In-hole detector and movement base

Abstract

The utility model provides an in-hole detector and a movement base, and the movement base comprises a chassis which is rotatably connected with a housing of the in-hole detector; the rotating part is arranged between the chassis and the shell of the detector, so that the in-hole detector rotates relative to the chassis; the balancing weight is installed on the chassis so that the weight of the lower portion of the machine core base can be larger than that of the upper portion of the machine core base. The structure optimization of the movement base can be utilized to realize the adjustment of the placement position of the detector, so that the detector can reach a balance state of three components, and the data acquisition accuracy is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of mine auxiliary equipment, in particular to a borehole geophone and a core base. Background Technique

[0002] During the coal mining process, due to various geological factors, geological disasters such as coal seam damage may be caused, seriously affecting the normal safe production of coal mines. Therefore, it is particularly important to use geophysical methods to detect geological structures in the coal mining face in advance. The trough wave seismic exploration has good detection effects in the detection of geological structures in the mine working face. During the working process, seismic geophones and explosives are arranged in the coal seam. After the explosives explode, the generated seismic waves are received by the geophones. Through a series of complex data processing and analysis, the location and extension of the geological structures in the detection area can be inferred.

[0003] To ensure the richness of seismic data, a three-component borehole geophone as shown in Figure 1 is mostly used. The geophone is divided into a front section 51 and a rear section 52 of the geophone. The geophone can be used in conjunction with an intrinsically safe seismograph and can simultaneously detect the seismic wave amplitudes in three directions (the x component is the propagation direction of the wave along the coal seam, the y component is the horizontal shear wave direction perpendicular to the propagation direction, and the z component is the vertical shear wave direction perpendicular to the propagation direction) in the deep space of the coal wall. In order to accurately collect data of the three components, when the three-component borehole geophone collects data, the placement position of the geophone needs to satisfy the balance state of the x, y, and z directions. In the existing technology, as shown in Figure 2 , the positions of the first nut 61 and the second nut 62 at the end of the geophone are mostly used to judge whether the borehole geophone is placed correctly, and a certain auxiliary lever needs to be used to rotate the geophone in the coal hole so that it is placed in the specified position in the coal hole, so that technicians can collect accurate seismic data. Content of the Utility Model

[0004] The utility model provides a borehole geophone and a core base, so as to realize the adjustment of the placement position of the geophone by optimizing the structure of the core base, so that the geophone can reach the balance state of the three components and ensure the accuracy of data collection.

[0005] In order to solve the above technical problems existing in the prior art, the solution of the utility model is:[[]]

[0006] The utility model provides a core base for a borehole geophone, and the core base includes:

[0007] A chassis, which is rotatably connected to the outer shell of the borehole geophone;

[0008] A rotating member is disposed between the chassis and the housing of the geophone to enable the downhole geophone to rotate relative to the chassis.

[0009] A counterweight is mounted on the chassis to make the lower part of the movement base heavier than its upper part.

[0010] In some embodiments, the rotating member is a bearing, the inner ring of the bearing is connected to the chassis, and the outer ring of the bearing is connected to the housing of the geophone.

[0011] In some embodiments, the bearing is a ball bearing.

[0012] In some embodiments, the counterweight is detachably mounted on the chassis.

[0013] The present utility model also provides a downhole geophone, which includes a housing and a movement base rotatably connected to the housing.

[0014] For the movement base provided by the present utility model, by arranging a counterweight on the movement base inside the downhole geophone, the whole movement part has a heavier base and a lighter upper part. It is connected by a bearing between the solid load-bearing part of the movement and the housing of the geophone. Under the self-gravity of the solid load-bearing movement base, the bearing is driven to rotate. When the bearing reaches the static equilibrium position, the whole geophone movement can just be in a balanced state in the x, y, and z directions. The purpose of enabling the movement inside the geophone housing to accurately receive seismic wave data without rotating the external housing is achieved. The adjustment of the placement position of the geophone can be realized by optimizing the structure of the movement base, so that the geophone can reach a balanced state in three components and ensure the accuracy of data acquisition. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 One of the structural schematic diagrams of the geophone in the prior art;

[0017] Figure 2 Another structural schematic diagram of the geophone in the prior art;

[0018] Figure 3 One of the structural schematic diagrams of the movement base provided by the present utility model when in use;

[0019] Figure 4 This is the second schematic diagram showing the movement base of the present utility model in its working state. Detailed implementation manners

[0020] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0021] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0022] It should be understood that the specific implementation manners described herein are only used to explain the present utility model and do not limit the protection scope of the present utility model.

[0023] As Figure 3 and Figure 4 shown, the movement base 1 provided by the present utility model is for downhole geophones. The movement base 1 is a key component for downhole geophones, and its main function is to ensure the stability of the geophone during operation and to achieve a balanced state in three components. These three components generally refer to the measurement components of the geophone in three different directions, namely the vertical component, the horizontal component, and the radial component.

[0024] The movement base 1 includes a chassis 11, a rotating member 2, and a counterweight 4. Among them, the chassis 11 is the basic part of the movement base 1, and it is rotatably connected to the outer shell 31 of the downhole geophone 3. Structures such as the connection 32 between the outer shell of the geophone and the outer wall of the bearing, the geophone outer shell screw 33, the stainless steel layer 34 of the geophone outer shell, and the connection 35 between the outer shell of the geophone and the three-component movement are provided on the geophone outer shell 31. This design allows the geophone to rotate relative to the chassis under the action of external forces, so as to adapt to uneven settlement of the ground or other external influences. The chassis is rotatably connected to the outer shell of the downhole geophone. Specifically, structures such as the connection 12 between the three-component movement chassis and the bearing, the connection 13 between the three-component movement and the base load-bearing part, the connection 14 between the solid base load-bearing part and the outer shell, the connection 15 of the outer shell, and the solid base load-bearing nut 16 are provided on the chassis 11.

[0025] The rotating member 2 is disposed between the chassis 11 and the housing 31 of the geophone, so that the borehole geophone rotates relative to the chassis 11; the rotating member 2 is arranged between the chassis and the geophone housing, and it acts as a medium for connection and rotation. The design of the rotating member needs to ensure that the geophone can rotate smoothly while maintaining an accurate measurement state.

[0026] The counterweight 4 is mounted on the chassis 11 so that the lower part of the movement base is heavier than its upper part; the counterweight 4 is installed on the chassis, and its purpose is to adjust the weight distribution of the movement base so that the lower part of the base is heavier than the upper part. This design helps the geophone to maintain a vertical state in the borehole and can quickly restore balance even under the influence of external forces.

[0027] Specifically, the rotating member 2 is a bearing. The inner ring 23 of the bearing is connected to the chassis 11, and the outer ring 22 of the bearing is connected to the housing 31 of the geophone. There are balls 21 provided between the inner ring and the outer ring. As a rotating member, the bearing can provide high-precision rotational flexibility. This enables the geophone to make fine adjustments relative to the chassis when affected by external forces such as ground settlement or uneven loads, maintaining its stability; at the same time, the design of the bearing aims to reduce friction, ensuring smooth and stable rotation of the geophone during rotation. Low friction also helps to reduce energy loss, improve the response speed and overall efficiency of the geophone; and bearings generally have good load-bearing capacity and can withstand various forces that the geophone may encounter during operation, including static loads and dynamic loads, ensuring the reliability and durability of the geophone in a complex environment; in addition, the use of bearings helps to maintain precise alignment between the geophone housing and the chassis, which is crucial for the measurement accuracy of the geophone. Precise alignment can reduce measurement errors and improve the reliability of data.

[0028] Among them, the bearing can be a ball bearing. As a rotating member in the movement base, the ball bearing not only provides the necessary rotational flexibility but also ensures the stability and reliability of the geophone in a complex environment. Through precise alignment, low friction and good load-bearing capacity, the ball bearing helps to improve the measurement accuracy and overall performance of the geophone.

[0029] In addition to ball bearings, there are several other types of bearings or rotating members that can be used in the design of the movement base to achieve stable and precise rotation of the geophone. The following are some common options:

[0030] Cylindrical Bearings: Cylindrical bearings use cylindrical rolling elements and are suitable for applications with large radial loads and medium speeds. They provide line contact, so they have a higher load-bearing capacity, but the rotational accuracy may not be as good as that of ball bearings.

[0031] Tapered Roller Bearings: Tapered roller bearings are designed to withstand radial and axial loads. They can self-align and adapt to misalignment between the shaft and housing bore, which makes them very useful in the design of the movement base, especially in cases where different angles or misalignments need to be accommodated.

[0032] Spherical Bearings: Spherical bearings allow a certain degree of angular displacement and axial displacement and are suitable for applications that require a large adjustment range. They can withstand radial and axial loads and still maintain good performance under misaligned conditions.

[0033] Thrust Bearings: If the movement base needs to withstand large axial loads, thrust bearings are a suitable choice. They are specifically designed to withstand one-way or two-way axial forces.

[0034] Composite Bearings: Composite bearings are made by combining non-metallic materials such as plastics or ceramics with metals. They are commonly used in light-load, low-friction, or corrosive environments.

[0035] Self-Lubricating Bearings: Self-lubricating bearings are usually made of special self-lubricating materials such as polytetrafluoroethylene (PTFE) and perform well in lubrication-free or difficult-to-maintain environments.

[0036] In actual usage scenarios, the choice of which type of bearing or rotating part depends on various factors, including the expected load, rotational speed, environmental conditions, maintenance requirements, and the required rotational accuracy. In practical applications, designers need to select the most suitable rotating part according to specific working conditions and performance requirements.

[0037] In some embodiments, the counterweight 4 is detachably mounted on the chassis. The design of the detachable counterweight increases the flexibility and adaptability of the movement base, enabling it to better meet the needs of different applications and environments. Through simple adjustment, the movement base can ensure that the geophone remains stable and balanced under various conditions, thereby improving the measurement accuracy and reliability.

[0038] In addition to the above movement base, the present utility model also provides a borehole geophone including the movement base. For the structures of other parts of the borehole geophone, reference can be made to the prior art and will not be elaborated herein.

[0039] In the above specific embodiments, for the movement base provided by the present utility model, by arranging a counterweight in the movement base inside the geophone in the hole, the whole movement part has a heavy base and a light upper part. The movement base is connected to the geophone housing through a bearing. Under the self-gravity of the solid load-bearing part of the movement base, the bearing is driven to rotate. When the bearing reaches the static equilibrium position, the whole movement of the geophone can just be in a balanced state in the x, y, and z directions. The movement inside the geophone housing can accurately receive seismic wave data in three directions without rotating the external housing. By optimizing the structure of the movement base, the placement position of the geophone can be adjusted, enabling the geophone to reach a balanced state in three components and ensuring the accuracy of data acquisition.

[0040] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative efforts.

[0041] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, also by hardware. Based on this understanding, the above technical solutions, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disc, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A movement base for a borehole detector, characterized in that: The movement base comprises: A chassis, the chassis being rotatably connected to a housing of the borehole geophone; A rotating member, the rotating member is arranged between the chassis and the housing of the geophone, so as to enable the geophone in the hole to rotate relative to the chassis; A counterweight block is installed on the chassis so that the weight of the lower part of the movement base is greater than the weight of the upper part.

2. The movement base according to claim 1, characterized in that: The rotating part is a bearing, the inner ring of the bearing is connected to the chassis, and the outer ring of the bearing is connected to the housing of the detector.

3. The movement base according to claim 2, characterized in that: The bearing is a ball bearing.

4. The movement base according to claim 1, characterized in that: The counterweight block is detachably mounted on the chassis.

5. A borehole detector, characterized in that: The invention comprises a shell and a movement base rotatably connected to the shell.

Images