CN110005863A - A kind of fire extinguisher valve control structure - Google Patents
A kind of fire extinguisher valve control structure Download PDFInfo
- Publication number
- CN110005863A CN110005863A CN201910293169.3A CN201910293169A CN110005863A CN 110005863 A CN110005863 A CN 110005863A CN 201910293169 A CN201910293169 A CN 201910293169A CN 110005863 A CN110005863 A CN 110005863A
- Authority
- CN
- China
- Prior art keywords
- spool
- valve rod
- valve
- sealing
- lower platen
- 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.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
- A62C13/76—Details or accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/48—Attaching valve members to screw-spindles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
- Lift Valve (AREA)
Abstract
The present invention relates to fire-fighting equipment technical fields, and disclose a kind of fire extinguisher valve control structure, including valve pocket, spool and valve rod, the valve rod and spool pivot bush unit, the outside of the valve rod and be located at spool fixing sleeve is connected to top board and lower platen respectively for two sides up and down, the top board is used for band movable valve plug and moves down, the lower platen is used for band movable valve plug and moves up, the bottom end of the spool and the periphery for being located at valve rod are fixedly connected with cushion rubber I, and the top of the lower platen is equipped with the cushion rubber II of arrangement corresponding with cushion rubber I.The present invention is by using pivot bush unit for spool and valve rod, and top board and lower platen the control valve rod operation valve core for being utilized respectively the two sides above and below spool move up and down, by the separation of lower platen and spool so that spool upper and lower sides air pressure balance, while ensureing sealing performance, handle is by pressure resistance caused by can be greatly reduced because of bottle inside and outside differential pressure, so that the sealing structure that Manual press valve rod opens spool is more laborsaving.
Description
Technical field
The present invention relates to fire-fighting equipment technical field, specially a kind of fire extinguisher valve control structure.
Background technique
Fire extinguisher is a kind of portable Fire extinguisher, can be divided into foam, dry powder, two according to the extinguishing chemical filled in fire extinguisher
The fire extinguishers such as carbonoxide, clear water, type is different, and used fire extinguisher bottleneck valve is difference.It is this kind of for carbon dioxide
Gas fire extinguisher is that carbon dioxide gas is compressed in bottle to store, and when use depresses handle, and gas vaporization discharges in bottle,
Higher for the sealing requirements of fire extinguisher bottleneck in daily storage, traditional valve sealing structure is at -20 degrees Celsius or less
Low temperature environment in using will appear the problem of fire extinguisher leaks, for this purpose, China Patent No. CN106678441B propose it is a kind of low
Warm extinguisher valve door holds out against valve rod lower seal using first back-moving spring, reaches sealing effect, and by close under valve rod
The conical design of seal further strengthens sealing effect, separately ensures fire extinguisher in service stage, valve by adaptive on off mechanism
The sealing problem on bar top and bottle neck has the good advantage of sealing reliability.
But above-mentioned valve sealing structure still remains following problems:
1, it is held out against due to valve rod lower seal by first back-moving spring, and due to the presence of the intracavitary high pressure gas of bottle, makes
The upper and lower surfaces of valve rod lower seal are obtained there are draught head, which can further hold out against valve rod lower seal in bottleneck
On the tapered surface in portion, sealing effect is realized, still, meeting fire dangerous situation in use, operator's Manual press handle, so that valve rod
Band movable valve plug moves down, and the pressure for needing manpower that the elastic force of first back-moving spring and draught head is overcome to be formed, this, which will cause equipment, makes
It is difficult to the problem of opening valve with the initial stage, there are the security risks of emergency handling；
2, the presence of adaptive on off mechanism, so that during handle pushes, the valve rod upper seal and bottle that gradually expand
The inner wall increased friction of neck further increases the manual pressure power of handle, so that the operation of equipment fire-fighting is laborious, for
It is unfavorable to dispose dangerous situation, simultaneously as fire extinguisher is placed at one, generally can seldom start, the resting period is longer, complicated linkage knot
Structure easily causes airway blockage unsmooth, is finally difficult to press handle, so that fire extinguisher fails, security risk is big.
A kind of extinguisher valve control structure is proposed thus, it is intended to be solved the above problems.
Summary of the invention
Existing insufficient in use for the existing extinguisher valve door proposed in background technique, the present invention mentions
A kind of fire extinguisher valve control structure has been supplied, had rapid operation, manufacture advantage convenient, that security risk is low, solution
It has determined the problems mentioned above in the background art.
The invention provides the following technical scheme: a kind of fire extinguisher valve control structure, including valve pocket, spool and valve
Bar, the valve rod and spool pivot bush unit and are located at the two sides up and down of spool fixing sleeve are connected to respectively the outside of the valve rod
Pressing plate and lower platen, the top board are used for band movable valve plug and move down, and the lower platen is used for band movable valve plug and moves up, the spool
Bottom end and the periphery for being located at valve rod are fixedly connected with cushion rubber I, and the top of the lower platen is equipped with the glue of arrangement corresponding with cushion rubber I
Circle II, the cushion rubber I contacts to form sealing structure with cushion rubber II, and the bottom end of the lower platen is equipped with sealing reset spring.
Preferably, the inner wall top of the valve pocket is equipped with sealing neck, the outside of the valve rod and above and below sealing neck
Two sides are respectively equipped with sealing-plug and envelope neck plug, and the sealing-plug is fixedly attached with valve rod, and the envelope neck plug and valve handle activity are socketed,
The outside of the valve rod and be located at envelope neck plug lower section be equipped with limited block.
Preferably, the vertical interval of the top board and lower platen is higher than the height of spool.
Preferably, the socket clearance distance of the valve rod and spool is the 1/4~1/3 of valve rod radius.
The present invention have it is following the utility model has the advantages that
1, the present invention is by using pivot bush unit for spool and valve rod, and is utilized respectively the upper pressure of the two sides above and below spool
Plate and lower platen control valve rod operation valve core move up and down, by the separation of lower platen and spool so that spool upper and lower sides air pressure is flat
Weighing apparatus, while ensureing sealing performance, handle is by pressure resistance caused by can be greatly reduced because of bottle inside and outside differential pressure, so that Manual press
The sealing structure that valve rod opens spool is more laborsaving.
2, the present invention sets sealing neck by the inner cavity top in valve pocket, and sealing-plug is respectively set in the top and the bottom of sealing neck
With envelope neck plug, and will envelope neck plug setting position and valve handle activity be socketed, i.e., using valve rod move down open valve when, sealing-plug and sealing
The upper top of neck fits closely sealing, while sealing neck plug by hyperbar percussion in bottle, closely pastes with the lower surface of sealing neck
It closes, under dual-seal, can more ensure fire extinguisher in the sealing performance of service stage bottleneck oral area, structure setting is simple, and not
The resistance that will increase depressed stem uses laborsaving convenience.
Detailed description of the invention
Fig. 1 is structure of the invention cross-sectional view；
Fig. 2 is partial enlargement diagram at spool of the present invention；
Fig. 3 is partial enlargement diagram at present invention sealing neck.
In figure: 1, upright pipe；2, valve pocket；3, outlet chamber；4, spool；4a, chassis；4b, rubber plug；5, valve rod；6, top board；
7, lower platen；8, reset spring is sealed；9, neck is sealed；10, sealing-plug；11, neck plug is sealed；12, cushion rubber I；13, cushion rubber II；14, it limits
Position block.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1-3, a kind of fire extinguisher valve control structure, including upright pipe 1, it is threadedly connected to upright pipe 1
The top of the valve pocket 2 of outside top, 2 inner cavity of valve pocket is equipped with horizontal outlet chamber 3 and longitudinal sealing chamber, in the downside of outlet chamber 3
And be located at the intracavity section size variation of valve pocket 2 and be equipped with spool 4, the outer surface of spool 4 is set as tapered surface, in valve pocket 2
Wall is adapted, and forms sealing structure face, and the longitudinal sealing of valve pocket 2 is intracavitary to be equipped with valve rod 5, and valve rod 5 and 4 pivot bush unit of spool simultaneously pass through
Wear spool 4, valve rod 5 can be moved up and down with respect to spool 4, valve rod 5 outside and be located at the upper and lower sides of spool 4 and be fixedly attached respectively
There are top board 6 and lower platen 7, wherein for convenient for assembly, lower platen 7 can be used screw threads for fastening form with valve rod 5 and be fixedly attached,
The vertical interval value of top board 6 and lower platen 7 is higher than the height value of spool 4, and the lower part of lower platen 7 is equipped with sealing reset spring 8,
The bottom end of sealing reset spring 8 is placed on the flange of upright 1 inner wall of pipe, and sealing reset spring 8 generates upward bullet to lower platen 7
Property thrust, the longitudinal sealing chamber top inner wall of valve pocket 2 and be located at outlet chamber 3 upside be equipped with sealing neck 9, sealing neck 9 can be with valve
Set 2 is integrally formed, and the upper and lower surface of sealing neck 9 is the tapered surface to concave, and valve rod 5 is through the inside of sealing neck 9, valve rod 5
Outside and be located at the upper and lower sides of sealing neck 9 and be respectively equipped with sealing-plug 10 and envelope neck plug 11, sealing-plug 10 and valve rod 5 use screw thread
Fastening socket, envelope neck plug 11 and 5 pivot bush unit of valve rod, sealing-plug 10 and the contact surface for sealing neck plug 11 and valve rod 5 are phase therewith
The tapered surface of adaptation, wherein to seal neck plug 11 convenient for fixed, valve rod 5 outside and be located at the lower section fixation of envelope neck plug 11 and set
There are two symmetrical limited blocks 14, is limited to the distance that moves down to envelope neck plug 11.
Wherein, spool 4 includes chassis 4a and rubber plug 4b, and the top socket of chassis 4a is embedded rubber plug 4b, and chassis 4a is to spiral shell
Line fixed spool 4 and valve rod 5, rubber plug 4b is to compression seal.The construction of sealing-plug 10 is similar to spool 4.
Wherein, the spacing for needing to limit top to sealing 9 bottom end of neck of envelope neck plug 11 will be consistently greater than 7 top of lower platen extremely
The spacing of 4 bottom end of spool.Ensure that lower platen 7 holds out against spool 4 when on the inner wall of valve pocket 2 with this, envelope neck plug 11 and sealing are multiple
Position spring 8 still has relative movement spacing, it can ensures the precondition of rubber plug 4b compression seal.
Wherein, the bottom surface of rubber plug 4b is equipped with cushion rubber I 12, and the top surface of lower platen 7 is equipped with cushion rubber II 13, cushion rubber I 12 and cushion rubber
II 13 form sealing structure under a touch.
Wherein, the socket gap radial spacing between valve rod 5 and spool 4 is the 1/4~1/3 of 5 radius of valve rod, the gap width
Setting, it is smaller can both to have ensured that differential pressure action formed resistance in the circumferentia in gap, meanwhile, guarantee the gas in upright pipe 1
It is passed through the top of spool 4, faster by the gap to achieve the effect that pressure balance drag reduction.
By spool 4 and valve rod 5 by way of socket, and reserved socket gap, known by formula F=PS, differential pressure action
It is the differential pressure action on the gap annulus area that valve rod 5 and spool 4 are socketed in the Resistance Value of lower platen 7, so, it is opposite to pass
The active area of pressure difference can be greatly reduced in the setting that the valve rod 5 of system is fixedly connected with spool 4, this method, to reduce resistance work
With when pressing valve rod 5 as a result, it is only necessary to overcome the elastic force for sealing reset spring 8 and lesser pressure drag, more
It is laborsaving.
Application method of the invention is as follows:
When fire extinguisher is stored, sealing reset spring 8 jacks up lower platen 7 upwards, is pushed up spool 4 to valve pocket 2 by lower platen 7
Inner wall tapered surface on, tapered surface is sealed, meanwhile, the contact of cushion rubber I 12 and cushion rubber II 13 fitting, by valve rod 5 and valve
The socket clearance seal of core 4；In use, opening insurance pin, pressing handle pushes valve rod 5, due to the work of pressure difference fire extinguisher
With spool 4 does not leave the inner wall tapered surface of valve pocket 2, and lower platen 7 is left by thrust, opposite spool 4, cushion rubber I 12 and glue
II 13 separation are enclosed, the high pressure gas in upright pipe 1 enters the top of spool 4 from the gap of valve rod 5 and spool 4, due on spool 4
Portion space is smaller, so that the space atmospheric pressure moment on 4 top of spool reaches the air pressure size of 4 lower part of spool, continues to press handle,
Top board 6 is contacted with spool 4, and band movable valve plug 4 moves down, and thoroughly opens the seal at 2 inner wall tapered surface of valve pocket, at this point, sealing
It fills in 10 depressed power effects and is bonded with the upper top surface of sealing neck 9, sealed, gas is discharged from outlet chamber 3 in upright pipe 1
Meanwhile envelope neck plug 11 is impacted, so that envelope neck plug 11 is bonded with the lower ground for sealing neck 9, seal；After terminating use, release pressure
, under the elastic force effect of sealing reset spring 8, lower platen 7 is moved up, and is bonded with spool 4, and cushion rubber I 12 is bonded with cushion rubber II 13,
Band movable valve plug 4 continues to move up, and spool 4 is bonded with the tapered slope of 2 inner wall of valve pocket, completes sealing, and sealing-plug 10 also leaves simultaneously
The top surface of neck 9 is sealed, neck plug 11 is sealed by being self-possessed, drops down on limited block 14；When the installation of the valve, sealing-plug 10 is first backed out, it will
Valve rod 5 is inserted into from the lower part of valve pocket 2, is then screwed on sealing-plug 10, then cover upper valve core 4, is screwed on lower platen 7, and it is multiple to install sealing
Position spring 8 finally again twists valve pocket 2 solid in the outside of upright pipe 1.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (4)
1. a kind of fire extinguisher valve control structure, including valve pocket (2), spool (4) and valve rod (5), it is characterised in that: described
Valve rod (5) and spool (4) pivot bush unit, the outside of the valve rod (5) and the two sides up and down for being located at spool (4) are fixedly attached respectively
There are top board (6) and lower platen (7), the top board (6) is used for band movable valve plug (4) and moves down, and the lower platen (7) is for driving
Spool (4) moves up, the bottom end of the spool (4) and be located at valve rod (5) periphery be fixedly connected with cushion rubber I (12), the pushing
The top of plate (7) is equipped with the cushion rubber II (13) of arrangement corresponding with cushion rubber I (12), and the cushion rubber I (12) connects with cushion rubber II (13)
Touching forms sealing structure, and the bottom end of the lower platen (7) is equipped with sealing reset spring (8).
2. a kind of fire extinguisher valve control structure according to claim 1, it is characterised in that: the valve pocket (2)
Inner wall top is respectively equipped with sealing equipped with sealing neck (9), the outside of the valve rod (5) and the two sides up and down for being located at sealing neck (9)
(10) and envelope neck plug (11) are filled in, the sealing-plug (10) is fixedly attached with valve rod (5), and the envelope neck plug (11) and valve rod (5) are living
Dynamic socket, the outside of the valve rod (5) and the lower section for being located at envelope neck plug (11) are equipped with limited block (14).
3. a kind of fire extinguisher valve control structure according to claim 1, it is characterised in that: the top board (6)
It is higher than the height of spool (4) with the vertical interval of lower platen (7).
4. a kind of fire extinguisher valve control structure according to claim 1, it is characterised in that: the valve rod (5) with
The socket clearance distance of spool (4) is the 1/4~1/3 of valve rod (5) radius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910293169.3A CN110005863B (en) | 2019-04-12 | 2019-04-12 | Fire extinguisher valve control structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910293169.3A CN110005863B (en) | 2019-04-12 | 2019-04-12 | Fire extinguisher valve control structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110005863A true CN110005863A (en) | 2019-07-12 |
| CN110005863B CN110005863B (en) | 2020-09-08 |
Family
ID=67171370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910293169.3A Active CN110005863B (en) | 2019-04-12 | 2019-04-12 | Fire extinguisher valve control structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110005863B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112451883A (en) * | 2019-09-09 | 2021-03-09 | 镇远精密动力股份有限公司 | Fire extinguishing device |
| CN114658871A (en) * | 2022-02-18 | 2022-06-24 | 何婧 | Multistage sealing refrigeration valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4822003A (en) * | 1987-06-01 | 1989-04-18 | Freddy Self | Valve for fire extinguisher |
| DD293966A5 (en) * | 1990-04-27 | 1991-09-19 | Veb Feuerloeschgeraete Neuruppin,De | PRESSURE LEVER VALVE FOR HANDFILTER LOADER |
| CN2541685Y (en) * | 2002-05-13 | 2003-03-26 | 李挺 | Water closer |
| CN104633145A (en) * | 2015-02-10 | 2015-05-20 | 宁津宝华机械有限公司 | Graded pressure relief sealing device |
| CN204637372U (en) * | 2015-05-20 | 2015-09-16 | 宁波凯拓阀门有限公司 | A kind of extinguisher valve assembly |
| CN106678441A (en) * | 2016-11-16 | 2017-05-17 | 浙江欧伦泰防火设备有限公司 | Low-temperature fire extinguisher valve structure |
| CN208634462U (en) * | 2018-06-22 | 2019-03-22 | 上海海越安全工程设备有限公司 | A kind of spy fire tube container value |
-
2019
- 2019-04-12 CN CN201910293169.3A patent/CN110005863B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4822003A (en) * | 1987-06-01 | 1989-04-18 | Freddy Self | Valve for fire extinguisher |
| DD293966A5 (en) * | 1990-04-27 | 1991-09-19 | Veb Feuerloeschgeraete Neuruppin,De | PRESSURE LEVER VALVE FOR HANDFILTER LOADER |
| CN2541685Y (en) * | 2002-05-13 | 2003-03-26 | 李挺 | Water closer |
| CN104633145A (en) * | 2015-02-10 | 2015-05-20 | 宁津宝华机械有限公司 | Graded pressure relief sealing device |
| CN204637372U (en) * | 2015-05-20 | 2015-09-16 | 宁波凯拓阀门有限公司 | A kind of extinguisher valve assembly |
| CN106678441A (en) * | 2016-11-16 | 2017-05-17 | 浙江欧伦泰防火设备有限公司 | Low-temperature fire extinguisher valve structure |
| CN208634462U (en) * | 2018-06-22 | 2019-03-22 | 上海海越安全工程设备有限公司 | A kind of spy fire tube container value |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112451883A (en) * | 2019-09-09 | 2021-03-09 | 镇远精密动力股份有限公司 | Fire extinguishing device |
| CN112451883B (en) * | 2019-09-09 | 2021-09-24 | 镇远精密动力股份有限公司 | Fire extinguishing device |
| CN114658871A (en) * | 2022-02-18 | 2022-06-24 | 何婧 | Multistage sealing refrigeration valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110005863B (en) | 2020-09-08 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20200814 Address after: 325600 No.22, Huifeng Road, Lecheng street, Yueqing City, Wenzhou City, Zhejiang Province Applicant after: Zongda Electric Co.,Ltd. Address before: No. 80, Yaotou Village, Yantou Town, Yongjia County, Wenzhou City, Zhejiang Province, 325000 Applicant before: Xu Yuping |
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