WO2014174954A1

WO2014174954A1 - Valve device

Info

Publication number: WO2014174954A1
Application number: PCT/JP2014/057835
Authority: WO
Inventors: 壮英本藤; 忠顕池田; 明櫻井
Original assignee: 株式会社鷺宮製作所
Priority date: 2013-04-22
Filing date: 2014-03-20
Publication date: 2014-10-30
Also published as: JP6505193B2; JP2018025305A; JPWO2014174954A1

Abstract

Provided is a valve device having a configuration which enables a pipe member to be more easily joined by laser welding to the peripheral wall of a cylindrically shaped valve housing. A solenoid valve (1) is configured in such a manner that the peripheral wall (12) of the plunger tube (10) thereof has a single flat surface portion (13) in which a through-hole (14) is formed, the through-hole (14) connecting the inside and outside of the plunger tube (10) and allowing one end of a first joint (81) to be fitted therein. The first joint (81) is joined by laser welding to the flat surface portion (13) while the one end of the first joint (81) is fitted in the through-hole (14) corresponding to the one end.

Description

Valve device

The present invention relates to a valve device including a valve housing and a piping member joined thereto.

Conventionally, as a valve device, for example, there is an electromagnetic valve disclosed in Patent Document 1. As shown in FIG. 7, the electromagnetic valve 801 disclosed in Patent Document 1 includes a cylindrical metal plunger tube 810 and a metal fluid inlet joint 881. The plunger tube 810 forms a valve chamber 811, and a fluid inlet joint 881 is joined to the peripheral wall portion 812 by brazing.

In the electromagnetic valve 801 described above, as a brazing method between the plunger tube 810 and the fluid inlet joint 881, for example, when brazing in a furnace is used, it takes time to increase the temperature, so that the entire member to be brazed becomes high temperature. When heated, the plunger tube 810 and the fluid inlet joint 881 may become blunt. As a result, the plunger tube 810 and the fluid inlet joint 881 are likely to be deformed during handling, and this deformation makes it impossible to connect to the other pipe, or the plunger tube 810 and the plunger 820, valve body 830, and There was a possibility that the dimensional change of the valve seat member 840 or the like might occur. In particular, when the dimensional change of the valve seat member 840 occurs, the sealing performance between the valve seat member 840 and the valve body 830 may be deteriorated.

Therefore, in order to avoid such a problem, each member is heated so that only the joining portion and the vicinity thereof are heated by joining the plunger tube 810 and the fluid inlet joint 881 using welding instead of brazing. It is conceivable to avoid dullness and dimensional change. By using laser welding as the welding method, one point is concentrated and heated by the laser beam, so that it is possible to effectively avoid blunting and dimensional change of each member.

JP 2011-236937 A

However, in laser welding, it is necessary to focus on the welded portion. In the above-described electromagnetic valve 801, the plunger tube 810 has a cylindrical shape. Therefore, as shown in FIGS. 8A and 8B, the plunger tube The peripheral edge of the communication hole 814 provided to open in the peripheral wall portion 812 of 810 is not three-dimensionally curved but is three-dimensionally curved. Therefore, the peripheral edge S of the joint portion between the plunger tube 810 and the fluid inlet joint 881 is also not three-dimensionally curved as shown in FIGS. 9 (a) and 9 (b). In order to focus the light, it is necessary to move the laser in a three-dimensional direction, and joining using laser welding has a problem that the number of manufacturing steps increases and the cost increases.

Therefore, an object of the present invention is to provide a valve device having a configuration in which a pipe member can be more easily joined to a peripheral wall portion of a cylindrical valve housing using laser welding.

In order to solve the above problems, the invention described in claim 1 is a valve device including a cylindrical valve housing and one or a plurality of piping members joined to a peripheral wall portion of the valve housing. The peripheral wall portion of the valve housing communicates with the inside and the outside of the valve housing and has one planar portion formed with one or a plurality of communication holes into which one end portions of the one or more piping members are fitted. And the one or more piping members are joined to the planar portion by laser welding in a state where one end is fitted to the corresponding one or more communication holes. It is a valve device.

In order to solve the above-described problem, the invention described in claim 2 is a valve device including a cylindrical valve housing and a plurality of piping members joined to a peripheral wall portion of the valve housing. The peripheral wall portion of the housing has a plurality of planar portions formed by distributing a plurality of communication holes that communicate with the inside and outside of the valve housing and are fitted with one end portions of the plurality of piping members. The valve device is characterized in that a pipe member is joined to the plurality of planar portions by laser welding in a state in which one end is fitted to the plurality of communication holes corresponding to each of the piping members.

According to the first aspect of the present invention, the peripheral wall portion of the valve housing communicates with the inside and outside of the valve housing, and the one or more communication holes into which one end portions of the one or more piping members are fitted. It has one planar part formed. And one or a plurality of piping members are joined to the above-mentioned plane part by laser welding in the state where one end was fitted in one or a plurality of communicating holes corresponding to each, respectively. Since it did in this way, since the communicating hole by which the one end part of a piping member is fitted is provided in the plane part, the peripheral edge of a communicating hole is contained in one plane. Therefore, when one end portion of the piping member is fitted into the communication hole, the peripheral edge of the joint where the outer peripheral surface of the piping member and the inner peripheral surface of the communication hole are included in one plane. There is no need to move the laser in the three-dimensional direction in order to focus the light, and it is only necessary to move the laser in the two-dimensional direction along the one plane after the laser light is focused once. Thereby, a piping member can be more easily joined to the surrounding wall part of a cylindrical valve housing using laser welding.

According to the invention described in claim 2, the peripheral wall portion of the valve housing is formed by distributing a plurality of communication holes that communicate with the inside and outside of the valve housing and are fitted with one end portions of the plurality of piping members. It has a plurality of plane portions. The plurality of piping members are joined to the plurality of planar portions by laser welding in a state where one end portions are fitted into the plurality of communication holes corresponding to the respective piping members. Since it did in this way, since the communicating hole by which the one end part of a piping member is fitted is provided in the plane part, the peripheral edge of a communicating hole is contained in one plane. Therefore, when one end portion of the piping member is fitted into the communication hole, the peripheral edge of the joint where the outer peripheral surface of the piping member and the inner peripheral surface of the communication hole are included in one plane. There is no need to move the laser in the three-dimensional direction in order to focus the light, and it is only necessary to move the laser in the two-dimensional direction along the one plane after the laser light is focused once. Thereby, a piping member can be more easily joined to the surrounding wall part of a cylindrical valve housing using laser welding.

It is a longitudinal cross-sectional view of the solenoid valve of one Embodiment of this invention. (A) is a perspective view which shows a part of plunger tube with which the solenoid valve of FIG. 1 is provided, (b) is sectional drawing which follows the XX line of (a). (A) is a perspective view showing a state where the first joint is fitted to the plunger tube of FIG. 2 (a), and (b) is a cross-sectional view taken along line XX of (a). (A) is a fragmentary sectional view which shows the state before welding of the plunger tube with which the solenoid valve of FIG. 1 is equipped, a valve seat member, a 1st coupling, and a 2nd coupling, (b) shows the state after welding. It is a fragmentary sectional view. (A) is a fragmentary perspective view which shows the structure of the 1st modification of the solenoid valve of FIG. 1 (structure in which the several communication hole was formed in one plane part), (b) is FIG. It is a fragmentary perspective view which shows the structure of the 2nd modification of a solenoid valve (structure in which one communicating hole was formed in each of several plane parts). (A) is a fragmentary perspective view which shows the structure of the reference example of the solenoid valve of FIG. 1 (structure in which one communicating hole was formed in one plane part), (b) is the solenoid valve of FIG. It is a fragmentary perspective view which shows the structure of a reference example (structure in which several communicating holes were formed in one plane part), (c) is a fragmentary perspective view which shows the structure of the 5th modification of the solenoid valve of FIG. It is a figure (structure in which one communicating hole was formed in each of a plurality of plane parts). It is a longitudinal cross-sectional view of the conventional solenoid valve. (A) is a perspective view which shows a part of plunger tube with which the solenoid valve of FIG. 7 is equipped, (b) is sectional drawing which follows the XX line of (a). (A) is a perspective view showing a state in which the first joint is fitted to the plunger tube of FIG. 8 (a), and (b) is a sectional view taken along line XX of (a).

Hereinafter, an electromagnetic valve according to an embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a longitudinal sectional view of a solenoid valve according to an embodiment of the present invention. 2A is a perspective view of a part of a plunger tube included in the electromagnetic valve of FIG. 1, and FIG. 2B is a cross-sectional view taken along line XX of FIG. 3A is a perspective view showing a state in which the first joint is fitted to the plunger tube of FIG. 2A, and FIG. 3B is a cross-sectional view taken along line XX of FIG. is there. 4A is a partial cross-sectional view showing a state before the plunger tube and the valve seat member, the first joint, and the second joint of the solenoid valve of FIG. 1 are welded, and FIG. 4B is a state after welding. FIG. In addition, the concept of “upper and lower” in the following description corresponds to the upper and lower sides in FIG. 1 and indicates the relative positional relationship between the members, and does not indicate the absolute positional relationship.

As shown in FIG. 1, the electromagnetic valve 1 of the present embodiment includes a plunger tube 10, a plunger 20, a valve body 30, a valve seat member 40, an attractor 50, a coil spring 60, and an electromagnetic coil 70. The 1st joint 81, the 2nd joint 82, the 1st welding part 91, and the 2nd welding part 92 are provided.

The plunger tube 10 is formed in a cylindrical shape using a non-magnetic metal such as austenitic stainless steel, for example. The plunger tube 10 forms a valve chamber 11 inside thereof. As shown in FIGS. 2A and 2B, the peripheral wall portion 12 of the plunger tube 10 is provided with one flat portion 13 having a part formed in a flat shape. A communication hole 14 that communicates the inside and the outside of the plunger tube 10 is provided in the central portion of the flat portion 13. The communication hole 14 is subjected to a burring process that protrudes toward the inside of the plunger tube 10. The plunger tube 10 corresponds to an example of a valve housing.

The communication hole 14 of the plunger tube 10 is provided in the plane portion 13. That is, the peripheral edge of the communication hole 14 is included in one plane. Therefore, as shown in FIGS. 3A and 3B, when one end portion of the first joint 81 described later is fitted into the communication hole 14 provided in the flat portion 13 of the plunger tube 10, the joints thereof are performed. The peripheral edge S of the location is also included in one plane. In FIG. 3 (b), a tube material 95 to be described later that is sandwiched between the inner peripheral surface of the communication hole 14 and the outer peripheral surface of the plunger tube 10 is omitted for convenience of explanation.

The plunger 20 is formed in a cylindrical shape using, for example, a magnetic metal such as iron. The plunger 20 is disposed in the plunger tube 10 so as to be slidable in the direction of the axis L (the vertical direction in the drawing).

A valve body holding portion 21 is formed at the lower end portion of the plunger 20. The valve body holding part 21 has a substantially cylindrical shape, and a claw part 21a at the lower end thereof is bent inward. A valve body 30 to be described later is accommodated inside the valve body holding portion 21 so as to be slightly movable in the direction of the axis L, and the claw portion 21a prevents the valve body 30 from coming downward. In addition, a coil spring accommodating portion 22 that accommodates a coil spring 60 (described later) formed by hollowing out the plunger 20 in the axis L direction is provided at the upper end portion of the plunger 20. The plunger 20 has a flat D-cut surface 23 formed on a part of its outer peripheral surface. The D-cut surface 23 is formed by cutting a plane parallel to the axis L direction as a cross section.

The valve body 30 is formed in a spherical shape using, for example, a metal as a material. The valve body 30 is held by the valve body holding portion 21 of the plunger 20 and moves in the direction of the axis L as the plunger 20 moves.

The valve seat member 40 is made of, for example, a metal such as austenitic stainless steel. The valve seat member 40 includes a cylindrical small-diameter portion 41, a cylindrical large-diameter portion 42 connected to the lower end of the small-diameter portion 41, a flange portion 43 formed to protrude outward from the lower end of the large-diameter portion, Are provided integrally. A valve port 44 is formed at the upper end of the small diameter portion 41. The valve seat member 40 is disposed in the plunger tube 10 with its axis superimposed on the axis L so that the valve seat member 40 is positioned in the plunger 20 and the valve port 44 faces the valve body 30 held by the plunger 20. . Further, the valve seat member 40 is joined by welding while the peripheral edge of the flange portion 43 is fitted to the lower end portion of the inner peripheral surface of the plunger tube 10.

The attractor 50 is formed in a cylindrical shape using, for example, a magnetic metal such as iron. Part of the suction element 50 is inserted into the upper end portion of the plunger tube 10 and is attached by joining the periphery of the upper end part and the portion of the outer peripheral surface of the suction element 50 that contacts the periphery by laser welding. .

The coil spring 60 has a lower end abutted against the bottom of the coil spring accommodating portion 22 formed on the plunger 20, and an upper end abutted against the lower surface of the attractor 50 in the compressed state. Is arranged in. The coil spring 60 presses the plunger 20 downward in the figure so that the valve port 44 is closed by the valve body 30 when the plunger 20 is not sucked by the suction element 50.

The electromagnetic coil 70 has a coil body 71 configured by sealing a cylindrical bobbin around which a conducting wire is wound with a resin, and an outer box 72 that houses the coil body 71. The electromagnetic coil 70 is arranged inside the coil body 71 so that a part of the plunger tube 10 and the attractor 50 are accommodated, and the outer box 72 is screwed to the attractor 50 with a screw N. When energized, the electromagnetic coil 70 generates a magnetic force to magnetize the attractor 50, whereby the plunger 20 is attracted by the magnetic force of the attractor 50 and moved upward in the figure.

The first joint 81 is formed in a tubular shape using, for example, a metal such as copper. One end of the first joint 81 is fitted into the communication hole 14 of the plunger tube 10 and joined by welding. Between the 1st coupling 81 and the plane part 13 of the surrounding wall part 12 of the plunger tube 10, the 1st welding part 91 which joins them mutually is provided. The first joint 81 corresponds to an example of a piping member.

The second joint 82 is formed in a tubular shape using, for example, a metal such as copper. One end of the second joint 82 is fitted inside the large-diameter portion 42 of the valve seat member 40 and is joined by welding. Between the 2nd coupling 82 and the large diameter part 42 of the valve seat member 40, the 2nd welding part 92 which joins them mutually is provided.

The first welding portion 91 includes stainless steel constituting the plunger tube 10, copper constituting the first joint 81, and nickel (Ni) between the planar portion 13 of the plunger tube 10 and the first joint 81. Each is a portion that has been melted by laser welding, mixed and then solidified. The plunger tube 10 and the first joint 81 are joined to each other through the first welded portion 91.

The second welded portion 92 includes stainless steel constituting the large diameter portion 42 of the valve seat member 40 and copper constituting the second joint 82 between the large diameter portion 42 of the valve seat member 40 and the second joint 82. Nickel (Ni) is a portion that is solidified after being melted and mixed by laser welding. The valve seat member 40 and the second joint 82 are joined to each other through the second welded portion 92.

Since the solenoid valve 1 has the above-described configuration, in the non-energized state where the electromagnetic coil 70 is not energized, the attractor 50 is not magnetized because the electromagnetic coil 70 does not generate a magnetic force, and the coil spring 60 is pressed. Due to the pressure, the plunger 20 is positioned away from the suction element 50. At this time, the valve body 30 is seated on the valve seat member 40 and is in a valve-closed state.

In the energized state where the electromagnetic coil 70 is energized, the attractor 50 is magnetized because the electromagnetic coil 70 generates a magnetic force, and the magnetic force generated by the attractor 50 against the pressing force of the coil spring 60 is applied. The plunger 20 is in a position in contact with the suction element 50. At this time, the valve body 30 is separated from the valve seat member 40 and is in a valve open state.

Next, an example of a method for manufacturing the above-described electromagnetic valve 1 will be described with reference to FIGS. 4 (a) and 4 (b).

(1: Welding process)
A valve seat member 40 is joined to the plunger tube 10 in advance by welding. 4A, one end portion of the first joint 81 is inserted and fitted into the communication hole 14 of the plunger tube 10, and the inner peripheral surface of the communication hole 14 of the plunger tube 10 and the first joint. A tube material 95 made of nickel (Ni) having a thickness of about 0.1 mm to 0.5 mm is press-fitted between the outer peripheral surface of 81. Alternatively, after fitting the tube material 95 into the communication hole 14 of the plunger tube 10 first, one end portion of the first joint 81 may be press-fitted inside the tube material 95 and fitted. That is, the first joint 81 is fitted into the communication hole 14 of the plunger tube 10, and the tube material 95 is sandwiched between the plunger tube 10 and the first joint 81.

Next, the inner peripheral surface portion of the communication hole 14 (that is, the peripheral wall portion of the plunger tube 10), the tube material 95, and the first joint 81 are extended from the outside of the plunger tube 10 along the circumferential direction of the communication hole 14. Irradiation is stopped after irradiating the laser L so that the outer peripheral surface portions of the two melt simultaneously. As a result, as shown in FIG. 4B, the stainless steel constituting the inner peripheral surface portion of the communication hole 14 of the plunger tube 10, the nickel constituting the tube material 95, and the copper constituting the first joint 81 are melted. The first welded portion 91 is formed over the entire circumference of the communication hole 14 between the plunger tube 10 and the first joint 81 after being mixed and solidified. The plunger tube 10 and the first joint 81 are joined to each other by the first welded portion 91.

Further, as shown in FIG. 4A, one end portion of the second joint 82 is inserted and fitted into the large diameter portion 42 of the valve seat member 40, and the inner peripheral surface of the large diameter portion 42 of the valve seat member 40. And a tube member 96 made of nickel (Ni) having a thickness of about 0.1 mm to 0.5 mm is press-fitted between the first joint 82 and the outer peripheral surface of the second joint 82. Or after fitting the tube material 96 to the large diameter part 42 of the valve seat member 40 first, you may press-fit the 2nd coupling 82 inside the tube material 96, and may be fitted. That is, the second joint 82 is fitted to the large diameter portion 42 of the valve seat member 40, and the tube material 96 is sandwiched between the large diameter portion 42 of the valve seat member 40 and the second joint 82.

Next, the inner peripheral surface portion of the large-diameter portion 42 (that is, the valve seat member 40) and the tube member 96 are extended over the entire circumference from the outside of the valve seat member 40 along the circumferential direction of the inner peripheral surface of the large-diameter portion 42. And after irradiating the laser L so that the outer peripheral surface part of the 2nd joint 82 may fuse | melt simultaneously, irradiation is stopped. Thereby, as shown in FIG. 4B, the stainless steel constituting the large-diameter portion 42 of the valve seat member 40, the nickel constituting the tube member 96, and the copper constituting the second joint 82 are respectively melted and mixed. After being combined, the second welded portion 92 is formed over the entire inner peripheral surface of the large-diameter portion 42 between the valve seat member 40 and the second joint 82. The valve seat member 40 and the second joint 82 are joined to each other by the second welded portion 92.

(2: Assembly process)
Next, after inserting the plunger 20 holding the valve body 30 into the plunger tube 10, a part of the coil spring 60 is accommodated in the coil spring accommodating portion 22 of the plunger 20. Then, a part of the suction element 50 is inserted into the upper end portion of the plunger tube 10, and the peripheral edge of the upper end portion of the plunger tube 10 and the portion in contact with the peripheral edge of the outer peripheral surface of the suction element 50 are joined and attached to each other by laser welding. . Then, the plunger tube 10 and the attractor 50 fixed to each other are inserted inside the coil body 71 of the electromagnetic coil 70, and the outer box 72 of the electromagnetic coil 70 is fixed to the attractor 50 with screws N by screwing. Install. The solenoid valve 1 is completed through these welding steps and assembly steps in sequence.

As described above, according to the electromagnetic valve 1 of the present embodiment, the communication hole 14 is formed in which the peripheral wall portion 12 of the plunger tube 10 communicates with the inside and outside of the plunger tube 10 and one end of the first joint 81 is fitted. It has only one plane part 13. And the 1st coupling 81 is joined to the plane part 13 by laser welding in the state by which the one end part was fitted by the communication hole 14 corresponding to it. Since it did in this way, since the communicating hole 14 with which the one end part of the 1st coupling 81 is fitted is provided in the plane part 13, the periphery of the communicating hole 14 is contained in one plane. Therefore, when one end portion of the first joint 81 is fitted into the communication hole 14, the peripheral edge S of the joint portion where the outer peripheral surface of the first joint and the inner peripheral surface of the communication hole 14 come into contact with each other is also included in one plane. Therefore, in welding, it is not necessary to move the laser in the three-dimensional direction in order to focus the laser beam, and it is only necessary to move the laser in the two-dimensional direction along the one plane after focusing the laser beam once. . Thereby, the 1st coupling 81 can be joined more easily to the surrounding wall part 12 of the cylindrical plunger tube 10 using laser welding.

Further, in the solenoid valve 1, between the plunger tube 10 and the first joint 81 and between the valve seat member 40 and the second joint 82, stainless steel, copper, and nickel mixed with each other by welding. A first welded portion 91 and a second welded portion 92, each formed by melting and solidifying by laser welding, are provided, and the plunger tube 10 and the first joint 81 are joined to each other via the first welded portion 91, and the valve The seat member 40 and the second joint 82 are joined to each other via the second welded portion 92. Since stainless steel and copper are mixed with each other by interposing nickel mixed with stainless steel and copper by welding compared to a configuration in which stainless steel and copper are directly welded, stainless steel and copper are mixed. It is possible to suppress solidification in a separated state without matching. Therefore, poor welding such as internal cracks that occur when stainless steel and copper are not mixed can be suppressed. Thereby, the joining location by welding of the plunger tube 10 and the valve seat member 40 made of stainless steel and the first joint 81 and the second joint 82 made of copper by the first welded portion 91 and the second welded portion 92 formed by laser welding. The joint strength can be effectively secured.

As mentioned above, although this invention was mentioned and mentioned with preferable embodiment, the valve apparatus of this invention is not limited to the structure of these embodiment.

For example, in the above-described embodiment, one planar portion 13 is provided on the peripheral wall portion 12 of the cylindrical plunger tube 10, and one communication hole 14 is formed in the planar portion 13. It is not limited to. Here, the structure of the modification of the solenoid valve of embodiment mentioned above to FIG. 5 (a), (b) is shown. FIG. 5A is a perspective view showing a configuration of a first modification of the solenoid valve of FIG. 1 (a configuration in which a plurality of communication holes are formed in one plane portion), and FIG. It is a perspective view which shows the structure of the 2nd modification of this solenoid valve (structure by which one communicating hole was formed in each of several plane parts).

For example, as shown in FIG. 5A, the planar wall 13A of the plunger tube 10A is provided with one flat surface portion 13A, and a plurality of

communication holes

14A and 14B are formed in the flat surface portion 13A. It is good also as the solenoid valve 2 which has the structure by which

coupling

81A, 81B was fitted by each of 14A, 14B, and was joined by laser welding. That is, one planar portion 13A in which the peripheral wall portion 12A of the plunger tube 10A communicates the inside and outside of the plunger tube 10A and a plurality of

communication holes

14A, 14B into which one end portions of the plurality of

joints

81A, 81B are fitted is formed. have. A plurality of

joints

81A and 81B are joined to the plane portion 13A by laser welding in a state in which one end is fitted to the

corresponding communication holes

14A and 14B. Such a configuration may be adopted.

Alternatively, for example, as shown in FIG. 5B, the peripheral wall portion 12C of the plunger tube 10C is provided with a plurality of

plane portions

13C, 13D, and

communication holes

14C, 14D are formed in the

respective plane portions

13C, 14D. , 14D may be a solenoid valve 3 having a configuration in which joints 81C and 81D are fitted and joined by laser welding. In other words, the peripheral wall portion 12C of the plunger tube 10C communicates with the inside and outside of the plunger tube 10C, and a plurality of

communication holes

14C and 14D into which one end portions of the plurality of

joints

81C and 81D are fitted are distributed. It has

plane portions

13C and 13D. A plurality of

joints

81C and 81D are joined to the plurality of

planar portions

13C and 13D by laser welding in a state where one end is fitted to the

corresponding communication holes

14C and 14D, respectively. Such a configuration may be adopted.

Even with the configuration as shown in FIGS. 5A and 5B, the same effects as those of the above-described embodiment can be obtained. That is, the communication hole into which one end of the joint is fitted is provided in the flat surface portion, so that the peripheral edge of the communication hole is included in one flat surface. For this reason, when one end of the joint is fitted into the communication hole, the peripheral edge of the joint where the outer peripheral surface of the joint and the inner peripheral surface of the communication hole come into contact with each other is included in one plane. There is no need to move the laser in the three-dimensional direction in order to adjust the focus, and it is only necessary to move the laser in the two-dimensional direction along the one plane after focusing the laser beam once. Thereby, a joint can be more easily joined to the surrounding wall part of a cylindrical plunger tube using laser welding.

Alternatively, for example, as shown in FIG. 6A, the plunger tube 10E includes a peripheral wall portion 12E formed in a rectangular tube shape, and a ridge line R extending in the axial direction (vertical direction in the drawing) of the peripheral wall portion 12E. Is provided with a plane portion 13E so as to be divided (divided) in the axial direction, and a joint 81E is fitted into a communication hole 14E formed in the plane portion 13E and joined by laser welding. Is considered as a reference example. In other words, the peripheral wall portion of the square tube-shaped plunger tube 10E is 12E, and one flat portion 13E in which one communication hole 14E is formed which communicates the inside and outside of the plunger tube 10E and one end of one joint 81E is fitted. have. The planar portion 13E is arranged so that the ridgeline R in the peripheral wall portion 12E of the plunger tube 10E is arranged in the extending direction of the ridgeline R, and one end of the joint 81E is fitted into the corresponding communication hole 14E. In the state, it is joined to the flat portion 13E by laser welding.

Alternatively, for example, as illustrated in FIG. 6B, the plunger tube 10 </ b> F includes a peripheral wall portion 12 </ b> F formed in a rectangular tube shape, and a ridgeline R extending in the axial direction (vertical direction in the drawing) of the peripheral wall portion 12 </ b> F. Are arranged in the axial direction, and a solenoid valve 5 having a configuration in which joints 81F and 81G are fitted into

communication holes

14F and 14G formed in the plane portion 13F and joined by laser welding. Is considered as a reference example. That is, the peripheral wall portion 12F of the plunger tube 10F communicates the inside and outside of the plunger tube 10F, and one planar portion 13F in which a plurality of

communication holes

14F and 14G are formed into which one end portions of the plurality of

joints

81F and 81G are fitted. have. The planar portion 13F is arranged so as to be aligned in the extending direction of the ridgeline R with respect to the ridgeline R in the peripheral wall portion 12F of the plunger tube 10F, and the plurality of

joints

81F and 81G include a plurality of communication holes 14F, It is joined to the flat portion 13F by laser welding with one end fitted to 14G.

Alternatively, for example, as shown in FIG. 6C, the plunger tube 10H includes a peripheral wall portion 12H formed in a rectangular tube shape, and a ridge line R extending in the axial direction (vertical direction in the drawing) of the peripheral wall portion 12H.

Plane portions

13H and 13J are provided so as to divide (separate) them in the axial direction, and

joints

81H and 81J are fitted into

communication holes

14H and 14J formed in the

plane portions

13H and 13J and joined by laser welding. A solenoid valve 6 having the above-described configuration is considered as a reference example. That is, the peripheral wall portion 12H of the plunger tube 10H communicates with the inside and outside of the plunger tube 10H, and a plurality of

communication holes

14H and 14J into which one end portions of the plurality of

joints

81H and 81J are fitted are distributed. It has

plane portions

13H and 13J. The plurality of

flat portions

13H and 13J are arranged so as to be aligned in the extending direction of the ridgeline R with respect to the ridgeline R in the peripheral wall portion 12H of the plunger tube 10H, and the plurality of

joints

81H and 81J are respectively connected to the plurality of communication portions. The

holes

14H and 14J are joined to the plurality of

flat portions

13H and 13J by laser welding in a state where one end is fitted.

6A to 6C can obtain the same effects as those of the above-described embodiment. That is, a communication hole in which a flat portion that is flattened by eliminating the ridgeline is disposed in a portion where the ridgeline in the peripheral wall portion of the plunger tube extends, and one end portion of the joint is fitted to the flat portion. Therefore, the peripheral edge of the communication hole is included in one plane. For this reason, when one end of the joint is fitted into the communication hole, the peripheral edge of the joint where the outer peripheral surface of the joint and the inner peripheral surface of the communication hole come into contact with each other is included in one plane. There is no need to move the laser in the three-dimensional direction in order to adjust the focus, and it is only necessary to move the laser in the two-dimensional direction along the one plane after focusing the laser beam once. Thereby, a joint can be more easily joined to the peripheral wall part of a square tube-shaped plunger tube using laser welding.

Further, in the above-described embodiment, the tube material made of nickel is used for welding of each joint, but is not limited to this. For example, when the plunger tube and valve seat member and each joint are made of the same kind of metal, such as a combination of metals that are unlikely to cause poor welding, the tube material as described above is not used. The plunger tube, the valve seat member, and each joint may be directly joined by laser welding.

In the above-described embodiment, the tube material, which is a metal material sandwiched between the plunger tube and the valve seat member and each joint, is made of nickel, but is not limited thereto. is not. As a material constituting such a metal material, any metal can be used as long as it is a metal that is mixed with stainless steel and copper by welding, and the type of the metal used as the material is arbitrary. As a material constituting the metal material, it is particularly preferable that one material selected from nickel, lithium, bismuth, gold and platinum is a main component (including more than 50% by weight). By using it, weldability can be improved and poor welding can be suppressed. Alternatively, phosphor copper brazing, silver brazing, or nickel brazing may be used as a material constituting the metal material. Phosphor copper brazing (JISZ3264) is a brazing material obtained by adding about 5% to 8% phosphorus to copper. Silver brazing (JISZ3261) is a brazing material containing silver, copper, and zinc in a high ratio, and cadmium, tin, nickel, and the like may be added depending on applications. Nickel brazing (JISZ3265) is a brazing material containing nickel as a main component, to which chromium, boron, silicon, or the like is added.

In the above-described embodiment, the first joint, the second joint, and the like are made of pure copper, but the present invention is not limited to this. As a material of such a piping member, copper or a copper alloy containing copper as a main component (including more than 50% by weight) may be used. The material of the piping member is particularly preferably one copper (including a copper alloy) selected from pure copper, oxygen-free copper, tough pitch copper, phosphorus deoxidized copper and aluminum bronze.

Moreover, in each embodiment mentioned above, the nickel plating layer or the nickel-type member melt-adhered to the location where it joins with the plunger tube or the valve seat member in outer peripheral surfaces, such as a 1st joint and a 2nd joint, by welding An adhesion part may be provided. By doing in this way, the weldability of a valve housing and a valve seat member, and each joint can further be improved.

It should be noted that the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. Although the above-described solenoid valve has been shown as an example of an embodiment of the present invention, the present invention can be applied to various other types of valve devices such as a throttle valve device, a flow path switching valve, a check valve, a pressure adjustment valve, and the like. Applicable. That is, those skilled in the art can implement various modifications in accordance with conventionally known knowledge without departing from the scope of the present invention. Of course, such modifications are included in the scope of the present invention as long as the configuration of the valve device of the present invention is provided.

1-6 Solenoid valve (valve device)
10, 10A, 10C, 10E, 10F, 10H Plunger tube (valve housing)
11

Valve chamber

12, 12A, 12C, 12E, 12F, 12H

Peripheral wall portion

13, 13A, 13C, 13D, 13E, 13F, 13H,

13J Planar portion

14, 14A-14H Communication hole 20 Plunger 30 Valve body 40 Valve seat member 50 Suction element 60 Coil spring 70 Electromagnetic coil 81 First joint (piping member)
81A to 81H Fitting (Piping member)
82 Second joint 91 First welded portion 92 Second welded

portion

95, 96 Tube material

Claims

In a valve device comprising a cylindrical valve housing, and one or a plurality of piping members joined to a peripheral wall portion of the valve housing,
The peripheral wall portion of the valve housing has one plane portion in which one or a plurality of communication holes are formed to communicate with the inside and outside of the valve housing and to which one end portions of the one or more piping members are fitted. And
The valve device is characterized in that the one or more piping members are joined to the planar portion by laser welding in a state where one end is fitted to the corresponding one or more communication holes. .
In a valve device comprising a cylindrical valve housing and a plurality of piping members joined to a peripheral wall portion of the valve housing,
The peripheral wall portion of the valve housing has a plurality of planar portions formed by distributing a plurality of communication holes that communicate with the inside and the outside of the valve housing and are fitted with one end portions of the plurality of piping members,
The valve device, wherein the plurality of piping members are joined to the plurality of planar portions by laser welding in a state where one end portions are fitted into the plurality of communication holes corresponding to the plurality of piping members, respectively.