Old bridge dismantling and lifting device and method

Abstract

The invention discloses an old bridge dismantling and lifting device and method, and belongs to the technical field of bridge construction.The old bridge dismantling and lifting device comprises a bottom frame, the bottom frame comprises two symmetrically-distributed bottom plates, a plurality of stable structures distributed in a linear array mode are arranged between the two bottom plates, and two symmetrically-distributed baffles are arranged on the opposite sides of the two bottom plates; clamping blocks are fixedly installed on the sides, close to the bottom plates on the same side, of the two baffles on the same side, clamping grooves matched with the clamping blocks on the same side are formed in the opposite sides of the two bottom plates, movable grooves are formed in the inner walls of the clamping grooves, and positioning assemblies are arranged in the movable grooves. And the two baffles on the same side and the bottom plate on the same side are fixed through first bolts. Through the arrangement of the bottom frame and the stabilizing structure, the effect of supporting and stabilizing the bottom of the old bridge is achieved, through cooperation of the baffle, the top plate and the connecting plate, the stability of hoisting of the old bridge is kept, and the possibility of fracture of the old bridge is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and more specifically to a lifting device and method for dismantling an old bridge. Background Art

[0002] Bridges generally refer to structures built across rivers, lakes, and seas to allow vehicles and pedestrians to pass smoothly. In order to adapt to the modern high-speed development of the transportation industry, bridges are also extended to buildings that are built across mountain streams, poor geology, or to meet other transportation needs to make passage more convenient. Some bridges are made of reinforced concrete. When a bridge is used for a long time, it may need to be dismantled and rebuilt.

[0003] Some existing bridge dismantling methods are to cut off the main body of the bridge, and then use the existing crane with two sections of steel cables set at both ends of the bridge to lift it and place it in a safe location. When the old bridge is used for a long time or is overloaded, it may cause serious aging of the bridge. There is no stable structure at the bottom of the lifted bridge. When the bridge is lifted, it may break from the middle and fall, which is less safe. Therefore, in order to solve the above problems, we propose a lifting device and method for dismantling old bridges. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a bridge dismantling and lifting device and method, which adopts the following technical solutions:

[0005] A lifting device for dismantling an old bridge comprises a base frame, wherein the base frame comprises two symmetrically distributed base plates, a plurality of stable structures distributed in a linear array are arranged between the two base plates, two symmetrically distributed baffles are arranged on opposite sides of the two base plates, a clamping block is fixedly installed on one side of the two baffles on the same side close to the base plates on the same side, a clamping groove matching the clamping block on the same side is provided on the opposite sides of the two base plates, a movable groove is provided on the inner wall of the clamping groove, a positioning assembly is arranged in the movable groove, and the two baffles on the same side are fixed to the base plates on the same side by a first bolt;

[0006] The surfaces of the baffles are provided with through grooves, and the two bottom plates are provided with top plates, and the tops of the top plates are fixed with two symmetrically distributed support plates, and the baffles and the support plates on the same side are screwed and fixed by third bolts and nuts, and a connecting plate is provided between the two baffles in the longitudinal direction, and the two ends of the connecting plate are fixed to the baffles on the same side by second bolts;

[0007] A sling structure is provided between the two connecting plates, and the sling structure includes a main steel cable, and two symmetrically distributed auxiliary steel cables are provided at the bottom of the main steel cable. Second hooks are provided at the bottom of the two auxiliary steel cables, and first lifting ears matching the second hooks on the same side are provided at the tops of the two connecting plates.

[0008] By adopting the above technical solution, when the equipment is used, the staff will place the two bottom plates at the bottom of the old bridge, and then pass the existing fixing bolts through the bottom plates and extend them into the old bridge, which can play the role of fixing the bottom plates. When the two bottom plates are installed, the staff will place a stabilizing structure between the two bottom plates, and through the setting of multiple groups of stabilizing structures, it can play a role in supporting and stabilizing the old bridge, which is conducive to maintaining the stability of the old bridge lifting. Subsequently, the baffle is placed on the outside of the bottom plate, so that the block installed on the side wall of the lower section of the baffle is engaged with the slot opened on the side wall of the bottom plate, which can play the role of preliminarily fixing the baffle, and a positioning component is provided in the slot, which plays the role of positioning and fixing the block, and then plays the role of positioning the baffle, and then the first bolt is passed through the baffle and the bottom plate. The plate can play the role of fixing the baffle. When the baffle is fixed, the staff will place the top plate on the top of the old bridge, and then assemble the baffle and the top plate through the cooperation of the third bolt, nut and the support plate installed on the top of the top plate. The surface of the baffle is provided with through grooves, which is convenient for assembling old bridges of different thicknesses. Then, the connecting plate is placed between the two longitudinal baffles and fixed by the second bolt. Then, the second hooks installed at the ends of the two auxiliary steel cables in the sling structure are hooked with the first lifting ear installed on the top of the connecting plate. The cooperation of the baffle rod and the third spring in the second hook is conducive to maintaining the stability of the connection between the second hook and the first lifting ear on the same side. Then, the main steel cable is connected to the existing crane, and then the old bridge can be lifted by the crane.

[0009] Furthermore, the stabilizing structure includes a support rod arranged between the two bottom plates, both ends of the support rod are provided with storage grooves, and moving rods are slidably installed in the storage grooves, and support blocks are fixedly installed on the opposite ends of the two moving rods in the same group, and support grooves matching the support blocks on the same side are provided on the opposite sides of the two bottom plates, and a second spring is fixedly connected between the opposite sides of the two moving rods in the same group and the inner walls on the opposite sides of the storage grooves in the same group, and handles are fixedly installed on the bottoms of the opposite ends of the two moving rods in the same group, and the bottom ends of the handles slide through the storage grooves in the same group, and the bottom ends of the two bottom plates are provided with a plurality of support blocks distributed in a linear array, and the top ends of the support blocks on the same side are in contact with the bottom ends of the corresponding moving rods on the same side.

[0010] By adopting the above technical solution, when the base plate is installed, the moving rod on the same side is pulled by the handle to slide into the same group of storage grooves, and then the support rod and the moving rod of the same group are placed between the two base plates, so that the support block provided at the opposite end of the moving rod is engaged with the support groove opened on the inner side of the base plate. Through the cooperation of the moving rod and the second spring, the distance between the two moving rods of the same group can be adjusted, which is convenient for supporting old bridges of different widths. Through the cooperation of the support rod and the moving rod, the bottom of the old bridge can be supported and stabilized, which is beneficial to maintaining the stability of the old bridge when it is lifted.

[0011] Furthermore, sliders are fixedly installed on both sides of the opposite ends of the two moving rods in the same group, and the inner wall of the storage groove is provided with a sliding groove matching the sliders on the same side.

[0012] By adopting the above technical solution, when the moving rod slides in the same group of storage grooves, the moving rod slides with the same group of sliders in the same side slide grooves. The cooperation of the sliders and the slide grooves is helpful to maintain the sliding stability of the moving rod and help prevent the moving rod from leaving the same group of storage grooves.

[0013] Furthermore, the positioning assembly includes a positioning rod slidably installed in the movable groove, and a first spring is fixedly connected between the inner wall of the side of the positioning rod away from the same side of the blocking block and the side opposite to the movable groove of the same group, and the side wall of the blocking block is provided with a positioning groove matching the opposite end of the positioning rod of the same group.

[0014] By adopting the above technical solution, when the card block slides into the card slot of the same group, the card block pushes the positioning rod of the same group to slide into the movable groove of the same group, and the positioning rod pushes the first spring of the same group to contract. When the card block slides in the card slot of the same group, the positioning rod returns to its original position under the elastic force of the first spring of the same group, and the positioning rod engages with the positioning groove of the side wall of the card block of the same group, which can play the role of positioning and fixing the card block, and then play the role of positioning and fixing the baffle.

[0015] Furthermore, two symmetrically distributed limit blocks are fixedly mounted on the side wall of the positioning rod close to one end of the first spring on the same side, and the inner wall of the movable groove is provided with limit grooves matching the two limit blocks in the same group.

[0016] By adopting the above technical solution, when the positioning rod slides in the same group of movable grooves, the positioning rod slides in the same side limit groove with the same group of limit blocks. The cooperation between the limit blocks and the limit grooves is conducive to maintaining the sliding stability of the positioning rod and helps to prevent the positioning rod from leaving the same group of movable grooves.

[0017] Furthermore, two symmetrically distributed positioning blocks are fixedly mounted at both ends of the two connecting plates, and grooves matching the positioning blocks are formed at the tops of the baffles.

[0018] By adopting the above technical solution, when installing the connecting plate, the staff places the connecting plate between the two longitudinal baffles, and then makes the positioning blocks installed on both sides of the connecting plate engage with the grooves opened at the top of the baffle, which can play the role of positioning the connecting plate and facilitate subsequent fixing by the second bolt.

[0019] Furthermore, the inner side walls of the second hooks are hinged with a blocking rod, and a third spring is fixedly connected between the side walls of the blocking rod and the inner walls of the second hooks in the same group.

[0020] By adopting the above technical solution, the cooperation of the blocking rod and the third spring in the second hook can prevent the second hook from being separated from the first hanging ear in the same group, which is beneficial to maintaining the stability of the connection between the second hook and the first hanging ear on the same side.

[0021] Furthermore, the two side walls of the auxiliary steel cables are each provided with a sleeve, and the two side walls of the sleeve are provided with two second lifting ears that are rotationally symmetrically distributed, and the top ends of the two top plates are each fixedly mounted with two symmetrically distributed pulling steel cables, and the top ends of the pulling steel cables are each provided with a first hook, and the first hook is hooked with the second lifting ear on the same side.

[0022] By adopting the above technical solution, after the second hook is connected with the first lifting lug of the same group, the staff pulls the pulling cable through the first hook, and then the first hook is connected with the second lifting lug installed on the side wall of the corresponding auxiliary steel cable, which plays a role of pulling and stabilizing, and is beneficial to maintaining the stability of the lifting of the old bridge.

[0023] Furthermore, a plurality of limit plates distributed in a linear array are provided on opposite sides of the two base plates, and plug blocks are fixedly installed on the bottom of the limit plates close to the base plates on the same side, and slots matching the plug blocks on the same side are provided on opposite sides of the two base plates, and rubber rods are fixedly installed on the slots away from the limit plates on the same side, and rubber grooves matching the rubber rods in the same group are provided on the plug blocks away from the limit plates in the same group.

[0024] By adopting the above technical solution, when the two base plates are installed, the staff will engage the plug installed on the side wall of the limit plate with the slot opened on the outer side of the base plate, and a rubber rod is provided in the slot. When the plug and the corresponding slot are engaged, the rubber rod installed in the slot engages with the rubber groove opened on the side wall of the plug, which can play a role in positioning and stabilizing the limit plate. Through the setting of the limit plate, the old bridge can be stabilized, which is conducive to maintaining the stability of the lifting of the old bridge.

[0025] A method for dismantling and lifting an old bridge comprises the following steps:

[0026] S1. Bottom plate assembly: place the two bottom plates at the bottom of the old bridge, then pass the existing fixing bolts through the bottom plates and extend into the old bridge to fix the bottom plates, then place the baffle plate on the outside of the bottom plates, so that the block installed on the side wall of the lower section of the baffle plate engages with the slot provided on the side wall of the bottom plate to initially fix the baffle plate, and a positioning assembly is provided in the slot to position and fix the block, and then to position the baffle plate, then the first bolt passes through the baffle plate and the bottom plate to fix the baffle plate, when the baffle plate is fixed, the staff places the top plate on the top of the old bridge, then the third bolt, nut and the support plate installed on the top of the top plate cooperate to assemble the baffle plate and the top plate, and the baffle plate surface is provided with a through groove to facilitate the assembly of old bridges of different thicknesses, then the connecting plate is placed between the two longitudinal baffle plates and fixed by the second bolt;

[0027] S2. Installation of a stable structure: When the installation of the bottom plate is completed, the same-side moving rod is pulled by the handle to slide into the same group of storage grooves, and then the same group of support rods and moving rods are placed between the two bottom plates, so that the support blocks provided at the opposite ends of the moving rods are engaged with the support grooves provided on the inner side of the bottom plates. Through the cooperation of the moving rod and the second spring, the distance between the two moving rods in the same group can be adjusted, which is convenient for supporting old bridges of different widths. Through the cooperation of the support rod and the moving rod, the bottom of the old bridge can be supported and stabilized, which is conducive to maintaining the stability of the old bridge hoisting;

[0028] S3. Lifting the old bridge: After the base plate, stabilizing structure, baffle and connecting plate are installed, the second hooks installed at the ends of the two auxiliary steel cables in the sling structure are hooked with the first lifting ear installed at the top of the connecting plate. The cooperation of the baffle rod and the third spring in the second hook is conducive to maintaining the stability of the connection between the second hook and the first lifting ear on the same side. Then the main steel cable is connected to the existing crane, and then the old bridge can be lifted by the crane.

[0029] In summary, the present invention includes the following beneficial technical effects:

[0030] (1) In the present invention, the bottom of the old bridge is supported and stabilized by the arrangement of the base frame and the stabilizing structure, and the coordination of the baffle, the top plate and the connecting plate helps to maintain the stability of the old bridge hoisting and reduces the possibility of the old bridge breaking.

[0031] (2) In the present invention, by setting up the sling structure and cooperating with the main steel cable and the auxiliary steel cable, it is convenient to use the existing crane to lift the old bridge, and a pulling steel cable is provided between the top plate and the auxiliary steel cable, which is beneficial to maintaining the stability of the lifting of the old bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention;

[0033] Figure 2 For the present invention Figure 1 The enlarged view of point A in the middle;

[0034] Figure 3 For the present invention Figure 1 The enlarged view of point B in the middle;

[0035] Figure 4 For the present invention Figure 1 Enlarged view of point C in the middle;

[0036] Figure 5 For the present invention Figure 1 The enlarged view of point D in the middle;

[0037] Figure 6 A bottom view of the present invention;

[0038] Figure 7 A top cross-sectional view of the bottom plate and the support rods of the present invention;

[0039] Figure 8 For the present invention Figure 7 Enlarged view of point E in the middle;

[0040] Fig. 9 For the present invention Figure 7 The enlarged view of F in the middle;

[0041] Fig.10 It is a display diagram of the stable structure in the present invention.

[0042] Description of the numbers in the figure:

[0043] 1. chassis; 11. bottom plate; 111. support block; 112. slot; 113. support slot; 114. card slot; 1141. movable slot; 1142. first spring; 1143. positioning rod; 1121. rubber rod; 12. stable structure; 121. support rod; 1211. storage slot; 1212. second spring; 122. moving rod; 1221. support block; 2. baffle; 21. first bolt; 22. through slot; 23. first Two bolts; 24, groove; 25, block; 3, limit plate; 31, plug block; 4, top plate; 42, support plate; 41, pulling cable; 411, first hook; 5, third bolt; 51, nut; 6, connecting plate; 61, first lifting ear; 62, positioning block; 7, sling structure; 71, main cable; 72, auxiliary cable; 721, sleeve; 722, second lifting ear; 73, second hook; 731, stop rod; 732, third spring. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The following is combined with Figure 1-10 The present invention is described in further detail.

[0048] See also Figure 1-10, a bridge old bridge demolition lifting device comprises a base frame 1, the base frame 1 comprises two symmetrically distributed base plates 11, a plurality of stable structures 12 distributed in a linear array are arranged between the two base plates 11, the stable structure 12 comprises a support rod 121 arranged between the two base plates 11, both ends of the support rod 121 are provided with a receiving groove 1211, a moving rod 122 is slidably installed in the receiving groove 1211, and a support block 1221 is fixedly installed on the opposite ends of the two moving rods 122 of the same group, and a support groove 113 matching the support block 1221 on the same side is provided on the opposite side of the two base plates 11, a second spring 1212 is fixedly connected between the inner wall of the side opposite to the receiving groove 1211 of the same group on the opposite side of the two moving rods 122 of the same group, a handle is fixedly installed on the bottom of the opposite end of the two moving rods 122 of the same group, and the bottom end of the handle slides through the receiving groove 1211 of the same group, and a plurality of support blocks distributed in a linear array are arranged on the bottom ends of the two base plates 11 111, the top of the support block 111 on the same side contacts the bottom end of the corresponding moving rod 122 on the same side. When the equipment is used, the staff places the two bottom plates 11 on the bottom of the old bridge, and then passes through the bottom plate 11 and extends into the old bridge through the existing fixing bolts, which can fix the bottom plate 11. When the two bottom plates 11 are installed, the moving rod 122 on the same side is pulled by the handle to slide into the same group of storage grooves 1211, and then the support rod 121 and the moving rod 122 of the same group are placed between the two bottom plates 11, so that the support block 1221 provided at the opposite end of the moving rod 122 is engaged with the support groove 113 opened on the inner side of the bottom plate 11, and the cooperation of the moving rod 122 and the second spring 1212 can play the role of adjusting the distance between the two moving rods 122 of the same group, which is convenient for supporting old bridges of different widths. Through the cooperation of the support rod 121 and the moving rod 122, it can play the role of supporting and stabilizing the bottom of the old bridge, which is conducive to maintaining the stability of the old bridge hoisting.

[0049] Slide blocks are fixedly installed on both sides of the opposite ends of the two moving rods 122 in the same group, and the inner wall of the storage groove 1211 is provided with a sliding groove matching the sliding block on the same side. When the moving rod 122 slides in the storage groove 1211 of the same group, the moving rod 122 slides in the sliding groove on the same side with the sliding block of the same group. The cooperation of the sliding block and the sliding groove is conducive to maintaining the sliding stability of the moving rod 122 and helps to prevent the moving rod 122 from escaping from the storage groove 1211 of the same group.

[0050] Two symmetrically distributed baffles 2 are provided on opposite sides of the two bottom plates 11, and blocks 25 are fixedly installed on the two baffles 2 on the same side close to the bottom plates 11 on the same side. A slot 114 matching the slot 25 on the same side is provided on the opposite sides of the two bottom plates 11, and a movable slot 1141 is provided on the inner wall of the slot 114. A positioning assembly is provided in the movable slot 1141, and the two baffles 2 on the same side are fixed to the bottom plates 11 on the same side by a first bolt 21. The positioning assembly includes a positioning rod 1143 slidably installed in the movable slot 1141, and a first spring 1142 is fixedly connected between the inner wall of the positioning rod 1143 away from the side of the slot 25 on the same side and opposite to the movable slot 1141 of the same group, and a positioning slot matching the opposite end of the positioning rod 1143 of the same group is provided on the side wall of the block 25.

[0051] The staff places the baffle 2 on the outside of the base plate 11, so that the block 25 installed on the side wall of the lower section of the baffle 2 engages with the slot 114 opened on the side wall of the base plate 11, which can play a role in preliminarily fixing the baffle 2. When the block 25 slides into the slot 114 of the same group, the block 25 pushes the positioning rod 1143 of the same group to slide into the movable slot 1141 of the same group, and the positioning rod 1143 pushes the first spring 1142 of the same group to contract. When the block 25 slides in the slot 114 of the same group, the positioning rod 1143 returns to its original position under the elastic force of the first spring 1142 of the same group, and the positioning rod 1143 engages with the positioning slot of the side wall of the block 25 of the same group, which can play a role in positioning and fixing the block 25, and then plays a role in positioning and fixing the baffle 2.

[0052] Two symmetrically distributed limit blocks are fixedly installed on the side wall of the positioning rod 1143 near one end of the first spring 1142 on the same side, and the inner wall of the movable groove 1141 is provided with a limit groove matching the two limit blocks in the same group. When the positioning rod 1143 slides in the movable groove 1141 of the same group, the positioning rod 1143 slides in the limit groove on the same side with the limit blocks of the same group. The cooperation between the limit blocks and the limit grooves is conducive to maintaining the sliding stability of the positioning rod 1143 and helps to prevent the positioning rod 1143 from leaving the movable groove 1141 of the same group.

[0053] The surface of the baffle plate 2 is provided with a through groove 22, and a top plate 4 is provided above the two bottom plates 11. Two symmetrically distributed support plates 42 are fixedly installed on the top of the top plate 4. The baffle plate 2 and the support plate 42 on the same side are screwed and fixed by a third bolt 5 and a nut 51. A connecting plate 6 is provided between the two longitudinal baffle plates 2. The two ends of the connecting plate 6 and the baffle plate 2 on the same side are fixed by a second bolt 23. Two symmetrically distributed positioning blocks 62 are fixedly installed on both ends of the two connecting plates 6. A groove 24 matching the positioning block 62 is provided on the top of the baffle plate 2. When the baffle plate 2 After the fixation is completed, the staff places the top plate 4 on the top of the old bridge, and then cooperates with the third bolt 5, the nut 51 and the support plate 42 installed on the top of the top plate 4 to assemble the baffle plate 2 and the top plate 4. The surface of the baffle plate 2 is provided with a through groove 22, which is convenient for assembling old bridges of different thicknesses. Then, the connecting plate 6 is placed between the two longitudinal baffle plates 2. Then, the positioning blocks 62 installed on both sides of the connecting plate 6 are engaged with the grooves 24 opened on the top of the baffle plate 2, which can play the role of positioning the connecting plate 6, so as to facilitate the subsequent fixation by the second bolt 23.

[0054] A plurality of limiting plates 3 distributed in a linear array are provided on opposite sides of the two bottom plates 11. A plug-in block 31 is fixedly installed at the bottom of the limiting plate 3 close to the bottom plate 11 on the same side. A slot 112 matching the plug-in block 31 on the same side is provided on the opposite sides of the two bottom plates 11. A rubber rod 1121 is fixedly installed on the side of the slot 112 away from the limiting plate 3 on the same side. A rubber groove matching the rubber rod 1121 of the same group is provided on the side of the plug-in block 31 away from the limiting plate 3 of the same group. When the two bottom plates 11 are installed, After completion, the staff will engage the plug block 31 installed on the side wall of the limit plate 3 with the slot 112 opened on the outside of the bottom plate 11, and a rubber rod 1121 is provided in the slot 112. When the plug block 31 and the corresponding slot 112 are engaged, the rubber rod 1121 installed in the slot 112 engages with the rubber groove opened on the side wall of the plug block 31, which can play a role in positioning and stabilizing the limit plate 3. Through the setting of the limit plate 3, the old bridge can be stabilized, which is beneficial to maintaining the stability of the lifting of the old bridge.

[0055] A sling structure 7 is provided between the two connecting plates 6, and the sling structure 7 includes a main steel cable 71, and two symmetrically distributed auxiliary steel cables 72 are provided at the bottom end of the main steel cable 71, and second hooks 73 are provided at the bottom ends of the two auxiliary steel cables 72. The top ends of the two connecting plates 6 are provided with first lifting ears 61 matching the second hooks 73 on the same side, and the inner walls of the second hooks 73 are hinged with blocking rods 731, and third springs 732 are fixedly connected between the side walls of the blocking rods 731 and the inner walls of the second hooks 73 of the same group.

[0056] The side walls of the two auxiliary steel cables 72 are both sleeved with sleeves 721, and the side walls of the two sleeves 721 are provided with two second lifting ears 722 which are rotationally symmetrically distributed. The top ends of the two top plates 4 are fixedly installed with two symmetrically distributed pulling steel cables 41, and the top ends of the pulling steel cables 41 are both provided with first hooks 411, which are hooked with the second lifting ears 722 on the same side.

[0057] The second hooks 73 installed at the ends of the two auxiliary steel cables 72 in the staff's sling structure 7 are hooked with the first lifting ear 61 installed on the top of the connecting plate 6. The cooperation of the blocking rod 731 and the third spring 732 in the second hook 73 is beneficial to maintaining the stability of the connection between the second hook 73 and the first lifting ear 61 on the same side. When the second hook 73 is hooked with the first lifting ear 61 of the same group, the staff pulls the pulling steel cable 41 through the first hook 411, and then the first hook 411 is hooked with the second lifting ear 722 installed on the side wall of the corresponding auxiliary steel cable 72, which plays a role of pulling and stabilizing, and is beneficial to maintaining the stability of the lifting of the old bridge. Subsequently, the main steel cable 71 is connected to the existing crane, and then the old bridge can be lifted by the crane.

[0058] A method for dismantling and lifting an old bridge comprises the following steps:

[0059] S1, assembling the bottom plate 11: placing the two bottom plates 11 at the bottom of the old bridge, and then passing the bottom plates 11 through the existing fixing bolts and extending them into the old bridge, which can play the role of fixing the bottom plates 11, and then placing the baffle 2 on the outside of the bottom plate 11, so that the block 25 installed on the side wall of the lower section of the baffle 2 is engaged with the slot 114 opened on the side wall of the bottom plate 11, which can play the role of initially fixing the baffle 2, and a positioning component is provided in the slot 114, which plays the role of positioning and fixing the block 25, and then plays the role of positioning the baffle 2, and then the first bolt 21 is passed through the baffle 2 and the bottom plate 11, which can play the role of fixing the baffle 2, when the baffle 2 is fixed, the staff puts the top plate 4 on the top of the old bridge, and then cooperates with the third bolt 5, the nut 51 and the support plate 42 installed on the top of the top plate 4, which can play the role of assembling the baffle 2 and the top plate 4, and the surface of the baffle 2 is provided with the through groove 22, which is convenient for assembling old bridges of different thicknesses, and then the connecting plate 6 is placed between the two longitudinal baffles 2 and fixed by the second bolt 23;

[0060] S2, installation of the stable structure 12: when the installation of the bottom plate 11 is completed, the moving rod 122 on the same side is pulled by the handle to slide into the same group of storage grooves 1211, and then the support rod 121 and the moving rod 122 of the same group are placed between the two bottom plates 11, so that the support block 1221 provided at the opposite end of the moving rod 122 is engaged with the support groove 113 provided on the inner side of the bottom plate 11, and the cooperation between the moving rod 122 and the second spring 1212 can play the role of adjusting the distance between the two moving rods 122 of the same group, so as to facilitate supporting old bridges of different widths, and the cooperation between the support rod 121 and the moving rod 122 can play the role of supporting and stabilizing the bottom of the old bridge, which is conducive to maintaining the stability of the old bridge when it is hoisted;

[0061] S3. Lifting the old bridge: After the base plate 11, the stabilizing structure 12, the baffle plate 2 and the connecting plate 6 are installed, the second hooks 73 installed at the ends of the two auxiliary steel cables 72 in the sling structure 7 are hooked with the first lifting ear 61 installed at the top of the connecting plate 6. The cooperation of the blocking rod 731 and the third spring 732 in the second hook 73 is conducive to maintaining the stability of the connection between the second hook 73 and the first lifting ear 61 on the same side. Then, the main steel cable 71 is connected to the existing crane, and then the old bridge can be lifted by the crane.

[0062] The implementation principle of the embodiment of the present invention is as follows: when the device is used, the staff places the two bottom plates 11 at the bottom of the old bridge, and then passes through the bottom plates 11 and extends into the old bridge through the existing fixing bolts, which can play the role of fixing the bottom plates 11. When the two bottom plates 11 are installed, the staff places the stabilizing structure 12 between the two bottom plates 11. Through the provision of multiple groups of stabilizing structures 12, the old bridge can be supported and stabilized, which is conducive to maintaining the stability of the old bridge lifting. Subsequently, the baffle 2 is placed on the outside of the bottom plates 11, so that the block 25 installed on the side wall of the lower section of the baffle 2 is engaged with the slot 114 provided on the side wall of the bottom plate 11, which can play the role of preliminarily fixing the baffle 2, and a positioning component is provided in the slot 114, which plays the role of positioning and fixing the block 25, and then plays the role of positioning the baffle 2. Subsequently, the first bolt 21 is passed through the baffle 2 and the bottom plate 11, which can play the role of fixing the baffle. The function of the plate 2 is that when the baffle plate 2 is fixed, the staff places the top plate 4 on the top of the old bridge, and then cooperates with the third bolt 5, nut 51 and the support plate 42 installed on the top of the top plate 4 to assemble the baffle plate 2 and the top plate 4. The surface of the baffle plate 2 is provided with a through groove 22, which is convenient for assembling old bridges of different thicknesses. Then, the connecting plate 6 is placed between the two longitudinal baffle plates 2 and fixed by the second bolt 23. Then, the second hooks 73 installed at the ends of the two auxiliary steel cables 72 in the sling structure 7 are hooked with the first ear 61 installed on the top of the connecting plate 6. The cooperation of the baffle rod 731 and the third spring 732 in the second hook 73 is conducive to maintaining the stability of the connection between the second hook 73 and the first ear 61 on the same side. Then, the main steel cable 71 is connected to the existing crane, and then the old bridge can be lifted by the crane. The structure in the equipment is set according to the actual situation.

[0063] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lifting device for dismantling an old bridge, comprising a base frame (1), characterized in that: The base frame (1) comprises two symmetrically distributed base plates (11), a plurality of stable structures (12) distributed in a linear array are arranged between the two base plates (11), two symmetrically distributed baffles (2) are arranged on opposite sides of the two base plates (11), a clamping block (25) is fixedly installed on one side of the two baffles (2) close to the base plate (11) on the same side, a clamping groove (114) matching the clamping block (25) on the same side is provided on the opposite sides of the two base plates (11), a movable groove (1141) is provided on the inner wall of the clamping groove (114), a positioning assembly is provided in the movable groove (1141), and the two baffles (2) on the same side are fixed to the base plate (11) on the same side by a first bolt (21); The surfaces of the baffle plates (2) are each provided with a through groove (22), a top plate (4) is each provided above the two bottom plates (11), two symmetrically distributed support plates (42) are each fixedly mounted on the top of the top plate (4), the baffle plates (2) and the support plates (42) on the same side are screwed together and fixed by a third bolt (5) and a nut (51), a connecting plate (6) is each provided between the two baffle plates (2) in the longitudinal direction, and the two ends of the connecting plate (6) are fixed to the baffle plates (2) on the same side by a second bolt (23); A sling structure (7) is provided between the two connecting plates (6), the sling structure (7) comprising a main steel cable (71), two symmetrically distributed auxiliary steel cables (72) are provided at the bottom end of the main steel cable (71), a second hook (73) is provided at the bottom end of the two auxiliary steel cables (72), and a first lifting ear (61) matching the second hook (73) on the same side is provided at the top end of the two connecting plates (6).

2. The lifting device for dismantling an old bridge according to claim 1 is characterized in that: The stabilizing structure (12) comprises a support rod (121) arranged between two bottom plates (11), both ends of the support rod (121) are provided with receiving grooves (1211), a moving rod (122) is slidably installed in each of the receiving grooves (1211), a supporting block (1221) is fixedly installed at the opposite ends of the two moving rods (122) in the same group, and a supporting groove (113) matching the supporting block (1221) on the same side is provided on the opposite sides of the two bottom plates (11), and the two moving rods (122) in the same group are fixedly installed at the opposite ends of the two moving rods (122). A second spring (1212) is fixedly connected between the inner wall of the opposite side of the rod (122) and the opposite side of the storage groove (1211) of the same group, and a handle is fixedly installed at the bottom of the opposite end of the two moving rods (122) in the same group, and the bottom end of the handle slides through the storage groove (1211) of the same group. The bottom ends of the two bottom plates (11) are provided with a plurality of support blocks (111) distributed in a linear array, and the top ends of the support blocks (111) on the same side are in contact with the bottom ends of the corresponding moving rods (122) on the same side.

3. The lifting device for dismantling an old bridge according to claim 2 is characterized in that: Slide blocks are fixedly mounted on both sides of opposite ends of the two moving rods (122) in the same group, and a sliding groove matching the slide blocks on the same side is provided on the inner wall of the receiving groove (1211).

4. The lifting device for dismantling an old bridge according to claim 1 is characterized in that: The positioning assembly includes a positioning rod (1143) slidably installed in the movable groove (1141), and a first spring (1142) is fixedly connected between the inner wall of the positioning rod (1143) on the side away from the same side of the clamping block (25) and the side opposite to the movable groove (1141) of the same group, and the side wall of the clamping block (25) is provided with a positioning groove matching the opposite end of the positioning rod (1143) of the same group.

5. The lifting device for dismantling an old bridge according to claim 4 is characterized in that: Two symmetrically distributed limit blocks are fixedly mounted on the side wall of the positioning rod (1143) close to one end of the first spring (1142) on the same side, and the inner wall of the movable groove (1141) is provided with limit grooves matching the two limit blocks in the same group.

6. The lifting device for dismantling an old bridge according to claim 1 is characterized by: Two symmetrically distributed positioning blocks (62) are fixedly mounted at both ends of the two connecting plates (6), and grooves (24) matching the positioning blocks (62) are formed at the top ends of the baffle plates (2).

7. The lifting device for dismantling an old bridge according to claim 1 is characterized by: The inner side walls of the second hooks (73) are hinged with blocking rods (731), and a third spring (732) is fixedly connected between the side walls of the blocking rods (731) and the inner walls of the second hooks (73) in the same group.

8. The lifting device for dismantling an old bridge according to claim 1 is characterized by: The side walls of the two auxiliary steel cables (72) are both sleeved with a sleeve (721), and the side walls of the two sleeves (721) are provided with two second lifting ears (722) that are rotationally symmetrically distributed. The top ends of the two top plates (4) are both fixedly mounted with two symmetrically distributed pulling steel cables (41), and the top ends of the pulling steel cables (41) are both provided with a first hook (411), and the first hook (411) is hooked with the second lifting ear (722) on the same side.

9. The lifting device for dismantling an old bridge according to claim 1, characterized in that: A plurality of limiting plates (3) distributed in a linear array are provided on opposite sides of the two bottom plates (11); a plugging block (31) is fixedly installed at the bottom of the limiting plate (3) close to the bottom plate (11) on the same side; a slot (112) matching the plugging block (31) on the same side is provided on opposite sides of the two bottom plates (11); a rubber rod (1121) is fixedly installed on the side of the slot (112) away from the limiting plate (3) on the same side; and a rubber groove matching the rubber rod (1121) of the same group is provided on the side of the plugging block (31) away from the limiting plate (3) of the same group.

10. A method for dismantling and lifting an old bridge, according to the dismantling and lifting device for an old bridge according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Assembling the bottom plate (11): placing the two bottom plates (11) at the bottom of the old bridge, and then passing the existing fixing bolts through the bottom plates (11) and extending into the old bridge, thereby fixing the bottom plates (11). Then, placing the baffle plate (2) outside the bottom plate (11), and making the clamping block (25) installed on the side wall of the lower section of the baffle plate (2) engage with the clamping groove (114) provided on the side wall of the bottom plate (11), thereby preliminarily fixing the baffle plate (2). A positioning component is provided in the clamping groove (114), which plays the role of positioning and fixing the clamping block (25), and further plays the role of positioning the baffle plate (2). The baffle (2) is then fixed by passing the first bolt (21) through the baffle (2) and the bottom plate (11). When the baffle (2) is fixed, the staff places the top plate (4) on the top of the old bridge. The baffle (2) and the top plate (4) are then assembled by the third bolt (5), the nut (51) and the support plate (42) installed on the top of the top plate (4). The surface of the baffle (2) is provided with a through groove (22), which facilitates the assembly of old bridges of different thicknesses. The connecting plate (6) is then placed between the two longitudinal baffles (2) and fixed by the second bolt (23). S2. Installation of the stabilizing structure (12): After the installation of the base plate (11) is completed, the same-side moving rod (122) is pulled by the handle to slide into the same group of storage grooves (1211), and then the same group of support rods (121) and moving rods (122) are placed between the two base plates (11), so that the support block (1221) provided at the opposite end of the moving rod (122) is engaged with the support groove (113) provided on the inner side of the base plate (11). Through the cooperation of the moving rod (122) and the second spring (1212), the distance between the two moving rods (122) in the same group can be adjusted, which is convenient for supporting old bridges of different widths. Through the cooperation of the support rod (121) and the moving rod (122), the bottom of the old bridge can be supported and stabilized, which is conducive to maintaining the stability of the old bridge when it is lifted; S3. Lifting the old bridge: After the base plate (11), the stabilizing structure (12), the baffle plate (2) and the connecting plate (6) are installed, the second hooks (73) installed at the ends of the two auxiliary steel cables (72) in the sling structure (7) are hooked with the first lifting lug (61) installed at the top of the connecting plate (6). The cooperation of the baffle rod (731) and the third spring (732) in the second hook (73) helps to maintain the stability of the connection between the second hook (73) and the first lifting lug (61) on the same side. Then, the main steel cable (71) is connected to the existing crane, and then the old bridge can be lifted by the crane.

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