CN205278474U - Pressurized construction of overflow valve - Google Patents
Pressurized construction of overflow valve Download PDFInfo
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- CN205278474U CN205278474U CN201521102569.5U CN201521102569U CN205278474U CN 205278474 U CN205278474 U CN 205278474U CN 201521102569 U CN201521102569 U CN 201521102569U CN 205278474 U CN205278474 U CN 205278474U
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Abstract
The utility model discloses a pressurized construction of overflow valve, including the disk seat and assemble the valve body on the disk seat, be provided with pressure import and the pressure export that two symmetries set up on the valve body, be provided with the case in the valve body, the orifice has been offered to the axial on this case, is provided with the spring holder in the disk seat, the case and be provided with poppet spring between the spring holder, still be provided with cone valve core, piston and guide's disk seat in the disk seat, this guide's disk seat stretches out outside the disk seat, the center of guide's disk seat is provided with guide's pressure input port, the cone valve core with the spring holder offsets and cooperates, is provided with the piston spring between cone valve core and the piston. 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 interim pressure boost, its compact structure, convenient to use can satisfy under the special operating mode demand that needs improve operating pressure temporarily.
Description
Technical field
This utility model relates to overflow valve manufacturing technology field, especially the pressurized construction of a kind of 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 rational in infrastructure, compact, easy to use, and reliability is high, it is possible to realize the pressurized construction of a kind of overflow valve of interim supercharging.
The technical scheme that the above-mentioned technical problem of this utility model solution adopts is:
A kind of pressurized construction of overflow valve, include valve seat and the valve body being assemblied on valve seat, valve body is provided with a pressure inlets and two symmetrically arranged pressure exports, spool it is provided with in valve body, this spool axially offers throttle orifice, it is provided with spring base in valve seat, between spool and described spring base, is provided with valve core spring; Being additionally provided with poppet valve core, piston and guide's valve seat in valve seat, this guide's valve seat stretches out outside described valve seat, guide's valve seat be provided centrally with pilot pressure input port, poppet valve core offsets with described spring base and coordinates, and is provided with piston spring between poppet valve core and piston.
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 inlet side expansion of above-mentioned relief hole is shaped with cushion hole.
The inner of above-mentioned pilot pressure input port is provided with flaring enlarging.
Above-mentioned valve seat is by 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.
The pressurized construction of a kind of 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 interim 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, first oil film groove 21, valve core spring 3, spring base 4, relief hole 4a, cushion hole 4b, 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 pressurized construction of overflow valve, include valve seat and the valve body 1 being assemblied on valve seat, valve body 1 is provided with a pressure inlets 1a and two symmetrically arranged pressure export 1b, spool 2 it is provided with in valve body 1, this spool 2 axially offers throttle orifice 2a, it is provided with spring base 4 in valve seat, between described spool 2 and described spring base 4, is provided with valve core spring 3; Poppet valve core 8, piston 6 and guide's valve seat 7 it is additionally provided with in valve seat, this guide's valve seat 7 stretches out outside described valve seat, guide's valve seat 7 be provided centrally with pilot pressure input port 71, poppet valve core 8 offsets with described spring base 4 and coordinates, and is provided with piston spring 5 between poppet valve core 8 and piston 6.
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 inlet side expansion of relief hole 4a is shaped with cushion hole 4b.
The setting of cushion hole 4b, makes pressure oil when flowing into relief hole 4a, 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 by the first valve seat the 91, first locking nut the 92, second valve seat 93 and the second locking nut 94 assembled successively; 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 (8)
1. the pressurized construction of an overflow valve, include valve seat and the valve body (1) being assemblied on valve seat, it is characterized in that: described valve body (1) is provided with a pressure inlets (1a) and two symmetrically arranged pressure exports (1b), it is provided with spool (2) in described valve body (1), this spool (2) axially offers throttle orifice (2a), it is provided with spring base (4) in described valve seat, between described spool (2) and described spring base (4), is provided with valve core spring (3); Poppet valve core (8), piston (6) and guide's valve seat (7) it is additionally provided with in described valve seat, this guide's valve seat (7) stretches out outside described valve seat, described guide's valve seat (7) be provided centrally with pilot pressure input port (71), described poppet valve core (8) offsets with described spring base (4) and coordinates, and is provided with piston spring (5) between described poppet valve core (8) and piston (6); Described spring base (4) axially offers relief hole (4a), offering pressure relief opening (41) on the sidewall of described spring base (4), the inlet side expansion of described relief hole (4a) is shaped with cushion hole (4b).
2. the pressurized construction of a kind of overflow valve according to claim 1, it is characterized in that: described 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. the pressurized construction of a kind of overflow valve according to claim 2, is characterized in that: the inner of described pilot pressure input port (71) is provided with flaring enlarging (71a).
4. the pressurized construction of a kind of overflow valve according to claim 3, is characterized in that: described valve seat is by 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.
5. the pressurized construction of a kind of overflow valve according to claim 4, 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).
6. the pressurized construction of a kind of overflow valve according to claim 5, is characterized in that: described spool (2) periphery offers the first oil film groove (21).
7. the pressurized construction of a kind of overflow valve according to claim 6, is characterized in that: offer the second oil film groove (61) outside described piston (6).
8. the pressurized construction of a kind of overflow valve according to claim 7, is characterized in that: be provided with the 3rd sealing ring (42) between described spring base (4) and described spool (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521102569.5U CN205278474U (en) | 2015-12-28 | 2015-12-28 | Pressurized construction of overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521102569.5U CN205278474U (en) | 2015-12-28 | 2015-12-28 | Pressurized construction of overflow valve |
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| Publication Number | Publication Date |
|---|---|
| CN205278474U true CN205278474U (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521102569.5U Active CN205278474U (en) | 2015-12-28 | 2015-12-28 | Pressurized construction of overflow valve |
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| CN (1) | CN205278474U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218419A (en) * | 2017-06-01 | 2017-09-29 | 上海航天控制技术研究所 | A kind of small interior leakage direct-acting overflow valve of big flow |
| CN108167256A (en) * | 2017-12-28 | 2018-06-15 | 邵立坤 | A kind of plug-in trimmer valve |
| CN110748682A (en) * | 2019-07-22 | 2020-02-04 | 宜宾三江机械有限责任公司 | Safety valve with pilot structure |
| CN112923108A (en) * | 2021-03-10 | 2021-06-08 | 力源液压（苏州）有限公司 | Pilot pressurizing two-stage overflow valve |
| CN114688322A (en) * | 2022-04-28 | 2022-07-01 | 靖江市新博液压件有限公司 | High-efficient type overflow valve and overflow valve dismantlement structure |
-
2015
- 2015-12-28 CN CN201521102569.5U patent/CN205278474U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218419A (en) * | 2017-06-01 | 2017-09-29 | 上海航天控制技术研究所 | A kind of small interior leakage direct-acting overflow valve of big flow |
| CN108167256A (en) * | 2017-12-28 | 2018-06-15 | 邵立坤 | A kind of plug-in trimmer valve |
| CN110748682A (en) * | 2019-07-22 | 2020-02-04 | 宜宾三江机械有限责任公司 | Safety valve with pilot structure |
| CN112923108A (en) * | 2021-03-10 | 2021-06-08 | 力源液压（苏州）有限公司 | Pilot pressurizing two-stage overflow valve |
| CN114688322A (en) * | 2022-04-28 | 2022-07-01 | 靖江市新博液压件有限公司 | High-efficient type overflow valve and overflow valve dismantlement structure |
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