CN111878146A - Hydraulic support pushing device and hydraulic support - Google Patents
Hydraulic support pushing device and hydraulic support Download PDFInfo
- Publication number
- CN111878146A CN111878146A CN202010800970.5A CN202010800970A CN111878146A CN 111878146 A CN111878146 A CN 111878146A CN 202010800970 A CN202010800970 A CN 202010800970A CN 111878146 A CN111878146 A CN 111878146A
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- push rod
- pushing
- limiting
- base
- hydraulic support
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- 230000007246 mechanism Effects 0.000 claims abstract description 60
- 238000003466 welding Methods 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- 210000003205 muscle Anatomy 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000013585 weight reducing agent Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- 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
- E21D23/08—Advancing mechanisms
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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Abstract
The invention discloses a hydraulic support pushing device and a hydraulic support, wherein the pushing device comprises a base, a pushing mechanism and a push rod, and two ends of the pushing mechanism are respectively hinged with the base and the push rod; the base is provided with a vertical limiting mechanism and a horizontal limiting mechanism, and when the push rod moves in the vertical direction, the vertical limiting mechanism is used for limiting the moving range of the push rod in the vertical direction; when the push rod moves horizontally under the driving of the pushing mechanism, the horizontal limiting mechanism is used for limiting the moving range of the push rod in the horizontal direction. According to the invention, the vertical limiting mechanism and the horizontal limiting mechanism are arranged on the base on the pushing device, so that the moving range of the push rod is limited when the push rod moves on the base under the driving of the pushing mechanism, the push rod is ensured to move in a roughly horizontal state, and the push rod is prevented from being jacked to exceed the normal height range by an object positioned below the push rod.
Description
Technical Field
The invention belongs to the technical field of hydraulic supports, and particularly relates to a hydraulic support pushing device and a hydraulic support.
Background
The hydraulic support is an important component of complete equipment in a coal mine, and the pushing device of the hydraulic support can realize pushing sliding of the scraper conveyor and a pulling function of the hydraulic support. Referring to fig. 1, the pushing device is located in the middle of the inner gear of the base 1a, the pushing device comprises a push rod 2a, a pushing jack 3a, a connector 4a, a pin shaft and other parts, one end of the pushing jack 3a is connected with the base 1a, the other end of the pushing jack is connected with the tail of the push rod 2a, the tail of the push rod 2a is connected with the pushing jack 3a, the front of the push rod 2a is connected with the connector 4a, the front of the connector 4a is connected with a scraper conveyor, and the pushing device achieves pushing sliding and pulling functions of the push rod 2a through stretching of the pushing jack 3 a. In the moving process of the push rod 2a in the prior art, the push rod 2a is easily jacked to exceed the normal height range by an object positioned below the push rod 2a, so that the push rod 2a is deviated in the horizontal direction, and further the working stability of the push rod 2a is influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a hydraulic support pushing device and a hydraulic support, wherein the pushing device can limit the moving range of a push rod when the push rod moves on a base under the driving of a pushing mechanism so as to ensure that the push rod moves in a roughly horizontal state and further ensure the normal work of the push rod.
The invention provides a hydraulic support pushing device which comprises a base, a pushing mechanism and a push rod, wherein two ends of the pushing mechanism are respectively hinged with the base and the push rod; the base is provided with a vertical limiting mechanism and a horizontal limiting mechanism, and when the push rod moves in the vertical direction, the vertical limiting mechanism is used for limiting the moving range of the push rod in the vertical direction; when the push rod moves horizontally under the driving of the pushing mechanism, the horizontal limiting mechanism is used for limiting the moving range of the push rod in the horizontal direction.
Further, the push rod includes:
the push rod body comprises a hollow rod body formed by welding a first cover plate, a first main rib, a second cover plate and a second main rib, and a reinforcing rib assembly is arranged inside the hollow rod body;
the connecting seat is connected with one end of the push rod body and is used for being connected with a connecting head;
and the first U-shaped seat is connected with the other end of the push rod body and is used for being hinged with one end of the pushing mechanism.
Further, the strengthening rib subassembly includes horizontal muscle and indulges the muscle, horizontal muscle with the width direction of push rod body is parallel, indulge the muscle with the length direction of push rod body is parallel.
Furthermore, the pushing mechanism is a pushing jack, a cylinder body of the pushing jack is hinged to the base, a piston rod of the pushing jack is hinged to the push rod, and an included angle exists between the piston rod and the push rod when the pushing jack drives the push rod to move.
Furthermore, the cylinder body of the pushing jack is detachably connected with the base through a first fastening assembly.
Furthermore, a piston rod of the pushing jack is detachably connected with the push rod through a second fastening assembly.
Further, horizontal stop gear includes:
the first limiting plate is arranged close to the hinged position of the pushing mechanism and the push rod, and a first limiting part which can be in contact connection with the first limiting plate is arranged on one side of the push rod close to the base;
the second limiting plate is arranged close to the hinged position of the pushing mechanism and the base, and a second limiting part which can be in contact connection with the second limiting plate is further arranged on one side of the push rod close to the base;
when the push rod moves horizontally to enable the first limiting part to be in contact with the first limiting plate, the push rod stops moving under the matching of the first limiting plate and the first limiting part;
when the push rod moves horizontally to enable the second limiting part to be in contact with the second limiting plate, the push rod stops moving under the matching of the second limiting plate and the second limiting part.
Further, vertical stop gear includes:
the first gap bridge is arranged at one end of the base and positioned above the push rod, and when the push rod moves horizontally, the hinged part of the pushing mechanism and the push rod is kept below the first gap bridge;
the second gap bridge is arranged at one end, far away from the first gap bridge, of the base and is positioned above the push rod;
when the push rod moves vertically and is in contact with the first gap bridge, the push rod stops moving upwards under the limit of the first gap bridge;
when the push rod moves vertically and is in contact with the second gap bridge, the push rod stops moving upwards under the limit of the second gap bridge.
Furthermore, a contact plate is arranged at a position, close to the hinge joint of the push rod and the pushing mechanism, of the push rod, the contact plate comprises an arc section close to one end of the first gap bridge, and when the push rod vertically moves and is in contact with the first gap bridge, the arc section on the contact plate is in contact with the first gap bridge so as to limit the push rod to continuously move upwards.
According to another aspect of the present invention, there is provided a hydraulic support, comprising a hydraulic support pushing apparatus as described above.
According to the hydraulic support pushing device and the hydraulic support, the vertical limiting mechanism and the horizontal limiting mechanism are arranged on the base on the pushing device, so that when the push rod moves on the base under the driving of the pushing mechanism, the moving range of the push rod is limited, the push rod is guaranteed to move approximately in a horizontal state, the normal work of the push rod is guaranteed, the push rod is prevented from being jacked to exceed the normal height range by an object positioned below the push rod, and the push rod is prevented from driving a scraper connected with the push rod to move to exceed the working range of the scraper.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a hydraulic support pushing device in the prior art
FIG. 2 is a schematic diagram of a hydraulic mount pusher jack according to an exemplary embodiment of the present invention;
FIG. 3 is a top view of a hydraulic mount pusher jack according to an exemplary embodiment of the present invention;
FIG. 4 is a schematic structural view of a putter in accordance with an exemplary embodiment of the present invention;
FIG. 5 is a perspective view of a pushrod according to an exemplary embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a base in accordance with an exemplary embodiment of the present invention;
fig. 7 is a schematic structural diagram of a connecting socket according to an exemplary embodiment of the present invention;
FIG. 8 is a schematic view of a first clevis of an exemplary embodiment of the present invention;
FIG. 9 is a schematic view of a pusher jack mechanism according to an exemplary embodiment of the present invention;
fig. 10 is a schematic structural diagram of a connecting head according to an exemplary embodiment of the present invention.
In the figure:
1 a-a base, 2 a-a push rod, 3 a-a pushing jack and 4 a-a connector;
1-a base;
2-a pushing mechanism, 201-a cylinder body, 202-a piston rod;
3-push rod, 301-body, 302-connecting seat, 303-first U-shaped seat, 3011-first cover plate, 3012-first main rib, 3013-second cover plate, 3014-second main rib, 3015-suspension ring seat, 3016-suspension ring, 3017-transverse rib and 3018-longitudinal rib;
4-a connector;
5-a first pin shaft;
6-a cotter pin;
7-a second pin shaft;
8-a second U-shaped seat;
9-a third pin shaft;
10-a fourth pin;
11-a first limiting plate;
12-a second limiting plate;
13-a first bridge;
14-a second bridge;
15-contact plate.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The invention provides a hydraulic support pushing device, which is shown in figures 2 and 3 and comprises a base 1, a pushing mechanism 2 and a push rod 3, wherein two ends of the pushing mechanism 2 are respectively hinged with the base 1 and the push rod 3; the base 1 is provided with a vertical limiting mechanism and a horizontal limiting mechanism, and when the push rod 3 moves in the vertical direction, the vertical limiting mechanism is used for limiting the moving range of the push rod 3 in the vertical direction; when the push rod 3 is driven by the pushing mechanism 2 to move horizontally, the horizontal limiting mechanism is used for limiting the moving range of the push rod 3 in the horizontal direction. Through set up vertical stop gear and horizontal stop gear on base 1, can make push rod 3 when moving on base 1 under advancing mechanism 2's drive, prescribe a limit to push rod 3's moving range to guarantee that push rod 3 is the horizontal state removal roughly, guarantee its normal work, in order to prevent that push rod 3 from being located push rod 3 below object jacking to surpassing its normal altitude range, and prevent that push rod 3 from driving rather than the scraper blade machine that is connected and moving to surpassing its working range.
As a preferred embodiment, referring to fig. 4 and 5, the push rod 3 includes a push rod body 301, a connecting seat 302 and a first U-shaped seat 303, the push rod body 301 includes a hollow rod body formed by welding a first cover plate 3011, a first main rib 3012, a second cover plate 3013 and a second main rib 3014, and a reinforcing rib assembly is disposed inside the hollow rod body; the connecting seat 302 is connected with one end of the push rod body 301, and the connecting seat 302 is used for being connected with the connecting head 4; the first U-shaped seat 303 is connected to the other end of the push rod body 301, and the first U-shaped seat 303 is used for being hinged to one end of the pushing mechanism 2. In this embodiment, the first cover 3011, the first main bar 3012, the second cover 3013 and the second main bar 3014 may be connected by bevel welding or fillet welding, and the first U-shaped seat 303 is also fixedly connected to the first main bar 3012, the second cover 3013 and the second main bar 3014 by bevel welding or fillet welding. Preferably, the connecting seat 302, the first U-shaped seat 303 and the connecting head 4 are all cast parts with weight reduction design, wherein the weight reduction design includes hollow design, and the like, see fig. 7, 8 and 10. Wherein, connector 4 and connecting seat 302 are articulated through first round pin axle 5 and cotter pin 6 cooperation, and connector 4 accessible second round pin axle 7 is connected with scraping the trigger. Wherein, the position of the first cover plate 3011 near the connecting seat 302 is provided with a suspension ring seat 3015 and a suspension ring 3016 connected with the suspension ring seat 3015.
In a preferred embodiment, the reinforcing rib assembly includes a transverse rib 3017 and a longitudinal rib 3018, the transverse rib 3017 is parallel to the width direction of the putter body 301, and the longitudinal rib 3018 is parallel to the length direction of the putter body 301. In the present embodiment, the ram body 301 is reinforced by providing the horizontal bar 3017 and the vertical bar 3018 in the ram body 301.
In a preferred embodiment, the pushing mechanism 2 is a pushing jack, a cylinder 201 of the pushing jack is hinged to the base 1, a piston rod 202 of the pushing jack is hinged to the push rod 3, and when the pushing jack drives the push rod 3 to move, an included angle exists between the piston rod 202 and the push rod 3. In this embodiment, when the pushing jack drives the push rod 3 to move, a certain angle is always formed between the piston rod 202 and the push rod 3, so that the force applied by the pushing jack on the push rod 3 is divided into two component forces, namely, a lifting force in the vertical direction and a pushing force in the horizontal direction, and thus, the bottom lifting and pushing functions can be simultaneously realized by using one pushing jack.
Further, the cylinder 201 of the pushing jack is detachably connected with the base 1 through a first fastening assembly. In this embodiment, the first fastening assembly comprises a second U-shaped seat 8 disposed on the base 1, and a third pin 9 disposed on the cylinder 201 and hinged to the second U-shaped seat 8, and the cylinder 201 and the base 1 are detachably connected to achieve flexibility of connection therebetween.
Wherein, see fig. 9, the piston rod 202 of the pushing jack is detachably connected with the push rod 3 by means of a second fastening assembly. In this embodiment, the second fastening assembly comprises a fourth pin 10 provided on the piston rod 202 and hingeably connected to the first U-shaped seat 303, and the flexibility of connection between the piston rod 202 and the push rod 3 is achieved by detachably connecting the piston rod 202 to the push rod.
As a preferred embodiment, referring to fig. 6, the horizontal limiting mechanism includes a first limiting plate 11 and a second limiting plate 12, the first limiting plate 11 is disposed near the hinge joint of the pushing mechanism 2 and the push rod 3, and a first limiting portion capable of contacting and connecting with the first limiting plate 11 is disposed on one side of the push rod 3 near the base 1; the second limit plate 12 is arranged close to the hinge joint of the pushing mechanism 2 and the base 1, and one side of the push rod 3 close to the base 1 is also provided with a second limit part which can be in contact connection with the second limit plate 12; when the push rod 3 moves horizontally to enable the first limiting part to be in contact with the first limiting plate 11, the push rod 3 stops moving under the matching of the first limiting plate 11 and the first limiting part; when the push rod 3 moves horizontally to make the second limit portion contact with the second limit plate 12, the push rod 3 stops moving under the cooperation of the second limit plate 12 and the second limit portion. In the present embodiment, the first limiting portion and the second limiting portion are preferably disposed between the first limiting plate 11 and the second limiting plate 12, and when the push rod 3 moves horizontally toward the first limiting plate 11 to make the first limiting portion contact with the first limiting plate 11, the push rod 3 stops moving continuously toward the first limiting plate 11 under the cooperation of the first limiting plate 11 and the first limiting portion; when the push rod 3 moves horizontally towards the second position-limiting plate 12 to make the second position-limiting portion contact with the second position-limiting plate 12, the push rod 3 stops moving continuously towards the second position-limiting plate 12 under the cooperation of the second position-limiting plate 12 and the second position-limiting portion.
Further, the vertical limiting mechanism comprises a first gap bridge 13 and a second gap bridge 14, the first gap bridge 13 is arranged at one end of the base 1 and is positioned above the push rod 3, and when the push rod 3 moves horizontally, the hinged part of the pushing mechanism 2 and the push rod 3 is kept below the first gap bridge 13; the second gap bridge 14 is arranged at one end of the base 1 far away from the first gap bridge 13 and is positioned above the push rod 3; when the push rod 3 moves vertically and contacts with the first gap bridge 13, the push rod 3 stops moving upwards under the limit of the first gap bridge 13; when the push rod 3 moves vertically and contacts the second bridge 14, the push rod 3 stops moving upward under the restriction of the second bridge 14. In the present embodiment, the first bridge 13 is preferably a box structure welded to the base 1; the height of the push rod 3 raised upwards at the front end and the rear end can be limited by the arrangement of the first gap bridge 13 and the second gap bridge 14.
The contact plate 15 is arranged at a position, close to the hinge joint of the push rod 3 and the pushing mechanism 2, of the push rod, the contact plate 15 comprises an arc section close to one end of the first gap bridge 13, and when the push rod 3 vertically moves and is in contact with the first gap bridge 13, the arc section on the contact plate 15 is in contact with the first gap bridge 13 to limit the push rod 3 to continuously move upwards. In the present embodiment, the contact plate 15 is connected to the outside of the first U-shaped seat 303 by welding.
According to another aspect of the present invention, there is provided a hydraulic support, comprising a hydraulic support pushing apparatus as described above.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The hydraulic support pushing device is characterized by comprising a base (1), a pushing mechanism (2) and a push rod (3), wherein two ends of the pushing mechanism (2) are hinged with the base (1) and the push rod (3) respectively; the base (1) is provided with a vertical limiting mechanism and a horizontal limiting mechanism, and when the push rod (3) moves in the vertical direction, the vertical limiting mechanism is used for limiting the moving range of the push rod (3) in the vertical direction; when the push rod (3) moves horizontally under the driving of the pushing mechanism (2), the horizontal limiting mechanism is used for limiting the moving range of the push rod (3) in the horizontal direction.
2. Hydraulic support pushing device according to claim 1, characterized in that said push rod (3) comprises:
the push rod comprises a push rod body (301) and a push rod body, wherein the push rod body (301) comprises a hollow rod body formed by welding a first cover plate (3011), a first main rib (3012), a second cover plate (3013) and a second main rib (3014), and a reinforcing rib component is arranged inside the hollow rod body;
the connecting seat (302) is connected with one end of the push rod body (301) and is used for being connected with the connecting head (4);
the first U-shaped seat (303) is connected with the other end of the push rod body (301) and is used for being hinged with one end of the pushing mechanism (2).
3. The hydraulic support pushing device as claimed in claim 1, wherein the reinforcing rib assembly comprises a transverse rib (3017) and a longitudinal rib (3018), the transverse rib (3017) is parallel to the width direction of the push rod body (301), and the longitudinal rib (3018) is parallel to the length direction of the push rod body (301).
4. The hydraulic support pushing device of claim 1, wherein the pushing mechanism (2) is a pushing jack, a cylinder (201) of the pushing jack is hinged to the base (1), a piston rod (202) of the pushing jack is hinged to the push rod (3), and when the pushing jack drives the push rod (3) to move, an included angle exists between the piston rod (202) and the push rod (3).
5. Hydraulic support pushing device according to claim 4, characterized in that the cylinder (201) of the pushing jack is detachably connected to the base (1) by means of a first fastening assembly.
6. Hydraulic support pushing device according to claim 4, characterized in that the piston rod (202) of the pushing jack is detachably connected to the push rod (3) by means of a second fastening assembly.
7. The hydraulic support pushing device of claim 1, wherein the horizontal limiting mechanism comprises:
the first limiting plate (11) is arranged close to the hinged position of the pushing mechanism (2) and the push rod (3), and a first limiting part which can be in contact connection with the first limiting plate (11) is arranged on one side, close to the base (1), of the push rod (3);
the second limiting plate (12) is arranged close to the hinged position of the pushing mechanism (2) and the base (1), and a second limiting part which can be in contact connection with the second limiting plate (12) is further arranged on one side, close to the base (1), of the push rod (3);
when the push rod (3) horizontally moves to enable the first limiting part to be in contact with the first limiting plate (11), the push rod (3) stops moving under the matching of the first limiting plate (11) and the first limiting part;
when the push rod (3) horizontally moves to enable the second limiting part to be in contact with the second limiting plate (12), the push rod (3) stops moving under the matching of the second limiting plate (12) and the second limiting part.
8. The hydraulic support pushing apparatus of claim 7, wherein the vertical limiting mechanism comprises:
the first gap bridge (13) is arranged at one end of the base (1) and is positioned above the push rod (3), and when the push rod (3) moves horizontally, the hinged part of the pushing mechanism (2) and the push rod (3) is kept below the first gap bridge (13);
the second gap bridge (14) is arranged at one end, far away from the first gap bridge (13), of the base (1) and is positioned above the push rod (3);
when the push rod (3) moves vertically and is in contact with the first gap bridge (13), the push rod (3) stops moving upwards under the limit of the first gap bridge (13);
when the push rod (3) moves vertically and contacts with the second bridge (14), the push rod (3) stops moving upwards under the limit of the second bridge (14).
9. The hydraulic support pushing device of claim 8, wherein a contact plate (15) is arranged on the push rod (3) close to the hinged position of the push rod and the pushing mechanism (2), the contact plate (15) comprises a circular arc section close to one end of the first bridge (13), and when the push rod (3) moves vertically and is in contact with the first bridge (13), the circular arc section on the contact plate (15) is in contact with the first bridge (13) to limit the push rod (3) to move upwards continuously.
10. A hydraulic prop, characterized in that it comprises a hydraulic prop pusher jack according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010800970.5A CN111878146A (en) | 2020-08-11 | 2020-08-11 | Hydraulic support pushing device and hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010800970.5A CN111878146A (en) | 2020-08-11 | 2020-08-11 | Hydraulic support pushing device and hydraulic support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111878146A true CN111878146A (en) | 2020-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010800970.5A Pending CN111878146A (en) | 2020-08-11 | 2020-08-11 | Hydraulic support pushing device and hydraulic support |
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| Country | Link |
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| CN (1) | CN111878146A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006851A (en) * | 2021-03-19 | 2021-06-22 | 中煤科工开采研究院有限公司 | Mining hydraulic support limiting pushing mechanism |
| CN113510334A (en) * | 2021-06-30 | 2021-10-19 | 郑州煤矿机械集团股份有限公司 | Tailor welding method for hydraulic support push rod with liquid supply and return functions |
-
2020
- 2020-08-11 CN CN202010800970.5A patent/CN111878146A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006851A (en) * | 2021-03-19 | 2021-06-22 | 中煤科工开采研究院有限公司 | Mining hydraulic support limiting pushing mechanism |
| CN113510334A (en) * | 2021-06-30 | 2021-10-19 | 郑州煤矿机械集团股份有限公司 | Tailor welding method for hydraulic support push rod with liquid supply and return functions |
| CN113510334B (en) * | 2021-06-30 | 2023-02-03 | 郑州煤矿机械集团股份有限公司 | Tailor welding method for hydraulic support push rod with liquid supply and return functions |
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