CN205896305U - A adjust pressure check valve for relief pressure valve - Google Patents
A adjust pressure check valve for relief pressure valve Download PDFInfo
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- CN205896305U CN205896305U CN201620680297.5U CN201620680297U CN205896305U CN 205896305 U CN205896305 U CN 205896305U CN 201620680297 U CN201620680297 U CN 201620680297U CN 205896305 U CN205896305 U CN 205896305U
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Abstract
The utility model provides an adjust pressure check valve for relief pressure valve, including one -way disk seat and the one -way valve core who lies in the air inlet, one -way disk seat and first decompression chamber intercommunication are equipped with the second flexible sheet on the wall in first decompression chamber, and it is articulated with the one end of push rod that activity post and second flexible sheet fixed connection, activity post pass through second round pin axle, and the other end of push rod is articulated with the casing that constitutes first decompression chamber through first round pin axle, is equipped with adjusting screw in push rod and the corresponding position of one -way valve core. Set up adjusting screw through adopting at the push rod to optimize the scheme of push rod shape and structure, change adjusting screw's length, the first decompression chamber of regulation that just can be convenient inject high pressure, and can reduce the requirement to part accuracy.
Description
Technical field
The utility model is related to the pressure-reducing valve field of gas system, and particularly a kind of regulation pressure for pressure-reducing valve is unidirectional
Valve.
Background technology
Cng (compressed natural gas) so expects as a kind of gas, mixes evenly with air, and burning is more abundant, discharge
The harmful substance such as co, hc less；There is no carbon deposit after combustion of natural gas, engine scuffing can be reduced, maintaining expense is low；
Natural gas engine repacking is simple, particularly uses the dual fuel engine of gasoline engine refitting, because cost performance is high, using extensive；
Therefore new-energy automobile is used compressed natural gas cng to be suitable for current environmental requirement as fuel at present.
With the fast development of gas-fueled vehicles, on market, natural gas automobile pollution increases year by year.And adopt cng(to press
Contracting natural gas) system also accordingly increase.In cng gas control system, pressure-reducing valve belongs to core component, and steel cylinder compresses
The natural gas cng gas of 20mpa, before entering Motor Engine Cylinder burning, needs to implement gasification in pressure-reducing valve and subtracts
Pressure.
Chinese patent literature cn 102927352 a, describes a kind of buffer air chamber of natural gas used for automobile cng pressure-reducing valve
Structure.For example in existing pressure-reducing valve, the valve core structure of air valve as shown in Figure 2, is provided with check valve in the position of air inlet, and sets
There is the controlling organization for limiting unidirectional valve inlet pressure, there is problems that, due to the impact of the accuracy of manufacture, this controlling organization
Stress control error easily occurs, adjust and limit that pressure is extremely difficult to suitable value, difficulty of processing is big.
Content of the invention
Technical problem to be solved in the utility model is to provide a kind of regulation pressure check valve for pressure-reducing valve, can
The convenient requirement adjusting the pressure limiting, reducing to part processing precision, reduces difficulty of processing and production cost.Preferably square
In case, charge flow rate during work can be increased, and guarantee sealed reliable.
For solving above-mentioned technical problem, the utility model be the technical scheme is that a kind of regulation for pressure-reducing valve
Pressure check valve, including positioned at the one-way valve seat of air inlet and nonreturn valve core, one-way valve seat is connected with the first pressure-reducing chamber, first
The wall in pressure-reducing chamber is provided with the second flexible sheet, and movable post is fixedly connected with the second flexible sheet, and movable post passes through the second bearing pin
Hinged with one end of push rod, the other end of push rod passes through the first bearing pin and constitutes the housing hinge in the first pressure-reducing chamber, push rod with
The corresponding position of nonreturn valve core is provided with adjusting screw.
Preferably in scheme, described adjusting screw is threaded connection with push rod, adjusting screw is additionally provided with for
The nut of lock adjustment screw.
Preferably in scheme, in described push rod, the first bearing pin is located at different height from the second bearing pin, adjusting screw
Near the height and position of the second bearing pin, the height and position of adjusting screw is away from the height and position of the first bearing pin for height and position.
Preferably in scheme, the check valve of one-way valve seat and nonreturn valve core composition is the structure of one-way air inlet, in check valve
The interior one-way valve spring being provided with for making nonreturn valve core seal on core；
In one-way valve seat downstream, wall is provided with air admission hole.
Preferably in scheme, in the outside in the first pressure-reducing chamber, it is additionally provided with the spring for compressing the second flexible sheet.
Preferably in scheme, the first pressure-reducing chamber is connected with the second pressure-reducing chamber by air valve open in usual, the second pressure-reducing chamber and row
Gas port connects；
The concrete structure of air valve open in usual is: is provided with dividing plate, valve seat and dividing plate between the first pressure-reducing chamber and the second pressure-reducing chamber
It is fixedly connected, the bottom surface of valve seat is provided with valve element chamber, and the bottom of valve element chamber opens, and the top of valve element chamber is provided with leading of undergauge
Xiang Kong, the outer rim in the top guide hole of valve element chamber is provided with top annular horizontal seal face；
Valve element is made up of valve core rod and bulb, and valve core rod passes through the pilot hole of valve seat, and the top of bulb is provided with top
Horizontal seal face, top horizontal sealing surface is provided with sealing ring, and top horizontal sealing surface is formed with top annular horizontal seal face
Sealing cooperation；
Valve core rod is fixedly connected with the first flexible sheet, forms the second decompression between dividing plate, housing and the first flexible sheet
Room；
Stage clip is pressed on valve core rod, is additionally provided with the governor motion for adjusting stage clip pressure.
In further preferred scheme, in described governor motion, support is fixedly connected with the casing, adjusting screw rod upper end with
Connected in the way of not rotatably being axially movable between support, adjusting screw rod is threadeded with adjusting nut, adjusting nut quilt
Support is constrained to and is axially movable rotatably, and adjusting nut is pressed on stage clip.
In further preferred scheme, constitute negative pressure chamber between the first flexible sheet and case top, negative pressure chamber is provided with takes out
Negative pressure mouth.
In further preferred scheme, the bottom of bulb is provided with positioning tip, and dividing plate is provided with corresponding hole.
In further preferred scheme, dividing plate is provided with multiple and valve element chamber passage.
A kind of regulation pressure check valve for pressure-reducing valve that the utility model provides, by arranging regulation using in push rod
Screw, and optimize the scheme of putter shape and structure, change the length of adjusting screw it becomes possible to easily adjust the first pressure-reducing chamber
Restriction maximum pressure, and the requirement for element precision can be reduced.In preferred scheme, in the first pressure-reducing chamber and second
Pressure-reducing chamber using the structure of unique air valve open in usual, that is, adopts the structure in horizontal seal face, can increase flow area, and logical
Flow area is related to gas pressure, in the presence of gas pressure, the top annular horizontal seal face of valve seat and the top of valve element
Between horizontal seal face, can adaptively leveling, so that it is guaranteed that sealed reliable.Skew during valve core movement also will not shadow
Ring sealing effectiveness.Due to being the structure of horizontal plane, it is easy to processing and the measurement of plant equipment, thus the precision of part is higher,
Production cost is lower.The utility model is used not only in the pressure-reducing valve of cng it is also possible to be used for the pressure-reducing valve of other field
In, the pressure-reducing valve of such as liquefied petroleum gas or liquefied natural gas.
Brief description
The utility model is described in further detail with reference to the accompanying drawings and examples:
Fig. 1 is overall structure diagram of the present utility model.
Fig. 2 is the structural representation of breather cheek valve in the utility model.
Fig. 3 is the explosive view of air valve open in usual in the utility model.
Fig. 4 is the explosive view of air valve open in usual in prior art.
In figure: valve element 1, top horizontal sealing surface 101, sealing ring 102, guide part 103, valve core rod 104, bulb 105,
Conical seal (contact) face 106, positioning most advanced and sophisticated 107, regulating tank 108, valve seat 2, pilot hole 21, top annular horizontal seal face 22, deep gouge
23, valve element chamber 24, connecting hole 25, back taper sealing surface 26, valve seat 2 ' of the prior art, housing 3, the first pressure-reducing chamber 4, the
Two pressure-reducing chambers 5, negative pressure chamber 6, passage 7, breather cheek valve 8, one-way valve seat 81, nonreturn valve core 82, one-way valve spring 83, air inlet
Hole 84, the first bearing pin 85, push rod 86, adjusting screw 87, the second bearing pin 88, movable post 89, air inlet 9, exhaust outlet 10, dividing plate
11, the first flexible sheet 12, compressing tablet 13, negative pressure outlet port 14, adjusting nut 15, stage clip 16, adjusting screw rod 17, support 18, second
Flexible sheet 19.
Specific embodiment
Orientation in this example is that the orientation in Figure of description 1 is defined, and example bottom as mentioned refers to the bottom in Fig. 1
Portion direction.
As shown in Fig. 1,2, a kind of regulation pressure check valve for pressure-reducing valve, including the check valve positioned at air inlet 9
Seat 81 and nonreturn valve core 82, one-way valve seat 81 is connected with the first pressure-reducing chamber 4, is provided with the second elasticity on the wall in the first pressure-reducing chamber 4
Diaphragm 19, as shown in fig. 1, the diapire in the first pressure-reducing chamber 4 is provided with the second flexible sheet 19, and the second flexible sheet 19 passes through method
The blue mode connecting is sealedly and fixedly connected with housing 3.Movable post 89 passes through pad and nut and the second flexible sheet 19 is fixing even
Connect, in preferred scheme such as Fig. 1, in the outside in the first pressure-reducing chamber 4, be additionally provided with the spring for compressing the second flexible sheet 19.
Movable post 89 is hinged with one end of push rod 86 by the second bearing pin 88, and the other end of push rod 86 passes through the first bearing pin 85
With the housing hinge constituting the first pressure-reducing chamber 4, it is provided with adjusting screw 87 in push rod 86 position corresponding with nonreturn valve core 82.
Preferably in scheme, described adjusting screw 87 is threaded connection with push rod 86, also sets in adjusting screw 87
There is the nut for lock adjustment screw 87.By this structure, when the air pressure entering from air inlet 9 exceedes setting value, then first subtracts
The pressure of pressure chamber 4 increases, and so that the second flexible sheet 19 is deformed, drive activity post 89 is descending, and push rod 86 is with the first bearing pin 85 for circle
The heart rotates, and nonreturn valve core 82 is withstood in the free end of adjusting screw 87, thus controlling between nonreturn valve core 82 and one-way valve seat 81
Openings of sizes.
Preferably in scheme such as Fig. 2, in described push rod 86, the first bearing pin 85 is located at different height from the second bearing pin 88
Degree, near the height and position of the second bearing pin 88, the height and position of adjusting screw 87 is away from first for the height and position of adjusting screw 87
The height and position of bearing pin 85.By this structure, adjusting screw 87 is made to have larger stroke.
Preferably in scheme, the check valve of one-way valve seat 81 and nonreturn valve core 82 composition is the structure of one-way air inlet, in list
The interior one-way valve spring 83 being provided with for making nonreturn valve core 82 seal on valve element 82；
It is provided with air admission hole 84 in one-way valve seat 81 downstream wall.By this structure, make structure of the present utility model more compact,
It is easy to install in narrow space.Upstream and downstream in this example are to be defined by the flow direction of gas.
Preferably in scheme such as Fig. 1, the first pressure-reducing chamber 4 is connected with the second pressure-reducing chamber 5 by air valve open in usual, the second decompression
Room 5 is connected with exhaust outlet 10；
The concrete structure of air valve open in usual is: be provided with dividing plate 11 between the first pressure-reducing chamber 4 and the second pressure-reducing chamber 5, valve seat 2 with
Dividing plate 11 is fixedly connected, and the bottom surface of valve seat 2 is provided with valve element chamber 24, and the bottom of valve element chamber 24 opens, further preferred side
In case, dividing plate 11 is provided with multiple passages 7 connecting with valve element chamber 24.
The top of valve element chamber 24 is provided with the pilot hole 21 of undergauge, and the outer rim in the top guide hole 21 of valve element chamber 24 sets
There is top annular horizontal seal face 22；
Valve element 1 is made up of valve core rod 104 and bulb 105, and valve core rod 104 passes through the pilot hole 21 of valve seat 2, bulb
105 top is provided with top horizontal sealing surface 101, and top horizontal sealing surface 101 is provided with sealing ring 102, and top horizontal seals
Face 101 and top annular horizontal seal face 22 form sealing cooperation；
Valve core rod 104 is fixedly connected with the first flexible sheet 12, shape between dividing plate 11, housing 3 and the first flexible sheet 12
Become the second pressure-reducing chamber 5；
Stage clip 16 is pressed on valve core rod 104, is additionally provided with the governor motion for adjusting stage clip 16 pressure.By this structure,
Form horizontal seal face, increase flow area, and flow area is directly proportional to pressure size.Due to the motion process in valve element
In, easily skew occurs, using horizontal seal face, the skew of valve element does not interfere with sealing effectiveness.And this structure be easy to processing and
Measurement.When the gas pressure entering into the second pressure-reducing chamber 5 from the first pressure-reducing chamber 4 is larger, then the first flexible sheet 12 deforms, thus
Band movable valve plug 1 is up, and gas passage is sealed, then as the reduced pressure in the second pressure-reducing chamber 5, in the presence of stage clip 16,
Valve element 1 is descending, and gas passage is opened, thus realizing the purpose of stable decompression.
In further preferred scheme, in described governor motion, support 18 is fixedly connected with housing 3, adjusting screw rod 17
It is connected in the way of not rotatably being axially movable between upper end and support 18, adjusting screw rod 17 is with adjusting nut 15 screw thread even
Connect, adjusting nut 15 is constrained to by support 18 and is axially movable rotatably, and adjusting nut 15 is pressed on stage clip 16.Adjusting
The top of screw rod 17 is provided with inner hexagonal hole, by rotating adjusting screw rod 17, for example, makes adjusting nut 15 along adjusting screw rod 17
Moving axially downwards, thus adjusting the size of pressure, and enabling gas to need bigger pressure so that valve seat 2 is sealed.
In further preferred scheme, between the first flexible sheet 12 and housing 3 top, constitute negative pressure chamber 6, negative pressure chamber 6 sets
There is negative pressure outlet port 14.Negative pressure chamber is connected with engine, by this structure, can better conform to the pressure change in the second pressure-reducing chamber 5, from
And avoid the air pressure in negative pressure chamber 6 to form damping to the motion of the first flexible sheet 12.
In further preferred scheme, the bottom of bulb 105 is provided with positioning tip, and dividing plate 11 is provided with corresponding hole.
By this structure, it is easy to limit the radial position of valve element 1.
The above embodiments are only optimal technical scheme of the present utility model, and are not construed as limit of the present utility model
System, the technical scheme that protection domain of the present utility model should be recorded with claim, the technical scheme recorded including claim
The equivalents of middle technical characteristic are protection domain.I.e. equivalent within this range is improved, also in the utility model
Protection domain within.
Claims (10)
1. a kind of regulation pressure check valve for pressure-reducing valve, including the one-way valve seat (81) positioned at air inlet (9) and check valve
Core (82), one-way valve seat (81) is connected with the first pressure-reducing chamber (4), it is characterized in that: is provided with second on the wall of the first pressure-reducing chamber (4)
Flexible sheet (19), movable post (89) is fixedly connected with the second flexible sheet (19), and movable post (89) passes through the second bearing pin (88)
Hinged with one end of push rod (86), the other end of push rod (86) passes through the first bearing pin (85) and constitutes the shell in the first pressure-reducing chamber (4)
Body is hinged, is provided with adjusting screw (87) in push rod (86) position corresponding with nonreturn valve core (82).
2. a kind of regulation pressure check valve for pressure-reducing valve according to claim 1, is characterized in that: described regulation spiral shell
Nail (87) is threaded connection with push rod (86), is additionally provided with the spiral shell for lock adjustment screw (87) in adjusting screw (87)
Female.
3. a kind of regulation pressure check valve for pressure-reducing valve according to claim 1, is characterized in that: described push rod
(86) in, the first bearing pin (85) and the second bearing pin (88) are located at different height, and the height and position of adjusting screw (87) is near the
The height and position of two bearing pins (88), the height and position of adjusting screw (87) is away from the height and position of the first bearing pin (85).
4. a kind of regulation pressure check valve for pressure-reducing valve according to claim 1, is characterized in that: one-way valve seat (81)
The check valve forming with nonreturn valve core (82) is the structure of one-way air inlet, is provided with for making check valve in nonreturn valve core (82) is upper
The one-way valve spring (83) that core (82) seals；
In one-way valve seat (81) downstream, wall is provided with air admission hole (84).
5. a kind of regulation pressure check valve for pressure-reducing valve according to claim 1, is characterized in that: in the first pressure-reducing chamber
(4) outside, is additionally provided with the spring for compressing the second flexible sheet (19).
6. a kind of regulation pressure check valve for pressure-reducing valve according to claim 1, is characterized in that: the first pressure-reducing chamber
(4) connected with the second pressure-reducing chamber (5) by air valve open in usual, the second pressure-reducing chamber (5) are connected with exhaust outlet (10)；
The concrete structure of air valve open in usual is: is provided with dividing plate (11), valve seat between the first pressure-reducing chamber (4) and the second pressure-reducing chamber (5)
(2) it is fixedly connected with dividing plate (11), the bottom surface of valve seat (2) is provided with valve element chamber (24), and the bottom of valve element chamber (24) opens, valve
The top of core cavity room (24) is provided with the pilot hole (21) of undergauge, and the outer rim in the top guide hole (21) of valve element chamber (24) is provided with
Top annular horizontal seal face (22)；
Valve element (1) is made up of valve core rod (104) and bulb (105), and valve core rod (104) passes through the pilot hole (21) of valve seat (2),
The top of bulb (105) is provided with top horizontal sealing surface (101), and top horizontal sealing surface (101) is provided with sealing ring
(102), top horizontal sealing surface (101) and top annular horizontal seal face (22) form sealing cooperation；
Valve core rod (104) is fixedly connected with the first flexible sheet (12), dividing plate (11), housing (3) and the first flexible sheet (12)
Between form the second pressure-reducing chamber (5)；
Stage clip (16) is pressed on valve core rod (104), is additionally provided with the governor motion for adjusting stage clip (16) pressure.
7. a kind of regulation pressure check valve for pressure-reducing valve according to claim 6, is characterized in that: described regulation machine
In structure, support (18) is fixedly connected with housing (3), with rotatably can not be axial between adjusting screw rod (17) upper end and support (18)
The mode of movement connects, and adjusting screw rod (17) is threadeded with adjusting nut (15), and adjusting nut (15) is constrained by support (18)
Not rotatable for being axially movable, adjusting nut (15) is pressed on stage clip (16).
8. a kind of regulation pressure check valve for pressure-reducing valve according to claim 6, is characterized in that: the first flexible sheet
(12) constitute negative pressure chamber (6) and housing (3) top between, negative pressure chamber (6) is provided with negative pressure outlet port (14).
9. a kind of regulation pressure check valve for pressure-reducing valve according to claim 6, is characterized in that: bulb (105)
Bottom be provided with that positioning is most advanced and sophisticated, dividing plate (11) is provided with corresponding hole.
10. a kind of regulation pressure check valve for pressure-reducing valve according to claim 6, is characterized in that: on dividing plate (11)
It is provided with multiple passages (7) connecting with valve element chamber (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620680297.5U CN205896305U (en) | 2016-07-01 | 2016-07-01 | A adjust pressure check valve for relief pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620680297.5U CN205896305U (en) | 2016-07-01 | 2016-07-01 | A adjust pressure check valve for relief pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205896305U true CN205896305U (en) | 2017-01-18 |
Family
ID=57770539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620680297.5U Active CN205896305U (en) | 2016-07-01 | 2016-07-01 | A adjust pressure check valve for relief pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205896305U (en) |
-
2016
- 2016-07-01 CN CN201620680297.5U patent/CN205896305U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220713 Address after: 430043 No. 8 Qingshui Road, Jinyinhu street, Dongxihu District, Wuhan City, Hubei Province Patentee after: WUHAN LINGDIAN AUTOMOBILE ELECTRIC CONTROL SYSTEM CO.,LTD. Address before: 430000 F3, building 2, weidesheng Industrial Park, No. 15, Fenghuang Road, Fenghuangshan Development Zone, Caidian District, Wuhan City, Hubei Province Patentee before: WUHAN HONG SI DE AUTOMOTIVE Co.,Ltd. |
|
| TR01 | Transfer of patent right |