CN201844012U - Waterproof oil sealing device for piston rod of concrete pumping hydraulic oil cylinder - Google Patents
Waterproof oil sealing device for piston rod of concrete pumping hydraulic oil cylinder Download PDFInfo
- Publication number
- CN201844012U CN201844012U CN201020529166XU CN201020529166U CN201844012U CN 201844012 U CN201844012 U CN 201844012U CN 201020529166X U CN201020529166X U CN 201020529166XU CN 201020529166 U CN201020529166 U CN 201020529166U CN 201844012 U CN201844012 U CN 201844012U
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- guide sleeve
- end cap
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- piston rod
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Abstract
The utility model discloses a waterproof oil sealing device for a piston rod of a concrete pumping hydraulic oil cylinder, which belongs to sealing equipment. The waterproof oil sealing device is characterized in that a gland is divided into a left end cover and a right guiding sleeve, the end cover is a stepped cylinder with a central hole, the guiding sleeve is a stepped cylinder with a stepped central through hole, a right stepped section of the end cover is inserted into the inner circumference of a left section of the guiding sleeve, a central through hole of the right section of the guiding sleeve is in sliding fit with the piston rod, oil inlet ducts communicated with a step surface of the central through hole of the guiding sleeve are circumferentially uniformly arranged on the circumferential surface of a middle stepped section on the right side of the guiding sleeve, V-shaped seal rings which are sleeved with each other in a stacking manner are mounted in a space between the right stepped section of the end cover and a central through hole of the right section of the guiding sleeve from left to right, connecting bolts are penetratingly mounted to integrally connect the end cover with the guiding sleeve, and a drainage duct communicated with a drainage circular groove is disposed on the lower side of the end cover. Accordingly, the end cover is used for waterproofing, the guiding sleeve is used for preventing oil, and the waterproof oil sealing device is safe and reliable in use and has excellent sealing performance.
Description
Technical field
The utility model belongs to seal arrangement, especially relates to a kind of seal arrangement of concrete pumping hydraulic jack.
Background technique
In concrete pump, its oil cylinder piston bar is under water, when piston rod bounces back, easily water is brought in the hydraulic oil, at this problem, the now normal way that adopts is: between the gland of hydraulic jack and piston rod seal ring is installed and is come oil sealing, in addition, two adjacent and dust rings that lip is inside are installed between the end of gland and piston rod, a back-up ring is housed between two dust rings, form oil pocket between back-up ring and the dust ring, form cavity between piston rod and the back-up ring, oil pocket is pressed to piston rod from outside cut-in pressure oil with the lip limit of two dust rings, and is provided with air vent above gland, one end of air vent communicates with atmosphere, and the other end communicates with cavity; Be provided with discharge channel below gland, an end of discharge channel communicates with atmosphere, and the other end communicates with cavity, comes draining like this; In this case, on the one hand the empty G﹠W intersection in air vent is easy to get rusty, and air vent upwards can be fallen into booty; Come oil sealing by seal ring on the other hand, effect is good inadequately, draws pressure oil simultaneously from the outside to oil pocket structure more complicated.
Summary of the invention
The purpose of this utility model provides a kind of waterproof oil sealer of concrete pumping hydraulic cylinder piston rod, not only rational in infrastructure, safe and reliable, and possess excellent sealing performance, both hydraulic oil was sealed, and solved water again effectively and enter problem in the hydraulic oil.
The purpose of this utility model is achieved like this: a kind of waterproof oil sealer of concrete pumping hydraulic cylinder piston rod, comprise gland, piston rod, left side dust ring, right dust ring and support ring, it is characterized in that: gland is divided into the end cap in left side and the guide sleeve two-part on right side, end cap is the step cylindrical body of band center hole, on the stage casing of end cap, have annular convex shoulder, and the left side section of end cap is the little left step section of external diameter, the right section of end cap also is the little right step section of external diameter, the center hole and the piston rod of this end cap are slidingly matched, left part and middle part at the center hole of end cap are offered annular groove and corresponding left dust ring and the right dust ring installed respectively, on the center hole section between left dust ring and the right dust ring, offer the draining annular groove, offer annular groove at the right part of end cap central bore support ring is installed; Guide sleeve is the step cylindrical body that has the step type central through bore, on the left end section of guide sleeve, have annular convex shoulder, in the left side of this annular convex shoulder is the little left step section of external diameter, and on the right side of this annular convex shoulder external diameter from large to small three step sections successively from left to right, the left side section diameter of guide sleeve central through bore is big and right section diameter is little, the periphery of the central through bore that the left side section diameter of guide sleeve is big and the right step section of end cap is slidingly fitted, the right step section that is end cap is inserted in the left side section internal diameter of guide sleeve, and the central through bore and the piston rod of the right section of guide sleeve are slidingly fitted, the compartment of terrain is offered annular groove and support ring is installed respectively on the inner peripheral surface of the right section of guide sleeve central through bore, and circumference uniform distribution is offered the oil-feed duct that communicates with the step surface of guide sleeve central through bore on the outer peripheral surface in way station stage on guide sleeve right side; After among the central through bore of the right step section insertion guide sleeve left side section of end cap, in the space between the section central through bore of the left side of the right step section of end cap and guide sleeve nestable v-ring mutually is installed from left to right, in addition, on the left step section of the annular convex shoulder of end cap and guide sleeve, equal circumference uniform distribution offers screw and correspondence installs connecting bolt, end cap and guide sleeve are fused, the mounting platform of annular is installed on the annular convex shoulder of guide sleeve, below end cap, offer the draining duct that communicates with the draining annular groove, and make the other end in this draining duct pass end cap, communicate with atmosphere behind annular convex shoulder on the guide sleeve and the mounting platform.
Like this, end cap is used for waterproof, and guide sleeve is used for grease proofing; After left side dust ring was hung the most of water on the piston rod, the water of small part was scraped by right dust ring; The draining duct is very short, can be extruded the draining duct to the water of depositing in the draining duct by the water that right dust ring scrapes off; Attract pressure oil and be pressed on the piston rod through the lip limit of the oil-feed duct on the guide sleeve with each V-shaped seal ring from oil cylinder, it is tight more that big more lip of oil cylinder internal pressure and piston rod are fitted, and can replenish automatically when V-shaped seal ring has wearing and tearing, and oil sealing is more effective.
The waterproof oil sealer of the concrete pumping hydraulic cylinder piston rod that the utility model proposed, rational in infrastructure, safe and reliable, possess excellent sealing performance, both hydraulic oil was sealed, solve water again effectively and entered problem in the hydraulic oil.
Now in conjunction with the accompanying drawings and embodiments the waterproof oil sealer of the concrete pumping hydraulic cylinder piston rod that the utility model proposed is described further.
Description of drawings
Fig. 1 is the main cross-sectional schematic of the waterproof oil sealer of the concrete pumping hydraulic cylinder piston rod that the utility model proposed.
Among Fig. 1:
1, gland 2, piston rod 3, left dust ring 4, right dust ring 5, draining annular groove 6, end cap 7, guide sleeve 8, draining duct 9, support ring 10, v-ring 11, oil-feed duct 12, mounting platform 13, connecting bolt
Embodiment
By among Fig. 1 as can be seen: a kind of waterproof oil sealer of concrete pumping hydraulic cylinder piston rod, comprise gland 1, piston rod 2, left side dust ring 3, right dust ring 4 and support ring 9, it is characterized in that: gland 1 is divided into the end cap 6 in left side and guide sleeve 7 two-part on right side, end cap 6 is the step cylindrical body of band center hole, stage casing at end cap 6 has annular convex shoulder, and the left side section of end cap 6 is the little left step section of external diameter, the right section of end cap 6 also is the little right step section of external diameter, the center hole of this end cap 6 and piston rod 2 are slidingly matched, left part and middle part at the center hole of end cap 6 are offered annular groove and corresponding left dust ring 3 and the right dust ring 4 installed respectively, on the center hole section between left dust ring 3 and the right dust ring 4, offer draining annular groove 5, offer annular groove at the right part of end cap 6 center holes support ring 9 is installed; Guide sleeve 7 is for having the step cylindrical body of step type central through bore, on the left end section of guide sleeve 7, have annular convex shoulder, in the left side of this annular convex shoulder is the little left step section of external diameter, and on the right side of this annular convex shoulder external diameter from large to small three step sections successively from left to right, the left side section diameter of the central through bore of guide sleeve 7 is big and right section diameter is little, the periphery of the central through bore that the left side section diameter of guide sleeve 7 is big and the right step section of end cap 6 is slidingly fitted, the right step section that is end cap 6 is inserted in the left side section internal diameter of guide sleeve 7, and the central through bore and the piston rod 2 of guide sleeve 7 right sections are slidingly fitted, the compartment of terrain is offered annular groove and support ring 9 is installed respectively on the inner peripheral surface of the right section central through bores of guide sleeve 7, and circumference uniform distribution is offered the oil-feed duct 11 that communicates with the step surface of guide sleeve 7 central through bores on the outer peripheral surface in way station stage on guide sleeve 7 right sides; After among the central through bore of right step section insertion guide sleeve 7 left side sections of end cap 6, in the space between the section central through bore of the left side of the right step section of end cap 6 and guide sleeve 7 nestable v-ring 10 mutually is installed from left to right, in addition, on the left step section of the annular convex shoulder of end cap 6 and guide sleeve 7, equal circumference uniform distribution offers screw and correspondence installs connecting bolt 13, end cap 6 and guide sleeve 7 are fused, the mounting platform 12 of annular is installed on the annular convex shoulder of guide sleeve 7, below end cap 6, offer the draining duct 8 that communicates with draining annular groove 5, and make the other end in this draining duct 8 pass end cap 6, the annular convex shoulder of guide sleeve 7 and mounting platform 12 backs communicate with atmosphere.
Like this, end cap 6 is used for waterproof, guide sleeve 7 is used for grease proofing, after left side dust ring 3 is hung the most of water on the piston rod 2, the water of small part is scraped by right dust ring 4, draining duct 8 is very short, can be extruded draining duct 8 to the 8 li water deposited in draining duct by the water that right dust ring 4 scrapes off, attracting pressure oil from oil cylinder is pressed in the lip limit of each V-shaped seal ring 10 on the piston rod 2 through the oil-feed duct 11 on the guide sleeve 7, the oil cylinder internal pressure is big more, it is tight more that this lip and piston rod 2 are fitted, and can replenish automatically when V-shaped seal ring 10 has wearing and tearing, and oil sealing is more effective.
Claims (1)
1. the waterproof oil sealer of a concrete pumping hydraulic cylinder piston rod comprises gland (1), piston rod (2), left dust ring (3), right dust ring (4) and support ring (9), it is characterized in that:
A, gland (1) is divided into the end cap (6) in left side and guide sleeve (7) two-part on right side, end cap (6) is the step cylindrical body of band center hole, on the stage casing of end cap (6), have annular convex shoulder, and the left side section of end cap (6) is the little left step section of external diameter, the right section of end cap (6) also is the little right step section of external diameter, center hole of this end cap (6) and piston rod (2) are slidingly matched, left part and middle part at the center hole of end cap (6) are offered annular groove and corresponding left dust ring (3) and the right dust ring (4) installed respectively, on the center hole section between left dust ring (3) and the right dust ring (4), offer draining annular groove (5), offer annular groove at the right part of end cap (6) center hole support ring (9) is installed;
B, guide sleeve (7) is for having the step cylindrical body of step type central through bore, on the left end section of guide sleeve (7), have annular convex shoulder, in the left side of this annular convex shoulder is the little left step section of external diameter, and on the right side of this annular convex shoulder external diameter from large to small three step sections successively from left to right, the left side section diameter of the central through bore of guide sleeve (7) is big and right section diameter is little, the periphery of the central through bore that the left side section diameter of guide sleeve (7) is big and the right step section of end cap (6) is slidingly fitted, the right step section that is end cap (6) is inserted in the left side section internal diameter of guide sleeve (7), and the central through bore and the piston rod (2) of the right section of guide sleeve (7) are slidingly fitted, the compartment of terrain is offered annular groove and support ring (9) is installed respectively on the inner peripheral surface of the right section of guide sleeve (7) central through bore, and circumference uniform distribution is offered the oil-feed duct (11) that communicates with the step surface of guide sleeve (7) central through bore on the outer peripheral surface in way station stage on guide sleeve (7) right side;
C, after among the central through bore of right step section insertion guide sleeve (7) left side section of end cap (6), in the space between the section central through bore of the left side of the right step section of end cap (6) and guide sleeve (7) nestable v-ring (10) mutually is installed from left to right, in addition, on the left step section of the annular convex shoulder of end cap (6) and guide sleeve (7), equal circumference uniform distribution offers screw and correspondence installs connecting bolt (13), end cap (6) and guide sleeve (7) are fused, the mounting platform (12) of annular is installed on the annular convex shoulder of guide sleeve (7), offer the draining duct (8) that communicates with draining annular groove (5) in the below of end cap (6), the other end in this draining duct (8) passes end cap (6), the annular convex shoulder of guide sleeve (7) and mounting platform (12) back communicate with atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020529166XU CN201844012U (en) | 2010-09-09 | 2010-09-09 | Waterproof oil sealing device for piston rod of concrete pumping hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020529166XU CN201844012U (en) | 2010-09-09 | 2010-09-09 | Waterproof oil sealing device for piston rod of concrete pumping hydraulic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201844012U true CN201844012U (en) | 2011-05-25 |
Family
ID=44038904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020529166XU Expired - Fee Related CN201844012U (en) | 2010-09-09 | 2010-09-09 | Waterproof oil sealing device for piston rod of concrete pumping hydraulic oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201844012U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013056544A1 (en) * | 2011-10-19 | 2013-04-25 | 湖南三一智能控制设备有限公司 | Sealing structure of hydraulic cylinder |
| CN103452953A (en) * | 2013-09-05 | 2013-12-18 | 中联重科股份有限公司 | Hydraulic oil cylinder, waterproof system thereof and concrete pumping device |
| CN105298976A (en) * | 2015-10-12 | 2016-02-03 | 江苏恒立高压油缸股份有限公司 | Crusher cylinder |
| CN108223812A (en) * | 2016-12-22 | 2018-06-29 | 湖南中大创远数控装备有限公司 | Rotation axis seal structure |
| WO2022068291A1 (en) * | 2020-09-30 | 2022-04-07 | 三一汽车制造有限公司 | Water resistance apparatus, pumping system, pumping machine, and cleaning method |
-
2010
- 2010-09-09 CN CN201020529166XU patent/CN201844012U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013056544A1 (en) * | 2011-10-19 | 2013-04-25 | 湖南三一智能控制设备有限公司 | Sealing structure of hydraulic cylinder |
| CN103452953A (en) * | 2013-09-05 | 2013-12-18 | 中联重科股份有限公司 | Hydraulic oil cylinder, waterproof system thereof and concrete pumping device |
| CN105298976A (en) * | 2015-10-12 | 2016-02-03 | 江苏恒立高压油缸股份有限公司 | Crusher cylinder |
| CN108223812A (en) * | 2016-12-22 | 2018-06-29 | 湖南中大创远数控装备有限公司 | Rotation axis seal structure |
| WO2022068291A1 (en) * | 2020-09-30 | 2022-04-07 | 三一汽车制造有限公司 | Water resistance apparatus, pumping system, pumping machine, and cleaning method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110525 Termination date: 20160909 |