阅读说明：本技术 断电自动复位液压系统 (Automatic power-off reset hydraulic system ) 是由 周辉 于 2021-08-09 设计创作，主要内容包括：断电自动复位液压系统。涉及对现有的断电自动复位液压系统的改进。结构合理,工作稳定性高。包括液压站、单向阀、断电复位阀和蓄能器,所述蓄能器包括壳体,所述壳体的顶部设有盖体,所述盖体上设有通气道,所述壳体的底部设有输液道,所述壳体内适配地设有活塞,所述活塞的外壁上设有至少两条密封圈；所述壳体的内壁上设有储油腔和通孔,所述通孔内设有油帽,所述油帽与所述储油腔的内壁之间设有第一弹簧；所述活塞设有容置槽,所述容置槽内设有推杆,所述推杆的一端与容置槽的槽底之间设有第二弹簧,所述推杆的外径小于通孔的内径,所述推杆的另一端指向通孔、且呈半球状,所述第一弹簧的劲度系数小于所述第二弹簧的劲度系数。(And (5) automatically resetting the hydraulic system when the power is cut off. Relates to an improvement of an existing power-off automatic reset hydraulic system. Reasonable structure and high working stability. The energy accumulator comprises a shell, a cover body is arranged at the top of the shell, an air channel is arranged on the cover body, a liquid conveying channel is arranged at the bottom of the shell, a piston is arranged in the shell in a matched mode, and at least two sealing rings are arranged on the outer wall of the piston; an oil storage cavity and a through hole are formed in the inner wall of the shell, an oil cap is arranged in the through hole, and a first spring is arranged between the oil cap and the inner wall of the oil storage cavity; the piston is equipped with the storage tank, be equipped with the push rod in the storage tank, be equipped with the second spring between the one end of push rod and the tank bottom of storage tank, the external diameter of push rod is less than the internal diameter of through-hole, the directional through-hole of the other end of push rod, and be hemispherical, the stiffness coefficient of first spring is less than the stiffness coefficient of second spring.)

1. Outage automatic re-setting hydraulic system, including hydraulic pressure station, check valve, outage reset valve and energy storage ware, its characterized in that: the energy accumulator comprises a shell with a closed bottom and an open top, a cover body used for sealing the opening is arranged at the top of the shell, an air channel is arranged on the cover body, a liquid conveying channel is arranged at the bottom of the shell, a piston is arranged in the shell in a matched manner, the shell is divided into an upper cavity and a lower cavity which are not communicated with each other by the piston, and at least two sealing rings are arranged on the outer wall of the piston;

an oil storage cavity for placing lubricating oil and through holes communicated with the oil storage cavity are formed in the inner wall of the shell, the through holes are arranged at intervals along the height direction of the shell, oil caps for blocking the through holes are arranged in the through holes, and a first spring is arranged between the oil caps and the inner wall of the oil storage cavity;

the piston is equipped with the storage tank towards one side of through-hole, be equipped with the push rod in the storage tank, the one end of push rod with be equipped with the second spring between the tank bottom of storage tank, the external diameter of push rod is less than the internal diameter of through-hole, the other end of push rod is directional the through-hole, and be hemispherical, the stiffness coefficient of first spring is less than the stiffness coefficient of second spring.

2. The power-off automatic-return hydraulic system according to claim 1, characterized in that: the axial section of the oil cap is in an inverted trapezoid shape with a large left and a small right, the maximum outer diameter of the oil cap is larger than the inner diameter of the through hole, and the minimum outer diameter of the oil cap is smaller than the inner diameter of the through hole.

3. The power-off automatic-return hydraulic system according to claim 1, characterized in that: the containing groove is located in the middle of the outer wall of the piston, and the axis of the containing groove and the axis of the through hole are in the same vertical plane.

4. The power-off automatic-return hydraulic system according to claim 1, characterized in that: a plurality of convex strips are arranged on the sealing ring at intervals, one side of each convex strip is fixedly connected with the sealing ring, and the other side of each convex strip is abutted against the inner wall of the shell.

5. The power-off automatic-return hydraulic system according to claim 1, characterized in that: the shell is further provided with a pipeline for communicating the oil storage cavity with the oil transportation equipment, and the oil transportation equipment continuously conveys lubricating oil into the oil storage cavity through the pipeline.

Technical Field

The invention relates to a power-off automatic reset hydraulic system, in particular to an improvement on the conventional power-off automatic reset hydraulic system.

Background

The power-off reset hydraulic system can be used in the mine and metallurgy industries and used for controlling a loading gate or other feeding devices under a bin. The power-off reset hydraulic system consists of a hydraulic station, a hydraulic cylinder, an energy accumulator, a power-off reset solenoid valve and other hydraulic accessories. Under the normal use condition, electromagnetic overflow valve and outage reset solenoid valve get electric, and the pneumatic cylinder stretches out, and the gate is opened, and the pneumatic cylinder withdrawal is controlled to the solenoid valve after the loading is accomplished, and the gate is closed. If the power is cut off when the gate is opened for charging, the power-off reset electromagnetic valve is powered off, and the hydraulic oil stored in the energy accumulator is released through the one-way valve and enters the front cavity of the hydraulic cylinder to close the gate. The condition that the gate can not be closed when power failure occurs during charging can be avoided, and the safety production of loading operation under the bin is ensured.

The upper portion of its piston of current piston accumulator is compressed gas, and the lower part is pressure fluid, and its simple structure, the installation is easy, and it is convenient to maintain, long service life, but the piston can produce great wearing and tearing after long-time work, influences the job stabilization nature of system.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the power-off automatic reset hydraulic system which is reasonable in structure and high in working stability.

The invention is realized by adopting the following technical scheme: the power-off automatic reset hydraulic system comprises a hydraulic station, a one-way valve, a power-off reset valve and an energy accumulator, wherein the energy accumulator comprises a shell with a closed bottom and an open top, a cover body used for sealing the open top is arranged at the top of the shell, an air passage is arranged on the cover body, a liquid conveying passage is arranged at the bottom of the shell, a piston is arranged in the shell in a matched manner, the shell is divided into an upper cavity and a lower cavity which are not communicated with each other by the piston, and at least two sealing rings are arranged on the outer wall of the piston;

an oil storage cavity for placing lubricating oil and through holes communicated with the oil storage cavity are formed in the inner wall of the shell, the through holes are arranged at intervals along the height direction of the shell, oil caps for blocking the through holes are arranged in the through holes, and a first spring is arranged between the oil caps and the inner wall of the oil storage cavity;

the piston is equipped with the storage tank towards one side of through-hole, be equipped with the push rod in the storage tank, the one end of push rod with be equipped with the second spring between the tank bottom of storage tank, the external diameter of push rod is less than the internal diameter of through-hole, the other end of push rod is directional the through-hole, and be hemispherical, the stiffness coefficient of first spring is less than the stiffness coefficient of second spring.

The axial section of the oil cap is in an inverted trapezoid shape with a large left and a small right, the maximum outer diameter of the oil cap is larger than the inner diameter of the through hole, and the minimum outer diameter of the oil cap is smaller than the inner diameter of the through hole.

The containing groove is located in the middle of the outer wall of the piston, and the axis of the containing groove and the axis of the through hole are in the same vertical plane.

A plurality of convex strips are arranged on the sealing ring at intervals, one side of each convex strip is fixedly connected with the sealing ring, and the other side of each convex strip is abutted against the inner wall of the shell.

The shell is further provided with a pipeline for communicating the oil storage cavity with the oil transportation equipment, and the oil transportation equipment continuously conveys lubricating oil into the oil storage cavity through the pipeline.

Compared with the prior art, when the axial line of the containing groove is not coincident with the axial line of any through hole, the outer wall of the shell is pressed against the push rod, the second spring is in a compressed state, and when the axial line of the containing groove is coincident with the axial line of any through hole, the stiffness coefficient of the first spring is smaller than the stiffness coefficient of the second spring, so that the compressed second spring can release energy and extend, the push rod pushes the oil cap to move towards the inside of the oil storage cavity, a gap is generated between the oil cap and the through hole, and lubricating oil in the oil storage cavity can overflow to the outside from the gap, so that a reliable lubricating state is kept between the outer wall of the piston and the inner wall of the shell, the structure is reasonable, and the working stability of the energy accumulator is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a first schematic structural diagram of an accumulator;

FIG. 3 is a schematic diagram II of the accumulator;

in the figure: 1. a hydraulic station; 2. a one-way valve; 3. a power-off reset valve; 4. an accumulator; 41. a housing; 411. an infusion channel; 412. an upper chamber; 413. a lower chamber; 414. an oil storage chamber; 415. a through hole; 42. a cover body; 420. an air duct; 43. a piston; 430. a containing groove; 44. a seal ring; 440. a convex strip; 45. an oil cap; 46. a first spring; 47. a push rod; 48. a second spring.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

As shown in fig. 1-3, the power-off automatic reset hydraulic system includes a hydraulic station 1, a check valve 2, a power-off reset valve 3 and an energy accumulator 4, where the energy accumulator 4 includes a casing 41 with a closed bottom and an open top, a cover 42 for sealing the open top is disposed on the top of the casing 41, an air passage 420 is disposed on the cover 42, a liquid passage 411 is disposed at the bottom of the casing 41, a piston 43 is fittingly disposed in the casing 41, the casing 41 is divided into an upper chamber 412 and a lower chamber 413 that are not communicated with each other by the piston 43, and at least two sealing rings 44 are disposed on the outer wall of the piston 43;

an oil storage cavity 414 for placing lubricating oil and through holes 415 communicated with the oil storage cavity 414 are formed in the inner wall of the shell 41, the through holes 415 are arranged at intervals along the height direction of the shell 41, an oil cap 45 for blocking the through holes 415 is arranged in the through holes 415, and a first spring 46 is arranged between the oil cap 45 and the inner wall of the oil storage cavity 414;

one side of the piston 43 facing the through hole 415 is provided with a containing groove 430, a push rod 47 is arranged in the containing groove 430, a second spring 48 is arranged between one end of the push rod 47 and the bottom of the containing groove 430, the outer diameter of the push rod 47 is smaller than the inner diameter of the through hole 415, the other end of the push rod 47 points to the through hole 415 and is hemispherical, and the stiffness coefficient of the first spring 46 is smaller than that of the second spring 48. Under the normal use condition, the power-off reset valve 3 is electrified, the hydraulic cylinder extends out, the gate is opened, the loading completion rear pressure cylinder retracts, and the gate is closed. If the power is cut off when the gate is opened for charging, the power-off reset valve 3 is powered off, the hydraulic oil stored in the energy accumulator 4 is released through the one-way valve 2 and enters the front cavity of the hydraulic cylinder to close the gate; the energy storage and release of the energy accumulator 4 can make the piston 43 generate the linear reciprocating motion in the vertical direction, when the axis of the containing groove 430 is not coincident with the axis of any through hole 415 during the movement of the piston 43, the outer wall of the housing 41 presses the push rod 47, the second spring 48 is in a compressed state, and when the axis of the receiving groove 430 coincides with the axis of any one of the through holes 415, since the stiffness coefficient of the first spring 46 is smaller than the stiffness coefficient of the second spring 48, the compressed second spring 48 will release energy to elongate, so that the push rod 47 pushes the oil cap 45 to move towards the inside of the oil storage cavity 414, and a gap is generated between the oil cap 45 and the through hole 415, the lubricating oil in the oil storage cavity 414 overflows to the outside from the gap, therefore, a reliable lubricating state is kept between the outer wall of the piston 43 and the inner wall of the shell 41, the structure is reasonable, and the working stability of the energy accumulator 4 is improved; the other end of the push rod 47 is hemispherical, so that the push rod 47 can be conveniently reset under the continuous motion of the piston 43; thus, by ejecting and resetting the push rod 47 and intermittently matching the push rod 47 with the plurality of oil caps 45, a small amount of lubricating oil is added for a plurality of times, the lubricating reliability is ensured, and the pollution to hydraulic oil or compressed gas caused by excessive addition of the lubricating oil is avoided.

The axial section of the oil cap 45 is in an inverted trapezoid shape with a large left and a small right, the maximum outer diameter of the oil cap 45 is larger than the inner diameter of the through hole 415, and the minimum outer diameter of the oil cap 45 is smaller than the inner diameter of the through hole. Thus, when the axis of the accommodation groove 430 does not coincide with the axis of the through hole 415, the oil cap 45 reliably blocks the through hole 415 by the urging action of the first spring 46, and the lubricating oil is prevented from leaking from the through hole 415.

The receiving groove 430 is located in the middle of the outer wall of the piston 43, and the axis of the receiving groove 430 and the axis of the through hole 415 are in the same vertical plane. The containing groove 430 is located in the middle of the outer wall of the piston 43, so that the lubricating oil can be sealed between the two sealing rings 44 after overflowing, and thus, the lubricating oil is further ensured not to pollute the hydraulic oil or the compressed gas.

A plurality of protruding strips 440 are arranged on the sealing ring 44 at intervals, one side of each protruding strip 440 is fixedly connected with the sealing ring 44, and the other side of each protruding strip 440 abuts against the inner wall of the shell 41. Through the setting of a plurality of sand grips 440, when guaranteeing that piston 43 can reliably seal, slip, the reciprocating motion of sand grip 440 can scrape lubricating oil between two adjacent sand grips 440, plays certain reserve lubricating oil's effect, simultaneously, also can improve the scattered degree of consistency of the shop of lubricating oil on casing 41 inner wall, further improves lubricated effect, has guaranteed that energy storage device 4 can be in stable operating condition all the time.

The housing 41 is further provided with a pipeline for communicating the oil storage cavity 414 with an oil transportation device, and the oil transportation device continuously conveys lubricating oil into the oil storage cavity 414 through the pipeline. Thus, the liquid level of the lubricating oil in the oil storage cavity 414 is ensured to be above the uppermost through hole 415, and sufficient lubricating oil in the oil storage cavity 414 overflows after the push rod 47 pushes the uppermost through hole 415.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.