CN116856984A - Extendable hydraulic support - Google Patents
Extendable hydraulic support Download PDFInfo
- Publication number
- CN116856984A CN116856984A CN202210168605.6A CN202210168605A CN116856984A CN 116856984 A CN116856984 A CN 116856984A CN 202210168605 A CN202210168605 A CN 202210168605A CN 116856984 A CN116856984 A CN 116856984A
- Authority
- CN
- China
- Prior art keywords
- hydraulic cylinder
- piston rod
- hydraulic
- rubber balloon
- support
- 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.)
- Pending
Links
- 239000000428 dust Substances 0.000 claims abstract description 62
- 238000007789 sealing Methods 0.000 claims description 38
- 238000004140 cleaning Methods 0.000 claims description 11
- 239000004744 fabric Substances 0.000 claims description 8
- 210000003437 trachea Anatomy 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 12
- 239000003921 oil Substances 0.000 abstract description 12
- 239000012535 impurity Substances 0.000 abstract description 7
- 230000005465 channeling Effects 0.000 abstract description 5
- 239000010720 hydraulic oil Substances 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 4
- 238000005065 mining Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Actuator (AREA)
Abstract
The invention belongs to the technical field of mine underground supporting equipment, in particular to an extensible hydraulic support, which comprises a support body, wherein a hydraulic cylinder is arranged in the support body and is used for realizing the extension of the hydraulic support, a dust removing device is arranged on the hydraulic cylinder, a vacuum pump on the dust removing device enables a rubber balloon to be inflated and expanded instantly under the control of a controller, an ash layer on the surface of the rubber balloon is cracked due to expansion, then the controller controls the vacuum pump to be matched with a second air pipe for instant air suction, the rubber balloon is contracted in the air suction process, the cracked ash layer on the surface of the rubber balloon is separated, dust impurities are reduced and attached to the surface of a piston rod of the hydraulic cylinder, the piston rod and the cylinder body are worn along with the piston rod entering the inside of the hydraulic cylinder body, the situation that the hydraulic cylinder leaks oil or the oil channeling situation occurs, the abrasion of important parts such as the hydraulic cylinder and the piston rod is rapid, and the situation that hydraulic oil is deteriorated is reduced is generated, and the actual use effect of the hydraulic support is improved.
Description
Technical Field
The invention belongs to the technical field of underground mine supporting equipment, and particularly relates to an extensible hydraulic support.
Background
In our life, there are various commodities, but many of these commodities are produced by smelting mineral products, and in the process of mining mineral products, hydraulic supports are often used for supporting so as to prevent the mining face from collapsing, and the life and property safety is violated.
Hydraulic mounts are structures used to control the mine pressure at the mine face. The mining face ore pressure acts on the hydraulic support in an external load mode. In the mechanical system of the interaction of the hydraulic support and the mining face surrounding rock, if the resultant force of all supporting parts of the hydraulic support and the external load force of the top plate acting on the hydraulic support are exactly in the same straight line, the hydraulic support is very suitable for the mining face surrounding rock.
The hydraulic cylinder extends the top beam or other components to the designated position by utilizing the hydraulic transmission principle, dust and impurities are more because the environment where the hydraulic cylinder is located is under a mine, the dust and impurities are attached to the surface of a piston rod of the hydraulic cylinder in the actual working process and enter the hydraulic cylinder along with the piston rod, so that the piston rod and the hydraulic cylinder are possibly worn, the situation of oil leakage or oil channeling of the hydraulic cylinder is caused, important components such as the hydraulic cylinder and the piston rod are worn quickly, and the situation of high maintenance cost is caused, thereby improving the maintenance cost of the hydraulic cylinder.
In view of the above, the present invention provides an extendable hydraulic support, which solves the above technical problems.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the extensible hydraulic support provided by the invention can reduce the occurrence of the situations that dust and impurities adhere to the surface of the piston rod of the hydraulic cylinder and enter the hydraulic cylinder along with the piston rod, so that the piston rod and the hydraulic cylinder are possibly worn, the situation that the hydraulic cylinder leaks oil or oil flees, and the like, the situation that important parts such as the hydraulic cylinder and the piston rod are worn faster and the maintenance cost is high, and the maintenance cost of the hydraulic support is increased.
The invention provides an extensible hydraulic support, which comprises a support body, wherein a hydraulic cylinder is arranged in the support body and is used for realizing the extension of the hydraulic support, and a dust removing device is arranged on the hydraulic cylinder;
the dust removing device comprises a dust removing bracket, a vacuum pump and a rubber balloon; the dust removing bracket is fixedly connected with the hydraulic cylinder body; the cylinder body of the hydraulic cylinder is fixedly connected with a vacuum pump, and the vacuum pump is powered by an external power supply; the dust removal support top fixedly connected with rubber balloon, piston rod during operation on the pneumatic cylinder passes from the rubber balloon, and it has No. one trachea and No. two trachea to communicate respectively between rubber balloon and the vacuum pump, and the vacuum pump realizes in the twinkling of an eye the inflation of rubber balloon with No. one trachea cooperation, and the vacuum pump realizes in the twinkling of an eye the bleed of rubber balloon with No. two trachea cooperation.
Preferably, the upper surface of the rubber air ring is communicated with a pressure valve, and the pressure valve is matched with the rubber air ring to realize dust removal on a piston rod on the hydraulic cylinder.
Preferably, a collecting ring is arranged between the top end of the dust removing bracket and the cylinder body of the hydraulic cylinder, the collecting ring is fixedly connected with the dust removing bracket, and the collecting ring is used for collecting dust falling after the rubber balloon is treated; the collecting ring is internally provided with a sealing door, the sealing door is hinged on the collecting ring, a spring is arranged between the lower surface of the sealing door and the collecting ring, and a piston rod on the hydraulic cylinder penetrates through the sealing door when working.
Preferably, the end of the closed door is fixedly connected with dustproof cloth, the other end of the dustproof cloth is fixedly connected with the collecting ring and used for shielding a gap generated by hinging the closed door with the collecting ring, and dust is reduced from entering the lower part of the collecting ring.
Preferably, the sealing door is provided with arc-shaped rubber sheets, the number of the arc-shaped rubber sheets is two, and the arc-shaped rubber sheets are used for sealing a gap between the sealing door and a piston rod in the hydraulic cylinder.
Preferably, a placing groove is arranged on the collecting ring, and cleaning mud is placed in the placing groove; the dustproof support is provided with a door body.
The beneficial effects of the invention are as follows:
1. according to the extensible hydraulic support, the rubber air ring is fully contacted with the surface of the piston rod to erase and clean, a layer of dust is accumulated on the surface of the rubber air ring along with the increase of dust, then the rubber air ring is matched with the first air pipe through the instant inflation of the vacuum pump controlled by the controller, so that the rubber air ring is inflated instantly, the ash layer on the surface of the rubber air ring is cracked due to the instant inflation of the rubber air ring, then the controller controls the vacuum pump to be matched with the second air pipe for instant air suction, the rubber air ring is contracted in the air suction process, the cracked ash layer on the surface of the rubber air ring is separated, dust impurities are reduced to adhere to the surface of the piston rod of the hydraulic cylinder, the piston rod and the cylinder body are worn along with the piston rod entering the inside of the hydraulic cylinder body, the situation that oil leakage or oil channeling of the hydraulic cylinder occurs, the abrasion of important parts such as the hydraulic cylinder and the piston rod is rapid, and the situation that hydraulic oil is deteriorated is reduced, and the actual use effect of the hydraulic support is improved.
2. According to the extensible hydraulic support, the sealing door in the collecting ring can prevent part of dust from falling into the joint of the hydraulic cylinder body and the piston rod below the collecting ring; when the piston rod is retracted, the sealing door is closed under the action of the spring, and when the piston rod is extended, the sealing door is jacked open, so that the dustproof effect of the hydraulic cylinder is improved.
3. According to the extensible hydraulic support, the partially-fallen ash layer falls into the collecting ring below along with the instantaneous air charging and falling of the rubber balloon, the fallen dust is adsorbed by the cleaning mud in the placing groove, and after a period of time, the cleaning mud is replaced by opening the door body.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a main view of the dust removing device of the present invention;
FIG. 3 is a top plan view of the closure door of the present invention;
FIG. 4 is an enlarged view of a portion of the collector ring of the present invention;
in the figure: the dust removal device comprises a bracket body 1, a hydraulic cylinder 2, a dust removal device 3, a dust removal bracket 31, a vacuum pump 32, a rubber air ring 33, a first air pipe 34, a second air pipe 35, a pressure valve 36, a collecting ring 4, a closed door 41, dust cloth 42, an arc-shaped rubber sheet 43, a placing groove 44 and a door body 45.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
The invention provides an extensible hydraulic support, which comprises a support body 1, wherein a hydraulic cylinder 2 is arranged in the support body 1, the hydraulic cylinder 2 is used for realizing the extension of the hydraulic support, and a dust removing device 3 is arranged on the hydraulic cylinder 2;
the dust removing device 3 comprises a dust removing bracket 31, a vacuum pump 32 and a rubber balloon 33; the dust removing bracket 31 is fixedly connected with the cylinder body of the hydraulic cylinder 2; the cylinder body of the hydraulic cylinder 2 is fixedly connected with a vacuum pump 32, and the vacuum pump 32 is powered by an external power supply; the top end of the dust removal support 31 is fixedly connected with a rubber balloon 33, a piston rod on the hydraulic cylinder 2 passes through the rubber balloon 33 when working, a first air pipe 34 and a second air pipe 35 are respectively communicated between the rubber balloon 33 and the vacuum pump 32, the vacuum pump 32 is matched with the first air pipe 34 to realize the instant inflation of the rubber balloon 33, and the vacuum pump 32 is matched with the second air pipe 35 to realize the instant air suction of the rubber balloon 33;
in the working process of the extensible hydraulic support, when a piston rod in the hydraulic cylinder 2 is in a telescopic state in the working process, a vacuum pump 32 controlled by a controller is used for inflating a rubber balloon 33 arranged at the top end of the dust removal support 31, so that the rubber balloon 33 is fully contacted with the surface of the piston rod for wiping and cleaning, a layer of dust can be accumulated on the surface of the rubber balloon 33 along with the continuous wiping and cleaning process, then the vacuum pump 32 controlled by the controller is used for enabling the rubber balloon 33 to be inflated and expanded in a moment, an ash layer on the surface of the rubber balloon 33 is cracked due to the moment inflation and expansion of the rubber balloon 33, then the controller is used for controlling the vacuum pump 32 to enable the rubber balloon 33 to be pumped in a moment, the rubber balloon 33 is contracted in the pumping process, the ash layer cracked on the surface of the rubber balloon 33 is dropped, dust impurities are reduced to be attached to the surface of the piston rod of the hydraulic cylinder 2, the rubber balloon 33 enters the inside the cylinder body of the hydraulic cylinder 2 along with the piston rod, abrasion of the piston rod and the cylinder body is caused, and the situation of oil leakage or oil channeling and the like appear in the hydraulic cylinder, important parts such as the hydraulic cylinder and the piston rod are worn and the situation of the hydraulic cylinder is reduced, so that the actual use effect of the hydraulic support is improved;
as a specific embodiment of the invention, the upper surface of the rubber balloon 33 is communicated with a pressure valve 36, and the pressure valve 36 is matched with the rubber balloon 33 to realize dust removal of a piston rod on the hydraulic cylinder 2;
in the process of inflating the rubber balloon 33 by the vacuum pump 32 controlled by the controller through the first air pipe 34, the pressure in the rubber balloon 33 is increased, when the pressure reaches the set value of the pressure valve 36, the pressure valve 36 is opened, the pressure valve 36 blows air to the piston rod to remove dust, and the pressure valve 36 is matched with the rubber balloon 33, so that the dust removal on the surface of the piston rod is further realized, the heat generated when the piston rod works can be reduced while the pressure valve 36 blows air to the piston rod, the heat generated when the piston rod retracts is reduced, the heat generated when the piston rod retracts is brought back into the hydraulic cylinder 2, the service performance of the hydraulic support is influenced by the deterioration of hydraulic oil, and the actual use effect of the hydraulic support is further improved;
as a specific embodiment of the invention, a collecting ring 4 is arranged between the top end of the dust removing bracket 31 and the cylinder body of the hydraulic cylinder 2, the collecting ring 4 is fixedly connected with the dust removing bracket 31, and the collecting ring 4 is used for collecting dust falling after the rubber balloon 33 is processed; the collecting ring 4 is internally provided with a sealing door 41, the sealing door 41 is hinged on the collecting ring 4, a spring is arranged between the lower surface of the sealing door 41 and the collecting ring 4, and a piston rod on the hydraulic cylinder 2 passes through the sealing door 41 when working;
the dust removal of the rubber balloon 33 is carried out, a part of the fallen ash layer falls into the collecting ring 4 below along with the instantaneous air charging and falling of the rubber balloon 33, and the collecting ring 4 is internally provided with the sealing door 41, so that the collecting ring 4 can prevent part of dust from falling into the joint of the cylinder body and the piston rod of the hydraulic cylinder 2 below the collecting ring 4, when the piston rod is retracted, the sealing door 41 is closed under the action of a spring, and when the piston rod is extended, the sealing door is jacked up, and the dust prevention effect of the hydraulic cylinder 2 is improved;
as a specific embodiment of the present invention, the end of the sealing door 41 is fixedly connected with a dustproof cloth 42, and the other end of the dustproof cloth 42 is fixedly connected to the collecting ring 4, so as to block a gap generated by hinging the sealing door 41 and the collecting ring 4, and reduce dust entering the lower surface of the collecting ring 4;
because the closed door 41 is hinged with the collecting ring 4, a gap is formed between the closed door 41 and the collecting ring 4, and the dustproof effect of the collecting ring 4 is further affected, so that the dustproof cloth 42 fixedly connected between the collecting ring 4 and the closed door 41 can shield the gap between the collecting ring 4 and the closed door 41, dust is reduced from falling into the joint of the cylinder body and the piston rod of the hydraulic cylinder 2 from the gap between the collecting ring 4 and the closed door 41, and the dustproof effect of the hydraulic cylinder 2 is further improved;
as a specific embodiment of the present invention, the sealing door 41 is provided with two arc-shaped rubber sheets 43, and the arc-shaped rubber sheets 43 are used for sealing a gap between the sealing door 41 and a piston rod in the hydraulic cylinder 2;
by arranging the arc-shaped rubber sheets 43 on the sealing door 41, when the piston rod extends, the arc-shaped rubber sheets 43 are jacked up by the piston rod along with the sealing door 41, when the piston rod retracts, the arc-shaped rubber sheets 43 fall down along with the sealing door 41, and the two arc-shaped rubber sheets 43 restore to original state by utilizing the ductility of the two arc-shaped rubber sheets, so that the sealing door 41 is sealed, dust is further reduced from falling into the joint of the cylinder body and the piston rod of the hydraulic cylinder 2 from a gap between the collecting ring 4 and the sealing door 41, and the dustproof effect of the hydraulic cylinder 2 is further improved;
as a specific embodiment of the present invention, the collecting ring 4 is provided with a placing groove 44, and cleaning mud is placed in the placing groove 44; the dustproof bracket 31 is provided with a door body 45;
after the rubber air ring 33 is dedusted, a part of the fallen ash layer falls into the collecting ring 4 below along with the instantaneous air charging and falling of the rubber air ring 33, the fallen dust is adsorbed by the cleaning mud in the placing groove 44, and after a period of time, the cleaning mud is replaced by opening the door body 45.
Working principle: in the working process of the extensible hydraulic support, when a piston rod in the hydraulic cylinder 2 is in a telescopic state in the working process, a vacuum pump 32 controlled by a controller is used for inflating a rubber balloon 33 arranged at the top end of the dust removal support 31, so that the rubber balloon 33 is fully contacted with the surface of the piston rod for wiping and cleaning;
in the process of inflating the rubber balloon 33 by the vacuum pump 32 controlled by the controller through the first air pipe 34, the pressure in the rubber balloon 33 is increased, when the pressure reaches the set value of the pressure valve 36, the pressure valve 36 is opened, the pressure valve 36 blows air to the piston rod to remove dust, and the pressure valve 36 is matched with the rubber balloon 33, so that the dust removal on the surface of the piston rod is further realized, the heat generated when the piston rod works can be reduced while the pressure valve 36 blows air to the piston rod, the heat generated when the piston rod retracts is reduced, the heat generated when the piston rod retracts is brought back into the hydraulic cylinder 2, the service performance of the hydraulic support is influenced by the deterioration of hydraulic oil, and the actual use effect of the hydraulic support is further improved;
along with the continuous process of erasing and cleaning, a layer of dust can be accumulated on the surface of the rubber balloon 33, when the piston rod is retracted, the arc-shaped rubber sheets 43 fall down along with the sealing door 41, the two arc-shaped rubber sheets 43 restore to original state by utilizing the ductility of the two arc-shaped rubber sheets, the sealing door 41 is sealed, then the vacuum pump 32 controlled by the controller works to enable the rubber balloon 33 to be inflated and expanded instantaneously, the ash layer on the surface of the rubber balloon 33 is cracked due to the instantaneous inflation and expansion of the rubber balloon 33, then the controller controls the vacuum pump 32 to enable the rubber balloon 33 to be pumped instantaneously, the rubber balloon 33 is contracted in the pumping process, the ash layer cracked on the surface of the rubber balloon 33 is fallen off, dust impurities are reduced to be attached to the surface of the piston rod of the hydraulic cylinder 2, the piston rod enters the cylinder body of the hydraulic cylinder 2 along with the piston rod, abrasion of the piston rod and the cylinder body is caused, oil leakage or oil channeling and other important parts such as the hydraulic cylinder wear fast, and the condition of hydraulic oil is reduced, and the actual use effect of the hydraulic bracket is improved.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. An extendable hydraulic support, characterized in that: the hydraulic support comprises a support body (1), wherein a hydraulic cylinder (2) is arranged in the support body (1), the hydraulic cylinder (2) is used for realizing the extension of the hydraulic support, and a dust removing device (3) is arranged on the hydraulic cylinder (2);
the dust removing device (3) comprises a dust removing bracket (31), a vacuum pump (32) and a rubber balloon (33); the dust removal bracket (31) is fixedly connected with the cylinder body of the hydraulic cylinder (2); a vacuum pump (32) is fixedly connected to the cylinder body of the hydraulic cylinder (2), and the vacuum pump (32) is powered by an external power supply; the dust removal support (31) top fixedly connected with rubber balloon (33), piston rod during operation on pneumatic cylinder (2) passes from rubber balloon (33), and be linked together respectively between rubber balloon (33) and vacuum pump (32) and have No. one trachea (34) and No. two trachea (35), and vacuum pump (32) and No. one trachea (34) cooperation realize rubber balloon (33) and aerify in the twinkling of an eye, and vacuum pump (32) and No. two trachea (35) cooperation realize rubber balloon (33) gassing in the twinkling of an eye.
2. An extendable hydraulic support as claimed in claim 1, wherein: the upper surface of the rubber balloon (33) is communicated with a pressure valve (36), and the pressure valve (36) is matched with the rubber balloon (33) to realize dust removal on a piston rod on the hydraulic cylinder (2).
3. An extendable hydraulic support as claimed in claim 1, wherein: a collecting ring (4) is arranged between the top end of the dust removing bracket (31) and the cylinder body of the hydraulic cylinder (2), the collecting ring (4) is fixedly connected with the dust removing bracket (31), and the collecting ring (4) is used for collecting dust falling after the rubber balloon (33) is processed; the collecting ring (4) is internally provided with a sealing door (41), the sealing door (41) is hinged on the collecting ring (4), a spring is arranged between the lower surface of the sealing door (41) and the collecting ring (4), and a piston rod on the hydraulic cylinder (2) penetrates through the sealing door (41) when working.
4. An extendable hydraulic support as claimed in claim 3, wherein: the end of the sealing door (41) is fixedly connected with a dustproof cloth (42), the other end of the dustproof cloth (42) is fixedly connected to the collecting ring (4) and used for shielding a gap generated by hinging the sealing door (41) with the collecting ring (4) and preventing dust from entering the lower surface of the collecting ring (4).
5. An extendable hydraulic support as claimed in claim 3, wherein: the sealing door (41) is provided with arc-shaped rubber sheets (43), the number of the arc-shaped rubber sheets (43) is two, and the arc-shaped rubber sheets (43) are used for sealing a gap between the sealing door (41) and a piston rod in the hydraulic cylinder (2).
6. An extendable hydraulic support as claimed in claim 3, wherein: a placing groove (44) is formed in the collecting ring (4), and cleaning mud is placed in the placing groove (44); a door body (45) is arranged on the dustproof support (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210168605.6A CN116856984A (en) | 2022-02-23 | 2022-02-23 | Extendable hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210168605.6A CN116856984A (en) | 2022-02-23 | 2022-02-23 | Extendable hydraulic support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116856984A true CN116856984A (en) | 2023-10-10 |
Family
ID=88220297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210168605.6A Pending CN116856984A (en) | 2022-02-23 | 2022-02-23 | Extendable hydraulic support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116856984A (en) |
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2022
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| CN212563895U (en) * | 2020-04-22 | 2021-02-19 | 泉州市良辉液力机械有限公司 | Movable arm oil cylinder of excavator |
| CN212700969U (en) * | 2020-06-10 | 2021-03-16 | 珠海市振业混凝土有限公司 | Self-balancing dust removal device for concrete mixer |
| CN213392949U (en) * | 2020-09-11 | 2021-06-08 | 成都敏创机械有限公司 | Hydraulic cylinder prevents leaking device |
| CN112503053A (en) * | 2020-10-23 | 2021-03-16 | 浙江拓邦液压科技有限公司 | Hydraulic cylinder with dustproof function |
| CN214357000U (en) * | 2021-01-05 | 2021-10-08 | 偃师中岳耐火材料有限公司 | Excess material recycling and bagging device with ash prevention mechanism |
| CN214311413U (en) * | 2021-03-25 | 2021-09-28 | 梁洪磊 | Building engineering environment monitoring device |
| CN215762556U (en) * | 2021-07-07 | 2022-02-08 | 安徽鼎图液压设备有限公司 | Interface dust-proof hydraulic cylinder |
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