CN109630372A - A kind of novel ultrahigh pressure type pilot hydraulic hand pump - Google Patents
A kind of novel ultrahigh pressure type pilot hydraulic hand pump Download PDFInfo
- Publication number
- CN109630372A CN109630372A CN201910100457.2A CN201910100457A CN109630372A CN 109630372 A CN109630372 A CN 109630372A CN 201910100457 A CN201910100457 A CN 201910100457A CN 109630372 A CN109630372 A CN 109630372A
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- pilot
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- 239000002828 fuel tank Substances 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005086 pumping Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 178
- 239000007788 liquid Substances 0.000 description 36
- 239000010727 cylinder oil Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000000605 extraction Methods 0.000 description 5
- 238000005457 optimization Methods 0.000 description 4
- 206010020852 Hypertonia Diseases 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 206010016256 fatigue Diseases 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/14—Pumps characterised by muscle-power operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a kind of novel ultrahigh pressure type pilot hydraulic hand pumps, are related to the technical field of manual pumping unit, especially a kind of technical field of novel ultrahigh pressure type pilot hydraulic hand pump.Present invention employs pilot-type relief valves, when piston reciprocating is suppressed, high pressure small pump core overcomes the resistance of overflow valve, the spool of overflow valve is opened all the way up, low pressure oil is directly communicated to fuel tank, the resistance ability oil return box of overflow valve will be overcome by avoiding low pressure oil always, so as to avoid staff to the active force of overflow valve, alleviate the burden of staff, realize labour-saving effect, so as to realize manual pump highest 400MPa operating pressure, this Ultra-high Pressure Hand Pump can be made to meet in the applying working condition requirement for needing operating pressure 350MPa or more.
Description
Technical field
The present invention relates to the technical field of manual pumping unit, especially a kind of novel ultrahigh pressure type pilot hydraulic hand pump
Technical field.
Background technique
Armstrong's patent can be converted to a kind of small-scale liquid press pump of hydraulic energy by hydraulic hand pump.Using mating oil cylinder
And in the case where specific purpose tool, various operations can be carried out, such as lifting, bending, alignment, shearing, riveted, assembly, disassembly and some
Construction, military construction etc. have high pressure, manual, microminiature, easy to carry, easy to operate, the characteristics of having a wide range of application.
With reference to (the application publication number: CN105986983A, a kind of patent name: novel ultrahigh pressure hydraulic manual of documents 1
Pump) documented by device, be technically characterized in that by by the pump housing 1, seal assembly 2, retaining ring 3, guide rod guide sleeve 4, the first O
Type circle 5, pump core 6, interior hexagon concave-end locking screw 12, oil suction fabrication hole 9, the second O-ring 10, front stall 11, interior hexagonal female end are tight
Determine screw 12, hexagon socket cap head screw 13, high pressure pressure regulating screw 14, piston body 17, pump core guide sleeve 15 and guide rod 16 to apply
In hydraulic hand-pump, by the way of grooved seal, it can be realized the above operating pressure of manual pump highest 350MPa, can make
This Ultra-high Pressure Hand Pump meets in the applying working condition requirement for needing operating pressure 150MPa or more, while device structure is opposite
Traditional manual hydraulic pump is not very complicated, better tightness, wherein the structure of high pressure pressure regulating screw 14 such as this specification attached drawing 5
It is shown, including screw, pressure spring and spool composition, there are following technical problems for this structure；
When piston reciprocating is suppressed, and low pressure oil needs are opened overflow valve by suppressing the process of piston, to make low
Pressure oil is opened overflow valve and is returned in fuel tank；During piston reciprocating is suppressed, overflow valve can repeat switching motion, so as to cause this
The overflow valve of structure can not be always on, when in-oil cylinder oil pressure is gradually increasing, since overflow valve repeats switching motion, from
And to the process (hydraulic oil opens overflow valve when suppressing, the movement that overflow valve is closed when oil suction) for suppressing piston, form one
Stock resistance, to make to suppress process time-consuming and laborious；Therefore in practice, which, which still needs, consumes a large amount of strength,
It is suppressed for a long time so as to cause staff and is easy to feel laborious and tired out.
Two, due to hypertonia, it will cause in-oil cylinder piston rod and rise less than highest point；This technical problem is caused to be deposited
The reason of, mainly have following items: physical demands is excessive in 1. staff's operating process, does not use caused by strength finally；
2. due to hypertonia, caused by safety valve automatically opens；3, it due to suppressing hypertonia, and cannot release stress, lead in time
Fine and close sealing assembly damage, oil pressure reduces after seal assembly damage, and piston rod is caused to fall automatically.
Three, during piston reciprocating is suppressed, overflow valve repeats switching motion, is easy to repeat especially under high-pressure situations
Switching motion will cause overflow valve damage, influence the service life of device.
Summary of the invention
The object of the invention is that providing a kind of novel ultrahigh pressure type pilot hydraulic manual to solve the above-mentioned problems
Pump.
The present invention is achieved through the following technical solutions above-mentioned purpose, a kind of novel ultrahigh pressure type pilot hydraulic hand pump,
Including hydraulic hand pump main body, pilot-type relief valve, the hydraulic hand pump main body includes oil pipe port, low pressure pipe, height
It is pressed into oil pipe, piston, the side of the hydraulic hand pump main body is equipped with front stall, hydraulic hand pump main body and front stall by bolt
Oil pipe port is set, and one end of the oil pipe port connects fuel tank, and the other end of oil pipe port passes through check valve A connection low pressure oil
Pipe, the low pressure pipe include the first low pressure pipe, the second low pressure pipe, third low pressure pipe, the 4th low pressure pipe, oil pipe end
For mouth by check valve B connection high pressure oil inlet pipe, high pressure oil inlet pipe includes the first high pressure oil inlet pipe, the second high pressure oil inlet pipe, hydraulic
Manual pump main body is provided with low pressure oil pocket, the intracavitary setting piston of low pressure oil, is fixedly connected with the big pump of low pressure immediately below the piston
Core, the low pressure large pump core and low pressure oil pocket are sealed and are slidably connected, and low pressure oil pocket is low by the connection first of the second low pressure pipe
Pressuring oil pipe, high pressure small pump core is fixedly connected with below the low pressure large pump core, and high-voltage oil cavity, institute is arranged in the lower section of high pressure small pump core
State high pressure small pump core and high-voltage oil cavity sealing and be slidably connected, the low pressure oil pocket and high-voltage oil cavity by third low pressure pipe,
Check valve C, the connection of the first high pressure oil inlet pipe, the high-voltage oil cavity pass through the second high pressure oil inlet pipe, check valve D connection flowline,
The flowline connects oil cylinder, and flowline is additionally provided with high-pressure oil pipe, and the hydraulic hand pump main body is provided with pilot-type relief valve
Slot, pilot-type relief valve slot are internally provided with pilot-type relief valve, and the 4th low pressure pipe is connected with the other end of high-pressure oil pipe
The other end of pilot-type relief valve, the 4th low pressure pipe connects the first low pressure pipe and the second low pressure pipe, pilot-type relief valve
Comprising screw, pressure spring, spool, the spool stated is made of upper valve core and bottom spool, and upper valve core and bottom spool are integral type institute
It states screw to connect by the first O-ring with hydraulic hand pump body seal, spool, the spool and institute is arranged in the underface of screw
Screw is stated to connect by pressure spring, and spool and pilot-type relief valve slot slidingly and sealingly connect, the pilot-type relief valve and
Front stall is provided with tank tube, and tank tube connects fuel tank.
Preferably, the spool is disposed with retaining ring, the second O-ring.
Preferably, the 4th low pressure pipe connects pilot-type relief valve, and high-pressure oil pipe also connects pilot-type relief valve.
Preferably, safety valve is arranged in the high pressure oil inlet pipe, and relief valve is arranged in the flowline.
The positive effect of the present invention is as follows:
Present invention employs pilot-type relief valves, and when piston reciprocating is suppressed, high pressure small pump core overcomes the resistance of overflow valve, overflow
The spool of stream valve is opened all the way up, and low pressure oil is directly communicated to fuel tank, and the resistance of overflow valve will be overcome by avoiding low pressure oil always
Power ability oil return box alleviates the burden of staff so as to avoid staff to the active force of overflow valve, realizes laborsaving
Effect, so as to realize manual pump highest 400MPa operating pressure, can make this Ultra-high Pressure Hand Pump meet in need
Want the applying working condition requirement of operating pressure 350MPa or more.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is main view of the invention.
Fig. 3 is top view of the invention.
Fig. 4 is the structural schematic diagram of pilot-type relief valve.
Fig. 5 is the structural schematic diagram of the prior art.
In figure: 1, hydraulic hand pump main body, 2, pilot-type relief valve, 3, oil pipe port, 4, low pressure pipe, 401, first is low
Pressuring oil pipe, the 402, second low pressure pipe, 403, third low pressure pipe, the 404, the 4th low pressure pipe, 5, high pressure oil inlet pipe, 501,
One high pressure oil inlet pipe, the 502, second high pressure oil inlet pipe, 6, piston, 7, low pressure large pump core, 8, high pressure small pump core, 9, type pilot overflow
Valve pool, the 10, first O-ring, 11, screw, 12, pressure spring, 13, spool, 1301, upper valve core, 1302, bottom spool, 14, retaining ring, 15,
Second O-ring, 16, front stall, 17, tank tube, 18, safety valve, 19, low pressure chamber, 20, check valve A, 21, check valve B, 22, high pressure
Chamber, 23, check valve C, 24, check valve D, 25, flowline, 26, high-pressure oil pipe, 27, relief valve.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It please refers to shown in Fig. 1-4, a kind of novel ultrahigh pressure type pilot hydraulic hand pump, including hydraulic hand pump main body 1, elder generation
Conductivity type overflow valve 2, the hydraulic hand pump main body 1 include oil pipe port 3, low pressure pipe 4, high pressure oil inlet pipe 5, piston 6, institute
The side for stating hydraulic hand pump main body 1 is equipped with front stall 16 by bolt, and oil pipe end is arranged in hydraulic hand pump main body 1 and front stall 16
Mouth 3, one end of the oil pipe port 3 connect fuel tank, and the other end of oil pipe port 3 passes through check valve A20 connection low pressure pipe 4,
The low pressure pipe 4 includes the first low pressure pipe 401, the second low pressure pipe 402, third low pressure pipe 403, the 4th low pressure pipe
404, by check valve B21 connection high pressure oil inlet pipe 5, high pressure oil inlet pipe 5 includes the first high pressure oil inlet pipe 501, for oil pipe port 3
Two high pressure oil inlet pipes 502, hydraulic hand pump main body 1 are provided with low pressure oil pocket 19, piston 6, the work are arranged in low pressure oil pocket 19
The underface of plug 6 is fixedly connected with low pressure large pump core 7, the low pressure large pump core 7 and the sealing of low pressure oil pocket 19 and is slidably connected, low pressure
Oil pocket 19 connects the first low pressure pipe 401 by the second low pressure pipe 402, and the lower section of the low pressure large pump core 7 is fixedly connected with height
Small pump core 8 is pressed, the lower section of high pressure small pump core 8 is arranged high-voltage oil cavity 22, the high pressure small pump core 8 and the sealing of high-voltage oil cavity 22 and slides
Dynamic connection, the low pressure oil pocket 19 and high-voltage oil cavity 22 pass through third low pressure pipe 403, check valve C23, the first high pressure oil inlet pipe
501 connections, the high-voltage oil cavity 22 pass through the second high pressure oil inlet pipe 502, check valve D24 connection flowline 25, the flowline
25 connection oil cylinders, flowline 25 are additionally provided with high-pressure oil pipe 26, and the hydraulic hand pump main body 1 is provided with pilot-type relief valve slot 9,
Pilot-type relief valve slot 9 is internally provided with pilot-type relief valve 2, the other end of the 4th low pressure pipe 404 and high-pressure oil pipe 26
Pilot-type relief valve 2 is connected, the other end of the 4th low pressure pipe 404 connects the first low pressure pipe 401 and the second low pressure pipe
402, pilot-type relief valve 2 includes screw 11, pressure spring 12, spool 13, and the screw 11 passes through the first O-ring 10 and hydraulic manual
It pumps main body 1 to be tightly connected, spool 13 is arranged in the underface of screw 11, and the spool is by upper valve core 1301 and 1302 groups of bottom spool
At, and upper valve core 1301 and bottom spool 1302 are integral type, the spool 13 and the screw 11 pass through pressure spring 12 and connect, and
And spool 13 and pilot-type relief valve slot 9 slidingly and sealingly connect, the pilot-type relief valve 2 and front stall 16 are provided with tank tube
17, tank tube 17 connects fuel tank.
As a kind of technical optimization scheme of the invention, the check valve A20 and check valve B21, which can be played, prevents oil
Liquid is back to the effect in fuel tank, in the present apparatus in filling liquid, oil liquid inside low pressure pipe 4 can by check valve C23 into
Enter high pressure oil inlet pipe 5, prevent 4 internal pressure of low pressure pipe excessively high, protects the present apparatus, when high pressure small pump core 7 back and forth pressurizes, unidirectionally
Valve D24 can prevent oil liquid to be back to high-voltage oil cavity 22.
As a kind of technical optimization scheme of the invention, the spool 13 is disposed with retaining ring 14, the second O-ring
15, second O-ring 15 improves the leakproofness of spool 13 and hydraulic hand pump main body 1, prevents the oil liquid stream of 13 bottom of spool
To 13 top of spool, the retaining ring 14 plays guiding role, and when spool 13 moves up and down, retaining ring 14 protects spool 13, improves this
The service life of device.
As a kind of technical optimization scheme of the invention, the 4th low pressure pipe 404 connects pilot-type relief valve 2,
High-pressure oil pipe 26 also connects pilot-type relief valve 2, and the oil liquid in low pressure pipe 4 is able to enter at the upper valve core 1301 of spool 13,
The oil liquid of high-pressure oil pipe 26 can only enter the lower section of the bottom spool 1302 of spool 13.
As a kind of technical optimization scheme of the invention, safety valve 18, the safety valve is arranged in the high pressure oil inlet pipe 5
18 between check valve D24 and high-voltage oil cavity 22, when high pressure oil inlet pipe 5 inside blocking the problems such as failure when, high pressure oil inlet
When the pressure of pipe 5 reaches 18 value of safety valve setting, the safety valve 18 is opened, draining, reduces the pressure in high pressure oil inlet pipe 5,
Protective device, relief valve 27 is arranged in the flowline 25, after device use, relief valve 27 is opened, so that oil liquid flows back to
Fuel tank.
Embodiment
Please refer to shown in Fig. 1-4, the present apparatus when in use,
Staff suppresses piston 6 by handle, and check valve A, check valve B, check valve C, check valve D are opened, by past
Strike-on presses piston 6, and piston 6 drives low pressure large pump core 7 and high pressure small pump core 8 to move up and down, and realizes low pressure oil pocket 19 and high pressure oil
Chamber 22 carry out oil suction and oil extraction movement, oil liquid from oil pipe port 3 enter the present apparatus, 5 oil inlet of low pressure pipe 4 and high pressure oil inlet pipe,
So that being full of oil liquid inside the present apparatus, and oil liquid enters oil cylinder by flowline 25；
Staff continues handle and suppresses piston 6, and piston 6 drives low pressure large pump core 7 and high pressure small pump core 8 to move up and down,
Realize that low pressure oil pocket 19 and high-voltage oil cavity 22 carry out oil suction and oil extraction movement, so that the oil liquid inside oil cylinder continues growing, pressure
It gradually rises, the oil liquid in oil cylinder enters the lower section of the bottom spool 1302 of spool 13 by high-pressure oil pipe 26, and piston 6 is toward strike-on
Pressure, in-oil cylinder oil liquid continue to increase, when in-oil cylinder oil pressure is greater than the resistance of guiding overflow valve 2, bottom spool 1302
The oil liquid of lower section jacks up bottom spool 1302, since upper valve core 1301 and bottom spool 1302 are integral type, upper valve core 1301
Upward jack-up is synchronized, further, spool 13 is opened all the way up, so that guiding overflow valve 2 is opened；Staff
Continue swinging handle and suppress piston 6, when piston 6 pulls up, low pressure oil pocket 19 and high-voltage oil cavity 22 carry out oil suction movement, and oil liquid passes through
Oil pipe port 3 enters oil inlet pipe 401, enters low pressure oil pocket 19 by the second low pressure pipe 402；Oil liquid passes through 3 He of oil pipe port
Check valve B21 is passed through the first high pressure oil inlet pipe 501, then is passed through high-voltage oil cavity 22；When piston 6 pushes, check valve C23 and check valve
D24 is opened, and the part oil liquid in low pressure oil pocket 19 is passed through the second low pressure pipe 402 and the 4th low pressure pipe 404, then passes through elder generation
Conductivity type overflow valve 2 and tank tube 17 enter fuel tank, remaining oil liquid enters high pressure by third low pressure pipe 403 and check valve D24
Oil inlet pipe 5；Oil liquid inside high pressure oil inlet pipe 5 continues through check valve D24 and flowline 25 enters oil cylinder；
Present apparatus work finishes, and needs for pressure to be reduced as zero, opens relief valve 27, the pressure decline in device, oil liquid
Fuel tank is flowed back to by relief valve 27；
When the dangerous situations such as blocking occur for high pressure oil inlet pipe 5, the pressure of high pressure oil inlet pipe 5 reaches 18 setting value of safety valve
When, safety valve 18 is opened, draining, the pressure in high pressure oil inlet pipe 5 is reduced, to protect the present apparatus.
Wherein, piston 6 is back and forth suppressed, and in-oil cylinder oil liquid continues to increase, when in-oil cylinder oil pressure is greater than guiding overflow
When the resistance of valve 2, the oil liquid of the lower section of bottom spool 1302 jacks up bottom spool 1302, due to upper valve core 1301 and bottom spool 1302
For integral type, therefore, upper valve core 1301 synchronizes upward jack-up, and further, spool 13 is opened all the way up, so that first
The property led overflow valve 2 is opened, and low pressure oil is directly communicated to fuel tank, and the resistance of guiding overflow valve will be overcome just by avoiding low pressure oil always
Energy oil return box alleviates the burden of staff so as to avoid staff to the active force of guiding overflow valve, realizes and saves
The effect of power.
Wherein, the flow direction of low pressure oil: when piston 6 pulls up, check valve A20 is opened, and low pressure oil pocket 19 carries out oil suction movement,
Oil liquid enters oil pipe port 3, and oil liquid is passed through check valve A20, into oil inlet pipe 401, enters low pressure by the second low pressure pipe 402
Oil pocket 19；When piston 6 is pressed downward, low pressure oil pocket 19 carries out oil extraction movement, and check valve C23 is opened, and oil liquid passes through third low pressure oil
Pipe 403 and check valve C23, into the first high pressure oil inlet pipe 501.
Wherein, the flow direction of high pressure oil: when piston 6 pulls up, check valve B21 is opened, and high-voltage oil cavity 22 carries out oil suction movement,
Oil liquid is by check valve B21, into the first high pressure oil inlet pipe 501, subsequently into high-voltage oil cavity 22；When plug 6 is pressed downward, check valve
D is opened, and high-voltage oil cavity 22 carries out oil extraction movement, and the oil liquid inside high-voltage oil cavity 22 enters the second high pressure oil inlet pipe 502, and second is high
It is pressed into the oil liquid inside oil pipe 502 and flowline 25 is passed through by check valve D24, part oil liquid flows into high-pressure oil pipe 26, then flows
Enter the lower section of the bottom spool 1302 of guiding overflow valve 2, another part oil liquid enters oil cylinder, so that full of oil inside the present apparatus
Liquid continues to suppress piston 6, so that the oil liquid inside oil cylinder increases.
Citing:
Using pilot-type relief valve 2 (400MPa), when the resistance of guiding overflow valve 2 is 2MPa power, in-oil cylinder oil pressure
When greater than 2MPa power, the upper valve core 1301 of the spool 13 of guiding overflow valve 2 can be opened, the oil liquid energy in low pressure pipe 4
It is enough directly communicated to fuel tank, in-oil cylinder oil pressure drives high pressure small pump core 8 to move down, realizes by pushing pressure piston 6, piston 6
High-voltage oil cavity 22 carries out oil extraction movement, the oil liquid in high pressure oil inlet pipe 5 is pressed into fuel tank, to realize raised.Therefore work
The handle operating force for making personnel is equal to the power for suppressing high pressure small pump core 8 equal to 510.5N equal to the power for suppressing piston 6.
And the device of guiding overflow valve is not used, staff needs to suppress piston reciprocating, and low pressure oil needs to lead to
It crosses and suppresses the process of piston and open overflow valve, returned in fuel tank so that low pressure oil be made to open overflow valve, therefore staff
Handle operating force, which is equal to, to be suppressed the power of piston 6 and is equal to and suppresses the power of the power of high pressure small pump core 8+suppress low pressure large pump core 7 and be equal to
625.5N。
Therefore, the present apparatus can reduce the burden of staff in actual operation, realize labour-saving effect, so as to
It realizes manual pump highest 400MPa operating pressure, this Ultra-high Pressure Hand Pump satisfaction can be made to need operating pressure 350MPa
Above applying working condition requirement.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (4)
1. a kind of novel ultrahigh pressure type pilot hydraulic hand pump, including hydraulic hand pump main body, pilot-type relief valve, feature exist
In the hydraulic hand pump main body includes oil pipe port, low pressure pipe, high pressure oil inlet pipe, piston, the hydraulic hand pump master
The side of body is equipped with front stall by bolt, and hydraulic hand pump main body and front stall are arranged oil pipe port, and the one of the oil pipe port
End connection fuel tank, for the other end of oil pipe port by check valve A connection low pressure pipe, the low pressure pipe includes the first low pressure oil
Pipe, the second low pressure pipe, third low pressure pipe, the 4th low pressure pipe, oil pipe port pass through check valve B connection high pressure oil inlet pipe,
High pressure oil inlet pipe includes the first high pressure oil inlet pipe, the second high pressure oil inlet pipe, and hydraulic hand pump main body is provided with low pressure oil pocket, low pressure
Piston is set in oil pocket, is fixedly connected with low pressure large pump core immediately below the piston, the low pressure large pump core and low pressure oil pocket are close
It seals and is slidably connected, low pressure oil pocket connects the first low pressure pipe by the second low pressure pipe, and the lower section of the low pressure large pump core is solid
Surely connect high pressure small pump core, the lower section of high pressure small pump core be arranged high-voltage oil cavity, the high pressure small pump core and high-voltage oil cavity sealing and
It is slidably connected, the low pressure oil pocket is connected with high-voltage oil cavity by third low pressure pipe, check valve C, the first high pressure oil inlet pipe, institute
High-voltage oil cavity is stated by the second high pressure oil inlet pipe, check valve D connection flowline, the flowline connects oil cylinder, and flowline is also set
It is equipped with high-pressure oil pipe, the hydraulic hand pump main body is provided with pilot-type relief valve slot, and pilot-type relief valve slot is internally provided with
Pilot-type relief valve, the 4th low pressure pipe connect pilot-type relief valve with the other end of high-pressure oil pipe, the 4th low pressure pipe it is another
One end connects the first low pressure pipe and the second low pressure pipe, and pilot-type relief valve includes screw, pressure spring, spool, and the screw is logical
The first O-ring is crossed to connect with hydraulic hand pump body seal, the underface of screw is arranged spool, the spool by upper valve core and
Bottom spool composition, and upper valve core and bottom spool are integral type, and the spool is connected with the screw by pressure spring, and spool
It is slidingly and sealingly connected with pilot-type relief valve slot, the pilot-type relief valve and front stall are provided with tank tube, tank tube connection oil
Case.
2. a kind of novel ultrahigh pressure type pilot hydraulic hand pump according to claim 1, it is characterised in that: the spool
It is disposed with retaining ring, the second O-ring.
3. a kind of novel ultrahigh pressure type pilot hydraulic hand pump according to claim 1, it is characterised in that: described the 4th
Low pressure pipe connects pilot-type relief valve, and high-pressure oil pipe also connects pilot-type relief valve.
4. a kind of novel ultrahigh pressure type pilot hydraulic hand pump according to claim 1, it is characterised in that: the high pressure
Safety valve is arranged in oil inlet pipe, and relief valve is arranged in the flowline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910100457.2A CN109630372B (en) | 2019-01-31 | 2019-01-31 | Novel ultrahigh-pressure pilot-operated hydraulic manual pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910100457.2A CN109630372B (en) | 2019-01-31 | 2019-01-31 | Novel ultrahigh-pressure pilot-operated hydraulic manual pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109630372A true CN109630372A (en) | 2019-04-16 |
| CN109630372B CN109630372B (en) | 2024-01-19 |
Family
ID=66064740
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910100457.2A Active CN109630372B (en) | 2019-01-31 | 2019-01-31 | Novel ultrahigh-pressure pilot-operated hydraulic manual pump |
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| CN (1) | CN109630372B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725784A (en) * | 2019-10-29 | 2020-01-24 | 大连泰凯工业有限公司 | Ultrahigh pressure double-acting manual pump |
| CN114689238A (en) * | 2021-12-30 | 2022-07-01 | 山东省计量科学研究院 | High-pressure self-cleaning table type hydraulic source |
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