WO2016107494A1

WO2016107494A1 - Valve and spool assembly thereof

Info

Publication number: WO2016107494A1
Application number: PCT/CN2015/098738
Authority: WO
Original assignee: 上海鸿研物流技术有限公司
Priority date: 2014-12-31
Filing date: 2015-12-24
Publication date: 2016-07-07
Also published as: CN104595517A; CN104595517B

Abstract

A valve and a spool assembly thereof. The spool assembly comprises a spool (2), a driving member (5), a control member, and a clutch (7). The clutch has a connecting structure, a clutch structure, and a resetting structure. The connecting structure is located in a recess and is connected to the spool or the driving member (5). When a valve rod (4) rotates to open the valve or when the valve rod rotates to close the valve and before the spool reaches a preshutdown position, the clutch is connected to the spool and the driving member at the same time, making the driving member rotate synchronously with the spool around a common axis. The valve rod rotates the valve, and when the spool reaches the preshutdown position, the valve rod continues to rotate, and a clutch structure of the clutch enables the driving member and the spool to rotate and separate synchronously under the effect of the control member, so as to convert the rotation of the spool around the common axis into a radial movement of the spool pressing against a valve base of the valve. The spool assembly and the valve not only have small opening and closed torques, but also a simple structure, an excellent manufacturing process and good sealing performance and is easy to operate.

Description

Valve and its spool assembly

Technical field

The present invention relates to a spool assembly and a valve using the same, and more particularly to a built-in or external low torque valve for use in a composite intermediate bulk container (IBC).

Background technique

In order to optimize the technical parameters such as the diameter, pressure, torque and life of the ball valve, various valve composite opening and closing mechanisms have appeared in recent years.

Chinese Patent Application No. 200720082066 discloses a low torque ball valve that provides a low torque ball valve including a valve body, a valve ball, a valve seat, a bearing seat, a valve stem, a drive, and a ball bearing connection. The disadvantage of the ball valve is that the structure of the driving device is complicated, and the external space of the valve body is extremely occupied; the driving device involves many components and the assembly process is complicated; the opening and closing rotation angle is 180 degrees; the working space formed by the valve stem and the driving device is sealed. The process requirements are very high, and the traditional sealing methods and processes are prone to leakage; in addition, the processing cost is high and it is not suitable for environmental protection purposes.

Recently, a guide groove type lifting rod ball valve has been developed at home and abroad. The valve stem has an S-shaped guiding groove, which cooperates with the guide pin to drive the ball out of the valve seat when the valve stem is raised, and then rotates 90° counterclockwise to fully open the valve. . When the valve stem is lowered, the ball is rotated 90° clockwise and then pressed against the valve seat to close the valve. The disadvantage of the valve is that the valve stem has a long S-shaped guiding groove. When the rotary opening and closing, the valve stem needs to be spirally raised or lowered in the guiding groove, so the guiding groove has a large space and a large rotation angle.

Chinese Patent Application No. 99124192.4 discloses a disc-shaped double-track rotary and hoisted valve opening and closing structure, which is composed of a fixed disc, a rotating disc and a limit pin, when the external force drives the valve stem together with the rotating disc. The position pin rotates clockwise along the trajectory of the "arc" track on the fixed plate. When rotating to the "straight" track connected by the "arc" track, the rotating disk continues to rotate clockwise, and the limit pin is Under the force of the "supporting" track on the rotating disc, the "straight" track track on the fixed disc is extended to the periphery of the fixed disc. At this time, the limit pin and the valve sealing structure are closed to the valve seat, and the valve is closed. When the valve stem rotates counterclockwise along with the rotating disc, the limit pin and the sealing structure of the valve firstly follow the trajectory of the "straight" track on the fixed disc to the center of the fixed disc under the force of "holding" the track on the rotating disc. , then press the track of the "arc" track on the fixed plate counterclockwise to rotate the valve, the technical disadvantage of this patent is to make The track with "circular arc straight line" requires high precision, complicated machining process, and the valve core is a combined sphere, which makes it difficult to obtain a balanced pre-tightening force, thereby causing damage to the spool and shortening the life of the valve.

Chinese patent 200620105067 describes a rail-type plug valve, which comprises a valve body, a valve cover, an operating member, a valve stem, a valve seat, a valve plug which forms a conical sealing pair with the valve seat, and a rail type mechanism, and the rail type mechanism is installed. The utility model comprises a track ring having two guiding grooves at the neck of the valve plug and a double pin plate having two guiding pins pinned into the guiding groove, and further comprises a lock nut and an adjusting ring for adjusting the installation position of the track ring, the disadvantage of the patent The transmission device has a complicated structure and extremely occupies the outer space of the valve body; the transmission device involves many components and the assembly process is complicated. In addition, since the valve plug of the conical sealing pair and the lock nut and the adjusting ring for adjusting the mounting position of the rail ring need to be adjusted a plurality of times, the operation is complicated.

Summary of the invention

The object of the invention is a valve core assembly and a valve using the valve core assembly, which not only has small opening and closing torque, but also has simple structure, good manufacturing process, simple operation and good sealing performance.

In order to achieve the above object, the present invention provides a valve core assembly including a valve body and a driving member disposed in a valve body and having a common axis, the valve core assembly being engaged with the valve body to be able to wrap around The common axis rotates. The spool assembly further includes a control member and a clutch, the clutch having a connecting structure, a clutch structure and a resetting structure, the connecting structure being coupled to the valve core or the driving member, wherein the valve stem is rotated to open the valve Resetting the reset structure such that the clutch is simultaneously coupled to the spool and the drive member; the clutch is simultaneously with the spool and before the spool reaches the pre-closed position when the valve stem is rotated to close the valve The drive member is coupled to synchronize the drive member with the spool about the common axis; and the valve stem rotary valve continues to rotate the valve stem when the spool reaches the pre-closed position, at the control member Under the action of the resetting structure, the clutch structure of the clutch separates the synchronous rotation of the driving member and the valve core to convert the rotation of the valve core around the common axis into a spool pressure Radial movement of the valve seat of the valve.

Preferably, the control member is disposed on the valve body.

Preferably, the control member is a slope disposed on an inner wall of the valve body. The reset structure is an elastic member, preferably a spring. More preferably, the control member is formed on an inner wall of the valve body and above the valve body.

Preferably, the valve core is provided with a hole for receiving a connection structure of the clutch, and the driving member is provided with an opening groove matched with the clutch structure of the clutch.

Preferably, the opening groove is provided on an outer peripheral edge of the driving member.

Preferably, the spool is provided with a recess adjacent the inner wall of the recess.

In one embodiment, the clutch includes a spring and a clutch member, the clutch member is provided with a positioning post and a guide pin, the valve core is provided with a recess, the recess is provided with a clutch mounting hole, and the spring is accommodated in the The clutch mounting hole and the upper end of the spring abut against the lower end of the positioning post, and the guide pin cooperates with the control member such that the upper end of the positioning post is engaged or disengaged from the driving member.

In the above embodiment, preferably, the positioning post and the guiding pin are two cylinders having different diameters, the diameter of the positioning post is larger than the diameter of the guiding pin, and the driving member is provided with a groove. The upper end of the positioning post is received in the recess, and the valve stem rotates the valve in the valve before the valve stem is rotated to open the valve or when the valve stem is rotated to close the valve before the spool reaches the pre-closed position When the core reaches the pre-closed position, the upper end of the positioning post is disengaged from the groove.

In another embodiment, the clutch is an elastic rod, and the elastic rod is sequentially provided with a connecting section, a clutching section and a control piece engaging section; the valve core is provided with a limiting slot and a hole; and the outer peripheral edge of the driving component is provided a notch; wherein the connecting segment is inserted into the hole, and the control member engaging portion is received in the limiting slot and is engageable with the control member such that the clutch segment is accommodated in the notch Switching between the state of being out of the gap.

Preferably, the valve core is formed with a first radial convex contour, the driving member is provided with a second radial convex contour, and when the driving member rotates, the first radial convex contour and The second radially convex contour cooperates to drive the spool to press against the radial movement of the valve seat of the valve.

Preferably, the first radial protruding contour is sequentially provided with an initial portion, an intermediate portion and a terminating portion, wherein

The starting portion is a sloped surface, and when the second radial protruding contour moves along the starting portion, the spool is pressed against the radial movement of the valve seat;

The intermediate portion is a flat plane for retaining the second radial projection on the intermediate portion;

The terminating portion is a protrusion of the end of the first radial convex contour for stopping the second radial convex contour, preventing the second radial contour from rotating beyond the first radial shape Convex to the outline.

Preferably, the control member of the valve body is arranged to continue to rotate the valve stem when the valve stem rotating valve reaches the pre-closed position, and the control member of the valve body applies a downward force to the clutch structure of the clutch.

According to another aspect of the present invention, a valve is provided comprising a valve body, a positioning rod, a valve seat, and a spool assembly, the valve body including: an inlet and an outlet having the same horizontal axis, at the inlet and the outlet Forming an internal space therebetween to accommodate the valve core assembly, the valve seat being formed on the inside of the inlet; and a vertical axis direction perpendicular to the horizontal axis on the upper end wall and the lower end wall of the valve body a stem bore and a locating rod bore; the valve stem passes through the stem bore and engages the spool assembly, a position rod seal is received in the positioning rod hole, the valve core assembly is rotatable about the vertical axis, and the valve core is detachably and sealingly engaged with the valve seat, wherein the valve is The core assembly is the spool assembly described above.

Preferably, the valve core is provided with a recess, the bottom wall of the recess is provided with an elongated positioning hole, and the bottom end of the valve core is provided with a boss, and the outer periphery of the boss is provided with the valve body in the valve body. The limit blocking block cooperates with the limit blocking protrusion for preventing the spool from rotating beyond a predetermined angle.

Preferably, a central portion of the driving member is provided with a spline hole for engaging with a spline on the valve stem of the valve, so that the driving member can be rotated when the valve stem is rotated.

In a preferred embodiment, the low torque valve is a ball valve.

In the valve core assembly and the valve of the present invention, when the valve core is rotated in the closed or open state, the valve core is not in contact with the valve seat or the valve body, and is in an idle state, reducing the frictional force of their contact and reducing the torque of rotation ( The spherical spool is only radially squeezed when the valve body is closed. This allows the valve stem to have a very low torque during rotation, thus achieving the effect of low torque opening and closing of the valve. In addition, the valve is well sealed.

DRAWINGS

1 is an exploded perspective view showing a valve including a spool assembly according to an embodiment of the present invention;

Figure 2 is a cross-sectional view of the valve of Figure 1;

3a and 3b respectively show a cross-sectional view and a side view of a valve body in accordance with an embodiment of the present invention;

Figure 4 is a perspective view of the valve stem of the valve of Figure 1;

Figure 5 is a perspective view of the driving member of the valve of Figure 1;

Figure 6 is a perspective view of the valve body of the valve of Figure 1;

Figure 7 is an exploded perspective view of the clutch of the valve of Figure 1;

8 and 9 are top and perspective views, respectively, of the spool, the drive member and the clutch assembly in a coupled state;

Figure 10 is a cross-sectional perspective view of the valve when the spool, the drive member and the clutch assembly are in a combined state;

Figure 11 is a perspective view of the spool, the drive member and the clutch assembly in a disengaged state;

Figure 12 is a cross-sectional perspective view of the valve when the spool, the drive member and the clutch assembly are in a disengaged state;

Figure 13 is an exploded perspective view showing a valve including a valve core assembly according to another embodiment of the present invention;

Figure 14 is a cross-sectional view of the valve of Figure 13;

15 and 16 are perspective views showing two different viewing angles of the valve body of Fig. 13, respectively;

Figure 17 is a perspective view of the valve body of the valve of Figure 13;

18 and 19 are perspective views of two different viewing angles of the drive member of the valve of Fig. 13, respectively;

Figure 20 is a perspective view of the clutch of the valve of Figure 13;

Figure 21 is a perspective view of the valve stem of the valve of Figure 13;

Figure 22 is a cross-sectional perspective view of the valve stem, the spool, the drive member and the clutch assembly in a coupled state;

Figure 23 is a perspective view of the valve when the valve stem, the valve core, the drive member and the clutch assembly are in a combined state;

Figure 24 is a cross-sectional perspective view of the valve stem, spool, drive member and clutch assembly in a disengaged state;

Figure 25 is a perspective view of the valve when the valve stem, the spool, the drive member and the clutch assembly are in a disengaged state.

detailed description

It should be noted that the specific embodiments of the present invention are not limited to the following embodiments, and those skilled in the art should understand the present invention from the spirit of the following embodiments, and the technical terms may be based on the spirit of the present invention. For the broadest understanding, for example, the valve stem is the part used to manipulate the movement of the spool.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be noted that the same or similar components in the drawings are denoted by the same reference numerals, and for the sake of clarity, the related schematic drawings omit the related components. Herein, the up, down, left, and right directions refer to directions above, below, to the left, and to the right as viewed from the drawing, unless otherwise specified.

Figure 1 shows an exploded perspective view of a valve 100 in accordance with a first embodiment of the present invention. Figure 2 shows a cross-sectional view of the valve 100 of Figure 1 assembled. In this embodiment, the valve is a ball valve. As shown in FIG. 1, the ball valve 100 includes a valve body 1, a valve core 2, a valve seat (not shown), a valve stem 4, a driving member 5, a positioning rod 6, a clutch 7, and a sealing ring and a valve cover (not shown). . Among them, the spool 2, the driving member 5 and the clutch 7 constitute the spool assembly of the present invention.

One end of the valve body 1 is closed by a valve cover and a seal ring, and the valve seat is built in the valve body 1, and the valve body 2 is disposed in the valve body 1 through a positioning rod 6 provided at a lower portion thereof. The other end of the valve body 1 is connected with a flange (or a connector of a liquid container inner bag, not shown) to seal the valve body in the valve body 1, and a sealing ring is disposed between the flange and the valve body 1. The valve stem 4 is coupled to the drive member 5, and the drive member 5 is coupled to the spool 2 such that when the valve stem 4 is rotated, the spool 2 acts accordingly, as will be described in further detail below.

Figures 3a and 3b show a cross-sectional view and a side view, respectively, of the valve body. As shown in Figures 3a and 3b, the valve body 1 is There is an upper end and a lower end and a housing on the left and right sides, and an inner space 11 is formed in the housing to accommodate the spool 2, the valve seat, the driving member 5, and a portion of the valve stem 4. The left and right sides of the casing respectively form an inlet 1a and an outlet 1b communicating with the container and the outside along a horizontal axis (not shown), and a valve seat is provided on the inner side of the inlet 1a along the horizontal axis. The upper and lower ends of the valve body 1 are respectively formed with a valve stem hole 1c and a positioning rod hole 1d along the vertical axis (not shown) perpendicular to the horizontal axis. A finite block is arranged radially on the bottom of the valve body 1 and on both sides of the positioning rod hole 1d, and the limit blocking block is respectively engaged with the limit blocking protrusion of the valve core, so that the valve core 2 can only be in the valve body 1 Rotate within the 90 degree range.

A control member 11 is provided on the top wall of the internal space, and the control member is disposed around the valve stem hole 1c. The control member may be a bevel or a curved surface as long as it can cooperate with the clutch of the present invention to achieve the "off" and "close" states of the clutch.

As shown in Fig. 2, the valve stem 4 is rotatably received in the stem hole 1c. The positioning rod 6 is received in the positioning rod hole 1d of the valve body 1, and the positioning rod 6 is sealed and fixed to the wall of the positioning rod hole through the O-ring. It should be noted that although the positioning rod is a separate member in this embodiment, those skilled in the art should understand that the positioning rod can also be integrally formed on the bottom of the valve body, or other structures, as long as it can be supported. The spool simultaneously provides the spool with a degree of freedom of rotation about the vertical axis.

4 is a perspective view showing a valve stem assembly and a valve stem 4 of a valve in accordance with an embodiment of the present invention. As shown in FIG. 4, the upper end of the valve stem 4 is provided with a handle 41, which can drive the valve stem 4 to rotate about a vertical axis. A central portion of the valve stem 4 is formed with a sealing groove 42 into which an O-ring can be inserted to prevent liquid from leaking from the valve stem. The lower end of the valve stem 4 is formed with a spline 44, and the spline 44 can cooperate with the spline hole 51 (see FIG. 5) in the driving member 5, so that when the valve stem 4 is rotated, the rotation of the valve stem 4 can drive the driving member 5 to follow Turning.

It should be noted that the function of the spline 44 and the spline hole 51 is to transmit the rotation of the valve stem 4 to the driving member 5, thereby causing the driving member 5 to rotate therewith. It will be understood by those skilled in the art that other structures may be used to achieve the above. Transmission function. For example, the lower end of the valve stem 4 is a transmission portion having a triangular cross section, a square shape, and the like, and the driving member 5 is correspondingly provided with a transmission hole such as a triangular hole or a square hole. A guide rod 45 is also extended at the lower end of the spline 44 for engagement with the elongated locating hole in the spool 2 to guide the direction of movement of the spool, as will be described in more detail below.

FIG. 5 shows a perspective structural view of the driving member 5. As shown in Fig. 5, the driving member 5 is a plate member having a spline hole 51 at its center, and the outer contour of the driving member 5 is formed with a radially convex contour (second radial convex contour) 52. The radially convex contour 52 cooperates with the radially inner convex contour on the spool 2 to effect radial movement of the spool against the valve seat, as will be further described below. A groove 531 is provided on the surface 53 of the driving member opposite to the clutch member 71. The groove is engaged or separated from the clutch member 71 by a control member provided on the inner wall of the valve body, which will be further described below.

Fig. 6 shows a specific structure of a spool 2 according to an embodiment of the present invention. As shown in FIG. 6, in the present embodiment, the valve body 2 is a substantially hollow spherical shell having a spherical body 21 and having an axis (vertical axis, not shown) around which the spool can rotate. The vertical axis direction is provided with a recess 22 on the top end wall of the spherical shell, and the side wall of the recess 22 is provided with a radially inner convex contour (first radial convex contour) 23 and a clutch mounting hole 25, and a radially inner convex contour 23 A certain distance from the clutch mounting hole 25 depends on the angle at which the spool is rotated from the open state to the pre-closed state. Here, the pre-closed state refers to a state in which the spool is rotated to close the valve but the spool is not yet pressed against the valve seat. At this time, since the spool has not yet pressed the valve seat, it is still not completely closed, and there may be a leak, so It is called pre-shutdown. An elongated positioning hole 26 is provided in the bottom wall of the recess.

The radially inner convex profile 23 includes a starting portion 23b, an intermediate portion 23c, and a terminating portion 23d. The starting portion 23d is a sloped surface, and when the radially outward convex contour of the spool moves along the starting portion (when the spool and the driving member are pressed against each other), the spool performs radial movement of the pressing valve seat. The intermediate portion is a flat plane that acts such that the radially convex contour can rest stably and statically on the intermediate portion. The terminating portion is a projection at the end of the radially inner convex contour 23 for retaining the radially outer convex contour 23 to prevent the radially outer convex contour 23 from exceeding the radially inner convex contour when rotated. When the radially convex contour of the spool is located at the intermediate portion 23c, the radially convex contour of the spool will come into contact with the terminating portion 23d, and the driving member 5 and the spool 2 are placed because of the limit of the stepped surface of the terminating portion. In a relatively static state, the spool is pressed against the seat and the valve is closed.

The elongated positioning hole 26 is an elongated hole having two parallel sides and having curved ends at both ends, which cooperate with the guide rod 45 on the valve stem 4.

The bottom end of the spherical body is provided with a boss (not shown), and the outer periphery of the boss is provided with a limiting blocking protrusion that cooperates with the limiting block of the valve body 1. The angle between the limit blocking projections is 90 degrees. During the valve closing process, when the spool is turned to the pre-closed position, the limit blocking projection cooperates with the limit blocking block to prevent the spool from rotating more than 90 degrees (or preventing the spool from rotating beyond a predetermined angle). During the valve opening process, when the spool is turned to the fully open position, the other limit blocking projection cooperates with the other limit blocking block to prevent the spool from rotating more than 90 degrees.

Figure 7 is an exploded perspective view of the clutch 7 of the valve of Figure 1 . The clutch 7 includes a clutch member 71 and a spring 72 as a reset member. The clutch member 71 is provided with a positioning post 711 and a guide pin 712. The positioning post 711 and the guide pin 712 are two cylinders having different diameters. The diameter of the positioning post 711 is larger than the diameter of the guiding pin 712. The spring 72 is received in the clutch mounting hole of the spool and the upper end of the spring 72 abuts against the lower end of the positioning post 711. The guide pin 712 is engaged with the control member 11 on the valve body such that the upper end of the positioning post 711 is fitted or separated from the driving member 5.

Specifically, the driving member is provided with a groove 531, when the valve stem is rotated to open the valve or at the valve stem When the valve is closed to close the pre-closed position, the upper end of the positioning post 531 is received in the recess 531, and the stem rotates the valve when the spool reaches the pre-closed position, the upper end of the positioning post is disengaged The groove 531.

After the assembly is completed, as shown in FIG. 2, the driving member 5 is placed in the recess 22 at the top end of the spool 2. The valve stem 4 passes through the stem hole 1c in the upper portion of the valve body 1, passes through the spline hole 51 of the driving member 5, and is inserted into the elongated positioning hole 26 of the spool 2. The valve stem 4 and the wall of the valve body 1 are sealed by an O-ring. The cooperation of the elongated positioning hole 26 and the stem guiding rod 45 mainly acts as a forced guiding for the radial movement of the spool (i.e., the radial movement along the elongated positioning hole).

When the valve is switched from the open state to the pre-closed state, the valve stem rotates, and when the valve is in the open state, the valve core does not contact the valve seat, and the resistance received during the rotation is the frictional force of the rotating pair in each connecting member, so the rotation The resistance is very small and almost negligible. At this time, the clutch in the recess of the valve core is combined with the driving member, so that the driving member synchronously drives the spool to rotate (as shown in FIG. 10), and after the spool is rotated through approximately 90 degrees, the closed end of the spool contacts or aligns the valve. The seat and the limit blocking structure of the valve core and the valve body at the bottom end enable the spool to rotate only within a 90 degree range of rotation of the valve body. After the spool is rotated through approximately 90 degrees, the rotational torque is increased on the valve stem, and the drive member and the clutch in the recess of the spool are separated (as shown in FIGS. 11 and 12), so that the radially outward convex contour of the drive member is along the spool diameter. Rotating the inner convex contour, so that the upper and lower ends of the valve core are synchronously moved radially (to obtain a radial moving component), at which time the driving member in the recess of the valve core cooperates with the elongated positioning hole in the concave portion of the valve core to the spool The radial movement acts as a forced guiding action. When the radially outward convex contour rotates from the beginning of the convex contour, the spool is applied with a predetermined pressure to the valve seat, and the two are pressed against each other according to a predetermined pressure. The passage is closed to close the valve.

When the valve needs to be opened, the valve stem is rotated in the reverse direction, and the rotation of the valve stem drives the driving member to rotate in the reverse direction. Due to the large frictional force of the pressure contact between the valve core and the valve seat, the valve core does not rotate with the driving member, and is driven. The radially convex contour of the piece is transferred from the end of the radially inner convex contour to the starting portion to reset the driving member and the recess to the initial position, at which time the pressure applied to the spool is thus lost, and the upper and lower ends of the valve core Synchronization and valve seat separation, the friction between them disappears, the spool is axially reset, and the clutch is re-engaged with the drive member to achieve the pre-open state. At this time, since the clutch is recombined with the driving member, the driving member drives the spool to rotate 90 degrees in the reverse direction to the state in which the valve passage is turned on.

In the valve core assembly and the valve of the invention, since the valve core is not in contact with the valve seat or the valve body during the pre-closing or opening process, the valve core is in an idle state, reducing the frictional force of their contact and reducing the torque of rotation (only When the valve body is closed, the spherical valve core is squeezed radially, which makes the torque of the valve stem very small during the rotation, so as to achieve the effect of low torque opening and closing of the valve. In addition, the valve is well sealed.

Figures 13-25 illustrate a valve 100' in accordance with yet another embodiment of the present invention. As shown in Figures 13-25, the valve of this embodiment differs from the valve of the embodiment of Figures 1-12 in the structure of the clutch 7' and the drive member 5' and the spool 2' and the clutch 7'. Corresponding structures, the rest of which are not detailed here.

Specifically, in this embodiment, as shown in FIG. 20, the clutch 7' is an elastic rod, and the elastic rod is sequentially provided with a connecting portion 71', a clutch portion 72' and a control member engaging portion 73', wherein the connecting portion constitutes a clutch connection. The structure, and the clutch section and the control section cooperate to form a clutch structure of the clutch. Specifically, in the embodiment shown in the drawings, the clutch is bent from a single elastic rod, and the connecting portion 71', the clutch portion 72', and the control member engaging portion 73' are substantially parallel to each other.

Fig. 17 shows a perspective view of the spool 2'. The spool 2' differs from the spool 2 shown in Fig. 6 in the structure in which the spool is connected to the clutch, and the rest are the same and will not be described in detail herein. As shown in Fig. 17, a stopper groove 27 is provided on the outer periphery of the top of the spool 2' for accommodating the control fitting portion 73' of the clutch 7'. A hole 25' is provided in the recess 22 of the spool 2' for receiving the connecting portion 71' of the clutch 7'. Preferably, the periphery of the mouth of the hole 25' is provided with a boss 251' so that after assembly, there is a space between the clutch 7' and the recess 22 which allows the clutch 7' to be deformed into the space.

As shown in Figs. 18 and 19, the outer peripheral edge of the driving member 5' is provided with a notch 54'. In operation, the control member engagement section is received in the limit groove 27 and is engageable with the control member 11 such that the clutch segment 72' is switched between a state of being received in the notch 54' and a state of being disengaged from the notch 54'.

In this embodiment, when the valve stem is rotated to open the valve or when the valve stem is rotated to close the valve, before the spool reaches the pre-closed position, the clutch 7' is simultaneously connected with the valve core and the driving member, that is, the clutch portion 72' accommodates. In the notch 54, the drive member is synchronized with the spool to rotate about the common axis. When the valve stem rotating valve reaches the pre-closed position, the valve stem continues to be rotated, and the clutch structure of the clutch rotates the synchronous rotation of the driving member and the spool under the action of the valve body control member. That is, the clutch segment 72' is disengaged from the indentation 54 to translate the rotation of the spool about the common axis into a radial movement of the spool against the valve seat of the valve.

It should be noted that the valve of the foregoing embodiment of the present invention is exemplified by a ball valve, but the structure of the present invention can also be applied to other valves such as a butterfly valve. Other components of the present invention may also adopt other configurations without departing from the spirit of the present invention. For example, the handle and the valve stem may be separate separate components or integral components, and the coupling of the valve stem to the drive member may be splined, or may be threaded, anchored, welded, etc. known to those skilled in the art. Other ways of joining.

In the above embodiment, the valve core is provided with a recess in which the inner convex contour is provided, and the driving member is at least partially disposed in the recess, and the driving member is provided with a convex contour. However, those skilled in the art will understand that the valve core may not be provided with a recess, but a boss is provided, and the boss is provided with a convex contour, and correspondingly, the driving member is provided There is a recessed portion in which a convex contour is provided, and the effect of the present invention can also be achieved.

It should also be noted that although in the above embodiment, the control member for controlling the action of the clutch is disposed on the inner wall of the valve body, those skilled in the art will appreciate that the control member may be disposed at other positions such as the valve stem. Moreover, the form of the control member can also adopt other forms than the inclined surface as long as it can drive the clutch action to realize the clutch function.

Those skilled in the art will appreciate that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics. The above embodiments are to be considered in all respects as illustrative and not restrictive. Therefore, the scope of the invention is defined by the appended claims rather All changes that come within the meaning and range of the claims are intended to be included within the scope of the appended claims.

Claims

A spool assembly includes a spool and a drive member disposed in a valve body and having a common axis, the spool assembly being rotatably coupled to the valve body about the common axis, wherein:

The spool assembly further includes a control member and a clutch, the clutch having a connection structure, a clutch structure, and a reset structure, the connection structure being coupled to the valve core or the drive member, wherein

When the valve stem is rotated to open the valve, the resetting structure is reset, so that the clutch is simultaneously connected with the valve core and the driving member; before the valve stem is rotated to close the valve, before the spool reaches the pre-closed position, The clutch is simultaneously coupled to the spool and the drive member to synchronize the drive member with the spool about the common axis; and the stem pivot valve is when the spool reaches the pre-closed position Continuing to rotate the valve stem, the reset structure acts under the action of the control member, and the clutch structure of the clutch separates the synchronous rotation of the driving member and the spool to cause the spool to surround the The rotation of the common axis translates into a radial movement of the valve seat against the valve seat of the valve.
The valve core assembly according to claim 1, wherein said control member is a slope provided on an inner wall of the valve body, and said reset structure is an elastic member.
The valve cartridge assembly according to claim 1, wherein said valve core is provided with a hole for receiving a connection structure of the clutch, and said driving member is provided with an opening groove matched with a clutch structure of said clutch. .
A spool assembly according to claim 1, wherein said clutch comprises a spring and a clutch member, said clutch member is provided with a positioning post and a guide pin, said valve core being provided with a recess, said recess being provided with a clutch a mounting hole, the spring being received in the clutch mounting hole and an upper end of the spring abutting a lower end of the positioning post, the guide pin mating with the control member such that an upper end of the positioning post and the drive Match or separate pieces.
The valve cartridge assembly according to claim 4, wherein said positioning post and said guide pin are two cylinders having different diameters, said positioning post having a diameter larger than a diameter of said guide pin, said driving a groove is provided on the piece, and the upper end of the positioning post is received in the groove when the valve stem is rotated to open the valve or when the valve stem is rotated to close the valve before the valve core reaches the pre-closed position. The valve stem rotates the valve when the spool reaches the pre-closed position, and the upper end of the positioning post is disengaged from the recess.
The valve cartridge assembly according to claim 1, wherein the clutch is an elastic rod, and the elastic rod is sequentially provided with a connecting portion, a clutch portion and a control member engaging portion; the valve core is provided with a limiting slot and a hole a peripheral edge of the driving member is provided with a notch; wherein the connecting portion is inserted into the hole, and the control member engaging portion is received in the limiting groove and can be engaged with the control member, so that the clutch The segment is accommodated in the gap The transition between the state and the state of being out of the gap.
The spool assembly of claim 1 wherein said spool is formed with a first radial projection profile and said drive member is provided with a second radial projection profile, said drive member rotating The first radial convex contour and the second radial convex contour cooperate to drive the spool to press against the radial movement of the valve seat of the valve.
A valve cartridge assembly according to claim 7, wherein said first radial projection is sequentially provided with an initial portion, an intermediate portion and a terminating portion, wherein

The starting portion is a sloped surface, and when the second radial protruding contour moves along the starting portion, the spool is pressed against the radial movement of the valve seat;

The intermediate portion is a flat plane for retaining the second radial projection on the intermediate portion;

The terminating portion is a protrusion of the end of the first radial convex contour for stopping the second radial convex contour, preventing the second radial contour from rotating beyond the first radial shape Convex to the outline.
The valve cartridge assembly according to claim 1, wherein the control member of the valve body is arranged to continue to rotate the valve stem when the valve stem rotating valve reaches the pre-closed position, and the valve body control member Apply a downward force to the clutch's clutch structure.
A valve includes a valve body, a positioning rod, a valve seat, and a spool assembly, the valve body including: an inlet and an outlet having the same horizontal axis, an internal space formed between the inlet and the outlet to accommodate the a valve plug assembly having a valve seat formed on an inner side of the inlet; a valve stem hole and a positioning rod hole formed on an upper end wall and a lower end wall of the valve body along a vertical axis direction perpendicular to the horizontal axis; a valve stem is passed through the valve stem bore and engaged with the spool assembly, the retaining rod seal is received in the positioning rod bore, the spool assembly is rotatable about the vertical axis, The spool is detachably sealingly fitted to the valve seat, characterized in that the spool assembly is a spool assembly according to any one of claims 1 to 9.