Anti-adsorption fixed ball valve

Abstract

The invention relates to an anti-adsorption fixed ball valve which comprises a valve body, a ball core, a valve cover and a medium channel, the valve cover is connected to the valve body and matched with the valve body to define a valve cavity, the ball core is arranged in the valve cavity, the medium channel is connected with the valve cavity, a valve seat is further arranged at an inner side port of the medium channel, the ball core is provided with an outer spherical surface, and the valve seat is provided with a sealing matching surface. The sealing matching surface is matched and sealed with the outer spherical surface, an anti-adsorption annular groove is further formed in the sealing matching surface of the valve seat, the center line of the valve seat serves as the axis of the anti-adsorption annular groove, and at least one circle of anti-adsorption annular groove is formed in the valve seat. The anti-adsorption fixed ball valve can effectively prevent normal opening and closing of the valve from being affected by adsorption of the ball core and the valve seat, and solves the problems of unsmooth opening and closing, blockage, shaking and the like of the valve caused by adsorption of the ball core and the valve seat, so that the service life of the valve can be prolonged. The anti-adsorption fixed ball valve structure can be widely applied to fixed ball valves of high-frequency switches or other types of fixed ball valves.

Description

Technical Field

[0001] The present invention relates to a trunnion mounted ball valve. Background Art

[0002] During high-frequency switching, the valve seat and ball core of a trunnion-mounted ball valve are prone to sticking and locking, which can cause the valve to jam. Especially in low-pressure liquid applications, a wide seat seal can extend the life of the valve seat. However, in this case, the seat and ball core are closely aligned, making them more susceptible to sticking and causing valve switching problems. Furthermore, during switching, the valve chamber of a trunnion-mounted ball valve is prone to blockage, which can affect its normal operation. Summary of the Invention

[0003] In view of the technical problems existing in the background technology, the present invention aims to provide an anti-adsorption fixed ball valve.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: an anti-adsorption fixed ball valve, including a valve body, a ball core, a valve cover and a medium channel, the valve cover is connected to the valve body and cooperates to form a valve cavity, the ball core is arranged in the valve cavity, the medium channel is connected to the valve cavity, and a valve seat is also provided at the inner port of the medium channel. The ball core has an outer spherical surface, and the valve seat has a sealing mating surface, and the sealing mating surface cooperates with the outer spherical surface for sealing. It is characterized in that: an anti-adsorption annular groove is also provided on the sealing mating surface of the valve seat, the anti-adsorption annular groove takes the center line of the valve seat as the axis, and the anti-adsorption annular groove on the valve seat is provided with at least one circle.

[0005] The following various optimizations or supplementary explanations can be made on the above technical solutions respectively.

[0006] The ball core is also connected to a valve stem; and a medium flow channel is also provided on the ball core.

[0007] In addition, it is optimized that the valve cavity is further provided with an inner lining cavity filling component, the inner lining cavity filling component is arranged outside the ball core and the inner lining cavity filling component has a valve stem avoidance opening.

[0008] For example, the liner cavity-filling component includes a left liner and a right liner.

[0009] For example, the valve stem includes an upper rod and a lower rod, the upper end of the ball core is connected to the upper rod, and the lower end of the ball core is connected to the lower rod; even, the valve stem and the ball core can adopt an integrated structure, and the upper rod and the lower rod are coaxially arranged.

[0010] Among them, a valve stem seat is also installed on the upper part of the valve body, and the valve stem seat is located on the upper side of the valve cavity. An upper shaft sleeve is set on the valve stem seat for cooperating with the operation of the valve stem, and a lower shaft sleeve is set on the lower part of the valve body for cooperating with the operation of the valve stem.

[0011] In addition, the connection between the valve stem and the ball core is set as a sleeve limiting boss, and the sleeve limiting boss is provided with a grinding avoidance annular groove for grinding the outer spherical surface of the ball core. The grinding avoidance annular groove has the center line of the valve stem as the axis; the sleeve limiting boss is set in the valve cavity.

[0012] After further optimization, a first recess is provided on the lower side of the valve stem seat, the upper sleeve is arranged in the first recess, the lower side of the upper sleeve is a sleeve limiting boss, a second recess is provided on the lower part of the valve body, the lower sleeve is arranged in the second recess, and the upper side of the lower sleeve is a sleeve limiting boss.

[0013] In addition, the valve cover includes a left cover and a right cover. The left cover is connected to the left side of the valve body, and the right cover is connected to the right side of the valve body. Medium channels are respectively provided on the left cover and the right cover, and the valve seats are respectively arranged at the inner ports of the left cover and the right cover; the left cover and the valve body, as well as the right cover and the valve body, are locked and connected by fasteners.

[0014] In addition, the outer ring of the valve seat is provided with an outer conical surface, which is located at the inner end of the valve seat. The left liner and the right liner respectively have through holes for the ball core to be exposed and contact the valve seat. The inner side of the through hole has an inner contact surface, which fits and abuts against the outer spherical surface of the ball core. The outer side of the through hole has an inner conical surface, which fits and abuts against the outer conical surface of the valve seat.

[0015] The beneficial effects of the present invention are that the anti-adsorption fixed ball valve can effectively prevent the ball core from adsorbing against the valve seat, which can affect the normal opening and closing of the valve. This overcomes problems such as valve opening and closing irregularities, jamming, and jitter caused by adsorption between the ball core and the valve seat, thereby also extending the service life of the valve. This anti-adsorption fixed ball valve structure can be widely used in high-frequency switching fixed ball valves or other types of fixed ball valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following describes the details and working principles of the implementation manner and embodiments of the present invention in conjunction with the accompanying drawings.

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 for Figure 1 A schematic diagram of the structure of the actuator and the lining cavity filling components is provided.

[0019] Figure 3 for Figure 1 Schematic diagram of the structure of the middle ball core and valve stem.

[0020] Figure 4 for Figure 1 Schematic diagram of the structure of the valve seat on one side.

[0021] Figure 5 for Figure 4 A magnified view of the middle structure.

[0022] Figure 6 for Figure 2 Schematic diagram of the middle part structure.

[0023] Figure 7 for Figure 2 Schematic diagram of the structure of the middle lining cavity filling component.

[0024] Figure 8 for Figure 7 Top view.

[0025] Figure 9 It is a structural schematic diagram of the mutual grinding between the valve seat and the ball core in the present invention.

[0026] In the picture: 1. Valve body; 10. Actuator; 13. Second notch; 2. Core; 20. Outer spherical surface; 21. Medium flow channel; 3. Valve cover; 31. Left cover; 32. Right cover; 33. Pressure spring; 4. Medium channel; 5. Valve chamber; 6. Valve seat; 60. Sealing surface; 61. Anti-adsorption annular groove; 62. Outer cone surface; 7. Valve stem; 71. Upper rod; 72. Lower rod; 73. Bushing limiting boss; 74. Grinding avoidance annular groove; 8. Liner cavity filling component; 80. Valve stem avoidance port; 81. Left lining; 82. Right lining; 84. Through hole; 85. Inner contact surface; 86. Inner conical surface; 9. Valve stem seat; 91. Upper shaft sleeve; 92. Lower shaft sleeve; 93. First notch. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the implementation of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] Referring to the accompanying drawings, the anti-adsorption fixed ball valve in the embodiment of this embodiment includes a valve body 1, a ball core 2, a valve cover 3, and a media channel 4. The valve cover 3 is connected to the valve body 1 and together form a valve cavity 5. The ball core 2 is disposed in the valve cavity 5, and the media channel 4 is connected to the valve cavity 5. The media channel 4 allows the normal flow of media through the valve. A valve seat 6 is also provided at the inner end of the media channel 4. The valve seat 6 has a sealing mating surface 60. The ball core 2 has an outer spherical surface 20. The outer spherical surface 20 of the ball core 2 and the sealing mating surface 60 of the valve seat 6 (typically an annular mating surface, such as an annular spherical curved surface) cooperate to seal with each other, so that the ball core 2 can cooperate with the valve to open and close and / or adjust the flow rate during operation in the valve cavity 5. The sealing between the outer spherical surface 20 and the sealing mating surface 60 of the valve seat 6 is conventional and mature technology.

[0029] In this anti-adsorption fixed ball valve, in order to avoid the valve seat 6 and the ball core 2 from being adsorbed and stuck together, the following optimization will be carried out. An anti-adsorption annular groove 61 is also provided on the sealing mating surface 60 of the valve seat 6, wherein the anti-adsorption annular groove 61 takes the center line of the valve seat 6 as the axis. The valve seat 6 is usually an annular structure, and the center line (or axis line) of the valve seat 6 is the axis (or axis line) of the anti-adsorption annular groove 61. The anti-adsorption annular groove 61 on the valve seat 6 is provided with at least one circle, usually only one circle is sufficient, and of course two, three or more circles can also be provided according to needs.

[0030] Its working principle is that the ball core 2 (or valve core, sphere, etc.) is arranged in the valve cavity 5 and cooperates with the valve seat 6 to control the valve. The outer spherical surface 20 of the ball core 2 and the sealing mating surface 60 of the valve seat 6 are in a close-fitting and sealed state, and an anti-adsorption annular groove 61 is provided on the sealing mating surface 60 of the valve seat 6, which effectively avoids the problems of switching abnormalities, jamming, and jitter caused by the adsorption and biting between the outer spherical surface 20 and the sealing mating surface 60 between the ball core 2 and the valve seat 6.

[0031] The anti-adsorption fixed ball valve can effectively prevent the adsorption of the ball core 2 and the valve seat 6 from affecting the normal opening and closing of the valve, and overcome the problems of valve opening and closing irregularities, jamming, and shaking caused by the adsorption between the ball core and the valve seat 6, thereby also improving the service life of the valve.

[0032] The anti-adsorption fixed ball valve structure can be widely used in high-frequency switching fixed ball valves or other types of fixed ball valves.

[0033] The following optimization or further explanation may be performed based on the above embodiments.

[0034] The ball core 2 is also connected to a valve stem 7. The valve stem 7 is operated (e.g., by an actuator 10) to drive the ball core 2 in the valve cavity 5. The valve stem 7 also supports the ball core 2 in the valve cavity 5. A medium flow channel 21 is also provided on the ball core 2 to facilitate the passage of medium through the ball core 2 when the valve is opened during the operation of the ball core 2. This is a conventional and mature technology.

[0035] The two walls of the anti-adsorption annular groove 61 of the valve seat 6 can be perpendicular to each other. One wall forms a radial annular groove with the valve seat axis as its central axis, while the other wall forms an axial annular groove with the valve seat axis as its central axis. This structure is relatively easy to manufacture, and the angles between the walls can be rounded. The anti-adsorption annular groove 61 divides the sealing mating surface 60 of the valve seat 6 into two, forming two seals and improving the sealing performance between the valve seat and the ball. Furthermore, during the opening and closing of the ball, the medium enters the anti-adsorption annular groove 61, effectively resolving the problem of adsorption between the valve seat and the ball caused by the grinding and matching of the two. This prevents the generation of additional torque during the valve opening and closing process (especially under low-pressure conditions), and prevents valve operation jitter and jamming.

[0036] In addition, the valve cavity 5 is further optimized and provided with an inner lining filling component 8. The inner lining filling component 8 is provided outside the ball core 2 and has a valve stem avoidance opening 80. The valve stem avoidance opening 80 allows the valve stem 7 to pass smoothly without affecting the connection with the ball core 2. The inner lining filling component 8 can fill the area outside (outside) the ball core 2 in the valve cavity 5, reducing the risk of medium accumulation in this area, effectively avoiding medium clogging this area, avoiding accumulation of material in this area and affecting the normal operation of the ball core 2, ensuring smooth opening and closing of the valve. Among them, the inner lining filling component can also provide additional support outside (outside) the ball core 2 in the valve cavity 5, playing the role of additional auxiliary support for the ball core 2, making the ball core 2 run more stably, thereby also improving the service life of the valve. For example, the inner lining filling component is better provided with a spherical surface support against the inner side of the ball core 2.

[0037] For example, the liner component 8 includes a left liner 81 and a right liner 82. The left-right structure facilitates assembly within the valve. For example, the left liner 81 and the right liner 82 can be split left and right. The liner component 8 can be made of an engineering plastic (such as polytetrafluoroethylene (PTFE)) with a relatively low friction coefficient; other materials can also be used as needed.

[0038] Furthermore, the valve stem 7 comprises an upper stem 71 and a lower stem 72. The upper end of the ball core 2 is connected to the upper stem 71, while the lower end of the ball core 2 is connected to the lower stem 72. Furthermore, the valve stem 7 and the ball core 2 are integrally formed, providing greater structural stability. The upper stem 71 and the lower stem 72 are coaxially arranged.

[0039] Among them, a valve stem seat 9 is also installed on the upper part of the valve body 1, and the valve stem seat 9 is located on the upper side of the valve cavity 5. The valve stem seat 9 is used to cooperate with the valve stem (such as its upper rod 71) for assembly (corresponding packing structure, etc. can be set, which is a mature technology). In addition, an upper shaft sleeve 91 is provided on the valve stem seat 9 for cooperating with the operation of the valve stem 7. For example, the upper shaft sleeve 91 can allow the upper rod 71 to pass through so as to support the operation of the upper rod 71. The lower part of the valve body 1 is provided with a lower shaft sleeve 92 for cooperating with the operation of the valve stem. For example, the lower shaft sleeve 92 can allow the lower rod 72 to pass through so as to support the operation of the lower rod 72.

[0040] In addition, the connection between the valve stem 7 and the ball core 2 is provided with a sleeve limiting boss 73. The sleeve limiting boss 73 is disposed within the valve cavity 5. The sleeve limiting boss 73 can cooperate with the corresponding sleeve to limit the position, cooperate with the corresponding bearing installation and stable operation, and the sleeve limiting boss 73 can separate the ball core 2 from the corresponding sleeves (i.e., the upper sleeve 91 and the lower sleeve 92), thereby preventing the outer spherical surface 20 of the ball core 2 from colliding or scratching during assembly and operation. In addition, the sleeve limiting boss 73 is provided with a grinding avoidance annular groove 74. The grinding avoidance annular groove 74 is centered on the centerline of the valve stem 7. The grinding avoidance annular groove 74 facilitates the grinding operation of the outer spherical surface 20 of the ball core 2, and the valve seat 6 can better grind the outer spherical surface 20. The valve seat 6 has a spatial position to avoid the valve seat 6, reducing the difficulty of the mutual grinding between the valve seat 6 and the ball core 2, and can significantly improve the stability and positioning of the ball core.

[0041] For example, a first recess 93 is provided on the lower side surface of the valve stem seat 9, that is, a first recess 93 is additionally provided on the lower end of the valve stem hole of the valve stem seat 9 (forming a stepped hole structure), and the upper shaft sleeve 91 is arranged in the first recess 93 to facilitate the installation of the upper shaft sleeve 91. The lower side of the upper shaft sleeve 91 is a shaft sleeve limiting boss 73 so as to limit the upper shaft sleeve 91 in the first recess 93; a second recess 13 is provided on the lower part of the valve body 1, and the lower shaft sleeve 92 is arranged in the second recess 13. The upper side of the lower shaft sleeve 92 is a shaft sleeve limiting boss 73 so as to limit the lower shaft sleeve 92 in the second recess 13.

[0042] For example, the valve cover 3 includes a left cover 31 and a right cover 32. The left cover 31 is connected to the left side of the valve body 1, and the right cover 32 is connected to the right side of the valve body 1. They are usually locked together by fasteners such as bolts. The medium channel 4 is respectively provided on the left cover 31 and the right cover 32, and the valve seats 6 are respectively arranged at the inner ports of the left cover 31 and the right cover 32.

[0043] Among them, the outer ring of the valve seat 6 is provided with an outer conical surface 62, and the outer conical surface 62 is located at the inner end position of the valve seat 6 (that is, the inner end position facing the middle valve cavity 5). In conjunction with the accompanying drawings, the outer conical surface 62 is located at the outer ring at the inner end position, and the sealing surface 60 is located at the inner ring at the inner end position of the valve seat 6. The left liner 81 and the right liner 82 respectively have a through hole 84 for the ball core 2 to be exposed and contact with the valve seat 6. The through hole 84 allows the ball core 2 to be exposed and contact with the valve seat 6 to seal and cooperate with the opening and closing of the valve, and also facilitates the medium to flow through the ball core 2 (its medium flow channel 21) when the valve is opened; and the inner side of the through hole 84 of the left liner 81 and the right liner 82 has an inner contact. The contact surface 85 (which can be configured as an inner spherical surface) mates with the outer spherical surface 20 of the ball core 2. The left and right liners 81, 82 provide effective support for the ball core 2, enhancing its operational stability. Furthermore, the outer sides of the through-holes 84 of the left and right liners 81, 82 have inner conical surfaces 86, which mate with the outer conical surface 62 of the valve seat 6. When the valve seat presses against the inner liner filling component (e.g., the left and right liners 81, 82), the inner contact surfaces 85 of the left and right liners 81, 82 come into close contact with the outer spherical surface 20 of the ball core 2, effectively preventing medium accumulation on the outer surface of the ball core and significantly extending the service life of the valve. In this structure, the inner liner filling component (including the left and right liners 81, 82), the valve seat 6, and the ball core 2 cooperate with each other. In this structure, the inner end of the valve seat (relatively more protruding) extends into the valve cavity.

[0044] Typically, the valve seat 6 is equipped with a pressure spring 33 that applies pressure toward the ball core, thereby squeezing the corresponding liner cavity-filling component (such as the left liner 81 or the right liner 82). Of course, when the left cover 31 and the valve body 1, or the right cover 32 and the valve body 1, are fastened together using fasteners, the valve seat can also squeeze the corresponding liner cavity-filling component (such as the left liner 81 or the right liner 82).

Claims

1. Anti-adsorption fixed ball valve, including a valve body (1), a ball core (2), a valve cover (3) and a medium channel (4), The valve cover (3) is connected to the valve body (1) and cooperates to form a valve cavity (5). The ball core (2) is arranged in the valve cavity (5). The medium channel (4) is connected to the valve cavity (5), and the inner port of the medium channel (4) is also provided with a valve seat (6). The ball core (2) has an outer spherical surface (20), and the valve seat (6) has a sealing mating surface (60). The sealing mating surface (60) and the outer spherical surface (20) are sealed together, and the characteristics are: An anti-adsorption annular groove (61) is also provided on the sealing mating surface (60) of the valve seat (6). The anti-adsorption annular groove (61) takes the center line of the valve seat (6) as its axis. The anti-adsorption annular groove (61) on the valve seat (6) is provided with at least one circle.

2. The anti-adsorption fixed ball valve according to claim 1, characterized in that: The ball core (2) is also connected to a valve stem (7); and a medium flow channel (21) is also provided on the ball core (2).

3. The anti-adsorption fixed ball valve according to claim 2, characterized in that: The valve cavity (5) is further provided with an inner lining cavity filling component (8), which is arranged outside the ball core (2) and has a valve stem avoidance opening (80) left in the inner lining cavity filling component (8).

4. The anti-adsorption fixed ball valve according to claim 3, characterized in that: The lining cavity-filling component (8) includes a left lining (81) and a right lining (82).

5. The anti-adsorption fixed ball valve according to claim 2, characterized in that: The valve stem (7) includes an upper stem (71) and a lower stem (72). The upper end of the core (2) is connected to the upper rod (71). The lower end of the core (2) is connected to the lower rod (72). The valve stem (7) and the ball core (2) adopt an integrated structure, and the upper rod (71) and the lower rod (72) are coaxially arranged.

6. The anti-adsorption fixed ball valve according to claim 2 or 5, characterized in that: A valve stem seat (9) is also installed on the upper part of the valve body (1). The valve stem seat (9) is located on the upper side of the valve cavity (5). An upper shaft sleeve (91) is provided on the valve stem seat (9) for cooperating with the valve stem (7). The lower portion of the valve body (1) is provided with a lower shaft sleeve (92) for cooperating with the valve stem (7) for operation.

7. The anti-adsorption fixed ball valve according to claim 6, characterized in that: The connection between the valve stem (7) and the ball core (2) is provided as a shaft sleeve limiting boss (73), and the shaft sleeve limiting boss (73) is provided with a grinding avoidance annular groove (74) for grinding the outer spherical surface (20) of the ball core (2), and the grinding avoidance annular groove (74) has the center line of the valve stem (7) as an axis; The shaft sleeve limiting boss (73) is arranged in the valve cavity (5).

8. The anti-adsorption fixed ball valve according to claim 7, characterized in that: The lower side of the valve stem seat (9) is provided with a first recess (93), the upper sleeve (91) is provided in the first recess (93), and the lower side of the upper sleeve (91) is a sleeve limiting boss (73). A second recess (13) is provided at the lower portion of the valve body (1), the lower shaft sleeve (92) is arranged in the second recess (13), and the upper side of the lower shaft sleeve (92) is a shaft sleeve limiting boss (73).

9. The anti-adsorption fixed ball valve according to claim 1, characterized in that: The valve cover (3) comprises a left cover (31) and a right cover (32), wherein the left cover (31) is connected to the left side of the valve body (1), and the right cover (32) is connected to the right side of the valve body (1). A medium channel (4) is provided on the left cover (31) and the right cover (32), respectively. The valve seat (6) is respectively arranged at the inner side port of the left cover (31) and the right cover (32). The left cover (31) and the valve body (1) are locked and connected by fasteners.

10. The anti-adsorption fixed ball valve according to claim 4 or 9, characterized in that: The outer ring of the valve seat (6) is provided with an outer conical surface (62), and the outer conical surface (62) is located at the inner end of the valve seat (6). The left lining (81) and the right lining (82) respectively have a through hole (84) for the ball core (2) to be exposed and contacted with the valve seat (6). The inner side of the through hole (84) has an inner contact surface (85), and the inner contact surface (85) is in contact with the outer spherical surface (20) of the ball core (2). The outer side of the through hole (84) has an inner conical surface (86), and the inner conical surface (86) is in contact with the outer conical surface (62) of the valve seat (6).

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