CN201979279U

CN201979279U - Underwater screw fastener

Info

Publication number: CN201979279U
Application number: CN2010206500535U
Authority: CN
Inventors: 马明泽; 陈梁; 何少华; 王宇晗; 张继革
Original assignee: Qinshan Nuclear Power Co Ltd
Current assignee: Qinshan Nuclear Power Co Ltd
Priority date: 2010-12-09
Filing date: 2010-12-09
Publication date: 2011-09-21
Anticipated expiration: 2020-12-09

Abstract

The utility model relates to a fastener, which comprises two long connecting rods; a connecting pin is inserted in a connecting sleeve to fix the two long connecting rods; a gear worm transmission mechanism composed of a transmission worm and a worm wheel is disposed in a box; one end of the worm is extended upward outside the box and connected with a long handle tool joint; the shaft of the worm wheel is extended out from the box and connected with the piston rod of a hydraulic cylinder; a hydraulic drive oil cylinder is fixed on the right side of a base; two pairs of slide blocks are disposed on the bottom of the box, and can move left and right along a guide rail together with the box; the guide rail is fixed on the base; both sides of the base are respectively provided with a long handle tool joint. The utility model has the following beneficial effects: (1) the fastener can mount and fasten bolts to an underwater nuclear power installation conveniently and reliably; (2) by using a worm gear mechanism as the drive mechanism, the fastener achieves the advantages of self-locking function, compact structure and laborsaving, compared with that using a gear drive mechanism; (3) because the worm gear has a large transmission ratio, the fastener can realize micro feeding and is easily controlled manually.

Description

A kind of threaded fastening device under water

Technical field

The utility model belongs to a kind of fastener, be specifically related to a kind of compact conformation, laborsaving, be easy to manual control, can realize the device for screwing up of screw thread under water of small feeding.

Background technology

In nuclear power plant, a lot of nuclear power generating equipments need overhaul or change after the operation of certain hour them, and the securing member of fixing these equipment mostly is bolt greatly.Under the general job environment, tighting a bolt is a very simple thing, but because the residing specific condition of nuclear power generating equipment, particularly be in mostly under the environment of high dose nuclear radiation at the equipment in the refuelling pool, the installation and removal of these equipment are that the maintenance personal can't closely operate for a long time, that is to say that the maintenance personal can't dive beneath the water for a long time operates, and therefore the personnel that need repairing dismantle equipment under water by operating some isolated plants on the coast.The work of construction bolt under water comprises bolt from the transmission to the underwater operation zone waterborne, the underwater location of bolt, and bolt contacts bolt hole under water up to links such as being screwed into, tightening.This has just proposed very high requirement for the maintenance of underwater installation, particularly big or hour in the moment that just contacts bolt hole for diameter of bolt size, need feeding more slowly, promptly to conveniently control feeding or be easy to realize the adjusting of small feeding, to increase the reliability and stability of feeding.

(patent No.: the technical scheme in utility model patent ZL200920167476.9) is: a kind of threaded fastening device under water comprises that long handle tool-joint, top have the bolt collar that bolt collar that the bolt collar joint of keyway, coaxial T type gear, the oil cylinder that surges, guide rail, draw-in groove, connecting rod, construction bolt use and fastening bolt are used " threaded fastening device under water "; The coaxial T generating gear that is fixed on the axle is connected with bolt collar joint Vertical Meshing, and with a square housing it is covered, but the bolt collar joint stretches out housing; The upper end of coaxial T generating gear is stretched out the top of housing and is connected with the long handle tool-joint; The bottom of housing is connecting two pairs of draw-in grooves, and draw-in groove is stuck on the pair of guide rails that is located on the pedestal; The right side of housing is connected with the oil cylinder that surges that is fixed on the pedestal right side by connecting rod; The left end of two kinds of bolt collars is all opened a columniform groove that is complementary with the bolt collar joint, and offer a rectangle keyway same with the bolt collar joint in a side of this groove, the bolt collar joint all can connect two bolt collars by a key, and holds out against with pin.The deficiency of this scheme is: when needing small feeding slowly when the diameter of thread when less or big, in order to realize small feeding, then gear ratio will be increased, it is big to make the gear housing physical dimension like this, not compact, Heavy Weight; This organization plan, because the long handle instrument is not only thin but also long, deflection is bigger, can not self-locking, small feeding operation is wayward, easily produces unstable in the time will being screwed into; When the diameter of bolt is big, tighten effort.

Summary of the invention

The purpose of this utility model provide a kind of simple and compact for structure, volume is little, easy to operate, be easy to the device for screwing up of screw thread under water of controlling, having auto-lock function, can realize little feeding.

The utility model is to realize like this, a kind of threaded fastening device under water, it comprises long connecting rod, connecting pin is inserted on the adapter sleeve two long connecting rods is fixed together, the Worm and worm-wheel gearing that is made of the transmission worm and worm wheel is installed in the casing, the end of worm screw protrudes upward outside the casing and is connected with the long handle tool-joint, the shaft extension of worm gear goes out casing and is connected with the piston rod of hydraulic cylinder, the oil cylinder that surges is fixed on the base right side, the bottom of casing is provided with two pairs of slide blocks, slide block can be with casing along the guide rail move left and right, and guide rail is fixed on the base, and the both sides of base are respectively equipped with the long handle tool-joint.

Described worm and wheel Vertical Meshing.

The end of worm screw is with protective sleeve outward, and protective sleeve is fixed on the casing top.

The beneficial effects of the utility model: (1) can be easily and reliably carries out that bolt is installed and fastening to nuclear power generating equipment under water; (2) transmission mechanism that uses of this device is worm-and-wheel gear, compares with gear drive, has auto-lock function, compact conformation, and is laborsaving; (3) because worm gear transmission ratio is big, can realizes small feeding and be easy to manual control, so screw thread is screwed into stable operation, reliable.

Description of drawings

Fig. 1 is a kind of front view of threaded fastening device under water provided by the utility model;

Fig. 2 is the vertical view of Fig. 1.

Among the figure, 1 slide block, 2 bases, 3 long handle tool-joints, 4 guide rails, 5 oil cylinders, 6 piston rods, 7 casings, 8 protective sleeves, 9 long handle tool-joints, 10 long connecting rods, 11 adapter sleeves, 12 connecting pins, 13 worm screws, 14 worm gears.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is described in detail:

General structure of the present utility model is as described below, and the worm and wheel Vertical Meshing connects, and with a box structure it is supported, and an end connector of worm-wheel shaft stretches out outside the casing; The upper end of worm screw is stretched out the top of casing and is connected with the long handle tool-joint, and the long handle tool-joint is connected with long connecting rod again, is connected with two pins by a joint between the long connecting rod, forms a combination long handle instrument; The bottom of casing is connecting on two pairs of slide blocks, and slide block can move as straight line on the pair of guide rails on the pedestal; The right side of casing is connected with the hydraulic jack that is fixed on the pedestal right side by piston rod, when hydraulic jack promotion turbine wheel shaft moves, rotates the long handle instrument, just can make bolt collar produce a thrust and a moment of torsion forward.

As depicted in figs. 1 and 2; it comprises long connecting rod 10 a kind of threaded fastening device under water; connecting pin 12 is inserted on the adapter sleeve 11 two long connecting rods 10 is fixed together; the Worm and worm-wheel gearing that is made of transmission worm screw 13 and worm gear 14 is installed in the casing 7; wherein worm screw 13 and worm gear 14 Vertical Meshing; the end of worm screw 13 protrudes upward outside the casing 7 and is connected with long handle tool-joint 9; the end of worm screw 13 is with the protective sleeve 8 of tubular outward; protective sleeve 8 is fixed on square casing 7 tops; the axle horizontal of worm gear 14 stretches out casing 7 to the right; the right side of casing 7 is connected with the piston rod 6 of hydraulic cylinder 5; the oil cylinder 5 that surges is fixed on base 2 right sides by screw; the bottom of casing 7 is connecting two pairs of slide blocks 1, and slide block 1 can be with casing 7 along guide rail 4 move left and right, and guide rail 4 is screwed on base 2.Two long handle tool-joints 3 are fixed on the both sides of base 2 respectively by being threaded, when being convenient to long connecting rod 11 and putting into water, can steadily place this bolt locking device.

Wherein, long handle tool-joint 9 is that the lower end is connected with an end of long connecting rod 10, and the other end i.e. upper end is connected with the long connecting rod 11 of another root by adapter sleeve 11, connecting pin 12, and the long connecting rod 11 after the combination constitutes combination long handle instrument and stretches out the water surface.

Working method of the present utility model is as follows, when under the effect of hydraulic jack 5, giving forward thrust of one of turbine wheel shaft, rotating emersed long connecting rod 11 simultaneously can make the projecting shaft of worm gear 14 rotate, can make worm gear 14 stretch out bolt collar on the axle head apply one forward thrust and the moment of torsion of a rotation, realize tightening or rotating of screw thread.

Claims

1. threaded fastening device under water, it is characterized in that: it comprises long connecting rod (10), connecting pin (12) is inserted in adapter sleeve (11) and upward two long connecting rods (10) is fixed together, the Worm and worm-wheel gearing that is made of transmission worm screw (13) and worm gear (14) is installed in the casing (7), the end of worm screw (13) protrudes upward outside the casing (7) and is connected with long handle tool-joint (9), the shaft extension of worm gear (14) goes out casing (7) and is connected with the piston rod (6) of oil cylinder (5), oil cylinder (5) is fixed on base (2) right side, the bottom of casing (7) is provided with two pairs of slide blocks (1), slide block (1) can be with casing (7) along guide rail (4) move left and right, guide rail (4) is fixed on the base (2), and the both sides of base (2) are respectively equipped with long handle tool-joint (3).

2. a kind of threaded fastening device under water as claimed in claim 1 is characterized in that: described worm screw (13) and worm gear (14) Vertical Meshing.

3. a kind of threaded fastening device under water as claimed in claim 1 is characterized in that: the end of worm screw (13) is with protective sleeve (8) outward, and protective sleeve (8) is fixed on casing (7) top.