WO2019062378A1

WO2019062378A1 - Valve

Info

Publication number: WO2019062378A1
Application number: PCT/CN2018/101284
Authority: WO
Original assignee: 上海鸿研物流技术有限公司
Priority date: 2017-09-30
Filing date: 2018-08-20
Publication date: 2019-04-04
Also published as: CN107575629A; CN107575629B

Abstract

A valve, comprising a valve body (10), a valve stem (30), and a valve core assembly. The valve core assembly is mounted in the valve body (10) and comprises a valve core (21); the valve core (21) is hinged to the valve body (10); the valve core assembly further comprises a driving member (22), a positioning member (24), and an elastic member (23); the positioning member (24) is mounted on the valve core (21) in a relatively movable manner; the elastic member (23) is mounted between the positioning member (24) and the valve core (21); a matching relation between the driving member (22) and the valve core (21) is switchable under the effect of the valve body (10): when the valve is in an open state, the driving member (22) matches the valve core (21) to form a relatively-integral piece that moves integrally so as to drive the valve core (21) to close the valve, and when the valve reaches a closed position, the driving member (22) matches the valve core (21) under the effect of the valve body (10) to form a relatively-movable single piece. The valve has a function of preventing pseudo closing, such that the valve can be prevented from pseudo closing when used, i.e., preventing the occurrence of a situation where a user thinks that the valve is closed, but actually it is not yet.

Description

valve

Related application cross-reference

This patent application claims priority to the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the disclosure of

Technical field

This invention relates to valves, and more particularly to valves for use in logistics transportation equipment.

Background technique

Existing valves for medium-sized bulk storage containers basically have more or less residual gaps between the valve sealing surface and the outer channel, especially for food-grade applications. Once there is a gap that cannot be cleaned, it will result in The residual cleaning liquid and other harmful substances in the use of bacteria cause bacteria pollution, which may lead to accidents.

China Patent Application No. ZL201110260851.6 discloses a low-torque ball valve. When the valve is closed and the valve is cleaned from the front, the cleaning liquid will remain between the valve spool and the valve seat positioning device. It causes the cleaning liquid and other harmful substances remaining in the use to breed bacteria, resulting in food contamination.

In addition, some existing valves sometimes have a false closure, that is, the user believes that the valve has been closed, but the valve does not actually close the lock, especially when the valve is applied to a viscous liquid.

Summary of the invention

It is an object of the invention to provide a valve that can be reliably closed. Further, it can also reduce or even eliminate the residual liquid in the valve.

To achieve the above object, the present invention provides a valve including a valve body, a valve stem, a valve seat and a spool assembly, the spool assembly being mounted in the valve body and including a spool, the spool being hinged to the valve body The valve body, wherein the valve core assembly further comprises a driving member, a positioning member and an elastic member, wherein the positioning member is movably mounted on the valve core, and the elastic member is mounted on the positioning member Between the valve cores, wherein the cooperation relationship between the driving member and the valve core is switchable under the action of the valve body: when the valve is in an open state, the driving member is matched with the valve core to form An integral unit of the integral movement, driving the valve core to close the valve, and when the valve reaches the closed position, the driving member cooperates with the valve core to form a relatively movable monomer under the action of the valve body Pieces.

In one embodiment, the valve core and the driving member are arranged to be relatively non-rotatable by the driving member and the valve body under the action of the valve body when the valve reaches the closed position. The relative positional relationship is translated to a second relative positional relationship in which the drive member is rotatable relative to the spool.

In an embodiment, the inner wall of the valve body is provided with a driving portion, and the valve core and the driving member are disposed to be relatively movable under the action of the driving portion, so that the driving member and the valve core Switching from a relatively non-rotatable first relative positional relationship to a second relative positional relationship in which the drive member is rotatable relative to the spool.

In an embodiment, in the valve open state, the driving member is fixedly connected to the valve core, and the inner wall of the valve body is provided with a protrusion, and the protrusion is arranged to drive the valve during the closing process of the valve The drive member moves and disengages the drive member from the spool when the valve reaches the closed position.

In one embodiment, one end of the valve core is provided with a connecting portion, and the connecting portion is provided with a groove and a valve stem fitting hole on both sides of the groove, and the bottom of the groove is provided with an opening, and The driving member has a main body, the main body extends out of the elastic portion, and the end of the elastic portion is provided with a limiting portion and a passive portion, wherein the driving member is received in the groove, and the limiting portion and the opening portion are A hole fit allows the drive member to be detachably coupled to the spool, and the passive portion is engageable with the valve body to urge the drive member to move relative to the spool.

In one embodiment, one side wall of the opening of the valve core is provided with a driving notch, a passive portion of the driving member includes a driving edge, and the valve body is provided with a driving protrusion, wherein the driving A projection can drive the drive edge through the drive notch to drive the drive member relative to the spool.

In one embodiment, the driving member is provided with a driving cam, and the driving cam is disposed on a side of the main body opposite to a side where the elastic portion is provided, wherein the driving cam is used to drive the The positioning member moves.

In one embodiment, the valve core has a connecting portion at one end and a passive portion at the other end, wherein the connecting portion is provided with a groove and two mounting holes respectively located at two sides of the groove, each of which is The assembly hole is provided with a waist hole and a transverse hole which communicate with each other, and during the closing of the valve, the passive portion drives the spool movement under the action of the valve body, so that the driving member is The transverse bore moves to the waist aperture and enables the drive member to rotate relative to the spool.

In one embodiment, the valve body is provided with a driving rib at a position corresponding to the passive portion of the spool, wherein the driving rib is disposed to be in a passive portion of the spool during the closing of the valve Cooperate to drive the spool movement.

In one embodiment, the valve further includes an inner valve seat, the inner valve seat being mounted in the valve body, the inner valve seat having an annular body and a sealing structure, wherein the sealing structure is configured to be when the valve is In the closed state, the sealing structure seals and/or fills a gap formed between the valve body, the inner valve seat, and the spool.

In one embodiment, the sealing structure extends inwardly from an inner circumferential surface of the annular body.

In one embodiment, the sealing structure extends inwardly along the entire inner circumferential surface of the annular body and is sequentially provided with an elastic portion and a first sealing portion, wherein the first sealing portion is disposed when the valve is in a closed state The side of the spool facing the inner valve seat is pressed against.

In one embodiment, the first sealing portion protrudes from the end of the elastic portion toward the valve body.

In one embodiment, the inner valve seat is further provided with a main sealing portion, wherein the main sealing portion is disposed on the annular body and is arranged to press against the surface of the valve core when the valve is in a closed state The side of the inner valve seat is described, and the position at which the main seal portion presses the spool is radially outward compared to the position at which the first seal portion presses the spool.

In one embodiment, a second sealing portion and a third sealing portion are disposed on a side of the valve core facing the inner valve seat, wherein the second sealing portion is radially outward with respect to the third sealing portion, and The second seal portion is engaged with the main seal portion when the valve is in a closed state, and the third seal portion is engaged with the first seal portion.

In one embodiment, the spool is hinged to the valve body and the valve further includes a handle and a valve stem, wherein the handle is provided with a driving gear, the valve stem is provided with a driven gear, and the driving gear Cooperating with the driven gear such that rotation of the handle drives rotation of the valve stem and thereby drives the spool to rotate.

In one embodiment, the spool is hinged to the valve body and the valve further includes a handle and a valve stem, wherein the handle and the valve stem have axes of rotation of different axes, the handle and the valve The lever has a transmission relationship of synchronous rotation, and the rotation of the handle is transmitted to the valve stem to perform a synchronous rotation angle amplifying motion, and thereby the spool is driven to rotate.

In one embodiment, the valve further includes an inner valve seat, the valve core and the inner valve seat are mounted in the valve body, the valve body is formed with a flow passage, and the valve core is disposed to be capable of being opposite to the valve body a valve body squeezing movement of the inner valve seat and having a component of movement along an axis of the flow passage, wherein the inner valve seat is configured to cause the inner valve seat when the valve is in a closed state The gap formed between the inner valve seat, the valve body and the valve body is sealed and/or filled.

In the above embodiments, the driving member, the valve core and the positioning member are arranged such that the valve has the following three transmission relationships during the closing process: a first transmission relationship, wherein the driving member and the driving device The positioning member is relatively stationary, the driving member drives the spool to rotate to close the spool, and when the first transmission relationship ends, the driving member, the spool and the positioning member are in a first transmission relationship Switching to a second transmission relationship, wherein the driving member drives the positioning member to cause relative movement of the positioning member relative to the spool; when the second transmission relationship ends, the driving member, the spool And the positioning member is switched from the second transmission relationship to the third transmission relationship, wherein the driving member controls the positioning member in an extended state, so that the positioning member is always in a state of being engaged with the valve body, The driving member presses the spool to perform a pressing movement toward the valve diameter direction, thereby sealingly locking the valve core.

The invention also provides a valve comprising a valve body, a valve stem, a valve seat and a valve core assembly, the valve core assembly being mounted in the valve body and comprising a valve core, the valve core being hinged to the valve body, Wherein, the valve core assembly further includes a driving member, a positioning member and an elastic member, wherein the positioning member is movably mounted on the valve core, and the elastic member is mounted on the positioning member and the valve core And the drive member, the valve core and the positioning member are arranged such that the valve has the following three transmission relationships during the closing process: a first transmission relationship, wherein the drive member and the positioning Relatively stationary, the driving member drives the spool to rotate to close the spool; when the first transmission relationship ends, the driving member, the spool and the positioning member are switched from the first transmission relationship to a second transmission relationship, wherein the driving member drives the positioning member to cause relative movement of the positioning member relative to the spool; when the second transmission relationship ends, the driving member, the spool, and the The positioning member is driven by the second transmission Switching to a third transmission relationship, wherein the driving member controls the positioning member in an extended state such that the positioning member is always in a state of being engaged with the valve body, and the driving member presses the spool to a valve is squeezing in a direction to seal the valve core; and the valve further includes a tamper-proof closing device, wherein the tamper-proof closing device comprises an inner wall disposed on the inner wall of the valve body a driving portion and a clutch structure disposed on the spool assembly, the driving portion being arranged to drive the clutch structure such that in the first transmission relationship, the driving member and the spool are relatively incompatible The first relative positional relationship of the rotation is translated to a second relative positional relationship in which the drive member is rotatable relative to the spool.

In one embodiment, in the valve open state, the driving member is fixedly coupled to the valve core, and the driving portion is a protrusion disposed on an inner wall of the valve body, and the protrusion is disposed at the The drive member is driven to move during closing of the valve and to disengage the drive member from the spool when the valve reaches the closed position.

In one embodiment, the valve core has a connecting portion at one end and a passive portion at the other end, wherein the connecting portion is provided with a groove and two valve stem mounting holes respectively located at two sides of the groove, each The fitting holes are provided with waist-shaped holes and transverse holes communicating with each other, and during the closing of the valve, the passive portion drives the movement of the spool under the action of the valve body, thereby causing the valve A rod moves from the transverse bore to the waist hole and enables the drive member to rotate relative to the spool.

The valve of the present application can prevent the valve from being falsely closed due to the provision of a false-proof closing device, especially when the valve is applied to a viscous liquid. In addition, the valve is further provided with a sealing structure for preventing liquid from entering the gap between the valve body, the valve body and the inner valve seat, thereby greatly reducing the residual liquid in the valve and reducing pollution.

DRAWINGS

1 is a cross-sectional view of a valve in which the valve is closed but not yet sealed in a locked state, in accordance with an embodiment of the present invention;

2 is an exploded view of a valve in accordance with an embodiment of the present invention;

3 is an exploded view of a spool assembly in accordance with an embodiment of the present invention;

Figure 4 is an assembled view of the spool assembly of Figure 3;

Figure 5 is a perspective view of a driving member in accordance with an embodiment of the present invention;

Figure 6 is another perspective view of the driving member of Figure 5;

Figure 7 is a perspective view of a valve spool in accordance with an embodiment of the present invention;

Figure 8 is another perspective view of the spool of Figure 7;

Figure 9 is a perspective view of a valve body in accordance with an embodiment of the present invention;

Figure 10 is a perspective view of a positioning member in accordance with an embodiment of the present invention;

Figure 11 is a cross-sectional view of a positioning member in accordance with an embodiment of the present invention;

Figure 12 is a front elevational view of a positioning member in accordance with an embodiment of the present invention;

Figure 13 is a perspective view of an inner valve seat in accordance with an embodiment of the present invention;

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

Figure 15 is an enlarged view of a portion A of Figure 14;

Figure 16 is a cross-sectional view of the valve of Figure 1 with the valve in an open state;

Figure 17 is a cross-sectional view of the valve of Figure 1 with the valve approaching the closed position but not yet closed;

Figure 18 is a cross-sectional view showing the drive member, the spool and the positioning member of the valve in a first transmission relationship, wherein the spool is in a closed position;

Figure 19 is a perspective view showing the driving member, the valve core and the positioning member of the valve in a first transmission relationship, wherein the valve core is in a closed position;

20A and 20B are respectively a cross-sectional view and a perspective view showing the driving member, the spool and the positioning member of the valve in a second transmission relationship, wherein the spool is in a locked position;

21A and 21B are respectively a cross-sectional view and a perspective view showing the driving member, the valve core and the positioning member of the valve in a first transmission relationship, wherein the valve body is in a locked and sealed position;

Figure 22 shows an exploded perspective view of a valve in accordance with another embodiment of the present invention;

Figure 23 is an exploded view of the spool assembly of the valve of Figure 22;

Figure 24 is a perspective view of the spool of 23;

Figure 25 is a perspective view of the valve body of Figure 22;

Figure 26 is a cross-sectional view of the valve of Figure 22 taken along the axis of the locator with the valve in an open state;

Figure 27 is a cross-sectional view of the valve of Figure 22 taken at a position perpendicular to the axis of the mounting hole at the position of the fitting hole, wherein the valve is in an open state;

Figure 28 is a cross-sectional view of the valve of Figure 22 taken along the axis of the locator, wherein the valve is near the closed position but has not been closed;

Figure 29 is a cross-sectional view of the valve of Figure 22 taken at a position perpendicular to the axis of the mounting hole at the position of the fitting hole, wherein the valve is close to the closed position, but has not been closed;

Figure 30 shows a perspective view of the valve when it is in a near closed position but not yet closed, showing the fit of the spool and the valve body at this time;

Figure 31 is a cross-sectional view of the valve of Figure 22 taken along the axis of the locator with the valve in the closed position but not yet locked;

Figure 32 is a cross-sectional view of the valve of Figure 22 taken at a position perpendicular to the axis of the mounting hole at the position of the mounting hole, wherein the valve is in the closed position but not yet locked;

Figure 33 is a cross-sectional view of the valve of Figure 22 taken along the axis of the locator, wherein the valve is in a locked but unsealed state;

Figure 34 is a cross-sectional view of the valve of Figure 22 taken at a position perpendicular to the axis of the mounting hole at the position of the fitting hole, wherein the valve is locked but not yet sealed;

Figure 35 is a cross-sectional view of the valve of Figure 22 taken along the axis of the locator with the valve in a locked, sealed condition.

Detailed ways

The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiment shown in the drawings is not intended to limit the scope of the invention, but only to illustrate the spirit of the invention.

In the following description, numerous specific details are set forth One skilled in the relevant art will recognize, however, that the embodiments can be practiced without one or more of these specific details. In other instances, well-known devices, structures, and techniques are not shown or described in detail to avoid obscuring the description of the embodiments.

Unless the context requires otherwise, the words "including" and variations thereof, such as "including" and "having", are meant to be construed as an inclusive, inclusive meaning. not limited to".

References to "one embodiment" or "an embodiment" in the specification are intended to mean that the particular features, structures, or features described in connection with the embodiments are included in at least one embodiment. Thus, appearances of the "a" or "an" In addition, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

The singular forms "a", "the" and "the" It should be noted that the term "or" is generally used in its meaning including "and/or" unless the context clearly dictates otherwise.

As shown in FIGS. 1-2, the valve 100 includes a valve body 10, a spool assembly 20, a valve stem 30, a handle 40, an outer valve seat 50, an inner valve seat 60, a flange 70, and a cover 80. The spool assembly 20 includes a spool 21, a driving member 22, an elastic member 23, and a positioning member 24. The spool assembly 20 is mounted in the valve body 10, and the spool 21 is hinged to the valve body 10. The valve stem 30 is rotatably mounted to the valve body 10 by a snap 90. A seal ring 901 is disposed between the valve stem 30 and the valve body 10. The valve core assembly 20 and the valve body 10 are provided with interlocking anti-false closing devices, thereby preventing the valve from being falsely closed when the valve is used for a relatively viscous liquid, that is, preventing the operator from thinking that the valve has been closed and locked and sealed. However, in fact, the valve has not been closed, which will be described in further detail below. Here, the closed position refers to a position range in which the valve has been closed but has not been sealed, as shown in FIG.

The outer valve seat 50 is disposed between the valve body 10 and the cover 80. The inner valve seat 60 is disposed between the valve core 21 and the valve body 10. In the closed state, the inner valve seat cooperates with the valve core such that the formation space between the valve core, the valve body and the inner valve seat is at least partially filled and/or Completely sealed. Thereby, the space left between the valve body of the valve, the valve body and the inner valve seat is reduced or even eliminated, as will be described in further detail below.

A cover 80 is provided at the outlet end of the valve body 10. The flange 70 is disposed at the inlet end of the valve body 10. A flow passage is formed between the inlet end and the outlet end of the valve body. The flow channel has an axis extending from the inlet end to the outlet end. The handle 40 is provided with a driving gear 41. The valve stem 30 is provided with a driven gear 31. The driving gear 41 is coupled with the driven gear 31, so that the rotation of the valve stem 30 can be driven by the turning work of the handle 40.

A spool assembly of an embodiment of the present application is described below with reference to Figures 3-12.

As shown in FIGS. 3-6, the driving member 22 has a main body 220. The main body 220 is provided with a hanging table 221, a locking cam 222, a control cam 223, and a first valve stem mounting hole 224. The control cam 223 is located at the middle of the driving member 22 and is configured to cooperate with the cam engaging surface 241 provided on the positioning member 24, so as to drive the positioning member to slide by the rotation of the driving member. The hanging platform 221 is disposed on both sides of the control cam 223 and is used to cooperate with the hanging mating surface 213 of the spool 21 to realize valve opening. The locking cam 222 is located behind the hanging table 221 and is adapted to cooperate with the locking boss 214 of the spool 21 to achieve a third transmission relationship. The first valve stem mounting hole 224 is formed through the driving member 22, and the valve stem 30 can extend into the first valve stem mounting hole 224, so that the driving member 22 can be rotated by the rotation of the valve stem 30, wherein the driving member 22 is The mating relationship of each portion with the spool 21 and the positioning member 24 will be described in detail below. The driving member 22 is also provided with a resilient portion 225. The elastic portion 225 is located on the other side of the main body 220 opposite to the side on which the control cam 223 is provided. A passive portion 226 is provided at the end of the elastic portion 225. Here, the passive portion 226 is a driving edge. The end of the elastic portion 225 is further provided with a limiting portion 227. The limiting portion 227 extends from the lower surface of the passive portion 226 and protrudes from the outer surface of the elastic portion. The limiting portion 227 cooperates with the opening 219 of the valve core, that is, the limiting portion 227 can be snapped into the opening 219 for fixedly connecting the driving member to the valve core. The elastic portion 225, the passive portion 226, and the limiting portion 227 on the driving member 22 together with the corresponding structures on the valve core 21 form a clutch structure, so that during the closing of the valve, the driving member 22 can be disconnected from the valve core and can be Relative rotation will be further described below.

As shown in FIGS. 7-8, the spool 21 is provided with a guide portion 210. Preferably, the guide portion 210 is a hole that extends transversely through the valve body 21. The positioning member 24 extends into the guide portion 210 and is slidable within the guide portion 210. One end of the valve body 21 is provided with a connecting portion 211 which is integrally formed outwardly from the edge of the valve body 21 at one end of the guiding portion 210. A first recess 212 is provided in the middle of the connecting portion 211. A locking boss 214 and an opening 219 are provided at the bottom of the first recess 212. The limiting portion 227 on the driving member can be snapped into the opening 219 to fix the driving member to the valve core. One side wall of the opening 219 is provided with a driving notch 219a. The drive projection on the valve body 10 can drive the drive member 22 to move through the drive notch 219a, so that the drive member 22 can be disengaged from the fixed connection with the spool, so that the drive member 22 can be rotated relative to the spool 21.

A second valve stem fitting hole 215 is provided on both sides of the first recess 212. A hanging mating surface 213 is provided on both sides of the rear side of the first recess 212. The first recess 212 is for mounting the drive member 22. The locking boss 214 is for mating with the locking cam 222 of the drive member 22. The second stem fitting hole 215 is for mounting the valve stem 30. The hanging mating surface 213 is for mating with the hanging platform 221. The second valve stem fitting hole 215 has a larger diameter than the outer diameter of the valve stem 30, so that the valve stem 30 can be rotated within the second stem fitting hole 215, which will be described in detail below.

As shown in FIG. 16, the side opposite to the side on which the guide portion 210 is provided, that is, the side surface 26 facing the inner valve seat 60 is provided with a second seal portion 216 and a third seal portion 217. The second seal portion 216 is radially outward relative to the third seal portion 217. When the valve is in the closed state, the second seal portion 216 is mated with the main seal portion 602 disposed on the inner valve seat 60, and the third seal portion 217 is mated with the first seal portion 604 on the inner valve seat 60, as will be further described below. Description.

As shown in FIGS. 10-12, the positioning member 24 has a cylindrical shape as a whole. A protruding block 240 is provided at one end of the positioning member 24. The end of the protruding block 240 is provided with a cam fitting surface 241. The cam engagement surface 241 is in contact with the control cam 223 of the drive member 22, thereby enabling relative movement of the positioning member 24 relative to the spool 21 by rotation of the drive member 22. A flange 242 is provided on both sides of the protruding block. A side of the flange 242 facing the projecting block is provided with a curved surface 243 for seating the locking cam 222 of the drive member 22. A limiting step 244 is further disposed on the positioning member 24. When the positioning member 24 moves in the guiding portion 210 of the valve body 21, the limiting step 244 axially limits the elastic member 23, so that the elastic member 23 can be positioned. The piece 24 exerts a force toward the drive member 22 such that the resilient member 23 can drive the keeper 24 out of the valve body to unlock.

In the present embodiment, the guide portion 210 is a radial through hole provided in the spool 21, however, those skilled in the art will appreciate that the guide portion 210 may be provided in other manners.

As shown in FIG. 3-4, during the installation, the elastic member 23 is sleeved on the positioning member 24, and is axially restricted by the limiting step 244 at one end. The driving member 22 is mounted on the first groove 212 of the valve body 21. And aligning the first stem mounting hole 224 of the driving member 22 with the second stem fitting hole 215, the valve stem 30 passing through the second stem mounting hole 215 on one side and the first stem mounting hole 224, Then, the second valve stem mounting hole 215 is inserted into the other side, thereby the valve core 21 and the driving member 22 are hinged together, and the positioning member 24 is movably restrained in the guiding portion 210 of the valve body 21, wherein The valve stem 30 is fixedly coupled to the drive member 22, that is, the valve stem 30 cannot be rotated within the first valve stem mounting hole 224 of the drive member 22, and the valve stem 30 is rotatable within the second valve stem mounting bore 224 of the spool 21, Therefore, the rotation of the valve rod 30 can drive the rotation of the driving member 22, so that the rotation of the valve rod 30 drives the driving member 22 to rotate and drives the positioning member 24 to move relative to the valve core 21.

13-15 illustrate structural views of an inner valve seat 60 in accordance with an embodiment of the present invention. As shown in Figures 13-15, the inner valve seat 60 has an annular body 601 and a sealing structure 603 extending inwardly from the inner circumferential surface of the annular body. The sealing structure 603 extends radially inward along the entire inner circumferential surface of the annular body and is sequentially provided with an elastic portion 604 and a first sealing portion 605. Preferably, the sealing structure 603 integrally extends from the inner circumferential surface of the annular body 601. The elastic portion 604 is an annular body having a smaller thickness relative to the annular body. The first seal portion 605 protrudes from the end of the elastic portion 604 toward the valve body, so that the first seal portion has a substantially hook shape as seen from the cross-sectional view of FIG.

A main seal portion 602 is also provided on the inner valve seat 60. The main seal portion 602 is located inside the top surface of the annular body 601. Here, the top surface of the annular body refers to the same side of the annular body as the convex direction of the first sealing portion 605.

When the valve is in the closed state, the main sealing portion 602 and the first sealing portion 605 press against the side of the valve body 21 facing the inner valve seat 60, that is, respectively pressing the second sealing portion 216 and the third sealing portion of the valve core 217.

Fig. 9 is a structural view showing a valve body. As shown in FIG. 9, a valve body mounting portion 11 is provided in the valve body 10. The spool mounting portion 11 is provided with a second recess 12. A valve stem positioning hole 13 is disposed on both sides of the second recess 12, wherein the connecting portion 211 of the spool 21 is installed in the second recess 12, and the valve stem 30 passes through the valve stem positioning hole 13 of the valve body 10 The second stem fitting hole 215 passing through one side of the connecting portion 211, the first stem fitting hole 224 passing through the driving member 22, the second stem fitting hole 215 passing through the other side of the connecting portion 211, and finally wearing The other side of the valve body 10 is inserted into the valve stem positioning hole 13 to rotatably connect the valve body 21 to the valve body 10.

As shown in FIGS. 9 and 16, a positioning member locking portion 14 and a driving projection 15 are provided on the inner side wall of the valve body 10, and the positioning member locking portion 14 is a recess. The positioning member locking portion 14 is used to limit the positioning member 24 in a straight direction, so that when the positioning member 24 is extended into position, the positioning member 24 is locked by the positioning member locking portion 14, which will be described in detail below. The drive projection 15 is located at the bottom wall of the second recess 12. The driving protrusion 15 is provided with a positioning surface 151 and a driving slope 152. During the closing of the valve, the drive ramp 152 drives the drive edge 226 on the drive member 22 when the valve is about to reach the closed position, thereby disengaging the drive member 22 from the fixed connection of the spool, such that the drive member is rotatable relative to the spool Then, the driving member 22 pushes the positioning member 24 to move into the positioning member locking portion 14 to realize the locking of the valve core. Before the valve reaches the closed position, the drive member 22 and the spool are fixedly coupled such that the drive member 22 cannot rotate relative to the spool, and the retaining member 24 does not protrude into the retainer lock portion 14. Thus, the valve does not lock in falsely until the valve actually reaches the closed position.

Figures 16-21B show transmission relationships of the valve of the present invention during the closing process. Among them, Figure 16 shows the valve open state. Figure 17 shows the valve close to the closed position but has not been closed. Figures 18-19 illustrate the first transmission relationship. 20A-20B illustrate a second transmission relationship. 21A-21B illustrate a third transmission relationship.

As shown in FIGS. 16-18, during the change of the valve from the open state to the closed state, the driving member 22 cooperates with the positioning member 24 under the elastic action of the elastic member 23 to form a relatively stationary first transmission relationship. The driving member 22 drives the spool 21 to rotate to close the spool 21. In the first transmission relationship, a force is applied to the spool 21 by the driving member 22 to close the spool 21. In the process, when the valve is about to reach the closed position, the valve stem is continuously rotated, and the valve stem drives the spool to continue to rotate via the driving member, and the driving protrusion 15 on the valve body 10 applies a force to the driving member, so that the driving member is disengaged. The spool is fixedly coupled such that upon reaching the valve closed position, the drive member is rotatable relative to the valve body.

As shown in FIGS. 20A-20B, when the first transmission relationship ends, the driving member 22 and the positioning member 24 are switched from the first transmission relationship to the second transmission relationship, and the driving member 22 presses the positioning member 24 to make the positioning member 24 relative to the positioning member 24. The relative movement of the spool 21, in the second transmission relationship, the control cam 223 on the drive member 22 cooperates with the cam engagement surface 241 on the positioning member 24, thereby driving the positioning member 24 in the spool by the downward rotation of the control cam 223 The positioning member guide portion 210 of the 21 is laterally moved against the elastic force of the elastic member 23 until the front end of the positioning member 24 projects into the positioning member locking portion 14 of the valve body 10, as shown in Figs. 20A-20B, at this time, the control cam The edge of the 223 is in contact with the bottom of the first groove 212 of the spool 21.

As shown in FIGS. 21A-21B, when the second transmission relationship ends, the driving member 22 and the positioning member 24 are switched from the second transmission relationship to the third transmission relationship between the driving member 22 and the spool 21, and the driving member 22 will position the positioning member 24. The control is in the extended state, so that the positioning member 24 is always in a state of being engaged with the valve body 10. The driving member 22 presses the spool 21 to perform a pressing movement in the valve diameter direction, thereby sealingly locking the valve core. In the third transmission relationship, the driving member 22 is synchronously rotated by the valve rod 30, and the control cam on the driving member 22 always controls the positioning member 24 in the extended state, and the locking cam 222 and the valve core 21 on the driving member 22 are controlled. The locking boss 214 cooperates to apply a force to the locking boss 214 through the control cam 222, so that the driving member 22 presses the spool 21 and the inner valve seat 60 to press the valve in the diameter direction of the valve under the action of the locking cam 222. During this movement, the positioning member 24 is always in the extended state, and forms a fulcrum rotational motion with the positioning member locking portion 14 of the valve body 10 until the valve stem 30 is rotated into position, and the spool 21 is locked.

The transmission relationship of the valve opening process is opposite to the transmission relationship of the valve closing process, and those skilled in the art will readily understand that it will not be described in detail herein. It should be noted that during the opening of the valve, the driving member 22 realizes the force transmission through the cooperation of the hanging table 221 of the driving member 22 and the hanging surface matching surface 213 of the valve core 21, that is, the hanging platform 221 is The hanging mating surface 213 exerts a force to achieve opening of the spool 21.

22-35 show structural views of a valve in accordance with another embodiment of the present invention. As shown in Fig. 22-35, the main difference between the embodiment and the embodiment shown in Fig. 1-21B is the anti-false closing device of the valve, and the rest are basically the same, and will not be described in detail again. In the embodiment shown in FIG. 1-21B, the anti-false closing device mainly comprises a driving protrusion and a driving member disposed on the valve body and a corresponding structure on the valve core, and the driving protrusion drives the driving member to drive the driving member Converting from the first relative positional relationship of the spool to the relatively non-rotatable relative position to the second relative positional relationship of the driving member and the valve core. In the first relative positional relationship, the driving member cannot drive the positioning member, and the positioning member is not caused to be mistaken Extending to make the valve falsely locked, and in the second relative positional relationship, the driving member can drive the positioning member to move, thereby achieving the locking of the valve.

In the valve embodiment illustrated in Figures 22-35, the anti-false closure device includes a drive step 228 disposed on the spool and a drive rib 16 disposed on the valve body. When the valve is about to reach the closed position, when the valve stem continues to be rotated, the drive rib 16 drives the drive step 228 on the spool, so that the spool moves relative to the drive member, causing the drive member to transition from a non-rotatable state relative to the spool The state in which the spool is rotatable. Thus, before the valve reaches the closed position, the driving member is not rotatable relative to the spool, and thus the positioning member cannot be driven to move, so that the valve cannot be locked, thereby preventing the valve from being accidentally closed or falsely closed.

As shown in FIG. 23, the main difference between the driving member 22a of the present embodiment and the driving member shown in FIG. 5-6 is that in the embodiment, the driving member 22a cancels the elastic portion 225, the passive portion 226, and the limit. Part 227, the rest are the same, and will not be described in detail again.

As shown in Figs. 23-24, the valve body 21a of the present embodiment is provided with a guide portion 210a and a connecting portion 211a. Preferably, the guide portion 210a is a hole that extends transversely through the valve body 21a. The positioning member 24 projects into the guide portion 210a and is slidable within the guide portion 210. One end of the valve body 21a is provided with a connecting portion 211a, and the other end of the valve body opposite to the connecting portion 211a is provided with a driving step 228 (also referred to as a passive portion). The connecting portion 211a is formed integrally projecting outward from the edge of the valve body 21a at one end of the guiding portion 210a. A first recess 212a is provided in the middle of the connecting portion 211a. A locking boss 214a is provided at the bottom of the first recess 212a. A second stem fitting hole 215a is provided on both sides of the first recess 212a. A hanging mating surface 213a is provided on both sides of the rear side of the first recess 212a. The first recess 212a is for mounting the driving member 22a. The locking boss 214a is for engaging with the locking cam 222 of the drive member 22. The second stem fitting hole 215a is for mounting the valve stem 30a. The hanging mating surface 213 is for mating with the hanging platform 221. Each of the valve stem fitting holes 215a is provided with a waist hole 215a1 and a lateral hole 215a2 which communicate with each other, and the hole diameter of the waist hole 215a1 is larger than the outer diameter of the valve stem 30, so that the valve stem 30 can be rotated in the waist hole 215a1. The diameter of the transverse hole 215a2 is smaller than the outer diameter of the valve stem 30, so that the valve stem 30 cannot be rotated within the waist hole 215a2. During the valve closing process, when the valve reaches the position to be closed, the valve body drives the spool to move, so that the valve stem moves from the transverse hole to the waist hole, and the valve stem can rotate relative to the valve core, and the valve stem drives The drive member rotates relative to the spool. This will be described in detail below.

As shown in Fig. 23, the valve body 10a of the present embodiment is different from the valve body shown in Fig. 9 in that the valve body 10a is not provided with the driving projection 15, but is disposed at another position of the inner wall of the valve body. The rib 15a is driven. The rest are the same and will not be described in detail here. In the present embodiment, the driving rib 15a is located at a position opposed to the spool mounting portion 11a. The driving rib 15a is arranged to start driving the spool to move relative to the valve stem when the valve is about to reach the closed position, and to move the valve stem from the transverse hole to the waist hole when the valve reaches the closed position, so that the valve stem can be opposite to the valve stem The spool rotates, thereby driving the driving member to rotate relative to the spool, so that the driving member drives the positioning member to move and realize the locking of the valve. The driving rib 15a is provided with a driving slope 15a1. The drive ramp 15a1 cooperates with a drive step 228 on the spool to drive the spool to move relative to the valve stem.

Figures 26-35 show process diagrams of the valve from an open state to a lock-tight condition. As shown in Figure 26-35, when the valve is open, the valve stem is located in the transverse bore, whereby the rotation of the valve stem drives the spool to rotate, thereby closing the valve. The valve stem cannot be relative to the valve before the valve reaches the closed position. The spool rotates and the drive member cannot rotate relative to the spool (first transmission relationship). When the valve is about to reach the closed position, the drive ribs on the valve body actuate the spool relative to the valve stem such that the valve stem gradually moves from the transverse bore to the waist bore. When the valve reaches the closed position, the stem fully enters the waist hole and can rotate within the waist hole, as shown in Figure 31-32. At this time, the rotation of the valve stem drives the driving member to rotate, so that the driving member drives the positioning member to move, thereby realizing the locking of the valve (ie, the second transmission relationship), as shown in FIGS. 33-34. Further rotating the valve stem, the driving member presses the valve core and the inner valve seat to perform a pressing movement in the direction of the valve diameter, thereby completing the sealing of the invention.

In the present invention, as a preferred mode, the positioning member is a positioning rod, and the elastic member is a compression spring. However, those skilled in the art can understand that the positioning member can also adopt other forms, and the elastic member can also adopt other elastic members such as rubber stoppers, and the positioning member and the elastic member can also be integrally formed, see below. The embodiment is described.

Although in the embodiments described above, the positioning member and the elastic member are separate members. However, in another embodiment, the positioning member and the elastic member may be an integral member. At this time, the elastic member is disposed on the positioning member, for example, by providing elastic ribs on the outer circumference of the positioning member, and at this time, the elastic rib is used as the elastic When the positioning member is installed in the guiding portion of the valve core, the elastic rib cooperates with one end of the guiding portion, so that a force is applied to the elastic rib through one end of the guiding portion to unlock the positioning member.

In another embodiment, a groove may be provided on the positioning member, an elastic member is disposed in the groove, and a stopper portion (such as a stopper pin protruding downward from the upper side wall of the guide portion or a stop post, etc.), the stopping portion extends into the groove and compresses the elastic member, so that when the positioning member moves relative to the driving member, the elastic member applies an elastic force to the positioning member under the action of the stopping portion to realize the positioning member Unlock.

It should be understood that although the present invention has been described above with an articulated valve, it should be understood that the sealing principle and related structure between the inner valve seat and the valve core of the present invention, particularly the structure of the inner valve seat, It can be used in other inventions such as ball valves, particularly such valves, in which the spool is capable of squeezing movement relative to the valve body inner valve seat and having a component of movement along the axis of the flow passage of the valve body. An example of such a valve is described in the Chinese Patent No. CN103016776B, the contents of which are incorporated herein by reference in its entirety.

The valve of the present invention is provided with a false-proof closing device and a sealing structure, so that even if the valve is applied to a viscous liquid, the valve is not falsely closed (false locking), that is, before the valve reaches the closed position. The spool will not lock. The sealing structure seals and/or fills the gap formed between the valve body, the inner valve seat and the valve core, thereby reducing or even eliminating residual liquid in the space between the valve body of the valve, the valve body and the inner valve seat And the sealing effect is good.

Aspects of the embodiments can be modified, as needed, to provide additional embodiments in terms of aspects, features, and concepts of various patents, applications, and publications.

These and other changes can be made to the embodiments in light of the above detailed description. In general, the terms used in the claims are not to be construed as limited to the specific embodiments disclosed in the description and the claims. range.

Claims

A valve includes a valve body, a valve stem and a spool assembly, the spool assembly being mounted in the valve body and including a spool, the spool being hinged to the valve body, wherein the spool The assembly further includes a drive member, a positioning member and an elastic member, wherein the positioning member is movably mounted to the spool, the elastic member being mounted between the positioning member and the spool, wherein The cooperation relationship between the driving member and the valve core is switchable under the action of the valve body: when the valve is in an open state, the driving member cooperates with the valve core to form an integral unit that moves integrally, and drives the The spool performs a closing valve, and when the valve reaches the closed position, the driving member cooperates with the valve core to form a relatively movable single piece under the action of the valve body.
The valve according to claim 1 wherein said spool and said drive member are arranged to actuate said drive member and said valve under action of said valve body when said valve reaches a closed position The core transitions from a relatively non-rotatable first relative positional relationship to a second relative positional relationship in which the drive member is rotatable relative to the spool.
The valve according to claim 1, wherein an inner wall of the valve body is provided with a driving portion, and the valve body and the driving member are disposed to be relatively movable under the action of the driving portion, thereby The drive member and the spool are converted from a relatively non-rotatable first relative positional relationship to a second relative positional relationship in which the drive member is rotatable relative to the spool.
A valve according to claim 1, wherein said driving member is fixedly coupled to said valve body in a valve open state, and said inner wall of said valve body is provided with a projection, said projection being disposed in said The driving member is driven to move during the closing of the valve, and when the valve reaches the closed position, the driving member is disengaged from the valve core and fixedly connected.
A valve according to claim 1, wherein one end of said valve body is provided with a connecting portion, said connecting portion being provided with a groove and a valve stem fitting hole on both sides of said groove, said groove The bottom portion is provided with an opening, and the driving member has a main body, the main body extends out of the elastic portion, and the end of the elastic portion is provided with a limiting portion and a passive portion, wherein the driving member is received in the groove, The limiting portion cooperates with the opening such that the drive member is detachably coupled to the spool, and the passive portion is engageable with the valve body to urge the drive member to move relative to the spool.
The valve according to claim 5, wherein one side wall of the opening of the valve body is provided with a driving notch, a passive portion of the driving member includes a driving edge, and the valve body is provided Driving a projection, wherein the drive projection is capable of driving the drive edge through the drive notch to drive the drive member relative to the spool.
A valve according to claim 5, wherein said driving member is provided with a driving cam, and said driving cam is disposed on a side of said main body opposite to a side on which said elastic portion is provided, wherein The drive cam is used to drive the positioning member to move.
The valve according to claim 1, wherein one end of the valve body is provided with a connecting portion, and the other end is provided with a passive portion, wherein the connecting portion is provided with a groove and is respectively located on both sides of the groove. Two mounting holes, each of which is provided with a waist hole and a transverse hole that communicate with each other, and the passive portion drives the spool movement under the action of the valve body during closing of the valve Actuating the drive member from the transverse bore to the waist hole and enabling the drive member to rotate relative to the spool.
The valve according to claim 8, wherein said valve body is provided with a driving rib at a position corresponding to a passive portion of said spool, wherein said driving rib is disposed to be in a process of closing said valve Cooperating with the passive portion of the spool to drive the spool movement.
The valve of claim 1 wherein said valve further comprises an inner valve seat, said inner valve seat being mounted within said valve body, said inner valve seat having an annular body and a sealing structure, wherein said seal The structure is configured to seal and/or fill a gap formed between the valve body, the inner valve seat, and the spool when the valve is in a closed state.
The valve according to claim 10, wherein said sealing structure extends inwardly from an inner circumferential surface of said annular body.
The valve according to claim 10, wherein said sealing structure extends inwardly along an entire inner circumferential surface of said annular body and is sequentially provided with an elastic portion and a first sealing portion, wherein said first sealing portion is disposed The side of the spool facing the inner valve seat is pressed against when the valve is in the closed state.
The valve according to claim 12, wherein said first seal portion projects from the end of said elastic portion toward said valve body.
A valve according to claim 12, wherein said inner valve seat is further provided with a main seal portion, wherein said main seal portion is provided on said annular body and arranged to abut when said valve is in a closed state Pressing a side surface of the valve body facing the inner valve seat, and a position of the main seal portion pressing against the spool is radially larger than a position at which the first seal portion presses the spool outer.
The valve according to claim 14, wherein a side of said valve body facing said inner valve seat is provided with a second seal portion and a third seal portion, wherein said second seal portion is opposite said third portion The seal portion is radially outward, and when the valve is in a closed state, the second seal portion is mated with the main seal portion, and the third seal portion is mated with the first seal portion.
A valve according to claim 1 wherein said valve body is hinged to said valve body and said valve further comprises a handle and a valve stem, wherein said handle is provided with a drive gear, said valve stem being provided A driven gear that cooperates with the driven gear such that rotation of the handle drives rotation of the valve stem and thereby drives the spool to rotate.
The valve of claim 1 wherein said spool is hinged to said valve body and said valve further comprises a handle and a valve stem, wherein said handle and said valve stem have axes of rotation of different axes The handle and the valve stem have a synchronous rotating transmission relationship, and the rotation of the handle is transmitted to the valve stem to perform a synchronous rotation angle amplifying motion, and thereby the spool is driven to rotate.
The valve according to claim 1, wherein said valve further comprises an inner valve seat, said inner valve seat being mounted in said valve body, and said inner valve seat being disposed when said valve is in a closed state The inner valve seat seals and/or fills a gap formed between the inner valve seat, the valve body and the valve body.
A valve according to any one of claims 1 to 18, wherein said drive member, said valve body and said positioning member are arranged such that said valve has the following three transmission relationships during closing: a first transmission relationship, wherein the driving member and the positioning member are relatively stationary, the driving member drives the spool to rotate to close the spool, and when the first transmission relationship ends, the driving member, the The spool and the positioning member are switched from the first transmission relationship to the second transmission relationship, wherein the driving member drives the positioning member to cause relative movement of the positioning member relative to the spool; when the second transmission relationship At the end, the driving member, the valve core and the positioning member are switched to a third transmission relationship by a second transmission relationship, wherein the driving member controls the positioning member in an extended state, so that the positioning member Always in a state of being engaged with the valve body, the driving member presses the spool to perform a pressing movement toward the valve diameter direction, thereby sealingly locking the valve core.
A valve includes a valve body, a valve stem, a valve seat and a spool assembly, the spool assembly being mounted in the valve body and including a spool, the spool being hinged to the valve body, wherein The valve core assembly further includes a driving member, a positioning member and an elastic member, wherein the positioning member is movably mounted on the valve core, and the elastic member is mounted between the positioning member and the valve core, And the drive member, the spool, and the positioning member are arranged such that the valve has the following three transmission relationships during the closing process: a first transmission relationship, wherein the drive member and the positioning member are relatively stationary The driving member drives the spool to rotate to close the spool; when the first transmission relationship ends, the driving member, the spool and the positioning member are switched from the first transmission relationship to the second transmission a relationship, wherein the driving member drives the positioning member to cause relative movement of the positioning member relative to the spool; when the second transmission relationship ends, the driving member, the spool, and the positioning member Switched by the second transmission relationship a third transmission relationship, wherein the driving member controls the positioning member in an extended state such that the positioning member is always in a state of being engaged with the valve body, and the driving member presses the spool to the valve Performing a pressing movement in the radial direction to seal the valve core; and the valve further includes a false-proof closing device, wherein the anti-false closing device includes a driving portion disposed on an inner wall of the valve body And a clutch structure disposed on the spool assembly, the drive portion being arranged to drive the clutch structure such that in the first transmission relationship, the drive member and the spool are relatively non-rotatable The first relative positional relationship is translated to a second relative positional relationship in which the drive member is rotatable relative to the spool.
A valve according to claim 20, wherein said driving member is fixedly coupled to said valve body in a valve open state, and said driving portion is a projection provided on an inner wall of said valve body, The projection is configured to drive the drive member to move during closing of the valve and to disengage the drive member from the spool when the valve reaches the closed position.
A valve according to claim 20, wherein one end of said valve body is provided with a connecting portion, said connecting portion being provided with a groove and a valve stem fitting hole on both sides of said groove, said groove The bottom portion is provided with an opening, and the driving member has a main body, the main body extends out of the elastic portion, and the end of the elastic portion is provided with a limiting portion and a passive portion, wherein the driving member is received in the groove, The limiting portion cooperates with the opening such that the drive member is detachably coupled to the spool, and the passive portion is engageable with the valve body to urge the drive member to move relative to the spool.
The valve according to claim 22, wherein one side wall of the opening of the valve body is provided with a driving notch, a passive portion of the driving member includes a driving edge, and the valve body is provided Driving a projection, wherein the drive projection is capable of driving the drive edge through the drive notch to drive the drive member relative to the spool.
A valve according to claim 22, wherein said driving member is provided with a driving cam, and said driving cam is disposed on a side of said main body opposite to a side on which said elastic portion is provided, wherein The drive cam is used to drive the positioning member to move.
The valve according to claim 20, wherein one end of the valve body is provided with a connecting portion, and the other end is provided with a passive portion, wherein the connecting portion is provided with a groove and respectively located on both sides of the groove Two valve stem fitting holes, each of the fitting holes being provided with a waist hole and a transverse hole communicating with each other, and the passive portion drives the valve under the action of the valve body during closing of the valve The core moves such that the valve stem moves from the transverse bore to the waist aperture and enables the drive member to rotate relative to the spool.
A valve according to claim 25, wherein said valve body is provided with a driving rib at a position corresponding to a passive portion of said spool, wherein said driving rib is disposed to be in a process of closing said valve Cooperating with the passive portion of the spool to drive the spool movement.
The valve according to claim 20, wherein said valve further comprises an inner valve seat, said inner valve seat being mounted in said valve body, said inner valve seat having an annular body and a sealing structure, wherein said seal The structure is configured to seal and/or fill a gap formed between the valve body, the inner valve seat, and the spool when the valve is in a closed state.
The valve according to claim 27, wherein said sealing structure extends inwardly from an inner circumferential surface of said annular body.
A valve according to claim 27, wherein said sealing structure extends inwardly along the entire inner circumferential surface of said annular body and is provided with a resilient portion and a first sealing portion in sequence, wherein said first sealing portion is disposed The side of the spool facing the inner valve seat is pressed against when the valve is in the closed state.
The valve according to claim 29, wherein said first seal portion projects from an end of said elastic portion toward said valve body.
A valve according to claim 29, wherein said inner valve seat is further provided with a main seal portion, wherein said main seal portion is provided on said annular body and arranged to abut when said valve is in a closed state Pressing a side surface of the valve body facing the inner valve seat, and a position of the main seal portion pressing against the spool is radially larger than a position at which the first seal portion presses the spool outer.
The valve according to claim 31, wherein a side of said valve body facing said inner valve seat is provided with a second seal portion and a third seal portion, wherein said second seal portion is opposite said third portion The seal portion is radially outward, and when the valve is in a closed state, the second seal portion is mated with the main seal portion, and the third seal portion is mated with the first seal portion.
A valve according to claim 20, wherein said valve body is hinged to said valve body and said valve further comprises a handle and a valve stem, wherein said handle is provided with a driving gear, said valve stem being provided A driven gear that cooperates with the driven gear such that rotation of the handle drives rotation of the valve stem and thereby drives the spool to rotate.
The valve of claim 20 wherein said valve spool is hinged to said valve body and said valve further comprises a handle and a valve stem, wherein said handle and said valve stem have axes of rotation of different axes The handle and the valve stem have a synchronous rotating transmission relationship, and the rotation of the handle is transmitted to the valve stem to perform a synchronous rotation angle amplifying motion, and thereby the spool is driven to rotate.