Flow type relative gravimeter

Abstract

The invention discloses a flowing type relative gravimeter, and relates to the technical field of oil-gas exploration equipment. The relative gravimeter comprises a relative gravimeter main body, the front side of the relative gravimeter main body is fixedly provided with a display screen, the top circumference of the relative gravimeter main body is uniformly and fixedly provided with three gradienters, the bottom of the relative gravimeter main body is provided with a supporting device, and the supporting device comprises three side frames. And the three side frames are circumferentially and uniformly fixed on the outer wall of the lower part relative to the gravimeter main body. Through the arrangement of the supporting device, the relative gravimeter main body, the bottom plate, the screw and the screw block are matched to drive the insertion plate to be inserted into the ground, so that the stability of the relative gravimeter main body on the ground can be effectively improved, and the relative gravimeter main body is prevented from being interfered by external vibration or movement; the friction force of contact between the inserting plate and the land can be increased, and therefore higher road holding force is provided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil and gas exploration equipment, in particular to a flow type relative gravimeter. BACKGROUND

[0002] A relative gravimeter is a precision instrument used to measure the difference in gravity between different locations on the Earth's surface. It determines the variation in gravity by measuring the difference between the local gravitational acceleration and that of a known standard location. This instrument is widely used in regional gravity research and gravity mapping, oil, gas and mineral exploration, and other fields to detect underground structures, anomalies and crustal movements.

[0003] The Chinese patent with patent publication number CN218332003U discloses a flow type relative gravimeter, which includes a shell, a leveling unit, a temperature control unit, a capacitive sensor, an elastic unit, a power supply unit and a display screen. The capacitive sensor includes an upper fixed plate, a moving plate and a lower fixed plate. The elastic unit is a quartz spring. The top of the temperature control unit is connected with a fixed rod. The bottom of the quartz spring is connected with the moving plate. The top of the quartz spring passes through the upper fixed plate and is connected to the bottom of the fixed rod, so that the moving plate is located at the middle position of the upper fixed plate and the lower fixed plate. A data acquisition module is connected to the capacitive sensor. The data acquisition module is connected with a remote controller. The remote controller and the display screen are connected with the control circuit module of the leveling unit. A temperature sensor is installed in the temperature control unit. The remote controller is connected with the temperature sensor. The gravimeter can measure work through remote control, reduce human factors interference on the instrument, and has high data security.

[0004] However, the current gravimeter has the following problems: when the gravimeter is used in the field exploration of soft soil, the originally adjusted horizontal plane is easily affected by external factors and sinks into the soil, so that the supporting surface is not horizontal, affecting the final data collection. Therefore, we propose a flow type relative gravimeter. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a flow type relative gravimeter, which solves the problems raised in the background art.

[0006] To achieve the above object, the present application is realized by the following technical scheme: a flow type relative gravimeter, comprising a relative gravimeter main body, the front side of the relative gravimeter main body is fixed with a display screen, the top circumference of the relative gravimeter main body is uniformly fixed with three levels, the bottom of the relative gravimeter main body is provided with a supporting device, the supporting device comprises three side frames, the three side frames are uniformly fixed at the lower outer wall of the relative gravimeter main body, the bottom of the three side frames is fixed with a bottom plate, the outer wall circumference of the bottom plate is uniformly fixed with three screw blocks, the top of the three screw blocks is penetrated and threadedly connected with a screw, the outer part of the three side frames is slidingly installed with a sliding plate, the sliding plate and the bottom plate are provided with springs, the bottom of the side of the sliding plate close to the center of the bottom plate is fixed with a plug-in plate, the plug-in plate penetrates the top of the bottom plate, the top of the side of the sliding plate away from the center of the bottom plate is provided with a round hole, the round hole of the sliding plate is sleeved on the outside of the screw, and the side of the plug-in plate away from the center of the bottom plate is provided with a wave-shaped surface, the relative gravimeter main body is placed on the ground, the bottom plate will first contact the ground, the screw is rotated, the screw is subjected to the thread action between the screw block, the screw moves downward and is nailed into the land, the screw moves downward and pushes the sliding plate to move downward, the sliding plate pushes the plug-in plate to move downward, and the plug-in plate is inserted into the land.

[0007] According to the above technical scheme, the supporting device further comprises a motor, a plurality of swing plates, the motor is fixed at the bottom of the relative gravimeter main body, the output end bottom of the motor is fixed with a threaded rod, the outside of the threaded rod is threadedly connected with a threaded ring, the outside circumference of the threaded ring is uniformly fixed with three T-shaped connecting rods, the two sides of the side of the T-shaped connecting rod away from the threaded ring are fixed with L-shaped push rods, a plurality of notches are formed in the outside of the bottom plate, two notches in the plurality of notches are a group, and the two notches are located on the two sides of the sliding plate respectively, a plurality of swing plates are hingedly connected in the plurality of notches of the bottom plate respectively, the top of the swing plate is fixed with a U-shaped rod, the end of the L-shaped push rod away from the T-shaped connecting rod is slidingly installed in the inside of the U-shaped rod, the bottom of the swing plate is provided with an inclined surface, and the inclined surface of the swing plate decreases in the direction of the sliding plate, after the screw is inserted into the land, the motor is started, the motor drives the threaded rod to rotate, the threaded rod drives the threaded ring to push the T-shaped connecting rod and the L-shaped push rod to move downward, the L-shaped push rod slides along the inside of the U-shaped rod, and the L-shaped push rod pushes the swing plate to swing downward, and the inclined surface of the swing plate presses the soil to extrude in the direction of the plug-in plate.

[0008] According to the technical scheme, the compacting device is arranged at the bottom plate, the compacting device comprises three T-shaped columns, the three T-shaped columns are fixed at the top of the bottom plate in a circumferential and uniform manner, L-shaped slide rods are slidably arranged at the top of the three T-shaped columns, springs are arranged between the L-shaped slide rods and the T-shaped columns, a collar is fixed between the bottoms of the three L-shaped slide rods, limit assemblies are arranged at the edges of the collar for limiting the position of the collar, when the bottom plate contacts the ground, the bottom plate contacts the ground with the collar, and the collar increases the contact area between the bottom plate and the ground.

[0009] According to the technical scheme, the compacting device further comprises a fixing ring, three L-shaped ball block rods and three semicircular plates, the three L-shaped ball block rods are fixed at one side of the three L-shaped slide rods close to the center of the bottom plate, the fixing ring is fixed at the lower outer wall of the threaded rod, the three semicircular plates are fixed at the outer wall of the fixing ring in a circumferential and uniform manner, the L-shaped ball block rods are fixed with ball blocks at the bottoms of the ends thereof away from the L-shaped slide rods, the ball blocks of the L-shaped ball block rods are located on the movement track of the semicircular plates, the fixing ring is driven to rotate when the threaded rod rotates, the fixing ring drives the semicircular plates to rotate, when the semicircular plates move to the positions of the ball blocks of the L-shaped ball block rods, the semicircular plates push the ball blocks of the L-shaped ball block rods to drive the L-shaped ball block rods to move upward, the L-shaped ball block rods drive the collar to move upward through the L-shaped slide rods, when the semicircular plates no longer push the ball blocks of the L-shaped ball block rods, the L-shaped slide rods drive the collar to reset and move downward under the elastic force of the corresponding springs of the L-shaped slide rods, and the collar moves up and down in this way.

[0010] According to the above technical scheme, the limiting component comprises a trapezoidal block, a fixed plate, an elastic expansion plate and an L-shaped resisting plate, the trapezoidal block is fixed at the bottom of the side of the sliding plate away from the center of the bottom plate, a sliding cavity is formed in the top of the side of the screw block away from the center of the bottom plate, the L-shaped resisting plate is slidingly installed in the sliding cavity of the screw block, and a spring is arranged between the L-shaped resisting plate and the inner wall of the sliding cavity of the screw block, the fixed plate is fixed at the top of the sleeve ring, the fixed end of the elastic expansion plate is arranged on the side of the fixed plate close to the screw block, the expansion end of the elastic expansion plate penetrates through the outer wall of the screw block and extends into the sliding cavity of the screw block, the top of the L-shaped resisting plate away from the elastic expansion plate is arc-shaped, and the bottom of the trapezoidal block is inclined, the arc-shaped portion of the L-shaped resisting plate is located on the movement track of the inclined surface of the trapezoidal block, when the screw does not push the sliding plate to move downward, the expansion end of the elastic expansion plate is inserted into the sliding cavity of the screw block at this time, the expansion end of the elastic expansion plate and the sliding cavity of the screw block limit the position of the sleeve ring through the fixed plate, when the screw pushes the sliding plate to move downward, the sliding plate moves downward with the trapezoidal block, when the inclined surface of the trapezoidal block moves to the arc-shaped position of the L-shaped resisting plate, the inclined surface of the trapezoidal block pushes the arc-shaped portion of the L-shaped resisting plate to drive the L-shaped resisting plate to move away from the screw block, the expansion end of the elastic expansion plate is extruded by the L-shaped resisting plate, and the expansion end of the elastic expansion plate is pushed out of the sliding cavity of the screw block, at this time, the expansion end of the elastic expansion plate no longer limits the position of the sleeve ring through the fixed plate.

[0011] The application provides a flow type relative gravity instrument. (1) The support device is arranged, so that the relative gravity instrument body, the bottom plate, the screw, the screw block cooperate to drive the plug-in plate to be inserted into the land, thereby effectively increasing the stability of the relative gravity instrument body on the ground, preventing the relative gravity instrument body from being disturbed by external vibration or movement, and the wave-shaped surface of the plug-in plate can increase the friction between the plug-in plate and the land, thereby providing stronger grip, thereby ensuring that the relative gravity instrument body is stable and does not move during use.

[0012] (2) The screw, the motor, the threaded rod, the threaded ring, the T-shaped connecting rod, the L-shaped push rod and the U-shaped rod cooperate to drive the inclined surface of the lower swing plate to press the soil to be extruded in the direction of the plug-in plate, so that the soil is more closely contacted with the plug-in plate, thereby enhancing the fixing effect of the plug-in plate and preventing the relative gravity instrument body from being affected by external vibration or movement during use.

[0013] (3) The present application is provided with a compaction device, so that when the bottom plate contacts the ground, the bottom plate contacts the ground with the sleeve ring, which increases the contact area of the bottom plate and the ground, thereby effectively increasing the friction between the bottom plate and the ground, preventing the bottom plate from slipping or shifting during use, especially on soft ground; meanwhile, the threaded rod, fixed ring, semicircular plate, L-shaped ball block rod cooperate to drive the sleeve ring to move up and down reciprocally, so that the sleeve ring compacts the soil around the bottom plate during the process of pressing the soil towards the direction of the insertion plate on the inclined surface of the swing plate, thereby avoiding the problem of the soil being compressed to a certain extent when the swing plate exerts pressure, resulting in the insertion plate being not firmly fixed, thereby causing the insertion plate to loosen or shift, the sleeve ring compacts the soil to make the soil more compact and firm, thereby enhancing the friction and fixing force between the insertion plate and the soil, which can effectively reduce the risk of the insertion plate loosening or shifting due to external interference (such as vibration, wind, soil change, etc.). BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 schematic diagram of the whole application Figure 1 ; Figure 2 schematic diagram of the whole application Figure 2 ; Figure 3 schematic diagram of the whole application Figure 4 schematic diagram of the whole application Figure 5 schematic diagram of the whole application Figure 6 schematic diagram of the whole application Figure 5 schematic diagram of the whole application Figure 7 schematic diagram of the whole application Figure 5 schematic diagram of the whole application Figure 8 schematic diagram of the whole application

[0015] In the figure: 1, relative gravimeter main body; 2, display screen; 3, level; 4, support device; 41, side frame; 42, bottom plate; 43, screw; 44, screw block; 45, sliding plate; 46, insertion plate; 47, motor; 48, threaded rod; 49, threaded ring; 410, T-shaped connecting rod; 411, L-shaped push rod; 412, U-shaped rod; 413, swing plate; 5, compaction device; 51, T-shaped column; 52, L-shaped sliding rod; 53, sleeve ring; 54, L-shaped ball block rod; 55, semicircular plate; 56, fixed ring; 57, trapezoidal block; 58, fixed plate; 59, elastic expansion plate; 510, L-shaped abutment plate. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application.

[0017] Please refer to Figure 1 Figure 8 An embodiment of the present application is: a flow type relative gravimeter, comprising a relative gravimeter body 1, a display screen 2 is fixed on the front side of the relative gravimeter body 1, three levels 3 are uniformly fixed on the top circumference of the relative gravimeter body 1, a supporting device 4 is arranged at the bottom of the relative gravimeter body 1, the supporting device 4 comprises three side frames 41, the three side frames 41 are uniformly fixed at the lower outer wall of the relative gravimeter body 1, a bottom plate 42 is fixed between the bottoms of the three side frames 41, three screw blocks 44 are uniformly fixed on the outer wall of the bottom plate 42, screws 43 are screwed through and connected to the tops of the three screw blocks 44, sliding plates 45 are slidingly installed on the outer sides of the three side frames 41, springs are arranged between the sliding plates 45 and the bottom plate 42, an insertion plate 46 is fixed at the bottom of one side of the sliding plate 45 close to the center of the bottom plate 42, the insertion plate 46 penetrates through the top of the bottom plate 42, a circular hole is formed at the top of the other side of the sliding plate 45 away from the center of the bottom plate 42, the circular hole of the sliding plate 45 is sleeved on the outside of the screw 43, and the other side of the insertion plate 46 away from the center of the bottom plate 42 is provided with a wavy surface. Through the arrangement of the above structure, the insertion plate 46 is inserted into the land, so that the stability of the relative gravimeter body 1 on the ground can be effectively increased, the relative gravimeter body 1 is prevented from being disturbed by external vibration or movement, meanwhile, the design of the wavy surface of the insertion plate 46 can increase the friction between the insertion plate 46 and the land, so that stronger grip is provided, and the stability of the relative gravimeter body 1 during use is ensured.

[0018] The supporting device 4 further comprises a motor 47 and a plurality of lower swing plates 413, the motor 47 is fixed at the bottom of the relative gravimeter body 1, a threaded rod 48 is fixed at the bottom of the output end of the motor 47, a threaded ring 49 is threadedly connected to the outside of the threaded rod 48, three T-shaped connecting rods 410 are uniformly fixed on the outer circumference of the threaded ring 49, L-shaped push rods 411 are fixed on both sides of the side of the T-shaped connecting rod 410 away from the threaded ring 49, a plurality of notches are formed in the outside of the bottom plate 42, two notches in the plurality of notches are a group, the two notches are respectively located on both sides of the sliding plate 45, and the plurality of lower swing plates 413 are respectively hinged in the plurality of notches in the bottom plate 42 (as shown in Figure 4 The top of the lower swing plate 413 is fixed with a U-shaped rod 412, the end of the L-shaped push rod 411 away from the T-shaped connecting rod 410 is slidingly installed in the inside of the U-shaped rod 412, the bottom of the lower swing plate 413 is provided with an inclined surface, and the inclined surface of the lower swing plate 413 decreases in the direction of the sliding plate 45. Through the arrangement of the above structure, the inclined surface of the lower swing plate 413 presses the soil to extrude in the direction of the insertion plate 46 (as shown in​Figure 8 As shown in the figure, this allows the soil to contact the insertion plate 46 more tightly, thereby strengthening the fixing effect of the insertion plate 46 and preventing the relative gravity meter body 1 from being affected by external vibration or movement during use.

[0019] When the relative gravimeter body 1 is used in field exploration, the soft ground surface is first compacted. Then, the relative gravimeter body 1 is placed on the ground, and the base plate 42 will contact the ground first. Rotating the screw 43 causes the screw 43 to move downwards and be driven into the ground by the thread action between the screw 43 and the screw block 44. During the downward movement of the screw 43, it pushes the sliding plate 45 downwards, which in turn pushes the insertion plate 46 downwards. The insertion plate 46 is then inserted into the ground. After the insertion plate 46 is inserted into the ground, it can effectively increase the stability of the relative gravimeter body 1 on the ground and prevent the relative gravimeter body 1 from being disturbed by external vibrations or movement. At the same time, the wavy surface design of the insertion plate 46 can increase the friction between the insertion plate 46 and the ground. The friction force provides stronger grip, ensuring the relative gravimeter body 1 remains stable and does not shift during use. After the screw 43 is inserted into the soil, the motor 47 is started, which drives the threaded rod 48 to rotate. The threaded rod 48 drives the threaded ring 49 to push the T-shaped connecting rod 410 and the L-shaped push rod 411 downward. The L-shaped push rod 411 slides along the inside of the U-shaped rod 412 and pushes the lower swing plate 413 downward. The inclined surface of the lower swing plate 413 presses the soil against the insertion plate 46, making the soil more tightly contact the insertion plate 46, thereby strengthening the fixing effect of the insertion plate 46 and preventing the relative gravimeter body 1 from being affected by external vibration or movement during use.

[0020] Please see Figure 1 - Figure 8 Based on the above embodiments, in another embodiment of the present invention, a fastening device 5 is provided at the base plate 42. The fastening device 5 includes three T-shaped columns 51, which are uniformly fixed to the top of the base plate 42. An L-shaped sliding rod 52 is slidably installed on the top of each of the three T-shaped columns 51, and a spring is provided between the L-shaped sliding rod 52 and the T-shaped column 51. A collar 53 is fixed between the bottoms of the three L-shaped sliding rods 52. A limiting component for limiting the position of the collar 53 is provided at the edge of the collar 53. Through the above structure, the collar 53 increases the contact area between the base plate 42 and the ground, thereby effectively improving the friction between the base plate 42 and the ground and preventing the base plate 42 from slipping or shifting during use, especially on soft soil.

[0021] The fastening device 5 also includes a fixing ring 56, three L-shaped ball blocks 54, and three semicircular plates 55. The three L-shaped ball blocks 54 are respectively fixed to the side of the three L-shaped sliding rods 52 near the center of the base plate 42. The fixing ring 56 is fixed to the lower outer wall of the threaded rod 48. The three semicircular plates 55 are evenly fixed to the outer wall of the fixing ring 56. A ball block is fixed to the bottom of the end of the L-shaped ball block 54 away from the L-shaped sliding rod 52. The ball block of the L-shaped ball block 54 is located on the movement trajectory of the semicircular plate 55. Through the above structure, the collar 53 moves up and down reciprocally, thereby causing the collar 53 to swing down. As the inclined surface of plate 413 presses the soil towards the insertion plate 46, the collar 53 compacts the soil around the base plate 42. This prevents the soil from being compressed to a certain extent when pressure is applied by the lower plate 413, which could lead to the insertion plate 46 being loosely fixed and thus causing it to loosen or shift. By compacting the soil, the collar 53 makes the soil denser and stronger, enhancing the friction and fixing force between the insertion plate 46 and the soil. This can effectively reduce the risk of the insertion plate 46 loosening or shifting due to external disturbances (such as vibration, wind, soil movement, etc.).

[0022] The limiting components include a trapezoidal block 57, a fixing plate 58, an elastic telescopic plate 59, and an L-shaped abutment plate 510. The trapezoidal block 57 is fixed to the bottom of the slide plate 45 on the side away from the center of the base plate 42. A sliding cavity is formed on the top of the screw block 44 on the side away from the center of the base plate 42. The L-shaped abutment plate 510 is slidably installed inside the sliding cavity of the screw block 44, and a spring is provided between the L-shaped abutment plate 510 and the inner wall of the sliding cavity of the screw block 44. The fixing plate 58 is fixed to the top of the collar 53. The fixing end of the elastic telescopic plate 59 is on the side of the fixing plate 58 near the screw block 44, and the telescopic end of the elastic telescopic plate 59 penetrates through the outer wall of the screw block 44 and extends into the sliding cavity of the screw block 44. The top of the L-shaped abutment plate 510... The side away from the elastic telescopic plate 59 is arc-shaped, and the bottom of the trapezoidal block 57 is inclined. The arc of the L-shaped contact plate 510 is located on the movement trajectory of the inclined surface of the trapezoidal block 57. When the screw 43 does not push the slide plate 45 downward, the above structure allows the telescopic end of the elastic telescopic plate 59 and the sliding cavity of the screw block 44 to restrict the position of the collar 53 through the fixing plate 58, so that the base plate 42 can stably drive the collar 53 to contact the ground. When the screw 43 pushes the slide plate 45 downward, the above structure allows the telescopic end of the elastic telescopic plate 59 to no longer restrict the position of the collar 53 through the fixing plate 58, and the collar 53 can then compact the ground.

[0023] In use, when the base plate 42 contacts the ground, the base plate 42, along with the collar 53, contacts the ground. The collar 53 increases the contact area between the base plate 42 and the ground, thereby effectively improving the friction between the base plate 42 and the ground and preventing the base plate 42 from slipping or shifting during use, especially on soft soil. Simultaneously, when the threaded rod 48 rotates, it drives the fixed ring 56 to rotate, which in turn drives the semicircular plate 55 to rotate. When the semicircular plate 55 moves to the ball block position of the L-shaped ball block rod 54, it pushes the ball block of the L-shaped ball block rod 54, causing the L-shaped ball block rod 54 to move upwards. The L-shaped ball block rod 54, through the L-shaped sliding rod 52, drives the collar 53 to move upwards. When the semicircular plate 55 no longer pushes the ball block of the L-shaped ball block rod 54, the corresponding position of the L-shaped sliding rod 52... Under the action of the spring force, the L-shaped sliding rod 52 drives the collar 53 to reset and move downward. This process is repeated, and the collar 53 moves up and down. As the inclined surface of the lower swing plate 413 presses the soil towards the insertion plate 46, the collar 53 compacts the soil around the base plate 42. This prevents the soil from being squeezed to a certain extent when the lower swing plate 413 applies pressure, which could lead to the insertion plate 46 being not firmly fixed and thus causing the insertion plate 46 to loosen or shift. By compacting the soil, the collar 53 makes the soil more compact and firm, enhancing the friction and fixing force between the insertion plate 46 and the soil. This can effectively reduce the risk of the insertion plate 46 loosening or shifting due to external interference (such as vibration, wind, soil movement, etc.).

[0024] It is worth noting that when screw 43 is not pushing slide plate 45 downward, the telescopic end of elastic telescopic plate 59 will insert into the sliding cavity of screw block 44. The telescopic end of elastic telescopic plate 59 and the sliding cavity of screw block 44 will restrict the position of collar 53 through fixing plate 58, so that base plate 42 can stably drive collar 53 to contact the ground. When screw 43 pushes slide plate 45 downward, slide plate 45 moves downward with trapezoidal block 57. When the inclined surface of trapezoidal block 57 When the L-shaped contact plate 510 is moved to its arc-shaped position, the inclined surface of the trapezoidal block 57 pushes the arc of the L-shaped contact plate 510, causing the L-shaped contact plate 510 to move away from the screw block 44. The L-shaped contact plate 510 squeezes the telescopic end of the elastic telescopic plate 59, and the telescopic end of the elastic telescopic plate 59 is pushed out of the sliding cavity of the screw block 44. At this time, the telescopic end of the elastic telescopic plate 59 no longer restricts the position of the collar 53 through the fixing plate 58, and the collar 53 can then compact the ground.

[0025] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A mobile relative gravimeter, comprising a main body of the relative gravimeter, a display screen fixed to the front side of the main body of the relative gravimeter, and three levels evenly fixed to the top circumference of the main body of the relative gravimeter, characterized in that: A support device is provided at the bottom of the main body of the relative gravimeter. The support device includes three side frames, which are evenly fixed to the lower outer wall of the main body of the relative gravimeter. A base plate is fixed between the bottom of the three side frames. Three screw blocks are evenly fixed to the outer circumference of the base plate. The top of the three screw blocks is threaded through and connected with screws. Slide plates are slidably installed on the outside of the three side frames. A spring is provided between the slide plate and the base plate. An insert plate is fixed to the bottom of the side of the slide plate near the center of the base plate. The insert plate passes through the top of the base plate. The support device also includes a motor and several lower swing plates. The motor is fixed to the bottom of the main body of the gravimeter. A threaded rod is fixed to the bottom of the motor's output end. A threaded ring is connected to the external thread of the threaded rod. Three T-shaped connecting rods are evenly fixed to the outer circumference of the threaded ring. L-shaped push rods are fixed to both sides of the T-shaped connecting rods away from the threaded ring. Several notches are opened on the outside of the base plate, and two notches in the notches form a group. The two notches are located on both sides of the slide plate. Several lower swing plates are hinged to the inside of several notches on the base plate. A U-shaped rod is fixed to the top of the lower swing plate. The end of the L-shaped push rod away from the T-shaped connecting rod is slidably installed inside the U-shaped rod.

2. The flowing relative gravimeter according to claim 1, characterized in that: A circular hole is provided on the top of the side of the skateboard away from the center of the base plate, and the circular hole of the skateboard fits over the outside of the screw.

3. The flowing relative gravimeter according to claim 1, characterized in that: The round hole of the slide plate is fitted with the external clearance of the screw.

4. A flowing relative gravimeter according to claim 1, characterized in that: The side of the insert plate furthest from the center of the base plate is designed with a wavy surface.

5. A flowing relative gravimeter according to claim 4, characterized in that: The bottom of the lower board is sloped, and the slope of the lower board decreases towards the direction of the skateboard.

6. A flowing relative gravimeter according to claim 4, characterized in that: A fastening device is provided at the base plate. The fastening device includes three T-shaped columns, which are evenly fixed to the top of the base plate. An L-shaped slide rod is slidably installed on the top of each of the three T-shaped columns, and a spring is provided between the L-shaped slide rod and the T-shaped column. A collar is fixed between the bottom of the three L-shaped slide rods, and a limiting component is provided at the edge of the collar to limit the position of the collar.

7. A flowing relative gravimeter according to claim 6, characterized in that: The fastening device also includes a fixing ring, three L-shaped ball rods, and three semi-circular plates. The three L-shaped ball rods are respectively fixed on the side of the three L-shaped sliding rods near the center of the base plate. The fixing ring is fixed on the lower outer wall of the threaded rod, and the three semi-circular plates are evenly fixed on the outer wall of the fixing ring.

8. A flowing relative gravimeter according to claim 7, characterized in that: A ball block is fixed at the bottom of the end of the L-shaped ball block rod away from the L-shaped slide rod, and the ball block of the L-shaped ball block rod is located on the motion trajectory of the semi-circular plate.

9. A flowing relative gravimeter according to claim 6, characterized in that: The limiting components include a trapezoidal block, a fixed plate, an elastic telescopic plate, and an L-shaped abutment plate. The trapezoidal block is fixed to the bottom of the slide plate on the side away from the center of the base plate. The top of the screw block on the side away from the center of the base plate has a sliding cavity. The L-shaped abutment plate is slidably installed inside the sliding cavity of the screw block, and a spring is provided between the L-shaped abutment plate and the inner wall of the sliding cavity of the screw block. The fixed plate is fixed to the top of the collar. The fixed end of the elastic telescopic plate is on the side of the fixed plate close to the screw block. The telescopic end of the elastic telescopic plate penetrates the outer wall of the screw block and extends into the sliding cavity of the screw block.

10. A flowing relative gravimeter according to claim 9, characterized in that: The top of the L-shaped contact plate is curved on the side away from the elastic telescopic plate, and the bottom of the trapezoidal block is inclined. The arc of the L-shaped contact plate is located on the movement trajectory of the inclined surface of the trapezoidal block.

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