Directional self-weight fixing sling

Abstract

The present application relates to the technical field of article transfer tool equipment in radiation environment, and solves the technical problem that the spreader cannot work stably in radiation and electromagnetic interference environment in the prior art. A fixed direction self-weight spreader comprises a pin shaft matched with an article to be hoisted and a driving mechanism for driving the pin shaft to reciprocate along a horizontal direction to lock or release the article to be hoisted. The power converter comprises a crankshaft, the crankshaft drives the pin shaft to reciprocate, the self-weight driver comprises a rack, the power converter further comprises a gear meshed with the rack, and the power converter further comprises a ratchet mechanism, the ratchet mechanism comprises a ratchet disc mounted on the crankshaft and a pawl mounted on the gear. The above working process adopts a pure mechanical transmission mode to make the pin shaft extend or retract to hang or release the article to be hoisted. The spreader disclosed in the present application has no electronic components and can work stably in a radiation and electromagnetic interference environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of article transfer tool equipment in a radiation environment, and in particular to a fixed direction self-weight lifting device. BACKGROUND

[0002] Nuclear fuel storage racks are core equipment in nuclear fuel cycle, and are widely used in spent fuel storage in reactor, intermediate storage out of reactor and storage in reprocessing plant. In recent years, with large-scale construction of nuclear power units in China, the demand for nuclear fuel storage racks is very large, and therefore, the localization research of nuclear fuel storage racks has important significance for reducing procurement costs and promoting the construction of nuclear power engineering projects in China.

[0003] A nuclear fuel storage rack is composed of dozens to hundreds of hollow square tube storage sleeves, and not only requires strict control of the spacing between each storage sleeve and the verticality to the bottom plate, but also requires strict installation sequence to be executed. In the assembly process, the storage sleeves need to be kept in a vertical state, and the traditional method is to tie the sleeves at one end with a hemp rope, slowly hoist upwards, and personnel need to support the bottom at any time, which is low in work efficiency and has great safety hazards.

[0004] For an environment with radiation and electromagnetic interference, a conventional lifting device cannot be used in the environment. For example, to make the lifting device more stable, the conventional lifting device usually needs electronic components to lock the lifting device after the lifting device is locked with the article to be lifted, and the electronic components are easily affected by radiation and electromagnetic interference, thereby reducing the stability. Therefore, the conventional lifting device cannot be used in the environment. SUMMARY

[0005] The fixed direction self-weight lifting device provided by the present application solves the technical problem that the lifting device in the prior art cannot work stably in a radiation and electromagnetic interference environment.

[0006] Some embodiments to solve the above technical problems include:

[0007] A fixed direction self-weight lifting device includes a pin shaft matched with an article to be lifted and a driving mechanism for driving the pin shaft to reciprocate in a horizontal direction to lock or release the article to be lifted, the driving mechanism including a self-weight driver reciprocating in a vertical direction and a power converter converting the reciprocating movement of the self-weight driver in the vertical direction into the reciprocating movement of the pin shaft in the horizontal direction.

[0008] The power converter includes a crankshaft driving the pin shaft to reciprocate, the self-weight driver includes a rack, the power converter further includes a gear meshing with the rack, the gear converting the linear motion of the rack into the rotary motion of the gear, and the power converter further includes a ratchet mechanism including a ratchet disc installed on the crankshaft and a pawl installed on the gear.

[0009] The rack drives the gear to rotate in a first direction, the pawl drives the crankshaft to rotate through the ratchet disc, the rack drives the gear to rotate in a second direction, the pawl slides relative to the ratchet disc, and the first direction is opposite to the second direction.

[0010] In practical application, when the rack moves downward in the vertical direction, the rack drives the gear to rotate 180°, the gear drives the pawl to rotate 180°, the pawl drives the ratchet disc to rotate 180°, and then the ratchet disc drives the crankshaft to rotate 180°, and the crankshaft drives the pin shaft to move a certain distance in the horizontal direction, forming the first horizontal movement of the pin shaft.

[0011] When the rack moves upward in the vertical direction, the rack drives the gear to rotate 180° in the opposite direction, the rack drives the pawl to rotate 180°, in this process, the pawl slides relative to the ratchet disc, the pawl does not drive the ratchet disc to rotate, so the crankshaft does not rotate, and the pin shaft does not move horizontally.

[0012] When the rack moves downward in the vertical direction again, the rack drives the gear to rotate 180°, the gear drives the pawl to rotate 180°, the pawl drives the ratchet disc to rotate 180°, and then the ratchet disc drives the crankshaft to rotate 180°, and the crankshaft drives the pin shaft to move a certain distance in the horizontal direction, forming the second horizontal movement of the pin shaft. The direction of the first horizontal movement is opposite to that of the second horizontal movement, and the stroke is equal.

[0013] The driving force of the upward movement of the rack can be provided by a hoisting device, and the acting force of the downward movement of the rack is provided by the gravity of the rack itself.

[0014] The above working process adopts a pure mechanical transmission mode to make the pin shaft extend or retract to hang or release the to-be-lifted object. The lifting device disclosed by the application does not have electronic elements and can work stably in a radiation and electromagnetic interference environment.

[0015] Preferably, the two ends of the crankshaft are respectively provided with gears, and each gear is engaged with an independent rack.

[0016] In this scheme, the two ends of the crankshaft are respectively provided with gears, and each gear is engaged with an independent rack. The rack is a prime mover, so that the crankshaft is uniformly stressed.

[0017] Preferably, the ratchet disc and the crankshaft are fixed together through a key.

[0018] In this scheme, the connection strength between the ratchet disc and the crankshaft is high, and the power transmission efficiency between the ratchet disc and the crankshaft is high.

[0019] In an optimization scheme, the gear is provided with a toothed disc that rotates synchronously with the gear, and the pawl is installed on the toothed disc.

[0020] The present scheme is provided by setting the toothed disc, the pawl is installed on the toothed disc, the position of the pawl relative to the ratchet disc can be changed by changing the size of the diameter of the toothed disc, and then the size of the force arm of the force applied to the ratchet disc is changed, and the performance of the lifting appliance is optimized.

[0021] As preferred, the pin shaft has two, the two pin shafts are coaxially arranged and the movement directions are opposite, and each pin shaft is driven by an independent driving mechanism.

[0022] In the present scheme, two pin shafts are used to cooperate with the object to be lifted, the connection strength between the pin shaft and the object to be lifted is high, and the stress of the object to be lifted and the pin shaft is uniform.

[0023] As preferred, the end of the two pin shafts close to each other is provided with a notch, and the notches on the two pin shafts cooperate to form a matching groove matched with the object to be lifted.

[0024] In the present scheme, the notch is mainly used to cooperate with the lifting structure of the object to be lifted by setting the notch on the pin shaft, and the positioning accuracy of the pin shaft to the object to be lifted is improved.

[0025] As preferred, the fixed direction self-weight lifting appliance further comprises a mounting plate, and the crankshaft is rotationally connected to the mounting plate.

[0026] In the present scheme, the mounting plate is mainly used to support the crankshaft, the crankshaft has high displacement accuracy, and the stability of the driving mechanism during operation is improved.

[0027] An optimization scheme, the fixed direction self-weight lifting appliance further comprises a mounting plate, the mounting plate has two, the crankshaft is rotationally connected to the mounting plate, and the same end of the two crankshafts is installed on the same mounting plate.

[0028] In the present scheme, the same end of the two crankshafts is supported by the same mounting plate, the structure of the lifting appliance is simplified, and the manufacturing cost of the lifting appliance is reduced.

[0029] As preferred, the upper end of the mounting plate is provided with a lifting appliance intermediate plate, and the lower end of the mounting plate is provided with an inclined surface, and the inclined surface forms a guide groove for guiding the object to be lifted.

[0030] In the present scheme, the lifting appliance intermediate plate can effectively position the mounting plate by setting the lifting appliance intermediate plate. At the same time, the lifting appliance intermediate plate also plays a supporting function of the pin shaft. The pin hole matched with the pin shaft is arranged on the lifting appliance intermediate plate. The pin shaft has high displacement accuracy.

[0031] As preferred, the top plate is arranged above the lifting appliance intermediate plate, the top plate reciprocates along the vertical direction relative to the lifting appliance intermediate plate, the top plate is provided with a peripheral plate, and the rack is installed on the peripheral plate.

[0032] In the scheme, the top plate can be conveniently connected with the hoisting equipment by setting the top plate. Meanwhile, the top plate increases the weight of the peripheral plate, so that the peripheral plate has a relatively heavy weight. The rack is installed on the peripheral plate, and the rack moves downward with high precision under the action of gravity, and the rack will not be stuck.

[0033] As a preferred, a guide shaft is arranged between the top plate and the hoist intermediate plate to guide the top plate.

[0034] In the scheme, the guide shaft is arranged to improve the displacement precision of the top plate and the peripheral plate. Furthermore, the displacement precision of the rack is improved.

[0035] As a preferred, the guide shaft is arranged on the top plate, and the hoist intermediate plate is provided with a guide hole matched with the guide shaft.

[0036] In the scheme, the top plate has high displacement precision, and the guide hole is arranged on the hoist intermediate plate, so that the top plate is easy to be connected with the hoisting equipment. The hoisting device has a relatively small size.

[0037] In an alternative scheme, the guide shaft is arranged on the hoist intermediate plate, and the top plate is provided with a guide hole matched with the guide shaft.

[0038] In the scheme, the top plate is easy to process.

[0039] Compared with the prior art, the fixed direction self-weight hoist has the following advantages:

[0040] In the practical application process: when the rack moves downward along the vertical direction, the rack drives the gear to rotate 180°, the gear drives the pawl to rotate 180°, the pawl drives the ratchet disc to rotate 180°, and then the ratchet disc drives the crankshaft to rotate 180°, and the crankshaft drives the pin shaft to move a certain distance along the horizontal direction, forming the first horizontal movement of the pin shaft.

[0041] When the rack moves upward along the vertical direction, the rack drives the gear to rotate 180° in the opposite direction, and the rack drives the pawl to rotate 180°. In this process, the pawl slides relative to the ratchet disc, and the pawl does not drive the ratchet disc to rotate, so that the crankshaft does not rotate, and the pin shaft moves horizontally.

[0042] When the rack moves downward along the vertical direction again, the rack drives the gear to rotate 180°, the gear drives the pawl to rotate 180°, the pawl drives the ratchet disc to rotate 180°, and then the ratchet disc drives the crankshaft to rotate 180°, and the crankshaft drives the pin shaft to move a certain distance along the horizontal direction, forming the second horizontal movement of the pin shaft. The direction of the first horizontal movement and the second horizontal movement is opposite, and the stroke is equal.

[0043] The working process adopts a pure mechanical transmission mode to make the pin shaft extend or retract to hang or release the object to be lifted. The lifting device disclosed by the application does not have electronic components and can work stably in a radiation and electromagnetic interference environment.

[0044] The object to be lifted is provided with a lifting lug matched with the pin shaft. The lifting lug is in a U shape with an opening facing downward, so that the pin shaft can conveniently enter the lifting lug and be matched with the lifting lug.

[0045] The fixed direction self-weight lifting device refers to that the object to be lifted has a specific orientation when being lifted or placed. Usually, the object to be lifted is provided with a lifting lug. When the lifting device is assembled with the lifting lug, assembly can be performed only from one side or both sides of the lifting lug relative to the two sides, so that the object to be lifted has a specific orientation when being lifted or placed. BRIEF DESCRIPTION OF DRAWINGS

[0046] For the purpose of explanation, several embodiments of the present technology are set forth in the following drawings. The following drawings are incorporated into this text and form part of the specific embodiments. In some cases, well-known structures and components are shown in block diagram form in order to avoid obscuring the concepts of the subject technology.

[0047] Figure 1 It is a schematic diagram of the internal structure of the application, Figure 1 One peripheral plate and one plate body connected with the peripheral plate are omitted.

[0048] Figure 2 It is a schematic diagram of the internal structure of the application, Figure 2 One peripheral plate and two plate bodies connected with the peripheral plate are omitted.

[0049] Figure 3 It is Figure 2 It is a schematic diagram of one side of the application. Figure 3 One pin shaft and a driving mechanism for driving the pin shaft are further omitted.

[0050] Figure 4 It is a front view of the internal structure of the application.

[0051] Figure 5 It is a schematic diagram of the contact of the two pin shafts.

[0052] Figure 6 It is a schematic diagram of the lifting structure matched with the pin shaft in the object to be lifted.

[0053] In the figure:

[0054] 1, pin shaft, 11, notch.

[0055] 2. driving mechanism, 21. self-weight driver, 211. rack, 22. power converter, 221. crankshaft, 222. gear, 2221. toothed disc, 23. ratchet mechanism, 231. ratchet disc, 232. pawl.

[0056] 3. mounting plate, 31. sling intermediate plate, 32. guide slot.

[0057] 4. top plate, 41. peripheral plate, 42. guide shaft. DETAILED DESCRIPTION

[0058] The specific embodiments shown are intended to be illustrative only and not restrictive of the subject technology as contemplated by the present application. The specific embodiments include particular details for the purpose of providing a thorough understanding of the subject technology. However, it will be apparent to those skilled in the art that the subject technology can be practiced without these specific details.

[0059] It is apparent that the terms "first", "second" in the present text are only for the purpose of distinguishing the respective features and are not intended to limit the number of the respective features.

[0060] SUMMARY Figures 1 to 6 As shown in the drawings, a fixed-direction self-weight sling includes a pin shaft 1 matched with an object to be hoisted and a driving mechanism 2 driving the pin shaft 1 to reciprocate along a horizontal direction to lock or release the object to be hoisted, the driving mechanism 2 including a self-weight driver 21 reciprocating along a vertical direction and a power converter 22 converting the reciprocating movement of the self-weight driver 21 along the vertical direction into the reciprocating movement of the pin shaft 1 along the horizontal direction.

[0061] The power converter 22 includes a crankshaft 221 driving the pin shaft 1 to reciprocate, the self-weight driver 21 including a rack 211, the power converter 22 further including a gear 222 engaged with the rack 211, the gear 222 converting the linear movement of the rack 211 into the rotational movement of the gear 222, the power converter 22 further including a ratchet mechanism 23 including a ratchet disc 231 mounted on the crankshaft 221 and a pawl 232 mounted on the gear 222.

[0062] The rack 211 moving along a first direction drives the gear 222 to rotate, the pawl 232 driving the crankshaft 221 to rotate through the ratchet disc 231, the rack 211 moving along a second direction drives the gear 222 to rotate, the pawl 232 sliding relative to the ratchet disc 231, the first direction being opposite to the second direction.

[0063] The crankshaft 221 and the pin shaft 1 form a crank slider mechanism to convert the rotary motion of the crankshaft 221 into the linear motion of the pin shaft 1.

[0064] For example, the crankshaft 221 can be directly matched with the pin shaft 1, for example, a special-shaped hole can be arranged on the pin shaft 1 to convert the rotary motion of the crankshaft 221 into the linear motion of the pin shaft 1. The special-shaped hole is usually long strip-shaped to compensate for the space required when the crankshaft 221 rotates.

[0065] The crankshaft 221 and the pin shaft 1 can also be provided with a connecting rod, one end of the connecting rod is rotatably connected with the pin shaft 1, and the other end of the connecting rod is rotatably connected with the crankshaft 221.

[0066] Since the displacement length of the pin shaft 1 is small, the special-shaped hole scheme can meet the use requirement, and when the special-shaped hole scheme is adopted, the specific volume of the lifting device is small, and the application range is wide.

[0067] In one or more embodiments, the two ends of the crankshaft 221 are respectively provided with gears 222, and each gear 222 is engaged with an independent rack 211.

[0068] The ratchet disc 231 and the crankshaft 221 are fixed together through a key connection;

[0069] Alternatively, the gear 222 is provided with a toothed disc 2221 that rotates synchronously with the gear 222, and the pawl 232 is installed on the toothed disc.

[0070] The diameter of the toothed disc can be greater than the diameter of the gear 222 to lengthen the force arm of the pawl 232, and the rack 211 does not need too much power when it is displaced. The diameter of the toothed disc is not limited and can be reasonably designed according to the needs.

[0071] The toothed disc can be an integral structure with the rack 211.

[0072] In one or more embodiments, the pin shaft 1 has two coaxial pin shafts 1 with opposite movement directions, and each pin shaft 1 is driven by an independent driving mechanism 2.

[0073] The two pin shafts 1 are provided with notches 11 at one end close to each other, and the notches 11 on the two pin shafts 1 cooperate to form a matching groove matched with the object to be lifted.

[0074] In one or more embodiments, the fixed direction self-weight lifting device further comprises a mounting plate 3, and the crankshaft 221 is rotatably connected to the mounting plate 3.

[0075] Or, the fixed direction self-weight lifting device further comprises two mounting plates 3, the crank shaft 221 is rotatably connected to the mounting plates 3, and the same end of the two crank shafts 221 is mounted to the same mounting plate 3.

[0076] Rolling bearings can be arranged between the crank shaft 221 and the mounting plate 3.

[0077] In one or more embodiments, the upper end of the mounting plate 3 is provided with a lifting device intermediate plate 31, and the lower end of the mounting plate 3 is provided with a slope forming a guide groove 32 guiding the object to be lifted.

[0078] The lifting device intermediate plate 31 is provided with a pin hole matched with the pin shaft 1. The pin hole is in sliding connection with the pin shaft 1.

[0079] In a specific embodiment, the lifting device intermediate plate 31 comprises a vertical plate and a horizontal plate perpendicular to the vertical plate, and the horizontal plate and the vertical plate are in an integral structure. The pin hole is arranged on the vertical plate.

[0080] In a specific embodiment, the lifting device intermediate plate 31 is vertically arranged.

[0081] In one or more embodiments, the lifting device intermediate plate 31 is provided with a top plate 4 above the lifting device intermediate plate 31, the top plate 4 reciprocates in the vertical direction relative to the lifting device intermediate plate 31, the top plate 4 is provided with a peripheral plate 41, and the rack 211 is mounted on the peripheral plate 41. The rack 211 can be fixed to the peripheral plate 41 by screws.

[0082] The peripheral plate 41 can be fixed to the top plate 4 by screws.

[0083] In one or more embodiments, a guide shaft 42 guiding the top plate 4 is arranged between the top plate 4 and the lifting device intermediate plate 31.

[0084] The guide shaft 42 is arranged on the top plate 4, the lifting device intermediate plate 31 is provided with a guide hole matched with the guide shaft 42; and the guide shaft 42 can be in an integral structure with the top plate 4.

[0085] Or, the guide shaft 42 is arranged on the lifting device intermediate plate 31, and the top plate 4 is provided with a guide hole matched with the guide shaft 42. The guide shaft 42 can be in an integral structure with the lifting device intermediate plate 31.

[0086] The guide shaft 42 can be provided with a limiting block limiting the displacement stroke of the top plate 4 relative to the lifting device intermediate plate 31, and the diameter of the limiting block is greater than the diameter of the guide hole. The limiting block interferes with the top plate 4 or the lifting device intermediate plate 31 to limit the displacement stroke of the top plate 4.

[0087] The above describes the subject technical solutions of the present application and corresponding details. It should be understood that the above description is only some embodiments of the subject technical solutions of the present application, and some details can be omitted during implementation.

[0088] In addition, in some embodiments of the above application, multiple embodiments can be combined for implementation, and various combination solutions are not listed one by one due to the length of the article. Those skilled in the art can freely combine the above embodiments according to the needs during implementation to obtain a better application experience.

[0089] Those skilled in the art can obtain other detailed configurations or drawings during implementation of the subject technical solutions of the present application according to the subject technical solutions of the present application and the drawings. Obviously, these details still belong to the scope covered by the subject technical solutions of the present application without departing from the subject technical solutions of the present application.

Claims

1. A deadweight sling with a fixed direction, characterized by: The invention comprises a pin shaft (1) cooperating with an object to be lifted and a driving mechanism (2) for driving the pin shaft (1) to reciprocate in a horizontal direction to lock or release the object to be lifted, wherein the driving mechanism (2) comprises a self-weight driver (21) that reciprocates in a vertical direction and a power converter (22) that converts the reciprocating motion of the self-weight driver (21) in the vertical direction into the reciprocating motion of the pin shaft (1) in the horizontal direction; The power converter (22) includes a crankshaft (221), the crankshaft (221) drives the pin shaft (1) to reciprocate, the deadweight driver (21) includes a rack (211), the power converter (22) also includes a gear (222) meshed with the rack (211), the gear (222) converts the linear motion of the rack (211) into the rotational motion of the gear (222), and the power converter (22) also includes a ratchet mechanism (23), the ratchet mechanism (23) includes a ratchet plate (231) mounted on the crankshaft (221) and a ratchet pawl (232) mounted on the gear (222); The rack (211) moves in a first direction to drive the gear (222) to rotate, and the pawl (232) drives the crankshaft (221) to rotate through the ratchet disk (231). The rack (211) moves in a second direction to drive the gear (222) to rotate, and the pawl (232) slides relative to the ratchet disk (231), and the first direction is opposite to the second direction. Gears (222) are respectively provided at both ends of the crankshaft (221), and each gear (222) is meshed with an independent rack (211); The ratchet disc (231) and the crankshaft (221) are fixed together via a key connection; Alternatively, the gear (222) is provided with a toothed disc that rotates synchronously with the gear (222), and the pawl (232) is mounted on the toothed disc; There are two pin shafts (1), the two pin shafts (1) are coaxially arranged and move in opposite directions, and each pin shaft (1) is driven by an independent driving mechanism (2); A notch (11) is provided at one end of the two pin shafts (1) close to each other, and the notches (11) on the two pin shafts (1) cooperate to form a matching groove for matching with the object to be lifted; The fixed-direction deadweight sling further comprises a mounting plate (3), and the crankshaft (221) is rotatably connected to the mounting plate (3); Alternatively, the fixed-direction deadweight sling further comprises a mounting plate (3), wherein the mounting plates (3) are two, the crankshaft (221) is rotatably connected to the mounting plates (3), and the same end of the two crankshafts (221) is mounted on the same mounting plate (3); The upper end of the mounting plate (3) is provided with a sling intermediate plate (31), and the lower end of the mounting plate (3) is provided with an inclined surface, wherein the inclined surface forms a guide groove (32) for guiding the object to be lifted; A top plate (4) is provided above the intermediate plate (31) of the sling, and the top plate (4) reciprocates in a vertical direction relative to the intermediate plate (31) of the sling. The top plate (4) is provided with an outer plate (41), and the rack (211) is mounted on the outer plate (41); A guide shaft (42) for guiding the top plate (4) is provided between the top plate (4) and the intermediate plate (31) of the sling; The guide shaft (42) is provided on the top plate (4), and the intermediate plate (31) of the sling is provided with a guide hole that matches the guide shaft (42); Alternatively, the guide shaft (42) is provided on the intermediate plate (31) of the sling, and the top plate (4) is provided with a guide hole that cooperates with the guide shaft (42).

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