Flue expansion joint hoisting device

Abstract

The utility model relates to the technical field of thermal power plants, in particular to a flue expansion joint hoisting device, which not only facilitates the connection between an expansion joint and a flue and improves the working efficiency after the expansion joint is lifted to a specified height, but also enhances the safety in the hoisting process by hoisting the expansion joint by utilizing a vertical bearing piece and a hoisting plate. Comprising a hoisting mechanism; the device further comprises two sets of connecting mechanisms, a clamping mechanism, a bottom supporting mechanism and a limiting mechanism, the two sets of connecting mechanisms are both installed on the hoisting mechanism and used for hoisting an expansion joint screw, the clamping mechanism is installed on the hoisting mechanism and used for clamping a traction rope, and the bottom supporting mechanism is installed on the clamping mechanism and used for lifting an expansion joint. The limiting mechanism is installed on the bottom supporting mechanism and avoids dislocation of the bottom supporting mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of thermal power plants, and in particular to a flue gas expansion joint hoisting device. Background Technology

[0002] Denitrification systems are standard equipment in newly built thermal power plants in China. Among them, the denitrification flue is an important component of the denitrification system of boilers in thermal power plants, used to carry and transfer flue gas with high dust, high temperature and certain corrosiveness in the denitrification system.

[0003] Existing flue expansion joints, such as the expansion joint hoisting device disclosed in utility model patent application number 202020937373.2, mainly include a hoisting tool and a hoisting lug on the hoisting tool. The hoisting tool includes a horizontal load-bearing rod, on which two vertical load-bearing components are fitted. Each vertical load-bearing component has a hole at its lower part for fitting the end of the tie rod of the expansion joint. After the vertical load-bearing component is fitted onto the end of the tie rod, a nut is used to fit onto the tie rod as an axial limiting component for the vertical load-bearing component. In use, first adjust the two nuts on the inner and outer sides of the flange to the preset position, then fit the two vertical load-bearing components onto the two ends of the tie rod respectively, then fit and lock the nuts on the outer side of the vertical load-bearing components, and finally hang the hoisting lug on the hook of the hoisting equipment to hoist the expansion joint. After hoisting, first remove the nuts and limiting plates on the outer side of the vertical load-bearing components, and then remove the vertical load-bearing components axially.

[0004] However, existing hoisting equipment requires the expansion joint to be removed from the hoisting equipment and then connected to the flue after being lifted to the designated height. This is very troublesome and inconvenient for high-altitude construction. Moreover, existing hoisting equipment lacks corresponding protective measures, and it is very dangerous if the expansion joint falls. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a flue expansion joint hoisting device that not only facilitates the connection between the expansion joint and the flue after the expansion joint is raised to a specified height, thus improving work efficiency, but also enhances the safety of the hoisting process by using vertical load-bearing components and hanging plates to hoist the expansion joint.

[0006] This utility model discloses a flue expansion joint hoisting device, including a hoisting mechanism; it also includes two sets of connecting mechanisms, a clamping mechanism, a bottom-supporting mechanism, and a limiting mechanism. Both sets of connecting mechanisms are installed on the hoisting mechanism to hoist the expansion joint's screw. The clamping mechanism is installed on the hoisting mechanism to clamp the traction rope. The bottom-supporting mechanism is installed on the clamping mechanism to support the expansion joint. The limiting mechanism is installed on the bottom-supporting mechanism to prevent misalignment. The operator loops the crane's traction rope around the clamping mechanism and connects the hook on the traction rope to the hoisting mechanism. Then, the two sets of connecting mechanisms are used to hang the expansion joint's screw. The crane pulls the hoisting mechanism to lift the expansion joint off the ground. The bottom-supporting mechanism supports the middle part of the expansion joint, increasing its protection. The limiting mechanism prevents the bottom-supporting mechanism from misaligning and loosening during lifting. After the expansion joint is lifted to a designated height, the two sets of connecting mechanisms are rotated to release the pull on the expansion joint. The bottom-supporting mechanism then supports the expansion joint, facilitating its connection to the flue.

[0007] Preferably, the hoisting mechanism includes a lifting lug, a crossbeam, two sets of limiting plates, and two sets of limiting rings. The lifting lug has a positioning hole, the crossbeam is installed on the lifting lug, the two sets of limiting plates are respectively installed at both ends of the crossbeam, and the two sets of limiting rings are slidably installed on the crossbeam. The hook of the crane is hooked into the positioning hole of the lifting lug. By setting two sets of limiting plates, when the expansion joint tilts during hoisting, the two sets of connecting mechanisms and the two sets of limiting rings slide off the crossbeam. The distance between the two sets of limiting rings is adjusted according to the length of the expansion joint, thereby adjusting the distance between the two sets of connecting mechanisms.

[0008] Preferably, the connecting mechanism includes a vertical load-bearing component, a first spring, and a locking block. The vertical load-bearing component is slidably mounted on the crossbeam and has a mounting groove. The first spring is mounted on the vertical load-bearing component, and the bottom end of the locking block is connected to the top end of the first spring. When the operator presses down on the two sets of locking blocks, the screw of the expansion joint can be placed in the mounting groove of the two sets of vertical load-bearing components. Then, the operator releases the two sets of locking blocks, and the two sets of first springs push the two sets of locking blocks to rebound, preventing the screw from falling out of the mounting groove.

[0009] Preferably, the clamping mechanism includes two sets of columns, a top plate, a winding rod, four sets of second springs, and two sets of clamping plates. The bottom ends of the two sets of columns are connected to the top ends of the crossbeam, and the bottom end of the top plate is connected to the top ends of the two sets of columns. The winding rod is installed on the top plate, and all four sets of second springs are installed on the top plate. The two sets of clamping plates are slidably installed on the winding rod and are respectively connected to the top ends of the two sets of second springs. After the operator winds the crane's traction rope around the winding rod, the hook is hooked onto the lifting lug. The four sets of second springs push the two sets of clamping plates closer to clamp the traction rope, enhancing the connection effect between the device and the crane.

[0010] Preferably, the bottom support mechanism includes two sets of rotating shafts, two sets of hanging plates, and two sets of connecting plates. Both sets of rotating shafts are rotatably mounted on the top plate, and the two sets of hanging plates are slidably mounted on the two sets of rotating shafts respectively. The two sets of connecting plates are respectively mounted on the two sets of hanging plates and are connected in a fitting manner. When the expansion joint is lifted off the ground, the two sets of rotating shafts are rotated so that the two sets of connecting plates are located below the expansion joint. Then, the two sets of hanging plates are pushed closer together so that the two sets of connecting plates fit together to support and support the expansion joint.

[0011] Preferably, a rubber pad is also laid on the surface of the connecting plate; by laying the rubber pad, direct contact between the connecting plate and the surface of the expansion joint is avoided, and wear and scratches between them are prevented.

[0012] Preferably, the limiting mechanism includes four sets of positioning columns and two sets of positioning rods. The four sets of positioning columns are respectively installed on the two sets of connecting plates, and the positioning rods rest on the two sets of positioning columns on the same side. When the two sets of connecting plates are engaged, the two sets of positioning rods rest on the four sets of positioning columns to position the left and right sides of the two sets of connecting plates, preventing the two sets of connecting plates from sliding and separating during hoisting.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: the operator passes the crane's traction rope around the clamping mechanism and connects the hook on the traction rope to the lifting mechanism. Then, the two sets of connecting mechanisms are hung on the screw of the expansion joint. The crane pulls the lifting mechanism to lift the expansion joint off the ground. Then, the bottom support mechanism supports the middle part of the expansion joint, which increases the protection effect of the expansion joint. By setting a limiting mechanism, the bottom support mechanism is prevented from being misaligned and loosened during the lifting process. After the expansion joint is lifted to the designated height, the two sets of connecting mechanisms are rotated to release the pull on the expansion joint. The bottom support mechanism supports the expansion joint, which facilitates the connection between the expansion joint and the flue. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0015] Figure 2 This is a partially enlarged isometric structural diagram of the hoisting mechanism and connecting mechanism of this utility model;

[0016] Figure 3 This is a partially enlarged cross-sectional isometric structural diagram of the connection mechanism of this utility model;

[0017] Figure 4 This is a partially enlarged isometric structural diagram of the clamping mechanism of this utility model;

[0018] Figure 5 This is a cross-sectional axonometric structural diagram of the bottom support mechanism of this utility model;

[0019] Figure 6 This is a partially enlarged isometric structural diagram of the limiting mechanism of this utility model.

[0020] The attached diagram is labeled as follows: 01, hoisting mechanism; 11, lifting lug; 12, crossbeam; 13, limiting plate; 14, limiting ring; 02, connecting mechanism; 21, vertical load-bearing component; 22, first spring; 23, locking block; 03, clamping mechanism; 31, column; 32, top plate; 33, winding rod; 34, second spring; 35, clamping plate; 04, bottom support mechanism; 41, rotating shaft; 42, lifting plate; 43, connecting plate; 05, limiting mechanism; 51, positioning column; 52, positioning rod. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0022] Example 1

[0023] This utility model discloses a flue expansion joint hoisting device, including a hoisting mechanism 01; it also includes two sets of connecting mechanisms 02, a clamping mechanism 03, a bottom-supporting mechanism 04, and a limiting mechanism 05. Both sets of connecting mechanisms 02 are mounted on the hoisting mechanism 01 to hoist the expansion joint screw. The clamping mechanism 03 is mounted on the hoisting mechanism 01 to clamp the traction rope. The bottom-supporting mechanism 04 is mounted on the clamping mechanism 03 to support the expansion joint. The limiting mechanism 05 is mounted on the bottom-supporting mechanism 04 to prevent misalignment of the bottom-supporting mechanism 04. The hoisting mechanism 01 includes a lifting lug 11, a crossbeam 12, and two sets of limiting mechanisms 05. Positioning plate 13 and two sets of limiting rings 14; positioning holes are opened on the lifting lug 11; the crossbeam 12 is installed on the lifting lug 11; the two sets of limiting plates 13 are respectively installed at both ends of the crossbeam 12; the two sets of limiting rings 14 are slidably installed on the crossbeam 12; the connecting mechanism 02 includes a vertical load-bearing component 21, a first spring 22 and a locking block 23; the vertical load-bearing component 21 is slidably installed on the crossbeam 12; the vertical load-bearing component 21 has a mounting groove; the first spring 22 is installed on the vertical load-bearing component 21; the bottom end of the locking block 23 is connected to the top end of the first spring 22; the clamping mechanism 03 includes two sets of columns 31 and a top plate 32. The system consists of a winding rod 33, four sets of second springs 34, and two sets of clamping plates 35. The bottom ends of the two sets of uprights 31 are connected to the top ends of the crossbeam 12, and the bottom end of the top plate 32 is connected to the top ends of the two sets of uprights 31. The winding rod 33 is mounted on the top plate 32, and the four sets of second springs 34 are all mounted on the top plate 32. The two sets of clamping plates 35 are slidably mounted on the winding rod 33 and are respectively connected to the top ends of the two sets of second springs 34. During operation, the operator first winds the crane's traction rope around the winding rod 33, then hooks the hook onto the lifting lug 11. The four sets of second springs 34 push the two sets of clamping plates 35 closer to hold the traction rope. To enhance the connection between the device and the crane, two sets of limiting plates 13 are set up so that when the expansion joint tilts during hoisting, the two sets of connecting mechanisms 02 and the two sets of limiting rings 14 slide off the crossbeam 12. The distance between the two sets of limiting rings 14 is adjusted according to the length of the expansion joint, thereby adjusting the distance between the two sets of connecting mechanisms 02. The workers press down on the two sets of locking blocks 23 to facilitate placing the screw of the expansion joint into the mounting slots of the two sets of vertical load-bearing components 21. Then, the two sets of locking blocks 23 are released, and the two sets of first springs 22 push the two sets of locking blocks 23 to rebound, preventing the screw from falling out of the mounting slot. The crane then lifts the expansion joint.

[0024] Example 2

[0025] like Figures 1 to 6As shown, this utility model discloses a flue expansion joint hoisting device based on embodiment 1. The bottom support mechanism 04 includes two sets of rotating shafts 41, two sets of hanging plates 42, and two sets of connecting plates 43. Both sets of rotating shafts 41 are rotatably mounted on the top plate 32, and the two sets of hanging plates 42 are slidably mounted on the two sets of rotating shafts 41 respectively. The two sets of connecting plates 43 are respectively mounted on the two sets of hanging plates 42 and are connected in a fitting manner. It also includes a rubber pad laid on the surface of the connecting plate 43. The limiting mechanism 05 includes four sets of positioning columns 51 and two... A positioning rod 52 and four positioning columns 51 are respectively installed on two sets of connecting plates 43. The positioning rod 52 rests on the two sets of positioning columns 51 on the same side. During operation, firstly, the worker winds the crane's traction rope around the winding rod 33, and then hooks the hook onto the lifting lug 11. The four sets of second springs 34 push the two sets of clamping plates 35 closer to hold the traction rope, enhancing the connection effect between the device and the crane. By setting two sets of limiting plates 13, when the expansion joint tilts during hoisting, the two sets of connecting mechanisms 02 and the two sets of limiting rings 14 are released from the crossbeam 12. The expansion joint slides down, and the distance between the two sets of limiting rings 14 is adjusted according to the length of the expansion joint, thereby adjusting the distance between the two sets of connecting mechanisms 02. The operator presses down on the two sets of locking blocks 23 to facilitate placing the screw of the expansion joint into the mounting slots of the two sets of vertical load-bearing components 21. Then, the two sets of locking blocks 23 are released, and the two sets of first springs 22 push the two sets of locking blocks 23 to rebound, preventing the screw from falling out of the mounting slot. The crane pulls the lifting mechanism 01 to lift the expansion joint off the ground, and the two sets of rotating shafts 41 are rotated so that the two sets of connecting plates 43 are positioned in the expansion joint. Below the section, push the two sets of hanging plates 42 closer together so that the two sets of connecting plates 43 fit together to support the expansion joint. After the two sets of connecting plates 43 fit together, use the two sets of positioning rods 52 to rest on the four sets of positioning columns 51 to position the left and right sides of the two sets of connecting plates 43 to prevent the two sets of connecting plates 43 from sliding and separating during the hoisting process. After the expansion joint is raised to the specified height, rotate the two sets of connecting mechanisms 02 to release the pull on the expansion joint. Use the bottom support mechanism 04 to support the expansion joint to facilitate the connection between the expansion joint and the flue.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A flue gas expansion joint hoisting device, comprising a hoisting mechanism (01); characterized in that, It also includes two sets of connecting mechanisms (02), clamping mechanisms (03), bottom supporting mechanisms (04) and limiting mechanisms (05). Both sets of connecting mechanisms (02) are installed on the hoisting mechanism (01) to hoist the expansion joint screw. The clamping mechanism (03) is installed on the hoisting mechanism (01) to clamp the traction rope. The bottom supporting mechanism (04) is installed on the clamping mechanism (03) to lift the expansion joint. The limiting mechanism (05) is installed on the bottom supporting mechanism (04) to prevent the bottom supporting mechanism (04) from being misaligned.

2. The flue expansion joint hoisting device as described in claim 1, characterized in that, The hoisting mechanism (01) includes a lifting lug (11), a crossbeam (12), two sets of limiting plates (13) and two sets of limiting rings (14). The lifting lug (11) has a positioning hole. The crossbeam (12) is installed on the lifting lug (11). The two sets of limiting plates (13) are respectively installed at both ends of the crossbeam (12). The two sets of limiting rings (14) are slidably installed on the crossbeam (12).

3. The flue expansion joint hoisting device as described in claim 2, characterized in that, The connecting mechanism (02) includes a vertical load-bearing component (21), a first spring (22) and a locking block (23). The vertical load-bearing component (21) is slidably mounted on the crossbeam (12). The vertical load-bearing component (21) has a mounting groove. The first spring (22) is mounted on the vertical load-bearing component (21). The bottom end of the locking block (23) is connected to the top end of the first spring (22).

4. The flue expansion joint hoisting device as described in claim 2, characterized in that, The clamping mechanism (03) includes two sets of columns (31), a top plate (32), a winding rod (33), four sets of second springs (34), and two sets of clamping plates (35). The bottom ends of the two sets of columns (31) are connected to the top ends of the crossbeam (12), the bottom ends of the top plate (32) are connected to the top ends of the two sets of columns (31), the winding rod (33) is installed on the top plate (32), the four sets of second springs (34) are all installed on the top plate (32), and the two sets of clamping plates (35) are all slidably installed on the winding rod (33) and connected to the top ends of the two sets of second springs (34) respectively.

5. The flue expansion joint hoisting device as described in claim 4, characterized in that, The bottom support mechanism (04) includes two sets of rotating shafts (41), two sets of hanging plates (42) and two sets of connecting plates (43). Both sets of rotating shafts (41) are rotatably mounted on the top plate (32). The two sets of hanging plates (42) are slidably mounted on the two sets of rotating shafts (41) respectively. The two sets of connecting plates (43) are mounted on the two sets of hanging plates (42) respectively and the two sets of connecting plates (43) are fitted together.

6. The flue gas expansion joint hoisting device as described in claim 5, characterized in that, It also includes a rubber pad laid on the surface of the connecting plate (43).

7. The flue expansion joint hoisting device as described in claim 5, characterized in that, The limiting mechanism (05) includes four sets of positioning columns (51) and two sets of positioning rods (52). The four sets of positioning columns (51) are respectively installed on two sets of connecting plates (43), and the positioning rods (52) rest on the two sets of positioning columns (51) on the same side.

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