CN112983515A - Supporting device for tunnel portal construction and construction method thereof - Google Patents
Supporting device for tunnel portal construction and construction method thereof Download PDFInfo
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- CN112983515A CN112983515A CN202110318643.0A CN202110318643A CN112983515A CN 112983515 A CN112983515 A CN 112983515A CN 202110318643 A CN202110318643 A CN 202110318643A CN 112983515 A CN112983515 A CN 112983515A
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- fixedly connected
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D19/00—Provisional protective covers for working space
- E21D19/04—Provisional protective covers for working space for use in drifting galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention relates to a supporting device for tunnel portal construction and a construction method thereof, belonging to the technical field of tunnel portal construction and disclosing a supporting device for tunnel portal construction, wherein the top of a base is fixedly connected with two symmetrically arranged sleeves, the inner wall of one side of each sleeve is slidably connected with a lifting rod, one side of each lifting rod is provided with a fixing component for fixing the lifting rod, the tops of the two lifting rods are fixedly connected with a same semicircular supporting plate, and the inner wall of the semicircular supporting plate is fixedly connected with a first fixing plate. The safety of constructors is protected to a great extent, the structure is simple, and the operation is convenient.
Description
Technical Field
The invention belongs to the technical field of tunnel portal construction, and relates to a supporting device for tunnel portal construction and a construction method thereof.
Background
The tunnel portal is used for keeping stability of a tunnel entrance elevation slope and a cutting slope; collecting and discharging ground water flow; is convenient for building construction treatment. The main form of the tunnel portal is 1, ring frame type portal. The lining is slightly extended out of the hole to increase the thickness of the lining to form a hole ring frame, and the method is suitable for occasions with hard stone at the hole, steep terrain and no drainage requirement. 2. End wall type tunnel portal. The method is suitable for the openings with wide terrain and basically stable stratum; the device has the functions of supporting the uphill slope of the hole and collecting and discharging water flow of the uphill slope. 3. Wing wall type tunnel portal. The side surface of the end wall is additionally provided with the wing wall, so that the end wall is supported, the stability of the cutting slope is protected, and the end wall is suitable for the openings with poor geological conditions; the top surface of the wing wall is consistent with the extension surface of the upward slope, and a ditch is arranged on the wing wall to drain surface water collected by the upward slope and the top of the tunnel into the cutting ditch. In addition, when the terrain is steep, the geological condition is poor, and the wing wall type portal is limited by the terrain condition, the end wall can be provided with the pier to increase the stability of the end wall, and the portal is called a column type portal. It is beautiful and suitable for suburbs, scenic spots or tunnel portals. In the mountainous area, in order to reduce the excavation height of the upward slope and reduce the excavation amount of earth and stone, the top of the headwall can be made into a step shape which is matched with the slope of the earth surface, and the step type tunnel portal is called.
The supporting device is needed to be used during tunnel portal construction, but the existing supporting device cannot be well attached to the tunnel portal, so that the supporting effect is not ideal, the top of the tunnel is provided with a certain slope and is uneven, the effective contact surface between the existing supporting device and the top of the tunnel portal is small, the supporting effect can be reduced, the function of protecting falling rocks is not achieved, timely alarming cannot be achieved when the falling rocks occur, and the safety coefficient is low, so that the supporting device and the construction method for tunnel portal construction are provided, and the problem mentioned above is solved.
Disclosure of Invention
In view of the above, the invention provides a supporting device for tunnel portal construction and a construction method thereof, in order to solve the problems that the existing supporting device for tunnel portal construction cannot adapt to portals with different slopes and is narrow in application range.
In order to achieve the purpose, the invention provides the following technical scheme:
a supporting device for tunnel portal construction comprises a base, wherein the top of the base is fixedly connected with two symmetrically arranged sleeves, the inner wall of one side of each sleeve is connected with a lifting rod in a sliding manner, one side of each lifting rod is provided with a fixing component for fixing the lifting rod, the tops of the two lifting rods are fixedly connected with the same semicircular supporting plate, the inner wall of the semicircular supporting plate is fixedly connected with a first fixing plate, the bottom of the first fixing plate is provided with a lifting component for lifting the first fixing plate, the top of the base is fixedly connected with a bearing, the inner wall of the bearing is rotatably connected with a rotary drum, the outer part of the rotary drum is provided with a driving component for driving the lifting component, the top of the semicircular supporting plate is fixedly connected with a reinforcing plate, and the top of the semicircular supporting plate is provided with an adjusting component for adapting to a portal, and alarm components for sending out danger information are fixedly connected to the two sides of the semicircular supporting and protecting plate.
Further, the fixing component comprises a plurality of clamping grooves arranged on one side of the lifting rod and a plurality of clamping blocks connected to one side of the sleeve in a sliding manner, the clamping block is clamped with the clamping groove, one end of the clamping block penetrates through the sleeve and is fixedly connected with a first pulling plate, the outer wall of the clamping block is fixedly sleeved with a sleeve plate, one side of the sleeve plate is fixedly connected with a second spring, one end of each second spring is fixedly connected with the same second pulling plate, one side of the sleeve is fixedly connected with two limiting rods which are symmetrically arranged, one side of each limiting rod is abutted against one side of the second pulling plate, a plurality of clamping blocks penetrate through the second pulling plate, the second spring is sleeved on the clamping block, the inner part of the second pulling plate is in threaded connection with two symmetrically arranged bolts, the bolt is in threaded connection with the limiting rod and used for ensuring that the lifting rod cannot fall down easily, and therefore the stability of the lifting device is improved.
Further, the lifting assembly comprises a fixed box fixedly connected to the bottom of the first fixed plate, the bottom of the fixed box is fixedly connected with a second screw rod, the outer wall of the second screw rod is in threaded connection with the inner wall of the rotary drum, one side of the two sleeves, which are close to each other, is fixedly connected with a first fixed block, one side of the first fixed block is rotatably connected with a connecting rod, one end of the connecting rod is rotatably connected with a second fixed block, the top of the second fixed block is fixedly connected with a first slide block, the bottom of the first fixed plate is fixedly connected with a first slide rail which is matched with the first slide block, the first slide rail is in sliding connection with the first slide block, the inner wall of one side of the sleeve is fixedly connected with a fourth slide rail, one side of the lifting rod is fixedly connected with a fourth slide block which is matched with the fourth slide rail, and the fourth slide, for improving the stability of the first fixing plate.
Furthermore, the lifting component also comprises two push rods fixedly connected to one side of the two second fixed blocks, one end of each push rod, which is close to each other, penetrates through the fixed box and extends into the fixed box, the top inner wall and the bottom inner wall of the fixed box are fixedly connected with the same second fixed plate, one end of each push rod, which is close to each other, is fixedly connected with a sliding plate, one side of each sliding plate, which is close to each other, is fixedly connected with two first tension springs which are symmetrically arranged, one end of each first tension spring is fixedly connected with two sides of the second fixed plate respectively, the top inner wall of the fixed box is fixedly connected with two second slide rails which are symmetrically arranged, the top of each sliding plate is fixedly connected with a second slide block which is matched with the second slide rails, the second slide blocks are slidably connected with the second slide rails, and the inner walls at two sides of the fixed box are fixedly connected, the slide bar runs through second fixed plate and sliding plate, slide bar and sliding plate sliding connection for the second fixed block can not kick-back easily, and then improves the stability of device.
Further, the drive assembly comprises a drive box fixedly connected to the top of the base and a second gear fixedly sleeved on the outer wall of the rotary drum, a forward and reverse rotating motor is fixedly connected to the inner wall of the bottom of the drive box, a rotating shaft is fixedly connected to an output shaft of the forward and reverse rotating motor, a first gear is fixedly connected to the top of the rotating shaft and penetrates through the drive box, the first gear is meshed with the second gear, lifting of the device is achieved without manpower, and work burden of workers is reduced.
Furthermore, the adjusting part comprises a first screw rod connected to the top of the semicircular supporting plate through a plurality of threads, the top of the first screw rod is connected with a lug in a rotating mode, two second tension springs and two second tension springs are symmetrically arranged on one side of the lug, one end of each second tension spring is fixedly connected to one side of the semicircular supporting plate, and the bottom of the first screw rod penetrates through the semicircular supporting plate and the fixedly connected hand wheel, so that the contact surface between the device and the top of the opening is larger, and the supporting effect is better.
Further, the alarm subassembly includes the acousto-optic alarm of two fixed connection at the third fixed plate of semi-circular supporting plate both sides and two fixed connection in semi-circular supporting plate both sides, the top fixedly connected with micro-gap switch and the first spring of third fixed plate, micro-gap switch and acousto-optic alarm electric connection, the equal sliding connection in both sides of semi-circular supporting plate has the supporting shoe, the bottom of supporting shoe and the top fixed connection of first spring, the bearing plate that the top fixedly connected with slope of supporting shoe set up, one side fixedly connected with third slider of supporting shoe, the third slide rail of one side fixedly connected with and third slider looks adaptation of semi-circular supporting plate, third slide rail and third slider sliding connection for remind constructor in time to investigate or withdraw, factor of safety is high.
Further, a plurality of constant head tanks have been seted up to the bottom of lifter, a plurality of locating pieces of telescopic bottom inner wall fixedly connected with, locating piece and constant head tank looks adaptation prevent that the lifter from taking place the skew at the lift in-process.
Further, two second backup pads that the top fixedly connected with symmetry of first fixed plate set up, two the top of second backup pad all with the top inner wall fixed connection of semi-circular backplate, two the equal fixedly connected with third backup pad in one side that the second backup pad was kept away from each other, the one end of third backup pad and one side inner wall fixed connection of semi-circular backplate, two the same first backup pad of one side fixedly connected with that the second backup pad is close to each other is triangle-shaped between first backup pad, second backup pad and the third backup pad, and stability is good, has promoted the effect of strutting of device.
The construction method of the supporting device for tunnel portal construction comprises the following steps:
s1, moving the device to a tunnel entrance, starting a forward and reverse rotation motor to enable the forward and reverse rotation motor to rotate forward, enabling an output shaft of the forward and reverse rotation motor to drive a rotating shaft to rotate, enabling the rotating shaft to drive a first gear to rotate, enabling the first gear to drive a second gear to rotate, enabling the second gear to drive a rotating drum to rotate, enabling the rotating drum to drive a second screw to move vertically upwards, enabling the second screw to drive a fixed box to move vertically upwards, enabling the fixed box to drive a first fixed plate to move vertically upwards, and enabling the first fixed plate to drive a semicircular supporting plate to move vertically upwards;
s2, the semicircular supporting plate drives the lifting rod to vertically move upwards, the lifting rod pushes the fixture block to transversely move, the fixture block drives the sleeve plate to transversely move, the sleeve plate extrudes the second spring, the fixture block is released from the clamping state with the clamping groove at the moment, the fixture block is reengaged with the clamping groove until the hand wheel is completely attached to the hole, the first fixing plate drives the two connecting rods to rotate and to be away from each other, the connecting rods drive the two push rods to be away from each other, the push rods drive the sliding plate to transversely move, and the sliding plate stretches the first tension;
s3, rotating a hand wheel, wherein the hand wheel drives a first screw rod to move in a direction away from the semicircular supporting guard plate, and the first screw rod drives a lug to move in a direction away from the semicircular supporting guard plate, so that the lug is abutted against the top of the hole to be convenient for adapting to the hole;
s4, when danger is likely to occur when stones fall at the opening, the stones fall on the bearing plate, the bearing plate drives the supporting block to vertically move downwards, the supporting block extrudes the first spring and abuts against the microswitch, the acousto-optic alarm starts to give an alarm to remind constructors of surveying or evacuating in time, and the safety coefficient is high;
s5, when the disassembly is needed, the bolt is screwed out, the second pulling plate is pulled transversely by hands, the second pulling plate drives the first pulling plate to move transversely, the first pulling plate drives the clamping block to move transversely, and then the block state of fixture block and draw-in groove is relieved, the motor that just reverses is started once more and the motor that just reverses, the output shaft of the motor that just reverses drives the pivot and rotates, the pivot drives first gear revolve, first gear drives second gear revolve, the second gear drives the rotary drum and rotates, the rotary drum drives the second screw rod and moves down vertically, the second screw rod drives the fixed box and moves down vertically, the fixed box drives first fixed plate and moves down vertically, first fixed plate drives semi-circular fender board and moves down vertically, semi-circular fender board drives the lifter and moves down vertically, close the motor that just reverses this moment, the bolt of screwing, make fixture block and draw-in groove block once more, be convenient for next use.
The invention has the beneficial effects that:
1. according to the support device for tunnel portal construction, the device is moved to the tunnel portal, the position selectivity is high, the support device can be adjusted according to actual conditions, the semicircular support plate is finally driven to ascend through the forward and reverse rotating motor, the situation that the semicircular support plate needs to be driven to ascend through manpower is avoided, time and labor are wasted, the manual semicircular support plate is not attached to the top end of the tunnel portal in a contact mode, the semicircular support plate driven by the manpower is better in support effect and higher in safety due to the fact that the forward and reverse rotating motor is used for driving the semicircular support plate to ascend.
2. According to the supporting device for tunnel portal construction, after the semicircular supporting plate moves to be in contact with the portal, the clamping blocks are re-meshed with the clamping grooves, the semicircular supporting plate is prevented from moving downwards when the top of the device is subjected to large pressure through the meshing of the clamping blocks and the clamping grooves, the supporting effect is poor, danger is caused, and the arrangement of the clamping blocks ensures that the device cannot easily fall down when a dangerous condition occurs, so that the safety is improved.
3. According to the supporting device for tunnel portal construction, the adjusting assembly is arranged to enable the bump to be abutted to the top of the portal, so that the supporting device is convenient to adapt to the portal, the effective contact area of the device and the portal is larger, the supporting effect is better, and the problem that when the device is arranged at an uneven portal, the effective contact area is too small to guarantee the safety of constructors is avoided.
4. According to the supporting device for tunnel portal construction, when danger is likely to occur due to the fact that stones fall from the portal, the stones fall onto the bearing plate, the bearing plate drives the supporting block to vertically move downwards, the supporting block extrudes the first spring and abuts against the microswitch, at the moment, the acousto-optic alarm starts to give an alarm to remind constructors of surveying or evacuation in time, and the safety coefficient is high.
5. When the support device for tunnel portal construction needs to be disassembled, a bolt is screwed out, a second pulling plate is transversely pulled by hands, the clamping state of a clamping block and a clamping groove is further relieved, a forward and reverse motor is started again to enable the forward and reverse motor to rotate reversely, an output shaft of the forward and reverse motor drives a rotating shaft to rotate, the rotating shaft drives a first gear to rotate, the first gear drives a second gear to rotate, the second gear drives a rotating drum to rotate, the rotating drum drives a second screw to move vertically downwards, the second screw drives a fixing box to move vertically downwards, the fixing box drives a first fixing plate to move vertically downwards, the first fixing plate drives a semicircular support plate to move vertically downwards, the semicircular support plate drives a lifting rod to move vertically downwards, the forward and reverse motor is turned off at the moment, the bolt is screwed, the clamping block and the clamping groove are clamped again, and the support device is convenient to use next time.
6. The supporting device for tunnel portal construction is compact in structure, the lifting function of the whole device can be realized through forward and reverse rotation of the forward and reverse rotation motor, when the device is disassembled, only the bolt needs to be screwed out, the second pulling plate is transversely pulled by hands, the supporting device is quick, convenient, time-saving and labor-saving, the arrangement of the protruding blocks can be suitable for portals with different gradients, the application range is wide, and due to the arrangement of the alarm assembly, the safety of constructors is greatly protected, the structure is simple, and the operation is convenient.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic main sectional view of a supporting device for tunnel portal construction according to the present invention;
FIG. 2 is an enlarged view of portion A of the present invention;
FIG. 3 is a main sectional view schematically showing the construction of the stationary box according to the present invention;
FIG. 4 is a three-dimensional view of the bowl and second screw of the present invention;
FIG. 5 is a three-dimensional view of the reinforcing plate and the semicircular retaining plate of the present invention;
fig. 6 is a schematic side view of a supporting device for tunnel portal construction according to the present invention;
FIG. 7 is an enlarged view of portion B of the present invention;
FIG. 8 is a schematic view showing the connection between the semicircular supporting plate and the first screw in the present invention;
FIG. 9 is a front cross-sectional structural view of the sleeve of the present invention;
fig. 10 is a bottom view of the lifter of the present invention.
Reference numerals: 1. a base; 2. a first gear; 3. a rotating shaft; 4. a positive and negative rotation motor; 5. a drive cartridge; 6. a bearing; 7. a rotating drum; 8. a second gear; 9. a connecting rod; 10. a lifting rod; 11. a reinforcing plate; 12. a first screw; 13. a bump; 14. a semicircular supporting guard plate; 15. a sleeve; 16. a first fixed block; 17. a second screw; 18. a first slide rail; 19. a first slider; 20. a fixed box; 21. a first support plate; 22. a second support plate; 23. a push rod; 24. a third support plate; 25. a second fixed block; 26. a first fixing plate; 27. a slide bar; 28. a second slide rail; 29. a second slider; 30. a second fixing plate; 31. a sliding plate; 32. a first tension spring; 33. a bearing plate; 34. an audible and visual alarm; 35. a microswitch; 36. a third fixing plate; 37. a first spring; 38. a third slide rail; 39. a third slider; 40. a support block; 41. a hand wheel; 42. a fourth slide rail; 43. a fourth slider; 44. positioning blocks; 45. a card slot; 46. a second spring; 47. a clamping block; 48. a first pulling plate; 49. sheathing; 50. a bolt; 51. a second pulling plate; 52. a limiting rod; 53. positioning a groove; 54. the second extension spring.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Example one
As shown in fig. 1-10, a supporting device for tunnel portal construction comprises a base 1, two symmetrically arranged sleeves 15 are fixedly connected to the top of the base 1, a lifting rod 10 is slidably connected to the inner wall of one side of each sleeve 15, a fixing component for fixing the lifting rod 10 is arranged on one side of each lifting rod 10, the top of each lifting rod 10 is fixedly connected with a semicircular supporting plate 14, the inner wall of each semicircular supporting plate 14 is fixedly connected with a first fixing plate 26, a lifting component for lifting the first fixing plate 26 is arranged at the bottom of the first fixing plate 26, a bearing 6 is fixedly connected to the top of the base 1, a rotating drum 7 is rotatably connected to the inner wall of the bearing 6, a driving component for driving the lifting component is arranged outside the rotating drum 7, a reinforcing plate 11 is fixedly connected to the top of each semicircular supporting plate 14, and an adjusting component for adapting to the portal is arranged at the top of each semicircular supporting plate 14, alarm components for sending danger information are fixedly connected to two sides of the semicircular supporting and protecting plate 14.
In the invention, the lifting assembly comprises a fixed box 20 fixedly connected to the bottom of a first fixed plate 26, the bottom of the fixed box 20 is fixedly connected with a second screw rod 17, the outer wall of the second screw rod 17 is in threaded connection with the inner wall of a rotary drum 7, one side of two sleeves 15 close to each other is fixedly connected with a first fixed block 16, one side of the first fixed block 16 is rotatably connected with a connecting rod 9, one end of the connecting rod 9 is rotatably connected with a second fixed block 25, the top of the second fixed block 25 is fixedly connected with a first sliding block 19, the bottom of the first fixed plate 26 is fixedly connected with a first sliding rail 18 matched with the first sliding block 19, the first sliding rail 18 is slidably connected with the first sliding block 19, the inner wall of one side of the sleeve 15 is fixedly connected with a fourth sliding rail 42, one side of the lifting rod 10 is fixedly connected with a fourth sliding block 43 matched with the fourth sliding rail 42, the fourth, for improving the stability of the first fixing plate 26.
In the invention, the lifting assembly further comprises two push rods 23 fixedly connected to the mutually adjacent sides of the two second fixed blocks 25, the mutually adjacent ends of the two push rods 23 both penetrate through the fixed box 20 and extend into the fixed box 20, the top inner wall and the bottom inner wall of the fixed box 20 are fixedly connected with the same second fixed plate 30, the mutually adjacent ends of the two push rods 23 are fixedly connected with sliding plates 31, the mutually adjacent sides of the two sliding plates 31 are fixedly connected with two symmetrically arranged first tension springs 32, one end of each of the four first tension springs 32 is respectively fixedly connected with two sides of the second fixed plate 30, the top inner wall of the fixed box 20 is fixedly connected with two symmetrically arranged second slide rails 28, the top of each sliding plate 31 is fixedly connected with a second slide block 29 matched with the second slide rails 28, the second slide block 29 is slidably connected with the second slide rails 28, the inner walls at two sides of the fixed box 20 are fixedly connected with two slide bars 27, the sliding rod 27 penetrates through the second fixing plate 30 and the sliding plate 31, and the sliding rod 27 is slidably connected with the sliding plate 31, so that the second fixing block 25 cannot easily rebound, and the stability of the device is improved.
According to the invention, the driving assembly comprises a driving box 5 fixedly connected to the top of the base 1 and a second gear 8 fixedly sleeved on the outer wall of the rotary drum 7, the inner wall of the bottom of the driving box 5 is fixedly connected with a forward and reverse rotating motor 4, an output shaft of the forward and reverse rotating motor 4 is fixedly connected with a rotary shaft 3, the top of the rotary shaft 3 penetrates through the driving box 5 and is fixedly connected with a first gear 2, and the first gear 2 is meshed with the second gear 8, so that the lifting of the device is realized without manpower, and the workload of workers is reduced.
According to the invention, the adjusting assembly comprises a plurality of first screw rods 12 which are in threaded connection with the top of the semicircular supporting and protecting plate 14, the top of each first screw rod 12 is rotatably connected with a lug 13, one side of each lug 13 is fixedly connected with two second tension springs 54 which are symmetrically arranged, one ends of the two second tension springs 54 are fixedly connected with one side of the semicircular supporting and protecting plate 14, and the bottom of each first screw rod 12 penetrates through the semicircular supporting and protecting plate 14 and is fixedly connected with a hand wheel 41.
The setting of adjusting part makes lug 13 inconsistent with the entrance to a cave top, and the adaptation entrance to a cave of being convenient for the effective area of contact of device and entrance to a cave is bigger, and it is better to strut the effect, avoids when the entrance to a cave of unevenness sets up the device, and effective area of contact undersize and can not play the effect of guarantee constructor safety.
According to the invention, the alarm component comprises two third fixing plates 36 fixedly connected to two sides of the semicircular supporting plate 14 and two sound-light alarms 34 fixedly connected to two sides of the semicircular supporting plate 14, the top of the third fixing plate 36 is fixedly connected with a micro switch 35 and a first spring 37, the micro switch 35 is electrically connected with the sound-light alarms 34, two sides of the semicircular supporting plate 14 are both slidably connected with supporting blocks 40, the bottom of each supporting block 40 is fixedly connected with the top of the first spring 37, the top of each supporting block 40 is fixedly connected with a bearing plate 33 which is obliquely arranged, one side of each supporting block 40 is fixedly connected with a third sliding block 39, one side of the semicircular supporting plate 14 is fixedly connected with a third sliding rail 38 which is matched with the third sliding block 39, and the third sliding rail 38 is slidably connected with the third sliding block 39 and is used for reminding constructors of surveying or evacuating in time.
In the invention, the bottom of the lifting rod 10 is provided with a plurality of positioning grooves 53, the inner wall of the bottom of the sleeve 15 is fixedly connected with a plurality of positioning blocks 44, and the positioning blocks 44 are matched with the positioning grooves 53 to prevent the lifting rod 10 from deviating in the lifting process.
According to the invention, the top of the first fixing plate 26 is fixedly connected with the two symmetrically arranged second supporting plates 22, the tops of the two second supporting plates 22 are fixedly connected with the inner wall of the top of the semicircular supporting plate 14, the sides, far away from each other, of the two second supporting plates 22 are fixedly connected with the third supporting plate 24, one end of the third supporting plate 24 is fixedly connected with the inner wall of one side of the semicircular supporting plate 14, the sides, near to each other, of the two second supporting plates 22 are fixedly connected with the same first supporting plate 21, and the first supporting plate 21, the second supporting plate 22 and the third supporting plate 24 are triangular, so that the stability is good, and the supporting effect of the device is improved.
Example two
This embodiment is a further improvement of the previous embodiment: as shown in fig. 1-10, a supporting device for tunnel portal construction comprises a base 1, two symmetrically arranged sleeves 15 are fixedly connected to the top of the base 1, a lifting rod 10 is slidably connected to the inner wall of one side of each sleeve 15, a fixing component for fixing the lifting rod 10 is arranged on one side of each lifting rod 10, the top of each lifting rod 10 is fixedly connected with a semicircular supporting plate 14, the inner wall of each semicircular supporting plate 14 is fixedly connected with a first fixing plate 26, a lifting component for lifting the first fixing plate 26 is arranged at the bottom of the first fixing plate 26, a bearing 6 is fixedly connected to the top of the base 1, a rotating drum 7 is rotatably connected to the inner wall of the bearing 6, a driving component for driving the lifting component is arranged outside the rotating drum 7, a reinforcing plate 11 is fixedly connected to the top of each semicircular supporting plate 14, and an adjusting component for adapting to the portal is arranged at the top of each semicircular supporting plate 14, alarm components for sending danger information are fixedly connected to two sides of the semicircular supporting and protecting plate 14.
According to the invention, the fixing assembly comprises a plurality of clamping grooves 45 arranged on one side of the lifting rod 10 and a plurality of clamping blocks 47 connected to one side of the sleeve 15 in a sliding manner, the clamping blocks 47 are clamped with the clamping grooves 45, one end of each clamping block 47 penetrates through the sleeve 15 and is fixedly connected with the first pull plate 48, the outer wall of each clamping block 47 is fixedly sleeved with the sleeve plate 49, one side of each sleeve plate 49 is fixedly connected with the second spring 46, one end of each second spring 46 is fixedly connected with the same second pull plate 51, one side of the sleeve 15 is fixedly connected with the two symmetrically-arranged limiting rods 52, one side of each limiting rod 52 is abutted against one side of the corresponding second pull plate 51, the clamping blocks 47 penetrate through the corresponding second pull plates 51, the second springs 46 are sleeved on the clamping blocks 47, the inner threads of the corresponding second pull plates 51 are connected with the two symmetrically-arranged bolts 50, and the bolts 50 are in threaded connection with the corresponding limiting rods 52, so as to.
In the invention, the lifting assembly comprises a fixed box 20 fixedly connected to the bottom of a first fixed plate 26, the bottom of the fixed box 20 is fixedly connected with a second screw rod 17, the outer wall of the second screw rod 17 is in threaded connection with the inner wall of a rotary drum 7, one side of two sleeves 15 close to each other is fixedly connected with a first fixed block 16, one side of the first fixed block 16 is rotatably connected with a connecting rod 9, one end of the connecting rod 9 is rotatably connected with a second fixed block 25, the top of the second fixed block 25 is fixedly connected with a first sliding block 19, the bottom of the first fixed plate 26 is fixedly connected with a first sliding rail 18 matched with the first sliding block 19, the first sliding rail 18 is slidably connected with the first sliding block 19, the inner wall of one side of the sleeve 15 is fixedly connected with a fourth sliding rail 42, one side of the lifting rod 10 is fixedly connected with a fourth sliding block 43 matched with the fourth sliding rail 42, the fourth, for improving the stability of the first fixing plate 26.
In the invention, the lifting assembly further comprises two push rods 23 fixedly connected to the mutually adjacent sides of the two second fixed blocks 25, the mutually adjacent ends of the two push rods 23 both penetrate through the fixed box 20 and extend into the fixed box 20, the top inner wall and the bottom inner wall of the fixed box 20 are fixedly connected with the same second fixed plate 30, the mutually adjacent ends of the two push rods 23 are fixedly connected with sliding plates 31, the mutually adjacent sides of the two sliding plates 31 are fixedly connected with two symmetrically arranged first tension springs 32, one end of each of the four first tension springs 32 is respectively fixedly connected with two sides of the second fixed plate 30, the top inner wall of the fixed box 20 is fixedly connected with two symmetrically arranged second slide rails 28, the top of each sliding plate 31 is fixedly connected with a second slide block 29 matched with the second slide rails 28, the second slide block 29 is slidably connected with the second slide rails 28, the inner walls at two sides of the fixed box 20 are fixedly connected with two slide bars 27, the sliding rod 27 penetrates through the second fixing plate 30 and the sliding plate 31, and the sliding rod 27 is slidably connected with the sliding plate 31, so that the second fixing block 25 cannot easily rebound, and the stability of the device is improved.
According to the invention, the driving assembly comprises a driving box 5 fixedly connected to the top of the base 1 and a second gear 8 fixedly sleeved on the outer wall of the rotary drum 7, the inner wall of the bottom of the driving box 5 is fixedly connected with a forward and reverse rotating motor 4, an output shaft of the forward and reverse rotating motor 4 is fixedly connected with a rotary shaft 3, the top of the rotary shaft 3 penetrates through the driving box 5 and is fixedly connected with a first gear 2, and the first gear 2 is meshed with the second gear 8, so that the lifting of the device is realized without manpower, and the workload of workers is reduced.
According to the invention, the adjusting assembly comprises a plurality of first screw rods 12 which are in threaded connection with the top of the semicircular supporting and protecting plate 14, the top of each first screw rod 12 is rotatably connected with a lug 13, one side of each lug 13 is fixedly connected with two second tension springs 54 which are symmetrically arranged, one ends of the two second tension springs 54 are fixedly connected with one side of the semicircular supporting and protecting plate 14, and the bottom of each first screw rod 12 penetrates through the semicircular supporting and protecting plate 14 and is fixedly connected with a hand wheel 41, so that the contact surface between the device and the top of the hole is larger, and the supporting and protecting effect is better.
The setting of adjusting part makes lug 13 inconsistent with the entrance to a cave top, and the adaptation entrance to a cave of being convenient for the effective area of contact of device and entrance to a cave is bigger, and it is better to strut the effect, avoids when the entrance to a cave of unevenness sets up the device, and effective area of contact undersize and can not play the effect of guarantee constructor safety.
According to the invention, the alarm component comprises two third fixing plates 36 fixedly connected to two sides of the semicircular supporting plate 14 and two sound-light alarms 34 fixedly connected to two sides of the semicircular supporting plate 14, the top of the third fixing plate 36 is fixedly connected with a micro switch 35 and a first spring 37, the micro switch 35 is electrically connected with the sound-light alarms 34, two sides of the semicircular supporting plate 14 are both slidably connected with supporting blocks 40, the bottom of each supporting block 40 is fixedly connected with the top of the first spring 37, the top of each supporting block 40 is fixedly connected with a bearing plate 33 which is obliquely arranged, one side of each supporting block 40 is fixedly connected with a third sliding block 39, one side of the semicircular supporting plate 14 is fixedly connected with a third sliding rail 38 which is matched with the third sliding block 39, and the third sliding rail 38 is slidably connected with the third sliding block 39 and is used for reminding constructors of surveying or evacuating in time.
In the invention, the bottom of the lifting rod 10 is provided with a plurality of positioning grooves 53, the inner wall of the bottom of the sleeve 15 is fixedly connected with a plurality of positioning blocks 44, and the positioning blocks 44 are matched with the positioning grooves 53 to prevent the lifting rod 10 from deviating in the lifting process.
According to the invention, the top of the first fixing plate 26 is fixedly connected with the two symmetrically arranged second supporting plates 22, the tops of the two second supporting plates 22 are fixedly connected with the inner wall of the top of the semicircular supporting plate 14, the sides, far away from each other, of the two second supporting plates 22 are fixedly connected with the third supporting plate 24, one end of the third supporting plate 24 is fixedly connected with the inner wall of one side of the semicircular supporting plate 14, the sides, near to each other, of the two second supporting plates 22 are fixedly connected with the same first supporting plate 21, and the first supporting plate 21, the second supporting plate 22 and the third supporting plate 24 are triangular, so that the stability is good, and the supporting effect of the device is improved.
The advantages of the second embodiment over the first embodiment are:
according to the second embodiment of the invention, the plurality of clamping grooves 45 of the fixing component are formed in one side of the lifting rod 10, the plurality of clamping blocks 47 are slidably connected to one side of the sleeve 15, the clamping blocks 47 are clamped with the clamping grooves 45, through the arrangement of the fixing component, after the semicircular supporting plate 14 moves to be in contact with the hole, the clamping blocks 47 are re-meshed with the clamping grooves 45, and through the meshing of the plurality of clamping blocks 47 and the plurality of clamping grooves 45, the semicircular supporting plate 14 can move downwards when the top of the device is subjected to large pressure, so that the supporting effect is poor and dangerous, and when a dangerous condition occurs, the arrangement of the plurality of clamping blocks 47 ensures that the device cannot easily fall down, so that the safety is improved.
A construction method of a supporting device for tunnel portal construction comprises the following steps:
s1, moving the device to a tunnel entrance, starting a forward and reverse rotation motor 4 to enable the forward and reverse rotation motor 4 to rotate forward, enabling an output shaft of the forward and reverse rotation motor 4 to drive a rotating shaft 3 to rotate, enabling the rotating shaft 3 to drive a first gear 2 to rotate, enabling the first gear 2 to drive a second gear 8 to rotate, enabling the second gear 8 to drive a rotating drum 7 to rotate, enabling the rotating drum 7 to drive a second screw 17 to move vertically upwards, enabling the second screw 17 to drive a fixed box 20 to move vertically upwards, enabling the fixed box 20 to drive a first fixed plate 26 to move vertically upwards, and enabling the first fixed plate 26 to drive a semicircular supporting plate 14 to move vertically upwards;
s2, the semicircular supporting and protecting plate 14 drives the lifting rod 10 to vertically move upwards, the lifting rod 10 pushes the fixture block 47 to transversely move, the fixture block 47 drives the sleeve plate 49 to transversely move, the sleeve plate 49 extrudes the second spring 46, at the moment, the fixture block 47 is released from the clamping state with the clamping groove 45, until the hand wheel 41 is completely attached to the hole, the fixture block 47 is re-meshed with the clamping groove 45, the first fixing plate 26 drives the two connecting rods 9 to rotate and to be away from each other, the connecting rods 9 drive the two push rods 23 to be away from each other, the push rods 23 drive the sliding plate 31 to transversely move, and the sliding plate 31 stretches;
s3, rotating the hand wheel 41, wherein the hand wheel 41 drives the first screw 12 to move in a direction away from the semicircular supporting guard plate 14, and the first screw 12 drives the projection 13 to move in a direction away from the semicircular supporting guard plate 14, so that the projection 13 is abutted against the top of the hole, and the hole can be conveniently adapted to holes with different specifications;
s4, when danger is likely to occur when stones fall at the opening, the stones fall on the bearing plate 33, the bearing plate 33 drives the supporting block 40 to vertically move downwards, the supporting block 40 extrudes the first spring 37 and abuts against the micro switch 35, and the acousto-optic alarm 34 starts to give an alarm to remind constructors of surveying or evacuation in time, so that the safety coefficient is high;
s5, when disassembly is needed, the bolt 50 is screwed out, the second pulling plate 51 is pulled transversely by hand, the second pulling plate 51 drives the first pulling plate 48 to move transversely, the first pulling plate 48 drives the fixture block 47 to move transversely, the clamping state of the fixture block 47 and the clamping groove 45 is further released, the forward and reverse motor 4 is started again to rotate the forward and reverse motor 4 reversely, the output shaft of the forward and reverse motor 4 drives the rotating shaft 3 to rotate, the rotating shaft 3 drives the first gear 2 to rotate, the first gear 2 drives the second gear 8 to rotate, the second gear 8 drives the rotary drum 7 to rotate, the rotary drum 7 drives the second screw 17 to move vertically and downwards, the second screw 17 drives the fixed box 20 to move vertically and downwards, the fixed box 20 drives the first fixed plate 26 to move vertically and downwards, the first fixed plate 26 drives the semicircular support plate 14 to move vertically and downwards, the semicircular support plate 14 drives the lifting rod 10 to move vertically and downwards, at the moment, the forward and reverse motor 4, the bolt 50 is screwed, so that the clamping block 47 is clamped with the clamping groove 45 again, and the next use is facilitated.
This supporting device is used in tunnel entrance to a cave construction, with the device removal to the tunnel entrance to a cave, start positive reverse motor 4 and make positive reverse motor 4 corotation, positive reverse motor 4's output shaft drives pivot 3 and rotates, pivot 3 drives first gear 2 and rotates, first gear 2 drives second gear 8 and rotates, second gear 8 drives rotary drum 7 and rotates, rotary drum 7 drives the vertical rebound of second screw rod 17, second screw rod 17 drives the vertical rebound of fixed case 20, fixed case 20 drives the vertical rebound of first fixed plate 26, first fixed plate 26 drives the vertical rebound of semi-circular backplate 14.
The semicircular supporting plate 14 drives the lifting rod 10 to vertically move upwards, the lifting rod 10 pushes the fixture block 47 to transversely move, the fixture block 47 drives the sleeve plate 49 to transversely move, the sleeve plate 49 extrudes the second spring 46, at the moment, the fixture block 47 is released from the clamping state with the clamping groove 45, until the hand wheel 41 is completely attached to the opening, the fixture block 47 is re-meshed with the clamping groove 45, the first fixing plate 26 drives the two connecting rods 9 to rotate and move away from each other, the connecting rods 9 drive the two push rods 23 to move away from each other, the push rods 23 drive the sliding plate 31 to transversely move, the sliding plate 31 stretches the first tension spring 32, the hand wheel 41 is rotated, the hand wheel 41 drives the first screw 12 to move in the direction away from the semicircular supporting plate 14, the first screw 12 drives the lug 13 to move in the direction away from the semicircular supporting plate 14, further, the lug 13 is abutted against the top of the, the stone drops on bearing plate 33, and bearing plate 33 drives the vertical downstream of supporting shoe 40, and supporting shoe 40 extrudees first spring 37 and inconsistent with micro-gap switch 35, and reputation siren 34 begins the alarm this moment for remind constructor in time to carry out reconnaissance or withdraw, factor of safety is high.
When the disassembly is needed, the bolt 50 is screwed out, the second pulling plate 51 is pulled transversely by hand, the second pulling plate 51 drives the first pulling plate 48 to move transversely, the first pulling plate 48 drives the fixture block 47 to move transversely, so that the clamping state of the fixture block 47 and the clamping groove 45 is released, the forward and reverse motor 4 is started again to rotate the forward and reverse motor 4 reversely, the output shaft of the forward and reverse motor 4 drives the rotating shaft 3 to rotate, the rotating shaft 3 drives the first gear 2 to rotate, the first gear 2 drives the second gear 8 to rotate, the second gear 8 drives the rotating drum 7 to rotate, the rotating drum 7 drives the second screw 17 to move vertically downwards, the second screw 17 drives the fixed box 20 to move vertically downwards, the fixed box 20 drives the first fixed plate 26 to move vertically downwards, the first fixed plate 26 drives the semicircular supporting plate 14 to move vertically downwards, the semicircular supporting plate 14 drives the lifting rod 10 to move vertically downwards, and at this time, the forward and reverse motor 4 is closed, the bolt 50 is screwed, so that the clamping block 47 is clamped with the clamping groove 45 again, and the next use is facilitated.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. The supporting device for tunnel portal construction comprises a base (1) and is characterized in that the top of the base (1) is fixedly connected with two symmetrically arranged sleeves (15), the inner wall of one side of each sleeve (15) is slidably connected with a lifting rod (10), one side of each lifting rod (10) is provided with a fixing component for fixing the lifting rod (10), the tops of the two lifting rods (10) are fixedly connected with the same semicircular supporting plate (14), the inner wall of each semicircular supporting plate (14) is fixedly connected with a first fixing plate (26), the bottom of each first fixing plate (26) is provided with a lifting component for lifting the first fixing plate (26), the top of the base (1) is fixedly connected with a bearing (6), the inner wall of each bearing (6) is rotatably connected with a rotary drum (7), and the outside of each rotary drum (7) is provided with a driving component for driving the lifting component, the top of the semicircular supporting and protecting plate (14) is fixedly connected with a reinforcing plate (11), the top of the semicircular supporting and protecting plate (14) is provided with an adjusting component used for adapting to the hole, and two sides of the semicircular supporting and protecting plate (14) are fixedly connected with alarm components used for sending out danger information.
2. The supporting device for tunnel portal construction according to claim 1, wherein the fixing component comprises a plurality of clamping grooves (45) formed in one side of the lifting rod (10) and a plurality of clamping blocks (47) connected to one side of the sleeve (15) in a sliding manner, the clamping blocks (47) are clamped with the clamping grooves (45), one end of each clamping block (47) penetrates through the sleeve (15) and is fixedly connected with a first pulling plate (48), a sleeve plate (49) is fixedly sleeved on the outer wall of each clamping block (47), a second spring (46) is fixedly connected to one side of each sleeve plate (49), one end of each second spring (46) is fixedly connected with a same second pulling plate (51), two limiting rods (52) symmetrically arranged are fixedly connected to one side of the sleeve (15), one side of each limiting rod (52) is abutted against one side of the second pulling plate (51), a plurality of fixture blocks (47) all run through second arm-tie (51), second spring (46) cover is established on fixture block (47), the internal thread of second arm-tie (51) is connected with two bolts (50) that the symmetry set up, bolt (50) and gag lever post (52) threaded connection.
3. The supporting device for tunnel portal construction according to claim 1, wherein the lifting assembly comprises a fixed box (20) fixedly connected to the bottom of a first fixed plate (26), the bottom of the fixed box (20) is fixedly connected with a second screw (17), the outer wall of the second screw (17) is in threaded connection with the inner wall of the drum (7), one side of the two sleeves (15) close to each other is fixedly connected with a first fixed block (16), one side of the first fixed block (16) is rotatably connected with a connecting rod (9), one end of the connecting rod (9) is rotatably connected with a second fixed block (25), the top of the second fixed block (25) is fixedly connected with a first sliding block (19), the bottom of the first fixed plate (26) is fixedly connected with a first sliding rail (18) matched with the first sliding block (19), first slide rail (18) and first slider (19) sliding connection, one side inner wall fixedly connected with fourth slide rail (42) of sleeve (15), one side fixedly connected with of lifter (10) and fourth slider (43) of fourth slide rail (42) looks adaptation, fourth slide rail (42) and fourth slider (43) sliding connection.
4. The supporting device for tunnel portal construction according to claim 3, wherein the lifting assembly further comprises two push rods (23) fixedly connected to the side where the two second fixed blocks (25) are close to each other, the ends where the two push rods (23) are close to each other both penetrate through the fixed box (20) and extend to the inside of the fixed box (20), the same second fixed plate (30) is fixedly connected to the top inner wall and the bottom inner wall of the fixed box (20), a sliding plate (31) is fixedly connected to the ends where the two push rods (23) are close to each other, two first tension springs (32) symmetrically arranged are fixedly connected to the side where the two sliding plates (31) are close to each other, one end of each of the four first tension springs (32) is fixedly connected to both sides of the second fixed plate (30), and two second slide rails (28) symmetrically arranged are fixedly connected to the top inner wall of the fixed box (20), the top of the sliding plate (31) is fixedly connected with a second sliding block (29) matched with a second sliding rail (28), the second sliding block (29) is connected with the second sliding rail (28) in a sliding mode, two sliding rods (27) are fixedly connected to the inner walls of the two sides of the fixed box (20), the sliding rods (27) penetrate through a second fixed plate (30) and the sliding plate (31), and the sliding rods (27) are connected with the sliding plate (31) in a sliding mode.
5. The supporting device for tunnel portal construction according to claim 1, wherein the driving assembly comprises a driving box (5) fixedly connected to the top of the base (1) and a second gear (8) fixedly sleeved on the outer wall of the rotary drum (7), a forward and reverse rotating motor (4) is fixedly connected to the inner wall of the bottom of the driving box (5), a rotating shaft (3) is fixedly connected to the output shaft of the forward and reverse rotating motor (4), the top of the rotating shaft (3) penetrates through the driving box (5) and is fixedly connected with a first gear (2), and the first gear (2) is meshed with the second gear (8).
6. The supporting device for tunnel portal construction according to claim 1, wherein the adjusting assembly comprises a plurality of first screw rods (12) which are in threaded connection with the tops of the semicircular supporting plates (14), the tops of the first screw rods (12) are rotatably connected with the convex blocks (13), two second tension springs (54) which are symmetrically arranged are fixedly connected to one side of each convex block (13), one ends of the two second tension springs (54) are fixedly connected with one side of each semicircular supporting plate (14), and the bottoms of the first screw rods (12) penetrate through the semicircular supporting plates (14) and are fixedly connected with hand wheels (41).
7. The supporting device for tunnel entrance construction according to claim 1, wherein the alarm assembly comprises two third fixing plates (36) fixedly connected to both sides of the semicircular supporting plate (14) and two sound and light alarms (34) fixedly connected to both sides of the semicircular supporting plate (14), a micro switch (35) and a first spring (37) are fixedly connected to the top of the third fixing plate (36), the micro switch (35) is electrically connected to the sound and light alarms (34), supporting blocks (40) are slidably connected to both sides of the semicircular supporting plate (14), the bottom of the supporting block (40) is fixedly connected to the top of the first spring (37), a bearing plate (33) is fixedly connected to the top of the supporting block (40), and a third sliding block (39) is fixedly connected to one side of the supporting block (40), one side of the semicircular supporting plate (14) is fixedly connected with a third sliding rail (38) matched with a third sliding block (39), and the third sliding rail (38) is connected with the third sliding block (39) in a sliding manner.
8. The supporting device for tunnel portal construction according to claim 1, wherein the bottom of the lifting rod (10) is provided with a plurality of positioning grooves (53), the inner wall of the bottom of the sleeve (15) is fixedly connected with a plurality of positioning blocks (44), and the positioning blocks (44) are matched with the positioning grooves (53).
9. The supporting device for tunnel portal construction according to claim 1, wherein the top of the first fixing plate (26) is fixedly connected with two second supporting plates (22) which are symmetrically arranged, the tops of the two second supporting plates (22) are fixedly connected with the inner wall of the top of the semicircular supporting plate (14), the sides of the two second supporting plates (22) which are far away from each other are fixedly connected with third supporting plates (24), one end of each third supporting plate (24) is fixedly connected with the inner wall of one side of the semicircular supporting plate (14), and the side of the two second supporting plates (22) which are close to each other is fixedly connected with the same first supporting plate (21).
10. A construction method of a supporting device for tunnel portal construction is characterized by comprising the following steps:
s1, moving the device to a tunnel entrance, starting a forward and reverse rotation motor (4) to enable the forward and reverse rotation motor (4) to rotate forward, driving a rotating shaft (3) to rotate by an output shaft of the forward and reverse rotation motor (4), driving a first gear (2) to rotate by the rotating shaft (3), driving a second gear (8) to rotate by the first gear (2), driving a rotating drum (7) to rotate by the second gear (8), driving a second screw (17) to vertically move upwards by the rotating drum (7), driving a fixed box (20) to vertically move upwards by the second screw (17), driving a first fixed plate (26) to vertically move upwards by the fixed box (20), and driving a semicircular supporting plate (14) to vertically move upwards by the first fixed plate (26);
s2, the semicircular supporting plate (14) drives the lifting rod (10) to vertically move upwards, the lifting rod (10) pushes the fixture block (47) to transversely move, the fixture block (47) drives the sleeve plate (49) to transversely move, the sleeve plate (49) extrudes the second spring (46), the fixture block (47) is released from a clamping state with the clamping groove (45) at the moment, the fixture block (47) is re-meshed with the clamping groove (45) until the hand wheel (41) is completely attached to the opening, the first fixing plate (26) drives the two connecting rods (9) to rotate and move away from each other, the connecting rods (9) drive the two push rods (23) to move away from each other, the push rods (23) drive the sliding plate (31) to transversely move, and the sliding plate (31) stretches the first tension spring (32;
s3, rotating the hand wheel (41), wherein the hand wheel (41) drives the first screw rod (12) to move towards the direction far away from the semicircular supporting guard plate (14), and the first screw rod (12) drives the bump (13) to move towards the direction far away from the semicircular supporting guard plate (14), so that the bump (13) is abutted against the top of the hole, and the hole is convenient to adapt;
s4, when the falling stones at the opening are dangerous, the stones fall on the bearing plate (33), the bearing plate (33) drives the supporting block (40) to vertically move downwards, the supporting block (40) extrudes the first spring (37) and is abutted to the microswitch (35), and the acousto-optic alarm (34) starts to give an alarm to remind constructors of reconnaissance or evacuation in time, so that the safety coefficient is high;
s5, when disassembly is needed, the bolt (50) is screwed out, the second pulling plate (51) is pulled transversely by hand, the second pulling plate (51) drives the first pulling plate (48) to move transversely, the first pulling plate (48) drives the clamping block (47) to move transversely, the clamping state of the clamping block (47) and the clamping groove (45) is further released, the forward and reverse motor (4) is started again to enable the forward and reverse motor (4) to rotate reversely, the output shaft of the forward and reverse motor (4) drives the rotating shaft (3) to rotate, the rotating shaft (3) drives the first gear (2) to rotate, the first gear (2) drives the second gear (8) to rotate, the second gear (8) drives the rotating drum (7) to rotate, the rotating drum (7) drives the second screw (17) to move vertically downwards, the second screw (17) drives the fixed box (20) to move vertically downwards, the fixed box (20) drives the first fixed plate (26) to move vertically downwards, first fixed plate (26) drive semi-circular fender board (14) vertical downstream, and semi-circular fender board (14) drive lifter (10) vertical downstream, close positive and negative motor (4) this moment, screw bolt (50) for fixture block (47) and draw-in groove (45) block once more, are convenient for use next time.
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| CN114961809A (en) * | 2022-06-21 | 2022-08-30 | 中国十九冶集团有限公司 | Support arrangement based on tunnel entrance to a cave construction usefulness |
| CN115234020A (en) * | 2022-07-11 | 2022-10-25 | 中建八局第二建设有限公司 | Flexible telescopic hole safety protection device and use method |
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| CN212614796U (en) * | 2020-07-10 | 2021-02-26 | 山西中科赛德能源科技有限公司 | Two group of wall caving prevention supporting device in tunnel |
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| CN114294036A (en) * | 2021-12-20 | 2022-04-08 | 曹文强 | Adjustable supporting equipment for culvert for urban and rural planning |
| CN114961809A (en) * | 2022-06-21 | 2022-08-30 | 中国十九冶集团有限公司 | Support arrangement based on tunnel entrance to a cave construction usefulness |
| CN114961809B (en) * | 2022-06-21 | 2023-03-03 | 中国十九冶集团有限公司 | Supporting device for tunnel portal construction |
| CN115234020A (en) * | 2022-07-11 | 2022-10-25 | 中建八局第二建设有限公司 | Flexible telescopic hole safety protection device and use method |
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