CN203614488U - Direct-acting overflow valve - Google Patents
Direct-acting overflow valve Download PDFInfo
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- CN203614488U CN203614488U CN201320666291.9U CN201320666291U CN203614488U CN 203614488 U CN203614488 U CN 203614488U CN 201320666291 U CN201320666291 U CN 201320666291U CN 203614488 U CN203614488 U CN 203614488U
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- valve
- pressure adjusting
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- spring
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Abstract
The utility model discloses a direct-acting overflow valve, relates to the field of flow control, and solves the problem that an existing overflow valve is small in pressure adjusting scope. The overflow valve comprises a valve body, a valve element component and a pressure adjusting mechanism, wherein the valve element component and the pressure adjusting mechanism are located in the valve body, and an oil inlet and an oil overflow port are formed in the front end of the valve body; the valve element component comprises a valve element, a valve seat and a valve rod, wherein the valve rod is arranged in the cavity of a front end cover of the valve body and is connected with an auxiliary spring; the pressure adjusting mechanism comprises a pressure adjusting spring and a pressure adjusting screw, wherein the pressure adjusting spring and the pressure adjusting screw are arranged in the valve body, one end of the pressure adjusting spring and the valve seat are fixed, and the other end of the pressure adjusting spring is connected with the pressure adjusting screw; the pressure adjusting screw penetrates through a rear end cover of the valve body and is connected with the rear end cover of the valve body in a threaded way, a hand wheel is arranged at the tail end of the pressure adjusting screw, and the pressure adjusting screw can be driven to compress the pressure adjusting spring by rotating the hand wheel; when a hydraulic driving valve element is started, the maximum pressure preset valve of the overflow valve is formed by the compression pre-stress of the pressure adjusting spring and the stretching pre-stress of the auxiliary spring, so that the maximum pressure preset valve of the overflow valve can be enhanced by the additionally arranged auxiliary spring, and the pressure adjusting scope and using scope of the overflow valve can be expanded.
Description
Technical field
The utility model relates to flow control field, is specifically related to a kind of range of regulation wide, uses range high, the direct-acting overflow valve that adaptability is stronger.
Background technique
The function of relief valve is by valve port overflow, makes the pressure in controlled system or loop keep stable, realizes the effect of voltage stabilizing, pressure regulation or pressure limiting.According to structure, relief valve has two kinds of direct-acting type and leading types, for direct-acting overflow valve, when pressure is higher, flow is when larger, requires pressure adjusting spring to have very large rigidity, adjusting function is poor, and the leakage of guiding valve also makes high voltage control be difficult to realize, therefore can only be used for low-pressure low flow occasion.Therefore, pressure regulation range is the important performance indexes of relief valve, and conventionally, the range size of relief valve institute pilot pressure is to be determined by the rigidity of spring and pre compressed magnitude, but, due to the restriction of valve body structure and spring performance, the pre compressed magnitude of a spring can not unrestrictedly increase, therefore, the range of regulation that adopts traditional relief valve of this structure is all conditional, thus, caused relief valve to use range low, the defect of bad adaptability.
Model utility content
The defect existing in order to solve above-mentioned technology, the utility model provides a kind of range of regulation wide, uses range high, the direct-acting overflow valve that adaptability is stronger.
The utility model is realized the technological scheme that above-mentioned technique effect adopts:
A kind of direct-acting overflow valve, comprise valve body, be positioned at mangetic core assembly and the pressure-regulating device of described valve body, the front end of described valve body is provided with filler opening and oil spilling mouth, the valve seat that described mangetic core assembly comprises spool and offsets with described spool, described pressure-regulating device comprises the pressure adjusting spring and the screw press that are located in described valve body, wherein, described mangetic core assembly also comprises the valve rod being connected with described spool, described valve rod is located in the front cover cavity of described valve body, and the described valve rod the other end is connected with secondary spring.
Above-mentioned a kind of direct-acting overflow valve, the front end of described valve rod is tapered, and the rear end of described valve rod is provided with groove.
Above-mentioned a kind of direct-acting overflow valve, described secondary spring is placed in the groove of described valve rod rear end.
Above-mentioned a kind of direct-acting overflow valve, forms fluid passage between the fore end outer circumference face of described valve rod and the cavity inner wall of described front cover, described filler opening and the conducting of described fluid passage.
Above-mentioned a kind of direct-acting overflow valve, described screw press runs through the rear end cover of described valve body and is threaded with it, and one end that described screw press stretches into described valve body is socketed with spring seat, and the other end of described screw press is provided with handwheel.
Above-mentioned a kind of direct-acting overflow valve, described pressure adjusting spring one end and described valve seat are fixed, and the other end is connected with described spring seat.
Above-mentioned a kind of direct-acting overflow valve, described spool is located at the connectivity part between described filler opening and described oil spilling mouth.
The beneficial effects of the utility model are: this direct-acting overflow valve has been set up secondary spring to spool, in the time that hydraulic driving spool is opened, together with the stretching prestressing force of the compression prestress of pressure adjusting spring and secondary spring, form the pressure maximum predefined value of relief valve, the secondary spring of setting up has been strengthened the pressure maximum predefined value of relief valve, has expanded the range of regulation of relief valve and has used range.In addition, secondary spring is located in front cover, in realizing this effect of expansion relief valve pressure regulating scope, does not increase the internal structure complexity of relief valve.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
In figure: 1-valve body, 2-rear end cover, 3-front cover, 4-spool, 5-valve rod, 6-screw press, 7-handwheel, 8-spring seat, 9-pressure adjusting spring, 10-valve seat, 11-secondary spring, 12-filler opening, 13-oil spilling mouth, 14-fluid passage, 71-dial.
Embodiment
For making that the utility model is had to further understanding, below with reference to Figure of description and specific embodiment, the utility model is described in further detail:
Shown in Fig. 1, a kind of direct-acting overflow valve, comprise valve body 1, be positioned at mangetic core assembly and the pressure-regulating device of valve body 1, the front end of valve body 1 is provided with filler opening 12 and oil spilling mouth 13, the valve seat 10 that mangetic core assembly comprises spool 4 and offsets with spool 4, spool 4 is located at the connectivity part between filler opening 12 and oil spilling mouth 13, the circulation of change control liquid oil by its station from filler opening 12 to oil spilling mouth 13, pressure-regulating device comprises the pressure adjusting spring 9 and the screw press 6 that are located in valve body 1, wherein, mangetic core assembly also comprises the valve rod 5 being connected with spool 4, valve rod 5 is located in the cavity of front cover 3 of valve body 1, the other end of valve rod 5 is connected with secondary spring 11, secondary spring 11 is nature in the time that spool 4 is closed, both without compressing also without stretching, there is no compression prestress and stretching prestressing force.
When enforcement, screw press 6 runs through the rear end cover 2 of valve body 1 and is threaded with it, and one end that screw press 6 stretches into valve body 1 is socketed with spring seat 8, spring seat 8 be fixed on rear end cover 2 and with screw press 6 can relative sliding.One end that screw press 6 stretches out valve body 1 is provided with handwheel 7, handwheel 7 is provided with the dial 71 that shows set pressure value, clockwise rotate handwheel 7 and can drive screw press 6 to move right in valve body 1, rotate counterclockwise handwheel 7 and can drive screw press 6 to be moved to the left in valve body 1.The front end of valve rod 5 is tapered, between its outer peripheral surface and the cavity inner wall of front cover 3, forms fluid passage 14, filler opening 12 and fluid passage 14 conductings.The rear end of valve rod 5 is provided with groove, and secondary spring 11 is placed in the groove of valve rod 5 rear ends.Pressure adjusting spring 9 one end and valve seat 10 are fixing, and the other end is connected with spring seat 8.
The working principle of this direct-acting overflow valve is: under original state, pressure adjusting spring 9 keeps certain pre compressed magnitude, its prestressing force make valve seat 10 tightly prop up spool 4 to the right, spool 4 is closed, filler opening 12 and oil spilling mouth 13 on valve body 1 are cut off mutually, and relief valve does not play pressure regulation effect.Along with the hydraulic coupling at filler opening 10 places constantly raises, in the time that spool 4 right side hydraulic couplings are greater than stretching prestressing force sum to the right of compression prestress to the right of pressure adjusting spring 9 and secondary spring 11, spool 4 is moved to the left, spool 4 is opened, conducting between filler opening 10 and oil spilling mouth 13, unnecessary fluid enters oil spilling mouth 13 and the oil sump tank that overflows from fluid passage 14, make the pressure stability at filler opening 10 places on setting.In the hydraulic control system that need to be applied to different pressures rank time, handwheel 7 on rotatable screw press 6, in the time of the larger pressore setting of needs, clockwise rotate handwheel 7, screw press 6 is moved right, increase the pre compressed magnitude of pressure adjusting spring 9, strengthen the prestressing force that spool 4 need to overcome, strengthened the pressore setting of relief valve.In the time of the less pressore setting of needs, rotate counterclockwise handwheel 7, screw press 6 is moved to the left, reduce the pre compressed magnitude of pressure adjusting spring 9, the prestressing force that spool 4 need to overcome is weakened, reduce the pressore setting of relief valve.When the hydraulic coupling at filler opening 10 places reduces, while being not enough to overcome stretching prestressing force sum to the right of compression prestress to the right of pressure adjusting spring 9 and secondary spring 11, spool 4 moves right and closes, and filler opening 10 and oil spilling mouth 13 cut off.
This direct-acting overflow valve has been set up secondary spring 11 to spool 4, in the time that hydraulic driving spool 4 is opened, the stretching prestressing force of the compression prestress of pressure adjusting spring 9 and secondary spring 11 in the same way, both prestressing force forms the pressure maximum predefined value of relief valve together, the secondary spring of setting up has been strengthened the pressure maximum predefined value of relief valve, has expanded the range of regulation of relief valve and has used range.In addition, secondary spring 11 is located in the internal cavities of front cover 3, in realizing this effect of expansion relief valve pressure regulating scope, does not increase the internal structure complexity of relief valve, the later period maintenance of relief valve is convenient in its simple internal structure design, easy to assembly.
More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what in above-described embodiment and specification, describe is principle of the present utility model; under the prerequisite that does not depart from the utility model spirit and scope, the utility model also has various changes and modifications; these changes and improvements all fall in claimed scope of the present utility model, and the protection domain that the utility model requires is defined by appending claims and equivalent thereof.
Claims (7)
1. a direct-acting overflow valve, comprise valve body, be positioned at mangetic core assembly and the pressure-regulating device of described valve body, the front end of described valve body is provided with filler opening and oil spilling mouth, the valve seat that described mangetic core assembly comprises spool and offsets with described spool, described pressure-regulating device comprises the pressure adjusting spring and the screw press that are located in described valve body, it is characterized in that, described mangetic core assembly also comprises the valve rod being connected with described spool, described valve rod is located in the front cover cavity of described valve body, and the described valve rod the other end is connected with secondary spring.
2. a kind of direct-acting overflow valve according to claim 1, is characterized in that, the front end of described valve rod is tapered, and the rear end of described valve rod is provided with groove.
3. a kind of direct-acting overflow valve according to claim 1, is characterized in that, described secondary spring is placed in the groove of described valve rod rear end.
4. a kind of direct-acting overflow valve according to claim 1 and 2, is characterized in that, between the fore end outer circumference face of described valve rod and the cavity inner wall of described front cover, forms fluid passage, described filler opening and the conducting of described fluid passage.
5. a kind of direct-acting overflow valve according to claim 1, it is characterized in that, described screw press runs through the rear end cover of described valve body and is threaded with it, and one end that described screw press stretches into described valve body is socketed with spring seat, and the other end of described screw press is provided with handwheel.
6. a kind of direct-acting overflow valve according to claim 1, is characterized in that, described pressure adjusting spring one end and described valve seat are fixed, and the other end is connected with described spring seat.
7. a kind of direct-acting overflow valve according to claim 1, is characterized in that, described spool is located at the connectivity part between described filler opening and described oil spilling mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320666291.9U CN203614488U (en) | 2013-10-25 | 2013-10-25 | Direct-acting overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320666291.9U CN203614488U (en) | 2013-10-25 | 2013-10-25 | Direct-acting overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203614488U true CN203614488U (en) | 2014-05-28 |
Family
ID=50767137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320666291.9U Expired - Fee Related CN203614488U (en) | 2013-10-25 | 2013-10-25 | Direct-acting overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203614488U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438549A (en) * | 2016-12-08 | 2017-02-22 | 燕山大学 | Direct-acting overflow valve |
-
2013
- 2013-10-25 CN CN201320666291.9U patent/CN203614488U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438549A (en) * | 2016-12-08 | 2017-02-22 | 燕山大学 | Direct-acting overflow valve |
| CN106438549B (en) * | 2016-12-08 | 2018-02-09 | 燕山大学 | A kind of direct-acting overflow valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 Termination date: 20151025 |
|
| EXPY | Termination of patent right or utility model |