CN105527169A - Method for testing anti-hydropressure performance of shield tail sealing grease of shield machine - Google Patents
Method for testing anti-hydropressure performance of shield tail sealing grease of shield machine Download PDFInfo
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- CN105527169A CN105527169A CN201410510402.6A CN201410510402A CN105527169A CN 105527169 A CN105527169 A CN 105527169A CN 201410510402 A CN201410510402 A CN 201410510402A CN 105527169 A CN105527169 A CN 105527169A
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Abstract
The invention discloses a method for testing anti-hydropressure performance of shield tail sealing grease of a shield machine. The method is characterized in that wire mesh is arranged in a stainless steel cylinder, a layer of shield tail sealing grease with 25 mm thickness is paved on the wire mesh, distilled water is added on the surface of the sealing grease; a seal cover of the stainless steel cylinder is tightly screwed, high pressure air or nitrogen is introduced, pressure can be respectively adjusted so that pressure in the cylinder can reach 1.0 MPa and 3.6 MPa, pressure maintaining time is set; under different pressure and pressure maintaining time, according to water leakage condition of the bottom of the stainless steel cylinder, pressure maintaining value of the sealing grease can be determined. According to the method, the anti-hydropressure performance of the shield tail sealing grease can be qualitatively evaluated, highest anti-hydropressure can be quantitatively analyzed, thereby anti-hydropressure performance index of the shield tail sealing grease can be visually determined, usage of poor sealing grease can be avoided, and sealing performance of the shield tail can be guaranteed.
Description
Technical field
The present invention relates to a kind of tail seal grease of shield hydraulic pressure resistance performance test methods of shield machine.
Background technology
Shield technique is the operating technique being widely used in the Fully-mechanized excavation of subterranean tunnel, and it adopts shield machine to tunnel in underground, while preventing the avalanche of soft ground excavation face or keeping excavation face stable, carries out excavation and the lining cutting operation of tunnel safely.In shield machine, tail seal grease of shield is the important materials of shield structure tail seal, is used for filling the space between shield tail wire brush and section of jurisdiction.Seal grease is combined the invasion that the tail sealing layer formed effectively can stop mud and underground water with wire brush, make the afterbody of shield structure realize sealing.
Hydraulic pressure resistance sealing property is the most important index of tail seal grease of shield, in order to test the sealing property of seal grease under strong hydraulic pressure.Owing to still not forming the standard of unified tail seal grease of shield hydraulic pressure resistance sealing property method of testing at present, to cause the test of tail seal grease of shield hydraulic pressure resistance performance and evaluation and inconsistent, thus it is very different to result in tail seal grease of shield quality, affect the sealing property of shield tail in shield machine.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of tail seal grease of shield hydraulic pressure resistance performance test methods of shield machine, this method both can the hydraulic pressure resistance performance of qualitative evaluation tail seal grease of shield, all right its water resistant top pressure of quantitative test, thus the hydraulic pressure resistance performance index of tail seal grease of shield can be judged more intuitively, avoid the use of poor sealing grease, ensure the sealing property of shield tail.
For solving the problems of the technologies described above, the tail seal grease of shield hydraulic pressure resistance performance test methods of shield machine of the present invention comprises the steps:
Step one, in the stainless steel cylindrical drum being provided with gland bonnet, arrange the wire gauze that aperture is 1mm, wire gauze is laid the tail seal grease of shield that one deck 25mm is thick, bubble-free during filling seal grease and compress, flatten, seal grease surface adds distilled water;
Step 2, screw the gland bonnet of stainless steel cylindrical drum, the distilled water side in stainless steel cylindrical drum passes into pressure-air or nitrogen, regulates air or nitrogen pressure, makes cylinder pressure reach 1.0MPa, and pressurize 10min;
Step 3, within the dwell time that cylinder pressure is 1.0MPa, as having drainage bottom stainless steel cylindrical drum, then the water resistant top pressure of sealing grease is for being less than 1.0MPa, end of test, as bottom stainless steel cylindrical drum without drainage, then test continuation;
The pressure-air that step 4, stainless steel cylindrical drum pass into or nitrogen slowly pressurize with the pressing speed of 0.6MPa/min, until top pressure reaches 3.6MPa, drainage is there is bottom pressure process stainless steel cylindrical drum, then record the force value of moment of leaking, this force value is the water resistant maximal pressure force value of sealing grease;
Step 5, in stainless steel cylindrical drum, top pressure reaches 3.6MPa, still without drainage bottom stainless steel cylindrical drum, then pressurize 10min at this pressure, drainage is there is bottom pressure maintaining period stainless steel cylindrical drum, then the water resistant top pressure of sealing grease is 3.6MPa, without drainage bottom pressure maintaining period stainless steel cylindrical drum, then the water resistant top pressure of sealing grease is greater than 3.6MPa.
Because the tail seal grease of shield hydraulic pressure resistance performance test methods of shield machine of the present invention have employed technique scheme, namely this method arranges wire gauze in stainless steel cylindrical drum, wire gauze is laid the tail seal grease of shield that one deck 25mm is thick, seal grease surface adds distilled water; The gland bonnet screwing stainless steel cylindrical drum passes into pressure-air or nitrogen, regulates pressure to make cylinder pressure reach 1.0MPa and 3.6MPa respectively, and sets the dwell time; At various pressures with in the dwell time, according to bottom stainless steel cylindrical drum with or without leaking, judge the hydraulic pressure resistance force value of seal grease accordingly.This method both can the hydraulic pressure resistance performance of qualitative evaluation tail seal grease of shield, all right its water resistant top pressure of quantitative test, thus can judge the hydraulic pressure resistance performance index of tail seal grease of shield more intuitively, avoid the use of poor sealing grease, ensure the sealing property of shield tail.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, the present invention is described in further detail:
Fig. 1 is the schematic diagram arranging wire gauze, seal grease in this method in stainless steel cylindrical drum.
Embodiment
The tail seal grease of shield hydraulic pressure resistance performance test methods of shield machine of the present invention comprises the steps:
Step one, as shown in Figure 1, the wire gauze 2 that aperture is 1mm is set in the stainless steel cylindrical drum 1 being provided with gland bonnet 11, wire gauze 2 is laid the thick tail seal grease of shield of one deck 25mm 3, bubble-free during filling seal grease 3 and compress, flatten, seal grease 3 surface adds distilled water 4;
Step 2, screw the gland bonnet 11 of stainless steel cylindrical drum 1, distilled water 4 side in stainless steel cylindrical drum 1 passes into pressure-air or nitrogen 5, regulates air or nitrogen 5 pressure, makes cylinder pressure reach 1.0MPa, and pressurize 10min;
Step 3, within the dwell time that cylinder pressure is 1.0MPa, as having drainage bottom stainless steel cylindrical drum 1, then the water resistant top pressure of sealing grease 3 is for being less than 1.0MPa, end of test, as bottom stainless steel cylindrical drum 1 without drainage, then test continuation;
The pressure-air that step 4, stainless steel cylindrical drum 1 pass into or nitrogen 5 slowly pressurize with the pressing speed of 0.6MPa/min, until top pressure reaches 3.6MPa, drainage is there is bottom pressure process stainless steel cylindrical drum 1, then record the force value of moment of leaking, this force value is the water resistant maximal pressure force value of sealing grease 3;
Step 5, in stainless steel cylindrical drum 1, top pressure reaches 3.6MPa, still without drainage bottom stainless steel cylindrical drum 1, then pressurize 10min at this pressure, drainage is there is bottom pressure maintaining period stainless steel cylindrical drum 1, then the water resistant top pressure of sealing grease 3 is 3.6MPa, without drainage bottom pressure maintaining period stainless steel cylindrical drum 1, then the water resistant top pressure of sealing grease 3 is greater than 3.6MPa.
In this method of testing, water resistant top pressure is higher, illustrates that the hydraulic pressure resistance sealing property of sealing grease is better.Adopt this method to test current use four kinds of seal grease samples widely, test result sees the following form:
| Sample sequence number | 1 | 2 | 3 | 4 |
| Top pressure (MPa) | ＞3.6 | 2.8 | 2.2 | ＜1.0 |
From test result, sequence number 1 seal grease pressurize 10min under 3.6MPa does not still have drainage, and therefore its water resistant top pressure is for being greater than 3.6MPa; Namely there is drainage in sequence number 4 seal grease pressurize 2min under 1.0MPa, then its water resistant top pressure is for being less than 1.0MPa.
Table is visible thus, and the hydraulic pressure resistance sealing property of above four kinds of seal greases is sequence number 1 seal grease > sequence number 2 seal grease > sequence number 3 seal grease > sequence number 4 seal grease.Show that this method can evaluate the hydraulic pressure resistance sealing property of tail seal grease of shield intuitively further, and finally can obtain the hydraulic pressure resistance force value of sealing grease, thus correct review is made to seal grease performance, avoid the use of poor sealing grease, ensure the sealing property of shield tail.
Claims (1)
1. a tail seal grease of shield hydraulic pressure resistance performance test methods for shield machine, is characterized in that this method comprises the steps:
Step one, in the stainless steel cylindrical drum being provided with gland bonnet, arrange the wire gauze that aperture is 1mm, wire gauze is laid the tail seal grease of shield that one deck 25mm is thick, bubble-free during filling seal grease and compress, flatten, seal grease surface adds distilled water;
Step 2, screw the gland bonnet of stainless steel cylindrical drum, the distilled water side in stainless steel cylindrical drum passes into pressure-air or nitrogen, regulates air or nitrogen pressure, makes cylinder pressure reach 1.0MPa, and pressurize 10min;
Step 3, within the dwell time that cylinder pressure is 1.0MPa, as having drainage bottom stainless steel cylindrical drum, then the water resistant top pressure of sealing grease is for being less than 1.0MPa, end of test, as bottom stainless steel cylindrical drum without drainage, then test continuation;
The pressure-air that step 4, stainless steel cylindrical drum pass into or nitrogen slowly pressurize with the pressing speed of 0.6MPa/min, until top pressure reaches 3.6MPa, drainage is there is bottom pressure process stainless steel cylindrical drum, then record the force value of moment of leaking, this force value is the water resistant maximal pressure force value of sealing grease;
Step 5, in stainless steel cylindrical drum, top pressure reaches 3.6MPa, still without drainage bottom stainless steel cylindrical drum, then pressurize 10min at this pressure, drainage is there is bottom pressure maintaining period stainless steel cylindrical drum, then the water resistant top pressure of sealing grease is 3.6MPa, without drainage bottom pressure maintaining period stainless steel cylindrical drum, then the water resistant top pressure of sealing grease is greater than 3.6MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410510402.6A CN105527169A (en) | 2014-09-29 | 2014-09-29 | Method for testing anti-hydropressure performance of shield tail sealing grease of shield machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410510402.6A CN105527169A (en) | 2014-09-29 | 2014-09-29 | Method for testing anti-hydropressure performance of shield tail sealing grease of shield machine |
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| CN105527169A true CN105527169A (en) | 2016-04-27 |
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| CN201410510402.6A Withdrawn CN105527169A (en) | 2014-09-29 | 2014-09-29 | Method for testing anti-hydropressure performance of shield tail sealing grease of shield machine |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226003A (en) * | 2016-09-27 | 2016-12-14 | 中铁工程装备集团有限公司 | Shield machine shield ventral brush sealing property tester and test method |
| CN106525344A (en) * | 2016-12-14 | 2017-03-22 | 新乡市恒星科技有限责任公司 | Shield tail grease anti-hydraulic pressure sealing property test device |
| CN109060545A (en) * | 2018-08-24 | 2018-12-21 | 北京交通大学 | The Water Pressure Resistance device for dynamically detecting of tail seal grease of shield |
| CN109883616A (en) * | 2019-03-28 | 2019-06-14 | 中国石油化工股份有限公司 | A kind of shield grease special measuring of resistance to water tightness instrument and test method |
| CN111473923A (en) * | 2020-05-15 | 2020-07-31 | 上海隧道工程有限公司 | Normal-pressure cutter inspection device and method for shield machine |
| CN118150057A (en) * | 2024-05-13 | 2024-06-07 | 三峡物资招标管理有限公司 | Positive pressure leakage detection method for main seal of transformer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718609A (en) * | 2009-12-11 | 2010-06-02 | 石家庄铁道学院 | Water-pressure resisting performance test device and method thereof of shield tail seal grease of shield machine |
| CN102854119A (en) * | 2012-09-06 | 2013-01-02 | 中国石油化工股份有限公司 | Water resistance sealing performance evaluation method for sealing grease, and detection apparatus thereof |
-
2014
- 2014-09-29 CN CN201410510402.6A patent/CN105527169A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718609A (en) * | 2009-12-11 | 2010-06-02 | 石家庄铁道学院 | Water-pressure resisting performance test device and method thereof of shield tail seal grease of shield machine |
| CN102854119A (en) * | 2012-09-06 | 2013-01-02 | 中国石油化工股份有限公司 | Water resistance sealing performance evaluation method for sealing grease, and detection apparatus thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226003A (en) * | 2016-09-27 | 2016-12-14 | 中铁工程装备集团有限公司 | Shield machine shield ventral brush sealing property tester and test method |
| CN106525344A (en) * | 2016-12-14 | 2017-03-22 | 新乡市恒星科技有限责任公司 | Shield tail grease anti-hydraulic pressure sealing property test device |
| CN109060545A (en) * | 2018-08-24 | 2018-12-21 | 北京交通大学 | The Water Pressure Resistance device for dynamically detecting of tail seal grease of shield |
| CN109060545B (en) * | 2018-08-24 | 2024-07-16 | 北京交通大学 | Dynamic detection device for water-pressure resistance of shield tail sealing grease |
| CN109883616A (en) * | 2019-03-28 | 2019-06-14 | 中国石油化工股份有限公司 | A kind of shield grease special measuring of resistance to water tightness instrument and test method |
| CN109883616B (en) * | 2019-03-28 | 2020-09-22 | 中国石油化工股份有限公司 | Special measuring instrument and testing method for water-resistant sealing performance of shield grease |
| CN111473923A (en) * | 2020-05-15 | 2020-07-31 | 上海隧道工程有限公司 | Normal-pressure cutter inspection device and method for shield machine |
| CN111473923B (en) * | 2020-05-15 | 2022-06-28 | 上海隧道工程有限公司 | Normal-pressure cutter inspection device and method for shield tunneling machine |
| CN118150057A (en) * | 2024-05-13 | 2024-06-07 | 三峡物资招标管理有限公司 | Positive pressure leakage detection method for main seal of transformer |
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Application publication date: 20160427 |
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