Longitudinal wave type marsh detector
By introducing the design of moving sections and damping zones into the longitudinal wave swamp detector, the problem of difficult to maintain the perpendicular state of the detector movement with the ground under the influence of water surface corrugation is solved, and the detection accuracy and stability are improved.
Patent Information
- Application Number
- CN202421190122.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-29
AI Technical Summary
When used in swamps and shallows, existing longitudinal wave swamp detectors are susceptible to water surface ripples, which makes it difficult to maintain the perpendicular state of the detection movement with the ground, reducing the detection accuracy.
A longitudinal wave swamp detector including a protective case, a sealing cover, a detector movement and a movable section is designed to increase friction during the relative swing between the detector movement and the sealing cover through the damping area of the movable section, ensuring that The movement is always perpendicular to the ground, and the damping area provides damping when the swing angle exceeds the preset value, reducing the swing angle recovery time.
It effectively maintains the vertical state of the detector movement with the ground, improves the longitudinal wave energy reception accuracy and reduces distortion, and enhances the detection stability in swamps and shallows.
Smart Images
Figure CN222299803U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of geophysical geophones, in particular to a longitudinal wave type swamp geophone. Background Art
[0002] A detector is a device used to identify the presence or change of waves, oscillations or signals. It detects the detection object by identifying the presence or change of waves, oscillations or signals. It is widely used in geological surveys and explorations, such as goafs in low-lying geotechnical engineering, geological structure strata exploration, oil and gas exploration, site detection and evaluation, etc.
[0003] During field geophysical exploration, especially oil and gas exploration, swamps and shallow areas are common areas of use. The main equipment of existing swamp detectors includes detector movement, outer casing and lead-out cable. Since there is a large amount of liquid water on the surface and underground in swamps and shallow areas, the requirements for the air tightness and water tightness of the detector are relatively high. The outer casing of the existing detector is fully sealed and waterproof rubber ring to improve the sealing to prevent water from entering. Taking the longitudinal wave swamp detector as an example, during the operation, the longitudinal wave receiving direction of the detector is kept as vertical as possible with the earth, so that the detector can achieve the highest longitudinal wave energy reception and low distortion. After entering the water, the swamp detector will be affected by the ripples on the water surface and swing itself, making it difficult to maintain the vertical state of the detection movement and the ground, resulting in reduced detection accuracy. Summary of the invention
[0004] In view of the technical problems existing in the prior art, the first aspect of the utility model proposes a longitudinal wave type swamp geophone, comprising:
[0005] A protective shell, wherein the protective shell is configured as a cylindrical shell with an opening at the top;
[0006] A sealing cover, sealingly connected to the open end of the protective shell;
[0007] A detector core, sealed by the sealing cover in the cavity of the protective shell, for receiving mechanical longitudinal waves;
[0008] An active joint, through which the first end of the detector movement is movably connected to the sealing cover, so that the detector movement can swing in the protective shell;
[0009] The movable joint includes a base and a movable block, the base is configured as a hemispherical shell with a movable opening at the bottom, the outer side surface of the movable block is configured as an arc shape corresponding to the shape of the base, so that the movable block can move in the base, and a connecting rod connected to the detector movement is provided at the bottom of the movable block;
[0010] The inner wall of the base is provided with a smooth area and a damping area. When the movable block moves into the range of the damping area, the damping area can apply resistance to the movement of the movable block.
[0011] As an optional manner, the damping zone is composed of a plurality of damping strips arranged around the inner wall of the base.
[0012] As an option, the radial cross section of the damping strip is set to be semicircular.
[0013] As an optional manner, the damping strip is made of rubber.
[0014] As an optional manner, a top edge of the movable block is provided with a guiding slope.
[0015] As an optional manner, a bracket is provided at the bottom end of the sealing cover, and the base is connected to the bracket.
[0016] As an optional manner, a wire hole penetrating the movable block and the connecting rod is opened at the center of the movable block.
[0017] As an optional manner, a first connecting flange for connecting to the bracket is provided on the top of the base, and a second connecting flange for connecting to the detector movement is provided on the bottom of the connecting rod.
[0018] As an option, a cone head is detachably connected to the center of the bottom end of the protective shell.
[0019] As an optional manner, a screw is provided at the top end of the cone head, a threaded hole corresponding to the screw is provided at the bottom end of the protective shell, and the screw is threadedly connected to the threaded hole.
[0020] Compared with the prior art, the longitudinal wave type swamp geophone proposed by the utility model is provided with an active joint, and the first end of the geophone movement is movably connected to the sealing cover through the active joint. When used in swamps and shallow areas, when the water surface ripples make the geophone swing, the protective shell can swing relative to the geophone movement. Under the action of gravity, the geophone movement can always be in a vertical state with the ground, maintaining the state of maximum longitudinal wave energy reception and low distortion.
[0021] At the same time, through the damping zone designed in the movable joint, when the relative swing angle of the protective shell and the detector movement exceeds the preset angle, the damping zone can contact the movable block, thereby increasing the movable friction of the movable block in the base, so that the relative swing of the protective shell and the detector movement is affected by the gravity of the detector movement, offsetting the external force that causes the swing angle to continue to increase. At the same time, when the external force is removed, the relative swing angle is quickly restored to the preset range, reducing the time required for the central axis of the protective shell to restore its perpendicularity to the ground, thereby improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a structural schematic diagram of a longitudinal wave type swamp geophone shown in the utility model.
[0023] Figure 2 It is a structural schematic diagram of an active node in a longitudinal wave type swamp geophone shown in the utility model.
[0024] Figure 3 It is a cross-sectional view of an active joint in a longitudinal wave type swamp geophone shown in the utility model.
[0025] Figure 4 yes Figure 3 Enlarged schematic diagram at point A in the middle.
[0026] Figure 5 It is a schematic diagram of the structure of the movable block in the longitudinal wave type swamp geophone shown in the utility model.
[0027] The definitions of the reference numerals in the figures are as follows:
[0028] 1. Protective shell; 101. Threaded hole; 2. Sealing cover; 3. Detector movement; 4. Active joint; 41. Base; 411. First connecting flange; 42. Active block; 421. Guide slope; 43. Connecting rod; 431. Second connecting flange; 44. Smooth area; 45. Damping area; 451. Damping strip; 401. Active opening; 402. Wire hole; 5. Bracket; 6. Cone head; 61. Screw. DETAILED DESCRIPTION
[0029] In order to better understand the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.
[0030] Combination Figure 1-Figure 5 The longitudinal wave type swamp detector of the embodiment shown comprises a protective shell 1, a sealing cover 2, a detector movement 3 and an active joint 4. The protective shell 1 is a cylindrical shell with an opening at the top, the sealing cover 2 is sealed to the open end of the protective shell 1, and the detector movement 3 is sealed in the cavity of the protective shell 1 by the sealing cover 2 for receiving ground mechanical longitudinal waves.
[0031] Furthermore, a sealing ring is provided at the connection between the sealing cover 2 and the protective shell 1 to improve the sealing effect and prevent water vapor from entering the cavity and affecting the detector movement 3.
[0032] In a specific embodiment, a plurality of support plates with holes are provided around the edge of the sealing cover 2, and a plurality of connecting blocks with threaded holes are provided around the top of the protective shell 1. Bolts pass through the support plates and are threadedly connected to the connecting blocks on the protective shell 1, thereby pressing and fixing the sealing cover 2 on the protective shell 1.
[0033] In a specific embodiment, a hole for the signal line to pass through is opened in the center of the sealing cover 2. The signal line of the detector movement 3 passes through the hole opened on the sealing cover 2, and sealant is filled in the gap between the outside of the signal transmission line and the opening of the sealing cover 2 to seal the gap.
[0034] Combination Figure 1 As shown, the first end of the detector movement 3 is movably connected to the sealing cover 2 through the movable joint 4. Therefore, when the water surface ripples cause the detector to swing, the protective shell 1 can swing relative to the detector movement 3. Under the action of gravity, the detector movement 3 can always be in a vertical state with the ground, maintaining the state of maximum longitudinal wave energy reception and low distortion.
[0035] In a specific embodiment, the movable joint 4 includes a base 41 and a movable block 42. The base 41 is configured as a hemispherical shell with a movable opening 401 at the bottom. The outer side surface of the movable block 42 is configured as an arc shape corresponding to the shape of the base 41, so that the movable block 42 can move in the base 41. A connecting rod 43 connected to the detector movement 3 is provided at the bottom of the movable block 42. The connecting rod 43 extends downward from the movable opening 401. When the protective shell 1 and the detector movement 3 swing relative to each other, the movable block 42 moves in the base 41.
[0036] Furthermore, the inner wall of the base 41 is provided with a smooth area 44 and a damping area 45. When the movable block 42 moves in the smooth area 44, the relative swing angle of the protective shell 1 and the detector movement 3 is 0-9°. At this time, the relative swing angle of the protective shell 1 and the detector movement 3 is small. After the external force is removed, the central axis of the protective shell 1 can restore to perpendicularity with the ground (that is, parallel to the detection direction of the detector movement 3) in a short time.
[0037] When the movable block 42 moves to within the range of the damping zone 45, at this time, the relative swing angle of the protective shell 1 and the detector movement 3 exceeds 9°. If the angle continues to increase, the detector movement 3 will collide with the inner wall of the protective shell 1, and after the external force is removed, it will take a long time for the central axis of the protective shell 1 to recover its perpendicularity to the ground. At this time, the damping zone 45 can contact with the movable block 42, increasing the movable friction of the movable block 42 in the base 41, so that when the relative swing angle of the protective shell 1 and the detector movement 3 exceeds 9°, it will be affected by the gravity of the detector movement 3, offsetting the external force that causes the swing angle to continue to increase. At the same time, when the external force is removed, the relative swing angle is quickly restored to within 9°, reducing the time required for the central axis of the protective shell 1 to recover its perpendicularity to the ground.
[0038] In a specific embodiment, a counterweight is provided on the detector movement 3 so that the detector movement 3 has sufficient gravity to maintain the verticality of the detection surface of the detector movement 3 and the ground. The addition of the counterweight requires overcoming greater resistance when the relative swing angle between the protective shell 1 and the detector movement 3 exceeds 9°.
[0039] Combination Figure 4 As shown, the damping zone 45 is composed of a plurality of damping strips 451 arranged around the inner wall of the base 41, which can increase the friction of the movable block 42 in the base 41, so that the gravity of the detector movement 3 is transmitted to the protective shell 1, offsetting the external force that causes the swing angle to continue to increase.
[0040] In a specific embodiment, the radial cross-section of the damping strip 451 is set to be semicircular. When the movable block 42 moves to the damping area 45, the arc surface of the damping strip 451 can be more easily compressed, avoiding the damping strip 451 blocking the movable block 42 and making the movable block 42 unable to move.
[0041] In an optional embodiment, the damping strip 451 is made of rubber, which has good elasticity and can rebound quickly after being compressed.
[0042] Furthermore, a guide slope 421 is provided on the top edge of the movable block 42. The guide slope 421 can guide the movable block 42 to compress the damping strip 451, thereby preventing the damping strip 451 from blocking the movable block 42 and making the movable block 42 unable to move.
[0043] Combination Figure 1 As shown, a bracket 5 is provided at the bottom end of the sealing cover 2, and a base 41 is connected to the bracket 5, which can provide an introduction space for the signal line inserted through the sealing cover 2, so that the signal line can be inserted from the center of the sealing cover 2. When the detector is put into water and the signal line is subjected to tension, the center of gravity of the tension is placed on the center of gravity of the detector to avoid deflection of the detector.
[0044] In an optional embodiment, a wire hole 402 is opened at the center of the movable block 42 and passes through the movable block 42 and the connecting rod 43. The signal line of the detector movement 3 can directly pass through the wire hole 402. At this time, the bracket 5 is not required and the movable joint 4 can be directly fixed on the sealing cover 2.
[0045] Combination Figure 2 As shown, the top of the base 41 is provided with a first connecting flange 411 for connecting to the bracket 5, the first connecting flange 411 is provided with a hole for bolts to pass through, and the bracket 5 is provided with corresponding threaded holes. The base 41 is fixed to the bracket 5 by bolts passing through the holes on the first connecting flange 411 and connecting with the threaded holes on the bracket 5.
[0046] A second connecting flange 431 for connecting to the detector movement 3 is provided at the bottom of the connecting rod 43. A hole for bolts to pass through is opened on the second connecting flange 431. The detector movement 3 is provided with corresponding threaded holes. The detector movement 3 is fixed to the bottom of the connecting rod 43 by bolts passing through the holes on the second connecting flange 431 and connecting with the threaded holes on the detector movement 3.
[0047] Combination Figure 1 As shown, a cone head 6 is detachably connected to the center of the bottom end of the protective shell 1, which can guide the device to be inserted into the muddy ground.
[0048] In a specific embodiment, a screw 61 is provided at the top of the cone head 6, and a threaded hole 101 corresponding to the screw 61 is provided at the bottom end of the protective shell 1. The screw 61 is threadedly connected to the threaded hole 101 to facilitate the disassembly and assembly of the cone head 6. When not in use, the cone head 6 is removed to avoid the sharp head from causing stabbing injuries to personnel.
[0049] In combination with the above embodiments, by providing an active joint 4, the first end of the detector movement 3 is movably connected to the sealing cover 2 through the active joint 4. Therefore, when the water surface ripples cause the detector to swing, the protective shell 1 can swing relative to the detector movement 3. Under the action of gravity, the detector movement 3 can always be in a vertical state with the ground, maintaining the state of maximum longitudinal wave energy reception and low distortion.
[0050] Through the damping area 45 of the movable joint 4, when the relative swing angle between the protective shell 1 and the detector movement 3 exceeds 9°, the damping area 45 can contact with the movable block 42, thereby increasing the movable friction of the movable block 42 in the base 41, so that the relative swing of the protective shell 1 and the detector movement 3 is affected by the gravity of the detector movement 3, thereby offsetting the external force that causes the swing angle to continue to increase. At the same time, when the external force is removed, the relative swing angle is quickly restored to within 9°, thereby reducing the time required for the central axis of the protective shell 1 to restore its perpendicularity to the ground.
[0051] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.
Claims
1. A longitudinal wave swamp geophone, characterized in that: include: A protective shell (1), wherein the protective shell (1) is configured as a cylindrical shell having an opening at the top end; A sealing cover (2) sealingly connected to the open end of the protective shell (1); A detector core (3) is sealed by the sealing cover (2) in the cavity of the protective shell (1) and is used to receive mechanical longitudinal waves; An active joint (4), wherein the first end of the detector movement (3) is movably connected to the sealing cover (2) via the active joint (4), so that the detector movement (3) can swing within the protective shell (1); The movable joint (4) comprises a base (41) and a movable block (42); the base (41) is configured as a hemispherical shell with a movable opening (401) at the bottom; the outer side surface of the movable block (42) is configured as an arc shape corresponding to the shape of the base (41), so that the movable block (42) can move within the base (41); and a connecting rod (43) connected to the detector movement (3) is provided at the bottom of the movable block (42); The inner wall of the base (41) is provided with a smooth area (44) and a damping area (45); when the movable block (42) moves into the range of the damping area (45), the damping area (45) can exert resistance on the movement of the movable block (42).
2. The longitudinal wave type swamp detector according to claim 1, characterized in that: The damping area (45) is composed of a plurality of damping strips (451) arranged around the inner wall of the base (41).
3. The longitudinal wave type swamp detector according to claim 2, characterized in that: The radial cross section of the damping strip (451) is arranged to be semicircular.
4. The longitudinal wave type swamp detector according to claim 2, characterized in that: The material of the damping strip (451) is rubber.
5. The longitudinal wave type swamp detector according to claim 1, characterized in that: A guiding inclined surface (421) is provided on the top edge of the movable block (42).
6. The longitudinal wave type swamp detector according to claim 1, characterized in that: A bracket (5) is provided at the bottom end of the sealing cover (2), and the base (41) is connected to the bracket (5).
7. The longitudinal wave type swamp detector according to claim 1, characterized in that: A wire hole (402) penetrating the movable block (42) and the connecting rod (43) is provided at the center of the movable block (42).
8. The longitudinal wave type swamp detector according to claim 6, characterized in that: The top of the base (41) is provided with a first connection flange (411) for connecting to the bracket (5), and the bottom of the connecting rod (43) is provided with a second connection flange (431) for connecting to the detector movement (3).
9. The longitudinal wave type swamp detector according to claim 1, characterized in that: A cone head (6) is detachably connected to the center of the bottom end of the protective shell (1).
10. The longitudinal wave type swamp detector according to claim 9, characterized in that: A screw rod (61) is provided at the top end of the cone head (6), a threaded hole (101) corresponding to the screw rod (61) is provided at the bottom end of the protective shell (1), and the screw rod (61) is threadedly connected to the threaded hole (101).