Three-way ball valve

Abstract

A first flow channel, a second flow channel, a third flow channel and a fourth flow channel which are communicated with a second cavity are arranged on the peripheral wall of a valve element at intervals in the first hour hand direction, a first branch flow channel, a second branch flow channel and a main flow channel, and the first flow channel, the second flow channel and the fourth flow channel are distributed in a Y shape and correspond to one another. And the included angle theta 1 between the axes of the first flow channel and the second flow channel is equal to the included angle theta 2 between the axes of the third flow channel and the fourth flow channel, so that the flow converging valve has the functions of converging, fully closing, only conveying one fluid and only conveying the other fluid at the same time. And in the process of switching from the state of only conveying one fluid to the state of only conveying the other fluid, the fluid passes through the full-closed state firstly, so that the mixed flow phenomenon cannot occur in the switching process.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a three-way ball valve. Background Art

[0002] The three-way ball valve can realize the confluence and diversion of fluids (especially liquids and / or gases, etc.) and is widely used in various industries. The three-way ball valve generally has a main channel and two branch channels, which can be used to achieve on-off control between the three channels.

[0003] A Chinese utility model patent with a Chinese patent publication number of "CN 202252123U" discloses a three-way ball valve, which has a groove on the spherical valve core, the arc of the groove extending on the spherical surface of the valve core is set to 180 degrees, the lateral width of the groove is set to be equal to the diameter of the main flow channel, and the area of ​​each radial section of the groove of the spherical valve core is equal to the cross-sectional area of ​​the main flow channel. Thus, the three-way ball valve can realize three different flow channel on-off control modes by rotating the valve core: (1) flow channel B and flow channel A are connected, while flow channel C is closed; (2) flow channel B and flow channel C are connected to flow channel A at the same time; and (3) flow channel C is connected to flow channel A, while flow channel B is closed.

[0004] Although the three-way ball valve can basically meet most of the usage scenarios, it still has some shortcomings. For example: 1. The three-way ball valve does not have the function of closing three channels at the same time; 2. When the valve core is turned clockwise to switch the three-way ball valve from the state where channels B and A are connected and channel C is closed to the state where channels C and A are connected and channel B is closed, channels B and C will be mixed. Utility Model Content

[0005] The main purpose of the utility model is to provide a three-way valve, aiming to improve the use function of the three-way valve and prevent the mixed flow phenomenon when switching a single flow direction.

[0006] To achieve the above-mentioned purpose, the utility model proposes a three-way ball valve, including a valve body, a valve core and a valve stem for driving the valve core to rotate, the valve body defines a first chamber inside, the peripheral wall of the valve body is provided with a first branch channel, a second branch channel and a main channel connected to the first chamber at intervals along a first clockwise direction, the valve core is arranged in the first chamber, the valve core defines a second chamber inside, the peripheral wall of the valve core is provided with a first channel, a second channel, a third channel and a fourth channel connected to the second chamber at intervals along a first clockwise direction, wherein the first branch channel, the second branch channel and the main channel and the first channel, the second channel and the fourth channel are all distributed in a Y shape, and correspondingly, the axis angle θ1 between the first channel and the second channel is equal to the axis angle θ2 between the third channel and the fourth channel. equal, when the first branch channel and the second branch channel are connected with the first channel and the second channel respectively, the fourth channel is connected with the main channel; when the valve core rotates along the first clockwise direction until the first channel is connected with the second branch channel, the third channel is connected with the main channel, and the first branch channel is closed by the surrounding wall of the valve core; when the valve core rotates along the first clockwise direction until the first channel and the second channel are between the positions corresponding to the second branch channel and the main channel, the third channel and the fourth channel are between the positions corresponding to the main channel and the first channel, and the first branch channel, the second branch channel and the main channel are closed by the surrounding wall of the valve core; and when the valve core rotates along the first clockwise direction until the fourth channel is connected with the first branch channel, the second channel is connected with the main channel, and the second branch channel is closed by the surrounding wall of the valve core.

[0007] The technical solution of the utility model is to arrange the first flow channel, the second flow channel, the third flow channel and the fourth flow channel connected to the second chamber at intervals along the first clockwise direction on the peripheral wall of the valve core, wherein the first branch flow channel, the second branch flow channel and the main flow channel as well as the first flow channel, the second flow channel and the fourth flow channel are all distributed in a Y shape and correspond to each other, and the axis angle θ1 of the first flow channel and the second flow channel is equal to the axis angle θ2 of the third flow channel and the fourth flow channel. Through this arrangement, when the first branch flow channel and the second branch flow channel are connected with the first flow channel and the second flow channel respectively, the fourth flow channel is connected with the main flow channel. At this time, the fluids respectively transported by the first branch flow channel and the second branch flow channel flow into the second chamber through the first flow channel and the second flow channel respectively, and flow to the main flow channel through the fourth flow channel after mixing, thereby realizing the confluence control of the two fluids; when the valve core rotates along the first clockwise direction until the first flow channel is connected with the second branch flow channel, the third flow channel is connected with the main flow channel, and the first branch flow channel is closed by the peripheral wall of the valve core. At this time, only the second branch flow channel is connected. The transported fluid enters the second chamber through the first flow channel, and finally flows to the main flow channel through the third flow channel, thereby realizing the transport of one fluid; when the valve core rotates along the first clockwise direction until the first flow channel and the second flow channel are between the positions corresponding to the second branch flow channel and the main flow channel, the third flow channel and the fourth flow channel are between the positions corresponding to the main flow channel and the first flow channel, and the first branch flow channel, the second branch flow channel and the main flow channel are closed by the surrounding wall of the valve core. At this time, the three-way valve is in a fully closed state; and when the valve core rotates along the first clockwise direction until the fourth flow channel is connected with the first branch flow channel, the second flow channel is connected with the main flow channel, and the second branch flow channel is closed by the surrounding wall of the valve core. At this time, only the fluid transported by the first branch flow channel enters the second chamber through the fourth flow channel, and finally flows to the main flow channel through the second flow channel, thereby realizing the transport of another fluid, and in the process of switching from the state of only transporting one fluid to the state of only transporting another fluid, it will first pass through the fully closed state, so that no mixed flow phenomenon will occur during the switching process. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a three-dimensional schematic diagram of the utility model from one angle;

[0009] Figure 2 This is a schematic diagram of the utility model

[0010] Figure 3 It is a cross-sectional view of the utility model in the confluence state;

[0011] Figure 4 This is a cross-sectional view of the utility model conveying only one fluid state;

[0012] Figure 5 It is a cross-sectional view of the fully closed state;

[0013] Figure 6 It is a cross-sectional view of the utility model in a state of conveying only another fluid;

[0014] Figure 7 It is a three-dimensional schematic diagram of the valve core 2. DETAILED DESCRIPTION

[0015] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0017] In addition, if there are descriptions involving "first" or "second" etc. in the embodiments of the utility model, the descriptions of "first" or "second" etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0018] The utility model provides a three-way ball valve.

[0019] In the embodiment of the present utility model, Figures 1 to 7 As shown, the three-way ball valve comprises a valve body 1, a valve core 2 and a valve stem 3 for driving the valve core 2 to rotate.

[0020] The valve body 1 defines a first chamber 10 inside, and the peripheral wall of the valve body 1 is provided with a first branch channel 11, a second branch channel 12 and a main channel 13 connected to the first chamber 10 at intervals along the first clockwise direction, and the valve core 2 is provided in the first chamber 10. The valve core 2 defines a second chamber 20 inside, and the peripheral wall of the valve core 2 is provided with a first channel 21, a second channel 22, a third channel 23 and a fourth channel 24 connected to the second chamber 20 at intervals along the first clockwise direction. The first branch channel 11, the second branch channel 12 and the main channel 13, as well as the first channel 21, the second channel 22 and the fourth channel 24 are all distributed in a Y shape and correspond to each other. The axis angle θ1 of the first flow channel 21 and the second flow channel 22 is equal to the axis angle θ2 of the third flow channel 23 and the fourth flow channel 24. When the first branch flow channel 11 and the second branch flow channel 12 are connected to the first flow channel 21 and the second flow channel 22 respectively (at this time, the first branch flow channel 11 and the second branch flow channel 12 are opposite to the first flow channel 21 and the second flow channel 22 respectively), the fourth flow channel 24 is connected to the main flow channel 13 (see Figure 3 ); when the valve core 2 rotates in the first clockwise direction until the first flow channel 21 is connected to the second branch flow channel 12, the third flow channel 23 is connected to the main flow channel 13, and the first branch flow channel 11 is closed by the peripheral wall of the valve core 2 (see Figure 4 ); when the valve core 2 rotates along the first clockwise direction until the first flow channel 21 and the second flow channel 22 are between the positions corresponding to the second branch flow channel 12 and the main flow channel 13, the third flow channel 23 and the fourth flow channel 24 are between the positions corresponding to the main flow channel 13 and the first flow channel 21, and the first branch flow channel 11, the second branch flow channel 12 and the main flow channel 13 are closed by the peripheral wall of the valve core 2 (at this time, the three-way valve is in a fully closed state, see Figure 5 ); and when the valve core 2 rotates along the first clockwise direction until the fourth flow channel 24 is connected to the first branch flow channel 11, the second flow channel 22 is connected to the main flow channel 13, and the second branch flow channel 12 is closed by the peripheral wall of the valve core 2 (see Figure 6 ).

[0021] In the technical solution of the utility model, a first flow channel 21, a second flow channel 22, a third flow channel 23 and a fourth flow channel 24 connected to the second chamber 20 are arranged on the peripheral wall of the valve core 2 at intervals along the first clockwise direction, wherein the first branch flow channel 11, the second branch flow channel 12 and the main flow channel 13 as well as the first flow channel 21, the second flow channel 22 and the fourth flow channel 24 are all distributed in a Y shape and correspond to each other, and the axial angle θ1 between the first flow channel 21 and the second flow channel 22 is equal to the axial angle θ2 between the third flow channel 23 and the fourth flow channel 24. Through this arrangement, when the first branch channel 11 and the second branch channel 12 are connected to the first channel 21 and the second channel 22 respectively, the fourth channel 24 is connected to the main channel 13. At this time, the fluids transported by the first branch channel 11 and the second branch channel 12 flow into the second chamber 20 through the first channel 21 and the second channel 22 respectively, and flow to the main channel 13 through the fourth channel 24 after mixing, thereby realizing the confluence control of the two fluids; when the valve core 2 rotates along the first clockwise direction until the first channel 21 is connected to the second branch channel 12, the third channel 23 is connected to the main channel 13, and the first branch channel 11 is closed by the peripheral wall of the valve core 2. At this time, only the fluid transported by the second branch channel 12 enters the second chamber 20 through the first channel 21, and finally flows to the main channel 13 through the third channel 23, thereby realizing a fluid transport operation; when the valve core 2 rotates along the first clockwise direction until the first channel 21 and the second channel are connected When 22 is between the positions corresponding to the second branch channel 12 and the main channel 13, the third channel 23 and the fourth channel 24 are between the positions corresponding to the main channel 13 and the first channel 21, the first branch channel 11, the second branch channel 12 and the main channel 13 are closed by the peripheral wall of the valve core 2, and at this time, the three-way valve is in a fully closed state; and when the valve core 2 rotates along the first clockwise direction until its fourth channel 24 is connected to the first branch channel 11, the second channel 22 is connected to the main channel 13, and the second branch channel 12 is closed by the peripheral wall of the valve core 2, at this time, only the fluid transported by the first branch channel 11 enters the second chamber 20 through the fourth channel 24, and finally flows to the main channel 13 through the second channel 22, realizing the transport of another fluid, and in the process of switching from the state of transporting only one fluid to the state of transporting only another fluid, it will first pass through the fully closed state, so that no mixed flow phenomenon will occur during the switching process.

[0022] It can be understood that the above description is only an introduction to the principle of taking the first branch channel 11 and the second branch channel 12 as the fluid input end, and the main channel 13 as the fluid output end. If the main channel 13 is used as the fluid input end, and the first branch channel 11 and the second branch channel 12 are connected, the three-way valve can form different working states. It will not be repeated here. In addition, when the first branch channel 11, the second branch channel 12 and the main channel 13 are distributed in a Y shape, the axes of the first branch channel 11, the second branch channel 12 and the main channel 13 intersect to form a Y shape. And the intersection point coincides with the rotation center of the valve core 2.

[0023] It should be noted that the first clockwise direction may be a clockwise direction or a counterclockwise direction. Figure 3-6 The direction is clockwise. The two fluids can be both liquids or gases, or one fluid can be liquid and the other fluid can be gas. The specific direction can be determined according to the transportation requirements.

[0024] When the valve core 2 rotates along the first clockwise direction until the first flow channel 21 and the second flow channel 22 are between the positions corresponding to the second branch flow channel 12 and the main flow channel 13, and the third flow channel 23 and the fourth flow channel 24 are between the positions corresponding to the main flow channel 13 and the first flow channel 21, the first branch flow channel 11, the second branch flow channel 12 and the main flow channel 13 are closed by the peripheral wall of the valve core 2, thereby making the three-way valve in a fully closed state. In some embodiments of the utility model, the axis angle α between the second flow channel 22 and the third flow channel 23 and the axis angle β between the fourth flow channel 24 and the first flow channel 21 are both approximately or at least twice the axis angle θ1 between the first flow channel 21 and the second flow channel 22 and the axis angle θ2 between the third flow channel 23 and the fourth flow channel 24.

[0025] In some preferred embodiments, the axial angle α between the second flow channel 22 and the third flow channel 23 and the axial angle β between the fourth flow channel 24 and the first flow channel 21 are approximately or at least 2-6 times the axial angle θ1 between the first flow channel 21 and the second flow channel 22 and the axial angle θ2 between the third flow channel 23 and the fourth flow channel 24.

[0026] In some more preferred embodiments, the axial angle α between the second flow channel 22 and the third flow channel 23 is approximately or at least twice the axial angle θ1 between the first flow channel 21 and the second flow channel 22 and the axial angle θ2 between the third flow channel 23 and the fourth flow channel 24, and the axial angle β between the fourth flow channel 24 and the first flow channel 21 is approximately or at least three times the axial angle θ1 between the first flow channel 21 and the second flow channel 22 and the axial angle θ2 between the third flow channel 23 and the fourth flow channel 24.

[0027] As a preferred embodiment, the axial angle α between the second flow channel 22 and the third flow channel 23 is twice the axial angle θ1 between the first flow channel 21 and the second flow channel 22, and the axial angle β between the fourth flow channel 24 and the first flow channel 21 is three times the axial angle θ1 between the first flow channel 21 and the second flow channel 22.

[0028] In some embodiments of the present invention, the valve body 1 includes a cover 1B and a shell 1A with an open top, and the cover 1B is installed on the top of the shell 1A to close the top of the shell 1A. Specifically, the cover 1B and the shell 1A can be detachably connected by a snap-fit ​​structure or screws 4, such as Figure 1 The case of a detachable connection via screws 4 is shown.

[0029] In the embodiment of the utility model, a through hole 101 is formed in the middle of the cover body 1B, the lower part of the valve stem 3 is connected to the valve core 2, and the upper part extends out of the valve body 1 through the hole 101. A first sealing structure 31 is provided at the junction of the valve stem 3 and the through hole 101 to prevent the fluid from flowing out of the valve body 1 through the hole 101. Specifically, an annular groove 32 is formed on the peripheral wall of the valve stem 3 corresponding to the position of the through hole 101, and the first sealing structure 31 is a first rubber ring, which is sleeved in the annular groove 32 and seals against the peripheral wall of the through hole 101 to achieve the purpose of sealing.

[0030] In some embodiments, a non-circular driving portion 33 is formed at the lower portion of the valve stem 3, and a groove 25 adapted to the driving portion 33 is formed on the top surface of the valve core 2, and the driving portion 33 extends into the groove 25. When the valve stem 3 rotates, the valve core 2 can be driven to rotate by its driving portion 33. Specifically, a step surface 34 is provided at a position of the valve stem 3 below the through hole 101, and the step surface 34 abuts against or contacts the bottom surface of the cover body 1B to prevent the valve stem 3 from sliding out of the valve body 1.

[0031] In some embodiments, the valve core 2 can be pivotally disposed in the first chamber 10 and can rotate with the valve stem 3. Specifically, a pivot groove 26 is formed on the bottom surface of the valve core 2, and a pivot (not shown) extending into the pivot groove 26 is provided at the inner bottom of the valve body 1, so that the valve core 2 can rotate around the axis of the pivot. Of course, it is also possible to provide a pivot groove at the inner bottom of the valve body 1, and to provide a pivot that can extend into the pivot groove at the bottom surface of the valve core 2. Furthermore, in order to improve the smoothness of the rotation of the valve core 2, the pivot can also be installed in the pivot groove through a bearing (not shown).

[0032] It can be understood that the first branch channel 11, the second branch channel 12 and the main channel 13 are respectively provided with a second sealing structure 5 that cooperates with the valve core 2 to ensure the closure of the first branch channel 11, the second branch channel 12 and the main channel 13 or the communication with the corresponding channels under different working conditions. The second sealing structure 5 generally adopts a sealing rubber ring. There are many implementation methods in the current technology for how to set it, which will not be repeated here.

[0033] Furthermore, it also includes pipe joints 17, 18, 19 respectively installed from the outside on the first branch channel 11, the second branch channel 12 and the main channel 13 to connect external pipelines. Specifically, the pipe joints 17, 18, 19 can be screwed into the corresponding first branch channel 11, the second branch channel 12 and the main channel 13 by threaded matching, and the joints are sealed (for example, by waterproof tape or sealing ring). The specific sealing treatment and setting belongs to the existing technology and will not be repeated here.

[0034] In a preferred embodiment, the second sealing structure 5 is installed at the end of the pipe joints 17, 18, 19, and can be sealed against the peripheral wall of the valve core 2. Specifically, the ends of the pipe joints 17, 18, 19 extend into the first chamber 10, and the end faces of the pipe joints 17, 18, 19 are formed with concave steps (not shown), and the second sealing structure 5 is partially embedded in the steps in the axial direction.

[0035] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A three-way ball valve, comprising a valve body, a valve core and a valve stem for driving the valve core to rotate, wherein a first chamber is defined inside the valve body, a first branch channel, a second branch channel and a main channel connected to the first chamber are arranged at intervals along a first clockwise direction on the peripheral wall of the valve body, the valve core is arranged in the first chamber, a second chamber is defined inside the valve core, and the characteristics are: The circumferential wall of the valve core is provided with the first flow channel, the second flow channel, the third flow channel and the fourth flow channel connected to the second chamber at intervals along the first clockwise direction, wherein the first branch flow channel, the second branch flow channel and the main flow channel as well as the first flow channel, the second flow channel and the fourth flow channel are all distributed in a Y shape, and correspondingly, the axis angle θ1 of the first flow channel and the second flow channel is equal to the axis angle θ2 of the third flow channel and the fourth flow channel, when the first branch flow channel and the second branch flow channel are connected to the first flow channel and the second flow channel respectively, the fourth flow channel is connected to the main flow channel; when the valve core is rotated along the first clockwise direction to the first flow channel, the valve core is connected to the second flow channel, and the valve core is connected to the first flow channel. When the first flow channel is connected to the second branch flow channel, the third flow channel is connected to the main flow channel, and the first branch flow channel is closed by the peripheral wall of the valve core; when the valve core rotates along the first clockwise direction until the first flow channel and the second flow channel are between the positions corresponding to the second branch flow channel and the main flow channel, the third flow channel and the fourth flow channel are between the positions corresponding to the main flow channel and the first flow channel, and the first branch flow channel, the second branch flow channel and the main flow channel are closed by the peripheral wall of the valve core; and when the valve core rotates along the first clockwise direction until the fourth flow channel is connected to the first branch flow channel, the second flow channel is connected to the main flow channel, and the second branch flow channel is closed by the peripheral wall of the valve core.

2. The three-way ball valve according to claim 1, characterized in that: The axis angle α between the second flow channel and the third flow channel and the axis angle β between the fourth flow channel and the first flow channel are both at least twice the axis angle θ1 between the first flow channel and the second flow channel.

3. The three-way ball valve according to claim 2, characterized in that: The axis angle α between the second flow channel and the third flow channel and the axis angle β between the fourth flow channel and the first flow channel are both at least 2-6 times the axis angle θ1 between the first flow channel and the second flow channel.

4. The three-way ball valve according to claim 3, characterized in that: The axis angle α between the second flow channel and the third flow channel is at least twice the axis angle θ1 between the first flow channel and the second flow channel, and the axis angle β between the fourth flow channel and the first flow channel is at least three times the axis angle θ1 between the first flow channel and the second flow channel.

5. The three-way ball valve according to claim 4, characterized in that: The axis angle α between the second flow channel and the third flow channel is twice the axis angle θ1 between the first flow channel and the second flow channel, and the axis angle β between the fourth flow channel and the first flow channel is three times the axis angle θ1 between the first flow channel and the second flow channel.

6. The three-way ball valve according to any one of claims 1 to 5, characterized in that: The valve body includes a cover body and a shell with an open top. The cover body is installed on the top of the shell and closes the top of the shell. A through hole is formed in the middle of the cover body. The lower part of the valve stem is connected to the valve core, and the upper part extends out of the valve body through the hole. A first sealing structure is provided at the junction of the valve stem and the through hole.

7. The three-way ball valve according to claim 6, characterized in that: A non-circular driving part is formed at the lower part of the valve stem, a groove suitable for the driving part is formed on the top surface of the valve core, the driving part extends into the groove, and a step surface is provided at the position of the valve stem below the through hole, which abuts against the bottom surface of the cover body.

8. The three-way ball valve according to any one of claims 1 to 5, characterized in that: A pivot groove is formed on the bottom surface of the valve core, and a pivot extending into the pivot groove is provided at the inner bottom of the valve body, so that the valve core can rotate around the axis of the pivot.

9. The three-way ball valve according to any one of claims 1 to 5, characterized in that: The first branch flow channel, the second branch flow channel and the main flow channel are respectively provided with a second sealing structure matched with the valve core.

10. The three-way ball valve according to claim 9, characterized in that: It also includes pipe joints installed on the first branch channel, the second branch channel and the main channel from the outside, respectively. The end of the pipe joint extends into the first chamber, the end face of the pipe joint is formed with a concave step, and the second sealing structure is partially embedded in the step axially.

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