Portal frame for engineering construction

Abstract

The invention relates to the technical field of ocean engineering, in particular to an engineering construction portal frame which comprises two supports, a lifting seat is arranged between the two supports, a sliding plate is arranged above the lifting seat, the two ends of the sliding plate penetrate through the two supports respectively, two guide plates penetrate through the sliding plate, and the bottom ends of the guide plates are fixedly connected with the lifting seat. The top ends of the two supports are connected through a lifting mechanism, the lifting mechanism is used for driving the lifting base to ascend and descend in the vertical direction relative to the sliding plate, sliding rail supporting units are installed at the bottom ends of the supports, a plurality of lifting plates are arranged below the lifting base, the lifting base is provided with position adjusting assemblies matched with the lifting plates, and inserting rods are fixedly connected to the bottoms of the lifting plates. A plurality of containing grooves are formed in the inserting rod, supporting plates are arranged in the containing grooves, and the inserting rod is provided with a rotary adjusting structure matched with the multiple supporting plates; and the cable well lid can be conveniently hoisted according to actual requirements, and accurate resetting of the cable well lid is completed.

Description

Technical Field

[0001] The invention relates to the technical field of marine engineering, and in particular to a gantry for engineering construction. Background Art

[0002] Marine engineering refers to new construction, reconstruction, and expansion projects that are built for the purpose of developing, utilizing, protecting, and restoring marine resources, and the main body of the project is located on the seaward side of the coastline. During the construction of marine engineering, lifting devices are often required to transport or lift parts. Through searching the prior art, it was found that the Chinese patent with announcement number CN215439312U discloses a lifting device for installing marine engineering structures, which drives a pair of sliders to drive a pair of clamps to move inward through a motor-driven gear assembly, thereby achieving stable clamping of parts of different sizes.

[0003] However, it is worth considering that in marine engineering construction, cables need to be laid, and some on-site cable manhole covers are heavy, and the clamps are not convenient for lifting the cable manhole covers, resulting in a small scope of application and certain limitations.

[0004] Therefore, in order to solve the above problems, a related facility that better meets the usage requirements is needed. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a gantry for engineering construction to solve the problem that the above-mentioned clamping claws are inconvenient for lifting the cable manhole cover.

[0006] Based on the above-mentioned purpose, the present invention provides a gantry for engineering construction, comprising two brackets, a lifting seat is provided between the two brackets, a slide plate is provided above the lifting seat, two ends of the slide plate respectively pass through the two brackets, two guide plates are passed through the slide plate, and the bottom end of the guide plate is fixedly connected to the lifting seat, the top ends of the two brackets are connected by a lifting mechanism, the lifting mechanism is used to drive the lifting seat to rise and fall in the vertical direction relative to the slide plate, a slide rail support unit is installed at the bottom end of the bracket, a plurality of lifting plates are provided below the lifting seat, a position adjustment component matched with the lifting plate is installed on the lifting seat, an insertion rod is fixedly connected to the bottom of the lifting plate, a plurality of accommodating grooves are provided on the insertion rod, a support plate is provided in the accommodating groove, and a rotation adjustment structure matched with the plurality of support plates is installed on the insertion rod.

[0007] Optionally, the rotation adjustment structure includes a support block fixedly mounted on the top of the pallet, the bottom end of the pallet is rotatably connected to the receiving groove, a pushing unit adapted to the support block is installed in the receiving groove, a prism passes through the insertion rod, the bottom end of the prism is fixedly connected to a movable frame located below the insertion rod, a plurality of stop columns are fixedly connected to the top of the movable frame, the number of stop columns and the number of pallets are the same, the stop columns are in contact with the corresponding pallets, and the lifting plate is installed with a vertical sliding unit adapted to the prism.

[0008] Optionally, the vertical sliding unit includes a movable plate fixedly mounted on the top of the prism, a control chamber is opened in the lifting plate, and the movable plate is located in the control chamber, the bottom of the movable plate is fixedly connected to a support column, and the bottom end of the support column passes through the lifting plate, and a magnetic suction part compatible with the movable plate is installed in the control chamber.

[0009] Optionally, the magnetic attraction member includes an electromagnet fixedly mounted in the control chamber, and the movable plate is fixedly mounted with a first iron plate in contact with the electromagnet.

[0010] Optionally, the pushing unit includes a push plate arranged on the side of the support block facing the prism, the push plate and the support block are in contact, two fixed columns penetrate the push plate, and the two fixed columns are respectively located on both sides of the support block, a compression spring is provided on the outer sleeve of the fixed column, and the two ends of the compression spring are respectively fixedly connected to the push plate and the inner wall of the accommodating groove, an anti-slip block is fixedly installed on the fixed column, and the anti-slip block is located on the side of the push plate away from the compression spring.

[0011] Optionally, the position adjustment assembly includes a rotating seat fixedly mounted on the lifting plate toward one end of the lifting seat, the rotating seat having a rotating shaft passing through it, the rotating shaft having a guide bar fixedly connected thereto, and the guide bar passing through the rotating seat, an annular groove is provided on the lifting seat, a movable seat is rotatably connected to one end of the rotating shaft toward the lifting seat, the movable seat is fixedly mounted with a guide block located in the annular groove, a pressing ring is provided above the lifting seat, the top of the rotating seat is in contact with the bottom of the pressing ring, a mounting frame is fixedly mounted on the guide plate, a hydraulic telescopic rod is fixedly mounted on the mounting frame, and the telescopic end of the hydraulic telescopic rod is fixedly connected to the pressing ring.

[0012] Optionally, the lifting mechanism includes a support tube arranged above the lifting seat, a movable tube is slidably provided in the support tube, the movable tube and the support tube are respectively fixedly connected to two brackets, a plurality of threaded holes are opened on the movable tube, at least two bolts pass through the support tube, and the bolts pass through corresponding threaded holes, an electric hoist is fixedly installed on the support tube, a lifting rope is fixedly connected to the winding drum of the electric hoist, and the lifting rope passes through the slide plate, and the bottom end of the lifting rope is fixedly connected to the lifting seat.

[0013] Optionally, two guide wheels are rotatably connected to the top of the skateboard, and the suspension rope is located between the two guide wheels.

[0014] Optionally, the slide rail support unit includes a guide rail arranged below the bracket, a sliding seat is slidably provided on the guide rail, a roller compatible with the guide rail is rotatably connected to the sliding seat, the sliding seat is fixedly connected to the bracket, and a positioning piece compatible with the guide rail is installed on the sliding seat.

[0015] Optionally, the positioning member includes an insertion plate symmetrically arranged on both sides of the sliding seat, an external sliding sleeve of the insertion plate is provided with a fixed sleeve, and the fixed sleeve and the sliding seat are fixedly connected, a plurality of insertion holes compatible with the insertion plate are opened on the guide rail, the bottom end of the insertion plate is located in the corresponding insertion holes, the top end of the insertion plate is fixedly connected to the second iron plate, and magnet blocks are respectively fixedly connected to both sides of the sliding seat, and the magnet blocks are located above the second iron plate.

[0016] The beneficial effects of the present invention are as follows: the bracket slides to a preset position through the slide rail support unit, the staff drives the slide plate to slide relative to the bracket, so that the lifting seat moves to the top of the cable manhole cover, the lifting plate is driven to move relative to the lifting seat through the position adjustment component, so that the insertion rod moves to the top of the through hole on the manhole cover, the lifting seat, the lifting plate and the insertion rod are driven downward by the lifting mechanism, so that the insertion rod passes through the through hole on the manhole cover, the guide plate slides relative to the slide plate, and the guide plate is designed to make the lifting seat move smoothly in the vertical direction, and when the support plate moves to the bottom of the manhole cover, the rotary adjustment structure drives the lifting seat, the lifting plate and the insertion rod to move downward, so that the insertion rod passes through the through hole on the manhole cover, and the guide plate slides relative to the slide plate. The guide plate is designed to make the lifting seat move smoothly in the vertical direction. When the support plate moves to the bottom of the manhole cover, the rotary adjustment structure drives the lifting seat, the lifting plate and the insertion rod to move downward, so that the insertion rod passes through the through hole on the manhole cover. The top of the movable pallet is rotated out of the accommodating groove, and the pallet is placed horizontally. The lifting seat, lifting plate and insertion rod are driven upward by the lifting mechanism, so that the pallet drags the bottom of the manhole cover upward to complete the lifting of the manhole cover. The bracket and the cable manhole cover slide through the slide rail support unit so that the manhole cover is no longer located above the working well. When the work in the on-site working well is completed, similarly, the above steps are reversed to reset the manhole cover to its initial position. The staff then transfers the gantry to the next working well to be operated, so that the cable manhole cover can be lifted according to actual needs and the cable manhole cover can be accurately reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure of the middle A area; Figure 3 It is a structural schematic diagram of a sliding seat according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a skateboard according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a lifting seat according to an embodiment of the present invention; Figure 6 This is a schematic structural diagram of a cross-section of a lifting plate according to an embodiment of the present invention; Figure 7This is a schematic structural diagram of a cross-section of a rod insertion rod according to an embodiment of the present invention; Figure 8 It is a schematic structural diagram of a support plate according to an embodiment of the present invention.

[0019] The markings in the figure are: 1. Bracket; 2. Lifting seat; 3. Slide plate; 4. Guide plate; 5. Lifting plate; 6. Insertion rod; 7. Accommodating groove; 8. Support plate; 9. Support block; 10. Push plate; 11. Prism; 12. Movable frame; 13. Stop column; 14. Control chamber; 15. Movable plate; 16. Support column; 17. Electromagnet; 18. First iron plate; 19. Fixed column; 20. Compression spring; 21. Anti-slip block; 22. Rotating seat; 23. Rotating shaft; 24 , guide strip; 25, movable seat; 26, annular groove; 27, guide block; 28, pressing ring; 29, mounting frame; 30, hydraulic telescopic rod; 31, support pipe; 32, movable pipe; 33, electric hoist; 34, lifting rope; 35, guide wheel; 36, threaded hole; 37, bolt; 38, guide rail; 39, sliding seat; 40, roller; 41, socket; 42, fixing sleeve; 43, plug plate; 44, second iron plate; 45, magnet block. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0021] This embodiment proposes a gantry for engineering construction, such as Figure 1 , Figure 4 , Figure 6 and Figure 7As shown, it comprises two brackets 1, a lifting seat 2 is arranged between the two brackets 1, a slide plate 3 is arranged above the lifting seat 2, two ends of the slide plate 3 respectively penetrate the two brackets 1, two guide plates 4 are penetrated on the slide plate 3, and the bottom end of the guide plate 4 is fixedly connected to the lifting seat 2, the top ends of the two brackets 1 are connected by a lifting mechanism, and the lifting mechanism is used to drive the lifting seat 2 to lift in the vertical direction relative to the slide plate 3, a slide rail support unit is installed at the bottom end of the bracket 1, a plurality of lifting plates 5 are arranged below the lifting seat 2, and the lifting seat 2 is installed with a position adjustment component adapted to the lifting plate 5, a plug rod 6 is fixedly connected to the bottom of the lifting plate 5, a plurality of receiving grooves 7 are opened on the plug rod 6, a support plate 8 is arranged in the receiving groove 7, and a rotation adjustment structure adapted to the plurality of support plates 8 is installed on the plug rod 6; the bracket 1 slides to a preset position through the slide rail support unit, and the staff drives the slide plate 3 to slide relative to the bracket 1, so that the lifting seat 2 moves to the top of the cable well cover, and drives the lifting plates 5 to move relative to the cable well cover through the position adjustment component When the lifting platform 8 is under the lifting position, the top of the support plate 8 is driven by the lifting mechanism to rotate out of the receiving groove 7, and the support plate 8 is placed horizontally. The lifting platform 2, the lifting platform 5 and the plugging rod 6 are driven upward by the lifting mechanism to make the support plate 8 drag the bottom of the well cover to complete the lifting of the well cover. The bracket 1 and the cable well cover slide through the slide rail support unit so that the well cover is no longer located above the well. When the work in the well is completed, the well cover can be reset to its initial position by reversing the above steps. The staff will then transfer the gantry to the next well to be operated, so as to lift the cable well cover according to actual needs and complete the accurate reset of the cable well cover.

[0022] In some optional specific embodiments, such as Figure 6 , Figure 7 and Figure 8As shown, the rotation adjustment structure includes a support block 9 fixedly mounted on the top of the support plate 8, the bottom end of the support plate 8 is rotatably connected to the receiving groove 7, a pushing unit adapted to the support block 9 is installed in the receiving groove 7, a prism 11 passes through the insertion rod 6, the bottom end of the prism 11 is fixedly connected to a movable frame 12 located below the insertion rod 6, a plurality of stop columns 13 are fixedly connected to the top of the movable frame 12, the number of stop columns 13 and the support plate 8 are the same, and the stop columns 13 are in contact with the corresponding support plate 8, the lifting plate 5 is installed with a vertical sliding unit adapted to the prism 11, the vertical sliding unit includes a movable plate 15 fixedly mounted on the top of the prism 11, a control chamber 14 is opened in the lifting plate 5, and the movable plate 15 is located in the control chamber 14, and the bottom of the movable plate 15 is fixedly connected to the support column 1 6, and the bottom end of the support column 16 passes through the lifting plate 5, a magnetic attraction member adapted to the movable plate 15 is installed in the control chamber 14, the magnetic attraction member includes an electromagnet 17 fixedly installed in the control chamber 14, and the movable plate 15 is fixedly installed with a first iron plate 18 in contact with the electromagnet 17, and the pushing unit includes a push plate 10 arranged on the side of the support block 9 facing the prism 11, the push plate 10 is in contact with the support block 9, and two fixed columns 19 are penetrated on the push plate 10, and the two fixed columns 19 are respectively located on both sides of the support block 9, and the outer sleeve of the fixed column 19 is provided with a compression spring 20, and the two ends of the compression spring 20 are respectively fixedly connected to the push plate 10 and the inner wall of the accommodating groove 7, and the fixed column 19 is fixedly installed with an anti-slip block 21, and the anti-slip block 21 is located on the side of the push plate 10 away from the compression spring 20; When the insertion rod 6 passes through the through hole on the manhole cover, the electromagnet 17 is powered off, and the electromagnet 17 and the first iron plate 18 are no longer magnetically attracted together. The movable plate 15, the prism 11 and the support column 16 move downward due to their own gravity. The bottom end of the support column 16 extends to the bottom of the lifting plate 5. The prism 11 drives the stop column 13 to move downward through the movable frame 12, so that the stop column 13 is no longer in contact with the support plate 8, and the limit on the position of the support plate 8 is released. At this time, the compression spring 20 is in a compressed state, and the compression spring 20 pushes the push plate 10 moves, so that the push plate 10 pushes the support block 9 to move out of the receiving groove 7, so that the top of the support plate 8 can be rotated out of the receiving groove 7, and finally the support plate 8 is placed horizontally, the bottom of the support plate 8 and the bottom inner wall of the receiving groove 7 are abutted, and at this time the push plate 10 is in contact with the anti-slip block 21. The design of the anti-slip block 21 prevents the push plate 10 from being separated from the fixed column 19. When the lifting plate 5 and the plug rod 6 move up, the support plate 8 can contact the bottom of the cable well cover, and finally the support plate 8 lifts the cable well cover out of the working well When the cable well cover is reset to the initial position, the lifting seat 2 is driven to move downward continuously through the lifting mechanism, so that the lifting plate 5 and the plug rod 6 move downward. At this time, the bottom end of the support column 16 contacts the ground, and the support column 16, the first iron plate 18, the prism 11, the movable frame 12 and the stop column 13 stop moving downward. As the lifting plate 5, the plug rod 6 and the support plate 8 continue to move downward, the top end of the stop column 13 pushes the support plate 8 to rotate in the opposite direction, and finally the top end of the support plate 8 is rotated into the receiving groove 7, and the support block 9 is again in contact with the push plate 1 0 is in contact with each other, the compression spring 20 is in a compressed state, and the stop column 13 is in contact with the side of the support plate 8 away from the prism 11, so as to prevent the support plate 8 from sliding out of the accommodating groove 7. At this time, the first iron plate 18 moves up to one side of the electromagnet 17, the electromagnet 17 is energized, and the electromagnet 17 and the first iron plate 18 are magnetically attracted together, so that the stop column 13 and the movable frame 12 can be kept fixed relative to the insertion rod 6, and the lifting seat 2 is driven up by the lifting mechanism to make the insertion rod 6 slide out of the through hole on the cable well cover.

[0023] In some optional specific embodiments, such as Figure 4 and Figure 5 As shown, the position adjustment assembly includes a rotating seat 22 fixedly mounted on the lifting plate 5 toward one end of the lifting seat 2, a rotating shaft 23 passes through the rotating seat 22, a guide bar 24 is fixedly connected to the rotating shaft 23, and the guide bar 24 passes through the rotating seat 22, an annular groove 26 is provided on the lifting seat 2, a movable seat 25 is rotatably connected to one end of the rotating shaft 23 toward the lifting seat 2, a guide block 27 located in the annular groove 26 is fixedly mounted on the movable seat 25, a pressing ring 28 is provided above the lifting seat 2, the top of the rotating seat 22 is in contact with the bottom of the pressing ring 28, a mounting frame 29 is fixedly mounted on the guide plate 4, a hydraulic telescopic rod 30 is fixedly mounted on the mounting frame 29, and the telescopic end of the hydraulic telescopic rod 30 is fixedly connected to the pressing ring 28; The staff drives the guide block 27 to slide in the annular groove 26 through the movable seat 25, and the staff drives the lifting plate 5 and the rotating seat 22 to slide relative to the rotating shaft 23 and the guide strip 24, so as to adjust the initial position of the insertion rod 6 relative to the lifting seat 2. According to the number of through holes on the manhole cover, the staff drives the lifting plate 5, the rotating seat 22, the guide strip 24 and the rotating shaft 23 to rotate relative to the movable seat 25, so that the unused insertion rod 6 can be rotated to the top of the lifting plate 5. When the position of the insertion rod 6 is adjusted, the pressing ring 28 is driven downward by the hydraulic telescopic rod 30, and the pressing ring 28 presses the rotating seat 22 to fix the rotating seat 22 relative to the lifting seat 2, so as to complete the adjustment of the position of the insertion rod 6.

[0024] In some optional specific embodiments, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the lifting mechanism includes a support tube 31 arranged above the lifting seat 2, a movable tube 32 is slidably arranged in the support tube 31, the movable tube 32 and the support tube 31 are respectively fixedly connected to the two brackets 1, a plurality of threaded holes 36 are opened on the movable tube 32, at least two bolts 37 are passed through the support tube 31, and the bolts 37 pass through the corresponding threaded holes 36, an electric hoist 33 is fixedly installed on the support tube 31, a lifting rope 34 is fixedly connected to the winding drum of the electric hoist 33, and the lifting rope 34 passes through the slide plate 3, the bottom end of the lifting rope 34 is fixedly connected to the lifting seat 2, two guide wheels 35 are rotatably connected to the upper side of the slide plate 3, and the lifting rope 34 is located between the two guide wheels 35, and the slide rail support unit includes a guide wheel 35 arranged below the bracket 1. A rail 38, a sliding seat 39 is slidably provided on the guide rail 38, a roller 40 adapted to the guide rail 38 is rotatably connected to the sliding seat 39, the sliding seat 39 is fixedly connected to the bracket 1, a positioning piece adapted to the guide rail 38 is installed on the sliding seat 39, and the positioning piece includes a plug plate 43 symmetrically arranged on both sides of the sliding seat 39, an outer sliding sleeve of the plug plate 43 is provided with a fixed sleeve 42, and the fixed sleeve 42 is fixedly connected to the sliding seat 39, a plurality of plug holes 41 adapted to the plug plate 43 are opened on the guide rail 38, the bottom end of the plug plate 43 is located in the corresponding plug hole 41, and the top of the plug plate 43 is fixedly connected to the second iron plate 44, and magnet blocks 45 are respectively fixedly connected to both sides of the sliding seat 39, and the magnet blocks 45 are located above the second iron plate 44; The staff drives the movable tube 32 to slide relative to the support tube 31 to adjust the initial spacing between the two brackets 1. When the spacing between the two brackets 1 is adjusted, the movable tube 32 is fixed relative to the support tube 31 through the cooperation of the bolt 37 and the threaded hole 36. The electric hoist 33 drives the lifting rope 34 to move. The lifting rope 34 can drive the lifting seat 2 and the guide plate 4 to move vertically relative to the slide plate 3. The two guide wheels 35 are designed to make the lifting rope 34 vertically penetrate the slide plate 3 to reduce the sliding between the lifting rope 34 and the slide plate 3. Friction, the guide rail 38 is placed on the ground, the staff pushes the bracket 1 to slide relative to the guide rail 38, and the roller 40 rolls on the guide rail 38. At this time, the top of the second iron plate 44 and the magnet block 45 are magnetically attracted. When the bracket 1 slides to the preset position relative to the guide rail 38, the staff drives the second iron plate 44 and the plug plate 43 to move downward relative to the fixed sleeve 42, and the second iron plate 44 is no longer magnetically attracted to the magnet block 45, so that the bottom end of the plug plate 43 is inserted into the corresponding socket 41, avoiding the bracket 1 and the sliding seat 39 from sliding relative to the guide rail 38, and then the lifting of the manhole cover can be started.

[0025] Working principle: the bracket 1 slides to the preset position through the slide rail support unit, the staff drives the slide plate 3 to slide relative to the bracket 1, so that the lifting seat 2 moves to the top of the cable manhole cover, and drives the lifting plate 5 to move relative to the lifting seat 2 through the position adjustment component, so that the insertion rod 6 moves to the top of the through hole on the manhole cover, and drives the lifting seat 2, the lifting plate 5 and the insertion rod 6 to move downward through the lifting mechanism, so that the insertion rod 6 passes through the through hole on the manhole cover, and the guide plate 4 slides relative to the slide plate 3. Through the design of the guide plate 4, the lifting seat 2 can move smoothly in the vertical direction. When the support plate 8 moves to the bottom of the manhole cover, the rotation adjustment The top of the structure drives the support plate 8 to rotate out of the receiving groove 7, and the support plate 8 is placed horizontally. The lifting seat 2, the lifting plate 5 and the insertion rod 6 are driven to move upward by the lifting mechanism, so that the support plate 8 drags the bottom of the manhole cover upward to complete the lifting of the manhole cover. The bracket 1 and the cable manhole cover slide through the slide rail support unit so that the manhole cover is no longer located above the working well. When the work in the working well on site is completed, similarly, the above steps are reversed to reset the manhole cover to the initial position. The staff then transfers the gantry to the next working well to be operated, so as to lift the cable manhole cover according to actual needs and complete the precise reset of the manhole cover. When the insertion rod 6 passes through the through hole on the manhole cover, the electromagnet 17 is powered off, and the electromagnet 17 and the first iron plate 18 are no longer magnetically attracted together. The movable plate 15, the prism 11 and the support column 16 move downward due to their own gravity. The bottom end of the support column 16 extends to the bottom of the lifting plate 5. The prism 11 drives the stop column 13 to move downward through the movable frame 12, so that the stop column 13 is no longer in contact with the support plate 8, and the limit on the position of the support plate 8 is released. At this time, the compression spring 20 is in a compressed state, and the compression spring 20 pushes the push plate 10 moves, so that the push plate 10 pushes the support block 9 to move out of the receiving groove 7, so that the top of the support plate 8 can be rotated out of the receiving groove 7, and finally the support plate 8 is placed horizontally, the bottom of the support plate 8 and the bottom inner wall of the receiving groove 7 are abutted, and at this time the push plate 10 is in contact with the anti-slip block 21. The design of the anti-slip block 21 prevents the push plate 10 from being separated from the fixed column 19. When the lifting plate 5 and the plug rod 6 move up, the support plate 8 can contact the bottom of the cable well cover, and finally the support plate 8 lifts the cable well cover out of the working well When the cable well cover is reset to the initial position, the lifting seat 2 is driven to move downward continuously through the lifting mechanism, so that the lifting plate 5 and the plug rod 6 move downward. At this time, the bottom end of the support column 16 contacts the ground, and the support column 16, the first iron plate 18, the prism 11, the movable frame 12 and the stop column 13 stop moving downward. As the lifting plate 5, the plug rod 6 and the support plate 8 continue to move downward, the top end of the stop column 13 pushes the support plate 8 to rotate in the opposite direction, and finally the top end of the support plate 8 is rotated into the receiving groove 7, and the support block 9 is again in contact with the push plate 1 0 abuts against each other, the compression spring 20 is in a compressed state, and the stop column 13 contacts the side of the support plate 8 away from the prism 11, preventing the support plate 8 from sliding out of the receiving groove 7, and at this time the first iron plate 18 moves up to one side of the electromagnet 17, the electromagnet 17 is energized, and the electromagnet 17 and the first iron plate 18 are magnetically attracted together, so that the stop column 13 and the movable frame 12 can be kept fixed relative to the insertion rod 6, and the lifting seat 2 is driven upward by the lifting mechanism, so that the insertion rod 6 can slide out of the through hole on the cable well cover; The staff drives the guide block 27 to slide in the annular groove 26 through the movable seat 25, and the staff drives the lifting plate 5 and the rotating seat 22 to slide relative to the rotating shaft 23 and the guide strip 24, so as to adjust the initial position of the plug rod 6 relative to the lifting seat 2. According to the number of through holes on the manhole cover, the staff drives the lifting plate 5, the rotating seat 22, the guide strip 24 and the rotating shaft 23 to rotate relative to the movable seat 25, so that the unused plug rod 6 can be rotated to the top of the lifting plate 5. When the position of the plug rod 6 is adjusted, the pressing ring 28 is driven downward by the hydraulic telescopic rod 30, and the pressing ring 28 presses the rotating seat 22, so that the rotating seat 22 is fixed relative to the lifting seat 2, and the position adjustment of the plug rod 6 is completed; The staff drives the movable tube 32 to slide relative to the support tube 31 to adjust the initial spacing between the two brackets 1. When the spacing between the two brackets 1 is adjusted, the movable tube 32 is fixed relative to the support tube 31 through the cooperation of the bolt 37 and the threaded hole 36. The electric hoist 33 drives the lifting rope 34 to move. The lifting rope 34 can drive the lifting seat 2 and the guide plate 4 to move vertically relative to the slide plate 3. The two guide wheels 35 are designed to make the lifting rope 34 vertically penetrate the slide plate 3 to reduce the sliding between the lifting rope 34 and the slide plate 3. Friction, the guide rail 38 is placed on the ground, the staff pushes the bracket 1 to slide relative to the guide rail 38, and the roller 40 rolls on the guide rail 38. At this time, the top of the second iron plate 44 and the magnet block 45 are magnetically attracted. When the bracket 1 slides to the preset position relative to the guide rail 38, the staff drives the second iron plate 44 and the plug plate 43 to move downward relative to the fixed sleeve 42, and the second iron plate 44 is no longer magnetically attracted to the magnet block 45, so that the bottom end of the plug plate 43 is inserted into the corresponding socket 41, avoiding the bracket 1 and the sliding seat 39 from sliding relative to the guide rail 38, and then the lifting of the manhole cover can be started.

[0026] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

Claims

1. A gantry for engineering construction, comprising two brackets (1), characterized in that: A lifting seat (2) is provided between the two brackets (1), a slide plate (3) is provided above the lifting seat (2), two ends of the slide plate (3) respectively penetrate the two brackets (1), two guide plates (4) are penetrated on the slide plate (3), and the bottom ends of the guide plates (4) are fixedly connected to the lifting seat (2), the top ends of the two brackets (1) are connected through a lifting mechanism, and the lifting mechanism is used to drive the lifting seat (2) to rise and fall in a vertical direction relative to the slide plate (3), a slide rail support unit is installed at the bottom end of the bracket (1), a plurality of lifting plates (5) are provided below the lifting seat (2), and a position adjustment component matched with the lifting plate (5) is installed on the lifting seat (2), and a plug rod (6) is fixedly connected to the bottom of the lifting plate (5), and a plurality of receiving grooves (7) are opened on the plug rod (6), and a support plate (8) is provided in the receiving groove (7), and the plug rod (6) is equipped with a rotation adjustment structure matched with the plurality of support plates (8).

2. The gantry for engineering construction according to claim 1, characterized in that: The rotation adjustment structure comprises a support block (9) fixedly mounted on the top of the support plate (8); the bottom end of the support plate (8) is rotatably connected to the receiving groove (7); a pushing unit adapted to the support block (9) is installed in the receiving groove (7); a prism (11) passes through the insertion rod (6); the bottom end of the prism (11) is fixedly connected to a movable frame (12) located below the insertion rod (6); a plurality of stop columns (13) are fixedly connected to the top of the movable frame (12); the number of the stop columns (13) and the support plate (8) is the same, and the stop columns (13) are in contact with the corresponding support plate (8); and the lifting plate (5) is installed with a vertical sliding unit adapted to the prism (11).

3. The gantry for engineering construction according to claim 2, characterized in that: The vertical sliding unit comprises a movable plate (15) fixedly mounted on the top of the prism (11); a control chamber (14) is provided in the lifting plate (5), and the movable plate (15) is located in the control chamber (14); a support column (16) is fixedly connected to the bottom of the movable plate (15), and the bottom end of the support column (16) passes through the lifting plate (5); and a magnetic attraction component compatible with the movable plate (15) is installed in the control chamber (14).

4. The gantry for engineering construction according to claim 3, characterized in that: The magnetic attraction member comprises an electromagnet (17) fixedly mounted in the control chamber (14); and a first iron plate (18) in contact with the electromagnet (17) is fixedly mounted on the movable plate (15).

5. The gantry for engineering construction according to claim 2, characterized in that: The pushing unit comprises a push plate (10) arranged on the side of the support block (9) facing the prism (11), the push plate (10) and the support block (9) are in contact, two fixing columns (19) are passed through the push plate (10), and the two fixing columns (19) are respectively located on both sides of the support block (9), a compression spring (20) is sleeved on the outside of the fixing column (19), and the two ends of the compression spring (20) are respectively fixedly connected to the push plate (10) and the inner wall of the accommodating groove (7), and an anti-slip block (21) is fixedly installed on the fixing column (19), and the anti-slip block (21) is located on the side of the push plate (10) away from the compression spring (20).

6. The gantry for engineering construction according to claim 1, characterized in that: The position adjustment assembly comprises a rotating seat (22) fixedly mounted on the lifting plate (5) at one end facing the lifting seat (2); a rotating shaft (23) passes through the rotating seat (22); a guide bar (24) is fixedly connected to the rotating shaft (23), and the guide bar (24) passes through the rotating seat (22); an annular groove (26) is provided on the lifting seat (2); a movable seat (25) is rotatably connected to one end of the rotating shaft (23) facing the lifting seat (2); a guide block (27) located in the annular groove (26) is fixedly mounted on the movable seat (25); a pressing ring (28) is provided above the lifting seat (2); the top of the rotating seat (22) is in contact with the bottom of the pressing ring (28); a mounting frame (29) is fixedly mounted on the guide plate (4); a hydraulic telescopic rod (30) is fixedly mounted on the mounting frame (29), and the telescopic end of the hydraulic telescopic rod (30) is fixedly connected to the pressing ring (28).

7. The gantry for engineering construction according to claim 1, characterized in that: The lifting mechanism comprises a support tube (31) arranged above the lifting seat (2), a movable tube (32) being slidably arranged in the support tube (31), the movable tube (32) and the support tube (31) being fixedly connected to the two brackets (1) respectively, a plurality of threaded holes (36) being opened on the movable tube (32), at least two bolts (37) passing through the support tube (31), and the bolts (37) passing through the corresponding threaded holes (36), an electric hoist (33) being fixedly mounted on the support tube (31), a lifting rope (34) being fixedly connected to the winding drum of the electric hoist (33), and the lifting rope (34) passing through the slide plate (3), and the bottom end of the lifting rope (34) being fixedly connected to the lifting seat (2).

8. The gantry for engineering construction according to claim 7, characterized in that: The upper part of the slide plate (3) is rotatably connected to two guide wheels (35), and the suspension rope (34) is located between the two guide wheels (35).

9. The gantry for engineering construction according to claim 1, characterized in that: The slide rail support unit comprises a guide rail (38) arranged below the bracket (1); a slide seat (39) is slidably provided on the guide rail (38); a roller (40) matching the guide rail (38) is rotatably connected to the slide seat (39); the slide seat (39) is fixedly connected to the bracket (1); and a positioning piece matching the guide rail (38) is installed on the slide seat (39).

10. The gantry for engineering construction according to claim 9, characterized in that: The positioning member comprises an insert plate (43) symmetrically arranged on both sides of the sliding seat (39); an outer sliding sleeve of the insert plate (43) is provided with a fixing sleeve (42), and the fixing sleeve (42) and the sliding seat (39) are fixedly connected; a plurality of insertion holes (41) adapted to the insert plate (43) are opened on the guide rail (38); the bottom end of the insert plate (43) is located in the corresponding insertion holes (41); the top end of the insert plate (43) is fixedly connected to a second iron plate (44); magnet blocks (45) are fixedly connected to both sides of the sliding seat (39), and the magnet blocks (45) are located above the second iron plate (44).

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