CN205371160U - Pressure boost overflow valve - Google Patents

Pressure boost overflow valve Download PDF

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Publication number
CN205371160U
CN205371160U CN201521102581.6U CN201521102581U CN205371160U CN 205371160 U CN205371160 U CN 205371160U CN 201521102581 U CN201521102581 U CN 201521102581U CN 205371160 U CN205371160 U CN 205371160U
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China
Prior art keywords
valve seat
pressure
valve
spring
piston
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Active
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CN201521102581.6U
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Chinese (zh)
Inventor
包宇垚
韩龙春
王星
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Saikesi Hydraulic Technology Co Ltd
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Saikesi Hydraulic Technology Co Ltd
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Priority to CN201521102581.6U priority Critical patent/CN205371160U/en
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Abstract

The utility model discloses a pressure boost overflow valve, including the disk seat and assemble the valve body on the disk seat, be provided with pressure import and pressure export on the valve body, be provided with the case in the valve body, the orifice has been offered to the axial on this case, and the case offsets with poppet spring's one end, poppet spring's the other end and the one end counterbalance of installing the spring holder on the disk seat, the other end of spring holder cooperatees with the one end of piston spring, the other end and the piston of piston spring offset, and the outside of piston is provided with guide's disk seat, and the center of this guide's disk seat is provided with guide's pressure input port. The utility model has the advantages of: through the input of precompression, the pressure when making the case move to right is greater than set pressure to realize the purpose of of short duration pressure boost, its compact structure, convenient to use can satisfy under the special operating mode demand that needs improve operating pressure temporarily.

Description

A kind of supercharging overflow valve
Technical field
This utility model relates to overflow valve manufacturing technology field, especially a kind of supercharging overflow valve, and it is suitable in the hydraulic system of engineering machinery.
Background technology
Overflow valve is that a kind of hydraulic pressure controls valve, acts primarily as level pressure overflow effect, play the effect of voltage stabilizing, system unloaded and safeguard protection in hydraulic test.Can, in many hydraulic systems, overflow valve plays an important role more, the quality of its performance and stable operation will be directly connected to the operation of whole hydraulic system.
In the hydraulic system of engineering machinery, overflow valve just serves important pressure stabilization function, and the working pressure of current most of its uses of engineering machinery has just done setting when dispatching from the factory, and namely has fixing pressure during its work, generally, this operating pressure can meet user demand.But, under the operating mode that some are special, then need more high workload pressure, current solution is exactly that the engineering machinery calling more high workload pressure completes, this can be greatly increased the engineering time, increase cost, also can delay the substantial amounts of time in rescue and relief work process, cause the loss of people's life and property.
Summary of the invention
Technical problem to be solved in the utility model is the present situation for prior art, it is provided that compact conformation, easy to use, and reliability is high, it is possible to realize a kind of supercharging overflow valve of of short duration supercharging.
The technical scheme that the above-mentioned technical problem of this utility model solution adopts is:
A kind of supercharging overflow valve, include valve seat and the valve body being assemblied on valve seat, valve body is provided with pressure inlets and pressure export, spool it is provided with in valve body, this spool axially offers throttle orifice, one end of spool and valve core spring offsets, one end of the other end of valve core spring and the spring base being installed on valve seat offsets, the other end of described spring base matches with one end of piston spring, the other end of described piston spring and piston offset, the arranged outside of piston has guide's valve seat, this guide's valve seat be provided centrally with pilot pressure input port.
The technical measures optimized also include:
Being provided with poppet valve core between above-mentioned spring base and piston spring, this poppet valve core is made up of conical head and center-pole, and conical head and described spring base offset, and piston spring is placed on outside described center-pole.
Above-mentioned spring base axially offers relief hole, the sidewall of spring base offers pressure relief opening.
The both sides of above-mentioned throttle orifice are provided with cushion hole, and the diameter of cushion hole is more than the diameter of described throttle orifice.
The inner of above-mentioned pilot pressure input port is provided with flaring enlarging.
Above-mentioned valve seat is made up of the first valve seat assembled successively, the first locking nut, the second valve seat and the second locking nut;Second valve seat stretches in described first valve seat, and the first locking nut is placed on outside described second valve seat, and guide's valve seat stretches in described second valve seat, and the second locking nut is placed on outside described guide's valve seat.
It is provided with the first sealing ring between the first above-mentioned valve seat and the first locking nut;It is provided with the second sealing ring between guide's valve seat and described second valve seat.
Above-mentioned spool periphery offers the first oil film groove.
The second oil film groove is offered outside above-mentioned piston.
The 3rd sealing ring it is provided with between above-mentioned spring base and described spool.
A kind of supercharging overflow valve of the present utility model, by valve body inner spool and pressure inlets, pressure export coordinate the opening and closing realizing overflow valve, when pressure in the pressure of pressure inlets is more than spool, spool moves right, overflow valve is opened, at this moment open the setting pressure that pressure is overflow valve.It addition, this overflow valve arranges piston spring, piston and guide's valve seat at the opposite side of spring base, inputting precompression by the pilot pressure input port on guide's valve seat, this pressure transmission acts on spool again through valve core spring to spring base;By the input of precompression, pressure when making spool move to right is more than setting pressure, thus realizing the purpose of of short duration supercharging.This utility model compact conformation, easy to use, it is possible to meet needs under special operation condition and improve the demand of operating pressure temporarily.
Accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present utility model;
Fig. 2 is A portion enlarged drawing in Fig. 1;
Fig. 3 is B portion enlarged drawing in Fig. 1;
Fig. 4 is C portion enlarged drawing in Fig. 1.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, this utility model is described in further detail.
It is structural representation of the present utility model as shown in Figures 1 to 4,
Accompanying drawing therein is labeled as: valve body 1, pressure inlets 1a, pressure export 1b, spool 2, throttle orifice 2a, cushion hole 2b, first oil film groove 21, valve core spring 3, spring base 4, relief hole 4a, pressure relief opening 41, 3rd sealing ring 42, piston spring 5, piston 6, second oil film groove 61, guide's valve seat 7, pilot pressure input port 71, enlarging 71a, poppet valve core 8, conical head 81, center-pole 82, first valve seat 91, first locking nut 92, second valve seat 93, second locking nut 94, first sealing ring 95, second sealing ring 96.
As shown in Figures 1 to 4,
A kind of supercharging overflow valve, include valve seat and the valve body 1 being assemblied on valve seat, valve body 1 is provided with pressure inlets 1a and pressure export 1b, spool 2 it is provided with in valve body 1, this spool 2 axially offers throttle orifice 2a, one end of spool 2 and valve core spring 3 offsets, one end of the other end of valve core spring 3 and the spring base 4 being installed on valve seat offsets, the other end of described spring base 4 matches with one end of piston spring 5, the other end of described piston spring 5 and piston 6 offset, the arranged outside of piston 6 has guide's valve seat 7, this guide's valve seat 7 be provided centrally with pilot pressure input port 71.
In embodiment, being provided with poppet valve core 8 between spring base 4 and piston spring 5, this poppet valve core 8 is made up of conical head 81 and center-pole 82, and conical head 81 and described spring base 4 offset, and piston spring 5 is placed on outside described center-pole 82.
In embodiment, spring base 4 axially offers relief hole 4a, the sidewall of spring base 4 offers pressure relief opening 41.
Arranging relief hole 4a and pressure relief opening 41 can play a protective role, when the pressure of intracavity is excessive, pressure oil can pass through relief hole 4a and enter in spring base 4, and overcomes the elastic force of piston spring 5 to push poppet valve core 8 open, finally discharges from pressure relief opening 41.
In embodiment, the both sides of throttle orifice 2a are provided with cushion hole 2b, the diameter of the cushion hole 2b diameter more than described throttle orifice 2a.
The setting of cushion hole 2b, makes pressure oil when flowing in and out throttle orifice 2a, it is possible to effectively to be cushioned, it is to avoid the pouring in of moment of pressure oil and cause local pressure excessive and affect the properly functioning of overflow valve.
In embodiment, the inner of pilot pressure input port 71 is provided with flaring enlarging 71a.The setting of enlarging 71a can increase the contact surface of guide oil and piston 6, thus improving precompression.
In embodiment, valve seat is made up of first valve seat the 91, first locking nut the 92, second valve seat 93 assembled successively and the second locking nut 94;Second valve seat 93 stretches in described first valve seat 91, and the first locking nut 92 is placed on outside described second valve seat 93, and guide's valve seat 7 stretches in described second valve seat 93, and the second locking nut 94 is placed on outside described guide's valve seat 7.
Valve seat adopts segment type structure, and the parts at rear insert in the parts in front, make the structure between all parts more compact.
In embodiment, between the first valve seat 91 and the first locking nut 92, it is provided with the first sealing ring 95;It is provided with the second sealing ring 96 between guide's valve seat 7 and described second valve seat 93.
In embodiment, spool 2 periphery offers the first oil film groove 21.
In embodiment, outside piston 6, offer the second oil film groove 61.
The setting of the first oil film groove 21 and the second oil film groove 61, is conducive to the generation of oil film, and the formation of oil film can effectively reduce the frictional force between parts, so that the slip of spool 2, piston 6 is more smooth and easy, and then makes the control of overflow valve more sensitive.
In embodiment, between spring base 4 and described spool 2, it is provided with the 3rd sealing ring 42.
Operation principle:
As it is shown in figure 1, the left side of spring base 4 is provided with valve body 1, valve body 1 is provided with pressure inlets 1a and pressure export 1b, is provided with spool 2 in valve body 1, between spool 2 and spring base 4, is provided with valve core spring 3;By spool 2 and pressure inlets 1a, pressure export 1b coordinate the opening and closing realizing pressure export 1b, namely realize the opening and closing of overflow valve.
When spool 2 is positioned at left end, being blocked by spool 2 between pressure inlets 1a and pressure export 1b, overflow valve cuts out.When pressure oil enters from pressure inlets 1a, and enter in spool from the throttle orifice 2a spool 2, at this moment the inside and outside of spool 2 can form Pressure Drop, when the difference of outside pressure and inside pressure is more than setting value, the elastic force overcoming valve core spring 3 is moved right by spool 2, at this moment turning between pressure inlets 1a and pressure export 1b, overflow valve is opened, and pressure oil flows out from pressure export 1b.Now, the operating pressure of overflow valve is the rated pressure under general operating mode, and in the present embodiment, the rated pressure under general operating mode is 32MPa.
This overflow valve is additionally provided with poppet valve core 8, piston spring 5, piston 6 and guide's valve seat 7 on the right side of spring base 4, guide's valve seat 7 be provided centrally with pilot pressure input port 71.Guide oil forms precompression from pilot pressure input port 71 input.
Guide oil enters pilot pressure input port 71 and acts on lower piston 6, piston 6 compression piston spring 5 is made to do work, the elastic force of piston spring 5 remakes for poppet valve core 8, it is transferred to spring base 4 again, by the progressively transmission of power, final power acts on spool 2 by valve core spring 3, and this power formed by guide oil is precompression, and the direction of this precompression is to the left.
Having precompression to deposit in case, when overflow valve is opened, spool 2 move to right the elastic force not only overcoming valve core spring 3, also simultaneously need to overcome the precompression that guide oil is formed, therefore operating pressure at this moment is both sums;In the present embodiment, the guide's oil pressure inputted is 4MPa, and due to the energy loss in acting process, the precompression formed is 3MPa, and operating pressure at this moment is 35MPa, and namely the rated pressure under this overflow valve special operation condition is 35MPa.And the operating pressure of overflow valve brings up to 35MPa from 32MPa, its service behaviour will promote 7%.
This overflow valve forms precompression by inputting guide oil, it is achieved the temporary transient lifting of overflow valve operating pressure, it is possible to meet the provisional demand under special operation condition very well.
Most preferred embodiment of the present utility model illustrates, those of ordinary skill in the art the various changes made or remodeling are all without departing from scope of the present utility model.

Claims (10)

1. a supercharging overflow valve, include valve seat and the valve body (1) being assemblied on valve seat, described valve body (1) is provided with pressure inlets (1a) and pressure export (1b), it is characterized in that: in described valve body (1), be provided with spool (2), this spool (2) axially offers throttle orifice (2a), one end of described spool (2) and valve core spring (3) offsets, one end of the other end of described valve core spring (3) and the spring base (4) being installed on valve seat offsets, the other end of described spring base (4) matches with one end of piston spring (5), the other end of described piston spring (5) and piston (6) offset, the arranged outside of described piston (6) has guide's valve seat (7), this guide's valve seat (7) be provided centrally with pilot pressure input port (71).
2. a kind of supercharging overflow valve according to claim 1, it is characterized in that: between described spring base (4) and piston spring (5), be provided with poppet valve core (8), this poppet valve core (8) is made up of conical head (81) and center-pole (82), described conical head (81) and described spring base (4) offset, and described piston spring (5) is placed on described center-pole (82) outward.
3. a kind of supercharging overflow valve according to claim 2, is characterized in that: axially offer relief hole (4a) on described spring base (4), the sidewall of described spring base (4) offers pressure relief opening (41).
4. a kind of supercharging overflow valve according to claim 3, it is characterized in that: the both sides of described throttle orifice (2a) are provided with cushion hole (2b), the diameter of described cushion hole (2b) diameter more than described throttle orifice (2a).
5. a kind of supercharging overflow valve according to claim 4, is characterized in that: the inner of described pilot pressure input port (71) is provided with flaring enlarging (71a).
6. a kind of supercharging overflow valve according to claim 5, is characterized in that: described valve seat is made up of the first valve seat (91) assembled successively, the first locking nut (92), the second valve seat (93) and the second locking nut (94);Described the second valve seat (93) stretches in described first valve seat (91), described the first locking nut (92) is placed on described second valve seat (93) outward, described guide's valve seat (7) stretches in described second valve seat (93), and described the second locking nut (94) is placed on described guide's valve seat (7) outward.
7. a kind of supercharging overflow valve according to claim 6, is characterized in that: be provided with the first sealing ring (95) between described the first valve seat (91) and the first locking nut (92);It is provided with the second sealing ring (96) between described guide's valve seat (7) and described second valve seat (93).
8. a kind of supercharging overflow valve according to claim 7, is characterized in that: described spool (2) periphery offers the first oil film groove (21).
9. a kind of supercharging overflow valve according to claim 8, is characterized in that: offer the second oil film groove (61) outside described piston (6).
10. a kind of supercharging overflow valve according to claim 9, is characterized in that: be provided with the 3rd sealing ring (42) between described spring base (4) and described spool (2).
CN201521102581.6U 2015-12-28 2015-12-28 Pressure boost overflow valve Active CN205371160U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201521102581.6U CN205371160U (en) 2015-12-28 2015-12-28 Pressure boost overflow valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201521102581.6U CN205371160U (en) 2015-12-28 2015-12-28 Pressure boost overflow valve

Publications (1)

Publication Number Publication Date
CN205371160U true CN205371160U (en) 2016-07-06

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105422537A (en) * 2015-12-28 2016-03-23 赛克思液压科技股份有限公司 Pressure-increasing overflow valve
CN107631041A (en) * 2017-11-08 2018-01-26 宁波文泽机电技术开发有限公司 A kind of ratio one-way flow valves of double-direction control
CN109058213A (en) * 2018-11-05 2018-12-21 李军 A kind of valve

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105422537A (en) * 2015-12-28 2016-03-23 赛克思液压科技股份有限公司 Pressure-increasing overflow valve
CN105422537B (en) * 2015-12-28 2017-04-26 赛克思液压科技股份有限公司 Pressure-increasing overflow valve
CN107631041A (en) * 2017-11-08 2018-01-26 宁波文泽机电技术开发有限公司 A kind of ratio one-way flow valves of double-direction control
CN107631041B (en) * 2017-11-08 2019-05-21 江苏华展石油机械有限公司 A kind of ratio one-way flow valves of double-direction control
CN109058213A (en) * 2018-11-05 2018-12-21 李军 A kind of valve
CN109058213B (en) * 2018-11-05 2019-12-03 万静琼 A kind of valve

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