Ball valve with good sealing performance

Abstract

The ball valve with the good sealing performance comprises a valve body and an upper cover, the upper cover is arranged on the valve body, a spherical groove is formed in the middle of the valve body, a valve element is arranged in the spherical groove, a water inlet hole and a water outlet hole are formed in the two ends of the valve body respectively, the water inlet hole and the water outlet hole are both communicated with the spherical groove, and the valve element is arranged in the spherical groove. The first sealing ring is arranged at the connecting position of the end cover and the spherical groove, the third sealing ring is arranged at the connecting position of the water outlet hole and the spherical groove, it is guaranteed that the valve element is attached to the first sealing ring and the third sealing ring all the time when rotating, liquid is prevented from leaking from the connecting position of the end cover and the valve element, and the sealing effect is good; liquid is effectively prevented from leaking from the joint of the valve body and the upper cover, the sealing performance is good, the annular rubber ring is arranged in the annular groove of the valve rod, the upper cover is further sealed, the liquid is prevented from leaking from the mounting hole of the upper cover, and the sealing performance of the whole ball valve is high through all-dimensional multiple sealing.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and in particular to a ball valve with good sealing performance. Background Technology

[0002] A ball valve is a valve driven by a valve stem that rotates around the ball valve axis; it can also be used for fluid regulation and control. Among them, the hard-seal V-type ball valve has a strong shearing force between its V-shaped ball core and the metal valve seat with hard alloy overlay, making it particularly suitable for media containing fibers, small solid particles, etc.

[0003] In the structure of a ball valve, poor sealing between the valve body and the cover or top cover, as well as between the valve core and the valve body, can easily lead to leakage during use.

[0004] Therefore, it is necessary to provide a ball valve with good sealing performance to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a ball valve with good sealing performance to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a ball valve with good sealing performance, comprising a valve body and a top cover, the top cover being disposed on the valve body, a spherical groove being formed in the middle of the valve body, a valve core being disposed within the spherical groove, an inlet hole and an outlet hole being formed at both ends of the valve body respectively, the inlet hole and the outlet hole being connected to the spherical groove, an end cap being disposed within the inlet hole, a first sealing ring being disposed at the connection position between the end cap and the spherical groove, a third sealing ring being disposed at the connection position between the outlet hole and the spherical groove, the valve core having a spherical structure, and a connecting hole being formed in the middle of the valve core, the connecting hole being directly opposite the inlet hole and the outlet hole. Assume that the valve core is tightly abutted against the sidewalls of the first and third sealing rings at both ends, the valve core has a slot at its top, a valve stem is disposed in the slot, the valve body has a groove on its top surface, the groove is circular, a fourth sealing ring is disposed in the groove, the bottom of the top cover is pressed against the fourth sealing ring, the top of the top cover has a mounting hole, the top of the valve stem passes through the mounting hole and extends above the top cover, the valve stem has an annular groove on its outer circumference, an annular rubber ring is disposed in the annular groove, the annular rubber ring is fitted on the outer circumference of the valve stem, and the outer wall of the annular rubber ring is tightly abutted against the inner wall of the mounting hole of the top cover.

[0007] As a preferred technical solution of this utility model, the top of the upper cover is provided with a placement groove, the bottom of the placement groove is provided with a placement hole, a sealing filler is provided in the placement hole, the sealing filler is sleeved on the outer circumferential surface of the valve stem, a pressure sleeve is provided on the top of the sealing filler, the pressure sleeve is located in the placement hole and is sleeved on the outer circumferential surface of the valve stem.

[0008] As a preferred technical solution of this utility model, a butterfly spring is provided in the placement groove, the butterfly spring is located at the top of the pressure sleeve, and a pressure plate is also provided in the placement groove. The pressure plate is located on the top of the butterfly spring and is sleeved on the outer circumferential surface of the valve stem. The pressure plate is locked and fixed in the placement groove by screws.

[0009] As a preferred technical solution of this utility model, a butterfly spring is provided in the placement groove, the butterfly spring is located at the top of the pressure sleeve, and a pressure plate is also provided in the placement groove. The pressure plate is located on the top of the butterfly spring and is sleeved on the outer circumferential surface of the valve stem. The pressure plate is locked and fixed in the placement groove by screws.

[0010] As a preferred technical solution of this utility model, the bottom of the upper cover is provided with an annular groove, and the bottom of the annular groove is pressed against the fourth sealing ring.

[0011] As a preferred embodiment of this utility model, an anti-static device is provided inside the bottom side wall of the valve stem.

[0012] As a preferred embodiment of this utility model, a second sealing ring is provided between the end of the end cap away from the valve core and the valve body.

[0013] As a preferred technical solution of this utility model, the surface of the upper cover is provided with a plurality of through holes, and a bolt is provided in each of the plurality of through holes. The threaded part of the bolt passes through the through hole and is screwed into the threaded hole at the top of the valve body.

[0014] Beneficial effects

[0015] This utility model discloses a ball valve with good sealing performance. It features a first sealing ring at the connection between the end cap and the spherical groove, and a third sealing ring at the connection between the outlet and the spherical groove. This ensures the valve core remains in contact with the first and third sealing rings during rotation, preventing liquid leakage from the connection between the end cap and the valve core, resulting in a good sealing effect. A fourth sealing ring is provided in the groove of the valve body, effectively preventing liquid leakage through the connection between the valve body and the top cover, further enhancing sealing performance. An annular rubber ring is provided in the annular groove of the valve stem. The outer wall of the annular rubber ring automatically expands and tightly adheres to the inner wall of the mounting hole of the top cover, further sealing the top cover and preventing liquid leakage through the mounting hole. Through comprehensive multi-layer sealing, the entire ball valve achieves strong sealing performance. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0018] Figure 2This is a front view of the overall structure of this utility model;

[0019] Figure 3 This is a left view of the overall structure of this utility model.

[0020] In the diagram: 1. Valve body; 2. End cap; 3. Top cover; 4. Valve core; 5. First sealing ring; 6. Second sealing ring; 7. Third sealing ring; 8. Valve stem; 9. Fourth sealing ring; 10. Anti-static device; 11. Bolt; 12. Thrust washer; 13. Annular rubber ring; 14. Sealing packing; 15. Pressure sleeve; 16. Butterfly spring; 17. Pressure plate. Detailed Implementation

[0021] The embodiments of this utility model will now be described with reference to the accompanying drawings. In this process, to ensure clarity and convenience, we may exaggerate the width of lines or the size of constituent elements in the drawings.

[0022] Furthermore, the terms used below are defined based on the functions of this utility model and may vary depending on the user's or operator's intent or convention. Therefore, these terms are defined based on the entire contents of this specification.

[0023] like Figures 1 to 3 As shown, a ball valve with good sealing performance includes a valve body 1 and a top cover 3. The top cover 3 is disposed on the valve body 1. Multiple through holes are evenly distributed on the surface of the top cover 3. Bolts 11 are installed in each of the through holes. The threaded portion of the bolts 11 passes through the through holes and screws into a threaded hole at the top of the valve body 1. A spherical groove is formed in the middle of the valve body 1, and a valve core 4 is disposed within the spherical groove. Water inlet and water outlet holes are respectively formed at both ends of the valve body 1, and both the water inlet and water outlet holes communicate with the spherical groove. An end cap 2 is disposed within the water inlet hole, and the end cap 2 is connected to the spherical groove. A first sealing ring 5 is provided at the connection position, and a third sealing ring 7 is provided at the connection between the water outlet and the spherical groove. The valve core 4 has a spherical structure and a connecting hole is provided in the middle of the valve core 4. The connecting hole is opened directly opposite the water inlet and the water outlet. The two ends of the valve core 4 are respectively tightly attached to the side walls of the first sealing ring 5 and the third sealing ring 7 to ensure that the valve core 4 is always in contact with the first sealing ring 5 and the third sealing ring 7 when it rotates, preventing liquid from leaking from the connection between the end cap 2 and the valve core 4, and providing a good sealing effect. A second sealing ring 6 is provided between the end of the end cap 2 away from the valve core 4 and the valve body 1.

[0024] The valve core 4 has a slot at its top, and a valve stem 8 is installed in the slot. An anti-static device 10 is installed on the bottom side wall of the valve stem 8 for protection. The valve body 1 has a circular groove on its top surface, and a fourth sealing ring 9 is installed within the groove. The bottom of the upper cover 3 has an annular groove that presses against the fourth sealing ring 9, effectively preventing liquid leakage through the connection between the valve body 1 and the upper cover 3, resulting in good sealing performance. The upper cover 3 has a mounting hole at its top, and the top of the valve stem 8 passes through the mounting hole and extends above the upper cover 3. The valve stem 8 has a stepped shaft structure. A thrust pad 12 is provided at the connection between the stepped valve stem 8 and the mounting hole of the upper cover 3. The thrust pad 12 is fitted on the outer circumferential surface of the valve stem 8 to prevent the valve stem 8 from sliding upwards too far. An annular groove is formed on the outer circumferential surface of the valve stem 8, and an annular rubber ring 13 is provided in the annular groove. The annular rubber ring 13 is fitted on the outer circumferential surface of the valve stem 8, and the outer wall of the annular rubber ring 13 is in close contact with the inner wall of the mounting hole of the upper cover 3. The annular rubber ring 13 automatically expands and fits the inner wall of the mounting hole, further sealing the upper cover 3 and preventing liquid from leaking through the mounting hole of the upper cover 3. Through all-round multi-seal, the entire ball valve has strong sealing performance.

[0025] The top of the upper cover 3 has a placement groove, and the bottom of the placement groove has a placement hole. A sealing filler 14 is placed in the placement hole and is fitted onto the outer circumferential surface of the valve stem 8. A pressure sleeve 15 is placed on top of the sealing filler 14 and is located in the placement hole and fitted onto the outer circumferential surface of the valve stem 8. A butterfly spring 16 is placed in the placement groove and is located on top of the pressure sleeve 15. A pressure plate 17 is also placed in the placement groove and is located on top of the butterfly spring 16 and fitted onto the outer circumferential surface of the valve stem 8. The pressure plate 17 is locked and fixed in the placement groove by screws.

[0026] Specifically, the implementation method involves setting a first sealing ring 5 at the connection between the end cap 2 and the spherical groove, and setting a third sealing ring 7 at the connection between the water outlet and the spherical groove. This ensures that the valve core 4 is always in contact with the first sealing ring 5 and the third sealing ring 7 when it rotates, preventing liquid leakage from the connection between the end cap 2 and the valve core 4, resulting in a good sealing effect. A fourth sealing ring 9 is set in the groove of the valve body 1, which effectively prevents liquid leakage through the connection between the valve body 1 and the upper cover 3, resulting in good sealing performance. An annular rubber ring 13 is set in the annular groove of the valve stem 8. The outer wall of the annular rubber ring 13 automatically expands and tightly adheres to the inner wall of the mounting hole of the upper cover 3, further sealing the upper cover 3 and preventing liquid leakage through the mounting hole of the upper cover 3. Through comprehensive and multi-layer sealing, the entire ball valve has a strong sealing performance.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A ball valve with good sealing performance, comprising a valve body (1) and a top cover (3), wherein the top cover (3) is disposed on the valve body (1), characterized in that: The valve body (1) has a spherical groove in the middle, and a valve core (4) is installed in the spherical groove. The valve body (1) has an inlet hole and an outlet hole at both ends, which are connected to the spherical groove. An end cap (2) is installed in the inlet hole. A first sealing ring (5) is installed at the connection between the end cap (2) and the spherical groove. A third sealing ring (7) is installed at the connection between the outlet hole and the spherical groove. The valve core (4) is spherical in structure, and a connecting hole is opened in the middle of the valve core (4). The connecting hole is opened directly opposite the inlet hole and the outlet hole. The two ends of the valve core (4) are respectively close to the side walls of the first sealing ring (5) and the third sealing ring (7). 4) A slot is provided at the top, and a valve stem (8) is provided in the slot. A groove is provided on the top surface of the valve body (1). The groove is circular and a fourth sealing ring (9) is provided in the groove. The bottom of the upper cover (3) is pressed on the fourth sealing ring (9). An installation hole is provided at the top of the upper cover (3). The top of the valve stem (8) passes through the installation hole and extends above the upper cover (3). An annular groove is provided on the outer circumference of the valve stem (8). An annular rubber ring (13) is provided in the annular groove. The annular rubber ring (13) is fitted on the outer circumference of the valve stem (8), and the outer wall of the annular rubber ring (13) is in close contact with the inner wall of the installation hole of the upper cover (3).

2. The ball valve with good sealing performance according to claim 1, characterized in that: The top of the cover (3) is provided with a placement groove, and the bottom of the placement groove is provided with a placement hole. A sealing packing (14) is provided in the placement hole. The sealing packing (14) is sleeved on the outer circumferential surface of the valve stem (8). A pressure sleeve (15) is provided on the top of the sealing packing (14). The pressure sleeve (15) is located in the placement hole and is sleeved on the outer circumferential surface of the valve stem (8).

3. A ball valve with good sealing performance according to claim 2, characterized in that: A butterfly spring (16) is provided in the placement groove. The butterfly spring (16) is located at the top of the pressure sleeve (15). A pressure plate (17) is also provided in the placement groove. The pressure plate (17) is located at the top of the butterfly spring (16) and is sleeved on the outer circumference of the valve stem (8). The pressure plate (17) is locked and fixed in the placement groove by screws.

4. A ball valve with good sealing performance according to claim 1, characterized in that: The valve stem (8) has a stepped shaft structure. A thrust pad (12) is provided at the connection between the steps of the valve stem (8) and the mounting hole of the upper cover (3). The thrust pad (12) is sleeved on the outer circumference of the valve stem (8).

5. A ball valve with good sealing performance according to claim 1, characterized in that: The bottom of the upper cover (3) is provided with an annular groove, and the bottom of the annular groove is pressed against the fourth sealing ring (9).

6. A ball valve with good sealing performance according to claim 1, characterized in that: An anti-static device (10) is provided inside the bottom side wall of the valve stem (8).

7. A ball valve with good sealing performance according to claim 1, characterized in that: A second sealing ring (6) is provided between the end cap (2) away from the valve core (4) and the valve body (1).

8. A ball valve with good sealing performance according to claim 1, characterized in that: The upper cover (3) has multiple through holes evenly distributed on its surface. Each of the multiple through holes is provided with a bolt (11). The threaded part of the bolt (11) passes through the through hole and is screwed into the threaded hole at the top of the valve body (1).

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