A fire-fighting ventilation pipe hoisting and clamping device for construction engineering

Abstract

The present application relates to the technical field of fire ventilation pipe hoisting, and relates to a fire ventilation pipe hoisting and clamping device for building engineering, which comprises a main hanger, a gravity center adjusting mechanism, a first hydraulic cylinder body, a bearing frame, a transverse and longitudinal displacement driving mechanism, a mounting seat, an L-shaped support plate and a clamping plate. The bearing frame is elastically connected to the main hanger, and the bottom mounting seat adjusts the spacing through the displacement driving mechanism to adapt to the specifications. The first hydraulic cylinder body is communicated with the second hydraulic cylinder body on the mounting seat through a flexible pipe. The application drives the hydraulic linkage mechanism by using the gravity of the ventilation pipe, so that the clamping plate realizes self-adaptive lateral pressing and clamping of the pipe wall. The gravity center adjusting mechanism cooperates with the inclination sensor to dynamically adjust the position of the lifting ring, so as to realize automatic correction of the hoisting posture. The application can ensure that the ventilation pipe is uniformly stressed and horizontally stable, effectively prevent the deformation of the thin-walled ventilation pipe, and significantly improve the construction safety.

Description

Technical Field

[0001] This invention relates to the field of fire ventilation duct hoisting technology, and in particular to a hoisting and clamping device for fire ventilation ducts used in building engineering. Background Technology

[0002] In the construction of fire protection systems for modern high-rise buildings, large commercial complexes, and industrial plants, the installation of ventilation systems within vertical shafts is a crucial step in ensuring the building's smoke control and exhaust functions. Due to the narrow space and large vertical height of the shafts, rectangular fire-fighting ducts are typically installed using a stacking process. In this process, lifting equipment connects to the top of the duct section to be installed using a lifting device, vertically lifts it, and sends it to the predetermined position in the shaft, ensuring that its bottom flange is precisely aligned and tightened with the top flange of the already fixed duct section below.

[0003] However, in actual vertical hoisting operations, existing hoisting methods and clamping equipment have significant technical limitations. Currently, construction sites commonly use bolts directly through the bolt holes on the flange at the top of the duct to be installed for fixing and hoisting, or use steel cables to wrap around the flange holes for binding. Since fire-fighting ducts are mostly made of thin galvanized steel sheets, their wall thickness is usually between 0.5mm and 1.2mm, resulting in limited local tensile strength. When hoisting long pipe sections, all dynamic and static loads are highly concentrated in the area around the bolt holes at the top. This extremely high local stress easily leads to irreversible plastic deformation of the thin-walled holes, stretching the originally standard round holes into elliptical holes. This damage is insidious; when the pipe section is installed and serves as a base for the stacking of the next pipe section, the damaged and deformed reserved holes will prevent the bolts of the upper and lower flanges from being smoothly inserted, forcing construction workers to enlarge the holes at height or forcibly pry them open, severely compromising the standardization of construction and reducing the overall structural strength of the pipeline.

[0004] Meanwhile, verticality control during vertical hoisting is a recognized challenge in the industry. During stacking, the hoisting point is located at the very top of the pipe section, while the mating surface is several meters below at the bottom, forming a typical long cantilever structure. Due to factors such as duct manufacturing tolerances, uneven distribution of internal reinforcing ribs, and minor errors in sling length, the geometric center of the duct often does not coincide with its physical center of gravity. In the suspended state, the minimal eccentricity at the top is amplified by the lever arm of the pipe length, resulting in a significant angular tilt at the bottom flange. In the narrow and obstructed shaft environment, the bottom flange often contacts the lower pipe at an angle, preventing the two flange faces from achieving a horizontal parallel fit. Workers must manually resist the swaying force within the confined shaft space, attempting to horizontally cut the bottom flange into the top flange of the installed pipe section. This method is not only extremely inefficient but also highly prone to causing thin-walled flange edges to curl or gaskets to misalign due to collisions, posing serious safety risks.

[0005] In summary, for the installation of rectangular ducts in vertical stacking scenarios, there is an urgent need for a specialized device that can effectively protect the reserved holes and has the ability to finely adjust the verticality. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and to propose a hoisting and clamping device for fire ventilation ducts in building engineering.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A hoisting and clamping device for fire ventilation ducts in building engineering includes a main hanger. A lifting ring and a center-of-gravity adjustment mechanism for adjusting the position of the lifting ring are provided above the main hanger. A first hydraulic cylinder is installed at the bottom of the main hanger. A first piston is vertically slidably connected inside the first hydraulic cylinder. The bottom end face of the first piston and the inner side of the first hydraulic cylinder form a first hydraulic cavity, which is filled with hydraulic medium. A connecting rod is fixedly connected to the bottom end of the first piston. The bottom end of the connecting rod extends to the outside of the first hydraulic cylinder and is fixedly connected to a support frame. Multiple sliding rods are fixedly connected to the top surface of the support frame. The sliding rods slide vertically through the main hanger. A first return spring connects the support frame and the main hanger. Four rectangularly distributed mounting brackets are provided on the support frame. The mounting base is provided with a lateral displacement driving mechanism on the support frame to drive two of the mounting bases to move laterally closer or further apart, and a longitudinal displacement driving mechanism on the support frame to drive the other two mounting bases to move longitudinally closer or further apart. The bottom end of the mounting base is provided with an L-shaped support plate and a mounting plate. A second hydraulic cylinder is mounted on the mounting plate. A second piston is horizontally slidably connected inside the second hydraulic cylinder. An abutment rod is fixedly connected to one end face of the second piston. One end of the abutment rod extends to the outside of the second hydraulic cylinder and is fixedly connected to a clamping plate. The clamping plate is located below the L-shaped support plate. The end face of the second piston away from the abutment rod forms a second hydraulic cavity with the inside of the second hydraulic cylinder. The second hydraulic cavity is connected to the first hydraulic cavity through a flexible hydraulic pipe.

[0008] Preferably, the lateral displacement driving mechanism includes a first bidirectional screw that is laterally rotatably disposed at the bottom of the support frame, a lateral drive motor that drives the first bidirectional screw to rotate is installed at the bottom of the support frame, the two mounting seats are respectively threaded to the two ends of the first bidirectional screw, the support frame is provided with two lateral sliding grooves, and the mounting seats are slidably connected to the lateral sliding grooves.

[0009] Preferably, the longitudinal displacement driving mechanism includes a second bidirectional screw that is longitudinally rotatably disposed at the bottom of the support frame. A longitudinal drive motor for driving the second bidirectional screw to rotate is installed at the bottom of the support frame. The two mounting seats are respectively threaded to both ends of the second bidirectional screw. Two longitudinal sliding grooves are provided on the support frame, and the mounting seats are slidably connected to the longitudinal sliding grooves.

[0010] Preferably, the center of gravity adjustment mechanism includes a lead screw that is horizontally rotatably mounted on the main hanger, a lead screw motor that drives the lead screw to rotate is mounted on the main hanger, an adjustment seat is threadedly connected to the lead screw, the adjustment seat is slidably connected to the main hanger, and the lifting ring is fixedly connected to the top of the adjustment seat.

[0011] Preferably, a tilt sensor is installed on the main hanger, and the detection axis of the tilt sensor is parallel to the lead screw.

[0012] Preferably, the end face of the first piston away from the connecting rod forms a reset chamber with the inner side of the first hydraulic cylinder, and a vent hole communicating with the reset chamber is provided on one side of the first hydraulic cylinder.

[0013] Preferably, a second return spring is sleeved on the outer periphery of the abutment rod, and the two ends of the second return spring are respectively connected to the outer end face of the second hydraulic cylinder and the clamping plate.

[0014] Preferably, the L-shaped support plate is provided with an elastic bearing pad, the clamping working surface of the clamping plate is embedded with an elastic clamping pad, and the surface of the elastic clamping pad is provided with a grid-like anti-slip texture.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention uses L-shaped support plates to lift the lower surface of the flange, transforming the load from concentrated force on pre-drilled holes to overall force on the flange surface, thus preventing hole deformation. A center-of-gravity adjustment mechanism changes the horizontal position of the lifting points, utilizing the self-correcting principle of gravity to control the verticality of the long cantilever. Lateral and longitudinal displacement drive mechanisms adjust the spacing of the L-shaped support plates, achieving sequential actions of insertion, lifting, and separation, with posture adjustments ensuring precise alignment. The interconnected design of the first and second hydraulic cylinders converts the weight of the ventilation duct into hydraulic pressure, driving the clamping plates to clamp horizontally, achieving adaptive matching between clamping force and weight. A first return spring, in conjunction with the displacement drive mechanism, allows the support plates to disperse and be pulled out from narrow gaps, solving the problem of device separation. This application ensures uniform stress on the ventilation duct and maintains horizontal stability, effectively preventing deformation of thin-walled ventilation ducts and significantly improving construction safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 ; Figure 4 This is a cross-sectional view of the present invention; Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 for Figure 4 Enlarged view of point B in the middle; Figure 7 This is a schematic diagram of the initial state of the ventilation duct of the present invention; Figure 8 This is a schematic diagram showing the hoisting and clamping state of the ventilation duct according to the present invention; Figure 9 This is a schematic diagram showing the unloading state of the ventilation duct according to the present invention.

[0017] In the diagram: 1. Main hanger; 2. Lifting ring; 3. First hydraulic cylinder; 301. First hydraulic chamber; 302. Reset chamber; 303. Vent hole; 4. First piston; 5. Connecting rod; 6. Bearing frame; 601. Transverse slide groove; 602. Longitudinal slide groove; 7. Slide rod; 8. First reset spring; 9. Second hydraulic cylinder; 901. Second hydraulic chamber; 10. Mounting seat; 11. L-shaped support plate; 12. Mounting plate; 13. Second piston; 14. Abutment rod; 15. Clamping plate; 16. Flexible hydraulic pipe; 17. First bidirectional screw; 18. Transverse drive motor; 19. Second bidirectional screw; 20. Longitudinal drive motor; 21. Lead screw; 22. Lead screw motor; 23. Adjusting seat; 24. Tilt sensor; 25. Second reset spring; 26. Ventilation duct. Detailed Implementation

[0018] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0019] like Figure 1-6As shown, this embodiment of the invention provides a hoisting and clamping device for fire ventilation ducts in building engineering, including a main hanger 1. A lifting ring 2 and a center of gravity adjustment mechanism for adjusting the position of the lifting ring 2 are provided above the main hanger 1. The lifting ring 2 is connected to the hook of an external lifting device to suspend the entire device. A first hydraulic cylinder 3 is installed at the bottom of the main hanger 1. A first piston 4 is vertically slidably connected inside the first hydraulic cylinder 3. A sealing ring is provided on the outer periphery of the first piston 4 to form a fluid seal between it and the inner wall of the first hydraulic cylinder 3. The bottom end face of the first piston 4 and the inner side of the first hydraulic cylinder 3 form a first hydraulic cavity 301. The first hydraulic cavity 301 is filled with a hydraulic medium, such as hydraulic oil. A connecting rod 5 is fixedly connected to the bottom end of the first piston 4. The bottom end of the connecting rod 5 extends to the outside of the first hydraulic cylinder body 3 and is fixedly connected to a support frame 6. Multiple sliding rods 7 are fixedly connected to the top surface of the support frame 6. The sliding rods 7 slide vertically through the main hanger 1. A first return spring 8 is connected between the support frame 6 and the main hanger 1. Four mounting seats 10 are provided on the support frame 6 in a rectangular arrangement. The support frame 6 is provided with a lateral displacement drive mechanism that drives two of the mounting seats 10 to move laterally closer or further apart. The support frame 6 is also provided with a longitudinal displacement drive mechanism that drives the other two mounting seats 10 to move longitudinally closer or further apart. An L-shaped support plate 11 and a mounting plate 12 are provided at the bottom end of the mounting seat 10. The L-shaped support plate 11 includes a horizontal part and a vertical part. The horizontal part supports the flange at the top of the ventilation duct 26. A second hydraulic cylinder 9 is mounted on the mounting plate 12. A second piston 13 is horizontally slidably connected inside the second hydraulic cylinder 9. An abutment rod 14 is fixedly connected to one end face of the second piston 13. One end of the abutment rod 14 extends to the outside of the second hydraulic cylinder 9 and is fixedly connected to a clamping plate 15. The clamping plate 15 is located below the L-shaped support plate 11. The end face of the second piston 13 away from the abutment rod 14 forms a second hydraulic cavity 901 with the inside of the second hydraulic cylinder 9. The second hydraulic cavity 901 is connected to the first hydraulic cavity 301 through a flexible hydraulic pipe 16. The flexible hydraulic pipe 16 is a rubber high-pressure oil pipe reinforced with braided steel wire, and its two ends are connected to the first hydraulic cylinder 3 and the second hydraulic cylinder 9, respectively.

[0020] Specifically, the lateral displacement drive mechanism includes a first bidirectional screw 17 laterally rotatable at the bottom of the support frame 6. A lateral drive motor 18, which drives the first bidirectional screw 17 to rotate, is mounted at the bottom of the support frame 6. Two mounting seats 10 are threadedly connected to both ends of the first bidirectional screw 17. Two lateral sliding grooves 601 are provided on the support frame 6, and the mounting seats 10 are slidably connected to the lateral sliding grooves 601. The two ends of the first bidirectional screw 17 are respectively machined with left-hand threaded sections and right-hand threaded sections with opposite directions of rotation. Among the four mounting seats 10, two opposite mounting seats 10 are respectively provided with threaded holes that mate with the first bidirectional screw 17 and are threadedly connected to both ends of the first bidirectional screw 17. When the lateral drive motor 18 rotates, it drives the first bidirectional screw 17 to rotate synchronously. Since the two ends of the threads rotate in opposite directions, the two mounting seats 10 will synchronously move closer to each other or further away from each other within the lateral sliding grooves 601.

[0021] Specifically, the longitudinal displacement drive mechanism includes a second bidirectional screw 19 longitudinally rotatably mounted at the bottom of the support frame 6. A longitudinal drive motor 20 is installed at the bottom of the support frame 6 to drive the second bidirectional screw 19 to rotate. Two mounting seats 10 are threadedly connected to both ends of the second bidirectional screw 19, respectively. Two longitudinal sliding grooves 602 are provided on the support frame 6, and the mounting seats 10 are slidably connected to the longitudinal sliding grooves 602. The axis of the second bidirectional screw 19 is perpendicular to the axis of the first bidirectional screw 17 in the horizontal plane. The other two mounting seats 10 are respectively connected to both ends of the second bidirectional screw 19 by threads with opposite directions of rotation. By driving the second bidirectional screw 19 to rotate through the longitudinal drive motor 20, the corresponding two mounting seats 10 can be adjusted back and forth along the longitudinal sliding grooves 602.

[0022] Specifically, the center of gravity adjustment mechanism includes a lead screw 21 that is horizontally rotatably mounted on the main hanger 1. A lead screw motor 22 that drives the lead screw 21 to rotate is installed on the main hanger 1. An adjustment seat 23 is threadedly connected to the lead screw 21. The adjustment seat 23 is slidably connected to the main hanger 1. A lifting ring 2 is fixedly connected to the top of the adjustment seat 23.

[0023] Specifically, an inclination sensor 24 is installed on the main hanger 1, and the detection axis of the inclination sensor 24 is parallel to the lead screw 21.

[0024] Specifically, the end face of the first piston 4 away from the connecting rod 5 forms a reset chamber 302 with the inner side of the first hydraulic cylinder 3. A vent hole 303 communicating with the reset chamber 302 is provided on one side of the first hydraulic cylinder 3. In order to prevent air resistance from occurring when the first piston 4 moves, a vent hole 303 communicating with the reset chamber 302 is provided at the upper end of the side wall of the first hydraulic cylinder 3, so that the interior of the reset chamber 302 is always in communication with the atmosphere to maintain pressure balance.

[0025] Specifically, a second return spring 25 is sleeved around the outer periphery of the abutment rod 14. The two ends of the second return spring 25 are connected to the outer end face of the second hydraulic cylinder 9 and the clamping plate 15, respectively. In order to ensure that the clamping mechanism can automatically reset under no-load conditions, a second return spring 25 is sleeved around the outer periphery of the abutment rod 14. The second return spring 25 is in a pre-compressed state, and always provides a pulling force to the clamping plate 15 in the outward direction, that is, away from the center of the ventilation duct 26.

[0026] Specifically, the L-shaped support plate 11 is provided with an elastic bearing pad, which is made of high-molecular rubber material to increase friction and protect the flange surface. The clamping working surface of the clamping plate 15 is embedded with an elastic clamping pad, and the surface of the elastic clamping pad is provided with a grid-like anti-slip texture.

[0027] The operating principle and process of the fire ventilation duct hoisting and clamping equipment used in this building project are as follows.

[0028] During the preparation phase, the construction personnel first adjust the positions of the four L-shaped support plates 11 according to the cross-sectional dimensions of the ventilation duct 26 to be hoisted, using the horizontal drive motor 18 and the vertical drive motor 20. This ensures that the L-shaped support plates 11 are positioned above the ventilation duct 26 and around the outer periphery of the ventilation duct 26 flange. The hoisting equipment is then lowered, and the four L-shaped support plates 11 are moved to below the top flange of the ventilation duct 26. The horizontal drive motor 18 is then activated, rotating the first bidirectional screw 17, causing the two connected mounting seats 10 to move along the horizontal slide groove 601 until the distance between the two L-shaped support plates 11 is less than the lateral length of the ventilation duct 26 flange. Subsequently, the vertical drive motor 20 is activated, rotating the second bidirectional screw 19, adjusting the positions of the other two mounting seats 10 until the distance between the two L-shaped support plates 11 is less than the longitudinal width of the ventilation duct 26 flange.

[0029] like Figure 7 As shown, after the positions of the four mounting seats 10 are adjusted, the four L-shaped support plates 11 hook onto the four sides of the flange at the top of the ventilation duct 26. At this time, as the external lifting equipment lifts the lifting ring 2 upward, the entire weight of the ventilation duct 26 is transferred to the four L-shaped support plates 11. This weight load is transmitted to the support frame 6 through the mounting seats 10. Under the downward pull of the gravity of the ventilation duct 26, the support frame 6 overcomes the upward supporting force of the first return spring 8 and displaces downward relative to the main hanger 1. Since the first hydraulic cylinder 3 is fixed on the main hanger 1, and the first piston 4 is connected to the support frame 6 through the connecting rod 5, the downward movement of the support frame 6 causes the connecting rod 5 and the first piston 4 to move downward synchronously within the first hydraulic cylinder 3.

[0030] As the first piston 4 moves downward, the volume of the first hydraulic chamber 301 is compressed, and the pressure of the internal hydraulic medium rapidly increases. The high-pressure hydraulic medium is forced into the second hydraulic chamber 901 via the flexible hydraulic pipe 16. The hydraulic medium entering the second hydraulic chamber 901 pushes the second piston 13 towards the center of the ventilation duct 26. Figure 8 As shown, the second piston 13 overcomes the resistance of the second return spring 25 and drives the clamping plate 15 to extend horizontally inward through the abutment rod 14. The elastic clamping pads on the surface of the clamping plate 15 finally press tightly against the side wall of the ventilation duct 26. Since the pressure transmission between the first hydraulic chamber 301 and the second hydraulic chamber 901 is instantaneous and proportional to the load, the greater the weight of the ventilation duct 26, the stronger the downward tendency of the first piston 4, and the higher the hydraulic pressure generated, which in turn increases the lateral clamping force of the clamping plate 15 on the wall of the ventilation duct 26. This adaptive hydraulic linkage mechanism ensures that during the hoisting process, the ventilation duct 26 is not only supported by the L-shaped support plate 11 at the bottom, but also firmly clamped by the clamping plates 15 around it, preventing the ventilation duct 26 from shaking or falling off during the lifting process.

[0031] During hoisting, if there are accessories or irregular shapes inside the ventilation duct 26 causing the overall center of gravity to deviate from the geometric center, the main hanger 1 will tilt due to uneven force. At this time, the tilt sensor 24 fixed to the main hanger 1 will detect the tilt angle and direction in real time, driving the lead screw motor 22 to rotate forward or in the opposite direction. The lead screw motor 22 drives the lead screw 21 to rotate, thereby driving the adjusting seat 23 and the lifting ring 2 to move along the axis of the lead screw 21. By changing the horizontal position of the lifting ring 2 relative to the center of gravity of the ventilation duct 26, a reverse adjusting torque can be generated to counteract the tilting torque caused by the center of gravity shift. This dynamic adjustment process can automatically correct the posture of the main hanger 1, ensuring that the support frame 6 and the ventilation duct 26 remain in a horizontal and vertical state at all times.

[0032] After the ventilation duct 26 is hoisted to the predetermined position and installed and secured, the external lifting equipment continues to descend, so that the L-shaped support plate 11 no longer bears the weight of the ventilation duct 26. Figure 9As shown, at this point, the support frame 6 loses its downward tension. Under the elastic restoring force of the four first return springs 8, the support frame 6 moves upward to reset, causing the first piston 4 to slide upward within the first hydraulic cylinder 3. The volume of the first hydraulic chamber 301 increases, and the internal pressure drops sharply. At this time, the second return spring 25 releases its elastic potential energy, pulling the clamping plate 15 and the abutment rod 14 to retract outward, pressing the hydraulic medium in the second hydraulic chamber 901 back into the first hydraulic chamber 301. The clamping plate 15 separates from the wall of the ventilation duct 26, achieving automatic unloading. Subsequently, by adjusting the horizontal drive motor 18 and the longitudinal drive motor 20, the mounting base 10 is moved outward a certain distance, allowing the hoisting equipment to be removed from the flange of the ventilation duct 26, completing one complete hoisting cycle.

[0033] This invention utilizes an adaptive hydraulic linkage mechanism consisting of a first hydraulic cylinder 3, a first piston 4, and a second hydraulic cylinder 9. The mechanism uses the gravity of the ventilation duct 26 as a power source to drive the clamping plate 15 for horizontal clamping. When the ventilation duct 26 is placed on the L-shaped support plate 11, gravity is converted into hydraulic energy and transmitted to the lateral clamping plate 15, causing the clamping plate 15 to automatically abut against the wall of the ventilation duct 26. This structure avoids stress concentration at the flange holes caused by traditional bolt fixing methods, and distributes the load through surface contact clamping, effectively preventing deformation of the thin-walled ventilation duct 26 during hoisting.

[0034] This invention achieves dynamic balance adjustment during hoisting through the cooperation of a center-of-gravity adjustment mechanism and an angle sensor 24. The lead screw motor 22 drives the lifting ring 2 to perform position compensation based on the real-time tilt state of the main hanger 1, which can counteract the tilting torque caused by the uneven center of gravity of the ventilation duct 26, ensuring that the ventilation duct 26 remains vertical during lifting and lowering. This reduces the need for manual leveling and improves construction efficiency and safety.

[0035] The present invention, through the combination of lateral and longitudinal displacement driving mechanisms, enables the four mounting bases 10 to be adjusted in a two-dimensional plane on the bottom surface of the support frame 6, which can be adapted to rectangular ventilation ducts 26 of different specifications and sizes, thus enhancing the versatility of the equipment.

[0036] This invention incorporates elastic gaskets with anti-slip textures at the contact points and utilizes a first return spring 8 and a second return spring 25 to achieve automatic reset of the mechanism. The flexible transmission characteristics of the hydraulic system can buffer the impact force at the moment of hoisting start-up. Combined with the automatic center of gravity compensation function, this ensures the safety of hoisting the thin-walled ventilation duct 26 in complex construction environments and protects the structural integrity of the ventilation duct 26 flange.

[0037] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0038] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A hoisting and clamping device for fire ventilation ducts in building engineering, characterized in that, The system includes a main hanger (1), with a lifting ring (2) and a center-of-gravity adjustment mechanism for adjusting the position of the lifting ring (2) on the top of the main hanger (1). A first hydraulic cylinder (3) is installed at the bottom of the main hanger (1), and a first piston (4) is vertically slidably connected inside the first hydraulic cylinder (3). The bottom end face of the first piston (4) and the inner side of the first hydraulic cylinder (3) form a first hydraulic cavity (301), which is filled with hydraulic medium. The bottom end of the first piston (4) A connecting rod (5) is fixedly connected. The bottom end of the connecting rod (5) extends to the outside of the first hydraulic cylinder body (3) and is fixedly connected to a support frame (6). A plurality of sliding rods (7) are fixedly connected to the top surface of the support frame (6). The sliding rods (7) slide vertically through the main hanger (1). A first return spring (8) is connected between the support frame (6) and the main hanger (1). The support frame (6) is provided with four mounting seats (10) arranged in a rectangular shape. The support frame (6) is provided with a lateral displacement driving mechanism that drives two of the mounting seats (10) to move laterally closer or further away from each other. The support frame (6) is provided with a longitudinal displacement driving mechanism that drives the other two mounting seats (10) to move longitudinally closer or further away from each other. The bottom end of the mounting seat (10) is provided with an L-shaped support plate (11) and a mounting plate (12). A second hydraulic cylinder body (9) is mounted on the mounting plate (12). A second piston (13) is horizontally slidably connected inside the second hydraulic cylinder body (9). One end face of the second piston (13) A stop rod (14) is fixedly connected. One end of the stop rod (14) extends to the outside of the second hydraulic cylinder (9) and is fixedly connected to a clamping plate (15). The clamping plate (15) is located below the L-shaped support plate (11). The end face of the second piston (13) away from the stop rod (14) forms a second hydraulic chamber (901) with the inside of the second hydraulic cylinder (9). The second hydraulic chamber (901) is connected to the first hydraulic chamber (301) through a flexible hydraulic pipe (16).

2. The hoisting and clamping equipment for fire ventilation ducts in building engineering according to claim 1, characterized in that, The lateral displacement driving mechanism includes a first bidirectional screw (17) that is laterally rotatably disposed at the bottom of the support frame (6). A lateral drive motor (18) for driving the first bidirectional screw (17) to rotate is installed at the bottom of the support frame (6). The two mounting seats (10) are respectively threaded to the two ends of the first bidirectional screw (17). Two lateral sliding grooves (601) are provided on the support frame (6). The mounting seats (10) are slidably connected to the lateral sliding grooves (601).

3. The hoisting and clamping equipment for fire ventilation ducts in building engineering according to claim 1, characterized in that, The longitudinal displacement driving mechanism includes a second bidirectional screw (19) that is longitudinally rotatably disposed at the bottom of the support frame (6). A longitudinal drive motor (20) for driving the second bidirectional screw (19) to rotate is installed at the bottom of the support frame (6). The two mounting seats (10) are respectively threaded to the two ends of the second bidirectional screw (19). Two longitudinal sliding grooves (602) are provided on the support frame (6). The mounting seats (10) are slidably connected to the longitudinal sliding grooves (602).

4. The hoisting and clamping equipment for fire ventilation ducts in building engineering according to claim 1, characterized in that, The center of gravity adjustment mechanism includes a lead screw (21) that is horizontally rotatably mounted on the main hanger (1). A lead screw motor (22) that drives the lead screw (21) to rotate is mounted on the main hanger (1). An adjustment seat (23) is threadedly connected to the lead screw (21). The adjustment seat (23) is slidably connected to the main hanger (1). The top end of the adjustment seat (23) is fixedly connected to the lifting ring (2).

5. The hoisting and clamping equipment for fire ventilation ducts in building engineering according to claim 4, characterized in that, An inclination sensor (24) is installed on the main hanger (1), and the detection axis of the inclination sensor (24) is parallel to the lead screw (21).

6. The hoisting and clamping equipment for fire protection and ventilation ducts in building engineering according to claim 1, characterized in that, The end face of the first piston (4) away from the connecting rod (5) forms a reset chamber (302) with the inner side of the first hydraulic cylinder (3), and a vent hole (303) is provided on one side of the first hydraulic cylinder (3) to communicate with the reset chamber (302).

7. The hoisting and clamping equipment for fire ventilation ducts in building engineering according to claim 1, characterized in that, The abutment rod (14) is fitted with a second return spring (25) on its outer periphery. The two ends of the second return spring (25) are respectively connected to the outer end face of the second hydraulic cylinder (9) and the clamping plate (15).

8. The hoisting and clamping equipment for fire ventilation ducts in building engineering according to claim 1, characterized in that, The L-shaped support plate (11) is provided with an elastic bearing pad, and the clamping working surface of the clamping plate (15) is embedded with an elastic clamping pad. The surface of the elastic clamping pad is provided with a grid-like anti-slip texture.

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