CN201236713Y - Improved single-body hydraulic supporter - Google Patents
Improved single-body hydraulic supporter Download PDFInfo
- Publication number
- CN201236713Y CN201236713Y CNU2008200210692U CN200820021069U CN201236713Y CN 201236713 Y CN201236713 Y CN 201236713Y CN U2008200210692 U CNU2008200210692 U CN U2008200210692U CN 200820021069 U CN200820021069 U CN 200820021069U CN 201236713 Y CN201236713 Y CN 201236713Y
- Authority
- CN
- China
- Prior art keywords
- oil cylinder
- hydraulic prop
- plunger tube
- sealing ring
- super wide
- 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.)
- Expired - Fee Related
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Abstract
The utility model provides an improved-type single hydraulic prop, which comprises an oil cylinder, a moveable column casing and a return spring, and is characterized in that a super-wide seal ring is directly mounted on the moveable column casing which is matched with the oil cylinder; a return spring-hanging cross rod is fixed on the bottom part of the moveable column casing and in the oil cylinder; and the return spring is hung on the spring-hanging cross rod. The single hydraulic prop has the advantages that no piston is used, the design is novel, the structure is simple, the manufacturing cost is low and the weight is light; and not only the sealing effect is good, and the support is steady, but also the service life is long.
Description
Technical field: the utility model belongs to mining support apparatus technical field, relates to a kind of hydraulic prop.
Background technology: hydraulic prop is one of requisite support apparatus of coal mining work plane.Since promoting the use of, its form of structure, never too big variation, particularly supporting height are in the outside injection type hydraulic pillar more than 2.8 meters.In the prior art, it mainly is made up of critical pieces such as top cover, little column cap, handgrip body, oil cylinder, plunger tube, back-moving spring, piston, big column cap, extension spray lance, bases.Its operating principle by little column cap, go up triple-use valve, oil cylinder, plunger tube, piston, big column cap, down triple-use valve, form the annular seal space of a variable-volume.During operation, the high-pressure emulsion of carrying from pumping plant passes through the variable annular seal space of above-mentioned each part composition of triple-use valve arrival down, annular seal space volume increase this moment, and plunger tube rises, the shore supports top board; When post fell in pillar, high-pressure emulsion oppositely overflowed, and variable annular seal space diminishes, and plunger tube reduces, the pillar withdrawal.The problem that this hydraulic prop exists in actual applications is: 1. complex structure, and the cost height, weight is big; 2. be to adopt y-shaped ring between piston and oil cylinder, sealing surface is narrow, and sealing effectiveness is poor, during situations such as pit that on running into oil cylinder, in use produces or hot spot, often can not seal, often cause the decompression phenomenon and the formation accident, thereby application life be also shorter.In addition, on hydraulic prop, the use that also has super wide sealing ring, but the super wide sealing ring of prior art, the one, thickness is bigger, is generally 10mm, can only be installed on the piston to use, and can not be directly installed on the plunger tube, can not save piston; The 2nd, highly less, be generally 10mm, sealing effectiveness is poor.
Summary of the invention: the novel purpose of this use is for overcoming the above-mentioned deficiency of existing in prior technology, and provides a kind of simple in structure, and in light weight, stability of strutting system is good, the hydraulic prop of long service life.The purpose of this utility model is to improve to realize that it comprises oil cylinder, plunger tube and back-moving spring, it is characterized in that directly being equipped with on the plunger tube liquid-filled super wide sealing ring, and matches with oil cylinder on the basis of prior art hydraulic prop; The plunger tube bottom is fixed with back-moving spring and hangs cross bar in the oil cylinder, said back-moving spring is placed in this and hangs on the cross bar.
The novel piston that do not use of this use, modern design, simple in structure, cost is low, and is in light weight; And good sealing effect not only, supporting ﹠ stablizing, and long service life.
Description of drawings: Fig. 1 looks main TV structure schematic diagram of the present utility model
Fig. 2 is the A portion partial enlarged drawing among Fig. 1
The specific embodiment: accompanying drawing has provided specific embodiment of the utility model.
According to Fig. 1, shown in Figure 2,7 is plunger tubes among the figure, and super wide sealing ring 4 directly is installed on the plunger tube 7, matches with oil cylinder 6; Plunger tube 7 bottoms are fixed with back-moving spring and hang cross bar 3 in the oil cylinder 6, back-moving spring 5 is placed in this and hangs on the cross bar 3.When injecting high-pressure emulsion by triple-use valve 1, the last hole of high-pressure emulsion by this triple-use valve valve pocket 2 enters the variable spaces that the exhaust end cap 8 by triple-use valve valve pocket 2, oil cylinder 6, base, plunger tube 7 and plunger tube 7 upper ends constitutes, this variable spaces is enlarged, plunger tube rises, thereby realizes a top effect of pillar.
In order further to improve the sealing effectiveness between plunger tube and the oil cylinder, the super wide sealing ring preferred thickness of above-mentioned said little thickness is 5.5mm, highly is 25mm.Said super wide sealing ring is preferably liquid-filled sealing ring.
Claims (3)
1, a kind of modified hydraulic prop comprises oil cylinder (6), plunger tube (7) and back-moving spring (5), it is characterized in that directly being equipped with on the plunger tube (7) super wide sealing ring (4), and matches with oil cylinder (6); The bottom of plunger tube (7) is fixed with back-moving spring and hangs cross bar (3) in the oil cylinder (6), said back-moving spring (5) is placed in this and hangs on the cross bar (3).
2, hydraulic prop according to claim 1 is characterized in that said super wide sealing ring thickness is 5.5mm, highly is 25mm.
3, hydraulic prop according to claim 1 and 2 is characterized in that said super wide sealing ring is liquid-filled super wide sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200210692U CN201236713Y (en) | 2008-04-17 | 2008-04-17 | Improved single-body hydraulic supporter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200210692U CN201236713Y (en) | 2008-04-17 | 2008-04-17 | Improved single-body hydraulic supporter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201236713Y true CN201236713Y (en) | 2009-05-13 |
Family
ID=40649452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200210692U Expired - Fee Related CN201236713Y (en) | 2008-04-17 | 2008-04-17 | Improved single-body hydraulic supporter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201236713Y (en) |
-
2008
- 2008-04-17 CN CNU2008200210692U patent/CN201236713Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090513 Termination date: 20140417 |