Liquid floating type anti-shock pressure gauge

Abstract

The invention relates to a liquid floating type anti-shock pressure gauge which is composed of an inner pressure gauge, an outer surface frame, an outer floating frame, an inner floating frame and a pressure regulator. The inner pressure gauge comprises a shell, a pressure sensor, a conversion bridge module, a battery and a pressure data output module; a sealing cover plate is arranged at the front end of the shell; a pressure data output module is attached to the inner side; a pressure driving cavity is formed in the outer surface frame and filled with transfer liquid, and a pressure connector is arranged at the bottom and connected with a pressure source; the outer floating frame is composed of an inner supporting frame and an outer supporting frame, and a buoyancy cavity is formed between the inner supporting frame and the outer supporting frame and filled with buoyancy liquid. The pressure regulator is located on the outer wall of the outer surface frame and comprises a pressure regulating piston assembly and a linear regulating mechanism. The inner floating frame is connected with the inner supporting frame through the elastic connecting rod, the inner meter shell is fixed to the inner floating frame, and the pressure sensor is communicated with the interior of the inner supporting frame.

Description

Technical Field

[0001] The invention relates to a liquid floating anti-vibration pressure gauge, belonging to the field of pressure detection equipment. Background Art

[0002] The current anti-seismic pressure gauge mainly fills the pressure gauge with shock-absorbing materials and strengthens the outer shell components to reduce the impact of the external environment on the sensors and display components inside the gauge. At the same time, a set of piston mechanisms that transmit pressure are used to block the working medium and the internal area of ​​the pressure gauge head; however, because the working environment of the pressure gauge is relatively complex, high temperature, corrosive, and volatile pressure media will not only cause a certain degree of aging of the shock-absorbing materials inside the pressure gauge, resulting in shock absorption failure, but also leakage of the layout pressure medium due to vibration, ultimately leading to the failure of the sensor inside the gauge head. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the technical problems in the prior art and provide a liquid floating shock-resistant pressure gauge.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A liquid-floating seismic-resistant pressure gauge, comprising: An internal pressure gauge, the internal pressure gauge comprises an inner gauge housing, a pressure sensor is arranged in a ring array on the inner gauge housing, a sensing end of the pressure sensor is connected to the outer space of the inner gauge housing, a conversion bridge module for connecting the pressure sensor and a battery for driving the conversion bridge module are fixed in the inner gauge housing, a sealing cover plate is arranged at the front end of the inner gauge housing, a pressure data output module is attached to the inner side of the sealing cover plate, and the pressure data output module is connected to the conversion bridge module; An outer frame, wherein a pressure driving chamber is arranged in the outer frame, and the pressure driving chamber is filled with a pressure transmission liquid. A pressure connector is arranged at the bottom of the outer frame, and the pressure connector includes a pressure connecting pipe. A pressure transmission piston assembly is arranged in the pressure connecting pipe. One end of the pressure transmission piston assembly is connected to the pressure source through the pressure connecting pipe, and the other end of the pressure transmission piston assembly is connected to the pressure driving chamber through the pressure connecting pipe. A first observation cover is sealed and fixed at the longitudinal end of the outer frame; The outer floating frame comprises an inner supporting frame and an outer supporting frame arranged in concentric circles with each other, an annular buoyancy chamber is arranged between the inner supporting frame and the outer supporting frame, the buoyancy chamber is filled with buoyancy liquid, the inner supporting frame and the outer supporting frame are coaxially fixed by a pressure regulating tube arranged in an annular array; the pressure regulating tube is made of elastic material, the two ends of the pressure regulating tube are opened on the surface of the inner supporting frame and the outer supporting frame and are sealed and connected between the inner supporting frame and the outer supporting frame; a second observation cover is sealed and fixed at the longitudinal end of the outer floating frame through the outer supporting frame and the inner supporting frame; An inner floating frame, the inner floating frame is elastically connected to the inner wall of the inner support frame through an elastic connecting rod, the inner gauge housing of the inner pressure gauge is fixedly connected to the inner floating frame, a plurality of pressure transmission holes are arranged in an annular array on the inner floating frame, and the input end of the pressure sensor is connected to the inside of the inner support frame through the pressure transmission holes; A pressure regulator is fixed to the outer wall of the outer frame. The pressure regulator includes a pressure regulating piston assembly. The pressure regulating piston assembly includes a pressure regulating piston shell. An elastic connecting tube is fixed to the front end of the pressure regulating piston shell. The elastic connecting tube passes through the pressure driving chamber and is connected to the buoyancy chamber. A linear adjustment mechanism is arranged at the end of the pressure regulating piston shell. The pressure regulating piston block of the pressure regulating piston assembly is fixedly connected to the linear telescopic end of the linear adjustment mechanism.

[0005] As a further improvement of the present invention, two groups of first sealing protrusion rings are arranged at the front end of the pressure regulating tube, and the first sealing protrusion rings are in sealing contact with the inner and outer walls of the outer support frame; a group of second sealing protrusion rings are arranged at the rear end of the pressure regulating tube, and the second sealing protrusion rings are in sealing contact with the outer wall of the inner support frame; a plurality of connecting rings are arranged in an annular array on the wall surface of the inner support frame, and the tail end of the pressure regulating tube is inserted into the connecting ring; The pressure regulating tube can adjust the volume of the entire buoyancy chamber through its own elastic deformation to adjust the default pressure of the pressure transmission liquid, and the elastic force of the pressure regulating tube itself can provide a buffer for nonlinear changes in pressure.

[0006] As a further improvement of the present invention, a limiting ring is sleeved on the outer support frame, and a ring array on the limiting ring is provided with a plurality of extended openings for passing the front end of the pressure-regulating tube; the limiting ring is pressed against the surface of the first sealing ring located on the outside of the outer support frame; the limiting ring can prevent the pressure-regulating tube from falling out of the outer support frame due to excessive positive or negative pressure, thereby ensuring the stability of the structure.

[0007] As a further improvement of the present invention, a support frame is provided inside the internal pressure gauge, the outer frame of the support frame contacts the inner wall of the internal pressure gauge, a packaging groove is provided in the middle of the support frame, the conversion bridge module and the battery are fixed in the packaging groove by a sealant, and a plurality of inlay grooves are provided in an annular array at the outer ring position of the support frame corresponding to the packaging groove, and the end of the pressure sensor is embedded in the inlay groove; The support frame can support the pressure sensor and other electrical components, and can also support the shell of the internal pressure gauge as a skeleton, reducing the possibility of deformation of the shell of the internal pressure gauge due to pressure and improving the fixing stability of each electrical component.

[0008] As a further improvement of the present invention, a plurality of elastic support rods are arranged in a circular array on the inner wall of the inner support frame, an elastic bending portion is arranged in the middle of the elastic support rods, and the ends of the elastic support rods are connected to the outer wall of the inner floating frame; The elastic support rod can effectively provide floating support for the inner floating frame, thereby preventing the outer support frame from directly impacting the inner floating frame when colliding with the inner wall of the outer frame.

[0009] As a further improvement of the present invention, a plurality of clamping seats are arranged in a circular array on the inner wall of the inner support frame, and a circular clamping groove is arranged on the side wall of the clamping seat, and one end of the elastic support rod is wound into the clamping groove; a plurality of plug holes are arranged in a circular array on the outer wall of the inner floating frame, and the other end of the elastic support rod is inserted into the plug hole; One end of the elastic support rod is wound and clamped to fix it, and the other end is inserted to fix the elasticity; when installing, it can be inserted into the inner floating frame first, and then the clamping seat can be fixed by clamping, which is convenient and quick.

[0010] As a further improvement of the present invention, the inner floating frame comprises an inner floating frame and an outer floating frame, an annular flow guiding cavity is arranged between the inner floating frame and the outer floating frame, a plurality of connecting ribs are arranged in an annular array between the inner floating frame and the outer floating frame, and a flow spoiler opening is arranged in the middle of the connecting ribs; wherein the pressure transmission hole is arranged on the outer floating frame, and the pressure detection tube is connected with the pressure transmission hole through the flow guiding cavity; The connecting ribs can not only improve the strength of the internal floating frame, but also ensure that pressure extrusion will not cause deformation of the internal pressure gauge, thereby affecting data accuracy.

[0011] As a further improvement of the present invention, the linear adjustment mechanism includes a support plate arranged at the end of the pressure regulating piston housing, an adjusting screw is connected to the support plate by threads, the linear telescopic end is located at the end of the adjusting screw, and the end of the adjusting screw is rotatably connected to the pressure regulating piston block; The adjusting screw can conveniently adjust the pressure inside the buoyancy chamber by adjusting the pressure regulating piston block, thereby conveniently calibrating the pressure gauge.

[0012] As a further improvement of the present invention, a transfer tube made of polyformaldehyde is fixedly connected to the inner wall at the top of the pressure connecting tube by threads, and a connection hole with a threaded structure is arranged on the inner ring of the transfer tube; wherein the pressure transmission piston assembly comprises a pressure transmission piston housing, a support spring is arranged between the pressure transmission piston block and the front inner wall of the pressure transmission piston housing, the front end of the pressure transmission piston housing is fixed to the front inner wall of the connecting hole by threads, and the side wall of the pressure transmission piston housing is provided with a first limiting protrusion, and the first limiting protrusion is in fixed contact with the top of the transfer tube; a transfer piston assembly is also connected to the inner wall at the tail end of the connecting hole, the transfer piston assembly comprises a transfer piston housing, the side wall of the transfer piston housing is provided with a second limiting protrusion, and the second limiting protrusion is in fixed contact with the bottom of the transfer tube, a sliding sleeve is fixed to the inner wall of the transfer piston housing, a piston column is slidingly and sealingly connected in the sliding sleeve, and the front end of the piston column is fixedly connected to the pressure transmission piston block; the end of the transfer tube is connected to the pressure source through the pressure connecting tube; The transfer tube made of polyoxymethylene can block the influence of high-temperature and low-temperature pressure media on the pressure transmission medium in the pressure gauge to a certain extent. At the same time, with its own corrosion resistance, it can ensure the structural strength.

[0013] As a further improvement of the present invention, an annular spoiler ring extending toward the center of the pressure driving chamber is arranged on the inner wall of the pressure driving chamber, and a spoiler protrusion is arranged on the annular array on the inner wall of the spoiler ring; the spoiler protrusion realizes the spoiler of the pressure transmission medium, reduces the stratified impact and stratified viscosity of the pressure transmission medium and affects the accuracy of pressure transmission.

[0014] The beneficial effects of the present invention are: 1. This pressure gauge uses a set of pressure transmission medium filled between the inner pressure gauge and the outer frame to replace the single isolation valve in the prior art to isolate the working liquid. Even if a local leakage of the pressure medium occurs, it can be buffered and blocked by the pressure transmission medium to reduce the impact of the pressure medium on the sensor; at the same time, the liquid pressure transmission medium has a higher buffering efficiency than filling materials such as foaming, and can be filled at any time and replaced according to the properties of the pressure medium.

[0015] 2. This pressure gauge transmits pressure through liquid and isolates the pressure medium through a simple pressure transmission piston. Compared with a directly connected pressure sensor, it can effectively reduce the aging of the pressure sensor head. Moreover, the entire pressure sensor is immersed in the pressure transmission medium, and the pressure transmission efficiency is higher. The pressure transmission medium can also provide good damping buffering for the internal gauge head through its own flow resistance, eliminating equipment damage and data inaccuracy caused by jitter.

[0016] 3. The buoyancy chamber between the pressure regulating tube and the outer floating frame is filled with buoyancy liquid. The buoyancy liquid can control the suspension arrangement of the entire internal pressure gauge. At the same time, the internal pressure of the buoyancy liquid can be controlled to adjust the internal pressure of the entire pressure transmission medium, so as to realize the pressure calibration of the entire pressure gauge under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 is a transverse cross-sectional schematic diagram of the present invention; Figure 2 yes Figure 1 A partial enlarged view of the middle A; Figure 3 It is a longitudinal cross-sectional schematic diagram of the present invention; Figure 4 is a schematic structural diagram of a first observation cover; Figure 5is a schematic diagram of the structure of the second observation cover; Figure 6 It is a structural schematic diagram of the sealing cover.

[0019] In the figure: 1. outer frame; 2. pressure connecting pipe; 3. transfer pipe; 4. pressure transmission piston housing; 5. pressure transmission piston block; 6. support spring; 7. first limit protrusion; 8. transfer piston housing; 9. second limit protrusion; 10. piston column; 11. sliding sleeve; 12. connecting sleeve; 13. filling valve; 14. pressure regulating piston housing; 15. pressure regulating piston block; 16. adjusting screw; 17. support plate; 18. elastic connecting pipe; 19. spoiler; 20. outer support frame; 21. inner support frame; 22. pressure regulating pipe; 23. first sealing protrusion ring; 24. limit ring; 25. extension opening; 26. second sealing protrusion ring; 27. connecting ring; 28 , plug-in protrusion; 29, buoyancy chamber; 30, drain valve; 31, inner floating frame; 32, pressure transfer hole; 33, inner and outer shell; 34, connecting ribs; 35, spoiler opening; 36, clamping seat; 37, elastic support rod; 38, pressure sensor; 39, conversion bridge module; 40, pressure data output module; 41, support frame; 42, inlay groove; 43, first flange bolt hole; 44, second flange bolt hole; 45, third flange bolt hole; 46, fourth flange bolt hole; 47, display module; 48, first base plate; 49, second base plate; 50, third base plate; 51, first observation cover plate; 52, second observation cover plate; 53, sealing cover plate. DETAILED DESCRIPTION

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0021] The present invention is a liquid floating shock-resistant pressure gauge, such as Figure 1 , Figure 2 and Figure 3 The present invention comprises an outer frame 1 on the outside, the side wall of the outer frame 1 is a ring-shaped closed structure, the outer frame 1 is filled with a pressure transmission medium of a damping oil or antifreeze liquid, and a third bottom plate 50 is provided at the bottom of the outer frame 1 to seal it. Figure 3 and Figure 6 A sealing cover plate 53 made of explosion-proof glass is fixed on the top of the outer frame 1 through the fourth flange bolt hole 46; a pressure connecting pipe 2 is integrally fixed on the bottom of the outer frame 1, and the pressure connecting pipe 2 is mainly used to connect the pressure medium pipeline and perform pressure detection on the liquid or gas in the pressure medium pipeline.

[0022] like Figure 1 and Figure 3The top inner wall of the pressure connecting pipe 2 is fixedly connected with a transfer pipe 3 made of polyoxymethylene material by threads, and the inner ring of the transfer pipe 3 is provided with a connection hole with a threaded structure; wherein the pressure transmission piston assembly comprises a pressure transmission piston housing 4, a support spring 6 is provided between the pressure transmission piston block 5 and the front inner wall of the pressure transmission piston housing 4, the front end of the pressure transmission piston housing 4 is fixed to the front inner wall of the connection hole by threads, and the side wall of the pressure transmission piston housing 4 is provided with a first limiting protrusion 7, and the first limiting protrusion 7 is fixedly contacted with the top of the transfer pipe 3; the inner wall at the rear end of the connection hole is also connected with a transfer piston assembly The adapter piston assembly includes an adapter piston housing 8, a side wall of which is provided with a second limiting protrusion 9, the second limiting protrusion 9 is fixedly contacted with the bottom of the adapter tube 3, a sliding sleeve 11 is fixedly provided on the inner wall of the adapter piston housing 8, a piston column 10 is slidingly and sealingly connected in the sliding sleeve 11, and the front end of the piston column 10 is fixedly connected to the pressure transmission piston block 5; a connecting sleeve 12 is also integrally embedded and fixed in the pressure connecting tube 2, the top of the connecting sleeve 12 is in sealing contact with the end of the connecting tube, and the connecting sleeve 12 is connected to the pressure detection bypass pipeline of the pressure medium pipeline through threads.

[0023] like Figure 1 A liquid filling valve 13 is also connected to the side wall of the outer frame 1 near the top. By opening the liquid filling valve 13 and the pressure regulator, the pressure transmission medium can be added to the inner part of the outer frame 1.

[0024] like Figure 1 , Figure 2 and Figure 3 An outer floating frame is arranged inside the outer frame 1, and the outer floating frame includes an inner support frame 21 and an outer support frame 20 arranged concentrically. A second bottom plate 49 is arranged at the back of the outer floating frame, and the second bottom plate 49 fixes the inner support frame 21 and the outer support frame 20 to each other. Figure 3 and Figure 5A second observation cover plate 52 is fixed at the front of the outer floating frame through the second flange bolt hole 44 and the third flange bolt hole 45 set on the inner support frame 21 and the outer support frame 20; a plurality of pressure regulating tubes 22 made of silicone material are arranged in an annular array between the inner support frame 21 and the outer support frame 20, and two groups of first sealing protrusion rings 23 are arranged at the front end of the pressure regulating tube 22, and the first sealing protrusion rings 23 are in sealing contact with the inner and outer walls of the outer support frame 20; a group of second sealing protrusion rings 26 are arranged at the rear end of the pressure regulating tube 22, and the second sealing protrusion rings 26 are in sealing contact with the outer wall of the inner support frame 21; the inner support frame 2 A plurality of connecting rings 27 are arranged in an annular array on the wall surface, and an annular plug-in protrusion 28 is arranged at the tail end of the pressure regulating tube 22, and the plug-in protrusion 28 is plugged into the connecting ring 27; a limiting ring 24 is sleeved on the outer support frame 20, and a plurality of extending openings 25 for passing the front end of the pressure regulating tube 22 are arranged in an annular array on the limiting ring 24; the limiting ring 24 is pressed against the surface of the first sealing ring located outside the outer support frame 20; an annular buoyancy chamber 29 is arranged in the area formed by the inner support frame 21, the outer support frame 20, and the outer wall of the pressure regulating tube 22, and the buoyancy chamber 29 is filled with a buoyancy medium having a density less than that of the pressure transmission medium, such as Figure 1 A pressure regulator for adjusting the internal pressure of the outer frame 1 is also arranged at the top of the outer frame 1, and the pressure regulator is fixed to the outer wall of the outer frame 1. The pressure regulator includes a pressure regulating piston assembly, and the pressure regulating piston assembly includes a pressure regulating piston shell 14. An elastic connecting tube 18 is fixed to the front end of the pressure regulating piston shell 14, and the end of the elastic connecting tube 18 is fixed to the wall of the outer support frame 20 and communicated with the buoyancy chamber 29. A linear adjustment mechanism is arranged at the end of the pressure regulating piston shell; the linear adjustment mechanism includes a support plate 17 arranged at the end of the pressure regulating piston shell 14, and an adjusting screw 16 is connected to the support plate 17 by threads, and the linear telescopic end is located at the end of the adjusting screw 16, and the end of the adjusting screw 16 is rotatably connected to the pressure regulating piston block 15; a drain valve 30 connected to the buoyancy chamber 29 is arranged at the bottom of the outer support frame 20, and the drain valve 30 can discharge air during the process of filling the buoyancy medium during manufacturing or maintenance, and discharge the buoyancy medium during maintenance.

[0025] like Figure 1 , Figure 2 and Figure 3 An inner floating frame 31 is also connected to the inner wall of the inner support frame 21 by an elastic connecting rod. The inner floating frame 31 includes an inner floating frame and an outer floating frame. The tails of the inner floating frame and the outer floating frame are provided with a first bottom plate 48. The concentric fixation of the inner floating frame and the outer floating frame is achieved by the first bottom plate 48. Figure 4A first observation cover plate 51 is fixed at the front of the floating inner frame and the floating outer frame through the first flange bolt hole 43. The first observation cover plate 51 is in sealing contact with the floating inner frame. An annular guide cavity is arranged between the floating inner frame and the floating outer frame. A plurality of connecting ribs 34 are arranged in an annular array between the floating inner frame and the floating outer frame. A spoiler opening 35 is arranged in the middle of the connecting ribs 34. A plurality of pressure transfer holes 32 connected with the guide cavity are arranged in an annular array on the outer wall of the floating outer frame. The pressure transfer hole 32 is connected with the buoyancy cavity 29.

[0026] like Figure 1 , Figure 2 and Figure 3 A plurality of clamping seats 36 are arranged in a circular array on the inner wall of the inner support frame 21, and a circular clamping groove is arranged on the side wall of the clamping seat 36, and one end of the elastic support rod 37 is wound around the clamping groove; a plurality of plug-in holes are arranged in a circular array on the outer wall of the inner floating frame 31, and the other end of the elastic support rod 37 is inserted into the plug-in hole.

[0027] An internal pressure gauge is fixed on the floating inner frame of the inner floating frame 31 through a support frame 41, and the inner gauge shell 33 and the floating inner frame are an integrated structure; the outer frame of the support frame 41 is in contact with the inner wall of the floating inner frame, and a packaging groove is provided in the middle of the support frame 41, and the conversion bridge module 39 and the battery are fixed in the packaging groove by sealant, and a plurality of inlay grooves 42 are provided in a ring array at the outer ring position of the support frame 41 corresponding to the packaging groove, and a pressure-sensitive pressure sensor 38 is fixed in the inlay groove 42, and the pressure input end of the pressure sensor 38 is fixed to the wall of the floating inner frame and connected to the guide cavity; the pressure sensor 38 is powered by a battery and inputs the strain current into the bridge module, and the pressure value converted by the bridge module is output through the pressure data output module 40, and a display module 47 is plugged into the pressure data output module 40, and the display module 47 is bonded and fixed to the first observation cover plate 51.

[0028] When the present structure is driven, the pressure is first input from the pressure medium pipeline to the sliding sleeve 11 inside the connecting sleeve 12, and the pressure is transmitted by driving the piston column 10 inside the sliding sleeve 11, and then the piston column 10 drives the pressure transmission piston block 5 with a larger cross-sectional area to achieve geometric amplification of the pressure change; then the squeezing of the pressure transmission piston block 5 will increase the internal pressure of the pressure transmission medium filled inside the entire outer frame 1, and the pressure transmission medium will be transmitted to the pressure sensor 38 through the pressure regulating tube 22 and the pressure transmission hole 32 to realize pressure detection.

[0029] The internal pressure gauge, which is the core part of the entire pressure gauge, floats in the middle of the outer frame 1 under the dual effects of the deadweight of the outer floating frame and the buoyancy of the buoyancy chamber 29 through the buoyancy medium of the buoyancy chamber 29. Through the pressure-regulating piston assembly and the pressure-regulating tube 22 made of elastic material, not only can the total volume of the buoyancy medium inside the entire buoyancy chamber 29 be fine-tuned to change the buoyancy to achieve the adjustment of the height position, but also the expansion state of the pressure-regulating tube 22 can be changed through the pressure-regulating piston assembly to adjust the internal pressure of the pressure transmission medium inside the outer frame 1, so as to achieve zero calibration of the pressure gauge under different environments.

[0030] In addition, when impacted, the outer floating frame will float relative to the outer frame 1, and the inner floating frame 31 will float relative to the outer floating frame. The flow resistance of the pressure transmission medium itself will dynamically consume the kinetic energy of the outer floating frame and the inner floating frame 31 to achieve relative stability of the internal pressure gauge. When a collision occurs, the elastic support rod can also absorb the impact well. Moreover, the multi-layer protective layer composed of the sealing cover plate 53, the first observation cover plate 51, and the second observation cover plate 52 can effectively reduce the influence of external temperature, oxidation, and impact on the accuracy of the internal pressure gauge.

[0031] At the same time, the spoiler ring 19 is also made of silicone material, which can provide spoiler for the pressure transmission medium and reduce the pressure impact of laminar flow. At the same time, silicone can absorb impact well, and the compressibility of silicone is low, which will not affect the accuracy of pressure transmission.

[0032] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A liquid-floating seismic pressure gauge, characterized in that: include: An internal pressure gauge, the internal pressure gauge comprising an internal gauge housing (33), pressure sensors (38) being arranged in an annular array on the internal gauge housing (33), a sensing end of the pressure sensor (38) being in communication with an external space of the internal gauge housing (33), a conversion bridge module (39) for connecting the pressure sensor (38) and a battery for driving the conversion bridge module (39) to work being fixed in the internal gauge housing (33), a sealing cover plate (53) being arranged at the front end of the internal gauge housing (33), a pressure data output module (40) being attached to the inner side of the sealing cover plate (53), and the pressure data output module (40) being connected to the conversion bridge module (39); An outer frame (1) is provided with a pressure drive chamber in the outer frame (1), the pressure drive chamber is filled with a pressure transmission liquid, a pressure connector is provided at the bottom of the outer frame (1), the pressure connector comprises a pressure connection pipe (2), a pressure transmission piston assembly is provided in the pressure connection pipe (2), one end of the pressure transmission piston assembly is connected to the pressure source through the pressure connection pipe (2), and the other end of the pressure transmission piston assembly is connected to the pressure drive chamber through the pressure connection pipe (2); a first observation cover plate (51) is sealed and fixed at the longitudinal end of the outer frame (1); An outer floating frame, the outer floating frame comprising an inner supporting frame (21) and an outer supporting frame (20) arranged in concentric circles with each other, an annular buoyancy chamber (29) being provided between the inner supporting frame (21) and the outer supporting frame (20), the buoyancy chamber (29) being filled with buoyancy liquid, the inner supporting frame (21) and the outer supporting frame (20) being coaxially fixed via a pressure regulating tube (22) arranged in an annular array; the pressure regulating tube (22) being made of elastic material, the two ends of the pressure regulating tube (22) being open on the surfaces of the inner supporting frame (21) and the outer supporting frame (20) and being sealedly connected to the inner supporting frame (21) and the outer supporting frame (20); a second observation cover plate (52) being sealedly fixed at a longitudinal end of the outer floating frame via the outer supporting frame (20) and the inner supporting frame (21); An inner floating frame (31), the inner floating frame (31) being elastically connected to the inner wall of the inner support frame (21) via an elastic connecting rod, an inner gauge housing (33) of the inner pressure gauge being fixedly connected to the inner floating frame (31), a plurality of pressure transmission holes (32) being arranged in an annular array on the inner floating frame (31), an input end of the pressure sensor (38) being connected to the interior of the inner support frame (21) via the pressure transmission hole (32); A pressure regulator is fixed to the outer wall of an outer frame (1), and comprises a pressure regulating piston assembly, the pressure regulating piston assembly comprises a pressure regulating piston housing (14), an elastic connecting tube (18) is fixed to the front end of the pressure regulating piston housing (14), the elastic connecting tube (18) passes through the pressure driving chamber and is connected to the buoyancy chamber (29), a linear adjustment mechanism is arranged at the end of the pressure regulating piston housing (14), and a pressure regulating piston block (15) of the pressure regulating piston assembly is fixedly connected to the linear telescopic end of the linear adjustment mechanism.

2. A liquid-floating seismic pressure gauge as claimed in claim 1, characterized in that: Two groups of first sealing protrusion rings (23) are arranged at the front end of the pressure regulating tube (22), and the first sealing protrusion rings (23) are in sealing contact with the inner and outer walls of the outer support frame (20); a group of second sealing protrusion rings (26) are arranged at the rear end of the pressure regulating tube (22), and the second sealing protrusion rings (26) are in sealing contact with the outer wall of the inner support frame (21); and a plurality of connecting rings (27) are arranged in an annular array on the wall surface of the inner support frame (21), and the tail end of the pressure regulating tube (22) is inserted into the connecting ring (27).

3. A liquid-floating seismic-resistant pressure gauge as claimed in claim 2, characterized in that: A limiting ring (24) is sleeved on the outer support frame (20), and a plurality of extending openings (25) for passing the front end of the pressure regulating tube (22) are arranged in an annular array on the limiting ring (24); the limiting ring (24) is pressed tightly against the surface of the first sealing ring located outside the outer support frame (20).

4. A liquid-floating seismic pressure gauge according to claim 1, characterized in that: A support frame (41) is provided inside the internal pressure gauge, an outer frame of the support frame (41) contacts the inner wall of the internal pressure gauge, a packaging groove is provided in the middle of the support frame (41), the conversion bridge module (39) and the battery are fixed in the packaging groove by means of a sealant, a plurality of inlay grooves (42) are provided in an annular array at the outer ring position of the support frame (41) corresponding to the packaging groove, and the end of the pressure sensor (38) is embedded in the inlay groove (42).

5. The liquid-floating seismic-resistant pressure gauge according to claim 1, characterized in that: A plurality of elastic support rods (37) are arranged in a circular array on the inner wall of the inner support frame (21), an elastic bending portion is arranged in the middle of the elastic support rods (37), and the ends of the elastic support rods (37) are connected to the outer wall of the inner floating frame (31).

6. A liquid-floating seismic-resistant pressure gauge according to claim 5, characterized in that: A plurality of clamping seats (36) are arranged in a circular array on the inner wall of the inner support frame (21), and a circular clamping groove is arranged on the side wall of the clamping seat (36), and one end of the elastic support rod (37) is wound into the clamping groove; a plurality of plug holes are arranged in a circular array on the outer wall of the inner floating frame (31), and the other end of the elastic support rod (37) is inserted into the plug hole.

7. The liquid-floating seismic-resistant pressure gauge according to claim 1, characterized in that: The inner floating frame (31) comprises an inner floating frame and an outer floating frame, an annular flow guide cavity is arranged between the inner floating frame and the outer floating frame, a plurality of connecting ribs (34) are arranged in an annular array between the inner floating frame and the outer floating frame, and a flow spoiler opening (35) is arranged in the middle of the connecting ribs (34); wherein the pressure transmission hole (32) is arranged on the outer floating frame, and the pressure detection tube is connected to the pressure transmission hole (32) through the flow guide cavity.

8. The liquid-floating seismic-resistant pressure gauge according to claim 1, characterized in that: The linear adjustment mechanism comprises a support plate (17) arranged at the end of a pressure regulating piston housing (14); an adjustment screw (16) is threadedly connected to the support plate (17); a linear telescopic end is located at the end of the adjustment screw (16); and the end of the adjustment screw (16) is rotatably connected to the pressure regulating piston block (15).

9. The liquid-floating seismic-resistant pressure gauge according to claim 1, characterized in that: A transfer tube (3) made of polyoxymethylene is fixedly connected to the inner wall of the top of the pressure connecting tube (2) by means of threads, and a connection hole with a threaded structure is provided on the inner ring of the transfer tube (3); wherein the pressure transmission piston assembly comprises a pressure transmission piston housing (4), a support spring (6) is provided between the pressure transmission piston block (5) and the front inner wall of the pressure transmission piston housing (4), the front end of the pressure transmission piston housing (4) is fixed to the front inner wall of the connection hole by means of threads, and a first limiting protrusion (7) is provided on the side wall of the pressure transmission piston housing (4), and the first limiting protrusion (7) and the transfer tube (3) are connected to each other. The top of the transfer tube (3) is fixedly contacted with the transfer piston assembly; the inner wall of the rear end of the connection hole is also connected, the transfer piston assembly comprises a transfer piston housing (8), the side wall of the transfer piston housing (8) is provided with a second limiting protrusion (9), the second limiting protrusion (9) is fixedly contacted with the bottom of the transfer tube (3), a sliding sleeve (11) is fixedly provided on the inner wall of the transfer piston housing (8), a piston column (10) is slidingly and sealingly connected in the sliding sleeve (11), and the front end of the piston column (10) is fixedly connected to the pressure transmission piston block (5); the end of the transfer tube (3) is connected to the pressure source through the pressure connection pipe (2).

10. A liquid-floating seismic-resistant pressure gauge as claimed in claim 1, characterized in that: An annular spoiler ring (19) extending towards the centre of the pressure-driven chamber is arranged on the inner wall of the pressure-driven chamber, and a spoiler protrusion is arranged in an annular array on the inner wall of the spoiler ring (19).

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