CN108644434B - A kind of screw thread inserting type buffering pressure limiting valve - Google Patents
A kind of screw thread inserting type buffering pressure limiting valve Download PDFInfo
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- CN108644434B CN108644434B CN201810401203.XA CN201810401203A CN108644434B CN 108644434 B CN108644434 B CN 108644434B CN 201810401203 A CN201810401203 A CN 201810401203A CN 108644434 B CN108644434 B CN 108644434B
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- valve
- screw thread
- spool
- pressure limiting
- inserting type
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The present invention relates to a kind of screw thread inserting types to buffer pressure limiting valve, belong to hydraulic drive field, it solves existing buffer gear and the existing buffering of accumulator adjusts and install and use inconvenience, to the problem of different system pressure impact matching differences, while it can avoid existing overflow valve pressure limiting and there are problems that draining.A kind of screw thread inserting type buffering pressure limiting valve, screw thread inserting type buffering pressure limiting valve is connect with hydraulic circuit, the spool that screw thread inserting type buffers pressure limiting valve can be in valve body axially movable, it is being shunk by hydraulic action to valve inner the end of spool, adjustment spring is equipped in valve body, adjustment spring generates the active force to the outside of valve body to spool.This structure makes buffering pressure limiting valve have buffering and pressure limiting dual function, easy to adjust, applied widely, more matches with system shock characteristic, oil liquid pressure is limited by the way of non-draining, while having the function of certain pressure instruction.
Description
Technical field
The present invention relates to hydraulic transmission technology fields more particularly to a kind of screw thread inserting type to buffer pressure limiting valve.
Background technique
Alternating load, frequently commutation, high-speed motion, inertia impact, flow pulsation can cause stress punching to hydraulic system
It hits, excessive compression shock is likely to result in the adverse effects such as structural damage, seal failure and operation shakiness.To solve pressure
Impact, the problems such as pressure is excessive, frequently with measures such as setting buffer gear, accumulators in engineering, but existing buffer gear is general
It is built in executive component closed cavity, there is the problems such as adjusting is inconvenient, matching is poor, accumulator is generally only buffered, stored up
Can use, volume is larger, pressure adjust and working service not aspect.
The influence that pressure changes vulnerable to oil liquid temperature in hydraulic system closed cavity, oil liquid temperature rise will cause closing when larger
Cavity pressure is excessive, and to limit closing chamber maximum pressure, overflow valve often is arranged in closing chamber, and pressure is excessive to cause overflow valve to open,
Closing cavity pressure is reduced in a manner of draining, but after closing chamber oil liquid temperature reduces, oil liquid is passed through overflow by cold events in addition
Valve releases a part of oil liquid, under cooling and draining joint effect, closing chamber pressure reduction, or even parital vacuum is formed, work as pressure
When power is reduced to the air separation pressure of oil liquid or less, the air being dissolved in oil liquid is precipitated, and will lead to the reduction of oil liquid rigidity, system
Operation stability decline can cause cavitation erosion, vibration and noise when serious.
Summary of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of screw thread inserting type buffers pressure limiting valve, it is existing slow to solve
Punch mechanism and the existing buffering of accumulator adjust and install and use inconvenience, ask different system pressure impact matching differences
Topic, while can avoid existing overflow valve pressure limiting and there are problems that draining.
The purpose of the present invention is mainly achieved through the following technical solutions:
A kind of screw thread inserting type buffering pressure limiting valve, screw thread inserting type buffering pressure limiting valve are connect with hydraulic circuit, screw thread
Plug-in buffer pressure limiting valve spool can in valve body axially movable, the end of spool by hydraulic action into valve body
Portion is shunk, and adjustment spring is equipped in valve body, and adjustment spring generates the active force to the outside of valve body to spool.
Screw thread inserting type buffers pressure limiting valve further include: valve deck, valve pocket；Adjustment spring includes: coarse adjustment spring and fine tuning spring；
Valve body is cylindrical tube, and one end far from hydraulic circuit is equipped with internal screw thread and external screw thread；Valve body by internal screw thread with
Valve pocket is threadedly coupled；Valve body is connect by external screw thread with valve deck；The end that valve body connects one end of hydraulic circuit is equipped with inside
Stop collar；
Spool main body is towards the stepped stem reduced far from hydraulic circuit orient diameter, including the level-one bar that is relatively large in diameter and straight
The lesser second level bar of diameter, and valve pocket is passed through, the end close to hydraulic circuit direction is disk；The end of spool is arranged in coarse adjustment spring
Between portion and valve pocket, and spool main body passes through coarse adjustment spring, and the end disc of spool abuts on the stop collar.
Screw thread inserting type buffers pressure limiting valve further include: adjusting nut；
Valve deck is equipped with tapped through hole far from one end of hydraulic circuit；Adjusting nut is equipped with outer spiral shell close to one end of hydraulic circuit
Line, and be threadedly coupled with the tapped through hole of valve deck；Adjusting nut is equipped with through-hole far from one end of hydraulic circuit, and spool main body passes through
Adjusting nut, and second level bar is equipped with scale；
Fine tuning spring is arranged in the variable diameter step between the level-one bar of spool and second level bar and between adjusting nut, and spool
Main body passes through fine tuning spring.
Clearance fit is formed between the end and valve body of spool, and the side of the end disc of spool is equipped with valve body wear ring
It is enclosed with lattice；The end of spool can be slided in the inner sealing of valve body.
The middle part in the outside of valve pocket is equipped with external screw thread, and the female thread of one end with valve body far from hydraulic circuit connects at screw thread
It connects；
The both ends of valve pocket are equipped with circular counter bore, and two counterbore bottom walls pass through intermediate through-hole connection；The main body of spool
Clearance fit is formed between step bars upper level bar and the through-hole of valve pocket, and the inner sidewall of through-hole is equipped with valve pocket wear ring and this
Spy's envelope；The level-one bar of the step bars of the main body of spool seals sliding in the through-hole of valve pocket.
At least three tapped through hole is along the circumferential direction laid on the end face of the end disc of spool, and each screw thread is logical
A damper is equipped in hole, each damper is equipped with external screw thread, and is threadedly coupled with tapped through hole formation.
Valve body close to one end of hydraulic circuit external screw thread and middle part intersection be equipped with escape；Peace is equipped in escape
Fill O-ring seal.
Valve pocket forms clearance fit between one end and valve body of hydraulic circuit；Side of the valve pocket close to hydraulic circuit one end
Wall is equipped with valve pocket O-ring；Valve pocket is close to hydraulic circuit one end and valve seal.
Screw thread inserting type buffers pressure limiting valve and is equipped with dust cap；
Dust cap is buckled on institute's adjusting nut；The side of dust cap is equipped with annulus, and the outside of valve deck is equipped with annulus, rope or
Chain passes through the annulus of valve deck and the annulus of dust cap, connects dust cap and valve deck.
The radial dimension of lateral wall of radial dimension and adjusting nut of dust cap inner wall is identical, and solid by frictional force
It is fixed；
The outer wall of dust cap is equipped at least one air hole, the space that is connected between dust cap and adjusting nut and dust-proof
The space in the cap external world.
The beneficial effects of the present invention are:
1, the present invention have buffering and pressure limiting dual function, it is easy to adjust, it is applied widely, by adjust buffer volume,
The size of spring force and damping hole can be such that the valve more matches with system shock characteristic, buffering effect can be improved, by spring
Coarse adjustment and fine tuning, can accurately set buffering or pressure limiting pressure；
2, the present invention limits oil liquid pressure in such a way that non-draining, closing cavity volume are with temperature self-adaptation variation, can
Oil liquid rigidity and system run all right is effectively ensured；
3, screw thread inserting type structure of the present invention, hydraulic fluid port installation dimension are easy to install and use with common screw plug；
4, the present invention has the function of pressure instruction, can probably estimate that the surveyed place's pressure of valve, alternative pressure gauge or pressure pass
Sensor meets general pressure monitoring, warning application requirement.
It in the present invention, can also be combined with each other between above-mentioned each technical solution, to realize more preferred assembled schemes.This
Other feature and advantage of invention will illustrate in the following description, also, certain advantages can become from specification it is aobvious and
It is clear to, or understand through the implementation of the invention.The objectives and other advantages of the invention can by specification, claims with
And it is achieved and obtained in specifically noted content in attached drawing.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not to be construed as limiting the invention, in entire attached drawing
In, identical reference symbol indicates identical component.
Fig. 1 is the appearance diagram that a kind of screw thread inserting type buffers pressure limiting valve.
Fig. 2 is the schematic diagram of internal structure that a kind of screw thread inserting type buffers pressure limiting valve.
Appended drawing reference: 1- valve body；2- valve deck；3- valve pocket；4- spool；5- damper；6- adjusting nut；7- dust cap；8-
Coarse adjustment spring；9- fine tuning spring；10- mounting O-shaped sealing ring；11- valve pocket O-ring；12- valve pocket wear ring；The special envelope of 13- Si；14-
Valve body wear ring；15- lattice enclose；16- buffer volume.
Specific embodiment
Specifically describing the preferred embodiment of the present invention with reference to the accompanying drawing, wherein attached drawing constitutes the application a part, and
Together with embodiments of the present invention for illustrating the principle of the present invention, it is not intended to limit the scope of the present invention.
A kind of screw thread inserting type buffers pressure limiting valve, and screw thread inserting type buffering pressure limiting valve is connect with hydraulic circuit can also be with
It is connected with closing chamber, the spool 4 that screw thread inserting type buffers pressure limiting valve can be in valve body 1 axially movable, and the end of spool 4 exists
By hydraulic action to 1 internal contraction of valve body, valve body is interior to be equipped with adjustment spring, and adjustment spring generates to the outer of valve body 1 spool 4
The active force in portion.This structure makes buffering pressure limiting valve have buffering and pressure limiting dual function, easy to adjust, applied widely, leads to
Adjustment adjustment spring is crossed, the valve can be made more to match with system shock characteristic, buffering effect can be improved.In actual use in addition to liquid
Pressure system can generate except the variation of pressure, the liquid in closing chamber also can variation with temperature and produce the variation of pressure, can also
The adjustment of pressure is carried out using buffering pressure limiting valve of the invention.
Screw thread inserting type buffers pressure limiting valve further include: valve deck 2, valve pocket 3；Adjustment spring includes: coarse adjustment spring 8 and fine tuning bullet
Spring 9；
Valve body 1 is cylindrical tube, and one end far from hydraulic circuit is equipped with internal screw thread and external screw thread；Valve body 1 passes through internal screw thread
It is threadedly coupled with valve pocket 3；Valve body 1 is connect by external screw thread with valve deck 2；The end that valve body 1 connects one end of hydraulic circuit is equipped with
Inside stop collar, spool 4 is released out of valve body 1 by coarse adjustment spring 8 when preventing hydraulic circuit pressure too low；
4 main body of spool be towards the stepped stem reduced far from hydraulic circuit orient diameter, including the level-one bar that is relatively large in diameter and
The lesser second level bar of diameter, and valve pocket 3 is passed through, the end close to hydraulic circuit direction is disk；Coarse adjustment spring 8 is arranged in spool
Between 4 end and valve pocket 3, and 4 main body of spool passes through coarse adjustment spring, and the end disc of spool abuts on the stop collar.It adjusts
Threaded connection between whole valve pocket 3 and valve body 1, can be adjusted the precompression of coarse adjustment spring 8, to different types of hydraulic time
Road carries out pressure match.
Screw thread inserting type buffers pressure limiting valve further include: adjusting nut 6；
Valve deck 2 is equipped with tapped through hole far from one end of hydraulic circuit；Adjusting nut 6 is equipped with outer close to one end of hydraulic circuit
Screw thread, and be threadedly coupled with the tapped through hole of valve deck 2；Adjusting nut 6 is equipped with through-hole far from one end of hydraulic circuit, and spool 4 is main
Body passes through adjusting nut 6, and second level bar is equipped with scale, the scale be used to by length that spool 4 is stretched out from adjusting nut 6 come
The distance that spool 4 is pushed by the hydraulic oil in hydraulic circuit is reacted, and is converted into pressure size in turn；It can probably estimate that valve is surveyed
Locate pressure, alternative pressure gauge or pressure sensor, meets general pressure monitoring, warning application requirement.
Fine tuning spring 9 is arranged between the variable diameter step between the level-one bar of spool 4 and second level bar and adjusting nut 6, and
4 main body of spool passes through fine tuning spring 9.It is threadedly coupled between adjustment adjusting nut 6 and valve deck 2, the pre- of fine tuning spring 9 can be adjusted
Pressure further makes to buffer pressure limiting valve and different types of hydraulic circuit carries out pressure match.The rigidity of fine tuning spring 9 is less than thick
Spring 8 is adjusted, therefore, the two is acted on by the precompression on spool 4 by coarse adjustment spring 8 and carries out coarse adjustment, then passes through fine tuning spring 9
Accurately to adjust precompression.
Clearance fit is formed between the end and valve body 1 of spool 4, and the side of the end disc of spool 4 is resistance to equipped with valve body
Bull ring 14 and Ge Lai circle 15；The end of spool 4 can be slided in the inner sealing of valve body 1.
The middle part in the outside of valve pocket 3 is equipped with external screw thread, and the female thread of one end with valve body 1 far from hydraulic circuit is at screw thread
Connection；
The both ends of valve pocket 3 are equipped with circular counter bore, and two counterbore bottom walls pass through intermediate through-hole connection；The main body of spool 4
Step bars upper level bar and valve pocket 3 through-hole between form clearance fit, and the inner sidewall of through-hole is equipped with valve pocket wear ring
12 and Si Te envelope 13；The level-one bar of the step bars of the main body of spool 4 seals sliding in the through-hole of valve pocket 3.
14 collective effect of valve pocket wear ring 12 and valve body wear ring is opposite sliding of the spool 4 in valve body 1 and valve pocket 3
It is oriented to and is supported；If this spy's envelope 13 is only arranged, lattice enclose 15, since the wearability of sealing material is all relatively poor,
In the case that spool 4 needs to move repeatedly, this spy's envelope 13, lattice are easy to wear to enclose 15, reduce whole service life；It is logical
Wear ring is crossed come active force when undertaking spool 4 and other component sliding, alleviates the abrasion of sealing material, therefore be able to extend
The service life of whole equipment.
At least three tapped through hole, preferably 4 are along the circumferential direction laid on the end face of the end disc of spool 4, and
A damper 5 is equipped in each tapped through hole, each damper 5 is equipped with external screw thread, and forms screw thread with tapped through hole
Connection.
Valve body 1 close to one end of hydraulic circuit external screw thread and middle part intersection be equipped with escape；It is equipped in escape
Mounting O-shaped sealing ring 10；External screw thread of the valve body 1 close to one end of hydraulic circuit is used to connect with hydraulic circuit, mounting O-shaped sealing
Circle 10 is used to carry out to guarantee connection sealing.
Valve pocket 3 forms clearance fit between one end and valve body 1 of hydraulic circuit；Valve pocket 3 is close to hydraulic circuit one end
Side wall be equipped with valve pocket O-ring 11；Valve pocket 3 is sealed close to hydraulic circuit one end and valve body 1.
Si Te seals 13, lattice to enclose 15,11 collective effect of valve pocket O-ring, by valve pocket 3 close to the indent of one end of hydraulic circuit
Space, the inside of valve body 1, spool 4 end part seal form buffer volume 16, hydraulic oil is full of buffer volume 16, and passes through resistance
Buddhist nun's device 5 is connected to hydraulic circuit；When the pressure increase of hydraulic circuit, for spool 4 by pushing inside valve body 1, damper 5 can be
Cause to prevent 4 strenuous exercise of spool when pressure change is too fast, guarantee buffering is gone on smoothly with pressure limiting.
Screw thread inserting type buffers pressure limiting valve and is equipped with dust cap 7；It is used for a long time in buffering pressure limiting valve, or is mounted on hydraulic circuit
It when upper, prevented dust from entering buffering pressure limiting valve along the gap between adjusting nut 6 and spool 4, and caused the modification of buffering pressure limiting valve
Or damage.
Dust cap 7 is buckled on institute's adjusting nut 6；The side of dust cap 7 is equipped with annulus, and the outside of valve deck 2 is equipped with annulus, rope
Rope or chain pass through the annulus of valve deck 2 and the annulus of dust cap 7, connect dust cap 7 and valve deck 2, it is sometimes desirable to by observing valve
Core 4 judges to be easy to slide after pressure size, dust cap 7 are taken from the scale of 6 extension of adjusting nut to lose, therefore will
Dust cap 7 is connect with valve deck 2, prevents from losing.
The radial dimension of 7 inner wall of dust cap is identical as the radial dimension of the lateral wall of adjusting nut 6, and solid by frictional force
It is fixed；The outer wall of dust cap 7 is equipped at least one air hole, the space being connected between dust cap 7 and adjusting nut 6 and dust cap
7 extraneous spaces；When spool 4 moves in buffering pressure limiting valve, the air pressure in dust cap 7 will increase or reduce, to influence
The movement of spool 4, furthermore when installing or removing dust cap 7, due to dust cap 7 and adjusting nut 6 be by the fixation that rubs, it is dust-proof
Space between cap 7 and adjusting nut 6 can be because air pressure reason causes dust cap 7 to be difficult to install or remove, and design is ventilative
Hole balances inner and outer air pressure.
Screw thread inserting type buffering pressure limiting valve of the invention is mounted in the form of thread cartridge needs buffering, the system of pressure limiting
On circuit or closing cavity shell, it can require to be adjusted buffering pressure limiting valve according to system pressure impact or pressure limiting: pass through adjusting
The decrement and elastic force of coarse adjustment spring 8 is adjusted in the length of thread engagement of valve pocket 3 and valve body 1, then can be to buffering pressure limiting valve
Compensator or trimmer pressure or pressure limiting pressure carry out coarse adjustment, and by adjusting the length of thread engagement of adjusting nut 6 and valve deck 2, fine tuning is adjusted
The decrement and elastic force of spring 9 then can carry out fine tuning to the compensator or trimmer pressure or pressure limiting pressure for buffering pressure limiting valve, by two bullets
The adjusting of spring decrement is, it can be achieved that the wide scope of valve cushion rigidity or pressure limiting pressure continuously adjusts；By adjust adjust valve pocket 3 with
The size of buffer volume 16 is also adjusted in the length of thread engagement of valve body 1；The damper 5 of different size is installed, damping can be changed
The total flow area in hole, and then the buffer damping of adjustable valve.
Make trimmer valve in use, by the size of adjusting buffer volume 16, spring force and damping hole come the buffering of regulating valve
Pressure, rigidity, damping and speed, adjustable range is wide and easy to adjust, more matches from different system shock characteristics, can integrate and mention
The buffering effect of high threshold.
Make pressure limiting valve in use, valve buffer volume 16 passes through by adjusting two amount of spring compression come regulating valve pressure limiting pressure
5 damping hole of damper connects with connect closed cavity, since there are difference in areas for the disk both sides of the face of spool 4, when by face
When product moment and the pressure that generates are less than the sum of the elastic force of coarse adjustment spring 8 and fine tuning spring 9, spool 4 under spring force, valve
Core 4 moves down, and is crushed on the stop collar of valve body 1, when the pressure generated by difference in areas is greater than coarse adjustment spring 8 and fine tuning bullet
When the sum of the elastic force of spring 9, spool 4 is moved up, and spool 4, which moves up, can be such that the connected closed cavity volume of valve increases, pressure
It reduces.The buffering pressure limiting valve is to limit the intracorporal pressure of closing chamber in a manner of changing closed cavity oil liquid volume, when valve institute
When connecting the raising of closed cavity inner fluid temperature, closed cavity inner fluid pressure increase, when pressure reaches valve pressure limiting pressure, valve
Core 4 moves up, and reduces closing chamber inner fluid pressure, and when the connected closed cavity inner fluid temperature of valve reduces, spool 4 is downward
It is mobile, guarantee pressure in closed cavity, the variation of closed cavity inner fluid temperature is adapted to the movement of spool 4, is adjusted with this
Save closed cavity inner fluid pressure, avoid the occurrence of hypertonia or it is too low phenomena such as.
In conclusion the embodiment of the invention provides a kind of screw thread inserting type buffer pressure limiting valve, the present invention have buffering and
Pressure limiting dual function, it is easy to adjust, it is applied widely, by adjusting buffer volume, the size of spring force and damping hole, this can be made
Valve is more matched with system shock characteristic, and buffering effect can be improved, and by the coarse adjustment and fine tuning to spring, can accurately set buffering
Or pressure limiting pressure；Oil liquid pressure is limited in such a way that non-draining, closing cavity volume are with temperature self-adaptation variation, can effectively be protected
Demonstrate,prove oil liquid rigidity and system run all right；Screw thread inserting type structure, hydraulic fluid port installation dimension is the same as common screw plug, the side of installing and using
Just；Have the function of pressure instruction, can probably estimate the surveyed place's pressure of valve, alternative pressure gauge or pressure sensor, meets general
Pressure monitoring, warning application requirement.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
Claims (9)
1. a kind of screw thread inserting type buffers pressure limiting valve, which is characterized in that the screw thread inserting type buffering pressure limiting valve and hydraulic system
The spool (4) of circuit connection, the screw thread inserting type buffering pressure limiting valve can be in valve body (1) axially movable, the spool
(4) end to valve body (1) internal contraction, is being equipped with adjustment spring, the adjusting bullet by hydraulic action in the valve body (1)
Spring generates the active force to the outside of the valve body (1) to the spool (4)；
The screw thread inserting type buffers pressure limiting valve further include: valve deck (2) and valve pocket (3)；The adjustment spring includes: coarse adjustment spring
(8) and fine tuning spring (9)；
The valve body (1) is cylindrical tube, and one end far from hydraulic circuit is equipped with internal screw thread and external screw thread；The valve body (1) is logical
Internal screw thread is crossed to be threadedly coupled with the valve pocket (3)；The valve body (1) is connect by external screw thread with the valve deck (2)；The valve body
(1) end for connecting one end of hydraulic circuit is equipped with inside stop collar；
The spool (4) passes through the valve pocket (3), and the end close to hydraulic circuit direction is disk；The coarse adjustment spring (8) sets
It sets between the end and valve pocket (3) of spool (4), and the spool (4) main body passes through coarse adjustment spring (8), the spool (4)
End disc abuts on the stop collar.
2. screw thread inserting type according to claim 1 buffers pressure limiting valve, which is characterized in that the screw thread inserting type buffering limit
Pressure valve further include: adjusting nut (6)；
The main body of the spool (4) is towards the stepped stem reduced far from hydraulic circuit orient diameter, including the level-one being relatively large in diameter
Bar and the lesser second level bar of diameter；
The valve deck (2) is equipped with tapped through hole far from one end of hydraulic circuit；The one of the close hydraulic circuit of the adjusting nut (6)
End is equipped with external screw thread, and is threadedly coupled with the tapped through hole of the valve deck (2)；The adjusting nut (6) is far from hydraulic circuit
One end is equipped with through-hole, and spool (4) main body passes through the adjusting nut (6), and second level bar is equipped with scale；
The variable diameter step and adjusting nut that the fine tuning spring (9) is arranged between the level-one bar and second level bar of the spool (4)
(6) between, and the spool (4) main body passes through fine tuning spring (9).
3. screw thread inserting type according to claim 2 buffers pressure limiting valve, which is characterized in that the end of the spool (4) with
Form clearance fit between the valve body (1), and the side of the end disc of the spool (4) be equipped with valve body wear ring (14) and
Lattice enclose (15)；The end of the spool (4) can be slided in the inner sealing of the valve body (1).
4. screw thread inserting type according to claim 3 buffers pressure limiting valve, which is characterized in that the outside of the valve pocket (3)
Middle part is equipped with external screw thread, and the female thread of one end with the valve body (1) far from hydraulic circuit is at threaded connection；
The both ends of the valve pocket (3) are equipped with circular counter bore, and two counterbore bottom walls pass through intermediate through-hole connection；The spool
(4) clearance fit is formed between the step bars upper level bar of main body and the through-hole of the valve pocket (3), and on the inner sidewall of through-hole
Equipped with valve pocket wear ring (12) and this spy's envelope (13)；The level-one bar of the step bars of the main body of the spool (4) is in the valve pocket (3)
Through-hole in sealing sliding.
5. screw thread inserting type according to claim 4 buffers pressure limiting valve, which is characterized in that the end circle of the spool (4)
It is along the circumferential direction laid at least three tapped through hole on the end face of disk, and is equipped with a damper in each tapped through hole
(5), each damper (5) is equipped with external screw thread, and is threadedly coupled with tapped through hole formation.
6. screw thread inserting type according to claim 5 buffers pressure limiting valve, which is characterized in that the valve body (1) is close to hydraulic
The external screw thread of the one end in circuit is equipped with escape with middle part intersection；Mounting O-shaped sealing ring (10) are equipped in the escape.
7. screw thread inserting type according to claim 6 buffers pressure limiting valve, which is characterized in that the valve pocket (3) is close to hydraulic
Clearance fit is formed between the one end in circuit and the valve body (1)；Side wall of the valve pocket (3) close to hydraulic circuit one end is equipped with
Valve pocket O-ring (11)；The valve pocket (3) seals close to hydraulic circuit one end and valve body (1).
8. screw thread inserting type according to claim 7 buffers pressure limiting valve, which is characterized in that the screw thread inserting type buffering limit
Pressure valve is equipped with dust cap (7)；
The dust cap (7) is buckled on institute's adjusting nut (6)；The side of the dust cap (7) is equipped with annulus, the valve deck (2)
Outside be equipped with annulus, rope or chain pass through the annulus of the valve deck (2) and the annulus of dust cap (7), connect described dust-proof
Cap (7) and valve deck (2).
9. screw thread inserting type according to claim 8 buffers pressure limiting valve, which is characterized in that dust cap (7) inner wall
Radial dimension is identical as the radial dimension of lateral wall of the adjusting nut (6), and is fixed by frictional force；
The outer wall of the dust cap (7) is equipped at least one air hole, be connected to the dust cap (7) and adjusting nut (6) it
Between space and dust cap (7) external world space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810401203.XA CN108644434B (en) | 2018-04-28 | 2018-04-28 | A kind of screw thread inserting type buffering pressure limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810401203.XA CN108644434B (en) | 2018-04-28 | 2018-04-28 | A kind of screw thread inserting type buffering pressure limiting valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108644434A CN108644434A (en) | 2018-10-12 |
| CN108644434B true CN108644434B (en) | 2019-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810401203.XA Active CN108644434B (en) | 2018-04-28 | 2018-04-28 | A kind of screw thread inserting type buffering pressure limiting valve |
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| Country | Link |
|---|---|
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| CN109668679B (en) * | 2019-01-29 | 2023-11-03 | 中国石油集团川庆钻探工程有限公司 | Multistage buffering isolation device for quartz crystal pressure gauge sensor |
| CN110541955B (en) * | 2019-10-08 | 2024-01-26 | 永一阀门集团有限公司 | High-temperature high-pressure safety valve |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB583858A (en) * | 1943-11-30 | 1947-01-01 | Westinghouse Air Brake Co | Improvements relating to hydraulic accumulators |
| JPH0648001B2 (en) * | 1984-10-19 | 1994-06-22 | 日本電装株式会社 | Aki Yum Reta |
| DE3538120A1 (en) * | 1985-10-26 | 1987-04-30 | Teves Gmbh Alfred | PRESSURE SUPPLY SYSTEM, ESPECIALLY FOR MOTOR VEHICLE BRAKE SYSTEMS |
| DE19822092A1 (en) * | 1998-05-16 | 1999-11-18 | Zf Luftfahrttechnik Gmbh | Hydraulic pressure accumulator system with cylinder piston |
| CN201258878Y (en) * | 2008-08-26 | 2009-06-17 | 上海汇益液压控制系统工程有限公司 | Spring type energy accumulator in hydraulic system of steam turbine |
| KR101720965B1 (en) * | 2009-10-19 | 2017-03-29 | 하이댁 테크놀로지 게엠베하 | Device for the pulsed release of an amount of fluid which can be stored in an accumulator housing |
| US9145902B2 (en) * | 2010-10-08 | 2015-09-29 | GM Global Technology Operations LLC | Hydraulic accumulator |
| CN201902389U (en) * | 2010-12-22 | 2011-07-20 | 山东法因数控机械股份有限公司 | Hydraulic oil return buffer |
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