Anchor cable meter

Abstract

The utility model belongs to the technical field of engineering monitoring equipment, and particularly relates to an anchor cable meter, which comprises a main body and a vibrating wire sensing assembly, a mounting hole is arranged on the main body, stepped hole structures are arranged at two ends of the mounting hole, and the vibrating wire sensing assembly comprises a base, a steel wire and a sensing coil. The base comprises a head part and a tail part, the tail part of the base comprises two extrusion plates, a threaded locking hole communicated with the mounting hole is formed in the side wall of the main body, and a locking screw extrudes the extrusion plates positioned in the mounting hole through the threaded locking hole, so that the two ends of the steel string are clamped between the two corresponding extrusion plates; and the induction coil is fixed on the main body so as to be used for detecting the vibration frequency of the steel string. According to the anchor cable meter, the steel string is fixed to the main body through the screws, and assembling and disassembling operation is easy; and the stepped hole structures of the plurality of stepped surfaces can be matched with bases of different models, so that steel strings of different lengths can be mounted, and the applicability is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering monitoring equipment, in particular to an anchor cable meter. Background Art

[0002] Anchor cable meters are commonly used in the construction industry and have been widely used to measure and monitor load and prestress loss in anchor rods, anchor cables, rock bolts, pillars, tunnel and underground cavern support structures, and large prestressed reinforced concrete structures. The operating principle of most common anchor cable meters is based on vibrating string theory. This theory states that when a load acts on the anchor cable meter, the tension of the internal steel string (vibrating string) changes with the magnitude of the stress, thereby changing its vibration frequency. By exciting the steel string with an electromagnetic induction coil and measuring its vibration frequency, the magnitude of the stress on the anchor cable meter can be calculated. Therefore, the installation accuracy of the steel string (vibrating string) has a significant impact on the anchor cable meter's measurement results. However, traditional vibrating string anchor cable meters typically adopt an integrated design, with the vibrating string typically welded to the load-bearing structure. This not only makes assembly difficult, but also generally only allows for installation of a fixed length of steel string. During use, the length of the vibrating string cannot be quickly changed, and if the vibrating string structure is damaged, repair or replacement is extremely difficult. Therefore, the present application aims to provide an anchor cable meter that is simple to assemble and easy to maintain. Utility Model Content

[0003] The purpose of the utility model is to solve the deficiencies of the prior art and provide an anchor cable meter, which has the advantages of simple assembly, convenient maintenance and convenient installation of steel strings of different lengths.

[0004] The technical solution of the utility model is: an anchor cable meter, including a main body and a vibrating string sensing component, the main body is a hollow cylinder, and a mounting hole arranged along the axial direction of the main body is provided on the main body, and a step hole structure is provided at both ends of the mounting hole, the step hole structure includes a plurality of step surfaces, the vibrating string sensing component includes a base, a steel string and an induction coil; the base includes a head and a tail, and the head is confined in the step hole structure; a through hole is provided on the head, and the tail of the base includes two extrusion plates, a notch is formed between the two extrusion plates, and the through hole is connected to the notch; a threaded locking hole connected to the mounting hole is provided on the side wall of the main body, and the central axis of the threaded locking hole is perpendicularly intersected with the central axis of the corresponding mounting hole, and the locking screw extrude the extrusion plate located in the mounting hole through the threaded locking hole, so that the two ends of the steel string are clamped between the corresponding two extrusion plates; the induction coil is fixed on the main body for detecting the vibration frequency of the steel string.

[0005] Furthermore, the stepped hole structure includes two stepped surfaces.

[0006] Furthermore, the outer contour of the stepped hole structure is polygonal, circular or elliptical.

[0007] Furthermore, the shape of the head portion remains the same as the outline shape of the stepped hole structure.

[0008] Furthermore, the lower surface of the head is used to cooperate with the step surface in the step hole structure.

[0009] Furthermore, in each stepped hole structure at the same end of the main body, the corresponding stepped surfaces are located on the same plane, which facilitates alignment of the installed bases during actual use.

[0010] Furthermore, the base is designed in multiple models, and the heads of different models of bases are of different sizes. During installation, the heads of different models of bases can respectively cooperate with the step surfaces at different positions of the step hole structure, so that the base head is limited to different positions of the step hole structure to correspond to the installation of steel strings of different lengths.

[0011] Furthermore, there are multiple mounting holes, and the mounting holes are evenly distributed around the circumference of the main body.

[0012] Furthermore, the stepped hole structures at both ends of the mounting hole are symmetrical to each other.

[0013] Furthermore, when the base is installed, the extrusion plate at the tail maintains vertical contact with the locking screw.

[0014] Furthermore, the opposite sides of the extrusion plate are provided with textures to increase the clamping force on the steel strings.

[0015] Furthermore, a ring groove is provided in the middle of the main body, into which the induction coil can be mounted, and a protective cover is provided in the ring groove to protect the induction coil. A wire outlet hole is provided on the protective cover to facilitate the extraction of the relevant cables in the vibrating wire induction assembly.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The anchor cable meter in this utility model uses screws to fix the steel string to the main body. Compared with welding, the assembly operation is simple and it is easy to disassemble and maintain.

[0018] 2. In the present invention, by providing a stepped hole structure with multiple stepped surfaces and cooperating with bases of different models, it is possible to selectively install steel strings of various lengths on the same main body, thereby enhancing the versatility of the anchor cable meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of Example 1 of the present utility model;

[0020] Figure 2 This is an explosion diagram of Example 1 of the utility model;

[0021] Figure 3 This is a cross-sectional schematic diagram of Example 1 of the present utility model;

[0022] Figure 4 It is a three-dimensional schematic diagram of the main body in Example 1 of the present utility model;

[0023] Figure 5 It is a cross-sectional schematic diagram of the main body in Example 1 of the present utility model;

[0024] Figure 6 It is a schematic diagram of the base in Example 1 of the present utility model;

[0025] In the figure: 1. Main body; 11. Mounting hole; 12. Step hole structure; 13. Threaded locking hole; 14. Sensing hole; 15. Ring groove; 2. Base; 21. Head; 22. Extrusion plate; 23. Through hole; 24. Notch; 3. Steel string; 4. Induction coil; 5. Locking screw; 6. Protective cover; 7. Cable. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to specific embodiments. Methods or functional components not specifically described in the embodiments are all prior art. Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by technicians in the technical field of the present invention.

[0027] Example 1

[0028] like Figure 1-6 As shown, this embodiment is an anchor cable meter, comprising a main body 1 and a vibrating wire sensing assembly. The main body 1 is hollow cylindrical and is provided with a mounting hole 11 arranged along the axial direction of the main body. Step hole structures 12 are provided at both ends of the mounting hole 11. The vibrating wire sensing assembly comprises a base 2, a steel wire 3 and an induction coil 4. The base 2 comprises a head 21 and a tail. The head 21 is confined in the step hole structure 12. A through hole 23 is provided on the head 21. The tail of the base 2 comprises two extrusion plates 22. The two extrusion plates 22 A slot 24 is formed between the two holes 23, and the through hole 23 is connected to the slot 24; a threaded locking hole 13 connected to the mounting hole 11 is provided on the side wall of the main body 1, and the central axis of the threaded locking hole 13 is perpendicular to the central axis of the corresponding mounting hole 11. During assembly, the locking screw 5 passes through the threaded locking hole 13 and can extrude the extrusion plate 22 located in the mounting hole 11, so that the two ends of the steel string 3 are clamped between the corresponding two extrusion plates 22; the induction coil 4 is fixed on the main body 1 so as to be used to detect the vibration frequency of the steel string 3.

[0029] In this embodiment, the outer contour of the stepped hole structure 12 is hexagonal and includes two stepped surfaces. The corresponding stepped surfaces of each stepped hole structure 12 located at the same end of the main body 1 all lie on the same plane. The shape of the head 21 of the base 2 maintains the same contour as the stepped hole structure 12.

[0030] In this embodiment, the base 2 is designed in two models. The heads 21 of the bases 2 of different models are different in size. During installation, the heads 21 of the two models of the base 2 can respectively cooperate with the two step surfaces at different positions in the step hole structure 12, so that the head 21 of the base 2 is limited to different positions of the step hole structure 12 to correspond to the installation of steel strings 3 of different lengths.

[0031] In this embodiment, there are three mounting holes 11, and the mounting holes 11 are evenly distributed around the circumference of the main body 1. The stepped hole structures 12 at both ends of the mounting holes 11 are symmetrically arranged.

[0032] In this embodiment, the opposing sides of the two extrusion plates 22 are textured to increase the clamping force on the steel string 3. An annular groove 15 is provided in the middle of the main body 1. A sensing hole 14 is provided in the annular groove 15 at a position corresponding to the mounting hole 11. The induction coil 4 is mounted in the sensing hole 14 of the annular groove 15 and can sense the steel string 3 in the mounting hole 11. A protective cover 6 is provided in the annular groove 15 to protect the induction coil 4. The protective cover 6 has a wire outlet hole for facilitating the extraction of the associated cables 7 from the vibrating wire sensing assembly, thereby transmitting the measurement data to external monitoring equipment for display.

[0033] For other structures of this embodiment, reference may be made to the prior art and will not be described in detail here.

[0034] When installing the anchor cable meter in this embodiment, first insert the tail of a base 2 into a mounting hole 11 from one end of the main body 1, and ensure that the extrusion plate 22 at the tail is opposite to the threaded locking hole 13, then pass the steel string 3 through the through hole 23 of the head 21 of the base 2, and after passing through the notch 24 and the mounting hole 11, pass through the other side of the main body 1, tighten the locking screw 5 at this end, so that the two extrusion plates 22 clamp the ends of the steel string 3. Similarly, another base 2 is symmetrically installed at the other end of the main body 1; first stretch the steel string 3 to a predetermined initial tension, and then tighten the locking screw 5 corresponding to the other end. After installation, both ends of the steel string 3 are clamped; when the main body 1 is subjected to force, the stress will be transmitted to the steel string 3 to change the length of the steel string 3, and then the vibration frequency of the steel string 3 will be changed. The change in vibration frequency is obtained by measuring the induction coil 4, and the stress change of the main body 1, that is, the stress change of the measured structure, can be calculated.

[0035] When the length of the steel string needs to be changed, other types of bases can be selected to fix the steel string. Since the heads of different types of bases match the step surfaces at different positions in the step hole structure, the distance between the two bases at both ends of the same mounting hole can be adjusted, that is, the length of the steel string clamped between the two bases will change.

[0036] In some other embodiments, the head and tail of the base are detachably connected, such as by threaded connection, so that when the length of the steel string needs to be changed, different sizes of head and tail can be selected for assembly without replacing the entire base.

[0037] The above are only some embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have combinations and variations of the aforementioned technical features. Without departing from the spirit and scope of the present invention, those skilled in the art can improve, modify, or replace the present invention with equivalents, or apply the structure or method of the present invention to other fields to achieve the same effect, which all fall within the scope of protection included in the present invention.

Claims

1. An anchor cable meter, comprising a main body and a vibrating wire sensing assembly, characterized in that: A mounting hole arranged along the axial direction of the main body is provided on the main body, and a stepped hole structure is provided at both ends of the mounting hole, the stepped hole structure includes a plurality of stepped surfaces, the vibrating string induction component includes a base, a steel string and an induction coil; the base includes a head and a tail, the head is confined in the stepped hole structure; the head of the base is provided with a through hole, the tail of the base includes two extrusion plates, a notch is formed between the two extrusion plates, and the through hole is connected to the notch; a threaded locking hole connected to the mounting hole is provided on the side wall of the main body, the central axis of the threaded locking hole is perpendicularly intersected with the central axis of the corresponding mounting hole, and the locking screw is connected to the extrusion plate located in the mounting hole after passing through the threaded locking hole, the two ends of the steel string are fixed on the base, and the induction coil is fixed on the main body for detecting the vibration frequency of the steel string.

2. The anchor cable meter according to claim 1, characterized in that: The outer contour of the stepped hole structure is polygonal, circular or elliptical.

3. The anchor cable meter according to claim 2, characterized in that: The shape of the head portion is kept the same as the outline shape of the stepped hole structure.

4. The anchor cable meter according to claim 3, characterized in that: The lower surface of the head is used to cooperate with the step surface in the step hole structure.

5. The anchor cable meter according to claim 1, characterized in that: In each step hole structure located on the same side of the main body, the corresponding step surfaces are on the same plane.

6. The anchor cable meter according to claim 5, characterized in that: The base is designed in a variety of models, and the heads of the bases of different models are different in size. During installation, the heads of the bases of different models respectively cooperate with the step surfaces at different positions in the step hole structure to achieve positioning.

7. The anchor cable meter according to claim 1, characterized in that: There are multiple mounting holes, and the mounting holes are evenly distributed around the circumference of the main body.

8. The anchor cable meter according to claim 1, characterized in that: The stepped hole structures at both ends of the same mounting hole are symmetrical to each other.

9. The anchor cable meter according to claim 1, characterized in that: When the base is installed, the extrusion plate at the rear is kept perpendicular to the locking screw.

10. The anchor cable meter according to claim 1, characterized in that: The head and tail of the base are detachably connected.

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