JP2018017244A - Valve and process of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assure strength of a body at a valve, reduce its manufacturing cost, make its weight into a light one and improve its flow characteristic.SOLUTION: A body 16 of a valve 10 is constituted in such a way that a tubular body 26 made from a pipe may cross with a base body 24 formed through a bulge forming process, both of them are fixed to each other through welding and at the same time a cylindrical holding member 28 is inserted into an opening part 32 opened at an upper part of the base body 24 and fixed by welding. Then, the inner peripheral surfaces at both ends of the tubular body 26 are processed with threads to form a first port 12 and a second port 14, and a nut member 62 of a frame 18 having a solenoid part 20 stored therein is engaged with a thread part 50 formed at the inner peripheral surface of the holding member 28 and connected to the body 16.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a valve that is connected to a pipe or the like through which a pressure fluid flows, and that can switch the flow state of the pressure fluid, and a manufacturing method thereof.

  Conventionally, a valve that is connected to a fluid passage through which a pressure fluid flows and controls the flow state of the pressure fluid has been used. For example, as disclosed in Patent Document 1, the valve deforms the tubular body by pushing a die material and a stamp member arranged so as to sandwich the tubular body so as to approach each other, and a rib is formed at the center. Forming a body with Further, a circular flat portion formed so as to face the rib in the body is cut out and a flange plate is mounted. The flange plate is provided with a valve drive device including a solenoid portion with a diaphragm functioning as a valve body interposed therebetween.

Japanese Patent No. 3691069

  However, in the valve according to Patent Document 1 described above, for example, a flow path through which a pressure fluid flows is configured by laminating a plurality of plates on the upper part of the body. However, there is a problem that the manufacturing cost and weight increase. In addition, the flow path structure through which fluid flows in the body becomes complicated, leading to a decrease in flow rate characteristics.

  Further, since the body is plastically deformed to form a rib in the center, the strength of the body is reduced, and the end of the press-molded body is thinned by a screw, resulting in insufficient strength. There are concerns.

  The present invention has been made in consideration of the above-described problems, and provides a valve capable of ensuring the strength of the body, reducing the manufacturing cost and reducing the weight, and improving the flow characteristics, and a method for manufacturing the same. The purpose is to do.

In order to achieve the above object, the present invention provides a valve having a body having a flow path through which a pressure fluid flows, a valve body for switching the communication state of the flow path, and a drive means for opening and closing the valve body. In
The body has a cylindrical main body,
A tubular body connected to the main body and having a flat portion formed substantially parallel to the axial direction on the outer peripheral surface and a flow path formed therein;
Consists of
A threaded port is formed at the end of the tube, a flow hole through which the pressure fluid can flow is formed in the flat part, and a valve body is slidably provided in the flow hole. The passage is provided with a partitioning portion at a position between the upstream-side circulation hole and the downstream-side circulation hole.

  According to the present invention, the body constituting the valve includes a cylindrical main body portion, a flat portion connected to the main body portion and formed substantially parallel to the axial direction on the outer peripheral surface, and a flow path formed inside. The pipe body has a threaded port formed at the end of the pipe body, a flow hole through which the pressure fluid can flow is formed in the flat part, and a valve body is seated in the flow hole. The partition is provided in the flow path at a position between the upstream flow hole and the downstream flow hole.

  Therefore, since the body can be easily configured by connecting the tubular main body portion and the tube body, the number of parts can be reduced as compared with the valve according to the prior art, and accordingly, the material cost, etc. The manufacturing cost can be reduced and the weight can be reduced. In addition, by providing a port with a screw in a tube that is separate from the main body, strength reduction is prevented compared to conventional valves in which the body main body made of pressed material with a substantially constant thickness is threaded. In addition, since a further decrease in strength due to deformation of the tubular body is avoided by providing a partition portion inside the tubular body, a predetermined strength can be ensured.

  Furthermore, the internal volume can be increased by making the thickness of the body uniform and thin, and the flow path of the pressure fluid can be made simple so that the flow characteristics of the pressure fluid can be improved. Can do.

  That is, as compared with the valve according to the prior art, the strength of the body can be secured, the manufacturing cost can be reduced and the weight can be reduced, and the flow rate characteristic can be improved.

  The main body may be provided with a holding member having a connecting portion that can connect the driving means.

  Further, the flow hole is composed of an introduction hole into which the pressure fluid is introduced and a lead-out hole formed on the downstream side of the introduction hole and from which the pressure fluid is led out, and it is preferable to provide at least one introduction hole.

  Furthermore, the drive means may be a solenoid portion having a coil that is excited under an energization action and a movable iron core that moves in the axial direction under the excitation action of the coil.

The present invention is also a manufacturing method for manufacturing a valve having a body having a flow path through which a pressure fluid flows, a valve body for switching the flow state of the flow path, and a driving means for opening and closing the valve body. And
A step of inserting a tubular body through the insertion hole and fixing by welding to the body portion of the body formed by press molding and having a set of insertion holes; and
With the holding member having the threaded portion formed on the inner peripheral surface thereof inserted into the opening of the main body portion and the end of the holding member in contact with the flat portion formed on the outer peripheral surface of the tubular body Fixing by welding;
It is characterized by having.

  According to the present invention, the following effects can be obtained.

  That is, since the body constituting the valve can be easily configured by connecting the cylindrical main body portion and the tube body, the number of parts can be reduced as compared with the valve according to the prior art. Thus, it is possible to reduce manufacturing costs such as material costs and reduce weight. Further, by providing a port with a screw in a pipe body different from the main body part and providing a partition part inside the pipe body, a predetermined strength can be secured, and the internal volume of the body can be increased to increase the pressure fluid It is possible to improve the flow rate characteristics of the pressure fluid by making the flow path of this simple structure.

It is a whole sectional view of a valve concerning an embodiment of the invention. It is a disassembled perspective view of the valve | bulb shown in FIG. It is a disassembled sectional view of the body in the valve | bulb of FIG. It is a whole sectional view showing the state where the valve of Drawing 1 opened the valve under energization action.

  DESCRIPTION OF EMBODIMENTS Preferred embodiments of a valve and a method for manufacturing the same according to the present invention will be described below in detail with reference to the accompanying drawings. In FIG. 1, reference numeral 10 indicates a valve manufactured by the manufacturing method according to the embodiment of the present invention. In the following description, the case where the valve 10 is an electromagnetic valve that opens and closes the valve body 22 while energizing the solenoid unit 20 will be described.

  As shown in FIGS. 1 to 4, the valve 10 includes a body 16 having first and second ports 12 and 14 through which pressure fluid is supplied and exhausted, and a frame 18 provided on the upper portion of the body 16. And a valve body 22 that switches the communication state between the first and second ports 12 and 14 to each other under the excitation action of the solenoid unit 20.

  The body 16 is fitted into, for example, a base body 24 formed in a bottomed cylindrical shape, a tube body 26 connected so as to penetrate the inside of the base body 24, and an opening 32 of the base body 24. The holding member 28 is formed.

  For example, the base body 24 is formed in a bottomed cylindrical shape from a tube material made of a metal material, and a pair of insertion holes 30 through which the tube body 26 is inserted is formed on the outer peripheral surface thereof. The insertion hole 30 is formed in a position that opens in a direction orthogonal to the axial direction (arrow A direction) of the base body 24 (arrow B direction) and is symmetrical and straight with respect to the center of the base body 24.

  An opening 32 having a circular cross section is formed at one end along the axial direction (arrow A direction) of the base body 24, and a bottom 34 is provided at the other end.

  The tubular body 26 is made of, for example, a pipe having a substantially constant diameter and a predetermined length in the axial direction (arrow B direction), and a first port in which screws are engraved on the inner peripheral surface of one end and the other end. 12 and the second port 14 are respectively formed. Further, a substantially central portion along the axial direction (arrow B direction) of the tube body 26 has a flat portion 36 cut out in a flat shape so as to be recessed with respect to the outer peripheral surface, and the flat portion 36 is the tube. The body 26 is formed substantially in parallel with the axial direction (arrow B direction) and has a predetermined length along the axial direction and a substantially rectangular shape with a predetermined width in the width direction orthogonal to the axial direction (FIG. 2). reference).

  The flat portion 36 is formed with a predetermined flatness, for example, and a first introduction hole 38 is opened at a position on one end side (in the direction of the arrow B1) of the tube body 26, and a lead-out hole 40 is formed at a substantially central portion. And the second introduction hole 42 is opened at a position spaced apart from the first introduction hole 38 along the circumferential direction by a predetermined distance. The second introduction hole 42 opens on the outer peripheral surface of the tube body 26 where the flat portion 36 is not formed, and is formed with substantially the same opening area as the first introduction hole 38.

  A valve seat portion 44 that protrudes toward the solenoid portion 20 (in the direction of the arrow A1) and on which the valve body 22 can be seated is formed on the outer edge portion of the lead-out hole 40.

  On the other hand, a partition plate 46 is provided in the tube body 26 at a position between the first introduction hole 38 and the lead-out hole 40, and the partition plate 46 has a disk shape corresponding to the cross-sectional shape of the tube body 26. The tube 26 is formed so as to be orthogonal to the axis of the tube 26 and to close the inside of the tube 26, and is fixed by welding. That is, the inside of the tube body 26 is divided into two by the partition plate 46.

  The tube body 26 is inserted into a pair of insertion holes 30 in the base body 24, and one end portion and the other end portion protrude outward by a predetermined length, and include a first introduction hole 38 and a lead-out hole 40. The portion 36 is fixed by welding in a state of being disposed so as to face the opening 32 of the base body 24. That is, the tube body 26 is fixed in a state in which the first and second ports 12 and 14 protrude from the base body 24.

  For example, the holding member 28 is formed in a cylindrical shape by press-molding a metal material, and a bent portion 48 that is folded back on the inner peripheral side is formed at one end thereof, and the other end side (arrow) On the inner peripheral surface which is the (A1 direction), there is a screw portion 50 in which a screw is engraved. The holding member 28 is inserted into the opening 32 of the base body 24 and is fixed by welding in a state where the outer peripheral surface abuts and the bent portion 48 abuts the flat portion 36 of the tube body 26. The holding member 28 does not protrude from the opening 32 of the body 16 to the outside.

  In addition, an annular O-ring 52 is provided inside the bent portion 48 and is in contact with a diameter-expanded portion of a tube 58 described later.

  The solenoid unit 20 includes a frame 18, a bobbin 54 provided inside the frame 18 around which a coil 53 is wound, a fixed iron core 56 held with respect to the frame 18, and coaxially with the fixed iron core 56. It comprises a tube 58 provided and a movable iron core 60 movably disposed inside the tube 58.

  The frame 18 is formed, for example, from a metal material so as to surround the upper end portion and the lower end portion of the bobbin 54 and has a U-shaped cross section, and the opening portion 32 is disposed on the body 16 side (arrow A2 direction). . A nut member 62 is attached to the lower end portion of the frame 18, and the nut member 62 has a screw 64 engraved on the outer peripheral surface of the cylindrical portion protruding downward (arrow A2 direction).

  The bobbin 54 is formed of, for example, a resin material, and the coil 53 is wound and held in a recess recessed inward on the outer peripheral surface thereof. An O-ring 66 is provided at the upper end of the bobbin 54 via an annular groove and abuts against the inner wall surface of the frame 18. On the other hand, a terminal block 68 is provided at the lower part of the bobbin 54 and is electrically connected to the coil 53 and a lead wire 70 provided outside the frame 18. As a result, current is supplied from the lead wire 70 to the coil 53 through the terminal block 68.

  Further, an O-ring 72 is provided on the outer peripheral surface of the terminal block 68 through an annular groove so as to come into contact with the inner wall surface of the frame 18, and the lower portion of the terminal block 68 covers the inner peripheral side and the lower portion thereof. A cylindrical sleeve 74 is provided. The sleeve 74 is formed with an inner diameter substantially the same as that of the bobbin 54, and a nut member 62 is provided on the lower surface thereof so as to be spaced apart by a predetermined distance.

  The fixed iron core 56 is formed in a substantially cylindrical shape from, for example, a metal material such as pure iron, is inserted into the bobbin 54, and a protrusion 76 formed at the center of the upper end is formed at the center of the frame 18. It is fixed by a fastening bolt 82 that is screwed into the screw hole 80 while being inserted through the hole 78. A plate 84 is fastened to the upper portion of the frame 18 by fastening bolts 82. Accordingly, the fixed iron core 56 is held coaxially inside the frame 18.

  A spring hole 86 that is recessed in the axial direction (in the direction of the arrow A1) is formed in the lower end central portion of the fixed iron core 56. A spring guide 88 is inserted into the spring hole 86, and the spring guide 88 is inserted therein. The one end side of the spring 90 supported by is accommodated. The spring 90 is made of, for example, a coil spring, and the other end abuts against the end surface of the movable iron core 60 and urges the movable iron core 60 in a direction away from the fixed iron core 56 (arrow A2 direction).

  The tube 58 is formed, for example, in a cylindrical shape from a magnetic material, and is provided on the inner peripheral side of the bobbin 54. The movable core 60 is movably accommodated in the tube 58, and the distal end portion is on the outer peripheral side of the fixed core 56. Fixed by welding or the like. In addition, the lower end portion of the tube 58 is expanded radially outward to cover the lower end portion of the nut member 62. In addition to the bobbin 54, a sleeve 74 and a nut member 62 are in contact with the outer peripheral surface of the tube 58. The tube 58 is formed, for example, by press-molding a plate material having a substantially constant thickness.

  As shown in FIGS. 1 and 2, the solenoid unit 20 described above includes a bobbin 54 including a coil 53, a sleeve 74, and a terminal block 68 housed in the frame 18, and a lead wire connected to the terminal block 68. 70 is taken out to form a coil assembly 92, and includes a fixed iron core 56, a tube 58 connected to the fixed iron core 56, and a nut member 62 fixed to an enlarged portion of the tube 58. Is configured.

  And the solenoid part 20 is made to orthogonally cross the axial direction of the pipe body 26 by screwing the nut member 62 with which the lower end part of the flame | frame 18 was mounted | worn with the screw part 50 of the holding member 28 which comprises the body 16. FIG. The solenoid unit 20 is connected to the upper portion of the body 16.

  The valve body 22 is made of, for example, an elastic material and is connected to a lower end portion of the movable iron core 60 via a holder 96. The holder 96 is formed in a cylindrical shape so as to cover a part of the movable iron core 60 and the outer peripheral side of the valve body 22. The valve body 22 has a flat end surface facing the body 16, moves integrally with the movable iron core 60 in the axial direction (arrow A direction), and moves toward the body 16 side (arrow A2 direction). At this time, the flow of the pressure fluid through the outlet hole 40 is blocked by seating on the valve seat portion 44 so as to close the outlet hole 40.

  The valve 10 according to the embodiment of the present invention is basically configured as described above. Next, the case where the body 16 constituting the valve 10 is manufactured will be described.

  First, the base body 24 constituting the body 16 is formed by bulge molding in which a liquid is injected into a tubular pipe set in a mold and is deformed into a desired shape by applying pressure. 24, after bulge forming is performed, an opening 32 is formed upward (in the direction of the arrow A1), and a pair of insertion holes 30 are formed on the outer peripheral surface on the side.

  The tube body 26 is inserted from the one insertion hole 30 to the other insertion hole 30, arranged so that both ends protrude from the outer peripheral surface by a predetermined length, and the flat portion 36 faces the opening 32. It shall be in the state arrange | positioned so that it may become a position. That is, the tube body 26 is disposed so as to be orthogonal to the axis of the base body 24. And each contact site | part of the base body 24 and the pipe body 26 is mutually fixed by welding.

  Next, the holding member 28 is inserted into the opening 32 from above, and the contact portions are fixed by welding with the bent portion 48 in contact with the flat portion 36 of the tube body 26. Thereby, the pipe body 26 and the holding member 28 are fixed to the base body 24 by welding, and the body 16 is configured.

  On the other hand, after the tube assembly 94 is inserted into the coil assembly 92 and the fixing iron core 56 is fixed to the frame 18 together with the plate 84 by the fastening bolt 82 inserted through the hole 78 of the frame 18, The movable iron core 60 and the valve body 22 are inserted into the tube assembly 94. A spring 90 and a spring guide 88 are disposed between the movable iron core 60 and the fixed iron core 56.

  The nut member 62 provided at the lower end of the tube assembly 94 is screwed into the holding member 28 of the body 16 manufactured as described above, so that the frame 18 and the upper portion of the body 16 Solenoid part 20 is connected and manufacture of valve 10 is completed.

  Next, the operation of the valve 10 manufactured as described above will be described. In FIG. 1, the coil 53 is not energized, and the movable iron core 60 is moved toward the valve seat 44 (in the direction of the arrow A2) by the elastic force of the spring 90. 22 shows that the lead-out hole 40 is closed by being seated on the valve seat portion 44 and the communication between the first port 12 and the second port 14 is blocked.

  In such an off state, a power source (not shown) is energized and energized from the terminal block 68 to the coil 53 through the lead wire 70, thereby exciting the coil 53. It is attracted to the fixed iron core 56 side (arrow A1 direction) against the elastic force.

  As a result, the valve body 22 is separated from the valve seat portion 44 and the lead-out hole 40 is opened, so that the first and second introduction holes 38 and 42 and the lead-out hole 40 communicate with each other. As a result, the pressure fluid supplied from the first port 12 flows from the first and second introduction holes 38 and 42 to the inside of the base body 24 on the upstream side (in the direction of arrow B1) of the partition plate 46, and from the flow outlet hole 40. The flow again flows to the downstream side (in the direction of arrow B <b> 2) of the partition plate 46 in the tube body 26 and is led out from the second port 14.

  On the other hand, the energization of the coil 53 is stopped, and the solenoid unit 20 including the coil 53 is de-energized, whereby the attractive force of the fixed core 56 with respect to the movable iron core 60 is deenergized. It is pressed to the valve seat 44 side (arrow A2 direction) by the elastic force. When the valve body 22 is seated on the valve seat portion 44, the lead-out hole 40 is closed again, and the communication between the first port 12 and the second port 14 through the lead-out hole 40 is blocked. Become.

  As described above, in the present embodiment, the body 16 is constituted by the base body 24 made of bulge molding, the holding member 28 made of press molding, and the pipe body 26, so that the parts are compared with the valve according to the prior art. The number of points can be reduced, and the thickness of the body 16 can be made uniform, so that waste of materials can be reduced, and manufacturing costs such as material costs and processing costs can be reduced and weight can be reduced. Become.

  Further, the internal volume can be increased by making the thickness of the body 16 uniform and thin, and the flow path of the pressure fluid can be made simple. Can be improved.

  Further, the pipe body 26 constituting the body 16 is made of a pipe or the like, and only the threading for forming the first and second ports 12 and 14 at both ends thereof is performed, so that the strength is lowered. And high strength is maintained.

  Furthermore, since the flat portion 36 of the tubular body 26 has a flatness, the first introduction hole 38 and the outlet hole 40 formed in the flat portion 36 can be formed with high accuracy, and the valve Since the valve seat portion 44 on which the body 22 is seated can be formed with high precision, the flow path can be opened and closed by the valve body 22 with high precision.

  In the above description, the case where the valve 10 is an electromagnetic valve having the solenoid unit 20 has been described. However, the present invention is not limited to this. For example, the valve body 22 is opened and closed under the action of supplying pressure fluid. An air operation type valve may be used.

  Further, in the above-described embodiment, the case where the pipe body 26 and the partition plate 46 are configured separately and fixed inside by welding is not limited to this. The partition part may be integrally formed inside.

  Furthermore, the valve and the manufacturing method thereof according to the present invention are not limited to the above-described embodiments, and various configurations can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Valve 16 ... Body 18 ... Frame 20 ... Solenoid part 22 ... Valve body 24 ... Base body 26 ... Tube 28 ... Holding member 30 ... Insertion hole 32 ... Opening part 36 ... Flat part 38 ... First introduction hole 40 ... Derivation Hole 42 ... Second introduction hole 44 ... Valve seat 46 ... Partition plate 56 ... Fixed iron core 60 ... Movable iron core 62 ... Nut member 92 ... Coil assembly 94 ... Tube assembly

Claims (5)

In a valve having a body having a flow path through which a pressure fluid flows, a valve body that switches a communication state of the flow path, and a drive unit that opens and closes the valve body,
The body includes a cylindrical main body,
A tubular body connected to the main body portion and having a flat portion formed substantially parallel to the axial direction on the outer peripheral surface and the flow path formed inside;
Consists of
A threaded port is formed at the end of the tube body, a flow hole through which the pressure fluid can flow is formed in the flat part, and the valve body can be seated in the flow hole. The valve is characterized in that a partition portion is provided at a position between the upstream flow hole and the downstream flow hole in the flow path. The valve of claim 1,
The main body is provided with a holding member having a connecting part capable of connecting the driving means. The valve according to claim 1 or 2,
The flow hole includes an introduction hole into which the pressure fluid is introduced;
A lead-out hole formed downstream of the introduction hole and through which the pressure fluid is led out;
Consists of
A valve, wherein at least one introduction hole is provided. The valve according to any one of claims 1 to 3,
2. The valve according to claim 1, wherein the driving means is a solenoid part having a coil excited under an energizing action and a movable iron core moving in the axial direction under the exciting action of the coil. A manufacturing method for manufacturing a valve having a body having a flow path through which a pressure fluid flows, a valve body that switches a flow state of the flow path, and a drive unit that opens and closes the valve body,
A step of inserting a tubular body through the insertion hole and fixing it by welding to the body portion of the body formed by press molding and having a set of insertion holes; and
With respect to the opening of the main body, a holding member having a threaded portion is inserted on the inner peripheral surface, and the end of the holding member is brought into contact with a flat portion formed on the outer peripheral surface of the tubular body. Fixing by welding in a state of
A method for manufacturing a valve, comprising:

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