Grease injection ball valve

Abstract

According to the technical scheme, the grease injection ball valve is characterized in that the grease injection ball valve comprises a valve body, a ball core limited in the valve body, two valve seats located on the two sides of the ball core respectively, sealing rings limited between the valve seats and the ball core and a grease injection valve located on the outer wall of the valve body, and the valve body and the valve seats are respectively provided with a body channel and a seat channel which are communicated with each other; a sealing groove for containing the sealing ring is formed in the valve seat, the seat channel is communicated with the sealing groove, and the sealing ring is provided with an open groove which is located in the sealing groove and can be communicated with the seat channel, a lubricating groove with an opening facing the surface of the ball core and a plurality of drainage holes which are circumferentially distributed around the axis of the sealing ring and enable the open groove to be communicated with the lubricating groove. The opening edge of the sealing groove is provided with an anti-disengaging ring which is used for preventing the sealing ring from disengaging from the valve seat and is coaxial with the valve seat, and the problems that in the prior art, the sealing ring is poor in lubricating effect and prone to disengaging from the valve seat are solved.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and more specifically to a grease injection ball valve. Background Technology

[0002] like Figure 1 As shown, the existing grease injection ball valve includes a valve body 1, a ball core 2 confined within the valve body 1, two valve seats 3 located on both sides of the ball core 2, a sealing ring 4 confined between the valve seats 3 and the ball core 2, and a grease injection valve 5 positioned on the outer wall of the valve body 1. The valve body 1 and the valve seats 3 are respectively provided with interconnected body channels 6 and seat channels 7. Grease injected into the valve body 1 by the grease injection valve 5 flows through the body channels 6 and seat channels 7 to reach the outer wall of the ball core 2. The existing technology has defects. First, because the circumferential diameter of the port of the seat channel 7 facing the ball core 2 is smaller than the diameter of the sealing ring 4, most of the grease entering the valve body 1 directly enters the flow channel, resulting in poor lubrication of the sealing ring 4. This leads to severe wear of the sealing ring 4 under the rotation of the ball core 2, resulting in a short service life. Second, the sealing ring 4 is in long-term contact with the surface of the ball core 2, resulting in adhesion. This makes the sealing ring 4 easily driven by the ball core 2 and detached from the valve seat 3. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a grease injection ball valve with a durable sealing ring and a stable connection between the sealing ring and the valve seat.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a grease injection ball valve, comprising a valve body, a ball core contained within the valve body, two valve seats located on opposite sides of the ball core, a sealing ring located between the valve seats and the ball core, and a grease injection valve positioned on the outer wall of the valve body. The valve body and valve seats are respectively provided with a body channel and a seat channel that communicate with each other. The valve seat is provided with a sealing groove for accommodating the sealing ring. The seat channel communicates with the sealing groove. The sealing ring is provided with a slot located within the sealing groove and communicating with the seat channel, a lubrication groove with its opening facing the surface of the ball core, and multiple drainage holes that are circumferentially distributed around the axis of the sealing ring and connect the slot and the lubrication groove. The slot and the lubrication groove are coaxial with the sealing ring. An anti-detachment ring is provided at the edge of the opening of the sealing groove to prevent the sealing ring from detaching from the valve seat and is coaxial with the valve seat. By introducing grease into the slot, drainage holes, and lubrication groove successively, the ball core rotates smoothly relative to the sealing ring.

[0005] As a further improvement of this utility model, the groove is located on the outer wall of the sealing ring, and the anti-detachment ring is located at the groove wall port of the sealing groove away from the center of the valve seat.

[0006] As a further improvement of this utility model, the bottom of the lubrication groove is arc-shaped and the sides of the bottom of the groove are all located on the surface where the sealing ring and the ball core are in contact.

[0007] As a further improvement of this utility model, the anti-detachment ring protrudes towards the ball core at the position where it connects with the valve seat.

[0008] The beneficial effects of this utility model are as follows: By introducing grease sequentially into the slot, the drainage hole, and the lubrication groove, the ball core rotates smoothly relative to the sealing ring. Compared with existing technologies, the design of guiding grease into the lubrication groove can effectively and fully lubricate the sealing ring, facilitating the smooth rotation of the ball core relative to the sealing ring, reducing the degree of wear on the sealing ring, and allowing the sealing ring to be separated from the ball core periodically as needed, effectively compensating for the defect of the sealing ring and the ball core sticking together after long-term contact. The design of the lubrication groove can reduce the contact area between the sealing ring and the ball core surface while maintaining a stable sealing effect, thereby reducing the resistance encountered by the ball core when rotating relative to the sealing ring. The anti-detachment ring design can prevent the sealing ring from failing to detach from the valve seat even when pushed by grease, ensuring the connection stability of the sealing ring within the valve seat. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the existing technology;

[0010] Figure 2 This is a schematic diagram of the structure of this utility model;

[0011] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0012] Figure 4 This is a partial perspective view of the sealing ring in this utility model.

[0013] Reference numerals in the attached diagram: 1. Valve body; 2. Ball core; 3. Valve seat; 4. Sealing ring; 41. Groove; 42. Lubrication groove; 43. Drain hole; 5. Grease injection valve; 6. Body passage; 7. Seat passage; 8. Sealing groove; 9. Anti-detachment ring. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals.

[0015] Reference Figures 1 to 4 As shown, a grease injection ball valve of this embodiment includes a valve body 1, a ball core 2 confined within the valve body 1, two valve seats 3 respectively located on both sides of the ball core 2, a sealing ring 4 confined between the valve seat 3 and the ball core 2, and a grease injection valve 5 positioned on the outer wall of the valve body 1. The valve body 1 and the valve seat 3 are respectively provided with a body channel 6 and a seat channel 7 that communicate with each other. The valve seat 3 is provided with a sealing groove 8 for the sealing ring 4 to be accommodated.

[0016] Based on the aforementioned existing technology, by changing the mold for injection molding, a groove 41 is processed on one end face of the sealing ring 4, and a lubrication groove 42 is processed on the surface of the sealing ring 4 used to fit with the ball core 2. The groove 41 and the lubrication groove 42 are both coaxial with the sealing ring 4 and are annular. A hole is drilled on the bottom of the groove 41 and multiple drainage holes 43 are processed in a circular distribution around the axis of the sealing ring 4. The other end of the drainage hole 43 is located on the bottom of the lubrication groove 42. For the processing of the valve seat 3, the seat channel 7 is connected to the sealing groove 8. Then, an anti-detachment ring 9 coaxial with the valve seat 3 is processed at the opening edge of the sealing groove 8.

[0017] During the assembly process, the sealing ring 4 with the slot 41 is squeezed to allow the sealing ring 4 to enter the sealing groove 8. Then, the sealing ring 4 is gradually pushed into the sealing groove 8. When the sealing ring 4 passes the anti-detachment ring 9, it will undergo local elastic deformation and recover its elastic deformation after entering the sealing groove 8 until the sealing ring 4 is installed in the sealing groove 8. The slot 41 is connected to the seat channel 7. The anti-detachment ring 9 blocks part of the sealing ring 4 so that the sealing ring 4 cannot move along the thickness direction of the valve seat 3. Finally, the two assembled valve seats 3 are installed into the valve body 1 and located on both sides of the ball core 2. The surface of the sealing ring 4 with the lubrication groove 42 is in contact with the ball core 2.

[0018] During use, grease is injected into the valve body 1 through the grease injection valve 5. The grease flows through the body channel 6, seat channel 7, slot 41, and drain hole 43 to reach the lubrication groove 42. The grease will fill the slot 41, drain hole 43, and lubrication groove 42. If too much grease is injected, the grease will continue to fill the lubrication groove 42 and push the valve seat 3 away from the ball core 2. The spring connected to the valve seat 3 will be compressed and deformed. As the valve seat 3 moves away from the ball core 2, the sealing ring 4 and the surface of the ball core 2 will also separate. The excess grease will enter the flow channel and be discharged. At the same time, it can lubricate the surface of the sealing ring 4 and the ball core 2. As the grease returns to an appropriate amount, the spring returns to its deformation and pushes the valve seat 3 towards the ball core 2, so that the sealing ring 4 and the ball core 2 are re-adhered. If the amount of grease injected is appropriate, the slot 41, drain hole 43, and lubrication groove 42 will remain filled, but the sealing ring 4 and the surface of the ball core 2 will remain sealed.

[0019] Compared to existing technologies, the design of channeling grease into the lubrication groove 42 can effectively and fully lubricate the sealing ring 4, facilitating the smooth rotation of the ball core 2 relative to the sealing ring 4, reducing the wear of the sealing ring 4, and allowing the sealing ring 4 to be separated from the ball core 2 periodically as needed, effectively compensating for the defect of the sealing ring 4 and the ball core 2 sticking together due to long-term contact. The design of the lubrication groove 42 can reduce the contact area between the surface of the sealing ring 4 and the ball core 2 while maintaining a stable sealing effect, thereby reducing the resistance encountered by the ball core 2 when rotating relative to the sealing ring 4. The design of the anti-detachment ring 9 can prevent the sealing ring 4 from failing to detach from the valve seat 3 even when pushed by grease, ensuring the connection stability of the sealing ring 4 within the valve seat 3.

[0020] As one specific implementation method of the improvement, refer to Figure 3 and Figure 4 As shown, the groove 41 is located on the outer wall of the sealing ring 4, and the anti-detachment ring 9 is located at the end of the groove wall of the sealing groove 8 away from the center of the valve seat 3. Therefore, both the groove 41 and the anti-detachment ring 9 are located on the outer side of the circumference of the multiple drainage holes 43. When the groove 41 is filled with grease, the grease exerts a lateral force along the thickness direction of the valve seat 3 and a longitudinal force along the diameter direction of the valve seat 3 on the sealing ring 4. The resistance force exerted by the anti-detachment ring 9 on the sealing ring 4 is on the same straight line as the lateral force and in the opposite direction. Thus, the grease and the anti-detachment ring 9 together clamp a portion of the sealing ring 4, and the sealing groove 8... The supporting force and longitudinal force generated by the wall on the sealing ring 4 are on the same straight line and opposite in direction. The grease and the inner wall of the sealing groove 8 together hold the other part of the sealing ring 4. The two clamping forces can effectively ensure the connection stability of the sealing ring 4 in the sealing groove 8. At the same time, compared with the design of setting the slot 41 and the anti-detachment ring 9 on the inner and outer sides of the circumference of the multiple drainage holes 43 respectively, it can make up for the defect that the obstructing force and the lateral force are not on the same straight line, which will generate shear force on the sealing ring 4, causing the sealing ring 4 to be damaged due to uneven force, and further extend the service life of the sealing ring 4.

[0021] As one specific implementation method of the improvement, refer to Figure 3 As shown, the bottom of the lubrication groove 42 is arc-shaped and the sides of the bottom are all located on the surface where the sealing ring 4 and the ball core 2 are in contact. The distance between the lubrication groove 42 and the ball core 2 gradually decreases from the center to both sides. When the grease fills the lubrication groove 42 and expands the lubrication groove 42, the local deformation of the sealing ring 4 is slowed down. This design can further ensure the structural stability of the sealing ring 4 and extend the service life of the sealing ring 4.

[0022] As one specific implementation method of the improvement, refer to Figure 3 As shown, the anti-slip ring 9 protrudes towards the ball core 2 at the position where it connects with the valve seat 3. This design increases the thickness of the connection between the anti-slip ring 9 and the valve seat 3, thereby increasing the connection strength between the anti-slip ring 9 and the valve seat 3, improving the bending resistance of the anti-slip ring 9, and indirectly extending the service life of the anti-slip ring 9.

[0023] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A grease injection ball valve, comprising a valve body (1), a ball core (2) confined within the valve body (1), two valve seats (3) respectively located on both sides of the ball core (2), a sealing ring (4) confined between the valve seats (3) and the ball core (2), and a grease injection valve (5) positioned on the outer wall of the valve body (1), wherein the valve body (1) and the valve seats (3) are respectively provided with a body channel (6) and a seat channel (7) communicating with each other, and the valve seats (3) are provided with a sealing groove (8) for the sealing ring (4) to be accommodated, characterized in that: The seat channel (7) is connected to the sealing groove (8). The sealing ring (4) is provided with a slot (41) located in the sealing groove (8) and connected to the seat channel (7), a lubrication groove (42) with the opening facing the surface of the ball core (2), and a plurality of drainage holes (43) that are circumferentially distributed around the axis of the sealing ring (4) and connect the slot (41) and the lubrication groove (42). The slot (41) and the lubrication groove (42) are coaxial with the sealing ring (4). The edge of the opening of the sealing groove (8) is provided with an anti-detachment ring (9) to prevent the sealing ring (4) from detaching from the valve seat (3) and coaxial with the valve seat (3). By introducing grease into the slot (41), drainage hole (43) and lubrication groove (42) in sequence, the ball core (2) rotates smoothly relative to the sealing ring (4).

2. The grease injection ball valve according to claim 1, characterized in that: The slot (41) is located on the outer wall of the sealing ring (4), and the anti-detachment ring (9) is located at the end of the groove wall of the sealing groove (8) away from the center of the valve seat (3).

3. A grease injection ball valve according to claim 1 or 2, characterized in that: The bottom of the lubrication groove (42) is arc-shaped and the sides of the bottom are located on the surface where the sealing ring (4) and the ball core (2) are in contact.

4. A grease injection ball valve according to claim 1 or 2, characterized in that: The anti-detachment ring (9) protrudes towards the ball core (2) at the position where it is connected to the valve seat (3).

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