A construction method for a split double-pulley double-wire rope tensioning hanging basket in an old renovation project

Abstract

The present invention discloses a split double-pulley double-wire rope tensioning hanging basket construction method for an old renovation project, wherein two second pulley devices are added, the second pulley device comprises an angle steel connecting seat, a second pulley mounting seat, a second tensioning pulley, a tensioning screw and a fastening bolt, and a through-hole matching the first tensioning pulley is punched on the side of the top of the front support leg of the bracket near the first tensioning pulley, one side plate of the angle steel connecting seat is fitted with the front support leg of the bracket and penetrated by the tensioning screw, the two angle steel connecting seats are fixed to the front support leg by fastening bolts, the other side plate of the angle steel connecting seat is horizontally and the second pulley mounting seat is installed on the top, the second tensioning pulley top tensions the second steel wire rope, the second steel wire rope is passed through a position below the first tensioning pulley and between the first tensioning pulley, separating the first steel wire rope and the second steel wire rope, avoiding interference with each other and affecting the structural stability of the hanging basket bracket, and ensuring construction safety.

Description

Technical Field

[0001] The invention belongs to the field of building hanging baskets, and in particular relates to a construction method of a split double-pulley double-steel-wire-rope tensioning hanging basket for an old renovation project. Background Art

[0002] The ever-changing facade designs of various buildings are driving the development of the suspended basket industry. Standard suspended baskets have evolved into a variety of non-standard suspended baskets to meet the needs of construction sites. The national standard requires that the stability of standard suspended baskets with a counterweight suspension bracket greater than 1.7 meters in length must be verified separately. In actual engineering applications, special-shaped suspended baskets with double-loaded steel wire ropes are often used to meet the requirements of suspended basket front-end cantilever lengths greater than 1.7 meters, with a common cantilever of 2.3 meters.

[0003] In addition, the concept of "urban renewal" was first proposed at the Central Economic Work Conference in December 2019. In recent years, the number of renovation projects for old residential communities has increased. The protruding cantilevered balconies make it difficult to use standard hanging baskets during the renovation of the facades of old renovation projects. This is because the national standard requires that if the front bracket of the suspension mechanism needs to be supported on a non-load-bearing structure (such as a cantilevered component), it must be specially designed and reinforced. Reinforcement measures cannot be taken at the door of old residential community renovation projects, so a large number of old renovation projects require the use of hanging baskets with extra-long front cantilevers to meet the needs of facade decoration.

[0004] In the prior art, the two steel wire ropes need to share the same pulley on the top of the front support leg, which leads to increased friction of the steel wire ropes during tensioning, reduced stability and the risk of pulley jamming; or the second steel wire rope is directly placed on the square steel on the top of the front support leg, resulting in direct friction between the steel wire ropes and the hanging basket frame, further aggravating its wear.

[0005] The function of the hanging basket pulley is, firstly, to support and fix the wire rope to ensure that it is stable and does not shake; secondly, through the design of the pulley, the friction resistance of the wire rope during movement is reduced, making the lifting of the hanging basket smoother. In order to ensure that the hanging basket bracket can meet the structural stability, it is necessary to add a wire rope reinforcement in the middle part of the crossbeam of the hanging basket bracket. The technology can refer to the specification drawings of the patent with announcement number CN114876176A. However, due to the presence of two wire ropes for tensioning, the two wire ropes are guided and tensioned by the pulley on the top of the front support leg at the same time, which is easy to interfere with each other and affect the structural stability of the hanging basket bracket, thereby bringing safety hazards to construction. Construction safety is the top priority of construction, so it is necessary to overcome the above defects. Summary of the Invention

[0006] The present invention provides a split double-pulley double-wire rope tensioning hanging basket construction method for an old renovation project, which is used to solve the technical problems mentioned in the background technology.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a split double-pulley double-wire rope tensioning hanging basket construction method for old renovation projects, comprising the following steps: Step 1, preparation before construction, obtaining conventional parts required for the bracket of the extra-long cantilevered hanging basket, the conventional parts including the front support legs of the bracket, the rear support legs of the bracket, the bracket beam, the counterweight, the hanging basket and the lifting wire rope, the two ends of the beam have a first tensioning basket bolt connected to the first wire rope, the middle of the cantilever area of ​​the bracket beam and the middle of the bracket beam in the middle of the front support legs and the rear support legs of the bracket have a second tensioning basket bolt, the top of the front support leg of the bracket has a first tensioning pulley, the first tensioning pulley includes a first pulley mounting seat and a second pulley mounting seat. A tensioning pulley and two new second pulley devices are added. The second pulley device includes an angle steel connecting seat, a second pulley mounting seat, a second tensioning pulley, a tensioning screw and a fastening bolt. A through-hole that matches the first tensioning pulley is punched on the side of the top of the front leg of the bracket near the first tensioning pulley. One side plate of the angle steel connecting seat is fitted with the front leg of the bracket and penetrated by the tensioning screw. The two angle steel connecting seats are fixed to the front leg by fastening bolts. The other side plate of the angle steel connecting seat is horizontal and the second pulley mounting seat is installed on the top. The second steel wire rope is tensioned on the top of the second tensioning pulley, and the second steel wire rope is passed through the position below the first tensioning pulley and between the first tensioning pulley;

[0008] Step 2: Install the second pulley device on the front leg of the bracket through the tension screw, and install the front leg of the bracket, the rear leg of the bracket, the bracket beam and the counterweight according to the layout position;

[0009] Step 3: Install the first steel wire rope. After passing through the first tensioning pulley, the first steel wire rope is tensioned and tightened through the basket bolts at both ends.

[0010] Step 4: Install the second wire rope. The second wire rope passes between the first tensioning pulley and the first tensioning pulley and passes through the two second tensioning pulleys. Then, it is tensioned by the basket bolts at both ends of the second wire rope.

[0011] Step 5: Install the hanging basket and lifting wire rope at the cantilevered end of the beam.

[0012] By adopting the above technical solution, the advantages of this construction method are as follows: 1. A second pulley device is added to separate the first steel rope and the second steel rope, avoiding interference with each other and affecting the structural stability of the hanging basket bracket, thereby ensuring construction safety; 2. A structurally adapted second pulley device is proposed, which is arranged in pairs at the top of the front support leg of the bracket, cleverly utilizing the gap between the steel ropes of the first pulley to pass the second steel rope for support, and the structure is compact and reasonable; 3. The second pulley device reasonably supports the tensioning node of the second steel rope, and adopts two close second tensioning pulleys. In terms of reinforced bearing capacity, the structural stability can be increased several times compared with the first tensioning; 3. The installation of the second pulley device does not require complicated modification of the top of the front support leg. It only needs to be installed after drilling, without destroying the original structure. After disassembly, it can be used in cases where the cantilever length is not large, and can be adapted to single-wire rope tensioning; 4. The second pulley device has a simple structure but high strength, can effectively support and ensure tensioning force.

[0013] Preferably, the turning angle of the second steel wire rope at the second tensioning pulley is 145°.

[0014] By adopting the above technical solution, the overall structural shape of the second steel wire rope has a higher structural tensile strength.

[0015] Preferably, there are four tension screws distributed at the four corners of the side plate of the angle steel connecting seat.

[0016] By adopting the above technical solution, the connection strength between the angle steel connecting seat and the front supporting leg is high.

[0017] Preferably, a diagonal bracing triangle plate is provided on the inner side of the angle steel connecting seat.

[0018] By adopting the above technical solution, the structural strength of the angle steel connecting seat can be ensured.

[0019] Preferably, two diagonal bracing triangular plates are arranged side by side at intervals.

[0020] By adopting the above technical solution, the structural strength is higher.

[0021] Preferably, a vertical reinforcing rectangular tube is provided on the inner side of the angle steel connecting seat, and the reinforcing rectangular tube is welded to two sides of the angle steel connecting seat respectively.

[0022] By adopting the above technical solution, reinforcement can also be performed by setting a reinforcing rectangular tube.

[0023] Preferably, the second steel wire rope has a distance of no less than 1 cm from the top of the first pulley mounting seat floor.

[0024] By adopting the above technical solution, the second steel wire rope has flexible space, which is convenient for installation and tensioning.

[0025] Preferably, the distance between the first steel wire rope and the second steel wire rope at their closest locations is not less than 5 cm.

[0026] By adopting the above technical solution, the two steel ropes are prevented from affecting each other.

[0027] The beneficial effects of the present invention are as follows: 1. A second pulley device is newly added to separate the first steel rope and the second steel rope, thereby avoiding interference with each other and affecting the structural stability of the hanging basket bracket, and ensuring construction safety; 2. A structurally adapted second pulley device is proposed, which is arranged in pairs on the top of the front support leg of the bracket, and the gap between the steel ropes of the first pulley is cleverly utilized to pass the second steel rope for support, and the structure is compact and reasonable; 3. The second pulley device reasonably supports the tensioning node of the second steel rope, and adopts two close second tensioning pulleys. In terms of reinforced bearing capacity, the structural stability can be increased several times compared with the first tensioning; 3. The installation of the second pulley device does not require complicated modification of the top of the front support leg. It only needs to be installed after drilling a hole, without destroying the original structure. After disassembly, it can be used in the case of a small cantilever length, and can be adapted to single-channel steel rope tensioning; 4. The second pulley device has a simple structure but high strength, can effectively support, and ensure tensioning force. The second pulley assembly of this invention adopts a split design, enabling modular and rapid installation through angle steel connectors and tensioning screws. This eliminates the need for welding or cutting existing brackets, achieving a "split pulley layout" and "modular installation" for special-shaped hanging baskets. This invention achieves independent tensioning of the two steel ropes, completely eliminating the friction interference caused by traditional shared pulleys. This improves bracket stability and reduces wear on the steel ropes during use. It is suitable for high-risk working conditions with overhangs exceeding 1.7 meters, and is particularly well-suited for urban renewal projects renovating older residential communities.

[0028] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or may be understood by practicing the present invention; the main purpose and other advantages of the present invention can be realized and obtained through the solutions particularly pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0030] Figure 2 is a schematic diagram of a second pulley device according to an embodiment of the present invention;

[0031] Figure 3 is a side view of a second pulley assembly according to an embodiment of the present invention;

[0032] Figure 4 Schematic diagram of the reinforced rectangular tube according to an embodiment of the present invention.

[0033] Figure numerals: 1. Front support leg of the bracket; 2. Rear support leg of the bracket; 3. Crossbeam of the bracket; 4. Counterweight; 5. Hanging basket and lifting wire rope; 6. First pulley device; 61. First wire rope; 62. First pulley mounting seat; 63. First tensioning pulley; 7. Second pulley device; 71. Angle steel connecting seat; 72. Second pulley mounting seat; 73. Second tensioning pulley; 74. Tensioning screw; 75. Fastening bolt; 76. Second wire rope; 77. Diagonal support triangle plate; 78. Reinforced rectangular tube. DETAILED DESCRIPTION

[0034] The technical solutions of the present invention are described in detail below through examples. The following examples are merely exemplary and can only be used to explain and illustrate the technical solutions of the present invention, and cannot be interpreted as limiting the technical solutions of the present invention.

[0035] Combine Figure 1-4 A split double-pulley double-wire rope tensioning hanging basket construction method for an old renovation project includes the following steps: Step 1, preparation before construction, obtaining conventional parts required for the bracket of the extra-long cantilevered hanging basket, the conventional parts include the front support leg 1 of the bracket, the rear support leg 2 of the bracket, the bracket beam 3, the counterweight block 4, the hanging basket and the lifting wire rope 5, the two ends of the beam have a first tensioning basket bolt connected to the first wire rope 61, the middle of the cantilevered area of ​​the bracket beam 3 and the middle of the bracket beam 3 in the middle of the front support leg 1 and the rear support leg 2 of the bracket have a second tensioning basket bolt, the top of the front support leg 1 of the bracket has a first tensioning pulley 63, the first tensioning pulley 63 includes a first pulley mounting seat 62 and a first tensioning pulley 63, and two second pulley devices are added 7. The second pulley device 7 includes an angle steel connecting seat 71, a second pulley mounting seat 72, a second tensioning pulley 73, a tensioning screw 74 and a fastening bolt 75, and a through hole that cooperates with the first tensioning pulley 63 is punched on the side of the top of the front support leg 1 of the bracket near the first tensioning pulley 63. One side plate of the angle steel connecting seat 71 is in contact with the front support leg 1 of the bracket and penetrated by the tensioning screw 74. The two angle steel connecting seats 71 are fixed to the front support leg by fastening bolts 75. The other side plate of the angle steel connecting seat 71 is horizontally installed with the second pulley mounting seat 72 on the top. The second steel wire rope 76 is tensioned on the top of the second tensioning pulley 73. The second steel wire rope 76 is passed through the position below the first tensioning pulley 63 and between the first tensioning pulley 63;

[0036] Step 2: Install the second pulley device 7 on the front leg 1 of the bracket through the tension screw 74, and install the front leg 1, rear leg 2, crossbeam 3 and counterweight 4 according to the layout position;

[0037] Step 3: Install the first steel wire rope 61. After passing through the first tensioning pulley 63, the first steel wire rope 61 is tensioned and fastened by the turnbuckles at both ends.

[0038] Step 4: Install the second steel wire rope 76. The second steel wire rope 76 passes between the first tensioning pulley 63 and the first tensioning pulley 63, passes through the two second tensioning pulleys 73, and is then tensioned by the turnbuckles at both ends of the second steel wire rope 76.

[0039] Step 5: Install the hanging basket and lifting wire rope 5 at the cantilevered end of the beam.

[0040] The advantages of this construction method are as follows: 1. A second pulley device 7 is added to separate the first steel rope 61 and the second steel rope 76, thereby avoiding interference with each other and affecting the structural stability of the hanging basket support, and ensuring construction safety; 2. A structurally adapted second pulley device 7 is proposed, which is arranged in pairs at the top of the front support leg 1 of the support, and the gap between the first pulley wire ropes is cleverly utilized to pass the second steel rope 76 for support, resulting in a compact and reasonable structure; 3. The second pulley device 7 provides reasonable support for the tensioning node of the second steel rope 76, and adopts two close second tensioning pulleys 73. In terms of reinforced bearing capacity, the structural stability can be increased several times compared with the first tensioning; 3. The installation of the second pulley device 7 does not require complex modification of the top of the front support leg. It only needs to be installed after drilling, without damaging the original structure. After disassembly, it can be used in situations where the cantilever length is not large, and can be adapted to single-wire tensioning; 4. The second pulley device 7 has a simple structure but high strength, can effectively provide support, and ensure tensioning force. The second pulley assembly of this invention adopts a split design, enabling modular and rapid installation through angle steel connectors and tensioning screws. This eliminates the need for welding or cutting existing brackets, achieving a "split pulley layout" and "modular installation" for special-shaped hanging baskets. This invention achieves independent tensioning of the two steel ropes, completely eliminating the friction interference caused by traditional shared pulleys. This improves bracket stability and reduces wear on the steel ropes during use. It is suitable for high-risk working conditions with overhangs exceeding 1.7 meters, and is particularly well-suited for urban renewal projects renovating older residential communities.

[0041] The turning angle of the second steel wire rope 76 at the second tensioning pulley 73 is 145°, and the overall structural shape of the second steel wire rope 76 has a high structural tensioning strength.

[0042] There are four tension screws 74 distributed at the four corners of the side plate of the angle steel connecting seat 71, and the connection strength between the angle steel connecting seat 71 and the front support leg is high.

[0043] A diagonal bracing triangular plate 77 is provided inside the angle steel connecting seat 71 to ensure the structural strength of the angle steel connecting seat 71 .

[0044] Two diagonal bracing triangle plates 77 are arranged side by side at intervals, which increases the structural strength.

[0045] A vertical reinforcing rectangular tube 78 is provided inside the angle steel connecting seat 71 . The reinforcing rectangular tube 78 is welded to two sides of the angle steel connecting seat 71 , and the angle steel connecting seat 71 can also be reinforced by providing the reinforcing rectangular tube 78 .

[0046] There is a distance of no less than 1 cm between the second steel wire rope 76 and the top of the floor of the first pulley mounting seat 62 , and the second steel wire rope 76 has flexible space for easy installation and tensioning.

[0047] The first steel wire rope 61 and the second steel wire rope 76 are spaced at least 5 cm apart from each other at their closest locations to avoid the two steel wire ropes from interfering with each other.

[0048] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention.

Claims

1. A construction method for a split double-pulley double-wire rope tensioning hanging basket for an old renovation project, characterized by: The invention comprises the following steps: step 1, preparation before construction, obtaining conventional parts required for the bracket of the super-long cantilevered hanging basket, the conventional parts comprising the bracket front leg (1), the bracket rear leg (2), the bracket crossbeam (3), the counterweight (4), the hanging basket and the lifting wire rope (5), the two ends of the crossbeam having a basket bolt connected to the first wire rope (61), the middle part of the cantilevered area of ​​the bracket crossbeam (3) and the middle part of the bracket crossbeam (3) at the bracket front leg (1) and the bracket rear leg (2) having a basket bolt and connected to the second wire rope (76), the top of the bracket front leg (1) having a first pulley device (6), the first pulley device (6) comprising a first pulley mounting seat (62) and a first tensioning pulley (63), and two second pulley devices (7) are added, the second pulley device (7) comprising an angle steel connection The second pulley mounting seat (72) is provided on the top of the bracket front leg (1), and the second tensioning pulley (73) is tensioned by the tensioning screw (74) and the fastening bolt (75). A through hole is punched on the side of the first tensioning pulley (63) at the top of the bracket front leg (1). One side plate of the angle steel connecting seat (71) is fitted with the bracket front leg (1) and penetrated by the tensioning screw (74). The two angle steel connecting seats (71) are fixed to the front leg by fastening bolts (75). The other side plate of the angle steel connecting seat (71) is horizontally and top-mounted with the second pulley mounting seat (72). The second steel wire rope (76) is tensioned at the top of the second tensioning pulley (73). The second steel wire rope (76) is passed through the position below the first tensioning pulley (63) and between the first tensioning pulley (63). Step 2: Install the second pulley device (7) on the front support leg (1) of the bracket through the tension screw (74), and install the front support leg (1), the rear support leg (2), the bracket crossbeam (3) and the counterweight (4) according to the layout position; Step 3: Install the first steel wire rope (61). The first steel wire rope (61) passes through the first tensioning pulley (63) and is tensioned and fastened by the turnbuckles at both ends; Step 4: Install the second steel wire rope (76). The second steel wire rope (76) passes between the first tensioning pulley (63) and the first tensioning pulley (63) and passes through the two second tensioning pulleys (73). Then, it is tensioned by the basket bolts at both ends of the second steel wire rope (76); Step 5: Install the hanging basket and lifting wire rope (5) at the cantilevered end of the beam.

2. The construction method of a split double-pulley double-wire rope tensioning hanging basket for an old building renovation project according to claim 1 is characterized in that: The turning angle of the second steel wire rope (76) at the second tensioning pulley (73) is 145°.

3. The construction method of a split double-pulley double-wire rope tensioning hanging basket for an old building renovation project according to claim 2 is characterized in that: There are four tensioning screw rods (74) distributed at the four corners of the side plate of the angle steel connecting seat (71).

4. The construction method of a split double-pulley double-wire rope tensioning hanging basket for an old building renovation project according to claim 3 is characterized in that: A diagonal bracing triangular plate (77) is provided inside the angle steel connecting seat (71).

5. The construction method of a split double-pulley double-wire rope tensioning hanging basket for an old building renovation project according to claim 4 is characterized in that: Two diagonal support triangle plates (77) are arranged side by side at intervals.

6. The construction method of a split double-pulley double-wire rope tensioning hanging basket for an old building renovation project according to claim 3 is characterized by: A vertical reinforcing rectangular tube (78) is provided on the inner side of the angle steel connecting seat (71), and the reinforcing rectangular tube (78) is welded to two sides of the angle steel connecting seat (71) respectively.

7. The construction method of a split double-pulley double-wire rope tensioning hanging basket for an old building renovation project according to claim 3 is characterized by: The second steel wire rope (76) has a spacing of not less than 1 cm from the top of the floor of the first pulley mounting seat (62).

8. The construction method of a split double-pulley double-wire rope tensioning hanging basket for an old building renovation project according to claim 3 is characterized by: The first steel wire rope (61) and the second steel wire rope (76) are spaced at the nearest position by no less than 5 cm.

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