CN114060076B - Shock-proof protection frame for tunnel engineering - Google Patents
Shock-proof protection frame for tunnel engineering Download PDFInfo
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- CN114060076B CN114060076B CN202111194616.3A CN202111194616A CN114060076B CN 114060076 B CN114060076 B CN 114060076B CN 202111194616 A CN202111194616 A CN 202111194616A CN 114060076 B CN114060076 B CN 114060076B
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- rod
- fixedly connected
- sliding
- shock
- placing
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- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 10
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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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
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
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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
- E21D23/03—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support
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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
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
- E21D23/0409—Aligning or guiding means for the supports or for the constitutive parts of the supports
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Acoustics & Sound (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Dampers (AREA)
Abstract
The invention discloses a shockproof protection frame for tunnel engineering, which comprises a placing plate and a top plate, wherein one side of the outer side surface of the placing plate is fixedly connected with a polish rod and a placing groove respectively, a transmission structure is arranged in the placing groove, the transmission structure comprises a primary electric telescopic rod, a rack, a primary gear, a short rod and an elliptic block, the outer side surface of the polish rod is connected with a sliding plate in a sliding manner, and a lifting structure is arranged on one side above the sliding plate. This shock-proof protection frame for tunnel engineering, cooperation through shock-absorbing structure sets up, makes this shock-proof protection frame for tunnel engineering possess the effect that is difficult for the slope to play the effect that improves stability, reach the purpose that can improve shock-proof effect, through the cooperation setting of transmission structure and elevation structure, can adjust this shock-proof protection frame for tunnel engineering indirectly and highly in the in-process of using, and then played convenient, swift effect, reached the purpose of being convenient for adjust.
Description
Technical Field
The invention relates to the technical field of tunnel engineering, in particular to a shockproof protection frame for tunnel engineering.
Background
The tunnel structure comprises a main building and auxiliary equipment. The main building consists of a tunnel body and a tunnel door, and auxiliary equipment comprises a car shelter, a fire-fighting facility, an emergency communication and water-proof facility, and a long tunnel is provided with special ventilation and illumination equipment.
When the blasting construction of tunnel need carry out the grudging post to the tunnel, the vibration resistance of present grudging post is relatively poor, often can appear the condition of slope, prevents that the blasting construction tunnel from collapsing, does not set up the board of preventing weighing down the thing on the current fender bracket construction frame board, and the circumstances of weighing down the thing can appear in the workman's construction, causes the injury of workman or damage to the fender bracket, and the grudging post is inconvenient in addition adjusted after the installation is accomplished, often need demolish the later regulation, and is more loaded down with trivial details. So the existing protection frame has the defects of poor shockproof effect, poor safety coefficient and inconvenient adjustment.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides the shockproof protection frame for tunnel engineering, which has the advantages of good shockproof effect, high safety coefficient, convenient adjustment and the like, and solves the problems of poor shockproof effect, poor safety coefficient and inconvenient adjustment.
(II) technical scheme
In order to achieve the purposes of good shockproof effect, high safety coefficient and convenient adjustment, the invention provides the following technical scheme: the utility model provides a protection frame takes precautions against earthquakes for tunnel engineering, is including placing board and roof, the quantity of placing the board is two, and the medial surface of placing the board is fixedly connected with polished rod and standing groove respectively, the inside of standing groove is provided with transmission structure, transmission structure includes one-level electric telescopic handle, rack, one-level gear, quarter butt and oval piece, lateral surface sliding connection of polished rod has the sliding plate, top one side of sliding plate is provided with elevation structure, elevation structure includes servo motor, lower gear, superior gear, fixed frame and movable frame, movable frame's upper surface fixedly connected with round bar, the upper surface and the roof fixed connection of round bar, the telescopic sleeve board has been cup jointed to the lateral surface of roof, the inside of placing board and roof has all seted up flutedly, the inside of recess is provided with shock-absorbing structure, shock-absorbing structure includes one-level spring, dead lever, sliding block, connecting rod and rectangular frame.
Preferably, the inside wall and the one-level electric telescopic handle fixed connection of standing groove, one-level electric telescopic handle's expansion end terminal surface and rack fixed connection, the inside wall and the rack sliding connection of standing groove, one side and one-level gear engagement of rack, one-level gear's inner wall and quarter butt fixed connection.
Preferably, one end of the short rod is rotationally connected with the placing groove through a bearing, the upper part of the outer side face of the short rod is fixedly connected with the elliptical block, one side of the upper surface of the elliptical block is hinged with a hinge rod through a small rod, and one end of the hinge rod is hinged with the sliding plate through a hinge block.
Preferably, the upper surface of sliding plate and servo motor fixed connection, servo motor's output fixedly connected with disc, the outside face of disc is close to the outside face one side fixed connection of edge through one-level pole and lower gear, upper portion one side and the fixed frame fixed connection of sliding plate, fixed frame's inner wall and one-level pole rotate to be connected.
Preferably, one side of the outer side surface of the lower gear is meshed with the upper gear, the inner wall of the upper gear is movably connected with the movable frame through a second-stage rod, the outer side surface of the round rod is slidably connected with the fixed frame, and the number of the lifting structures is four in total and is arranged in a rectangular array mode.
Preferably, the lower surface of placing the board has seted up concave groove, the inner wall and the rectangular frame sliding connection of concave groove, the sliding groove has been seted up at the interior bottom wall middle part of rectangular frame, rectangular frame's inside wall and dead lever fixed connection.
Preferably, the lateral surface of dead lever passes through pole setting and rectangular frame's interior bottom wall fixed connection, the lateral surface and the sliding block sliding connection of dead lever, the lateral surface and the connecting rod swing joint of sliding block, the quantity of sliding block and connecting rod is two, and the symmetric distribution, the lower surface of sliding block passes through sliding lever and sliding groove sliding connection.
Preferably, one end of the connecting rod is hinged with the inside of the placing plate through a hinge seat, two sliding blocks are fixedly connected with the primary springs, the number of the damping structures is four, and the damping structures are arranged in a rectangular array mode.
Preferably, the lateral surface one side of roof and flexible sleeve plate all is provided with the couple, a side of couple can be dismantled and be connected with the shielding plate, place the quantity of board, flexible sleeve plate and be two, and the symmetric distribution, the quantity of roof counts totally for four, and is rectangular array's form and arrange.
(III) beneficial effects
Compared with the prior art, the invention provides a shockproof protection frame for tunnel engineering, which comprises the following components
The beneficial effects are that:
1. this shock-proof protection frame for tunnel engineering, cooperation through shock-absorbing structure sets up, makes this shock-proof protection frame for tunnel engineering possess the effect that is difficult for the slope to play the effect that improves stability, reach the purpose that can improve shock-proof effect, through the cooperation setting of transmission structure and elevation structure, can adjust this shock-proof protection frame for tunnel engineering indirectly and highly in the in-process of using, and then played convenient, swift effect, reached the purpose of being convenient for adjust.
2. This protection frame takes precautions against earthquakes for tunnel engineering, through the setting of roof and flexible sleeve board, make this protection frame takes precautions against earthquakes for tunnel engineering possess the effect that supports the weighing object to avoid appearing weighing object and drop the condition of injuring the people by a smash, through the setting of couple and shielding plate, can hang debris on the couple in the use, also can shelter from the hole through the shielding plate in addition, and then played the effect of reduction danger coefficient, reached the purpose that improves factor of safety.
Drawings
Fig. 1 is a schematic diagram of a three-dimensional front view structure of a shockproof protection frame for tunnel engineering;
fig. 2 is a schematic diagram of a front view structure of a shockproof protection frame for tunnel engineering;
FIG. 3 is a schematic diagram of a three-dimensional side view cross-sectional structure of a shockproof protection frame for tunnel engineering;
fig. 4 is a schematic diagram of a structure of a shockproof protection frame for tunnel engineering in a three-dimensional top cross-section;
fig. 5 is an enlarged schematic view of the structure of the shock-proof protection frame for tunnel engineering in fig. 2 at a position a.
In the figure: 1. placing a plate; 2. a top plate; 3. a placement groove; 4. a transmission structure; 401. a first-stage electric telescopic rod; 402. a rack; 403. a primary gear; 404. a short bar; 405. an elliptic block; 5. a sliding plate; 6. a lifting structure; 601. a servo motor; 602. a lower gear; 603. an upper gear; 604. a fixed frame; 605. a moving frame; 7. a shock absorbing structure; 701. a primary spring; 702. a fixed rod; 703. a sliding block; 704. a connecting rod; 705. a rectangular frame; 8. a round bar; 9. a telescopic sleeve plate; 10. a hinge rod; 11. a disc; 12. and (5) a polish rod.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-5, a shock-proof protection frame for tunnel engineering comprises two placement plates 1 and a top plate 2, wherein the inner side surfaces of the placement plates are fixedly connected with a polish rod and a placement groove respectively, a transmission structure 4 is arranged in the placement groove 3, the transmission structure 4 comprises a primary electric telescopic rod 401, a rack 402, a primary gear 403, a short rod 404 and an oval block 405, the inner side wall of the placement groove 3 is fixedly connected with the primary electric telescopic rod 401, the movable end surface of the primary electric telescopic rod 401 is fixedly connected with the rack 402, the inner side wall of the placement groove 3 is in sliding connection with the rack 402, one side surface of the rack 402 is meshed with the primary gear 403, the inner wall of the primary gear 403 is fixedly connected with the short rod 404, one end of the short rod 404 is in rotary connection with the placement groove 3 through a bearing, the upper part of the outer side surface of the short rod 404 is fixedly connected with the oval block 405, one side of the upper surface of the oval block 405 is hinged with a hinging rod 10 through a small rod, one end of a hinging rod 10 is hinged with a sliding plate 5 through a hinging block, the outer side face of a polished rod 12 is connected with the sliding plate 5 in a sliding way, one side above the sliding plate 5 is provided with a lifting structure 6, the lifting structure 6 comprises a servo motor 601, a lower gear 602, an upper gear 603, a fixed frame 604 and a movable frame 605, the upper surface of the sliding plate 5 is fixedly connected with the servo motor 601, the output end of the servo motor 601 is fixedly connected with a disc 11, the position, close to the edge, of the outer side face of the disc 11 is fixedly connected with one side of the outer side face of the lower gear 602 through a first-stage rod, one side of the upper side of the sliding plate 5 is fixedly connected with the fixed frame 604, the inner wall of the fixed frame 604 is rotationally connected with the first-stage rod, one side of the outer side face of the lower gear 602 is meshed with the upper gear 603, the inner wall of the upper gear 603 is movably connected with the movable frame 605 through a second-stage rod, the lateral surface and the fixed frame 604 sliding connection of round bar 8, the quantity of elevation structure 6 is totally four, and be rectangular array's form and arrange, the upper surface fixedly connected with round bar 8 of movable frame 605, round bar 8's upper surface and roof 2 fixed connection, telescopic sleeve plate 9 has been cup jointed to roof 2's lateral surface, place the inside of board 1 and roof 2 all sets up flutedly, the inside of recess is provided with shock-absorbing structure 7, shock-absorbing structure 7 includes one-level spring 701, dead lever 702, sliding block 703, connecting rod 704 and rectangular frame 705, the concave groove has been seted up to the lower surface of placing board 1, the inner wall in concave groove and rectangular frame 705 sliding connection, the inner wall middle part of rectangular frame 705 has been seted up the sliding groove, rectangular frame 705's inside wall and dead lever 702 fixed connection, the lateral surface of dead lever 702 passes through pole setting and rectangular frame 705's inner bottom wall fixed connection, the lateral surface and the sliding block 703 sliding connection, the lateral surface of sliding block 703 and connecting rod 704 movable connection, the quantity of sliding block 703 and connecting rod 704 are two, and symmetrical distribution, the lower surface of sliding block 703 is through the sliding block 703 and sliding block 702, the sliding block is the one end is arranged with the four, the four-dimensional form is realized, the four-diameter of the diameter meter is arranged, the four-side surface is arranged, the four-dimensional meter is arranged with the side of the sliding block 9, the four-shaped meter is arranged, the diameter meter is arranged, and the one end is arranged, the four-dimensional meter is arranged, and has two quantities of the diameter meter is arranged, and has two, and is arranged.
When using, the user is assembled this tunnel engineering with protection frame that takes precautions against earthquakes earlier and is accomplished, afterwards, can drive rack 402 through one-level electric telescopic handle 401 and remove, and then drive oval piece 405 through one-level gear 403 and quarter butt 404 and rotate, thereby drive slide bar 5 through articulated handle 10 and move to one side on polished rod 12, then stop the extension of one-level electric telescopic handle 401 after waiting the suitable back in position, afterwards start servo motor 601, servo motor 601's output drives disc 11 rotation, disc 11 drives upper and lower stage gear 602 rotation, lower stage gear 602 drives upper stage gear 603 rotation, thereby drive round bar 8 through moving frame 605 upwards in fixed frame 604, at this moment adjust the height of roof 2, and then the effect that can adjust width and height according to the demand has been reached, when place board 1 and ground contact and roof 2 and tunnel inner roof contact, then can make connecting rod 704 rotate to one side, at this moment slide bar 702 moves to one side, and stretch one-level spring 701, simultaneously, make this protection frame for engineering easy to move up and lower stage gear 602 rotates, thereby can not hang the effect that can be reached in addition, the safety factor of the safety and stability can be reached, the safety and stability of the purpose is reached, the safety factor of the safety is realized.
In sum, this shock-proof fender bracket for tunnel engineering, cooperation through shock-absorbing structure 7 sets up, make this shock-proof fender bracket for tunnel engineering possess the effect that is difficult for the slope, thereby play the effect that improves stability, reach the purpose that can improve shock-proof effect, through the cooperation setting of transmission structure 4 and elevation structure 6, can adjust this shock-proof fender bracket for tunnel engineering indirectly and highly in the in-process of using, and then play convenient, swift effect, the purpose of being convenient for adjust has been reached, through the setting of roof 2 and flexible sleeve plate 9, make this shock-proof fender bracket for tunnel engineering possess the effect of supporting the weight thing, thereby avoid appearing the condition that the weight thing dropped and stabled the people, through the setting of couple and shielding plate, can hang debris on the couple at the in-process of use, in addition also can shelter from the hole through shielding plate, and then play the effect of reducing danger coefficient, the purpose of improving factor has been reached.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. The utility model provides a tunnel engineering is with protection frame that takes precautions against earthquakes, including placing board (1) and roof (2), its characterized in that: the number of the placing plates (1) is two, the inner side surfaces of the placing plates (1) are respectively and fixedly connected with a polish rod (12) and a placing groove (3), and a transmission structure (4) is arranged in the placing groove (3);
the transmission structure (4) comprises a primary electric telescopic rod (401), a rack (402), a primary gear (403), a short rod (404) and an oval block (405), wherein the inner side wall of the placement groove (3) is fixedly connected with the primary electric telescopic rod (401), the movable end face of the primary electric telescopic rod (401) is fixedly connected with the rack (402), the inner side wall of the placement groove (3) is slidably connected with the rack (402), one side face of the rack (402) is meshed with the primary gear (403), and the inner wall of the primary gear (403) is fixedly connected with the short rod (404); one end of the short rod (404) is rotationally connected with the placing groove (3) through a bearing, the upper part of the outer side surface of the short rod (404) is fixedly connected with the elliptical block (405), the left side and the right side of the upper surface of the elliptical block (405) are hinged with the hinging rods (10) through small rods, one end of each hinging rod (10) is hinged with the sliding plate (5) through the hinging block, and the number of the sliding plates (5) and the number of the hinging rods (10) are two;
the utility model discloses a high-speed hydraulic lifting device for a polished rod, including polished rod (12), sliding plate (5) are connected with to lateral surface sliding of polished rod (12), top one side of sliding plate (5) is provided with elevation structure (6), elevation structure (6) include servo motor (601), lower gear (602), upper gear (603), fixed frame (604) and movable frame (605), the upper surface fixedly connected with round bar (8) of movable frame (605), the upper surface and roof (2) fixed connection of round bar (8), telescopic sleeve plate (9) have been cup jointed to the lateral surface of roof (2), the inside of placing board (1) and roof (2) is all seted up flutedly, the inside of recess is provided with shock-absorbing structure (7), shock-absorbing structure (7) include one-level spring (701), dead lever (702), sliding block (703), connecting rod (704) and rectangular frame (705);
the upper surface of the sliding plate (5) is fixedly connected with a servo motor (601), the output end of the servo motor (601) is fixedly connected with a disc (11), the position, close to the edge, of the outer side of the disc (11) is fixedly connected with one side of the outer side of a lower gear (602) through a first-stage rod, one side of the upper part of the sliding plate (5) is fixedly connected with a fixed frame (604), the inner wall of the fixed frame (604) is rotationally connected with the first-stage rod, one side of the outer side of the lower gear (602) is meshed with an upper gear (603), the inner wall of the upper gear (603) is movably connected with a movable frame (605) through a second-stage rod, the outer side of a round rod (8) is slidably connected with the fixed frame (604), and the number of lifting structures (6) is four and is arrayed in a rectangular array mode;
the utility model discloses a shock-absorbing structure is characterized in that a concave groove is formed in the lower surface of a placing plate (1), the inner wall of the concave groove is in sliding connection with a rectangular frame (705), the sliding groove is formed in the middle of the inner bottom wall of the rectangular frame (705), the inner side wall of the rectangular frame (705) is fixedly connected with a fixed rod (702), the outer side surface of the fixed rod (702) is fixedly connected with the inner bottom wall of the rectangular frame (705) through a vertical rod, the outer side surface of the fixed rod (702) is in sliding connection with a sliding block (703), the outer side surface of the sliding block (703) is movably connected with a connecting rod (704), the number of the sliding block (703) and the number of the connecting rod (704) are two, the sliding blocks (703) are symmetrically distributed, one end of the connecting rod (704) is hinged with the inner side of the placing plate (1) through a hinged seat, the two sliding blocks (703) are fixedly connected with a primary spring (701), and the number of shock-absorbing structure (7) is four in total and is arrayed in a rectangular shape.
2. The earthquake-proof fender bracket for tunnel engineering according to claim 1, wherein: the utility model discloses a flexible board, including roof (2) and flexible sleeve board (9), roof (2) and flexible sleeve board (9) lateral surface one side all is provided with the couple, a side of couple can be dismantled and be connected with the shielding plate, the quantity of placing board (1), flexible sleeve board (9) is two, and the symmetric distribution, the quantity of roof (2) is counted totally to four, and is rectangular array's form and arranges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111194616.3A CN114060076B (en) | 2021-10-13 | 2021-10-13 | Shock-proof protection frame for tunnel engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111194616.3A CN114060076B (en) | 2021-10-13 | 2021-10-13 | Shock-proof protection frame for tunnel engineering |
Publications (2)
| Publication Number | Publication Date |
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| CN114060076A CN114060076A (en) | 2022-02-18 |
| CN114060076B true CN114060076B (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111194616.3A Active CN114060076B (en) | 2021-10-13 | 2021-10-13 | Shock-proof protection frame for tunnel engineering |
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