High pressure tee ball valve

Abstract

The utility model relates to valve technical field especially is related to a high pressure three -way ball valve, including valve body, ball core, valve rod and valve cover, the valve cover is installed one end at valve body, the valve rod is connected with the ball core in valve body inside through valve cover, the four valve seats that each with ball core sealed cooperation is evenly distributed to the four around of ball core in valve body inside, each valve seat is equipped with elastic sealing assembly between valve body, elastic sealing assembly extrudes valve seat to ball core direction, still be equipped with the axle seat in valve body inside, axle seat is symmetrically arranged with valve rod in both ends of ball core, recessed has the clamping groove of the valve rod embedding to ball core one end, and the other end has the lower axle embedding in axle seat, is equipped with first sliding bearing between the outer peripheral wall of lower axle and the inner peripheral wall of axle seat, the utility model discloses through the valve rod and axle seat to the ball core is carried out double -end positioner, limits the radial movement of ball core, and each direction valve seat can keep sealing with ball core under the cooperation of elastic sealing assembly.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a high-pressure three-way ball valve. Background Technology

[0002] A ball valve is a valve in which the opening and closing element, the ball, is driven by the valve stem and rotates around the valve's axis. It can also be used for fluid regulation and control. These valves should generally be installed horizontally in pipelines. Their main characteristics are compact structure, high reliability, and ease of operation and maintenance. Among them, the three-way ball valve is a widely used new type of ball valve. This type of ball valve uses four-sided seat sealing, featuring balanced force, durable seals, and low opening and closing torque.

[0003] Because of its low opening and closing torque, the three-way ball valve is also well-suited for controlling high-pressure pipelines. However, the existing three-way ball valves rely solely on the valve stem to limit the ball's movement. The ball is prone to skew during opening and closing, resulting in uneven contact between the ball and the valve seat in various directions. This creates gaps between the ball and the valve seat, which in turn leads to leakage.

[0004] The purpose of this invention is to propose corresponding solutions to the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a high-pressure three-way ball valve. This invention limits the radial movement of the ball core by limiting the ball core at both ends through the valve stem and the bearing seat. Furthermore, the valve seats in each direction can maintain a seal with the ball core with the cooperation of the elastic sealing components.

[0006] The technical solution adopted by this utility model is as follows: a high-pressure three-way ball valve, including a valve body, a ball core, a valve stem, and a valve cover. The valve cover is installed at one end of the valve body. The valve stem passes through the valve cover and connects to the ball core inside the valve body. Inside the valve body, four valve seats are evenly distributed around the ball core, each of which is sealed to the ball core. Each valve seat is provided with an elastic sealing component between itself and the valve body. The elastic sealing component presses the valve seat toward the ball core. Inside the valve body, there is also a shaft seat. The shaft seat and the valve stem are symmetrically arranged at both ends of the ball core. One end of the ball core has a recessed groove for the valve stem to be embedded, and the other end has a protruding lower shaft embedded in the shaft seat. A first sliding bearing is provided between the outer peripheral wall of the lower shaft and the inner peripheral wall of the shaft seat.

[0007] The ball core has an upper shaft protruding from one end of the corresponding slot, and a second sliding bearing is provided between the outer peripheral wall of the upper shaft and the inner peripheral wall of the valve cover.

[0008] Gaskets are sandwiched between the ball core and the valve cover, and between the ball core and the shaft seat.

[0009] The valve body has a groove for the shaft seat to be fitted inside. The outer peripheral wall of the shaft seat has at least three pins evenly distributed, and the inner peripheral wall of the groove has at least three limiting grooves that are adapted to the pins evenly distributed.

[0010] The bearing seat has an exhaust hole extending through the groove along its axial direction. The bearing seat has a tapered surface corresponding to the edge of the exhaust hole. The inner bottom wall of the groove has a conical platform that matches the tapered surface.

[0011] The elastic sealing assembly includes an elastic element, a pressure sleeve, and a sealing ring. The elastic element is disposed between the pressure sleeve and the valve body, and the sealing ring is disposed between the pressure sleeve and the valve seat. The sealing ring is made of polytetrafluoroethylene.

[0012] The valve body is equipped with three connecting pipes and a fixed blind plate. The three connecting pipes are used to connect the flow channels inside the valve body, and the fixed blind plate is used to block the flow channels inside the valve body. One of the connecting pipes is equipped with a detachable blind plate to block the connecting pipe at the end away from the valve body. The inner edge of the connecting pipe near the detachable blind plate is provided with a tapered section. The outer peripheral wall of the tapered section is a slope. A first sealing ring is sandwiched between the inner peripheral wall of the tapered section and the detachable blind plate, and a second sealing ring that fits against the slope is sandwiched between the outer peripheral wall of the tapered section and the detachable blind plate.

[0013] The beneficial effects of this utility model are as follows: This utility model limits the radial movement of the ball core by using the valve stem and shaft seat to restrict the ball core's movement at both ends, preventing the ball core from deflecting during opening and closing, ensuring uniform contact between the ball core and the valve seats in all directions, reducing the risk of leakage. Furthermore, the valve seats in all directions can maintain a seal with the ball core with the cooperation of the elastic sealing components, and can automatically compensate for the sealing gap even under high pressure or wear conditions, improving sealing reliability and service life. It is particularly suitable for the control of high-pressure pipelines. The setting of the first sliding bearing reduces the frictional resistance when the ball core rotates. Combined with the force-balanced four-sided valve seat sealing design, the opening and closing torque is further reduced, making operation more convenient and flexible, while also simplifying maintenance. The overall structure is compact and highly reliable. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0015] Figure 1 This is a cross-sectional schematic diagram of the high-pressure three-way ball valve of this utility model; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This is a cross-sectional view of the present invention from another perspective; Figure 4 for Figure 3 A magnified view of a portion of point B in the middle; Figure 5 This is a cross-sectional schematic diagram of the valve body and the shaft seat in this utility model; Figure 6 for Figure 5 An explosion diagram; In the figure, 1-valve body, 2-ball core, 3-valve stem, 4-valve cover, 5-valve seat, 6-elastic sealing assembly, 7-shaft seat, 8-slot, 9-lower shaft, 10-first sliding bearing, 11-upper shaft, 12-second sliding bearing, 13-gasket, 14-groove, 15-pin, 16-limiting groove, 17-vent hole, 18-conical surface, 19-conical platform, 20-elastic element, 21-pressure sleeve, 22-sealing ring, 23-connecting pipe, 24-fixed blind flange, 25-removable blind flange, 26-conical inclined surface, 27-first sealing ring, 28-second sealing ring. Detailed Implementation

[0016] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0017] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0018] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0019] like Figures 1 to 6As shown in the figure, a high-pressure three-way ball valve includes a valve body 1, a ball core 2, a valve stem 3, and a valve cover 4. The valve cover 4 is installed at one end of the valve body 1. The valve stem 3 passes through the valve cover 4 and connects to the ball core 2 inside the valve body 1. Four valve seats 5 are evenly distributed around the ball core 2 inside the valve body 1, each of which is in sealing fit with the ball core 2. Each valve seat 5 is provided with an elastic sealing component 6 between itself and the valve body 1. The elastic sealing component 6 presses the valve seat 5 toward the ball core 2. The valve body 1 is also provided with a shaft seat 7. The shaft seat 7 and the valve stem 3 are symmetrically arranged at both ends of the ball core 2. One end of the ball core 2 has a recessed groove 8 for the valve stem 3 to be embedded, and the other end has a protruding lower shaft 9 embedded in the shaft seat 7. A first sliding bearing 10 is provided between the outer peripheral wall of the lower shaft 9 and the inner peripheral wall of the shaft seat 7.

[0020] The beneficial effects of this design are as follows: This utility model limits the radial movement of the ball core by using the valve stem and shaft seat to restrict the ball core's movement at both ends, preventing the ball core from deflecting during opening and closing, ensuring uniform contact between the ball core and the valve seats in all directions, reducing the risk of leakage. Furthermore, the valve seats in all directions can maintain a seal with the ball core with the cooperation of the elastic sealing components, automatically compensating for the sealing gap even under high pressure or wear conditions, improving sealing reliability and service life. It is particularly suitable for the control of high-pressure pipelines. The setting of the first sliding bearing reduces the frictional resistance when the ball core rotates. Combined with the force-balanced four-sided valve seat sealing design, it further reduces the opening and closing torque, making operation more convenient and flexible, while also simplifying maintenance. The overall structure is compact and highly reliable.

[0021] In a further configuration, one end of the ball core 2 corresponding to the slot 8 has a protruding upper shaft 11, and a second sliding bearing 12 is provided between the outer peripheral wall of the upper shaft 11 and the inner peripheral wall of the valve cover 4.

[0022] The beneficial effects of this design are as follows: by setting up double support structures at both ends of the ball core, consisting of an upper shaft and a second sliding bearing, and a lower shaft and a first sliding bearing, symmetrical and full-circumferential constraint on the ball core's rotation axis is achieved. This design greatly improves the rotational stiffness and centering of the ball core, more effectively prevents deflection caused by high-pressure medium impact, and ensures uniform contact between the ball core and the sealing surfaces of each valve seat.

[0023] Furthermore, gaskets 13 are sandwiched between the ball core 2 and the valve cover 4, and between the ball core 2 and the shaft seat 7.

[0024] The beneficial effects of this design are as follows: by setting gaskets at the key mating interfaces at both ends of the ball core, the machining and assembly tolerances of parts such as the valve body and valve cover can be effectively compensated, the axial installation position of the ball core can be precisely adjusted, and the ball core can be ensured to be in the optimal sealing and rotation center, thereby further improving the reliability of the seal.

[0025] Furthermore, the valve body 1 has a groove 14 inside for the shaft seat 7 to be embedded, and at least three pins 15 are evenly distributed on the outer peripheral wall of the shaft seat 7. At least three limiting grooves 16 that are adapted to the pins 15 are evenly distributed on the inner peripheral wall of the groove 14.

[0026] The beneficial effects of this design are as follows: the engagement of at least three evenly distributed pins with the limiting grooves ensures that the bearing seat cannot rotate circumferentially within the valve body groove. This provides a stable foundation for the rotating shaft system composed of the upper shaft, lower shaft, and ball core, preventing the ball core from becoming misaligned due to bearing seat rotation, thus ensuring long-term stable contact of the sealing surface. It also plays a clear guiding and positioning role, improving assembly accuracy and efficiency.

[0027] Furthermore, the bearing seat 7 has an exhaust hole 17 extending through the groove 14 along its axial direction, and the bearing seat 7 has a tapered surface 18 corresponding to the edge of the exhaust hole 17. The inner bottom wall of the groove 14 has a conical platform 19 that matches the tapered surface 18.

[0028] The beneficial effects of this design are as follows: When the bearing seat is embedded in the mounting groove, the air between the bearing seat and the groove can be discharged along the vent hole, helping the bearing seat to be installed more accurately and with less effort. The bottom surface of the bearing seat can fit more tightly with the inner bottom wall of the groove. The tapered surface on the bearing seat matches the tapered platform of the inner bottom wall of the groove, forming a precise tapered mating surface. This structure can automatically guide and accurately center the bearing seat when it is installed in the groove, compensating for minor deviations in machining and assembly, ensuring the alignment of the lower shaft of the ball core and the bearing seat. At the same time, the large-dimensional tapered surface effectively increases the sealing contact area, working together with the vent hole to prevent high-pressure media from leaking axially from this point, thus improving the overall sealing performance.

[0029] Further, the elastic sealing assembly 6 includes an elastic element 20, a pressure sleeve 21, and a sealing ring 22. The elastic element 20 is disposed between the pressure sleeve 21 and the valve body 1, and the sealing ring 22 is disposed between the pressure sleeve 21 and the valve seat 5. The sealing ring 22 is made of polytetrafluoroethylene.

[0030] The beneficial effects of this design are as follows: In this embodiment, the elastic element adopts a spring of existing technology. The spring provides a continuous and stable initial preload, which is transmitted to the valve seat through the pressure sleeve, so that the valve seat is always in close contact with the ball core. It can also achieve self-compensation of the seal. Polytetrafluoroethylene (PTFE) is used as the sealing ring material, which makes full use of its extremely low coefficient of friction and excellent self-lubricating properties. This significantly reduces the rotational resistance of the ball core when opening and closing. In synergy with the sliding bearing, it further reduces the opening and closing torque. At the same time, the inherent good plastic deformation ability of PTFE material allows it to better fit the sealing surface, forming an extremely effective sealing barrier. It also has excellent chemical corrosion resistance, which broadens the range of media applicable to the ball valve.

[0031] Further, three connecting pipes 23 and a fixed blind plate 24 are installed around the valve body 1. The three connecting pipes 23 are used to connect the flow channels inside the valve body 1, and the fixed blind plate 24 is used to block the flow channels inside the valve body 1. One of the connecting pipes 23 is equipped with a detachable blind plate 25 for blocking the connecting pipe 23 at the end away from the valve body 1. The inner edge of the connecting pipe 23 near the detachable blind plate 25 is provided with a tapered slope 26. The outer peripheral wall of the tapered slope 26 is a slope. A first sealing ring 27 is sandwiched between the inner peripheral wall of the tapered slope 26 and the detachable blind plate 25, and a second sealing ring 28 that fits against the slope is sandwiched between the outer peripheral wall of the tapered slope 26 and the detachable blind plate 25.

[0032] The advantages of this design are as follows: the blind flange, also known as the flange cover, is used to seal the pipe opening. By setting three connecting pipes and one fixed blind flange, the three-way ball valve can flexibly adapt to various pipeline layout requirements. In particular, the detachable blind flange installed at the end of one of the connecting pipes allows for flexible installation and removal, facilitating the external connection of the connecting pipe. The first and second sealing rings on both sides of the conical slope form a bidirectional synergistic seal. When the pressure inside the pipeline increases, the second sealing ring can also fit tightly against the slope, ensuring good sealing performance, making it more suitable for high-pressure conditions.

[0033] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A high-pressure three-way ball valve, comprising a valve body (1), a ball core (2), a valve stem (3), and a valve cover (4), wherein the valve cover (4) is installed at one end of the valve body (1), and the valve stem (3) passes through the valve cover (4) and connects to the ball core (2) inside the valve body (1), characterized in that: The valve body (1) has four valve seats (5) evenly distributed around the ball core (2) inside, each of which is sealed to the ball core (2). Each valve seat (5) is provided with an elastic sealing component (6) between itself and the valve body (1). The elastic sealing component (6) presses the valve seat (5) toward the ball core (2). The valve body (1) also has a shaft seat (7) inside. The shaft seat (7) and the valve stem (3) are symmetrically arranged at both ends of the ball core (2). One end of the ball core (2) has a recessed groove (8) for the valve stem (3) to be embedded, and the other end has a protruding lower shaft (9) embedded in the shaft seat (7). A first sliding bearing (10) is provided between the outer peripheral wall of the lower shaft (9) and the inner peripheral wall of the shaft seat (7).

2. The high-pressure three-way ball valve according to claim 1, characterized in that: The ball core (2) has an upper shaft (11) protruding at one end corresponding to the slot (8), and a second sliding bearing (12) is provided between the outer peripheral wall of the upper shaft (11) and the inner peripheral wall of the valve cover (4).

3. The high-pressure three-way ball valve according to claim 2, characterized in that: Gaskets (13) are sandwiched between the ball core (2) and the valve cover (4) and between the ball core (2) and the shaft seat (7).

4. The high-pressure three-way ball valve according to claim 1, characterized in that: The valve body (1) has a groove (14) for the shaft seat (7) to be fitted inside. At least three pins (15) are evenly distributed on the outer peripheral wall of the shaft seat (7). At least three limiting grooves (16) that are adapted to the pins (15) are evenly distributed on the inner peripheral wall of the groove (14).

5. The high-pressure three-way ball valve according to claim 4, characterized in that: The bearing seat (7) has an exhaust hole (17) extending through the groove (14) along its axial direction. The bearing seat (7) has a tapered surface (18) corresponding to the edge of the exhaust hole (17). The inner bottom wall of the groove (14) has a conical platform (19) that matches the tapered surface (18).

6. The high-pressure three-way ball valve according to claim 1, characterized in that: The elastic sealing assembly (6) includes an elastic element (20), a pressure sleeve (21) and a sealing ring (22). The elastic element (20) is disposed between the pressure sleeve (21) and the valve body (1), and the sealing ring (22) is disposed between the pressure sleeve (21) and the valve seat (5). The sealing ring (22) is made of polytetrafluoroethylene.

7. The high-pressure three-way ball valve according to claim 1, characterized in that: The valve body (1) is equipped with three connecting pipes (23) and a fixed blind plate (24) around its perimeter. The three connecting pipes (23) are used to connect the flow channels inside the valve body (1), and the fixed blind plate (24) is used to block the flow channels inside the valve body (1). One of the connecting pipes (23) is equipped with a detachable blind plate (25) for blocking the connecting pipe (23) at the end away from the valve body (1). The inner edge of the connecting pipe (23) near the detachable blind plate (25) is provided with a tapered inclined portion (26). The outer peripheral wall of the tapered inclined portion (26) is a slope. A first sealing ring (27) is sandwiched between the inner peripheral wall of the tapered inclined portion (26) and the detachable blind plate (25). A second sealing ring (28) that fits against the slope is sandwiched between the outer peripheral wall of the tapered inclined portion (26) and the detachable blind plate (25).

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