CN114955829A - Steel box girder buttress under limited space, steel box girder and hoisting method - Google Patents

Abstract

The invention discloses a steel box girder buttress, a steel box girder and a hoisting method under a limited space, wherein the steel box girder buttress comprises a top plate positioned at the top of the steel box girder and a hoisting device arranged on the top plate, a lifting hook is hung and buckled on the hoisting device, the hoisting device comprises an arc-shaped hoisting ring, two ends of the arc-shaped hoisting ring penetrate through the top plate, the arc-shaped hoisting ring is arranged on the top plate in a sliding manner along the length direction of the arc-shaped hoisting ring, a driving mechanism for driving the arc-shaped hoisting ring to slide, a locking mechanism for blocking the arc-shaped hoisting ring to slide and a control mechanism capable of unlocking the locking mechanism when the steel box girder is hoisted in place are arranged on the top plate, and the lifting hook is hung and buckled on the arc-shaped hoisting ring. This application has when the hoist and mount space ratio is limited, the effect that the lifting hook breaks away from hoist device of being convenient for.

Description

A kind of steel box girder support pier and steel box girder and hoisting method under limited space

technical field

The invention relates to the field of steel box girder hoisting technology, in particular to a steel box girder buttress, a steel box girder and a hoisting method in a limited space.

Background technique

With the continuous development of infrastructure construction in my country, road and bridge projects are also constantly being constructed. In large-span supporting bridges, the span of steel box girders can sometimes reach hundreds of meters or even thousands of meters, so steel box girders are usually divided into several beam sections. Manufactured and installed, steel box girders are widely used in current bridge projects. In the hoisting process of the steel box girder, a crane is usually used to hoist the steel box girder. In order to reduce the possibility of accidental separation of the hook from the object to be lifted, a hook with an opening that can be closed is usually used.

In the related art, the Chinese utility model patent with the publication number of CN208815417U discloses a bridge steel box girder hoisting device, including a steel box girder, the top surface of the steel box girder is fixedly connected with a hanging ring, at two lengths of the steel box girder. There is a positioning plate on the side, a lifting lug is arranged on the positioning plate, a connecting hole is opened on the top surface of the positioning plate and the steel box girder, the front end of the lifting lug is screwed with the two connecting holes, and the bottom of the steel box beam is provided with a connecting hole. There is a vertical positioning member, and a positioning suction cup is arranged at the lower end of the positioning plate.

In view of the above-mentioned related technologies, after the hook is hooked on the hoisting device, the opening of the hoisting hook will be closed. When the hoisting space is relatively limited, it is difficult for the staff to climb on the top surface of the steel box girder to disengage the hook from the hoisting device. , increasing the difficulty of hoisting work.

SUMMARY OF THE INVENTION

In order to facilitate the detachment of the hook from the hoisting device when the hoisting space is relatively limited, the present application provides a steel box girder support pier and a steel box girder under a limited space and a hoisting method.

In the first aspect, the steel box girder buttress and steel box girder under a kind of limited space provided by the application adopt the following technical solutions:

A steel box girder support pier and a steel box girder under a limited space, including a top plate located on the top of the steel box girder and a hoisting device arranged on the top plate, the hoisting device is hooked with a hook, and the hoisting device includes An arc-shaped suspension ring, both ends of the arc-shaped suspension ring pass through the top plate, the arc-shaped suspension ring is slidably arranged on the top plate along its length direction, and the top plate is provided with a drive for driving the arc-shaped suspension ring to slide A driving mechanism, a locking mechanism for hindering the sliding of the arc-shaped lifting ring, and a control mechanism for unlocking the locking mechanism when the steel box girder is hoisted in place, the hook is hooked on the arc on the ring.

By adopting the above technical solution, the locking mechanism prevents the arc-shaped suspension ring from sliding on the top plate along the length direction of the arc-shaped suspension ring. When the steel box girder is hoisted in place, the control mechanism releases the locked state of the arc-shaped suspension ring, and under the drive of the driving mechanism, the arc-shaped suspension ring is released. The hanging ring slides along the length of the curved hanging ring on the top plate, so that one end of the curved hanging ring is separated from the top plate, and a gap is formed between one end of the curved hanging ring and the top surface of the top plate, so that the lifting space is relatively limited. Disengage from the hoisting device.

Preferably, the side surface of the arc-shaped suspension ring is provided with a slot, the locking mechanism includes a fixing seat fixed on the top plate, the fixing seat is provided with a first sliding slot, and the first sliding slot slides in the first sliding slot. A sliding pin is provided, one end of which can be inserted into the card slot.

By adopting the above technical solution, the fixed seat is fixedly connected to the top plate, and the sliding pin is slidably arranged in the first sliding groove. When the steel box girder is not installed or hoisted, one end of the sliding pin is inserted into the arc-shaped lifting ring. This prevents the arc-shaped lifting ring from sliding during the hoisting process of the steel box girder, reduces the accidental opening of the arc-shaped lifting ring during the hoisting process of the steel box girder, and improves the safety of the steel box girder hoisting work. sex.

Preferably, a limit groove is formed on the side wall of the first sliding groove, a limit block is fixedly connected to the sliding pin, and the limit block is slidably arranged in the limit groove.

By adopting the above technical solution, the limiting groove is slidably arranged in the limiting groove, preventing the sliding pin from leaving the first sliding groove, and improving the stability of the locking mechanism structure.

Preferably, a first spring is arranged in the limiting groove, one end of the first spring is in contact with the side wall of the limiting groove away from the arc-shaped suspension ring, and one end of the first spring is in contact with the The limiting block is on the side face away from the arc-shaped hoisting ring.

By adopting the above technical solution, under the thrust of the first spring, the sliding pin is prevented from sliding into the first sliding groove, so that one end of the sliding pin can be inserted in the card groove more stably.

Preferably, the control mechanism includes an attracting block fixedly connected to the sliding pin, and an electromagnet for attracting the attracting block is fixedly connected to the side wall of the first sliding groove away from the arc-shaped hoisting ring. The top plate is also provided with a switch assembly that can conduct the electrical circuit of the electromagnet after the hook is dropped.

By adopting the above technical solution, when the steel box girder is hoisted in place, the hanging rope of the crane drives the hook to fall, so that the switch assembly conducts the electric circuit of the electromagnet, so that the electromagnet can attract the attraction block and slide to the first place together with the sliding pin. sliding in the groove, so that one end of the sliding pin can be separated from the clamping groove, so that the locking state of the locking mechanism is automatically released after the hook falls, so that the hook can be separated from the hoisting device.

Preferably, the switch assembly includes a fixing block fixedly connected to the top surface of the top plate, the fixing block is located directly below the arc-shaped suspension ring, and a second sliding groove is opened on the top surface of the fixing block, A control block is slidably arranged in the second sliding groove, a second spring that prevents the control block from sliding downward is arranged in the second sliding groove, and a fixed contact is embedded on the inner wall of the second sliding groove A moving contact block that can interfere with the fixed contact block is embedded on the side of the control block, a power supply is fixed on the top plate, and the moving contact block is electrically connected to one of the electrodes of the power supply, The other electrode of the power source is electrically connected with one end of the coil in the electromagnet, and the other end of the coil in the electromagnet is electrically connected with the fixed contact block.

By adopting the above technical solution, under the elastic force of the second spring, the movable contact block and the fixed contact block are separated. When the steel box girder is hoisted in place, the hanging rope of the crane drives the hook to fall. When the hook falls, the pressure control block overcomes the When the elastic force of the second spring slides into the second slide, the movable contact block collides with the fixed contact block, so that the segment circuit of the electromagnet is turned on, so that the locking state of the locking mechanism is automatically released after the hook falls.

Preferably, the driving mechanism includes a baffle plate fixed on the end of the arc-shaped hoisting ring, the baffle plate is located below the top plate, and a third spring is arranged between the baffle plate and the top plate, so that the One end of the third spring is in contact with the bottom surface of the top plate, and the other end of the third spring is in contact with the baffle plate.

By adopting the above technical solution, when the locking mechanism is unlocked, under the elastic force of the third spring, the third spring can drive the arc-shaped suspension ring to slide on the top plate, so that a gap is generated between one end of the arc-shaped suspension ring and the top surface of the ceiling plate , which is convenient for the hook to be disengaged from the hoisting device.

Preferably, a reinforcing tube is provided on the outer shell of the arc-shaped suspension ring, the arc-shaped suspension ring is slidably arranged in the reinforcement tube, the reinforcement tube is fixedly connected to the top plate, and the reinforcement tube is located away from the arc-shaped suspension ring. one end of the locking mechanism.

By adopting the above technical solution, the reinforcing pipe is fixed on the top plate, and the arc-shaped hoisting ring is slidably arranged in the reinforcing pipe, thereby improving the strength of the hoisting device.

In the second aspect, the hoisting method of a steel box girder pier and a steel box girder under a limited space provided by the application adopts the following technical scheme:

A method for hoisting a support pier of a steel box girder and a steel box girder in a limited space, comprising the following steps: S1: a worker hooks the hook on the arc-shaped lifting ring; S2: when the steel box girder is hoisted After being in place, the worker drops the hook through a sling; S3: The worker removes the hook from the hoisting device from the gap between one end of the arc-shaped hoisting ring and the top surface of the top plate .

By adopting the above technical solution, when the steel box girder is hoisted in place, the arc-shaped lifting ring slides along the length direction of the arc-shaped lifting ring on the top plate, so that a gap is generated between one end of the arc-shaped lifting ring and the top surface of the roof plate, so that the steel box girder When the hoisting space is relatively limited, it is convenient to disengage the hook from the hoisting device.

To sum up, the present application includes at least one of the following beneficial technical effects:

1. The locking mechanism prevents the arc-shaped lifting ring from sliding along the length of the arc-shaped lifting ring on the top plate. When the steel box girder is hoisted in place, the control mechanism releases the locked state of the arc-shaped lifting ring, and driven by the driving mechanism, the arc-shaped lifting ring is on the top plate. Slide up along the length of the arc-shaped lifting ring, so that one end of the arc-shaped lifting ring is separated from the top plate, and a gap is formed between one end of the arc-shaped lifting ring and the top surface of the top plate, so that when the lifting space is relatively limited, it is convenient for the hook to be removed from the lifting device. disengage;

2. The fixed seat is fixedly connected to the top plate, and the sliding pin is slidably arranged in the first sliding groove. When the steel box girder is not installed or hoisted, one end of the sliding pin is inserted into the slot on the arc-shaped lifting ring. , thereby hindering the sliding of the arc-shaped lifting ring during the hoisting process of the steel box girder, reducing the accidental opening of the arc-shaped lifting ring during the hoisting process of the steel box girder, and improving the safety of the steel box girder hoisting work;

3. Under the elastic force of the second spring, the moving contact block is separated from the fixed contact block. When the steel box girder is hoisted in place, the hanging rope of the crane drives the hook to fall. When the hook presses the control block, it overcomes the elastic force of the second spring. When sliding into the second slide, the movable contact block and the fixed contact block collide, so that the segment circuit of the electromagnet is turned on, so that the locking state of the locking mechanism is automatically released after the hook falls.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of a steel box girder in an embodiment of the present application.

FIG. 2 is a cross-sectional view of a top plate and a hoisting device in an embodiment of the present application.

FIG. 3 is a partial enlarged view of A in FIG. 2 .

FIG. 4 is a partial enlarged view of B in FIG. 2 .

Description of reference numbers:

1. Hoisting device; 11. Arc-shaped lifting ring; 111, Card slot; 12, Reinforcing pipe; 13, Locking mechanism; 131, Fixed seat; 1311, First sliding groove; 134, the first spring; 14, the control mechanism; 141, the electromagnet; 142, the attraction block; 143, the power supply; 144, the switch assembly; 145, the fixed block; block; 147, second spring; 148, fixed contact block; 149, moving contact block; 15, drive mechanism; 151, baffle; 152, third spring; 2, top plate; 100, steel box beam; 101, hook .

Detailed ways

The present application will be further described in detail below in conjunction with accompanying drawings 1-4.

The embodiments of the present application disclose a steel box girder support pier and a steel box girder under a limited space. 1 and 2, the steel box girder 100 includes a hoisting device 1 and a top plate 2, the top plate 2 is horizontally arranged on the top of the steel box girder 100, and the hoisting device 1 is located on the top plate 2. They are located at the four corners of the top plate 2 respectively.

Referring to FIGS. 2 and 3 , the hoisting device 1 includes an arc-shaped hoisting ring 11 , a reinforcing pipe 12 , a locking mechanism 13 , a control mechanism 14 and a driving mechanism 15 . The arc-shaped suspension ring 11 is preferably arc-shaped, and both ends of the arc-shaped suspension ring 11 pass through the top plate 2 . A hook 101 is provided on the arc-shaped hanging ring 11 for hanging.

Referring to FIG. 2 and FIG. 3 , the locking mechanism 13 includes a fixed seat 131 , a sliding pin 132 , a limit block 133 and a first spring 134 . The fixed seat 131 is located below the top plate 2 , and the fixed seat 131 is welded and fixed on the top plate 2 . A first sliding groove 1311 is defined on the side of the fixing base 131 close to the arc-shaped suspension ring 11 , the sliding pin 132 is slidably arranged in the first sliding groove 1311 , and the sliding pin 132 is provided with an inclined surface, and the inclined surface is located on the sliding pin 132 close to the arc-shaped suspension ring 11 . At one end of the slide pin 132, the inclined surface is located at the upper part.

Referring to FIGS. 2 and 3 , a limiting slot 1312 is defined on the top wall of the first sliding slot 1311 , the length direction of the limiting slot 1312 is parallel to the sliding direction of the sliding pin 132 , and the limiting block 133 is welded and fixed to the sliding pin 132 On the top surface of , the limiting block 133 is slidably arranged in the limiting groove 1312 . A first spring 134 is disposed in the limiting groove 1312 , one end of the first spring 134 abuts on the side wall of the limiting groove 1312 away from the arc-shaped suspension ring 11 , and one end of the first spring 134 abuts against the limiting block 133 away from the arc-shaped suspension ring 11 on the side. The side surface of the arc-shaped suspension ring 11 is provided with a card slot 111 , and under the elastic force of the first spring 134 , one end is slidably arranged to be inserted into the card slot 111 .

Referring to FIG. 2 , the reinforcing tube 12 is sleeved outside the arc-shaped lifting ring 11, the arc-shaped lifting ring 11 and the inner hole of the reinforcing tube 12 are gap-fitted, the reinforcing tube 12 is welded and fixed on the top surface of the top plate 2, and the reinforcing tube 12 is located in the arc-shaped lifting ring 12. One end of the ring 11 away from the locking mechanism 13 .

2 and 3 , the control mechanism 14 includes an electromagnet 141 , an attraction block 142 , a power source 143 and a switch assembly 144 . The attraction block 142 is fixedly connected to the end surface of the sliding pin 132 away from the arc-shaped suspension ring 11 , the electromagnet 141 is fixedly connected to the side wall of the first sliding groove 1311 away from the arc-shaped suspension ring 11 , and the electromagnet 141 is flush with the attraction block 142 . The power source 143 is fixedly connected to the bottom surface of the top plate 2 .

2 and 4 , the switch assembly 144 includes a fixed block 145 , a control block 146 , a second spring 147 , a fixed contact block 148 and a movable contact block 149 . The fixing block 145 is welded and fixed on the top surface of the top plate 2 , and the fixing block 145 is located just below the arc-shaped suspension ring 11 . The top surface of the fixing block 145 is provided with a second sliding slot 1451, the control block 146 is slidably arranged in the second sliding slot 1451, the second spring 147 is arranged in the second sliding slot 1451, and one end of the second spring 147 is fixedly connected to the second sliding slot 1451. On the bottom wall of the second sliding slot 1451 , the other end of the second spring 147 is fixedly connected to the bottom surface of the control block 146 .

2 , 3 and 4 , the fixed contact block 148 is embedded on the inner wall of the second sliding slot 1451 , the movable contact block 149 is embedded on the side surface of the control block 146 , and the elastic force of the second spring 147 acts Bottom, the moving contact block 149 is located above the fixed contact block 148 . The movable contact block 149 is electrically connected to one electrode of the power source 143 , the other electrode of the power source 143 is electrically connected to one end of the coil of the electromagnet 141 , and the other end of the coil of the electromagnet 141 is electrically connected to the fixed contact block 148 . When the hook 101 falls down, the hook 101 presses the control block 146 to make the control block 146 slide into the second sliding groove 1451 , so that the movable contact block 149 collides with the fixed contact block 148 .

Referring to FIG. 2 , the driving mechanism 15 includes a baffle 151 and a third spring 152 . The baffle 151 is a circular plate, the baffle 151 is welded and fixed to the end of the arc-shaped suspension ring 11 , the baffle 151 is located at the end of the arc-shaped suspension ring 11 away from the locking mechanism 13 , the baffle 151 is located below the top plate 2 , and the third spring 152 Located between the baffle 151 and the top plate 2 , one end of the third spring 152 abuts on the bottom surface of the top plate 2 , and the other end of the third spring 152 abuts on the baffle 151 .

The implementation principle of a steel box girder support pier and a steel box girder in a limited space in the embodiment of the present application is as follows: after the steel box girder 100 is hoisted in place, the hoisting rope of the crane drives the hook to fall, and when the hook 101 falls, it presses the control block 146 When overcoming the elastic force of the second spring 147 and sliding into the second slide, the movable contact block 149 collides with the fixed contact block 148 , the electrical circuit of the electromagnet 141 is turned on, the electromagnet 141 attracts the attraction block 142 and together with the sliding pin 132 By sliding into the first sliding groove 1311, one end of the sliding pin 132 can be separated from the clamping groove 111, so that the locking state of the locking mechanism 13 is automatically released after the hook 101 falls.

When the locking mechanism 13 is unlocked, under the elastic force of the third spring 152, the arc-shaped suspension ring 11 slides on the top plate 2 along the length direction of the arc-shaped suspension ring 11, so that one end of the arc-shaped suspension ring 11 is separated from the top plate 2, and the arc-shaped suspension A gap is created between one end of the hoisting ring 11 and the top surface of the top plate 2 , so that when the hoisting space is relatively limited, it is convenient for the hoisting hook 101 to be disengaged from the hoisting device 1 .

The embodiment of the present application also discloses a method for hoisting a steel box girder support pier and a steel box girder under a limited space, comprising the following steps:

S1: The worker hooks the hook 101 on the arc-shaped lifting ring 11; S2: After the steel box girder 100 is hoisted in place, the worker drops the hook 101 through the sling; S3: The worker removes the hook 101 from the arc The hoisting device 1 is separated from the gap between one end of the hoisting ring 11 and the top surface of the top plate 2 .

The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore: all equivalent changes made according to the structure, shape and principle of the present application should be covered within the scope of the present application. Inside.

Claims (9)

1. A steel box girder support pier and a steel box girder under a limited space, comprising a top plate (2) located at the top of the steel box girder (100) and a hoisting device (1) arranged on the top plate (2), the The hoisting device (1) is provided with a hook (101), characterized in that: the hoisting device (1) comprises an arc-shaped hoisting ring (11), and both ends of the arc-shaped hoisting ring (11) pass through the A top plate (2), the arc-shaped suspension ring (11) is slidably arranged on the top plate (2) along its length direction, and a drive for driving the arc-shaped suspension ring (11) to slide is provided on the top plate (2) A mechanism (15), a locking mechanism (13) for hindering the sliding of the arc-shaped hoisting ring (11), and a locking mechanism (13) that can be unlocked when the steel box girder (100) is hoisted in place A control mechanism (14), wherein the hook (101) is hooked on the arc-shaped suspension ring (11). 2. The steel box girder support pier and the steel box girder under a limited space according to claim 1, characterized in that: the side surface of the arc-shaped lifting ring (11) is provided with a clamping groove (111), and the locking mechanism (13) comprising a fixing seat (131) fixed on the top plate (2), the fixing seat (131) is provided with a first sliding groove (1311), and the first sliding groove (1311) is slidably arranged in the first sliding groove (1311) There is a sliding pin (132) whose one end can be inserted into the card slot (111). 3. The steel box girder support pier and the steel box girder under a limited space according to claim 2, wherein a limit slot (1312) is provided on the side wall of the first sliding slot (1311), so that the A limiting block (133) is fixedly connected to the sliding pin (132), and the limiting block (133) is slidably arranged in the limiting groove (1312). 4. The steel box girder support pier and the steel box girder under a limited space according to claim 3, wherein a first spring (134) is arranged in the limiting groove (1312), and the first One end of the spring (134) is in contact with the side wall of the limiting groove (1312) away from the arc-shaped suspension ring (11), and one end of the first spring (134) is in contact with the limiting block (133) away from the side of the arc-shaped hoisting ring (11). 5 . The steel box girder support pier and the steel box girder under a limited space according to claim 4 , wherein the control mechanism ( 14 ) comprises an attraction block fixedly connected to the sliding pin ( 132 ). 6 . (142), an electromagnet (141) for attracting the attracting block (142) is fixedly connected to the side wall of the first sliding groove (1311) away from the arc-shaped hoisting ring (11), and the top plate (2) ) is also provided with a switch assembly (144) that can conduct the electrical circuit of the electromagnet (141) after the hook (101) falls. 6 . The steel box girder support pier and the steel box girder under a limited space according to claim 5 , wherein the switch assembly ( 144 ) comprises a fixed connection on the top surface of the top plate ( 2 ). 7 . block (145), the fixing block (145) is located directly below the arc-shaped lifting ring (11), a second sliding groove (1451) is opened on the top surface of the fixing block (145), the second A control block (146) is slidably arranged in the sliding groove (1451), and a second spring (147) that prevents the control block (146) from sliding downward is arranged in the second sliding groove (1451). A fixed contact block (148) is embedded on the inner walls of the two sliding grooves (1451), and a movable contact block (149) that can interfere with the fixed contact block (148) is embedded on the side surface of the control block (146). ), a power supply (143) is fixed on the top plate (2), the moving contact block (149) is electrically connected to one electrode of the power supply (143), and the other electrode of the power supply (143) is electrically connected to the power supply (143). One end of the coil in the electromagnet (141) is electrically connected, and the other end of the coil in the electromagnet (141) is electrically connected with the fixed contact block (148). 7. A steel box girder support pier and steel box girder under a limited space according to claim 1, characterized in that: the driving mechanism (15) comprises a A baffle plate (151), the baffle plate (151) is located below the top plate (2), and a third spring (152) is arranged between the baffle plate (151) and the top plate (2). One end of the third spring (152) is in contact with the bottom surface of the top plate (2), and the other end of the third spring (152) is in contact with the baffle plate (151). 8. A steel box girder buttress and steel box girder under a limited space according to claim 1, characterized in that: the arc-shaped lifting ring (11) is provided with a reinforcing pipe (12) on the outer shell, and the arc-shaped lifting ring is provided with a reinforcing pipe (12). (11) is slidably arranged in the reinforcing pipe (12), the reinforcing pipe (12) is fixedly connected to the top plate (2), and the reinforcing pipe (12) is located away from the arc-shaped lifting ring (11) One end of the locking mechanism (13). 9. the hoisting method of steel box girder buttress and steel box girder under a limited space, the steel box girder buttress and steel box girder under a kind of limited space according to claim 6, is characterized in that, comprises the steps: S1: The worker hangs the hook (101) on the arc-shaped lifting ring (11); S2: After the steel box girder (100) is hoisted in place, the worker makes the hook (101) drop through a sling; S3: The worker removes the hook (101) from the hoisting device (1) from the gap created between one end of the arc-shaped hoisting ring (11) and the top surface of the top plate (2).

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