CN117847279A - Switching valve and manufacturing method thereof - Google Patents
Switching valve and manufacturing method thereof Download PDFInfo
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- CN117847279A CN117847279A CN202211208351.2A CN202211208351A CN117847279A CN 117847279 A CN117847279 A CN 117847279A CN 202211208351 A CN202211208351 A CN 202211208351A CN 117847279 A CN117847279 A CN 117847279A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 238000003466 welding Methods 0.000 claims abstract description 97
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000003780 insertion Methods 0.000 claims description 43
- 230000037431 insertion Effects 0.000 claims description 43
- 229910000679 solder Inorganic materials 0.000 claims description 35
- 238000010438 heat treatment Methods 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 238000005476 soldering Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 abstract description 3
- 238000005057 refrigeration Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000005219 brazing Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve Housings (AREA)
Abstract
The invention belongs to the technical field of refrigeration equipment, and particularly relates to a switching valve and a manufacturing method thereof, wherein the switching valve comprises a valve body; the cylinder wall of the valve body is provided with a notch, and the valve body is internally provided with a valve cavity; a valve seat; the valve seat is positioned in the valve cavity, the upper surface of the valve seat is a plane, the lower surface of the valve seat comprises a welding part matched with the shape of the notch of the valve body, the inner edge of the welding part is positioned at the notch, and the outer edge of the welding part is positioned in the valve body; the welding part is welded with the wall of the valve body cylinder at the edge of the notch in a closed loop manner; a first connection pipe; the size of the incision is larger than the outer diameter of the first connecting pipe; the valve seat is provided with a first valve seat hole; the first connecting pipe is inserted into the first valve seat hole after penetrating through the incision and welded with the valve seat. The first connecting pipe is not required to be welded with the valve body, only needs to be welded with the valve seat, and the whole manufacturing method is simple. According to the invention, the notch with larger size is arranged, so that on one hand, the attaching area between the valve body and the valve seat is reduced, and the outflow of refrigerant caused by poor welding between the valve body and the valve seat is avoided; the first connecting pipe is convenient to assemble.
Description
Technical Field
The invention belongs to the technical field of refrigeration equipment, and particularly relates to a switching valve and a manufacturing method thereof.
Background
In an air conditioning system, a switching valve is adopted to realize the switching function of refrigerating and heating.
The structure of the existing switching valve is shown in fig. 1, and the existing switching valve comprises a valve body 01, a valve seat 02 and a connecting pipe 03, wherein the valve body 01 is provided with a valve body hole, the valve seat 02 is provided with valve seat holes, the valve body holes are equal in size with the valve seat holes and correspond to the valve seat holes one by one, and the connecting pipe 03 penetrates through the valve body holes and then is arranged in the valve seat holes of the valve seat 02. When in manufacture, firstly, the welding ring is put into the valve seat hole; after aligning the valve body holes with the valve seat holes one by one, assembling the connecting pipes 03 to the valve seat holes through the valve body holes and enabling the connecting pipes 03 to prop against the welding ring; then the welding ring is heated and melted, the melted solder fills the gap between the connecting pipe 03 and the valve seat 02 through capillary action, and simultaneously can fill the gap between the valve seat 02 and the valve body 01, and the solder simultaneously flows into the gap between the valve body 01 and the connecting pipe 03 so as to connect the connecting pipe 03 and the valve body 01.
However, during welding, the following phenomena often occur in the switching valve:
(1) The space between adjacent valve body holes is unequal to the space between adjacent valve seat holes, so that the connecting pipe 03 is difficult to install;
(2) The contact area between the arc surface of the valve body 01 and the arc surface of the valve seat 02 is large, the solder can not ensure to fill gaps between all the valve seats 02 and the valve body 01, and the refrigerant flows out of the valve body 01 from the gaps without solder; particularly, when the valve body 01 or the valve seat 02 is deformed due to processing, the distance between the arc surface of the valve body 01 and the arc surface of the valve seat 02 becomes large, and effective welding cannot be performed through welding flux;
(3) A part of melted solder flows into the upper surface of the valve seat 02, increasing the polishing process of the upper surface of the valve seat 02.
Disclosure of Invention
The invention aims to solve the technical problems and provides a switching valve and a manufacturing method thereof.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a switching valve includes a valve body; the cylinder wall of the valve body is provided with a notch, and the valve body is internally provided with a valve cavity; a valve seat; the valve seat is positioned in the valve cavity, the upper surface of the valve seat is a plane, the lower surface of the valve seat comprises a welding part matched with the shape of the notch of the valve body, the inner edge of the welding part is positioned at the notch, and the outer edge of the welding part is positioned in the valve body; the welding part is welded with the wall of the valve body cylinder at the edge of the notch in a closed loop manner; a first connection pipe; the size of the incision is larger than the outer diameter of the first connecting pipe; the valve seat is provided with a first valve seat hole; the first connecting pipe is inserted into the first valve seat hole after penetrating through the incision and welded with the valve seat.
Further, a flow limiting structure is arranged in the first valve seat hole and used for preventing solder between the first connecting pipe and the valve seat from flowing into the upper surface of the valve seat.
Further, the first valve seat hole comprises a first hole section and a second hole section, and the inner diameter of the first hole section is larger than that of the second hole section; the first adapter tube comprises an insertion section positioned in the first hole section; a limiting surface for blocking the end part of the insertion section is arranged between the first hole section and the second hole section; the current limiting structure is a groove arranged on the inner wall of the first hole section, and a welding ring accommodating cavity is formed between the groove and the outer wall of the insertion section.
Further, the first valve seat hole comprises a first hole section and a second hole section, and the inner diameter of the first hole section is larger than that of the second hole section; the first adapter tube comprises an insertion section positioned in the first hole section; a limiting surface for blocking the end part of the insertion section is arranged between the first hole section and the second hole section; the current limiting structure is a groove arranged on the limiting surface, and a welding ring accommodating cavity is formed between the groove and the end part of the insertion section.
Further, the first valve seat hole comprises a first hole section and a second hole section, and the inner diameter of the first hole section is larger than that of the second hole section; the first adapter tube comprises an insertion section positioned in the first hole section; a limiting surface for blocking the end part of the insertion section is arranged between the first hole section and the second hole section; a welding ring accommodating cavity is formed between the limiting surface and the end part of the insertion section; the flow restricting structure is an inner wall of the second bore Duan Jieti.
Further, the welding part is bonded and welded with the wall of the valve body at the edge of the notch.
Further, the shape of the notch is a quadrangle, and the quadrangle is provided with two first sides and two second sides; the two first sides are relatively parallel and extend along the axial direction of the valve body, and the two first sides are connected through the arc-shaped second side.
Further, the section of the valve seat along the length direction is D-shaped, the arc length of the starting edge, where the D-shaped cambered surface is attached, of the valve body is L1, and the projection length value D1 of the L1 at the axial section of the first connecting pipe is larger than 1mm; the shortest straight line distance between the end part of the D-shaped cambered surface and the second edge is L2, and the length value of the L2 is more than 1mm.
The invention also provides a manufacturing method of the switching valve, which comprises the following steps:
s1: preparing a valve body and a first connecting pipe, and processing a notch with the inner diameter larger than the outer diameter of the first connecting pipe on the wall of the valve body;
s2: preparing a valve seat, mounting the valve seat into the valve body, and positioning the notch on the lower surface of the valve body; the welding part is a welding area of the valve seat and the valve body; the inner edge of the welding part is positioned at the notch, and the outer edge is positioned in the valve body;
s3: the welding part is welded with the wall of the valve body cylinder at the edge of the notch in a closed loop mode;
s4: after solder is placed in a first valve seat hole of a valve seat, an insertion section of a first connecting pipe is inserted into the first valve seat hole after being cut, so as to form a pre-welding assembly;
s5: and heating the pre-welding assembly, and melting the solder after heating, wherein the solder is filled between the inner wall of the first valve seat hole and the outer wall of the first connecting pipe.
Further, the step S3 includes,
s31: selecting a plurality of welding points at the edge of the notch, and pre-fixing the arc surface of the valve seat and the valve body positioned at the edge of the notch at the welding points by adopting laser;
s32: carrying out full-circle laser welding on the outer edge of the arc surface of the valve seat and the valve body positioned at the edge of the notch; or filling solder paste between the outer edge of the circular arc surface of the valve seat and the valve body positioned at the edge of the notch.
Compared with the prior art, the invention has the beneficial technical effects that:
according to the invention, compared with the first connecting pipe, the notch with larger size is arranged on the wall of the valve body, so that the joint area between the valve body and the valve seat is reduced, the welding part between the valve body at the edge of the notch and the valve seat at the edge of the notch is only required to be firmly welded when the valve body is welded with the valve seat, even if the valve seat or the valve body is deformed, the welding between the valve body and the valve seat is not influenced, the notch is arranged on the surface of the valve seat in an open mode, the valve seat and the valve body can be directly welded in a closed-loop mode through the notch, the operation is convenient during welding, the welding time is greatly shortened, and the outflow of refrigerant is avoided; the first connecting pipe can be assembled independently, only the matching with a valve seat hole of the valve seat is needed to be considered for assembly, and the first connecting pipe is simple to assemble;
in addition, the arrangement of the flow limiting structure can prevent solder from flowing to the upper surface of the valve seat in the welding process of the connecting pipe and the valve seat; therefore, the notch and the flow limiting structure are matched with each other, so that the whole welding process is more efficient, and meanwhile, the notch enables the connecting pipe to be assembled more simply.
Drawings
FIG. 1 is a block diagram of a prior art switching valve;
FIG. 2 is a block diagram of the switch valve as a whole;
FIG. 3 is a side view of a switch valve;
FIG. 4 is a block diagram of a valve body;
FIG. 5 is an assembled view of a valve body and a valve seat;
FIG. 6 is a top view of the valve body and valve seat assembly;
FIG. 7 is a schematic illustration of the length of the valve body attached to the valve seat;
FIG. 8 is a flow limiting block diagram;
FIG. 9 is another flow restricting block diagram;
fig. 10 is a block diagram of another flow restricting structure.
In the figure, a valve body 01, a valve seat 02, a connecting pipe 03, a valve body 1, a notch 11, a first side 111, a second side 112, a valve seat 2, a first hole section 21, a second hole section 22, a groove 23, a first connecting pipe 3, a plug-in section 31, a second connecting pipe 4, a third connecting pipe 5, a fourth connecting pipe 6 and a welding ring 7 are arranged.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.
Example 1
As shown in fig. 2 to 6, the present embodiment provides a switching valve including a valve body 1, a valve seat 2, and a first adapter tube 3. The cylinder wall of the valve body 1 is provided with a notch 11, and the valve body 1 is internally provided with a valve cavity. The valve seat 2 is positioned in the valve cavity, the upper surface of the valve seat 2 is a plane, and the lower surface of the valve seat 2 comprises a welding part matched with the shape of the notch 11 of the valve body 1. The inner edge of the welding part is positioned at the notch, and the outer edge is positioned in the valve body 1. The welding part is welded with the wall of the valve body 1 at the edge of the notch 11 in a closed loop mode. The size of the cut-out 11 is larger than the outer diameter of the first adapter tube 3. The valve seat 2 is provided with a first valve seat hole; the first connecting pipe 3 penetrates through the notch 11 and then is inserted into the first valve seat hole to be welded with the valve seat 2. The size of the notch 11 of the present embodiment is at least larger than the outer diameter of the first connecting tube 3, so that the area of the wall of the valve body 1 can be reduced. When the valve body 1 is welded with the valve seat 2, the welding part of the valve seat 2 is firmly welded with the wall of the valve body 1 positioned at the edge of the notch 11. Even if the valve seat 2 or the valve body 1 is deformed, the welding between the valve body and the valve seat is easier from the notch, so that the welding firmness between the valve body 1 and the valve seat 2 is not affected, and the risk of broken welding between the valve seat 2 and the valve body 1 is reduced. The welding area between the valve body 1 and the valve seat 2 is a closed loop type, and the notch 11 is arranged on the surface of the valve body 1 in an open mode. Therefore, when the valve seat 2 and the valve body 1 are welded, the closed-loop welding can be directly performed on the welding part of the valve seat 2 and the valve body at the edge of the notch 11 through the notch 11, the operation is convenient during welding, and the welding time is greatly shortened.
A flow limiting structure is arranged in the first valve seat hole and is used for preventing solder between the first connecting pipe 3 and the valve seat 2 from flowing into the upper surface of the valve seat 2. The valve seat 2 is formed by processing a metal material, and a slider (not shown in the figure) can reciprocally slide on the upper surface of the valve seat 2 to control the reversing between the first connection pipe 3 and the other connection pipes of the switching valve.
The outer wall of the first connecting pipe 3 is not contacted with the notch edge, a certain distance is provided, welding between the first connecting pipe 3 and the valve body 1 is not needed to be considered, when the first connecting pipe 3 is installed, only the first connecting pipe 3 and the first valve seat hole are needed to be matched with each other, and the first connecting pipe 3 is simple to install. In addition, in order to prevent solder from flowing into the upper surface of the valve seat 2 when the valve seat 2 is welded to the valve body 1, the present embodiment provides a flow restricting structure in the first valve seat hole. Therefore, the notch 11 is matched with the flow limiting structure, a poor welding area is not easy to exist between the valve seat 2 and the valve body 1, and no solder exists on the upper surface of the valve seat 2, so that the whole welding process of the switching valve is more efficient.
As shown in fig. 6 and 8, the first valve seat hole of the present embodiment includes a first hole section 21 and a second hole section 22, and the first hole section 21 has an inner diameter larger than the second hole section 22. The first adapter tube 3 comprises an insertion section 31 located in the first bore section 21. A limiting surface for blocking the end of the insertion section 31 is provided between the first hole section 21 and the second hole section 22. The limiting surface is a stepped surface between the first hole section 21 and the second hole section 22. The flow limiting structure is a groove 23 arranged on the inner wall of the first hole section 21, and a welding ring accommodating cavity is formed between the groove 23 and the outer wall of the insertion section 31. The first hole section 21 and the second hole section 22 are straight hole sections. The solder is a solder ring 7. Before welding, the welding ring 7 is placed in the groove 23, and then the insertion section 31 of the first connecting pipe 3 is inserted into the first hole section 21, so that the outer wall of the insertion section 31 is tightly matched with the inner wall of the first hole section 21, and the end part of the insertion section 31 is abutted against the step surface. The welding ring 7 moves downwards by capillary action after being melted by a heating mode such as brazing in a furnace, and fills the gap between the first connecting pipe 3 and the valve seat 2. Since the end of the insertion section 31 abuts against the stepped surface, the solder flowing through the valve has a certain resistance, and the solder cannot move upward to the upper surface of the valve seat 2.
As shown in fig. 9, the current limiting structure of the present embodiment may also be a groove 23 provided at the step surface, and a welding ring accommodating cavity is formed between the groove 23 and the end of the insertion section 31. Before welding, the welding ring 7 is placed between the step surface and the end part of the insertion section 31, and then the insertion section 31 of the first connecting pipe 3 is inserted into the first hole section 21, so that the outer wall of the insertion section 31 is tightly matched with the inner wall of the first hole section 21, and the end part of the insertion section 31 is abutted against the welding ring 7. The welding ring 7 moves downwards by capillary action after being melted by a heating mode such as brazing in a furnace, and fills the gap between the first connecting pipe 3 and the valve seat 2. Due to the presence of the recess 23 at the stepped surface, a portion of the solder is contained, preventing the solder from moving up to the upper surface of the valve seat 2.
As shown in fig. 10, the flow restricting structure of the present embodiment may also be a stepped inner wall of the second hole section 22. Before welding, the welding ring 7 is placed between the step surface and the end of the insertion section 31, and then the insertion section 31 of the first connecting pipe 3 is inserted into the first hole section 21, so that the outer wall of the insertion section 31 is tightly matched with the inner wall of the first hole section 21, and the end of the insertion section 31 is abutted against the welding ring 7. The welding ring 7 moves downwards by capillary action after being melted by a heating mode such as brazing in a furnace, and fills the gap between the first connecting pipe 3 and the valve seat 2. The presence of the stepped inner wall of the second hole section 22 can increase the solder flow length, and prevent the solder from moving upward to the upper surface of the valve seat 2.
The first valve seat hole of this embodiment further includes a first valve port section disposed at the upper end of the valve seat 2, that is, near the upper surface of the valve seat 2, and the valve cavity may be sequentially communicated with the first adapter tube 3 disposed in the first hole section 21 through the first valve port section and the second hole section 22.
In order to ensure the welding firmness, the welding part of the embodiment is bonded and welded with the wall of the valve body 1 at the edge of the notch 11. As shown in fig. 4, the shape of the notch 11 in the present embodiment is a quadrilateral, which has two first sides 111 and two second sides 112; the two first sides 111 are relatively parallel and extend along the axial direction of the valve body 1, and the two first sides 111 are connected by an arc-shaped second side 112. The first side 111 and the second side 112 can be smoothly transitioned by an arc-shaped chamfer. In order to verify the optimal shape of the slit 11, in this embodiment, the slit 11 is set to a plurality of different shapes, and after continuous testing and verification of the slits with different shapes and calculation and derivation of stress analysis of the valve body 1 provided with the slits with different shapes, only the slit is set to the shape shown in fig. 4, so that not only the laser cutter can smoothly cut, but also the structural deformation of the valve body 1 can be minimized.
As shown in fig. 3 and 7, the cross section of the valve seat 2 along the length direction is D-shaped, the arc length of the starting edge, where the D-shaped arc surface is attached to the valve body 1, from the first edge 111 is L1, so as to ensure the welding strength between the valve body 1 and the valve seat 2, and the projection length value D1 of the L1 at the axial cross section of the first connecting tube 3 is greater than 1mm. The shortest straight line distance between the end of the D-shaped cambered surface and the second edge 112 is L2, and the length value of L2 is more than 1mm in order to ensure the welding length between the valve body 1 and the valve seat 2.
The switching valve of the embodiment further comprises a second connecting pipe 4 and a third connecting pipe 5, wherein the valve seat 2 is respectively provided with a second valve seat hole connected with the second connecting pipe 4 and a third valve seat hole connected with the third connecting pipe 5, and the structures of the second valve seat hole and the third valve seat hole are the same as those of the first valve seat hole. In this embodiment, the number of the cutouts 11 is one, and the first connecting pipe 3, the second connecting pipe 4 and the third connecting pipe 5 are arranged at intervals in the cutouts 11 and are connected with the valve seat 2 after penetrating through the cutouts 11. The valve seat 2, the valve body 1, the first connecting pipe 3, the second connecting pipe 4 and the third connecting pipe 5 are all made of stainless steel. The embodiment also comprises a fourth connecting pipe 6, and the fourth connecting pipe 6 is arranged on a connecting pipe hole section of the wall of the valve body 1.
Example two
The embodiment provides a manufacturing method of a switching valve, which comprises the following steps:
s1: preparing a valve body 1 and a first connecting pipe 3, and machining a notch with the inner diameter larger than the outer diameter of the first connecting pipe 3 on the wall of the valve body 1;
s2: preparing a valve seat 2; mounting the valve seat 2 into the valve body 1, wherein the notch 11 is positioned on the lower surface of the valve body 1; the welding part is the welding area of the valve seat 2 and the valve body 1; the inner edge of the welding part is positioned at the notch 11, and the outer edge is positioned in the valve body 1;
s3: the welding part is welded with the wall of the valve body 1 at the edge of the notch 11 in a closed-loop manner;
s4: after solder is placed in a first valve seat hole of the valve seat 2, an insertion section 31 of the first connecting pipe 3 is inserted into the first valve seat hole after passing through the notch 11 to form a pre-welding assembly;
s5: the pre-welded assembly is heated, the solder melts after heating, and the solder fills between the inner wall of the first valve seat hole and the outer wall of the first connecting pipe 3.
Step S1 further comprises preparing a second adapter 4, a third adapter 5 and a fourth adapter 6; a small hole is machined in the valve body 1 in advance, and a connecting pipe hole section connected with the fourth connecting pipe 6 is machined in the wall of the valve body 1 after the punching pipe is provided with the small hole; a cut 11 is then made which covers the small hole area.
According to the invention, the outer wall of the first connecting pipe 3 is not contacted with the notch edge, the first connecting pipe 3 is only required to be installed with the valve seat 2, and the installation process is simple. There is no welding failure region between the valve seat 2 and the valve body 1. The invention can avoid deformation of the structure of the valve body 1 when the notch is directly formed by opening the pipe hole section through the small hole in advance, thereby avoiding the influence of the deformation of the structure of the valve body 1 on the set position of the fourth connecting pipe 6.
The step S2 includes the steps of,
s21: machining a first valve seat hole on the valve seat 2; the first valve seat bore comprises a first bore section 21 and a second bore section 22, the first bore section 21 having an inner diameter greater than the second bore section 22; the first adapter tube 3 comprises an insertion section 31 located within the first bore section 21; a limiting surface for blocking the end of the insertion section 31 is arranged between the first hole section 21 and the second hole section 22;
the limiting surface is a stepped surface between the first hole section 21 and the second hole section 22.
S22: providing the inner wall of the first hole section 21 with a groove 23, and placing the welding ring 7 between the groove 23 and the outer wall of the insertion section 31; or the step surface is provided with a groove 23, and the welding ring 7 is placed between the groove 23 and the end part of the insertion section 31; or the inner wall of the second bore section 22 may be machined to have a stepped shape.
Step S2 further includes machining the valve seat 2 to form a second valve seat hole and a third valve seat hole having the same structure as the first valve seat hole. The inner wall of the first hole section 21 is processed into a groove 23, or the stepped surface is processed into the groove 23 or the second hole section 22 is processed into the inner wall with the stepped shape, so that the solder flowing can be blocked to a certain extent, and the solder cannot move upwards to the upper surface of the valve seat 2. The upper surface of the valve seat 2 is free of solder.
The step S3 includes the steps of,
s31: selecting a plurality of welding points at the edge of the notch, and pre-fixing the arc surface of the valve seat 2 and the valve body 1 positioned at the edge of the notch at the welding points by adopting laser;
s32: carrying out full-circle laser welding on the outer edge of the arc surface of the valve seat 2 and the valve body 1 positioned at the edge of the notch 11; or the outer edge of the circular arc surface of the valve seat 2 and the valve body 1 at the edge of the slit 11 are filled with solder paste.
Step S3 further comprises the step of pre-tightening the valve body 1 and the valve seat 2 by adopting tooling equipment, and then pre-fixing the valve body 1 and the valve seat 2 by laser spot welding, so that the influence of overlarge gap between the valve body and the valve seat 2 on the laser spot welding is avoided.
Step S4 further includes, after placing the solder in the second valve seat hole of the valve seat 2, inserting the insertion section 31 of the second adapter tube 4 into the second valve seat hole after cutting; after the solder is placed in the third valve seat hole of the valve seat 2, the insertion section 31 of the third adapter tube 5 is inserted into the third valve seat hole after being cut.
The valve body 1 filled with the soldering paste, the valve seat 2 and the assembled switching valve are integrally placed in a soldering furnace for soldering.
While the embodiments of the present invention have been described in detail, those skilled in the art will appreciate that many modifications are possible in the specific embodiments, and that such modifications are intended to be within the scope of the present invention.
Claims (10)
1. A switching valve, characterized in that: comprising the steps of (a) a step of,
a valve body (1); the cylinder wall of the valve body (1) is provided with a notch (11), and a valve cavity is arranged in the valve body (1);
a valve seat (2); the valve seat (2) is positioned in the valve cavity, the upper surface of the valve seat (2) is a plane, the lower surface of the valve seat (2) comprises a welding part matched with the shape of the notch (11) of the valve body (1), the inner edge of the welding part is positioned at the notch, and the outer edge of the welding part is positioned in the valve body (1); the welding part is welded with the cylinder wall of the valve body (1) at the edge of the notch (11) in a closed-loop manner;
a first connection tube (3); the size of the notch (11) is larger than the outer diameter of the first connecting pipe (3); the valve seat (2) is provided with a first valve seat hole; the first connecting pipe (3) is inserted into the first valve seat hole after penetrating through the notch (11) and is welded with the valve seat (2).
2. The switching valve according to claim 1, wherein:
a flow limiting structure is arranged in the first valve seat hole and is used for preventing solder between the first connecting pipe (3) and the valve seat (2) from flowing into the upper surface of the valve seat (2).
3. The switching valve according to claim 2, wherein: the first valve seat hole comprises a first hole section (21) and a second hole section (22), and the inner diameter of the first hole section (21) is larger than that of the second hole section (22); the first connection tube (3) comprises an insertion section (31) located in the first bore section (21); a limiting surface for blocking the end part of the insertion section (31) is arranged between the first hole section (21) and the second hole section (22); the flow limiting structure is a groove (23) arranged on the inner wall of the first hole section (21), and a welding ring accommodating cavity is formed between the groove (23) and the outer wall of the insertion section (31).
4. The switching valve according to claim 2, wherein: the first valve seat hole comprises a first hole section (21) and a second hole section (22), and the inner diameter of the first hole section (21) is larger than that of the second hole section (22); the first connection tube (3) comprises an insertion section (31) located in the first bore section (21); a limiting surface for blocking the end part of the insertion section (31) is arranged between the first hole section (21) and the second hole section (22); the current limiting structure is a groove (23) arranged on the limiting surface, and a welding ring accommodating cavity is formed between the groove (23) and the end part of the insertion section (31).
5. The switching valve according to claim 2, wherein: the first valve seat hole comprises a first hole section (21) and a second hole section (22), and the inner diameter of the first hole section (21) is larger than that of the second hole section (22); the first connection tube (3) comprises an insertion section (31) located in the first bore section (21); a limiting surface for blocking the end part of the insertion section (31) is arranged between the first hole section (21) and the second hole section (22); a welding ring accommodating cavity is formed between the limiting surface and the end part of the insertion section (31); the flow limiting structure is a stepped inner wall of the second bore section (22).
6. The switching valve according to claim 1, wherein: the welding part is bonded and welded with the wall of the valve body (1) at the edge of the notch (11).
7. The switching valve according to claim 6, wherein: the shape of the notch (11) is a quadrangle, and the quadrangle is provided with two first sides (111) and two second sides (112); the two first sides (111) are relatively parallel and extend along the axial direction of the valve body (1), and the two first sides (111) are connected through the arc-shaped second side (112).
8. The switching valve according to claim 7, wherein: the section of the valve seat (2) along the length direction is D-shaped, the arc length of the starting edge, where the D-shaped cambered surface is attached, of the valve body (1) is L1, and the projection length value D1 of the L1 at the axial section of the first connecting pipe (3) is larger than 1mm; the shortest straight line distance between the end part of the D-shaped cambered surface and the second edge (112) is L2, and the length value of L2 is more than 1mm.
9. A manufacturing method of a switching valve is characterized in that: the method comprises the following steps:
s1: preparing a valve body (1) and a first connecting pipe (3), and processing a notch (11) with the inner diameter larger than the outer diameter of the first connecting pipe (3) on the wall of the valve body (1);
s2: preparing a valve seat (2), mounting the valve seat (2) into the valve body (1), and positioning a notch (11) on the lower surface of the valve body (1); the welding area of the valve seat (2) and the valve body (1) is a welding part; the inner edge of the welding part is positioned at the notch (11), and the outer edge is positioned in the valve body (1);
s3: the welding part is welded with the cylinder wall of the valve body (1) at the edge of the notch (11) in a closed-loop manner;
s4: after solder is placed in a first valve seat hole of a valve seat (2), an insertion section (31) of a first connecting pipe (3) is inserted into the first valve seat hole after passing through a notch (11) to form a pre-welding assembly;
s5: and heating the pre-welding assembly, and melting the solder after heating, wherein the solder is filled between the inner wall of the first valve seat hole and the outer wall of the first connecting pipe (3).
10. The method of manufacturing a switching valve according to claim 9, wherein: the step S3 includes the steps of,
s31: selecting a plurality of welding points at the edge of the notch (11), and pre-fixing the arc surface of the valve seat (2) and the valve body (1) positioned at the edge of the notch (11) at the welding points by adopting laser;
s32: carrying out full-circle laser welding on the outer edge of the arc surface of the valve seat (2) and the valve body (1) positioned at the edge of the notch (11); or filling soldering paste between the outer edge of the arc surface of the valve seat (2) and the valve body (1) positioned at the edge of the notch (11).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211208351.2A CN117847279A (en) | 2022-09-30 | 2022-09-30 | Switching valve and manufacturing method thereof |
| PCT/CN2023/120253 WO2024067325A1 (en) | 2022-09-30 | 2023-09-21 | Switching valve and manufacturing method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211208351.2A CN117847279A (en) | 2022-09-30 | 2022-09-30 | Switching valve and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117847279A true CN117847279A (en) | 2024-04-09 |
Family
ID=90476118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211208351.2A Pending CN117847279A (en) | 2022-09-30 | 2022-09-30 | Switching valve and manufacturing method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN117847279A (en) |
| WO (1) | WO2024067325A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3084390B2 (en) * | 1992-12-18 | 2000-09-04 | 太平洋工業株式会社 | Four-way switching valve |
| CN202032124U (en) * | 2011-04-05 | 2011-11-09 | 浙江三花制冷集团有限公司 | Four-way reversing main valve and four-way reversing valve adopting same |
| CN202065526U (en) * | 2011-05-16 | 2011-12-07 | 浙江盾安禾田金属有限公司 | Main valve of stainless steel four-way reversing valve |
| CN102269281B (en) * | 2011-06-28 | 2012-12-26 | 浙江盾安禾田金属有限公司 | Four-way reversing valve for heat pump air-conditioner |
| CN216200844U (en) * | 2021-09-28 | 2022-04-05 | 珠海华宇金属有限公司 | Four-way valve |
| CN218582371U (en) * | 2022-09-30 | 2023-03-07 | 浙江盾安禾田金属有限公司 | Switching valve |
-
2022
- 2022-09-30 CN CN202211208351.2A patent/CN117847279A/en active Pending
-
2023
- 2023-09-21 WO PCT/CN2023/120253 patent/WO2024067325A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024067325A1 (en) | 2024-04-04 |
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