Surface wave interference resistant sliding bearing detector

Abstract

The utility model discloses a sliding bearing geophone capable of resisting surface wave interference, which belongs to the field of geophones and comprises a shell, a tail nail arranged at the lower part of the shell, an upper cover arranged at the upper part of the shell, a threading cap arranged at the top of the upper cover and a mounting cavity arranged in the shell, a lower glass plate, a lower movable part and a magnetic isolation lower frame are sequentially arranged at the bottom of the mounting cavity from bottom to top, a geophone is arranged above the magnetic isolation lower frame, and a magnetic isolation upper frame, an upper movable part, an upper glass plate and a bearing pressing cap are sequentially arranged above the geophone. According to the utility model, the upper and lower ends of the geophone are provided with the lower moving member and the upper moving member, so that the geophone can smoothly perform planar motion on the surface of the tempered glass plate; when the surface wave interference is received, the deep groove ball bearing can provide an opposite force along the interference direction to offset the interference without influencing the geophone to receive effective underground refracted waves in the vertical direction, so that the geological data is cleaner and clearer, and the analysis and the interpretation of the geological data in the later period are facilitated.

Description

Technical Field

[0001] The utility model relates to the field of geophones, in particular to a sliding bearing geophone for resisting surface wave interference. Background Art

[0002] In the process of petroleum seismic exploration, geophones are key devices for receiving seismic waves. However, when receiving seismic waves, geophones are often affected by surface wave interference, resulting in inaccurate and unclear geological data. To solve this problem, some solutions have been proposed in the industry, but they are often complex in structure and have poor use effects. Therefore, a geophone housing that can eliminate surface wave interference is needed, which has better practicability and effects. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a sliding bearing geophone for resisting surface wave interference, and solve the problem that when a geophone receives seismic waves, it is affected by surface wave interference, resulting in inaccurate and unclear geological data.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A sliding bearing geophone for resisting surface wave interference of the utility model includes a housing. A tail nail is arranged at the lower part of the housing, an upper cover is arranged at the upper part of the housing, a wire threading cap is arranged at the top of the upper cover, an installation cavity is arranged inside the housing, a lower glass plate, a lower movable part and a magnetic isolation lower bracket are sequentially arranged at the bottom of the installation cavity from bottom to top, a geophone is arranged above the magnetic isolation lower bracket, a magnetic isolation upper bracket, an upper movable part and an upper glass plate are sequentially arranged above the geophone, and a bearing pressing cap is arranged on the top surface of the upper glass plate.

[0006] Further, the housing is injection molded with nylon material.

[0007] Still further, the lower movable part and the upper movable part have the same structure.

[0008] Still further, the lower movable part includes a fixed seat. The top surface of the fixed seat is connected to the bottom surface of the magnetic isolation lower bracket, a cage is arranged at the bottom surface of the fixed seat, and a plurality of balls are arranged on the cage.

[0009] Still further, both the magnetic isolation lower bracket and the magnetic isolation upper bracket are made of LY alloy hard aluminum material.

[0010] Still further, both the lower glass plate and the upper glass plate are made of tempered glass plates.

[0011] Compared with the prior art, the beneficial technical effects of the utility model:

[0012] In the present utility model, a lower movable part and an upper movable part are arranged at the upper and lower ends of the geophone. Both the lower movable part and the upper movable part adopt deep groove ball bearings, enabling them to smoothly perform planar movement on the surface of the tempered glass plate. When receiving surface wave interference, the deep groove ball bearings will give an opposite force along the interference direction to cancel the interference without affecting the geophone's reception of effective underground refracted waves in the vertical direction. This design makes the geological data cleaner and clearer, facilitating the subsequent analysis and interpretation of the geological data. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present utility model will be further described below in conjunction with the drawings.

[0014] Figure 1 It is a cross-sectional view of the sliding bearing geophone for anti-surface wave interference of the present utility model;

[0015] Figure 2 It is a cross-sectional view of the lower movable part of the present utility model.

[0016] Description of reference numerals: 1, housing; 2, upper cover; 3, lower glass plate; 4, lower movable part; 4-1, fixed seat; 4-2, cage; 4-3, ball; 5, magnetic isolation lower bracket; 6, geophone; 7, magnetic isolation upper bracket; 8, upper movable part; 9, upper glass plate; 10, bearing cap; 11, cable passing cap; 12, tail nail. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] As Figure 1-2 shown, a sliding bearing geophone for anti-surface wave interference includes a housing 1. A tail nail 12 is threadedly connected to the lower part of the housing 1, and an upper cover 2 is threadedly connected to the upper part of the housing 1. A cable passing cap 11 passes through the top of the upper cover 2 and extends out from the inside of the upper cover 2. The cable passing cap 11 leads out a connecting cable, facilitating connection and operation. An installation cavity is arranged inside the housing 1. A lower glass plate 3, a lower movable part 4, and a magnetic isolation lower bracket 5 are sequentially installed at the bottom of the installation cavity from bottom to top. A geophone 6 is installed above the magnetic isolation lower bracket 5. A magnetic isolation upper bracket 7, an upper movable part 8, and an upper glass plate 9 are sequentially installed above the geophone 6. A bearing cap 10 is installed on the top surface of the upper glass plate 9. The geophone 6 is placed in the installation grooves of the magnetic isolation lower bracket 5 and the magnetic isolation upper bracket 7 and is tightly positioned by the bearing cap 10 and the upper cover 2. One tempered glass plate is provided at the bottom of the installation cavity, and deep groove ball bearings are installed on the surface of the tempered glass plate. The good surface finish of the tempered glass enables the deep groove ball bearings to move more smoothly on the surface.

[0018] The housing 1 is injection-molded from nylon material, having excellent wear resistance and impact resistance.

[0019] The lower movable part 4 and the upper movable part 8 have the same structure. AsFigure 2 As shown in the figure, taking the following movable part 4 as an example to introduce its specific structure. The lower movable part 4 includes a fixed seat 4-1. The top surface of the fixed seat 4-1 is welded to the bottom surface of the magnetic isolation lower frame 5. The bottom surface of the fixed seat 4-1 is connected with a cage 4-2. A number of balls 4-3 are installed on the cage 4-2, and the balls 4-3 slide on the surface of the lower glass plate 3. The installation method of the cage 4-2 and the balls 4-3 is similar to the structure of a deep groove ball bearing.

[0020] Both the magnetic isolation lower frame 5 and the magnetic isolation upper frame 7 are made of LY12 alloy hard aluminum material, and the main purpose is to isolate the influence of the magnetism of the seismic detector itself on the deep groove ball bearing.

[0021] Both the lower glass plate 3 and the upper glass plate 9 are made of tempered glass plates.

[0022] The installation process of the present utility model is as follows:

[0023] First, place the lower glass plate 3, the lower movable part 4, and the magnetic isolation lower frame 5 in the installation cavity of the housing 1 in sequence. Then, install the seismic detector 6 on the magnetic isolation lower frame 5. After that, install the magnetic isolation upper frame 7, the upper movable part 8, and the upper glass plate 9 above the seismic detector 6 in sequence, and install the bearing cap 10 on the top surface of the upper glass plate 9. Finally, thread the upper cover 2 with a wire passing cap 11 connected thereto onto the housing 1.

[0024] In the present utility model, deep groove ball bearings are provided at both the upper and lower ends of the seismic detector, which can ensure that the seismic detector can smoothly perform planar movement on the surface of the tempered glass plate. During field exploration, the seismic detector receives seismic waves excited by the seismic source. The seismic waves include effective underground refracted waves and also include useless surface wave interferences. When the seismic detector receives surface wave interferences, the deep groove ball bearings will give a counter force along the direction of the incoming surface waves to cancel the surface wave interferences, without affecting the seismic detector's reception of the effective underground refracted waves in the vertical direction. In this way, the geological data will be very clean and clear, which is more conducive to the later analysis and interpretation of the geological data.

[0025] The embodiments described above are only descriptions of the preferred modes of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall all fall within the protection scope determined by the claims of the present utility model.

Claims

1. A sliding bearing geophone for anti-surface wave interference, characterized in that: It includes a housing (1), a tail nail (12) is provided at the lower part of the housing (1), an upper cover (2) is provided at the upper part of the housing (1), a wire threading cap (11) is provided at the top of the upper cover (2), an installation cavity is arranged inside the housing (1), a lower glass plate (3), a lower movable part (4), and a magnetic isolation lower bracket (5) are successively arranged at the bottom of the installation cavity from bottom to top, a geophone (6) is arranged above the magnetic isolation lower bracket (5), a magnetic isolation upper bracket (7), an upper movable part (8), and an upper glass plate (9) are successively arranged above the geophone (6), and a bearing cap (10) is arranged on the top surface of the upper glass plate (9).

2. The sliding bearing geophone for anti-surface wave interference according to claim 1, characterized in that: The housing (1) is injection molded with nylon material.

3. The sliding bearing geophone for resisting surface wave interference according to claim 1, characterized in that: The structures of the lower movable part (4) and the upper movable part (8) are the same.

4. The sliding bearing geophone for resisting surface wave interference according to claim 3, characterized in that: The lower movable part (4) includes a fixed seat (4-1), the top surface of the fixed seat (4-1) is connected to the bottom surface of the magnetic isolation lower bracket (5), a cage (4-2) is arranged at the bottom surface of the fixed seat (4-1), and a number of balls (4-3) are arranged on the cage (4-2).

5. The sliding bearing geophone for resisting surface wave interference according to claim 1, characterized in that: Both the magnetic isolation lower bracket (5) and the magnetic isolation upper bracket (7) are made of LY12 alloy hard aluminum material.

6. The sliding bearing geophone for anti-surface wave interference according to claim 1, characterized in that: Both the lower glass plate (3) and the upper glass plate (9) are made of tempered glass plates.

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