JP6308685B2 - Energized closed solenoid valve manufacturing method and energized closed solenoid valve - Google Patents

Description

  The present invention relates to a method for manufacturing an energized closed solenoid valve that is closed by energization of an electromagnetic coil and is opened by de-energization, and an energized closed solenoid valve.

  Conventionally, as the energization closed type solenoid valve, for example, there are those disclosed in Japanese Utility Model Publication No. 8-5431 (Patent Document 1) and Japanese Patent Application Laid-Open No. 54-96828 (Patent Document 2). FIG. 4 is a diagram showing a conventional energized closed solenoid valve disclosed in Patent Document 1, and this energized closed solenoid valve is a refrigerant for a main cooler when rapid cooling is required, for example, in a domestic refrigerator-freezer. The supply is cut off and all refrigerant is supplied only to the quick cooler, and it is a small one that can be energized and closed only when necessary.

  In this solenoid valve, a valve chamber a1 and a plunger chamber a2 are formed in the valve body a by cutting or the like, and a cylindrical plunger tube a3 extending from the plunger chamber a2 toward the electromagnetic drive unit b is integrated with the valve body a. It is molded into. The plunger b1 of the electromagnetic drive unit b is inserted into the plunger tube a3, and the suction element b2 is fixed to the end of the plunger tube a3. And in order to ensure the airtightness in the plunger tube a3, the suction element b2 and the edge part of the plunger tube a3 are brazed. In the valve body a, a valve seat a4 and a valve port a5 are formed between the valve chamber a1 and the plunger chamber a2. A ball valve c as a “valve element” is arranged in the valve chamber a1.

  Further, the ball valve c is disposed with a valve spring e in a cylindrical guide d1 formed in the blind plug d, and the blind plug d is screwed into an end portion of the valve chamber a1 (valve body a) so as to be in the valve chamber a1. Is sealed. And in order to ensure the airtightness of the valve chamber a1, the blind plug d and the end of the valve body a are brazed. The valve port a5 has a structure in which the valve chamber a1 and the plunger chamber a2 communicate with each other, and a pin b3 attached to the end of the plunger b1 is in contact with the ball valve c through the valve port a5. Further, a primary side joint f communicating with the valve chamber a1 and a secondary side joint g communicating with the plunger chamber a2 are attached to the valve body a. The primary side joint f and the secondary side joint g are connected to the valve body a. It is brazed.

  That is, the fluid that has entered the valve chamber a1 from the primary side joint f is directed to the secondary side joint g through the valve port a5, and when the electromagnetic coil b4 of the electromagnetic drive unit b is energized, the plunger b1 is pulled up. The ball valve c is pushed up by the valve spring e to close the valve port a5 of the valve seat a4.

No. 8-5431 JP-A-54-96828

  As described above, the energized closed solenoid valve has a structure in which the valve element (ball valve c) is disposed on the opposite side of the plunger b1 (electromagnetic drive unit b) with the valve port a5 (valve seat a4) interposed therebetween. On the other hand, as is apparent from the structure of the conventional solenoid valve, a ball valve c is incorporated in the guide d1 of the blind plug d together with the valve spring e, and the blind plug d is formed in the valve body a. Inserted from the a1 side, the blind plug d is fixed to the valve body a. On the other hand, the plunger b1 is inserted into the plunger chamber a2 from the plunger tube a3 formed integrally with the valve body a. For this reason, assembly work was complicated. Further, since the valve chamber a1 and the plunger chamber a2 are formed by cutting from opposite sides of the valve body a, there is a problem that it is difficult to center the parts.

  An object of the present invention is to facilitate assembly work and increase the accuracy of centering in a method for manufacturing an energized closed electromagnetic valve in which a valve body is disposed on the opposite side of a plunger with a valve port interposed therebetween.

  The method for manufacturing an energized closed solenoid valve according to claim 1 includes a valve body having a valve chamber communicating with a primary side joint, and a plunger chamber communicating with a secondary side joint and a plunger tube of an electromagnetic drive unit, A valve body for opening and closing a valve port communicating with the valve chamber and the plunger chamber is located on the valve chamber side, and the valve body is moved by the movement of the plunger in the plunger tube to open and close the valve port. A method for manufacturing a type electromagnetic valve, wherein an annular receiving seat portion having an insertion hole in the center is formed between the valve chamber and the plunger chamber of the valve body, and the primary side joint, the secondary side A side joint and the plunger tube are fixed to the valve body to form a body assembly, and a valve holder having the valve port having the valve port and a valve guide part are integrally formed in the valve guide part of the valve holder. Before A valve assembly is configured by holding a valve body, the valve assembly is inserted from the plunger tube side of the main assembly, the valve guide portion is inserted from the insertion hole into the valve chamber, and the valve seat portion So that the valve seat and the plunger chamber are sealed between the valve seat and the plunger chamber, and the valve assembly is fixed in the valve body. It is characterized by that.

  The method for manufacturing the energized closed solenoid valve according to claim 2 is the method for manufacturing the energized closed solenoid valve according to claim 1, wherein the valve seat portion is screwed into a cylindrical portion having a diameter larger than that of the receiving seat portion. Thus, the valve assembly is fixed in the valve body.

  The method for manufacturing the energized closed solenoid valve according to claim 3 is the method for manufacturing the energized closed solenoid valve according to claim 1, wherein the valve seat portion is press-fitted into a fitting hole having a diameter larger than that of the insertion hole. In addition, the valve assembly is fixed in the valve body by caulking the rim at the opening end of the fitting hole.

  The method for manufacturing an energized closed solenoid valve according to claim 4 is the method for manufacturing an energized closed solenoid valve according to any one of claims 1 to 3, wherein the plunger tube is made of stainless steel, and the valve After the assembly is fixed in the valve body, the plunger is inserted into the plunger tube, and the attractor of the electromagnetic drive unit is fixed to the plunger tube by welding. .

  The energized closed solenoid valve according to claim 5 includes a valve body having a valve chamber communicating with the primary side joint, and a plunger chamber communicating with the secondary side joint and the plunger tube of the electromagnetic drive unit. An energized closed solenoid valve that opens and closes the valve port by moving the valve body by movement of the plunger in the plunger tube, and a valve body that opens and closes the valve port communicating with the plunger chamber is located on the valve chamber side The valve body has an annular receiving seat portion having an insertion hole in the center between the valve chamber and the plunger chamber, and a valve seat portion and a valve guide portion having the valve port, Is provided with a valve assembly that holds the valve body in the valve guide portion of the valve holder, and the valve guide portion of the valve assembly is inserted into the insertion hole and the valve chamber. , The valve assembly During the valve seat portion is abutted to the receiving seat in the plunger chamber side of the valve chamber and the plunger chamber, characterized in that the sealed.

  According to the manufacturing method of the energized closed solenoid valve according to claim 1, the valve main body and the valve seat portion are configured as separate members, and the valve assembly and the plunger constituting the valve seat portion and the valve body with respect to the main body assembly. Are assembled from the same side, making assembly work easier. In addition, the valve seat part, valve guide part, and valve body are preassembled as a valve assembly, which is assembled to the main assembly, so that the centering of the valve port and valve body is accurate, and the valve body is stable. For example, the amount of valve leakage when the valve is closed can be reduced.

  According to the manufacturing method of the energized closed solenoid valve of claim 2, in addition to the effect of claim 1, the valve assembly can be fixed in the valve body simply by screwing the valve seat portion of the valve assembly into the cylindrical portion. Furthermore, assembly work is facilitated.

  According to the method of manufacturing the energized closed solenoid valve of claim 3, in addition to the effect of claim 1, the valve seat portion of the valve assembly is press-fitted into the fitting hole, and the rim of the opening end portion of the fitting hole is obtained. Since the valve assembly can be fixed in the valve body simply by caulking, the assembly work is further facilitated.

  According to the manufacturing method of the energization closed solenoid valve of claim 4, in addition to the effect of any one of claims 1 to 3, the plunger tube is made of stainless steel, and the attractor is welded to the plunger tube. Since it can fix, brazing processing and soldering processing can be made into the minimum number of times.

  According to the energization closed solenoid valve of claim 5, the same effect as in claim 1 can be obtained.

It is a longitudinal cross-sectional view of the valve open state of the energization closed type solenoid valve concerning a 1st embodiment of the present invention. It is a figure explaining the principal part of the manufacturing process of the electricity supply closed type solenoid valve of 1st Embodiment. It is a longitudinal cross-sectional view of the valve open state of the energization closed type solenoid valve concerning a 2nd embodiment of the present invention. It is a longitudinal cross-sectional view which shows an example of the conventional electricity supply closed type solenoid valve.

  Next, a method for manufacturing an energized closed solenoid valve and an embodiment of an energized closed solenoid valve according to the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of the energized closed solenoid valve according to the first embodiment in an open state. Note that the concept of “upper and lower” in the following description corresponds to the upper and lower sides in the drawing of FIG.

  The energization closed solenoid valve 10 according to this embodiment has a valve body 1 made of metal such as brass. The valve body 1 includes a valve chamber 11, a plunger chamber 12, an insertion hole 13 communicating with the valve chamber 11 and the plunger chamber 12, a plunger tube mounting hole 14, a pipe connection hole 15, and a pipe connection hole 16. However, it is formed by cutting. The valve body 1 is formed with an annular receiving seat 17 between the valve chamber 11 and the plunger chamber 12 by forming an insertion hole 13. That is, the receiving seat part 17 has the insertion hole 13 in the center. Further, the plunger chamber 12 has a cylindrical portion 18 centering on an axis L having a diameter larger than that of the receiving seat portion 17. Among these, the valve chamber 11, the plunger chamber 12, the insertion hole 13, the plunger tube mounting hole 14, the pipe connection hole 15, the receiving seat portion 17, and the cylindrical portion 18 are formed coaxially about the axis L.

  A stainless steel cylindrical plunger tube 31 of an electromagnetic drive unit 3 to be described later is attached to the plunger tube attachment hole 14. A primary side joint 15a into which a fluid flows is attached to the pipe connection hole 15 as shown by an arrow, and a secondary side joint 16a from which a fluid flows out is attached to the pipe connection hole 16 as shown by an arrow. The primary side joint 15a is communicated with the valve chamber 11 via the primary port 15b, and the secondary side joint 16a is communicated with the plunger chamber 12 via the secondary port 16b. The plunger tube 31, the primary side joint 15 a and the secondary side joint 16 a are connected to the valve body 1 by brazing around the open ends of the plunger mounting hole 14, the pipe connection hole 15 and the pipe connection hole 16, respectively. The main body 1 is fixed.

  A valve assembly 2 is accommodated in the valve chamber 11. The valve assembly 2 is made of a metal-made substantially cylindrical holder portion 21, a metal ball valve 22, a thin cylindrical lid member 23, and a valve spring 24. The holder portion 21 is configured by integrally forming a valve seat portion 21A having a valve port 25 at the center and a cylindrical valve guide portion 21B having an inner diameter matching the outer diameter of the ball valve 22. Then, the ball valve 22 is fitted into the valve guide portion 21B via the valve spring 24, the lid member 23 is fitted from the end portion of the valve guide portion 21B, and the end portion of the valve guide portion 21B is caulked to thereby close the lid. The member 23 is fixed. The lid member 23 may be a prismatic member or the like as will be described later.

  Thereby, in the valve assembly 2, the ball valve 22 is held in the holder portion 21 and is guided by the valve guide portion 21B so as to move only in the direction of the axis L. A passage 21Ba for communicating the valve chamber 11 and the valve port 25 is formed on the side of the valve guide portion 21B on the valve seat portion 21A side. Further, the valve guide portion 21B is formed with a flow path 21Bb for flowing the liquid accumulated under the ball valve 22 to the valve chamber 11 side. The lid member 23 has a thin cylindrical shape, but a similar lid member may be a prismatic member such as a hexagonal prism or a quadrangular prism. In this case, even after the end portion of the valve guide portion 21B is caulked, the liquid accumulated under the ball valve 22 can be flowed to the valve chamber 11 side by the side portion of the prismatic column, similarly to the flow path 21Bb. Furthermore, the side surface of the columnar member may be provided with a vertical groove for flowing liquid toward the valve chamber 11. Of course, in these cases, the flow path 21Bb may or may not be present.

  The valve seat portion 21A has a tapered surface 21Aa whose diameter increases as the distance from the valve guide portion 21B increases. Furthermore, an internal thread portion 18a is formed on the inner periphery of the cylindrical portion 18 of the valve body 1, and an external thread portion 21Ab that engages with the internal thread portion 18a is formed on the outer periphery of the valve seat portion 21A. As a result, the valve guide portion 21B is inserted into the insertion hole 13, the tapered surface 21Aa of the valve seat portion 21A is brought into contact with the inner end portion (opening end portion of the insertion hole 13) of the receiving seat portion 17, and the male screw portion 21Ab. Is fixed to the valve main body 1 by screwing into the female screw portion 18a. The tapered surface 21Aa of the valve seat portion 21A and the inner end portion of the receiving seat portion 17 seal between the valve chamber 11 and the plunger chamber 12. A seal member may be disposed between the receiving seat portion 17 and the tapered surface 21Aa. A minus groove 21Ac is formed at the end of the valve seat portion 21A to engage a jig when screwed.

  In the electromagnetic drive unit 3, a plunger 32 is inserted into the plunger tube 31, and this plunger 32 is arranged to be slidable in the direction of the axis L (up and down direction). A suction element 33 is fitted to the upper end of the plunger tube 31, and a plunger spring 34 is disposed between the plunger 32 and the suction element 33 to urge the plunger 32 in a direction away from the suction element 33. Yes. An electromagnetic coil 36 is disposed on the outer periphery of the plunger tube 31 via a bobbin 35, and the electromagnetic coil 36 and the bobbin 35 are molded with a resin 35a on the outer periphery thereof. Further, the bobbin 35 and the resin 35 a are covered with an outer box 37 and a magnetic guide 38, and the upper part of the outer box 37 is screwed to the attractor 33 with a screw N. A lead wire 39 for energizing the electromagnetic coil 36 is drawn out of the outer box 37. The plunger 32, the attractor 33, the outer box 37, and the magnetic guide 38 are each made of a magnetic material. The suction element 33 is fixed to the plunger tube 31 made of stainless steel by welding the entire circumference of the joint portion indicated by the symbol “P” in the drawing. Thereby, the inside of the plunger tube 31 is airtightly sealed.

  A pin insertion hole 32a is formed on the valve assembly 2 side of the plunger 32, and a pin 321 (round bar) is attached to the pin insertion hole 32a. The pin 321 is inserted into the valve port 25 of the valve seat portion 21 </ b> A, and the end of the pin 321 is in contact with the ball valve 22.

  In FIG. 1, the electromagnetic drive unit 3 is in a non-energized state, and the plunger 32 presses the ball valve 22 downward with a pin 321 by the urging force of the plunger spring 34 and the weight of the plunger 32. Thereby, the ball valve 22 is separated from the valve seat portion 21A, and the valve port 25 is in the valve open state. When the electromagnetic coil 36 of the electromagnetic drive unit 3 is energized, the plunger 32 is attracted to the attractor 33 against the biasing force of the plunger spring 34, and the ball valve 22 together with the plunger 32 and the pin 321 is biased by the biasing force of the valve spring 24. Rises and sits on the valve seat portion 21A, and the valve port 25 is closed.

  FIG. 2 is a diagram for explaining a main part of the manufacturing process of the energized closed solenoid valve 10 according to the first embodiment, and the manufacturing method of the present invention is carried out by this manufacturing process. The dimensions of each part are as follows. As shown in FIG. 2, the inner diameter φA of the insertion hole 13 (the inner side of the receiving seat portion 17) of the valve body 1 is slightly larger than the outer diameter φB of the valve guide portion 21 </ b> B of the valve assembly 2. Further, the outer diameter of the valve seat portion 21A (the outer diameter of the male screw portion 21Ab) φC is larger than the outer diameter φB of the valve guide portion 21B. Further, the inner diameter φD of the plunger tube 31 is slightly larger than the outer diameter φC of the valve seat portion 21A.

  First, the plunger tube 31, the primary side joint 15a, and the secondary side joint 16a are attached to the valve body 1, and the plunger tube 31, the primary side joint 15a, and the secondary side joint 16a are connected to the valve body 1 as described above. The body assembly 20 is formed by fixing. On the other hand, the valve assembly 2 is assembled in a separate process. That is, the ball valve 22 and the valve spring 24 are fitted into the valve guide portion 21B of the holder portion 21, the lid member 23 is fitted to the end portion of the valve guide portion 21B, and the end portion of the valve guide portion 21B is crimped. Fix it. Thereby, the valve assembly 2 is assembled.

  Next, the valve assembly 2 is inserted from the plunger tube 31 of the body assembly 20, the valve guide portion 21 </ b> B is inserted into the insertion hole 13, and the male screw portion 21 </ b> Ab of the valve seat portion 21 </ b> A is screwed into the female screw portion 18 a of the cylindrical portion 18. The tapered surface 21 </ b> Aa of the valve seat portion 21 </ b> A is brought into contact with the inner end portion of the seat portion 17. Thereby, the valve assembly 2 is fixed in the valve chamber 11 and the plunger chamber 12. In this manner, the space between the valve chamber 11 and the plunger chamber 12 is sealed by bringing the tapered surface 21Aa into close contact with the end portion of the seat portion 17.

  Next, the plunger 32 to which the pin 321 is fixed is inserted into the plunger tube 31, and the pin 321 is inserted into the valve port 25 of the valve seat portion 21A. And after arrange | positioning the plunger spring 34, the suction element 33 is fitted to the upper end of the plunger tube 31, and the suction element 33 is fixed to the plunger tube 31 by welding as mentioned above. The electromagnetic drive unit 3 is assembled by fitting a magnetic guide 38 and an outer box 37 to a coil component obtained by molding the bobbin 35 and the electromagnetic coil 36 with a resin 35a. Then, the hollow portions of the magnetic guide 38 and the bobbin 35 are fitted into the plunger tube 31, and are screwed to the attractor 33 with a screw N at the upper part of the outer box 37.

  As described above, since the valve assembly 2 and the plunger 32 are assembled to the main assembly 20 (valve main body 1) from the same side, the assembling work is facilitated. Further, since the valve seat portion 21A, the valve guide portion 21B, the ball valve 22 and the valve spring 24 are assembled in advance as the valve assembly 2 and assembled to the valve body 1, the core of the valve port 25 and the ball valve 22 is assembled. As a result, the ball valve 22 is stably seated, and the amount of valve leakage when the valve is closed can be reduced. In addition, since at least the plunger mounting hole 14, the plunger chamber 12 and the insertion hole 13 can be cut from the same side when the valve body 1 is processed, the processing is facilitated, leading to a reduction in parts cost and more accurate centering. Become.

  Here, in the conventional solenoid valve, the primary side joint f and the secondary side joint g are already fixed to the valve body a before the blind plug d is fixed to the valve body a. Yes. The primary side joint f and the secondary side joint g are performed on the valve body a by burner brazing or in-furnace brazing. The blind plug d is airtightly fixed to the valve body a by brazing after screwing. Furthermore, the plunger tube a3 is made of, for example, brass that is integral with the valve body a, and the suction element b2 is also airtightly fixed to the plunger tube a3 by brazing or the like.

  That is, in the conventional solenoid valve, the brazing process is performed three times. When this brazing treatment is performed, it is necessary to perform a washing step such as pickling in order to remove flux and burn. Pickling is not preferable from the viewpoint of environmental protection and pollution prevention. Moreover, since it is exposed to high temperature every time it brazes, there exists a problem that a distortion of a dimension arises or it leads to embrittlement of material. Therefore, such a brazing process is required to reduce the number of times as much as possible.

  On the other hand, in this embodiment, the plunger tube 31, the primary side joint 15a, and the secondary side joint 16a can be fixed to the valve body 1 by a single brazing process. Moreover, since the plunger tube 31 is made of stainless steel and the suction element 33 can be fixed by welding and sealed, it is not necessary to perform brazing treatment here. Therefore, the brazing process can be minimized.

  FIG. 3 is a longitudinal cross-sectional view of the energized closed solenoid valve according to the second embodiment in an open state. The major difference between the second embodiment and the first embodiment is the position of the primary side joint 15a and the fixing structure of the valve assembly 2 and the valve body 1. In this 2nd Embodiment, the same code | symbol is attached | subjected to the element same as 1st Embodiment, and a corresponding element. These elements with the same reference numerals have the same structure and the same function and effect, and repeated description will be omitted as appropriate.

  In the energized closed solenoid valve 10 'according to the second embodiment, a pipe connection hole 15' is formed in the side portion of the valve body 1, and a primary side joint 15a 'is attached to the pipe connection hole 15' in this side portion. Yes. A primary port 15b 'is formed on the side surface of the valve chamber 11, and the primary side joint 15a' communicates with the valve chamber 11 via the primary port 15b '. As a result, the fluid flows in from the side to the energized closed electromagnetic valve 10 'and flows out sideways.

  The valve seat portion 21A ′ of the valve assembly 2 according to the second embodiment has an outer diameter smaller than that of the valve seat portion 21A of the first embodiment. A fitting hole 19 extending to the side is formed. The inner diameter of the fitting hole 19 is larger than the inner diameter of the insertion hole 13 and is sized to fit the valve seat portion 21A ′. Then, the valve seat portion 21A ′ is press-fitted into the fitting hole 19, and the rim 19a at the opening end portion of the fitting hole 19 is caulked inside (the valve seat portion 21A ′ side). It is fixed to the valve body 1. Also in the second embodiment, the valve guide portion 21B is inserted into the insertion hole 13, and the tapered surface 21Aa 'of the valve seat portion 21A' is brought into contact with the inner end portion of the receiving seat portion 17, so that the valve chamber 11 and the plunger chamber 12 is sealed. In the second embodiment as well, the lid member 23 may be a prism member or a vertical groove as in the first embodiment.

  The manufacturing process of the energized closed solenoid valve 10 'according to the second embodiment is as follows. That is, instead of the process of screwing the valve assembly 2 into the cylindrical portion 18 in the manufacturing process shown in FIG. 2 according to the first embodiment, the valve seat portion 21A ′ of the valve assembly 2 is press-fitted into the fitting hole 19, and the rim A step of caulking 19a is provided. Other steps are the same as those in the first embodiment.

  In the above embodiment, the example in which the valve body is a ball valve has been described. However, as long as the valve body is disposed on the valve chamber side with respect to the valve seat portion, the valve body may have another shape. For example, it may be a cylindrical valve or a needle valve having a tapered surface at the end.

  In the embodiment, since the valve spring is provided in the valve assembly, the valve closed state can be reliably maintained even with a low differential pressure, and chattering due to a pressure change can be prevented. However, in the energized closed solenoid valve, the valve body can also close the valve port by the pressure of the fluid flowing from the primary side, and in such a case, there is no need for the valve spring.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention.

DESCRIPTION OF SYMBOLS 1 Valve main body 11 Valve chamber 12 Plunger chamber 13 Insertion hole 14 Plunger tube attachment hole 15 Piping connection hole 15a Primary side joint 16 Piping connection hole 16a Secondary side joint 17 Receiving seat part 18 Cylindrical part 18a Female thread part 2 Valve assembly 21 Holder part 21A Valve seat portion 21Aa Tapered surface 21Ab Male screw portion 21B Valve guide portion 21Ba Passage 21Bb Flow passage 22 Ball valve 23 Lid member 24 Valve spring 25 Valve port 3 Electromagnetic drive portion 31 Plunger tube 32 Plunger 32a Pin insertion hole 321 Pin 33 Suction element 34 Plunger spring 10 Energized closed solenoid valve 20 Body assembly 10 'Energized closed solenoid valve 15' Pipe connection hole 15a 'Primary side joint 19 Fitting hole 19a Rim 21A' Valve seat 21Aa 'Tapered surface

Claims (5)

The valve body includes a valve chamber that communicates with the primary side joint, and a plunger chamber that communicates with the secondary side joint and the plunger tube of the electromagnetic drive unit, and opens and closes the valve port that communicates the valve chamber and the plunger chamber. A valve body that is positioned on the valve chamber side, and moves the valve body by movement of a plunger in the plunger tube to open and close the valve port.
Between the valve chamber of the valve body and the plunger chamber, an annular receiving seat portion having an insertion hole in the center is formed,
The primary side joint, the secondary side joint and the plunger tube are fixed to the valve main body to constitute a main body assembly,
A valve holder in which a valve seat portion having the valve port and a valve guide portion are integrally formed, and the valve body is held in the valve guide portion of the valve holder to constitute a valve assembly;
The valve assembly is inserted from the plunger tube side of the body assembly, the valve guide portion is inserted from the insertion hole into the valve chamber, the valve seat portion is brought into contact with the receiving seat portion, and the valve Sealing between the valve chamber and the plunger chamber with a seat portion and the receiving seat portion, the valve assembly was fixed in the valve body,
The manufacturing method of the energization closed type solenoid valve characterized by the above-mentioned. It is a manufacturing method of the energization closed electromagnetic valve according to claim 1,
A method for manufacturing an energized closed solenoid valve, wherein the valve assembly is fixed in the valve body by screwing the valve seat portion into a cylindrical portion having a diameter larger than the receiving seat portion. It is a manufacturing method of the energization closed electromagnetic valve according to claim 1,
The valve assembly is fixed in the valve body by press-fitting a valve seat into a fitting hole having a diameter larger than that of the insertion hole and caulking a rim at the opening end of the fitting hole. A method of manufacturing an energized closed solenoid valve characterized by the above. It is a manufacturing method of the energization closed type solenoid valve according to any one of claims 1 to 3,
The plunger tube is made of stainless steel, and after the valve assembly is fixed in the valve body, the plunger is inserted into the plunger tube, and the attractor of the electromagnetic drive unit is welded to the plunger tube. The manufacturing method of the energization closed type solenoid valve characterized by adhering by. The valve body includes a valve chamber that communicates with the primary side joint, and a plunger chamber that communicates with the secondary side joint and the plunger tube of the electromagnetic drive unit, and opens and closes the valve port that communicates the valve chamber and the plunger chamber. A valve body that is located on the valve chamber side, and is an energized closed electromagnetic valve that opens and closes the valve port by moving the valve body by movement of a plunger in the plunger tube,
The valve body has an annular receiving seat portion having an insertion hole in the center between the valve chamber and the plunger chamber,
A valve assembly that holds the valve body in the valve guide portion of the valve holder by a valve holder in which a valve seat portion having the valve port and a valve guide portion are integrated;
The valve guide portion of the valve assembly is inserted into the insertion hole and the valve chamber, and the valve seat portion of the valve assembly is in contact with the receiving seat portion on the plunger chamber side so that the valve chamber and the valve assembly An energized closed solenoid valve characterized in that the space between the plunger chamber and the plunger chamber is sealed.

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