阅读说明：本技术 一种液压立柱增压增速回路及增压增速方法 (Hydraulic upright post pressurization and acceleration loop and pressurization and acceleration method ) 是由 李坤 李永堂 梁涛 王永辉 仉志强 刘志奇 王鲁军 于 2021-08-26 设计创作，主要内容包括：本发明提供一种液压立柱增压增速回路,与液压立柱连接,液压立柱的无杆腔与液控单向阀,第三单向阀的连接,液控单向阀与旁路阀连接,旁路阀一端与油箱连接,一端通过第三电液换向阀、第四电液换向阀与高压泵站连接,连接线路上设置有第二蓄能器；第三单向阀与第二电液换向阀连接,第二电液换向阀一端与油箱连接,一端与增压泵站连接,与增加泵站连接线路上设置有第一蓄能器；液压立柱的有杆腔与液控单向阀以及第一电液换向阀连接,第一电液换向阀一端与油箱连接,一端与增压泵站连接；可有效提高液压立柱初撑力,加快液压立柱下降速度,缩短升压阶段的时间,并用于液压支架的升柱,从而达到能量的回收利用,实现节能。(The invention provides a hydraulic upright post pressurization and acceleration loop which is connected with a hydraulic upright post, wherein a rodless cavity of the hydraulic upright post is connected with a hydraulic control one-way valve and a third one-way valve; the third one-way valve is connected with the second electro-hydraulic reversing valve, one end of the second electro-hydraulic reversing valve is connected with the oil tank, the other end of the second electro-hydraulic reversing valve is connected with the booster pump station, and a first energy accumulator is arranged on a connecting line of the booster pump station and the booster pump station; a rod cavity of the hydraulic upright column is connected with a hydraulic control one-way valve and a first electro-hydraulic reversing valve, one end of the first electro-hydraulic reversing valve is connected with an oil tank, and the other end of the first electro-hydraulic reversing valve is connected with a booster pump station; the hydraulic support can effectively improve the initial supporting force of the hydraulic stand column, accelerate the descending speed of the hydraulic stand column, shorten the time of a boosting stage, and is used for lifting the hydraulic support column, thereby achieving the recycling of energy and realizing energy conservation.)

1. The utility model provides a hydraulic column pressure boost acceleration rate return circuit, is connected with hydraulic column (18), its characterized in that: comprises a booster pump station (1), an oil tank (2), a high-pressure pump station (3), a first energy accumulator (7), an electromagnetic directional valve (8), a second energy accumulator (9), a first electro-hydraulic directional valve (10), a second electro-hydraulic directional valve (11), a third one-way valve (12), a hydraulic control one-way valve (14), a bypass valve (15), a third electro-hydraulic directional valve (16) and a fourth electro-hydraulic directional valve (17),

the rodless cavity of the hydraulic upright post (18) is connected with the liquid outlet of the hydraulic control one-way valve (14) and the liquid outlet of the third one-way valve (12),

a liquid inlet of the hydraulic control one-way valve (14) is connected with a bypass valve (15), one end of the bypass valve (15) is connected with the oil tank (2), and the other end of the bypass valve is connected with the high-pressure pump station (3) through a third electro-hydraulic reversing valve (16) and a fourth electro-hydraulic reversing valve (17);

a liquid inlet of the third one-way valve (12) is connected with a second electro-hydraulic reversing valve (11), one end of the second electro-hydraulic reversing valve (11) is connected with the oil tank (2), and the other end of the second electro-hydraulic reversing valve is connected with the booster pump station (1);

a rod cavity of the hydraulic upright post (18) is connected with a hydraulic control port of a hydraulic control one-way valve (14) and a first electro-hydraulic reversing valve (10), one end of the first electro-hydraulic reversing valve (10) is connected with the oil tank (2), and the other end of the first electro-hydraulic reversing valve is connected with the booster pump station (1);

the second energy accumulator (9) is connected to a connecting pipeline of a third electro-hydraulic directional valve (16), a fourth electro-hydraulic directional valve (17) and the high-pressure pump station (3) through an electromagnetic directional valve (8);

and the first energy accumulator (7) is connected to a connecting pipeline between the second electro-hydraulic reversing valve (11) and the booster pump station (1).

2. The hydraulic column pressurization and speed increase circuit of claim 1, wherein: the rodless cavity of the hydraulic upright post (18) is connected with a liquid inlet pipeline of the safety valve (13).

3. The hydraulic column pressurization and speed increase circuit of claim 1, wherein: and a second one-way valve (6) is connected on the connecting pipeline of the third electro-hydraulic reversing valve (16), the fourth electro-hydraulic reversing valve (17) and the high-pressure pump station (3).

4. The hydraulic column pressurization and speed increase circuit of claim 1, wherein: and a first one-way valve (4) is arranged on a connecting pipeline between the second electro-hydraulic reversing valve (11) and the booster pump station (1).

5. The hydraulic column pressurization and speed increase circuit of claim 1, wherein: and a liquid return circuit breaker valve (5) is arranged on a connecting pipeline between the second electro-hydraulic reversing valve (11) and the mailbox (2).

6. The hydraulic column pressure boost speed increase circuit of claim 1, characterized in that: the hydraulic upright post is quickly lifted, a rodless cavity of the hydraulic upright post is connected with a liquid outlet of a hydraulic control one-way valve, a liquid inlet of the hydraulic control one-way valve is connected with a bypass valve, one end of the bypass valve is connected with an oil tank, the other end of the bypass valve is connected with a high-pressure pump station through a third electro-hydraulic reversing valve and a fourth electro-hydraulic reversing valve, a second energy accumulator is connected to a connecting pipeline of the third electro-hydraulic reversing valve and the fourth electro-hydraulic reversing valve and the high-pressure pump station, and oil is supplied to the rodless cavity through the third electro-hydraulic reversing valve, the fourth electro-hydraulic reversing valve and the electromagnetic reversing valve by using the high-pressure pump station and the second energy accumulator, so that the hydraulic upright post is quickly lifted;

the hydraulic upright post is quickly pressurized, a rodless cavity of the hydraulic upright post is connected with a liquid outlet of a third one-way valve, a liquid inlet of the third one-way valve is connected with a second electro-hydraulic reversing valve, one end of the second electro-hydraulic reversing valve is connected with an oil tank, the other end of the second electro-hydraulic reversing valve is connected with a booster pump station, a connecting pipeline of the second electro-hydraulic reversing valve and the booster pump station is connected with a first energy accumulator, and the hydraulic upright post is pressurized by utilizing a high-pressure pump station through the second, third and fourth electro-hydraulic reversing valves and an electromagnetic reversing valve;

the quick column descending method of the hydraulic column comprises the steps that a rod cavity of the hydraulic column is connected with a hydraulic control one-way valve hydraulic control port and a first electro-hydraulic reversing valve, one end of the first electro-hydraulic reversing valve is connected with an oil tank, one end of the first electro-hydraulic reversing valve is connected with a booster pump station, the booster pump station is controlled by the first electro-hydraulic reversing valve to enter the rod cavity of the hydraulic column, the quick column descending of the hydraulic column is achieved, and meanwhile an electromagnetic reversing valve is used for communicating a second energy accumulator with a high-pressure pump station during the column descending process to store energy.

Technical Field

The invention belongs to the technical field of hydraulic systems, and particularly relates to a hydraulic upright post pressurization and acceleration loop and a pressurization and acceleration method.

Background

The underground coal mining of the fully mechanized mining surface needs a hydraulic support as a safety support device, and the supporting force of the hydraulic support on a coal top plate is very important to the operation safety. Along with the development of a large mining height hydraulic support, the requirement on the initial supporting force of a rodless cavity of a hydraulic upright column is continuously increased, and because the working pressure of an unloading valve of a common emulsion pump station is about 31.5MPa and the initial supporting pressure is less than the actual working pressure, the working pressure of the emulsion pump station restricts the lifting of the initial supporting pressure; in the second aspect, when the upright post descends, the rod cavity of the upright post has the characteristics of small flow and high pressure, and the working pressure of the existing emulsion pump station is 31.5MPa, so that the development of rapid descending of the hydraulic support is restricted. In the third aspect, the hydraulic support passes through the stages of descending, pushing, pulling, lifting and boosting in the frame moving process, and the total frame moving time can be directly influenced due to the influence of elastic deformation of the long liquid supply rubber pipe and longer time in the boosting stage.

Disclosure of Invention

The invention aims to provide a hydraulic upright post pressurization and acceleration loop which can effectively improve the initial supporting force of a hydraulic upright post, accelerate the descending speed of the hydraulic upright post and shorten the time of a boosting stage, and is used for lifting a hydraulic support, so that the energy is recycled, and the energy is saved.

The invention provides a hydraulic upright post pressurization and acceleration method, which is another object of the invention.

In order to achieve the purpose, the technical scheme of the invention is that a hydraulic upright post pressurization and acceleration loop is connected with a hydraulic upright post (18) and comprises a pressurization pump station (1), an oil tank (2), a high-pressure pump station (3), a first energy accumulator (7), an electromagnetic reversing valve (8), a second energy accumulator (9), a first electro-hydraulic reversing valve (10), a second electro-hydraulic reversing valve (11), a third one-way valve (12), a hydraulic control one-way valve (14), a bypass valve (15), a third electro-hydraulic reversing valve (16) and a fourth electro-hydraulic reversing valve (17),

the rodless cavity of the hydraulic upright post (18) is connected with the liquid outlet of the hydraulic control one-way valve (14) and the liquid outlet of the third one-way valve (12),

a liquid inlet of the hydraulic control one-way valve (14) is connected with a bypass valve (15), one end of the bypass valve (15) is connected with the oil tank (2), and the other end of the bypass valve is connected with the high-pressure pump station (3) through a third electro-hydraulic reversing valve (16) and a fourth electro-hydraulic reversing valve (17);

a liquid inlet of the third one-way valve (12) is connected with a second electro-hydraulic reversing valve (11), one end of the second electro-hydraulic reversing valve (11) is connected with the oil tank (2), and the other end of the second electro-hydraulic reversing valve is connected with the booster pump station (1);

a rod cavity of the hydraulic upright post (18) is connected with a hydraulic control port of a hydraulic control one-way valve (14) and a first electro-hydraulic reversing valve (10), one end of the first electro-hydraulic reversing valve (10) is connected with the oil tank (2), and the other end of the first electro-hydraulic reversing valve is connected with the booster pump station (1);

the second energy accumulator (9) is connected to a connecting pipeline of a third electro-hydraulic directional valve (16), a fourth electro-hydraulic directional valve (17) and the high-pressure pump station (3) through an electromagnetic directional valve (8);

and the first energy accumulator (7) is connected to a connecting pipeline between the second electro-hydraulic reversing valve (11) and the booster pump station (1).

The rodless cavity of the hydraulic upright post (18) is connected with a liquid inlet pipeline of the safety valve (13).

And a second one-way valve (6) is connected on the connecting pipeline of the third electro-hydraulic reversing valve (16), the fourth electro-hydraulic reversing valve (17) and the high-pressure pump station (3).

And a first one-way valve (4) is arranged on a connecting pipeline between the second electro-hydraulic reversing valve (11) and the booster pump station (1).

And a liquid return circuit breaker valve (5) is arranged on a connecting pipeline between the second electro-hydraulic reversing valve (11) and the mailbox (2).

The invention has the advantages that the column can be quickly lowered by reversing through the first electro-hydraulic reversing valve; and the second electro-hydraulic reversing valve is used for reversing to realize the pressurization of the stand column. The pressurizing loop does not need to change other parts of the hydraulic support, and has the advantages of good practicability and universality, lower cost and high safety and reliability.

A method for increasing the pressure and the speed of a hydraulic upright column,

the hydraulic upright post is quickly lifted, a rodless cavity of the hydraulic upright post is connected with a liquid outlet of a hydraulic control one-way valve, a liquid inlet of the hydraulic control one-way valve is connected with a bypass valve, one end of the bypass valve is connected with an oil tank, the other end of the bypass valve is connected with a high-pressure pump station through a third electro-hydraulic reversing valve and a fourth electro-hydraulic reversing valve, a second energy accumulator is connected to a connecting pipeline of the third electro-hydraulic reversing valve and the fourth electro-hydraulic reversing valve and the high-pressure pump station, and oil is supplied to the rodless cavity through the third electro-hydraulic reversing valve, the fourth electro-hydraulic reversing valve and the electromagnetic reversing valve by using the high-pressure pump station and the second energy accumulator, so that the hydraulic upright post is quickly lifted;

the hydraulic upright post is quickly pressurized, a rodless cavity of the hydraulic upright post is connected with a liquid outlet of a third one-way valve, a liquid inlet of the third one-way valve is connected with a second electro-hydraulic reversing valve, one end of the second electro-hydraulic reversing valve is connected with an oil tank, the other end of the second electro-hydraulic reversing valve is connected with a booster pump station, a connecting pipeline of the second electro-hydraulic reversing valve and the booster pump station is connected with a first energy accumulator, and the hydraulic upright post is pressurized by utilizing a high-pressure pump station through the second, third and fourth electro-hydraulic reversing valves and an electromagnetic reversing valve;

the quick column descending method of the hydraulic column comprises the steps that a rod cavity of the hydraulic column is connected with a hydraulic control one-way valve hydraulic control port and a first electro-hydraulic reversing valve, one end of the first electro-hydraulic reversing valve is connected with an oil tank, one end of the first electro-hydraulic reversing valve is connected with a booster pump station, the booster pump station is controlled by the first electro-hydraulic reversing valve to enter the rod cavity of the hydraulic column, the quick column descending of the hydraulic column is achieved, and meanwhile an electromagnetic reversing valve is used for communicating a second energy accumulator with a high-pressure pump station during the column descending process to store energy.

The method for boosting and increasing the speed can ensure the initial supporting force of the hydraulic upright column, simultaneously solve the problem of low descending speed of the hydraulic upright column caused by small flow and high pressure of the rod cavity, shorten the boosting time and improve the column lifting speed.

Drawings

FIG. 1, a hydraulic column pressurization and speed-increasing loop method;

in the figure: 1-booster pump station, 2-oil tank, 3-high-pressure pump station, 4-first one-way valve, 5-liquid return circuit breaker valve, 6-second one-way valve, 7-first energy accumulator, 8-electromagnetic reversing valve, 9-second energy accumulator, 10-first electro-hydraulic reversing valve, 11-second electro-hydraulic reversing valve, 12-third one-way valve, 13-safety valve, 14-hydraulic control one-way valve, 15-bypass valve, 16-third electro-hydraulic reversing valve, 17-fourth electro-hydraulic reversing valve and 18-hydraulic upright post.

Detailed Description

The invention is described in further detail below with reference to fig. 1 and example 1:

as shown in fig. 1, a hydraulic column pressurization and acceleration loop is connected with a hydraulic column 18 and comprises a pressurization pump station 1, an oil tank 2, a high-pressure pump station 3, a first check valve 4, a liquid return circuit breaker valve 5, a second check valve 6, a first energy accumulator 7, an electromagnetic directional valve 8, a second energy accumulator 9, a first electro-hydraulic directional valve 10, a second electro-hydraulic directional valve 11, a third check valve 12, a safety valve 13, a hydraulic control check valve 14, a bypass valve 15, a third electro-hydraulic directional valve 16 and a fourth electro-hydraulic directional valve 17;

a rodless cavity of a hydraulic upright column 18 is communicated with a liquid inlet of a safety valve 13 and liquid outlets of a hydraulic control one-way valve 14 and a third one-way valve 12, a liquid inlet of the hydraulic control one-way valve 14 is connected with a bypass valve 15, one end of the bypass valve 15 is connected with an oil tank 2, the other end of the bypass valve 15 passes through a third electro-hydraulic reversing valve 16, a fourth electro-hydraulic reversing valve 17 is connected with a high-pressure pump station 3, a second one-way valve 6 is connected to a connecting pipeline of the third electro-hydraulic reversing valve 16, the fourth electro-hydraulic reversing valve 17 and the high-pressure pump station 3, a second energy accumulator 9 is connected with the pipeline through an electromagnetic reversing valve 8, and the connection is used for controlling the rising of the upright column 18. A liquid inlet of the one-way valve 12 is connected with a second electro-hydraulic reversing valve 11, one end of the second electro-hydraulic reversing valve 11 is connected with the oil tank 2, the other end of the second electro-hydraulic reversing valve 11 is connected with the booster pump station 1, a connecting pipeline of the second electro-hydraulic reversing valve 11 and the booster pump station 1 is connected with a first one-way valve 4 and a first energy accumulator 7, and the connection realizes the boosting of the hydraulic upright column 18; a rod cavity of the hydraulic upright column 1 is connected with a hydraulic control port of a hydraulic control one-way valve 14 and a first electro-hydraulic reversing valve 10, one end of the first electro-hydraulic reversing valve 10 is connected with an oil tank 2, and the other end of the first electro-hydraulic reversing valve is connected with a booster pump station 1, so that the upright column 18 can be quickly lowered, and meanwhile, a second energy accumulator and a high-pressure pump station are communicated to store energy by utilizing the electro-hydraulic reversing valve during the column lowering process.

The safety pressure set value of the safety valve 13 is 42.5MPa, the working set pressure value of the high-pressure pump station 3 is 31.5MPa, and the working set pressure value of the booster pump station 1 is 40 MPa.

When the hydraulic upright column 18 descends, the first electro-hydraulic reversing valve 10 reverses, the booster pump station 1 enters the rod cavity of the hydraulic upright column 18 through the first electro-hydraulic reversing valve 10, and the rapid descending of the upright column 18 is achieved. The oil in the rodless chamber returns to the tank 2 through the pilot operated check valve 14 and the bypass valve 15.

And in the column descending and frame pulling stages, the electromagnetic reversing valve 8 reverses, and the second energy accumulator 9 is communicated with the high-pressure pump station 3 to accumulate energy.

When the hydraulic upright column 18 rises, the third electro-hydraulic directional valve 16, the fourth electro-hydraulic directional valve 17 and the electromagnetic directional valve 8 are in direction change, the high-pressure pump station 3 simultaneously supplies oil to the rodless cavity of the hydraulic upright column 18 through the two directional valves and the second energy accumulator 9, the quick column rising of the hydraulic upright column is realized, and meanwhile, the hydraulic oil in the rod cavity of the hydraulic upright column 18 returns to the oil tank 2 through the first electro-hydraulic directional valve 10. After the lifting of the column is completed, the second electro-hydraulic directional valve 11, the third electro-hydraulic directional valve 16, the fourth electro-hydraulic directional valve 17 and the electromagnetic directional valve 8 are reversed, and the booster pump station 1 works to realize the boosting of the rodless cavity of the upright column 18.