CN-118143637-B - Inner and outer cover compatible mechanism of spent fuel transport container bolt automatic loading and unloading machine

CN118143637BCN 118143637 BCN118143637 BCN 118143637BCN-118143637-B

Abstract

The invention relates to the field of automatic loading and unloading machines for spent fuel transport container bolts, in particular to an inner cover and outer cover compatible mechanism of an automatic loading and unloading machine for the spent fuel transport container bolts, which comprises a positioning base for connecting the transport container bolts, wherein a tightening mechanism for tightening the bolts is arranged on the positioning base, the tightening mechanism comprises a tightening shaft assembly, a supporting arm support and a deflection mechanism, the deflection mechanism is arranged on the supporting arm support, a linear guide rail is arranged on the supporting arm support, a linear guide groove matched with the linear guide rail is arranged on the tightening shaft assembly, and the deflection mechanism drives the tightening shaft assembly to enable the tightening shaft assembly to slide along the linear guide rail along with the linear guide rail. The inner cover and outer cover compatible mechanism of the spent fuel transport container bolt automatic loading and unloading machine can complete the positioning function and the bolt dismounting function of the inner cover and the outer cover through one set of equipment, improves the adaptability of the automatic loading and unloading machine, saves the cost, ensures the bolt tightening precision of the inner cover and the outer cover, and improves the production efficiency.

Inventors

QI ZHAOJUN
HUANG YUEJIN
HUANG YONGQIAN
MA DING
JING SHUNPING
LIN XUANMING
LIAO LIN

Assignees

大连德新机电技术工程有限公司

Dates

Publication Date: 20260508
Application Date: 20240430

Claims (7)

1. The internal and external cover compatible mechanism of the automatic loading and unloading machine for the spent fuel transport container bolts is characterized by comprising a positioning base used for connecting an inner cover or an outer cover of a transport container, wherein the positioning base is provided with a tightening mechanism used for tightening bolts, the tightening mechanism comprises a tightening shaft assembly, a supporting arm support and a displacement mechanism, the displacement mechanism is arranged on the supporting arm support, a linear guide rail is arranged on the supporting arm support, a linear guide groove matched with the linear guide rail is arranged on the tightening shaft assembly, and the displacement mechanism drives the tightening shaft assembly to enable the tightening shaft assembly to slide along the linear guide rail; the tightening shaft assembly comprises a mounting frame, a motor unit, tightening sleeves and two counterforce sleeves, wherein the motor unit is fixed on the mounting frame, the output end of the motor unit is connected with the tightening sleeves, the two counterforce sleeves are respectively arranged on two sides of the tightening sleeves, the linear guide groove is arranged on the mounting frame, the mounting frame is in sliding connection with the supporting arm support, and the motor unit, the tightening sleeves and the two counterforce sleeves are driven to synchronously move; The mounting rack is characterized in that a circular assembly cavity is arranged in the center of the mounting rack, an upper support and a lower support are arranged in the assembly cavity, connecting holes are formed in the mounting rack, connecting pin shafts assembled with the connecting holes are respectively arranged on the upper support and the lower support, and the connecting pin shafts are fixed with the mounting rack through connecting components; the mounting frame, the upper support and the lower support are respectively provided with a pin bush at the same side, pin holes are formed in the pin bushes, the pin holes on the mounting frame, the upper support and the lower support are communicated and are provided with pluggable bolts, when the screwing sleeve acts on the inner cover to be screwed, the bolts are pulled out, the mounting frame, the upper support and the lower support are separated, the counter-force sleeve acts, when the screwing sleeve acts on the outer cover to be screwed, the bolts are inserted, the mounting frame, the upper support and the lower support are connected into a whole through the bolts, and the counter-force sleeve does not act.
2. The compatible mechanism for the inner cover and the outer cover of the automatic loading and unloading machine for the spent fuel transport container bolts, which is disclosed in claim 1, is characterized in that the displacement mechanism comprises two sets of screw rod supporting seats, a screw rod, a screw nut and a hand wheel, wherein the two sets of screw rod supporting seats are fixed on a supporting arm frame, the screw rod is rotationally connected between the two sets of screw rod supporting seats, the hand wheel is connected with the screw rod and drives the screw rod to rotate, the screw nut is connected with the screw nut in a threaded manner, and the screw nut is fixed with the tightening shaft assembly and drives the tightening shaft assembly to slide along the linear guide rail.
3. The mechanism of claim 1, wherein the support arm frame is provided with scale marks for displaying the positions of the tightening shaft assemblies, the support arm frame is also provided with an outer positioning hole and an inner positioning hole, the outer positioning hole or the inner positioning hole is internally provided with a positioning pin for positioning the tightening shaft assemblies, the outer positioning hole corresponds to the positioning of the tightening shaft assemblies when the outer cover bolts are acted, and the inner positioning hole corresponds to the positioning of the tightening shaft assemblies when the inner cover bolts are acted.
4. The mechanism of claim 1, wherein the number of the tightening shaft assemblies is three, the three tightening shaft assemblies are distributed at intervals of 120 degrees, the three tightening shaft assemblies are distributed on an equal-diameter indexing circle, and each tightening shaft assembly is radially variable in distance along the linear guide rail through a corresponding displacement mechanism.
5. The mechanism of claim 4 wherein the support arm comprises three arms corresponding to the tightening shaft assembly, wherein one ends of the three arms away from the tightening shaft assembly are integrated into a connecting assembly of the support arm, the connecting assembly of the support arm is connected to the positioning base through a lifting mechanism, and the lifting mechanism drives the support arm and the tightening shaft assembly to lift.
6. The mechanism of claim 1, wherein the positioning base is arranged above the inner cover or the outer cover, the positioning base is provided with a positioning block in a telescopic manner and positioned by an inner cover limiting pin or an outer cover limiting pin, and the positioning block is connected with the positioning base by a bolt and supported by a jackscrew.
7. The mechanism for compatible inner and outer covers of an automatic loading and unloading machine for spent fuel transport container bolts according to claim 1 or 6, wherein the positioning base is of a rectangular structure, supporting feet are respectively arranged at four corners of the positioning base in a hanging mode, a positioning block is connected below the supporting feet, an inner cover limiting pin hole and an outer cover limiting pin hole for fixing the positions of the positioning blocks are arranged on the supporting feet, an inner cover limiting pin hole and an outer cover limiting pin hole which correspond to the supporting feet are also arranged on the positioning block, the inner cover limiting pin hole of the supporting feet and the inner cover limiting pin hole of the positioning block are positioned through inner cover limiting pins, the outer cover limiting pin hole of the supporting feet and the outer cover limiting pin hole of the positioning block are positioned through outer cover limiting pins, the outer surface shapes of the inner cover limiting pin outer surface and the outer cover limiting pin positioning outer surface are different, the inner cover limiting pin hole and the outer cover limiting pin hole cannot be commonly used, connecting holes matched with inner/outer cover lifting holes are formed in the end portions of the positioning blocks, the positioning blocks move inwards to retract, the connecting holes of the positioning blocks are fixedly connected with the inner cover lifting holes of the positioning blocks, the outer cover limiting pin holes of the positioning blocks are outwards moved and extend out of the outer cover limiting pin holes of the positioning blocks.

Description

Inner and outer cover compatible mechanism of spent fuel transport container bolt automatic loading and unloading machine Technical Field The invention relates to the field of automatic loading and unloading machines for spent fuel transportation container bolts, in particular to an inner cover and outer cover compatible mechanism of an automatic loading and unloading machine for spent fuel transportation container bolts. Background At present, NAC-STC containers are used by uranium industry companies for transporting spent fuel, and the NAC-STC containers are stainless steel lead screen containers with weights of 114 t, and the containers consist of a body, a hanging basket, an inner cover, an outer cover and the like. The inner cover and the outer cover of the container are respectively connected with the upper forge piece through bolts, and because the difference of the distribution circle sizes of the bolts of the inner cover and the outer cover is relatively large, the common mode is to adopt two sets of different equipment to respectively solve the problem of screwing the bolts of the inner cover and the outer cover, the screwing requirements of the bolts of the inner cover and the outer cover are respectively met, the cost is too high, in addition, the special characteristics of the sealing cover and the disassembling cover process of the spent fuel container are adopted, the inner cover and the outer cover equipment are generally used at the same time and are also transported to different sites together with the container for use, so if the inner cover and the outer cover are used, the two sets of equipment are used, but the practical use is inconvenient. Disclosure of Invention According to the defects of the prior art, the invention aims to solve the problem of compatibility of the inner cover and the outer cover of the automatic loading and unloading machine of the spent fuel transportation container bolt, and realize the purpose that one device is used as two devices. The technical scheme includes that the inner cover compatible mechanism and the outer cover compatible mechanism of the automatic loading and unloading machine for the spent fuel transport container bolts comprise a positioning base used for connecting the transport container bolts, a tightening mechanism used for tightening the bolts is arranged on the positioning base, the tightening mechanism comprises a tightening shaft assembly, a supporting arm support and a deflection mechanism, the deflection mechanism is arranged on the supporting arm support, a linear guide rail is arranged on the supporting arm support, a linear guide groove matched with the linear guide rail is arranged on the tightening shaft assembly, and the deflection mechanism drives the tightening shaft assembly to enable the tightening shaft assembly to slide along the linear guide rail. The device comprises a linear guide rail, a screw rod supporting seat, a screw nut, a hand wheel and a shifting mechanism, wherein the screw rod supporting seat is fixed on the support arm frame, the screw rod is connected between the screw rod supporting seats in a rotating mode, the hand wheel is connected with the screw rod and drives the screw rod to rotate, the screw nut is connected with the screw rod in a threaded mode, and the screw nut is fixed with the tightening shaft assembly and drives the tightening shaft assembly to slide along the linear guide rail. The screw rod, the nut and the hand wheel jointly form a driving device for sliding of the tightening shaft assembly. Further, scale marks for displaying the positions of the screwing shaft assemblies are arranged on the supporting arm frame, an outer positioning hole and an inner positioning hole are further formed in the supporting arm frame, positioning pins for positioning the screwing shaft assemblies are arranged in the outer positioning hole or the inner positioning hole, the outer positioning hole corresponds to the positioning of the screwing shaft assemblies when the outer cover bolts are acted, and the inner positioning hole corresponds to the positioning of the screwing shaft assemblies when the inner cover bolts are acted. Further, the outer positioning hole and the inner positioning hole are formed in the support arm frame, a positioning hole is formed in the tightening shaft assembly, and the positioning hole in the tightening shaft assembly is aligned with the outer positioning hole or the inner positioning hole in the support arm frame and then positioned through the positioning pin. Further, three tightening shaft assemblies are distributed at intervals of 120 degrees and distributed on an equal-diameter dividing circle, and each tightening shaft assembly radially changes the distance along the linear guide rail through a corresponding displacement mechanism. Further, the support arm frame comprises three cantilever frames corresponding to the tightening shaft assemblies, one ends of the three cantile