CN2532268Y - Diameter-changeable double-displacement hand driven plunger pump - Google Patents
Diameter-changeable double-displacement hand driven plunger pump Download PDFInfo
- Publication number
- CN2532268Y CN2532268Y CN 02218691 CN02218691U CN2532268Y CN 2532268 Y CN2532268 Y CN 2532268Y CN 02218691 CN02218691 CN 02218691 CN 02218691 U CN02218691 U CN 02218691U CN 2532268 Y CN2532268 Y CN 2532268Y
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- China
- Prior art keywords
- plunger rod
- diameter
- spring
- displacement
- utility
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- Expired - Fee Related
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Abstract
The utility model relates to a variable-diameter double-displacement manual piston pump used for oil pump for micro-electromagnetic water pumps such as hydraulic hauling equipments and hoisting apparatus. The utility model is mainly structured as that steel balls and a spring is arranged in a plunger rod; a valve seat is screwed into the lower part of the plunger rod; a limit spring is arranged on the plunger rod; a push rod is installed in a plug screw to form a plunger rod component which is installed in a pump cylinder, then a guide sleeve is arranged outside the push rod and in an oil passage underplate and finally an offsetting spring is arranged on the plug screw. The utility model which has a simple, compact and reasonable structure can realize two-directional displacement work in the same pump cylinder, has the automatic switch function between the bigger diameter displacement and the smaller diameter displacement and has adjustable bigger and smaller diameters load preset value.
Description
Technical field:
The utility model relates to a kind of diameter-changeable double-displacement hand piston pump, is used for the fuel feeding of pumps such as hydraulic pressure haulage equipment and crane gear.
Technical background:
Before the utility model was made, in prior art, its plunger pump mainly was made up of plunger rod, push rod, spring, pumping cylinder, valve seat etc.This kind structure plunger pump only has a kind of discharge capacity, and the clutch release slave cylinder lifting velocity is slow when hanging down load, and inefficiency can't realize limiting the adjustment of load and the large and small footpath discharge capacity automatic switching function of pump.
Technology contents:
The purpose of this utility model is to overcome above-mentioned deficiency, thereby provides a kind of simple in structure, compact, reasonable; In same pumping cylinder, can realize the two-way discharge capacity work of plunger pump reducing, and can reach large and small footpath discharge capacity automatic switching function and the adjustable diameter-changeable double-displacement hand piston pump of large and small footpath discharge capacity load limit value.
Main solution of the present utility model is achieved in that
It mainly adopts steel ball 8, spring 9 and steel ball 12 to be installed in the plunger rod 2, valve seat 11 is screwed into plunger rod 2 bottoms, spring 6 is housed on plunger rod 2, push rod 4 is installed in the plug screw 1, above-mentioned parts are formed plunger rod component, plunger rod component is installed in the pumping cylinder 10, is installed in the oil circuit base plate after loading onto guide sleeve 7, refills spring 5.
Description of drawings:
Fig. 1 is the utility model structure erection drawing:
Fig. 2 is the utility model oil suction duty construction figure:
Fig. 3 presses oily duty construction figure for the utility model:
Embodiment:
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:
The utility model at first is installed in steel ball 8, spring 9, seal ring 13, steel ball 12 in the plunger rod 2, and above-mentioned parts are packed into from plunger rod 2 bottoms, valve seat 11 is screwed into plunger rod 2 bottoms again.Plunger rod 2 cylindricals adopt two diameters of size to form, and major diameter is Φ 30～Φ 35mm, and minor diameter is Φ 16～Φ 22mm.Be shaped on oil-sucking hole on the plunger rod 2.Limit spring 6 is installed on plunger rod 2 tops, and push rod 4, pressure regulating screw 3 (and regulating the load limit value) are packed into and are sealed plug screw 1.Above-mentioned plunger rod component assembling finishes.After being installed in plunger rod component in the pumping cylinder 10, guide sleeve 7 being installed again having been formed assembly of the plunger pump.Again assembly of the plunger pump is screwed in the oil circuit base plate, and Returnning spring 5 and spring seat are installed.As long as piston rod 2 moves up and down and can realize oil suction, oil extraction process.Fluid can enter integrated form control valve piece by oil circuit base plate oil duct, enters operating cylinder again.
Working principle of the present utility model and working procedure:
1, when plunger rod 2 is up, under 6 effects of pressure limiting spring, Φ 6 steel balls 12 combine with pump seat 11 sealing surfaces, and 2 Φ 3 steel balls 8 are in the state of shutting, plunger rod 2 real work diameters are the big footpath work of plunger rod 2 places, guarantee that pump oil suction from oil storage cylinder is full of pumping cylinder 10 cavity of resorptions.
Press oily operating mode when 2, being lower than the qualification load:
When external loading is lower than limit value, when plunger rod 2 is descending, system pressure is not enough to overcome the resistance of pressure limiting spring 6, can not push the sealing surface of Φ 6 steel balls 12 and valve seat open, when pressing oil, plunger rod 2 still is in the work of big footpath, promptly big discharge capacity work, fluid is pressed into operating cylinder, realizes the work that hoists fast of operating cylinder.
Press oily operating mode when 3, being higher than the qualification load:
When external loading is higher than limit value, plunger rod 2 is descending, because external loading is higher than limit value, system pressure is big, is enough to overcome the resistance of pressure limiting spring 6, push steel ball 6 and sealing surface of seat open, part fluid is by Φ 6 steel ball place passages, the epicoele of the pumping cylinder that overflows back again, and plunger rod 2 real work diameters are in path work when pressing oil, have only the fluid in the minor diameter to be pressed into operating cylinder, i.e. float amount work.When realizing high capacity, hand piston pump is laborsaving.Except that from the oil storage cylinder oil suction, the fluid that is stored in the pumping cylinder epicoele backed down the cavity of resorption that Φ 3 steel balls 8 return pumping cylinder when plunger rod 2 rose when second time oil suction.
4, limit the adjustment of load value:
Can limit load value by the pretightening force adjustment of adjusting pressure limiting spring 6 according to need of work.Its method is as follows: pull down sealing plug screw 1 usefulness inner hexagon spanner turn pressure regulating screw 3, promote push rod 4, compress (or loosening) pressure limiting spring 6 and adjust the pressure limiting initial tension of spring, realize limiting the adjustment of load value.
Compared with the prior art the utility model has the following advantages:
1, simple in structure, compact, reasonable; Can in same pumping cylinder, realize the two-way discharge capacity of plunger displacement pump reducing Work; 2, the large and small footpath discharge capacity of pump has automatic switching function; 3, the large and small footpath discharge capacity load of pump Limit value is adjustable.
Claims (3)
1, a kind of diameter-changeable double-displacement hand piston pump, comprise plunger rod (2), push rod (4), pumping cylinder (10), valve seat (11), it is characterized in that adopting steel ball (8), (12), spring (9) to be installed in the plunger rod (2), valve seat (11) is screwed into plunger rod (2) bottom, spring (6) is housed on plunger rod (2), push rod (4) is installed in the interior plunger rod component of forming of plug screw (1) and is installed in the pumping cylinder (10), loads onto guide sleeve (7) and is installed in the oil circuit base plate, refills upper spring (5).
2, diameter-changeable double-displacement hand piston pump according to claim 1 is characterized in that described plunger rod (2) is made up of two diameters, and major diameter is Φ 30～Φ 35mm, and minor diameter is Φ 16～Φ 22mm.
3, diameter-changeable double-displacement hand piston pump according to claim 1 is characterized in that being shaped on the hole on the described plunger rod (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02218691 CN2532268Y (en) | 2002-01-30 | 2002-01-30 | Diameter-changeable double-displacement hand driven plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02218691 CN2532268Y (en) | 2002-01-30 | 2002-01-30 | Diameter-changeable double-displacement hand driven plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2532268Y true CN2532268Y (en) | 2003-01-22 |
Family
ID=33697296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02218691 Expired - Fee Related CN2532268Y (en) | 2002-01-30 | 2002-01-30 | Diameter-changeable double-displacement hand driven plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2532268Y (en) |
-
2002
- 2002-01-30 CN CN 02218691 patent/CN2532268Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |