Salt cavern cavity shape detection device and detection method

Abstract

This invention relates to the field of detection instrument technology, and discloses a salt cavern shape detection device and method. The device includes a hollow central base with at least two sets of connecting components rotatably connected to it. All connecting components are evenly arranged circumferentially along the central axis of the central base. At least one set of connecting components is connected to a detection part for detection, and the remaining connecting components are connected to counterweights with a weight equal to that of the detection part. A drive mechanism for synchronously rotating all connecting components is also connected to the central base. This invention, by rotatably connecting multiple sets of evenly arranged connecting components circumferentially to the central base, ensures that the center of gravity of the entire detection device does not shift during angle adjustment of the detection part, thus solving the problem of accuracy issues caused by center of gravity shift in existing salt cavern shape detection devices.

Description

Technical Field

[0001] This invention relates to the field of detection instrument technology, specifically to a salt cavern shape detection device and detection method. Background Technology

[0002] Due to their excellent sealing and safety stability, underground salt caverns are considered ideal locations for oil and gas storage and waste treatment. The structural morphology, size, and orientation of these caverns are crucial parameters for evaluating their storage performance and safety. Currently, salt cavern detection is primarily performed using sonar equipment. To ensure more comprehensive and accurate detection, the detection equipment is typically designed as a three-section structure: an upper section, a middle section, and a lower section. The middle section rotates circumferentially relative to the central axis of the upper section, while the lower section oscillates relative to the central axis of the middle section. The sonar detection tool is mounted on the lower section, allowing it to not only rotate circumferentially but also oscillate, enabling effective detection of irregularly shaped underground salt caverns. For example, Chinese invention publication CN114035177A discloses a sonar tool for detecting the shape of salt caverns, using electromagnetic drive and bevel gears for propulsion. This allows the sonar detection tool on the lower section to rotate horizontally and oscillate vertically to complete the detection work.

[0003] Although the aforementioned detection tools enable them to rotate horizontally and swing vertically to complete the detection work, in actual operation, when the upper, middle, and lower supports are on the same vertical line, even if the lower support rotates horizontally, the center of gravity of the entire device will not change, allowing the detection tool to complete the detection work stably. However, when the lower support swings vertically, because the lower support rotates to form an angle with the middle and upper supports, the center of gravity of the entire detection tool will change, causing the middle and upper supports to tilt. For example, if the lower support is adjusted to rotate 45°, the actual angle of rotation of the lower support relative to the vertical line will be less than 45° due to the change in the center of gravity of the entire detection tool, resulting in measurement errors. Furthermore, since the entire detection tool is located at a considerable depth below the ground surface, it is not easy to make convenient adjustments, which affects the accuracy of the detection. Summary of the Invention

[0004] The present invention aims to provide a salt cavern shape detection device and detection method to solve the problem that the detection accuracy of salt cavern shape detection equipment is affected by the shift of the center of gravity during the detection process.

[0005] To solve the above problems, the present invention adopts the following technical solution: a salt cavern shape detection device, including a hollow central seat, at least two sets of connecting components are rotatably connected to the central seat, all connecting components are evenly arranged circumferentially along the central axis of the central seat, at least one set of connecting components is connected to a detection part for detection, the remaining connecting components are connected to a counterweight part with a weight equal to the weight of the detection part, and the central seat is also connected to a drive mechanism for driving all connecting components to rotate synchronously.

[0006] The principle of this solution is as follows: In this application, at least two connecting components are rotatably connected to the central base. All connecting components are evenly arranged circumferentially along the central axis of the central base. Therefore, when the drive mechanism drives all connecting components to rotate synchronously relative to the central base, after all connecting components rotate, since the connecting components are connected to the detection part or a counterweight part with the same weight as the detection part, the center of gravity of the central base and all connecting components will not change. At this time, the rotation of the connecting components will cause the detection part to swing relative to the central base and change its angle, so that the detection part can change its angle and complete the detection work more accurately.

[0007] The beneficial effects of this plan are: 1. Enhanced Precision in Detection: In existing technologies, the rotation of the lower base relative to the middle base causes a shift in the center of gravity of the entire detection device, preventing the detection tools connected to the lower base from accurately detecting the salt cavern cavity. This application addresses this by setting at least two connecting components and including a detection unit and a counterweight of equal weight. Each connecting component is connected to either the detection unit or the counterweight, ensuring that the center of gravity of the middle base and the remaining connecting components remains constant during synchronous rotation. This allows the detection unit to perform the detection work stably and accurately, effectively improving detection precision.

[0008] 2. Simpler Structure: Compared to the three-section detection devices in the prior art, the structure of the detection device is relatively complex. In this application, multiple connecting components are rotatably connected to the central base, and the detector can be directly connected to one or more of these connecting components. Therefore, compared to the detection devices in the prior art, fewer lower bases are required, simplifying the overall structure of the detection device, reducing manufacturing and assembly costs, and decreasing the risk of detection device failure.

[0009] 3. Achieves reduced detection costs: In this application, since there are at least two connecting components, at least two detection units can be connected to the central base simultaneously, provided that the center of gravity of the detection unit does not shift during the swinging process relative to the central base. Therefore, during the detection process, compared with the prior art which uses only one detector, if a 360° circumferential detection is required, a power component is needed to drive the detector to rotate 360° to complete the detection. However, with the technical solution of this application, there are multiple detection units, which can be evenly arranged along the circumference of the central base. Therefore, when there are two detection units, the central base only needs to rotate 180° to complete the circumferential detection, and when there are three detection units, the central base only needs to rotate 120° to complete the 360° circumferential detection. The more detection units there are, the less angle the central base needs to rotate to complete the circumferential detection, thereby reducing power loss. This has a positive effect on the detection process where the detection location is located at a deep depth below the surface.

[0010] Preferably, as an improvement, the connecting assembly includes a connecting portion, one end of which is rotatably connected to the central seat; the detection portion includes a plurality of detectors, the detectors being connected to the outside of the connecting portion and / or to the end of the connecting portion away from the rotatably connected to the central seat.

[0011] In this design, the connecting component is a connecting part rotatably connected to the central base at one end. The connecting part has a simple structure and is easy to install. The detector is connected to the outside of the connecting part and / or to the end of the connecting part away from the rotatably connected to the central base. When the detector is connected to the outside of the connecting part, the rotation of the connecting part relative to the central base can drive the detector to rotate, thereby adjusting the angle of the detector and enabling the detector to detect different locations within the salt cavern cavity. When the detector is located at the end of the connecting part away from the rotatably connected to the central base, it is easy to install since the detector is located at the end of the connecting part. At the same time, detectors can be connected to both the outside and the end of the connecting part, which can more conveniently and quickly complete the detection work comprehensively.

[0012] Preferably, as an improvement, the driving mechanism includes a driver, a slider, and a driving connector. The driver is connected inside the central seat, and the slider is connected to the driver. The slider is slidably connected to the central seat along the central axis of the central seat. The driving connector is connected between the connecting part and the slider and is used to drive the connecting part to rotate relative to the central seat.

[0013] In this scheme, the driver is used to drive the slider to slide along the central axis of the central seat. During the sliding process, the slider drives the connecting part to rotate relative to the central seat through the driving connector, thereby realizing the angle adjustment of the detector on the connecting part.

[0014] Preferably, as an improvement, the driver includes a stator, a rotor, a drive shaft, and a control system. The drive shaft is rotatably connected to a central base. The stator includes a stator lamination assembly connected to the central base and a coil winding connected to the stator lamination assembly. The rotor includes a magnet assembly fixedly connected to the drive shaft. The slider is threadedly engaged with the drive shaft.

[0015] In this scheme, the control system controls the energization of the coil windings on the stator lamination assembly, so that the magnet assembly is subjected to magnetic force and drives the rotor to rotate precisely. Under the force of the rotor rotation, the slider is subjected to force and slides relative to the central axis of the drive shaft, so that the slider drives the drive connector to rotate, thereby realizing the adjustment of the detector angle. By using the stator and rotor driving method, the rotation angle and number of rotations of the drive shaft can be precisely controlled, thereby achieving precise control of the detector rotation angle.

[0016] Preferably, as an improvement, the drive connector includes a connecting rod, one end of which is rotatably connected to the slider, and the other end of which is rotatably connected to the connecting part.

[0017] In this design, a connecting rod is used as the driving connector. The connecting rod has a simple structure, is easy to install, and can withstand a large load, thereby stably driving the connecting part and the detector to rotate relative to the central seat.

[0018] Preferably, as an improvement, the drive connector includes a push rod and a push block, the connecting part has a sliding groove, the push block is slidably connected in the sliding groove, one end of the push rod is fixedly connected to the slider, and the other end is rotatably connected to the push block.

[0019] In this design, the drive connector adopts the form of a push rod and a push block. The push block and the slider are in planar contact. When the slider slides relative to the central axis of the middle seat, it can smoothly push the push block to move, thereby pushing the connector and the detector to rotate, resulting in better stability during use.

[0020] Preferably, as an improvement, the outer wall of the middle seat has a mating groove that mates with the connecting part. When the connecting part is rotated to be parallel to the central axis of the middle seat, the outer side of the connecting part is flush with the outer wall of the middle seat. The side wall of the connecting part has a mounting groove, and the detection part is fixedly connected in the mounting groove. The depth of the mounting groove is greater than or equal to the thickness of the detection part.

[0021] In this design, by setting a mating groove, the detector and the connecting part can be rotated to be parallel to the central axis of the central base when not in use. At this time, the connecting part is completely located within the mating groove, which can effectively prevent the connecting part from being affected by the surrounding environment. For example, when the device is transported from the ground to the underground detection position, it can prevent the connecting part from protruding beyond the outer wall of the central base and being damaged by collision. At the same time, installing the detector in the mounting groove can also effectively protect the detector without affecting its use.

[0022] Preferably, as an improvement, the detection unit includes one or more combinations of acoustic detectors and photoelectric detectors.

[0023] In this scheme, the detector is one or a combination of acoustic and optical detectors. The type of detector is determined according to the actual detection environment, making it more applicable.

[0024] Preferably, as an improvement, it also includes an upper seat, wherein the middle seat is rotatably connected to the upper seat in the circumferential direction along its own central axis.

[0025] In this design, the middle seat is rotatably connected to the upper seat along its own central axis. By rotating the middle seat, the middle seat and the detector connected to the middle seat can rotate in the horizontal direction. The detector can rotate with the connecting part relative to the central axis of the middle seat, thereby rotating the detector in the vertical direction. Ultimately, the detector can be adjusted in both the horizontal and vertical directions so that the detector can perform 360° detection of the shape of the salt cavern cavity.

[0026] A method for detecting the shape of a salt cavern cavity, comprising using the aforementioned salt cavern cavity shape detection device to detect the shape of the salt cavern cavity, and the detection steps are as follows: Step 1: Lower the salt cavern shape detection device into the underground salt cavern; Step 2: Use the drive mechanism to drive all connecting components to rotate synchronously relative to the central base, so that the detection parts or counterweights connected to all connecting components rotate to a predetermined angle. During the rotation, the center of gravity of the entire detection device in the vertical direction will not shift. Then, use the detection parts to detect the shape of the salt cavern.

[0027] In this design, since the weights of the detection unit and the counterweight are equal, and all connecting components are evenly arranged circumferentially along the central axis of the central base, the center of gravity of the entire device will not shift in the vertical direction during the rotation of all connecting components, thus enabling the detection device to complete the detection process stably and accurately. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of Embodiment 1 of the present invention.

[0029] Figure 2 for Figure 1 A cross-sectional view along the central axis of the central seat.

[0030] Figure 3 This is a schematic diagram of the two connecting parts after they have been rotated open in Embodiment 1 of the present invention.

[0031] Figure 4 This is a schematic diagram of the stator lamination group and magnet group in Embodiment 1 of the present invention.

[0032] Figure 5 This is a schematic diagram of the connection between the connecting part and the middle part in Embodiment 2 of the present invention.

[0033] Figure 6 for Figure 5 A cross section.

[0034] Figure 7 for Figure 6 A magnified view of a portion of point A in the middle.

[0035] Figure 8 This is a cross-sectional view of the connection between the middle seat and the connecting part in Embodiment 3 of the present invention. Detailed Implementation

[0036] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: central seat 1, connecting part 2, boss 201, sliding groove 202, rotating shaft 3, slider 4, sliding groove 401, stator 5, rotor 6, magnet 601, drive shaft 7, spacer 701, control system 8, sheath 9, connecting rod 10, partition 11, clearance groove 1101, detector 12, upper seat 13, push rod 14, push block 15.

[0037] Example 1 This embodiment is as shown in the attached figure. Figure 1 and Figure 2 As shown: A salt cavern shape detection device includes a cylindrical, hollow central base 1. At least two sets of connecting components are rotatably connected to the bottom end of the central base 1. All connecting components are evenly arranged circumferentially along the central axis of the central base 1. In this embodiment, there are two sets of connecting components, symmetrically distributed on the left and right sides of the central base 1. At least one set of connecting components is connected to a detection part for detecting the shape parameters of the salt cavern, and the remaining connecting components are connected to counterweights with a weight equal to that of the detection part.

[0038] Combination Figure 1 and Figure 3In this embodiment, the connecting component includes a semi-cylindrical connecting part 2. The top of the connecting part 2 is integrally formed with a semi-circular boss 201. A rotating hole is opened on the boss 201. The bottom of the middle seat 1 is opened with a movable groove that mates with the boss 201. A rotating shaft 3 is rotatably connected to the movable groove through a bearing. The rotating hole on the boss 201 is rotatably connected to the rotating shaft 3. In order to ensure that the connecting parts 2 in the two sets of connecting components do not interfere with each other when rotating relative to the rotating shaft 3, the bosses 201 of the two connecting parts 2 are staggered along the length direction of the rotating shaft 3.

[0039] Combination Figure 2 and Figure 3 A drive mechanism for synchronously rotating all connecting components is connected to the central base 1. The drive mechanism includes a driver, a slider 4, and a drive connector. The driver is connected inside the central base 1, and the slider 4 is connected to the driver. Under the driving action of the driver, the slider 4 slides along the central axis of the central base 1. The drive connector is connected between the connecting part 2 and the slider 4, and is used to drive the connecting part 2 to rotate relative to the central base 1. Specifically, the driver in this embodiment includes a stator 5, a rotor 6, a drive shaft 7, and a control system 8. The stator 5 includes a stator 5 lamination group formed by stacking multiple stator 5 laminations and a coil winding wound on the stator 5 lamination group. Figure 2 (The coil winding is not shown in the image), combined with Figure 4 The stator 5 laminations adopt a fractional slot structure with 10 poles and 12 slots. The outer side of the stator 5 laminations is provided with positioning protrusions, and the middle seat 1 has a positioning groove that cooperates with the positioning protrusions, so that the stator 5 laminations can be fixed in the middle seat 1 by the positioning groove.

[0040] like Figure 4 As shown, the outer side of the drive shaft 7 is integrally formed with mounting grooves. These mounting grooves are arranged in 10 x 5 layers around the circumference of the drive shaft 7, with spacers 701 separating adjacent mounting grooves. The rotor 6 includes a set of magnets 601 composed of fifty magnets 601, which are installed within the mounting grooves. Simultaneously, combined with… Figure 2 To prevent the magnet 601 from dislodging from the mounting slot when the drive shaft 7 rotates, a sheath 9 is fixedly connected to the outside of the magnet 601 assembly by an interference fit. The control system 8 is used to control the energization of the coil windings on the stator 5 lamination assembly to generate a rotating magnetic field. Under the action of the rotating magnetic field, the magnet 601 and the drive shaft 7 connected to the magnet 601 can be driven to rotate. Since controlling the energization of the coil windings to generate a rotating magnetic field is a conventional technique in this field, the structure of the control system 8, the wiring sequence between the control system 8 and the coil windings, and the control process will not be described in detail here.

[0041] Combination Figure 2 and Figure 3The bottom of the central seat 1 has an integrally formed guide block. The slider 4 is generally disc-shaped, and the side wall of the slider 4 has a groove 401 that mates with the guide block. The bottom of the drive shaft 7 has an external thread, and the slider 4 has an internal thread that mates with the external thread of the drive shaft 7. When the drive shaft 7 rotates under the action of the rotor 6 and the stator 5, it can push the slider 4 to slide vertically along the central axis of the central seat 1. At the same time, the drive connection part 2 in this embodiment is a connecting rod 10. The top end of the connecting rod 10 is rotatably connected to the bottom surface of the slider 4 by a pin. The top end of the boss 201 has a connecting groove, and a pin is also fixedly connected in the connecting groove by a screw. The bottom end of the connecting rod 10 is rotatably connected to the pin, and the rotation connection points at both ends of the connecting rod 10 and the rotation connection points between the boss 201 and the central seat 1 are located at the three vertices of a triangle. When the top end of the connecting rod 10 slides vertically with the slider 4, the connecting rod 10 can be used to pull the connecting seat to rotate relative to the bottom end of the central seat 1.

[0042] Combination Figure 2 and Figure 3 A partition 11 is fixedly connected to the interior of the middle seat 1 near the bottom end by screws. The partition 11 is located between the drive shaft 7 and the boss 201. The partition 11 seals the opening at the bottom end of the middle seat 1, preventing external impurities from easily entering the space where the drive shaft 7 and the slider 4 meet, thus improving the stability of the slider 4's movement. At the same time, the partition 11 has a clearance groove 1101 that mates with the connecting rod 10, so that the connecting rod 10 is not obstructed or hindered during rotation by the partition 11.

[0043] Combination Figure 1 and Figure 2 In this embodiment, both connecting parts 2 are connected to detection units. In other embodiments besides this one, the detection unit may be connected to only one connecting part 2, while a counterweight of the same or equal shape and mass as the detection unit, such as a breeding block, may be connected to the other connecting part 2. This will not be elaborated further here. The detection unit includes multiple detectors 12 arranged along the length of the connecting part 2. In this embodiment, there are two detectors 12 on the same connecting part 2. An installation groove is formed on the outer wall of the connecting part 2. The detectors 12 are fixedly connected to the installation groove by screws. The depth of the installation groove is greater than the thickness of the detector 12, ensuring that the top surface of the detector 12 does not protrude beyond the outer wall of the connecting part 2 after installation, thus protecting the detector 12. Furthermore, the detectors 12 in this embodiment include one or more combinations of acoustic detectors 12 and photoelectric detectors 12. Preferably, the acoustic detector 12 uses an ultrasonic transducer and an electronic compass. Figure 2 (The electronic compass is not shown in the image). The ultrasonic transducer is used to achieve sound-to-electric conversion. The electronic compass is fixedly connected to the connecting part 2 by screws and is used to accurately detect the spatial position of the ultrasonic transducer.

[0044] like Figure 1 As shown, an upper seat 13 is connected above the middle seat 1. The upper seat 13 contains a structure similar to the driver inside the middle seat 1. The top of the middle seat 1 is fixedly connected to the drive shaft 7 inside the upper seat 13 by screws, allowing the drive shaft 7 inside the upper seat 13 to drive the middle seat 1 to rotate circumferentially in the horizontal direction. Of course, in other embodiments besides this one, an electric motor or other power structure from the prior art can also be used to directly drive the rotation of the middle seat 1; these will not be elaborated upon here.

[0045] The method for detecting the shape of a salt cavern involves using the aforementioned salt cavern shape detection device to detect the shape parameters of the salt cavern. The detection steps are as follows: Step 1: Drill a hole above the salt cavern cavity. Then, use the control system 8 to control the energization of the coil winding in the stator 5 lamination group to generate a magnetic field. Under the action of the magnetic force, the magnet 601 drives the drive shaft 7 to rotate. When the drive shaft 7 rotates, it pushes the slider 4 to slide down along the central axis of the middle seat 1 to the lower limit position. During the sliding process, the top of the connecting rod 10 moves down synchronously. Under the pushing and pulling action of the connecting rod 10, the free ends of the bottom of the two connecting parts 2 rotate to the vertical direction, and the two connecting parts 2 fit together to form a cylindrical structure. The diameter of the cylindrical structure is equal to that of the middle seat 1. At this time, the middle seat 1 and the two connecting parts 2 are cylindrical. The entire detection device is lowered into the predetermined detection position in the salt cavern cavity along the hole drilled on the ground. The electronic compass can accurately detect the spatial position of the ultrasonic transducer, thereby accurately controlling the dimensional parameters during the detection process.

[0046] Step Two: After the detector 12 is lowered to the predetermined position within the salt cavern, the control system 8 controls the rotation of the drive shaft 7. Under the power of the rotation of the drive shaft 7, the slider 4 slides upward relative to the drive shaft 7, pulling the connecting part 2 to swing vertically relative to the central seat 1 via the connecting rod 10. This causes the angle of the detector 12 to change in the vertical direction. Simultaneously, the driver on the upper seat 13 drives the central seat 1 to rotate horizontally, enabling the detector 12 to perform 360° detection of the surrounding environment. Because the two connecting parts 2 are symmetrically arranged relative to the central seat 1 during the process of pushing and pulling the connecting part 2 with the slider 4, even after the connecting parts 2 rotate at a certain angle, the horizontal forces exerted by the two connecting parts 2 on the central seat 1 cancel each other out, thus ensuring that the entire detection device will not tilt vertically during the detection process, ensuring stable and accurate detection.

[0047] Example 2 The difference between Embodiment 2 and Embodiment 1 is that the driving connector in Embodiment 1 is a connecting rod 10, combined with... Figure 5 , Figure 6 and Figure 7In this embodiment, a vertically oriented mating groove is formed on the side wall of the middle seat 1 near its bottom end, which mates with the connecting part 2. The bottom end of the connecting part 2 is rotatably connected to the bottom wall of the mating groove via two rotating shafts 3. Each of the two rotating shafts 3 corresponds to one of the two connecting parts 2. When the connecting part 2 rotates to be parallel to the central axis of the middle seat 1 (i.e., ...), ... Figure 6 In the vertical position, the outer side of the connecting part 2 is flush with the outer side of the middle seat 1. At the same time, in this embodiment, a detector 12 is also installed at the bottom of the middle seat 1 to detect the shape parameters of the salt cavern cavity below the middle seat 1. The driving connector includes a push rod 14 and a push block 15. The side plane of the connecting part 2 has a sliding groove 202. The sliding direction of the sliding groove 202 is at an angle to the length direction of the connecting part 2. The push block 15 is slidably connected in the sliding groove 202. One end of the push rod 14 is fixedly connected to the bottom of the slider 4 by a screw, and the other end is rotatably connected to the push block 15 by a pin.

[0048] In this embodiment, when the slider 4 slides vertically under the action of the drive shaft 7, it will drive the push rod 14 to move vertically. The push rod 14 will push the push block 15 to slide in the sliding groove 202. Since the sliding direction of the sliding groove 202 is at an angle to the length direction of the connecting part 2, and the bottom end of the connecting part 2 is rotatably connected to the middle seat 1, the push block 15 can push the connecting part 2 to rotate relative to the middle seat 1 when it slides in the sliding groove 202, thereby adjusting the angle of the detector 12 on the connecting part 2. Since the contact area between the push block 15 and the connecting part 2 is large, the push block 15 can push the connecting part 2 to rotate more smoothly and accurately, so that the detector 12 can accurately complete the detection of the shape parameters of the salt cavern cavity; moreover, in this solution, the push block 15 is used to push the connecting part 2 to rotate, such as Figure 7 As shown by the dashed line, the position of the dashed line indicates the state when the connecting part 2 is rotated to a horizontal position. Figure 6 It is known that when the slider 4 pushes the connecting part 2 from a vertical state to a horizontal state, the distance the slider 4 moves in the vertical direction is very small. Therefore, by using the technical solution of this embodiment, the length of the connecting part 2 in the vertical direction can be effectively reduced, thus reducing the overall length of the detection device and making the structure of the detection device more compact, which is convenient for underground detection. Furthermore, the slider 4 can adjust the detector 12 at a large angle with a small movement distance, effectively reducing the energy consumption during the rotation of the detector 12 and increasing the duration of underground operation of the detection device. It is worth noting that, as... Figure 6 As shown, the bottom end of the connecting part 2 is rotatably connected to the middle base 1. Therefore, during the rotation of the connecting part 2, the detector 12 located on the side wall of the connecting part 2 cannot detect the space above its horizontal plane. This is due to the structural limitation caused by the bottom end of the connecting part 2 being rotatably connected to the middle base 1. If it is necessary to detect the space above the detector 12, that is, to achieve the effect described in Embodiment 1... Figure 3The effect can be achieved simply by rotating the top of the connecting part 2 to the middle seat 1; further details will not be provided here.

[0049] Example 3 The difference between Embodiment 3 and Embodiment 1 is that in Embodiment 1, the top end of the connecting rod 10 is rotatably connected to the bottom end of the middle seat 1; in this embodiment, as shown... Figure 8 As shown, in this embodiment, a vertically arranged mating groove that cooperates with the connecting part 2 is also opened on the side wall of the middle seat 1 near the bottom. The bottom end of the connecting rod 10 is rotatably connected to the bottom wall of the mating groove through the rotating shaft 3. When the connecting part 2 is rotated to be parallel to the central axis of the middle seat 1, the outer side of the connecting part 2 is flush with the outer side of the middle seat 1.

[0050] In this embodiment, the bottom end of the connecting part 2 is rotatably connected to the middle seat 1, and a mating groove is provided on the side wall of the middle seat 1. By utilizing the mating groove side wall and the side wall of the connecting part 2 for support, the connecting part 2 can be made more stable during the angle adjustment process, which can effectively improve the stability of the entire detection device.

[0051] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A salt cavern shape detection device, comprising a hollow central seat, characterized in that: At least two sets of connecting components are rotatably connected to the central base. All connecting components are evenly arranged around the central axis of the central base. At least one set of connecting components is connected to a detection part for detection. The remaining connecting components are connected to a counterweight part with a weight equal to that of the detection part. The central base is also connected to a drive mechanism for driving all connecting components to rotate synchronously. The connecting assembly includes a connecting part, one end of which is rotatably connected to the central base; the detection part includes a plurality of detectors, which are connected to the outside of the connecting part and / or to the end of the connecting part away from the rotatably connected to the central base. The driving mechanism includes a driver, a slider, and a driving connector. The driver is connected inside the central seat, and the slider is connected to the driver. The slider is slidably connected to the central seat along the central axis of the central seat. The driving connector is connected between the connecting part and the slider and is used to drive the connecting part to rotate relative to the central seat. The driver includes a stator, a rotor, a drive shaft, and a control system. The drive shaft is rotatably connected to the central base. The stator includes a stator lamination assembly connected to the central base and a coil winding connected to the stator lamination assembly. The rotor includes a magnet assembly fixedly connected to the drive shaft. The slider is threadedly engaged with the drive shaft. The drive connector includes a push rod and a push block. A sliding groove is provided on the connecting part. The push block is slidably connected in the sliding groove. One end of the push rod is fixedly connected to the slider and the other end is rotatably connected to the push block. The outer wall of the central base has a mating groove that mates with the connecting part. When the connecting part is rotated to be parallel to the central axis of the central base, the outer side of the connecting part is flush with the outer wall of the central base. The side wall of the connecting part has a mounting groove, and the detection part is fixedly connected in the mounting groove. The depth of the mounting groove is greater than or equal to the thickness of the detection part.

2. The salt cavern shape detection device according to claim 1, characterized in that: The detector includes one or more combinations of acoustic detectors and photoelectric detectors.

3. The salt cavern shape detection device according to claim 1, characterized in that: It also includes an upper seat, and the middle seat is rotatably connected to the upper seat along its own central axis in the circumferential direction.

4. A method for detecting the shape of a salt cavern, characterized in that: The shape of the salt cavern cavity is detected using the salt cavern shape detection device as described in any one of claims 1-3. The detection steps are as follows: Step 1: Lower the salt cavern shape detection device into the underground salt cavern; Step 2: Use the drive mechanism to drive all connecting components to rotate synchronously relative to the central base, so that the detection parts or counterweights connected to all connecting components rotate to a predetermined angle. During the rotation, the center of gravity of the entire detection device in the vertical direction will not shift. Then, use the detection parts to detect the shape of the salt cavern.

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