CN220488270U - Hydraulic support stand column taking pure water as medium for coal mine and piston seal for jack - Google Patents
Hydraulic support stand column taking pure water as medium for coal mine and piston seal for jack Download PDFInfo
- Publication number
- CN220488270U CN220488270U CN202322167776.XU CN202322167776U CN220488270U CN 220488270 U CN220488270 U CN 220488270U CN 202322167776 U CN202322167776 U CN 202322167776U CN 220488270 U CN220488270 U CN 220488270U
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- Prior art keywords
- ring
- slip ring
- sealing
- coal mine
- pure water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000003245 coal Substances 0.000 title claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 40
- 229920001971 elastomer Polymers 0.000 claims abstract description 27
- 239000000806 elastomer Substances 0.000 claims abstract description 9
- -1 polytetrafluoroethylene Polymers 0.000 claims description 13
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 9
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 9
- 230000007062 hydrolysis Effects 0.000 claims description 8
- 238000006460 hydrolysis reaction Methods 0.000 claims description 8
- 229920002635 polyurethane Polymers 0.000 claims description 8
- 239000004814 polyurethane Substances 0.000 claims description 8
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 6
- 229920002530 polyetherether ketone Polymers 0.000 claims description 6
- 229920006324 polyoxymethylene Polymers 0.000 claims description 6
- 229930040373 Paraformaldehyde Natural products 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 abstract description 3
- 238000005065 mining Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Sealing Devices (AREA)
Abstract
The utility model belongs to the technical field of underground coal mine fully-mechanized mining face supporting equipment, and particularly relates to a hydraulic support upright post taking pure water as a medium for a coal mine and a piston seal for a jack. The sealing device comprises a rubber elastomer, a sealing slip ring, a pressure protection ring, a first L-shaped check ring and a second L-shaped check ring; the rubber elastic body provides pretightening force for the sealing slip ring, a trapezoid groove is arranged on the outer side of the sealing slip ring, the retaining ring is arranged in the trapezoid groove, and the first L-shaped retaining ring and the second L-shaped retaining ring are distributed on two sides of the rubber elastic body and the sealing slip ring in a full-package mode. The utility model ensures that the piston seal whole has lower sliding friction force under the pure water medium environment, thereby improving the wear resistance; meanwhile, due to the fact that the coal mine hydraulic support upright post and the jack are in actual use under the condition of infrequent reciprocation, secondary sealing is achieved, and leakage is further reduced. The extrusion resistance of the rubber elastomer and the sealing slip ring is improved, and the pressure resistance can be improved to 180MPa.
Description
Technical Field
The utility model belongs to the technical field of underground coal mine fully-mechanized mining face supporting equipment, and particularly relates to a hydraulic support upright post taking pure water as a medium for a coal mine and a piston seal for a jack.
Background
The hydraulic support is an important component of fully mechanized mining equipment in coal mine underground equipment in China, and can reliably and effectively support and control a top plate of a working face through upright posts and jacks of the hydraulic support to isolate a goaf. At present, the working medium of the underground hydraulic support is mainly emulsion, and in actual production, a large amount of emulsion leakage pollutes underground water due to production accidents or equipment maintenance and replacement processes, so that the production of coal mine safety and environmental protection is severely challenged. Therefore, pure water can be used as a hydraulic power medium of the hydraulic support upright post and the jack, and the production cost is reduced. The emulsion has good lubricating effect, and the sealing element used in the upright post and the jack of the existing coal mine hydraulic support has lower friction force. The lubricity of pure water is very poor, and if the sealing element is applied to a hydraulic system of a pure water medium, the friction between the sealing element and the inner wall of a cylinder barrel as well as the friction between the sealing element and a piston rod are increased, so that the abrasion is increased; the service life of the sealing element is reduced, the stable operation of equipment is influenced, and the production efficiency is reduced.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, and provides a hydraulic support upright post and a jack piston seal for a coal mine by taking pure water as a medium.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a hydraulic support upright post taking pure water as a medium for a coal mine and a piston seal for a jack comprise a rubber elastomer, a sealing slip ring, a pressure retaining ring, a first L-shaped check ring and a second L-shaped check ring; the rubber elastic body provides pretightening force for the sealing slip ring, a trapezoid groove is arranged on the outer side of the sealing slip ring, the retaining ring is arranged in the trapezoid groove, and the first L-shaped retaining ring and the second L-shaped retaining ring are distributed on two sides of the rubber elastic body and the sealing slip ring in a full-package mode.
Preferably, the sealing slip ring is made of any ultra-high molecular weight polyethylene or modified polytetrafluoroethylene.
Preferably, the pressure maintaining ring is made of any hydrolysis-resistant polyurethane.
Preferably, the first L-shaped check ring and the second L-shaped check ring are made of any modified polyoxymethylene or polyether ether ketone.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, ultra-high molecular weight polyethylene or modified polytetrafluoroethylene is used as a sealing slip ring material instead of polyurethane, so that the piston sealing whole still has lower sliding friction force in a pure water medium environment, and the wear resistance is improved; meanwhile, due to the fact that the coal mine hydraulic support upright post and the jack are in actual use under the condition that reciprocation is not frequent, the trapezoid groove is formed in the outer side of the sealing slip ring, the sealing slip ring is tightly attached to the inner wall of the cylinder barrel by means of good pressure resistance of polyurethane, secondary sealing is achieved, and leakage is further reduced. The L-shaped check rings on two sides are modified by modified polyformaldehyde and polyether-ether-ketone materials, so that the extrusion resistance of the rubber elastomer and the sealing slip ring is further improved, and the pressure resistance can be improved to 180MPa.
Drawings
FIG. 1 is a schematic perspective view of the present utility model;
FIG. 2 is a schematic cross-sectional view of the present utility model;
FIG. 3 is a schematic view of an installation cross-section of the present utility model;
wherein, 1-rubber elastomer; 2-a sealing slip ring; 3-a voltage protection ring; 4-a first L-shaped retainer ring; 5-a second L-shaped retainer ring; 6-a trapezoid groove; 7-groove bottom surface; 8-a piston; 9-the inner wall surface of the cylinder; 10-a guide ring; 11-sealing the trench; 12-cylinder.
Detailed Description
As shown in fig. 1 to 2, the hydraulic support column and jack piston seal using pure water as a medium for a coal mine in this embodiment comprises a hydrolysis-resistant rubber elastomer 1, an ultra-high molecular weight polyethylene or modified polytetrafluoroethylene seal slip ring 2, a hydrolysis-resistant polyurethane seal ring 3, a first L-shaped check ring 4 of modified polyoxymethylene or polyether ether ketone, and a second L-shaped check ring 5, wherein the hydrolysis-resistant rubber elastomer 1 provides pretightening force for the ultra-high molecular weight polyethylene or modified polytetrafluoroethylene seal slip ring 2, a trapezoid groove is arranged at the outer side of the ultra-high molecular weight polyethylene or modified polytetrafluoroethylene seal slip ring 2, the hydrolysis-resistant polyurethane seal ring 3 is arranged in the trapezoid groove, and two modified polyoxymethylene or polyether ether ketone L-shaped check rings are distributed at two sides of the rubber elastomer and the ultra-high molecular weight polyethylene or modified polytetrafluoroethylene seal slip ring in a full-package manner.
The sealing slip ring 2 can also be made of any other ultra-high molecular weight polyethylene or modified polytetrafluoroethylene.
The pressure maintaining ring 3 can also be made of any other hydrolysis-resistant polyurethane.
The first L-shaped retaining ring 4 and the second L-shaped retaining ring 5 can be made of any other modified polyformaldehyde or polyether-ether-ketone material.
As shown in figure 3, when in use, the utility model is arranged in the sealing groove 11 of the piston 8 and then is filled in the cylinder barrel 12, so that the sealing slip ring is tightly attached to the utility model, the rubber elastic body 1 is compressed after the sealing slip ring 2 is extruded, the rubber elastic body 1 pre-tightening force is used for forming an initial sealing effect, meanwhile, the sealing slip ring 2 adopts ultra-high molecular weight polyethylene or modified polytetrafluoroethylene, has very good self-lubricating property, and maintains a very small friction coefficient with the inner wall 9 of the cylinder barrel even in a pure water medium environment, thereby greatly reducing the friction force and abrasion of the sealing slip ring 2 and prolonging the service life; the pressure-protecting ring 3 is made of hydrolysis-resistant polyurethane, and the excellent elastic property of the pressure-protecting ring is utilized to realize secondary sealing of the equipment in a static state. The first L-shaped retainer ring 4 and the second L-shaped retainer ring 5 can well protect the rubber elastic body 1 and the sealing slip ring 2 from extrusion damage, and the pressure resistance of the sealing slip ring 2 is greatly improved.
Claims (4)
1. The utility model provides a colliery uses hydraulic support stand and jack for medium piston seal of pure water which characterized in that: the sealing device comprises a rubber elastomer (1), a sealing slip ring (2), a pressure maintaining ring (3), a first L-shaped check ring (4) and a second L-shaped check ring (5); the rubber elastic body (1) provides pretightening force for the sealing slip ring (2), a trapezoid groove (6) is formed in the outer side of the sealing slip ring (2), the pressure maintaining ring (3) is arranged in the trapezoid groove, and the first L-shaped check ring (4) and the second L-shaped check ring (5) are distributed on two sides of the rubber elastic body (1) and the sealing slip ring (2) in a full-wrapping mode.
2. The hydraulic support upright post and jack piston seal using pure water as a medium for a coal mine according to claim 1, wherein the seal slip ring (2) is made of any ultra-high molecular weight polyethylene or modified polytetrafluoroethylene.
3. The hydraulic support upright post and jack piston seal using pure water as a medium for a coal mine according to claim 1, wherein the pressure maintaining ring (3) is made of any hydrolysis-resistant polyurethane.
4. The hydraulic support upright post and jack piston seal using pure water as a medium for a coal mine according to claim 1, wherein the first L-shaped check ring (4) and the second L-shaped check ring (5) are made of any modified polyoxymethylene or polyether ether ketone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322167776.XU CN220488270U (en) | 2023-08-14 | 2023-08-14 | Hydraulic support stand column taking pure water as medium for coal mine and piston seal for jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322167776.XU CN220488270U (en) | 2023-08-14 | 2023-08-14 | Hydraulic support stand column taking pure water as medium for coal mine and piston seal for jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220488270U true CN220488270U (en) | 2024-02-13 |
Family
ID=89833528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322167776.XU Active CN220488270U (en) | 2023-08-14 | 2023-08-14 | Hydraulic support stand column taking pure water as medium for coal mine and piston seal for jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220488270U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117782571A (en) * | 2024-02-28 | 2024-03-29 | 山西泰宝科技有限公司 | Pure water sealing simulation test bed for hydraulic support |
-
2023
- 2023-08-14 CN CN202322167776.XU patent/CN220488270U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117782571A (en) * | 2024-02-28 | 2024-03-29 | 山西泰宝科技有限公司 | Pure water sealing simulation test bed for hydraulic support |
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