CN108571604B - One-way control valve and manufacturing method thereof - Google Patents
One-way control valve and manufacturing method thereof Download PDFInfo
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- CN108571604B CN108571604B CN201710139706.XA CN201710139706A CN108571604B CN 108571604 B CN108571604 B CN 108571604B CN 201710139706 A CN201710139706 A CN 201710139706A CN 108571604 B CN108571604 B CN 108571604B
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- valve body
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- connecting pipe
- connector
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K13/00—Welding by high-frequency current heating
- B23K13/01—Welding by high-frequency current heating by induction heating
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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
- F16K27/0209—Check valves or pivoted valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
- Valve Housings (AREA)
Abstract
The invention belongs to the technical field of flow path system control, and particularly relates to a one-way control valve and a manufacturing method thereof, wherein the one-way control valve comprises a valve body (1) and a connector (2) which are fixedly connected by welding, an inlet connecting pipe (4) which is fixedly connected with the valve body (1) by welding, an outlet connecting pipe (5) which is fixedly connected with the connector (2) by welding, a valve core seat part (3) which is arranged in the inner cavity of the valve body (1), and a valve core part (6) which is abutted against the valve core seat part (3) by an elastic part (7), wherein the valve body (1), the connector (2) and the outlet connecting pipe (5) are fixedly connected by welding in one step in a high-frequency welding way, on one hand, the hidden danger that the welding quality is poor due to the influence of secondary welding on a welding area can be solved, and simultaneously, the pickling process required after, the reliability of the product is improved.
Description
Technical Field
The invention belongs to the technical field of flow path system control, and particularly relates to a one-way control valve and a manufacturing method thereof.
Background
The use of one-way control valves is common in flow control systems, and a prior art single-stage control valve configuration is shown in fig. 1. The check valve includes a cylindrical valve body 1 'and a joint 2'. The inlet connecting pipe 4 'is welded on one side of the valve body 1'; the outlet connection 5 'is welded to one side of the connection 2'. The valve core seat component 3 'is fixed in the inner cavity of the valve body 1', the valve core component 6 'is sleeved on the valve core seat component 3' by adopting a piston type structure, and the joint 2 'extends into the valve body 1' and is welded and fixed.
In the one-way control valve structure in the prior art, because necessary parts are required to be installed in the valve body, the inlet connecting pipes 4 'are required to be welded to the valve body 1' respectively to form a first assembly part; the outlet connection 5 'is welded to the connector 2' to form a second assembly. After the inner parts (such as the valve core seat part 3 ', the valve core part 6' and the like) are installed, the first assembly part and the second assembly part are welded to form the one-way control valve.
The disadvantages of this product structure are: when the first assembly and the second assembly are welded, the area (between the outlet connecting pipe 5 'and the joint 2') which is welded for the first time is affected by secondary heat, so that the welding hidden danger exists, and the welding quality is difficult to guarantee. Furthermore, the first assembly and the second assembly need to be subjected to an acid pickling surface treatment to remove the solder oxides before the second soldering is performed, so that the process flow is long and complicated, and the reliability of the product is reduced.
Therefore, how to improve the structure and manufacture of the one-way control valve, simplify the process and improve the reliability thereof is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The present invention is directed to provide a check valve and a method of manufacturing the same that can optimize a product process and improve reliability thereof.
The invention discloses a one-way control valve which comprises a valve body and a joint which are fixedly connected through welding, an inlet connecting pipe fixedly connected with the valve body through welding, an outlet connecting pipe fixedly connected with the joint through welding, a valve core seat part arranged in an inner cavity of the valve body, and a valve core part abutted against the valve core seat part through an elastic part, wherein the valve body is provided with a valve port, and the valve body, the joint and the outlet connecting pipe are fixedly connected through welding in a high-frequency welding mode at one time.
According to the one-way control valve provided by the invention, through improving the process and adopting the one-time high-frequency welding process of the valve body, the connector and the outlet connecting pipe, on one hand, the hidden danger of welding quality caused by the influence of secondary welding on a welding area can be solved, and meanwhile, the process that the connector and the outlet connecting pipe need to be subjected to acid pickling after flame brazing in the original process is also omitted, so that the reliability of the product is improved.
On the basis of the technical scheme, as a further scheme, if the axial distance from the outer edge end part of the valve body on the outlet connecting pipe side to the outer edge end part of the connector on the outlet connecting pipe side is defined as H, H is more than or equal to 3mm and less than or equal to 25 mm;
further, the valve core seat component comprises a valve core seat and a fixed seat, the fixed seat is fixed between the valve body and the joint, one end of the valve body, which is in welded fit with the joint, is provided with a necking part, and one end of the joint, which is in welded fit with the valve body, is provided with a conical surface part;
further, the end surface of the necking part is provided with a chamfer facing the joint;
furthermore, one end of the valve body, which is in welded fit with the joint, is provided with a step part, the necking part is arranged on the outer circular surface of the step part, and the fixed seat is fixed at the bottom of the step part;
furthermore, welding materials are filled between the necking part and the conical surface part, and the included angle between the necking part and the conical surface part is 5-15 degrees;
according to the further technical scheme provided by the invention, the quality of the one-time high-frequency welding process is more reliable by optimizing the size of the part in the welding area; meanwhile, in an optimal scheme, the valve body is provided with the necking part, so that the problem that welding becomes loose due to the fact that the valve core part impacts welding materials in the welding area of the valve body and the joint backwards due to overlarge pressure impact of the fluid inlet is avoided, and potential quality hazards are eliminated.
Meanwhile, the invention also discloses a manufacturing method of the one-way control valve, which comprises the following steps:
a10: respectively preparing a valve body, a connector, an inlet connecting pipe and an outlet connecting pipe;
a20: welding the valve body and the inlet connecting pipe to form a valve body assembly;
a30: the valve core seat component, the valve core component and the elastic component are arranged in an inner cavity of the valve body component;
a40: assembling the fitting, the outlet nipple, and the valve body assembly into an assembly of a one-way control valve;
a50: and placing the assembly into a high-frequency welding device to be welded at one time to form the one-way control valve.
According to the manufacturing scheme of the one-way control valve, the brazing of the valve seat and the outlet connecting pipe is cancelled through the improved process, and the one-time high-frequency welding process of the valve body, the connector and the outlet connecting pipe is adopted, so that the hidden welding quality trouble caused by the influence of secondary welding on a welding area can be solved, the process of acid pickling after flame brazing of the connector and the outlet connecting pipe in the original process is also omitted, and the reliability of the product is improved.
As a further extension of the above manufacturing scheme, the high-frequency welding device includes a first high-frequency welding coil ring and a second high-frequency welding coil ring that are axially spaced apart, the first high-frequency welding coil ring corresponding to a welding position between the connector and the outlet connection pipe; the second high-frequency welding coil ring corresponds to a welding position between the connector and the valve body.
Drawings
FIG. 1 is a schematic view of a typical prior art one-way control valve;
FIG. 2 is a schematic view of a one-way control valve of a specific structure provided by the present invention;
FIG. 3 is an enlarged schematic view of a partial structure of the check valve of FIG. 2;
FIG. 4 is a partially enlarged schematic view of the weld area between the valve body and the joint of the check valve of FIG. 2;
FIG. 5 is a schematic diagram of a high-frequency welding device for the one-way control valve provided by the invention.
In FIGS. 2-5:
1-a valve body;
11-a throat, 12-a step;
13-chamfer and 14-inner cavity;
2-a linker;
21-a conical surface part;
3-a spool seat member;
31-valve core seat, 32-fixing plate;
4-inlet connection pipe;
5-outlet connection pipe;
6-a valve core component;
61-valve plate;
7-a return spring;
8-valve port;
9-high frequency welding equipment;
91-a first high frequency welding coil loop;
92-a second high frequency welding coil loop;
100-one-way control valve.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.
It should be noted that, in the present specification, the terms of left, right, etc. are taken as the perspective of the drawings in the specification, so as to facilitate the description of the technical solution of the present invention, and should not be construed as limiting the protection structure of the unidirectional control valve of the present invention.
Fig. 2 is a schematic view of a one-way control valve with a specific structure provided by the invention, fig. 3 is an enlarged schematic view of a partial structure of the one-way control valve in fig. 2, and fig. 4 is an enlarged schematic view of a welded region of a valve body and a joint of the one-way control valve.
As shown in fig. 2, 3 and 4. The check valve includes a cylindrical valve body 1 processed by a metal material. A stepped portion 12 is also formed on the inner wall of one end of the valve body 1. One end of the joint 2 machined by the metal material is protruded into the stepped portion 12, and a throat portion 11 is formed on an outer circumferential surface of the stepped portion 12 by a throat process, and the throat portion 11 is crimped to a bottom of a tapered surface portion 21 of the joint.
A valve core seat part 3 is fixed in the inner cavity of the valve body 1. The valve core seat component 3 comprises a valve core seat 31 with a columnar structure and a fixed seat 32 fixedly connected with the valve core seat 31, the fixed seat 32 is approximately in a disc or sheet structure, and a circulation opening through which fluid can freely pass is further formed in the fixed seat 32. The fixing seat 32 is fixed at the bottom of the step part 12 of the valve body 1, and the joint 2 abuts against the fixing seat 32 to realize positioning.
A stepped hole is further integrally formed in the inner cavity of the valve body 1 to serve as the valve port 8, the valve core member 6 is sleeved on the valve core seat 31, and an elastic member 7 (specifically, a spring) is disposed between the valve core member 6 and the fixing seat 32, so that the disk-shaped valve sheet 61 of the valve core member 6 can elastically abut against the valve port 8.
The inlet connecting pipe 4 is welded at one end of the valve body 1, and the outlet connecting pipe 5 is welded at one end of the joint 2.
When fluid in the pipeline system enters the inlet end from the inlet connecting pipe 4, the fluid applies certain pressure to the valve plate 61, and when the pressure is larger than the opposite acting force applied to the valve plate 61 by the spring 7, the valve core component 6 moves rightwards to open the one-way control valve; also, when the pressure applied to the valve plate 61 by the fluid in the inlet end is smaller than the opposing force applied to the valve plate 61 by the spring 7, the spool member 6 moves leftward to close the check valve.
In this embodiment, the necking portion 11 of the valve body 1 is crimped at the bottom of the conical surface portion 21 of the joint 2, the impact force of the fluid in the pipeline system on the valve core component 6 can be transmitted to the valve body 1 through the fixing seat 32 of the valve core seat component 3, and the acting force cannot be applied to the welding material (Q) between the valve body 1 and the joint 2, so that even if high-pressure impact occurs to the fluid, the strength of welding and fixing cannot be affected, the quality hidden trouble that the welding area of the product is loosened in the use process is avoided, and the product is more reliable.
The technical scheme of the invention adopts a one-time high-frequency welding process to fix the valve body 1, the connector 2 and the outlet connecting pipe 5, and FIG. 5 is a schematic diagram of a high-frequency welding device of the one-way control valve. The method of manufacturing the check valve will be described with reference to fig. 5:
step 10: respectively preparing a valve body 1, a connector 2, an inlet connecting pipe 4 and an outlet connecting pipe 5;
step 20: welding the valve body 1 and the inlet connecting pipe 4 to form a valve body assembly;
step 30: the valve core seat component 3, the valve core component 6 and the elastic component 7 are arranged in the inner cavity of the valve body assembly, the elastic component 7 is elastically arranged between the valve core component 6 and the fixed seat 32, and the fixed seat 32 is arranged at the bottom of the step part 12 of the valve body 1;
step 40: the adapter 2 is placed in the step portion 12 of the valve body 1 and abuts against the fixed seat 32, the step portion 12 of the valve body 1 is inwardly contracted, and the contraction portion 11 is formed to be pressed against the bottom of the tapered surface portion 21 of the adapter 2. Matching the outlet connecting pipe 5 with the connector 2 to assemble the valve body 1, the connector 2 and the outlet connecting pipe 5 into a one-way control valve assembly;
step 50: solder is placed at the corresponding position of the assembly, and then placed in the high-frequency soldering apparatus 9. A first high-frequency welding coil ring 91 and a second high-frequency welding coil ring 92 are axially spaced apart on the welding apparatus 9. The position of the first high-frequency welding coil ring 91 corresponds to the solder placed in the welding area of the joint 2/outlet nozzle 5; the position of the second high-frequency welding coil ring 92 corresponds to the solder placed in the welding area of the connector 2/valve body 1, and the high-frequency current is introduced into the welding coil ring to melt the solder to complete the assembly of the one-way control valve.
The one-time welding method solves the adverse effect of secondary welding after brazing in the prior art, reduces an acid pickling process after primary flame brazing, and improves the reliability of products.
Because high-frequency welding is required to be simultaneously carried out at different positions, welding parameters are required to be consistent in order to ensure that the welding of the two areas can meet the technological requirements. Therefore, according to the characteristics of the product structure, the position arrangement of the two groups of welding coil rings is important, and the positions are reflected on the product structure and are reflected on the relative positions of the two welding areas. Therefore, as a preferred embodiment, if the axial distance from the outer edge end of the valve body 1 on the outlet connection pipe 5 side to the outer edge end of the joint 2 on the outlet connection pipe 5 side is defined as H, then H is 3mm ≦ H ≦ 25 mm. If the H value is too small, the design of a welding coil ring is difficult, and the adjustment of welding parameters is difficult; if the value of H is too large, the heating between the two weld zones will be affected.
In order to meet the quality requirements of two welding areas at the same time, as a preferred scheme, the welding gap of the valve body 1/joint 2 with a relatively large welding diameter can be optimized, specifically, the matching part of the valve body 1 is provided with a necking part 11, and the matching part of the joint 2 is provided with a conical surface part 21, so that the matching position of the valve body 1 and the joint 2 is a slope to facilitate fluid permeation. Preferably, the included angle B between the necking part 11 and the conical surface part 21 is between 5 and 15 degrees. And the valve body 1 is provided with a chamfer 13 to facilitate the flow of the solder.
The one-way control valve provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (6)
1. A one-way control valve comprises a valve body (1) and a connector (2) which are fixedly connected through welding, an inlet connecting pipe (4) which is fixedly connected with the valve body (1) through welding, an outlet connecting pipe (5) which is fixedly connected with the connector (2) through welding, a valve core seat part (3) which is arranged in an inner cavity of the valve body (1), and a valve core part (6) which is abutted against the valve core seat part (3) through an elastic part (7), wherein the valve body (1) is provided with a valve port (8), the one-way control valve is characterized in that the valve body (1), the connector (2) and the outlet connecting pipe (5) are fixedly connected through one-time welding in a high-frequency welding mode, the valve core seat part (3) comprises a valve core seat (31) and a fixed seat (32), the fixed seat (32) is fixed between the valve body (1) and the connector (2), and one end of the valve body (1) which is matched, one end of the joint (2) in welding fit with the valve body (1) is provided with a conical surface portion (21), and if the axial distance from the outer edge end portion of the valve body (1) on the outlet connecting pipe (5) side to the outer edge end portion of the joint (2) on the outlet connecting pipe (5) side is defined as H, H is larger than or equal to 3mm and smaller than or equal to 25 mm.
2. One-way control valve according to claim 1, characterized in that the end face of the throat (11) is provided with a chamfer facing the joint (2).
3. The check valve as claimed in claim 1, wherein one end of the valve body (1) welded and fitted with the joint (2) has a stepped portion (12), the throat portion (11) is provided on an outer circumferential surface of the stepped portion (12), and the fixing seat (32) is fixed to a bottom of the stepped portion (12).
4. One-way control valve according to claim 1, characterized in that the welding material is filled between the throat portion (11) and the conical surface portion (21), and the angle (B) between the throat portion (11) and the conical surface portion (21) is between 5 ° and 15 °.
5. A method of manufacturing a check control valve as in any of claims 1-4, comprising the steps of: a10: respectively preparing a valve body (1), a connector (2), an inlet connecting pipe (4) and an outlet connecting pipe (5); a20: welding the valve body (1) and the inlet connecting pipe (4) to form a valve body assembly; a30: the valve core seat component (3), the valve core component (6) and the elastic component (7) are arranged in an inner cavity of the valve body component; a40: assembling the joint (2), the outlet connection pipe (5) and the valve body assembly into an assembly of a one-way control valve; a50: and placing the assembly into a high-frequency welding device to be welded at one time to form the one-way control valve.
6. A manufacturing method of a check control valve according to claim 5, characterized in that the high-frequency welding means comprises a first high-frequency welding coil ring (91) and a second high-frequency welding coil ring (92) which are axially spaced, the first high-frequency welding coil ring (91) corresponding to a welding position between the connector (2) and the outlet nipple (5); the second high-frequency welding coil ring (92) corresponds to a welding position between the connector (2) and the valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710139706.XA CN108571604B (en) | 2017-03-10 | 2017-03-10 | One-way control valve and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710139706.XA CN108571604B (en) | 2017-03-10 | 2017-03-10 | One-way control valve and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN108571604A CN108571604A (en) | 2018-09-25 |
| CN108571604B true CN108571604B (en) | 2020-05-22 |
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| CN201710139706.XA Active CN108571604B (en) | 2017-03-10 | 2017-03-10 | One-way control valve and manufacturing method thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707873B (en) * | 2019-01-17 | 2020-05-22 | 北京宇航***工程研究所 | Corrugated spring anti-vibration check valve |
| CN111810480A (en) * | 2019-04-12 | 2020-10-23 | 浙江三花制冷集团有限公司 | Reversing valve and manufacturing method thereof |
| CN111734617A (en) * | 2020-07-27 | 2020-10-02 | 上海海立新能源技术有限公司 | Compressor and compressor flow protection device and method thereof |
| CN114294452A (en) * | 2022-01-26 | 2022-04-08 | 沈阳航天新光集团有限公司 | Check valve with filtering capability |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06331240A (en) * | 1993-05-20 | 1994-11-29 | Mitsubishi Heavy Ind Ltd | Circuit for refrigerant |
| US7293689B2 (en) * | 2004-04-06 | 2007-11-13 | United Technologies Corporation | Two tier brazing for joining copper tubes to manifolds |
| CN103867749B (en) * | 2012-12-12 | 2018-04-10 | 杭州通产机械有限公司 | A kind of flow passage selector device |
| US10626870B2 (en) * | 2015-06-11 | 2020-04-21 | Bitzer Kuehlmaschinenbau Gmbh | Ring weld blocker in discharge check valve |
| CN205064939U (en) * | 2015-09-22 | 2016-03-02 | 浙江盾安机械有限公司 | One -way valve |
| CN205118347U (en) * | 2015-11-03 | 2016-03-30 | 上海恒温控制器厂有限公司 | Refrigeration check valve |
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Effective date of registration: 20220815 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: Sanhua Refrigeration Group, Xialiquan Village, Qixing Street, Xinchang County, Shaoxing City, Zhejiang Province, 312500 Patentee before: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. |