A shock accelerometer for a borehole surveying instrument

Abstract

The utility model discloses an underground inclinometer anti -impact accelerometer, include: main part shell, the main part shell one end surface is provided with the shell apron, the shell apron one end is provided with the debugging apron, the debugging apron inside is provided with control circuit board, the main part shell inside both ends symmetry has the magnetic steel, both ends the magnetic steel one end outside sleeve setting has the compensation ring, both ends the magnetic steel other end is provided with the torque ware coil, the magnetic steel bottom is provided with the yoke, and the quartz swing piece is arranged between two torque ware coils. The utility model discloses further to the stability of quartz swing piece movement support through the annular setting of multiple elastic sheets, and the outside sleeve of quartz swing piece is provided with the bellyband, and the bellyband both sides are sleeved on both sides yoke, and the bellyband can avoid the displacement of accelerometer because of surface sliding, ensures that sensor and measurement part synchronous movement, guarantees the accuracy of measurement.

Description

Technical Field

[0001] This utility model relates to the field of accelerometer technology, and in particular to an impact-resistant accelerometer for downhole inclinometers. Background Technology

[0002] When using downhole inclinometers, accelerometers are typically used to improve logging accuracy. Quartz flexible accelerometers are key components in inertial systems, widely used in high-precision systems such as inertial navigation, attitude control, platform stabilization, missile servos, and drilling control due to their high accuracy, reliability, and low power consumption. In recent years, with the development of high-precision weaponry, many fields have placed higher demands on accelerometers, requiring not only high stability, repeatability, low power consumption, and fast start-up of quartz flexible accelerometers, but also strong resistance to vibration and shock and high reliability.

[0003] While existing quartz flexible accelerometers are highly accurate and start up quickly, the quartz pendulum accelerometers use very thin quartz pendulum plates that are easily broken and damaged, and have weak resistance to vibration and impact. Utility Model Content

[0004] The purpose of this invention is to provide an impact-resistant accelerometer for downhole inclinometers to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an impact-resistant accelerometer for a downhole inclinometer, comprising: a main body shell, a shell cover plate provided on one end surface of the main body shell, an adjustment cover plate provided on one end of the shell cover plate, and a control circuit board provided inside the adjustment cover plate;

[0006] Magnets are provided at both ends inside the main body shell. A compensation ring is sleeved on the outer side of one end of the magnets at both ends, and a torque coil is provided at the other end of the magnets at both ends. A yoke is provided at the bottom end of the magnets, and a quartz pendulum is provided between the two torque coils.

[0007] Preferably, spring plates are fixedly connected to the inner sides of the torque coils at both ends, and the other ends of the two sets of spring plates are fixedly connected to both sides of the quartz pendulum. The torque coils are movably connected to the quartz pendulum through the spring plates.

[0008] Preferably, each group of the spring pieces consists of four pieces, which are arranged in a circular array.

[0009] Preferably, isolation pads are provided at both ends of the control circuit board.

[0010] Preferably, the quartz pendulum is fitted with a belly band on its outer side, and the belly band is fitted onto the yokes on both sides.

[0011] Preferably, one end of the outer casing cover is provided with a connecting pin, the bottom end of the connecting pin is provided with a reinforcing part, and one end of the connecting pin is soldered to the control circuit board.

[0012] Preferably, the number of yokes is set in two groups, and the yokes are arranged symmetrically.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention features a quartz pendulum positioned between two torque coils. Springs are fixedly connected to the inner sides of the torque coils at both ends, and the other ends of the two sets of springs are fixedly connected to both sides of the quartz pendulum. The torque coils are movably connected to the quartz pendulum via the springs. The springs have extremely low stiffness in the axial sensitive axis direction and high radial stiffness, providing stable support for the movement of the quartz pendulum and improving its impact and vibration resistance. Each set of springs consists of four springs arranged in a ring array, further enhancing the stability of the quartz pendulum's movement. A belt is fitted around the outside of the quartz pendulum, with both sides of the belt fitted onto the yokes. The belt prevents the accelerometer from shifting due to surface slippage, ensuring synchronous movement between the sensor and the measurement part and guaranteeing measurement accuracy. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the top structure of the mounting panel of this utility model;

[0018] Figure 3 This is a schematic diagram of the overall exploded structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the bottom structure of the mounting panel of this utility model.

[0020] As indicated by the markings in the diagram: 1. Main body shell; 2. Shell cover plate; 201. Debugging cover plate; 202. Control circuit board; 203. Isolation pad; 3. Connecting pin; 301. Reinforcing part; 4. Magnet; 5. Compensation coil; 6. Torque coil; 601. Spring; 7. Yoke; 8. Quartz pendulum; 801. Abdomen band. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. The preferred embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. Although preferred embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this utility model more thorough and complete, and to fully convey the scope of this utility model to those skilled in the art.

[0022] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0024] In the description of this utility model, it should be understood that the terms "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] It should be understood that although the terms "first," "second," "third," etc., may be used to describe various components in this invention, this information should not be limited to these terms. These terms are only used to distinguish components of the same type from each other. For example, without departing from the scope of this invention, a first component may also be referred to as a second component, and similarly, a second component may also be referred to as a first component. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] The technical solutions of the embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0028] refer to Figures 1 to 4 An impact-resistant accelerometer for downhole inclinometers includes: a main body shell 1, a shell cover plate 2 provided on one end surface of the main body shell 1, an adjustment cover plate 201 provided on one end of the shell cover plate 2, and a control circuit board 202 provided inside the adjustment cover plate 201.

[0029] Magnets 4 are installed at both ends inside the main body shell 1. A compensation ring 5 is installed on the outer side of one end of the magnets 4. A torque coil 6 is installed at the other end of the magnets 4. A yoke 7 is installed at the bottom of the magnets 4. A quartz pendulum 8 is installed between the two torque coils 6.

[0030] Specifically, spring plates 601 are fixedly connected to the inner side of the torque coils 6 at both ends, and the other ends of the two sets of spring plates 601 are fixedly connected to both sides of the quartz pendulum 8. The torque coils 6 are movably connected to the quartz pendulum 8 through the spring plates 601.

[0031] Specifically, each group of shrapnel 601 consists of four shrapnels, which are arranged in a circular array.

[0032] Specifically, isolation pads 203 are provided at both ends of the control circuit board 202.

[0033] Specifically, a belly band 801 is fitted on the outer side of the quartz pendulum 8, and the belly band 801 is fitted on both sides of the yoke 7.

[0034] Specifically, a connecting pin 3 is provided at one end of the outer casing 2, and a reinforcing part 301 is provided at the bottom end of the connecting pin 3. One end of the connecting pin 3 is soldered to the control circuit board 202.

[0035] Specifically, the number of yokes 7 is set in two groups, and the yokes 7 are arranged symmetrically.

[0036] In this embodiment, a quartz pendulum 8 is arranged between two torque coils 6. Spring plates 601 are fixedly connected to the inner sides of the torque coils 6 at both ends. The other ends of the two sets of spring plates 601 are fixedly connected to both sides of the quartz pendulum 8. The torque coils 6 are movably connected to the quartz pendulum 8 through the spring plates 601. The spring plates 601 have extremely low stiffness in the axial sensitive axis direction and high radial stiffness, which can stably support the movement of the quartz pendulum 8, improving its impact and vibration resistance. Each set of spring plates 601 consists of four spring plates arranged in a ring array. The multiple ring-shaped spring plates 601 further enhance the stability of the movement support for the quartz pendulum 8. A belly band 801 is fitted onto the outer side of the quartz pendulum 8, with both sides of the belly band 801 fitted onto the two yokes 7. The belly band 801 prevents the accelerometer from shifting due to surface slippage, ensuring synchronous movement between the sensor and the measurement part, and guaranteeing measurement accuracy.

[0037] It should be noted that a connecting pin 3 is provided at one end of the outer cover plate 2, and a reinforcing part 301 is provided at the bottom of the connecting pin 3 to improve the strength of the connecting end of the connecting pin 3 and prevent the connecting pin 3 from being easily broken. One end of the connecting pin 3 is soldered to the control circuit board 202.

[0038] Based on the above embodiments, it can be concluded that during use, the device is subjected to external acceleration, and the resulting inertial force acts on the internal quartz pendulum 8, causing the quartz pendulum 8 to swing. The control circuit board 202 detects this and outputs the result. Subsequently, the control circuit board 202 provides current to the two sets of yokes 7, causing them to move in the magnets 4 and generate a balancing force. This balancing force interacts with the inertial force, allowing the quartz pendulum 8 to be in a balanced position. During the swinging process of the quartz pendulum 8, the spring piece 601 limits its movement. The spring piece 601 has extremely low stiffness in the axial sensitive axis direction and high radial stiffness, which can stably support the movement of the quartz pendulum 8, improving the impact resistance and vibration resistance of the quartz pendulum 8.

[0039] The present invention has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to the present invention. Furthermore, it is understood that the steps in the method of the present invention embodiments can be adjusted, combined, and deleted according to actual needs, and the structure in the device of the present invention embodiments can be combined, divided, and deleted according to actual needs.

[0040] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An impact-resistant accelerometer for downhole inclinometers, characterized in that, include: The main body shell (1) has a shell cover plate (2) on one end surface, and an adjustment cover plate (201) is provided on one end of the shell cover plate (2). A control circuit board (202) is provided inside the adjustment cover plate (201). The main body shell (1) has magnets (4) symmetrically arranged at both ends inside. A compensation ring (5) is sleeved on the outer side of one end of the magnets (4) at both ends. A torque coil (6) is arranged at the other end of the magnets (4). A yoke (7) is arranged at the bottom end of the magnets (4). A quartz pendulum (8) is arranged between the two torque coils (6). The inner sides of the torque coils (6) at both ends are fixedly connected with spring pieces (601), and the other ends of the two sets of spring pieces (601) are fixedly connected to both sides of the quartz pendulum (8). The torque coils (6) are movably connected to the quartz pendulum (8) through the spring pieces (601).

2. The shock-resistant accelerometer for downhole inclinometers according to claim 1, characterized in that, Each group of the spring pieces (601) consists of four pieces, which are arranged in a circular array.

3. The shock-resistant accelerometer for downhole inclinometers according to claim 1, characterized in that, Isolation pads (203) are provided at both ends of the control circuit board (202).

4. The shock-resistant accelerometer for downhole inclinometers according to claim 1, characterized in that, The quartz pendulum (8) is fitted with a belly band (801) on its outer side, and the belly band (801) is fitted on both sides of the yoke (7).

5. The shock-resistant accelerometer for a downhole inclinometer according to claim 4, characterized in that, The outer casing cover (2) is provided with a connecting pin (3) at one end, and a reinforcing part (301) is provided at the bottom end of the connecting pin (3). One end of the connecting pin (3) is welded to the control circuit board (202).

6. The shock-resistant accelerometer for a downhole inclinometer according to claim 5, characterized in that, The number of yokes (7) is set in two groups, and the yokes (7) are arranged symmetrically.

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