CN108590718B - Column shrinkage-proof valve - Google Patents
Column shrinkage-proof valve Download PDFInfo
- Publication number
- CN108590718B CN108590718B CN201810418609.9A CN201810418609A CN108590718B CN 108590718 B CN108590718 B CN 108590718B CN 201810418609 A CN201810418609 A CN 201810418609A CN 108590718 B CN108590718 B CN 108590718B
- Authority
- CN
- China
- Prior art keywords
- valve
- external connection
- communicated
- connection hole
- hydraulic control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 239000000839 emulsion Substances 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 230000002265 prevention Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
- E21D15/512—Arrangement of valves
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Safety Valves (AREA)
- Check Valves (AREA)
Abstract
The invention discloses an upright post shrinkage-stopping valve which comprises a valve casing, a valve seat, a safety valve, a hydraulic control one-way valve, a channel and a second channel, wherein the valve seat is connected with the valve casing, the safety valve is screwed in an inner hole of the valve seat and is fastened in the valve casing, the hydraulic control one-way valve is fastened on the valve casing through bolts, three sealing rings are arranged at a joint surface of the hydraulic control one-way valve and the valve casing, the end of the channel is communicated with the safety valve, the other end of the channel is communicated with the hydraulic control one-way valve through a opening hole, the external connection hole is formed in the valve casing, the external connection hole is communicated with the second channel, the second channel is communicated with the external connection hole, and the second channel is communicated with the hydraulic control one-way valve through a second opening hole.
Description
Technical Field
The invention belongs to the technical field of coal mine machinery, and relates to upright post shrinkage-stopping valves.
Background
After a fully-mechanized mining hydraulic support for coal mining support is operated for a long time and under a large load, the problem that piston sealing of a large upright post generates internal leakage due to abrasion often occurs, the problem that cylinder abrasion increases to generate internal leakage also occurs, the supporting capacity of the hydraulic support is reduced, the problem is solved that the large upright post is completely replaced, and the large upright post needs to be replaced on site, so that the potential safety hazards are high, and the labor intensity is high.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is already known to a person skilled in the art .
Disclosure of Invention
The invention aims to provide upright post shrinkage-stopping valves, so that the problems that a piston of a large upright post in the prior art is easy to wear, and has many potential safety hazards and high labor intensity during field replacement are solved.
The invention provides an upright post shrinkage-stopping valve which comprises a valve casing, a valve seat, a safety valve, a hydraulic control one-way valve, a channel, a end of the channel is communicated with the safety valve, the other end of the channel is communicated with the hydraulic control one-way valve through a opening hole, a external connection hole, a external connection hole is formed in the valve casing, and a second channel is communicated with the external connection hole and communicated with the hydraulic control one-way valve through a second opening hole.
in a preferred embodiment, the shaft check valve further includes a second external port disposed on the valve housing, and a third passage communicating with the second external port and communicating with the pilot operated check valve through a third opening.
A preferred embodiment, the pilot operated check valve includes a plug disposed on the side of the pilot operated check valve with an orifice disposed therein.
in a preferred embodiment, the valve seat includes a th screw thread, th screw thread is arranged inside the valve seat, an inner hole is matched with the safety valve, a second screw thread is arranged outside the valve seat and is matched with the interface screw thread of the valve shell, an annular groove is arranged outside the valve seat and is used for accommodating the sealing ring, and a fourth opening is formed between the annular groove and the bottom of the th screw thread.
In , the th external connection hole is communicated with the upper cavity interface of the big column to be prevented from shrinking, the th external connection hole is communicated with the second opening hole in the hydraulic control one-way valve through the fifth opening hole and the second channel, the second external connection hole is communicated with the lower cavity interface of the operating valve of the big column to be prevented from shrinking, and the second external connection hole is communicated with the third opening hole in the hydraulic control one-way valve through the third channel.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides upright post shrinkage-stopping valves, which improve the one-way shrinkage prevention of the original upright post into two-way shrinkage prevention by utilizing the check function of the upright post shrinkage-stopping valve and the passing characteristic of the working fluid exceeding the rated pressure, and improve the double-acting oil cylinder of the original upright post into a special oil cylinder which is used by both a double-acting oil cylinder and a single-acting oil cylinder, thereby preventing the problems of the increase of the abrasion of a cylinder barrel of a large upright post and the generation of internal leakage caused by the abrasion of the cylinder barrel, eliminating the working link of replacing the large upright post on site, saving manpower and material resources, and fundamentally solving the problems of the generation of internal leakage caused by the abrasion of a piston seal of the large upright post and the generation of internal.
Drawings
Fig. 1 is a schematic sectional view of the structure of a post shrinkage prevention valve according to the present invention.
Fig. 2 is a schematic cross-sectional structural view of a valve seat according to the present invention.
Fig. 3 is a schematic diagram of a hydraulic system provided with a mast pinch stop valve according to the present invention.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
As shown in fig. 1-2, the shaft shrinkage-preventing valve according to the preferred embodiment of the present invention comprises th passage 2, a valve housing 3, a second passage 6, a relief valve 7, a valve seat 8, a th external connection hole 10 and a pilot operated check valve 13, wherein the valve housing 3 is connected with the valve seat 8, the relief valve 7 is screwed in an inner hole 24 of the valve seat 8, the relief valve 7 is fastened in the valve housing 3 and is respectively assembled with a seal A, B and a c at each gap generating a pressure difference, the pilot operated check valve 13 is fastened on the valve housing 3 by bolts 16, three sealing rings d are arranged at a joint surface of the pilot operated check valve 13 and the valve housing 3, a end of the th passage 2 is communicated with the relief valve 7, another end of the th passage 2 is communicated with the pilot operated check valve 13 through a opening 1, a th external connection hole 10 is arranged on the valve housing 3, the second passage 6 is communicated with the th external connection hole 10, and the second passage 6 is communicated.
In the scheme, the column shrinkage-stopping valve further comprises a second external connection hole 4 and a third channel 5, wherein the second external connection hole 4 is arranged on the valve shell 3, the third channel 5 is communicated with the second external connection hole 4, the third channel 5 is communicated with the hydraulic control one-way valve 13 through a third opening 14, the hydraulic control one-way valve 13 comprises a plug 11, the plug 11 is arranged on the side of the hydraulic control one-way valve 13, a throttling hole 12 is formed in the plug 11, the opening of the one-way valve in the hydraulic control one-way valve 13 is controlled by using overpressure leakage liquid of the safety valve 7, and the leakage of the throttling hole 12 is used for returning the one-way valve, so that column shrinkage-stopping valves capable of ensuring that a large column with a piston sealing leakage fault does not descend are formed, and the small piston is returned due to residual pressure of emulsion liquid existing between the plug 11 and the small piston when pressure oil supply is stopped, and accordingly the oil inside connection holes of the second external connection hole 4 and the second channel 6 are locked.
The valve seat 8 comprises th threads 19, th threads 20, a fourth opening 21, a ring groove 22 and an inner hole 24, wherein the th threads 19 are arranged inside the valve seat, the inner hole 24 is matched with the relief valve 7, the outer diameter of the inner hole 24 is matched with the relief valve 7, and the leakage of the gap is eliminated through a seal B, the second threads 20 are arranged outside the valve seat 8, the second threads 20 are matched with the interface threads of the valve housing 3, the ring groove 22 is arranged outside the valve seat 8, the ring groove 22 is used for accommodating a sealing ring and eliminating the leakage at the gap through a seal C assembled at the ring groove 22, the fourth opening 21 is processed between the ring groove 33 and the bottom of the th threads 19, the th opening 10 is communicated with the upper cavity interface of the large hydraulic control column which is stopped to shrink, the th opening 10 is communicated with the second opening 15 in the check valve 13 through a fifth opening 18 and a second passage 6, the second opening 4 is communicated with the lower cavity interface of the large hydraulic control column which is stopped to shrink, and the second opening 4 is communicated with the third opening 14 of the check valve through a third passage 5.
The working principle of the column retraction-preventing valve of the invention is that as shown in fig. 3, a column retraction-preventing valve 111 is connected in series between an upper cavity interface 112 and an operation valve interface 113 of a large column, and the operation valve is operated to reciprocate, so that the large column can be lifted and lowered, and the column can work under three conditions, (1) when the column generates an internal leakage condition, the piston is contracted and moved down, the leaked emulsion enters a hydraulic control one-way valve 13 through the upper cavity interface of the large column and a second external connection hole 10, because no hydraulic pressure exists in a third channel 5 connected with a second external connection hole 4, the one-way valve in the hydraulic control one-way valve 13 cannot be opened, the leaked emulsion is locked and cannot flow back, so that the piston stops retracting and generates a supporting force, (2) when the column generates the internal leakage and enters a lifting condition, because the one-way valve in the hydraulic control one-way valve 13 cannot be opened, the leaked emulsion is locked and cannot flow back, the column can generate an upward supporting force with the effective supporting area of the column piston rod, but when the column generates the internal leakage enters the lifting condition, the large column, the initial supporting force is reduced by 12% (3), the one-way valve cannot be opened, the leaked emulsion can be locked and cannot flow back into a third channel 2, the column, the piston can be pushed into a third channel 9, the piston can be pushed back to the piston 2, the piston can be pushed to the second external opening hole, the piston 2, the piston can be pushed by the piston 2, the piston after the piston moves to the piston 2, the piston rod, the piston moves to the piston 2, the piston moves to the piston to the second external connection hole, the piston 2, the second external connection hole, the piston 9, the.
The column shrinkage-stopping valve of the invention has a non-return function to the emulsion in the upper cavity of the column and also has the characteristic of passing through the column under the pressure exceeding the rated pressure, so that the column shrinkage-stopping valve can recover the use of the column with internal leakage generated at the sealing position of the piston and can be matched with a complete large column for use.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (3)
1, kinds of stand column check valve that contracts, characterized by, the stand column check valve includes:
a valve housing;
a valve seat connected with the valve housing;
the safety valve is screwed in the inner hole of the valve seat and is fastened in the valve shell;
the hydraulic control one-way valve is fastened on the valve casing through bolts, and three sealing rings are arranged at the joint surface of the hydraulic control one-way valve and the valve casing;
an th passage, the end of the th passage communicating with the relief valve, the other end of the th passage communicating with the pilot operated check valve through a th orifice;
external connection hole, wherein the external connection hole is arranged on the valve shell;
a second passage in communication with said outer port, said second passage in communication with said pilot operated check valve through a second opening;
the second external connection hole is arranged on the valve shell; and
the third channel is communicated with the second external connection hole and communicated with the hydraulic control one-way valve through a third opening;
the external connection hole is communicated with an upper cavity interface of the large column which is prevented from shrinking, the external connection hole is communicated with the second opening hole in the hydraulic control one-way valve through a fifth opening hole and a second channel, the second external connection hole is communicated with a lower cavity interface of an operating valve of the large column which is prevented from shrinking, and the second external connection hole is communicated with the third opening hole in the hydraulic control one-way valve through the third channel.
2. The mast retraction-stop valve according to claim 1, wherein the pilot operated check valve comprises a plug disposed on the side of the pilot operated check valve, an orifice being disposed in the plug.
3. The post thrust valve of claim 1, wherein said valve seat comprises:
th threads, the th threads being disposed inside the valve seat;
the inner hole is matched with the safety valve;
the second thread is arranged on the outer side of the valve seat and is matched with the interface thread of the valve shell;
the annular groove is formed in the outer side of the valve seat and used for accommodating a sealing ring; and
a fourth opening machined between the ring groove and a bottom of the th thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810418609.9A CN108590718B (en) | 2018-05-04 | 2018-05-04 | Column shrinkage-proof valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810418609.9A CN108590718B (en) | 2018-05-04 | 2018-05-04 | Column shrinkage-proof valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108590718A CN108590718A (en) | 2018-09-28 |
| CN108590718B true CN108590718B (en) | 2020-01-31 |
Family
ID=63619751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810418609.9A Active CN108590718B (en) | 2018-05-04 | 2018-05-04 | Column shrinkage-proof valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108590718B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19813909B4 (en) * | 1998-03-28 | 2007-02-15 | Dbt Gmbh | Hydraulically actuated non-return valve for the removal hydraulics in mining underground operations |
| CN202064971U (en) * | 2011-05-09 | 2011-12-07 | 巨隆集团芜湖兴隆液压有限公司 | Plug-in medium flow column pilot operated check valve |
| CN102191944A (en) * | 2011-05-09 | 2011-09-21 | 巨隆集团芜湖兴隆液压有限公司 | Inserted medium flow upright post hydraulic control one-way valve |
| CN204002865U (en) * | 2014-08-21 | 2014-12-10 | 浙江衢州巨升煤矿机械有限公司 | A kind of hydraulic control one-way valve and the hydraulic support column column cap being mated |
| CN107882817A (en) * | 2016-09-30 | 2018-04-06 | 王换春 | A kind of fluid pressure type reversible lock |
| CN207278280U (en) * | 2017-09-18 | 2018-04-27 | 巨隆集团芜湖兴隆液压有限公司 | Hydraulic control one-way valve |
-
2018
- 2018-05-04 CN CN201810418609.9A patent/CN108590718B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108590718A (en) | 2018-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103603975B (en) | Multistage hydraulic cylinder | |
| CN102400975B (en) | Secondary stretching and retracting hydraulic cylinder and hydraulic equipment | |
| CN112228005B (en) | Low setting force bridge plug capable of fishing for well lifting and pressure relief | |
| US5509513A (en) | Bidirectional snubber for a hydraulic suspension cylinder | |
| CN204226320U (en) | Equilibrium valve and truck crane | |
| CN202381448U (en) | Hydraulic oil cylinder and hydraulic system | |
| CN108590718B (en) | Column shrinkage-proof valve | |
| CN107120333A (en) | Self-locking hydraulic cylinder on lowering or hoisting gear | |
| CN105201942A (en) | Balance valve and automobile crane | |
| CN202326508U (en) | Two-level telescopic hydraulic cylinder and hydraulic equipment | |
| CN206988206U (en) | Lever formula expansion isolating type oil well elevating ram | |
| CN116066445A (en) | Balance type leakless low friction hydraulic cylinder | |
| CN103899594B (en) | Internal expansion type locking cylinder manualemergency operating device and method | |
| CN206530567U (en) | Hydraulic cylinder | |
| CN213954054U (en) | Mining hydraulic cylinder with structure changed and thrust increased | |
| CN204492743U (en) | Withstand voltage high temperature resistant pair of packing-element releasing packer | |
| CN104196714B (en) | Oil field plunger oil-well pump Dynamic Seal combination plunger assembly | |
| CN204300013U (en) | A kind of hydraulic jack | |
| CN104454761A (en) | Double-acting single-piston-rod hydraulic cylinder | |
| CN202144811U (en) | Self-locking type hydraulic oil cylinder | |
| RU216673U1 (en) | DOUBLE ACTING HYDRO CYLINDER | |
| CN206571764U (en) | Anti-leak piston bar | |
| CN107152544B (en) | Oil injection float valve for petroleum drilling | |
| CN113757215A (en) | Safety relief valve for piston type double-acting hydraulic cylinder or hydraulic jack | |
| CN204002708U (en) | A kind of shock resistance pressure bearing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |