CN220204244U - Oil cylinder without external leakage for hydraulic pumping unit - Google Patents
Oil cylinder without external leakage for hydraulic pumping unit Download PDFInfo
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- CN220204244U CN220204244U CN202321739070.XU CN202321739070U CN220204244U CN 220204244 U CN220204244 U CN 220204244U CN 202321739070 U CN202321739070 U CN 202321739070U CN 220204244 U CN220204244 U CN 220204244U
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- 238000005086 pumping Methods 0.000 title claims abstract description 28
- 239000003921 oil Substances 0.000 claims abstract description 100
- 238000007789 sealing Methods 0.000 claims abstract description 73
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 24
- 238000006073 displacement reaction Methods 0.000 claims abstract description 23
- 210000004907 gland Anatomy 0.000 claims abstract description 18
- 238000012856 packing Methods 0.000 claims description 9
- 230000003584 silencer Effects 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 claims description 4
- 229920001973 fluoroelastomer Polymers 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 1
- 239000003208 petroleum Substances 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
A non-leakage oil cylinder of a hydraulic pumping unit relates to the field of hydraulic pumping units, in particular to a non-leakage oil cylinder of a hydraulic pumping unit. The cylinder is provided with an outer cylinder barrel and an inner cylinder barrel, one end of the outer cylinder barrel is connected with the cylinder bottom through threads, the other end of the outer cylinder barrel is connected with the outer side of the cylinder head through threads, one end of the inner cylinder barrel is connected with the inner side of the cylinder head through threads, the other end of the inner cylinder barrel is connected with an upper sealing gland, the inner cylinder barrel is sealed with a piston rod through an upper sealing group, the inner cylinder barrel is internally provided with the piston rod, the cylinder head of the cylinder is connected with a flange through a bolt, the piston rod is sealed with the cylinder head through a lower sealing group, the outer sealing gland is installed on the outer side of the lower sealing group, a moving assembly is installed in the cylinder, the cylinder bottom is connected with a cover through a bolt, a displacement sensor is installed in the cover, the other end of the displacement sensor is connected with an external electric control system, the outer cylinder barrel is close to the cylinder head end and is provided with an oil inlet and an oil outlet, and the outer cylinder barrel is provided with an oil outlet. The hydraulic oil seal of the piston rod is eliminated structurally, and the external leakage of the piston rod of the oil cylinder is fundamentally solved.
Description
Technical Field
The utility model relates to the field of hydraulic pumping units, in particular to a non-leakage oil cylinder of a hydraulic pumping unit.
Background
Compared with the traditional beam pumping unit, the hydraulic pumping unit has obvious technical advantages in the aspects of safety, energy conservation, emission reduction, digitization, intellectualization and the like. However, the problems of oil leakage of the oil cylinder, pollution of hydraulic oil and the like caused by leakage of the hydraulic cylinder are not solved fundamentally, so that popularization of the hydraulic pumping unit is greatly limited.
The utility model provides a hydraulic oil cylinder without external leakage, which structurally cancels the rod end seal of the oil cylinder, can realize long-term use of the oil cylinder under the condition of lateral force without external leakage, and fundamentally solves the problem of external leakage of the oil cylinder of a hydraulic pumping unit.
Disclosure of Invention
The utility model aims to provide a non-leakage oil cylinder of a hydraulic pumping unit, which is used for solving the problems of oil leakage of an oil cylinder, pollution of hydraulic oil and the like caused by external leakage of the hydraulic cylinder.
The technical scheme of the utility model is that the oil cylinder without external leakage of the hydraulic pumping unit comprises a piston rod 1, a flange 2, a cylinder head 3, an oil inlet and outlet 4, an outer cylinder 5, an inner cylinder 6, an oil outlet 7, an oil outlet 8, an upper seal 9, an upper seal gland 10, a support cylinder 11, an exhaust hole 12, a guide head 13, a cylinder bottom 14, a displacement sensor 15, a cover 16, an air filtering silencer 17, a guide head wear-resistant sealing sleeve 18, a sealing ring 19, a piston 20, a stop tube 21, a lower sealing group 22 and a lower seal gland 23, wherein the oil cylinder is provided with an outer cylinder 5 and an inner cylinder 6, the length of the inner cylinder is smaller than that of the outer cylinder, one end of the outer cylinder 5 is connected with the cylinder bottom 14 through threads, the other end is connected with the outer side of the cylinder head 3 through threads, one end of the inner cylinder 6 is connected with the inner side of the cylinder head 3 through threads, the other end of the inner cylinder 6 is connected with an upper sealing gland 10, the inner cylinder 6 and a piston rod are sealed through an upper sealing group 9, the inner cylinder 6 is internally provided with the piston rod 1, the cylinder head 3 of the oil cylinder is connected with the flange 2 through bolts, the piston rod and the cylinder head 3 are sealed through a lower sealing group 22, the outer side of the lower sealing group 22 is provided with a lower sealing gland 23, the oil cylinder is internally provided with a moving assembly 30, the cylinder bottom 14 is connected with a cover 16 through bolts, a displacement sensor 15 is arranged in the cover 16, the displacement sensor 15 is connected with the piston rod through a circuit, the other end of the displacement sensor is connected with an external electric control system, the outer cylinder 5 is close to the end of the cylinder head 3 and is provided with an oil inlet and an oil outlet 4, the outer cylinder 5 is provided with an oil outlet 8,
the movable assembly 30 comprises an oil cylinder piston 20, a supporting cylinder 11, a guide head 13, a piston rod 1 and a stop tube 21, wherein the piston 20 is arranged between the outer cylinder 5 and the inner cylinder 6, the position of the piston 20 is close to one side of the upper sealing gland 10, the piston 20 is sealed with the inner cylinder and the outer cylinder through the sealing assembly, one side of the piston 20 is in threaded connection with the supporting cylinder 11, the other side of the piston 20 is provided with the stop tube 21, the stop tube 21 is sleeved on the inner cylinder 6, the stop tube 21 is in contact with the piston 20, one end of the supporting cylinder 11 is in threaded connection with the piston 20, the other end of the supporting cylinder 11 is in threaded connection with the guide head 13, the guide head 13 is in threaded connection with the top end of the piston rod 1, the inner cylinder 6 is sealed with the supporting cylinder 11 through a sealing ring 19, the supporting cylinder 11 is provided with an oil drain hole 7, the oil drain hole 7 is close to the piston 20 and is close to the oil drain port 8, the guide head 13 is provided with an air drain hole 12, and a guide head wear-resistant sealing sleeve 18 is arranged outside the guide head 13.
The piston rod and the cylinder head are sealed by a lower sealing component 22, which comprises a lower sealing packing 221, an oil collecting groove 222, a sealing ring I223, a guide sleeve 224 and a fluororubber sealing ring 225, wherein the lower sealing packing is arranged in a groove of the cylinder head 3, the lower sealing packing 221 is directly contacted with petroleum and bears the lateral force of the piston rod, therefore, the composite material of polytetrafluoroethylene and aramid fiber with high temperature resistance, high pressure and good lubrication is mainly used, good self-lubricating property and excellent wear resistance and sealing property are mainly provided, and the sealing ring 223 is a polyurethane or fluororubber sealing ring with petroleum corrosion resistance; the guide sleeve 224 should be made of a PEEK material that is wear resistant, corrosion resistant, high temperature resistant, and self-lubricating. Hydraulic oil seal between piston and cylinder: ensuring that the leakage in the oil cylinder meets the regulation of related standards.
The upper sealing group 9 comprises an upper sealing packing 91, a sealing ring III95, rubber rings 93 and a guide 94, wherein the upper sealing packing 91 is arranged between the inner cylinder barrel and the piston rod, the sealing ring 19 is arranged in a groove of the upper sealing gland 10, the upper sealing gland 10 and the piston rod 1 are sealed, the rubber rings 93 are arranged in a groove at the top end of the inner cylinder barrel, the inner cylinder barrel 6 and the supporting cylinder 11 are sealed, the sealing ring III95 is arranged in grooves at two sides of the piston 20, the piston 20 and the inner cylinder barrel are sealed, the guide 94 is arranged in a groove in the middle of the piston, and the piston 20 and the inner cylinder barrel are sealed.
A filtering silencer 17 is arranged in the cover 16, and the silencer is arranged at the opposite side of the displacement sensor.
The piston 20 moves between the outer cylinder 5 and the inner cylinder 6.
The guide head 13 is sleeved with a guide head wear-resistant sealing sleeve 18, the guide head 13 is provided with an exhaust hole 12, and the exhaust hole 12 is coaxially communicated with the hole of the guide head wear-resistant sealing sleeve 18.
The working principle of the utility model is as follows: the oil pump provides hydraulic oil with certain pressure and flow rate to enter the oil cylinder from the oil inlet and outlet 4, so that the moving parts consisting of the oil cylinder piston 20, the supporting cylinder 11, the guide head 13, the piston rod 1 and the stop tube 21 are pushed to move upwards, the piston rod 1 is driven to ascend, and the ascending stroke acquires signals through the displacement sensor 15. When the displacement reaches a set value, the oil pump stops supplying oil, and hydraulic oil is discharged out of the oil cylinder through the oil inlet and outlet 4 under the action of gravity load.
The beneficial technical effects of the utility model are as follows:
the oil cylinder consists of an inner cylinder barrel and an outer cylinder barrel, the piston moves between the inner cylinder barrel and the outer cylinder barrel, the piston rod moves in the inner cylinder barrel, the hydraulic oil seal of the piston rod is structurally canceled, and the external leakage of the piston rod of the oil cylinder is fundamentally solved.
The sealing leakage of the piston is internal leakage, and the piston can be reused by the oil drain hole and the oil drain port oil drain and return box, so that the leakage of hydraulic oil can not be caused, and the problems of environmental pollution and the like are solved.
The inner cylinder barrel and the supporting barrel are sealed by a sealing ring, a small amount of hydraulic oil leaked from the inner cylinder barrel is directly discharged back to the oil tank and is not in direct contact with the piston rod, so that the risk that the hydraulic oil is polluted by the piston rod is eliminated.
The piston rod is sealed through upper and lower both ends of interior cylinder, can ensure that pollutants such as oil get into the hydro-cylinder, and after long-term use, the sealed wearing and tearing cause a small amount of oil get into by sealed in the support section of thick bamboo, can't contact with the hydraulic oil that leaks in the piston, can not pollute hydraulic oil.
Because the oil cylinder structure is not provided with the rod end seal, the damage of the side force applied to the piston rod to the rod end seal is radically solved.
A plurality of petroleum seals are arranged in a fixed space between the inner cylinder inner diameter and the piston rod, so that good petroleum seal is ensured, and even if certain petroleum enters the fixed space, the petroleum can be gradually solidified, so that further invasion of subsequent petroleum is prevented.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic view of the extended state in the present utility model.
Fig. 3 is a schematic view of a partial structure in the present utility model.
Fig. 4 is a schematic view of the lower seal structure of the present utility model.
Fig. 5 is a schematic view of the upper seal structure of the present utility model.
Description of the embodiments
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-5, the present utility model provides a technical solution:
the hydraulic pumping unit has no external leakage cylinder, which comprises a piston rod 1, a flange 2, a cylinder head 3, an oil inlet and outlet 4, an outer cylinder 5, an inner cylinder 6, an oil outlet 7, an oil outlet 8, an upper seal 9, an upper seal gland 10, a supporting cylinder 11, an exhaust hole 12, a guide head 13, a cylinder bottom 14, a displacement sensor 15, a cover 16, an air filtering silencer 17, a guide head wear-resistant sealing sleeve 18, a sealing ring 19, a piston 20, a stop tube 21, a lower seal group 22 and a lower seal gland 23, wherein the cylinder is provided with an outer cylinder 5 and an inner cylinder 6, the length of the inner cylinder is smaller than that of the outer cylinder, the length of the inner cylinder is slightly smaller than half of that of the outer cylinder, one end of the outer cylinder 5 is connected with the cylinder bottom 14 through threads, the other end of the outer cylinder is connected with the outer side of the cylinder head 3 through threads, one end of the inner cylinder 6 is connected with the inner side of the cylinder head 3 through threads, the other end of the inner cylinder 6 is connected with the upper seal gland 10, the inner cylinder 6 and the piston rod are sealed by an upper sealing group 9, a piston 20 is sleeved outside the inner cylinder 6, the piston 20 is arranged between the outer cylinder 5 and the inner cylinder 6 and is sealed with the inner cylinder and the outer cylinder by a sealing component, one side of the piston 20 is in threaded connection with a supporting cylinder 11, the other side of the piston 20 is provided with a stop tube 21, the stop tube 21 is sleeved on the inner cylinder 6, the stop tube 21 is contacted with the piston 20, one end of the supporting cylinder 11 is in threaded connection with the piston 20, the other end of the supporting cylinder 11 is in threaded connection with a guide head 13, the guide head 13 is in threaded connection with the top end of the piston rod 1, the cylinder head 3 is connected with a flange 2 by a bolt, the flange 2 is sealed with the piston rod 1 by a lower sealing group 22, a lower sealing gland 23 is arranged outside the lower sealing group 22, the cylinder bottom 14 is connected with a cover 16 by a bolt, a displacement sensor 15 is arranged in the cover 16, the displacement sensor 15 receives a piston rod position signal, the other end of the displacement sensor is connected with an external electric control system, the inner cylinder barrel 6 and the supporting barrel 11 are sealed by a sealing ring 19, the end of the outer cylinder barrel 5 close to the cylinder head 3 is provided with an oil inlet and outlet 4, the outer cylinder barrel 5 is provided with an oil outlet 8, the lower end of the supporting barrel 11 is provided with an oil outlet 7, the oil outlet 7 is close to the piston 20, the guide head 13 is provided with an exhaust hole 12, the guide head 13 is externally provided with a guide head wear-resistant sealing sleeve 18,
a filtering silencer 17 is arranged in the cover 16, and the silencer is arranged at the opposite side of the displacement sensor.
The piston 20 moves between the outer cylinder 5 and the inner cylinder 6.
A gap is arranged between the inner cylinder 6 and the supporting cylinder 11, and the size of the gap is adjustable according to the size.
The piston 20 is not attached to the top end of the inner cylinder 6, and has a gap, so that the oil of the piston can flow into the oil drain hole 7 arranged on the support cylinder 11 through the gap, and can flow into the system loop through the oil drain hole 7 and the oil port 8.
The guide head 13 is sleeved with a guide head abrasion-resistant sealing sleeve 18, and the guide head 13 is provided with an exhaust hole 12.
The oil drain hole 7 is close to the piston 20, and the oil drain hole 7 needs to ensure that the piston rod 1 is not blocked when it is fully retracted. The position of the oil drain hole 7 is lower than the top end position of the inner cylinder 6.
The operation process of the utility model comprises the following steps: the hydraulic pumping unit oil cylinder flange 2 is directly arranged on a wellhead to prevent petroleum leakage, the hydraulic pumping unit oil cylinder flange is fastened through bolts, the oil inlet and outlet 4 is connected with a pumping unit system power oil port, the oil port 8 is connected with a pumping unit system loop, the displacement sensor 15 is connected with a pumping unit electric control system to collect displacement signals, the oil pump provides hydraulic oil with certain pressure and flow rate to enter the oil cylinder from the oil inlet and outlet 4, the hydraulic oil enters the hydraulic oil cylinder to push the stop tube 21 to move, the stop tube 21 moves upwards to push the piston rod 1 to move, the piston rod is connected with the support tube 11, the support tube 11 moves upwards, the support tube 11 is connected with the guide head, the guide head moves upwards to drive the pumping rod to move upwards, and the lifting stroke collects signals through the displacement sensor 15. When the displacement reaches a set value, the oil pump stops oil supply, under the action of gravity load, the oil cylinder internally comprises a piston rod 1 which moves downwards, the piston rod 1 moves downwards, a guide head on the piston rod 1 moves downwards along with the guide head, the guide head drives a supporting tube 11 to move, the supporting rod is connected with a piston 20, the piston is connected with a stop tube 21, the stop tube 21 moves downwards along with the downward movement, hydraulic oil is discharged out of the oil cylinder through an oil inlet and outlet 4, a downward stroke acquires signals through a displacement sensor 15, and when the displacement reaches the set value, the oil pump starts oil supply. The next new movement is started. The stroke distance of the piston rod is slightly less than half the length of the oil cylinder barrel. When the piston 20 is internally leaked, oil flows into the oil port 8 through the oil drain hole 7 and then flows back to a system loop, external leakage cannot occur, sealing leakage of the piston is internal leakage, the piston can be reused by draining oil from the oil drain hole and the oil drain port, leakage of hydraulic oil cannot be caused, and the problems of environmental pollution and the like are solved. Compared with the traditional hydraulic pumping unit, the utility model can generate 0.1L-0.15L of external leakage quantity every day, converts the original external leakage into internal leakage, ensures that the energy waste of the hydraulic pumping unit in the operation process is greatly reduced within the national relevant standard specification; the oil seal is an upper seal 9 and a lower seal group 22, so that the oil is prevented from contacting with hydraulic oil, and particularly, the upper seal 9 has almost no lateral force under the guiding action of the lower seal group 22, and the oil is sealed by the packing seal ring, so that the hydraulic oil is prevented from being polluted by the oil, and the service life of a hydraulic element is prolonged by 80%.
Claims (6)
1. The utility model provides a hydraulic pumping unit does not have outer hydro-cylinder that leaks, includes piston rod (1), flange (2), cylinder head (3), advance oil drain port (4), outer cylinder (5), interior cylinder (6), oil drain hole (7), hydraulic fluid port (8), goes up sealed group (9), cylinder bottom (14), piston (20), motion subassembly (30), its characterized in that: the cylinder is provided with an outer cylinder barrel (5) and an inner cylinder barrel (6), the length of the inner cylinder barrel (6) is smaller than that of the outer cylinder barrel (5), one end of the outer cylinder barrel (5) is connected with a cylinder bottom (14) through threads, the other end of the outer cylinder barrel (5) is connected with the outer side of a cylinder head (3) through threads, one end of the inner cylinder barrel (6) is connected with the inner side of the cylinder head (3) through threads, the other end of the inner cylinder barrel (6) is connected with an upper sealing gland (10), the inner cylinder barrel (6) is sealed with a piston rod through an upper sealing group (9), a piston rod (1) is arranged in the inner cylinder barrel (6), the cylinder head (3) of the cylinder is connected with a flange (2) through bolts, the piston rod is sealed with the cylinder head (3) through a lower sealing group (22), the outer side of the lower sealing gland (23) is arranged on the lower sealing group (22), a moving assembly (30) is arranged in the cylinder, the moving assembly (30) is arranged on the piston rod (1), the cylinder bottom (14) is connected with the inner side of the cylinder head (3) through bolts, a displacement sensor (15) is arranged in the cover (16), the displacement sensor (15) is connected with the outer cylinder barrel (4) through an upper sealing group (9), the piston rod (4), the outer cylinder barrel (5) is provided with an oil port (8).
2. The leakage-free oil cylinder of the hydraulic oil pumping unit according to claim 1, wherein: the motion assembly (30) comprises an oil cylinder piston (20), a supporting cylinder (11), a guide head (13), a piston rod (1) and a stop tube (21), wherein the piston (20) is arranged between an outer cylinder (5) and an inner cylinder (6), the position of the piston is close to one side of an upper sealing gland (10), the piston (20) is sealed with an inner cylinder barrel and an outer cylinder barrel through a sealing assembly, one side of the piston (20) is in threaded connection with the supporting cylinder (11), the stop tube (21) is mounted on the other side of the piston (20), the stop tube (21) is sleeved on the inner cylinder barrel (6), the piston (20) is in contact with the stop tube (21), one end of the supporting cylinder (11) is in threaded connection with the piston (20), the other end of the supporting cylinder (11) is in threaded connection with the guide head (13), the guide head (13) is in threaded connection with the top end of the piston rod (1), the inner cylinder (6) is sealed with the supporting cylinder (11) through a sealing ring (19), the supporting cylinder (11) is provided with an oil drain hole (7), the drain hole (7) is close to the piston (20), and is close to the oil drain hole (8), the guide head (13) is provided with an exhaust hole (12), and the guide head (13) is provided with an outer wear-resistant seal sleeve (18).
3. The leakage-free oil cylinder of the hydraulic oil pumping unit according to claim 1, wherein: a filtering silencer (17) is arranged in the cover (16), and the filtering silencer (17) is arranged at the opposite side of the displacement sensor.
4. The non-leakage cylinder of a hydraulic pumping unit according to claim 2, wherein: the guide head (13) is sleeved with a guide head wear-resistant sealing sleeve (18), the guide head (13) is provided with an exhaust hole (12), and the exhaust hole (12) is coaxially communicated with the hole of the guide head wear-resistant sealing sleeve (18).
5. The leakage-free oil cylinder of the hydraulic oil pumping unit according to claim 1, wherein: the lower sealing group (22) comprises a lower sealing packing (221), an oil collecting groove (222), a sealing ring I (223), a guide sleeve (224) and a fluororubber sealing ring (225), wherein the lower sealing group (22) is arranged in a groove of the cylinder head (3).
6. The leakage-free oil cylinder of the hydraulic oil pumping unit according to claim 1, wherein: the upper sealing group (9) comprises an upper sealing packing (91), a sealing ring III (95), a rubber ring (93) and a guide (94), wherein the upper sealing packing (91) is arranged between the inner cylinder barrel and the piston rod, the sealing ring (19) is arranged in a groove of the upper sealing gland (10), the upper sealing gland (10) and the piston rod (1) are sealed, the rubber ring (93) is arranged in a groove at the top end of the inner cylinder barrel, the inner cylinder barrel (6) and the support barrel (11) are sealed, the sealing ring III (95) is arranged in grooves at two sides of the piston (20), the piston (20) and the inner cylinder barrel are sealed, the guide (94) is arranged in a groove in the middle of the piston, and the piston (20) and the inner cylinder barrel and the outer cylinder barrel are sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321739070.XU CN220204244U (en) | 2023-07-05 | 2023-07-05 | Oil cylinder without external leakage for hydraulic pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321739070.XU CN220204244U (en) | 2023-07-05 | 2023-07-05 | Oil cylinder without external leakage for hydraulic pumping unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220204244U true CN220204244U (en) | 2023-12-19 |
Family
ID=89154929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321739070.XU Active CN220204244U (en) | 2023-07-05 | 2023-07-05 | Oil cylinder without external leakage for hydraulic pumping unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220204244U (en) |
-
2023
- 2023-07-05 CN CN202321739070.XU patent/CN220204244U/en active Active
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