JP2015135127A - Electrical drive valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical drive valve capable of using main components in common, and capable of selecting a required flow rate without increasing the number of components, man-hour and cost.SOLUTION: A flow rate of fluid in valve opening (full opening) is regulated by a diameter of an outflow port of a throttle plate. A plurality of throttle plates 30a-30d having different diameter D1 of outflow ports 35a-35d are molded in advance, and the throttle plate 30a, 30b, 30c or 30d in correspondence with the flow rate required by an electrical drive valve 1 is selected among them, and the selected one is interposed between a valve element 7 and a secondary side pipe 6. Accordingly, the electrical drive valve with the desired flow rate can be achieved in which the valve element 7 and the secondary side pipe 6 are made common.

Description

  The present invention relates to an electrically driven valve, and more particularly to an electrically driven valve capable of selectively setting a flow rate when the valve is opened (fully opened).

  Conventionally, for example, as an electrically driven valve used in a refrigeration cycle of a cooling device or the like, in Patent Document 1, a valve body including a main valve chamber having a main valve seat (valve port) is connected to the main valve chamber. A primary pipe on the inflow side, a secondary pipe on the output side connected to the lower side of the main valve seat, a main valve body that is slidably inserted into the valve body and is in contact with and separated from the main valve seat, and an electromagnetic type There is disclosed a pilot-type solenoid valve that includes an actuator, is configured to open and close a pilot valve body by an electromagnetic actuator, and to open and close a main valve body in response to the pilot valve body.

  Further, in Patent Document 2, a thin plate member with a hole configured separately is interposed between a vertical pipe connected to the lower side of the main valve seat and the main valve seat, and the shape of the hole formed in the thin plate member is There is known a motor-operated valve configured to reduce the refrigerant passing sound by appropriately adjusting the number and subdividing bubbles in the refrigerant passing through holes formed in the thin plate member.

JP 2007-92825 A JP 2007-107623 A

  In the pilot type electromagnetic valve as shown in Patent Document 1, the flow rate of the fluid flowing through the secondary side pipe when the main valve body is opened (fully opened) is set in advance according to the application or the like. That is, this type of pilot-type solenoid valve usually combines a valve opening of the main valve seat corresponding to a required flow rate when the valve is opened (fully opened) and a secondary side pipe having an opening diameter corresponding to the valve opening. The combination of these generally determines the flow rate of the solenoid valve. For this reason, it is necessary to prepare a plurality of secondary pipes having different diameters for each valve opening size of the main valve seat.

  Moreover, since the motor operated valve shown in Patent Document 2 has a structure in which a thin plate member with a hole formed separately is interposed between a vertical pipe (secondary pipe) and a main valve seat, a hole formed in the thin plate member. Although the final flow rate is defined by the diameter of the electric valve, the purpose of interposing the thin plate member with a hole in the motor operated valve shown in Patent Document 2 is to reduce the refrigerant passing sound when passing through the vertical pipe, and the thin plate The hole formed in the member is formed for the purpose of changing the opening ratio of the hole according to the operating conditions and the usage environment of the cooling equipment etc. in which the motorized valve is used, and the flow rate when the valve is opened (fully opened) It is not specified. For this reason, when setting the flow rate of the fluid flowing through the secondary side pipe when the valve is opened (fully open), the main valve seat and the vertical pipe (secondary side pipe) corresponding to the valve port of this main valve seat are combined. Is the same as Patent Document 1. Therefore, in the conventional electrically driven valves disclosed in Patent Document 1 and Patent Document 2, a plurality of secondary pipes having different diameters are manufactured for each diameter of the valve seat, and the main valve seat and its valve are manufactured. Designed to achieve the required flow rate by combining the secondary pipe corresponding to the mouth, the electrically driven valve with this configuration increases the number of manufactured parts, and inventory management of the parts It has a problem that it takes a lot of trouble.

  Therefore, the present invention has been made in view of the above-described conventional problems, and it is possible to reduce the cost of inventory management of parts by reducing the manufacturing cost by using assembling parts in common and reducing required manufacturing costs. An object of the present invention is to provide an electrically driven valve capable of selectively setting a flow rate at the time of valve (fully open).

  In order to achieve the above object, an electrically driven valve according to the present invention is connected to a valve body having a valve chamber, a primary pipe connected to the inflow side of the valve chamber, and an outflow side of the valve chamber. A secondary pipe, a valve seat formed on the valve body, a valve body slidably inserted into the valve body and contacting and separating from the valve seat, and a driving means for opening and closing the valve body. In the electrically driven valve, a thin plate-like flow rate adjusting means having a flow rate regulating diameter that regulates the flow rate of the fluid flowing through the secondary pipe when the valve body is opened is constituted separately, and the flow rate adjusting means Is interposed between the valve body and the secondary pipe.

  More specifically, the flow rate adjusting means is composed of a plurality of throttle plates having different outlet diameters in advance, and a desired one of the electrically driven valve is selected from the plurality of throttle plates having different diameters. A throttle plate having an outlet having a diameter corresponding to the flow rate is selected and interposed between the valve body and the secondary pipe.

  The electrically driven valve according to the present invention includes a pilot valve body at the tip of the drive means, and the pilot valve body is opened and closed by the drive means, and the valve body is responsive to the pilot valve body. Is configured to open and close.

  Furthermore, the electrically driven valve according to the present invention includes a flange portion on the throttle plate, and the flange portion is sandwiched between the valve main body and the secondary side pipe so that the valve main body, the throttle plate, and the secondary side are sandwiched. The pipe is fixed by brazing, and a concave portion for accommodating excess brazing is formed in the flange portion.

  According to the electrically driven valve of the present invention, the flow rate of the fluid when the valve is opened (fully opened) is defined by the diameter of the outlet formed in the restrictor plate, which is the flow rate adjusting means, and is electrically driven from the plurality of restrictor plates. By selecting a throttle plate with an outlet having a diameter corresponding to the flow rate required for the valve and assembling it between the secondary pipe and the valve body, the valve body and the secondary pipe can be shared. . Thereby, it is not necessary to increase the number of parts, man-hours, etc., and the cost can be kept low.

  In addition, when brazing and fixing the throttle plate and the secondary pipe to the valve body, the excess wax is accommodated in a recess formed in the throttle plate, and the wax overflows from the gap between the valve body, the throttle plate, and the secondary pipe. Since there is no worry, brazing is easy.

It is a whole sectional view showing the electric drive valve of the example of the present invention. (A) (B) (C) (D) is explanatory drawing which shows the some aperture plate which is the flow volume adjustment means of the electrically driven valve of the Example of this invention. It is an expanded sectional view which shows the state which brazed and fixed the valve main body, throttle plate, and secondary side pipe of the electrically driven valve of the Example of this invention.

  Hereinafter, an embodiment of the present invention will be described taking as an example a case where the present invention is applied to a pilot-type solenoid valve used in a refrigeration cycle such as an air conditioner as an electrically driven valve of the present invention.

  FIG. 1 shows an overall cross-sectional view of the present invention, and the configuration of the entire pilot type solenoid valve 1 will be described with reference to FIG. The pilot type electromagnetic valve 1 includes a valve body 4 provided with a valve chamber 3 having a valve seat 2, a primary pipe 5 connected to the inflow side of the valve chamber 3, and a downstream side of the valve seat 2 in the valve body 4. A secondary pipe 6 that is positioned and connected to the outflow side of the valve chamber 3, a valve body 7 that is slidably fitted into the valve body 4 and that contacts and separates from the valve seat 2, and electromagnetic that serves as a drive means Type actuator 10.

  The electromagnetic actuator 10 includes a coil 11 for energizing excitation, a housing 12 that covers the outer periphery of the coil 11, an attractor 14 that is fixed to the back side of the top plate portion of the housing 12 by a bolt 13, and an opposing face to the attractor 14. The plunger 15 is provided. A pilot valve body 16 made of a ball is fixed to the tip of the plunger 15 by caulking. A storage recess 18 into which a valve closing spring 19 made of a coil spring is inserted is formed on the plunger 15.

  The plunger 15 is slidably inserted into the guide pipe 20. The upper end of the guide pipe 20 is fixed to the outer peripheral step portion of the suction element 14 by welding or the like, and a flange portion 20a formed at the lower end of the guide pipe 20 is mounted on the step portion formed on the upper inner periphery of the valve body 4. Is placed. The flange portion 20 of the guide pipe 20 is fixed by a caulking portion 4a at the upper part of the valve body 4 with the ring-shaped member 17 interposed therebetween, and the caulking portion 4a, the ring-shaped member 17 and the guide pipe 20 are fixed by brazing. ing.

  The valve body 7 has a large-diameter portion 7a that is slidably fitted into the guide pipe 20 and a small-diameter portion 7b that opens and closes the valve port 2a of the valve seat 2 and has a reverse convex shape in cross section. A pilot passage 8 that is opened and closed by the pilot valve body 16 is formed so as to penetrate the central portion thereof. Further, a pressure equalizing passage 26 communicating between the back pressure chamber 25 and the valve chamber 3 formed between the valve body 7 and the plunger 15 is formed in the large diameter portion 7a, and the valve body 7 is closed. At this time, the fluid introduced from the primary side pipe 5 into the valve chamber 3 is introduced into the back pressure chamber 25 through the pressure equalizing passage 26, and the outer peripheral surface of the plunger 15 and the inner periphery of the guide pipe 20 from the back pressure chamber 25. It is also guided to the gap space S formed between the lower end surface of the suction element 14 and the plunger 15 through the space (between the sliding surfaces).

  A thin plate-like throttle plate is interposed between the valve body 7 and the secondary pipe 6 as a flow rate adjusting means for regulating the flow rate of the fluid when the pilot type solenoid valve 1 is opened (fully opened). The throttle plate forms an outlet at the center, and the flow rate of the fluid, that is, the flow rate of the pilot type electromagnetic valve 1 is determined according to the diameter of the outlet port. In this throttle plate, a plurality of throttle plates having different outlet diameters are formed in advance, and a throttle plate having an outlet corresponding to a required flow rate is interposed between the valve body 7 and the secondary pipe 6. I am letting. This diaphragm plate is common so that the outer diameter D is the same as the outer diameter of the secondary pipe 6 except that the outlet diameter D1 is different, and the number of diaphragm plates to be molded in advance is not particularly limited. Although it is possible to mold n diaphragm plates, as a specific example, four diaphragm plates 30a to 30d having different diameters D1 of the outlets 35a to 35d are molded as shown in FIG. The example which assembled | attached the aperture plate 30b which has the outflow port 35b among the aperture plates 30a-30d of a sheet | seat is shown.

  As shown in FIG. 2, each of the diaphragm plates 30 a to 30 d is inclined toward the respective outlets 35 a to 35 d from the flange portion 31 interposed between the valve body 7 and the secondary pipe 6. And a cylindrical portion 33 extending downward from the lower end of the tapered portion 32. The cylindrical portion 33 is opened to form the outlets 35a to 35d. As shown in FIG. 3, a mounting hole 28 is formed on the lower surface of the valve body 7 so as to communicate with the valve port 2 a of the valve seat 2 and insert and fit the throttle plates 30 a to 30 d and the secondary pipe 6. Any one of the diaphragm plates 30a to 30d is inserted into the mounting hole 28 so that the flange portion 31 of the diaphragm plate 30b abuts on the stepped portion 29 formed on the inner end side of the mounting hole 28. The secondary pipe 6 is inserted, and the throttle plate 30 b and the secondary pipe 6 are brazed and fixed to the valve body 7. Further, a concave portion 34 is formed on the surface of the flange portion 31 in order to accommodate surplus wax during brazing. The recess 34 may be annular or a plurality of recesses 34 may be formed intermittently in the radial direction, and it is only necessary to secure a volume capable of accommodating surplus wax.

  In the pilot type solenoid valve 1 configured as described above, when the coil 11 is energized, the plunger 15 is attracted and attracted to the attractor 14, and accordingly, the pilot valve body 16 is opened (upward). ) Is moved (lifted). As a result, the pilot passage 8 is opened, and the fluid in the back pressure chamber 25 is discharged to the secondary side pipe 6 through the pilot passage 8 all at once. For this reason, the back pressure chamber 25 is decompressed and opened. Here, the flow rate of the fluid when the valve is opened (fully opened) is defined by the diameter D1 of the outlet 35b of the throttle plate 30b, and if the throttle plate 30a having the outlet 35a having a smaller diameter D1 is used, the valve is opened (fully opened). When the throttle plate 30c or 30d having the outlet 35c or 35d having a large diameter D1 is used, the fluid flow rate when the valve is opened (fully opened) is increased. Conventionally, the secondary pipe 6 having a diameter corresponding to the valve opening of the valve seat according to the flow rate that differs for each pilot type solenoid valve 1 is assembled to the valve body 7, but in this embodiment, the pilot type Depending on the flow rate required for the solenoid valve 1, it is only necessary to select and use the diaphragm plates 30a to 30d suitable for it, so that the valve body 7 and the secondary pipe 6 can be shared.

  When energization of the coil 11 is stopped, the plunger 15 moves in a direction away from the attractor 14, and accordingly, the pilot valve body 16 moves in the valve closing direction (downward), and the pilot passage 8 is closed. When the plunger 15 moves away from the suction element 14, the valve body 7 comes into contact with the valve seat 2 formed in the valve body 4 to close the valve. In this case, a bleat groove or the like may be provided in the valve seat 2 so that some liquid flows when the valve is closed.

  In addition, the diaphragm plates 30a to 30d having different outlets 35c to 35d can be easily manufactured by press working or cutting, are easy to form, and according to the required flow rate required for the pilot solenoid valve 1, There is no need to mold the valve body 7 and the secondary side pipe 6 corresponding to the valve port 2a, and the valve body 7 and the secondary side pipe 6 can be shared, so that the number of parts, man-hours, etc. are not increased. The cost can be kept low. Further, by forming the flange portion 31 as the throttle plates 30a to 30d and the tapered portion 32 inclined from the flange portion 31 toward the outlets 35a to 35d, the diaphragm plate is simply a flat plate having an outlet port. The diaphragm plates 30a to 30d are not deformed by the pressure of the fluid.

  Further, when the concave portion 34 is formed in the flange portion 31 of the throttle plates 30a to 30d and the throttle plate 30b and the secondary side pipe 6 are brazed and fixed to the valve body 7, excess wax is accommodated in the concave portion 34. Since there is no fear of overflowing from the gaps between the valve body 7, the throttle plate 30b, and the secondary pipe 6, brazing is easy, and the recess 34 is formed by pressing or cutting the throttle plates 30a to 30d. At this time, it is easy to form, and the forming process is easy.

  As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to each said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the above-described embodiment, an example is shown in which the pilot-type electromagnetic valve 1 is applied as an electrically driven valve used in a refrigeration cycle. However, the present invention is not limited thereto, and a direct-acting type electromagnetic that directly drives a valve body. The present invention can be applied to various valve mechanisms such as a motor-operated valve that opens and closes a valve body by converting the rotational force of a valve and a motor into a vertical motion, and the basic configuration of an electrically driven valve may be appropriately selected.

DESCRIPTION OF SYMBOLS 1 Electrically driven valve 2 Valve seat 3 Valve chamber 4 Valve body 5 Primary side pipe 6 Secondary side pipe 7 Valve body 10 Electromagnetic actuator (drive means)
16 Pilot valve body 30a-30d Throttle plate (flow rate adjusting means)
31 Flange part 34 Concave part 35a-35d Outlet D1 Flow regulation aperture

Claims (4)

A valve body including a valve chamber, a primary pipe connected to the inflow side of the valve chamber, a secondary pipe connected to the outflow side of the valve chamber, a valve seat formed in the valve body, In an electrically driven valve comprising a valve body slidably inserted in the valve body and contacting and separating from the valve seat, and a drive means for opening and closing the valve body,
A thin plate-like flow rate adjusting means having a flow rate regulating diameter that regulates the flow rate of the fluid flowing through the secondary pipe when the valve body is opened is configured separately, and this flow rate adjusting means is configured as the valve body and the second body. An electrically driven valve characterized by being interposed between a secondary pipe.   The flow rate adjusting means is composed of a plurality of throttle plates having different outlet diameters in advance, and a diameter corresponding to a desired flow rate of the electrically driven valve is selected from the plurality of throttle plates having different diameters. 2. The electrically driven valve according to claim 1, wherein a throttle plate having an outlet is selected and interposed between the valve body and the secondary pipe.   A pilot valve body is provided at the tip of the driving means, and the pilot valve body is driven to open and close by the driving means, and the valve body is opened and closed in response to the pilot valve body. The electrically driven valve according to claim 1 or 2.   The throttle plate is provided with a flange portion, and the flange portion is sandwiched between the valve body and the secondary side pipe, and the valve body, the throttle plate, and the secondary side pipe are brazed and fixed. The electrically driven valve according to claim 2, wherein a recess for accommodating surplus wax is formed.

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