Ball valve

Abstract

The utility model provides a ball valve, and belongs to the technical field of valves. The technical problem that a sealing ring of an existing ball valve is prone to abrasion is solved. The ball valve comprises a valve body and a three-way ball core, the three-way ball core is fixedly connected with a valve handle, a transparent cover is further arranged in the valve body, a first fixing seat and a second fixing seat are fixedly arranged between the three-way ball core and the transparent cover, a ball sealing piece is arranged between the first fixing seat and the three-way ball core, and a first sealing piece is arranged between the first fixing seat and the valve body. A second sealing piece is arranged between the second fixing base and the transparent cover, an elastic gasket is arranged between the end, away from the ball sealing piece, of the first fixing base and the end, away from the second sealing piece, of the second fixing base, and a third fixing base consistent with the first fixing base in axis is fixedly arranged in the valve body. And ball sealing pieces are arranged between the third fixing seat and the three-way ball core, and the two ball sealing pieces are symmetrically arranged. The sealing reliability is improved, leakage is prevented, and the overall service life is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and specifically refers to a ball valve. Background Technology

[0002] In residential HVAC systems (such as underfloor heating and air conditioning water circulation), ball valves hold a central position due to their advantages of easy operation, reliable sealing, and low flow resistance. However, due to the narrow space in residential HVAC equipment rooms, multiple valves connected in parallel require additional pipe bends that occupy space. Therefore, in order to meet the demands of compact space, simple operation, and low maintenance costs in residential HVAC systems, multi-functional valves are needed to replace multiple valves connected in parallel.

[0003] Existing technology, such as the multi-functional water-saving flow valve with application number 2024213508548, employs an innovative design that links the inlet switch to a three-way ball valve and the drain switch to a two-way ball valve, enabling flexible switching of a single ball valve for multiple pipeline modes, including inlet, drain, and cleaning. A connecting block is fixed between the three-way ball valve and the transparent cover. This connecting block and the interior of the transparent cover together form the installation chamber for the flow float and flow spring. The connecting block and the three-way ball valve are dynamically sealed and fixed by a ball seal, while a static seal is achieved between the connecting block and the transparent cover using a sealing ring. When the three-way ball valve rotates, the ball seal is dynamically compressed by the ball, transmitting non-uniform stress to the connecting block, causing periodic shaking. This shaking results in the sealing ring between the connecting block and the transparent cover being subjected to alternating shear forces for a long time, accelerating the wear and aging of the sealing ring, ultimately leading to leakage risks and directly affecting the overall service life. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a ball valve.

[0005] The objective of this utility model can be achieved through the following technical solution: A ball valve includes a valve body, a three-way ball core rotatably disposed within the valve body, the three-way ball core being fixedly connected to a valve handle, a transparent cover being disposed within the valve body, a first fixed seat and a second fixed seat being fixedly disposed between the three-way ball core and the transparent cover, a ball seal being disposed between the first fixed seat and the three-way ball core, a first seal being disposed between the first fixed seat and the valve body, a second seal being disposed between the second fixed seat and the transparent cover, an elastic washer being disposed between the end of the first fixed seat away from the ball seal and the end of the second fixed seat away from the second seal, a third fixed seat being fixedly disposed within the valve body and aligned with the axis of the first fixed seat, a ball seal being disposed between the third fixed seat and the three-way ball core, and the two ball seals being symmetrically disposed. By incorporating a first fixed seat, a second fixed seat, and an elastic washer, the dynamic compressive force and potential non-uniform stress generated when the tee ball core rotates are transmitted to the first fixed seat through the ball seal. The elastic washer, made of rubber, is located between the first and second fixed seats, effectively absorbing and buffering the dynamic stress and vibration of the first fixed seat, keeping the second fixed seat relatively stationary or slightly moving, thus avoiding the severe periodic shaking of the connecting block in the original design. Therefore, the second seal, located between the second fixed seat and the transparent cover, no longer bears alternating shear force, solving the problem of accelerated wear and aging of the second seal ring caused by shaking, extending the service life of the second seal ring, improving sealing reliability, preventing leakage, and extending the overall service life.

[0006] In the aforementioned ball valve, the outer surface of the first fixed seat and the inner surface of the valve body are in clearance fit. The outer surface of the first fixed seat has an inwardly recessed first sealing groove, and there are two such first sealing grooves. The first sealing element is fixedly located between the first sealing groove and the inner surface of the valve body. The clearance fit between the outer surface of the first fixed seat and the inner surface of the valve body, along with the first sealing element located within the first sealing groove, forms a stable static sealing interface and radially supports the first fixed seat, making the first fixed seat more stable.

[0007] In the aforementioned ball valve, the outer surface of the second fixed seat and the inner surface of the valve body are in clearance fit. The outer surface of the second fixed seat has an L-shaped second sealing groove recessed inwards. There is a gap between the opening end face of the second sealing groove and the upper end face of the transparent cover. The second sealing element is fixedly located between the second sealing groove and the upper end face of the transparent cover. A static seal is achieved between the second fixed seat and the transparent cover through the second sealing element. The gap between the opening end face of the L-shaped second sealing groove and the upper end face of the transparent cover allows the second sealing element to be better deformed under pressure to achieve a seal.

[0008] In the aforementioned ball valve, a first annular block protrudes inward from the inner surface of the first fixed seat. The inner diameter of the first annular block is smaller than the inner diameter of the inner surface of the first fixed seat. A second annular block is formed at the upper end of the second fixed seat and is embedded in the inner surface of the first fixed seat. An elastic washer is fixedly disposed between the second annular block and the first annular block. Through the interlocking structure of the first and second fixed seats and the elastic washer, the first and second fixed seats form a more stable overall structure. The third fixed seat is symmetrically arranged with the axis of the first fixed seat and is fixedly connected to the valve body through a third sealing element and a threaded fixing method. This not only provides sealing support for the three-way ball core on the other side but also balances the stress on the overall structure, enhancing the overall rigidity and stability.

[0009] In the ball valve described above, a flow float and a flow spring are provided inside the second fixed seat and the transparent cover, with the upper part of the flow spring abutting against the second annular block.

[0010] In the ball valve described above, a third sealing element is fixedly provided between the outer side of the third fixed seat and the inner side of the valve body, and the third fixed seat and the valve body are threadedly fixedly connected.

[0011] In the aforementioned ball valve, the three-way ball core is formed with a first channel, a second channel, a third channel, and a sealing part. The axes of the first channel and the second channel are connected in a straight line, and the axis of the third channel is perpendicular to the axes of the first channel and the second channel. The sealing part and the third channel are arranged opposite to each other.

[0012] In the aforementioned ball valve, the valve body includes an inlet channel, an outlet channel, and a cleaning channel. A two-way ball core is provided in the cleaning channel. After the valve handle rotates the three-way ball core, the first channel connects to the inlet channel, the second channel connects to the outlet channel, and the third channel connects to the cleaning channel. The cleaning channel is blocked by the two-way ball core. After the valve handle rotates the three-way ball core, the third channel connects to the inlet channel, the second channel connects to the cleaning channel, and the blocking part blocks the outlet channel.

[0013] In the ball valve described above, a fixing part protrudes inward from the inner side wall of the valve body, the second fixing seat is threadedly fixed to the fixing part, and the lower end face of the first fixing seat abuts against the fixing part.

[0014] Compared with the prior art, the technical effects of this utility model are as follows: by separating the dynamic seal between the three-way ball core and the first fixed seat from the static seal between the second fixed seat and the transparent cover, the dynamic stress is absorbed and buffered by the ball seal and the elastic gasket. The second seal works in a stable compression state and is almost unaffected by the dynamic stress, which improves the sealing reliability, prevents leakage, and extends the overall service life. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of one embodiment of the present utility model.

[0016] Figure 2 This is an enlarged view of section A in Embodiment 1 of this utility model.

[0017] Figure 3 This is a cross-sectional view from another direction of Embodiment 1 of this utility model.

[0018] Figure 4 This is a perspective view of Embodiment 1 of the present utility model.

[0019] Figure 5 This is a cross-sectional view of Embodiment 2 of this utility model.

[0020] Figure 6 This is an enlarged view of section B of Embodiment 1 of this utility model.

[0021] Drawing number markings: 1. Valve body; 101. Inlet channel; 102. Outlet channel; 103. Cleaning channel; 104. Fixing part; 2. Three-way ball core; 201. First channel; 202. Second channel; 203. Third channel; 204. Sealing part; 3. Valve handle; 4. Transparent cover; 5. First fixing seat; 501. First sealing groove; 502. First annular block; 6. Second fixing seat; 601. Second sealing groove; 602. Second annular block; 7. Ball seal; 8. First seal; 9. Second seal; 10. Elastic washer; 11. Third fixing seat; 12. Flow float; 13. Flow spring; 14. Third seal; 15. Two-way ball core; 16. Two-way handle. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] It should be noted that the descriptions of "up", "down", "left", "right", "inner" and "outer" directions in this utility model are defined based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Example 1: According to Figures 1 to 4As shown, a ball valve includes a valve body 1, a three-way ball core 2 and a two-way ball core 15 rotatably disposed within the valve body 1, and a valve handle 3 fixedly connected to the three-way ball core 2. The three-way ball core 2 is formed with a first channel 201, a second channel 202, a third channel 203, and a blocking part 204. The axes of the first channel 201 and the second channel 202 are linearly connected, and the axis of the third channel 203 is perpendicular to the axes of the first channel 201 and the second channel 202. The blocking part 204 and the third channel 203 are arranged opposite to each other, and the first channel 201, the second channel 202, the third channel 203, and the blocking part 204 are arranged in a cross shape. The two-way ball core 15 includes a straight water passage, and a two-way handle 16 is fixedly connected to the outside of the two-way ball core 15. The valve body 1 includes an inlet channel 101, an outlet channel 102, and a cleaning channel 103. A two-way ball core 15 is installed in the cleaning channel 103. After the valve handle 3 rotates the three-way ball core 2, the first channel 201 connects to the inlet channel 101, the second channel 202 connects to the outlet channel 102, and the third channel 203 connects to the cleaning channel 103. The cleaning channel 103 is blocked by the two-way ball core 15. At this time, the water flowing into the inlet channel 101 flows directly to the outlet channel 102, and the inlet mode is activated. After the valve handle 3 rotates the three-way ball core 2, the third channel 203 connects to the inlet channel 101, the second channel 202 connects to the cleaning channel 103, and the blocking part 204 blocks the outlet channel 102. The two-way handle 16 opens the two-way ball core 15. At this time, the water flowing into the inlet channel 101 flows to the cleaning channel 103, and the cleaning function is activated.

[0025] A transparent cover 4 is also provided inside the valve body 1. A first fixing seat 5 and a second fixing seat 6 are fixedly arranged between the three-way ball core 2 and the transparent cover 4. A ball seal 7 is arranged between the first fixing seat 5 and the three-way ball core 2. A first seal 8 is arranged between the first fixing seat 5 and the valve body 1. A second seal 9 is arranged between the second fixing seat 6 and the transparent cover 4. An elastic washer 10 is arranged between the end of the first fixing seat 5 away from the ball seal 7 and the end of the second fixing seat 6 away from the second seal 9. A third fixing seat 11 is fixedly arranged inside the valve body 1, which is aligned with the axis of the first fixing seat 5. A ball seal 7 is arranged between the third fixing seat 11 and the three-way ball core 2. The two ball seals 7 are symmetrically arranged. The first fixing seat 5 and the ball seal 7 are preferably integrally injection molded. By setting up a first fixed seat 5, a second fixed seat 6, and an elastic washer 10, the dynamic extrusion force and possible non-uniform stress generated when the tee ball core 2 rotates are transmitted to the first fixed seat 5 through the ball seal 7. The elastic washer 10 is made of rubber and is located between the first fixed seat 5 and the second fixed seat 6. The elastic washer 10 effectively absorbs and buffers the dynamic stress and vibration of the first fixed seat 5, keeping the second fixed seat 6 in a relatively static or slightly moving state, avoiding the violent periodic shaking of the connecting block in the original design. Therefore, the second sealing element 9 located between the second fixed seat 6 and the transparent cover 4 no longer bears alternating shear force, solving the problem of accelerated wear and aging of the second sealing ring caused by shaking, extending the service life of the second sealing ring, improving sealing reliability, preventing leakage, and extending the overall service life.

[0026] The outer side of the first fixed seat 5 and the inner side of the valve body 1 are clearance-fitted. The outer side of the first fixed seat 5 has an inwardly recessed first sealing groove 501. There are two first sealing grooves 501. The first sealing element 8 is fixedly located between the first sealing groove 501 and the inner side of the valve body 1. The clearance fit between the outer side of the first fixed seat 5 and the inner side of the valve body 1, and the first sealing element 8 located in the first sealing groove 501, form a stable static sealing interface with the two first sealing elements 8, which also radially support the first fixed seat 5, making the first fixed seat 5 more stable.

[0027] The outer side of the second fixing seat 6 and the inner side of the valve body 1 are fitted with a clearance. An L-shaped second sealing groove 601 is recessed inward on the outer side of the second fixing seat 6. A gap exists between the opening end face of the second sealing groove 601 and the upper end face of the transparent cover 4. The second sealing element 9 is fixedly located between the second sealing groove 601 and the upper end face of the transparent cover 4. A static seal is achieved between the second fixing seat 6 and the transparent cover 4 through the second sealing element 9. The gap between the opening end face of the L-shaped second sealing groove 601 and the upper end face of the transparent cover 4 allows the second sealing element 9 to be better deformed under pressure to achieve a seal.

[0028] The inner side of the first fixed seat 5 has a first annular block 502 protruding inward. The inner diameter of the first annular block 502 is smaller than the inner diameter of the inner side of the first fixed seat 5. The upper end of the second fixed seat 6 has a second annular block 602 formed therein. The second annular block 602 is embedded in the inner side of the first fixed seat 5. An elastic washer 10 is fixedly installed between the second annular block 602 and the first annular block 502. Through the interlocking structure of the first fixed seat 5 and the second fixed seat 6 and the elastic washer 10, the first fixed seat 5 and the second fixed seat 6 form a more stable overall structure. The third fixed seat 11 is symmetrically arranged with the axis of the first fixed seat 5 and is fixedly connected to the valve body 1 through the third sealing element 14 and the threaded fixing method. This not only provides sealing support for the three-way ball core 2 on the other side, but also balances the stress on the overall structure and enhances the overall rigidity and stability.

[0029] The second fixed seat 6 and the transparent cover 4 are equipped with a flow float 12 and a flow spring 13. The top of the flow spring 13 abuts against the second annular block 602. A third sealing element 14 is fixedly installed between the outer side of the third fixed seat 11 and the inner side of the valve body 1. The third fixed seat 11 and the valve body 1 are threadedly fixedly connected.

[0030] Example 2: According to Figure 5 , Figure 6 As shown, unlike Embodiment 1, the inner wall of this valve body 1 has a protruding fixing part 104. To better process the threads of the fixing part 104, the valve body 1 can be configured as a separate unit. The second fixing seat 6 is threadedly fixed to the fixing part 104. After the second fixing seat 6 is fixed, the second sealing member 9 is securely fixed between the second fixing seat 6, the transparent cover 4, and the valve body 1. The lower end face of the first fixing seat 5 abuts against the fixing part 104, and the upper end face of the first fixing seat 5 is provided with a ball sealing member 7 that is sealed and rotated with the three-way ball core 2. The first fixing seat 5 is securely fixed inside the valve body 1 by being threadedly fixed to the valve body 1 by the third fixing seat 11.

[0031] The dynamic seal of the three-way ball core 2 and the first fixed seat 5 is separated from the static seal of the second fixed seat 6 and the transparent cover 4. The dynamic stress is absorbed and buffered by the ball seal 7 and the elastic washer 10. The second seal 9 works in a stable compression state and is almost unaffected by the dynamic stress, which improves the sealing reliability, prevents leakage, and extends the overall service life.

[0032] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. A ball valve, comprising a valve body (1), a three-way ball core (2) rotatably disposed within the valve body (1), the three-way ball core (2) being fixedly connected to a valve handle (3), and a transparent cover (4) further disposed within the valve body (1), characterized in that: A first fixing seat (5) and a second fixing seat (6) are fixedly arranged between the three-way ball core (2) and the transparent cover (4). A ball seal (7) is arranged between the first fixing seat (5) and the three-way ball core (2). A first seal (8) is arranged between the first fixing seat (5) and the valve body (1). A second seal (9) is arranged between the second fixing seat (6) and the transparent cover (4). An elastic washer (10) is arranged between the end of the first fixing seat (5) away from the ball seal (7) and the end of the second fixing seat (6) away from the second seal (9). A third fixing seat (11) is fixedly arranged inside the valve body (1) and is aligned with the axis of the first fixing seat (5). A ball seal (7) is arranged between the third fixing seat (11) and the three-way ball core (2). The two ball seals (7) are arranged symmetrically.

2. A ball valve according to claim 1, characterized in that: The outer side of the first fixing seat (5) and the inner side of the valve body (1) are fitted with a clearance. The outer side of the first fixing seat (5) is recessed inward with a first sealing groove (501). There are two first sealing grooves (501). The first sealing element (8) is fixedly located between the first sealing groove (501) and the inner side of the valve body (1).

3. A ball valve according to claim 2, characterized in that: The outer side of the second fixing seat (6) and the inner side of the valve body (1) are fitted with a clearance. The outer side of the second fixing seat (6) is recessed inward with an L-shaped second sealing groove (601). There is a gap between the opening end face of the second sealing groove (601) and the upper end face of the transparent cover (4). The second sealing element (9) is fixed between the second sealing groove (601) and the upper end face of the transparent cover (4).

4. A ball valve according to claim 3, characterized in that: The inner side of the first fixing seat (5) has a first annular block (502) protruding inward. The inner diameter of the first annular block (502) is smaller than the inner diameter of the inner side of the first fixing seat (5). The upper end of the second fixing seat (6) has a second annular block (602) formed therein. The second annular block (602) is embedded in the inner side of the first fixing seat (5). An elastic washer (10) is fixedly provided between the second annular block (602) and the first annular block (502).

5. A ball valve according to claim 4, characterized in that: The second fixed seat (6) and the transparent cover (4) are provided with a flow float (12) and a flow spring (13), and the top of the flow spring (13) abuts against the second annular block (602).

6. A ball valve according to any one of claims 1 to 5, characterized in that: A third sealing element (14) is fixedly provided between the outer side of the third fixing seat (11) and the inner side of the valve body (1), and the third fixing seat (11) and the valve body (1) are threadedly fixedly connected.

7. A ball valve according to claim 6, characterized in that: The three-way ball core (2) is formed with a first channel (201), a second channel (202), a third channel (203) and a sealing part (204). The axes of the first channel (201) and the second channel (202) are connected in a straight line, and the axis of the third channel (203) is perpendicular to the axes of the first channel (201) and the second channel (202). The sealing part (204) and the third channel (203) are arranged opposite to each other.

8. A ball valve according to claim 7, characterized in that: The valve body (1) includes an inlet channel (101), an outlet channel (102), and a cleaning channel (103). The cleaning channel (103) is provided with a two-way ball core (15). After the valve handle (3) rotates the three-way ball core (2), the first channel (201) connects to the inlet channel (101), the second channel (202) connects to the outlet channel (102), and the third channel (203) connects to the cleaning channel (103). The cleaning channel (103) is blocked by the two-way ball core (15). After the valve handle (3) rotates the three-way ball core (2), the third channel (203) connects to the inlet channel (101), the second channel (202) connects to the cleaning channel (103), and the blocking part (204) blocks the outlet channel (102).

9. A ball valve according to claim 1, characterized in that: The valve body (1) has a fixing part (104) protruding inward on its inner side wall. The second fixing seat (6) is threadedly fixed to the fixing part (104). The lower end face of the first fixing seat (5) abuts against the fixing part (104).

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