Three-way ball valve

Abstract

The utility model provides a three-way ball valve, and belongs to the technical field of valve manufacturing. The problem that an existing three-way ball valve is high in cost is solved. The three-way ball valve comprises a valve body, a valve rod and a three-way valve ball, the valve body is provided with a first connecting port and a second connecting port which are integrally formed, the included angle between the axis of the first connecting port and the axis of the second connecting port is 90 degrees, the side portion, opposite to the first connecting port, of the valve body is in threaded connection with a valve bonnet which is coaxially arranged with the first connecting port, and the first connecting port, the second connecting port and the valve bonnet are all communicated to the three-way valve ball. A first sealing ring sealed on the three-way valve ball is arranged at the inner end of the first connecting port, a second sealing ring sealed on the three-way valve ball is arranged at the inner end of the second connecting port, a third sealing ring sealed on the three-way valve ball is arranged at the inner end of the valve bonnet, and the side portion, opposite to the second connecting port, of the valve body is provided with a valve seat which protrudes outwards and is coaxial with the second connecting port. A fourth sealing ring sealed on the three-way valve ball is arranged in the valve seat. The utility model has the advantages of simple structure, low cost, good sealing performance and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve manufacturing, relates to a ball valve, and particularly relates to a three-way ball valve. Background Art

[0002] The three-way ball valve is mainly applicable to the switching, commutation, and shunting of gas or liquid media, and is widely used in aspects such as petroleum, chemical industry, aviation, and plumbing.

[0003] For example, a Chinese patent document discloses a three-way ball valve [Application No.: 202223015060.X; Authorization Publication No.: CN218625492U], which includes a valve body, a valve stem, and a valve ball. Among them, two water outlet channels and one water inlet channel that communicate with each other are opened in the valve body, and a valve cavity is formed at the intersection of the three channels in the valve body. The valve ball is arranged in the valve cavity, and a channel is opened in the valve ball. The upper end of the valve stem is located outside the valve body, and its lower end penetrates into the valve body and is connected to the valve ball. A first elastic member is arranged between the lower end of the valve stem and the inner wall of the valve body. During operation, the valve ball pushes the valve stem along the fluid direction under the action of the fluid pressure, so that it abuts against the first elastic member, avoiding contact friction between the valve stem and the inner wall of the valve body.

[0004] Through the setting of the first elastic member, the above three-way ball valve can avoid the situation that the valve stem cannot drive the valve ball due to the too large torque generated by long-term dynamic friction. However, its valve body is assembled by two valve covers, the structure is not simple enough, the manufacturing cost is high, and each connection between the valve cover and the valve body is a leakage point, increasing the leakage probability. Moreover, the valve ball is only provided with gaskets sealed to the valve ball at the channels, and the three gaskets are not evenly stressed, resulting in poor sealing effect and less than ideal service life. Summary of the Invention

[0005] The purpose of the utility model is to provide a three-way ball valve with a simple structure and good sealing performance for the above problems existing in the prior art.

[0006] The object of the present utility model can be achieved by the following technical solutions: A three-way ball valve, comprising a valve body, a valve stem and a three-way valve ball. The three-way valve ball is located inside the valve body. The inner end of the valve stem is connected to the three-way valve ball, and the outer end of the valve stem extends out of the valve body. It is characterized in that the valve body has integrally formed connection port one and connection port two, and the included angle between the axes of the connection port one and the connection port two is 90°. A valve cap coaxially arranged with the connection port one is threadedly connected to the side of the valve body facing away from the connection port one. The connection port one, the connection port two and the valve cap are all communicated to the three-way valve ball. A sealing ring one for sealing the three-way valve ball is provided at the inner end of the connection port one. A sealing ring two for sealing the three-way valve ball is provided at the inner end of the connection port two. A sealing ring three for sealing the three-way valve ball is provided at the inner end of the valve cap. The side of the valve body facing away from the connection port two has an outwardly convex valve seat coaxially arranged with the connection port two, and a sealing ring four for sealing the three-way valve ball is provided inside the valve seat.

[0007] In the above-mentioned three-way ball valve, the inner end inner wall of the connection port one has a radially inwardly convex shoulder one. The sealing ring one abuts against the shoulder one and the outer ring of the sealing ring one abuts against the inner wall of the valve body. The inner end inner wall of the connection port two has a radially inwardly convex shoulder two. The sealing ring two abuts against the shoulder two and the outer ring of the sealing ring two abuts against the inner wall of the valve body. The inner end inner wall of the valve cap has a radially inwardly convex shoulder three. The sealing ring three abuts against the shoulder three and the outer ring of the sealing ring three abuts against the inner wall of the valve cap. The outer wall of the valve cap has a radially outwardly convex shoulder for abutting against the valve body. The sealing ring four abuts against the inner end face and the inner wall of the valve seat.

[0008] In the above-mentioned three-way ball valve, the inner wall of the valve body through which the valve stem passes has a step. The valve stem has a radially outwardly convex ring abutting against the step, and at least two O-rings for sealing the inner wall of the valve body are embedded in the valve stem.

[0009] In the above-mentioned three-way ball valve, the outer end of the valve stem has an axially extended connection section. The outer diameter of the connection section is smaller than the outer diameter of the valve stem and the connection section passes through a handle. The handle is circumferentially fixed to the connection section. A nut for pressing the handle against the valve stem is threadedly connected to the connection section. The valve body has an integrally formed limit block at the top on the side of the valve seat. The limit block has a limit part one and a limit part two located on both sides of the valve stem. The end faces of the limit part one and the limit part two are flush. The handle has a downwardly folded abutting part. When the abutting part abuts against the limit part one, the three-way valve ball seals the valve cap and makes the connection port one communicate with the connection port two. When the abutting part abuts against the limit part two, the three-way valve ball seals the connection port one and makes the connection port two communicate with the valve cap.

[0010] In the above three-way ball valve, the inner walls of the first connection port, the second connection port, and the valve cap all have internal threads.

[0011] Compared with the prior art, the structure of this three-way ball valve is simple, easy to manufacture, reduces the manufacturing cost, and also reduces the leakage points and the leakage probability. In addition, each sealing ring is evenly stressed, has good sealing performance, and a long service life. Description of the Drawings

[0012] Figure 1 is the three-dimensional structure of this three-way ball valve Figure 1 。

[0013] Figure 2 is the three-dimensional structure of this three-way ball valve Figure 2 。

[0014] Figure 3 is the structural cross-sectional view of this three-way ball valve.

[0015] Figure 4 is Figure 3 the structural cross-sectional view of the A-A section in

[0016] In the figure, 1. valve body; 11. first connection port; 111. first shoulder; 12. second connection port; 121. second shoulder; 13. valve seat; 14. step; 15. limit block; 151. first limit part; 152. second limit part; 2. valve stem; 21. convex ring; 22. connection section; 3. three-way valve ball; 4. valve cap; 41. third shoulder; 42. convex shoulder; 5. first sealing ring; 6. second sealing ring; 7. third sealing ring; 8. fourth sealing ring; 9. O-ring; 10. nut. Detailed Embodiments

[0017] The following are specific embodiments of the present invention and in combination with the drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0018] Such as Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown in the figure, this three-way ball valve includes a valve body 1, a valve stem 2, and a three-way valve ball 3. The three-way valve ball 3 is located inside the valve body 1. The inner end of the valve stem 2 is connected to the three-way valve ball 3, and the outer end of the valve stem 2 extends out of the valve body 1. The valve body 1 has an integrally formed connection port one 11 and connection port two 12. The included angle between the axes of the connection port one 11 and the connection port two 12 is 90°. A valve cap 4 coaxially arranged with the connection port one 11 is threadedly connected to the side of the valve body 1 facing away from the connection port one 11. The connection port one 11, the connection port two 12, and the valve cap 4 are all connected to the three-way valve ball 3. A first sealing ring 5 for sealing the three-way valve ball 3 is provided at the inner end of the connection port one 11. A second sealing ring 6 for sealing the three-way valve ball 3 is provided at the inner end of the connection port two 12. A third sealing ring 7 for sealing the three-way valve ball 3 is provided at the inner end of the valve cap 4. The side of the valve body 1 facing away from the connection port two 12 has an outwardly convex valve seat 13 coaxially arranged with the connection port two 12. A fourth sealing ring 8 for sealing the three-way valve ball 3 is provided inside the valve seat 13.

[0019] This three-way ball valve integrates the connection port one 11 and the connection port two 12 on the valve body 1, and there is only one valve cap 4. It has a simple structure, is convenient to manufacture, reduces the manufacturing cost, and reduces the leakage points and the leakage probability. In addition, the first sealing ring 5, the second sealing ring 6, the third sealing ring 7, and the fourth sealing ring 8 seal the three-way valve ball 3. Each sealing ring is evenly stressed, has good sealing performance, and a long service life.

[0020] Specifically, the inner end inner wall of the connection port one 11 has a radially inwardly convex shoulder one 111. The first sealing ring 5 abuts against the shoulder one 111 and the outer ring of the first sealing ring 5 abuts against the inner wall of the valve body 1. The inner end inner wall of the connection port two 12 has a radially inwardly convex shoulder two 121. The second sealing ring 6 abuts against the shoulder two 121 and the outer ring of the second sealing ring 6 abuts against the inner wall of the valve body 1. The inner end inner wall of the valve cap 4 has a radially inwardly convex shoulder three 41. The third sealing ring 7 abuts against the shoulder three 41 and the outer ring of the third sealing ring 7 abuts against the inner wall of the valve cap 4. The outer wall of the valve cap 4 has a radially outwardly convex shoulder 42 for abutting against the valve body 1. The fourth sealing ring 8 abuts against the inner end face and the inner wall of the valve seat 13. Such a structure is simple. During assembly, first place the first sealing ring 5, the second sealing ring 6, and the third sealing ring 7 in their corresponding positions, then insert the valve stem 2 into the valve body 1 from the side of the valve body 1 where the valve cap 4 is threadedly connected, and then extend the outer end of the valve stem 2 out of the valve body 1. Next, insert the three-way valve core into the valve body 1 from the side of the valve body 1 where the valve cap 4 is threadedly connected. Then threadedly connect the valve cap 4 equipped with the fourth sealing ring 8 to the valve body 1 until the shoulder 42 abuts against the valve body 1 to limit the valve cap 4, avoiding excessive compression of each sealing ring. The first sealing ring 5, the second sealing ring 6, the third sealing ring 7, and the fourth sealing ring 8 are evenly stressed and have good sealing performance.

[0021] The inner wall of the valve body 1 through which the valve stem 2 passes has a step 14. The valve stem 2 has a radially outwardly protruding convex ring 21 that abuts against the step 14. Two O-rings 9 that are sealed to the inner wall of the valve body 1 are embedded in the valve stem 2. The arrangement of the convex ring 21 and the step 14 axially limits the valve stem 2 to prevent the valve stem 2 from detaching from the valve body 1. The two O-rings 9 play a multiple sealing role to ensure the sealing performance between the valve stem 2 and the valve body 1.

[0022] The outer end of the valve stem 2 has an axially extending connecting section 22. The outer diameter of the connecting section 22 is smaller than that of the valve stem 2, and the connecting section 22 passes through a handle. The handle is circumferentially fixed to the connecting section 22. A nut 10 that presses the handle against the valve stem 2 is threadedly connected to the connecting section 22. At the top of the valve body 1 on the side of the valve seat 13, there is an integrally formed limit block 15. The limit block 15 has a first limit portion 151 and a second limit portion 152 located on both sides of the valve stem 2. The end faces of the first limit portion 151 and the second limit portion 152 are flush. The handle has a downwardly folded abutting portion. When the abutting portion abuts against the first limit portion 151, the three-way valve ball 3 blocks the valve cap 4 and makes the first connection port 11 communicate with the second connection port 12. When the abutting portion abuts against the second limit portion 152, the three-way valve ball 3 blocks the first connection port 11 and makes the second connection port 12 communicate with the valve cap 4.

[0023] During use, rotate the handle to drive the valve stem 2 and the three-way valve ball 3 to rotate. When the abutting portion abuts against the first limit portion 151, the first connection port 11 communicates with the second connection port 12, and the valve cap 4 is blocked by the three-way valve ball 3. When the handle rotates 180° and the abutting portion abuts against the second limit portion 152, the second connection port 12 communicates with the valve cap 4, and the first connection port 11 is blocked by the three-way valve ball 3. In this way, the operation of the two-way channel is realized. The limit block 15 is integrally formed with the valve body 1, with a compact and stable structure and convenient manufacturing.

[0024] In this embodiment, the inner walls of the first connection port 11, the second connection port 12, and the valve cap 4 all have internal threads. This facilitates the connection of pipelines and has good practicability.

[0025] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A three-way ball valve, comprising a valve body (1), a valve stem (2) and a three-way valve ball (3). The three-way valve ball (3) is located inside the valve body (1). The inner end of the valve stem (2) is connected to the three-way valve ball (3), and the outer end of the valve stem (2) extends out of the valve body (1). It is characterized in that, The described valve body (1) has integrally formed connecting port one (11) and connecting port two (12), and the included angle between the axes of the connecting port one (11) and the connecting port two (12) is 90°. A valve cap (4) coaxially arranged with the connecting port one (11) is threadedly connected to the side of the valve body (1) facing away from the connecting port one (11). The connecting port one (11), the connecting port two (12), and the valve cap (4) are all communicated with the three-way valve ball (3). A first sealing ring (5) sealed to the three-way valve ball (3) is provided at the inner end of the connecting port one (11). A second sealing ring (6) sealed to the three-way valve ball (3) is provided at the inner end of the connecting port two (12). A third sealing ring (7) sealed to the three-way valve ball (3) is provided at the inner end of the valve cap (4). The side of the valve body (1) facing away from the connecting port two (12) has an outwardly convex valve seat (13) coaxially arranged with the connecting port two (12), and a fourth sealing ring (8) sealed to the three-way valve ball (3) is provided inside the valve seat (13).

2. The three-way ball valve according to claim 1, characterized in that, The inner end inner wall of the connecting port one (11) has a radially inwardly convex shoulder one (111). The first sealing ring (5) abuts against the shoulder one (111) and the outer ring of the first sealing ring (5) abuts against the inner wall of the valve body (1). The inner end inner wall of the connecting port two (12) has a radially inwardly convex shoulder two (121). The second sealing ring (6) abuts against the shoulder two (121) and the outer ring of the second sealing ring (6) abuts against the inner wall of the valve body (1). The inner end inner wall of the valve cap (4) has a radially inwardly convex shoulder three (41). The third sealing ring (7) abuts against the shoulder three (41) and the outer ring of the third sealing ring (7) abuts against the inner wall of the valve cap (4). The outer wall of the valve cap (4) has a radially outwardly convex shoulder (42) for abutting against the valve body (1). The fourth sealing ring (8) abuts against the inner end face and the inner wall of the valve seat (13).

3. The three-way ball valve according to claim 2, characterized in that, The inner wall of the valve body (1) through which the valve stem (2) passes has a step (14). The valve stem (2) has a radially outwardly convex convex ring (21) that abuts against the step (14). At least two O-rings (9) sealed to the inner wall of the valve body (1) are embedded in the valve stem (2).

4. The three-way ball valve according to claim 3, characterized in that, The outer end of the described valve stem (2) has an axially extended connecting section (22). The outer diameter of the connecting section (22) is smaller than that of the valve stem (2), and the connecting section (22) passes through a handle. The handle is circumferentially fixed to the connecting section (22). A nut (10) that presses the handle against the valve stem (2) is threadedly connected to the connecting section (22). The valve body (1) has an integrally formed limiting block (15) at the top on the side of the valve seat (13). The limiting block (15) has a first limiting portion (151) and a second limiting portion (152) located on both sides of the valve stem (2). The end faces of the first limiting portion (151) and the second limiting portion (152) are flush. The handle has a downwardly folded abutting portion. When the abutting portion abuts against the first limiting portion (151), the three-way valve ball (3) blocks the valve cap (4) and makes the first connection port (11) communicate with the second connection port (12). When the abutting portion abuts against the second limiting portion (152), the three-way valve ball (3) blocks the first connection port (11) and makes the second connection port (12) communicate with the valve cap (4).

5. A three-way ball valve according to claim 1 or 2 or 3 or 4, characterized in that, The inner walls of the first connection port (11), the second connection port (12), and the valve cap (4) all have internal threads.

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