CN102926788A - Pressure regulation method for resistance-increasing and constant-resistance stages of hydraulic bracket - Google Patents
Pressure regulation method for resistance-increasing and constant-resistance stages of hydraulic bracket Download PDFInfo
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- CN102926788A CN102926788A CN2012104628129A CN201210462812A CN102926788A CN 102926788 A CN102926788 A CN 102926788A CN 2012104628129 A CN2012104628129 A CN 2012104628129A CN 201210462812 A CN201210462812 A CN 201210462812A CN 102926788 A CN102926788 A CN 102926788A
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Abstract
The invention discloses a pressure regulation method for resistance-increasing and constant-resistance stages of a hydraulic bracket, which comprises the steps that: a hydraulic system is configured; a liquid pump is adopted, and is connected with operating valves through a main liquid supply pipe and a main liquid return pipe respectively; hydraulic oil circuits are arranged at the bottom ends of four uprights, and connected with the hydraulic system through a safety valve and a hydraulic control one-way valve sequentially; after the bracket is subject to setting, a top plate is regulated to sink; the pressures in lower cavities of the uprights are regulated to the aligning pressure of the safety valve of the bracket; with the continuous increasing of the pressure on the top plate, the safety valve is regulated to be opened for overflow; the uprights shrink downward to lead the pressure of the top plate to be decreased; a pressure curve is drawn, and changes undulately with time; the supporting power of the bracket to the top plate is called as operating resistance, and is determined by the settling pressure of the safety valve of the bracket; and the operating pressure of a pump station is increased continuously. The method has the benefits that the hydraulic bracket has structural characteristics and properties of a supporting bracket and a shielding bracket, and has the advantages of large supporting power, good topping property, good shielding property, large ventilation section and the like.
Description
Technical field
The present invention relates to the hydraulic technique field, relate in particular to a kind of hydraulic support and increase resistance constant-resistance staged pressure control method.
Background technology
Hydraulic system has that power is large, operating pressure and the flow adjustability is good, heat can be brought back the advantages such as fuel tank, adopt hydraulic system to produce more power than other devices, under equal power, the volume of hydraulic means is little, lightweight, power density large, compact conformation; Simultaneously, the hydraulic means Comparision is steady because lightweight, inertia is little, reaction is fast, hydraulic means is easy to realize quick startup, braking and commutating frequently.At the working face of coal seam environment, generally select hydraulic shield support, Coal Seam Thickness Change then select greatly large the and anti-horizontal thrust of the scope of heightening strong and with the shield of wall supporting to improve the support force situation.Its structure generally comprises the body structures such as back timber, caving shield, base, and column satisfies the needs that support is heightened scope to increase impulse stroke.In order to improve advancing velocity, guarantee the immediate support to top board, adopt hydraulic system to divide at the installation position of coal-face by hydraulic support, middle hydraulic support is mounted in the support of all positions of coal-face except face end, divide by its form of structure, can be divided into three basic forms of it, that is: brace type, protected type and support shield type.Therefore, for adapting to the demand of different coal mining environment, raise the efficiency the fastness with the support part, existing bracket component structure and material are innovated seemed extremely important.
Summary of the invention
The purpose of this invention is to provide a kind of setting load large, cut that the top performance is strong, barrier propterty good, the ventilation section large, good stability, be conducive to guarantee top board immediate support, the hydraulic support that can reduce labour intensity are increased resistance constant-resistance staged pressure control method, to solve many deficiencies of prior art.
Purpose of the present invention is come specific implementation by the following technical programs:
A kind of hydraulic support increases resistance constant-resistance staged pressure control method, mainly is comprised of following steps:
At first, the configuration hydraulic system arranges a liquid pump and connects two by main feed pipe, main liquid back pipe respectively and handles valves, hydraulic circuit is set four column bottoms and is connected with hydraulic system through safety valve, hydraulic control one-way valve successively;
⑵ after carry out just support of support, regulate the top board action of sinking, cavity pressure under the column is adjusted to the safety valve levelling pressure of support, along with roof pressure continues to increase, regulation safety valve is opened overflow, contracts under the column, roof pressure is reduced, column cavity of resorption pressure decreased, after being lower than the safety valve pressure adjustment, safety valve stops overflow;
⑶ draw pressure curve and in time undulate variation, support is called working resistance to the support force of top board, it is determined by the support set pressure for safety valve, continue to improve the pumping plant operating pressure, finished the reach of support and transporter by the advancing jack on the base, when the needs support moves forward, the post unloading is fallen first, and then high pressure liquid enters the rod end chamber of advancing jack.
The beneficial effect that hydraulic support of the present invention increases resistance constant-resistance staged pressure control method is: the design feature and the performance that have brace type and shield concurrently, can adapt to various roof and floor conditions, have support force large, cut the advantages such as the top performance is strong, barrier propterty good, the ventilation section large, good stability, applied range, be conducive to improve the extraneous working effect of support, can improve the operation controllability, be conducive to guarantee to the top board immediate support, can reduce labour intensity.
The specific embodiment
The described hydraulic support of the embodiment of the invention increases resistance constant-resistance staged pressure control method, and its key step comprises:
At first, the configuration hydraulic system arranges a liquid pump and connects two by main feed pipe, main liquid back pipe respectively and handles valves, hydraulic circuit is set four column bottoms and is connected with hydraulic system through safety valve, hydraulic control one-way valve successively;
⑵ after carry out just support of support, regulate the top board action of sinking, cavity pressure under the column is adjusted to the safety valve levelling pressure of support, along with roof pressure continues to increase, regulation safety valve is opened overflow, contracts under the column, roof pressure is reduced, column cavity of resorption pressure decreased, after being lower than the safety valve pressure adjustment, safety valve stops overflow;
⑶ draw pressure curve and in time undulate variation, support is called working resistance to the support force of top board, it is determined by the support set pressure for safety valve, continue to improve the pumping plant operating pressure, finished the reach of support and transporter by the advancing jack on the base, when the needs support moves forward, the post unloading is fallen first, and then high pressure liquid enters the rod end chamber of advancing jack.
Claims (1)
1. a hydraulic support increases resistance constant-resistance staged pressure control method, it is characterized in that, mainly is comprised of following steps:
At first, the configuration hydraulic system arranges a liquid pump and connects two by main feed pipe, main liquid back pipe respectively and handles valves, hydraulic circuit is set four column bottoms and is connected with hydraulic system through safety valve, hydraulic control one-way valve successively;
⑵ after carry out just support of support, regulate the top board action of sinking, cavity pressure under the column is adjusted to the safety valve levelling pressure of support, along with roof pressure continues to increase, regulation safety valve is opened overflow, contracts under the column, roof pressure is reduced, column cavity of resorption pressure decreased, after being lower than the safety valve pressure adjustment, safety valve stops overflow;
⑶ draw pressure curve and in time undulate variation, support is called working resistance to the support force of top board, it is determined by the support set pressure for safety valve, continue to improve the pumping plant operating pressure, finished the reach of support and transporter by the advancing jack on the base, when the needs support moves forward, the post unloading is fallen first, and then high pressure liquid enters the rod end chamber of advancing jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104628129A CN102926788A (en) | 2012-11-16 | 2012-11-16 | Pressure regulation method for resistance-increasing and constant-resistance stages of hydraulic bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104628129A CN102926788A (en) | 2012-11-16 | 2012-11-16 | Pressure regulation method for resistance-increasing and constant-resistance stages of hydraulic bracket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102926788A true CN102926788A (en) | 2013-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104628129A Pending CN102926788A (en) | 2012-11-16 | 2012-11-16 | Pressure regulation method for resistance-increasing and constant-resistance stages of hydraulic bracket |
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| CN (1) | CN102926788A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410115A (en) * | 2019-07-22 | 2019-11-05 | 天地科技股份有限公司 | A kind of column pressure adaptive regulator control system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2131039C1 (en) * | 1998-03-17 | 1999-05-27 | Тульский государственный университет | Hydraulic drive of powered support unit |
| CN1786420A (en) * | 2004-12-10 | 2006-06-14 | 兖州煤业股份有限公司 | Electric hydraulic controlled caving coal method and it hydraulic supporter |
| WO2009024136A2 (en) * | 2007-08-23 | 2009-02-26 | Tiefenbach Control Systems Gmbh | Stope supporting structure for face support in mines |
-
2012
- 2012-11-16 CN CN2012104628129A patent/CN102926788A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2131039C1 (en) * | 1998-03-17 | 1999-05-27 | Тульский государственный университет | Hydraulic drive of powered support unit |
| CN1786420A (en) * | 2004-12-10 | 2006-06-14 | 兖州煤业股份有限公司 | Electric hydraulic controlled caving coal method and it hydraulic supporter |
| WO2009024136A2 (en) * | 2007-08-23 | 2009-02-26 | Tiefenbach Control Systems Gmbh | Stope supporting structure for face support in mines |
Non-Patent Citations (3)
| Title |
|---|
| 吴小旺: "《液压支架机联合仿真与液压控制***分析》", 《工程科技Ⅰ辑》 * |
| 费飞: "《ZFS4800型液压支架的结构分析与强度计算》", 《农业装备技术》 * |
| 马长青等: "《掘进工作面液压支架结构研究与设计》", 《煤矿机械》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410115A (en) * | 2019-07-22 | 2019-11-05 | 天地科技股份有限公司 | A kind of column pressure adaptive regulator control system |
| CN110410115B (en) * | 2019-07-22 | 2020-11-17 | 天地科技股份有限公司 | Self-adaptive control system for pressure of stand column |
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Application publication date: 20130213 |