JP5220364B2 - Compound valve - Google Patents

Description

  The present invention relates to a composite valve, and more particularly to a composite valve that can perform maintenance such as maintenance, inspection, and replacement of one valve body without obstructing the flow of fluid inside a pipe.

  Conventionally, a main valve body for performing a fluid opening / closing operation is provided inside the valve body, and a sub-valve body is provided inside the main valve body. A composite valve has been developed that controls the flow rate of fluid by opening and closing (see, for example, Patent Document 1).

  In such a composite valve described in Patent Document 1, it is provided with an opening for maintenance and inspection provided in a direction orthogonal to the direction in which the fluid flows, and with the main valve body closed, The auxiliary valve body can be maintained and inspected from the maintenance inspection opening.

  Further, a valve device that is not a composite valve but has been provided with a strainer inside the valve body so that the strainer can be exchanged from the opening in a state where the valve body is closed has been disclosed. (For example, refer to Patent Document 2).

JP 2002-349726 A JP 2000-046211 A

  However, in the compound valve described in Patent Document 1, when the maintenance and inspection of the sub-valve is performed, the flow path of the fluid is closed by the main valve body. When it is applied to a piping system that needs to be kept, it is necessary to provide a bypass pipe that bypasses the composite valve in order to secure a fluid flow path, and a separate on-off valve is provided to open and close the bypass pipe. Therefore, there is a problem that the number of parts is increased and the installation cost of the flow path piping is increased. In addition, when laying piping in a narrow space such as the back of a ceiling or a machine room, there is also a problem that it is often impossible to install bypass piping. I had to be patient.

  Similarly, the one described in Patent Document 2 also closes the fluid flow path when the strainer is replaced, so that it is necessary to provide a bypass pipe, which increases the installation cost of the flow path pipe. Have a problem.

  The present invention has been made in view of the above points, and can perform maintenance / inspection of the valve body without obstructing the flow of fluid, eliminate the need for bypass piping, and reduce the installation cost of the flow path. It aims at providing the composite valve which can be used.

In order to achieve the above object, an invention according to claim 1 is directed to a valve body having a fluid inlet and outlet, and the fluid that is installed inside the valve body and connects the inlet and outlet of the valve body. A first valve body that opens and closes the flow path, a through-flow path that is formed in the first valve body and forms the fluid flow path, and a fluid flow path that is installed inside the through-flow path. A second valve body that opens and closes, a bypass flow path that is formed in the first valve body and forms the fluid flow path when the first valve body is in a closed state, and the first valve body but and a hole for checking for servicing the communication with the first valve element to the through channel when in the closed state,
Each of the first valve body and the second valve body is a rotary valve,
Said bypass passage, said first valve body is communicated with the flow path between the inlet and outlet of the valve body when in the closed state, in which fluid flows during inspection of the second valve body It is characterized by that.

According to a second aspect of the present invention, in the first aspect of the present invention, an enlarged diameter portion formed by forming an inner diameter larger than the inflow port and the outflow port is formed in an inner portion of the valve body from the inflow port and the outflow port. It is characterized by being.

According to a third aspect of the present invention, in the first or second aspect, the rotation axes of the first valve body and the second valve body are arranged coaxially.

According to a fourth aspect of the present invention, in any one of the first to third aspects, an inspection plug is detachably attached to the inspection hole.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the bypass flow path plug is detachably attached to the bypass flow path.

The invention according to claim 6 is characterized in that, in claim 5 , the valve body is formed with a plug hole for attaching and detaching the bypass flow passage closing plug.

According to the invention according to claim 1, in a state where the first valve body is a rotating valve is opened, by opening and closing the second valve body is a rotary valve, can control the flow rate of the fluid In addition, the second valve element can be maintained and inspected from the inspection hole with the first valve element closed. In addition, when performing maintenance and inspection of the second valve body with the first valve body closed, the flow of fluid can be secured by the bypass flow path formed in the first valve body, As in the prior art, bypass piping is not required, and it can be easily installed at an arbitrary location, and the flow path installation cost can be reduced. In addition, since the bypass flow path communicates with the flow path connecting the inlet and the outlet of the valve body when the first valve body is closed, the flow path by the through flow path of the first valve body And the flow path by the bypass flow path can be a common flow path.

According to the second aspect of the present invention, the enlarged portion formed by forming the inner diameter larger than the inlet and the outlet is formed inside the inlet and the outlet of the valve body. Even when the through flow passage and the bypass flow passage are arranged at positions shifted from the inlet and the outlet by the diameter portion, the fluid passage can be secured, and the shape of the valve main body or the first valve body is increased. Without doing so, it is possible to secure a flow path from the inlet to the through flow path, the bypass flow path, or the outlet.

According to the invention of claim 3 , since the rotation shafts of the first valve body and the second valve body are arranged coaxially, bearings are provided in each of the first valve body and the second valve body. There is no need to provide a structure, and space can be saved.

According to the invention of claim 4 , since the inspection plug is detachably attached to the inspection hole, the inspection hole is closed by closing the inspection hole except during maintenance / inspection. This prevents fluid from leaking outside the valve body.

According to the fifth aspect of the present invention, since the bypass flow passage closing plug is detachably attached to the bypass flow passage, the bypass flow passage closing plug is attached to the bypass flow passage to close the bypass flow passage. Therefore, for example, when it becomes necessary to perform maintenance on a member other than the composite valve located downstream of the composite valve, such as an air conditioner coil in an air conditioning system, the first valve body is simply closed. , Complete sealing of the fluid is possible.

According to the sixth aspect of the present invention, since the plug body hole for attaching and detaching the bypass passage blocking plug is formed in the valve body, for example, when the first valve body is in the open state, the plug hole Therefore, it is possible to attach and detach the bypass flow path plug.

  Hereinafter, embodiments of a composite valve according to the present invention will be described with reference to the drawings.

1 to 4 show a composite valve according to a first embodiment of the present invention.
The composite valve according to the present invention includes a valve body 3 having a fluid inlet 1 and a fluid outlet 2, and the valve body 3 has a first valve body that opens and closes a fluid flow path. The ball valve body 4 is accommodated. The ball valve body 4 is formed with a through flow passage 5 penetrating so as to communicate with the fluid inlet 1 and the outlet 2.

  A partition wall 6 that divides the inlet 1 side and the outlet 2 side up and down is formed in the through channel 5, and an opening 7 is formed in the middle of the partition wall 6. . The fluid is guided to the upper surface of the opening 7 and flows out to the lower surface of the opening. In the opening 7 portion of the partition wall 6, a globe valve valve body 8 as a second valve body that opens and closes the opening 7 by an elevating operation is disposed. The flow area of the opening 7 is changed by movement to control the flow rate of the fluid.

  Further, a bypass passage 9 is formed at a predetermined angle with respect to the direction in which the through passage 5 is formed so that the inflow port 1 and the outflow port 2 communicate with each other when the ball valve body 4 is closed. In other words, in the present embodiment, the axis of the bypass channel 9 is disposed at an angle of about 60 ° with respect to the axis of the through channel 5. The bypass channel 9 is formed at any angle with respect to the through channel 5 as long as the inlet 1 and the outlet 2 can be communicated with each other when the ball valve body 4 is in the closed state. You may do it.

  In addition, an inspection hole 10 that communicates with the through passage 5 when the ball valve body 4 is in a closed state is formed in the upper portion of the valve body 3. In the present embodiment, the inspection hole 10 is also used as an attachment hole for attaching the valve body 8 for the globe valve. When this inspection hole 10 is used as a composite valve, It is blocked.

Next, the operation of this embodiment will be described.
According to the composite valve in the present embodiment, as shown in FIG. 1 and FIG. 2, the ball valve body 4 is in an open state, and the through passage 5 is communicated with the inlet 1 and the outlet 2. By opening and closing the globe valve valve body 8, the flow rate of the fluid flowing through the through flow path 5 is controlled.

  Then, when performing maintenance such as maintenance, inspection, and replacement of the globe valve valve body 8, as shown in FIGS. 3 and 4, the ball valve body 4 is rotated counterclockwise by about 60 ° and is closed. Hold on. In this state, the bypass flow path 9 communicates with the inflow port 1 and the outflow port 2, so that the fluid flow is not hindered. And the maintenance of the valve body 8 for globe valves is performed from the inspection hole 10 provided in the valve body 3.

  Further, in the present embodiment, the ball valve body 4 is further rotated by about 60 ° counterclockwise from the state shown in FIGS. 9 can be held in a closed state, and a complete closed state can be secured.

  Therefore, in the present embodiment, the bypass flow path 9 for bypassing the inflow port 1 and the outflow port 2 is formed. Therefore, by closing the ball valve body 4, the fluid flow is not hindered. The maintenance of the valve body 8 for the globe valve can be easily performed. In addition, a bypass passage 9 for bypassing the inlet 1 and the outlet 2 is formed integrally with the ball valve body 4 provided with a flow passage 5 for adjusting the flow rate. Since there is no need to provide the passage 9, the composite valve having the bypass passage 9 can be obtained with a compact structure. As a result, when the ball valve body 4 is closed and maintenance of the globe valve valve body 8 is performed, the flow of fluid is not obstructed by the bypass flow path 9, so that bypass piping is not required as in the prior art. It can be easily installed at an arbitrary place, and the flow path installation cost can be reduced.

Next, a second embodiment of the composite valve according to the present invention will be described with reference to FIGS.
As shown in FIGS. 5 and 6, the composite valve includes a valve body 11 having a hollow inside, and a lid 12 is screwed to one side of the valve body 11. Yes. The valve body 11 is configured by screwing of the lid body 12.

  The lid 12 is provided with a fluid inlet 13, and a fluid outlet 14 is provided on the other side of the valve body 11. An upper stem hole 15 extending upward is provided on the upper surface of the valve body 11, and actuator flanges 16, 16 are formed at the upper end edge of the upper stem hole 15 of the valve body 11. It protrudes in the diameter direction. A lower stem hole 17 extending downward is provided on the lower surface of the valve body 11.

  Further, an inspection hole 18 extending in a direction orthogonal to the direction connecting the inlet 13 and the outlet 14 is formed on one side surface of the valve body 11 so as to bulge from the valve body 11. The inspection hole 18 is closed by an inspection plug 19 screwed into the inspection hole 18.

  A substantially spherical ball valve body 20 as a first valve body is accommodated in the valve body 11. Ball seats 21 and 21 are disposed between the ball valve body 20 and the valve body 11 and the lid body 12, respectively, and are configured to hold the ball valve body 20 at an appropriate position inside the valve body 11. Has been.

  In the present embodiment, a through-flow passage 22 that penetrates in the diametrical direction is formed above the ball valve body 20 so that the axis connecting the inlet 13 and the outlet 14 and the axis are parallel to each other. A bypass flow path 23 that penetrates in a direction orthogonal to the through flow path 22 and has a smaller diameter than the through flow path 22 is formed below the through flow path 22 of the ball valve body 20. That is, the axis of the bypass channel 23 is arranged so as to have an angle of about 90 ° with respect to the axis of the through channel 22.

  Further, in the present embodiment, an enlarged diameter portion 50 having an inner diameter larger than that of the inlet 13 and the outlet 14 is formed inside the inlet 13 and the outlet 14 of the valve body 11. Further, the side end surfaces of the ball valve body 20 facing the inlet 13 and the outlet 14 are formed in a shape cut in a direction perpendicular to the axis connecting the inlet 13 and the outlet 14. Therefore, even when the through flow path 22 and the bypass flow path 23 are arranged at positions shifted from the inlet 13 and the outlet 14 due to the shape of the side end face of the ball valve body 20 and the enlarged diameter portion 50, the flow path of the fluid Without increasing the shape of the valve body 11 or the ball valve body 20, the flow path to the inlet, the through flow path or the bypass flow path, and the outlet can be ensured.

  Further, a stem hole 24 that is coaxial with the upper stem hole 15 and communicates with the upper stem hole 15 and has a small diameter and communicates with the through flow path 22 above the middle portion of the through flow path 22 of the ball valve body 20. A bearing portion 25 that is coaxial with the stem hole 24 is formed below the middle portion of the through passage 22 of the ball valve body 20. At a position corresponding to the stem hole 24 and the bearing portion 25 of the through passage 22 of the ball valve body 20, a disk 26 as a second valve body constituting a disk-shaped butterfly valve is disposed. An engagement hole 27 that penetrates in the vertical direction is formed in the center of 26.

An actuator stem 28 is accommodated in the upper stem hole 15 and the stem hole 24 of the valve main body 11. The actuator stem 28 is inserted into the engagement hole 27 of the disk 26 at the lower portion of the actuator stem 28 to be a bearing. A disk engaging portion 29 supported by the portion 25 is formed. The disk 26 can be rotated through the disk engaging portion 29 by rotating the actuator stem 28.
In addition, two annular grooves 30 and 30 for receiving a sealing member (not shown) such as an O-ring are formed on the peripheral surface of the actuator stem 28, and the upper end of the actuator stem 28 is A connecting portion 31 connected to the output shaft of the electric actuator is formed.

A gland 32 for screwing the actuator stem 28 and preventing the actuator stem 28 from falling off is screwed into the upper end portion of the upper stem hole 15.
On the upper surface of the actuator flange 16, the electric actuator 34 is installed with the output shaft 35 connected to the connecting portion 31 of the actuator stem 28 via the spacer 33, and the electric actuator 34 is used for the actuator. The flange 16 is fixed with bolts 36.

  A manual stem 37 is accommodated inside the lower stem hole 17 of the valve body 11, and an upper end portion of the manual stem 37 is engaged with an engagement recess 38 formed on the lower surface of the ball valve body 20. Engagement protrusions 39 to be joined are formed. The ball valve body 20 can be rotated by the rotation of the manual stem 37 with the engagement protrusion 39 of the manual stem 37 engaged with the engagement recess 38 of the ball valve body 20. Has been.

  In this embodiment, the ball valve body 20 is rotatably supported by the actuator stem 28 and the manual stem 37, and the disc 26 is rotatably supported by the actuator stem. Since the rotation axis of the body 20 and the disc 26 is arranged coaxially, the ball valve body 20 and the disc 26 can be easily supported.

One end of the handle 40 is attached to the lower end of the manual stem 37 with a nut 48. A stopper projection (not shown) is formed on the lower surface of the valve body 11 so as to protrude downward. The proximal end portion of the handle 40 abuts on the stopper projection when the handle 40 is rotated. A stopper portion 41 that restricts the rotation angle of 40 is formed.
In the present embodiment, the rotation angle of the handle 40 is approximately 90 ° in accordance with the axial centers of the through flow path 22 and the bypass flow path 23, but may be arbitrarily set within a predetermined angle range. Can do.

  Further, an interlocking mechanism that regulates the removal operation of the inspection plug 19 in conjunction with the turning operation of the handle 40 so that the inspection plug 19 is not accidentally removed when the ball valve body 20 is in the open state. Is preferably provided.

  Next, the operation of this embodiment will be described.

  When performing a normal opening / closing operation, as shown in FIGS. 5 and 6, the ball valve body 20 is disposed so that the through-flow path 22 communicates with the inflow port 13 and the outflow port 14. By operating the actuator 34 and rotating the disk 26 via the actuator stem 28, the flow rate of a heating medium such as cold water or other fluid is adjusted at an arbitrary opening degree.

Next, a procedure for maintaining the composite valve will be described.
First, as shown in FIG. 7 and FIG. 8, the handle 40 is operated to rotate the ball valve body 20 by about 90 ° to close the channel phase between the through channel 22 and the bypass channel 23. change. In this state, the through passage 22 is closed, while the bypass passage 23 communicates with the inflow port 13 and the outflow port 14, and the ball valve body 20 and the ball seats 21 and 21 are in a sealed state. Therefore, the fluid flow is retained via the bypass flow path 23. Subsequently, the electric actuator 34 is operated to rotate the disk 26 and close it.

Thereafter, as shown in FIG. 9, the inspection plug 19 is loosened to leak the fluid enclosed between the valve body 11 and the ball valve body 20, and the inspection plug 19 is removed. Subsequently, the bolt 36 of the electric actuator 34 is removed, and the electric actuator 34 is removed.
Then, the spacer 33 and the gland 32 are removed, and the actuator stem 28 is extracted from the upper stem hole 15. At this time, since the upward movement of the disk 26 is restricted by the ball valve body 20, the disk engaging part 29 of the actuator stem 28 is pulled out from the engaging hole 27 of the disk 26. In this state, the disk 26 is removed from the inspection hole 18 facing the through channel 22 using a jig (not shown), and maintenance such as maintenance, inspection, and replacement of the disk 26 is performed.

  Next, when the disk 26 is assembled after the maintenance is completed, the disk 26 is inserted from the inspection hole 18 with a jig (not shown), and the engagement hole 27 is held in alignment with the axial direction of the stem hole 24. In this state, the actuator stem 28 is inserted from the upper stem hole 15, and the disk engaging portion 29 of the actuator stem 28 is inserted into the engaging hole 27 of the disk 26. Thereafter, the actuator stem 28 is attached by the gland 32, and the electric actuator 34 is attached via the spacer 33.

  Therefore, in the present embodiment, the bypass flow path 23 for bypassing the inflow port 13 and the outflow port 14 is formed. Therefore, by closing the ball valve body 20, the fluid flow is not hindered. Therefore, maintenance and inspection of the disk 26 can be easily performed. Further, a bypass passage 23 for bypassing the inlet 13 and the outlet 14 is formed integrally with the ball valve body 20 provided with a through passage 22 for adjusting the flow rate, and a separate bypass flow is provided in the valve body 11. Since there is no need to provide the passage 23, the composite valve having the bypass passage 23 can be obtained with a compact structure. As a result, when the ball valve body 20 is closed and the disk 26 is maintained and inspected, the flow of the fluid is not obstructed by the bypass passage 23, so that bypass piping is not required as in the prior art. It can be easily installed at a place, and the flow path installation cost can be reduced.

10 and 11 show a third embodiment of the present invention, in which a bypass channel can be closed by attaching a bypass channel plug to the bypass channel. .
In the present embodiment, a plug hole 42 bulging in a direction opposite to the bulging direction of the inspection hole 18 is formed on the opposite side of the inspection hole 18 of the valve body 11. A plug 43 for closing operation is attached to the hole 42. Furthermore, an internal thread is formed on the inner surface of the bypass flow path 23 on the plug hole 42 side, and a bypass flow path plug 44 is screwed and fixed to the internal thread of the bypass flow path 23.

  The reason why the bypass channel 23 can be closed in this way is that, for example, in an air conditioning system or the like, it is necessary to perform maintenance of members other than the composite valve, such as an air conditioner coil, on the downstream side of the composite valve. In some cases, the disk 26 alone may not be able to completely seal the flow path. In the state where the bypass channel 23 is closed with the bypass channel blocking plug 44 as in the present embodiment, the bypass channel 23 is opposed to the inlet 13 and the outlet 14, and the through channel 22 is connected to the inlet 13 and By making it the state removed from the outflow port 14, complete sealing becomes possible. It should be noted that whether the bypass channel blocking plug 44 is attached in the normal state (attached state) or removed (de-attached state) is arbitrary, but is usually kept in the attached state and maintenance of the disc 26 is performed. In some cases, it is advantageous to manage the parts of the bypass flow path plug 44 for the first time to be in the detached state.

Further, when this composite valve is applied to an air conditioning system or the like, the fluid is hot water or cold water, so that it is necessary to cover the entire composite valve with a heat insulating material to reduce the heat radiation amount.
Therefore, in this embodiment, in order to ensure the space covered with the heat insulating material, the length dimension of the upper stem hole 15 portion is formed to be large. In addition, when covering with a heat insulating material, the handle is obstructed, and there is a possibility that condensation occurs in the handle portion, so that the handle is omitted.

  That is, in this embodiment, a stopper plate 45 for restricting the rotation amount of the manual stem 37 is attached to the lower end portion of the manual stem 37 instead of the handle by the C-type retaining ring 46, and the manual stem A holding plate 47 that prevents the manual stem 37 from rotating is fixed to the lower end of the plate 37 with screws 48. In the present embodiment, the rotation amount of the manual stem 37 regulated by the stopper plate 45 is set to approximately 90 ° for reliable conversion of the flow path.

  Since other configurations are the same as those of the first embodiment, the same parts are denoted by the same reference numerals and the description thereof is omitted.

  Next, the operation of this embodiment will be described.

  Also in the present embodiment, as in the above-described embodiment, when performing a normal opening / closing operation, the ball valve body 20 is arranged so that the through flow path 22 communicates with the inflow port 13 and the outflow port 14, and in this state By operating the electric actuator 34 and rotating the disk 26 via the actuator stem 28, the flow rate is adjusted at an arbitrary opening degree.

  When checking the composite valve, the screw 48 is loosened to remove the holding plate 47, a predetermined tool is attached to the lower end of the manual stem 37, and the manual stem 37 is rotated about 90 °. The ball valve body 20 is closed and the electric actuator 34 is operated to close the disk 26. At this time, in this embodiment, since the bypass flow path 23 is closed by the bypass flow path closing plug 44, the fluid can be completely sealed. When the bypass channel 23 is not blocked with the bypass channel plug 44, the bypass channel 23 communicates with the inlet 13 and the outlet 14 and the fluid flow is maintained as it is, as in the above embodiment. The

  Thereafter, similarly, the inspection plug 19 is loosened, the fluid enclosed between the valve body 11 and the ball valve body 20 is removed, and the inspection plug 19 is removed. Subsequently, the electric actuator 34, the spacer 33 and the gland 32 are removed, and the actuator stem 28 is extracted from the upper stem hole 15, and then the disc 26 is removed from the inspection hole 18 facing the through channel 22 to maintain the disc 26. I do.

  Therefore, in the present embodiment as well, the disk 26 can be easily maintained and inspected with the fluid completely sealed by closing the ball valve body 20 in the same manner as in the previous embodiment. In addition, since the bypass passage 23 is closed with the bypass passage closing plug 44, for example, in an air conditioning system or the like, maintenance of members other than the composite valve such as an air conditioner coil located downstream of the composite valve is performed. Even when it is necessary to perform the above operation, the ball valve body 20 is closed, and the bypass flow passage closing plug 44 is opposed to the inflow port 13 so that complete sealing is possible.

  In the present embodiment, the bypass passage 23 for bypassing the inlet 13 and the outlet 14 is formed integrally with the ball valve body provided with the through passage 22 for adjusting the flow rate. In addition, since it is not necessary to provide a separate bypass flow path 23, a composite valve having the bypass flow path 23 can be obtained with a compact structure.

  In the present embodiment, the plug hole 42 is formed in the valve main body 11 and the bypass channel closing plug 44 is attached to and detached from the plug hole 42. The diameter of 18 may be formed large enough to expose the through flow path 22 and the bypass flow path 23, and the bypass flow path closing plug 44 may be attached and detached through the inspection hole 18.

  Moreover, in each said embodiment, although the one bypass flow path 9 and 23 is provided, you may make it provide a some bypass flow path, for example, and the cross-sectional shape of a bypass flow path is also set. The shape is not limited to a circle, and may be an elliptical shape or any other shape.

  In addition, it is advantageous that the inspection plug 19, the closing operation plug 43, and the bypass flow path closing plug 44 are all formed in a tapered shape and screwed into the respective holes.

  The present invention is not limited to the above-described embodiment, and various modifications can be made based on the gist of the present invention.

It is operation | movement explanatory drawing of the opening / closing control state which shows 1st Embodiment of the composite valve which concerns on this invention. FIG. 2 is a side view of FIG. 1 showing a first embodiment of the composite valve according to the present invention. It is operation | movement explanatory drawing which shows the maintenance and inspection state which shows 1st Embodiment of the composite valve which concerns on this invention. FIG. 4 is a side view of the composite valve according to the present invention as seen from the side B of FIG. 3 showing the first embodiment. It is front sectional drawing of the open / close control state which shows 2nd Embodiment of the composite valve which concerns on this invention. It is side surface sectional drawing of the opening-closing control state which shows 2nd Embodiment of the composite valve which concerns on this invention. It is front sectional drawing of the maintenance / inspection state which shows 2nd Embodiment of the composite valve which concerns on this invention. It is side surface sectional drawing of the maintenance and inspection state which shows 2nd Embodiment of the composite valve which concerns on this invention. It is the schematic which shows the maintenance and inspection procedure in 2nd Embodiment of the composite valve which concerns on this invention. It is front sectional drawing of the opening-closing control state which shows 3rd Embodiment of the composite valve which concerns on this invention. It is side surface sectional drawing of the opening-closing control state which shows 3rd Embodiment of the composite valve which concerns on this invention.

Explanation of symbols

11 Valve Body 12 Lid 13 Inlet 14 Outlet 15 Upper Stem Hole 16 Actuator Flange 17 Lower Stem Hole 18 Inspection Hole 19 Inspection Plug 20 Ball Valve Body 22 Through-Flow Path 23 Bypass Channel 24 Stem Hole 26 Disc 28 Actuator Stem 32 Gland 33 Spacer 34 Electric Actuator 37 Manual Stem 40 Handle 42 Plug Hole 43 Bypass Channel Closure Plug 44 Closure Operation Plug 45 Stopper Plate

Claims (6)

A valve body having a fluid inlet and outlet;
A first valve body installed inside the valve body for opening and closing the fluid flow path connecting the inlet and the outlet of the valve body;
A through-flow passage formed in the first valve body and constituting a flow passage of the fluid;
A second valve body installed inside the through-flow channel to open and close the fluid flow channel;
A bypass passage formed in the first valve body and constituting the fluid passage when the first valve body is closed; and
And a hole for checking for servicing the communication with the second valve element in the through passage when said first valve body is closed,
Each of the first valve body and the second valve body is a rotary valve,
The bypass flow path, wherein the first valve body is communicated with the flow path between the inlet and outlet of the valve body when in the closed state, fluid flows during inspection of the second valve body And compound valve.   The diameter-enlarged part formed by making an inner diameter larger than the said inflow port and the said outflow port is formed in the inner part from the said inflow port and the said outflow port of the said valve | bulb main body. Composite valve.   3. The composite valve according to claim 1, wherein the rotation shafts of the first valve body and the second valve body are arranged coaxially. 4.   The composite valve according to any one of claims 1 to 3, wherein an inspection plug is detachably attached to the inspection hole.   The composite valve according to any one of claims 1 to 4, wherein a bypass channel closing plug is detachably attached to the bypass channel.   6. The composite valve according to claim 5, wherein a plug hole for attaching and detaching the bypass passage blocking plug is formed in the valve body.

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