CN202132202U - Two-stage compressor and upper flange assembly thereof - Google Patents
Two-stage compressor and upper flange assembly thereof Download PDFInfo
- Publication number
- CN202132202U CN202132202U CN201120153448U CN201120153448U CN202132202U CN 202132202 U CN202132202 U CN 202132202U CN 201120153448 U CN201120153448 U CN 201120153448U CN 201120153448 U CN201120153448 U CN 201120153448U CN 202132202 U CN202132202 U CN 202132202U
- Authority
- CN
- China
- Prior art keywords
- upper flange
- compressor
- valve body
- flange assembly
- exhaust port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims description 17
- 238000012545 processing Methods 0.000 abstract description 8
- 230000030279 gene silencing Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Safety Valves (AREA)
Abstract
The utility model discloses an upper flange subassembly for compressor, including upper flange and apron, be equipped with the exhaust hole on the upper flange, the end of giving vent to anger in exhaust hole is equipped with the discharge valve mounting hole with the coaxial setting in this exhaust hole, be equipped with discharge valve on the discharge valve mounting hole, follow on the upper flange the end face of giving vent to anger in exhaust hole is equipped with annular disk seat, discharge valve specifically includes: a lift limiter fixed to the cover plate; an elastic member connected to the lift limiter; and the valve body is connected with the elastic piece and coaxially arranged with the exhaust hole, and the valve body is abutted against the annular valve seat. The utility model provides a go up discharge valve on flange subassembly simple structure and compactness, ring disk seat processing is easy, and the clearance volume that the gas vent formed is little, and the valve body is compared with current valve block, and its exhaust resistance is little. The utility model also discloses a two-stage compressor of flange subassembly in having above-mentioned.
Description
Technical field
The utility model relates to the Compressor Technology field, particularly a kind of two stage compressor and upper flange assembly thereof.
Background technique
The double rotor two-stage increase the enthalpy compressor mainly by motor, lower cylinder compression structure, increase enthalpy structure, lower flange structure, upper cylinder compression structure, seal structure for casing, gas-liquid separator assembly and form.Liquor separator is fixed by welding on the housing; Lower cylinder by screw on lower flange; Liquor separator is connected with pump housing intakeport on the lower cylinder through sucking pipe, and in the lower end of lower flange, fix through screw and upper flange assembly by upper cylinder through screw for lower cover plate; Link to each other with pump housing dividing plate simultaneously, the upper flange assembly is welded on the housing.
In order to accomplish processes such as compression, exhaust; Need on flange (upper flange and lower flange), outlet valve be set, mostly the traditional exhaust valve is to adopt the cooperating structure of valve block and baffle plate, and valve block is installed on the valve seat of flange; Baffle plate is being pressed valve block, in order to the extrusion and the height that comes back of control valve block.The outlet valve of this structure is high to the requirement on machining accuracy of valve seat, and the clearance volume of relief opening can not design too for a short time, otherwise can influence the intensity of upper flange.
In addition, for the two stage compressor of low back pressure or middle back pressure, the pressurized gas after secondary has compressed are directly discharged outside the casing after noise reduction.In this course, prevent that pressurized gas are leaked to interior from silencing cavity, therefore require the sealability of silencing cavity to get well.Ring sealing and outer shroud sealing in the sealing branch of silencing cavity, existing interior ring sealing technique generally is to use O-ring seals in bearing top circle and cover plate, to form sealing between the circle.Because the pretightening force of O-ring seals can't freely be controlled, so that the sealability of this structure is bad, causes pressurized gas to leak easily.
Therefore, how simplifying the structure of outlet valve, reduce the processing request of delivery valve seat, is those skilled in the art's problem demanding prompt solutions.
The model utility content
In view of this, the utility model provides a kind of two stage compressor and upper flange assembly thereof, to simplify the structure of outlet valve, reduces the processing request of outlet valve valve seat.
For realizing above-mentioned purpose, the utility model provides following technological scheme:
A kind of compressor is used flange assembly; Comprise upper flange and cover plate; Said upper flange is provided with exhaust port, and the outlet side of said exhaust port is provided with the outlet valve mounting hole with the coaxial setting of this exhaust port, and said outlet valve mounting hole is provided with outlet valve; The outlet side end face of the said exhaust port in said upper flange upper edge is provided with ring-shaped valve seats, and said outlet valve specifically comprises:
Be fixed on the lift limiter on the said upper flange;
The elastic component that links to each other with said lift limiter;
Link to each other with said elastic component, and with the valve body of the coaxial setting of said exhaust port, this valve body and said ring-shaped valve seats offset.
Preferably, use in the flange assembly in above-mentioned compressor, said ring-shaped valve seats is planar annular, annular arc surface, the conical surface or the sphere that is processed on the outlet side of said exhaust port.
Preferably, use in the flange assembly in above-mentioned compressor, said valve body is centrum or spheroid, and the maximum outside diameter of this valve body is greater than the internal diameter of said exhaust port.
Preferably, use in the flange assembly in above-mentioned compressor, said elastic component is cylindrical or conical pressure spring.
Preferably; Use in the flange assembly in above-mentioned compressor; Said lift limiter is the stepped shaft cylindrical body, and the end that its diameter is bigger is interference fitted on the said outlet valve mounting hole, and said elastic component is sleeved on said lift limiter to have on the end of less external diameter.
Preferably; Use in the flange assembly in above-mentioned compressor; Said upper flange have the suit portion that is sleeved on the said compressor crank shaft and link to each other with the bottom of said suit portion and with the coaxial flange skirt section of said suit portion; The top end that the outer circumferential face of said suit portion is provided with said flange skirt section is positioned at the planar annular on the same plane, and said cover plate be located on the top end and said planar annular in said flange skirt section, and with said suit portion through the seal ring sealing.
Preferably, use in the flange assembly in above-mentioned compressor, said seal ring is the O RunddichtringO.
Preferably, use in the flange assembly, be provided with sealing gasket between said planar annular and the said cover plate in above-mentioned compressor.
A kind of two stage compressor comprises the upper flange assembly, and said upper flange assembly is as above each described upper flange assembly.
Can find out from above-mentioned technological scheme; The compressor that the utility model provides is used flange assembly; The outlet side of its exhaust port is provided with the outlet valve mounting hole with the coaxial setting of this exhaust port; The outlet valve mounting hole is provided with outlet valve, and the outlet side end face of upper flange upper edge exhaust port is provided with ring-shaped valve seats, and outlet valve specifically comprises: be fixed on the lift limiter on the said upper flange; The elastic component that links to each other with said lift limiter; Link to each other with said elastic component, and with the valve body of the coaxial setting of said exhaust port, this valve body and said ring-shaped valve seats offset.
Based on above-mentioned setting; The valve body of the utility model closely cooperates with the mode that ring-shaped valve seats contacts with line and carries out airtight to relief opening; The moving direction of valve body is retrained by the outlet valve mounting hole; The maximum outside diameter of valve body is slightly littler than the internal diameter of outlet valve mounting hole, prevents the valve body expanded by heating and stuck on the outlet valve mounting hole.Elastic component is given the valve body applied thrust, the opening and closing of control valve body.Lift limiter is fixed on the upper flange, plays the effect of restriction elastic component position, and the other end is unsettled, plays the effect of limiting valve body Lift.When exhaust, gas pressure is greater than valve body gravity and elastic component thrust sum, and valve body is backed down, contact with the external part of lift limiter behind the valve body rising certain altitude, and stop motion under the active force of lift limiter, accomplish up to exhaust.After exhaust was accomplished, under the acting in conjunction of elastic component thrust and valve body gravity, valve body walked downward, the final plant closure outlet valve.Exhaust structure on the upper flange assembly that the utility model provides is simple and compact, the ring-shaped valve seats easy processing, and the clearance volume that relief opening forms is little, and valve body is compared with existing valve block, and its exhaust resistance is little.
In a preferred version of the utility model; The top end that on the outer circumferential face of the suit portion of upper flange, is provided with the flange skirt section is positioned at the planar annular on the same plane; Because silencing cavity forms between suit portion and flange skirt section; Therefore in the time of on the top end that cover plate is located in the flange skirt section and planar annular, the surface of contact of cover plate and planar annular forms ring sealing in the one-level of silencing cavity, between suit portion and cover plate, is provided with then to encircle in the secondary that seal ring constitutes silencing cavity to seal.The utility model has kept the seal ring sealing between interior circle of cover plate and suit portion cylindrical simultaneously, makes the interior ring of silencing cavity have the two-stage sealing, has significantly reduced the pressure reduction of every inter-stage, thereby has strengthened sealability.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The plan view of the upper flange that Fig. 1 provides for the utility model embodiment;
Fig. 2 is the sectional view of Fig. 1 along the A-A line;
The plan view of the upper flange assembly that Fig. 3 provides for the utility model embodiment;
Fig. 4 is the sectional view of Fig. 3 along the B-B line;
The structural representation of the two stage compressor that Fig. 5 provides for the utility model embodiment.
Embodiment
The utility model discloses a kind of two stage compressor and upper flange assembly thereof,, reduce the processing request of outlet valve valve seat to simplify the structure of outlet valve.
To combine the accompanying drawing among the utility model embodiment below, the technological scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
See also Fig. 1 and Fig. 2, the plan view of the upper flange that Fig. 1 provides for the utility model embodiment, Fig. 2 is the sectional view of Fig. 1 along the A-A line.
The compressor that the utility model provides is used flange assembly, comprises upper flange 1 and cover plate 3, and upper flange 1 is provided with exhaust port; Wherein, the outlet side of exhaust port is provided with the outlet valve mounting hole with the coaxial setting of this exhaust port, and the outlet valve mounting hole is provided with outlet valve 2; The outlet side end face of upper flange 1 upper edge exhaust port is provided with ring-shaped valve seats 21; Ring-shaped valve seats 21 is used for cooperating with the valve body of outlet valve 2, and when the valve body of outlet valve 2 contacted with this ring-shaped valve seats 4, valve body was just in time blocked exhaust port.Outlet valve 2 specifically comprises lift limiter 24, elastic component 23 and valve body 22; Wherein, Lift limiter 24 is fixed on the upper flange 1; Specifically can this generation limiter 24 be fixed in the outlet valve mounting hole of upper flange, the upper end of lift limiter 24 is used for and being fixedly connected of outlet valve mounting hole, and the lower end is used for the Lift of limiting valve body.Elastic component 23 links to each other with lift limiter 24, and elastic component 23 is used to valve body pretightening force is provided, promptly after exhaust finishes; The pressure at exhaust port place reduces; Valve body holds out against valve body 22 on ring-shaped valve seats 24 under the effect of elastic component 23 elastic force, and blocks the outlet side of exhaust port.Valve body 22 links to each other with elastic component 23, and with the coaxial setting of exhaust port, under the exhaust condition, this valve body 22 does not offset with ring-shaped valve seats 21 because valve body 22 and the coaxial setting of exhaust port, so this valve body 22 can be blocked the relief opening of exhaust port.
The valve body 22 of the utility model closely cooperates with the mode that ring-shaped valve seats 21 contacts with line and carries out airtight to relief opening; The moving direction of valve body 22 is retrained by the outlet valve mounting hole; The maximum outside diameter of valve body 22 is slightly littler than the internal diameter of outlet valve mounting hole, prevents valve body 22 expanded by heating and stuck on the outlet valve mounting hole.Elastic component 23 is given valve body 22 applied thrusts, and then realizes opening and closing of control valve body 22.Lift limiter 24 is fixed on the upper flange 1, plays the effect of restriction elastic component 23 positions, and the other end is unsettled, plays the effect of limiting valve body 22 Lifts.When exhaust, gas pressure is greater than valve body 22 gravity and elastic component thrust sum, and valve body 22 is backed down, contact with the external part of lift limiter 24 behind the valve body 22 rising certain altitudes, and stop motion under the active force of lift limiter 24, accomplish up to exhaust.After exhaust was accomplished, under the acting in conjunction of elastic component 23 thrusts and valve body 22 gravity, valve body 22 walked downward, and finally this outlet valve is in closed condition.Exhaust structure on the upper flange assembly that the utility model provides is simple and compact, ring-shaped valve seats 21 easy processings, and the clearance volume that relief opening forms is little, and valve body 22 is compared with existing valve block, and its exhaust resistance is little.
The ring-shaped valve seats 21 that the utility model provides can be the planar annular on the outlet side that is processed in exhaust port, annular arc surface, the conical surface or sphere.Valve body 22 can be centrum or spheroid, and the maximum outside diameter of this valve body 22 is greater than the internal diameter of exhaust port, as long as guarantee to block exhaust port.Ring-shaped valve seats 21 is processed into annular arc surface, the conical surface or sphere, and it has certain leading role to valve body 22, and ring-shaped valve seats 21 is processed into planar annular, is easier to processing, can be processed into the ring-shaped valve seats 21 of respective shapes according to corresponding demand.The sectional shape of valve body 22 is identical with the sectional shape of exhaust port, and is general, and exhaust port is a circular cross-section, and so corresponding valve body 22 also should have the structure of circular cross-section, and cone, spheroid or the cylindrical body etc. that provide like present embodiment have the structure of circular cross-section.
See also Fig. 3 and Fig. 4, the plan view of the upper flange assembly that Fig. 3 provides for the utility model embodiment, Fig. 4 is the sectional view of Fig. 3 along the B-B line.
Upper flange 1 has the suit portion 13 that is sleeved on the compressor crank shaft and links to each other with the bottom of suit portion 13 and the flange skirt section 14 coaxial with suit portion 13; The top end 12 that the outer circumferential face of suit portion 13 is provided with flange skirt section 14 is positioned at the planar annular 11 on the same plane; Cover plate 3 be located on the top end 12 and planar annular 11 in flange skirt section 14, and seals through seal ring with suit portion 13.
The utility model is positioned at the planar annular 11 on the same plane through the top end 12 that on the outer circumferential face of the suit portion 13 of upper flange 1, is provided with flange skirt section 14; Because silencing cavity 4 forms between suit portion 13 and flange skirt section 14; Therefore in top end that cover plate 3 is located in flange skirt section 14 12 and 11 last times of planar annular; The surface of contact of cover plate 3 and planar annular 11 forms ring sealing in the one-level of silencing cavity 4, is provided with between suit portion 13 and cover plate 3 then that ring seals in the secondary that seal ring 5 constitutes silencing cavity 4.The utility model has kept seal ring 5 sealings between the cylindrical of interior circle and suit portion 13 of cover plate 4 simultaneously, makes the interior ring of silencing cavity 4 have the two-stage sealing, has significantly reduced the pressure reduction of every inter-stage, thereby has strengthened sealability.Above-mentioned seal ring 5 can be the O RunddichtringO, offers the circular groove that is used to place O-ring seals on the inner peripheral surface of cover plate 8.In order to guarantee closely cooperating between sealing plane, the top end 12 in planar annular 11, flange skirt section 14 and the counterface of cover plate 8 need correct grinding, or between them, add a gasket seal, the sealing during with the assurance plane contact.
See also Fig. 5, the structural representation of the two stage compressor that Fig. 5 provides for the utility model embodiment.
The invention also discloses a kind of two stage compressor with the open upper flange assembly (comprising upper flange 1 and cover plate) of the foregoing description.The two stage compressor that the utility model provides makes that through adopting above-mentioned upper flange assembly the structure of outlet valve is more simple and compact, and ring-shaped valve seats is easier to processing, and the clearance volume that relief opening forms is little, and valve body is compared with existing valve block, and its exhaust resistance is little.Have on the basis of above-mentioned advantage, make the interior ring of silencing cavity have the two-stage sealing, significantly reducing the pressure reduction of every inter-stage, thereby strengthened sealability.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and other embodiments' difference that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make related domain professional and technical personnel can realize or use the utility model.Multiple modification to these embodiments will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation of spirit that does not break away from the utility model or scope in other embodiments among this paper.Therefore, the utility model will can not be restricted to these embodiments shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (9)
1. a compressor is used flange assembly; Comprise upper flange (1) and cover plate (3), said upper flange (1) is provided with exhaust port, it is characterized in that; The outlet side of said exhaust port is provided with the outlet valve mounting hole with the coaxial setting of this exhaust port; Said outlet valve mounting hole is provided with outlet valve (2), and the outlet side end face of the said exhaust port in said upper flange (1) upper edge is provided with ring-shaped valve seats (21), and said outlet valve (2) specifically comprises:
Be fixed on the lift limiter (24) on the said upper flange (1);
The elastic component (23) that links to each other with said lift limiter (24);
Link to each other with said elastic component (23), and with the valve body (22) of the coaxial setting of said exhaust port, this valve body (22) offsets with said ring-shaped valve seats (21).
2. compressor as claimed in claim 1 is used flange assembly, it is characterized in that, said ring-shaped valve seats (21) is planar annular, annular arc surface, the conical surface or sphere on the outlet side that is processed in said exhaust port.
3. compressor as claimed in claim 1 is used flange assembly, it is characterized in that, said valve body (22) is centrum or spheroid, and the maximum outside diameter of this valve body (22) is greater than the internal diameter of said exhaust port.
4. compressor as claimed in claim 1 is used flange assembly, it is characterized in that, said elastic component (23) is cylindrical or conical pressure spring.
5. compressor as claimed in claim 1 is used flange assembly; It is characterized in that; Said lift limiter (24) is the stepped shaft cylindrical body; The end that its diameter is bigger is interference fitted on the said outlet valve mounting hole, and said elastic component (23) is sleeved on said lift limiter (24) to have on the end of less external diameter.
6. use flange assembly like each described compressor of claim 1-5; It is characterized in that; Said upper flange (1) has the suit portion (13) that is sleeved on the said compressor crank shaft and links to each other and the flange skirt section (14) coaxial with said suit portion (13) with the bottom of said suit portion (13); The top end (12) that the outer circumferential face of said suit portion (13) is provided with said flange skirt section (14) is positioned at the planar annular (11) on the same plane; Said cover plate (3) be located on the top end (12) and said planar annular (11) in said flange skirt section (14), and seals through seal ring with said suit portion (13).
7. compressor as claimed in claim 6 is used flange assembly, it is characterized in that, said seal ring is the O RunddichtringO.
8. compressor as claimed in claim 6 is used flange assembly, it is characterized in that, is provided with sealing gasket between said planar annular (11) and the said cover plate (3).
9. a two stage compressor comprises the upper flange assembly, it is characterized in that, said upper flange assembly is like each described upper flange assembly of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120153448U CN202132202U (en) | 2011-05-13 | 2011-05-13 | Two-stage compressor and upper flange assembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120153448U CN202132202U (en) | 2011-05-13 | 2011-05-13 | Two-stage compressor and upper flange assembly thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202132202U true CN202132202U (en) | 2012-02-01 |
Family
ID=45520972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120153448U Expired - Lifetime CN202132202U (en) | 2011-05-13 | 2011-05-13 | Two-stage compressor and upper flange assembly thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202132202U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963435A (en) * | 2020-07-24 | 2020-11-20 | 珠海格力电器股份有限公司 | Compressor and air conditioner |
| CN111963433A (en) * | 2020-07-24 | 2020-11-20 | 珠海格力电器股份有限公司 | Compressor and air conditioner |
| CN114198286A (en) * | 2021-12-08 | 2022-03-18 | 郑州轻工业大学 | Reciprocating compressor |
| CN114198286B (en) * | 2021-12-08 | 2024-10-25 | 郑州轻工业大学 | Reciprocating compressor |
-
2011
- 2011-05-13 CN CN201120153448U patent/CN202132202U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963435A (en) * | 2020-07-24 | 2020-11-20 | 珠海格力电器股份有限公司 | Compressor and air conditioner |
| CN111963433A (en) * | 2020-07-24 | 2020-11-20 | 珠海格力电器股份有限公司 | Compressor and air conditioner |
| CN111963435B (en) * | 2020-07-24 | 2022-08-05 | 珠海格力电器股份有限公司 | Compressor and air conditioner |
| CN114198286A (en) * | 2021-12-08 | 2022-03-18 | 郑州轻工业大学 | Reciprocating compressor |
| CN114198286B (en) * | 2021-12-08 | 2024-10-25 | 郑州轻工业大学 | Reciprocating compressor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2298390Y (en) | Safety valve | |
| CA2487982A1 (en) | Pneumatic compressor bleed valve | |
| CN103591347A (en) | Magnetic force type emergency release valve | |
| CN202132202U (en) | Two-stage compressor and upper flange assembly thereof | |
| CN102011879A (en) | Oxygen valve | |
| CN109944965A (en) | A kind of safety valve mechanism of airborne chemical oxygen-producing device | |
| CN107120258B (en) | A kind of inversion type air compressor gas valve | |
| CN105042092A (en) | Supercritical high-pressure double-flap pressure relief sewage discharge type pneumatic flow regulating valve | |
| CN201865906U (en) | Spherical sealing combination valve for reciprocating valve | |
| CN201844075U (en) | Combined unloading valve | |
| CN211501821U (en) | Safety valve core opening device driven by air source | |
| CN202768866U (en) | Anti-abrasion vent valve | |
| CN114183690A (en) | Special joint sealing structure for high-pressure hydrogen storage container | |
| CN209654713U (en) | The pilot valve of pressure reducing valve | |
| CN208416914U (en) | High pressure liquid housing structure and Vertical Combination valve group | |
| CN100353058C (en) | Air valve of compressor | |
| CN202302054U (en) | Ahs discharge and conveying valve of gas dust removal system of blast furnace | |
| CN216044692U (en) | Piston for overflow valve and overflow valve | |
| CN206054752U (en) | A kind of natural gas used for automobile decompressor | |
| CN110374757A (en) | A kind of connection structure of valve mechanism cover and breather adapter | |
| CN218543250U (en) | Hard-sealing eccentric half ball valve | |
| CN217634068U (en) | High-sealing self-closing angle valve | |
| CN202203198U (en) | Relief block | |
| CN201013567Y (en) | Electric atomizer diaphram pump | |
| CN219809780U (en) | Nitrous oxide valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120201 |