CN113357220B - Vertical extruder core rod oil cylinder and piston rod protection device thereof - Google Patents
Vertical extruder core rod oil cylinder and piston rod protection device thereof Download PDFInfo
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- CN113357220B CN113357220B CN202110609231.2A CN202110609231A CN113357220B CN 113357220 B CN113357220 B CN 113357220B CN 202110609231 A CN202110609231 A CN 202110609231A CN 113357220 B CN113357220 B CN 113357220B
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- piston rod
- protecting sleeve
- gland
- flange
- sleeve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
- B21C23/085—Making tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/21—Presses specially adapted for extruding metal
- B21C23/212—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1471—Guiding means other than in the end cap
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N1/00—Constructional modifications of parts of machines or apparatus for the purpose of lubrication
Abstract
The invention discloses a protection device for a piston rod of a core rod oil cylinder, which comprises: the device comprises a piston rod protecting sleeve, a guide copper sleeve, a connecting flange and a dustproof gland; the bottom of the piston rod protecting sleeve is provided with a step flange, and the step flange is provided with a step screw via hole; the guide copper sleeve is arranged at the upper part of an inner hole of the piston rod protecting sleeve, the connecting flange is arranged at the upper part of the outer wall of the piston rod protecting sleeve, and the connecting flange is provided with a flange through hole; the dustproof gland is arranged at the top of the piston rod protecting sleeve and presses the tops of the connecting flange, the piston rod protecting sleeve and the guide copper sleeve; the dustproof gland is provided with a gland through hole, and the connecting screw rod sequentially penetrates through the gland through hole, the flange through hole and the nut to be fastened, so that the dustproof gland is connected to the connecting flange. The invention also discloses a mandrel cylinder of the vertical extruder. According to the invention, impurities such as oxide skin, glass powder and the like falling into the holes in the movable beam in the extrusion process can be isolated from the piston rod, so that the damage of the impurities to the surface of the piston rod is reduced, and the service life of the core rod oil cylinder is prolonged.
Description
Technical Field
The invention belongs to the technical field of metal extrusion, and particularly relates to a vertical extruder core rod oil cylinder and a piston rod protection device thereof.
Background
As shown in fig. 1, a schematic diagram of an installation position of a mandrel cylinder in the prior art is shown.
In the extrusion operation process of the 360MN extruder, the mandrel cylinder drives the mandrel to move up and down through the extension and contraction of the piston rod, so that the inner hole of the seamless pipe is formed.
The cylinder cover 12 of the core rod cylinder is connected to the lower part of the lower backing plate 21 of the movable beam 2 by the cylinder connecting through hole 14 and is positioned at the center part of the lower backing plate 21 of the movable beam 2, and the cylinder cover 12 is connected with the cylinder body of the core rod cylinder by the cylinder connecting through hole 15; the upper part of the piston rod 11 of the core rod oil cylinder is reliably connected with the core rod. The core rod oil cylinder is positioned at the center of the six main oil cylinders and surrounded by the 6 main oil cylinders, and the core rod oil cylinder cannot be directly and independently disassembled and removed. When the core rod oil cylinder has faults and needs to be replaced, the eastern main oil cylinders No. 3 and No. 4 are removed, and the core rod oil cylinder can be removed, so that the core rod oil cylinder is quite difficult to replace. The main oil cylinder weight is approximately 80 tons, a plurality of special main oil cylinder hoisting tools, tools and auxiliary tools are needed, a complete set of dies, cover plates, valve tables, oil inlet and outlet pipes and the like are needed to be disassembled before the main oil cylinder is disassembled, the maintenance is complex, the number of people is large, and the construction period is long. Usually, the maintenance cost of the related matched parts such as the piston rod 11, the cylinder cover 12, the seal and the like is up to hundreds of thousands yuan each time, and the maintenance cost is quite high.
Fig. 2 is a schematic diagram showing the installation position of a piston rod 11 on a mandrel cylinder in the prior art; as shown in fig. 3, a schematic structural diagram of a cylinder head 12 of a mandrel cylinder in the prior art is shown; as shown in fig. 4, is a top view of fig. 3.
The piston rod 11 is installed on the hole of the cylinder cover 12, the inner wall of the hole is provided with a dust ring 13 and a cylinder cover seal, and the cylinder cover 12 of the core rod cylinder is provided with the dust ring 13 and the cylinder cover seal, but the protection position is arranged on the lower base plate 21 and is lower.
In recent years, with the increase of production tasks, the yield is increased year by year, the abrasion to key parts of the extruder is also larger, and particularly the phenomena of oil leakage caused by cylinder cover sealing failure of an inner hole of a driving forming extrusion pipe and abrasion of a piston rod 11 are prominent. In the process of hot extrusion of the 360MN extruder, the residual fine impurities such as oxide scale, glass powder, lubricant and the like inevitably fall onto the middle hole of the movable beam 2 along with cooling water, and as the extrusion quantity increases, the contact area between the impurities and the piston rod 11 exposed in the middle hole is continuously increased, so that the impurities are adhered and stuck on the piston rod 11. As the amount of operation of the piston rod 11 increases, the impurities become more and more dense, resulting in increased wear of the piston rod 11. The piston rod 11 continuously stretches and contracts to run up and down and rub with impurities, the surface of the piston rod 11 and the dust ring 13 and the seal of the cylinder cover 12 are worn and damaged, the seal of the cylinder cover of the core rod cylinder is invalid, and oil leakage is caused, so that the service life of the cylinder is short. The 360MN extruder generally has the equipment failure of oil leakage of the core rod cylinder after the continuous extrusion production for half a year, the core rod cylinder needs to be replaced almost every half a year, and the service life of the cylinder is reduced.
The weight of the movable beam 2 is approximately 450 tons, the height is 3.3 meters, the lower part of the movable beam 2 is provided with a lower base plate 21, the thickness of the lower base plate of the movable beam is 300 millimeters, and the weight is approximately 50 tons; the upper part of the movable beam 2 is provided with a movable beam upper base plate, the thickness of the movable beam upper base plate is 400 mm, and the weight is approximately 40 tons; the total height of the movable beam 2, the base plate and the lower base plate 21 is more than 4 meters, and the movable beam assembly is more than 550 tons by adding nearly two hundred large screws. The movable beam 2 is difficult to disassemble and assemble, and is difficult to hoist and transport, so that the scheme of disassembling and removing the movable beam 2 and the lower base plate 21 from the 360MN extruder and processing redundant materials in holes of the movable beam 2 and the lower base plate 21 is very difficult to realize, even if only the movable beam lower base plate 21 is disassembled, more difficulties are caused, and the downtime and the reconstruction period are quite long.
Disclosure of Invention
The invention aims to provide a vertical extruder core rod oil cylinder and a piston rod protection device thereof, which can isolate impurities such as oxide skin, glass powder and the like falling into a hole in a movable beam in the extrusion process from a piston rod so as to reduce the damage of the impurities on the surface of the piston rod, protect the cylinder cover seal of the core rod oil cylinder and prolong the service life of the core rod oil cylinder.
In order to achieve the above purpose, the technical solution adopted by the invention is as follows:
core rod hydro-cylinder piston rod protector includes: the device comprises a piston rod protecting sleeve, a guide copper sleeve, a connecting flange and a dustproof gland; the bottom of the piston rod protecting sleeve is provided with a step flange, the step flange is provided with a plurality of step screw through holes, and mounting screws are arranged on the step screw through holes; the guide copper sleeve is arranged at the upper part of an inner hole of the piston rod protecting sleeve, the connecting flange is arranged at the upper part of the outer wall of the piston rod protecting sleeve, and the connecting flange is provided with a plurality of flange through holes; the dustproof gland is arranged at the top of the piston rod protecting sleeve and presses the tops of the connecting flange, the piston rod protecting sleeve and the guide copper sleeve; the dustproof gland is provided with a plurality of gland through holes; the connecting screw rod sequentially passes through the gland through hole, the flange through hole and the nut to be fastened, and the dustproof gland and the connecting flange are connected into a whole.
Further, the bottom end face of the dustproof gland is in a stepped annular shape, the outer end face is pressed at the top of the connecting flange, and the inner end face is pressed at the top of the piston rod protecting sleeve and the guide copper sleeve.
Further, the dustproof gland is provided with a dustproof ring groove and a sealing ring groove on the inner wall of the inner hole respectively, a gland dustproof ring is arranged in the dustproof ring groove, and a gland sealing ring is arranged in the sealing ring groove.
Further, a protective sleeve sealing groove is formed in the end face of the bottom of the piston rod protective sleeve, and a protective sleeve sealing ring is arranged in the protective sleeve sealing groove; the bottom of the dustproof gland is provided with an end sealing groove, and the end sealing groove is provided with an O-shaped sealing ring.
Further, an annular step is arranged at the upper end part of the inner hole of the piston rod protecting sleeve, and the guide copper sleeve is arranged on the annular step.
Further, an external thread is arranged on the outer wall of the piston rod protecting sleeve, an internal thread is arranged on the inner wall of the connecting flange, and the piston rod protecting sleeve is connected with the connecting flange through threads.
Further, a threaded counter bore is formed in the top of the guide copper sleeve.
Further, the inner wall of the guide copper bush is provided with a lubricating oil groove, and the lubricating oil groove is connected with a lubricating system of the core rod oil cylinder.
Further, the top of gland dust ring is provided with dustproof ring limit, and dustproof ring limit presses on the outer wall of piston rod.
The vertical extruder core rod oil cylinder is characterized in that a spigot is arranged on the end face of the outer side of an inner hole of a cylinder cover of the vertical extruder core rod oil cylinder, and a plurality of threaded holes are formed in the end face of the spigot; the step flange is installed on the tang, and mounting screw passes step screw via hole and connects on the screw hole.
The technical effects of the invention include:
according to the invention, impurities such as oxide skin, glass powder and the like falling into the holes in the movable beam in the extrusion process are isolated from the piston rod, so that the damage of the impurities to the surface of the piston rod is reduced, the cylinder cover seal of the core rod cylinder is protected, and the service life of the core rod cylinder is prolonged.
The protection device for the piston rod of the core rod oil cylinder increases effective protection for the piston rod, protects the surface of the piston rod, protects the exposed part of the piston rod when extending out of the middle hole of the movable beam, effectively isolates fine broken impurities such as oxide skin, glass powder and the like which fall into the middle hole of the movable beam in the extrusion process, prevents the impurities from adhering and attaching to the piston rod, avoids the piston rod from being strained by the impurities along with more frequent up-and-down operation, prevents the sealing failure of the cylinder cover from leaking oil, prolongs the normal service cycle of the core rod oil cylinder, greatly exceeds the sealing replacement cycle of the main oil cylinder, and can ensure that the core rod oil cylinder is replaced while the sealing of the main oil cylinder is replaced. In addition, other maintenance and cleaning measures are matched, for example, a sealing ring and a dustproof ring in a dustproof gland are replaced periodically in the use process of a press, impurities such as oxide skin, glass powder and the like in a hole in a movable beam in the extrusion process are cleaned timely, the accumulated impurities are guaranteed to be lower than the dustproof gland, the friction between the accumulated impurities and the surface of a piston rod is reduced, and accordingly the service life of a core rod oil cylinder is prolonged.
After the core rod oil cylinder piston rod protection device is used, the core rod oil cylinder does not have oil leakage, so that the maintenance cost is reduced, the productivity of the extruded pipe is greatly released, the output of a production task is strongly ensured, the output of the extruded pipe is continuously refreshed, and particularly, the production index is comprehensively and greatly improved.
Drawings
FIG. 1 is a schematic view of the installation position of a mandrel cylinder in the prior art;
FIG. 2 is a schematic diagram of the installation position of a piston rod on a mandrel cylinder in the prior art;
FIG. 3 is a schematic view of a prior art cylinder head of a mandrel cylinder;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a schematic structural view of a rod guard of a mandrel cylinder according to the present invention;
FIG. 6 is a schematic view showing the use state of the rod guard of the mandrel cylinder according to the present invention;
fig. 7 is an enlarged view of a portion a in fig. 6;
fig. 8 is an enlarged view of a portion B in fig. 6;
FIG. 9 is a schematic view of the cylinder head of the present invention;
fig. 10 is a top view of fig. 9.
Detailed Description
The following description fully illustrates the specific embodiments of the invention to enable those skilled in the art to practice and reproduce it.
In order to ensure smooth production, firstly, stable operation of equipment is required to be ensured, so that higher requirements are put on the structure of the core rod oil cylinder of the equipment. On the basis of continuously perfecting related structures such as the internal structure of the core rod oil cylinder, the sources of abrasion of the piston rod 11 and oil leakage caused by sealing failure of the cylinder cover 12 are also found. After investigation, it is found that whether the external protection of the exposed piston rod is effective or not when the piston rod 11 of the core rod oil cylinder extends out of the hole in the movable beam is a very critical factor causing the abrasion of the piston rod 11.
FIG. 5 is a schematic structural view of a rod protecting device for a mandrel cylinder, according to the present invention; FIG. 6 is a schematic view showing the use state of the rod guard of the mandrel cylinder according to the present invention; as shown in fig. 7, an enlarged view of the portion a in fig. 6; as shown in fig. 8, an enlarged view of the portion B in fig. 6 is shown.
The utility model provides a plug hydro-cylinder piston rod protector, the structure includes: the piston rod protecting sleeve 31, the guide copper sleeve 32, the connecting flange 33, the dustproof gland 34, the connecting screw 35 and the nut 36.
The piston rod protecting sleeve 31 is of a cylindrical structure with two open ends, the bottom of the piston rod protecting sleeve is provided with a step flange 313, the step flange 313 is provided with a plurality of step screw through holes, mounting screws 311 are arranged on the step screw through holes, the piston rod protecting sleeve 31 is connected with the cylinder cover 12 through the mounting screws 311, and the piston rod protecting sleeve 31, an inner hole of the cylinder cover 11 and the piston rod 13 are ensured to be coaxial; the guide copper sleeve 32 is arranged on the upper part of the inner hole of the piston rod protecting sleeve 31, and the piston rod 11 extends into the piston rod protecting sleeve 31 and the guide copper sleeve 32 after penetrating out from the hole of the cylinder cover 12; the connecting flange 33 is arranged at the upper part of the outer wall of the piston rod protecting sleeve 31, and the connecting flange 33 is provided with a plurality of flange through holes; the dustproof gland 34 is arranged at the top of the piston rod protecting sleeve 31, the bottom end surface of the dustproof gland 34 is in a stepped annular shape, the outer end surface is pressed at the top of the connecting flange 33, the inner end surface is pressed at the top of the piston rod protecting sleeve 31 and the guide copper sleeve 32, the dustproof gland 34 is provided with a plurality of gland through holes corresponding to the positions of the flange through holes, and the piston rod 11 penetrates out of the inner hole of the dustproof gland 34; the connecting screw rod 35 sequentially passes through the gland through hole and the flange through hole to be fastened with the nut 36; the piston rod protecting sleeve 31, the dustproof gland 34 and the connecting flange 33 are tightly connected into a reliable whole, the dustproof gland 34 is stably buckled on the piston rod protecting sleeve 31 and the guide copper sleeve 32, and the piston rod protecting sleeve 31 and the guide copper sleeve 32 are tightly pressed and cannot move.
In the preferred embodiment of the present invention, in order to increase the tightness of the upper portion of the piston rod guard and prevent impurities from entering the piston rod guard 31, a dust ring groove and a seal ring groove are respectively provided on the inner wall of the inner hole of the dust cover 34, a cover dust ring 341 is installed in the dust ring groove, and a cover seal ring 342 is installed in the seal ring groove. The gland dust ring 341 and the gland sealing ring 342 are tightly attached to the outer wall of the piston rod 11, and play a role in sealing and preventing impurities from entering. The bottom of the dustproof gland 34 is provided with an end sealing groove, and the end sealing groove is provided with an O-shaped sealing ring 343, so that the piston rod 11 is effectively protected.
The top of the guide copper bush 32 is provided with a threaded counter bore 322, and when in maintenance and replacement, a special tool is connected to the threaded counter bore 322, so that the maintenance and the replacement are convenient.
The inner wall of the guide copper bush 32 is provided with a lubrication groove 321, and the lubrication groove 321 is connected with a lubrication system of the core rod oil cylinder. The top of the gland dust ring 341 is provided with a dust-proof ring edge which presses on the outer wall of the piston rod 11 to isolate the entry of external impurities.
The upper end of the inner hole of the piston rod protecting sleeve 31 is provided with an annular step, the guide copper sleeve 32 is arranged on the annular step, the annular step can reliably clamp the clamping guide copper sleeve 32, and the guide copper sleeve 32 is ensured not to float. The outer wall of the piston rod protecting sleeve 31 is provided with external threads, the inner wall of the connecting flange 33 is provided with internal threads, and the piston rod protecting sleeve 31 is connected with the connecting flange 33 through threads. The bottom end face of the piston rod protecting sleeve 31 is provided with a protecting sleeve sealing groove, and a protecting sleeve sealing ring 312 is installed in the protecting sleeve sealing groove.
The height of the core rod oil cylinder piston rod protection device is larger than 1300mm, and the core rod oil cylinder piston rod protection device can extend to one third of the height of the middle hole of the movable beam 2, so that the surface of the piston rod 11 is effectively protected.
As shown in fig. 9, a schematic view of the cylinder head 12 according to the present invention is shown; as shown in fig. 10, is a top view of fig. 9.
According to the improvement of the protection device of the piston rod of the core rod cylinder, the structure of the cylinder cover 12 of the core rod cylinder of the vertical extruder is correspondingly improved. A spigot 16 is processed on the end surface of the outer side of the inner hole of the cylinder cover 12, and a plurality of threaded holes 17 are formed on the end surface of the spigot 16; a stepped flange 313 at the bottom of the piston rod protecting sleeve 31 is mounted on the spigot 16, and a mounting screw 311 passes through the stepped screw via hole to be connected to the threaded hole 17.
The installation process of the core rod oil cylinder piston rod protection device comprises the following steps:
a step flange 313 at the bottom of the piston rod protecting sleeve 31 is assembled on the spigot 16 of the cylinder cover 12 and fixed by using a mounting screw 311, and the piston rod protecting sleeve 31 is connected to the spigot 16 of the cylinder cover 12; the guide copper sleeve 32 is arranged on an annular step of the inner hole of the piston rod protecting sleeve 31; the core rod cylinder ascends to connect the cylinder cover 12 to the lower part of the lower backing plate 21 by bolts;
the connecting flange 33 is sleeved from the upper part of the piston rod 11 and is in threaded connection with the outer wall of the upper end of the piston rod protecting sleeve 31; after a gland dust ring 341, a gland sealing ring 342 and an O-shaped sealing ring 343 are arranged on the dust-proof gland 34, the connecting flange 33 is arranged from the upper part of the piston rod 11, the bottom end is pressed on the top of the piston rod protecting sleeve 31 and the guide copper sleeve 32, and the connecting screw 35 sequentially passes through a gland through hole and a flange through hole and then is fixed by a nut 36.
The core rod oil cylinder piston rod protection device is successfully installed for more than 20 days, and after debugging is finished, the use proves that the piston rod can be effectively protected, and the exposed part of the piston rod extending out of the middle hole of the movable beam is protected. Impurities such as oxide skin and glass powder in the extrusion process are dropped into the holes in the movable beam to be isolated from the piston rod, so that the surface of the piston rod is protected, and the sealing failure of the cylinder cover of the core rod cylinder is effectively prevented. The service life of the core rod cylinder is greatly prolonged by improving the optimized core rod cylinder.
The terminology used herein is for the purpose of description and illustration only and is not intended to be limiting. As the present invention may be embodied in several forms without departing from the spirit or essential attributes thereof, it should be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalences of such metes and bounds are therefore intended to be embraced by the appended claims.
Claims (3)
1. A mandrel cylinder piston rod guard comprising: the device comprises a piston rod protecting sleeve, a guide copper sleeve, a connecting flange and a dustproof gland; the piston rod protecting sleeve is of a cylindrical structure with two open ends, the bottom of the piston rod protecting sleeve is provided with a step flange, the step flange is provided with a plurality of step screw through holes, mounting screws are mounted on the step screw through holes, the end face of the bottom of the piston rod protecting sleeve is provided with a protecting sleeve sealing groove, and a protecting sleeve sealing ring is mounted in the protecting sleeve sealing groove; the upper end part of the inner hole of the piston rod protecting sleeve is provided with an annular step, the guide copper sleeve is arranged on the annular step, the top of the guide copper sleeve is provided with a threaded counter bore, the inner wall of the guide copper sleeve is provided with a lubricating oil groove, and the lubricating oil groove is connected with a lubricating system of the core rod oil cylinder; the connecting flange is arranged at the upper part of the outer wall of the piston rod protecting sleeve, the connecting flange is provided with a plurality of flange through holes, the outer wall of the piston rod protecting sleeve is provided with external threads, the inner wall of the connecting flange is provided with internal threads, and the piston rod protecting sleeve is connected with the connecting flange through threads; the dustproof gland is arranged at the top of the piston rod protecting sleeve and is pressed at the tops of the connecting flange, the piston rod protecting sleeve and the guide copper sleeve, and the dustproof gland is provided with a plurality of gland through holes; the end face of the bottom of the dustproof gland is in a stepped ring shape, the outer end face is pressed on the top of the connecting flange, the inner end face is pressed on the top of the piston rod protecting sleeve and the guide copper sleeve, the bottom of the dustproof gland is provided with an end sealing groove, and the end sealing groove is provided with an O-shaped sealing ring; the connecting screw rod sequentially passes through the gland through hole and the flange through hole to be fastened with the nut, so that the dustproof gland and the connecting flange are connected into a whole; the inner wall of the inner hole of the dustproof gland is respectively provided with a dustproof ring groove and a sealing ring groove, the dustproof ring groove is internally provided with a gland dustproof ring, and the sealing ring groove is internally provided with a gland sealing ring.
2. The mandrel cylinder piston rod protector of claim 1, wherein a dust-proof ring edge is arranged at the top of the gland dust-proof ring, and the dust-proof ring edge is pressed on the outer wall of the piston rod.
3. A vertical extruder core rod cylinder using the core rod cylinder piston rod guard according to any one of claims 1 or 2, comprising a cylinder head, characterized in that the end face of the outer side of the inner hole of the cylinder head is provided with a spigot, and the end face of the spigot is provided with a plurality of threaded holes; the step flange is installed on the tang, and mounting screw passes step screw via hole and connects on the screw hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110609231.2A CN113357220B (en) | 2021-06-01 | 2021-06-01 | Vertical extruder core rod oil cylinder and piston rod protection device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110609231.2A CN113357220B (en) | 2021-06-01 | 2021-06-01 | Vertical extruder core rod oil cylinder and piston rod protection device thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN113357220A CN113357220A (en) | 2021-09-07 |
| CN113357220B true CN113357220B (en) | 2023-07-14 |
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| CN202110609231.2A Active CN113357220B (en) | 2021-06-01 | 2021-06-01 | Vertical extruder core rod oil cylinder and piston rod protection device thereof |
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| JP2009243629A (en) * | 2008-03-31 | 2009-10-22 | Hitachi Ltd | Cylinder device |
| JP2014152819A (en) * | 2013-02-06 | 2014-08-25 | Kobelco Contstruction Machinery Ltd | Fluid pressure cylinder |
| CN104454757A (en) * | 2014-11-12 | 2015-03-25 | 三一重型装备有限公司 | Hydraulic cylinder and cylinder cover structure thereof |
| CN211231105U (en) * | 2019-12-27 | 2020-08-11 | 三和油缸(常州)有限公司 | One-time forming oil cylinder for die casting |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3029234A1 (en) * | 1980-08-01 | 1982-04-01 | Schloemann-Siemag AG, 4000 Düsseldorf | Indirect extrusion press - where billet residue can be sheared off extruder barrel plug without displacing extrusion tools (BR 29.9.81) |
| DE19806980C2 (en) * | 1998-02-21 | 2000-02-17 | Ipm Ingenieur Und Projektmanag | Two-stage hydraulic short stroke linear drive |
| BR9914346A (en) * | 1998-10-09 | 2002-01-15 | Wyman Gordon Co | Apparatus and method for forming a tube with increased wall thickness at its ends |
| CN201661681U (en) * | 2010-03-10 | 2010-12-01 | 无锡市长江液压缸厂 | Piston rod sealing system |
| CN102943787B (en) * | 2012-10-13 | 2015-09-16 | 无锡市协清机械制造有限公司 | The guide structure of nitrogen balance cylinder piston rod |
| CN206555209U (en) * | 2017-03-06 | 2017-10-13 | 江苏省交通工程集团百润工程检测有限公司 | Easy opened end cap for hydraulic jack |
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2021
- 2021-06-01 CN CN202110609231.2A patent/CN113357220B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009243629A (en) * | 2008-03-31 | 2009-10-22 | Hitachi Ltd | Cylinder device |
| JP2014152819A (en) * | 2013-02-06 | 2014-08-25 | Kobelco Contstruction Machinery Ltd | Fluid pressure cylinder |
| CN104454757A (en) * | 2014-11-12 | 2015-03-25 | 三一重型装备有限公司 | Hydraulic cylinder and cylinder cover structure thereof |
| CN211231105U (en) * | 2019-12-27 | 2020-08-11 | 三和油缸(常州)有限公司 | One-time forming oil cylinder for die casting |
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| CN113357220A (en) | 2021-09-07 |
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