, a pressing spring 912 and a pushing rod 913, a notch is formed at the lower end of the gripping plate 72, the gripping plate 911 is disposed in the notch, the gripping plate 911 faces the left and right side walls of the repositioning groove 711, a convex tooth engaged with the tooth groove 712 of the repositioning groove 711 is formed on the gripping plate 911, the gripping plate 911 is slidably connected with the gripping plate 72, a pressing spring 912 is fixedly mounted between the gripping plate 911 and the bottom surface of the notch at the lower end of the gripping plate 72, the pushing rod 913 is fixedly mounted at the middle position of the gripping plate 911, the pushing rod 913 is slidably inserted into the gripping plate 72, and the pushing mechanism 92 for pressing the pushing rod 913 is disposed in the gripping plate 72.
When the clamping plate 72 is fixed through the automatic positioning mechanism 9, the clamping plate 911 is clamped at the position between the two jacking connecting rods 913 through the jacking mechanism 92, so that the clamping plate 911 is clamped into the tooth grooves 712 on the side wall of the repositioning groove 711, the clamping plate 72 can be fixed in the repositioning groove 711, meanwhile, the elastic coefficient of the pressing spring 912 is far greater than that of the reset spring rod 86, the pressing spring 912 can tightly press the clamping plate 911 into the notch of the tooth groove 712, and very large resistance is generated when the clamping plate 72 slides along the repositioning groove 711, so that the clamping plate 72 can slide along the repositioning groove 711 when the lower pressing plate is pressed onto concrete.
Example six:
as shown in fig. 3 to 6, the jacking mechanism 92 includes a jacking rod 921 and a vertical moving plate 922, the clamping plate 72 is provided with a vertical sliding groove 722 along a vertical direction, the vertical sliding groove 722 is slidably connected with the jacking rod 921, an upper end of the jacking rod 921 extends into the through groove 721, two side ends of a lower end of the jacking rod 921, which face the gripping plate 911, are inclined, a lower end of the jacking rod 921 is in an inclined surface and is in sliding contact with the jacking rod 913, the upper end of the jacking rod 921 is fixedly connected with the vertical moving plate 922, and a pressing mechanism 93 for applying pressure to the vertical moving plate 922 is arranged in the through groove 721.
When the position between the two jacking connecting rods 913 is clamped through the jacking mechanism 92, the vertical moving plate 922 is controlled to move along the vertical direction through the pressing mechanism 93, the vertical moving plate 922 drives the jacking rod 921 to be clamped between the two jacking connecting rods 913, and the lower end of the jacking rod 921 is processed into an inclined plane shape, so that the jacking rod 921 can smoothly enter between the two jacking connecting rods 913.
Further, the jacking mechanism 93 includes a vertical guide bar 931 and a vertical moving screw 932, the vertical guide bar 931 is fixedly installed on a lower bottom surface of the through slot 721, the vertical moving plate 922 is slidably connected to the vertical guide bar 931 in a vertical direction, the vertical moving screw 932 is rotatably connected to an upper end of the through slot 721, and the vertical moving screw 932 is threadedly connected to the vertical guide bar 931.
The vertical guide screw is screwed with the vertical moving plate 922 by rotating the vertical guide screw, so that the vertical moving plate 922 moves in the vertical direction, and the vertical guide bar 931 can make the vertical moving plate 922 more stable in the vertical movement.
The working principle of the invention is that in the concrete working process, a concrete block with an anchor bolt fixed at the upper end is placed at the upper end of the middle of a concrete fixing plate 2, then the concrete is fixedly installed on the concrete fixing plate 2 through a concrete fixing device 7, then a front sliding rod 5 and a rear sliding rod 5 are controlled to move along the front and rear direction through a hydraulic cylinder and other devices, a lifting device 6 on a lifting plate 4 is aligned with the anchor bolt on the concrete block, the anchor bolt is fixed on the lifting device 6, the lifting device 6 can be composed of a hydraulic telescopic cylinder and a tension sensor, then a pulse oscillation wave is sent to the concrete fixing plate through a vibration generating device 3, the vibration generating device 3 is connected with an external computer control system, the destructive disconnection of the anchor bolt and the concrete block is calculated under the condition of the number of times of oscillation, the tension fatigue test data of the anchor bolt is obtained by combining the tension sensor in the lifting device 6, the anchor bolt and the fixing position of the anchor bolt and the concrete can be subjected to the tension fatigue test in the vertical direction through the device, in the process of fixing the concrete through the concrete fixing device 7, the driving gear 223 is driven by an external driving device such as a motor to rotate, the driven gear 222 is driven by the driving gear 223 to rotate, the synchronous sliding disc 22 is driven by the driven gear 222 to rotate, the synchronous sliding disc 22 and the clamping installation block 71 slide mutually, the clamping installation block 71 drives the clamping plate 72 to clamp the concrete block, thus, the cylindrical concrete block can be fixed under the condition of meeting the requirement of carrying out the tension fatigue test on the anchor bolt in the vertical direction, in order to restrain the displacement of the concrete block in the vertical direction when the clamping plate 72 is close to the concrete block, the pre-jacking block 81 is firstly contacted with the concrete block, at this time, the pre-jacking block 81 and the conducting rack 83 can relatively slide relative to the clamping plate 72, the conducting rack 83 can relatively mesh with the jacking gear 82 to enable the jacking gear 82 to rotate, the jacking gear 82 can mesh with the jacking rack 84 to enable the jacking rack 84 to drive the jacking plate 85 to move downwards, all the jacking plates 85 synchronously move downwards to press the concrete block, the jumping of the concrete block along the vertical direction is restrained, the lower pressing plate can be jacked up when the concrete block is not clamped through the elastic force of the reset spring rod 86, the lower pressing plate is prevented from falling under the action of gravity to enable good clamping when the concrete block is clamped, in order to enable the concrete block with irregular cross section to be fixed in the process of fixing the concrete block, when the jacking plate 85 is jacked on the upper end of the concrete block, the pre-jacking block 81 can drive the clamping plate 72 to slide along the fixed sliding groove 21, and when all the jacking plates 85 are pressed on the upper end face of the concrete block in a pressure mode, the automatic positioning mechanism 9 is clamped in the tooth groove edge of the concrete block 712, and accordingly the concrete block is completely fixed.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the foregoing examples, and that the foregoing description and description are merely illustrative of the principles of this invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides an crab-bolt tensile fatigue testing machine, includes bottom fixed plate (1), its characterized in that: the upper end of the bottom fixing plate (1) is fixed with a concrete fixing plate (2);
the vibration generating device (3) is arranged at the lower end of the concrete fixing plate (2), and the lower end of the vibration generating device (3) is fixedly arranged on the concrete fixing plate (2);
the positioning sliding grooves (11) are symmetrically arranged on the bottom fixing plate (1);
a hanging plate (4), wherein the hanging plate (4) is arranged at the upper end of the concrete fixing plate (2);
the front and rear sliding rods (5), the front and rear sliding rods (5) are fixedly arranged at the lower ends of the left side and the right side of the hanging plate (4), and the front and rear sliding rods (5) are in sliding connection with the positioning sliding grooves (11);
the lifting device (6) is arranged at the lower end of the hanging plate (4), and the vertical center line of the lifting device (6) and the vertical center line of the vibration generating device (3) are on the same straight line;
and the concrete fixing device (7) is arranged on the concrete fixing plate (2).
2. The anchor bolt tension fatigue testing machine according to claim 1, wherein: the concrete fixing device (7) comprises clamping installation blocks (71), fixed sliding grooves (21) distributed circumferentially are formed in the concrete fixing plate (2), reverse extension lines of the fixed sliding grooves (21) converge to a point, included angles between adjacent fixed sliding grooves (21) are the same, the clamping installation blocks (71) are connected in the fixed sliding grooves (21) in a sliding mode, and clamping plates (72) are arranged at the upper ends of the clamping installation blocks (71);
the lower extreme rotation of concrete fixed plate (2) is connected with synchronous sliding tray (22), set up spiral form deflection spout (221) on synchronous sliding tray (22), deflection spout (221) circumference distributes and has a plurality ofly, and deflection spout (221) with centre gripping installation piece (71) are corresponding to be set up, deflection spout (221) with centre gripping installation piece (71) sliding connection, the outside cover of synchronous sliding tray (22) is equipped with driven gear (222), the outside meshing of driven gear (222) has driving gear (223).
3. The anchor bolt tension fatigue testing machine according to claim 2, wherein: the clamping plate (72) is fixedly provided with a jacking device (8), the jacking device (8) comprises a pre-jacking block (81), the pre-jacking block (81) is arranged at one end of the clamping plate (72) facing the central shaft of the concrete fixing plate (2), one end of the pre-jacking block (81) facing the clamping plate (72) is fixedly provided with a lateral rod (811), the lateral rod (811) is in sliding connection with the clamping plate (72), the middle position of the clamping plate (72) is provided with a through groove (721), and the clamping plate (72) is rotationally connected with a jacking gear (82) at the position corresponding to the through groove (721);
the utility model discloses a clamp plate, including clamp plate (72), tip block (81) in advance, tip block (81) are provided with conduction rack (83) in the lower extreme fixed mounting of side direction pole (811), conduction rack (83) with tip gear (82) are mutually meshed, conduction rack (83) still with clamping plate (72) sliding connection, still sliding connection has tip rack (84) along vertical direction on clamping plate (72), tip rack (84) rack are provided with one respectively in conduction rack (83) both sides, tip rack (84) with tip gear (82) are meshed, the upper end of tip rack (84) runs through the upper end of clamping plate (72), and the upper end of two tip racks (84) is fixedly connected with a tip plate (85) jointly, tip plate (85) with a reset spring bar (86) of fixed connection between the upper end of clamping plate (72).
4. The anchor bolt tension fatigue testing machine according to claim 3, wherein: the upper surface of centre gripping installation piece (71) has seted up and has been changed position groove (711), the upper end of changing position groove (711) with grip block (72) sliding connection, tooth's socket (712) have evenly been seted up to the both sides wall of changing position groove (711), two opposite sides of tooth's socket (712) are the inclined plane form, be provided with on grip block (72) with change position groove (711) side looks interlock automatic positioning mechanism (9).
5. The anchor bolt tension fatigue testing machine as recited in claim 4, wherein: the automatic positioning mechanism (9) comprises a snapping mechanism (91) and a jacking mechanism (92),
the utility model provides a clutch mechanism (91) is including interlock board (911), push in spring (912) and top and close pole (913), notch has been seted up to the lower extreme of grip block (72), be provided with in the notch and interlock board (911), the left and right sides wall of interlock board (911) towards repositioning groove (711), and processing has the dogtooth that agrees with tooth groove (712) on repositioning groove (711) on interlock board (911), interlock board (911) with grip block (72) sliding connection, snap block (911) with fixed mounting has push in spring (912) between the bottom surface of the notch of grip block (72) lower extreme, the intermediate position fixed mounting of interlock board (911) has top and closes pole (913), top and close pole (913) sliding insertion in grip block (72), be provided with in grip block (72) and be used for pressfitting top and close pole (913) top and close mechanism (92).
6. The anchor bolt tension fatigue testing machine as recited in claim 5, wherein: the pushing mechanism (92) comprises a pushing rod (921) and a vertical moving plate (922), a vertical sliding groove (722) is formed in the clamping plate (72) along the vertical direction, the pushing rod (921) is connected to the vertical sliding groove (722) in a sliding mode, the upper end of the pushing rod (921) stretches into the through groove (721), two side ends, facing the biting plate (911), of the lower end of the pushing rod (921) are in an inclined plane shape, the lower end of the pushing rod (921) is in inclined plane shape and is in sliding contact with the pushing rod (913), the vertical moving plate (922) is fixedly connected to the upper end of the pushing rod (921), and a pressing mechanism (93) for applying pressure to the vertical moving plate (922) is arranged in the through groove (721).
7. The anchor bolt tension fatigue testing machine as recited in claim 6, wherein: the pressing mechanism (93) comprises a vertical guide rod (931) and a vertical moving screw rod (932), the vertical guide rod (931) is fixedly arranged on the lower bottom surface of the through groove (721), the vertical moving plate (922) is in sliding connection with the vertical guide rod (931) along the vertical direction, the vertical moving screw rod (932) is in rotary connection with the upper end of the through groove (721), and the vertical moving screw rod (932) is in threaded connection with the vertical guide rod (931).
8. The anchor bolt tension fatigue testing machine according to any one of claims 1-7, wherein: the vibration generating device (3) consists of a pulsation hydraulic source, a digital control system and a computer data acquisition system.
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| CN117589608B (en) | 2024-04-12 |
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