CN102825395B - The braze-welded structure of a kind of adapter and valve seat - Google Patents
The braze-welded structure of a kind of adapter and valve seat Download PDFInfo
- Publication number
- CN102825395B CN102825395B CN201110164879.XA CN201110164879A CN102825395B CN 102825395 B CN102825395 B CN 102825395B CN 201110164879 A CN201110164879 A CN 201110164879A CN 102825395 B CN102825395 B CN 102825395B
- Authority
- CN
- China
- Prior art keywords
- adapter
- valve seat
- mating surface
- braze
- welded structure
- 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.)
- Active
Links
Landscapes
- Valve Housings (AREA)
Abstract
The present invention discloses a kind of adapter and the braze-welded structure of valve seat, and the position of described adapter and valve seat soldering forms circumferential mating surface, and described circumferential mating surface has the interference fit portion and matched in clearance portion that circumference sets gradually.Compared with prior art, adapter and valve seat brazed portions are formed circumferential mating surface and are divided into two kinds of matching relationships by braze-welded structure provided by the invention, that is, this circumferential mating surface has the interference fit portion and matched in clearance portion that circumference sets gradually.Its interference fit portion, for setting up weldering prelocalization between the two, makes welding sequence not need to coordinate clamp fixture, is applicable to produce in enormous quantities, can effective Controlling Technology cost; Its auxiliary section, gap for the formation of soldering capillary gap, thus guarantees that solder effectively permeates, for raising welding quality and weld strength provide reliable guarantee.
Description
Technical field
The present invention relates to braze-welded structure designing technique, be specifically related to the braze-welded structure of a kind of adapter and valve seat.
Background technology
At refrigeration technology field, all kinds of valve all needs to carry out pipeline connection in use.Under most occasion, valve series products needs set firmly an adapter, to realize being connected with equipment or system by adapter transition.
In prior art, above-mentioned adapter is substantially all adopt cylinder copper pipe or steel pipe, and is fixed by soldering processes and valve body.During welding, adds solder, and this position carries out heating making brazing filler metal melts at adapter and the matching part of valve body, the fill solder after fusing is at the matching part of adapter with valve body, and then realization being tightly connected between the two.At present, adapter with valve body be combined with following several technical scheme:
One, valve seat is arranged and installing hole corresponding to adapter, take over and be inserted in this installing hole, its outer surface and installing hole realize coordinating, specifically can magnetic valve shown in Fig. 2 in the Japanese documentation being JP2010-25300 see publication number;
Its two, valve seat is arranged and protuberance corresponding to adapter, take over and be sleeved on this protuberance, its inner peripheral surface and protuberance realize coordinating, specifically can magnetic valve shown in Fig. 1 in the Japanese documentation being JP2010-25300 see publication number;
They are three years old, valve seat arranges the annular groove corresponding with adapter, adapter is placed in this annular groove, its outer surface and the lateral wall of groove realize coordinating, its inner peripheral surface realizes coordinating with the madial wall of groove, specifically can electric expansion valve shown in Fig. 1 in the Japanese documentation being JP2008-128603 see publication number.
Above three kinds of adapters all adopt cylindrical shape take over the fit system of valve body, the inner peripheral surface that this cylindrical shape is taken over and/or interference fit or matched in clearance between outer surface and the mating surface of valve seat, and carry out soldering at matching part and fix.But by the restriction of two kinds of fit structure own characteristics, matching part adopts interference fit or matched in clearance all to have respective deficiency.
Interference fit is adopted for adapter and valve seat, although adapter is better with the locating effect of valve seat, in the process of product turnover before welding, not easily produces between the two and loosen.But because adapter and the mating surface of valve seat only exist very little microscopic gaps, be unfavorable for the capillary percolation of solder, when the magnitude of interference is larger, solder even cannot effectively permeate, thus affects welding quality, cannot ensure adapter bonding strength.
Matched in clearance is adopted for adapter and valve seat, on the one hand, do not realize locating by coordinating with valve seat owing to welding front adapter, must be positioned by frock butt tube and valve seat during welding, and in actual production process, the adapter of corresponding different length or different bend pipe shape, needs the frock preparing different location dimension, considerably increases the processing cost of soldering operation.In addition, adopt matched in clearance to need by the clearance control of mating surface within limits, if gap is bigger than normal, the capillarity after brazing filler metal melts can be weakened, cause the generation of pore, and then affect weld strength.
In view of this, be urgently optimized design for adapter and the braze-welded structure of valve seat, on the basis ensureing soldering reliability between the two, effective location can be formed between adapter before brazing and valve seat.
Summary of the invention
For above-mentioned defect, the technical problem that the present invention solves is to provide a kind of adapter and the braze-welded structure of valve seat, carries out weldering prelocalization, can effectively ensure soldering reliability between the two by structure optimization without the need to frock.
A kind of adapter provided by the invention and the braze-welded structure of valve seat, the position of described adapter and valve seat soldering forms circumferential mating surface, and described circumferential mating surface has the interference fit portion and matched in clearance portion that circumference sets gradually.
Preferably, described circumferential mating surface is formed at and cylindrical mating surface on described valve seat and described adapter is circumferentially disposed with between protuberance and recess, to form described interference fit portion and matched in clearance portion.
Preferably, described circumferential mating surface is formed at and cylindrical mating surface in described adapter and described valve seat is circumferentially disposed with between protuberance and recess, to form described interference fit portion and matched in clearance portion.
Preferably, described protuberance and recess are specially the radial large scale place of non-circular surfaces and radial small size place.
Preferably, describedly non-circularly polygon or ellipse is specially.
Preferably, described adapter has pit part with the end face of described valve seat opposite side.
Preferably, described pit part is multiple and is circumferentially distributed on the end face of described adapter.
Preferably, described valve seat is provided with installing hole, and described adapter is plugged in described installing hole; Described circumferential mating surface is formed between the outer surface of described adapter and the inner surface of described installing hole.
Preferably, described valve seat is provided with projection is installed, and described adapter is set in described installation projection; Described circumferential mating surface is formed at described installation between protruding outer surface and the inner surface of described adapter.
Preferably, described valve seat is provided with annular groove, and described adapter is placed in described annular groove; Described circumferential mating surface is formed between outer, the inner peripheral surface of outer, the inner peripheral surface of described annular groove and described adapter.
Compared with prior art, adapter and valve seat brazed portions are formed circumferential mating surface and are divided into two kinds of matching relationships by braze-welded structure provided by the invention, that is, this circumferential mating surface has the interference fit portion and matched in clearance portion that circumference sets gradually.Wherein, interference fit portion, for setting up weldering prelocalization between the two, makes welding sequence not need to coordinate clamp fixture, is applicable to produce in enormous quantities, can effective Controlling Technology cost; Wherein, matched in clearance portion for the formation of soldering capillary gap, thus guarantees that solder effectively permeates, for raising welding quality and weld strength provide reliable guarantee.
Accompanying drawing explanation
Fig. 1 is the braze-welded structure schematic diagram of adapter and valve seat described in the first embodiment;
Fig. 2 is the A-A profile of Fig. 1;
Fig. 3 is that the axle taken over shown in Fig. 1 measures intention;
Fig. 4 is the braze-welded structure schematic diagram of adapter and valve seat described in the second embodiment;
Fig. 5 is the B-B profile of Fig. 4;
Fig. 6 is that the axle taken over shown in Fig. 4 measures intention;
Fig. 7 is the braze-welded structure schematic diagram of adapter and valve seat described in the 3rd embodiment;
Fig. 8 is the C-C profile of Fig. 7;
Fig. 9 is that the axle taken over shown in Fig. 7 measures intention;
Figure 10 is that the axle taken over described in the 4th embodiment measures intention;
Figure 11 is the braze-welded structure schematic diagram of adapter and valve seat shown in Figure 10;
Figure 12 is that the axle taken over described in the 5th embodiment measures intention;
Figure 13 is the matching relationship schematic diagram of adapter and valve seat installing hole shown in Figure 12.
In figure:
Valve seat 1, installing hole 11, installation projection 12, annular groove 13, adapter 2, protuberance 21, protuberance 21 ', recess 22, recess 22 ', pit part 23, adapter 3.
Detailed description of the invention
Core of the present invention is to provide a kind of adapter and the braze-welded structure of valve seat, and the circumferential mating surface that adapter and valve seat brazed portions are formed is divided into two kinds of matching relationships by it, and namely this circumferential mating surface has the interference fit portion and matched in clearance portion that circumference sets gradually; Compared with prior art, on the basis ensureing soldering reliability between the two, effective location can be formed between adapter before brazing and valve seat.
Five preferred embodiments are illustrated below in conjunction with Figure of description.In each embodiment, identical parts or structure all adopt identical Reference numeral to refer to herein, so that understand formation identical between each embodiment and annexation.
Refer to Fig. 1, Fig. 2 and Fig. 3, wherein, Fig. 1 is the braze-welded structure schematic diagram of adapter and valve seat described in the first embodiment; Fig. 2 is the A-A profile of Fig. 1; Fig. 3 is that the axle taken over shown in Fig. 1 measures intention.
As shown in the figure, valve seat 1 is connected with two adapters: the adapter 2 of vertical setting and the adapter 3, two of horizontally set are taken over and all adopted soldering processes and valve seat 1 to be tightly connected.Shown in figure, black full-filling region representation solder obturator between adapter and valve seat.Without loss of generality, be described in detail with the braze-welded structure between the adapter 2 vertically arranged and valve seat 1 herein.
In the present embodiment, adapter 2 is plugged in the installing hole 11 of valve seat 1 lower end, and the outer surface of adapter 2 coordinates with the inner peripheral surface of valve seat 1 installing hole 11 and forms described circumferential mating surface.As shown in Figure 2, the tube wall of adapter 2 upper end is shaped to nearly hexagon shape, be plugged in after in valve seat 1 installing hole 11, six angles place of nearly hexagonal adapter 2 outer surface is protuberance 21, this protuberance 21 forms interference fit portion with valve seat 1 installing hole 11 inner peripheral surface, to complete the pre-determined bit before both welding; Be recess 22 outside six limits of nearly hexagonal adapter 2 outer surface, this recess 22 forms matched in clearance portion with valve seat 1 installing hole 11 inner peripheral surface, and then forms good soldering capillary gap, guarantees that solder effectively permeates.
Should be appreciated that the formation of this protuberance 21 and recess 22 is not limited to the nearly hexagon shown in figure, in fact, can be the polygon such as pentagon or quadrangle, also can be the non-circular surfaces such as ellipse, spline keyway; That is, relative to the radial direction of adapter, radial large scale place is the protuberance with valve seat installing hole 11 interference fit, and radial small size place is the recess with valve seat installing hole 11 matched in clearance, uses needs all in the scope of the application's request protection as long as meet.
As shown in Figure 3, adapter 2 upper end can adopt necking down process shaping, during practical operation, as long as control the size of adapter reducing die inwall well, effectively can control the formed precision of recess 22 in adapter 2 inner peripheral surface and protuberance 21, and then obtain between adapter 2 and valve seat 1 installing hole 11 and stablize the magnitude of interference and gap value.After the necking forming of adapter 2 upper end, by certain pressure, adapter 2 is press-fitted in the installing hole 11 of valve seat 1 lower end, due to the protuberance 21 on adapter 2 outer surface and the inner peripheral surface interference fit of valve seat 1 installing hole 11, adapter 2 is made to occur loosening or coming off in transport and the process had enough to meet the need, like this, valve seat 1 and adapter 2 do not need special frock butt tube to position when welding.Recess 22 on adapter 2 outer surface is matched in clearance with the inner peripheral surface of valve seat 1 installing hole 11, and the solder melted during welding is filled among above-mentioned gap easily via capillarity.The region of a shown in figure is the solder that adapter 2 outer wall is filled, and above-mentioned solder major part is filled in position, gap, and certainly, interference position also exists microcosmic gap, and less solder also can penetrate into above-mentioned position.
It should be noted that, the protuberance 21 on adapter 2 outer surface and recess 22 are not limited to and adopt necking down process to be formed, and such as, machine cut is processed; By contrast, necking down process cost is lower, and is easy to shape, therefore is optimal case.
Based on the core design thought of this programme, above-mentioned matching relationship also can be formed between the inner peripheral surface of adapter 2 and the fit structure of valve seat 1.Specifically please also refer to Fig. 4, Fig. 5 and Fig. 6, wherein, Fig. 4 is the braze-welded structure schematic diagram of adapter and valve seat described in the second embodiment; Fig. 5 is the B-B profile of Fig. 4; Fig. 6 is that the axle taken over shown in Fig. 4 measures intention.
The agent structure of the present embodiment is roughly the same with the first embodiment, difference be the inner peripheral surface of adapter 2 be set on valve seat 1 arrange installation projection 12 on form circumferential mating surface, that is, this circumferential mating surface be formed at install protruding 12 between outer surface and the inner surface of adapter 2.As shown in Figure 5, the tube wall of adapter 2 upper end is shaped to nearly hexagon shape, be set in valve seat 1 to install after in projection, six limits place of nearly hexagonal adapter 2 inner peripheral surface is protuberance 21 ', the outer surface that this protuberance 21 ' and valve seat 1 install protruding 12 forms interference fit portion, to complete the pre-determined bit before both welding; Six angles place of nearly hexagonal adapter 2 inner peripheral surface is recess 22 ', and the outer surface that this recess 22 ' and valve seat 1 install protruding 12 forms matched in clearance portion, and then forms good soldering capillary gap.
As shown in Figure 6, adapter 2 upper end can adopt enlarging technological forming, during practical operation, as long as control the size of adapter flaring die outer wall well, effectively can control the formed precision of recess in adapter 2 inner peripheral surface 22 ' and protuberance 21 ', so obtain adapter 2 and valve seat 1 install protruding 12 between stablize the magnitude of interference and gap value.After the flare formation of adapter 2 upper end, by certain pressure, adapter 2 is press-fitted into protruding 12 peripheries of installation of valve seat 1 lower end, due to the protuberance 21 ' in adapter 2 inner peripheral surface and valve seat 1 installing protruding 12 outer surface interference fit, adapter 2 is made to occur loosening or coming off in transport and the process had enough to meet the need, like this, valve seat 1 and adapter 2 do not need special frock butt tube to position when welding.Outer surface recess in adapter 2 inner peripheral surface 22 ' and valve seat 1 being installed projection 12 is matched in clearance, and the solder melted during welding is filled among above-mentioned gap easily via capillarity.The region of b shown in figure is the solder that nozzle inner wall is filled.
Certainly, also effectively can utilize that the inner and outer circumferential lateral face of adapter 2 is common and valve seat 1 is suitable.Please also refer to Fig. 7, Fig. 8 and Fig. 9, wherein, Fig. 7 is the braze-welded structure schematic diagram of adapter and valve seat described in the 3rd embodiment; Fig. 8 is the C-C profile of Fig. 7; Fig. 9 is that the axle taken over shown in Fig. 7 measures intention.
The present embodiment is equivalent to the combination of the first embodiment and the second embodiment, valve seat 1 is provided with an annular groove 13, and adapter 2 is placed in annular groove 13; Circumference mating surface is formed between outer, the inner peripheral surface of outer, the inner peripheral surface of annular groove and adapter.Said annular groove inner peripheral surface as shown in Figure 8 herein, the tube wall of adapter 2 upper end is shaped to nearly hexagon equally, to be built on valve seat 1 after in annular groove 13, six angles place of nearly hexagonal adapter 2 outer surface is protuberance 21, six limits place of nearly hexagon adapter 2 inner peripheral surface also forms protuberance 21 ', two protuberances are formed to the internal and external circumferential surface of annular groove 13 respectively and also form corresponding interference fit portion, to complete the pre-determined bit before both welding; Six limits place of nearly hexagonal adapter 2 outer surface forms recess 22, six angles place of nearly hexagon adapter 2 inner peripheral surface also forms recess 22 ', two recesses form matched in clearance portion with the internal and external circumferential surface of annular groove 13 respectively, and then form good soldering capillary gap.
As shown in Figure 9, adapter 2 upper end can adopt the mode of enlarging, just can control nozzle inner wall size accurately as long as control the outer wall dimension of flaring die well.As shown in Figure 8, a region is the solder that adapter 2 outer surface is filled, and b region is the solder that adapter 2 inner peripheral surface is filled.Adapter 2 upper end of the present embodiment also can adopt the mode of reducing to be shaped to similar polygonal shape.Equally, other molding modes also can be adopted to process.Compared with the first embodiment or the second embodiment, the reliability of positioning of this programme and soldering strength are all able to further enhancing.
For improving brazing quality and precision further, the 4th embodiment has made corresponding structure optimization.Please also refer to Figure 10 and Figure 11, wherein, Figure 10 is that the axle taken over described in the 4th embodiment measures intention; Figure 11 is the braze-welded structure schematic diagram of adapter and valve seat shown in Figure 10.
On the basis of the second embodiment, the present embodiment is provided with pit part 23 in adapter 2 with the end face of valve seat 1 opposite side.According to actual needs, this pit part 23 is multiple and is circumferentially distributed on the end face of adapter 2, and like this, the molten solder in brazing process penetrates into adapter 2 end face by capillarity.
As shown in figure 11, after soldering, solder is penetrated into the inner peripheral surface of adapter 2 by pit part 23 by adapter 2 upper surface, makes between adapter 2 end face and valve seat 1 and adapter 2 inner peripheral surface and valve seat 1 lower end raised head face are all filled with solder.
Should be appreciated that the design of this pit part 23 goes for technical scheme described in the first embodiment and the 3rd embodiment completely, to strengthen soldering strength.Particularly, the internal and external circumferential surface for adapter 2 all will coordinate the 3rd embodiment, and this pit part 23 can be communicated with the surperficial gap needing solder to fill of internal and external circumferential by capillarity easily.
Each embodiment all adopts reducing or enlarging technological forming protuberance and recess above, other molding modes such as in fact, the formation of protuberance and recess can also adopt extruding, get ready.Refer to Figure 12 and Figure 13, wherein, the axle taken over described in Figure 12 the 5th embodiment measures intention; Figure 13 is the matching relationship schematic diagram of adapter and valve seat installing hole shown in Figure 12.
In this enforcement, the protuberance 21 between adapter 2 and valve seat installing hole and recess 22 extrude gets formation ready.As shown in the figure, protuberance 21 and recess 22 are four interval settings successively, and its design principle is identical with previous embodiment, therefore repeats no more.
Special instruction, the circumferential mating surface in above-described embodiment is all formed at and cylindrical mating surface on valve seat and adapter is circumferentially disposed with between protuberance and recess.Be understandable that, also can be such design, namely circumferential mating surface is formed at and cylindrical mating surface in adapter and valve seat is circumferentially disposed with between protuberance and recess, that is, mating surface in adapter is cylindrical, and the valve seat be mated is arranged corresponding protuberance and recess, to form corresponding interference fit portion and matched in clearance portion.Obviously, the adjustment of said structure configuration can meet use needs equally.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. the braze-welded structure of an adapter and valve seat, the position of described adapter and valve seat soldering forms circumferential mating surface, it is characterized in that, described circumferential mating surface has the interference fit portion and matched in clearance portion that circumference sets gradually, described circumferential mating surface is formed at and cylindrical mating surface on described valve seat and described adapter is circumferentially disposed with between protuberance and recess, to form described interference fit portion and matched in clearance portion; Described protuberance and recess are specially polygonal radial large scale place and radial small size place, and described recess and protuberance adopt necking down process or enlarging technological forming; Described adapter with the end face of described valve seat opposite side, there is pit part; Described pit part is multiple and is circumferentially distributed on the end face of described adapter, so that the molten solder in brazing process penetrates into the end face of described adapter by capillarity.
2. the braze-welded structure of adapter according to claim 1 and valve seat, is characterized in that, described circumferential mating surface or be set to:
Be formed at and cylindrical mating surface in described adapter and described valve seat be circumferentially disposed with between protuberance and recess, to form described interference fit portion and matched in clearance portion.
3. the braze-welded structure of adapter according to claim 1 and valve seat, is characterized in that, described valve seat is provided with installing hole, and described adapter is plugged in described installing hole; Described circumferential mating surface is formed between the outer surface of described adapter and the inner surface of described installing hole.
4. the braze-welded structure of adapter according to claim 1 and valve seat, is characterized in that, described valve seat is provided with and installs projection, and described adapter is set in described installation projection; Described circumferential mating surface is formed at described installation between protruding outer surface and the inner surface of described adapter.
5. the braze-welded structure of adapter according to claim 1 and valve seat, is characterized in that, described valve seat is provided with annular groove, and described adapter is placed in described annular groove; Described circumferential mating surface is formed between outer, the inner peripheral surface of outer, the inner peripheral surface of described annular groove and described adapter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110164879.XA CN102825395B (en) | 2011-06-17 | 2011-06-17 | The braze-welded structure of a kind of adapter and valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110164879.XA CN102825395B (en) | 2011-06-17 | 2011-06-17 | The braze-welded structure of a kind of adapter and valve seat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102825395A CN102825395A (en) | 2012-12-19 |
| CN102825395B true CN102825395B (en) | 2015-12-16 |
Family
ID=47328816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110164879.XA Active CN102825395B (en) | 2011-06-17 | 2011-06-17 | The braze-welded structure of a kind of adapter and valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102825395B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345407B (en) * | 2015-11-26 | 2018-05-15 | 安徽中鼎金亚汽车管件制造有限公司 | A kind of gear box hydraulic pipe production technology |
| CN106944696A (en) * | 2017-04-22 | 2017-07-14 | 广东鸿图南通压铸有限公司 | The welding procedure of powder metallurgy support and 1215 steel pipes |
| CN108980505B (en) * | 2017-05-31 | 2021-12-07 | 浙江盾安机械有限公司 | Fixing structure of connecting pipe and valve seat and processing method thereof |
| CN108436241B (en) * | 2018-02-11 | 2020-08-14 | 佛山市智晓科技服务有限公司 | Resistance welding method |
| CN114770105B (en) * | 2022-06-17 | 2022-10-04 | 机科发展科技股份有限公司 | Valve assembly system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59131781A (en) * | 1983-12-20 | 1984-07-28 | Sanyo Electric Co Ltd | Enclosed type motor-compressor |
| JP3180691B2 (en) * | 1996-11-15 | 2001-06-25 | 三菱電機株式会社 | Rotor of cage-type induction motor and method of manufacturing the same |
| JP2005098471A (en) * | 2003-08-26 | 2005-04-14 | Saginomiya Seisakusho Inc | Valve device and its manufacturing method |
| CN101737545B (en) * | 2008-11-06 | 2012-08-08 | 浙江三花股份有限公司 | Electromagnetic valve and processing method thereof |
| CN201747954U (en) * | 2010-08-25 | 2011-02-16 | 上海源泉电气科技有限公司 | Electronic expansion valve with split replaceable valve port |
-
2011
- 2011-06-17 CN CN201110164879.XA patent/CN102825395B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102825395A (en) | 2012-12-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102825395B (en) | The braze-welded structure of a kind of adapter and valve seat | |
| CN103174860B (en) | The fixed structure of a kind of adapter and valve seat | |
| CN102489660B (en) | Forging forming process of heteromorphic transition section of super large pressure vessel | |
| CN105499388B (en) | Divide the method for the swollen pattern tool of valve and the internal annular element with muscle of manufacture | |
| CN104390079A (en) | Lip seal welding type pipe fitting joint and mounting process thereof | |
| CN110814567A (en) | Brazed pipeline joint and machining method | |
| CN203725998U (en) | Welding assembly and valve body | |
| CN201439847U (en) | Connecting structure of valve body and pipe and pipe matching with valve body | |
| EP3023679B1 (en) | Electronic expansion valve and manufacturing method therefor | |
| CN108673063B (en) | Method for processing connecting pipe and flange of gasification furnace | |
| CN203907041U (en) | Spiral corrugated steel pipe with cold-bent angle steel flanges at two ends | |
| CN201829795U (en) | Flattening die of cable connector | |
| CN206539792U (en) | A kind of bushing and the mounting structure of adapter | |
| CN201856057U (en) | Welding anchor ear for special-shaped tank body of special vehicle | |
| CN204438880U (en) | For the flow collection pipe component of heat exchanger | |
| CN204328273U (en) | The connection locking structure of a kind of oil pipe and pipe joint | |
| CN213871611U (en) | Pipeline connecting assembly | |
| CN102672076B (en) | Device for necking grooved self-locking nut | |
| CN102886613B (en) | The welding method of furnace cover of gasification furnace upper connecting tube | |
| CN208559316U (en) | Welded joint structure for automobile brake hose | |
| CN219954357U (en) | Valve device | |
| CN202329375U (en) | Collecting pipe for heat exchanger, collecting pipe and connecting pipe assembly and heat exchanger | |
| CN219453227U (en) | Pipeline connection structure with self-locking function | |
| CN219004320U (en) | Tooling die for flaring of straight welded pipe | |
| CN219169297U (en) | Continuous pipe bending tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 312500 Xinchang, Zhejiang Qixing street under the Liquan Patentee after: Zhejiang three flower intelligent control Limited by Share Ltd Address before: 312500 Liquan village of Chengguan Zhejiang city of Shaoxing province Xinchang County town Patentee before: Zhejiang Sanhua Co., Ltd. |