CN202040040U

CN202040040U - Hand-operated hydraulic pump

Info

Publication number: CN202040040U
Application number: CN2011200520385U
Authority: CN
Inventors: 李洪敏
Original assignee: DEZHOU DECHENG DISTRICT LONGKE MACHINERY PLANT
Current assignee: DEZHOU DECHENG DISTRICT LONGKE MACHINERY PLANT
Priority date: 2011-03-02
Filing date: 2011-03-02
Publication date: 2011-11-16
Anticipated expiration: 2021-03-02

Abstract

The utility model relates to a hand-operated hydraulic pump, comprising a pump body, wherein the top and bottom of the pump body are respectively sealed via a top cover and a bottom cover; and the pump body is provided with an oil inlet and an oil outlet. The hand-operated hydraulic pump is characterized in that: two sets of plunger hydraulic cylinders of different sizes are arranged inside the pump body; the input ends of the oil suction non return valves of the two sets of plunger hydraulic cylinders are jointly communicated with the oil inlet of the pump body; high pressure output cavities, communicated via channels, are jointly communicated with the oil outlet of the pump body; non return valves are arranged at the channels between the two high pressure output cavities; meanwhile, the high pressure output cavity inside the big plunger hydraulic cylinder, via the channel, is communicated with the input end of the oil suction non return valve arranged at the lower portion thereof, with a high pressure conduction valve arranged at the channel; the upper portions of the two plungers are hinged to a pressure bar via pegs; a fulcrum bearing, located between the two plungers, is fixedly arranged upon the top cover of the pump body; the top of the fulcrum bearing is hinged to the pressure bar via pegs; and a pressure handle is arranged upon the pressure bar in vertical direction. The hand-operated hydraulic pump can automatically change discharge capacity and output pressure, meet working requirement rapidly and efficiently, improve work efficiency, and prolong service lifetime.

Description

A kind of hydraulic hand-pump

Technical field

The utility model relates to a kind of hydraulic machinery, especially is the hydraulic hand-pump that a kind of discharge capacity is big, efficient is high, pressure is big.

Background technique

Hydraulic hand-pump is easy to carry with it, and the advantage that delivery pressure is big is able to extensive use in big machinery maintenance, engineering construction.The working principle of the hydraulic hand-pump that uses is by the plunger to-and-fro motion in the depression bar drive pump housing at present, and plunger is finished oil suction, oil extraction action respectively in two unidirectional strokes, because plunger base is provided with one-way valve, and can intermittent output high pressure oil.In use there is following technical deficiency in the hand pump of this structure: 1, depression bar makes a round trip and exports a high pressure oil, and efficient is slower, and the high pressure oil of capacity can not be provided fast; 2, its discharge capacity is fixed, the pressure that provides relatively that discharge capacity is bigger is less, the less pressure that provides relatively of discharge capacity is bigger, need a large amount of high pressure oils in the using process often, and be a process that load is changed from small to big, present hand pump can not be regulated voluntarily according to the variation of load; 3, because plunger in the pump housing, as firmly uneven, plunger tends under the influence of side force stuck, and wearing and tearing, leakage of oil easily.

The model utility content

For overcoming the deficiencies in the prior art, the utility model provides that a kind of discharge capacity is big, pressure is high and can adjust the hydraulic hand-pump of discharge capacity according to load variations.

For realizing above-mentioned technical purpose, the utility model is realized by the following technical solutions: a kind of hydraulic hand-pump, comprise a pump housing, sealing by loam cake, bottom respectively up and down of the pump housing, the pump housing is provided with filler opening and oil drain out, it is characterized in that: be provided with size two cover plunger oil hydraulic cylinders in the pump housing, the two oil sucting one-way valve input ends that overlap the plunger oil hydraulic cylinders communicate with the filler opening of the pump housing jointly, and the high pressure output cavity communicates jointly by runner and the oil drain out on the pump housing communicates; Runner between the two high pressure output cavities is provided with one-way valve; High pressure output cavity in the simultaneously big plunger piston fluid pressure cylinder also communicates with the oil sucting one-way valve input end of its lower end by runner, and described runner is provided with the high pressure conducting valve; Two plunger upper part are hinged by pin and depression bar, are fixed with the supporting base between two plungers on the pump body top cover, and the supporting base top is hinged by pin and depression bar, and the depression bar Vertical direction is provided with pressure handle.

Described hydraulic hand-pump is characterized in that: the discharge capacity that bigger plunger makes a round trip is 90ml, and its working stroke is 32mm.

Described hydraulic hand-pump is characterized in that: the discharge capacity that less plunger makes a round trip is 11ml, and its working stroke is 16mm.

Described hydraulic hand-pump is characterized in that: the oil sucting one-way valve in the plunger case adopts cone valve, and fuel-displaced one-way valve adopts ball valve.

Described hydraulic hand-pump, it is characterized in that: described high pressure conducting valve structure is consistent with selector valve, be provided with valve rod in the valve pocket, the valve rod upper end is a hydraulic pressure cavity, hydraulic pressure cavity is communicated with the high pressure output cavity, and the valve rod lower end is provided with Returnning spring, and valve rod is provided with oil groove, after filling with hydraulic oil in the hydraulic pressure cavity, the oil groove in the valve rod is with the input end conducting of the high pressure output cavity and the oil sucting one-way valve of big plunger.

Working mechanism of the present utility model is: pressure handle drives in the depression bar to-and-fro motion process, as load hour, the high pressure conducting valve is in cut-off state under action of reset spring, two plunger piston fluid pressure cylinders replace finishes oil suction, oil extraction action, when huge pillar moves small plunger beyond the Great Wall and moves down, the one-way valve conducting, big plunger moves down when moving on the small plunger, one-way valve ends, and therefore in two strokes high pressure oil output is arranged all; When load is big, high pressure oil in the high pressure output cavity is clamp-oned in the interior hydraulic pressure cavity of high pressure conducting valve, the promotion valve rod moves down, oil groove in the valve rod will be bigger the high pressure output cavity and the conducting of low pressure oil input end of plunger piston fluid pressure cylinder, and since the pressure of pillar plug cylinder high pressure output cavity greater than big plunger case high pressure output cavity, one-way valve between the two is in cut-off state, in the depression bar to-and-fro motion process, bigger plunger piston fluid pressure cylinder is the inner cyclic process of the pump housing, outwards do not export high pressure oil, and less plunger piston fluid pressure cylinder provides pressure bigger high pressure oil with little discharge capacity; Along with the variation of load, big plunger piston fluid pressure cylinder can be changed voluntarily.

The utility model is compared with conventional art, has following beneficial effect: can change size, the delivery pressure size of discharge capacity automatically according to the size of load, rapidly and efficiently satisfy work requirements; Load hour, pressure handle makes a round trip, and exports high pressure oil twice, no-idle running has improved working efficiency; The depression bar two ends all are connected with plunger, have reduced the effect that plunger is subjected to side force, have prolonged the working life of hydraulic hand-pump.

Description of drawings

Accompanying drawing is the inner principle schematic of the utility model.

Among the figure, 1, runner, 2, fuel-displaced one-way valve, 3, high pressure output cavity, 4, hydraulic pressure cavity, 5, one-way valve, 6, loam cake, 7, plunger, 8, pressure handle, 9, guard shield, 10, depression bar, 11, supporting base, 12, guide sleeve, 13, runner, 14, valve rod, 15, runner, 16, oil drain out, 17, the high pressure output cavity, 18, oil groove, 19, oil sucting one-way valve, 20, the low pressure input cavity, 21, filler opening, 22, bottom, 23, oil sucting one-way valve, 24, spring seat, 25, Returnning spring, 26, oil sucting one-way valve, 27, low pressure input cavity, 28, guide sleeve, 29, the pump housing.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described.

Sealing by loam cake 6, bottom 22 respectively up and down of the pump housing 29, the three passes through screw; Be provided with one in the pump housing 29 and annotate the plug chamber, plunger cavity middle and upper part inwall is provided with guide sleeve 28, be provided with the corresponding plunger 7 of model in the guide sleeve 28, plunger 7 lower ends are provided with outside boss, and boss is divided into the high pressure output cavity 3 of top and the low pressure input cavity 27 of below with the plunger cavity of guide sleeve below 28; High pressure output cavity 3 and low pressure input cavity 27 are communicated with by the fuel-displaced one-way valve 2 of plunger 7 lower ends, and fuel-displaced one-way valve 2 can adopt ball valve, and low pressure input cavity 27 lower ends are communicated with 21 by oil sucting one-way valve 26 with filler opening, and oil sucting one-way valve 23 adopts cone valve; Said structure constitutes a big plunger piston fluid pressure cylinder, and the discharge capacity that plunger 7 makes a round trip is 90ml, and its working stroke is 32mm.

Also be provided with simultaneously of constituting by guide sleeve 12, plunger 28, high pressure output cavity 17, low pressure input cavity 20, fuel-displaced one-way valve 19, oil sucting one-way valve 23 and the consistent small plunger oil hydraulic cylinder of above-mentioned big plunger hydraulic cylinder structure in the pump housing 29, the discharge capacity that plunger 28 makes a round trip is 11ml, and its working stroke is 16mm.

Described plunger 7, plunger 28 tops are hinged by pin and depression bar 10, loam cake 6 upper fixed have supporting base 11, supporting base 11 is between plunger 7 and plunger 28, supporting base 11 is hinged by pin and depression bar 10, depression bar 10 is provided with pressure handle 8 connected vertically, and loam cake 6 tops also are fixedly connected with guard shield 9 by screw.

Described high pressure output cavity 3 and high pressure output cavity 17 are communicated with by one-way valve 5 and runner 13; High pressure output cavity 17 communicates with oil drain out 16 on the pump housing 29; High pressure output cavity 3 connects the high pressure conducting valve by runner 1, and the output terminal of high pressure conducting valve communicates with the input end of oil sucting one-way valve 26.

Described high pressure conducting valve and spool-type valves structural similarity, it comprises a valve pocket, be provided with valve rod 14 in the valve pocket, valve rod 14 upper ends are positioned at hydraulic pressure cavity 4, the below is provided with Returnning spring 25 and spring seat 24, and hydraulic pressure cavity 4 communicates by runner 15 with high pressure output cavity 17, is provided with oil groove 18 in the valve rod 14, when filling with hydraulic oil in the hydraulic pressure cavity 4, oil groove 18 can be communicated with the input end of runner 1 with oil sucting one-way valve 26.

Claims

1. hydraulic hand-pump, comprise a pump housing, sealing by loam cake, bottom respectively up and down of the pump housing, the pump housing is provided with filler opening and oil drain out, it is characterized in that: be provided with size two cover plunger oil hydraulic cylinders in the pump housing, the two oil sucting one-way valve input ends that overlap the plunger oil hydraulic cylinders communicate with the filler opening of the pump housing jointly, and the high pressure output cavity communicates jointly by runner and the oil drain out on the pump housing communicates; Runner between the two high pressure output cavities is provided with one-way valve; High pressure output cavity in the simultaneously big plunger piston fluid pressure cylinder also communicates with the oil sucting one-way valve input end of its lower end by runner, and described runner is provided with the high pressure conducting valve; Two plunger upper part are hinged by pin and depression bar, are fixed with the supporting base between two plungers on the pump body top cover, and the supporting base top is hinged by pin and depression bar, and the depression bar Vertical direction is provided with pressure handle.

2. a kind of hydraulic hand-pump according to claim 1 is characterized in that: the discharge capacity that bigger plunger makes a round trip is 90ml, and its working stroke is 32mm.

3. a kind of hydraulic hand-pump according to claim 1 is characterized in that: the discharge capacity that less plunger makes a round trip is 11ml, and its working stroke is 16mm.

4. a kind of hydraulic hand-pump according to claim 1 is characterized in that: the oil sucting one-way valve in the plunger case adopts cone valve, and fuel-displaced one-way valve adopts ball valve.

5. a kind of hydraulic hand-pump according to claim 1, it is characterized in that: be provided with valve rod in the valve pocket of described high pressure conducting valve, the valve rod upper end is a hydraulic pressure cavity, hydraulic pressure cavity is communicated with the high pressure output cavity, the valve rod lower end is provided with Returnning spring, valve rod is provided with oil groove, and after filling with hydraulic oil in the hydraulic pressure cavity, the oil groove in the valve rod is with the input end conducting of the high pressure output cavity and the oil sucting one-way valve of big plunger.