Low flow rate anti-wear ball valve

Abstract

The present invention discloses a low-flow-rate anti-wear ball valve, which relates to the technical field of ball valves. The present invention includes a main structure, a mounting structure, a connecting structure, an adjusting structure, a first sealing structure and a second sealing structure. The main structure includes a valve body and an end cover, the upper surface of the end cover is connected to the lower surface of the valve body, the mounting structure includes a hexagonal full-thread bolt, and the hexagonal full-thread bolt is installed on the inner surface of the end cover, and the connecting structure includes a side body and a second O-ring, and the side body is installed on the outer surface of the valve body. The inlet valve seat and the outlet valve seat of the present invention are each provided with two seals. When the seal of the inlet valve seat fails, the outlet valve seat provides the valve seal. When the valve is completely closed at the inlet end, a certain flow channel can still be maintained at the outlet end to ensure that it is not flushed by the upstream medium. Since the flow area of ​​the inlet valve seat flow channel is smaller than the outlet flow channel area, it can effectively reduce the medium flow rate in actual application and delay the valve seat from being damaged by the high-speed medium.

Description

Technical Field

[0001] The invention belongs to the technical field of ball valves, and in particular relates to a high-flow-rate (low-flow-rate) anti-wear ball valve for media. Background Art

[0002] Ball valves, whose opening and closing parts are driven by the valve stem and rotate around the axis of the ball valve, can also be used for fluid regulation and control. Among them, the hard-sealed V-type ball valve has a strong shear force between its V-shaped ball core and the metal valve seat with welded cemented carbide, which is particularly suitable for media containing fibers, tiny solid particles, etc. Multi-way ball valves can not only flexibly control the confluence, diversion, and flow direction switching of the media in the pipeline, but also close any channel and connect the other two channels.

[0003] Existing ball valves are often easily damaged during use due to the internal high-speed flow of medium eroding the valve seat, resulting in poor wear resistance and short service life of the ball valve. In addition, the ball valve has low sealing performance and the medium is easy to flow out. For this reason, we propose a low-flow anti-wear ball valve. Summary of the Invention

[0004] The object of the present invention is to provide a low-flow-rate anti-wear ball valve to solve the problems of damage to the existing valve seat caused by high-speed medium erosion and poor sealing effect inside the ball valve.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a low-flow anti-wear ball valve, comprising a main structure, a mounting structure, a connecting structure, an adjusting structure, a first sealing structure and a second sealing structure, wherein the main structure comprises a valve body and an end cover, the upper surface of the end cover is connected to the lower surface of the valve body, the mounting structure comprises a hexagon socket full-thread bolt, the hexagon socket full-thread bolt is mounted on the inner surface of the end cover, the connecting structure comprises a side body and a second O-ring, the side body is mounted on the outer surface of the valve body, the upper surface of the second O-ring is connected to the lower surface of the valve body, the adjusting structure comprises an upper valve stem, a second shaft sleeve and a ball, the first Two sleeves are installed on the outer surface of the upper valve stem, and one end of the upper valve stem is connected to the outer surface of the sphere. The first sealing structure includes an inlet valve seat, a first inlet sealing ring and a second inlet sealing ring. The inlet valve seat is installed in the inner cavity of the valve body, and the inlet valve seat and the sphere are matched with each other. A mounting port is provided on one side surface of the inlet valve seat, and the second inlet sealing ring is connected to the mounting port. The lower surface of the first inlet sealing ring is connected to the upper surface of the second inlet sealing ring. The second sealing structure includes an outlet valve seat, which is installed in the inner cavity of the valve body and matches the sphere.

[0007] Preferably, the main structure also includes a lower valve stem and a third sleeve. The lower surface of the valve body is provided with a mounting hole. The lower valve stem is connected to the mounting hole. The third sleeve is installed on the outer surface of the lower valve stem, wherein the third sleeve plays a role in protecting the lower valve stem and reducing wear.

[0008] Preferably, the mounting structure further includes a first gasket, a first O-ring, a stud bolt and a hexagonal nut, wherein the lower surface of the first gasket is connected to the upper surface of the end cover, and several of the first O-rings are installed on the inner surface of the valve body, and the hexagonal nut, wherein the hexagonal nut plays the role of rotating with the stud bolt, and then plays the role of fixing the structural component.

[0009] Preferably, the connection structure also includes a second gasket, a packing gland, a third O-ring, a first hexagon socket bolt, a stop gasket and a handle. The second gasket, the packing gland and the third O-ring are all installed on the outside of the upper valve stem. The upper surface of the stop gasket is connected to the lower surface of the handle. The upper surface of the valve body is provided with a mounting port, and the first hexagon socket bolt is connected to the mounting port. The third O-ring serves as a protective structure.

[0010] Preferably, the adjustment structure also includes a fourth O-ring, a second hexagon socket bolt and a first sleeve, the fourth O-ring is installed on the outer surface of the second sleeve, the upper surface of the valve body is provided with a mounting groove, the second hexagon socket bolt is connected to the mounting groove, and the first sleeve is installed on the outside of the second hexagon socket bolt, wherein the second hexagon socket bolt plays a fixing role.

[0011] Preferably, the first sealing structure also includes a fifth O-ring and an inlet cap, the upper surface of the inlet cap is connected to the inner surface of the valve body, several of the fifth O-rings are installed between the valve body and the inlet valve seat, and a first spring is provided on one side of the inlet valve seat, wherein the inlet cap plays the role of sealing connection.

[0012] Preferably, the second sealing structure also includes a sixth O-ring, a second spring, a first outlet sealing ring, a second outlet sealing ring and an outlet cap, one end of the second spring is connected to one side of the outlet valve seat, the upper surface of the outlet valve seat is provided with a ring groove, the sixth O-ring is connected to the ring groove, one side surface of the first outlet sealing ring is connected to one side surface of the outlet valve seat, the upper surface of the second outlet sealing ring is connected to the lower surface of the first outlet sealing ring, and the lower surface of the outlet cap is connected to the upper surface of the outlet valve seat, wherein the second spring plays a role in generating a pre-tightening force. After pre-sealing, a pressure difference is generated before and after the valve seat structure, so that the valve seat body is further pressed against the ball, and the pre-tightening force and pressure difference are used to achieve a complete sealing effect.

[0013] The present invention has the following beneficial effects:

[0014] 1. The inlet valve seat and the outlet valve seat of the present invention are each provided with two seals. When the seal of the inlet valve seat fails, the outlet valve seat provides the valve seal. When the valve is completely closed at the inlet end, a certain flow channel can still be maintained at the outlet end to ensure that it is not eroded by the upstream medium. Since the flow channel flow area of ​​the inlet valve seat is smaller than the outlet flow channel area, it can effectively reduce the medium flow rate in actual application and delay the valve seat from being damaged by the high-speed medium.

[0015] 2. When the ball of the present invention rotates 70 degrees, the inlet seal is close to closed, and the outlet sealing surface still maintains a certain flow area, which further illustrates that the outlet seal flow area is much larger than the inlet sealing surface, thereby effectively preventing high-velocity media from damaging the valve seat.

[0016] 3. The present invention utilizes a spring to generate a preload force, and the pressure difference before and after the valve seat is further expanded, pushing the second sealing ring close to the ball, thereby achieving a sealing effect. The spring preload force is utilized to achieve complete sealing. After complete sealing, it no longer moves closer to the ball, and the sealing effect is good.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic structural diagram of a low-flow-rate anti-wear ball valve according to the present invention from a first perspective;

[0020] Figure 2 This is a schematic structural diagram of the low-flow-rate anti-wear ball valve according to the present invention from a second perspective;

[0021] Figure 3 This is a schematic diagram of the internal structure of the low-flow anti-wear ball valve of the present invention when the ball is rotated 70 degrees;

[0022] Figure 4 For the present invention Figure 2 A partial enlarged view of the middle part;

[0023] Figure 5 For the present invention Figure 2 A partial enlarged view of point B in the middle.

[0024] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0025] 100, main structure; 110, valve body; 120, end cover; 130, lower valve stem; 140, third shaft sleeve; 200, mounting structure; 210, hexagon socket head cap screw; 220, first gasket; 230, first O-ring; 240, stud bolt; 250, hexagonal nut; 300, connecting structure; 310, side body; 320, second O-ring; 330, second gasket; 340, packing gland; 350, third O-ring; 360, first hexagon socket head cap screw; 370, stop washer; 380, handle; 400, adjustment structure; 410, upper valve stem; 420, second bushing; 430, ball; 440, fourth O-ring; 450, second hexagon socket bolt; 460, first bushing; 500, first sealing structure; 510, inlet valve seat; 520, first inlet sealing ring; 530, second inlet sealing ring; 540, fifth O-ring; 550, inlet vent; 600, second sealing structure; 610, outlet valve seat; 620, sixth O-ring; 630, second spring; 640, first outlet sealing ring; 650, second outlet sealing ring; 660, outlet vent. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner", "lower", "all around" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0028] See also Figure 1-5As shown, the present invention is a low-flow anti-wear ball valve, including a main structure 100, a mounting structure 200, a connecting structure 300, an adjusting structure 400, a first sealing structure 500 and a second sealing structure 600. The main structure 100 includes a valve body 110 and an end cover 120. The upper surface of the end cover 120 is connected to the lower surface of the valve body 110. The mounting structure 200 includes a hexagon socket full-thread bolt 210. The hexagon socket full-thread bolt 210 is installed on the inner surface of the end cover 120. The connecting structure 300 includes a side body 310 and a second O-ring 320. The side body 310 is installed on the outer surface of the valve body 110. The upper surface of the second O-ring 320 is connected to the lower surface of the valve body 110. The adjusting structure 400 includes an upper valve stem 410, a second shaft sleeve 420 and a and the ball 430, the second sleeve 420 is installed on the outer surface of the upper valve stem 410, one end of the upper valve stem 410 is connected to the outer surface of the ball 430, the first sealing structure 500 includes an inlet valve seat 510, a first inlet sealing ring 520 and a second inlet sealing ring 530, the inlet valve seat 510 is installed in the inner cavity of the valve body 110, the inlet valve seat 510 and the ball 430 match each other, a mounting port is provided on one side surface of the inlet valve seat 510, the second inlet sealing ring 530 is connected to the mounting port, the lower surface of the first inlet sealing ring 520 is connected to the upper surface of the second inlet sealing ring 530, the second sealing structure 600 includes an outlet valve seat 610, the outlet valve seat 610 is installed in the inner cavity of the valve body 110, and the outlet valve seat 610 matches the ball 430.

[0029] Furthermore, the main structure 100 also includes a lower valve stem 130 and a third sleeve 140. The lower surface of the valve body 110 is provided with a mounting hole, the lower valve stem 130 is connected to the mounting hole, and the third sleeve 140 is installed on the outer surface of the lower valve stem 130, wherein the third sleeve 140 plays a role in protecting the lower valve stem 130 and reducing wear.

[0030] Furthermore, the mounting structure 200 also includes a first gasket 220, a first O-ring 230, a stud bolt 240 and a hexagonal nut 250. The lower surface of the first gasket 220 is connected to the upper surface of the end cover 120. Several first O-rings 230 are installed on the inner surface of the valve body 110, and the hexagonal nut 250, wherein the hexagonal nut 250 plays the role of rotating with the stud bolt 240, and then plays the role of fixing the structural component.

[0031] Furthermore, the connection structure 300 also includes a second gasket 330, a packing gland 340, a third O-ring 350, a first hexagon socket bolt 360, a stop gasket 370 and a handle 380. The second gasket 330, the packing gland 340 and the third O-ring 350 are all installed on the outside of the upper valve stem 410. The upper surface of the stop gasket 370 is connected to the lower surface of the handle 380. The upper surface of the valve body 110 is provided with a mounting port, and the first hexagon socket bolt 360 is connected to the mounting port. Among them, the third O-ring 350 plays the role of a protective structure.

[0032] Furthermore, the adjustment structure 400 also includes a fourth O-ring 440, a second hexagon socket bolt 450 and a first sleeve 460. The fourth O-ring 440 is installed on the outer surface of the second sleeve 420. The upper surface of the valve body 110 is provided with a mounting groove. The second hexagon socket bolt 450 is connected to the mounting groove. The first sleeve 460 is installed on the outside of the second hexagon socket bolt 450, wherein the second hexagon socket bolt 450 plays a fixing role.

[0033] Furthermore, the first sealing structure 500 also includes a fifth O-ring 540 and an inlet cap 550. The upper surface of the inlet cap 550 is connected to the inner surface of the valve body 110. Several fifth O-rings 540 are installed between the valve body 110 and the inlet valve seat 510. A first spring is provided on one side of the inlet valve seat 510, wherein the inlet cap 550 plays the role of a sealing connection.

[0034] Furthermore, the second sealing structure 600 also includes a sixth O-ring 620, a second spring 630, a first outlet sealing ring 640, a second outlet sealing ring 650 and an outlet cap 660. One end of the second spring 630 is connected to one side of the outlet valve seat 610. The upper surface of the outlet valve seat 610 is provided with a ring groove. The sixth O-ring 620 is connected to the ring groove. One side surface of the first outlet sealing ring 640 is connected to one side surface of the outlet valve seat 610. The upper surface of the second outlet sealing ring 650 is connected to the lower surface of the first outlet sealing ring 640. The lower surface of the outlet cap 660 is connected to the upper surface of the outlet valve seat 610. Among them, the second spring 630 plays a role in generating a pre-tightening force. After pre-sealing, a pressure difference is generated before and after the valve seat structure, so that the valve seat body is further pressed against the ball 430, and the pre-tightening force and pressure difference are used to achieve a complete sealing effect.

[0035] The following is the working principle of the present invention:

[0036] See also Figure 1-5As shown, the present invention is a low flow rate anti-wear ball valve, and its use method is as follows: the inlet valve seat 510 and the outlet valve seat 610 clamp the ball 430, and in the body cavity of the valve body 110, the torque is input through the upper valve stem 410 and the lower valve stem 130 to drive the ball 430 to rotate, thereby achieving the purpose of connecting and closing the flow channel. The flow channel axis of the valve ball 430 coincides with the valve body 110, and the axes of the upper valve stem 410 and the lower valve stem 130 are perpendicular to the flow channel axis. The channel in the ball 430 is divided into two parts, which are connected to the inlet and outlet valves respectively. The sealing surfaces of the inlet valve seat 510 and the outlet valve seat 610 match each other. The inlet valve seat 510 and the outlet valve seat 610 are each provided with two seals. When the seal of the inlet valve seat 510 fails, the outlet valve seat 610 provides the valve seal. When the valve is completely closed at the inlet end, a certain flow channel can still be maintained at the outlet end to ensure that it is not eroded by the upstream medium. Since the flow channel flow area of ​​the inlet valve seat 510 is smaller than the outlet flow channel area, it can effectively reduce the medium flow rate in actual application and delay the valve seat from being damaged by the high-speed medium.

[0037] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0038] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. Low flow rate anti-wear ball valve, characterized by: The invention comprises a main structure (100), a mounting structure (200), a connecting structure (300), an adjusting structure (400), a first sealing structure (500) and a second sealing structure (600), wherein the main structure (100) comprises a valve body (110) and an end cover (120), wherein the upper surface of the end cover (120) is connected to the lower surface of the valve body (110), the mounting structure (200) comprises a hexagon socket full-thread bolt (210), and the hexagon socket full-thread bolt (210) is mounted on the inner surface of the end cover (120), the connecting structure (300) comprises a side body (310) and a second O-ring (320), wherein the side body (310) is mounted on the outer surface of the valve body (110), and the upper surface of the second O-ring (320) is connected to the lower surface of the valve body (110), and the adjusting structure (400) comprises an upper valve stem (410), a second shaft sleeve (420) and a ball (430). The second sleeve (420) is mounted on the outer surface of the upper valve stem (410), one end of the upper valve stem (410) is connected to the outer surface of the ball (430), the first sealing structure (500) includes an inlet valve seat (510), a first inlet sealing ring (520) and a second inlet sealing ring (530), the inlet valve seat (510) is mounted in the inner cavity of the valve body (110), the inlet valve seat (510) and the ball (430) are matched with each other, a mounting port is provided on one side surface of the inlet valve seat (510), the second inlet sealing ring (530) is connected to the mounting port, the lower surface of the first inlet sealing ring (520) is connected to the upper surface of the second inlet sealing ring (530), the second sealing structure (600) includes an outlet valve seat (610), the outlet valve seat (610) is mounted in the inner cavity of the valve body (110), and the outlet valve seat (610) is matched with the ball (430); The main structure (100) further includes a lower valve stem (130) and a third shaft sleeve (140); a mounting hole is provided on the lower surface of the valve body (110); the lower valve stem (130) is connected to the mounting hole; and the third shaft sleeve (140) is mounted on the outer surface of the lower valve stem (130); The mounting structure (200) further comprises a first gasket (220), a first O-ring (230), a stud bolt (240) and a hexagonal nut (250); the lower surface of the first gasket (220) is connected to the upper surface of the end cover (120); and a plurality of the first O-rings (230) are mounted on the inner surface of the valve body (110).

2. The low-flow anti-wear ball valve according to claim 1, characterized in that: The connection structure (300) further includes a second gasket (330), a packing gland (340), a third O-ring (350), a first hexagon socket bolt (360), a stop gasket (370) and a handle (380). The second gasket (330), the packing gland (340) and the third O-ring (350) are all installed on the outside of the upper valve stem (410). The upper surface of the stop gasket (370) is connected to the lower surface of the handle (380). The upper surface of the valve body (110) is provided with a mounting port, and the first hexagon socket bolt (360) is connected to the mounting port.

3. The low-flow anti-wear ball valve according to claim 1, characterized in that: The regulating structure (400) further includes a fourth O-ring (440), a second hexagon socket bolt (450) and a first sleeve (460), wherein the fourth O-ring (440) is mounted on the outer surface of the second sleeve (420), an upper surface of the valve body (110) is provided with a mounting groove, the second hexagon socket bolt (450) is connected to the mounting groove, and the first sleeve (460) is mounted on the outside of the second hexagon socket bolt (450).

4. The low-flow anti-wear ball valve according to claim 1, characterized in that: The first sealing structure (500) further includes a fifth O-ring (540) and an inlet cap (550), wherein the upper surface of the inlet cap (550) is connected to the inner surface of the valve body (110), and a plurality of the fifth O-rings (540) are installed between the valve body (110) and the inlet valve seat (510), and a first spring is provided on one side of the inlet valve seat (510).

5. The low-flow anti-wear ball valve according to claim 1, characterized in that: The second sealing structure (600) further includes a sixth O-ring (620), a second spring (630), a first outlet sealing ring (640), a second outlet sealing ring (650) and an outlet cap (660), one end of the second spring (630) is connected to one side of the outlet valve seat (610), a ring groove is provided on the upper surface of the outlet valve seat (610), the sixth O-ring (620) is connected to the ring groove, one side surface of the first outlet sealing ring (640) is connected to one side surface of the outlet valve seat (610), the upper surface of the second outlet sealing ring (650) is connected to the lower surface of the first outlet sealing ring (640), and the lower surface of the outlet cap (660) is connected to the upper surface of the outlet valve seat (610).

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