Flow regulating valve

Abstract

A flow regulating valve (10) is provided with a needle valve (34) facing a fluid passage (18) of a main body (12), and has a handle (56) for manual rotation operation, an electric motor (58) capable of remote operation, and a power transmission mechanism that selectively switches the rotation operation force of the handle and the drive force of the electric motor and transmits to the needle valve. The switching is performed by moving the handle in the rotation axis direction.

Description

Technical Field

[0001] This invention relates to a flow regulating valve for adjusting the flow rate of a fluid passage. Background Technology

[0002] Conventionally, as a means of regulating the speed of a fluid pressure cylinder, a flow control valve (speed controller) capable of adjusting the flow path area by manual operation is known. The flow control valve is, for example, installed in a flow path connecting the fluid pressure cylinder and a fluid supply source, or in a flow path connecting the fluid pressure cylinder to a discharge port.

[0003] In addition, as disclosed in Japanese Patent No. 5061258, an electric needle valve is also known that can adjust the valve opening by means of an electric motor and remotely control the flow rate of fluid supplied to the actuator.

[0004] Even for flow control valves that adjust valve opening by remotely controlling the motor, manual adjustment of the valve opening is still necessary to confirm operation when starting the equipment. Generally, the assembly process for production equipment follows this sequence: mechanical assembly, air pressure piping, electrical wiring, and downloading the program to the PLC. Remote operation signals can only be sent to the motor after the program download is complete. The operation confirmation required while the equipment is running must be performed manually in the preceding stages.

[0005] Furthermore, remote operation via PLC typically requires a system operator or software technician. There are situations where the personnel responsible for the device's protection (maintenance) may lack the necessary skills for remote operation. If the flow control valve opening cannot be manually adjusted, assistance from a system operator or software technician must be sought, which will be time-consuming.

[0006] For flow control valves that use a drive motor to adjust the valve opening, it is natural to have a manually operated operating part. However, when using a small motor with a reducer having a large reduction ratio, this operating part becomes difficult to operate manually when it is connected to the driven side of the reducer. Summary of the Invention

[0007] As mentioned above, there is a need for a flow control valve capable of adjusting the valve opening both manually and electrically. However, practical products have not yet been sufficiently developed. This invention aims to solve the aforementioned technical problems.

[0008] The flow regulating valve of the present invention has a needle valve arranged in the fluid passage facing the main body. The flow regulating valve includes: a handle for manual rotation operation; an electric motor capable of remote operation; and a power transmission mechanism that selectively switches the rotational force of the handle and the driving force of the electric motor and transmits them to the needle valve. The flow regulating valve performs this switching by moving the handle in the direction of the rotation axis.

[0009] The flow control valve described above allows for easy manual handle operation regardless of the motor specifications. Furthermore, its operability is excellent because the push / pull action that moves the handle along the rotation axis selectively switches between the handle's rotational force and the motor's driving force. Moreover, since the handle does not rotate with the motor, the safety of on-site personnel is ensured.

[0010] The flow regulating valve of the present invention includes a power transmission mechanism that selectively switches between the rotational operating force of the handle and the driving force of the electric motor and transmits them to the needle valve. Therefore, regardless of the specifications of the electric motor, manual handle operation can be easily achieved, while ensuring the safety of on-site personnel. Furthermore, since the switching can be performed by a push / pull action that moves the handle in the direction of rotation, operability is excellent.

[0011] The above-mentioned objects, features, and advantages of the present invention can be readily understood by referring to the accompanying drawings and the following description of embodiments. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the flow control valve according to an embodiment of the present invention when the handle is in the lower limit position and the valve opening is at its maximum (fully open state).

[0013] Figure 2 This refers to the state when the handle is in the lower limit position and the valve opening is zero (fully closed). Figure 1 A cross-sectional view of a flow control valve.

[0014] Figure 3 It is Figure 1 The flow control valve is shown in the diagram as a component or assembly of components.

[0015] Figure 4 When the controller is in the upper limit position Figure 1 A cross-sectional view of the main parts of a flow control valve.

[0016] Figure 5 It is the state when the handle is pressed down from the upper limit position to the lower limit position. Figure 1 A cross-sectional view of the main parts of a flow control valve.

[0017] Figure 6It's the state when the handle is pulled up from the lower limit to the upper limit. Figure 1 A cross-sectional view of the main parts of a flow control valve. Detailed Implementation

[0018] The flow regulating valve 10 of this invention is used to regulate the flow rate of fluids such as compressed air. In the following description, when language related to directions such as up, down, left, and right is used, for convenience, directions on the drawing are used, and the actual configuration of each component is not limited.

[0019] like Figure 1 and Figure 3 As shown, the flow regulating valve 10 includes a main body 12, a cover 14, a valve seat body 28, a needle valve 34, a handle 56, a stepper motor (electric motor) 58, and a power transmission mechanism. The power transmission mechanism is a mechanism that selectively switches the rotational operating force of the handle 56 and the driving force of the stepper motor 58 and transmits them to the needle valve 34, which will be described in detail below. The stepper motor 58 has a built-in reducer (not shown). In this embodiment, although a stepper motor 58 is used as an electric motor, other types of electric motors may also be used.

[0020] The box-shaped main body 12 has a receiving chamber 40, which cooperates with the cover 14 to house the stepper motor 58 and the power transmission mechanism. The cover 14 is mounted on the support frame 60, which will be described later. The upper surface of the cover 14 is recessed downwards near the center in its longitudinal direction. The bottom surface of this recess 14a has an opening at the center. A cylindrical handle support 16, which rises upwards from the opening edge of the recess 14a, is integrally provided with the cover 14.

[0021] The lower part of the main body 12 has a fluid passage 18 that is open at both ends and extends in the left-right direction. A first port 20, which is open at one end of the fluid passage 18, and a second port 22, which is open at the other end of the fluid passage 18, are respectively connected to external piping (not shown). In this embodiment, the flow rate can be adjusted when the fluid flows from the first port 20 toward the second port 22 by the action of the one-way valve 30, which will be described later.

[0022] The valve seat body 28 and the needle valve 34 are arranged to intersect with the fluid passage 18. A cylindrical guide wall 24 for guiding fluid is disposed at the center of the fluid passage 18 along its length. The axis of the guide wall 24 is aligned with the axes of the valve seat body 28 and the needle valve 34. The guide wall 24 has a first window 24a above the first port 20. The guide wall 24 has a second window 24b below the second port 22. The first port 20 is connected to the second port 22 via the first window 24a and the second window 24b. The guide wall 24 extends toward the receiving chamber 40, and this extension forms a support wall 26 that supports the valve seat body 28.

[0023] A cylindrical valve seat body 28 is fitted and fixed to the inner side of the support wall 26 of the main body 12 at its central support portion 28a along its length. A needle valve 34 is inserted / positioned inside the valve seat body 28 in a manner that allows it to move in the X direction, which is its axial direction. The tip of the needle valve 34 faces the fluid passage 18. The outer periphery near the tip of the needle valve 34 has a head-narrowed conical surface 34a.

[0024] The valve seat body 28 has multiple transverse holes 28b penetrating the sidewall of the valve seat body 28 at the portion below the support portion 28a. The valve seat body 28 has a valve seat 28c at the portion below these transverse holes 28b, capable of abutting against the conical surface 34a of the needle valve 34. When the needle valve 34 is disengaged from the valve seat 28c, the first window portion 24a communicates with the second window portion 24b via the transverse holes 28b of the valve seat body 28 and the lower end opening 28e of the valve seat body 28. Figure 2 As shown, when the needle valve 34 is in contact with the valve seat 28c, the communication between the first window 24a and the second window 24b via the transverse hole 28b of the valve seat body 28 and the lower end opening 28e of the valve seat body 28 is blocked.

[0025] A one-way valve 30 is installed on the outer periphery of the lower end of the valve seat body 28, capable of pressing against the inner periphery of the guide wall 24 of the main body 12. The one-way valve 30 prevents fluid from flowing from the first window 24a to the second window 24b through the gap between the lower end of the valve seat body 28 and the guide wall 24. The one-way valve 30 allows fluid to flow from the second window 24b to the first window 24a through the aforementioned gap. When the needle valve 34 is abutting against the valve seat 28c, the flow of fluid from the first port 20 to the second port 22 is blocked. When the needle valve 34 is away from the valve seat 28c, fluid flows from the first port 20 to the second port 22 at a flow rate corresponding to the flow path area that varies according to the distance of departure.

[0026] On the inner surface of the valve seat body 28, above the support portion 28a, a cylindrical collar 38 supporting the upper end of the needle valve 34 is fixed. The outer periphery of the needle valve 34 and the inner periphery of the collar 38 have two sets of planar portions 34c and 38a that abut against each other. Thus, the needle valve 34 is supported by the collar 38, restricting its rotation about the axis while allowing it to move in the axial direction. In this embodiment, two sets of planar portions are used as anti-rotation units for the needle valve 34 relative to the collar 38. However, a single set of planar portions (D-shaped cut), splines, or other means can also be used.

[0027] An annular sealing member 32 is installed on the outer periphery of the support portion 28a of the valve seat body 28, abutting against the inner periphery of the support wall 26 of the body portion 12. Additionally, an annular needle gasket 36 is disposed on the outer periphery of the needle valve 34, slidingly contacting the inner periphery of the support portion 28a of the valve seat body 28. The fluid passage 18 is hermetically separated from the receiving chamber 40 by the sealing member 32 and the needle gasket 36. Because the needle valve 34 is constructed without rotating around an axis, the load applied to the needle gasket 36 is reduced, and the durability of the needle gasket 36 is improved.

[0028] The power transmission mechanism includes a feed screw 42, a rod 44, a handle pressure block 46, a valve gear 48, and a motor gear 50. The rotational force of the handle 56 is transmitted to the needle valve 34 via the handle pressure block 46, the rod 44, and the feed screw 42. The driving force of the stepper motor 58 is transmitted to the needle valve 34 via the motor gear 50, the valve gear 48, the rod 44, and the feed screw 42. In other words, the power transmission path between the handle 56 and the needle valve 34 is formed by the handle pressure block 46, the rod 44, and the feed screw 42. The power transmission path between the stepper motor 58 and the needle valve 34 is formed by the motor gear 50, the valve gear 48, the rod 44, and the feed screw 42. The power transmission mechanism will be described in detail below.

[0029] The feed screw 42 has a flange 42a at its center along its length, and an external thread 42b on the outer periphery of the portion below the flange 42a. The portion of the feed screw 42 above the flange 42a is supported by a bearing 52 provided in the upper opening 28d of the valve seat body 28, allowing it to rotate. The upper end of the feed screw 42 protrudes upward from the bearing 52 and is fitted into the inner side of the cylindrical portion 44b of the rod 44, which will be described later.

[0030] The needle valve 34 has a bottomed threaded hole 34b opening at its upper end. The lower portion of the feed screw 42 engages with the threaded hole 34b. The flange 42a of the feed screw 42 is configured to be sandwiched between the lower surface of the bearing 52 and the upper surface of the collar 38. Thus, the movement of the feed screw 42 in the X direction, which is the axial direction, is restricted. When the feed screw 42 rotates, the needle valve 34, whose rotation about its axis is restricted, moves in the axial direction.

[0031] The rod 44 has a plate-shaped flange portion 44a extending horizontally, a cylindrical portion 44b extending downward from the flange portion 44a and opening at its top, and a protrusion portion 44c protruding upward from the flange portion 44a. The cylindrical portion 44b of the rod 44 is connected to the upper end of the feed screw 42 by a predetermined anti-rotation unit. Thus, the feed screw 42 and the rod 44 rotate integrally, and the rod 44 can move relative to the feed screw 42 in the X direction, which is the axial direction. In this embodiment, although two sets of planar portions are used as the anti-rotation unit, a single set of planar portions (D-shaped cut), splines, or other means can also be used.

[0032] The upward movement of rod 44 is restricted by the flange portion 44a of rod 44 abutting against the stepped portion 16a protruding from the inner periphery of the handle support portion 16 of cover 14. The outer periphery of the upper end of the cylindrical portion 44b of rod 44 has a spline 44d that engages with the spline 48d of valve gear 48 described later (see reference). Figure 4 A handle pressure block 46 is fixed to the protrusion 44c of the rod 44 by a mounting thread 54. The outer periphery of the handle pressure block 46 has a spline 46a that engages with the first spline 56f of the handle 56 described later (see reference). Figure 5 ).

[0033] The handle 56 has an annular seat 56a, an outer cylindrical portion 56b extending downward from the outer periphery of the seat 56a, and an inner cylindrical portion 56c extending downward from the inner periphery of the seat 56a. The lower end of the outer cylindrical portion 56b has a rib 56d protruding radially inward. The lower end of the inner cylindrical portion 56c has a flange 56e extending radially inward. Figure 4 As shown, the inner periphery of the lower end of the inner cylinder portion 56c has a first spline 56f that engages with the spline 46a of the handle pressure block 46. In addition, the outer periphery of the upper end of the inner cylinder portion 56c has a second spline 56g that engages with the spline 16d of the inner periphery of the handle support portion 16 of the cover 14.

[0034] The handle 56 is capable of pushing / pulling, and can move in the X direction (vertical direction) between its upper limit position (upward moving end) and lower limit position (downward moving end). When the upper surface of the flange 56e of the handle 56 abuts against the lower surface of the handle block 46 and the handle block 46 is pulled up, the flange portion 44a of the rod 44, which moves integrally with the handle block 46, abuts against the stepped portion 16a of the handle support portion 16. As a result, the handle 56 reaches the upper limit position (see reference...). Figure 4 ).

[0035] The handle support portion 16 enters the space between the inner cylinder portion 56c and the outer cylinder portion 56b of the handle 56. When the lower surface of the seat portion 56a of the handle 56 abuts against the upper end of the handle support portion 16, the handle 56 reaches the lower limit position (see reference). Figure 1When the handle 56 is in the upper limit position, it protrudes significantly upward from the cover 14, making rotation easy. When the handle 56 is in the lower limit position, it enters the recess 14a of the cover 14.

[0036] When the handle 56 moves upward (in the first direction), the first spline 56f of the inner cylinder 56c engages with the spline 46a of the handle pressure block 46. As a result, the handle 56, the handle pressure block 46, and the rod 44 can rotate as a unit. Furthermore, when the handle 56 moves to its upper limit position, the engagement between the second spline 56g of the inner cylinder 56c and the spline 16d of the handle support 16 is released.

[0037] When the handle 56 moves downward (in the second direction), the engagement between the first spline 56f of the inner cylinder 56c and the spline 46a of the handle pressure block 46 integrated with the rod 44 is released. When the handle 56 moves downward, the second spline 56g of the inner cylinder 56c engages with the spline 16d of the handle support 16 to prevent rotation of the handle 56. Furthermore, when the second spline 56g of the inner cylinder 56c begins to engage with the spline 16d of the handle support 16, the flange 56e of the inner cylinder 56c abuts against the flange 44a of the rod 44. By pressing the flange 44a downward through the flange 56e, the rod 44 and the handle 56 move downward together.

[0038] The outer periphery of the handle support portion 16 of the cover 14 has a first rib 16b and a second rib 16c arranged at predetermined intervals in the vertical direction. The first rib 16b and the second rib 16c engage with the rib 56d of the outer cylindrical portion 56b of the handle 56. When the handle 56 is pulled up to the upper limit position, the rib 56d of the handle 56 elastically engages with the first rib 16b of the handle support portion 16. When the handle 56 is pressed down to the lower limit position, the rib 56d of the handle 56 elastically engages with the second rib 16c of the handle support portion 16. Therefore, unless an external force is applied, the handle 56, when it reaches the upper limit position or the lower limit position, is stably held in the upper limit position or the lower limit position.

[0039] A support frame 60 supporting the stepper motor 58 is horizontally disposed in the housing 40. The support frame 60 is mounted to the main body 12 by a fixing unit (not shown). A valve gear 48 meshes with a motor gear 50 mounted on the output shaft 58a of the stepper motor 58, thereby rotating in conjunction with the output shaft 58a of the stepper motor 58. The valve gear 48 and the motor gear 50 are disposed on the upper surface of the support frame 60. The valve gear 48 is composed of a gear portion 48a having teeth on its outer periphery and a shaft portion 48b protruding downward from the gear portion 48a. The gear portion 48a and the shaft portion 48b have a central hole 48c passing through in the X direction, which is their axial direction. The inner periphery of the gear portion 48a has a spline 48d that engages with the spline 44d of the rod 44 (see reference). Figure 4 ).

[0040] The support frame 60 has a through hole 60a through which the feed screw 42 and rod 44 are inserted. The upper part of the through hole 60a is enlarged to form a first recess 60b supporting the shaft portion 48b of the valve gear 48. The lower part of the through hole 60a is stepped enlarged to form a second recess 60c for the upper end of the valve seat body 28 to be inserted. The shaft portion 48b of the valve gear 48 is inserted into the first recess 60b. The protrusion 48e on the upper surface of the gear portion 48a abuts against the cover 14. Thus, the valve gear 48 is supported such that its movement in the X direction, which is the axial direction, is restricted, and it can rotate about the axis. The support frame 60 is positioned inside the receiving chamber 40 by the upper end of the valve seat body 28 fitting into the second recess 60c of the support frame 60.

[0041] The cylindrical portion 44b of rod 44 is inserted into the central hole 48c of valve gear 48 and the insertion hole 60a of support frame 60. When rod 44 is moved downward by pressing down handle 56, spline 44d of rod 44 engages with spline 48d of valve gear 48. Thus, the driving force of stepper motor 58 is transmitted to feed screw 42 via motor gear 50, valve gear 48, and rod 44. On the other hand, when rod 44 is moved upward by pulling up handle 56, the engagement between spline 44d of rod 44 and spline 48d of valve gear 48 is released.

[0042] A base plate 62, perpendicular to the support frame 60, is disposed in the housing chamber 40. Electronic components for driving the stepper motor 58 are mounted on the base plate 62. A pin-shaped terminal 64, erected on the base plate 62, extends inward toward the inner side of a cylindrical connecting portion 66 provided on the side of the main body 12. Wiring (not shown) is provided between the base plate 62 and the stepper motor 58. The stepper motor 58 is driven by a remote operation signal supplied from the terminal 64.

[0043] The flow regulating valve 10 of this embodiment is configured as described above. Hereinafter, the cases of adjusting the valve opening by remote operation and the cases of adjusting the valve opening by manual operation will be described. Figure 4 As shown, the state where the handle 56 is in the upper limit position is set as the initial state.

[0044] To remotely drive the stepper motor 58 and adjust the valve opening, the handle 56, which is in the upper limit position, is pressed down to the lower limit position. For example... Figure 5As shown, when the handle 56 is pressed down, the engagement between the first spline 56f of the inner cylinder portion 56c of the handle 56 and the spline 46a of the handle pressure block 46 is released, and the rod 44, which is integral with the handle pressure block 46, is released from its connection with the handle 56. That is, the power transmission path between the handle 56 and the needle valve 34 is cut off between the handle 56 and the handle pressure block 46. Furthermore, appropriate friction is applied at the location where the upper end of the feed screw 42 engages with the cylindrical portion 44b of the rod 44, or at the location where the cylindrical portion 44b of the rod 44 passes through the central hole 48c of the valve gear 48. Therefore, when the handle 56 is pressed down, the rod 44 does not immediately move downward.

[0045] In addition, almost simultaneously with the release of the engagement between the first spline 56f of the handle 56 and the spline 46a of the handle pressure block 46, the second spline 56g of the inner cylinder portion 56c of the handle 56 begins to engage with the spline 16d of the handle support portion 16, thus preventing the handle 56 from rotating.

[0046] Furthermore, when the handle 56 is pressed down to near the lower limit position, the lever 44 is pressed down by the flange 56e of the handle 56, and the spline 44d of the lever 44 engages with the spline 48d of the valve gear 48 (see reference). Figure 1 This results in a state where the driving force of the stepper motor 58 can be transmitted to the needle valve 34 via the motor gear 50, valve gear 48, rod 44, and feed screw 42. That is, the power transmission path between the stepper motor 58 and the needle valve 34 is continuous.

[0047] As shown above, when the handle 56 is pressed down, the power transmission path between the handle 56 and the needle valve 34 is interrupted midway, preventing the handle 56 from rotating. Furthermore, if the handle 56 is pressed down to its lower limit position, the power transmission path between the stepper motor 58 and the needle valve 34 becomes continuous. In this state, the stepper motor 58 can be driven remotely to move the needle valve 34 in the axial direction, thereby adjusting the valve opening.

[0048] Next, in order to manually adjust the valve opening, pull the handle 56 from the lower limit position to the upper limit position. For example... Figure 6 As shown, when the handle 56 is pulled upwards, the first spline 56f of the inner cylinder 56c engages with the spline 46a of the handle pressure block 46, thus connecting the handle 56, the handle pressure block 46, and the rod 44 integrally in the rotational direction. This ensures a continuous power transmission path between the handle 56 and the needle valve 34. However, if the handle 56 is not pulled up to near its upper limit position, the engagement between the second spline 56g of the inner cylinder 56c and the spline 16d of the handle support 16 remains. Therefore, the handle 56 cannot be rotated at this time.

[0049] Next, when the handle 56 is pulled up to near its upper limit position, the handle pressure block 46 is pushed upward by the flange 56e of the handle 56. This releases the engagement between the spline 44d of the rod 44, which moves integrally with the handle pressure block 46, and the spline 48d of the valve gear 48 (see reference). Figure 4 Additionally, the engagement between the second spline 56g of the inner cylinder portion 56c of the handle 56 and the spline 16d of the handle support portion 16 is released. The engagement between the spline 44d of the rod 44 and the spline 48d of the valve gear 48 is released, thereby cutting off the power transmission path between the stepper motor 58 and the needle valve 34 midway.

[0050] Therefore, if the handle 56 is pulled up to the upper limit position, the handle 56 can be rotated manually. Thus, by rotating the handle 56, the needle valve 34 can be moved along the axial direction via the handle pressure block 46, the rod 44 and the feed screw 42, thereby adjusting the valve opening.

[0051] It is conceivable that, during the process of a worker pulling up handle 56, before the engagement between the spline 48d of valve gear 48 and the spline 44d of rod 44 is disengaged, the stepper motor 58 is driven by a remote operation signal, and this driving force is transmitted to handle 56 via rod 44. Even in this case, the second spline 56g of the inner cylinder portion 56c of handle 56 engages with the spline 16d of handle support portion 16. Therefore, handle 56 will not rotate accidentally, thus ensuring the safety of the worker holding handle 56.

[0052] The flow regulating valve 10 according to this embodiment includes a power transmission mechanism that selectively switches between the rotational operating force of the handle 56 and the driving force of the stepper motor 58, transmitting them to the needle valve 34. Therefore, regardless of the specifications of the stepper motor 58, manual handle operation can be easily achieved, ensuring the safety of on-site personnel. Furthermore, since the switching can be performed by a push / pull action that moves the handle 56 in the rotational axis direction, operability is excellent.

[0053] This invention is not limited to the above-described embodiments; various structures can be adopted as long as they do not depart from the spirit of this invention.

Claims

1. A flow control valve (10) having a needle valve (34) disposed in a fluid passage (18) facing a main body (12), characterized in that it comprises: The flow control valve includes a handle (56) for manual rotation; an electric motor (58) capable of remote operation; and a power transmission mechanism that selectively switches the rotational force of the handle and the driving force of the electric motor and transmits them to the needle valve, the flow control valve performing this switching by moving the handle in the direction of rotation. The handle is movable along its rotation axis in a first direction and a second direction, which are opposite to each other. When the handle is pulled up and moved in the first direction, the power transmission path between the handle and the needle valve is continuous, and the power transmission path between the motor and the needle valve is interrupted midway. When the handle is pressed down and moved in the second direction, the power transmission path between the handle and the needle valve is interrupted midway, and the power transmission path between the motor and the needle valve is continuous. The handle and the handle support portion (16) of the main body are provided with splines that can engage with each other. When the handle moves from the moving end in the first direction to the second direction, the splines of the handle engage with the splines of the handle support portion to prevent the handle from rotating.

2. The flow regulating valve according to claim 1, characterized in that, The device includes a cover (14) that houses the electric motor and the power transmission mechanism together with the main body. The cover has a recess (14a) into which the handle enters when the handle is moved to the moving end in the second direction.

3. The flow regulating valve according to claim 1, characterized in that, The power transmission mechanism includes a feed screw (42) that is screwed into the needle valve. The rotation of the needle valve around its axis is restricted, and the movement of the feed screw in the axial direction is restricted. When the feed screw rotates, the needle valve moves in the axial direction.

4. The flow regulating valve according to claim 3, characterized in that, The power transmission mechanism includes a rod (44) that is movable in the axial direction of the feed screw, which rotates integrally with the rod. The rotational force of the handle and the driving force of the motor are transmitted to the needle valve via the rod and the feed screw.

5. The flow regulating valve according to claim 4, characterized in that, When the handle moves from the moving end in the second direction to the first direction, the spline of the handle engages with the spline of the handle pressure block (46) fixed to the rod. When the handle moves in the second direction, the rod moves in the same direction. The spline of the rod engages with the spline of the valve gear (48). The valve gear is connected to the output shaft (58a) of the motor.

6. The flow regulating valve according to claim 5, characterized in that, When the rod, which is integral with the handle pressure block that moves against the handle, abuts against the stepped portion (16a) of the handle support, the handle reaches the moving end in the first direction; when the handle abuts against the end of the handle support, the handle reaches the moving end in the second direction.

7. The flow regulating valve according to claim 6, characterized in that, When the handle reaches the moving end in the first direction, the rib (56d) of the handle is elastically engaged with the first rib (16b) of the handle support. When the handle reaches the moving end in the second direction, the rib of the handle is elastically engaged with the second rib (16c) of the handle support.

8. The flow regulating valve according to claim 3, characterized in that, The needle valve is inserted into and disposed on the inner side of the valve seat body (28) fixed in the main body, and a needle pad (36) is installed on the outer periphery of the needle valve and slides in contact with the valve seat body.

Images