JP2022010083A - Open/close valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an open/close valve capable of effectively suppressing valve leakage.

SOLUTION: An open/close valve 1 has a valve body 10, a seat member 20 that is adhered to one end portion of the valve body 10, a cap 30 that is disposed on the other end portion side of the valve body 10, and a suction element 40 that is disposed so as to project from one end portion of the cap 30. At the other end portion of the valve body 10, a guide portion 13 is provided, into which the suction element 40 is inserted, and with which an outer peripheral surface of the suction element 40 contacts to regulate the inclination of the cap 30 with respect to the valve body 10. The valve body 10 is adhered to the cap 30 by welding. An outer diameter of the suction element 40 is the same as an inner diameter of the guide portion 13. An outer peripheral surface of the suction element 40 contacts with an inner peripheral surface of the guide portion 13.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to an on-off valve and a method for assembling the on-off valve.

Patent Document 1 discloses a solenoid valve as an example of a conventional on-off valve. The solenoid valve of Patent Document 1 has a cylindrical valve body whose upper end is closed. An electromagnetic coil is arranged on the outer circumference of the valve body. Inside the valve body, a suction element, a plunger, a rod-shaped valve body connected to the plunger, and a valve opening spring arranged between the suction element and the plunger are provided. Further, the solenoid valve has a seat member provided with a valve seat. The seat member is fixed to the lower end of the valve body by welding.

Japanese Unexamined Patent Publication No. 2003-97757

In the above-mentioned assembly of the solenoid valve, the first conduit (copper pipe on the inlet side) is brazed to the valve body, and the second conduit (copper pipe on the outlet side) is brazed to the seat member. Then, after arranging the suction element, the plunger, the valve body and the valve opening spring inside the valve body, the seat member is fixed to the valve body by welding. Therefore, if the seat member is displaced and fixed with respect to the valve body during welding, the valve seat may also be displaced and valve leakage may occur. Then, after welding the seat member to the valve body, the valve seat could not be adjusted. Therefore, the present inventors have created a configuration in which a portion of the valve body in which the valve body or the like is arranged is divided as a cap. In this configuration, after the seat member is fixed to one end of the tubular valve body, the cap on which the valve body or the like is arranged is fixed to the other end of the valve body. However, when the cap is fixed to the valve body, the cap tilts with respect to the valve body, and the valve body may tilt and come into contact with the valve seat. Further, in the above-mentioned solenoid valve, a copper pipe is brazed separately to the valve body and the seat member, so that two brazing steps are required.

Therefore, an object of the present invention is to provide an on-off valve capable of effectively suppressing valve leakage and a method for assembling the on-off valve.

In order to achieve the above object, the method of assembling the on-off valve according to one aspect of the present invention includes a tubular valve body, a seat member fixed to one end of the valve body, and the other of the valve body. It is a method of assembling an on-off valve having a cap arranged on the end side of the cap and a valve body arranged so as to be able to advance and retreat with respect to the valve seat of the seat member, and protrudes from one end of the cap. The connecting portion is arranged so as to be provided, and the other end portion of the valve body is provided with a guide portion that regulates the inclination of the cap with respect to the valve body by contacting the outer peripheral surface of the connecting portion. It is characterized in that the connecting portion is inserted while sliding on the guide portion.

According to the present invention, the connecting portion is arranged so as to protrude from one end of the cap, and the outer peripheral surface of the connecting portion is in contact with the other end of the valve body to regulate the inclination of the cap with respect to the valve body. A guide section is provided. Then, the connecting portion is inserted while sliding on the guide portion. Since this is done, it is possible to prevent the cap from tilting with respect to the valve body. As a result, the valve body can be appropriately seated on the valve seat when the cap is configured to support the valve body so as to be able to move forward and backward with respect to the valve seat. Therefore, valve leakage can be effectively suppressed.

In the present invention, after the seat member is fixed to the valve body, an adjusting jig is inserted into the valve body from the guide portion to adjust the valve seat, and the connecting portion is inserted into the guide portion. , The valve body and the cap or the connecting portion are fixed by welding. By doing so, after the seat member is fixed to one end of the valve body, the adjustment jig is inserted from the guide part of the valve body to adjust the valve seat, so that the valve body is suitable for the valve seat. Can be seated in. Therefore, valve leakage can be suppressed more effectively.

In the present invention, the guide portion is provided so as to position the adjustment jig with respect to the valve body and guide the insertion of the adjustment jig into the valve body, and the valve body is provided with the guide portion. After fixing the seat member, the adjusting jig is inserted into the guide portion to position the adjusting jig with respect to the valve body, and the guide portion guides the insertion of the adjusting jig. It is preferable to adjust the valve seat by pressing the adjusting jig. By doing so, the adjusting jig can be appropriately inserted into the valve body, and the valve body can be appropriately seated by the valve seat. Therefore, valve leakage can be suppressed more effectively.

In the present invention, the seat member may be brazed to the valve body, and at the same time, the first conduit may be brazed to the valve body and the second conduit may be brazed to the seat member. preferable. By doing so, the valve body, the seat member, the first conduit and the second conduit can be fixed by one brazing step. Therefore, the number of brazing steps can be reduced. Further, even if the valve seat is displaced or deformed due to the influence of high temperature during brazing, the valve seat is adjusted after that, so that the valve body can be appropriately seated on the valve seat.

In order to achieve the above object, the on-off valve according to another aspect of the present invention includes a tubular valve body, a seat member fixed to one end of the valve body, and the other of the valve body. An on-off valve having a cap arranged on the end side and a valve body arranged so as to be able to advance and retreat with respect to the valve seat of the seat member, and arranged so as to protrude from one end of the cap. It has an aspirator that is a connected portion, and the aspirator is inserted inward at the other end of the valve body, and the outer peripheral surface of the aspirator comes into contact with the suction element so that the cap is tilted with respect to the valve body. A guide portion is provided, and the valve body is fixed to the cap by welding.

According to the present invention, a suction element, which is a connecting portion arranged on the cap, is inserted inward at the other end of the valve body, and the outer peripheral surface of the suction element comes into contact with the suction element so that the cap is tilted with respect to the valve body. A guide section is provided to regulate. Since this is done, it is possible to prevent the cap from tilting with respect to the valve body. Therefore, in the case of a configuration in which the valve body is supported so as to be able to move forward and backward in the cap, the valve body can be appropriately seated on the valve seat, and valve leakage can be effectively suppressed.

In the present invention, the outer diameter of the suction element is the same as the inner diameter of the guide portion, and the outer peripheral surface of the suction element is in contact with the inner peripheral surface of the guide portion over the entire circumference. By doing so, the suction element and the guide portion are arranged coaxially, and it is possible to more effectively suppress the cap from tilting with respect to the valve body.

According to the present invention, valve leakage can be effectively suppressed.

It is a vertical sectional view of the on-off valve which concerns on 1st Embodiment of this invention. It is a figure explaining the assembly method of the on-off valve of FIG. 1 (brazing process). It is a figure explaining the assembling method of the on-off valve of FIG. 1 (valve seat adjustment step). It is a figure explaining the assembly method of the on-off valve of FIG. 1 (connecting process). It is a figure explaining the assembly method of the on-off valve of FIG. 1 (welding process). It is a vertical sectional view of the on-off valve which concerns on 2nd Embodiment of this invention. It is a vertical sectional view of the on-off valve which concerns on 3rd Embodiment of this invention. It is a vertical sectional view of the on-off valve which concerns on 4th Embodiment of this invention.

(First Example)
Hereinafter, the on-off valve according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 5. In the present specification, the on-off valve includes a valve device in which a small amount of refrigerant flows in a closed state.

FIG. 1 is a vertical sectional view of an on-off valve according to the first embodiment of the present invention.

The on-off valve 1 of the first embodiment is used, for example, as a dehumidifying valve (dry valve) that throttles the refrigerant during the dehumidifying operation of the air conditioner. The on-off valve 1 is a solenoid valve that drives a valve body by magnetic force. In addition to this, the on-off valve 1 may be an electric valve or the like that drives the valve body by the rotational force of the motor.

As shown in FIG. 1, the on-off valve 1 includes a valve body 10, a seat member 20, a cap 30, a suction element 40 as a connecting portion, a plunger 50, a valve body 60, and an electromagnetic coil 70. Have.

The valve main body 10 integrally includes a main body portion 11, a seat member mounting portion 12, and a guide portion 13. The main body 11 is formed in a cylindrical shape. The seat member mounting portion 12 is formed in a cylindrical shape having a larger diameter than the main body portion 11, and is continuously provided at the lower end portion of the main body portion 11. The guide portion 13 is formed in a cylindrical shape having a smaller diameter than the main body portion 11, and is connected to the upper end portion of the main body portion 11. Both ends of the valve body 10 are open. A valve chamber 14 is provided inside the valve body 10.

The seat member 20 integrally has a seat body 21 and a flange 22. The sheet body 21 is formed in a cylindrical shape. The flange 22 is formed in an annular shape and is continuously provided at the lower end of the seat body 21. Inside the seat body 21, a valve port 23 that opens into the valve chamber 14 is provided. A valve seat 24 surrounding the valve port 23 is provided on the inner edge of the upper end of the seat body 21. The valve seat 24 is an annular tapered surface whose diameter gradually decreases from the upper side to the lower side. The valve seat 24 is provided with a plurality of bleed grooves 25. The seat member 20 is fitted into the seat member mounting portion 12 (one end of the valve body 10) of the valve body 10, and the flange 22 is fixed to the seat member mounting portion 12 by brazing.

A first conduit 16 extending laterally is fixed to the main body 11 of the valve main body 10 by brazing. A second conduit 17 extending downward is fixed to the lower portion of the seat member 20 by brazing. The first conduit 16 is connected to the valve chamber 14. The second conduit 17 is connected to the valve port 23.

The cap 30 is formed in a cylindrical shape with the upper end closed. The cap 30 has a cylindrical portion 31 and a disk-shaped ceiling portion 32 connected to the upper end portion of the cylindrical portion 31. The cap 30 has the same inner diameter and the same outer diameter as the guide portion 13 of the valve body 10. The cap 30 is arranged on the guide portion 13 (the other end of the valve body 10) side of the valve body 10 so as to be coaxial with the valve body 10. The lower end portion 31a of the cylindrical portion 31 is fixed to the guide portion 13 of the valve body 10 by welding.

The attractor 40 is a fixed iron core magnetized by the electromagnetic coil 70. The suction element 40 is formed in a cylindrical shape. The suction element 40 is fixed to the cylindrical portion 31 of the cap 30. The suction element 40 is arranged so that its lower end portion 40a projects downward from the cylindrical portion 31. The lower end portion 40a of the suction element 40 is inserted into the guide portion 13. By inserting the lower end portion 40a of the suction element 40 into the guide portion 13, the suction element 40 functions as a connecting portion for connecting the cap 30 and the valve body 10.

The outer diameter of the suction element 40 is the same as the inner diameter of the guide portion 13 of the valve body 10 and the inner diameter of the cylindrical portion 31 of the cap 30. Therefore, the outer peripheral surface of the suction element 40 is in contact with the inner peripheral surface of the guide portion 13 and the inner peripheral surface of the cylindrical portion 31 over the entire circumference, and the valve body 10, the cap 30, and the suction element 40 are coaxially arranged. .. As a result, the suction element 40 regulates the cap 30 from tilting with respect to the valve body 10. The outer peripheral surface of the suction element 40 may be in contact with the inner peripheral surface of the guide portion 13 and the inner peripheral surface of the cylindrical portion 31 over substantially the entire circumference. This is because the suction element 40 can regulate the tilt of the cap 30 if the outer peripheral surface of the suction element 40 is in contact with these inner peripheral surfaces over substantially the entire circumference.

The plunger 50 is formed in a cylindrical shape and is arranged above the suction element 40 inside the cap 30. The plunger 50 is housed in the cap 30 so as to be movable in the vertical direction. The plunger 50 sandwiches a plunger spring 51, which is a compression coil spring, between the plunger 50 and the suction element 40. When the aspirator 40 is magnetized, the plunger 50 is attracted to the aspirator 40 and moves downward. When the magnetization of the attractor 40 is released, the plunger 50 is pushed by the plunger spring 51 and moves upward. The ceiling portion 32 of the cap 30 serves as a stopper that determines the upward movement limit (upper end position) of the plunger 50.

The valve body 60 has a rod-shaped body portion 61 and a valve body portion 62 connected to the lower end portion of the body portion 61. The body portion 61 is inserted through the suction element 40. The upper end of the body portion 61 is fixed to the plunger 50. The valve body 60 moves in the vertical direction together with the plunger 50. The valve body portion 62 is arranged in the valve chamber 14 so as to face the valve seat 24 in the vertical direction. That is, the valve body 60 is arranged so as to be able to advance and retreat with respect to the valve seat 24. The valve body portion 62 closes the valve port 23 (valve closed state) by coming into contact with (sit) the valve seat 24. The valve body portion 62 opens the valve port 23 by moving away from the valve seat 24 (valve open state).

The valve body 10, the seat member 20, the cap 30, and the valve body 60 are made of metal such as stainless steel. The first conduit 16 and the second conduit 17 are made of a metal such as copper. Further, the valve body 10, the seat member 20, the cap 30, the suction element 40, the plunger 50, and the valve body 60 are arranged so that their respective axes coincide with the axis L (that is, coaxially).

The electromagnetic coil 70 is formed in a substantially cylindrical shape. The electromagnetic coil 70 is fitted with a cap 30 inside. A leaf spring-shaped stopper 71 having a hemispherical convex portion is provided on the upper portion of the electromagnetic coil 70. The electromagnetic coil 70 is fixed to the cap 30 by fitting the hemispherical convex portion of the stopper 71 into the hemispherical concave portion provided in the cap 30.

By energizing the electromagnetic coil 70, the attractor 40 and the plunger 50 are magnetized. By not energizing the electromagnetic coil 70, the magnetization between the attractor 40 and the plunger 50 is released. The electromagnetic coil 70 functions as a drive unit in cooperation with the attractor 40, the plunger 50 and the plunger spring 51.

Next, an example of the above-mentioned assembly method of the on-off valve 1 will be described with reference to FIGS. 2 to 5. 2 to 5 are cross-sectional views illustrating the method of assembling the on-off valve of FIG. 1, and show a brazing step, a valve seat adjusting step, a connecting step, and a welding step in order.

As shown in FIG. 2, the first conduit 16 and the seat member 20 are temporarily fastened to the valve body 10, and the second conduit 17 is temporarily fastened to the seat member 20. Then, after arranging the brazing material 80 at each brazing place, it is put into the furnace. After melting the brazing filler metal in the furnace, when the molten brazing filler metal hardens, each member is fixed.

The valve body 10 and the seat member 20 may be distorted due to the influence of high heat caused by being put into the furnace, and the valve seat 24 may be displaced or deformed. In this embodiment, as shown in FIG. 3, the adjusting jig 90 is inserted from the guide portion 13 of the valve body 10 to adjust the position and shape of the valve seat 24. The adjusting jig 90 is formed in a columnar shape having the same outer diameter as the inner diameter of the guide portion 13, and has an annular tapered surface 91 at the tip portion. As a result, when the adjusting jig 90 is inserted into the guide portion 13, the outer peripheral surface of the adjusting jig 90 comes into contact with the inner peripheral surface of the guide portion 13 over the entire circumference, and the adjusting jig 90 tilts with respect to the valve body 10. It is regulated and the adjusting jig 90 is positioned so as to be coaxially arranged with respect to the valve body 10. Further, the guide portion 13 guides the adjusting jig 90 to move along the axis L direction. Then, by pressing the tapered surface 91 against the valve seat 24, the position of the valve seat 24 is adjusted so that the valve seat 24 is coaxial with the guide portion 13 on the axis L, and the valve seat 24 has an appropriate shape. It will be adjusted.

Next, as shown in FIG. 4, the suction element 40, the plunger 50, the plunger spring 51 and the valve body 60 are housed in the cap 30. At this time, the lower end portion 40a of the suction element 40 is arranged so as to protrude downward from the lower end portion 31a of the cap 30. A punch is punched into the cylindrical portion 31 of the cap 30 to fix the suction element 40 to the cylindrical portion 31. Then, while sliding the outer peripheral surface of the lower end portion 40a of the suction element 40 to the inner peripheral surface of the guide portion 13, the lower end portion 40a is inserted into the guide portion 13, and the cylindrical portion 31 and the guide portion 13 of the cap 30 are inserted. Make a contact.

Then, as shown in FIG. 5, the lower end portion 31a of the cylindrical portion 31 of the cap 30 and the guide portion 13 are welded and fixed by using a welding tool 95. The cap 30 is inserted inside the electromagnetic coil 70, and the electromagnetic coil 70 is fixed by the stopper 71. In this way, the on-off valve 1 is completed.

From the above, according to the assembly method of the on-off valve 1 of the present embodiment, the adjusting jig 90 is inserted into the guide portion 13 of the valve main body 10 to adjust the valve seat 24 of the seat member 20 fixed to the valve main body 10. do. After that, the suction element 40 fixed to the cap 30 is inserted into the guide portion 13 of the valve body 10, and the valve body 10 and the cap 30 are fixed by welding. Since this is done, after the seat member 20 is fixed to the seat member mounting portion 12 of the valve body 10, the adjusting jig 90 is inserted from the opening of the guide portion 13 of the valve body 10 to adjust the valve seat. , The valve body 60 can be appropriately seated on the valve seat 24. Therefore, valve leakage can be effectively suppressed.

Further, the valve body 10 is provided with a guide portion 13 that regulates the inclination of the cap 30 with respect to the valve body 10 by contacting the outer peripheral surface of the suction element 40 fixed to the cap 30. Then, the suction element 40 is inserted while sliding on the guide portion 13. By doing so, it is possible to prevent the cap 30 from tilting with respect to the valve body 10. Thereby, in the case of the configuration in which the valve body 60 is supported by the cap 30 so as to be able to move forward and backward with respect to the valve seat 24, the valve body 60 can be appropriately seated on the valve seat 24. Therefore, valve leakage can be suppressed more effectively.

Further, the seat member 20 is fixed to the valve body 10 by brazing. At the same time, it is preferable that the first conduit 16 is brazed to the valve body 10 and the second conduit 17 is brazed to the seat member 20. By doing so, the valve body 10, the seat member 20, the first conduit 16 and the second conduit 17 can be fixed by one brazing step. Therefore, the number of brazing steps can be reduced. Further, even if the valve seat 24 is displaced or deformed due to the influence of high temperature during brazing, the valve seat 24 is adjusted after that, so that the valve body 60 can be appropriately seated on the valve seat 24.

(2nd to 4th Examples)
Hereinafter, the on-off valves according to the second to fourth embodiments of the present invention will be described with reference to FIGS. 6 to 8. In each of the examples described below, the same components as those in the first embodiment described above are designated by the same reference numerals, and detailed description thereof will be omitted.

6 to 8 are vertical cross-sectional views of the on-off valve according to the second to fourth embodiments of the present invention in order. In FIGS. 6 to 8, the description of the electromagnetic coil 70 is omitted.

The on-off valve 2 of the second embodiment shown in FIG. 6 has a valve main body 10A and a seat member 20A having different configurations from the valve main body 10 and the seat member 20 of the on-off valve 1 of the first embodiment.

The valve main body 10A has only the main body portion 11 and the guide portion 13, and the seat member mounting portion 12 is omitted. Further, the seat member 20A integrally has a seat main body 21 and a large diameter portion 26 formed in a cylindrical shape having a larger diameter than the seat main body 21 and connected to the lower end portion of the seat main body 21. The outer diameter of the large diameter portion 26 is the same as the inner diameter of the main body portion 11. When the seat member 20A is inserted from the lower end portion of the main body portion 11 of the valve main body 10A, the outer peripheral surface of the large diameter portion 26 abuts on the inner peripheral surface of the main body portion 11, and the valve main body 10A and the seat member 20A come into contact with each other. Arranged coaxially. Therefore, the valve seat 24 can be appropriately seated on the valve seat 24 by suppressing the displacement of the valve seat 24.

The on-off valve 3 of the third embodiment shown in FIG. 7 has an attractor 40A having a different configuration from the attractor 40 of the on-off valve 1 of the first embodiment.

The outer diameter of the lower end portion 40a of the suction element 40A is the same as the inner diameter of the guide portion 13. The outer diameter of the upper end portion 40b of the suction element 40A is the same as the inner diameter of the cylindrical portion 31 of the cap 30. The outer diameter of the central portion 40c of the suction element 40A is the same as the outer diameter of the guide portion 13 and the cap 30. The lower end portion 40a of the suction element 40A is inserted into the guide portion 13, and the upper end portion 40b is inserted into the cap 30. The cap 30 and the guide portion 13 are fixed to the suction element 40A as a connecting portion by welding. By inserting the upper end portion 40b of the suction element 40A into the cap 30, the upper end portion 40b functions as a guide portion with respect to the cap 30. This makes it possible to further prevent the cap 30 from tilting with respect to the valve body 10.

The on-off valve 4 of the fourth embodiment shown in FIG. 8 has a guide portion 13A longer in the axis L direction than the guide portion 13 of the on-off valve 1 of the first embodiment, and the cap 30A shorter in the axis L direction than the cap 30. have.

The guide portion 13A houses a suction element 40, a plunger 50, a plunger spring 51, and a valve body 60. By hitting the guide portion 13A with a punch, the suction element 40 is fixed to the guide portion 13A. The cap 30A has a cylindrical connecting portion 33 extending downward from the lower end portion of the cylindrical portion 31. The connecting portion 33 is inserted into the guide portion 13A. The cap 30A is fixed to the guide portion 13A by welding. As a result, it is possible to further prevent the cap 30A from tilting with respect to the valve body 10.

The on-off valve 2 to the on-off valve 4 of the second embodiment to the fourth embodiment have the same function and effect as the on-off valve 1 of the first embodiment described above.

Although the embodiments of the present invention have been described above, the present invention is not limited to these examples. As long as the gist of the present invention is not contrary to the above-mentioned embodiments, those skilled in the art appropriately adding, deleting, or changing the design, or combining the features of the examples as appropriate are also present inventions. Is included in the range of.

1, 2, 3, 4 ... Open / close valve, 10, 10A ... Valve body, 11 ... Main body, 12 ... Seat member mounting part, 13, 13A ... Guide part, 14 ... Valve chamber, 16 ... First conduit, 17 ... Second conduit, 20, 20A ... Seat member, 21 ... Seat body, 22 ... Flange, 23 ... Valve port, 24 ... Valve seat, 25 ... Bleed groove, 30, 30A ... Cap, 31 ... Cylindrical part, 31a ... Lower end , 32 ... Ceiling part, 33 ... Connecting part, 40, 40A ... Aspirator, 40a ... Lower end part, 50 ... Plunger, 51 ... Plunger spring, 60 ... Valve body, 61 ... Body part, 62 ... Valve body part, 70 ... Electromagnetic coil, 71 ... stopper, 80 ... brazing material, 90 ... adjustment jig, 91 ... tapered surface, 95 ... welding equipment

Claims (3)

A cylindrical valve body, a seat member fixed to one end of the valve body, a cap arranged on the other end side of the valve body, and a valve seat of the seat member can be moved forward and backward. It is a method of assembling an on-off valve having a valve body arranged in
The connecting portion is arranged so as to protrude from one end of the cap.
A guide portion is provided at the other end of the valve body to regulate the inclination of the cap with respect to the valve body by contacting the outer peripheral surface of the connecting portion.
After fixing the seat member to the valve body, an adjusting jig is inserted into the valve body from the guide portion to adjust the valve seat.
A method for assembling an on-off valve, characterized in that the connecting portion is inserted while sliding on the guide portion, and the valve main body and the cap or the connecting portion are fixed by welding. The guide portion is provided so as to position the adjusting jig with respect to the valve body and guide the insertion of the adjusting jig into the valve body.
After the seat member is fixed to the valve body, the adjusting jig is inserted into the guide portion to position the adjusting jig with respect to the valve body, and the adjusting jig is inserted by the guide portion. The method for assembling an on-off valve according to claim 1, wherein the valve seat is adjusted by guiding and pressing the adjusting jig. Claim 1 or claim that the seat member is brazed to the valve body, and at the same time, the first conduit is brazed to the valve body and the second conduit is brazed to the seat member. Item 2. The method for assembling the on-off valve according to Item 2.

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