CN108105445B - A kind of valve - Google Patents
A kind of valve Download PDFInfo
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- CN108105445B CN108105445B CN201611057796.XA CN201611057796A CN108105445B CN 108105445 B CN108105445 B CN 108105445B CN 201611057796 A CN201611057796 A CN 201611057796A CN 108105445 B CN108105445 B CN 108105445B
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- weld seam
- shell
- welding
- valve
- valve seat
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- 238000003466 welding Methods 0.000 claims abstract description 119
- 230000004927 fusion Effects 0.000 claims description 15
- 238000005057 refrigeration Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 description 29
- 238000010586 diagram Methods 0.000 description 15
- 239000000463 material Substances 0.000 description 13
- 230000035515 penetration Effects 0.000 description 10
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- 102000057593 human F8 Human genes 0.000 description 4
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- 238000005266 casting Methods 0.000 description 3
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- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
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- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008521 reorganization Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- 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
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
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- 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
- F16K27/10—Welded housings
- F16K27/102—Welded housings for lift-valves
Abstract
The present invention provides a kind of valve, can take into account the connection air-tightness and intensity of shell and valve seat, and structure is simple, be readily produced manufacture, has good service performance.The present invention includes valve seat and the cylindric shell with valve seat welding, and the valve rod in the shell is set, the binding site of the valve seat and the shell forms the first weld seam using continuous welding, the two uses in the side that the binding site is axially away from the valve seat and is intermittently welded to form the second interrupted in the circumferential weld seam, and welding energy used by second weld seam is greater than first weld seam.The present invention forms two weld seams by different welding procedures, to be respectively used to guarantee air-tightness and intensity, and then air-tightness and intensity are taken into account, and will not have an impact to the performance of valve, without the shell and valve seat using specific structure, it is easy to a wide range of interior application.
Description
Technical field
The present invention relates to refrigeration system technical fields, more particularly to a kind of valve.
Background technique
In refrigeration system, such as the transcritical vapor compression refrigerating plant of CO2 refrigerant, due to make in the state of overcritical
With, it is higher than the refrigerant of general refrigerant pressure, it needs using high-voltage resistant electronic expansion valve.To guarantee its high withstand voltage intensity, shell with
The material of valve seat has to select high-strength material, and needs to have and the comparable wall thickness of design pressure, while shell and valve seat
Junction requires high-intensitive and high-air-tightness.
Electric expansion valve used in general coolant refrigeration device, does not need very high resistance to pressure, the wall of shell and valve seat
The ratio that thickness can design is relatively thin, ensures that sufficient airtight bond strength by low energy welding.But supercritical steam pressure
While electric expansion valve used in compression apparatus, shell and valve seat are required using high-strength material, also its wall thickness is added
Thickness, if still welded using low energy, the fusion penetration of welding position is inadequate, cannot ensure sufficient airtight bond strength；If increasing
Add its welding energy, though can deepen fusion penetration, high welding heat will lead to the material internal grain of shell Yu valve seat welding position
Degree recombinates, and reduces welding position intensity, is unable to ensure high voltage, while high heat also results in temperature distortion and is damaged.
Fig. 1 and Fig. 2 are please referred to, Fig. 1 is a kind of cross-section structure signal of typical refrigeration system valve in the prior art
Figure；Fig. 2 is the structural schematic diagram of another typical shell in the prior art.
In view of the above technical problems, following two solution exists in the prior art:
In a solution, the integral thickness of shell 1 ' and valve seat 2 ' is thickeied, makes its thickness more than certain value,
Reaching recombinates material grain size even if high heat, and strength reduction, the intensity after reduction is still in claimed range, to meet weldering
Intensity requirement after connecing；
In another solution, only thickening casing 1 ' and 2 ' binding site thickness of valve seat, make its thickness in certain value
More than, reach even if high heat make material grain size recombinate, strength reduction, the intensity after reduction still in claimed range, from
And meet the intensity requirement after welding.
But there are some problems in above two solution:
In the first solution, by 1 ' Integral upset of shell, such as Fig. 1 is equipped with magnet rotor 3 ' since shell 1 ' is internal,
Shell 1 ' is external to be directly resulted between magnet rotor 3 ' and driving coil 4 ' equipped with driving coil 4 ' if 1 ' thickness of shell is thicker
Distance increases, its driving force is caused to be substantially reduced, working performance decline.
In second of solution, the only thickness of thickening casing 1 ' and 2 ' binding site of valve seat, although which can solve
Certainly between magnet rotor 3 ' and driving coil 4 ' apart from the problem of, such as Fig. 2, but since it requires the wall thickness of shell 1 ' or valve seat 2 ' not
Uniformly, this requires high and highly difficult processing method bring inefficient the processing method of part, keeps its cost of manufacture big
Amplitude increases, and is not able to satisfy batch production requirements.
Therefore, it needs to design a kind of valve, not influence the normal life of valve while taking into account air-tightness and intensity
It produces and uses.
Summary of the invention
The object of the present invention is to provide a kind of valve, the connection air-tightness and intensity of shell and valve seat can be taken into account, and is tied
Structure is simple, is readily produced manufacture, has good service performance.
To achieve the above object, the present invention provides a kind of valves, the cylindrical shape including valve seat and with valve seat welding
Shell, and the valve rod being arranged in the shell, the binding site of the valve seat and the shell is using continuous welding shape
At the first weld seam, the two to be formed in the circumferential in the side that the binding site is axially away from the valve seat using being intermittently welded
The second interrupted weld seam.
Valve of the invention forms the first weld seam using continuous welding in the binding site of valve seat and shell, to guarantee to weld
The air-tightness of socket part position；In the axial side of the first weld seam using being intermittently welded to form the second weld seam, to guarantee weld strength；Weldering
In termination process, welding energy used by the second weld seam is greater than the first weld seam, and welding energy used by the first weld seam is lower, no
The material crystal grain of welding position can be caused to recombinate, intensity and air-tightness would not also be had an impact because of the variation of crystal grain,
It ensure that the air-tightness of valve seat and cage connection by the first weld seam；Simultaneously as the second weld seam is carried out discontinuously using high-energy
Welding is formed by weld seam with biggish fusion penetration, can guarantee the connectivity robustness of valve seat and shell, being intermittently welded in addition makes
The second weld seam is discontinuous in the circumferential so that the corresponding welding position of the second weld seam is with " point " division, each heated position it
Between there is certain circumferential gap, the material in the gap site will not be influenced by welding energy, can be kept original
High-intensitive crystal grain, and then avoid generate large area crystal grain Reorganization generation, with will pass through the second weld seam improve connection can
While by property, strength reduction caused by avoiding because of crystal grain recombination.
As it can be seen that the present invention passes through different welding procedures compared with the connection type for using a weld seam in the prior art
Two weld seams are formed, to be respectively used to guarantee air-tightness and intensity, and then have taken into account air-tightness and intensity, and will not be to valve
Performance have an impact, without the shell and valve seat using specific structure, be easy to a wide range of in application.
Optionally, described to be intermittently welded and/or the continuous welding is using Laser Welding.
Optionally, it is intermittently welded with the continuous wall thickness for being all made of Laser Welding and the shell that welds when described 0.4
When between~1mm, the bonding power continuously welded is between 350~500W, and the bonding power being intermittently welded is 380
Between~550W.
Optionally, it is intermittently welded with the continuous wall thickness for being all made of Laser Welding and the shell that welds when described 0.4
When between~1mm, the welding depth of fusion continuously welded is less than the welding depth of fusion being intermittently welded.
Optionally, described to be intermittently welded as spot welding.
Optionally, the axial spacing of first weld seam and second weld seam is 0.2~1.5mm.
Optionally, when the outer diameter of the shell is 15~25mm, in second weld seam, the number of welds that is intermittently welded
It is 8~24.
Optionally, when the wall thickness of the shell and the valve seat is respectively less than predetermined value and difference is in preset range, institute
It states valve seat and connects a connecting plate in its radially inner side by being intermittently welded, first weld seam does not radially extend to the connection
Plate, second weld seam radially extend to the connecting plate by the shell, to be connected by the connecting plate and the valve seat
It connects.
Optionally, the valve seat is formed with the connecting plate in the side that the binding site is axially away from the shell
Attachment weld, the attachment weld and second weld seam are axially symmetric about first weld seam.
Optionally, the valve seat and the shell also have made of being intermittently welded or continuously welding at least one
Three weld seams, in the axial direction, the third weld seam are between first weld seam and second weld seam.
Optionally, the shell and the valve seat weld the valve of the electric expansion valve or solenoid valve to form refrigeration system
Body.
Detailed description of the invention
Fig. 1 is a kind of the schematic diagram of the section structure of typical refrigeration system valve in the prior art；
Fig. 2 is the structural schematic diagram of another typical shell in the prior art；
Fig. 3 is a kind of structural schematic diagram of set-up mode of refrigeration system valve in the prior art；
Fig. 4 is the partial enlargement diagram of part A in Fig. 3 when being welded using low energy；
When Fig. 5 is using high heat input weld, the partial enlargement diagram of part A in Fig. 3；
Fig. 6 is the structural schematic diagram of valve provided by the present invention in a specific embodiment；
Fig. 7 is the partial enlargement diagram of part B in Fig. 6；
Fig. 8 is the structural schematic diagram of weld seam part in valve shown in Fig. 6；
Fig. 9 is the relation schematic diagram of the welding energy and air-tightness continuously welded；
Figure 10 is the relation schematic diagram of the quantity and weld strength of spot welding when being intermittently welded；
Figure 11 is the welding energy being intermittently welded and the relation schematic diagram of weld strength；
Figure 12 is the axial spacing of the first weld seam and the second weld seam and the relation schematic diagram of weld strength；
Figure 13 is the structural schematic diagram of valve provided by the present invention welding portion in another embodiment specific implementation mode；
Figure 14 by using welding manner shown in Figure 13 welding formation valve weld seam schematic diagram.
In Fig. 1-2:
Shell 1 ', valve seat 2 ', magnet rotor 3 ', driving coil 4 ', weld seam 5 '；
In Fig. 3-14:
Valve seat 1, shell 2, the first weld seam 3, the second weld seam 4, connecting plate 5, attachment weld 6.
Specific embodiment
The present invention provides a kind of valve, the connection air-tightness and intensity of shell and valve seat can be taken into account, and structure is simple,
It is readily produced manufacture, there is good service performance.
Below in conjunction with attached drawing, the present invention is specifically introduced, so that those skilled in the art's accurate understanding is of the invention
Technical solution.
Axial, circumferential direction and radial direction as described herein are with valve use state for reference definition, under use state,
In valve, when opening and closing valve port, the direction of motion of valve rod be it is axial, around axial rings around direction be it is circumferential, perpendicular to axial
Direction is radial.
Fig. 3-5 is please referred to, as shown in figure 3, valve can be electric expansion valve, including valve seat 2 ' and and valve in the prior art
The shells 1 ' of 2 ' welding of seat, are set with magnet rotor 3 ' shell 1 ' is interior, execute valve opening and valve closing movement for driving stem.It is full
The use demand of sufficient high pressure-resistant refrigeration system, the high pressure-resistant electronics as used by the refrigerating plant using carbon dioxide refrigerant
Expansion valve needs to guarantee bonding strength and air-tightness while not increasing wall thickness.
As shown in figure 4, the fusion penetration of weld seam 5 ' is shallower when the welding energy used by shell 1 ' is welded with valve seat 2 ' is low,
It cannot ensure sufficient air-tightness, especially it cannot be guaranteed that bonding strength.As shown in figure 5, when welding energy is high, due to welding energy
It improves, the fusion penetration of weld seam 5 ' is obviously deepened, but the material crystal grain of welding position can recombinate, and crystal grain becomes larger, and intensity is caused to drop
It is low.
Due to the polycrystal being made of after metallic crystal many crystal grain, for the ambient temperature mechanical properties of metal, one
As be that grain size is more tiny, intensity and hardness are higher, while plasticity and toughness are also better.This is because crystal grain is thinner, plasticity becomes
Shape is dispersed in more crystal grain and carries out, and plastic deformation is also more uniform, and the stress concentration of generation is smaller；Moreover, crystal grain
Thinner, crystal boundary face is more, and crystal boundary is more tortuous, and indenting chance is more among crystal grain and crystal grain, is more unfavorable for crackle
It propagates and develops, more fasten each other, intensity and toughness are better.
Test proves, in unwelded position, crystal grain be it is smaller and intensive, the crystal grain recombinated after welding becomes larger, and crystal boundary
Direction it is roughly the same, almost tend to be parallel with fusion penetration, this causes the material easily to tear along the direction of crystal boundary, i.e. material
The strength reduction of matter tears readily along the direction trend of above-mentioned crystal boundary and is formed and destroyed.
As the above analysis, under high welding energy, while guaranteeing fusion penetration, hair that the position of weld seam 5 ' is highly vulnerable to breakage
Life is managed are as follows: and in the binding site of shell 1 ' and valve seat 2 ', it is while guarantees air-tightness and intensity requirement, it is entire circumferential whole
Using high heat input weld, lead to the recombination of the crystal grain occurrence of large-area of circumferential upper welding position, so as to cause strength reduction, in turn
It destroys.
For the technical problem, solution of the invention are as follows: separate the weld seam 5 ' for guaranteeing air-tightness and proof strength
Processing, that is, be divided into twice weld seam, is respectively used to guarantee air-tightness and intensity, by above-mentioned mechanism it is found that guaranteeing the same of air-tightness
When also ensure intensity, the solution of the present invention, which is equivalent to, to be provided dual intensity and guarantees.
Valve of the invention can be the valves such as electric expansion valve, solenoid valve or pressure switch, for ease of illustration of this hair
Bright structure is illustrated by taking electric expansion valve as an example below in conjunction with attached drawing.
As shown in fig. 6, valve may include valve seat 1 and shell 2 by taking electric expansion valve as an example, shell 2 is cylindrical shape, outside
Valve rod is equipped in shell 2, valve seat 1 and shell 2 weld, and are set with magnet rotor in shell 2, act for driving stem, with opening and closing
Valve port.
As shown in Figure 7 and Figure 8, valve seat 1 can be attached with shell 2 using two weld seams, 3 He of respectively the first weld seam
Second weld seam 4 when being welded, is abutted with the end face of the valve chamber open end of valve seat 1 with the end face of shell 2, this abutting part first
Position is the binding site of valve seat 1 and shell 2, is welded by the way of connecting welding in the binding site, is formed in week
Upward continuous first weld seam 3；Then, in the axial direction, the side in binding site far from valve seat 1 to be formed using being intermittently welded
Second weld seam 4, second weld seam 4 is interrupted in the circumferential, as shown in Figure 8.
In general, being intermittently welded as high heat input weld of using of the second weld seam 4, is continuously welded as used by the first weld seam 3
Low energy welding, height energy is that in contrast, specific standards are referred to the prior art.Therefore, in welding process, second
Welding energy used by weld seam 4 is greater than used welding energy when the welding of the first weld seam 3.
For the connection for realizing valve seat 1 and shell 2, a step can be processed in a side end face of valve seat 1 towards shell 2
Face, the step surface include the tubular face being radially bonded with the inner wall of shell 2 and the annular surface for being connected to the tubular face outer end, tubular
In step-like in axial, cross-sectional view, shell 2 is abutted with the end face of its axial one end with annular surface, and passes through company for face and annular surface
Continuous welding forms the first weld seam 3, as shown in Figure 7；The inner wall and tubular face paste of shell 2 close, and are intermittently welded to be formed using circumferential
Second weld seam 4 is radially extended by shell 2 to valve as shown in figure 8, the radial depth of the second weld seam 4 is greater than the first weld seam 3
The tubular face of seat 1, as shown in Figure 7.
In the present invention, on the one hand valve seat 1 and shell 2 are connected and sealed by the first weld seam 3, continuous welding is used
Welding energy it is lower, will not influence the crystal grain of material, valve seat 1 and shell 2 reliably connect by welding to be formed,
Guarantee connection air-tightness between the two；On the other hand, the second weld seam 4 can be formed using high heat input weld by being intermittently welded,
This high heat input weld has enough fusion penetrations, enables to shell 2 securely to connect with valve seat 1, simultaneously as being intermittently welded not
It will form the second weld seam 4 circumferentially to connect, so that each welding position of the second weld seam 4 is with similar dotted progresss circumferential direction division, into
And make between each heated position there are certain gap, the material of the gap location is not influenced by welding energy, keeps former
The high-intensitive crystal grain having, and then the crystal grain recombination that high heat input weld generates large area is avoided, it also avoids to recombinate because of crystal grain
And intensity is influenced, the intensity of the two has been taken into account while realizing that valve seat 1 is securely connect with shell 2, can satisfy use demand.
Moreover either the first weld seam 3 or the second weld seam 4 can be formed between valve seat 1 and shell 2 reliable
Connection, and welding has substantially no effect on intensity, is equal to and provides the dual guarantee of intensity.
In practice, being intermittently welded can be by the way of spot welding, so that the second weld seam 4 is distributed relatively in the circumferential
It is even, and weak ring is avoided the occurrence of, hereinafter it is illustrated by taking spot welding as an example.
Wherein, Laser Welding or other welding procedures can be used by being intermittently welded and continuously welding.
In the forming process of the first weld seam 3 and the second weld seam 4, need to welding procedure and the first weld seam 3 and second
The position etc. of weld seam 4 is effectively controlled, and is described in detail below in conjunction with Fig. 9-12.
First, since the position continuously welded only guarantees air-tightness, therefore to welding energy requirement relative loose, it can use
Low energy can also use high-energy, if but energy it is too low, molten wide is smaller, it is difficult to ensure that shell 2 and valve seat 1 are in circumferential connection gas
Close property；If energy is excessively high, the stomata for welding generation is more, equally will affect the connection air-tightness of shell 2 Yu valve seat 1.Institute
With for influence of the welding energy to welding airtightness of sequential welding, there are relationship as shown in Figure 9, those skilled in the art
The rule that can be provided according to Fig. 9 needs to select suitable welding energy for the first weld seam 3 according to welding.
The selection of welding energy is also related with the thickness of shell 2 and valve seat 1, in a kind of preferred embodiment, if even
Continuous welding uses Laser Welding, and when the wall thickness of shell 2 is between 0.4~1mm, the bonding power continuously welded can 350~
Between 500W, to guarantee to connect air-tightness.
Second, since the position being intermittently welded need to guarantee that its bonding strength, welding effect require shell 2 and valve seat 1 real
Now securely connection, by taking spot welding as an example, then should have certain requirement to the quantity of spot welding, cannot be effective if spot welding negligible amounts
Guarantee shell 2 and valve seat 1 weld strength.If spot welding quantity is extremely more, then the area of crystal grain recombination is bigger, tend to be continuous
The effect of weldering and worthless.So existing as shown in Figure 10 for influence of the number of welds to weld strength of spot welding
Rule, those skilled in the art can according to Figure 10 be the second weld seam 4 select suitable number of welds.
Meanwhile number of welds is also related to the outer diameter of shell 2 and valve seat 1 when welding, in a preferred embodiment, if shell
When 2 outer diameter is 15~25mm, the number of welds being intermittently welded in the second weld seam 4 can be 8~24.
Third, since the position being intermittently welded need to guarantee that its bonding strength, welding effect require shell 2 and valve seat 1 to connect
It connects securely, so should have certain requirement to the welding energy of spot welding, if energy is too low, welding penetration is inadequate, not can guarantee
Its weld strength；If energy is excessively high, the stomata for welding generation is more and worthless.So for the welding of spot welding
Influence of the energy to weld strength, forms curve graph shown in Figure 11, and those skilled in the art can be spot welding choosing according to the figure
Select suitable welding energy.
As described above, the selection of welding energy is related with the wall thickness of shell 2 and valve seat 1, if being intermittently welded also using sharp
Flush weld, when the wall thickness of shell 2 is between 0.4~1mm, the bonding power that is intermittently welded can between 380~550W, although
The range of the bonding power exist with bonding power range when continuous welding it is Chong Die, but in the weldering of same valve seat 1 and shell 2
In termination process, when choosing specific bonding power value, the welding energy being respectively intermittently welded should be greater than each welding continuously welded
Energy.
Fourth, the air-tightness and intensity point twice weld seam due to shell 2 and 1 welding position of valve seat are realized respectively, this
There should be certain requirement to the relative distance of twice welding.The first, the first weld seam 3 and the second weld seam 4 in the axial direction it is opposite away from
Do not answered from H it is too small, if apart from close, then the recombination of crystal grain caused by sequential welding will affect the intensity of spot welding position.The second, the
The relative distance H of one weld seam 3 and the second weld seam 4 in the axial direction do not answer it is excessive, if apart from far, then spot welding and sequential welding it
Between in the range of, can also generate high pressure and act on the position of the first weld seam 3, overall compressive resistance is caused to reduce.So needle
Influence to the axial distance between the first weld seam 3 and the second weld seam 4 to weld strength, there are curve shown in Figure 12, this fields
Technical staff can be that the first weld seam 3 and the second weld seam 4 select suitable axial spacing according to the curve.In preferred embodiment
In, as shown in figure 8, the axial spacing H of the first weld seam 3 and the second weld seam 4 can be 0.2~1.5mm.
In another preferred embodiment, when the wall thickness being intermittently welded and continuously welding is all made of Laser Welding and shell 2
When between 0.4~1mm, the welding depth of fusion continuously welded is less than the welding depth of fusion being intermittently welded, by continuous
Welding guarantees the air-tightness of connection, is intermittently welded guarantee weld strength, and continuously to weld and be intermittently welded and not generate greatly
The crystal grain of area recombinates, and takes into account connection air-tightness and reliability.
In addition, principle according to the present invention, can also be formed between the first weld seam 3 and the second weld seam 4 at least one
Three weld seams, the third weld seam can specifically be formed by the way of continuously welding or being intermittently welded, in the axial direction in the first weldering
Between seam 3 and the second weld seam 4.
The setting of third weld seam can further enhance the compressive resistance of valve, that is to say, that the present invention can be to weld seam
Quantity with no restrictions, be tightly connected as long as valve seat 1 and shell 2 are formed by the first weld seam 3, and in apart from valve seat in axial direction
It is the second weld seam 4 on the direction of 1 distalmost end, to guarantee the intensity of valve, if those skilled in the art can according to need setting
Dry third weld seam, or even the second weld seam 4 can also be arranged in the axial side of the first weld seam 3, and axial in the first weld seam 3
Third weld seam is set as needed in the other side.
When the connection type combined using the first weld seam 3, the second weld seam 4 and third weld seam, regardless of third weld seam is adopted
It is still intermittently welded with continuous welding, is referred to continuous welding and break above in connection with rule shown in Fig. 9-Figure 12
The technique etc. of continuous welding is limited, to form the valve met the requirements.
In addition, one of them can be thin-wall part in valve seat 1 and shell 2, another one is heavy section casting, or both
Think heavy section casting or be thin-wall part, when the two is thin-wall part, although present invention employs the mode of twice weld seam is simultaneous
Air-tightness and intensity are cared for, but since thin-wall part intensity itself is smaller, it is also possible to be unable to satisfy the use demand of pressure resistance.Its
In, thin-wall part and heavy section casting are referred to standard in the prior art and are determined.
For above situation, when valve seat 1 and shell 2 are thin-wall part, to weld convenient for welding and avoiding to the two
Intensity has an impact, and connecting plate 5 can also be arranged in the present invention, carries out specifically below in conjunction with Figure 13 and Figure 14 to this embodiment
It is bright.
As shown in Figure 13 and Figure 14, when shell 2 and valve seat 1 are thin-wall part, the wall thickness of the two is respectively less than predetermined value, and
The difference of the two is also in preset range, about predetermined value and preset range referring in the prior art about the standard of thin-wall part
It is configured；At this point, valve seat 1 can connect a connecting plate 5 in its radial inside by being intermittently welded, the connecting plate 5 is by valve
Seat 1 extends axially towards shell 2, and can cover the position of the first weld seam 3 and the second weld seam 4 in the axial direction；Shell 2 and valve
Seat 1 still forms the first weld seam 3 by continuously welding in the binding site of the two, and first weld seam 3 is circumferentially continuous, and in radial direction
On do not extend to connecting plate 5, shell 2 is in the axial side of the first weld seam 3, i.e., opposite with valve seat 1 and the formed weld seam of connecting plate 5
Side, be intermittently welded with connecting plate 5, and formed the second weld seam 4, at this point, the second weld seam 4 is radially by 2 company of extending to of shell
Fishplate bar 5, and the certain radial distance of connecting plate 5 is protruded into, then, the connection of valve seat 1 Yu shell 2 is realized by the connecting plate 5.
As shown in figure 13, in this embodiment, in fact, valve seat 1 and shell 2 are not directly connected to form the second weldering
Seam 4, but realized by connecting plate 5 and be indirectly connected with the bonding strength for guaranteeing shell 2 and valve seat 1, correspondingly, the second weld seam
4 are not formed directly between valve seat 1 and shell 2, and are formed between shell 2 and connecting plate 5, and connecting plate 5 is logical
It crosses to be intermittently welded and securely be connect with valve seat 1.
At this point, the wall thickness of shell 2 and valve seat 1 can be suitable, the axial end face of shell 2 and valve seat 1 can be abutted mutually, and
Connecting plate 5 is set in the inside of the two, is then connect respectively with shell 2 and valve seat 1 by connecting plate 5 again, and connection type is equal
Using being intermittently welded, according to above-mentioned principle, the intensity of valve seat 1 and shell 2 will not influence, it can also be by 5 pairs of the two of connecting plate
Reinforced, plays the role of stiffening plate, and then proof strength.
As shown in figure 14, connecting plate 5 can be an annular slab, and the inner wall of recline valve seat 1 and shell 2 is circumferentially around setting
It sets, herein, valve seat 1 can form the interrupted weld seam of circumferential direction, referred to as attachment weld 6 by being intermittently welded with connecting plate 5,
Continuous weld should have certain fusion penetration, be radially extended by valve seat 1 to connecting plate 5, and protrude into connecting plate 5 it is certain it is radial away from
From the attachment weld 6 is in the side that the first weld seam 3 is axially away from shell 2.
At this point, the two sides of 3 axial direction of the first weld seam form respectively two intermittent welds, connecting plate 5 and the welding of shell 2 are formed
Weld seam be in far from valve seat 1 direction, referred to as the second weld seam 4, connecting plate 5 and valve seat 1 welding formed weld seam be connection
Weld seam 6, the second weld seam 4 and attachment weld 6 can use corresponding welding procedure, can also be at a distance of the identical axis of the first weld seam 3
To distance, it might even be possible to about the first axially and symmetrically setting of weld seam 3.
Valve of the invention, when specially electric expansion valve or solenoid valve, shell 2 and valve seat 1 are using the above structure
Welding forms the valve body of respective valves, and the intracorporal structure of valve please refers to prior art setting, and details are not described herein again.
Valve provided by the present invention is described in detail above.Specific case used herein is to original of the invention
Reason and embodiment are expounded, and the above description of the embodiments is only for helping to understand the core idea of the present invention.It should
It points out, it for those skilled in the art, without departing from the principle of the present invention, can also be to this hair
Bright some improvement and modification can also be carried out, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.
Claims (11)
1. a kind of valve, the cylindric shell (2) including valve seat (1) and with the valve seat (1) welding, and be arranged described
Valve rod in shell (2), which is characterized in that the binding site of the valve seat (1) and the shell (2) is formed using continuous welding
First weld seam (3), the two uses to be intermittently welded in the side that the binding site is axially away from the valve seat (1) is formed in week
Interrupted the second weld seam (4) upwards；Welding energy used by second weld seam is greater than first weld seam.
2. valve as described in claim 1, which is characterized in that described to be intermittently welded and/or the continuous welding is using laser
Weldering.
3. valve as claimed in claim 2, which is characterized in that when described be intermittently welded is all made of laser with the continuous welding
Weldering and the shell (2) wall thickness between 0.4~1mm when, the bonding power continuously welded between 350~500W,
The bonding power being intermittently welded is between 380~550W.
4. valve as claimed in claim 2, which is characterized in that when described be intermittently welded is all made of laser with the continuous welding
When the wall thickness of weldering and the shell (2) is between 0.4~1mm, the welding depth of fusion continuously welded is less than described interrupted
The welding depth of fusion of welding.
5. valve as described in claim 1, which is characterized in that described to be intermittently welded as spot welding.
6. valve as described in claim 1, which is characterized in that the axial direction of first weld seam (3) and second weld seam (4)
Spacing is 0.2~1.5mm.
7. valve as described in claim 1, which is characterized in that when the outer diameter of the shell (2) is 15~25mm, described the
In two weld seams (4), the number of welds being intermittently welded is 8~24.
8. such as the described in any item valves of claim 1-7, which is characterized in that when the wall of the shell (2) and the valve seat (1)
When thickness is respectively less than predetermined value and difference and be in preset range, the valve seat (1) is by being intermittently welded in its radially inner side connection one
Connecting plate (5), first weld seam (3) do not radially extend to the connecting plate (5), second weld seam (4) radially by
The shell (2) extends to the connecting plate (5), to be connect by the connecting plate (5) with the valve seat (1).
9. valve as claimed in claim 8, which is characterized in that the valve seat (1) and the connecting plate (5) are in the engaging portion
The side that position is axially away from the shell (2) forms attachment weld (6), the attachment weld (6) and second weld seam (4)
It is axially symmetric about first weld seam (3).
10. such as the described in any item valves of claim 1-7, which is characterized in that the valve seat (1) and the shell (2) also have
There is at least one third weld seam made of being intermittently welded or continuously welding, in the axial direction, the third weld seam is in described
Between first weld seam (3) and second weld seam (4).
11. such as the described in any item valves of claim 1-7, which is characterized in that the shell (2) and the valve seat (1) welding
Form the electric expansion valve of refrigeration system or the valve body of solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611057796.XA CN108105445B (en) | 2016-11-25 | 2016-11-25 | A kind of valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611057796.XA CN108105445B (en) | 2016-11-25 | 2016-11-25 | A kind of valve |
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| Publication Number | Publication Date |
|---|---|
| CN108105445A CN108105445A (en) | 2018-06-01 |
| CN108105445B true CN108105445B (en) | 2019-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611057796.XA Active CN108105445B (en) | 2016-11-25 | 2016-11-25 | A kind of valve |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191201611A (en) * | 1912-01-20 | 1913-02-20 | Harold John Davies | Improvements in the Manufacture of Double Helical Metallic Tubing. |
| CN2654971Y (en) * | 2003-10-01 | 2004-11-10 | 浙江三花股份有限公司 | Electronic expansion valve body structure |
| EP2617509B1 (en) * | 2010-09-16 | 2023-04-26 | Nippon Steel Corporation | Formed member and manufacturing method thereof |
| CN103075534A (en) * | 2012-05-21 | 2013-05-01 | 陈乃昶 | Method for machining long-distance transport pipe all-welded ball valve |
| CN203784396U (en) * | 2014-04-23 | 2014-08-20 | 中国工程物理研究院化工材料研究所 | Multi-welding-seam structure for improving energy storage welding encapsulation performance of blast valve igniter |
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2016
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Effective date of registration: 20231107 Address after: 312500 Daming new area, Zhejiang Xinchang Economic Development Zone, Xinchang County, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Sanhua Commercial Refrigeration Co.,Ltd. Address before: 312500 xialiquan village, Qixing street, Xinchang County, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. |
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