Kettle bottom discharging ball valve

Abstract

The utility model provides a kettle bottom discharging ball valve which solves the problems of valve seat local abrasion and leakage caused by unbalanced acting force between a ball body and an upper valve seat due to inclination of a valve rod of an existing kettle bottom discharging ball valve. The valve comprises a valve body, a kettle bottom flange, an auxiliary valve body, a spherical valve cavity, a ball core, an inclined valve rod, an upper valve seat assembly and an elastic compensation structure. The upper valve seat assembly comprises a first elastic sealing ring and a rigid backing ring, the elastic compensation structure exerts elastic pressure on the rigid backing ring through a plurality of independent elastic pieces, the rigid backing ring acts on the first elastic sealing ring, a second installation groove in the auxiliary valve body accommodates the first elastic sealing ring and the rigid backing ring, and a gap is formed between the rigid backing ring and the groove wall of the second installation groove. Therefore, the sealing pressure of different parts is balanced, the sealing performance is improved, and the service life is prolonged.

Description

Technical Field

[0001] This application relates to a ball valve, and more particularly to a bottom discharge ball valve. Background Technology

[0002] Chinese patent CN202320291473.6 discloses a novel pneumatic bottom discharge ball valve, comprising a valve body, a valve cover and a secondary valve body mounted on the valve body, a spherical valve cavity disposed within the valve body and the secondary valve body, a ball core disposed within the spherical valve cavity, and a valve seat mounted on the valve body and the secondary valve body and adapted to the ball core; its characteristic is that it also includes a valve stem mechanism mounted on the valve body and inclined downwards, the valve stem mechanism comprising a valve stem with one end fixedly connected to the ball core; the secondary valve body and the valve cover are also provided with a downwardly concave spherical surface. This utility model, by setting the valve stem mechanism on the side of the valve body and inclined downwards, allows the actuator for driving the valve stem to be installed at an angle, forming a certain angle with the bottom of the reactor, avoiding interference between the actuator and the insulation jacket of the reactor bottom. Furthermore, the inclined arrangement shortens the overhang height of the actuator, making the overall valve structure compact and improving the valve structural strength.

[0003] The existing technology still has the following problems: the ball is sealed by a single valve seat on both the top and bottom. However, since the ball is driven to pivot by a valve stem mechanism that is set in a downward tilt, the interaction force between the ball and the upper valve seat is uneven. This results in an uneven sealing effect. After long-term use, the valve seat is prone to local wear, which can easily lead to leakage. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a bottom discharge ball valve.

[0005] To achieve the above objectives, the technical solution of this application is as follows: A bottom discharge ball valve includes a valve body, a bottom flange mounted on the valve body, a secondary valve body mounted on the inner circumference of the bottom flange, a spherical valve cavity disposed within the valve body and the secondary valve body, a ball core installed within the spherical valve cavity, and a valve stem inclined downward relative to the central axis of the bottom flange and used to drive the ball core to rotate; it further includes: an upper valve seat assembly, which is mounted within the secondary valve body and used to form a seal with the upper part of the ball core; the upper valve seat assembly includes a first elastic sealing ring and a rigid gasket ring, the rigid gasket ring being located at... The first elastic sealing ring is located on the side away from the ball core; it also includes an elastic compensation structure, which has several independently arranged elastic elements. The elastic compensation structure forms several independent elastic pressures on the rigid gasket ring and towards the first elastic sealing ring through the several independently arranged elastic elements; wherein, the secondary valve body is provided with a second mounting groove for accommodating the first elastic sealing ring and the rigid gasket ring, and there are gaps between the inner and outer circumferences of the rigid gasket ring and the groove wall of the second mounting groove, so that the rigid gasket ring can tilt relative to the mounting groove.

[0006] Furthermore, the elastic element includes a plurality of first springs and a plurality of second springs. Both the first springs and the second springs are disposed at the upper end of the rigid washer ring. The first springs are distributed near the outer periphery of the rigid washer ring and the plurality of first springs are evenly distributed in a ring. The second springs are distributed near the inner periphery of the rigid washer ring and the plurality of second springs are evenly distributed in a ring.

[0007] Furthermore, the upper valve seat assembly also includes a first rigid sealing ring, the lower end face of which is provided with a first hard sealing surface that fits against the outer peripheral surface of the ball core.

[0008] Furthermore, the first rigid sealing ring is located on the inner circumference of the first elastic sealing ring, and the lower end face of the first rigid sealing ring is provided with a conical surface on the inner circumference of the first hard sealing surface, and a scraper gap is formed between the conical surface and the outer circumferential surface of the ball core.

[0009] Furthermore, a second mounting groove is formed between the outer periphery of the first rigid sealing ring and the sub-valve body, which is interference-fitted with the first elastic sealing ring, and the rigid gasket is clearance-fitted with the second mounting groove.

[0010] Furthermore, it also includes a third elastic element that acts on the upper end of the first rigid sealing ring to make the first rigid sealing ring fit against the outer peripheral surface of the ball core.

[0011] Furthermore, it also includes a lower valve seat assembly installed in the valve body, the lower valve seat assembly being used to form a seal with the lower part of the ball core.

[0012] Furthermore, the lower valve seat assembly includes a second rigid sealing ring and a second elastic sealing ring, the second elastic sealing ring being embedded in the inner circumference of the second rigid sealing ring.

[0013] Furthermore, the valve body is provided with a third mounting groove for accommodating the second rigid sealing ring; a fourth mounting groove is formed on the inner circumference of the second rigid sealing ring, and the second elastic sealing ring is embedded in the fourth mounting groove.

[0014] Furthermore, the inner circumference of the second rigid sealing ring is provided with a second hard sealing surface that fits against the outer circumferential surface of the ball core, and the inner circumference of the second elastic seal is provided with a second elastic sealing surface that fits against the outer circumferential surface of the ball core. The second elastic sealing surface forms a separating band in the middle of the second hard sealing surface.

[0015] The beneficial effects of this application are as follows: By applying multi-directional elastic pressure to the rigid gasket ring through the independent elastic element in the elastic compensation structure, combined with the clearance fit of the second mounting groove, the rigid gasket ring can adaptively tilt, thereby balancing the sealing pressure distribution between the ball core and the upper valve seat assembly. This effectively solves the problem of uneven sealing caused by the tilting drive of the valve stem in the prior art, and significantly reduces the risk of leakage. At the same time, the design of the elastic compensation structure enhances the uniformity of sealing, improves the overall sealing performance and life of the valve. In addition, the combination of the hard sealing surface and the elastic sealing ring, as well as the setting of the scraper gap, further optimizes the sealing effect and enhances the structural stability. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the structure of a bottom discharge ball valve provided in one embodiment of this application;

[0018] Figure 2 for Figure 1 A magnified structural diagram of part A in the middle;

[0019] Figure 3 for Figure 1 A magnified structural diagram of part B.

[0020] In the figure, 1 is the valve body, 2 is the bottom flange, 3 is the secondary valve body, 4 is the ball core, 5 is the valve stem, 61 is the first elastic sealing ring, 62 is the rigid gasket ring, 63 is the first spring, 64 is the second spring, 65 is the first rigid sealing ring, 651 is the first hard sealing surface, 652 is the conical surface, 66 is the third spring, 71 is the second rigid sealing ring, and 72 is the second elastic sealing ring. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] In this application, "and / or" is merely a way of describing the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0027] It should be noted that in this application, the words "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of words such as "in some embodiments," "exemplarily," and "for example" is intended to present related concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0028] Chinese patent CN202320291473.6 discloses a novel pneumatic bottom discharge ball valve, comprising a valve body, a valve cover and a secondary valve body mounted on the valve body, a spherical valve cavity disposed within the valve body and the secondary valve body, a ball core disposed within the spherical valve cavity, and a valve seat mounted on the valve body and the secondary valve body and adapted to the ball core; its characteristic is that it also includes a valve stem mechanism mounted on the valve body and inclined downwards, the valve stem mechanism comprising a valve stem with one end fixedly connected to the ball core; the secondary valve body and the valve cover are also provided with a downwardly concave spherical surface. This utility model, by setting the valve stem mechanism on the side of the valve body and inclined downwards, allows the actuator for driving the valve stem to be installed at an angle, forming a certain angle with the bottom of the reactor, avoiding interference between the actuator and the insulation jacket of the reactor bottom. Furthermore, the inclined arrangement shortens the overhang height of the actuator, making the overall valve structure compact and improving the valve structural strength.

[0029] The existing technology still has the following problems: the ball is sealed by a single valve seat on both the top and bottom. However, since the ball is driven to pivot by a valve stem mechanism that is set in a downward tilt, the interaction force between the ball and the upper valve seat is uneven. This results in an uneven sealing effect. After long-term use, the valve seat is prone to local wear, which can easily lead to leakage.

[0030] The embodiments in this application are mainly improvements based on the structure disclosed in the prior art CN202320291473.6.

[0031] Specifically, embodiments of this application provide a bottom discharge ball valve, such as... Figure 1 As shown: The system includes a valve body 1, a bottom flange 2 mounted on the valve body 1, a secondary valve body 3 mounted on the inner circumference of the bottom flange 2, a spherical valve cavity disposed within the valve body 1 and the secondary valve body 3, a ball core 4 installed within the spherical valve cavity, and a valve stem 5 inclined downward relative to the central axis of the bottom flange 2 for driving the ball core 4 to rotate. As disclosed in prior art CN202320291473.6, the valve body 1 serves as the main support structure and has a fluid outlet. The bottom flange 2 connects to the bottom of the reactor and is connected to the upper end of the valve body 1, forming a fluid inlet. The secondary valve body 3 is fixed to the inner circumference of the bottom flange 2 and together with the valve body 1 forms a spherical valve cavity. The ball core 4 is installed within this valve cavity and is driven to rotate by the valve stem 5 to achieve fluid flow control.

[0032] like Figure 2 As shown, this embodiment of the application further includes an upper valve seat assembly, which is installed inside the secondary valve body 3 and is used to form a seal with the upper part of the ball core 4; the upper valve seat assembly includes a first elastic sealing ring 61 and a rigid gasket 62, the rigid gasket 62 being located on the side of the first elastic sealing ring 61 away from the ball core 4; it also includes an elastic compensation structure, which is provided with a plurality of independently arranged elastic elements, the elastic compensation structure forming a plurality of independent elastic pressures on the rigid gasket 62 and toward the first elastic sealing ring 61 through the plurality of independently arranged elastic elements; wherein, the secondary valve body 3 is provided with a second mounting groove for accommodating the first elastic sealing ring 61 and the rigid gasket 62, and there are gaps between the inner and outer circumferences of the rigid gasket 62 and the groove wall of the second mounting groove, so that the rigid gasket 62 can tilt relative to the mounting groove. In the upper valve seat assembly, the first elastic sealing ring 61 directly contacts the upper surface of the ball core 4 to form a soft seal. The rigid gasket 62, as a support member, is located at its upper end. The elastic compensation structure applies elastic pressure to the rigid gasket 62 through multiple independent elastic elements (such as springs), pushing it towards the ball core 4, thereby transmitting pressure to the first elastic sealing ring 61. During operation, due to the gap between the rigid gasket 62 and the wall of the second mounting groove, it is allowed to finely adjust its tilt angle under elastic pressure, adaptively compensating for the uneven force on the ball core 4 caused by the tilting setting of the valve stem 5, ensuring a uniform distribution of sealing force. For example, when the ball core 4 rotates or is compressed, the gap design allows the rigid gasket 62 to swing slightly, balancing local stress.

[0033] Optionally, in some embodiments, the elastic element includes a plurality of first springs 63 and a plurality of second springs 64. Both the first springs 63 and the second springs 64 are disposed at the upper end of the rigid washer ring 62. The first springs 63 are distributed near the outer periphery of the rigid washer ring 62, and the plurality of first springs 63 are evenly distributed in a ring. The second springs 64 are distributed near the inner periphery of the rigid washer ring 62, and the plurality of second springs 64 are evenly distributed in a ring. The first springs 63 are located in the outer edge region of the rigid washer ring 62, and the second springs 64 are located in the inner edge region. They are independently configured and apply axially downward pressure respectively, forming a zoned compensation mechanism. Through the inner and outer zoned spring layout, more refined elastic compensation is provided. The first springs 63 act on the outer edge of the rigid washer ring 62 to resist external deformation, and the second springs 64 act on the inner edge to enhance the sealing force in the central region. Therefore, when the ball core 4 is subjected to tilting force, the zoned pressure can adaptively adjust the tilt of the rigid washer ring 62, ensuring that the first elastic sealing ring 61 is subjected to uniform force. During valve assembly, the number and distribution density of the first spring 63 and the second spring 64 can be selected according to the size of the ball core 4 and the operating conditions. For example, the number of springs can be increased in high-pressure environments to enhance the compensation effect, or the spring preload setting can be optimized in frequent switching applications.

[0034] Optionally, in some embodiments, the upper valve seat assembly further includes a first rigid sealing ring 65, the lower end face of which has a first hard sealing surface 651 that fits against the outer peripheral surface of the ball core 4. The first rigid sealing ring 65 is installed inside the secondary valve body 3, and its lower end first hard sealing surface 651 directly contacts the surface of the ball core 4 to form a hard sealing structure, which works in conjunction with the first elastic sealing ring 61. The first rigid sealing ring 65 and the first elastic sealing ring 61 form a dual protection of soft and hard seals.

[0035] Optionally, in some embodiments, the first rigid sealing ring is located on the inner circumference of the first elastic sealing ring, and the lower end face of the first rigid sealing ring 65 is provided with a conical surface 652 on the inner circumference of the first hard sealing surface 651. A scraper gap is formed between the conical surface 652 and the outer circumferential surface of the ball core 4. The conical surface 652 is located inside the first hard sealing surface 651 and forms a tiny gap with the surface of the ball core 4 for scraping off impurities, so that the first hard sealing surface 651 acts as a scraper, which can prevent particulate impurities from entering between the first elastic sealing ring 61 and the ball core 4 and slow down the wear rate of the first elastic sealing ring 61.

[0036] Optionally, in some embodiments, a second mounting groove is formed between the outer periphery of the first rigid sealing ring 65 and the sub-valve body 3, which is in an interference fit with the first elastic sealing ring 61, and the rigid washer 62 is in a clearance fit with the second mounting groove. The second mounting groove serves as a fixed cavity, in which the first elastic sealing ring 61 is interference-fitted to ensure stability, while the rigid washer 62 is in a clearance fit to allow tilting. Tolerances are controlled during the machining of the second mounting groove to ensure that the interference fit is between 0.05-0.1 mm for reliable fixing.

[0037] Optionally, in some embodiments, a third elastic element is further included, acting on the upper end of the first rigid sealing ring 65 to cause the first rigid sealing ring 65 to conform to the outer peripheral surface of the ball core 4. The third elastic element is located at the top of the first rigid sealing ring 65 and applies downward pressure. Specifically, the third elastic element can be a third spring 66, and several third springs 66 are provided and the several third springs are evenly distributed in a ring.

[0038] Optionally, in some embodiments, a lower valve seat assembly is further included, which is installed within the valve body 1 and forms a seal with the lower part of the ball core 4. The lower valve seat assembly includes a second rigid sealing ring 71 and a second elastic sealing ring 72, and is installed at the bottom of the valve body 1.

[0039] Alternatively, in some embodiments, such as Figure 3 As shown, the lower valve seat assembly includes a second rigid sealing ring 71 and a second elastic sealing ring 72, with the second elastic sealing ring 72 embedded in the inner circumference of the second rigid sealing ring 71. The second elastic sealing ring 72 is embedded in the inner circumferential groove of the second rigid sealing ring 71, forming a combined seal. The second rigid sealing ring 71 serves as a main component supporting the ball core 4, and simultaneously forms a hard seal that conforms to the surface of the ball core 4. The second elastic sealing ring 72 compensates for gaps and vibrations.

[0040] Optionally, in some embodiments, the valve body 1 is provided with a third mounting groove for accommodating the second rigid sealing ring 71; a fourth mounting groove is formed on the inner circumference of the second rigid sealing ring 71, and the second elastic sealing ring 72 is embedded in the fourth mounting groove.

[0041] Optionally, in some embodiments, the inner circumference of the second rigid sealing ring 71 is provided with a second hard sealing surface that fits against the outer circumferential surface of the ball core 4, and the inner circumference of the second elastic sealing ring 72 is provided with a second elastic sealing surface that fits against the outer circumferential surface of the ball core 4. The second elastic sealing surface forms a dividing band in the middle of the second hard sealing surface. The second hard sealing surface provides the main seal, the second elastic sealing surface serves as an auxiliary seal, and the dividing band allows for pressure equalization.

[0042] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A bottom discharge ball valve, comprising a valve body, a bottom flange mounted on the valve body, a secondary valve body mounted on the inner circumference of the bottom flange, a spherical valve cavity disposed within the valve body and the secondary valve body, a ball core installed within the spherical valve cavity, and a valve stem inclined downward relative to the central axis of the bottom flange and used to drive the ball core to rotate, characterized in that, Also includes: An upper valve seat assembly is installed in the sub-valve body and is used to form a seal with the upper part of the ball core; The upper valve seat assembly includes a first elastic sealing ring and a rigid gasket ring, wherein the rigid gasket ring is located on the side of the first elastic sealing ring away from the ball core; It also includes an elastic compensation structure, which has several independently arranged elastic elements. The elastic compensation structure forms several independent elastic pressures on the rigid gasket ring and toward the first elastic sealing ring through the several independently arranged elastic elements. The secondary valve body is provided with a second mounting groove for accommodating the first elastic sealing ring and the rigid gasket. There are gaps between the inner and outer circumferences of the rigid gasket and the groove wall of the second mounting groove, so that the rigid gasket can tilt relative to the mounting groove.

2. The bottom discharge ball valve according to claim 1, characterized in that, The elastic element includes a plurality of first springs and a plurality of second springs. The first springs and the second springs are both disposed at the upper end of the rigid washer ring. The first springs are distributed near the outer periphery of the rigid washer ring and the plurality of first springs are evenly distributed in a ring. The second springs are distributed near the inner periphery of the rigid washer ring and the plurality of second springs are evenly distributed in a ring.

3. The bottom discharge ball valve according to claim 1, characterized in that, The upper valve seat assembly further includes a first rigid sealing ring, the lower end face of which is provided with a first hard sealing surface that fits against the outer peripheral surface of the ball core.

4. The bottom discharge ball valve according to claim 3, characterized in that, The first rigid sealing ring is located on the inner circumference of the first elastic sealing ring. The lower end face of the first rigid sealing ring is provided with a conical surface on the inner circumference of the first hard sealing surface. A scraper gap is formed between the conical surface and the outer circumferential surface of the ball core.

5. The bottom discharge ball valve according to claim 3, characterized in that, A second mounting groove is formed between the outer periphery of the first rigid sealing ring and the sub-valve body, which is interference-fitted with the first elastic sealing ring, and the rigid gasket is clearance-fitted with the second mounting groove.

6. The bottom discharge ball valve according to claim 3, characterized in that, It also includes a third elastic element that acts on the upper end of the first rigid sealing ring to make it conform to the outer peripheral surface of the ball core.

7. The bottom discharge ball valve according to claim 1, characterized in that, It also includes a lower valve seat assembly installed in the valve body, the lower valve seat assembly being used to form a seal with the lower part of the ball core.

8. The bottom discharge ball valve according to claim 7, characterized in that, The lower valve seat assembly includes a second rigid sealing ring and a second elastic sealing ring, wherein the second elastic sealing ring is embedded in the inner circumference of the second rigid sealing ring.

9. The bottom discharge ball valve according to claim 8, characterized in that, The valve body is provided with a third mounting groove for accommodating the second rigid sealing ring; a fourth mounting groove is formed on the inner circumference of the second rigid sealing ring, and the second elastic sealing ring is embedded in the fourth mounting groove.

10. The bottom discharge ball valve according to claim 8 or 9, characterized in that, The inner circumference of the second rigid sealing ring is provided with a second hard sealing surface that fits against the outer circumferential surface of the ball core, and the inner circumference of the second elastic seal is provided with a second elastic sealing surface that fits against the outer circumferential surface of the ball core. The second elastic sealing surface forms a separating band in the middle of the second hard sealing surface.

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