CN113605408B - Multidirectional adjustable combination formula steel pipe diagonal throwing props - Google Patents
Multidirectional adjustable combination formula steel pipe diagonal throwing props Download PDFInfo
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- CN113605408B CN113605408B CN202111025150.4A CN202111025150A CN113605408B CN 113605408 B CN113605408 B CN 113605408B CN 202111025150 A CN202111025150 A CN 202111025150A CN 113605408 B CN113605408 B CN 113605408B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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Abstract
The invention provides a multidirectional adjustable combined type steel pipe inclined throwing support, belongs to the technical field of foundation pit supporting, and is used for solving the technical problems that an existing inclined throwing support cannot be adjusted in support angle, cannot be disassembled and decomposed, and is inconvenient to transport. The supporting body comprises a height adjusting hydraulic cylinder and an axial force adjusting hydraulic cylinder, the height adjusting hydraulic cylinder is connected below a supporting edge, the lower end of the height adjusting hydraulic cylinder is connected with a combined steel pipe, the lower end of the combined steel pipe is connected with an extrusion part, the axial force adjusting hydraulic cylinder and the combined steel pipe connected with the axial force adjusting hydraulic cylinder form an inclined strut, and two ends of the inclined strut are respectively abutted to a supporting rudder and the extrusion part; the device can support different positions of the enclosure wall, can assemble and disassemble the support main body, and is convenient to transport; the inclined stay bars always have certain supporting force on the enclosure wall, so that the supporting effect is improved; reminding a security officer to adjust the length of the axial force adjusting hydraulic cylinder in time according to the use condition, and ensuring the supporting quality.
Description
Technical Field
The invention belongs to the technical field of foundation pit supporting, and relates to an inclined polishing support device, in particular to a multidirectional adjustable combined type steel pipe inclined polishing support.
Background
With the pace of the urbanization process in China being accelerated, the development and utilization of underground space are developed rapidly, foundation pit engineering is more and more common, and therefore foundation pit enclosure wall structures and implementation processes are continuously developed. The foundation pit engineering is temporary enclosure and only plays a role in the basement excavation stage, so that the factors of the surrounding environment, the structural safety, the engineering cost, the construction convenience, the construction period and the like are generally comprehensively considered.
Through retrieval, for example, chinese patent document discloses an inclined throwing support [ application number: CN201920954775.0; publication No.: CN 210529714U). This kind of inclined throwing props includes: the purlin structure is used for being fixed on the edge of the enclosure wall; the inclined throwing support is movably and/or detachably arranged on the enclosing purlin structure, a locking mechanism for locking the enclosing purlin structure and the inclined throwing support is arranged between the enclosing purlin structure and the inclined throwing support, and an inclined throwing support leg is arranged at the lower end of the inclined throwing support. After the enclosing wall is provided with the enclosing purlin structure, the inclined throwing support is directly connected to the soil body on the enclosing purlin structure in an inclined mode towards one side direction of the enclosing wall, and the lower end portion of the inclined throwing support forms a supporting point on the soil body.
Although the inclined throwing support is convenient to install, in actual use, the supporting angle of the inclined throwing support cannot be adjusted, and the inclined throwing support is long and not beneficial to transportation and inconvenient to use.
Based on this, we have designed a multidirectional adjustable combination formula steel pipe diagonal cast and have propped.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a multidirectional adjustable combined steel pipe inclined throwing support, which aims to solve the technical problems that: how to realize that the bracing support direction is adjustable and can dismantle the decomposition, convenient to use and transportation.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a multidirectional adjustable combination formula steel pipe diagonal casting props, including enclosure wall and bottom plate, be equipped with the support main part between enclosure wall and the bottom plate, the support main part includes altitude mixture control pneumatic cylinder and axial force adjusting hydraulic cylinder, the enclosure wall upper end is fixed with supports along, be fixed with the support rudder on the bottom plate, altitude mixture control pneumatic cylinder bolted connection is in the below of supporting along, and the lower extreme of altitude mixture control pneumatic cylinder bolted connection has a plurality of combination steel pipes in proper order, and the lower extreme sliding connection of combination steel pipe has the extruded article, bolted connection has a plurality of combination steel pipes in proper order on the output shaft of axial force adjusting hydraulic cylinder, the diagonal brace is constituteed rather than the combination steel pipe that axial force adjusting hydraulic cylinder is connected, and the both ends of bracing piece are fixed with the hinge respectively, all set up flutedly on support rudder and the extruded article, two hinges block respectively inside two recesses of extruded article, inside is equipped with supports tight mechanism and reminds the mechanism.
The working principle of the invention is as follows: the height of extruded article is adjusted through the small amplitude of altitude mixture control pneumatic cylinder, the height of the regulation extruded article that can be by a wide margin through the quantity of the combination steel pipe of connecting on increasing or reducing altitude mixture control pneumatic cylinder, and then adjust the support position to the enclosure wall, adjust the holding power and the length of diagonal brace through the small amplitude of axle power regulation pneumatic cylinder, the length of regulation diagonal brace that can be by a wide margin through the quantity of the combination steel pipe of connecting on increasing or reducing the axle power regulation pneumatic cylinder, the extruded article to different positions provides the holding power, make the device can provide the support to the different positions of enclosure wall, support angle can adjust, and convenient use.
The side of the extrusion piece is fixed with a plurality of positioning bolts, the lower end bolt of the combined steel pipe connected to the lower end of the height adjusting hydraulic cylinder is connected with a sliding plate, a plurality of long notches are formed in the side of the sliding plate, and the positioning bolts are arranged inside the long notches in corresponding positions in a sliding mode.
Structure more than adopting, can slide each other between extruded article and the sliding plate, when changing the length of axial force adjusting hydraulic cylinder, the extruded article can the horizontal migration with enclose the wall laminating, and altitude mixture control pneumatic cylinder can not be crooked, the structure is more stable.
Support tight mechanism and include elastic plate, high strength spring and fixed plate, the extruded article is close to the side of enclosure wall and has seted up the notch, and is equipped with the horizontal pole in the notch, and elastic plate is located inside the notch, and the fixed plate is fixed inside the extruded article, and high strength spring's both ends offset with fixed plate and elastic plate respectively.
Structure more than adopting, in-service use, deformation can appear if equipment receives great pressure for a long time, perhaps axle power adjusting hydraulic cylinder length shortens, and the bracing piece is not enough to the pressure of extruded article this moment, and high strength spring can outwards promote springboard and horizontal pole, still can produce less holding power to the enclosure wall, can not break away from the enclosure wall completely, leads to the holding power to disappear.
The reminding mechanism comprises a cylinder, the cylinder is fixed inside an extrusion part, a piston plate is arranged inside the cylinder in a sliding mode, marking liquid is filled inside the cylinder, a moving rod is fixed at the side end of the piston plate, a push rod is fixed at the upper end of an elastic plate, the upper end of the push rod is connected with the moving rod, a one-way leading-in pipe is arranged at the upper end of the cylinder, and a one-way leading-out pipe is arranged at the side end of the cylinder.
Structure more than adopting, when installation device, the extruded article is close to the enclosure wall direction, the elastic plate is promoted by the horizontal pole and is close to being close to the fixed plate direction, piston plate removes to the drum outside under the drive of push rod, the one-way leading-in pipe of accessible adds the mark liquid to drum inside this moment, when diagonal brace length diminishes, under high strength spring's effect, the extruded article removes to the direction of keeping away from the enclosure wall, the push rod drives piston plate to the inside extrusion of drum this moment, make the mark liquid flow through one-way leading-out pipe, remind the emergency guard, need increase the length that the pneumatic cylinder was adjusted to axial force, guarantee to strut the quality.
The one end that the movable rod kept away from the piston plate is fixed with first magnetic path, and inlays on the fixed plate and is equipped with the second magnetic path with first magnetic path actuation mutually, has seted up the spout on the movable rod, and the upper end of push rod slides and sets up inside the spout, is connected with the extension spring between piston plate and the drum bottom.
By adopting the structure, when the length change of the diagonal brace is small, the push rod moves in the sliding groove, the first magnetic block and the second magnetic block are mutually adsorbed, so that the piston plate cannot move, when the length change of the diagonal brace is large, the push rod slides to the other end of the sliding groove and drives the moving rod to move, so that the first magnetic block and the second magnetic block are separated, at the moment, the piston plate moves for a long distance under the action of the tension spring, and a large amount of marking liquid is extruded from the one-way delivery pipe, so that the marking liquid is more striking, and the reminding effect is increased.
And a sealing ring is fixed at the edge of the piston plate and is abutted against the inner wall of the cylinder.
By adopting the structure, the sealing ring can increase the sealing property between the piston plate and the cylinder and increase the stability in long-term use.
Compared with the prior art, this multidirectional adjustable combination formula steel pipe diagonal cast props has following advantage:
1. through the supporting main body, the device can provide the support to the different positions of enclosure wall, and support angle can be adjusted, facilitates the use, assembles the supporting main body through the combination steel pipe, can dismantle the decomposition, convenient transportation.
2. The inclined supporting rod always has certain supporting force on the enclosure wall through the abutting mechanism, the supporting force is prevented from being completely disappeared, and the supporting effect is improved.
3. Reminding the security personnel through reminding the mechanism and in time adjusting the length of axial force adjustment pneumatic cylinder according to in-service behavior, guaranteeing to strut the quality, through first magnetic path, second magnetic path and extension spring cooperation, extrude a large amount of marking fluid for marking fluid is more striking, increases and reminds the effect.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a partial schematic of the present invention;
FIG. 3 is a schematic structural view of a part of the components of the present invention;
FIG. 4 is a schematic structural view of an extrusion of the present invention;
FIG. 5 is a schematic view in partial cross-section of an extrusion of the present invention;
FIG. 6 is a schematic view, partly in section, of the reminder mechanism according to the invention;
in the figure: 1. an enclosure wall; 2. a base plate; 3. a support body; 301. a support rudder; 302. a support edge; 303. a height adjusting hydraulic cylinder; 304. combining the steel pipes; 305. an extrusion member; 306. an axial force adjusting hydraulic cylinder; 307. a hinge joint; 308. a groove; 309. a sliding plate; 310. positioning a bolt; 311. a long slot opening; 312. a recess; 4. a tightening mechanism; 401. a cross bar; 402. an elastic plate; 403. a fixing plate; 404. a high-strength spring; 5. a reminder mechanism; 501. a cylinder; 502. a piston plate; 503. a travel bar; 504. a push rod; 505. a one-way ingress pipe; 506. a unidirectional delivery pipe; 507. a seal ring; 508. a first magnetic block; 509. a second magnetic block; 510. a chute; 511. a tension spring.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Referring to fig. 1-6, the embodiment provides a multidirectional adjustable combined type steel pipe inclined throwing support, which comprises a retaining wall 1 and a bottom plate 2, wherein a support main body 3 is arranged between the retaining wall 1 and the bottom plate 2, the support main body 3 comprises a height adjusting hydraulic cylinder 303 and an axial force adjusting hydraulic cylinder 306, a support edge 302 is fixed at the upper end of the retaining wall 1, a support rudder 301 is fixed on the bottom plate 2, the height adjusting hydraulic cylinder 303 is connected below the support edge 302 through bolts, the lower end of the height adjusting hydraulic cylinder 303 is sequentially connected with a plurality of combined steel pipes 304 through bolts, the lower end of each combined steel pipe 304 is slidably connected with an extrusion piece 305, a plurality of combined steel pipes 304 are sequentially connected on an output shaft of the axial force adjusting hydraulic cylinder 306 through bolts, the axial force adjusting hydraulic cylinder 306 and the combined steel pipes 304 connected with the axial force adjusting hydraulic cylinder form an inclined strut, rudder hinge joints 307 are respectively fixed at two ends of the support strut, grooves 308 are respectively arranged on the support hydraulic cylinder 301 and the extrusion piece 305, two hinge joints 307 are respectively clamped inside the two grooves 308, and a pressing mechanism 4 and a reminding mechanism 5 are arranged inside the extrusion piece 305; the height of extruded piece 305 is adjusted to the small amplitude through altitude mixture control pneumatic cylinder 303, the height of regulation extruded piece 305 that can be by a wide margin through the quantity of the combination steel pipe 304 that increases or reduces connection on the altitude mixture control pneumatic cylinder 303, and then the support position to enclosure wall 1 is adjusted, the holding power and the length of diagonal brace are adjusted to the small amplitude through axle power adjustment pneumatic cylinder 306, the length of regulation diagonal brace that can be by a wide margin through the quantity of the combination steel pipe 304 that increases or reduces connection on the axle power adjustment pneumatic cylinder 306, extruded piece 305 to different positions provides the holding power, make the device can provide the support to enclosure wall 1's different positions, the holding angle can be adjusted, and convenient use.
A plurality of positioning bolts 310 are fixed at the side end of the extrusion piece 305, a sliding plate 309 is connected with the lower end bolt of the combined steel pipe 304 connected to the lower end of the height adjusting hydraulic cylinder 303, a plurality of long notches 311 are formed in the side end of the sliding plate 309, and the positioning bolts 310 are arranged in the corresponding long notches 311 in a sliding manner; the extruded part 305 and the sliding plate 309 can slide mutually, when the length of the axial force adjusting hydraulic cylinder 306 is changed, the extruded part 305 can move horizontally and be attached to the enclosure wall 1, the height adjusting hydraulic cylinder 303 cannot be inclined, and the structure is more stable.
The abutting mechanism 4 comprises an elastic plate 402, a high-strength spring 404 and a fixing plate 403, a notch 312 is formed in the side end, close to the enclosure wall 1, of the extrusion piece 305, a cross bar 401 is arranged in the notch 312, the elastic plate 402 is located inside the notch 312, the fixing plate 403 is fixed inside the extrusion piece 305, and two ends of the high-strength spring 404 abut against the fixing plate 403 and the elastic plate 402 respectively; in practical use, the equipment may deform due to a long-term large pressure, or the length of the axial force adjusting hydraulic cylinder 306 is shortened, at this time, the pressure of the inclined strut on the extrusion part 305 is insufficient, the high-strength spring 404 pushes the elastic plate 402 and the cross rod 401 outwards, a small supporting force can still be generated on the enclosure wall 1, the elastic plate cannot completely separate from the enclosure wall 1, and the supporting force disappears.
The reminding mechanism 5 comprises a cylinder 501, the cylinder 501 is fixed inside the extrusion part 305, a piston plate 502 is arranged inside the cylinder 501 in a sliding mode, marking liquid is filled inside the cylinder 501, a moving rod 503 is fixed at the side end of the piston plate 502, a push rod 504 is fixed at the upper end of the elastic plate 402, the upper end of the push rod 504 is connected with the moving rod 503, a one-way inlet pipe 505 is arranged at the upper end of the cylinder 501, and a one-way outlet pipe 506 is arranged at the side end of the cylinder 501; when the device is installed, the extrusion part 305 approaches the direction of the enclosure wall 1, the elastic plate 402 is pushed by the cross rod 401 and approaches the direction of the fixing plate 403, the piston plate 502 moves towards the outer side of the cylinder 501 under the driving of the push rod 504, at the moment, the marking liquid can be added into the cylinder 501 through the one-way inlet pipe 505, when the length of the inclined strut is reduced, the extrusion part 305 moves towards the direction away from the enclosure wall 1 under the action of the high-strength spring 404, at the moment, the push rod 504 drives the piston plate 502 to extrude towards the inner part of the cylinder 501, so that the marking liquid flows out through the one-way outlet pipe 506, a safety officer is reminded, the length of the axial force adjusting hydraulic cylinder 306 needs to be increased, and the supporting quality is guaranteed.
A first magnet 508 is fixed at one end of the movable rod 503 far away from the piston plate 502, a second magnet 509 which is attracted with the first magnet 508 is embedded on the fixed plate 403, a sliding groove 510 is formed in the movable rod 503, the upper end of the push rod 504 is slidably arranged in the sliding groove 510, and a tension spring 511 is connected between the piston plate 502 and the bottom of the cylinder 501; when the length change of the diagonal rod is small, the push rod 504 moves in the sliding groove 510, the first magnetic block 508 and the second magnetic block 509 are mutually adsorbed, so that the piston plate 502 cannot move, when the length change of the diagonal rod is large, the push rod 504 slides to the other end of the sliding groove 510 and drives the moving rod 503 to move, so that the first magnetic block 508 and the second magnetic block 509 are separated, at the moment, the piston plate 502 moves for a long distance under the action of the tension spring 511, and a large amount of marking liquid is extruded from the one-way delivery pipe 506, so that the marking liquid is more striking, and the reminding effect is increased.
A sealing ring 507 is fixed at the edge of the piston plate 502, and the sealing ring 507 is abutted against the inner wall of the cylinder 501; the seal 507 can increase the sealing between the piston plate 502 and the cylinder 501, increasing stability over long-term use.
The fixing modes are all the most common fixing connection modes in the field, such as welding, bolt connection and the like; the above elements such as the height adjusting hydraulic cylinder 303, the axial force adjusting hydraulic cylinder 306, the one-way leading-in pipe 505, the one-way leading-out pipe 506 and the like are all products in the prior art, and can be directly purchased and used in the market, and the detailed principle is not repeated.
The working principle of the invention is as follows:
when in use, the number of the combined steel pipes 304 which need to be connected with the height adjusting hydraulic cylinder 303 is determined according to the height, then the height adjusting hydraulic cylinder 303 is fixed, then the diagonal brace with proper length is assembled according to the height of the extrusion part 305, the diagonal brace is adjusted, the cross bar 401 is placed in the notch 312, the axial force adjusting hydraulic cylinder 306 is controlled to push the extrusion part 305 to approach to the enclosure wall 1, in the process, the elastic plate 402 is pushed by the cross bar 401 and approaches to the direction of the fixing plate 403, the piston plate 502 moves towards the outer side of the cylinder 501 under the drive of the push rod 504, at the moment, the marking fluid can be added into the cylinder 501 through the one-way lead-in pipe 505, in long-term use, if the length change of the diagonal brace rod is small, the push rod 504 moves in the sliding groove 510, the first magnetic block 508 and the second magnetic block 509 are mutually adsorbed, so that the piston plate 502 cannot move, when the length change of the diagonal brace rod is large, the push rod 504 slides to the other end of the sliding groove 510 and drives the moving rod 503 to move, so that the first magnetic block 508 and the second magnetic block 509 are separated, at the moment, the piston plate 502 moves for a long distance under the pulling force of the tension spring 511, and a large amount of marking fluid is extruded from the one-way delivery pipe 506, so that a safety worker is reminded of increasing the length of the axial force adjusting hydraulic cylinder 306 to ensure the supporting quality, and when the length of the axial force adjusting hydraulic cylinder 306 is increased, the marking fluid can be continuously injected for subsequent use.
In conclusion, the device can support different positions of the enclosure wall 1 through the support main body 3, the support angle can be adjusted, the use is convenient, the support main body 3 is assembled through the combined steel pipe 304, the disassembly and the disassembly are realized, and the transportation is convenient;
the inclined stay bar always has certain supporting force on the enclosure wall 1 through the abutting mechanism 4, so that the supporting force is prevented from being completely eliminated, and the supporting effect is improved;
reminding the safest through reminding mechanism 5 and in time adjusting the length of axial force adjustment pneumatic cylinder 306 according to in service behavior, guaranteeing to strut the quality, through first magnetic path 508, second magnetic path 509 and extension spring 511 cooperation, extrude a large amount of marking liquid for marking liquid is more striking, increases and reminds the effect.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (4)
1. A multidirectional adjustable combined type steel pipe inclined throwing support comprises a retaining wall (1) and a bottom plate (2), and is characterized in that a support main body (3) is arranged between the retaining wall (1) and the bottom plate (2), the support main body (3) comprises a height adjusting hydraulic cylinder (303) and an axial force adjusting hydraulic cylinder (306), a support edge (302) is fixed at the upper end of the retaining wall (1), a support rudder (301) is fixed on the bottom plate (2), the height adjusting hydraulic cylinder (303) is connected below the support edge (302) through bolts, the lower end of the height adjusting hydraulic cylinder (303) is sequentially connected with a plurality of combined steel pipes (304) through bolts, the lower end of each combined steel pipe (304) is connected with an extrusion part (305) in a sliding manner, a plurality of combined steel pipes (304) are sequentially connected with an output shaft of the axial force adjusting hydraulic cylinder (306), the axial force adjusting hydraulic cylinder (306) and the combined steel pipes (304) connected with the axial force adjusting hydraulic cylinder form a inclined supporting rod, two ends of the supporting rod are respectively fixed with a hinge head (307), the extrusion part (301) and a groove (305) are respectively, two hinge joints (308) are arranged on the support rudder (308), two spring heads (307) are respectively clamped inside two grooves (308), a spring pressing mechanism (404) and a pressing mechanism (402), the side that extruded article (305) is close to enclosure wall (1) has seted up notch (312), and be equipped with horizontal pole (401) in notch (312), elastic plate (402) are located inside notch (312), fixed plate (403) are fixed inside extruded article (305), the both ends of high strength spring (404) offset with fixed plate (403) and elastic plate (402) respectively, remind mechanism (5) including drum (501), drum (501) are fixed inside extruded article (305), and inside slip of drum (501) is provided with piston plate (502), drum (501) are inside to be filled with marker fluid, the side of piston plate (502) is fixed with carriage release lever (503), the upper end of elastic plate (402) is fixed with push rod (504), and the upper end and the carriage release lever (503) of push rod (504) are connected, the upper end of drum (501) is equipped with one-way induction pipe (505), the side of drum (501) is equipped with one-way induction pipe (506).
2. The multidirectional adjustable combined type steel pipe inclined throwing support according to claim 1, wherein a plurality of positioning bolts (310) are fixed at the side ends of the extrusion pieces (305), a sliding plate (309) is connected to the lower end bolt of the combined steel pipe (304) connected to the lower end of the height adjusting hydraulic cylinder (303), a plurality of long notches (311) are formed in the side ends of the sliding plate (309), and the positioning bolts (310) are slidably arranged in the long notches (311) in corresponding positions.
3. The multidirectional adjustable combined type steel pipe inclined throwing support is characterized in that a first magnetic block (508) is fixed at one end, away from a piston plate (502), of a moving rod (503), a second magnetic block (509) attracted with the first magnetic block (508) is embedded in a fixing plate (403), a sliding groove (510) is formed in the moving rod (503), the upper end of a push rod (504) is arranged inside the sliding groove (510) in a sliding mode, and a tension spring (511) is connected between the piston plate (502) and the bottom of a cylinder (501).
4. The multidirectional adjustable combined type steel pipe inclined throwing support according to claim 1 or 3, wherein a sealing ring (507) is fixed to the edge of the piston plate (502), and the sealing ring (507) abuts against the inner wall of the cylinder (501).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111025150.4A CN113605408B (en) | 2021-09-02 | 2021-09-02 | Multidirectional adjustable combination formula steel pipe diagonal throwing props |
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| CN202111025150.4A CN113605408B (en) | 2021-09-02 | 2021-09-02 | Multidirectional adjustable combination formula steel pipe diagonal throwing props |
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