CN102352934A - Piston type pressure limiting valve - Google Patents
Piston type pressure limiting valve Download PDFInfo
- Publication number
- CN102352934A CN102352934A CN2011102992169A CN201110299216A CN102352934A CN 102352934 A CN102352934 A CN 102352934A CN 2011102992169 A CN2011102992169 A CN 2011102992169A CN 201110299216 A CN201110299216 A CN 201110299216A CN 102352934 A CN102352934 A CN 102352934A
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- valve
- piston
- lower body
- hole
- spring
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Abstract
The invention relates to a piston type pressure limiting valve. An adjusting top seat is arranged at the inner upper end of an upper cover hole of the limiting valve; a balancing spring is arranged at the lower end of the upper cover hole; a balancing piston is arranged in a lower body hole; an O-shaped sealing ring is arranged in a groove outside the balancing piston; a valve assembly is positioned in a screw hole at the lower end of a lower body; the back face of the valve is provided with a valve spring; one end of the valve spring is supported in a valve plug hole; an O-shaped sealing ring is sleeved outside a valve plug; the lower end of the valve plug is supported on the balance piston; and four limiting ribs are arranged in the upper cover hole, and are used for controlling the travel of the balancing piston and limiting the maximum displacement of the balancing piston. The balancing piston is arranged in the lower body hole, the O-shaped sealing ring is arranged in the groove outside the balancing piston, the balancing piston is positioned at a lowermost position for jacking the valve assembly when not in use, the valve assembly is positioned in the screw hole at the lower end of the lower body, and four guide ribs are arranged in the screw hole, so that the valve can keep concentric with a sealing line in the moving process; the back face of the valve is provided with a valve spring for supporting, one end of the valve spring is supported in a valve plug hole, and the O-shaped sealing ring is sleeved outside the valve plug for sealing; and a spiral filter screen is arranged at the air inlet A of the lower body, so that impurities can be effectively prevented from entering, a valve sealing surface is kept clean, and perfect sealing is ensured.
Description
Technical field
The invention belongs to pneumatic component technical field, particularly a kind of piston-type pressure limiting valve of new structure.
Background technique
The various machineries that are used as power with air, automobile etc. are the pilot pressure size, adopt the pressure limit valve basically.Common pressure-limit valve all adopts diaphragm type structure, and pressure is delivered to earlier on the diaphragm, again by diaphragm control core bar, and again through the core bar control valve, through multistage transmission, the size of coming control zone air pressure.Because diaphragm bears the pressure maximum, and because diaphragm is fixed on the valve body, and when core bar was up and down, frequent stretching film damaged greatly diaphragm, diaphragm is very easily damaged, has seriously shortened the working life of pressure-limit valve.And because valve inner adopts multistage transmission, complex structure, part is various, influences manufacturing efficiency, and mass stability is not high.The pressure limit valve of a kind of steady quality of market in urgent need, long service life.
Summary of the invention
The technical problem that the present invention will solve is; Because prior art air dynamic power machine etc.; The basic pressure limit valve that adopts comes the pilot pressure size; Common pressure-limit valve all adopts diaphragm type structure; Pressure is delivered to earlier on the diaphragm, again by diaphragm control core bar, again through the core bar control valve; Through multistage transmission, the size of coming control zone air pressure.Because diaphragm bears the pressure maximum, and because diaphragm is fixed on the valve body, and when core bar was up and down, frequent stretching film damaged greatly diaphragm, and diaphragm is very easily damaged, and valve inner is again to adopt multistage transmission, complex structure, stability is not high.In order overcoming the above problems, and then a kind of piston-type pressure limiting valve of brand new to be provided, to have possessed steady quality, the characteristics of long service life are to adapt to the demand in market.
The technological scheme that the present invention adopts is that a kind of piston-type pressure limiting valve, said limiting valve are provided with a lower body, are provided with a loam cake above the said lower body, are provided with valve assembly in the said lower body, also are provided with equalizing piston and balance spring in the said lower body.
Be provided with the adjustment bolt in the said loam cake and regulate seat and balance spring, be designed with four spacing muscle in the loam cake hole.
Be provided with equalizing piston in the said lower body macropore, below be designed with valve assembly in the screw.
In the intake interface of said lower body, be provided with the spiral filtration net.
The invention provides a kind of piston-type pressure limiting valve; The adjusting footstock is equipped with in the upper end in the loam cake hole; Balance spring is equipped with in the lower end; In the following body opening equalizing piston is housed; The equalizing piston water jacket is equipped with O-ring seals, and valve assembly is positioned at lower body lower end screw, and valve spring is equipped with at the valve back side; Valve spring one end bearing in valve plug hole, valve plug overcoat O-ring seals.The lower end is bearing on the equalizing piston, and four spacing muscle of design in the loam cake hole are used to control the stroke of equalizing piston, the maximum displacement of limiting balance piston.In the following body opening equalizing piston is housed; The equalizing piston water jacket is equipped with O-ring seals; Equalizing piston is in lowest positions under user mode not, back down valve assembly; Valve assembly is positioned at lower body lower end screw; Four guiding ribs are arranged in the screw, guarantee can keep concentric with potted line when valve is movable, there is the valve spring supporting at the valve back side; Valve spring one end bearing is in valve plug hole, and valve plug overcoat O-ring seals seals.Lower body suction port A is equipped with the spiral filtration net, can prevent effectively that impurity from getting into, and guarantees that valve sealing face is clean, seals intact.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: 1 adjustment bolt, 2 locking nuts, 3 loam cakes, 4 adjusting screw seats; 5 balance springs, 6 suction ports, 7 O-ring seals, 8 equalizing pistons; 9 lower bodies, 10 air outlets, 11 valve plugs, 12 valve springs; 13 valve assemblies, 14 spiral filtration nets, 15 spacing muscle; 16 guiding ribs, 17 cavitys, 18 gaps; 19 control chambers, 20 mesopores, 21 through holes.
Embodiment
The present invention provides a kind of pressure limit valve; In the structural representation as shown in Figure 1; Loam cake 3 tops are provided with adjustment bolt 1; Bolt is provided with the outer-hexagonal nut 2 that is used for fixing bolt; The upper end is provided with adjusting screw seat 4 in the loam cake hole; Cooperate adjustment bolt adjustment spring length, balance spring 5 upper ends are bearing on the adjusting screw seat 4.Balance spring 5 is equipped with in the lower end, and lower body is equipped with equalizing piston 8 in 9 holes, and equalizing piston 8 water jackets are equipped with O-ring seals 7; Valve assembly 13 is positioned at lower body lower end screw; Valve spring 12 is equipped with at the valve back side, valve spring one end bearing in valve plug 11 holes, valve plug overcoat O-ring seals.The lower end is bearing on the equalizing piston 8, and four spacing muscle 15 of design in the loam cake hole are used to control the stroke of equalizing piston, the maximum displacement of limiting balance piston.Lower body is equipped with equalizing piston 8 in 9 holes; Equalizing piston 8 water jackets are equipped with O-ring seals 7; Equalizing piston is in lowest positions under user mode not, back down valve assembly 13; Valve assembly is positioned at lower body lower end screw; Four guiding ribs 16 are arranged in the screw, guarantee can keep concentric with potted line when valve is movable, there are valve spring 12 supportings at the valve back side; Valve spring one end bearing is in valve plug 11 holes, and valve plug overcoat O-ring seals seals.Lower body suction port 6 is equipped with spiral filtration net 14, can prevent effectively that impurity from getting into, and guarantees that valve sealing face is clean, seals intact.During pressure-limit valve work; Pressurized air gets into cavity 17 through suction port 6; Again through gap between valve assembly and the lower body potted line 18 and through hole 21 entering air outlets 10; Also get into equalizing piston control chamber 19 simultaneously through mesopore 20; Equalizing piston is stressed to be moved on balance spring; Valve assembly is also moving on simultaneously under the valve spring effect; After reaching setting pressure; Valve assembly just contacts with the lower body potted line, and opening the valve amount is zero, and pressurized air no longer gets into the air outlet; When air outlet air pressure descends; Balance spring promotes to move down on the piston, and valve reopens, until satisfying air outlet air pressure.Valve closing is accomplished a work cycle.
Claims (4)
1. piston-type pressure limiting valve, said limiting valve is provided with a lower body, is provided with a loam cake above the said lower body, is provided with valve assembly in the said lower body, also is provided with equalizing piston and balance spring in the said lower body.
2. a kind of piston-type pressure limiting valve according to claim 1 is characterized in that: be provided with the adjustment bolt in the said loam cake and regulate seat and balance spring, be designed with four spacing muscle in the loam cake hole.
3. a kind of piston-type pressure limiting valve according to claim 1 is characterized in that: be provided with equalizing piston in the said lower body macropore, below be designed with valve assembly in the screw.
4. a kind of piston-type pressure limiting valve according to claim 1 is characterized in that: in the intake interface of said lower body, be provided with the spiral filtration net.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102992169A CN102352934A (en) | 2011-09-29 | 2011-09-29 | Piston type pressure limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102992169A CN102352934A (en) | 2011-09-29 | 2011-09-29 | Piston type pressure limiting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102352934A true CN102352934A (en) | 2012-02-15 |
Family
ID=45576560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102992169A Pending CN102352934A (en) | 2011-09-29 | 2011-09-29 | Piston type pressure limiting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102352934A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102813459A (en) * | 2012-08-14 | 2012-12-12 | 苏州华爱电子有限公司 | Leakproof ring of water dispenser and water dispenser |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109153A (en) * | 1993-10-01 | 1995-09-27 | 速睦喜股份有限公司 | Pressure reducing valve |
| CN2809377Y (en) * | 2005-06-27 | 2006-08-23 | 上海正丰阀门制造有限公司 | Multifunctional pressure relief valve for indoor use |
-
2011
- 2011-09-29 CN CN2011102992169A patent/CN102352934A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109153A (en) * | 1993-10-01 | 1995-09-27 | 速睦喜股份有限公司 | Pressure reducing valve |
| CN2809377Y (en) * | 2005-06-27 | 2006-08-23 | 上海正丰阀门制造有限公司 | Multifunctional pressure relief valve for indoor use |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102813459A (en) * | 2012-08-14 | 2012-12-12 | 苏州华爱电子有限公司 | Leakproof ring of water dispenser and water dispenser |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120215 |