JPH0960752A - Shutoff valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small drive section by forming a shutoff valve with a main passage feeding a gas fluid, a main passage opening/closing means opening or closing the main passage, the rotor of a motor connected to the main passage opening/closing means provided in the main passage, and the stator of the motor provided outside the main passage. SOLUTION: A main passage opening/closing means 12 is constituted of a converting means 15 converting the rotary motion of the rotor 14 of a motor 13 serving as a drive section into the vertical motion and a main passage opening/closing valve 16 connected to the converting means 15 and moved vertically. If a closing signal is outputted when the main passage opening/closing valve 16 is opened, a gas fluid flows, and the motor 13 is stopped, the rotor 14 is rotated, and the main passage opening/closing valve 16 is moved downward via the converting means 15 by this rotation. The moved main passage opening/ closing valve 16 is brought into contact with a valve seat 11 to close a main passage 10, and the operation of the motor 13 is stopped. The rotor 14 receives no effect of the gas fluid flowing in the main passage 10 due to a support plate 19, and the stable characteristic of the motor 13 can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrically driven valve for controlling the opening and closing of the flow of gas fluid flowing in a flow path.

[0002]

2. Description of the Related Art A conventional shut-off valve of this type is disclosed in Japanese Unexamined Patent Publication No. 1-17.
What was shown in the 6876 gazette was general. The configuration will be described below with reference to FIGS. 8, 9, and 10. As shown in FIGS. 8, 9, and 10, a main valve 4 biased by a spring 3 against a main valve seat 2 is provided in the passage 1. A pilot valve 5 is provided at the center of the main valve 4. An inner plunger 7 operated by an electromagnetic force generated by a coil 6 is in contact with the pilot valve 5. Also the outer plunger 8
Is connected to the main valve 4. To open the main valve 4 in the closed state as shown in FIG. 8, the coil 6 is energized to pull up the inner plunger 7 from the pilot valve 5 as shown in FIG. At this time, the differential pressure between the upstream side and the downstream side of the main valve 4 becomes small. In this state, the outer plunger 8 is pulled up, and FIG.
The main valve 4 opens like 0.

[0003]

However, in the conventional shutoff valve, the plunger is moved in the same direction as the main valve by the electromagnetic force to open and close the main valve, so that the electromagnetic force is effectively applied. The plunger part and the coil part were largely protruded from the valve body, resulting in an increase in size.

Further, in order to control the opening and closing of a gas fluid having a large flow rate, it is necessary to enlarge the main valve seat and the main valve, and also the stroke of the plunger must be enlarged, so that the coil becomes large and the shutoff valve as a whole becomes large. Become. Further, in order to control the opening and closing of a gas fluid having a large flow rate, it is necessary to manufacture a plurality of types of valves adapted to various flow rate ranges.

The present invention solves the conventional problems as described above, and a first object of the present invention is to realize a small drive unit.

A second object of the present invention is to provide a flow path opening / closing means which is small in size and has a large stroke.

A third object is to realize a shutoff valve which can reduce the output of the drive unit.

A fourth object is to speed up the operation when the valve is closed. Further, a fifth object is to provide a shutoff valve that can handle various flow rate ranges with one type.

A sixth object is to provide a small valve structure that can handle various flow rates.

[0010]

In order to achieve the first object of the present invention, a main flow passage for flowing a gas fluid, a main flow passage opening / closing means for opening / closing the main flow passage, and a main flow passage provided in the main flow passage are provided. The rotor of the electric motor is connected to the opening / closing means, and the stator of the electric motor is provided outside the main flow path.

In order to achieve the second object of the present invention, the main flow path opening / closing means is a conversion means for converting the rotational motion of the rotor into vertical movement, and a main flow path opening / closing connected to the conversion means and moving vertically. It is composed of a valve.

Further, in order to achieve the third object of the present invention, the main passage opening / closing valve is provided with an urging means for operating in a closing direction with respect to a valve seat provided in the main passage and the urging means. It is composed of a biased main valve portion, a sub-flow passage provided in the main valve portion, a sub-valve seat provided in the sub-flow passage, and a sub-valve portion that biases the sub-valve seat in the closing direction. It is a thing.

Further, in order to achieve the fourth object of the present invention, the conversion means performs the closing operation of the main valve portion by the urging means of the main valve portion, and the rotation movement of the rotor causes the main valve portion to move. It is composed of a rotation / linear movement converting means for performing opening movement.

Further, in order to achieve the fifth object of the present invention, a main flow path for flowing a gas fluid, a flow path opening / closing means for opening / closing the main flow path, a driving means for driving the flow path opening / closing means, and a main flow path. The opening degree of the opening / closing means includes a plurality of valve opening degree setting means capable of setting a plurality of opening degrees according to the type of fluid.

In order to achieve the sixth object of the present invention, the main passage opening / closing means is composed of a valve that moves in a direction perpendicular to a valve seat provided in the passage.

[0016]

According to the present invention, by providing the rotor of the electric motor in the flow path according to the above-described structure, only the stator projects outside the flow path, which enables a small drive unit.

Further, according to the present invention, by converting the rotational movement of the rotor that moves in the same plane into the vertical movement, the movement surface on the drive unit side is a flat surface, so that it is small and has a large stroke.

Further, according to the present invention, since the main valve portion is opened after the sub valve is opened when the valve is opened, the differential pressure before and after the main valve portion is reduced when the sub valve is opened, and the closed valve acting on the main valve is closed. It is possible to open the main valve with a small driving force and a small driving force.

Further, according to the present invention, the closing speed of the main valve can be increased by performing the closing operation of the main valve by the biasing means of the main valve.

Further, according to the present invention, by setting a plurality of maximum opening amounts of the flow path opening / closing means, it is possible to change the maximum flow rate with one type of valve, and to change various fluid types or various flow rate ranges. To realize a shutoff valve that can set the valve opening accordingly.

Further, according to the present invention, by adopting the valve structure which moves in the direction perpendicular to the valve seat, the maximum flow rate can be made to flow with a short stroke, and a small-sized valve capable of giving a large flow rate can be realized.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment corresponding to the first invention and the second invention will be described below with reference to FIGS.
FIG. 1 is a sectional view of an embodiment of the first invention and the second invention when a valve is opened. FIG. 2 is a sectional view when the valve is closed.

In FIGS. 1 and 2, reference numeral 9 is a valve frame body, and a main flow path 10 through which a gas fluid flows in the valve frame body 9.
Is formed, and a valve seat 11 is provided in a part thereof. Reference numeral 12 is a main flow path opening / closing means, which is composed of a conversion means 15 for converting the rotational motion of a rotor 14 of a motor 13 as a drive unit into vertical movement, and a main flow path opening / closing valve 16 connected to the conversion means 15 and moving vertically. Has been done. This conversion means 1
Reference numeral 5 converts the rotational movement of the rotor 14 into vertical movement of the main flow path opening / closing valve 16 via a screw mechanism (not shown). 17
Is a magnet fixed to the rotor 14. 18 is the rotor 1
4 is a bearing that supports 4 at a fixed position. This bearing 18
Is fixed to a support plate 19 provided in the main channel 10. The rotor 14 provided in the main flow path 10 has a cover 20.
The gas flow in the main flow path 10 is covered with the structure so as not to leak. Reference numeral 21 denotes a stator which constitutes the motor 13 and is constituted by a coil.

The operation of the above structure will be described with reference to FIG.
Is the state when the gas fluid is flowing. At this time, the main flow path opening / closing valve 16 is in the open state and the gas fluid is flowing. At this time, the motor 13 is in a stopped state. When a closing signal is output from a controller (not shown) in this state, the rotor 14 rotates, and this rotation moves the main flow path opening / closing valve 16 downward via the converting means 15. When the moved main passage opening / closing valve 16 comes into contact with the valve seat 11 to close the main passage 10 as shown in FIG. 2, the operation of the motor 13 is stopped. The operation / stop control of the motor 13 is controlled by an input signal from a controller (not shown). 1 and 2 in the first aspect of the invention, the rotor 14 is configured so as not to be affected by the gas fluid flowing through the main passage 10 by the support plate 19, and stable characteristics of the motor 13 can be obtained. Is something that can be done.

Next, an embodiment corresponding to the third invention and the fourth invention will be described with reference to FIGS. 3, 4 and 5. FIG. 3 is a sectional view of the third and fourth embodiments of the invention when the valve is closed, and FIG. 4 is a sectional view when the valve is open. 5A and 5B are a perspective view and an internal development view showing the configuration of the converting means.

In FIGS. 3 and 4, reference numeral 22 is a valve frame body, and a main flow path 23 through which a gas fluid flows is formed in the valve frame body 22, and a valve seat 24 is provided in a part thereof. Has been. Reference numeral 25 is a main flow path opening / closing means, which is a rotation / straightening conversion means 28 for converting the rotational movement of a rotor 27 of a motor 26, which is a drive part, into vertical movement, and this rotation / straightening conversion means 28
It is composed of a main flow path opening / closing valve 29 which is connected to and moves up and down. The main flow path opening / closing valve 29 is a valve seat 2 provided in the main flow path 23.
4, a main valve portion 31 biased by a spring 30 so as to operate in a closing direction, and a sub-flow passage 32 provided in the main valve portion 31.
And a valve shaft 34 having a sub valve portion 33 that opens and closes the sub flow passage 32. Reference numeral 35 designates the sub-valve section 33 and the sub-flow channel 32.
It is a spring that urges to. Reference numeral 36 is a metal fitting provided on the valve shaft 34. 37 is a magnet fixed to the rotor 27, and 38 is a bearing that supports the rotor 27 at a fixed position. The bearing 38 is fixed to a support plate 39 provided in the main flow path 23. The rotor 27 provided in the main flow path 23 is covered with a cover 40 so that the gas fluid in the main flow path 23 does not leak outside. Reference numeral 41 denotes a stator that constitutes the motor 26 and is constituted by a coil. 5 (a) and 5 (b) are a perspective view and an internal development view showing the structure of the conversion means 28, the groove 42 provided inside the rotation / straightening conversion means 28 gradually rises from the start position 43 to rotate. The straight conversion means 28 has a flat portion 44 before one rotation, and when it is rotated after that, the groove 42 moves in the groove 42 configured downward, and the original start position 43 is obtained.
It is configured to return to. Reference numeral 45 is a protrusion provided on the valve shaft 34.

The operation of the above configuration will be described. First, the opening operation of the valve will be described with reference to FIGS. 3, 4 and 5A and 5B. Controller (not shown) when valve is closed
When the opening signal is output from the motor 26 to the rotor 27,
Is rotated and the conversion means 28 is rotated, and the protrusion 45 provided on the valve shaft 34 moves up the groove 42 from the start position 43. At this time, first, the valve shaft 34 overcomes the spring 35 and is lifted, the sub valve portion 33 separates from the main flow passage opening / closing valve 29, and the sub flow passage 32 is formed (state of FIG. 3). Sub flow path 3
When 2 is configured, the pressure difference between the upstream side and the downstream side of the main valve portion 31 becomes small, and the force for urging the main valve portion 31 toward the valve seat 24 becomes almost the urging force of the spring 30 only. When the rotor 27 further rotates from this state, the valve shaft 34 moves upward in FIG. 3, the metal fitting 36 abuts on the lower side of the main valve portion 31 and lifts the main passage opening / closing valve 29 to open the valve as shown in FIG. State.

Next, the state in which the gas fluid is flowing will be described with reference to FIGS. 4 and 5, at which time the main flow passage opening / closing valve 29 is in the open state. At this time, the protrusion 45 of the valve shaft 34
Is stopped at the flat portion 44 of the groove 42 provided in the rotation / straightening conversion means 28. At this time, the main valve portion 31 is connected to the valve shaft 34.
It is in a state of being pulled up in the opening direction from the valve seat 24 by the metal fitting 36 provided on the.

Next, the closing operation of the main flow path opening / closing valve 29 will be described with reference to FIG.
Explaining with reference to FIGS. 4 and 5A and 5B, when a closing signal is output from the controller (not shown) to the motor 26 in the open state of FIG. 4, the rotor 27 rotates and the converting means. 28 rotates, the projection 45 provided on the valve shaft 34 is disengaged from the flat portion 44 of the rotation / straightening conversion means 28, and returns to the start position 43 through the groove 42 formed downward. As a result, the main flow path opening / closing valve 29 is closed. During the closing operation, the main passage opening / closing valve 29 performs the closing operation at a high speed by the biasing force of the spring 25.

Next, embodiments corresponding to the fifth and sixth inventions will be described with reference to FIGS. 6 and 7. 6 and 7 are cross-sectional views showing a state in which the opening amounts of the respective valves are different in the embodiments of the fifth invention and the sixth invention.

6 and 7, reference numeral 46 is a controller. Others are the same as in FIG. 3, and the description of the configuration is omitted.

The operation of the above configuration will be described with reference to FIG.
In accordance with the signal from the controller 46, the fully open position of the main flow path opening / closing valve 29 is in the state shown in FIG. In this state, the valve opening amount of the main valve portion 31 is set for the purpose of flowing a certain fixed amount of flow. 7 is the same valve as FIG. 6, but the fully open position of the main flow passage opening / closing valve 29 is higher than that in FIG. 6, that is, the opening amount of the main flow passage opening / closing valve 29 is set larger by the signal of the controller 46. Therefore, it is possible to flow a large amount of flow as compared with the valve of FIG. The main flow path opening / closing valve 29 is configured to move in the vertical direction with respect to the valve seat 24.

[0033]

As is apparent from the above description, the shut-off valve of the present invention has the following effects.

According to the invention described in claim 1, since the rotor of the electric motor is provided inside the main flow path,
The drive unit becomes extremely small. Therefore, it is effective as a shut-off valve for incorporating equipment.

According to the second aspect of the invention, the movement on the drive unit side is a rotational movement on the same plane, and the size of the conversion unit on the drive unit side can be reduced, so that a small flow path opening / closing means is realized. You can

According to the third aspect of the invention, the main valve portion is opened after the pressure difference between the upstream side and the downstream side of the main valve portion is reduced by the opening operation of the auxiliary valve during the valve opening operation. Since the biasing force acting on the valve portion is small, the output of the drive portion may be small.

According to the fourth aspect of the present invention, the closing speed can be increased by performing the closing operation by the biasing means of the main valve portion. Also, it can be closed by energizing for a short time, and power consumption can be reduced.

According to the fifth aspect of the present invention, a single type of shutoff valve can be used to set a plurality of openings of the main flow path opening / closing means, so that the shutoff valve can be used in common and has a practical effect.

According to the sixth aspect of the present invention, the main valve portion is moved in the direction perpendicular to the valve seat, the maximum flow rate can be obtained with the shortest stroke, and a small valve structure can be realized. Can be done.

[Brief description of drawings]

FIG. 1 is a structural cross-sectional view of a shutoff valve according to a first embodiment of the present invention when the valve is open.

FIG. 2 is a sectional view of the configuration of the shutoff valve when the valve is closed.

FIG. 3 is a sectional view showing the configuration of a shutoff valve according to a second embodiment of the present invention when the valve is closed.

FIG. 4 is a sectional view of the configuration of the shutoff valve when the valve is open.

FIG. 5 (a) is a perspective view showing the structure of the conversion means of the shutoff valve. FIG. 5 (b) is an internal development view showing the structure of the conversion means.

FIG. 6 is a sectional view showing the configuration of a shutoff valve according to a third embodiment of the present invention when it is opened.

FIG. 7 is a sectional view of the configuration of the shutoff valve when it is opened.

FIG. 8 is a sectional view of the configuration of a conventional shutoff valve when the valve is closed.

FIG. 9 is a sectional view of the configuration of the shutoff valve when the valve is opened.

FIG. 10 is a sectional view of the configuration of the shutoff valve when the valve is open.

[Explanation of symbols]

 10 main flow path 12 main flow path opening / closing means 13 electric motor 14 rotor 21 stator

Claims (6)

[Claims] 1. A main flow passage for flowing a gas fluid, a main flow passage opening / closing means for opening / closing the main flow passage, a rotor of an electric motor provided in the main flow passage and connected to the main flow passage opening / closing means, and the flow passage. A shutoff valve comprising a stator of the electric motor provided outside the electric motor. 2. The shutoff according to claim 1, wherein the main flow path opening / closing means is composed of a conversion means for converting the rotational movement of the rotor into a vertical movement, and a main flow path opening / closing valve connected to the conversion means and moving vertically. valve. 3. A main flow path opening / closing valve is provided in the main valve section, a biasing means that operates in a closing direction with respect to a valve seat provided in the main flow path, a main valve section biased by the biasing means. 3. The shutoff valve according to claim 2, comprising a sub-flow passage, a sub-valve seat provided in the sub-flow passage, and a sub-valve portion biasing the sub-valve seat in a closing direction. 4. The conversion means is constituted by a rotation / straight conversion means for performing the closing operation of the main valve portion by the urging means of the main valve portion and the opening movement of the main valve portion due to the rotational movement of the rotor. The shutoff valve according to claim 2 or 3. 5. A main flow path for flowing a gas fluid, a main flow path opening / closing means for opening / closing the main flow path, a driving means for driving the main flow path opening / closing means, and an opening degree of the main flow path opening / closing means depending on the type of fluid. A shutoff valve comprising a plurality of valve opening setting means that can be set correspondingly. 6. The shutoff valve according to claim 5, wherein the main flow path opening / closing means is a valve that moves in a direction perpendicular to a valve seat provided in the flow path.