Displacement measuring device for anchor cable pull-out test

Abstract

The invention discloses a displacement measuring device for an anchor cable pull-out test, and relates to the technical field of measuring devices for pull-out tests. The device comprises a hollow jack, a bearing plate is arranged on the rear side of the hollow jack, an anchorage device is arranged on the front side of the hollow jack, a measuring device is arranged outside the front side of the hollow jack, the measuring device comprises a fixing ring, and the fixing ring is fixed outside the hollow jack. And a cross-shaped groove box is rotationally installed outside the fixing ring, rotating blocks are fixed to the inner walls of four groove openings of the cross-shaped groove box, and a U-shaped frame is fixed to the side, away from the hollow jack, of each rotating block. Through the arrangement of the measuring device, the cross groove box drives the second telescopic rod and the notch clamp to move to the anchor cable through the rotating block, so that the positions of the encoder and the rope can be adjusted according to the actual situation of the anchor cable, and then the accuracy of displacement data measured by the anchor cable is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring devices for pull-out tests, and particularly to a displacement measuring device for anchor cable pull-out tests. Background Technique

[0002] The displacement measuring device for anchor cable pull-out tests is used to measure the displacement changes that occur during the pull-out of the anchor cable. Usually, a displacement sensor is used in conjunction with a data acquisition system. By accurately measuring the elongation or movement of the anchor cable, the deformation conditions during the pull-out process are monitored in real time to ensure the accuracy and reliability of the test results. This is crucial for evaluating the performance of the anchoring system.

[0003] Chinese Patent with Patent Publication No. CN216669534U discloses a displacement measuring device for anchor cable pull-out tests, including: a support, a connecting member, a pulling mechanism, a first wire-type displacement sensor, and a data acquisition instrument; the first wire-type displacement sensor is fixed to the support, the support is used to be arranged around the anchor cable, the first wire-type displacement sensor has a first wire, the free end of the first wire is connected to the anchor cable through the connecting member, the axis of the first wire is parallel to the axis of the anchor cable, and the first wire-type displacement sensor is used to detect the displacement of the anchor cable; the pulling mechanism is used to apply a pulling force to the anchor cable; the data acquisition instrument is connected to the first wire-type displacement sensor through a cable and is used to collect displacement data. The displacement measuring device for anchor cable pull-out tests of this patent ensures the continuous, accurate, and safe acquisition of displacement data during the anchor cable pull-out test, which is beneficial to improving work efficiency.

[0004] However, the current displacement measuring device has the following problems: This displacement measuring device is not convenient for adjusting the positions between the wire-type displacement sensor and the connecting member and the anchor cable, so the angles of the wire-type displacement sensor and the connecting member cannot be adjusted according to the actual situation of the anchor cable, which in turn leads to errors in the measured displacement data. Therefore, we have proposed a displacement measuring device for anchor cable pull-out tests. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a displacement measuring device for anchor cable pull-out tests, which solves the problems put forward in the above background technique.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A displacement measuring device for a cable anchor pulling test, including a hollow jack, a bearing plate is arranged at the rear side of the hollow jack, an anchor is arranged at the front side of the hollow jack, a measuring device is arranged outside the front side of the hollow jack, the measuring device includes a fixing ring, the fixing ring is fixed on the outside of the hollow jack, a cross slot box is rotatably installed outside the fixing ring, rotating blocks are fixed on the inner walls of the four slots of the cross slot box, a U-shaped frame is fixed on the side of the rotating block away from the hollow jack, a wire reel is rotatably installed on the side of the U-shaped frame close to the rotating block, a wire rope is wound around the outside of the wire reel, an encoder is fixed on the side of the U-shaped frame away from the rotating block, the output end of the encoder is fixedly connected to the rotating shaft of the wire reel, telescopic rods one are fixed on both sides of the outer wall of the rotating block, locking components are arranged at the ends of the two telescopic rods one away from the rotating block, the locking components include telescopic rods two, notch clamps, and fastening bolts, the fixed end of the telescopic rod two is fixed between the ends of the two telescopic rods one away from the rotating block, the notch clamp is fixed on the telescopic end of the telescopic rod two, the fastening bolt is arranged on the side of the notch clamp away from the telescopic rod two, the end of the wire rope away from the wire reel is fixed on the outer wall of the fixed end of the telescopic rod two, a limiting component is arranged at the rear side of the cross slot box, the limiting component includes an L-shaped side plate and a positioning bolt, the L-shaped side plate is fixed on the rear side of the cross slot box, the positioning bolt penetrates and is threadedly connected to the side of the L-shaped side plate away from the hollow jack. The cross slot box drives the telescopic rod two and the notch clamp to move to the cable anchor through the rotating block and the telescopic rod one, the notch clamp is sleeved outside the cable anchor, and the notch clamp is fastened by the fastening bolt. At this time, the fixation between the notch clamp and the cable anchor is completed. During the cable anchor pulling test, the hollow jack will push the anchor and the cable anchor to displace. The cable anchor drives the telescopic rod two to displace through the notch clamp. The telescopic rod two stretches the wire rope. The wire rope drives the wire reel to rotate. The wire reel drives the output end of the encoder to rotate. The encoder will calculate the displacement distance of the pulling rope, so as to realize the data feedback of the displacement distance of the cable anchor.

[0007] According to the above technical solution, reinforcing ribs are fixed between the rotating block and the two telescopic rods one, and the reinforcing ribs are used to improve the stability between the rotating block and the two telescopic rods one.

[0008] According to the above technical solution, support rods are slidably installed on the sides of the fixed ends of the two telescopic rods one away from the hollow jack. One end of the support rod is fixed on the outer wall of the telescopic end of the telescopic rod one. When the telescopic rod two displaces, the telescopic rod two will drive the telescopic end of the telescopic rod one to stretch. The telescopic end of the telescopic rod one drives the support rod to slide along the outer wall of the fixed end of the telescopic rod one. The support rod can provide stable support for the telescopic rod one.

[0009] According to the above technical solution, a T-shaped frame is fixed between the sides of the fixed ends of the two telescopic rods I away from the hollow jack. A limiting wheel is rotatably installed on the side of the T-shaped frame away from the telescopic rod I. The limiting wheel is in contact with the outer wall of the wire rope. The limiting wheel limits the wire release height of the wire rope, so as to ensure that the wire rope is in a horizontal state during the process of the telescopic rod II driving the wire rope to move and release the wire.

[0010] According to the above technical solution, an adjusting device is arranged on the front side of the measuring device. The adjusting device includes a rotating ring, four sliders, four T-shaped rods, and four connecting rods. The four T-shaped rods are respectively fixed on the front sides of the four rotating blocks. The four sliders are respectively slidably installed outside the four T-shaped rods, and springs are arranged between the sliders and the T-shaped rods. The rotating ring is rotatably installed among the four sliders. Four elastic telescopic columns are uniformly fixed on the front circumference of the rotating ring. The four connecting rods are respectively fixed on the rear sides of the telescopic ends of the four telescopic rods II. One ends of the four connecting rods away from the center of the hollow jack are all fixed with inclined groove plates. An inclined groove is opened on the rear side of the inclined groove plate. The ends of the elastic telescopic columns away from the rotating ring are slidably installed in the inclined grooves of the inclined groove plates. Moving the rotating ring in the direction away from the cross groove box, the rotating ring drives the sliders to move along the outside of the T-shaped rods. The springs corresponding to the sliders are compressed, and the rotating ring applies pressure to the elastic telescopic columns. The telescopic ends of the elastic telescopic columns contract. At the same time, the rotating ring drives the tooth grooves of the toothed ring to separate from the tooth blocks. At this time, the tooth blocks do not limit the position of the rotating ring through the toothed ring. Rotating the rotating ring, the rotating ring drives the elastic telescopic columns to rotate. The telescopic ends of the elastic telescopic columns slide along the inclined grooves inside the inclined groove plates. The telescopic ends of the elastic telescopic columns push the inclined groove plates to drive the connecting rods to move. The connecting rods drive the telescopic ends of the telescopic rods II to stretch or contract, so that the telescopic ends of the telescopic rods II drive the notch clips to move, and the notch clips will correct the position of the anchor cable.

[0011] According to the above technical solution, tooth blocks are fixed on the front sides of the four rotating blocks, and a toothed ring is fixed on the rear side of the rotating ring. The tooth blocks are in contact with the tooth grooves of the toothed ring. After the notch clip corrects the position of the anchor cable, release the rotating ring. Under the elastic force of the springs corresponding to the sliders, the sliders drive the rotating ring to reset. The rotating ring drives the tooth grooves of the toothed ring to coincide with the tooth blocks. At this time, the position of the rotating ring will be fixed, and the rotating ring fixes the position of the notch clip through the elastic telescopic columns, inclined groove plates and connecting rods.

[0012] The L-shaped spring rod is fixed on both sides of the outer wall of the swivel, and the triangular arc strip is fixed on both sides of the outer wall of the cross slot box. The cross bar of the L-shaped spring rod is arranged in a triangular shape on the side close to the cross slot box, and the vertical surface of the triangular arc strip is arranged toward the rear side. The triangular vertical surface of the L-shaped spring rod contacts the vertical surface of the triangular arc strip. Before pushing the swivel to move each time, it is necessary to first push the L-shaped spring rod so that the triangular vertical surface of the L-shaped spring rod is staggered with the vertical surface of the triangular arc strip, and the triangular arc strip no longer limits the position of the swivel through the L-shaped spring rod. At this time, the swivel can move, and when the swivel is reset, the swivel will drive the triangular vertical surface of the L-shaped spring rod to offset the vertical surface of the triangular arc strip, and the triangular arc strip will limit the position of the swivel through the L-shaped spring rod.

[0013] The present invention provides a displacement measuring device for anchor cable pullout testing. It has the following beneficial effects: (1) The present invention sets up a measuring device so that the cross slot box drives the telescopic rod 2 and the notch clamp to move to the anchor cable through the rotating block, so that the position of the encoder and the rope can be adjusted according to the actual situation of the anchor cable, thereby ensuring the accuracy of the displacement data measured by the anchor cable.

[0014] (2) The present invention provides a support rod to provide stable support for the telescopic rod 1, thereby preventing the telescopic rod 1 from excessive bending or deformation during the displacement process; at the same time, the limiting wheel will limit the line-laying height of the rope, thereby ensuring that the rope is in a horizontal state during the line-laying process when the telescopic rod 2 drives the rope to move, thereby avoiding the problem of deviation in the height of the rope, resulting in a change in the angle between the rope and the anchor cable, and then causing displacement measurement errors.

[0015] (3) The present invention uses the setting of the adjustment device to make the swivel, slider, T-shaped rod, gear ring and tooth block cooperate, and the connecting rod drives the telescopic end of the telescopic rod 2 to stretch or retract, so that the telescopic end of the telescopic rod 2 drives the notch clamp to move, and the notch clamp will deflect the position of the anchor cable, and the displacement ensures that the anchor cable and the anchor are in a horizontal state. Keeping the anchor cable level can ensure the consistency of each test condition, reduce the change of experimental results caused by different anchor cable angles, and thus improve the reliability of the test data; at the same time, each time the swivel is reset, the triangular arc bar limits the position of the swivel through the L-shaped elastic rod, thereby avoiding the problem that when the anchor cable is displaced, the anchor cable drives the swivel to move through the elastic telescopic column, the inclined groove plate and the connecting rod, and the swivel drives the tooth groove of the gear ring to be offset from the tooth block, resulting in the notch clamp not fixing the deflected anchor cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the present invention as a whole Figure 1 ; Figure 2 This is a schematic diagram of the present invention as a whole Figure 2 ; Figure 3 For the present invention Figure 2 Schematic enlarged view of the structure at position A of the present invention; Figure 4 Schematic diagram of the measuring device of the present invention; Figure 5 Schematic diagram of the partial structure of the measuring device of the present invention Figure 1 ; Figure 6 Schematic diagram of the partial structure of the measuring device of the present invention Figure 2 ; Figure 7 Schematic diagram of the adjusting device of the present invention Figure 1 ; Figure 8 Schematic diagram of the adjusting device of the present invention Figure 2 .

[0017] In the figure: 1, hollow jack; 2, bearing plate; 3, anchor; 4, measuring device; 41, fixed ring; 42, cross groove box; 43, rotating block; 44, wire reel; 45, wire rope; 46, U-shaped frame; 47, encoder; 48, first telescopic rod; 49, second telescopic rod; 410, reinforcing rib; 411, notch clip; 412, fastening bolt; 413, support rod; 414, limiting wheel; 415, T-shaped frame; 416, L-shaped side plate; 417, positioning bolt; 5, adjusting device; 51, swivel ring; 52, slider; 53, T-shaped rod; 54, elastic telescopic column; 55, inclined groove plate; 56, connecting rod; 57, tooth block; 58, toothed ring; 59, L-shaped elastic rod; 510, triangular arc bar. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Please refer to Figure 1 - Figure 8 , the present invention provides a technical solution: a displacement measuring device for a cable anchor pulling test, including a hollow jack 1, a bearing plate 2 is arranged at the rear side of the hollow jack 1, an anchor 3 is arranged at the front side of the hollow jack 1, a measuring device 4 is arranged outside the front side of the hollow jack 1, the measuring device 4 includes a fixed ring 41, the fixed ring 41 is fixed outside the hollow jack 1, and a cross groove box 42 is rotatably installed outside the fixed ring 41 (as Figure 4As shown in the figure, rotating blocks 43 are fixed at the inner walls of the four notches of the cross-slot box 42. A U-shaped frame 46 is fixed on the side of the rotating block 43 away from the hollow jack 1. A wire reel 44 is rotatably installed on the side of the U-shaped frame 46 close to the rotating block 43. A wire rope 45 is wound around the outer part of the wire reel 44. An encoder 47 is fixed on the side of the U-shaped frame 46 away from the rotating block 43. The output end of the encoder 47 is fixedly connected to the rotating shaft of the wire reel 44. On both sides of the outer wall of the rotating block 43, a first telescopic rod 48 is fixed. A locking assembly is arranged at the ends of the two first telescopic rods 48 away from the rotating block 43. The locking assembly includes a second telescopic rod 49, a notch clip 411, and a fastening bolt 412. The fixed end of the second telescopic rod 49 is fixed between the ends of the two first telescopic rods 48 away from the rotating block 43. The notch clip 411 is fixed at the telescopic end of the second telescopic rod 49. The fastening bolt 412 is arranged on the side of the notch clip 411 away from the second telescopic rod 49. The end of the wire rope 45 away from the wire reel 44 is fixed at the outer wall of the fixed end of the second telescopic rod 49. A limiting assembly (as shown in Figure 3 is arranged at the rear side of the cross-slot box 42. The limiting assembly includes an L-shaped side plate 416 and a positioning bolt 417. The L-shaped side plate 416 is fixed at the rear side of the cross-slot box 42. The positioning bolt 417 passes through and is threadedly connected to the side of the L-shaped side plate 416 away from the hollow jack 1. Through the setting of the above structure, the cross-slot box 42 drives the second telescopic rod 49 and the notch clip 411 to move to the anchor cable through the rotating block 43, so that the positions of the encoder 47 and the wire rope 45 can be adjusted according to the actual situation of the anchor cable, and further ensure the accuracy of the displacement data measured by the anchor cable.

[0020] Reinforcing ribs 410 are fixed between the rotating block 43 and the two first telescopic rods 48 (as shown in Figure 6 ). The reinforcing ribs 410 are used to improve the stability between the rotating block 43 and the two first telescopic rods 48.

[0021] Support rods 413 are slidably installed on the sides of the fixed ends of the two first telescopic rods 48 away from the hollow jack 1. One end of the support rod 413 is fixed at the outer wall of the telescopic end of the first telescopic rod 48. Through the setting of the above structure, the support rod 413 provides stable support for the first telescopic rod 48, preventing the first telescopic rod 48 from being overly bent or deformed during the displacement process.

[0022] A T-shaped frame 415 is fixed between the fixed ends of the two telescopic rods 48 on the side far from the hollow jack 1. A limiting wheel 414 is rotatably installed on the side of the T-shaped frame 415 far from the telescopic rod 48. The limiting wheel 414 is in contact with the outer wall of the wire rope 45. Through the setting of the above structure, the limiting wheel 414 limits the pay-off height of the wire rope 45, so as to ensure that the wire rope 45 is in a horizontal state during the process of the telescopic rod 49 driving the wire rope 45 to move and pay off, thus avoiding the problem that the height of the wire rope 45 has a deviation, resulting in a change in the angle between the wire rope 45 and the anchor cable, and further causing a displacement measurement error.

[0023] An adjusting device 5 is arranged on the front side of the measuring device 4. The adjusting device 5 includes a swivel ring 51, four sliders 52, four T-shaped rods 53, and four connecting rods 56. The four T-shaped rods 53 are respectively fixed on the front sides of the four rotating blocks 43. The four sliders 52 are respectively slidably installed outside the four T-shaped rods 53, and a spring is arranged between the slider 52 and the T-shaped rod 53. The swivel ring 51 is rotatably installed between the four sliders 52. Four elastic telescopic columns 54 are uniformly fixed on the front circumferential side of the swivel ring 51. The four connecting rods 56 are respectively fixed on the rear sides of the telescopic ends of the four telescopic rods 49. One end of each of the four connecting rods 56 far from the center of the hollow jack 1 is fixed with an inclined groove plate 55. An inclined groove is opened on the rear side of the inclined groove plate 55. One end of the elastic telescopic column 54 far from the swivel ring 51 is slidably installed inside the inclined groove of the inclined groove plate 55. Through the setting of the above structure, the connecting rod 56 drives the telescopic end of the telescopic rod 49 to stretch or contract, so that the telescopic end of the telescopic rod 49 drives the notch clip 411 to move, and the notch clip 411 will correct the position of the anchor cable, so as to ensure that the anchor cable and the anchor 3 are in a horizontal state. Keeping the anchor cable horizontal can ensure the consistency of each test condition, reduce the change of test results caused by different angles of the anchor cable, and thus improve the reliability of test data.

[0024] Tooth blocks 57 are fixed on the front sides of the four rotating blocks 43, and a toothed ring 58 is fixed on the rear side of the swivel ring 51. The tooth blocks 57 are in contact with the tooth grooves of the toothed ring 58. Through the setting of the above structure, the swivel ring 51 drives the tooth grooves of the toothed ring 58 to coincide with the tooth blocks 57. At this time, the position of the swivel ring 51 will be fixed, and the swivel ring 51 fixes the position of the notch clip 411 through the elastic telescopic column 54, the inclined groove plate 55 and the connecting rod 56, so that the notch clip 411 can fix the corrected anchor cable.

[0025] L-shaped spring rods 59 are fixed on both sides of the outer wall of the swivel 51, and triangular arc strips 510 are fixed on both sides of the outer wall of the cross slot box 42. The cross bar of the L-shaped spring rod 59 is triangularly arranged on the side close to the cross slot box 42, and the vertical surface of the triangular arc strip 510 is arranged toward the rear side. The triangular vertical surface of the L-shaped spring rod 59 contacts the vertical surface of the triangular arc strip 510. Through the arrangement of the above structure, when the swivel 51 is reset, the triangular arc strip 510 will limit the position of the swivel 51 through the L-shaped spring rod 59, thereby avoiding the problem that when the anchor cable is displaced, the anchor cable drives the swivel 51 to displace through the elastic telescopic column 54, the inclined groove plate 55 and the connecting rod 56, and the swivel 51 drives the tooth groove of the gear ring 58 to be staggered with the tooth block 57, resulting in the problem that the notch clamp 411 does not fix the deflected anchor cable.

[0026] When in use, after the anchor cable passes through the pressure plate 2, the hollow jack 1 and the anchor 3 in sequence, the cross slot box 42 is rotated, and the cross slot box 42 drives the telescopic rod 2 49 and the notch clamp 411 to move to the anchor cable through the rotating block 43 and the telescopic rod 1 48, and the notch clamp 411 is put on the outside of the anchor cable, and the notch clamp 411 is tightened by the fastening bolt 412. At this time, the fixation between the notch clamp 411 and the anchor cable is completed. When the anchor cable pulling test is carried out, the hollow jack 1 will push the anchor 3 and the anchor cable to move, and the anchor cable is brought by the notch clamp 411. The telescopic rod 2 49 is displaced, and the telescopic rod 2 49 stretches the rope 45. The rope 45 drives the pay-out wheel 44 to rotate, and the pay-out wheel 44 drives the output end of the encoder 47 to rotate. The encoder 47 calculates the displacement distance of the pull rope, thereby realizing data feedback on the displacement distance of the anchor cable. The cross slot box 42 drives the telescopic rod 2 49 and the notch clamp 411 to move to the anchor cable through the rotating block 43, so that the position of the encoder 47 and the rope 45 can be adjusted according to the actual situation of the anchor cable, thereby ensuring the accuracy of the displacement data measured by the anchor cable.

[0027] It should be noted that after the position adjustment of the cross slot box 42 is completed, the positioning bolt 417 is rotated. Under the action of the thread between the positioning bolt 417 and the L-shaped side plate 416, the positioning bolt 417 will move toward the direction of the hollow jack 1 until the positioning bolt 417 is against the outer wall of the hollow jack 1. At this time, the positioning bolt 417 will fix the position of the cross slot box 42.

[0028] When the telescopic rod 2 49 is displaced, the telescopic rod 2 49 will drive the telescopic end of the telescopic rod 1 48 to stretch, and the telescopic end of the telescopic rod 1 48 will drive the support rod 413 to slide along the outer wall of the fixed end of the telescopic rod 1 48. The support rod 413 can provide stable support for the telescopic rod 1 48 to prevent the telescopic rod 1 48 from excessive bending or deformation during the displacement process.

[0029] At the same time, the limiting wheel 414 will limit the pay-out height of the rope 45, thereby ensuring that the rope 45 is in a horizontal state during the pay-out process driven by the telescopic rod 2 49, thereby avoiding the height deviation of the rope 45, resulting in a change in the angle between the rope 45 and the anchor cable, and then causing the problem of displacement measurement error.

[0030] The swivel 51 is moved in the direction away from the cross slot box 42, and the swivel 51 drives the slider 52 to move along the outside of the T-shaped rod 53. The spring corresponding to the slider 52 is compressed, and the swivel 51 applies pressure to the elastic telescopic column 54. The telescopic end of the elastic telescopic column 54 contracts. At the same time, the swivel 51 drives the tooth groove of the gear ring 58 to separate from the tooth block 57. At this time, the tooth block 57 does not limit the position of the swivel 51 through the gear ring 58. The swivel 51 is rotated, and the swivel 51 drives the elastic telescopic column 54 to rotate. The telescopic end of the elastic telescopic column 54 moves along Sliding inside the inclined groove of the inclined groove plate 55, the telescopic end of the elastic telescopic column 54 pushes the inclined groove plate 55 to drive the connecting rod 56 to move, and the connecting rod 56 drives the telescopic end of the telescopic rod 2 49 to stretch or retract, so that the telescopic end of the telescopic rod 2 49 drives the notch clamp 411 to move, and the notch clamp 411 will correct the position of the anchor cable, thereby ensuring that the anchor cable and the anchor 3 are in a horizontal state. Keeping the anchor cable level can ensure the consistency of the test conditions each time, reduce the changes in experimental results caused by different anchor cable angles, and thus improve the reliability of the test data.

[0031] It should be noted that after the notch clamp 411 corrects the position of the anchor cable, the swivel 51 is loosened. Under the action of the spring force corresponding to the slider 52, the slider 52 drives the swivel 51 to reset, and the swivel 51 drives the tooth groove of the gear ring 58 to coincide with the tooth block 57. At this time, the position of the swivel 51 will be fixed, and the swivel 51 fixes the position of the notch clamp 411 through the elastic telescopic column 54, the inclined groove plate 55 and the connecting rod 56, so that the notch clamp 411 can fix the corrected anchor cable.

[0032] The triangular arc bar 510 will no longer limit the position of the swivel 51 through the L-shaped elastic rod 59. At this time, the swivel 51 can move. When the swivel 51 is reset, the swivel 51 will drive the triangular vertical surface of the L-shaped elastic rod 59 to offset the vertical surface of the triangular arc bar 510. The triangular arc bar 510 will limit the position of the swivel 51 through the L-shaped elastic rod 59, thereby avoiding the problem that when the anchor cable is displaced, the anchor cable drives the swivel 51 to displace through the elastic telescopic column 54, the inclined groove plate 55 and the connecting rod 56, and the swivel 51 drives the tooth groove of the gear ring 58 to be staggered with the tooth block 57, resulting in the problem that the notch clamp 411 does not fix the deflected anchor cable.

[0033] As described above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A displacement measuring device for an anchor cable pulling test, comprising a hollow jack (1), a bearing plate (2) is arranged at the rear side of the hollow jack (1), and an anchor fitting (3) is arranged at the front side of the hollow jack (1), and is characterized in that: A measuring device (4) is arranged on the outer side of the front side of the hollow jack (1). The measuring device (4) includes a fixing ring (41), the fixing ring (41) is fixed on the outside of the hollow jack (1), a cross-slot box (42) is rotatably installed on the outside of the fixing ring (41), rotating blocks (43) are fixed on the inner walls of the four slot openings of the cross-slot box (42), a U-shaped frame (46) is fixed on the side of the rotating block (43) away from the hollow jack (1), a wire-releasing wheel (44) is rotatably installed on the side of the U-shaped frame (46) close to the rotating block (43), a wire rope (45) is wound around the outside of the wire-releasing wheel (44), an encoder (47) is fixed on the side of the U-shaped frame (46) away from the rotating block (43), the output end of the encoder (47) is fixedly connected to the rotating shaft of the wire-releasing wheel (44), telescopic rods one (48) are fixed on both sides of the outer wall of the rotating block (43), locking assemblies are arranged at the ends of the two telescopic rods one (48) away from the rotating block (43), and a limiting assembly is arranged at the rear side of the cross-slot box (42).

2. The displacement measuring device for the anchor cable pulling test according to claim 1, characterized in that: The locking assembly includes a telescopic rod two (49), a notch clip (411), and a fastening bolt (412). The fixed end of the telescopic rod two (49) is fixed between the ends of the two telescopic rods one (48) away from the rotating block (43), the notch clip (411) is fixed at the telescopic end of the telescopic rod two (49), the fastening bolt (412) is arranged on the side of the notch clip (411) away from the telescopic rod two (49), and the end of the wire rope (45) away from the wire-releasing wheel (44) is fixed on the outer wall of the fixed end of the telescopic rod two (49).

3. The displacement measuring device for the anchor cable pulling test according to claim 1, wherein: The limiting assembly includes an L-shaped side plate (416) and a positioning bolt (417). The L-shaped side plate (416) is fixed at the rear side of the cross-slot box (42), and the positioning bolt (417) penetrates and is threadedly connected to the side of the L-shaped side plate (416) away from the hollow jack (1).

4. The displacement measuring device for the anchor cable pulling test according to claim 1, characterized in that: Reinforcing ribs (410) are fixed between the rotating block (43) and the two telescopic rods one (48), and the reinforcing ribs (410) are used to improve the stability between the rotating block (43) and the two telescopic rods one (48).

5. A displacement measuring device for an anchor cable pull-out test according to claim 1, characterized in that: Support rods (413) are slidably installed on the sides of the fixed ends of the two telescopic rods one (48) away from the hollow jack (1), and one end of the support rod (413) is fixed on the outer wall of the telescopic end of the telescopic rod one (48).

6. The displacement measuring device for the anchor cable pulling test according to claim 1, wherein: A T-shaped frame (415) is fixed between the sides of the fixed ends of the two telescopic rods one (48) away from the hollow jack (1), a limiting wheel (414) is rotatably installed on the side of the T-shaped frame (415) away from the telescopic rod one (48), and the limiting wheel (414) is in contact with the outer wall of the wire rope (45).

7. A displacement measuring device for a cable anchor pulling test according to claim 2, characterized in that: An adjusting device (5) is provided on the front side of the measuring device (4). The adjusting device (5) includes a swivel ring (51), four sliders (52), four T-shaped rods (53), and four connecting rods (56). The four T-shaped rods (53) are respectively fixed to the front sides of the four rotating blocks (43). The four sliders (52) are respectively slidably mounted on the outsides of the four T-shaped rods (53), and springs are provided between the sliders (52) and the T-shaped rods (53). The swivel ring (51) is rotatably mounted between the four sliders (52). Four elastic telescopic columns (54) are evenly fixed to the front side circumference of the swivel ring (51). The four connecting rods (56) are respectively fixed to the rear sides of the telescopic ends of the four second telescopic rods (49). The ends of the four connecting rods (56) far from the center of the hollow jack (1) are all fixed with inclined groove plates (55). An inclined groove is provided on the rear side of the inclined groove plate (55). The ends of the elastic telescopic columns (54) far from the swivel ring (51) are slidably mounted inside the inclined grooves of the inclined groove plates (55).

8. The displacement measuring device for the anchor cable pulling test according to claim 7, characterized in that: Tooth blocks (57) are fixed to the front sides of the four rotating blocks (43). A toothed ring (58) is fixed to the rear side of the swivel ring (51). The tooth blocks (57) are in contact with the tooth grooves of the toothed ring (58).

9. A displacement measuring device for an anchor cable pulling test according to claim 7, characterized in that: L-shaped elastic rods (59) are fixed to both sides of the outer wall of the swivel ring (51). Triangular arc strips (510) are fixed to both sides of the outer wall of the cross-slot box (42).

10. A displacement measuring device for an anchor cable pulling test according to claim 9, characterized in that: The cross-section of the horizontal bar of the L-shaped elastic rod (59) near the cross-slot box (42) is triangular. The vertical surface of the triangular arc strip (510) is arranged towards the rear side. The triangular vertical surface of the L-shaped elastic rod (59) is in contact with the vertical surface of the triangular arc strip (510).

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