CN2037296U - Screw bolt fastening and dismounting device - Google Patents

Abstract

The utility model belongs to a screw bolt fastening and dismounting device, comprising a hydraulic pump and a tensioner. The device is characterized in that the hydraulic pump is integral forming of manual operation and air-operated. The utility model has the advantages of convenience and flexible use, oil pressure increases fast, high oil pressure, when air-operated maximum oil pressure can reach to 1020 kg/cm+[2] which only need 40 seconds.

Description

Screw bolt fastening and dismounting device

The utility model belongs to a kind of bolted and provision for disengagement, and it comprises hydraulic pump and stretcher.Hydraulic pump produces oil pressure and makes stretcher work---and (in the bolt regime of elastic deformation) bolt stretches, thereby can easily nut be screwed onto fastening or easily detachable position, behind the hydraulic pump draining, bolt retraction restores, so realized bolted or can dismantle easily.

The existing same device such as the Chinese patent CN87202153U(day for announcing 880106) new " a kind of device of hydraulic tensile bolt fastening nut " described.Its hydraulic pump adopts manual or self-propelled, and shortcoming is that operation labour intensity is big, and near maximum pressure the time, pressure rises slower, so the activity duration is longer.On the other hand, existing this maximum pressure manual or that engine-driven hydraulic pump can reach generally all is lower than 70 MPas, common maximum pressure generally all is lower than 70 MPas, 63 MPas commonly, if require higher pressure, charged piston that then must the adapted heaviness, this operation occasion in the open air can't adopt.And in general, the hydraulic pump oil pressure is high more good more, and this can make the further miniaturization of stretcher.Thereby convenient working.

The purpose of this utility model just is to provide a kind of improved bolted and provision for disengagement of being made up of hydraulic pump and stretcher, and its hydraulic pump gas collection is moving, hand is an one, can produce the oil pressure higher than above-mentioned prior art.

The utility model technical essential is to be that hydraulic pump has following special construction:

A, it includes and send oil piston and plunger mantle cavity, the pneumatic and man-operated mechanism of actuation plunger and fuel feeding, accumulation of energy, draining system;

B, said man-operated mechanism are the depression bars that a kind of device has return spring;

C, said pneumatic mechanism comprise the air rammer that back-moving spring is arranged and the plunger shaft of an interlock plunger, also comprise the gas control valve of this air rammer of control to gas, this gas control valve opens and closes the control that is subjected to ram travel, i.e. gas control valve unlatching in limited time on the plunger position, and the position is then closed down in limited time.When connecting compressed air, the gas control valve is opened automatically, and then air rammer is given to depress and moved the linkage plunger, thereby oil is pumped to the stretcher oil cylinder, when reaching under the displacement, plunger prescribes a time limit, the gas control valve is closed, and air rammer is by the back-moving spring linkage plunger that resets, when plunger reaches in the displacement in limited time, the gas control valve is opened again, so said process repeats beginning again so that constantly, make the plunger continuous operation, oil pressure constantly and apace increases.When oil pressure constantly and apace increase so that oil pressure reach the institute take, then cut off source of the gas, stop supercharging.Manual operation only need be pressed manual depression bar and be got final product, so reason and process all are conspicuous no longer narrations.

The utility model has the advantages that: integrate manual, pneumatic, in light weight, volume is little, and is easy to use, flexible; More obviously be: oil pressure increases soon, oil pressure is high.

Example of the present utility model is provided by accompanying drawing 1,2, below in conjunction with the detailed description structure of the present utility model and the course of work.

According to Fig. 1,2, the utility model includes stretcher and hydraulic pump and fuel tank, and stretcher as shown in Figure 2, by moving cylinder 38, quiet cylinder 39, overcoat 41 form (the 44th, bolt, the 40th, nut, 42, the 43rd, coupled), draining road and draining screw 37 are set, oil input channel 45 on the moving cylinder 38.The utility model characteristic is the hydraulic pump (see figure 1).

A, in hydraulic pump body, be provided with plunger mantle cavity 19,36, piston cavity of resorption 16, mantle cavity 36,19, about in the of 16 two ends to be positioned at cavity of resorption, cavity of resorption 16 bottom sides connect muffler 27, there is plunger 17 to pass cavity of resorption 16 and places mantle cavity 19, in 36, mantle cavity 19 bottoms are communicated with fuel tank and connection place is provided with check valve 20, constitute inlet port, mantle cavity 19 side connecting pipelines 21, pipeline 21 other ends are provided with check valve 26, form at check valve 26 other ends and divide pipeline 23,24, pipeline 23 directly is communicated with stretcher oil-in 45 and can installs Pressure gauge 22 with detection oil pressure situation in pipeline 23, pipeline 24 be communicated with fuel tank and pipeline 24 in gate gurgle valve 25 is set;

B, form the man-operated mechanism of actuation plunger 17 by depression bar 2 and return spring 3, an end of depression bar 2 is hinged on the pump housing, and spring 3 is enclosed within on the push rod 4, and push rod 4 tops are pressed on the depression bar 2;

C, the pneumatic mechanism of actuation plunger 17 is as follows: air rammer 14 is set in cavity of resorption 16 and 14 times return spring 18 is set at piston, piston 14 and plunger 17 are fixedly connected with interlock plunger 17, the piston upper chamber 13 of annular is set on the pump housing on piston 14 tops, on the pump housing on epicoele 13 tops plunger shaft 5 is set, 30, plunger shaft 30 ventholes 29 are communicated with epicoele 13, air inlet 33 connecting pipelines 1, plunger shaft 30 the insides are inserted changeover valve 31 movingly, the intermediolateral column of changeover valve 31 and plunger shaft 30 can form intermediate cavity 32, the left side of plunger shaft 30 mouthful connection muffler 27, right mouthful is passed through pipeline 34 and is communicated with plunger shaft 5; Be equipped with manipulation valve 15 and this valve 15 in the plunger shaft 5 and stretch into epicoele 13, the upper end is connected on plunger shaft 5 roofs with stage clip 6, be equipped with cushion rubber 7 between valve 15 steps and plunger shaft 5 steps, valve 15 band hollow pipelines 12 only make plunger shaft 5 be communicated in epicoele 13 by this pipeline 12; Pipeline 34 interludes are that the loop 35(around plunger 17 is that plunger cavity 36 hollow zones and plunger 17 surfaces form), its lengthwise position is determined by following mode: when plunger 17 was positioned at the lower position, end face cushion rubber 9 was in loop 35 positions just on the plunger 17; In pipeline 1 bleed end parts air cutoff valve 10, Pressure gauge 8 can be installed, fixed pressure reducing valve 11 is to control better, to monitor to the gas situation.

The pneumatic working condition of above-mentioned example is: after connecting compressed air, gas enters plunger shaft 5,30(intermediate cavity 32 by pipeline 1), when initial, the gas that enters in the plunger shaft 5 escapes into plunger shaft 5 bottoms by the gap of cushion rubber 7 and valve 15 steps, so that escape into pipeline 34, institute is so that changeover valve 31 right plug right sides produce air pressure, because the right plug of changeover valve 31 right side compression areas are greater than plug right side, a left side and right plug left side compression area, so changeover valve 31 is will be under gas pressure spacing until limited step institute to moving to left.When valve 31 moved to left maximum, gas outlet 29 communicated with intermediate cavity 32 just, so enter being so incensed that with the piston upper chamber 13 of being overflowed by gas outlet 29 in the plunger shaft 30.After epicoele 13 is gone into gas, piston 14 pressurizeds move down linkage plunger 17 and move down, valve 15 moves down under stage clip 6 effects simultaneously, make that valve 15 steps and cushion rubber 7 join fully, the gap disappears, so the gas that enters in the plunger shaft 5 can not enter pipeline 34 again, but the gas in the epicoele 13 can enter plunger shaft 5 bottoms by the hollow pipeline 12 of valve 15 and to escaping into pipeline 34, is in left maximum displacement position and promptly can keeps epicoele 13 and continue ventilation thereby still can keep changeover valve 31.When piston 14 is displaced under the displacement in limited time at the following linkage post plug 17 of removing of gas pressure, end face cushion rubber 9 is just at loop 35 places on the plunger 17, loop 35 no longer seals and communicates with atmosphere, so the gas major part leaks into atmosphere in the pipeline 34, therefore changeover valve 31 will the effect bottom right of gas be moved back into initial position in entering intermediate cavity 32, gas outlet 29 no longer communicates with intermediate cavity 32, the gas of source of the gas can not infeed epicoele 13 again, gas in the epicoele 13 then returns into plunger shaft 30 through air inlet 29, enter atmosphere until entering muffler 27 by pipeline 28, so piston 17 interlock plunger 17 under spring 18 effects together returns initial position, handle valve 15 and also return initial position, said process repeats again thus.As seen, after source of the gas was connected, plunger 17 can constantly and promptly move up and down work done, makes oil constantly be pumped to the stretcher oil cylinder, and oil pressure increases rapidly.When observing oil pressure by Pressure gauge 22 when reaching desirable value, can cut off source of the gas.

Above-mentioned example once carried out on-the-spot test, obtained following data:

Bleed pressure kg/cm ²Operating oil pressure kg/cm ²Reach working oil pressure time S

(static setting/dynamic value) (single stretcher)

1／0.8 60

3／2.8 400

4／3.7 580

5／4.6 740 25

6／5.7 940 30

7.2／7.2 1020 40

In addition supplementary notes a bit, the stretcher in the above-mentioned example is not limited only to structure shown in Figure 2, adopts the stretcher of other structure, also is fine such as the stretcher described in the Chinese patent CN87202153U.

Claims (3)

1, bolted and provision for disengagement include stretcher and hydraulic pump and fuel tank, and its feature is as follows:

Be provided with plunger mantle cavity 19,36 in a, the hydraulic pump body, piston cavity of resorption 16, mantle cavity 36,19 are positioned at cavity of resorption, and about in the of 16 two ends, cavity of resorption 16 bottom sides connect muffler 27, there is plunger 17 to pass cavity of resorption 16 and places mantle cavity 19,36, mantle cavity 19 bottoms are communicated with fuel tank and connection place is provided with check valve 20, mantle cavity 19 side connecting pipelines 21, pipeline 21 other ends are provided with check valve 26, form pipeline 23,24 at check valve 26 other ends, pipeline 23 directly is communicated with the stretcher oil cylinder, pipeline 24 be communicated with fuel tank and pipeline 24 in gate gurgle valve 25 is set.

B, form the man-operated mechanism of actuation plunger 17 by depression bar 2 and return spring 3.

C, the pneumatic mechanism of actuation plunger 17 is as follows: air rammer 14 is set in cavity of resorption 16 and 14 times return spring 18 is set at piston, piston 14 and plunger 17 are fixedly connected with interlock plunger 17, the piston upper chamber 13 of annular is set on the pump housing on piston 14 tops, the pump housing on epicoele 13 tops is provided with plunger shaft 5,30, plunger shaft 30 ventholes 29 are communicated with epicoele 13, air inlet 33 connecting pipelines 1, plunger shaft 30 the insides are inserted changeover valve 31 movingly, the intermediolateral column of changeover valve 31 and plunger shaft 30 can form center lumen 32, the left side of plunger shaft 30 mouthful connection muffler 27, right mouthful by pipeline 34 connection plunger shaft 5; Be equipped with manipulation valve 15 and this valve 15 in the plunger shaft 5 and stretch into epicoele 13, the upper end is connected on plunger shaft 5 roofs with stage clip 6, be equipped with cushion rubber 7 between valve 15 steps and plunger shaft 5 steps, valve 15 band hollow pipelines 12 only make plunger shaft 5 be communicated in epicoele 13 by this pipeline 12; Pipeline 34 interludes are the loops 34 around plunger 17, and its lengthwise position is determined by following mode; When plunger 17 was positioned at the lower position, end face cushion rubber 9 was in loop 35 positions just on the plunger 17.

2, by described bolted of claim 1 and provision for disengagement, it is characterized in that: air cutoff valve 10, Pressure gauge 8, fixed pressure reducing valve 11 are installed in pipeline 1 bleed end parts.

3, by claim 1,2 described bolted and provisions for disengagement, it is characterized in that: be equiped with Pressure gauge 22 in the pipeline 23.

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