CN110566530B - Oil leakage prevention device for electro-hydraulic servo valve - Google Patents

Oil leakage prevention device for electro-hydraulic servo valve Download PDF

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Publication number
CN110566530B
CN110566530B CN201910842536.0A CN201910842536A CN110566530B CN 110566530 B CN110566530 B CN 110566530B CN 201910842536 A CN201910842536 A CN 201910842536A CN 110566530 B CN110566530 B CN 110566530B
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China
Prior art keywords
electro
pipe
servo valve
hydraulic servo
oil leakage
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CN201910842536.0A
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CN110566530A (en
Inventor
倪宇佩
李祥至
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Yantai Zhongyu Aerohydraulic Co ltd
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Yantai Zhongyu Aerohydraulic Co ltd
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Publication of CN110566530A publication Critical patent/CN110566530A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04Special measures taken in connection with the properties of the fluid

Abstract

The invention belongs to the technical field of oil leakage prevention, in particular to an oil leakage prevention device for an electro-hydraulic servo valve, which aims at solving the problem that the existing electro-hydraulic servo valve has no oil leakage prevention design when being overhauled and replaced, and oil can overflow from an oil port of an oil circuit pipe when the electro-hydraulic servo valve is dismantled each time, the invention provides the following scheme, which comprises the electro-hydraulic servo valve, wherein a connecting pipe is communicated with the electro-hydraulic servo valve, a sealing pipe is movably connected onto the connecting pipe, a plurality of sealing rings are arranged on the inner wall of the sealing pipe, the sealing rings are hermetically connected with the outer side of the connecting pipe, four welding rods are symmetrically arranged on the outer side of the sealing pipe, the two welding rods positioned on the same horizontal axis are fixedly provided with the same fixing strip, the invention has convenient operation, can prevent the electro-hydraulic servo valve from oil leakage during overhauling, saves resources, avoids polluting the environment, and can rapidly dismantle and install the electro-hydraulic, meanwhile, the stability of the connecting pipe when the connecting pipe is connected with the sealing pipe is improved.

Description

Oil leakage prevention device for electro-hydraulic servo valve
Technical Field
The invention relates to the technical field of oil leakage prevention, in particular to an oil leakage prevention device for an electro-hydraulic servo valve.
Background
The electrohydraulic servo valve is a key element in electrohydraulic servo control, and is a hydraulic control valve which receives analog electric signal and outputs modulated flow and pressure.
The existing electro-hydraulic servo valve has no oil leakage prevention design when being overhauled and replaced, and oil can overflow from an oil port of an oil path pipe when the electro-hydraulic servo valve is detached every time, so that the environment is polluted and resources are wasted.
Disclosure of Invention
The invention aims to solve the problems that the existing electrohydraulic servo valve in the prior art has no oil leakage prevention design when being overhauled and replaced, and oil can overflow from an oil port of an oil path pipe when the electrohydraulic servo valve is disassembled every time, so that the environment is polluted and resources are wasted.
In order to achieve the purpose, the invention adopts the following technical scheme:
an oil leakage prevention device for an electro-hydraulic servo valve comprises the electro-hydraulic servo valve, a connecting pipe is communicated with the electro-hydraulic servo valve, a sealing pipe is movably connected onto the connecting pipe, a plurality of sealing rings are arranged on the inner wall of the sealing pipe and are in sealing connection with the outer side of the connecting pipe, four welding rods are symmetrically arranged on the outer side of the sealing pipe, the same fixing strip is fixedly arranged on each of the two welding rods on the same horizontal axis, rack rods are slidably arranged on the two fixing strips, arc-shaped parts are fixedly arranged at the ends, close to each other, of the two rack rods and matched with the connecting pipe, two transverse shafts are symmetrically and rotatably arranged on the outer side of the sealing pipe and are rotatably connected with the corresponding two welding rods, a rotating shaft is longitudinally and rotatably arranged on the sealing pipe and matched with the rotating shaft, and a butterfly valve plate is fixedly arranged on the outer side of the rotating shaft, the butterfly valve plate matches with the inner wall of sealing tube, and the equal fixed mounting of one end of two transverse shafts has the gear, gear and the rack bar meshing that corresponds, and the one end symmetry of sealing tube is provided with two first splice pieces, and the outside symmetry of connecting pipe is provided with two second splice pieces, and first splice piece matches with the second splice piece, and the butterfly valve plate is used for sealing up the sealing tube, and the arc increases the stability that connecting pipe and sealing tube are connected.
Preferably, one side of the first splicing block, which is close to the corresponding second splicing block, is provided with a mounting groove, one side of the second splicing block is fixedly provided with a mounting block, the mounting block is matched with the corresponding mounting groove, and the mounting block is matched with the mounting groove to play a role in positioning.
Preferably, the equal fixed mounting in the outside of two horizontal axles has a fixed plate that overturns, and the arc wall has all been seted up to one side that two first concatenation pieces kept away from each other, and two fixed plates that overturns respectively with two arc wall swing joint, two arc walls are linked together with two mounting grooves respectively, and the open slot has all been seted up to one side that two installation pieces kept away from each other, and two open slots cooperate with two fixed plates that overturns respectively, and the horizontal axle rotates and drives the fixed plate that overturns to fix the installation piece in getting into the open slot that corresponds.
Preferably, the one end of rotation axis extends to the outside slidable mounting of sealed tube has the telescopic link, and the one end fixed mounting of telescopic link has fixed box, and four stabilizer holes have evenly been seted up to fixed box's bottom, and one side fixed mounting of one of two fixed strips has two stabilizer bars, and the stabilizer bar cooperatees with the stabilizer hole that corresponds, and the stabilizer bar gets into and can fix a position fixed box in the stabilizer hole.
Preferably, fixed mounting has annular barrier plate on the inner wall of fixed box, and the bottom slidable mounting of annular barrier plate has two joint poles, and the joint groove has all been seted up to one side that two stabilizer bars are close to each other, and the one-way joint in joint pole and the joint groove that corresponds, joint pole entering joint inslot can increase the stability of fixed box, and fixed box is cylinder type structure.
Preferably, the square hole has been seted up at the top of fixed box, and slidable mounting has square piece in the square hole, and the bottom fixed mounting of square piece has the connecting rod, and the bottom of connecting rod rotates the one end of installing two down tube, and the other end of two down tube rotates with two joint poles respectively to be connected, and the down tube can drive corresponding joint pole and remove.
Preferably, two sliding chutes have been seted up to the bottom symmetry of annular barrier plate, and equal slidable mounting has a sliding block in two sliding chutes, and fixed mounting has same spring between sliding block and the sliding chute that corresponds, the bottom of sliding block and the top fixed mounting of the joint pole that corresponds, sliding block play the effect of sliding guide to the joint pole.
Preferably, the top end of the rotating shaft is provided with a rectangular groove, the telescopic rod is connected with the rectangular groove in a sliding mode, and the telescopic rod can drive the rotating shaft to rotate through the rectangular groove.
Preferably, two first bevel gears are fixedly mounted on the outer sides of the rotating shafts, second bevel gears are fixedly mounted at one ends of the two transverse shafts, the first bevel gears are meshed with the corresponding second bevel gears, and the two first bevel gears are symmetrically arranged.
Preferably, the limiting rod is fixedly mounted on the outer side of the arc-shaped part and is connected with the corresponding fixing strip in a sliding mode, and the limiting rod plays a guiding role on the arc-shaped part.
Compared with the prior art, the invention has the advantages that:
(1) when the scheme needs to disassemble and maintain the electro-hydraulic servo valve, the square block is pulled upwards and rotated, so that the rotary shaft drives the butterfly valve plate to rotate to seal the sealing pipe, and the oil leakage phenomenon can be avoided when the butterfly valve plate is disassembled.
(2) This scheme makes the upset fixed plate leave corresponding open slot through rotating square piece in, two arc spare keep away from each other and release the connecting pipe, with the connecting pipe from the sealed intraductal pull out can, can be quick dismantle the electro-hydraulic servo valve, convenient maintenance.
(3) During the installation of this scheme, the fixed box of reverse rotation for two arc pieces are close to each other and fix the connecting pipe, stability when can increase connecting pipe and sealed tube connection.
(4) The scheme is that the fixing plate is turned over and enters the corresponding open slot, so that the electro-hydraulic servo valve can be quickly connected and installed with the sealing pipe.
(5) This scheme is through pressing down fixed box for the joint pole gets into the joint inslot that corresponds, can increase the stability of fixed box, and then increases the stability after the installation.
The invention has convenient operation, can prevent the electro-hydraulic servo valve from leaking oil during maintenance, saves resources, avoids polluting the environment, can quickly disassemble and assemble the electro-hydraulic servo valve, and simultaneously increases the stability of the connection of the connecting pipe and the sealing pipe.
Drawings
FIG. 1 is a schematic structural diagram of an oil leakage prevention apparatus for an electro-hydraulic servo valve according to the present invention;
FIG. 2 is a schematic view of a portion A of an oil leakage preventing device for an electro-hydraulic servo valve according to the present invention;
FIG. 3 is a schematic view of a portion B of an oil leakage preventing apparatus for an electro-hydraulic servo valve according to the present invention;
FIG. 4 is a schematic diagram illustrating a side view connection structure of a connection pipe, a sealing pipe, a fixing bar, a gear, a rack bar, etc. of an oil leakage preventing apparatus for an electro-hydraulic servo valve according to the present invention;
FIG. 5 is a schematic diagram of a side view connection structure of a connection pipe, a splice block, an arc-shaped groove, and an overturn fixing plate of an oil leakage preventing device for an electro-hydraulic servo valve according to the present invention;
FIG. 6 is a schematic perspective view of a first block of an anti-oil-leakage device for an electro-hydraulic servo valve according to the present invention;
fig. 7 is a schematic perspective view illustrating a first mounting block of an oil leakage preventing apparatus for an electro-hydraulic servo valve according to the present invention.
In the figure: the automatic butterfly valve comprises a connecting pipe 1, a sealing pipe 2, a rotating shaft 3, a butterfly valve plate 4, a fixing strip 5, a transverse shaft 6, a first splicing block 7, a second splicing block 8, an arc-shaped piece 9, a fixing box 10, a square block 11, a mounting block 12, a mounting groove 13, an arc-shaped groove 14, a turnover fixing plate 15, an open groove 16, a rack rod 17, a gear 18, a limiting rod 19, a connecting rod 20, an inclined rod 21, an annular blocking plate 22, a stabilizer rod 23, a sliding block 24, a spring 25, a clamping rod 26, a clamping groove 27, a stable hole 28, a telescopic rod 29, a first bevel gear 30, a second bevel gear 31, an electro-hydraulic servo valve 32 and a welding rod 33.
Detailed Description
Referring to fig. 1-7, an oil leakage preventing device for an electro-hydraulic servo valve comprises an electro-hydraulic servo valve 32, a connecting pipe 1 is communicated with the electro-hydraulic servo valve 32, a sealing pipe 2 is movably connected with the connecting pipe 1, a plurality of sealing rings are arranged on the inner wall of the sealing pipe 2, the sealing rings are hermetically connected with the outer side of the connecting pipe 1, four welding rods 33 are symmetrically arranged on the outer side of the sealing pipe 2, two welding rods 33 on the same horizontal axis are fixedly provided with the same fixing strip 5, rack rods 17 are slidably arranged on the two fixing strips 5, arc-shaped pieces 9 are fixedly arranged at the ends of the two rack rods 17 close to each other, the two arc-shaped pieces 9 are matched with the connecting pipe 1, two transverse shafts 6 are symmetrically and rotatably arranged on the outer side of the sealing pipe 2, the transverse shafts 6 are rotatably connected with the corresponding two welding rods 33, a rotating shaft 3 is longitudinally and rotatably arranged on the, two transverse shafts 6 all cooperate with rotation axis 3, the outside fixed mounting of rotation axis 3 has butterfly valve plate 4, butterfly valve plate 4 cooperatees with the inner wall of gland 2, the equal fixed mounting of one end of two transverse shafts 6 has gear 18, gear 18 meshes with the rack bar 17 that corresponds, the one end symmetry of gland 2 is provided with two first splice pieces 7, the outside symmetry of connecting pipe 1 is provided with two second splice pieces 8, first splice piece 7 cooperatees with second splice piece 8, butterfly valve plate 4 is used for sealing up gland 2, the arc 9 increases the stability that connecting pipe 1 is connected with gland 2.
In this embodiment, mounting groove 13 has been seted up to one side that first concatenation piece 7 is close to corresponding second concatenation piece 8, and one side fixed mounting of second concatenation piece 8 has installation piece 12, and installation piece 12 cooperatees with corresponding mounting groove 13, and installation piece 12 and mounting groove 13 cooperation play the positioning action.
In this embodiment, the equal fixed mounting in the outside of two horizontal axles 6 has upset fixed plate 15, arc 14 has all been seted up to one side that two first splice pieces 7 kept away from each other, two upset fixed plate 15 respectively with two arc 14 swing joints, two arc 14 are linked together with two mounting grooves 13 respectively, open slot 16 has all been seted up to one side that two installation pieces 12 kept away from each other, two open slots 16 cooperate with two upset fixed plate 15 respectively, horizontal axle 6 rotates and drives the upset of upset fixed plate 15 and get into and fix installation piece 12 in the corresponding open slot 16.
In this embodiment, the telescopic rod 29 is slidably mounted at the outer side of the rotating shaft 3 extending to the sealing tube 2, the fixing box 10 is fixedly mounted at one end of the telescopic rod 29, four stabilizing holes 28 are uniformly formed in the bottom of the fixing box 10, two stabilizing bars 23 are fixedly mounted on one side of one fixing bar 5 of the two fixing bars 5, the stabilizing bars 23 are matched with the corresponding stabilizing holes 28, and the stabilizing bars 23 can be positioned in the stabilizing holes 28.
In this embodiment, fixed mounting has annular barrier plate 22 on the inner wall of fixed box 10, and the bottom slidable mounting of annular barrier plate 22 has two joint poles 26, and joint groove 27 has all been seted up to one side that two stabilizer bars 23 are close to each other, and joint pole 26 and the one-way joint in the joint groove 27 that corresponds, joint pole 26 get into and can increase the stability of fixed box 10 in joint groove 27, and fixed box 10 is cylinder type structure.
In this embodiment, the quad slit has been seted up at the top of fixed box 10, and slidable mounting has quad slit 11 in the quad slit, and the bottom fixed mounting of quad slit 11 has connecting rod 20, and the bottom of connecting rod 20 rotates the one end of installing two down tube 21, and the other end of two down tube 21 rotates with two joint pole 26 respectively to be connected, and down tube 21 can drive the joint pole 26 removal that corresponds.
In this embodiment, two sliding chutes have been seted up to annular barrier 22's bottom symmetry, and equal slidable mounting has sliding block 24 in two sliding chutes, and fixed mounting has same spring 25 between sliding block 24 and the sliding chute that corresponds, and sliding block 24's bottom and the top fixed mounting of the joint pole 26 that corresponds, sliding block 24 play the effect of sliding guide to joint pole 26.
In this embodiment, the rectangular channel has been seted up on the top of rotation axis 3, and telescopic link 29 and rectangular channel sliding connection, telescopic link 29 can drive rotation axis 3 through the rectangular channel and rotate.
In this embodiment, two first bevel gears 30 are fixedly mounted on the outer side of the rotating shaft 3, two second bevel gears 31 are fixedly mounted at one ends of the two transverse shafts 6, the first bevel gears 30 are engaged with the corresponding second bevel gears 31, and the two first bevel gears 30 are symmetrically arranged.
In this embodiment, the limiting rod 19 is fixedly mounted on the outer side of the arc-shaped part 9, the limiting rod 19 is slidably connected with the corresponding fixing strip 5, and the limiting rod 19 plays a role in guiding the arc-shaped part 9.
Example two
Referring to fig. 1-7, an oil leakage preventing device for an electro-hydraulic servo valve comprises an electro-hydraulic servo valve 32, a connecting pipe 1 is communicated with the electro-hydraulic servo valve 32, a sealing pipe 2 is movably connected with the connecting pipe 1, a plurality of sealing rings are arranged on the inner wall of the sealing pipe 2, the sealing rings are hermetically connected with the outer side of the connecting pipe 1, four welding rods 33 are symmetrically arranged on the outer side of the sealing pipe 2, the two welding rods 33 on the same horizontal axis are fixedly provided with the same fixing strip 5 by welding, rack rods 17 are slidably arranged on the two fixing strips 5, arc-shaped pieces 9 are fixedly arranged at the mutually close ends of the two rack rods 17 by welding, the two arc-shaped pieces 9 are matched with the connecting pipe 1, two transverse shafts 6 are symmetrically and rotatably arranged on the outer side of the sealing pipe 2, the transverse shafts 6 are rotatably connected with the corresponding two welding rods 33, a rotating shaft 3 is longitudinally and rotatably arranged on the sealing, two transverse shafts 6 all cooperate with rotation axis 3, there is butterfly valve plate 4 in the outside of rotation axis 3 through welded fastening, butterfly valve plate 4 cooperatees with the inner wall of sealed tube 2, there is gear 18 all through welded fastening in the one end of two transverse shafts 6, gear 18 meshes with the rack bar 17 that corresponds, the one end symmetry of sealed tube 2 is provided with two first splice pieces 7, the outside symmetry of connecting pipe 1 is provided with two second splice pieces 8, first splice piece 7 cooperatees with second splice piece 8, butterfly valve plate 4 is used for sealing up sealed tube 2, arc 9 increases the stability that connecting pipe 1 and sealed tube 2 are connected.
In this embodiment, mounting groove 13 has been seted up to one side that first concatenation piece 7 is close to corresponding second concatenation piece 8, and welding fixed mounting has installation piece 12 in one side of second concatenation piece 8, and installation piece 12 cooperatees with corresponding mounting groove 13, and installation piece 12 and mounting groove 13 cooperation play the positioning action.
In this embodiment, there are fixed plate 15 in the outside of two horizontal axles 6 all through welded fastening, arc 14 has all been seted up to one side that two first splice pieces 7 kept away from each other, two fixed plate 15 respectively with two arc 14 swing joints, two arc 14 are linked together with two mounting grooves 13 respectively, open slot 16 has all been seted up to one side that two installation pieces 12 kept away from each other, two open slots 16 cooperate with two fixed plate 15 respectively, horizontal axle 6 rotates and drives fixed plate 15 upset and get into and fix installation piece 12 in the corresponding open slot 16.
In this embodiment, the one end of rotation axis 3 extends to the outside slidable mounting of sealed tube 2 has telescopic link 29, and the one end of telescopic link 29 has fixed box 10 through welded fastening, and four stabilizer holes 28 have evenly been seted up to the bottom of fixed box 10, and one side of one of two fixed strips 5 has two stabilizer bars 23 through welded fastening to install, and stabilizer bar 23 cooperatees with corresponding stabilizer hole 28, and stabilizer bar 23 gets into and can fix a position fixed box 10 in stabilizer hole 28.
In this embodiment, there is annular barrier plate 22 through welded fastening on the inner wall of fixed box 10, and there are two joint poles 26 bottom slidable mounting of annular barrier plate 22, and joint groove 27 has all been seted up to one side that two stabilizer bars 23 are close to each other, and joint pole 26 and the one-way joint in joint groove 27 that corresponds, joint pole 26 get into and can increase the stability of fixed box 10 in joint groove 27, and fixed box 10 is the cylinder type structure.
In this embodiment, the quad slit has been seted up at the top of fixed box 10, and slidable mounting has quad slit 11 in the quad slit, and welded fastening installs connecting rod 20 in quad slit 11's bottom, and the bottom of connecting rod 20 rotates the one end of installing two down tube 21, and the other end of two down tube 21 rotates with two joint pole 26 respectively to be connected, and the down tube 21 can drive the joint pole 26 removal that corresponds.
In this embodiment, two sliding chutes have been seted up to annular barrier 22's bottom symmetry, and equal slidable mounting has sliding block 24 in two sliding chutes, has same spring 25 through welded fastening installation between sliding block 24 and the sliding chute that corresponds, and welded fastening installation is passed through with the top of the joint pole 26 that corresponds in sliding block 24's bottom, and sliding block 24 plays the effect of slide guide to joint pole 26.
In this embodiment, the rectangular channel has been seted up on the top of rotation axis 3, and telescopic link 29 and rectangular channel sliding connection, telescopic link 29 can drive rotation axis 3 through the rectangular channel and rotate.
In this embodiment, two first bevel gears 30 are fixedly mounted on the outer side of the rotating shaft 3 by welding, two second bevel gears 31 are fixedly mounted at one ends of the two transverse shafts 6 by welding, the first bevel gears 30 are engaged with the corresponding second bevel gears 31, and the two first bevel gears 30 are symmetrically arranged.
In this embodiment, the limiting rod 19 is fixedly installed on the outer side of the arc-shaped part 9 through welding, the limiting rod 19 is connected with the corresponding fixing strip 5 in a sliding manner, and the limiting rod 19 plays a guiding role for the arc-shaped part 9.
In this embodiment, when the electro-hydraulic servo valve 32 needs to be disassembled and maintained, the square block 11 is pulled upwards first, the square block 11 drives the two slanting rods 21 to turn and approach each other through the connecting rod 20, the two slanting rods 21 drive the two clamping rods 26 to leave the two clamping grooves 27 respectively, the square block 11 is pulled upwards continuously, so that the fixing box 10 moves upwards and leaves the two stabilizing rods 23, wherein the telescopic rod 29 slides in the square groove, the fixing box 10 is rotated to 90 degrees, the fixing box 10 drives the rotating shaft 3 to rotate 90 degrees through the telescopic rod 29, the rotating shaft 3 drives the butterfly valve plate 4 to rotate to seal the sealing tube 2, because of the arrangement of the two first bevel gears 30 and the two second bevel gears 31, wherein the two first bevel gears 30 are symmetrically arranged, so that the rotating shaft 3 drives the two transverse shafts 6 to rotate, and the rotating directions of the two transverse shafts 6 are opposite, the two transverse shafts 6 drive the two turnover fixing, the turnover fixing plate 15 leaves the corresponding open slot 16, at the same time, the two transverse shafts 6 respectively drive the two gears 18 to rotate, the two gears 18 drive the two rack rods 17 to be away from each other, the two rack rods 17 drive the two arc-shaped pieces 9 to be away from each other to release the connecting pipe 1, and the connecting pipe 1 is pulled out of the sealing pipe 2, wherein the butterfly valve plate 4 does not leak oil after sealing the sealing pipe 2, and after maintenance or replacement, installation is needed, the connecting pipe 1 is inserted into the sealing pipe 2, so that the installation block 12 enters the corresponding installation groove 13, the connecting pipe 1 is sealed by the sealing ring arranged in the sealing pipe 2, the fixing box 10 is rotated reversely, and rotates 90 degrees, at the moment, the stabilizer bar 23 and the corresponding two stabilizing holes 28 are positioned on the same vertical axis, so that the two transverse shafts 6 drive the two arc-shaped pieces 9 to be close to each other through the two gears 18 and the two rack rods 17, stability when connecting pipe 1 is connected with sealing tube 2 can be increased, upset fixed plate 15 gets into in the open slot 16 that corresponds simultaneously, butterfly valve plate 4 upset 90 opens the sealed to sealing tube 2, press down fixed box 10 for in stabilizer bar 23 gets into the stable hole 28 that corresponds, stabilizer bar 23 extrudees the joint pole 26 that corresponds, under spring 25's elastic force effect, in the joint pole 26 gets into the joint groove 27 that corresponds, accomplish the installation, can use.

Claims (10)

1. An oil leakage prevention device for an electro-hydraulic servo valve comprises the electro-hydraulic servo valve (32), wherein a connecting pipe (1) is communicated with the electro-hydraulic servo valve (32), the oil leakage prevention device is characterized in that a sealing pipe (2) is movably connected onto the connecting pipe (1), a plurality of sealing rings are arranged on the inner wall of the sealing pipe (2), the sealing rings are hermetically connected with the outer side of the connecting pipe (1), four welding rods (33) are symmetrically arranged on the outer side of the sealing pipe (2), the same fixing strip (5) is fixedly arranged on the two welding rods (33) on the same horizontal axis, rack rods (17) are slidably arranged on the two fixing strips (5), arc-shaped pieces (9) are fixedly arranged at one ends, close to each other, of the two arc-shaped pieces (9) are matched with the connecting pipe (1), two transverse shafts (6) are symmetrically and rotatably arranged on the outer side of the sealing pipe (2), horizontal axle (6) are rotated with two welding rod (33) that correspond and are connected, vertical rotation is installed rotation axis (3) on sealed tube (2), two horizontal axles (6) all cooperate with rotation axis (3), the outside fixed mounting of rotation axis (3) has butterfly valve plate (4), butterfly valve plate (4) cooperate with the inner wall of sealed tube (2), the equal fixed mounting of one end of two horizontal axles (6) has gear (18), gear (18) and rack bar (17) meshing that corresponds, the one end symmetry of sealed tube (2) is provided with two first concatenation pieces (7), the outside symmetry of connecting pipe (1) is provided with two second concatenation pieces (8), first concatenation piece (7) cooperate with second concatenation piece (8).
2. The oil leakage prevention device for the electro-hydraulic servo valve according to claim 1, wherein one side of the first splicing block (7) close to the corresponding second splicing block (8) is provided with a mounting groove (13), one side of the second splicing block (8) is fixedly provided with a mounting block (12), and the mounting block (12) is matched with the corresponding mounting groove (13).
3. The oil leakage prevention device for the electro-hydraulic servo valve according to claim 2, wherein the outer sides of the two transverse shafts (6) are fixedly provided with turnover fixing plates (15), the sides of the two first splicing blocks (7) away from each other are provided with arc-shaped grooves (14), the two turnover fixing plates (15) are movably connected with the two arc-shaped grooves (14) respectively, the two arc-shaped grooves (14) are communicated with the two installation grooves (13) respectively, the sides of the two installation blocks (12) away from each other are provided with open grooves (16), and the two open grooves (16) are matched with the two turnover fixing plates (15) respectively.
4. The oil leakage preventing device for the electro-hydraulic servo valve according to claim 1, wherein one end of the rotating shaft (3) extends to the outer side of the sealing pipe (2) and is slidably provided with a telescopic rod (29), one end of the telescopic rod (29) is fixedly provided with a fixing box (10), four stabilizing holes (28) are uniformly formed in the bottom of the fixing box (10), one side of one fixing strip (5) of the two fixing strips (5) is fixedly provided with two stabilizing rods (23), and the stabilizing rods (23) are matched with the corresponding stabilizing holes (28).
5. The oil leakage preventing device for the electro-hydraulic servo valve according to claim 4, wherein an annular blocking plate (22) is fixedly installed on the inner wall of the fixing box (10), two clamping rods (26) are slidably installed at the bottom of the annular blocking plate (22), clamping grooves (27) are formed in the sides, close to each other, of the two stabilizing rods (23), and the clamping rods (26) are in one-way clamping connection with the corresponding clamping grooves (27).
6. The oil leakage prevention device for the electro-hydraulic servo valve according to claim 5, wherein a square hole is formed at the top of the fixing box (10), a square block (11) is slidably installed in the square hole, a connecting rod (20) is fixedly installed at the bottom end of the square block (11), one end of two inclined rods (21) is rotatably installed at the bottom end of the connecting rod (20), and the other end of the two inclined rods (21) is rotatably connected with the two clamping rods (26) respectively.
7. The oil leakage preventing device for the electro-hydraulic servo valve according to claim 5, wherein the annular blocking plate (22) is symmetrically provided with two sliding grooves at the bottom, sliding blocks (24) are slidably mounted in the two sliding grooves, the same spring (25) is fixedly mounted between each sliding block (24) and the corresponding sliding groove, and the bottom of each sliding block (24) is fixedly mounted with the top of the corresponding clamping rod (26).
8. The oil leakage preventing device for the electro-hydraulic servo valve as claimed in claim 1, wherein the top end of the rotating shaft (3) is provided with a rectangular groove, and the telescopic rod (29) is slidably connected with the rectangular groove.
9. The oil leakage preventing device for the electro-hydraulic servo valve as claimed in claim 1, wherein two first bevel gears (30) are fixedly installed at the outer side of the rotating shaft (3), two second bevel gears (31) are fixedly installed at one end of each of the two transverse shafts (6), and the first bevel gears (30) are engaged with the corresponding second bevel gears (31).
10. The oil leakage prevention device for the electro-hydraulic servo valve as claimed in claim 1, wherein a limiting rod (19) is fixedly installed at the outer side of the arc-shaped member (9), and the limiting rod (19) is slidably connected with the corresponding fixing strip (5).
CN201910842536.0A 2019-09-06 2019-09-06 Oil leakage prevention device for electro-hydraulic servo valve Active CN110566530B (en)

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