A hoisting structure for door slot embedded parts in narrow shafts

Abstract

The utility model relates to the technical field of hydraulic engineering construction, concretely relates to a hoisting structure for door groove embedded part in narrow vertical shaft. The utility model adopts two-stage lifting point design, including the first stage lifting point preburied in locking platform and the second stage lifting point fixed at the bottom of the chamber, and forms the hoisting mechanism of 4:1 force saving ratio through the trolley block set, movable pulley and steel wire rope transmission system, selects I20a and I16 type I-shaped steel as the lifting point base, is equipped with heavy -duty engineering pulley and the high -strength steel wire rope of diameter 16-18mm, adopts slow -speed electric hoist as power source. The utility model makes full use of the existing structure of vertical shaft, solves the problem of large embedded part hoisting in narrow space, has the advantages of reliable structure, safe operation, labor saving and high efficiency, and is especially suitable for door groove embedded part installation operation under the narrow vertical shaft environment of hydraulic engineering.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering construction technology, specifically to a hoisting structure for embedded parts in door slots inside narrow vertical shafts. Background Technology

[0002] In water conservancy projects, gate slot embedded parts are crucial structural components for gate installation. Traditional hoisting methods require reserving a large hoisting space in the gate hoisting room above the gate slot and installing fixed hoisting equipment. Especially in situations with limited vertical shaft space, conventional hoisting equipment is ineffective, posing significant challenges to construction. In water conservancy and hydropower projects, gate slot embedded parts are key pre-embedded components for gate installation, and their installation quality directly affects the gate's operational performance. Traditional hoisting methods typically require reserving large hoisting holes in the gate hoisting room above the gate slot and using large equipment such as truck cranes or tower cranes for hoisting. This method has many drawbacks: firstly, it requires a large hoisting operation space, which is difficult to implement in narrow vertical shafts; secondly, it requires interrupting the construction of the gate hoisting room, affecting the overall project progress; and thirdly, operating large equipment in a confined space is highly dangerous. Therefore, this method is not only time-consuming and costly, but also dangerous and inefficient in narrow vertical shafts. Therefore, there is an urgent need for specialized hoisting equipment suitable for narrow vertical shaft environments. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a system that is simple in structure, safe in operation, and specifically designed for hoisting embedded parts in narrow vertical shafts.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a hoisting structure for a door slot embedded part in a narrow vertical shaft, comprising at least the original vertical shaft structure and the door slot embedded part to be hoisted, and a hoisting execution mechanism, wherein the door slot embedded part is connected to the hoisting execution mechanism; the hoisting execution mechanism utilizes the original vertical shaft structure as a supporting foundation to complete the hoisting of the door slot embedded part.

[0005] The original vertical shaft structure includes, from top to bottom, a hoisting machine room, a gate chamber, a locking platform, and a cavern; the hoisting actuator includes a two-stage hoisting point system, a pulley system, and a transmission system located at different heights; the two-stage hoisting point system includes a primary hoisting point located at the height of the locking platform and a secondary hoisting point located at the bottom of the cavern; the primary hoisting point is located on the locking platform and consists of two parallel I-beams pre-embedded in the first-stage concrete of the locking platform; the bottom of the cavern has pre-embedded reinforcing bars in the first-stage concrete. Fixed I-beams are welded to the reinforcing bars, and the secondary lifting points are composed of fixed I-beams; the pulley system includes a first fixed pulley at the primary lifting point, a second fixed pulley at the secondary lifting point, and a movable pulley; the lower end of the movable pulley is connected to a door slot embedded part; the transmission system includes a winch located at the bottom of the tunnel and a wire rope assembly pulled by it; the wire rope assembly winds around the second fixed pulley, the first fixed pulley, and the movable pulley to form a labor-saving pulley structure, transmitting the traction force of the winch to the door slot embedded part.

[0006] The embedded I-beams are I20a type I-beams, which are kept horizontal and parallel to each other during embedding. The embedding depth of the embedded I-beams is configured to provide sufficient anchoring force, and their exposed length is configured to facilitate the installation and fixing of pulleys.

[0007] The fixed I-beam is an I16 type I-beam, which is connected to the reserved reinforcing bar by double-sided lap welding. The weld length is not less than 100mm and the weld leg size is not less than 6mm.

[0008] Both the first and second fixed pulleys are heavy-duty engineering pulleys with a rated load of 8 tons, a pulley diameter of not less than 200mm, and are equipped with ball bearings and anti-derailment devices.

[0009] The movable pulley is a double-wheel structure with a rated load of 10 tons. The fifth wire rope is connected to the connecting lug on the gate slot embedded part through a shackle. The fifth wire rope is a wire rope with a nominal tensile strength of not less than 1770MPa, and the wire rope has a structure of 6 strands and 37 wires with a fiber core. The specifications of the wire rope are configured to ensure that the safety factor of the entire hoisting system is not less than 5 under the maximum working load.

[0010] The wire rope assembly includes a first wire rope, a second wire rope, a third wire rope, and a fourth wire rope. One end of the first wire rope is fixed to the winch, and the other end is connected to one end of the second wire rope after passing through the second fixed pulley. The other end of the second wire rope extends upward and connects to the first fixed pulley via a primary lifting point. The labor-saving pulley assembly is composed of the third and fourth wire ropes. The third and fourth wire ropes are wound in parallel and independently between the first fixed pulley and the movable pulley. This hoisting structure utilizes the inherent structure of the shaft as a supporting foundation. By changing the direction of force through the first and second fixed pulleys in the hoisting actuator, the labor-saving effect is finally achieved through the movable pulley, thus completing the hoisting of the door slot embedded parts.

[0011] The described force-saving pulley system has a force-saving ratio of 4:1.

[0012] The wire rope assembly uses wire rope with a nominal tensile strength of not less than 1770MPa, and the wire rope has a structure of 6 strands and 37 wires with a fiber core; the wire rope specifications are configured to ensure that the safety factor of the entire hoisting system under the maximum working load is not less than 5.

[0013] The winch is a slow-speed electric winch with a rated pulling force of 5 tons and a lifting speed of 3-5 m / min. It is equipped with an electromagnetic brake, overload protection device and limit switch.

[0014] Beneficial effects

[0015] 1. This utility model has strong spatial adaptability: it makes full use of the existing structure of the vertical shaft to set up lifting points, perfectly adapting to the needs of working in narrow spaces;

[0016] 2. This utility model has high safety and reliability: by using pre-embedded I-beams as lifting points, the load-bearing capacity is reliable and the operation is highly safe;

[0017] 3. This utility model is labor-saving and efficient: it adopts a pulley block system, which greatly reduces the pulling force of the winch and improves the hoisting efficiency;

[0018] 4. This utility model is economical and practical: it eliminates the need for large lifting equipment, thus reducing construction costs;

[0019] 5. This utility model has minimal impact on the construction period: hoisting operations can be carried out simultaneously during the construction of the gate hoist room, without affecting the overall construction period;

[0020] 6. This utility model is easy to operate: the system structure is simple and easy for operators to master. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the system structure of this utility model;

[0022] Figure 2This is a schematic diagram illustrating the hoisting principle of this utility model.

[0023] In the diagram: 1. Gate opening and closing machine room; 2. Gate chamber; 3. Locking platform; 4. Embedded I-beam; 5. Primary lifting point; 6. First fixed pulley; 7. Third wire rope; 8. Cavern; 9. Moving pulley; 10. Reserved reinforcing steel; 11. Fixed I-beam; 12. Second fixed pulley; 13. Gate slot embedded part; 14. Second wire rope; 15. Secondary lifting point; 16. Winch; 17. First wire rope; 18. Fifth wire rope; 19. Fourth wire rope. Detailed Implementation

[0024] The present invention will now be further described with reference to the accompanying drawings.

[0025] like Figure 1-2 As shown, this utility model includes at least the original shaft structure and the door slot embedded part 13 to be hoisted, and also includes a hoisting execution mechanism. The door slot embedded part 13 is connected to the hoisting execution mechanism. The hoisting execution mechanism uses the original shaft structure as a supporting foundation to complete the hoisting of the door slot embedded part 13.

[0026] Furthermore, such as Figure 1As shown, the original shaft structure includes, from top to bottom, a hoisting machine room 1, a gate chamber 2, a locking platform 3, and a cavern 8. The hoisting machine room 1 is a workspace, and its construction can be carried out in parallel with the installation of internal equipment. The gate chamber 2 has a narrow shaft space inside. The great value of this utility model lies in the fact that, without the conditions for hoisting from the top of the hoisting machine room 1, the inherent narrow shaft structure of the gate chamber 2 is cleverly utilized to complete the hoisting of the gate slot embedded part 13. This makes the construction of the hoisting machine room 1 no longer restricted by the installation of the gate slot embedded part, and can be carried out independently or with optimized construction period, thus highlighting the efficiency and economy of this utility model. The hoisting execution mechanism includes a two-stage hoisting point system, a pulley system, and a transmission system set at different heights. The two-stage hoisting point system includes a primary hoisting point 5 set at the height of the locking platform 3 and a secondary hoisting point 15 set at the bottom of the cavern 8. The primary hoisting point 5 is located at the lock On the fixed platform 3, two parallel embedded I-beams 4 are pre-embedded in the primary concrete of the locking platform 3, providing sufficient bending stiffness to prevent single I-beams from torsion or lateral instability under huge loads; the bottom of the cavern 8 is pre-embedded with primary concrete reinforcement 10, and fixed I-beams 11 are fixedly welded to the pre-embedded reinforcement 10; the secondary lifting point 15 is composed of fixed I-beams 11; the pulley system includes a first fixed pulley 6 fixed to the primary lifting point 5, a second fixed pulley 12 fixed to the secondary lifting point 15, and a movable pulley 9; the lower end of the movable pulley 9 is connected to a door slot embedded part 13; the transmission system includes a winch 16 set at the bottom of the cavern 8 and a steel wire rope group pulled by it; the steel wire rope group winds around the second fixed pulley 12, the first fixed pulley 6 and the movable pulley 9 to form a labor-saving pulley group structure, which transmits the traction force of the winch 16 to the door slot embedded part 13.

[0027] Furthermore, the two parallel I-beams 4 serve as the top primary lifting points 5. During construction, the anchorage section embedded in the concrete should have sufficient depth to ensure adequate anchoring force during the hoisting of the gate slot embedded part 13, preventing it from being pulled out. The length of its exposed section should be moderate to facilitate the installation of the fixed pulley 6 and the winding of the wire rope 7, while avoiding unnecessary stability risks due to excessive exposed length. During pre-embedding, precise adjustment using instruments is required to ensure that the two I-beams 4 are horizontal and parallel to each other, ensuring uniform load distribution, flatness and consistency of the overall structure, and avoiding stress concentration and safety hazards caused by tilting or misalignment. The pre-embedded I-beams 4 are I20a type I-beams, which are sturdy and durable, with rust-proof surface treatment. During pre-embedding, the pre-embedded I-beams 4 are kept horizontal and parallel to each other.

[0028] Furthermore, the I-beam 11 fixed to the reserved reinforcing bar 10 serves as the bottom secondary lifting point 15. The I-beam 11 and the reserved reinforcing bar 10 are fixed together by double-sided lap welding. The welding operation should follow standardized welding procedures to ensure sufficient weld length and penetration depth. The weld leg size should meet the design load-bearing requirements, thereby ensuring that the connection node of the bottom lifting point 15 has extremely high structural strength and reliability, and can safely withstand all loads from the winch 16 and pulley block. The fixed I-beam 11 welded to the reserved reinforcing bar 10 is an I16 type I-beam. The weld length is not less than 100mm, ensuring structural stability and strength. The weld leg size is not less than 6mm. This welding specification ensures that the bottom lifting point 15 has extremely high structural stability and connection strength. The weld quality effectively prevents cracks or fractures due to excessive stress during lifting, thereby greatly improving the safety of the entire lifting system.

[0029] Furthermore, such as Figure 2 As shown, both the first fixed pulley 6 and the second fixed pulley 12 are heavy-duty engineering pulleys with a rated load of 8 tons and a diameter of not less than 200mm. The pulleys are equipped with high-precision ball bearings to reduce friction, improve transmission efficiency, and extend service life. Furthermore, each pulley is equipped with a robust and durable anti-derailment device made of high-strength alloy steel. Its structure effectively restrains the wire rope from running within the pulley groove, fundamentally preventing the risk of rope slippage or even detachment under complex stress or unexpected conditions. This well-known safety measure is crucial in the narrow, deep well working environment described in this method, greatly ensuring operational safety throughout the lifting process and effectively preventing accidental rope detachment.

[0030] Furthermore, such as Figure 2 As shown, the movable pulley 9 is a double-wheel structure with a rated load of 10 tons. It connects the fifth wire rope 18 to the connecting lug on the portal frame 13 via a shackle, ensuring stability and safety even under heavy loads. The locking function of the shackle effectively prevents accidental opening due to shaking or rotation during hoisting, further enhancing the safety of the entire hoisting system and facilitating quick installation and disassembly by operators. The connecting lug of the portal frame 13 is made of high-quality steel and undergoes special heat treatment, possessing excellent tensile strength and durability, ensuring long-term use without deformation or damage. The fifth wire rope 18 uses a wire rope with a nominal tensile strength of not less than 1770 MPa, and the wire rope has a 6-strand, 37-wire structure with a fiber core. The wire rope specifications are configured to ensure a safety factor of not less than 5 for the entire hoisting system under maximum working load.

[0031] The wire rope assembly includes a first wire rope 17, a second wire rope 14, a third wire rope 7, and a fourth wire rope 19. One end of the first wire rope 17 is fixed to the winch 16, and the other end passes through the second fixed pulley 12 and connects to one end of the second wire rope 14. The other end of the second wire rope 14 extends upward and connects to the first fixed pulley 6 via a primary lifting point 5. The labor-saving pulley assembly is composed of the third wire rope 7 and the fourth wire rope 19. The third wire rope 7 and the fourth wire rope 19 are wound in parallel and independently between the first fixed pulley 6 and the movable pulley 9. This hoisting structure utilizes the inherent structure of the shaft as a supporting foundation. By changing the direction of force through the first fixed pulley 6 and the second fixed pulley 12 in the hoisting actuator, the labor-saving effect is finally achieved through the movable pulley 9, thus completing the hoisting of the door slot embedded part 13.

[0032] The winch 16 is a slow-speed electric winch with a rated pulling force of 5 tons and a lifting speed of 3-5 m / min. It is equipped with an electromagnetic brake, an overload protection device, and a limit switch.

[0033] Furthermore, such as Figure 2 As shown, the force-saving pulley system structure has a force-saving ratio of 4:1.

[0034] Furthermore, such as Figure 2 As shown, the first wire rope 17, the second wire rope 14, the third wire rope 7, and the fourth wire rope 19 are all made of wire rope with a nominal tensile strength of not less than 1770 MPa. The wire rope has a structure of 6 strands and 37 wires with a fiber core. This type of wire rope has extremely high strength and wear resistance and can withstand extremely high tensile forces without breaking. The specifications of the wire rope are configured to ensure that the safety factor of the entire hoisting system under the maximum working load is not less than 5. The safety factor is the ratio of the minimum breaking tensile force of the wire rope to the maximum calculated load of the door slot embedded part 13, ensuring reliable support and protection under various working conditions and guaranteeing safe use even in extreme cases.

[0035] Furthermore, such as Figure 1 and Figure 2 As shown, the winch 16 is a slow-speed electric winch with a rated pulling force of 5 tons and a lifting speed of 3-5 m / min. It is equipped with an electromagnetic brake, overload protection device, and limit switches. The equipment features a high-efficiency electromagnetic brake to ensure rapid stopping in emergencies, and an overload protection device that automatically cuts off the power supply when the load exceeds the rated value to prevent motor damage. Furthermore, a sensitive limit switch is installed, which automatically stops the operation when the hook reaches the preset highest or lowest position to avoid overtravel accidents. The entire winch has a compact structure, is easy to operate, and is suitable for various industrial applications requiring precise control of lifting speed and load.

[0036] Furthermore, unlike the above embodiments, a construction method for a hoisting structure for a door slot embedded part in a narrow vertical shaft includes the following steps: Step 1, when pouring the first-stage concrete of the locking platform 3, two I-beams 4 are pre-embedded at the designed spacing to form a primary hoisting point 5, ensuring that the pre-embedded position is accurate and horizontal; Step 2, at the bottom of the chamber 8, I-beams 11 are welded on both sides to the reserved reinforcing bars 10 to form a secondary hoisting point 15; Step 3, a first fixed pulley 6 is installed at the primary hoisting point 5, and a second fixed pulley 12 is installed at the secondary hoisting point 15; Step 4, a wire rope transmission system is configured: one end of the first wire rope 17 is fixed to the winch 16, and the other end passes around the second fixed pulley 12 and is connected to the first fixed pulley 16. One end of the second wire rope 14 is connected; the other end of the second wire rope 14 extends upward, and its load is finally applied to the first fixed pulley 6, thereby transmitting the power of the winch 16 to the first fixed pulley 6 at the top of the shaft; then, the third wire rope 7 and the fourth wire rope 19 are used to connect the first fixed pulley 6 and the movable pulley 9 to form a force-saving pulley group, which converts the tension from the second wire rope 14 into the force to lift the movable pulley 9 and the door slot embedded part 13; in step five, the door slot embedded part 13 is connected to the movable pulley 9 through the shackle, and the reliability of each connection part is checked; in step six, the winch 16 is started, and the movable pulley 9 is driven by the wire rope transmission system to lift the door slot embedded part 13 to the installation position.

[0037] In step one, a special positioning frame is used to ensure the spacing and parallelism when pre-embedding the I-beams 4, and the position is corrected in time after the concrete is poured.

[0038] During the hoisting process in step six, the hoisting process is kept stable and controllable by controlling the lifting speed of the winch 16, with the lifting speed maintained at 3 to 5 m / min.

[0039] During the hoisting process in step six, a dedicated person is assigned to monitor the operation of each pulley, the direction of the wire rope, and the condition of the hoisted object. If any abnormality is found, the machine is immediately stopped for inspection.

[0040] Where there is no conflict, those skilled in the art can combine the relevant technical features in the above examples according to the actual situation to achieve the corresponding technical effects. Specific details of the various combinations will not be elaborated here.

[0041] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0042] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0043] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent variations, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the present invention.

Claims

1. A hoisting structure for a door slot embedded part in a narrow vertical shaft, comprising at least the original vertical shaft structure and the door slot embedded part (13) to be hoisted, characterized in that: It also includes a hoisting actuator, on which the door slot embedded part (13) is connected; the hoisting actuator uses the original shaft structure as a support foundation to complete the hoisting of the door slot embedded part (13).

2. The hoisting structure for the embedded part of the door slot in a narrow vertical shaft according to claim 1, characterized in that: The original vertical shaft structure includes, from top to bottom, a hoisting machine room (1), a gate chamber (2), a locking platform (3), and a cavern (8); the hoisting execution mechanism includes a two-stage hoisting point system, a pulley system, and a transmission system set at different heights; the two-stage hoisting point system includes a primary hoisting point (5) set at the height of the locking platform (3) and a secondary hoisting point (15) set at the bottom of the cavern (8); the primary hoisting point (5) is located on the locking platform (3) and consists of two pre-embedded I-beams (4) embedded side by side in the first-stage concrete of the locking platform (3); the bottom of the cavern (8) is pre-set with a first-stage concrete reserved steel bar (10), and the reserved steel bar (10) is fixed on The secondary lifting point (15) is composed of fixed I-beams (11) welded on; the pulley system includes a first fixed pulley (6) set at the primary lifting point (5), a second fixed pulley (12) set at the secondary lifting point (15) and a movable pulley (9); the lower end of the movable pulley (9) is connected to a door slot embedded part (13); the transmission system includes a winch (16) set at the bottom of the cavern (8) and a steel wire rope group pulled by it; the steel wire rope group is wound around the second fixed pulley (12), the first fixed pulley (6) and the movable pulley (9) to form a labor-saving pulley group structure, which transmits the traction force of the winch (16) to the door slot embedded part (13).

3. The hoisting structure for embedded parts in door slots within narrow vertical shafts according to claim 2, characterized in that: The embedded I-beam (4) is an I20a type I-beam. It is kept horizontal and parallel to each other during the embedding process. The embedding depth of the embedded I-beam (4) is configured to provide sufficient anchoring force, and its exposed length is configured to facilitate the installation and fixing of the pulley.

4. The hoisting structure for embedded parts in door slots within narrow vertical shafts according to claim 2, characterized in that: The fixed I-beam (11) is an I16 type I-beam, which is connected to the reserved reinforcing bar (10) by double-sided lap welding. The weld length is not less than 100mm and the weld leg size is not less than 6mm.

5. A hoisting structure for embedded parts in door slots within narrow vertical shafts according to claim 2, characterized in that: The first fixed pulley (6) and the second fixed pulley (12) are both heavy-duty engineering pulleys with a rated load of 8 tons, and the pulley diameter is not less than 200mm. They are equipped with ball bearings and anti-rope slippage devices.

6. A hoisting structure for embedded parts in door slots within narrow vertical shafts according to claim 2, characterized in that: The movable pulley (9) is a double-wheel structure with a rated load of 10 tons. The fifth wire rope (18) is connected to the connecting lug on the door slot embedded part (13) by a shackle. The fifth wire rope (18) is a wire rope with a nominal tensile strength of not less than 1770MPa, and the wire rope has a structure of 6 strands and 37 wires with a fiber core. The specifications of the wire rope are configured to ensure that the safety factor of the entire hoisting system under the maximum working load is not less than 5.

7. A hoisting structure for embedded parts in door slots within narrow vertical shafts according to claim 2, characterized in that: The wire rope assembly includes a first wire rope (17), a second wire rope (14), a third wire rope (7), and a fourth wire rope (19). One end of the first wire rope (17) is fixed to the winch (16), and the other end is connected to one end of the second wire rope (14) after passing through the second fixed pulley (12). The other end of the second wire rope (14) extends upward and is connected to the first fixed pulley (6) through the first-level lifting point (5). The labor-saving pulley assembly is composed of the third wire rope (7) and the fourth wire rope (19). The third wire rope (7) and the fourth wire rope (19) are wound in parallel and independently between the first fixed pulley (6) and the movable pulley (9). This hoisting structure uses the inherent structure of the shaft as the supporting foundation. The direction of force is changed by the first fixed pulley (6) and the second fixed pulley (12) in the hoisting actuator. Finally, the labor-saving effect is achieved through the movable pulley (9), and the hoisting of the door slot embedded part (13) is completed.

8. A hoisting structure for embedded parts in door slots within narrow vertical shafts according to claim 7, characterized in that: The described force-saving pulley system has a force-saving ratio of 4:

1.

9. A hoisting structure for embedded parts in door slots within narrow vertical shafts according to claim 7, characterized in that: The wire rope assembly uses wire rope with a nominal tensile strength of not less than 1770MPa, and the wire rope has a structure of 6 strands and 37 wires with a fiber core; the wire rope specifications are configured to ensure that the safety factor of the entire hoisting system under the maximum working load is not less than 5.

10. A hoisting structure for embedded parts in door slots within narrow vertical shafts according to claim 2, characterized in that: The winch (16) is a slow-speed electric winch with a rated pulling force of 5 tons and a lifting speed of 3-5 m / min. It is equipped with an electromagnetic brake, an overload protection device and a limit switch.

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