CN219929422U - Draft tube overhauling lifting device - Google Patents

Abstract

The utility model discloses a draft tube overhauling and lifting device which comprises a base, a support, a first pulley, a second pulley, a winch and a cable, wherein the support is detachably connected with the base, the support is provided with an accommodating space, the first pulley is arranged at the top of the support and is adjacent to the accommodating space, the second pulley is arranged at the edge of the top of the support and is positioned at the top of the support, the axes of the second pulley and the first pulley are consistent, the winch is pivotably connected with the support, the first end of the cable is arranged in the accommodating space and is suitable for hoisting a steel frame hanging cage, the middle rope portion of the cable is sequentially arranged on the first pulley and the second pulley, and the second end of the cable is wound on the winch. The draft tube overhauling lifting device provided by the utility model has the advantages of convenience for workers to go up and down, high safety and difficult damage to overhauling equipment.

Description

Draft tube overhauling lifting device

Technical Field

The utility model relates to the technical field of hydropower stations, in particular to a draft tube overhauling lifting device.

Background

In the related art, when working equipment of a draft tube and a water collecting well of a hydropower station is overhauled, workers need to enter the draft tube/the water collecting well by means of a rope ladder, so that the operation is inconvenient up and down, and the danger degree is high. The maintenance equipment is bound by the rope and put into the draft tube/water collecting well, and is easy to collide with the peripheral wall of the draft tube/water collecting well, so that the maintenance equipment is damaged.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the utility model provides the draft tube overhauling lifting device, which has the advantages of convenience for workers to go up and down, high safety and difficult damage to overhauling equipment.

The draft tube overhauling lifting device comprises a base, a bracket, a first pulley, a second pulley, a winch and a cable, wherein the bracket is detachably connected with the base, and the bracket is provided with an accommodating space; the first pulley is arranged at the top of the bracket and is adjacent to the accommodating space; the second pulley is arranged on the bracket and positioned at the edge of the top of the bracket, and the axes of the second pulley and the first pulley are consistent; the winch and the bracket are pivotally connected; the first end of the cable is arranged in the accommodating space and is suitable for hoisting the steel frame cage, the middle rope portion of the cable is sequentially arranged on the first pulley and the second pulley, and the second end of the cable is wound on the winch.

According to the draft tube overhauling and lifting device disclosed by the embodiment of the utility model, the base can be firstly arranged at the inlet of the draft tube/water collecting well, overhauling equipment is arranged in the steel frame hanging cage, so that the first end of the cable is hung on the steel frame hanging cage, the winch is rotated, the cable is driven to lift by the winch through the first pulley and the second pulley, and the cable drives the steel frame hanging cage to lift, so that the overhauling equipment in the steel frame hanging cage can enter and exit the draft tube/water collecting well. In addition, when the cable shakes due to external force interference, the cable drives the steel frame cage to shake, the steel frame cage collides with the peripheral wall of the draft tube/water collecting well, and the overhaul equipment is arranged in the steel frame cage, so that the direct collision with the peripheral wall of the draft tube/water collecting well is avoided, the structural damage is avoided, the self-protection is realized, and the service life of the overhaul equipment is prolonged.

In addition, the staff can also get into in the steelframe cage, control the lift of steelframe cage through the hawser by the capstan winch to realized the business turn over of staff at draft tube/sump pit. In the process, the steel frame cage realizes the limitation and protection of the staff, avoids the occurrence of the condition that the staff steps on the sky when stepping up and down by means of the rope ladder, improves the safety coefficient of the staff, and simultaneously, enhances the convenience of the staff for entering and exiting the draft tube/water collecting well.

In some embodiments, the stand includes a first stand, a second stand, and a cross-frame, the first stand removably mounted to the base and located on a first side of the base; the second stand is detachably arranged on the base and positioned on the second side of the base, and the first stand is opposite to the second stand; the both ends of crossbearer respectively with the top of first grudging post with the top of second grudging post links to each other, first grudging post second grudging post with the crossbearer encloses to close and has formed accommodation space, first pulley with the second pulley all install in the crossbearer deviates from accommodation space's one side, the second pulley is located the first end of crossbearer, capstan winch pivotally install in first grudging post deviates from accommodation space's one side.

In some embodiments, the top of the cross frame is provided with a guide rail extending in the length direction of the cross frame, the first pulley is matched with the guide rail, the guide rail is provided with two limiting side walls opposite in the width direction of the guide rail, the limiting side walls are provided with guide grooves extending in the length direction of the guide rail, the first pulley is positioned between the two limiting side walls, the centers of two end faces of the first pulley are respectively provided with an axle, the two axles are in one-to-one correspondence with the two guide grooves, the axles are matched in the corresponding guide grooves, the limiting side walls are provided with a plurality of clamping grooves which are distributed at intervals in the length direction of the guide rail, the clamping grooves are positioned below the guide grooves and are communicated with the guide grooves, and each clamping groove is matched with the axle; the guide rail is provided with a limiting bottom wall extending in the width direction of the guide rail, the limiting bottom wall is connected with the bottom ends of the two limiting side walls, the limiting bottom wall is provided with a through groove extending in the length direction of the guide rail, and the middle rope portion of the mooring rope penetrates through the through groove.

In some embodiments, the draft tube service lifting device further includes a support plate, a first gear and a second gear, the support plate being mounted to a side of the first stand facing away from the accommodation space, the support plate extending in a direction away from the accommodation space, the support plate having first and second plate surfaces opposite in a thickness direction thereof, the winch being pivotally mounted to the first plate surface; the first gear is positioned at one side of the winch, which is away from the first plate surface, and the first gear is coaxially connected with the winch; the second gear is pivotally mounted on the first plate surface, the second gear is meshed with the first gear, and the second gear is smaller than the pitch circle diameter of the first gear.

In some embodiments, the draft tube service lifting device further comprises a ratchet wheel, a pawl and an elastic piece, wherein the ratchet wheel is pivotally mounted on the second plate surface and is coaxially connected with the winch; the pawl is provided with a connecting end and a free end which are opposite in the length direction, the connecting end is pivotally arranged on the second plate surface, and the free end is clamped with the ratchet wheel; the elastic member connects the pawl and the second plate surface so as to press the pawl against the ratchet.

In some embodiments, the draft tube overhauling lifting device further comprises a support shaft, the support shaft extends in the thickness direction of the supporting plate, the connecting end is pivotally connected with the second plate surface through the support shaft, the elastic piece comprises a torsion spring, the torsion spring is sleeved on the support shaft, and two ends of the torsion spring are respectively connected with the pawl and the second plate surface.

In some embodiments, the draft tube service lift apparatus further comprises a stem, a first end of the stem being coupled to the second gear, and a second end of the stem being adapted to be held.

In some embodiments, the draft tube overhauling lifting device further comprises a first bolt and a second bolt, wherein the number of the first bolts is multiple, and the bottom end of the first stand is connected with the base through the multiple first bolts; the number of the second bolts is multiple, and the bottom ends of the second vertical frames are connected with the base through the second bolts.

In some embodiments, the draft tube overhauling lifting device further comprises a first inclined strut, a second inclined strut, a third inclined strut and a fourth inclined strut, wherein two ends of the first inclined strut are respectively connected with the first vertical frame and the transverse frame; two ends of the second diagonal brace are respectively connected with the second vertical frame and the transverse frame; two third inclined struts are in mirror symmetry with respect to the first vertical frame, and two ends of each of the two third inclined struts are respectively connected with the first vertical frame and the base; the four diagonal braces are two and are in mirror symmetry with respect to the second vertical frame, and two ends of each of the two four diagonal braces are respectively connected with the second vertical frame and the base.

In some embodiments, the draft tube service lifting device further comprises a lifting ring, a lifting rope and a lifting hook, wherein the lifting ring is connected with the first end of the cable; the lifting ropes are arranged in a plurality and are distributed at intervals in the circumferential direction of the lifting ring, the first ends of the lifting ropes form rope sleeves, and the rope sleeves are sleeved on the lifting ring; the lifting hooks are equal in number and correspond to the lifting ropes one by one, the lifting hooks are connected with the second ends of the corresponding lifting ropes, and the lifting hooks are suitable for being matched with lifting lugs of the steel frame lifting cage.

Drawings

Fig. 1 is a schematic view of a draft tube service lifting device according to an embodiment of the present utility model.

Fig. 2 is a partial schematic view of a draft tube service lift apparatus according to an embodiment of the present utility model.

Fig. 3 is a further partial schematic view of a draft tube service lift apparatus according to an embodiment of the present utility model.

Reference numerals: 1. a base; 2. a bracket; 21. a first stand; 22. a second stand; 23. a cross frame; 231. a guide rail; 232. a guide groove; 233. a clamping groove; 234. a through groove; 24. an accommodation space; 25. a first diagonal brace; 26. a second diagonal brace; 27. a third diagonal brace; 28. a fourth diagonal brace; 3. a first pulley; 31. a wheel axle; 4. a second pulley; 5. a winch; 6. a cable; 61. a hanging ring; 7. a support plate; 71. a first panel; 711. a first gear; 712. a second gear; 713. a rotating handle; 72. a second panel; 721. a ratchet wheel; 722. a pawl; 723. a support shaft; 73. a rotating shaft; 8. a hanging rope; 81. and (5) a lifting hook.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A draft tube service lifting device according to an embodiment of the present utility model is described below with reference to fig. 1 to 3.

As shown in fig. 1, the draft tube maintenance lifting device according to the embodiment of the utility model comprises a base 1, a bracket 2, a first pulley 3, a second pulley 4, a winch 5 and a cable 6, wherein the bracket 2 is detachably connected with the base 1, and the bracket 2 is provided with an accommodating space 24; the first pulley 3 is mounted on top of the bracket 2 and adjacent to the accommodation space 24; the second pulley 4 is arranged on the bracket 2 and positioned at the edge of the top of the bracket 2, and the axes of the second pulley 4 and the first pulley 3 are consistent; the winch 5 and the bracket 2 are pivotally connected; the first end of the cable 6 is disposed in the accommodating space 24 and is suitable for hoisting a steel frame cage, the middle rope portion of the cable 6 is sequentially arranged on the first pulley 3 and the second pulley 4, and the second end of the cable 6 is wound on the winch 5.

According to the draft tube overhauling and lifting device disclosed by the embodiment of the utility model, the base 1 can be firstly arranged at the inlet of the draft tube/water collecting well, overhauling equipment is arranged in the steel frame cage, the first end of the cable 6 is hung on the steel frame cage, the winch 5 is rotated, the cable 6 is driven to lift by the winch 5 through the first pulley 3 and the second pulley 4, and the cable 6 drives the steel frame cage to lift, so that the overhauling equipment in the steel frame cage can enter and exit the draft tube/water collecting well, and the overhauling device is simple and convenient. In addition, when the cable 6 shakes due to external force interference, the cable 6 drives the steel frame cage to shake, the steel frame cage collides with the peripheral wall of the draft tube/water collecting well, and the overhaul equipment is arranged in the steel frame cage, so that the direct collision with the peripheral wall of the draft tube/water collecting well is avoided, the structural damage is avoided, the self-protection is realized, and the service life of the overhaul equipment is prolonged.

In addition, the staff can also get into in the steelframe cage, control the lift of steelframe cage through hawser 6 by capstan winch 5 to realized the business turn over of staff at draft tube/sump pit. In the process, the steel frame cage realizes the limitation and protection of the staff, avoids the occurrence of the condition that the staff steps on the sky when stepping up and down by means of the rope ladder, improves the safety coefficient of the staff, and simultaneously, enhances the convenience of the staff for entering and exiting the draft tube/water collecting well.

Wherein the first pulley 3 and the second pulley 4 facilitate changing the orientation of the cable 6, and in addition, contact between the cable 6 and the bracket 2 is avoided, and wear of the cable 6 during movement is reduced.

For ease of understanding, arrow a in fig. 1 shows the up-down/vertical direction of the draft tube service lifting device.

In some embodiments, as shown in fig. 1, the stand 2 includes a first stand 21, a second stand 22, and a cross frame 23, the first stand 21 being removably mounted to the base 1 and located on a first side of the base 1. The second stand 22 is detachably mounted to the base 1 and located at a second side of the base 1, and the first stand 21 and the second stand 22 are opposite. The both ends of crossbearer 23 link to each other with the top of first grudging post 21 and the top of second grudging post 22 respectively, and first grudging post 21, second grudging post 22 and crossbearer 23 enclose to close and have formed accommodation space 24, and first pulley 3 and second pulley 4 are all installed in the one side that crossbearer 23 deviates from accommodation space 24, and second pulley 4 is located the first end of crossbearer 23, and capstan winch 5 pivotally installs in the one side that first grudging post 21 deviates from accommodation space 24.

Thus, the structure of the bracket 2 is simpler and easier to manufacture and use. The first pulley 3 is used to support the cable 6 and assist the cable 6 in changing direction towards the second pulley 4, and the second pulley 4 is used to support the cable 6 and assist the cable 6 in changing direction towards the winch 5. In addition, the first pulley 3 and the second pulley 4 space the cable 6 from the bracket 2, thereby avoiding contact between the cable 6 and the bracket 2 and reducing resistance to movement of the cable 6.

Specifically, the first stand 21 and the second stand 22 are opposed in the lateral direction.

It will be appreciated that the cross frame 23 extends in the transverse direction.

It will be appreciated that the first pulley 3 and the second pulley 4 are spaced apart in the direction of extension of the cross frame 23.

It will be appreciated that the first pulley 3 and the second pulley 4 are both located above the cross frame 23.

It will be appreciated that the winch 5 is located below the first pulley 3 and the second pulley 4.

For ease of understanding, arrow B in fig. 1 shows the lateral direction of the draft tube service lift.

In some embodiments, as shown in fig. 1 and 3, the top of the cross frame 23 is provided with a guide rail 231 extending along the length direction thereof, the first pulley 3 is matched with the guide rail 231, the guide rail 231 is provided with two opposite limit side walls along the width direction thereof, the limit side walls are provided with guide grooves 232 extending along the length direction of the guide rail 231, the first pulley 3 is positioned between the two limit side walls, the centers of two end surfaces of the first pulley 3 are respectively provided with an axle 31, the two axles 31 and the two guide grooves 232 are in one-to-one correspondence, the axle 31 is matched in the corresponding guide grooves 232, the limit side walls are provided with a plurality of clamping grooves 233 which are distributed at intervals along the length direction of the guide rail 231, the clamping grooves 233 are positioned below the guide grooves 232 and are communicated with the guide grooves 232, and each of the clamping grooves 233 is matched with the axle 31; the guide rail 231 has a limit bottom wall extending in its width direction, the limit bottom wall connecting the bottom ends of the two limit side walls, the limit bottom wall being provided with a through slot 234 extending in the length direction of the guide rail 231, the intermediate rope portion of the cable 6 passing through the through slot 234.

Therefore, the effect that the first pulley 3 slides on the guide rail 231 along the length direction of the guide rail 231 can be realized by sliding the wheel shaft 31 in the corresponding guide groove 232, when the wheel shaft 31 rotates to any clamping groove 233, the first pulley 3 can be loosened, and the wheel shaft 31 falls into the clamping groove 233 under the action of dead weight. At this time, the winch rotates, the winch drives the second pulley 4 and the first pulley 3 to rotate through the cable 6, and the first pulley 3 cannot slide relative to the guide rail 231 due to the limit of the clamping groove 233 and can only rotate in the clamping groove 233, so that the clamping groove 233 realizes positioning of the wheel axle 31.

It will be appreciated from the foregoing that by engaging the axle 31 within different detents 233, the first end of the cable 6 and the location of the steel frame cage within the draft tube/sump may be varied to be adjacent to the service equipment within the draft tube/sump, thereby facilitating lifting and lowering of the service equipment.

It will be appreciated that when the first pulley 3 slides along the length direction of the guide rail 231, the middle rope portion of the cable 6 that is mounted on the first pulley 3 also moves with the first pulley 3, and the through groove 234 is used for yielding the middle rope portion of the moving cable 6, so that the middle rope portion of the cable 6 can pass through the guide rail 231 and the cross frame 23 in real time.

Wherein the cross frame 23 has a movable gap extending in a length direction thereof, the movable gap and the through groove 234 are vertically corresponding and communicated, and the intermediate rope portion of the rope 6 passes through the through groove 234 and the movable gap.

For ease of understanding, arrow C in fig. 1 shows the fore-and-aft direction of the draft tube service lifting device, i.e., the width direction of the guide rail 231.

In some embodiments, as shown in fig. 1, the draft tube service lifting apparatus further includes a support plate 7, a first gear 711 and a second gear 712, the support plate 7 is mounted on a side of the first stand 21 facing away from the accommodating space 24, the support plate 7 extends in a direction away from the accommodating space 24, the support plate 7 has a first plate surface 71 and a second plate surface 72 opposite in a thickness direction thereof, and the winch 5 is pivotally mounted on the first plate surface 71. The first gear 711 is located at a side of the winch 5 facing away from the first plate surface 71, and the first gear 711 is coaxially connected to the winch 5. A second gear 712 is pivotally mounted to the first plate surface 71, the second gear 712 and the first gear 711 are meshed, and the second gear 712 is smaller than the pitch diameter of the first gear 711.

Therefore, when the second gear 712 is rotated, the second gear 712 drives the first gear 711 to rotate, and the first gear 711 drives the winch 5 to rotate, so that the winch 5 can retract and release the cable 6. The second gear 712 has a smaller reference circle diameter, so that the second gear 712 drives the first gear 711 to rotate to form a labor-saving lever, thereby rotating the second gear 712 more labor-saving and reducing manpower consumption.

Specifically, the diameter of the first gear 711 is larger than the diameter of the capstan 5.

Specifically, the capstan 5 has first and second end surfaces opposite in the thickness direction thereof, the first end surface being in contact with the first plate surface 71, the second end surface being in contact with the first gear 711. Thereby exhibiting an effect that the capstan 5 is sandwiched between the first gear 711 and the support plate 7. When the winch 5 winds the cable 6, the first gear 711 and the support plate 7 achieve a limit for the cable 6, avoiding the cable 6 from falling off the winch 5.

It will be appreciated that the support plate 7 extends in the transverse direction.

In some embodiments, as shown in fig. 2, the draft tube service lift apparatus further includes a ratchet 721, a pawl 722, and an elastic member, the ratchet 721 being pivotally mounted to the second deck 72 and coaxially coupled to the winch 5. The pawl 722 has a connecting end and a free end opposite in length, the connecting end being pivotally mounted to the second plate surface 72, the free end being engaged with the ratchet 721. The resilient member connects the pawl 722 and the second plate 72 to urge the pawl 722 against the ratchet 721.

Thus, when the winch 5 rotates and withdraws the cable 6, the cable 6 drives the steel frame cage to rise. At the same time, the capstan 5 rotates the ratchet 721, and the ratchet 721 pushes the pawl 722 open when rotating. When the external force acting on the winch 5 disappears, the steel frame cage has a tendency to descend under its own weight, and the winch 5 is attempted to be driven to rotate reversely through the power transmission of the cable 6. While the pawl 722 is kept in contact with the ratchet 721 at a moment by the elastic member, the pawl 722 blocks the reverse rotation of the capstan 5, thereby achieving a non-return effect. Thereby avoiding the high-speed falling of the steel frame cage, reducing the operation risk and guaranteeing the safety of workers.

Wherein when the steel frame cage is lowered, the pawl 722 is pulled out, and the pawl 722 and the ratchet 721 are separated. The second gear 712 is reversed, and the second gear 712 drives the winch 5 to rotate reversely through the first gear 711, so that the winch 5 slowly releases the cable 6, and the steel frame cage is slowly released by the first end of the cable 6.

Specifically, the draft tube overhauling lifting device further comprises a rotating shaft 73, the supporting plate 7 is provided with a through hole extending in the thickness direction of the supporting plate, the rotating shaft 73 is pivotally matched with the through hole, the rotating shaft 73 is provided with a first shaft section and a second shaft section, the first shaft section protrudes out of the through hole and is on the same side as the first plate surface 71, the second shaft section protrudes out of the rotating shaft 73 and is on the same side as the second plate surface 72, the winch 5 and the first gear 711 are both sleeved and fixed on the first shaft section, and the ratchet 721 is sleeved and fixed on the second shaft section. Thereby, the coaxial connection of the ratchet 721 and the capstan 5 is achieved.

In some embodiments, as shown in fig. 2, the draft tube service lifting device further includes a support shaft 723, the support shaft 723 extends in a thickness direction of the support plate 7, the connection ends are pivotably connected to the second plate surface 72 through the support shaft 723, and the elastic member includes a torsion spring, which is sleeved on the support shaft 723, and both ends of which are respectively connected to the pawl 722 and the second plate surface 72.

Thus, the fulcrum 723 acts as a connecting medium between the pawl 722 and the second plate surface 72, facilitating pivotable connection therebetween. The torsion spring serves to provide the pawl 722 with an elastic force toward the ratchet 721, so that the pawl 722 is brought into contact with the ratchet 721 at a time, thereby achieving a non-return effect.

In some embodiments, as shown in fig. 1, the draft tube service lift apparatus further includes a stem 713, a first end of the stem 713 coupled to the second gear 712, and a second end of the stem 713 adapted to be held.

Therefore, the second gear 712 is rotated by the hand through the rotating handle 713, and the rotating handle 713 avoids the hand from directly contacting and driving the second gear 712, so that the operation difficulty is reduced, and the hand is protected.

Specifically, the stem 713 extends in a radial direction of the second gear 712, and a first end of the stem 713 is connected to a center of the second gear 712.

In some embodiments, as shown in fig. 1, the draft tube maintenance lifting device further includes a first bolt and a second bolt, the number of the first bolts is plural, and the bottom end of the first stand 21 is connected to the base 1 through the plural first bolts. The number of the second bolts is plural, and the bottom end of the second stand 22 is connected to the base 1 by plural second bolts.

Thereby, the first bolt enables the detachable connection of the first stand 21 and the base 1, and the second bolt enables the detachable connection of the second stand 22 and the base 1.

Specifically, the bottom of the first stand 21 is provided with a first circular plate whose axis extends in the vertical direction, the first circular plate is provided with a plurality of first mounting holes distributed at equal intervals in the circumferential direction thereof, the base 1 is provided with first threaded holes which are equal in number and in one-to-one correspondence with the plurality of first mounting holes, the first bolts are equal in number and in one-to-one correspondence with the first mounting holes, and the first bolts are matched with the corresponding first threaded holes through the corresponding first mounting holes. Whereby the connection of the first stand 21 and the base 1 is achieved.

Specifically, the bottom end of the second stand 22 is provided with a second circular plate with an axis extending in the vertical direction, the second circular plate is provided with a plurality of second mounting holes distributed at equal intervals in the circumferential direction of the second circular plate, the base 1 is provided with second threaded holes which are equal in number and in one-to-one correspondence with the plurality of second mounting holes, the second bolts are equal in number and in one-to-one correspondence with the second mounting holes, and the second bolts are matched with the corresponding second threaded holes through the corresponding second mounting holes. Whereby the connection of the second stand 22 to the base 1 is achieved.

In some embodiments, as shown in fig. 1, the draft tube service lifting apparatus further includes a first diagonal brace 25, a second diagonal brace 26, a third diagonal brace 27, and a fourth diagonal brace 28, and both ends of the first diagonal brace 25 are connected to the first vertical frame 21 and the horizontal frame 23, respectively. Both ends of the second diagonal brace 26 are connected to the second stand 22 and the cross frame 23, respectively. The third diagonal braces 27 are two and mirror-symmetrical with respect to the first stand 21, and both ends of each of the two third diagonal braces 27 are connected to the first stand 21 and the base 1, respectively. The fourth diagonal braces 28 have two and mirror symmetry with respect to the second stand 22, and both ends of each of the two fourth diagonal braces 28 are respectively connected to the second stand 22 and the base 1.

Thereby, the first diagonal braces 25 serve to increase the strength and rigidity of the connection of the first stand 21 and the cross frame 23. The second diagonal braces 26 serve to increase the strength and rigidity of the connection of the second stand 22 and the cross frame 23. The third diagonal brace 27 serves to increase the strength and rigidity of the connection of the first stand 21 and the base 1. The fourth diagonal brace 28 is used to increase the strength and rigidity of the connection between the second stand 22 and the base 1. In addition, the design of the first diagonal bracing 25, the second diagonal bracing 26, the third diagonal bracing 27 and the fourth diagonal bracing 28 prolongs the service life of the draft tube overhauling lifting device.

Specifically, the two third diagonal braces 27 are mirror-symmetrical in the front-rear direction.

Specifically, the two fourth struts 28 are mirror-symmetrical in the front-rear direction.

Specifically, the first diagonal brace 25 and the first upright 21 may be connected by welding, bolting, riveting, or the like, and the first diagonal brace 25 and the cross frame 23 may be connected by welding, bolting, riveting, or the like.

Specifically, the second diagonal brace 26 and the second upright 22 may be connected by welding, bolting, riveting, or the like, and the second diagonal brace 26 and the cross frame 23 may be connected by welding, bolting, riveting, or the like.

Specifically, the third diagonal brace 27 and the first stand 21 may be connected by welding, bolting, riveting, or the like, and the third diagonal brace 27 and the base 1 may be connected by welding, bolting, riveting, or the like.

Specifically, the fourth diagonal brace 28 and the second upright 22 may be connected by welding, bolting, riveting, or the like, and the fourth diagonal brace 28 and the base 1 may be connected by welding, bolting, riveting, or the like.

In some embodiments, as shown in fig. 1, the draft tube service lift apparatus further includes a bail 61, a hoist rope 8, and a hook 81, the bail 61 being connected to the first end of the cable 6. The lifting ropes 8 are multiple and distributed at intervals in the circumferential direction of the lifting ring 61, and the first ends of the lifting ropes 8 form rope loops which are sleeved on the lifting ring 61. The number of the lifting hooks 81 and the number of the lifting ropes 8 are equal and correspond to each other one by one, the lifting hooks 81 are connected with the second ends of the corresponding lifting ropes 8, and the lifting hooks 81 are suitable for being matched on lifting lugs of a steel frame cage.

Therefore, the lifting hooks 81 are correspondingly matched with the lifting lugs of the steel frame cage, temporary connection of the cable 6 and the steel frame cage can be achieved, and the cable 6 can conveniently drive the steel frame cage to lift. In addition, due to the design of the lifting ropes 8 and the lifting hooks 81, the safety and stability of the steel frame cage are guaranteed, and the occurrence of operation accidents is reduced.

It will be appreciated that the sling may slide over the sling 61 in the circumferential direction of the sling 61.

It will be appreciated that after the plurality of hooks 81 cooperate with the plurality of lifting lugs, the plurality of loops converge at the bottom end of the lifting ring 61 under the weight of the steel frame cage.

Specifically, the draft tube overhauls elevating gear still includes the universal wheel, and the quantity of universal wheel has a plurality ofly and at the circumference interval distribution of base 1, and the axis direction of a plurality of universal wheels is unanimous, and every universal wheel is pivotably installed in the below of base 1.

Thereby, the universal wheel facilitates the movement and transportation of the base 1.

Preferably, the number of the universal wheels is four, and the four universal wheels are arranged at four corners of the base 1.

In summary, the draft tube overhauling lifting device provided by the embodiment of the utility model is portable and easy to carry, can be quickly assembled, is simple to operate, and meets the use requirements of short overhauling period and small space.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the utility model.

Claims (10)

1. Draft tube overhauls elevating gear, its characterized in that includes:

the base is detachably connected with the bracket, and the bracket is provided with an accommodating space;

a first pulley mounted on the top of the bracket adjacent to the receiving space;

the second pulley is arranged on the bracket and positioned at the edge of the top of the bracket, and the axes of the second pulley and the first pulley are consistent;

a winch, said winch being pivotally connected to said frame; and

the first end of the cable is arranged in the accommodating space and is suitable for hoisting the steel frame cage, the middle rope portion of the cable is sequentially arranged on the first pulley and the second pulley, and the second end of the cable is wound on the winch.

2. The draft tube service lift apparatus of claim 1 wherein said bracket includes:

the first stand is detachably arranged on the base and positioned on the first side of the base;

the second stand is detachably arranged on the base and positioned on the second side of the base, and the first stand and the second stand are opposite; and

the two ends of the transverse frame are respectively connected with the top end of the first vertical frame and the top end of the second vertical frame, the first vertical frame, the second vertical frame and the transverse frame enclose to form the accommodating space, the first pulley and the second pulley are both arranged on one side of the transverse frame, which deviates from the accommodating space, the second pulley is arranged on the first end of the transverse frame, and the winch is pivotably arranged on one side of the first vertical frame, which deviates from the accommodating space.

3. The draft tube overhauling lifting device according to claim 2, wherein the top of the transverse frame is provided with a guide rail extending in the length direction of the transverse frame, the first pulley is matched with the guide rail, the guide rail is provided with two limiting side walls opposite in the width direction of the guide rail, the limiting side walls are provided with guide grooves extending in the length direction of the guide rail, the first pulley is positioned between the two limiting side walls, the centers of two end surfaces of the first pulley are respectively provided with an axle, the two axles are in one-to-one correspondence with the two guide grooves, the axles are matched in the corresponding guide grooves, the limiting side walls are provided with a plurality of clamping grooves which are distributed at intervals in the length direction of the guide rail, the clamping grooves are positioned below the guide grooves and are communicated with the guide grooves, and each clamping groove is matched with the axle; the guide rail is provided with a limiting bottom wall extending in the width direction of the guide rail, the limiting bottom wall is connected with the bottom ends of the two limiting side walls, the limiting bottom wall is provided with a through groove extending in the length direction of the guide rail, and the middle rope portion of the mooring rope penetrates through the through groove.

4. The draft tube service lift apparatus of claim 2, wherein said draft tube service lift apparatus further comprises:

a support plate mounted to a side of the first stand facing away from the accommodating space, the support plate extending in a direction away from the accommodating space, the support plate having a first plate surface and a second plate surface opposite in a thickness direction thereof, the winch being pivotably mounted to the first plate surface;

the first gear is positioned at one side of the winch, which is away from the first plate surface, and the first gear is coaxially connected with the winch; and

the second gear is pivotally mounted on the first plate surface, the second gear is meshed with the first gear, and the second gear is smaller than the reference circle diameter of the first gear.

5. The draft tube service lift apparatus of claim 4, wherein said draft tube service lift apparatus further comprises:

the ratchet wheel is pivotally arranged on the second plate surface and is coaxially connected with the winch;

a pawl having a connecting end and a free end opposite in a length direction thereof, the connecting end being pivotally mounted to the second plate surface, the free end being engaged with the ratchet; and

and the elastic piece is connected with the pawl and the second plate surface so as to press the pawl on the ratchet wheel.

6. The draft tube service lifting device according to claim 5, further comprising a support shaft extending in a thickness direction of the support plate, the connection end being pivotably connected to the second plate surface through the support shaft, the elastic member comprising a torsion spring, the torsion spring being fitted over the support shaft, and both ends of the torsion spring being connected to the pawl and the second plate surface, respectively.

7. The draft tube service lift apparatus of claim 4, further comprising a stem, a first end of the stem being coupled to the second gear and a second end of the stem being adapted for gripping.

8. The draft tube service lift apparatus of claim 2, wherein said draft tube service lift apparatus further comprises:

the first bolts are multiple in number, and the bottom ends of the first vertical frames are connected with the base through the multiple first bolts; and

the number of the second bolts is multiple, and the bottom end of the second vertical frame is connected with the base through the multiple second bolts.

9. The draft tube service lift apparatus of claim 2, wherein said draft tube service lift apparatus further comprises:

the two ends of the first diagonal bracing are respectively connected with the first vertical frame and the transverse frame;

the two ends of the second diagonal bracing are respectively connected with the second vertical frame and the transverse frame;

the two ends of each of the two third inclined struts are respectively connected with the first vertical frame and the base; and

and the two ends of each of the two fourth inclined struts are respectively connected with the second vertical frame and the base.

10. The draft tube service lift apparatus of claim 1, wherein said draft tube service lift apparatus further comprises:

the hanging ring is connected with the first end of the mooring rope;

the lifting ropes are arranged in a plurality and are distributed at intervals in the circumferential direction of the lifting ring, the first ends of the lifting ropes form rope loops, and the rope loops are sleeved on the lifting ring; and

the lifting hooks are equal in number and correspond to the lifting ropes one by one, the lifting hooks are connected with the second ends of the corresponding lifting ropes, and the lifting hooks are suitable for being matched with lifting lugs of the steel frame lifting cage.