A relative gravimeter based on high-pressure suspension

Abstract

The present invention discloses a relative gravimeter based on high-pressure suspension, which relates to the technical field of relative gravimeters. The invention comprises a high-pressure cavity shell and a base mounted thereon, comprising a stator fixedly mounted on the base; a mover assembly coaxially movably mounted in the stator, comprising a mass block, a magnetic induction coil being mounted on the stator, and an electrostatic generating plate being mounted on the inner side of the stator. The relative gravimeter based on high-pressure suspension forms an electrostatic force field between the electrostatic generating plate and the side of the mass block, ionizing the surrounding air and charging dust particles with positive or negative charges, thereby collecting dust through the electrostatic force field. Air is then introduced into the high-pressure cavity shell through a filling port, so that the high-pressure airflow can be blown along the surface of the mass block. The swept dust and the dust falling due to the loss of electrostatic force roll down along the surface of the flap to the base, thereby preventing the weight of the dust from interfering with the actual mass of the mass block and protecting the mass block when the power is off.

Description

Technical Field

[0001] The present invention relates to the technical field of relative gravimeters, and in particular to a relative gravimeter based on high-pressure suspension. Background Art

[0002] The high-pressure suspension-based relative gravimeter is a high-precision geophysical exploration device. Its core principle is to measure tiny changes in the gravitational field by suspending a test mass in a high-pressure environment. The instrument uses an inert gas (such as nitrogen) to construct a high-pressure chamber (approximately 10-20 MPa). Internally, magnetic or air suspension technology maintains the mass in a quasi-free state, significantly reducing mechanical friction and environmental vibration interference. When the gravitational field changes, the mass produces nanometer-scale displacements. This displacement is precisely captured using a laser interferometer or capacitive sensor. Combined with a pressure compensation algorithm to eliminate the effects of air pressure fluctuations, the instrument achieves micro-gamma-level gravity measurement accuracy.

[0003] In conjunction with publication number CN108508497B, publication date 2019-06-18, a gravimeter based on a nonlinear superconducting magnetic spring, a superconducting magnetic spring oscillator and a displacement detection unit are disclosed; the superconducting magnetic spring oscillator includes a current-carrying coil and a test mass, the materials of the current-carrying coil and the test mass are both superconductors, the test mass is a cylinder with a middle partition, and current-carrying coils are provided at corresponding positions at both ends of the middle partition. The magnetic repulsion between the current-carrying coil and the test mass balances the gravity of the test mass, and the test mass is magnetically suspended; the resultant force of the magnetic force and gravity acting on the test mass has the property of a restoring force, the current-carrying coil and the test mass together constitute a vertical superconducting magnetic spring oscillator, and the magnetic repulsion between the current-carrying coil and the test mass has a nonlinear relationship with the distance between the two.

[0004] However, in the prior art including the above-mentioned patent, since the current-carrying coil is magnetic, dust particles are more likely to be magnetized. The magnetic dust particles will be attracted or repelled by the current-carrying coil, and the attracted dust will be concentrated near the current-carrying coil. The partition is located between the two current-carrying coils and is subjected to a larger magnetic field force, which makes it easy for this part of the dust to stick to the partition and affect the gravity of the inspection mass, while the repelled dust will float in the device and interfere with the electronic components of the device. Summary of the Invention

[0005] The purpose of the present invention is to provide a relative gravimeter based on high-pressure suspension to solve the above problems.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solution: a relative gravimeter based on high-pressure suspension, comprising a high-pressure chamber housing and a base mounted thereon, and further comprising a stator fixedly arranged on the base;

[0007] A mover assembly coaxially movably disposed within the stator includes a mass block. The stator is provided with a magnetic induction coil for balancing the gravity of the mass block so that the mass block is suspended, and the magnetic force of the magnetic induction coil is adjustable;

[0008] A displacement detection unit disposed in the high-pressure cavity housing and used to detect the displacement distance of the mass block;

[0009] An electrostatic generating plate is provided inside the stator, and the electrostatic generating plate and the magnetic induction coil are connected to the same power supply circuit;

[0010] A check plate is fixedly arranged in the high-pressure chamber housing, and its bottom side and the base are enclosed to form an ash storage channel;

[0011] A protective component is arranged on the base and surrounds the movable subassembly, including a rotatably arranged flap, which has a deflection position triggered in a power-off state. The head end of the flap under the deflection position supports and locks the movable subassembly, and the upper surface of the flap forms a channel for high-pressure airflow to be purged.

[0012] Preferably, a fan for dissipating heat from the stator is provided on the base.

[0013] Preferably, a recessed portion is provided on the base, and the recessed portion is divided by a flap under the deflection station into an air supply channel toward the electrostatic generating plate and an air inlet channel connected to the air supply channel.

[0014] Preferably, the magnetic induction coil includes an upper coil and a lower coil respectively arranged at the upper end and the lower end of the stator, and the spiral directions of the upper coil and the lower coil are opposite.

[0015] Preferably, the mover assembly further comprises an upper magnetic plate and a lower magnetic plate arranged at the upper and lower ends of the mass block, and the magnetic field directions of the upper magnetic plate and the lower magnetic plate are both arranged radially and are consistent.

[0016] Preferably, a dust-isolating plate is provided on the mass block, and an array of discharge electrodes facing the dust-isolating plate is provided on the static electricity generating plate.

[0017] Preferably, the tail end of the flap is provided with a return spring for bringing the tail end close to the base, and the tail end of the flap is fixedly provided with an attraction magnet attracted by the magnetic induction coil.

[0018] Preferably, a pressing plate for pressing the bottom of the movable subassembly is rotatably provided at the front end of the flap, and an elastic member for maintaining a default angle is provided on the pressing plate.

[0019] Preferably, it further comprises a positioning plate which is rotatably arranged at the front end of the flap and is used to support the side of the moving subassembly, and which moves synchronously with the pressure plate.

[0020] Preferably, a gear ring is fixedly provided on the pressure plate, and a gear meshing with the gear ring is fixedly provided on the positioning plate.

[0021] In the above-mentioned technical solution, the present invention provides a relative gravimeter based on high-voltage suspension, which has the following beneficial effects: an electrostatic force field is formed between the electrostatic generating plate and the side of the mass block, ionizing the surrounding air and charging dust particles with positive or negative charges, thereby collecting dust through the electrostatic force field. Air is then introduced into the high-pressure cavity housing through the filling port, allowing the high-pressure airflow to sweep along the surface of the mass block. The swept dust, along with dust that has lost its electrostatic force and fallen, rolls along the surface of the flap onto the base, preventing the weight of the dust from interfering with the actual mass of the mass block and protecting the mass block in the event of a power outage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 An overall three-dimensional schematic diagram provided for an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the internal structure of the high-pressure chamber housing provided in an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the overall explosion structure provided by an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of the internal structure of the stator and mover assembly provided in an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the base and protective assembly structure provided by an embodiment of the present invention;

[0028] Figure 6 A schematic diagram of the protection component structure provided by an embodiment of the present invention;

[0029] Figure 7 A schematic diagram of the cross-sectional structure of a protection component provided in an embodiment of the present invention;

[0030] Figure 8 A schematic diagram of the gear ring and gear structure provided in an embodiment of the present invention;

[0031] Figure 9 A schematic diagram of the internal structure of the device in the dust removal state provided by an embodiment of the present invention;

[0032] Figure 10A schematic diagram of the internal structure of a device in a circuit-off state provided by an embodiment of the present invention;

[0033] Figure 11 A schematic diagram of the internal structure of a device in a circuit-off state provided by an embodiment of the present invention;

[0034] Figure 12 A schematic diagram of the magnetic field direction of each structure of the first embodiment provided by the present invention;

[0035] Figure 13 A schematic diagram of the magnetic field direction of each structure of the second embodiment of the present invention;

[0036] Figure 14 For the embodiment of the present invention Figure 11 A magnified schematic diagram of the structure in the middle.

[0037] Description of reference numerals:

[0038] 1. High-pressure chamber shell; 11. Filling port; 12. Check plate; 2. Base; 21. Recessed portion; 22. Fixed magnet; 23. Return spring; 3. Stator; 31. Upper coil; 32. Lower coil; 33. Upper permanent magnet; 34. Lower permanent magnet; 35. Insulation coating; 36. Static generating plate; 37. Discharge electrode; 4. Mover assembly; 41. Upper magnetic plate; 42. Dust barrier; 43. Lower magnetic plate; 44. Mass block; 45. Moving permanent magnet; 5. Protection assembly; 51. Flip plate; 52. Pressure plate; 53. Positioning plate; 54. Flexible support; 55. Attracting magnet; 56. First rotating shaft; 561. Gear ring; 57. Second rotating shaft; 571. Gear; 58. Elastic member; 6. Fan. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] like Figure 1 - Figure 14 As shown, a relative gravimeter based on high-pressure suspension includes a high-pressure chamber housing 1 and a base 2 assembled thereon, and also includes a stator 3 fixedly arranged on the base 2;

[0041] The mover assembly 4 is coaxially arranged in the stator 3 and includes a mass block 44 (such as Figure 4 As shown), a magnetic induction coil is provided on the stator 3 for balancing the gravity of the mass block 44 so that the mass block 44 is suspended, and the magnetic force of the magnetic induction coil is adjustable;

[0042] A displacement detection unit disposed in the high-pressure cavity housing 1 and used to detect the displacement distance of the mass block 44;

[0043] like Figure 4 and Figure 5 As shown, an electrostatic generating plate 36 is provided inside the stator 3, and the electrostatic generating plate 36 and the magnetic induction coil are connected to the same power supply circuit;

[0044] like Figure 2 As shown, the anti-return plate 12 is fixedly arranged in the high-pressure chamber housing 1, and its bottom side is enclosed with the base 2 to form an ash storage channel;

[0045] like Figure 5 - Figure 14 As shown, the protection assembly 5 is arranged on the base 2 and surrounds the movable subassembly 4, including a rotatable flap 51. The flap 51 has a deflection position triggered in the power-off state. The head end of the flap 51 at the deflection position abuts against the movable subassembly 4 and is locked, and the upper surface of the flap 51 forms a channel for high-pressure airflow to be purged (such as Figure 10 and Figure 11 shown).

[0046] Specifically, the stator 3 and the mover assembly 4 can be selected from a variety of shapes with a regular polygonal horizontal cross-section, and the mover assembly 4 and the stator 3 are in a sliding fit. The high-pressure cavity housing 1 and the base 2 are assembled into one body, and then an inert gas such as nitrogen is filled into the filling port 11 opened on the high-pressure cavity housing 1. The power supply is started to energize the magnetic induction coil and form a magnetic field. The mass block 44 is magnetic, and the magnetic levitation force of the magnetic field on the mass block 44 overcomes the gravity of the mass block 44 itself, so that the mass block 44 is suspended and maintained in a balanced position. The change in gravity drives the mass block 44 to float up and down, and the displacement detection unit records and combines the function to calculate the current gravity. The above-mentioned electronic components are all technical common sense known to those skilled in the art and will not be elaborated here.

[0047] And when dust removal is required, the static generating plate 36 is started to provide mutually offsetting electrostatic forces to multiple sides of the mass block 44, so that an electrostatic force field is formed between the static generating plate 36 and the side of the mass block 44, and the static generating plate 36 generates corona, releasing a large number of free electrons and negative ions, ionizing the surrounding air and charging the dust particles, and the charged dust will be attracted by the electrostatic force and stay in the electrostatic force field, playing the role of collecting dust, and then the static generating plate 36 is turned off, so that the dust falls automatically. At this time, the flip plate 51 is in the non-deflected position, as shown in FIG. Figure 12 and Figure 13 As shown, the dust drop zone is located on the upper surface of flap 51. An insulating coating 35 is provided between the magnetic induction coil and the electrostatic generating plate 36 to prevent electromagnetic interference. Furthermore, the magnitude of the magnetic levitation force can be controlled by adjusting the current in the magnetic induction coil, making the equilibrium position height adjustable and facilitating calibration of the equilibrium position height of mass 44.

[0048] Furthermore, the flap 51 is rotatably mounted on the base 2. A driving motor may be provided on the base 2 to drive the flap 51 to deflect via the output shaft of the driving motor; or an electric telescopic rod may be provided to lift the flap 51 via the output end of the electric telescopic rod to deflect the flap 51; or a driving method known to those skilled in the art may be used to deflect the flap 51 to the deflection position. The driving motor or the electric telescopic rod then stops running to lock the flap 51. Figure 10 and Figure 11 As shown, the head ends of the multiple flaps 51 now form a supporting surface. A relay controls the circuitry of the drive motor or electric telescopic rod and the power circuitry of the magnetic induction coil and electrostatic generator 36. Specifically, when the power circuit is connected, the relay disconnects the drive motor or electric telescopic rod, preventing the flaps 51 from deflecting and thus preventing the mass 44 from moving. When the power circuit is disconnected, the magnetic levitation force disappears, causing the mass 44 to fall under its own weight. Simultaneously, the relay connects the drive motor or electric telescopic rod, causing the flaps 51 to deflect and support the falling mass 44, preventing damage to the mass 44 from the impact of the fall.

[0049] It can be concluded that, in the default state, the power circuit is off, the flap 51 is in the deflection position and supports the mass block 44, as shown in FIG. Figure 10 and Figure 11 The state of the middle flap 51. At this point, a downward-sloping channel is formed between the flap 51 and the side of the mass 44. Air is introduced into the high-pressure chamber housing 1 through the filling port 11, allowing the high-pressure airflow to sweep along the surface of the mass 44. Simultaneously, after the electrostatic field disappears, the falling dust, under the action of gravity, rolls along the surface of the flap 51 along with the swept dust to the edge of the base 2. The tail end of the flap 51 points toward the dust storage channel below the check plate 12. Because the check plate 12 is tilted and the opening of the dust storage channel faces the flap 51, the dust blown into the dust storage channel is guided by the airflow, reducing the chance of escaping toward the opening and preventing the weight of the dust from interfering with the actual mass of the mass 44. The presence of some charged dust polarizes nearby uncharged dust through electrostatic induction, generating an attraction similar to electrostatic adsorption, causing it to aggregate and reduce the chance of floating within the high-pressure chamber housing 1. When dust needs to be cleaned, simply open the high-pressure chamber housing 1 and wipe the edge of the base 2.

[0050] In the above-described technology, an electrostatic field is formed between the static electricity generating plate 36 and the side of the mass 44, ionizing the surrounding air and charging dust particles with positive or negative charges, thereby collecting dust. Air is then introduced into the high-pressure chamber housing 1 through the filling port 11, causing the high-pressure airflow to sweep along the surface of the mass 44. The swept dust, along with dust that has lost its electrostatic force and fallen, rolls along the surface of the flap 51 onto the base 2, preventing the weight of the dust from interfering with the actual mass of the mass 44 and protecting the mass 44 during power outages.

[0051] As a further embodiment provided by the present invention, a fan 6 for dissipating heat from the stator 3 is provided on the base 2 .

[0052] Specifically, the fan 6 is located at the center of the base 2, and a downward-slanting check plate 12 is fixedly provided on the inner wall of the high-pressure cavity housing 1. Figure 9 As shown. When dust removal or heat dissipation is required, the fan 6 and the electrostatic generating plate 36 are started. The fan 6 blows air upward to diffuse the airflow along the inner wall of the stator 3, thereby reducing the temperature of the stator 3 and preventing the magnetic coil from overheating after long-term use. Moreover, due to the large driving force of the airflow, the floating range of the mass block 44 is large when blown by the fan 6, which can be clearly distinguished from the fluctuation range of normal detection, thus avoiding data misreading. The airflow is separated by the bottom of the mover assembly 4 so that the airflow is located in the electrostatic force field formed by the mover assembly 4 and the inner wall of the stator 3, as shown. Figure 9 As shown, the airflow flows along the inner wall of the stator 3 to form a stable laminar flow, and the laminar flow direction is parallel to the static generating plate 36.

[0053] Furthermore, the airflow blows away the deposited dust, causing it to be adsorbed within the electrostatic field. Subsequently, the electrostatic generating plate 36 and the fan 6 are simultaneously turned off, and the dust within the electrostatic field, under the action of gravity, rolls down the surface of the flap 51 to the edge of the base 2 and the dust storage channel located below the check plate 12. At this point, the dust is less likely to continue floating, and the high-pressure chamber housing 1 is opened to clear the edge of the base 2, reducing the interference of dust with other internal structures.

[0054] As another embodiment provided by the present invention, a lower recess 21 is provided on the base 2, and the lower recess 21 is divided by a flap 51 under the deflection station into an air supply channel toward the electrostatic generating plate 36 and an air inlet channel connected to the air supply channel.

[0055] Specifically, the fan 6 is located between the flaps 51 under the deflection station. At this time, the flaps 51 form a bucket-shaped structure with a larger top and a smaller bottom. The bucket-shaped structure completely covers the vertical projection of the electrostatic field. When the static generating plate 36 is closed, dust falls on the upper surface of the bucket-shaped structure and enters the dust storage channel along with the flap 51 to the deflection station. The bottom end of the filling port 11 extends into the high-pressure chamber housing 1, which plays a role in separating the airflow. Figure 9As shown. The airflow flows from the lower end to the upper end of the bucket-shaped structure, which is the air supply channel; then the airflow enters the electrostatic force field and is guided by the side of the filling port 11. The airflow enters between the stator 3 and the high-pressure cavity shell 1 and flows downward, and is finally guided by the lower surface of the flap 51 and the check plate 12 and re-enters the lower recess 21, which is the air inlet channel. The airflow forms a circulation around the side of the stator 3, which can make the dust in the high-pressure cavity shell 1 flow along the circulation and repeatedly pass through the electrostatic force field, and finally be concentrated in the electrostatic force field, which has a dust collection effect. At the same time, the circulation can effectively reduce the temperature of the stator 3, preventing the temperature of the electrostatic generating plate 36 or the magnetic induction coil from being too high, which may cause the insulating coating 35 to melt or fail.

[0056] As another embodiment provided by the present invention, the magnetic induction coil includes an upper coil 31 and a lower coil 32 respectively provided at the upper end and the lower end of the stator 3 , and the spiral directions of the upper coil 31 and the lower coil 32 are opposite.

[0057] Specifically, an upper permanent magnet 33 and a lower permanent magnet 34 are respectively provided at the upper and lower ends of the stator 3, wherein the magnetic field direction of the upper permanent magnet 33 is consistent with the magnetic field direction of the upper coil 31 after power is applied, and the magnetic field direction of the lower permanent magnet 34 is consistent with the magnetic field direction of the lower coil 32, so that two magnetic fields with opposite directions are formed at the upper and lower ends of the stator 3. Figure 12 and Figure 13 The arrow in the middle indicates the direction of the magnetic field from the S pole to the N pole. Figure 12 and Figure 13 The magnetic fields at the upper and lower ends of the stator 3 intersect at the center of the stator 3, so that magnetic dust is repelled or attracted by both ends at the center of the stator 3, thereby forming a dust collection location. This location is located on the return path of the airflow, further enhancing the attraction of magnetic dust. Combined with the setting of the electrostatic field, a magnetic-electric combined dust removal mode is formed.

[0058] As another embodiment provided by the present invention, the mover assembly 4 further includes an upper magnetic plate 41 and a lower magnetic plate 43 arranged at the upper and lower ends of the mass block 44, and the magnetic field directions of the upper magnetic plate 41 and the lower magnetic plate 43 are both arranged radially and consistent.

[0059] Specifically, the upper magnetic plate 41 and the lower magnetic plate 43 are fixed with a moving permanent magnet 45, wherein the arrangement of the moving permanent magnet 45 is as follows: Figure 4 , when the direction of the magnetic field in the stator 3 is as follows Figure 12As shown, the magnetic field direction of the moving permanent magnet 45 points from the S pole to the N pole, pointing toward the inner wall of the stator 3. In the default state, the supporting surface formed by the front end of the flap 51 is at the same height as the bottom surface of the lower permanent magnet 34, that is, the height of the bottom moving permanent magnet 45 is at the same height as the bottom of the lower permanent magnet 34. At this time, the N pole of the bottom moving permanent magnet 45 is opposite the N pole of the lower permanent magnet 34, while the N pole of the top moving permanent magnet 45 is attracted by the S pole of the upper permanent magnet 33, causing the moving permanent magnet 45 to be subjected to the upward magnetic levitation force from the stator 3, thereby driving the mass block 44 upward until it is suspended.

[0060] Furthermore, as another alternative embodiment, the direction of the magnetic field in the stator 3 is as follows: Figure 13 As shown, the magnetic field direction of the moving permanent magnet 45, with the south pole pointing toward the north pole, points toward the axis. At this time, the south pole of the moving permanent magnet 45 at the bottom is opposite the south pole of the lower permanent magnet 34, while the south pole of the moving permanent magnet 45 at the top is attracted by the north pole of the upper permanent magnet 33. As a result, the moving permanent magnet 45 is subjected to the upward magnetic levitation force from the stator 3, driving the mass 44 upward until it reaches the equilibrium position. Furthermore, when the magnetic induction coil is de-energized, the upward magnetic levitation force on the moving permanent magnet 45 is still exerted due to the presence of the upper and lower permanent magnets 33 and 34, hindering the mass 44 from falling and slowing its descent.

[0061] As another embodiment provided by the present invention, a dust-shielding plate 42 is provided on the mass block 44 , and discharge electrodes 37 facing the dust-shielding plate 42 are arranged in an array on the static electricity generating plate 36 .

[0062] Specifically, the discharge electrode 37 is used for tip discharge, generating a corona effect and ionizing passing dust. The dust barrier 42 is made of plastic and coated with a conductive material (such as ITO or graphene) to make it an effective dust collecting electrode. During dust removal, the power is turned on to energize the magnetic induction coil and the static generating plate 36. Combined with the blowing of the fan 6, the negatively charged dust is driven by the Coulomb force in the electric field and is attracted to the dust barrier 42, while the magnetic dust is suspended in the middle of the stator 3. The power is then turned off, and some dust, after losing the electrostatic or magnetic field, falls due to gravity. As mass 44 descends, flap 51 deflects to the deflection position, and mass 44 then lands on the front end of flap 51. This oscillation causes most of the dust on dust screen 42 to fall onto the upper surface of flap 51. Combined with the high-pressure airflow blowing against the surface of mass 44 (i.e., dust screen 42), dust enters the dust storage channel below check plate 12. After a combined magnetic and electric dust removal process, most of the dust within high-pressure chamber housing 1 reaches the edge of base 2. The dust then gathers under the action of the charged or magnetic dust, and ceases to float. The instrument can then be used normally to monitor gravity, activating the magnetic induction coil and deactivating static electricity generating plate 36.

[0063] As the optimal embodiment provided by the present invention, a return spring 23 is provided at the tail end of the flap 51 for bringing the tail end close to the base 2, and an attraction magnet 55 attracted by the magnetic induction coil is fixedly provided at the tail end of the flap 51.

[0064] Specifically, the magnetic force direction of the attracting magnet 55 is consistent with the magnetic field direction of the lower permanent magnet 34 and the lower coil 32. A fixed magnet 22 is provided on the base 2 for adsorbing the attracting magnet 55. The magnetic force of the fixed magnet 22 is smaller than the magnetic field force of the lower permanent magnet 34 and the lower coil 32. The magnetic field direction of each magnetic field is from the S pole to the N pole. Figure 12 and Figure 13 As shown. The attracting magnet 55 is attracted by the lower permanent magnet 34 and the lower coil 32, that is, the attracting magnet 55 has a tendency to cling to the bottom end of the stator 3. In the default state, the magnetic induction coil is disconnected, and the magnetic force of the lower coil 32 disappears. At this time, the magnetic force of the lower permanent magnet 34 cannot overcome the pulling force of the reset spring 23 on the attracting magnet 55, causing the tail end of the flap 51 to approach the base 2, and the head end of the flap 51 to rise upward to form a supporting surface, and as shown Figure 10 and Figure 11 As shown, the flap 51 automatically supports the mover assembly 4 when the circuit is disconnected, thereby protecting the mover assembly 4. When the magnetic induction coil is energized, the attracting magnet 55 is attracted by the lower permanent magnet 34 and the lower coil 32, causing the tail end of the flap 51 to approach the bottom end of the stator 3. Compared with the conventional technical means of driving the flap 51 by a motor or an electric telescopic rod, the provision of the attracting magnet 55 can respond to the on and off of the magnetic induction coil in a timely manner without the use of a relay, and the mechanical structure is simple, avoiding the electromagnetic interference that may be caused by the use of a drive source, reducing the required equipment, and lowering the actual cost. At this time, the head ends of the multiple flaps 51 tilt downward and form a bucket-shaped structure surrounding the fan 6.

[0065] As another embodiment provided by the present invention, a pressing plate 52 for pressing the bottom of the movable subassembly 4 is rotatably provided at the front end of the flap 51 , and an elastic member 58 for maintaining a default angle is provided on the pressing plate 52 .

[0066] Specifically, the pressure plate 52 maintains a default angle through the elastic member 58. When the head end of the flap 51 is lifted upward, the pressure plate 52 rises upward under the support of the elastic member 58. The movable subassembly 4 in the falling process will first contact the pressure plate 52. Then the elastic member 58 bends and accumulates force, so that the supporting force of the pressure plate 52 on the movable subassembly 4 gradually increases, avoiding a large impact force on the movable subassembly 4. The setting of the elastic member 58 can play a protective role, so that when the equipment as a whole shakes, the force transmitted to the movable subassembly 4 is weakened by the elastic member 58.

[0067] As another embodiment provided by the present invention, it also includes a positioning plate 53 rotatably arranged at the front end of the flap 51 and used to support the side of the moving subassembly 4 , which keeps synchronous movement with the pressing plate 52 .

[0068] Specifically, a gear ring 561 is fixedly provided on the pressure plate 52, and a gear 571 is fixedly provided on the positioning plate 53 and is meshed with the gear ring 561. The pressure plate 52 is rotatably provided at the front end of the flap 51 via the first rotating shaft 56, while the positioning plate 53 is rotatably provided at the front end of the flap 51 via the second rotating shaft 57. The gear ring 561 and the gear 571 are respectively provided on the first rotating shaft 56 and the second rotating shaft 57. The transmission ratio of the gear ring 561 and the gear 571 is 1:5. During the falling process, the movable subassembly 4 will preferentially contact the pressure plate 52. Figure 10 As shown, the pressure plate 52 tilts downward and drives the gear ring 561 to rotate, thereby driving the gear 571 toward the side of the dust barrier 42, causing the positioning plate 53 to clamp the side of the dust barrier 42. Since the pressure plate 52 and the positioning plate 53 are linked, when the actuator assembly 4 presses down on the pressure plate 52, it drives the positioning plate 53 to apply pressure, and the position of the positioning plate 53 is restricted by the dust barrier 42, causing the pressure plate 52 to be locked. At the same time, a flexible support 54 is fixedly provided on the positioning plate 53. When the positioning plate 53 clamps the dust barrier 42, the flexible support 54 gently taps the dust barrier 42, helping to shake off dust on the surface of the dust barrier 42. The dust falls downward onto the upper surface of the pressure plate 52, then enters the upper surface of the flap 51 along the pressure plate 52, and finally rolls down to the edge of the base 2.

[0069] Working Principle: The high-pressure chamber housing 1 and base 2 are assembled into one body. An inert gas, such as nitrogen, is then filled into the filling port 11 provided in the high-pressure chamber housing 1. Activating the power supply energizes the magnetic induction coil, generating a magnetic field that magnetizes the mass 44. The magnetic levitation force exerted by this magnetic field overcomes the mass 44's own gravity, causing it to levitate and maintain its equilibrium position. Changes in gravity drive the mass 44 up and down, and the displacement detection unit records this information and combines it with a function to calculate the current gravity.

[0070] When dust removal is required, the magnetic induction coil and the electrostatic generating plate 36 are activated simultaneously, causing the magnetic dust to be repelled or attracted by both the upper and lower ends at the center of the stator 3, thereby forming a dust collection area. Simultaneously, the airflow forms a circular flow around the sides of the stator 3, causing the dust within the high-pressure chamber housing 1 to flow along the circular flow and repeatedly pass through the electrostatic field. Negatively charged dust is driven by the Coulomb force in the electric field and adsorbed on the dust barrier 42, while magnetic dust is suspended in the middle of the stator 3. The power is then turned off, and some dust loses its electrostatic or magnetic force and falls due to gravity. As the mass block 44 falls, the flap 51 deflects to the deflection position, and the mass block 44 then falls to the head end of the flap 51.

[0071] The moving component 4 will first contact with the pressing plate 52 during the falling process. Figure 10 As shown, the pressure plate 52 tilts downward, driving the gear ring 561 to rotate, thereby driving the gear 571 toward the side of the dust barrier 42, causing the positioning plate 53 to clamp the side of the dust barrier 42. At the same time, a flexible support 54 is fixedly provided on the positioning plate 53. When the positioning plate 53 clamps the dust barrier 42, the flexible support 54 gently taps the dust barrier 42, helping to shake off dust on the surface of the dust barrier 42 and let the dust fall downward onto the upper surface of the pressure plate 52.

[0072] Under the action of gravity, the dust rolls down the surface of the flap 51 to the edge of the base 2 and into the dust storage channel below the check plate 12. The presence of some charged or magnetic dust polarizes nearby uncharged dust through electrostatic induction, generating an attraction similar to electrostatic adsorption. Magnetic dust, on the other hand, attracts opposite poles, causing them to cluster together, thus reducing the chance of floating within the high-pressure chamber housing 1.

[0073] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A relative gravimeter based on high-pressure suspension, comprising a high-pressure chamber housing (1) and a base (2) mounted thereon, characterized in that: It also includes a stator (3) fixedly arranged on the base (2); A mover assembly (4) coaxially movably arranged in a stator (3) includes a mass block (44), wherein the stator (3) is provided with a magnetic induction coil for balancing the gravity of the mass block (44) so ​​as to suspend the mass block (44), and the magnetic force of the magnetic induction coil is adjustable; A displacement detection unit disposed in the high-pressure cavity housing (1) and used to detect the displacement distance of the mass block (44); An electrostatic generating plate (36) is provided inside the stator (3), and the electrostatic generating plate (36) and the magnetic induction coil are connected to the same power supply circuit; A check plate (12) is fixedly arranged in the high-pressure chamber housing (1), and its bottom side is enclosed with the base (2) to form an ash storage channel; A protective assembly (5) disposed on a base (2) and surrounding a movable subassembly (4) comprises a rotatably arranged flap (51), wherein the flap (51) has a deflection position triggered in a power-off state, wherein the head end of the flap (51) supports and locks the movable subassembly (4) at the deflection position, and the upper surface of the flap (51) forms a channel for high-pressure airflow to be purged.

2. A relative gravimeter based on high pressure suspension according to claim 1, characterized in that: A fan (6) for dissipating heat from the stator (3) is provided on the base (2).

3. A relative gravimeter based on high pressure suspension according to claim 1, characterized in that: A lower concave portion (21) is provided on the base (2), and the lower concave portion (21) is divided by a flap (51) under the deflection station into an air supply channel toward the static electricity generating plate (36) and an air inlet channel connected to the air supply channel.

4. A relative gravimeter based on high pressure suspension according to claim 1, characterized in that: The magnetic induction coil comprises an upper coil (31) and a lower coil (32) respectively arranged at the upper end and the lower end of the stator (3), and the spiral directions of the upper coil (31) and the lower coil (32) are opposite.

5. The relative gravimeter based on high pressure suspension according to claim 1, characterized in that: The mover assembly (4) further comprises an upper magnetic plate (41) and a lower magnetic plate (43) arranged at upper and lower ends of the mass block (44), and the magnetic field directions of the upper magnetic plate (41) and the lower magnetic plate (43) are both arranged radially and are consistent.

6. A relative gravimeter based on high pressure suspension according to claim 1, characterized in that: A dust-isolating plate (42) is provided on the mass block (44), and discharge electrodes (37) facing the dust-isolating plate (42) are arranged in an array on the static electricity generating plate (36).

7. The relative gravimeter based on high pressure suspension according to claim 1, characterized in that: The tail end of the flap (51) is provided with a return spring (23) for bringing the tail end close to the base (2), and the tail end of the flap (51) is fixedly provided with an attracting magnet (55) attracted by the magnetic induction coil.

8. The relative gravimeter based on high pressure suspension according to claim 1, characterized in that: The front end of the flap (51) is rotatably provided with a pressing plate (52) for pressing the bottom of the movable subassembly (4), and an elastic member (58) for maintaining a default angle is provided on the pressing plate (52).

9. A relative gravimeter based on high pressure suspension according to claim 8, characterized in that: It also includes a positioning plate (53) that is rotatably arranged at the front end of the flap (51) and is used to support the side of the moving subassembly (4), and the positioning plate (53) moves synchronously with the pressing plate (52).

10. A relative gravimeter based on high pressure suspension according to claim 9, characterized in that: A gear ring (561) is fixedly provided on the pressure plate (52), and a gear (571) meshing with the gear ring (561) is fixedly provided on the positioning plate (53).

Images