CN217897899U - Equal-pressure equal-initial-supporting-force double-telescopic stand column without bottom valve - Google Patents
Equal-pressure equal-initial-supporting-force double-telescopic stand column without bottom valve Download PDFInfo
- Publication number
- CN217897899U CN217897899U CN202222308197.8U CN202222308197U CN217897899U CN 217897899 U CN217897899 U CN 217897899U CN 202222308197 U CN202222308197 U CN 202222308197U CN 217897899 U CN217897899 U CN 217897899U
- Authority
- CN
- China
- Prior art keywords
- cylinder body
- force
- rod
- piston
- hole
- 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
Images
Landscapes
- Actuator (AREA)
Abstract
The utility model discloses an isobaric equal initial supporting force bottomless valve double-telescopic upright post, which comprises a large cylinder body, a second-stage cylinder body, a third-stage cylinder body and a force-increasing rod, wherein the force-increasing rod is fixed on the second-stage cylinder body; the force-increasing rod is provided with a first through hole; the piston head of the secondary cylinder body is provided with a second through hole body; the piston head and the force-increasing rod of the large cylinder body are provided with third through holes; a fourth through hole is formed in the wall of the third-stage cylinder body; and D 1 2 ＝D 2 2 +D 3 2 ‑d 2 ，D 1 Is a large cylinder bore, D 2 Is the second-stage cylinder inner diameter D 3 The inner diameter of the three-stage cylinder body is shown, and d is the diameter of the rod part of the force-increasing rod. It can be seen that the utility model discloses do not have bottom valve device in, rely on the area difference between each cylinder body to control the action order of cylinder body, each piston rod chamber intercommunication in the cylinder body makes the pressure in each piston chamber all the same, has reduced the requirement to cylinder and sealing material.
Description
Technical Field
The utility model relates to a hydraulic support technical field especially relates to a two flexible stands of base valve are not had to initial supporting power such as isobaric.
Background
The upright column for the hydraulic support in the prior art is usually a double-telescopic upright column, the double-telescopic upright column comprises a large cylinder body, a first-stage cylinder body arranged in the large cylinder body and a piston rod arranged in the first-stage cylinder body, the first-stage cylinder body is usually provided with a bottom valve device, and when liquid is supplied, the bottom valve is opened after the pressure in the large cylinder body reaches a certain pressure, the liquid is supplied to a second-stage cylinder body, and the piston rod is pushed out. The cylinders in the double telescopic upright posts are not communicated, so that the double telescopic upright posts mainly depend on the bottom valve to control the action sequence of the cylinders, the cylinder and sealing material are required to be higher, and the manufacturing difficulty and cost are increased.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned not enough, the utility model discloses the technical problem that will solve is: the cylinder bodies are communicated, the pressure of each piston cavity is the same, the action sequence of the cylinder bodies is controlled by the area difference between the cylinder bodies, and the requirements on the cylinder barrels and sealing materials are reduced.
In order to solve the technical problem, the technical scheme of the utility model is that:
an isobaric equal-initial-supporting-force bottomless valve double-telescopic upright column comprises a large cylinder body, a secondary cylinder body arranged in the large cylinder body, a tertiary cylinder body arranged in the secondary cylinder body and a force-increasing rod, wherein the bottom end of the force-increasing rod is fixed at the bottom of the secondary cylinder body; the force increasing rod is provided with a first through hole which is communicated with a piston cavity of the large cylinder body and a piston cavity of the secondary cylinder body; a second through hole is formed in the piston head of the secondary cylinder body and is communicated with the piston cavity of the large cylinder body and the piston cavity of the secondary cylinder body; the piston head of the large cylinder body and the booster rodA third through hole is formed, and the third through hole is communicated with the piston rod cavity of the secondary cylinder body and the piston rod cavity of the tertiary cylinder body; a fourth through hole is formed in the wall of the third-stage cylinder body and is communicated with the piston rod cavity of the second-stage cylinder body and the piston rod cavity of the third-stage cylinder body; and D 1 2 ＝D 2 2 +D 3 2 -d 2 In which D is 1 Is the inner diameter of the large cylinder body, D 2 Is the inner diameter of the secondary cylinder body, D 3 Is the inner diameter of the three-stage cylinder body, and d is the rod part diameter of the force increasing rod.
Preferably, the cylinder further comprises a first guide sleeve, and the first guide sleeve is sleeved at the top end of the secondary cylinder body.
Preferably, the cylinder further comprises a second guide sleeve, and the second guide sleeve is sleeved at the top end of the third-stage cylinder body.
Preferably, a first sealing structure is arranged between the large cylinder body and the first guide sleeve and/or between the second guide sleeve and the secondary cylinder body.
Preferably, a second sealing structure is arranged between the boosting rod and the bottom end of the secondary cylinder body.
Preferably, the first sealing structure and the second sealing structure comprise a groove and a sealing ring arranged in the groove.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
because the utility model discloses an isobaric equal initial supporting force bottomless valve double-telescopic upright post, including the big cylinder body, the second-stage cylinder body arranged in the big cylinder body, the third-stage cylinder body arranged in the second-stage cylinder body, and the reinforcement rod, the bottom end of the reinforcement rod is fixed at the bottom of the second-stage cylinder body; the force increasing rod is provided with a first through hole which is communicated with a piston cavity of the large cylinder body and a piston cavity of the secondary cylinder body; a second through hole is formed in the piston head of the secondary cylinder body and is communicated with the piston cavity of the large cylinder body and the piston cavity of the secondary cylinder body; the piston head and the boosting rod of the large cylinder body are provided with third through holes, and the third through holes are communicated with a piston rod cavity of the secondary cylinder body and a piston rod cavity of the tertiary cylinder body; the cylinder wall of the third-stage cylinder body is provided with a fourth cylinder bodyThe fourth through hole is communicated with a piston rod cavity of the second-stage cylinder body and a piston rod cavity of the third-stage cylinder body; and D is 1 2 ＝D 2 2 +D 3 2 -d 2 Wherein D is 1 Is the inner diameter of the large cylinder body, D 2 Is the inner diameter of the secondary cylinder body, D 3 Is the inner diameter of the three-stage cylinder body, and d is the rod part diameter of the boosting rod. It can be seen that the utility model discloses do not have bottom valve device in, rely on the poor action order of controlling the cylinder body of area between each cylinder body, through four through-holes simultaneously, make intercommunication in the cylinder body, the pressure in each piston chamber is all the same, has reduced the requirement to cylinder and sealing material.
Because the first sealing structure is arranged between the large cylinder body and the first guide sleeve and/or between the second guide sleeve and the second-stage cylinder body, the sealing performance among the large cylinder body, the second-stage cylinder body and the third-stage cylinder body is ensured.
Because a second sealing structure is arranged between the force increasing rod and the bottom end of the secondary cylinder body, the sealing performance between the secondary cylinder body and the force increasing rod is ensured.
To sum up, the utility model solves the technical problem that the material requirement is high because the stand column is stretched and retracted by the base in the prior art; the utility model discloses do not have bottom valve device in, rely on the poor action order of controlling the cylinder body of area between each cylinder body, through four through-holes that above set up, intercommunication in the messenger cylinder body, the pressure in each piston chamber is all the same, has reduced the requirement to cylinder and sealing material.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is an enlarged partial schematic view at B of FIG. 1;
FIG. 3 is an enlarged partial schematic view at C of FIG. 1;
in the figure: the hydraulic cylinder comprises a large cylinder body 1, a secondary cylinder body 2, a tertiary cylinder body 3, a force boosting rod 4, a first guide sleeve 50, a second guide sleeve 51, a first through hole 6, a second through hole 7, a third through hole 8, a fourth through hole 9, a first sealing structure 10 and a second sealing structure 11.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1, 2 and 3, the isobaric equal initial force bottomless valve double-telescopic upright column comprises a large cylinder body 1, a secondary cylinder body 2 arranged in the large cylinder body 1, a tertiary cylinder body 3 arranged in the secondary cylinder body 2 and a force-increasing rod 4, wherein the bottom end of the force-increasing rod 4 is fixed at the bottom of the secondary cylinder body 2; the force increasing rod 4 is provided with a first through hole 6, and the first through hole 6 is communicated with a piston cavity of the large cylinder body 1 and a piston cavity of the secondary cylinder body 2; a second through hole 7 is formed in the piston head of the secondary cylinder body 2, and the second through hole 7 is communicated with the piston cavity of the large cylinder body 1 and the piston cavity of the secondary cylinder body 2; a piston head of the large cylinder body 1 and the force-increasing rod 4 are provided with a third through hole 8, the third through hole 8 is communicated with a piston rod cavity of the secondary cylinder body 2 and a piston rod cavity of the tertiary cylinder body 3, and the third through hole 8 is a long deep hole; a fourth through hole 9 is formed in the wall of the third-stage cylinder body 3, and the fourth through hole 9 is communicated with the piston rod cavity of the second-stage cylinder body 2 and the piston rod cavity of the third-stage cylinder body 3; and D is 1 2 ＝D 2 2 +D 3 2 -d 2 Wherein D is 1 Is the inner diameter (diameter) D of the large cylinder 1 2 Is the inner diameter (diameter) of the secondary cylinder 2, D 3 Is the inner diameter (diameter) of the third-stage cylinder 3, and d is the rod diameter of the booster rod 4. Wherein the formula D 1 2 ＝D 2 2 +D 3 2 -d 2 Is obtained according to the isobaric principle.
As shown in fig. 1, the present embodiment further includes a first guiding sleeve 50 and a second guiding sleeve 51, the first guiding sleeve 50 is sleeved on the top end of the secondary cylinder 2, and the second guiding sleeve 51 is sleeved on the top end of the tertiary cylinder 3. The first guide sleeve 50 and the second guide sleeve 51 reliably extend and contract the secondary cylinder 2 and the tertiary cylinder 3.
As shown in fig. 1, 2 and 3, in the present embodiment, a first sealing structure 10 is provided between the large cylinder 1 and the first guide sleeve 50 and/or between the second guide sleeve 51 and the secondary cylinder 2, and the first sealing structure 10 ensures the sealing performance among the large cylinder 1, the secondary cylinder 2 and the tertiary cylinder 3; and a second sealing structure 11 is arranged between the force increasing rod 4 and the bottom end of the secondary cylinder body 2, and the second sealing structure 11 ensures the sealing performance between the secondary cylinder body 2 and the force increasing rod 4. In a preferred embodiment, the first sealing structure 10 and the second sealing structure 11 comprise grooves and sealing rings arranged in the grooves.
The utility model discloses the setting of four through-holes makes each piston chamber intercommunication in the cylinder body for the pressure in each piston chamber is all the same, has reduced the requirement to cylinder and sealing material.
The utility model discloses a there is not bottom valve device in the cylinder body, mainly rely on the poor action order of control cylinder body of area, big cylinder piston chamber A1, second grade cylinder piston chamber A2, three chamber of tertiary cylinder piston chamber A3 communicate with each other, big cylinder piston chamber A1's area is the biggest, second grade cylinder piston chamber A2 area is the second order, tertiary cylinder piston chamber A3 area is the smallest, according to F = PS, when big cylinder piston chamber A1 supplies liquid, second grade cylinder 2 atress is the biggest, second grade cylinder 2 stretches out earlier, continue to supply liquid after reaching the maximum stroke, tertiary cylinder 3 begins to stretch out until the design stroke; when the piston cavity A3 of the third-stage cylinder body supplies liquid, because the annular area of the third-stage cylinder body is larger than that of the second-stage cylinder body 2, the third-stage cylinder body 3 is firstly withdrawn, the liquid is continuously supplied after the third-stage cylinder body is withdrawn to the stroke, and the second-stage cylinder body 2 begins to be withdrawn.
The action principle of the utility model is that: when the column is lifted, high-pressure liquid enters the large cylinder piston cavity A1 from the port P1 to push the secondary cylinder 2 to stretch out, and after the full stroke is reached, the high-pressure liquid enters the secondary cylinder piston cavity A2 through the first through hole 6 on the piston head of the secondary cylinder 2, pushes the high-pressure liquid to enter the third-stage cylinder piston cavity A3 through the third through hole 8 on the booster rod 4, and pushes the third-stage cylinder 3 to stretch out together. When the column is lowered, high-pressure liquid enters the large cylinder piston cavity A1 through the hole B, the secondary cylinder 2 and the tertiary cylinder 3 are pushed to be retracted together, and after the secondary cylinder 2 retracts in the full stroke, the high-pressure liquid entering from the second through hole 7, the third through hole 8 and the fourth through hole 9 pushes the tertiary cylinder 3 and the force-increasing rod 4 to be retracted together until the position with the shortest full stroke is retracted.
Compared with the prior art, the utility model has the advantages that the requirements on the strength, specification and welding seam of the cylinder barrel material are reduced, and the material is easier to ensure; the liquid pressure in the cylinder body is lower and basically the same as the requirement of the currently used sealing element; the lifting sequence of the upright posts is controlled by using the area difference of the cylinder body without a bottom valve.
The above is only the preferred embodiment of the present invention, and the present invention is not limited thereto, and any modification made within the spirit and principle of the present invention, or improvement of the bottom-valve-less dual telescopic column with equal pressure and other initial supporting force, should be included in the protection scope of the present invention.
Claims (6)
1. An isobaric equal-initial-supporting-force bottomless valve double-telescopic upright column comprises a large cylinder body, a secondary cylinder body arranged in the large cylinder body, a tertiary cylinder body arranged in the secondary cylinder body and a force-increasing rod, and is characterized in that the bottom end of the force-increasing rod is fixed at the bottom of the secondary cylinder body;
the boosting rod is provided with a first through hole which is communicated with a piston cavity of the large cylinder body and a piston cavity of the secondary cylinder body;
a second through hole is formed in the piston head of the secondary cylinder body, and the second through hole is communicated with the piston cavity of the large cylinder body and the piston cavity of the secondary cylinder body;
a piston head of the large cylinder body and the force boosting rod are provided with third through holes, and the third through holes are communicated with a piston rod cavity of the secondary cylinder body and a piston rod cavity of the tertiary cylinder body;
a fourth through hole is formed in the wall of the third-stage cylinder body and is communicated with the piston rod cavity of the second-stage cylinder body and the piston rod cavity of the third-stage cylinder body;
and D is 1 2 ＝D 2 2 +D 3 2 -d 2 Wherein D is 1 Is the inner diameter of the large cylinder body, D 2 Is the inner diameter of the secondary cylinder body, D 3 Is the inner diameter of the three-stage cylinder body, and d is the rod part diameter of the boosting rod.
2. The isobaric setting force bottomless valve dual telescoping mast of claim 1, further comprising a first guide sleeve sleeved at the top end of the secondary cylinder.
3. The isobaric setting force bottomless valve double-telescopic column according to claim 2, further comprising a second guide sleeve arranged at the top end of the tertiary cylinder body.
4. The isobaric equal setting force bottomless valve double telescoping column according to claim 3, characterized in that a first sealing structure is provided between the large cylinder and the first guide sleeve and/or between the second guide sleeve and the secondary cylinder.
5. The isobaric initial force bottomless valve dual telescoping mast of claim 4, characterized in that a second sealing structure is provided between the booster rod and the bottom end of the secondary cylinder.
6. The isobaric setting force bottomless valve dual telescoping mast of claim 5, wherein the first and second sealing structures comprise grooves and sealing rings disposed within the grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222308197.8U CN217897899U (en) | 2022-08-30 | 2022-08-30 | Equal-pressure equal-initial-supporting-force double-telescopic stand column without bottom valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222308197.8U CN217897899U (en) | 2022-08-30 | 2022-08-30 | Equal-pressure equal-initial-supporting-force double-telescopic stand column without bottom valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217897899U true CN217897899U (en) | 2022-11-25 |
Family
ID=84107602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222308197.8U Active CN217897899U (en) | 2022-08-30 | 2022-08-30 | Equal-pressure equal-initial-supporting-force double-telescopic stand column without bottom valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217897899U (en) |
-
2022
- 2022-08-30 CN CN202222308197.8U patent/CN217897899U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201634336U (en) | Retractable moveable tower crane | |
| CN217897899U (en) | Equal-pressure equal-initial-supporting-force double-telescopic stand column without bottom valve | |
| WO2022100284A1 (en) | Piston rod of telescopic oil cylinder, telescopic oil cylinder, and crane | |
| CN102691692A (en) | Multi-stage pressure composite cylinder | |
| CN201650181U (en) | Expansion pipe assembly and driving mechanism thereof | |
| CN200988483Y (en) | Oil cylinder with support leg | |
| CN201650314U (en) | Telescopic upright | |
| CN101737294A (en) | Inflator of racing bicycle | |
| CN205154803U (en) | Multistage synchronous telescope pneumatic cylinder | |
| CN114876911A (en) | Three-stage synchronous telescopic hydraulic oil cylinder | |
| CN201599165U (en) | Inflator for racing vehicles | |
| CN115434975A (en) | Novel erecting oil cylinder | |
| CN202510455U (en) | Multistage pressure compound cylinder | |
| CN110529061B (en) | Gradual deblocking expansion device | |
| CN202971389U (en) | Oil cylinder and multi-cylinder multi-stage telescopic arm serving as oil conveying pipe | |
| CN207748810U (en) | A kind of supporting leg control mechanism and its control system | |
| CN102536274A (en) | Equipressure double-telescopic prop | |
| CN112594251B (en) | Synchronous telescopic multi-stage cylinder with auxiliary cylinder | |
| CN218509858U (en) | Three-stage equal-thrust hydraulic cylinder | |
| CN205838404U (en) | Lorry-mounted crane more piece nested type big elevating height Telescopic support leg device | |
| CN217152496U (en) | Quick synchronous multistage jar | |
| CN217682570U (en) | Three-stage synchronous telescopic hydraulic oil cylinder | |
| CN209797362U (en) | Horizontal and vertical double-purpose large-stroke jack | |
| CN217682571U (en) | Multistage hydraulic cylinder with controllable telescopic sequence | |
| CN212832544U (en) | Ultrathin large-stroke self-locking hydraulic jack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |