CN110185819B - Stop valve - Google Patents

Abstract

The embodiment of the invention provides a stop valve, and relates to the technical field of valves. The stop valve comprises a valve core, balls, a valve rod and a valve seat provided with an outflow port, wherein the valve seat is provided with a circulation cavity communicated with the outflow port, the balls and the valve core are arranged in the circulation cavity at intervals, and the valve core divides the circulation cavity into a first cavity and a second cavity. The valve rod is connected with the ball and the valve core simultaneously, and can drive the ball and the valve core to rotate relative to the valve seat, so that the first cavity, the second cavity and the outflow port are communicated or disconnected simultaneously. The stop valve is ingenious in design and simple in structure, has the functions of secondary leakage prevention, pressure reduction and flow resistance, enhances the leakage prevention effect, and can automatically adjust the fluid flow speed according to the fluid pressure, so that the purposes of pressure reduction and flow stabilization are achieved, and the safety and tightness of the stop valve are improved.

Description

Stop valve

Technical Field

The invention relates to the technical field of valves, in particular to a stop valve.

Background

The traditional liquid leakage-proof structures are primary leakage-proof structures, such as a valve, a tap and the like, and the valve core is upwards moved to pull up a gasket for sealing fluid by upwards rotating a handle, so that the fluid is released; the handle is rotated downwards, and the fluid channel is sealed by pressing down the gasket, so that the fluid leakage is blocked.

The leak protection structure is single, and security and tightness are relatively poor.

Disclosure of Invention

The object of the present invention includes, for example, providing a shut-off valve having a secondary leakage prevention function, enhancing the leakage prevention effect, and improving safety and tightness.

Embodiments of the invention may be implemented as follows:

The embodiment of the invention provides a stop valve, which comprises a valve core, a ball, a valve rod and a valve seat provided with an outflow port, wherein the valve seat is provided with a circulation cavity communicated with the outflow port;

The valve rod is connected with the ball and the valve core simultaneously, and can drive the ball and the valve core to rotate relative to the valve seat, so that the first cavity, the second cavity and the outflow port are communicated or disconnected simultaneously.

Optionally, the valve seat is provided with a first flow hole, the valve core is provided with a second flow hole, and when the valve core rotates relative to the valve seat, the second flow hole is communicated with or disconnected from the first flow hole.

Optionally, a flow dividing ring is arranged on the inner wall of the valve seat, the flow dividing ring divides the first cavity into a first channel and a second channel, and the first channel is communicated with the first flow hole;

A third channel communicated with the second channel is formed between the valve core and the shunt ring, and the valve core can move relative to the valve seat along the axial direction of the valve core under the action of external force so as to close the third channel.

Optionally, the valve core is provided with a first conical surface, the split ring is provided with a second conical surface, the third channel is surrounded by the first conical surface and the second conical surface, and the small end of the first conical surface faces towards the ball.

Optionally, the valve core is provided with a return spring, one end of the return spring is propped against the valve core, the other end of the return spring is propped against the valve rod, and the return spring extends along the axial direction of the valve core, so that the valve core has a reset trend under the action of external force.

Optionally, the case includes fixed connection's regulation portion and grafting portion, and the grafting groove has been seted up along the axial to grafting portion, and the return spring inlays and locates in the grafting groove, and the valve rod is pegged graft in the grafting groove and with return spring butt.

Optionally, the adjusting part is of a truncated cone structure and is provided with a peripheral wall and a small end wall, and the second flow hole is formed in the adjusting part and penetrates the peripheral wall and the small end wall.

Optionally, the valve seat comprises a first valve body and a second valve body which are fixedly connected, the outflow opening is formed in the first valve body, the ball is rotatably embedded in the first valve body, the valve core is movably arranged in the second valve body, and the valve rod is in transmission connection with the valve core after penetrating through the first valve body and the ball.

Optionally, the ball is provided with a through hole and a third through hole, the valve rod is arranged through the through hole and is in transmission connection with the ball, and when the ball rotates, the second cavity, the third through hole and the outflow hole are simultaneously connected or disconnected.

Optionally, the valve rod comprises a first plug-in section and a second plug-in section, the first plug-in section is positioned at the end part, the valve core is provided with a plug-in groove along the axial direction, the first plug-in section is in plug-in fit with the plug-in groove, the ball is provided with a through hole, and the second plug-in section is arranged through the through hole;

The cross sections of the first inserting section, the second inserting section, the inserting groove and the through hole are non-circular, so that the valve rod is in transmission connection with the ball and the valve core at the same time.

The stop valve of the embodiment of the invention has the beneficial effects that: the ball and the valve core are arranged in the circulation cavity at intervals, and the valve rod can drive the ball and the valve core to rotate relative to the valve seat, so that the first cavity, the second cavity and the outflow opening are simultaneously communicated or disconnected, a secondary leakage-proof function is realized, a leakage-proof effect is enhanced, and the safety and the tightness of the stop valve are improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of a shut-off valve;

Fig. 2 is a cross-sectional view of a first case where the shut-off valve is in a communication state;

FIG. 3 is a cross-sectional view of the shut-off valve in an open state;

FIG. 4 is a cross-sectional view of the valve seat of FIG. 2;

FIG. 5 is a cross-sectional view of the first valve body of FIG. 4;

FIG. 6 is a cross-sectional view of the second valve body of FIG. 4;

FIG. 7 is a schematic view of the ball of FIG. 1;

FIG. 8 is a cross-sectional view of a ball;

FIG. 9 is a schematic view of the valve cartridge of FIG. 1;

FIG. 10 is a cross-sectional view of the valve cartridge;

FIG. 11 is a schematic illustration of the valve stem of FIG. 1;

Fig. 12 is a sectional view of the second case of the open state of the shut-off valve.

Icon: 100-stop valve; 10-valve seat; 11-a second valve body; 112-a shunt ring; 113-a first channel; 114-a second channel; 115-a second conical surface; 116-a first flow hole; 12-a first valve body; 121-outflow opening; 124-a first cavity; 127-a second cavity; 13-a valve core; 132-a third channel; 134-a second flow aperture; 135-first conical surface; 136-an adjusting part; 137-plug-in part; 138-plug-in grooves; 14-a return spring; 15-balls; 152-a third flow aperture; 155-a through hole; 18-valve stem; 181-a first plug section; 182-a second plug section; 19-handle.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Examples

Fig. 1 is an exploded view of a shut-off valve 100 according to the present embodiment, fig. 2 is a cross-sectional view of the shut-off valve 100 in a connected state, and fig. 3 is a cross-sectional view of the shut-off valve 100 in a disconnected state, as shown in fig. 1, 2 and 3.

Because the existing valve is of a primary leakage-proof structure, when the gasket inside the valve is damaged, the phenomenon of fluid leakage is inevitably generated, so that the tightness is poor, and a safety mechanism is not provided. When the valve is used for sealing dangerous fluid, once the fluid leakage accident occurs, the valve is highly likely to cause casualties or property loss, so that the safety is poor.

The stop valve 100 provided in this embodiment has two-stage leakage prevention function, the first stage is a matching structure between the valve core 13 and the valve seat 10, and the second stage is a matching structure between the ball 15 and the valve seat 10, so that the tightness and safety performance of the stop valve 100 for fluid sealing are enhanced through two-stage leakage prevention.

In addition, the shut-off valve 100 provided in this embodiment uses the split flow action of the split flow ring 112 on the valve seat 10 on the fluid and the impact force of the fluid on the valve core 13 due to the matching structure of the valve core 13 and the valve seat 10, so as to achieve the purpose of automatically adjusting and stabilizing the fluid flow rate according to the fluid pressure.

Specifically, please refer to fig. 1. The shut-off valve 100 includes a valve seat 10, a ball 15, a spool 13, and a valve stem 18.

The valve seat 10 has a flow chamber, and one end of the valve seat 10 is provided with an outflow port 121, and the outflow port 121 is communicated with the flow chamber. The ball 15 and the spool 13 are disposed in the flow chamber of the valve seat 10 at intervals such that the spool 13 divides the flow chamber into a first chamber 124 and a second chamber 127.

Optionally, the valve core 13 is located at the middle position of the valve seat 10, the valve core 13 is matched with the valve seat 10, and the first cavity 124 and the second cavity 127 are connected or disconnected through the rotation of the valve core 13 relative to the valve seat 10, so that the first-stage leakage prevention is realized; the ball 15 is located at one end of the valve seat 10 near the outflow port 121, the ball 15 cooperates with the valve seat 10, and the second cavity 127 is communicated or blocked from the outflow port 121 by rotation of the ball 15 relative to the valve seat 10, so that the second-stage leakage prevention is realized.

The valve rod 18 is in transmission connection with the ball 15 and the valve core 13 at the same time, and the ball 15 and the valve core 13 are driven to rotate relative to the valve seat 10 by rotating the valve rod 18, so that the first cavity 124, the second cavity 127 and the outflow port 121 are simultaneously communicated or disconnected.

Wherein, the valve seat 10 is provided with a first flow hole 116, the valve core 13 is provided with a second flow hole 134 which can be communicated with the first flow hole 116, and when the valve core 13 rotates relative to the valve seat 10, the second flow hole 134 is communicated with or disconnected from the first flow hole 116. The ball 15 is provided with a third through-hole 152, and the third through-hole 152 can be simultaneously connected to or disconnected from the second chamber 127 and the outflow port 121 when the ball 15 rotates with respect to the valve seat 10.

Referring to fig. 2, when the valve rod 18 is rotated, the valve rod 18 drives the valve core 13 and the ball 15 to rotate relative to the valve seat 10, when the second flow hole 134 on the valve core 13 corresponds to the first flow hole 116 on the valve seat 10, the first cavity 124 and the second cavity 127 are communicated, and in this state, the third flow hole 152 on the ball 15 corresponds to the second cavity 127 and the outflow hole 121, so that the second cavity 127 communicates with the outflow hole 121, and the stop valve 100 is in an open state, so that fluid flows smoothly.

As shown in fig. 3, the valve rod 18 is continuously rotated, the valve rod 18 drives the valve core 13 and the ball 15 to rotate relative to the valve seat 10, when the second flow hole 134 on the valve core 13 is dislocated from the first flow hole 116 on the valve seat 10, the first cavity 124 and the second cavity 127 are blocked by the valve core 13, and in this state, the third flow hole 152 on the ball 15 is dislocated from the second cavity 127 and the outflow hole 121, so that the second cavity 127 and the outflow hole 121 are blocked by the ball 15, and the stop valve 100 is in a closed state, so that the fluid is blocked and is not easy to leak.

The specific structure of each component of the shut-off valve 100 and the correspondence relationship therebetween will be described in detail.

First, the specific structure of the valve seat 10 will be described in detail, and fig. 4 is a cross-sectional view of the valve seat 10, and please refer to fig. 4.

The inner wall of the valve seat 10 is provided with a flow dividing ring 112, the flow dividing ring 112 divides the first cavity 124 into a first channel 113 and a second channel 114, and the first channel 113 is communicated with a first flow hole 116 formed in the valve seat 10.

The valve core 13 is disposed inside the shunt ring 112, and a third channel 132 is formed between the valve core 13 and the shunt ring 112, the third channel 132 is communicated with the second channel 114, when the valve core 13 moves axially relative to the valve seat 10 under the action of an external force (impact force of fluid), and when the external force is greater than the restoring force of the valve core 13 for automatic resetting, the valve core 13 moves axially and is attached to the inner wall of the shunt ring 112 to close the third channel 132; when the external force is smaller than the restoring force of the automatic reset of the valve core 13, the valve core 13 moves along the axial direction but cannot be attached to the inner wall of the shunt ring 112.

Under the action of external force, the valve core 13 moves axially relative to the valve seat 10, so that the steady flow effect can be realized, namely when the stop valve 100 is in an open state, and when the fluid pressure is high, the external force pushes the valve core 13 to close the third channel 132, and the fluid only enters the second cavity 127 from the first channel 113 through the first flow hole 116 and the second flow hole 134 and then flows out, so that the flow rate of the fluid is reduced; when the fluid pressure is smaller, the valve core 13 is pushed by the external force but the third channel 132 is not closed, at this time, a part of the fluid enters the second cavity 127 from the first channel 113, the first flow hole 116 and the second flow hole 134, and another part of the fluid enters the second cavity 127 from the second channel 114 and the third channel 132, so that the flow velocity of the fluid is increased, and the steady flow effect is realized.

Specifically, the split ring 112 is located at a middle position of the valve seat 10 along an axial direction, one end of the split ring 112 is fixedly connected with the valve seat 10, the other end extends towards a direction away from the outflow port 121, the extending end is a split end, the first cavity 124 is divided into a first channel 113 and a second channel 114 by the split ring 112, the first flow hole 116 is formed in the circumferential direction at one end of the split ring 112 connected with the valve seat 10, so that fluid is split into two branches through the split end, and then is collected through the first flow hole 116.

Specifically, the split ring 112 is configured to cooperate with the valve core 13, and the second through hole 134 formed on the valve core 13 corresponds to the first through hole 116 formed on the split ring 112, so that the first through hole 116 and the second through hole 134 are connected or disconnected by rotation of the valve core 13, thereby realizing first-stage leakage prevention.

Optionally, the split ring 112 has a circular ring structure, and one end of the split ring 112 near the outflow port 121 is a connection portion, and the connection portion is fixedly connected to the inner wall of the valve seat 10, and in this embodiment, the split ring 112 and the valve seat 10 are integrally formed. The end of the flow divider 112 remote from the outflow opening 121 is an open flow divider end, so that the fluid is divided from the flow divider end.

In order to automatically adjust according to the water flow pressure to realize the purpose of stabilizing the flow, and the stabilizing effect is better, optionally, the valve core 13 is provided with a first conical surface 135, the inner wall of the connecting portion of the split ring 112 is provided with a second conical surface 115, and the small end of the first conical surface 135 faces the ball 15, so that the valve core 13 moves along the axial direction towards the ball 15 under the action of external force. The first conical surface 135 of the valve core 13 is matched with the second conical surface 115 of the split ring 112, and the third channel 132 is defined by the first conical surface 135 and the second conical surface 115, when the impact force of the fluid is large, the fluid impacts the valve core 13, so that the first conical surface 135 of the valve core 13 is attached to the second conical surface 115 of the split ring 112, and the third channel 132 is closed.

In the present embodiment, the connecting portion of the split ring 112 is provided with a plurality of first flow holes 116 at intervals in the circumferential direction.

For ease of installation and removal, the valve seat 10 optionally includes a fixedly connected first valve body 12 and second valve body 11.

Fig. 5 is a cross-sectional view of the first valve body 12 in fig. 4, and fig. 6 is a cross-sectional view of the second valve body 11 in fig. 4, referring to fig. 5 and 6.

The outflow opening 121 is formed in the first valve body 12, the ball 15 is rotatably embedded in the first valve body 12, the split ring 112 is located on the inner wall of the second valve body 11, and the first valve body 12 is located on a side, facing away from the split end, of the split ring 112. The valve core 13 is movably arranged in the second valve body 11 and matched with the split ring 112, and the valve rod 18 penetrates through the first valve body 12 and the ball 15 and is in transmission connection with the valve core 13.

As shown in fig. 5, the first valve body 12 includes an outflow branch pipe and a valve main body fixedly connected, the valve main body having a first sealing portion and a second sealing portion, the first sealing portion being located between the outflow branch pipe and the second sealing portion. Wherein, first sealing portion has and inlays and establish the chamber with ball 15 complex, so that ball 15 rotatable setting is in inlaying and establish the intracavity, second sealing portion has the intercommunication chamber, this first sealing portion has seted up with the first through-hole of outflow branch pipe intercommunication, with the second through-hole of intercommunication chamber intercommunication, and with valve rod 18 rotatable complex third through-hole, after ball 15 sets up in inlaying and establishes the intracavity, valve rod 18 passes first sealing portion and ball 15 in proper order, valve rod 18 and ball 15 transmission cooperation, thereby drive ball 15 and rotate for first sealing portion.

Optionally, the cross section of the third through hole is a circular hole, and the inner wall of the second sealing part is provided with an internal thread connected with the second valve body 11.

In this embodiment, the first valve body 12 is in threaded connection with the second valve body 11, so that the installation and the disassembly are convenient, and the tightness is good, and it can be understood that the first valve body 12 and the second valve body 11 can be in other connection modes, so long as the disassembly and the assembly can be convenient, and the tightness can be satisfied, and the limitation is not made here.

As shown in fig. 6, specifically, the second valve body 11 includes a seat body, a first connecting portion and a second connecting portion, where the first connecting portion and the second connecting portion are located at two sides of the seat body respectively, the first connecting portion is used for being fixedly connected with the first valve body 12, the second connecting portion is used for being fixedly connected with an external fluid pipeline, the above-mentioned shunt ring 112 is fixed in the seat body, and the shunt ring 112 extends from the first connecting portion to the second connecting portion.

The inner wall of the shunt ring 112, which is close to the first connecting portion, is provided with a second conical surface 115, the small end of the second conical surface 115 is close to the first connecting portion with respect to the large end, the shunt end of the shunt ring 112 shunts the inner cavity of the seat body into a first channel 113 and a second channel 114, since the position of the shunt ring 112, which is close to the first connecting portion, is provided with a first flow hole 116 along the circumferential direction, the first flow hole 116 is communicated with the first channel 113, and the second conical surface 115 is matched with the first conical surface 135 of the valve core 13, and the first flow hole 116 is communicated with the second flow hole 134, so that the function of automatically adjusting the flow speed of the stop valve 100 according to the fluid pressure is realized.

Optionally, the first connection portion and the second connection portion are both provided with external threads.

Next, a specific structure of the ball 15 will be described in detail, fig. 7 is a schematic view of the ball 15, fig. 8 is a cross-sectional view of the ball 15, and fig. 7 and 8 are referred to.

The ball 15 is in a spherical structure, the ball 15 is provided with a through hole 155 and a third through hole 152, wherein the through hole 155 is formed through the center of the ball, the third through hole 152 is formed in a staggered manner with the through hole 155, one end of the third through hole 152 can correspond to the first through hole of the first valve body 12, meanwhile, the other end of the third through hole 152 can correspond to the second through hole of the first valve body 12, so that the second cavity 127 and the outflow hole 121 can be communicated through the third through hole 152, the through hole 155 corresponds to the third through hole of the first valve body 12, the cross section shape of the through hole 155 is consistent with the cross section shape of the valve rod 18, so that the valve rod 18 is in transmission connection with the ball 15, namely, after the valve rod 18 sequentially passes through the first valve body 12 and the ball 15, the valve rod 18 can drive the ball 15 to rotate synchronously, and when the valve rod 18 drives the ball 15 to rotate relative to the first valve body 12, the two states are provided: in the first state, the first through hole and the second through hole of the first valve body 12 communicate with the third communication hole of the ball 15 at the same time, and at this time, the second chamber 127 communicates with the outflow port 121. In the second state, the first through hole of the first valve body 12 is offset from the third communication hole of the ball 15, and at this time, the second chamber 127 is disconnected from the outflow port 121.

Next, the specific structure of the valve core 13 will be described in detail, fig. 9 is a schematic structural view of the valve core 13, fig. 10 is a sectional view of the valve core 13, and fig. 9 and 10 are referred to.

The valve core 13 is provided with a return spring 14, one end of the return spring 14 is abutted against the valve core 13, the other end is abutted against the valve rod 18, and the return spring 14 extends along the axial direction of the valve core 13 so that the valve core 13 has a reset trend under the action of external force.

Specifically, the valve core 13 includes an adjusting portion 136 and an inserting portion 137 that are fixedly connected, the inserting portion 137 is located at one side of the adjusting portion 136 along the axial direction, an inserting groove 138 is formed in the inserting portion 137 along the axial direction, the return spring 14 is embedded in the inserting groove 138, the valve rod 18 is inserted in the inserting groove 138, and the valve rod 18 abuts against the return spring 14.

Optionally, the adjusting portion 136 has a circular truncated cone structure and includes a first conical surface 135, the first conical surface 135 is configured to cooperate with the second conical surface 115 of the shunt ring 112, the inserting portion 137 is located at a small end of the adjusting portion 136, the adjusting portion 136 includes a peripheral wall and a small end wall, and the second flow hole 134 is formed in the adjusting portion 136 and penetrates the peripheral wall and the small end wall, so that the first cavity 124 and the second cavity 127 can be communicated.

Optionally, the return spring 14 is a compression spring, one end of the compression spring is abutted against the bottom wall of the insertion groove 138, and the other end is abutted against the valve rod 18, so that the valve core 13 has a tendency of returning when moving along the axial direction of the valve seat 10 under the action of external force (impact force of fluid).

Again, the specific structure of the valve stem 18 will be described in detail, and fig. 11 is a schematic diagram of the structure of the valve stem 18, please refer to fig. 11.

The valve rod 18 is of an elongated rod-shaped structure, and the valve rod 18 comprises a first plug-in section 181 and a second plug-in section 182, wherein the first plug-in section 181 is positioned at the end part and is used for being in transmission connection with the valve core 13, the second plug-in section 182 is used for being in transmission connection with the ball 15, the first plug-in section 181 is matched with the plug-in groove 138 of the valve core 13, and the second plug-in section 182 is matched with the through hole 155 of the ball 15.

Optionally, the cross-sections of the first plug section 181, the second plug section 182, the plug slot 138 and the through hole 155 are non-circular, so that the valve stem 18 is in driving connection with the ball 15 and the valve core 13 at the same time. Non-circular here refers to other shapes excluding circular, such as: arc, rectangle, triangle, polygon, oblong or at least two combined regular shapes or irregular shapes, and the like, as long as the valve rod 18 is connected with the ball 15 and the valve core 13 at the same time, and the ball 15 and the valve core 13 are driven to rotate by the rotation of the valve rod 18.

The ball 15 rotates relative to the valve seat 10 only under the action of the valve rod 18, and the valve core 13 has two movement modes of rotation and movement, namely the valve core 13 rotates relative to the valve seat 10 under the action of the valve rod 18; the valve element 13 moves axially relative to the valve seat 10 by an external force and a return spring 14.

Finally, as shown in fig. 2, the stop valve 100 further includes a handle 19, a fixing hole is formed at a connection end of the handle 19, the fixing hole is fixedly connected with one end of the valve rod 18 far away from the valve core 13, and the valve rod 18 is rotated by rotating the handle 19, so as to drive the ball 15 and the valve core 13 to rotate.

The working principle of the stop valve 100 provided in this embodiment is as follows:

Referring to fig. 2, in the open state of the shut-off valve 100, the third through hole 152 of the ball 15 communicates with the outflow port 121 of the valve seat 10, the second through hole 134 of the valve element 13 communicates with the first through hole 116 of the valve seat 10, and the fluid in the first chamber 124 enters the second chamber 127 through the valve element 13 and then flows out of the outflow port 121 through the ball 15.

Fig. 12 is a sectional view of the second case of the open state of the shut-off valve, and refer to fig. 12.

When the pressure of the fluid is large, the fluid in the first chamber 124 impacts the valve core 13 so that the first tapered surface 135 of the valve core 13 is fitted with the second tapered surface 115 of the split ring 112, and only a part of the fluid sequentially flows into the second chamber 127 from the first flow hole 116 of the split ring 112 and the second flow hole 134 of the valve core 13, and then flows out of the outflow port 121 through the third flow hole 152 on the ball 15, thereby reducing the flow rate of the fluid.

With continued reference to fig. 2, when the pressure of the fluid is smaller, the fluid in the first cavity 124 impacts the valve core 13, and the return spring 14 is compressed, but the first tapered surface 135 of the valve core 13 is not adhered to the second tapered surface 115 of the split ring 112, so that a part of the fluid flows into the second cavity 127 through the first channel 113, another part of the fluid flows into the second cavity 127 through the second channel 114, and flows out of the outflow port 121 through the third through hole 152 on the ball 15 after being collected, thereby increasing the flow rate of the fluid.

In short, in a state where the shut-off valve 100 is opened, the flow rate of the fluid can be automatically adjusted by the magnitude of the fluid pressure, and the effect of stabilizing the flow rate is obtained.

Referring to fig. 3, when the handle 19 is pulled to drive the valve stem 18 to rotate, the third through hole 152 on the ball 15 and the first and second through holes on the valve seat 10 are dislocated, the second cavity 127 is not communicated with the outflow port 121, the second through hole 134 on the valve core 13 and the first through hole 116 on the split ring 112 are dislocated, and the first cavity 124 is not communicated with the second cavity 127, so that the two-stage locking and leakage preventing effects are achieved.

When the pressure of the fluid is high, the fluid in the first cavity 124 impacts the valve core 13, so that the first conical surface 135 of the valve core 13 is attached to the second conical surface 115 of the split ring 112, meanwhile, the first flow hole 116 of the split ring 112 is dislocated from the second flow hole 134 of the valve core 13, the first cavity 124 is not communicated with the second cavity 127, and the fluid cannot flow through.

When the pressure of the fluid is small, the fluid in the first cavity 124 impacts the valve core 13, the return spring 14 is compressed, but the first conical surface 135 of the valve core 13 does not fit with the second conical surface 115 of the split ring 112, and although the first flow hole 116 of the split ring 112 is dislocated with the second flow hole 134 of the valve core 13, there is still a possibility that a small amount of water flows from the first cavity 124 to the second cavity 127, because the pressure of the water flowing to the second cavity 127 is small, and the third flow hole 152 on the ball 15 and the first and second through holes on the valve seat 10 are dislocated, so that the fluid in the second cavity 127 does not flow out of the outflow port 121 through the ball 15.

The stop valve 100 provided in this embodiment has the following advantages: the valve is ingenious in design and simple in structure, the valve core 13 and the ball 15 are respectively matched with the valve seat 10, the valve rod 18 is rotated to drive the ball 15 and the valve core 13 to be communicated or disconnected with the valve seat 10, the purposes of secondary leakage prevention, pressure reduction and flow resistance are achieved, the purpose of automatically adjusting the fluid flow speed according to the fluid pressure according to the impact of the fluid on the valve core 13 and the reset trend of the return spring 14 is achieved, the purposes of pressure reduction and flow stabilization are achieved, the safety performance and the tightness of the stop valve 100 are improved, and the effects of 'no leakage and no mess in opening' are achieved.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (1)

1. The stop valve is characterized by comprising a valve core, a ball, a valve rod and a valve seat provided with an outflow opening, wherein the valve seat is provided with a circulation cavity communicated with the outflow opening, the ball and the valve core are arranged in the circulation cavity at intervals, and the valve core divides the circulation cavity into a first cavity and a second cavity;

the valve rod is connected with the ball and the valve core simultaneously, and can drive the ball and the valve core to rotate relative to the valve seat so as to enable the first cavity, the second cavity and the outflow port to be simultaneously communicated or disconnected;

The valve seat is provided with a first flow hole, the valve core is provided with a second flow hole, and when the valve core rotates relative to the valve seat, the second flow hole is communicated with or disconnected from the first flow hole;

the inner wall of the valve seat is provided with a flow dividing ring which divides the first cavity into a first channel and a second channel, and the first channel is communicated with the first flow hole;

A third channel communicated with the second channel is formed between the valve core and the shunt ring, and the valve core can move relative to the valve seat along the axial direction of the valve core under the action of external force so as to close the third channel;

The valve core is provided with a first conical surface, the flow dividing ring is provided with a second conical surface, the third channel is defined by the first conical surface and the second conical surface, and the small ends of the first conical surfaces face the balls;

The valve core is provided with a return spring, one end of the return spring is propped against the valve core, the other end of the return spring is propped against the valve rod, and the return spring extends along the axial direction of the valve core so that the valve core has a reset trend under the action of external force;

The valve core comprises an adjusting part and a plug part which are fixedly connected, the plug part is provided with a plug groove along the axial direction, the return spring is embedded in the plug groove, and the valve rod is inserted in the plug groove and is abutted with the return spring;

The adjusting part is of a truncated cone structure and is provided with a peripheral wall and a small end wall, and the second flow hole is formed in the adjusting part and penetrates the peripheral wall and the small end wall;

The valve seat comprises a first valve body and a second valve body which are fixedly connected, the outflow opening is formed in the first valve body, the ball is rotatably embedded in the first valve body, the valve core is movably arranged in the second valve body, and the valve rod penetrates through the first valve body and the ball and is in transmission connection with the valve core;

The ball is provided with a through hole and a third through hole, the valve rod penetrates through the through hole and is in transmission connection with the ball, and when the ball rotates, the second cavity, the third through hole and the outflow port are simultaneously communicated or disconnected;

The valve rod comprises a first plug-in section and a second plug-in section, the first plug-in section is positioned at the end part, a plug-in groove is formed in the valve core along the axial direction, the first plug-in section is in plug-in fit with the plug-in groove, the ball is provided with a through hole, and the second plug-in section is arranged in the through hole in a penetrating mode;

The cross sections of the first inserting section, the second inserting section, the inserting groove and the through hole are non-circular, so that the valve rod is in transmission connection with the ball and the valve core at the same time.