A breather valve for a liquid-immersed instrument

Abstract

The present invention discloses a breathing valve for a liquid immersion type instrument, which includes a liquid immersion type instrument and a valve body installed on the liquid immersion type instrument; a lifting assembly is arranged at the lower part of the valve body; the lifting assembly includes a movable seat slidably connected to the lower part of the valve body, an outer oil barrel fixedly connected to the movable seat, and an elastic ring fixedly connected to the upper end of the outer oil barrel; a plurality of exhaust holes for gas to enter and exit are formed on the movable seat; a plurality of drill bit assemblies are arranged in the valve body, and the drill bit assemblies include drill bits slidably connected in the valve body; a driving gear ring is rotatably connected in the valve body; a driving piston is hermetically slidably connected in the valve body; the present invention can dry and balance the gas in the instrument and can automatically solve the blockage problem.

Description

Technical Field

[0001] The present invention belongs to the technical field of pressure devices, and particularly relates to a breather valve for a liquid immersion type instrument. Background Art

[0002] Chinese patent document with the document number CN211504499U discloses a pressure gauge, which includes a pressure indicating panel, a fluid input part that can communicate with the fluid, a pressure conversion mechanism that can be changed due to different fluid pressures, and a pressure indicating element that is linked with the pressure conversion mechanism and used to display the pressure on the pressure indicating panel. The fluid input part includes a connector head, an internal thread is provided on the inner side of the bottom of the connector head, a fitting joint is provided in the connector head, the upper end of the fitting joint is matched with the internal thread, and a spiral damping pipe is formed between the pipes of the connector head and the fitting joint. A buffer cavity is opened on the fitting joint. A straight pipe cavity is provided in the fluid input part, the straight pipe cavity is communicated with the pipe, and a sealing slider is provided in the straight pipe cavity. A filling liquid is filled in the straight pipe cavity at the upper end of the sealing slider. By adopting a double shock absorption method, the overall shock resistance ability is improved.

[0003] During the use of the above patent, the change of the external temperature will cause the change of the pressure inside the pressure gauge, affecting the normal use of the pressure gauge. Seriously, it will cause damage to the pressure gauge. Direct connection with the outside will also cause the air with moisture in the outside to enter, affecting the service life of the pressure gauge.

[0004] Chinese patent document with the document number CN207637597U discloses a transformer breather and a transformer system, which is characterized by including a protection column, an upper flange, an oil cup flange, a glass cover, an oil cup, and a refrigeration box. The oil cup is connected with the glass cover through the oil cup flange. A sealing gasket and an exhaust hole are provided on the oil cup flange. The glass cover and the oil cup are both fixed in the protection column. Compared with the adsorption dehumidification method of a conventional breather, a condensation dehumidification method is added, improving the dehumidification efficiency and prolonging the service life of the silica gel in the breather at the same time.

[0005] During the use of the above patent, the breather is often accompanied by a blockage phenomenon during use, and the device itself has no function to solve the blockage and requires manual maintenance. Summary of the Invention

[0006] The technical problem to be solved by the present invention is: aiming at the deficiencies existing in the prior art, to provide an anti-blocking breather valve for a liquid immersion type instrument that can dry and balance the gas inside the instrument and can automatically solve the blockage problem.

[0007] To achieve the object of the present invention, the following technical solutions are adopted: A breathing valve for a liquid immersion type instrument, comprising a liquid immersion type instrument and a valve body filled with a desiccant, which is installed on the liquid immersion type instrument and communicated with a solution chamber in the liquid immersion type instrument.

[0008] A lifting assembly is arranged at the lower part of the valve body; the lifting assembly includes a movable seat that is hermetically and slidably connected to the lower part of the valve body in the vertical direction, an outer oil barrel fixedly connected to the movable seat, and an elastic ring fixedly connected to the upper end of the outer oil barrel; the lower end of the valve body is formed with a lower end opening, and the lower end opening is located inside the outer oil barrel. The outer oil barrel is filled with sealing oil that submerges the lower end opening of the valve body; there is an exhaust gap for gas to pass between the elastic ring and the valve body.

[0009] A plurality of exhaust holes for gas to enter and exit are formed on the movable seat; a plurality of drill bit assemblies are arranged in the valve body. The drill bit assemblies include drill bits that are slidably connected to the valve body in the vertical direction and can penetrate the exhaust holes; a driving gear ring for driving the movable seat to slide is rotatably connected in the valve body; the driving gear ring is in transmission connection with each drill bit; a driving piston that is hermetically and slidably connected to the valve body and is in transmission connection with the driving gear ring is arranged in the valve body; an increase or decrease in the pressure inside the valve body drives the driving piston to slide.

[0010] When the exhaust gap is blocked, the pressure inside the valve body changes, the driving piston slides to make the driving gear ring rotate, and the movable seat moves downward relative to the valve body so that the exhaust gap is no longer blocked.

[0011] When the exhaust hole is blocked, the pressure inside the valve body changes, the driving piston slides to make the driving gear ring rotate, and the drill bit slides downward to dredge the exhaust hole.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention is a breathing valve for a liquid immersion type instrument, which can balance the pressure change caused by temperature change in the instrument and dry the gas. Since the breathing valve is often blocked for various reasons during use, resulting in the inability to balance the pressure, the driving piston in the present invention can automatically use the unbalanced pressure to solve the blockage problem, without manual operation, nor additional detection elements, power sources, and corresponding control circuits.

[0013] Furthermore: On the one hand, the present invention is provided with a driving gear ring driven by a driving piston. If the blockage problem is caused by the common adhesion of the elastic ring, the driving gear ring drives the movable seat to separate from the main housing, thereby solving the blockage and increasing the exhaust gap. If the blockage problem is caused by the relatively common closure of the exhaust hole, the driving gear ring drives each drill bit to rotate and move downward to dredge the exhaust hole.

[0014] On the other hand, the present invention is provided with a safety valve that can be driven by a driving piston to open. If the blockage problem is not caused by the bonding of the exhaust gap or the closure of the exhaust hole, the driving piston drives the safety valve to open, so that the drying cylinder is directly communicated with the outside world to balance the internal pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the working state diagram of the present invention.

[0016] Figure 2 is the schematic cross-sectional structure diagram when the present invention works normally.

[0017] Figure 3 is the schematic cross-sectional structure diagram when the present invention solves the exhaust gap blockage.

[0018] Figure 4 is the schematic cross-sectional structure diagram when the present invention dredges the exhaust hole.

[0019] Figure 5 is the schematic cross-sectional structure diagram when the present invention has overpressure protection.

[0020] Figure 6 is the exploded structure diagram of the energy storage component of the present invention.

[0021] 1. Valve body; 11. Drying cylinder; 111. Upper ventilation pipe; 112. Lower ventilation pipe; 12. Inlet pipe; 13. Switching cylinder; 14. Inner oil pipe; 15. Driving air pipe; 151. Balance air hole; 152. Anti-rotation rib; 16. Connecting air pipe; 2. Lifting assembly; 21. Movable seat; 211. Exhaust hole; 212. Movable sliding column; 213. Driven thread; 214. Optical axis; 215. Movable seat spring; 22. Elastic ring; 23. Lifting gear; 24. Outer oil barrel; 31. Drill bit; 311. Drill bit spiral groove; 312. Synchronous shaft; 32. Driven plug; 33. Rotating rod; 34. Switching frame; 341. First switching inclined plane; 342. Second switching inclined plane; 343. Switching groove; 35. Drill bit gear ring; 36. Drill bit gear; 37. Drill bit spring; 38. Switching plug; 381. Switching sliding column; 41. Driving piston; 411. Driving sliding column; 412. Anti-rotation groove; 42. Driving pipe; 421. Upper spiral chute; 422. Driving gear; 423. Lower spiral chute; 43. Piston spring; 44. Safety valve; 441. Safety valve spring; 442. Push plate; 45. Transmission gear; 5. Energy storage assembly; 51. Lower turntable; 511. Lower gear ring; 52. Upper turntable; 521. Upper gear; 522. Slide bar chute; 523. Clamping groove; 53. Torsion spring; 54. Slide bar; 541. Filling head; 542. Compression spring; 6. Driving gear ring; 61. Inner ratchet; 62. Driving column; 63. Driving inclined plane; 7. Pawl; 71. Pawl torsion spring; 72. Pawl lever; 8. Anti-rotation rod; 81. Driven lever; 82. Anti-rotation head; 83. Dialing inclined plane. Detailed implementation manner

[0022] According to Figures 1 to 6 As shown in the figure, a breathing valve for a liquid immersion type instrument in this embodiment includes a liquid immersion type instrument and a valve body 1 filled with a desiccant and installed on the liquid immersion type instrument and communicated with a solution chamber in the liquid immersion type instrument.

[0023] The lower part of the valve body 1 is provided with a lifting assembly 2; the lifting assembly 2 includes a movable seat 21 that is hermetically slidably connected to the lower part of the valve body 1 in the up and down direction, an outer oil barrel 24 fixedly connected to the movable seat 21, and an elastic ring 22 fixedly connected to the upper end of the outer oil barrel 24.

[0024] The lower end of the valve body 1 is formed with a lower end opening, and the lower end opening is located inside the outer oil barrel 24. The outer oil barrel 24 is filled with a sealing oil that submerges the lower end opening of the valve body 1; there is an exhaust gap for gas to pass between the elastic ring 22 and the valve body 1.

[0025] A plurality of exhaust holes 211 for gas to enter and exit are formed on the movable seat 21; a plurality of drill bit assemblies are arranged in the valve body 1, and each drill bit assembly includes a drill bit 31 that is slidably connected in the valve body 1 in the up and down direction and can penetrate the exhaust holes 211.

[0026] A driving gear ring 6 for driving the sliding of the movable seat 21 is rotatably connected in the valve body 1; the driving gear ring 6 is in transmission connection with each drill bit 31.

[0027] A driving piston 41 that is in transmission connection with the driving gear ring 6 is hermetically slidably connected in the valve body 1; when the gas in the valve body 1 cannot interact with the outside world, the driving piston 41 is driven to slide by the increase or decrease of the pressure in the valve body 1.

[0028] When the exhaust gap is blocked, the internal pressure of the valve body 1 changes, the driving piston 41 slides to make the driving gear ring 6 rotate, and the movable seat 21 moves downward relative to the valve body 1 so that the exhaust gap is no longer blocked; the elastic ring 22 is no longer bonded to the lower end of the valve body 1.

[0029] When the exhaust holes 211 are blocked, the internal pressure of the valve body 1 changes, the driving piston 41 slides to make the driving gear ring 6 rotate, and the drill bit 31 slides downward to dredge the exhaust holes 211.

[0030] During the normal use of the liquid immersion type instrument, the change of the external temperature will cause the change of the liquid volume in the instrument, and the gas pressure in the solution chamber changes synchronously, resulting in the interaction between the solution chamber and the outside gas through the breathing valve. The moisture of the interacting gas is absorbed by the desiccant when passing through the breathing valve, and the dry gas enters and exits the instrument to balance the internal pressure of the instrument.

[0031] During the use of the breathing valve, blockage phenomena often occur, such as the bonding of the exhaust gap, or the blockage of the exhaust holes 211 by foreign objects, icing due to temperature difference, etc., resulting in the inability of the breathing valve to be used normally. When the pressure change is too large, the accuracy of the instrument decreases or even damages the instrument, and manual maintenance or maintenance through circuit control is required.

[0032] A drill bit gear ring 35 that is in transmission connection with each drill bit 31 is rotatably connected in the valve body 1.

[0033] A power storage assembly 5 that is in transmission connection with the drill bit gear ring 35 is arranged inside the valve body 1.

[0034] The force storage assembly 5 includes an upper turntable 52 rotatably connected to the inside of the valve body 1 and transmission connected to the drill gear ring 35, a lower turntable 51 rotatably connected to the inside of the valve body 1 and located below the upper turntable 52 and transmission connected to the drive gear ring 6, and a coil spring 53 arranged between the upper turntable 52 and the lower turntable 51.

[0035] A stop rod 8 is slidably connected to the interior of the valve body 1 in the up-and-down direction and is capable of preventing the upper turntable 52 from rotating.

[0036] An upper gear 521 which is transmission-connected to the drill gear ring 35 is fixedly connected to the upper end of the upper turntable 52 , and a lower gear ring 511 which is transmission-connected to the drive gear ring 6 is formed on the outer wall of the lower turntable 51 .

[0037] When the anti-rotation rod 8 is located at the lower limit position, the upper turntable 52 cannot rotate, and the rotation of the driving gear ring 6 causes the lower turntable 51 to rotate relative to the upper turntable 52, the coil spring 53 twists and stores force, the movable seat 21 moves, and the drill bit 31 does not move.

[0038] When the anti-rotation rod 8 is located at the upper limit position, the upper turntable 52 can rotate, and the upper turntable 52 drives the drill gear ring 35 to rotate under the elastic force of the coil spring 53, and each drill bit 31 moves.

[0039] The upper end of the upper turntable 52 is formed with a clamping groove 523 that can be clamped with the anti-rotation rod 8; the upper end of the driving gear ring 6 is fixedly connected to a driving column 62, and the upper end of the driving column 62 is formed with an inclined driving inclined surface 63 that can push the anti-rotation rod 8 upward.

[0040] The upper end of the anti-rotation rod 8 is formed with a driven lever 81 which can be pushed upward by the driving inclined surface 63 .

[0041] An inner ratchet 61 is formed on the inner wall of the driving gear ring 6, and a pawl 7 is rotatably connected inside the valve body 1 and can prevent the inner ratchet 61 from rotating in the opposite direction; the lower part of the anti-rotation rod 8 is formed with an inclined driving slope 83 that can push the pawl 7 to rotate.

[0042] The outer wall of the pawl 7 is formed with a pawl lever 72 which can be pushed by the shifting inclined surface 83 .

[0043] When the driving inclined surface 63 is not in contact with the stop rod 8, the stop rod 8 is located at the lower limit position, the stop rod 8 is engaged with the engaging groove 523, the rotation of the driving gear ring 6 drives the movable seat 21 to slide, the pawl 7 abuts against the inner ratchet 61 and prevents the inner ratchet 61 from rotating in the opposite direction, thereby preventing the enlarged exhaust gap from closing again.

[0044] When the driving inclined surface 63 contacts the anti-rotation rod 8, the rotation of the driving gear ring 6 drives the anti-rotation rod 8 to move to the upper limit position. The anti-rotation rod 8 is not engaged with the clamping groove 523, and the pawl 7 rotates to not abut against the internal ratchet wheel 61. The driving gear ring 6 can rotate in the reverse direction after the exhaust hole 211 is unblocked.

[0045] The energy storage assembly 5 further includes a slide bar 54 that is slidably connected to the upper end of the upper turntable 52 and can be inserted into the clamping groove 523. The slide bar 54 can prevent the anti-rotation rod 8 from being engaged with the clamping groove 523. The centrifugal force generated when the upper turntable 52 rotates can drive the slide bar 54 to slide.

[0046] A compression spring 542 is arranged between the slide bar 54 and the upper turntable 52 to drive the slide bar 54 to move away from the clamping groove 523.

[0047] A pawl torsion spring 71 for driving the pawl 7 to rotate in the reverse direction is arranged between the pawl 7 and the valve body 1.

[0048] A slide bar chute 522 that is slidably connected to the slide bar 54 is formed at the upper end of the upper turntable 52.

[0049] An anti-rotation head 82 that can be engaged with the clamping groove 523 is formed at the upper end of the anti-rotation rod 8. A filling head 541 that can be inserted into the clamping groove 523 is formed at one end of the slide bar 54 close to the clamping groove 523. When the filling head 541 is inserted into the clamping groove 523, the upper opening of the clamping groove 523 is closed, and the filling head 541 always abuts against the upper end of the upper turntable 52, so that the anti-rotation rod 8 is always located at the upper limit position.

[0050] When the centrifugal force generated by the rotation of the upper turntable 52 is greater than the elastic force of the compression spring 542, the slide bar 54 moves to be inserted into the clamping groove 523, the upper opening of the clamping groove 523 is sealed, and the anti-rotation rod 8 cannot be engaged with the clamping groove 523.

[0051] When the centrifugal force generated by the rotation of the upper turntable 52 is less than the elastic force of the compression spring 542, the slide bar 54 moves to not be inserted into the clamping groove 523, and the anti-rotation rod 8 moves to be engaged with the clamping groove 523 under the action of its own gravity, and each drill bit 31 completes penetrating the exhaust hole 211.

[0052] A spiral drill bit groove 311 is formed on the outer wall of the drill bit 31.

[0053] The drill bit assembly further includes a driven insertion rod 32 that is slidably connected within the valve body 1 and can be slidably connected to the spiral groove 311 of the drill bit, a drill bit gear 36 that is rotatably connected within the valve body 1 and is in transmission connection with the drill bit gear ring 35, and a drill bit spring 37 that is disposed between the drill bit 31 and the drill bit gear 36 and is used to push the drill bit 31 upward.

[0054] The drill bit gear 36 is circumferentially relatively fixed and axially slidably connected to the drill bit 31.

[0055] A synchronizing hole with a non-circular cross-section is formed in the center of the drill bit gear 36, and a synchronizing shaft 312 with the same cross-section as the synchronizing hole is formed on the outer wall of the drill bit 31.

[0056] When the driven insertion rod 32 is at the limit position close to the drill bit 31, the driven insertion rod 32 is slidably connected to the spiral groove 311 of the drill bit. The rotation of the drill bit gear 36 causes the driven insertion rod 32 to move within the spiral groove 311 of the drill bit, and the drill bit 31 rotates and moves downward to dredge the exhaust hole 211, and the drill bit spring 37 contracts and stores energy.

[0057] When the driven insertion rod 32 is at the limit position far from the drill bit 31, the driven insertion rod 32 moves out of the spiral groove 311 of the drill bit, and the drill bit 31 moves upward to the upper limit position under the elastic force of the drill bit spring 37.

[0058] The drill bit assembly further includes a switching insertion rod 38 that is slidably connected within the valve body 1 and is in transmission connection with the driven insertion rod 32, a switching frame 34 that is fixedly connected to the upper part of the drill bit 31 and is used to drive the switching insertion rod 38 to slide reciprocally, and a rotating rod 33 that is rotatably connected within the valve body 1.

[0059] A switching groove 343 that is slidably connected to the switching insertion rod 38 is formed on the switching frame 34. A first switching inclined surface 341 for pushing the switching insertion rod 38 in the direction away from the drill bit 31 is formed at the lower end of the switching groove 343, and a second switching inclined surface 342 for pushing the switching insertion rod 38 in the direction close to the drill bit 31 is formed at the upper end of the switching groove 343.

[0060] The rotating shaft of the rotating rod 33 is located in the middle. One end of the rotating rod 33 is slidably connected to the driven insertion rod 32, and the other end of the rotating rod 33 is slidably connected to the switching insertion rod 38.

[0061] A switching sliding column 381 that is rotatably connected to the rotating rod 33 is formed on the switching insertion rod 38, and the switching sliding column 381 is slidably connected to the switching groove 343.

[0062] When the drill bit 31 moves to the lower limit position, the second switching slope 342 pushes the switching rod 38 to move close to the limit position of the drill bit 31, and the switching rod 38 drives the driven rod 32 to move away from the limit position of the drill bit 31, and the driven rod 32 moves out of the drill bit spiral groove 311.

[0063] When the drill bit 31 moves to the upper limit position, the first switching slope 341 pushes the switching rod 38 to move away from the limit position of the drill bit 31, and the switching rod 38 drives the driven rod 32 to move close to the limit position of the drill bit 31, and the driven rod 32 is slidably connected to the drill bit spiral groove 311.

[0064] The valve body 1 includes a drying cylinder 11 for installing the desiccant, and a driving air pipe 15 fixedly connected to the outer wall of the drying cylinder 11 ; the upper part of the driving air pipe 15 is communicated with the inner bottom of the drying cylinder 11 .

[0065] The driving piston 41 is sealingly and slidably connected to the driving air pipe 15 .

[0066] A driving pipe 42 which is transmission-connected to the driving gear ring 6 is rotatably connected in the driving air pipe 15 .

[0067] The outer wall of the driving piston 41 is formed with a driving slide post 411, the upper inner wall of the driving tube 42 is formed with a spiral upper spiral groove 421 that can be slidably connected to the driving slide post 411, and the lower end of the upper spiral groove 421 is formed with a spiral lower spiral groove 423 that can be slidably connected to the driving slide post 411.

[0068] The spiral direction of the upper spiral groove 421 is opposite to the spiral direction of the lower spiral groove 423 .

[0069] Piston springs 43 are disposed between both ends of the driving piston 41 and the inner wall of the driving air pipe 15 .

[0070] A transmission gear 45 which is transmission-connected to the driving gear ring 6 is rotatably connected in the valve body 1 , and a driving gear 422 which is transmission-connected to the transmission gear 45 is fixedly connected to the lower end of the driving tube 42 .

[0071] When the exhaust gap or the exhaust hole 211 is blocked and the pressure in the drying cylinder 11 decreases, the driving piston 41 slides upward, the driving slide column 411 moves into the upper spiral slide groove 421, the driving tube 42 rotates forward, and the driving gear ring 6 rotates forward.

[0072] When the exhaust gap or the exhaust hole 211 is blocked and the pressure in the drying cylinder 11 increases, the driving piston 41 slides downward, the driving sliding column 411 moves into the lower spiral chute 423, the driving tube 42 rotates forward, and the driving gear ring 6 rotates forward, so that no matter whether the pressure increases or decreases, the movement of the driving piston 41 can always drive only the driving gear ring 6 to rotate forward.

[0073] The valve body 1 further includes an air inlet pipe 12 fixedly connected to the inner top of the drying cylinder 11 and internally communicating with each protected instrument, a switching cylinder 13 fixedly connected to the lower end inside the drying cylinder 11 for installing the lifting assembly 2 and the drill bit assembly, and an inner oil pipe 14 fixedly connected to the lower end of the drying cylinder 11 and internally communicating with the drying cylinder 11; the lower end of the inner oil pipe 14 is immersed below the sealed oil level in the outer oil barrel 24.

[0074] A lower ventilation pipe 112 is formed at the inner bottom of the drying cylinder 11, an upper ventilation pipe 111 is formed at the inner top of the driving air pipe 15, and a communicating air pipe 16 fixedly connected to the outer wall of the drying cylinder 11 and having one end communicating with the lower ventilation pipe 112 and the other end communicating with the upper ventilation pipe 111.

[0075] A balance air hole 151 is formed at the inner top of the driving air pipe 15, a safety valve 44 capable of closing the balance air hole 151 is hermetically slidably connected to the inner top of the driving air pipe 15, a push plate 442 located inside the driving air pipe 15 and capable of being pushed by the driving piston 41 is formed at the lower end of the safety valve 44, and a safety valve spring 441 for pushing the safety valve 44 downward is arranged between the push plate 442 and the inner wall of the driving air pipe 15.

[0076] When the driving piston 41 moves downward to the lower limit position, the pressure continues to increase, causing the safety valve 44 to move to the upper limit position, the balance air hole 151 is no longer closed, and the gas in the driving air pipe 15 is discharged to the outside through the balance air hole 151, so that the pressure in the valve body 1 is restored.

[0077] When the driving piston 41 moves upward to the upper limit position, the driving piston 41 pushes the safety valve 44 to move to the upper limit position, the balance air hole 151 is no longer closed, and the outside gas enters the driving air pipe 15 through the balance air hole 151 and then enters the drying cylinder 11. The drying cylinder 11 removes the moisture of the entering gas, so that the pressure in the valve body 1 is restored, so that no matter whether the pressure increases or decreases, when the driving piston 41 moves to the limit, the balance air hole 151 can always be not closed.

[0078] A plurality of movable sliding columns 212 are fixedly connected to the upper end of the movable seat 21, and a lifting gear 23 drivingly connected to the driving gear ring 6 is rotatably connected to each of the movable sliding columns 212.

[0079] A section of spiral driven thread 213 is formed on the outer wall of the movable sliding column 212, and the portion without the driven thread 213 is a smooth shaft 214.

[0080] Internal threads capable of being threadedly connected to the driven thread 213 are formed on the inner wall of the lifting gear 23; the internal threads can be aligned with the smooth shaft 214.

[0081] A movable seat spring 215 is provided between the lifting gear 23 and the movable seat 21.

[0082] When the internal threads are connected to the driven thread 213, the rotation of the driving gear ring 6 drives the movable seat 21 to slide up and down.

[0083] When the internal threads are aligned with the smooth shaft 214, the movable seat spring 215 contracts and stores energy, so that the internal threads remain in contact with the driven thread 213 without transmission.

[0084] Anti-rotation rib strips 152 arranged in the up and down direction are formed on the inner wall of the driving air pipe 15, and anti-rotation grooves 412 hermetically and slidably connected to the anti-rotation rib strips 152 are formed on the outer wall of the driving piston 41.

[0085] In the initial state, the driving sliding column 411 is located at the connection of the upper spiral chute 421 and the lower spiral chute 423, the anti-rotation rod 8 is located at the lower limit position, the anti-rotation head 82 is clamped with the clamping groove 523, the ratchet pawl 7 abuts against the internal ratchet wheel 61, each drill bit 31 is located at the upper limit position, and the driven insertion rod 32 is located in the drill bit spiral groove 311.

[0086] During the normal use of the liquid immersion type instrument, the change of the external temperature will cause the change of the liquid volume in the instrument, that is, the change of the gas volume in the solution chamber. When the solution chamber is directly communicated with the external atmosphere, the water vapor mixed in the air enters the instrument, which is likely to pollute the internal solution, and even more affect the sensors or mechanical structures inside the instrument. Therefore, the solution chamber of the liquid immersion type instrument cannot be directly communicated with the external atmosphere, and a breathing valve needs to be used. The solution chamber interacts with the external gas through the breathing valve, and the moisture in the gas is absorbed by the desiccant when passing through the breathing valve, and the dry gas enters and exits the instrument to balance the internal pressure of the instrument.

[0087] Under normal circumstances, when the gas volume in the instrument changes, the gas in the instrument interacts with the gas in the drying cylinder 11 through the air inlet pipe 12, so that the gas pressure in the drying cylinder 11 changes synchronously.

[0088] If the temperature rises, the volume of the gas inside the instrument increases, the pressure inside the drying cylinder 11 increases, and the sealed oil located inside the inner oil pipe 14 is pushed by the gas to move outward into the outer oil barrel 24. When the liquid level of the sealed oil in the inner oil pipe 14 is flush with the lower opening, the gas inside the drying cylinder 11 is discharged from the lower opening, then passes through the exhaust gap between the elastic ring 22 and the drying cylinder 11, and finally is discharged from each exhaust hole 211, thereby restoring the pressure inside the instrument.

[0089] If the temperature drops, the volume of the gas inside the instrument decreases, the pressure inside the drying cylinder 11 decreases, and the sealed oil located inside the outer oil barrel 24 is drawn into the inner oil pipe 14 due to the pressure difference. When the liquid level of the sealed oil in the outer oil barrel 24 is flush with the lower opening of the inner oil pipe 14, the outside gas is drawn into the drying cylinder 11 through the exhaust hole 211, the exhaust gap, and the lower opening. The desiccant inside the drying cylinder 11 absorbs the moisture in the gas, making the gas dry. The dry gas is supplemented into the instrument through the intake pipe 12, thereby restoring the pressure inside the instrument.

[0090] During the use of the breathing valve, blockage phenomena often occur, such as the bonding of the elastic ring 22 to the lower end face of the drying cylinder 11, or the blockage of the exhaust hole 211 by foreign objects, icing due to temperature differences, etc., resulting in the inability of the breathing valve to be used normally. The pressure change inside the breathing valve cannot be balanced and continuously changed. When the pressure change is too large, the accuracy of the instrument decreases or even damages the instrument, and manual maintenance or maintenance through circuit control is required.

[0091] When the internal pressure cannot be restored, the gas inside the drying cylinder 11 undergoes gas interaction with the cavity above the driving piston 41 inside the driving air pipe 15 through the lower ventilation pipe 112, the connecting ventilation pipe 16, and the upper ventilation pipe 111, making the pressure inside the driving air pipe 15 change synchronously with the pressure inside the drying cylinder 11. Thereby, the driving piston 41 slides under the action of the pressure difference on both the upper and lower sides, and the piston springs 43 on both the upper and lower sides of the driving piston 41 contract and store energy.

[0092] Since the anti-rotation groove 412 and the anti-rotation rib 152 cooperate to make the driving piston 41 only able to slide relative to the driving air pipe 15 but not rotate relative to it, the movement of the driving piston 41 drives the driving slide column 411 to move, making the driving slide column 411 move in the spiral chute inside the driving pipe 42; if the pressure inside the drying cylinder 11 increases, the driving piston 41 slides downward, the driving slide column 411 moves into the lower spiral chute 423 and drives the driving pipe 42 to rotate forward; if the pressure inside the drying cylinder 11 decreases, the driving piston 41 slides upward, the driving slide column 411 moves into the upper spiral chute 421 and drives the driving pipe 42 to rotate forward. Thereby, regardless of whether the pressure inside the drying cylinder 11 increases or decreases, the driving piston 41 always drives the driving pipe 42 to rotate forward, and the rotation of the driving pipe 42 drives the transmission gear 45 to rotate, making the driving gear ring 6 rotate forward.

[0093] If the blockage is caused by the adhesion of the elastic ring 22 to the lower end of the drying cylinder 11, the rotation of the driving gear ring 6 drives the lifting gear 23 to rotate. Since the internal thread in the lifting gear 23 is connected to the driven thread 213 on the movable seat at this time, the rotation of the lifting gear 23 drives the movable sliding column 212 to move downward, and the movement of the movable sliding column 212 drives the movable seat 21 to move downward. The movement of the movable seat 21 drives the outer oil barrel 24 and the elastic ring 22 to move downward synchronously, so that the elastic ring 22 is separated from the lower end of the drying cylinder 11, so that the exhaust gap is increased. At this time, the elastic ring 22 is separated from the lower end of the drying cylinder 11 and is no longer blocked. At this time, the pawl 7 and the inner ratchet 61 are abutted to keep the driving gear ring 6 in the current position.

[0094] The drying cylinder 11 is connected to the outside world, and the outside air interacts with the air in the drying cylinder 11 and moisture is absorbed by the desiccant. The gas interaction restores the pressure in the drying cylinder 11.

[0095] If the blockage is caused by the closure of the exhaust hole 211, the rotation of the driving gear ring 6 drives the lower gear ring 511 to rotate, so that the lower turntable 51 rotates. At this time, the anti-rotation head 82 of the anti-rotation rod 8 is engaged with the engaging groove 523 on the upper turntable 52, and the upper turntable 52 cannot rotate. Therefore, the lower turntable 51 rotates relative to the upper turntable 52 and drives the coil spring 53 to twist and accumulate force. At this time, the inner ratchet 61 on the driving gear ring 6 is against the pawl 7, and the pawl 7 prevents the inner ratchet 61 from rotating in the opposite direction. When the driving gear ring 6 rotates until the driving inclined surface 63 is against the driven lever 81 on the anti-rotation rod 8, the driving gear ring 6 continues to rotate to make The driving inclined surface 63 squeezes and pushes the driven lever 81 upward, and the anti-rotation rod 8 moves upward. The movement of the anti-rotation rod 8 drives the moving inclined surface 83 to move, so that the moving inclined surface 83 squeezes and pushes the pawl lever 72; thereby the pawl 7 rotates; when the anti-rotation rod 8 moves to the upper limit position, the pawl 7 rotates to a position where it does not abut against the inner ratchet 61. At this time, the driving gear ring 6 can rotate in the reverse direction. At the same time, the anti-rotation head 82 moves out from the upper end opening of the clamping groove 523, and the upper turntable 52 is no longer fixed; because the pressure in the drying cylinder 11 is not balanced at this time, the driving piston 41 remains in the corresponding position, and the driving gear ring 6 does not rotate in the reverse direction.

[0096] Since the lower gear ring 511 on the lower turntable 51 is latched with the driving gear ring 6, the upper turntable 52 rotates relative to the lower turntable 51 under the elastic force of the coil spring 53. The rotation of the upper turntable 52 drives the upper gear 521 to rotate, causing the drill gear ring 35 to rotate. The rotation of the drill gear ring 35 drives the drill gear 36 to rotate, and the rotation of the drill gear 36 drives the drill 31 to rotate. Since the driven insertion rod 32 is slidably connected to the drill spiral groove 311, the drill 31 slides downward while rotating. The downward movement of the drill 31 drives the switching frame 34 to move downward synchronously, and the drill spring 37 contracts and stores energy. Since the driven insertion rod 32 is located in the drill spiral groove 311, the drill 31 will not move upward under the elastic force of the drill spring 37. When the drill 31 moves to the lower limit position, the drill 31 unblocks the exhaust hole 211 and is no longer blocked. The inside of the drying cylinder 11 is connected to the outside. The outside gas interacts with the gas inside the drying cylinder 11 and the moisture is absorbed by the desiccant. The gas interaction restores the pressure inside the drying cylinder 11, and the driving piston 41 slides under the elastic force of the piston spring 43. The sliding of the driving piston 41 drives the driving gear ring 6 to rotate in the reverse direction.

[0097] Meanwhile, the drill 31 drives the switching frame 34 to move to the lower limit position. The second switching slope 342 located at the upper end of the switching groove 343 pushes the switching sliding column 381, causing the switching insertion rod 38 to move to the limit position close to the drill 31. The movement of the switching insertion rod 38 drives the rotating rod 33 to rotate, causing the driven insertion rod 32 to move to the limit position away from the drill 31. The driven insertion rod 32 moves out of the drill spiral groove 311, and the drill 31 moves upward to the upper limit position under the elastic force of the drill spring 37. When moving to the upper limit position, the first switching slope 341 on the switching frame 34 pushes the switching insertion rod 38 to move to the limit position away from the drill 31, causing the driven insertion rod 32 to move into the drill spiral groove 311 again.

[0098] When the upper turntable 52 rotates, the sliding rod 54 on the upper turntable 52 moves to the filling head 541 and plugs into the engaging groove 523 under the action of centrifugal force, and the compression spring 542 contracts to store force. At this time, the upper end opening of the engaging groove 523 is closed, and the anti-rotation head 82 on the anti-rotation rod 8 always abuts against the upper end surface of the upper turntable 52, and the anti-rotation rod 8 remains in the upper limit position, so that even if the driving inclined surface 63 on the driving gear ring 6 no longer abuts against the driven lever 81, the anti-rotation rod 8 will not fall, and the pawl 7 continues to remain in a position that does not abut against the inner ratchet 61, allowing the driving gear ring 6 to rotate in the opposite direction to the initial position; as the elastic force of the coil spring 53 is released , the rotation speed of the upper turntable 52 decreases synchronously. When the centrifugal force acting on the slide bar 54 is less than the elastic force of the compression spring 542, the compression spring 542 pushes the slide bar 54 in the direction away from the engaging groove 523, so that the upper end of the engaging groove 523 is no longer closed. When the next stop head 82 and the engaging groove 523 are directly opposite to each other in the up and down directions, the stop rod 8 moves down under the action of its own gravity until the stop head 82 is engaged with the engaging groove 523, and the upper turntable 52 cannot continue to rotate. The inclined surface 83 is separated from the pawl lever 72, and the pawl 7 rotates under the elastic force of the pawl torsion spring 71 until it is against the inner ratchet 61, preventing the driving gear ring 6 from rotating in the opposite direction.

[0099] If the cause of the blockage is not due to the blockage of the exhaust gap and the exhaust hole 211, the driving gear ring 6 continues to rotate forward so that the lifting gear 23 rotates until the internal thread is directly opposite to the optical axis 214, and the movable seat spring 215 contracts to store force. The movable seat spring 215 keeps the internal thread and the driven thread 213 in a contact and non-transmission state, and the rotation of the driving gear ring 6 causes the lifting gear 23 to idle; the driving piston 41 moves to the limit position driven by the pressure change; when the driving piston 41 is pushed to move by the increased pressure, the driving piston 41 moves to the lower limit position, and the gas that continues to enter the driving air pipe 15 further increases the pressure, and pushes the safety pressure when the pressure is greater than the safety pressure. The full valve 44 moves to the unclosed balancing air hole 151, and the gas in the driving air pipe 15 is discharged to the outside through the balancing air hole 151, so that the pressure is balanced; when the driving piston 41 is driven to move by the reduced pressure, the driving piston 41 moves to the upper limit position and pushes the push plate 442 to move to the upper limit position synchronously, and the movement of the push plate 442 causes the safety valve 44 to move to the unclosed balancing air hole 151, so that no matter in which direction the driving piston 41 moves, the balancing air hole 151 can always be opened when it moves to the limit position, and the safety valve spring 441 contracts to accumulate force. After the pressure is restored, the safety valve 44 moves to the closed balancing air hole under the elastic force of the safety valve spring 441.

Claims

1. A breathing valve for supporting a liquid immersion type instrument, characterized in that: It includes a liquid immersion meter and a valve body with desiccant installed on the liquid immersion meter and communicating with the solution chamber inside the liquid immersion meter; a lifting assembly is provided at the lower part of the valve body; the lifting assembly includes a movable seat hermetically and slidably connected to the lower part of the valve body in the up and down direction, an outer oil barrel fixedly connected to the movable seat, and an elastic ring fixedly connected to the upper end of the outer oil barrel; the lower end of the valve body is formed with a lower end opening and the lower end opening is located inside the outer oil barrel, and sealing oil covering the lower end opening of the valve body is contained inside the outer oil barrel; there is an exhaust gap for gas to pass through between the elastic ring and the valve body; a plurality of exhaust holes for gas to enter and exit are formed on the movable seat; a plurality of drill bit assemblies are arranged inside the valve body, and each drill bit assembly includes a drill bit slidably connected to the valve body in the up and down direction and capable of penetrating the exhaust hole; a driving gear ring for driving the movable seat to slide is rotatably connected inside the valve body; the driving gear ring is in transmission connection with each drill bit; a driving piston hermetically and slidably connected to the valve body and in transmission connection with the driving gear ring is arranged inside the valve body; the pressure inside the valve body increases or decreases to drive the driving piston to slide; when the exhaust gap is blocked, the pressure inside the valve body changes, the driving piston slides to make the driving gear ring rotate, and the movable seat moves downward relative to the valve body so that the exhaust gap is no longer blocked; when the exhaust hole is blocked, the pressure inside the valve body changes, the driving piston slides to make the driving gear ring rotate, and the drill bit slides downward to dredge the exhaust hole.

2. The breathing valve for a supporting liquid immersion type instrument according to claim 1, characterized in that: A drill bit gear ring in transmission connection with each drill bit is rotatably connected inside the valve body; a power storage assembly in transmission connection with the drill bit gear ring is arranged inside the valve body; the power storage assembly includes an upper turntable rotatably connected inside the valve body and in transmission connection with the drill bit gear ring, a lower turntable rotatably connected inside the valve body and located below the upper turntable and in transmission connection with the driving gear ring, and a coil spring arranged between the upper turntable and the lower turntable; a stop rod capable of preventing the upper turntable from rotating is slidably connected to the valve body in the up and down direction; when the stop rod is at the lower limit position, the upper turntable cannot rotate, the rotation of the driving gear ring makes the lower turntable rotate relative to the upper turntable, the coil spring twists to store power, the movable seat moves, and the drill bit does not move; When the stop rod is at the upper limit position, the upper turntable can rotate, and the upper turntable drives the drill bit gear ring to rotate under the elastic force of the coil spring, and each drill bit moves.

3. The breathing valve for a supporting liquid immersion type instrument according to claim 2, characterized in that: The upper end of the upper turntable is formed with a clamping groove that can be engaged with the stop rod; the upper end of the driving gear ring is formed with an inclined driving inclined surface that can push the stop rod upward to move; the inner wall of the driving gear ring is formed with an inner ratchet, and a pawl that can prevent the inner ratchet from rotating in the reverse direction is rotatably connected to the valve body; the lower part of the stop rod is formed with an inclined toggle inclined surface that can push the pawl to rotate; when the driving inclined surface does not contact the stop rod, the stop rod is located at the lower limit position, the stop rod is engaged with the clamping groove, the rotation of the driving gear ring drives the movable seat to slide, the pawl abuts against the inner ratchet and prevents the inner ratchet from rotating in the reverse direction, and avoids the increased exhaust gap from closing again; when the driving inclined surface contacts the stop rod, the rotation of the driving gear ring drives the stop rod to move to the upper limit position, the stop rod is not engaged with the clamping groove, the pawl rotates until it does not abut against the inner ratchet, and the driving gear ring can rotate in the reverse direction after the exhaust hole is unblocked.

4. A breather valve for a supporting liquid immersion type instrument according to claim 3, characterized in that: The force storage assembly also includes a sliding rod slidably connected to the upper end of the upper turntable and capable of being plugged into the locking groove; the sliding rod can prevent the anti-rotation rod from being engaged with the locking groove; the centrifugal force generated when the upper turntable rotates can drive the sliding rod to slide; a compression spring is arranged between the sliding rod and the upper turntable to drive the sliding rod to move away from the locking groove; when the centrifugal force of the rotation of the upper turntable is greater than the elastic force of the compression spring, the sliding rod moves to be plugged into the locking groove, the upper end opening of the locking groove is sealed, and the anti-rotation rod cannot be engaged with the locking groove; when the centrifugal force of the rotation of the upper turntable is less than the elastic force of the compression spring, the sliding rod moves to be not engaged with the locking groove, and the anti-rotation rod moves to be engaged with the locking groove under the action of its own gravity, and each of the drill bits completes penetrating the exhaust hole.

5. The breathing valve for a liquid-immersed instrument according to claim 2, characterized in that: The outer wall of the drill bit is formed with a spiral drill spiral groove; the drill bit assembly also includes a driven plunger slidably connected to the valve body and capable of being slidably connected to the drill spiral groove, a drill gear rotatably connected to the valve body and drivingly connected to the drill gear ring, and a drill spring arranged between the drill bit and the drill gear for pushing the drill bit upward; the drill gear is relatively fixedly connected to the drill bit in the circumferential direction and axially slidably connected; when the driven plunger is located close to the drill bit limit position, the driven plunger is slidably connected to the drill spiral groove, the rotation of the drill gear causes the driven plunger to move in the drill spiral groove, the drill bit rotates and moves downward to clear the exhaust hole, and the drill spring contracts to store force; When the driven rod is located away from the limit position of the drill bit, the driven rod moves out of the spiral groove of the drill bit, and the drill bit moves upward to the upper limit position under the elastic force of the drill bit spring.

6. The breathing valve for a liquid immersion type instrument according to claim 5, characterized in that: The drill bit assembly further includes a switching plug rod that is slidably connected to the valve body and is in transmission connection with the driven plug rod, and a switching frame fixedly connected to the upper part of the drill bit for driving the switching plug rod to slide reciprocally; a switching groove for slidably connecting with the switching plug rod is formed on the switching frame, a first switching inclined surface for pushing the switching plug rod away from the drill bit is formed at the lower end of the switching groove, and a second switching inclined surface for pushing the switching plug rod towards the drill bit is formed at the upper end of the switching groove; when the drill bit moves to the lower limit position, the second switching inclined surface pushes the switching plug rod to move to the limit position close to the drill bit, and the switching plug rod drives the driven plug rod to move to the limit position away from the drill bit; when the drill bit moves to the upper limit position, the first switching inclined surface pushes the switching plug rod to move to the limit position away from the drill bit, and the switching plug rod drives the driven plug rod to move to the limit position close to the drill bit.

7. The breathing valve for a liquid immersion type instrument according to claim 4, characterized in that: The valve body includes a drying cylinder for installing the desiccant, and a driving air pipe fixedly connected to the outer wall of the drying cylinder; the upper part of the driving air pipe communicates with the inner bottom of the drying cylinder; the driving piston is hermetically and slidably connected in the driving air pipe; a driving pipe that is rotationally connected in the driving air pipe and is in transmission connection with the driving gear ring is provided; a driving sliding column is formed on the outer wall of the driving piston, and a spiral upper spiral sliding groove capable of slidably connecting with the driving sliding column is formed at the upper part of the inner wall of the driving pipe, and a spiral lower spiral sliding groove capable of slidably connecting with the driving sliding column is formed at the lower end of the upper spiral sliding groove; the spiral direction of the upper spiral sliding groove is opposite to that of the lower spiral sliding groove; piston springs are arranged between both ends of the driving piston and the inner wall of the driving air pipe; when the exhaust gap or the exhaust hole is blocked and the pressure in the drying cylinder decreases, the driving piston slides upwards, the driving sliding column moves into the upper spiral sliding groove, and the driving gear ring rotates forward; when the exhaust gap or the exhaust hole is blocked and the pressure in the drying cylinder increases, the driving piston slides downwards, the driving sliding column moves into the lower spiral sliding groove, and the driving gear ring rotates forward.

8. A breathing valve for a supporting liquid immersion type instrument according to claim 7, characterized in that: A balance air hole is formed at the inner top of the driving air pipe, and a safety valve capable of closing the balance air hole is hermetically and slidably connected to the inner top of the driving air pipe. A push plate located in the driving air pipe and capable of being pushed by the driving piston is formed at the lower end of the safety valve, and a safety valve spring for pushing the safety valve downwards is arranged between the push plate and the inner wall of the driving air pipe.

9. A breathing valve for a supporting liquid immersion type instrument according to claim 8, characterized in that: A plurality of movable sliding columns are fixedly connected to the upper end of the movable seat, and a lifting gear that is rotationally connected to each movable sliding column and is in transmission connection with the driving gear ring is provided; a section of spiral driven thread is formed on the outer wall of the movable sliding column, and the part without the driven thread is a smooth shaft; an internal thread capable of being threadedly connected with the driven thread is formed on the inner wall of the lifting gear; the internal thread can be aligned with the smooth shaft; a movable seat spring is arranged between the lifting gear and the movable seat.

10. A breathing valve for a matching liquid immersion type instrument according to claim 7, characterized in that: An anti-rotation rib is formed on the inner wall of the driving air pipe along the up-down direction, and an anti-rotation groove is formed on the outer wall of the driving piston for sealing and sliding connection with the anti-rotation rib.

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