Vibrating wire type earth pressure cell

Abstract

The utility model belongs to the technical field of engineering monitoring equipment, and particularly relates to a vibrating wire type earth pressure box, which comprises a shell and a mounting column, the shell is circular, an accommodating cavity is arranged on the shell, the mounting column is arranged in the accommodating cavity, a coil mounting seat is further arranged in the center of the bottom surface of the accommodating cavity, and the coil mounting seat is used for fixing an electromagnetic coil; the mounting column comprises a main rod and a supporting rod; vibrating wire fixing mechanisms are arranged on the main rod and the supporting rod; the vibrating wire fixing mechanism is used for fixing the steel wire on the mounting column; the number of the installation columns is multiple, and the multiple installation columns are arranged around the coil installation base. According to the vibrating wire type earth pressure box, a mounting column comprises a main rod and a supporting rod; vibrating wire fixing mechanisms are arranged on the main rod and the supporting rod; in this way, when the steel string is installed, the two ends of the steel string can be selectively fixed to the corresponding positions on the supporting columns or the main rod according to actual needs, and therefore different initial installation lengths of the steel string correspond to.

Description

Technical Field

[0001] This utility model relates to the field of engineering monitoring equipment technology, specifically to a vibrating wire earth pressure box. Background Technology

[0002] An earth pressure cell is a high-precision measuring instrument specifically used in geotechnical engineering to measure the contact pressure within soil or soil-rock masses. Earth pressure cells are mainly classified into three categories: resistance strain gauge type, vibrating wire type, and fiber optic grating type. Each type of earth pressure cell has a different working principle and is best suited for different scenarios. The vibrating wire type earth pressure cell reflects changes in earth pressure by measuring the change in the vibration frequency of a vibrating metal wire; its working principle is based on the relationship between the natural frequency of the vibrating wire and the applied tension. Vibrating wire earth pressure cells have strong anti-interference capabilities and good stability, making them particularly suitable for measuring underground structures such as foundation pits, tunnels, and dams.

[0003] In existing technologies, vibrating wire earth pressure cells generally include a metal shell, with the vibrating wire sensing mechanism located inside the shell. The vibrating wire sensing mechanism typically includes mounting posts, an electromagnetic coil, and a vibrating wire. The mounting posts are fixedly connected to the shell, and both ends of the vibrating wire are fixed to the mounting posts. The electromagnetic coil and the vibrating wire can induce each other. In this structure, the initial length of the vibrating wire is determined by the distance between the mounting posts, and the initial length of the vibrating wire directly affects the vibration frequency, sensitivity, and measurement range of the vibrating wire earth pressure cell. For example, according to the principles of physics, the vibration frequency of a vibrating wire is inversely proportional to its length; that is, the longer the vibrating wire, the lower its natural vibration frequency; the shorter the vibrating wire, the higher its natural vibration frequency. However, the mounting post structure of existing ordinary vibrating wire earth pressure cells is simple, and after the mounting post is fixed, it can usually only install a vibrating wire of a fixed length, resulting in poor adaptability. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a vibrating wire earth pressure box that can accommodate vibrating wires of various initial lengths, thereby improving adaptability.

[0005] The technical solution of this utility model is: a vibrating wire earth pressure box, including a shell and a mounting column. The shell is circular and has a receiving cavity. The mounting column is disposed in the receiving cavity, and a coil mounting seat is disposed at the center of the bottom surface of the receiving cavity. The coil mounting seat is used to fix the electromagnetic coil. The mounting column includes a main rod and a support rod. A vibrating wire fixing mechanism is disposed on both the main rod and the support rod. The vibrating wire fixing mechanism is used to fix the steel wire to the mounting column. There are multiple mounting columns, and the multiple mounting columns are arranged around the coil mounting seat.

[0006] Furthermore, the number of mounting posts is even, and every two mounting posts form a group, with a coil mounting base separating each pair of mounting posts in the same group. Preferably, there are two mounting posts, and the two mounting posts are arranged symmetrically about the coil mounting base.

[0007] Furthermore, the main rod is vertically welded to the bottom surface of the receiving cavity; the support rod is vertically connected to the main rod. A vibrating string fixing mechanism is provided at the end of the support rod.

[0008] Furthermore, the support rod and the main rod can be integrally formed; the support rod and the main rod can also be detachably connected, and different support rods have different lengths, so that when support rods of different lengths are installed on the main rod, they can correspond to the initial installation length of different steel strings.

[0009] Furthermore, the vibrating string fixing mechanism includes locking screws and clamps.

[0010] Furthermore, both the main rod and the support rod are provided with vibrating wire holes and locking holes for installing the vibrating wire fixing mechanism; and the locking holes are connected to the vibrating wire holes; wherein the vibrating wire holes are used to cooperate with the clamping blocks, and the locking holes are used to cooperate with the locking screws.

[0011] Furthermore, the extension line of the central axis of the vibrating wire hole intersects with the coil mounting base.

[0012] Furthermore, the vibrating wire holes on the two mounting posts in the same group are set one-to-one; so that after the steel wire is installed on the two mounting posts, the middle part of the steel wire is located above the coil mounting base, so as to induce the electromagnetic coil.

[0013] Furthermore, the clamping block includes a base plate and two clamping plates disposed on the base plate. A mounting hole is provided in the middle of the base plate, and the mounting hole communicates with the gap between the two clamping plates.

[0014] Furthermore, a cover plate is provided on the housing at the opening of the receiving cavity, and the cover plate is used to seal the receiving cavity.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: The vibrating wire earth pressure box of this utility model has a mounting column including a main rod and a support rod; and a vibrating wire fixing mechanism is provided on both the main rod and the support rod; thus, when installing the steel wire, the two ends of the steel wire can be fixed to the corresponding positions on the support or the main rod according to actual needs, thereby corresponding to different initial lengths of steel wire; in addition, the support rod and the main rod can also be detachably connected, and support rods of different lengths can be installed, and steel wires of different initial lengths can also be installed accordingly, which further enhances the adaptability of the vibrating wire earth pressure box of this application. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of Embodiment 1 of this utility model;

[0017] Figure 2 This is an exploded view of Embodiment 1 of the present invention;

[0018] Figure 3This is a three-dimensional schematic diagram of Embodiment 1 of this utility model with the cover plate omitted;

[0019] Figure 4 This is a top view of Embodiment 1 of the present invention, omitting the cover plate;

[0020] Figure 5 This is a schematic diagram of the mounting column in Embodiment 1 of this utility model;

[0021] Figure 6 This is a schematic diagram of the clamping block in Embodiment 1 of this utility model;

[0022] In the diagram: 1. Housing; 11. Coil mounting base; 12. Cover plate; 2. Mounting post; 21. Main rod; 22. Support rod; 23. Vibrating string hole; 24. Locking hole; 3. Electromagnetic coil; 4. Steel string; 5. Clamping block; 6. Locking screw. Detailed Implementation

[0023] 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 meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0024] Example 1

[0025] like Figure 1-6 As shown, this embodiment is a vibrating wire earth pressure box, including a shell 1 and a mounting column 2. The shell 1 is circular and has a receiving cavity. The mounting column 2 is disposed in the receiving cavity, and a coil mounting seat 11 is also disposed at the center of the bottom surface of the receiving cavity. The coil mounting seat 11 is used to fix the electromagnetic coil 3. The mounting column 2 includes a main rod 21 and a support rod 22. A vibrating wire fixing mechanism is disposed on both the main rod 21 and the support rod 22. The vibrating wire fixing mechanism is used to fix the steel wire 4 to the mounting column 2. There are multiple mounting columns 2, and the multiple mounting columns 2 are arranged around the coil mounting seat 11.

[0026] In this embodiment, there are two mounting posts 2, and the two mounting posts 2 are arranged symmetrically about the coil mounting base 11. The main rod 21 is vertically welded to the bottom surface of the receiving cavity; the support rod 22 is perpendicular to the main rod 21, and the support rod 22 and the main rod 21 are integrally formed.

[0027] In this embodiment, the vibrating string fixing mechanism includes a locking screw 6 and a clamping block 5. Both the main rod 21 and the support rod 22 are provided with vibrating string holes 23 and locking holes 24 for mounting the vibrating string fixing mechanism; the locking holes 24 communicate with the vibrating string holes 23; the vibrating string holes 23 are used to cooperate with the clamping block 5, and the locking holes 24 are used to cooperate with the locking screw 6. The extension line of the central axis of the vibrating string hole 23 is ensured to intersect with the coil mounting base 11; and the vibrating string holes 23 on the two mounting posts 2 are correspondingly arranged; so that when the steel string 4 is installed in the corresponding vibrating string holes 23 on the two mounting posts 2, the middle part of the steel string 4 can be located above the coil mounting base 11, so as to induce a connection with the electromagnetic coil 3 in the coil mounting base 11.

[0028] In this embodiment, the clamping block 5 includes a base plate and two clamping plates disposed on the base plate. A mounting hole is provided in the middle of the base plate, and the mounting hole communicates with the gap between the two clamping plates. A cover plate 12 is provided on the housing 1 at the opening of the receiving cavity, and the cover plate 12 is used to seal the receiving cavity. In this embodiment, other functional structures not specifically described can adopt relevant structures in the prior art, and will not be elaborated here.

[0029] The method of using the vibrating wire earth pressure box in this embodiment is the same as that of the existing vibrating wire earth pressure box. The advantage of this application is that the end of the steel wire 4 can be fixed in the corresponding vibrating wire hole 23 on the mounting column 2 according to actual needs, so that the initial length of the steel wire 4 can be actively selected and controlled, which improves the adaptability of the entire pressure box.

[0030] Example 2

[0031] The difference between this embodiment and Embodiment 1 is that in this embodiment, the support rod 22 and the main rod 21 are detachably connected, and the lengths of different support rods 22 are different. A vibrating string hole 23 and a locking hole 24 are provided at the end of the support rod 22. Thus, when support rods 22 of different lengths are installed on the main rod 21, steel strings 4 of different lengths can be installed accordingly.

[0032] In some embodiments, the height of the support rod 22 and the vibrating string hole 23 on the main column can be different, so that multiple steel strings 4 of different lengths can be installed simultaneously, such as... Figure 3 Or as shown in Figure 4.

[0033] The above are only some embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various combinations and modifications of the aforementioned technical features. Any improvements, modifications, equivalent substitutions, or applications of the structure or method of the present utility model to other fields to achieve the same effect without departing from the spirit and scope of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A vibrating wire earth pressure cell, comprising a shell and a mounting column, characterized in that: The housing is circular and has a receiving cavity. The mounting column is disposed in the receiving cavity, and a coil mounting seat is disposed at the center of the bottom surface of the receiving cavity. The coil mounting seat is used to fix the electromagnetic coil. The mounting column includes a main rod and a support rod. A vibrating string fixing mechanism is disposed on both the main rod and the support rod. The vibrating string fixing mechanism is used to fix the steel string to the mounting column. There are multiple mounting columns, and the multiple mounting columns are arranged around the coil mounting seat.

2. The vibrating wire earth pressure cell according to claim 1, characterized in that: The number of mounting posts is even, and every two mounting posts form a group, with a coil mounting seat separating each pair of mounting posts in the same group.

3. The vibrating wire earth pressure cell according to claim 1, characterized in that: There are two mounting posts, and the two mounting posts are arranged symmetrically about the coil mounting base.

4. The vibrating wire earth pressure cell according to claim 1, characterized in that: The main rod is vertically welded to the bottom surface of the receiving cavity; the support rod is vertically connected to the main rod.

5. The vibrating wire earth pressure cell according to claim 3, characterized in that: The vibrating string fixing mechanism includes a locking screw and a clamping block.

6. The vibrating wire earth pressure cell according to claim 5, characterized in that: Both the main rod and the support rod are provided with vibrating wire holes and locking holes for installing the vibrating wire fixing mechanism; and the locking holes are connected to the vibrating wire holes; wherein the vibrating wire holes are used to cooperate with the clamping blocks, and the locking holes are used to cooperate with the locking screws.

7. The vibrating wire earth pressure cell according to claim 6, characterized in that: The extension line of the central axis of the vibrating wire hole intersects with the coil mounting base.

8. The vibrating wire earth pressure cell according to claim 7, characterized in that: The vibrating wire holes on the two mounting posts in the same group are set one-to-one; so that after the steel wire is installed on the two mounting posts, the middle part of the steel wire is located above the coil mounting base, so as to induce the electromagnetic coil.

9. The vibrating wire earth pressure cell according to claim 5, characterized in that: The clamping block includes a base plate and two clamping plates disposed on the base plate. A mounting hole is provided in the middle of the base plate, and the mounting hole communicates with the gap between the two clamping plates.

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