Self-tightening sealing ball valve

Abstract

The utility model belongs to the technical field of ball valves, and particularly relates to a self-tightening sealing ball valve which comprises a valve body, a valve core, a sealing ring and a sealing ring. The pipelines are arranged on the two sides of the valve body, and medium channels are formed in the pipelines; the connecting assembly comprises first flanges arranged at the two ends of the valve body and a second flange arranged on the pipeline; the sealing assembly comprises a first sealing piece arranged between the first flange and the second flange and a second sealing piece arranged on one side of the ball body and located between the valve seat and the valve body. The number of the first sealing pieces and the number of the second sealing pieces are both two. The ball valve has the beneficial effects that the two sealing pieces are arranged between the first flange and the second flange and between the ball body and the valve seat correspondingly, the double-sealing effect is achieved, the sealing performance of the valve is greatly improved, medium leakage can be effectively prevented even in the working environment of high pressure or high temperature or corrosive media, and the service life of the valve is prolonged. And safe and stable operation of the system is ensured.

Description

Technical Field

[0001] This application belongs to the technical field of ball valves, and particularly relates to a self-tightening seal ball valve. Background Art

[0002] The ball valve evolved from a plug valve. Its closing member is a sphere, and it uses the rotation of the sphere around the axis of the valve stem by 90° to achieve the purpose of opening and closing. As the name implies, a self-tightening seal ball valve means that when the valve is in the closed state, it can use the pressure of the medium itself to achieve a more tight sealing effect. The design of this kind of ball valve usually includes special sealing structures and materials to ensure that the sealing performance remains stable and reliable under high pressure or temperature changes.

[0003] The patent with the publication number CN214305380U discloses a self-tightening seal structure for a cryogenic ball valve, which includes a first connecting pipe. One end of the first connecting pipe is fixed with a transition pipe, one end of the transition pipe is connected with a second connecting pipe, a support column is arranged on the top of the transition pipe, a fixed shell is fixed on the top of the support column, a connecting seat is fixed on one side of the fixed shell, a rotating rod is rotatably connected inside the connecting seat and the fixed shell, a rotating disc is fixed at one end of the rotating rod, a first gear is fixed at the other end of the rotating rod, a rotating shaft is rotatably connected inside the support column, a second gear is fixed at the top end of the rotating shaft, and the first gear meshes with the second gear. An extension shaft is fixed at the bottom end of the rotating shaft, and a spherical valve is rotatably connected inside the transition pipe.

[0004] The above patent provides a sealing effect by setting a gasket and a sealing ring, but the sealing effects of both still need to be strengthened and improvement is required. Summary of the Utility Model

[0005] The purpose of this application is to provide a self-tightening seal ball valve that can solve the above problems.

[0006] The purpose of this application is to provide a self-tightening seal ball valve, including:

[0007] A valve body, inside which a valve seat and a sphere are arranged;

[0008] A pipeline, arranged on both sides of the valve body, and a medium channel is arranged inside it;

[0009] A connection assembly, including a first flange arranged at both ends of the valve body and a second flange arranged on the pipeline;

[0010] A sealing assembly, including a first sealing member arranged between the first flange and the second flange and a second sealing member arranged on one side of the sphere and between the valve seat and the valve body;

[0011] Among them, two first sealing members and two second sealing members are provided.

[0012] Adopting the above self-tightening seal ball valve, by respectively arranging two seals (i.e., the first seal and the second seal) between the first flange and the second flange and between the sphere and the valve seat, the effect of double sealing is achieved, greatly enhancing the sealing performance of the valve. Even in the working environment of high pressure, high temperature or corrosive medium, it can effectively prevent medium leakage and ensure the safe and stable operation of the system. The double-sealing structure not only improves the sealing performance but also increases the reliability of the system, extends the service life of the valve, and reduces the downtime and cost of maintenance due to leakage. At the same time, the connecting component adopts flange connection, which is convenient for the installation and disassembly of the valve, and the good sealing performance reduces the possibility of medium leakage, thereby improving the overall efficiency of the system.

[0013] Furthermore, the first seal includes:

[0014] A connecting inner ring;

[0015] A sealing outer ring, in a T shape, one end of which is connected to the connecting inner ring and extends towards the medium channel;

[0016] Wherein, the first flange and the second flange are provided with clamping grooves adapted to the connecting inner ring.

[0017] The sealing outer ring is designed in a T shape, which not only increases the sealing area but also forms a more compact sealing barrier through the part extending towards the medium channel. The extending part can effectively block the penetration of the medium under high pressure or complex flow conditions, improving the reliability and durability of the seal. The connecting inner ring is adapted to the clamping grooves provided on the first flange and the second flange, ensuring the accuracy and stability of the seal during installation. The clamping grooves not only provide positioning points for the seal but also pre-tighten the seal through their structural characteristics, helping to form an initial sealing force and further improving the sealing effect.

[0018] Furthermore: One side of the sealing outer ring close to the connecting inner ring is in close contact with the medium channel, and a diversion inclined surface is provided on the side far from the connecting inner ring.

[0019] One side of the sealing outer ring close to the connecting inner ring is in close contact with the medium channel, ensuring the close contact between the seal and the medium channel, reducing the possibility of medium leakage, and the close contact design also helps to form a certain sealing pressure to improve the sealing effect. A diversion inclined surface is provided on the side far from the connecting inner ring, which can guide the medium to generate a smoother flow path when passing through the seal, reducing the turbulence and eddy current phenomena of the medium around the seal, thereby reducing the erosion and wear of the medium on the seal, and also helping to reduce the accumulation and precipitation of the medium around the seal, further extending the service life of the seal. By combining the design of being in close contact with the medium channel and the diversion inclined surface, the first seal not only ensures good sealing performance but also takes into account the smooth passage of the medium.

[0020] Furthermore, the connecting inner ring and the sealing outer ring are integrally formed.

[0021] The integrally formed design eliminates the seam between the connecting inner ring and the sealing outer ring, thus avoiding leakage problems caused by insufficient material strength or loose fit at the seam, and also simplifies the manufacturing process of the seal, reducing production steps and costs.

[0022] Furthermore, the second seal includes:

[0023] Packing, arranged between the valve seat and the inner wall of the valve body;

[0024] Dust-proof part, arranged between the valve seat and the inner wall of the valve body;

[0025] Elastic part, arranged between the packing and the dust-proof ring;

[0026] Wherein, a first extrusion ring and a second extrusion ring are respectively arranged between the elastic part and the packing and between the elastic part and the dust-proof part.

[0027] The packing is arranged between the valve seat and the inner wall of the valve body, and the dust-proof part is also arranged between the valve seat and the inner wall of the valve body. Its main function is to prevent impurities such as dust from entering the sealing area. The elastic part is located between the packing and the dust-proof ring. Through its elastic force, the first extrusion ring and the second extrusion ring can respectively extrude the packing and the dust-proof part, not only achieving the sealing effect, but also maintaining the stability and reliability of the seal during the opening and closing process of the valve. Among them, the first extrusion ring extrudes the packing through the action of the elastic part, making it fit more tightly with the valve seat and the inner wall of the valve body. The second extrusion ring extrudes the dust-proof part to ensure its tightness and prevent dust from entering. These two extrusion rings also play a role in preventing the elastic part (such as a spring) from getting stuck during the expansion and contraction process, ensuring the normal operation of the seal.

[0028] Furthermore, one end of the first extrusion ring in contact with the packing is provided with a first guiding protrusion protruding towards the middle;

[0029] One end of the second extrusion ring in contact with the dust-proof part is provided with a second guiding protrusion protruding towards the middle;

[0030] Wherein, the cross-sections of the first guiding protrusion and the second guiding protrusion are both U-shaped.

[0031] Since the cross-sections of the first guiding protrusion and the second guiding protrusion are both U-shaped, under the action of the first guiding protrusion of the first extrusion ring, the packing expands towards both sides of the first guiding protrusion, thus closely adhering to the valve seat and the valve body to play a sealing role; similarly, under the action of the second guiding protrusion of the second extrusion ring, the dust-proof part expands towards both sides of the second guiding protrusion, thus also closely adhering to the valve body to play a further sealing role.

[0032] The beneficial effects of this application are as follows:

[0033] 1. By respectively arranging two seals between the first flange and the second flange and between the sphere and the valve seat, the effect of double sealing is achieved, greatly enhancing the sealing performance of the valve. Even in the working environments of high pressure, high temperature or corrosive media, it can effectively prevent medium leakage and ensure the safe and stable operation of the system;

[0034] 2. One side of the outer sealing ring close to the inner connecting ring is in close contact with the medium channel, ensuring the close contact between the seal and the medium channel, reducing the possibility of medium leakage. And the close-contact design also helps to form a certain sealing pressure and improve the sealing effect. A diversion inclined surface is arranged on the side far from the inner connecting ring, which can guide the medium to generate a smoother flow path when passing through the seal, reducing the turbulence and eddy current phenomena of the medium around the seal, thereby reducing the erosion and wear of the medium on the seal;

[0035] 3. Since the cross-sections of the first guiding protrusion and the second guiding protrusion are both U-shaped, under the action of the first guiding protrusion of the first pressing ring, the packing expands to both sides of the first guiding protrusion, so as to be in close contact with the valve seat and the valve body, playing a sealing role; Similarly, under the action of the second guiding protrusion of the second pressing ring, the dust-proof part expands to both sides of the second guiding protrusion, so as to also be in close contact with the valve body, playing a further sealing role. Description of the Drawings

[0036] Figure 1 is a schematic structural diagram of the present utility model;

[0037] Figure 2 is a schematic structural diagram of the first seal of the present utility model;

[0038] Figure 3 is a schematic structural diagram of the second seal of the present utility model.

[0039] The reference numerals in the drawings are: 100, valve body; 110, valve seat; 120, sphere; 200, pipeline; 210, medium channel; 300, connecting component; 310, first flange; 320, second flange; 400, first seal; 410, inner connecting ring; 420, outer sealing ring; 430, clamping groove; 440, diversion inclined surface; 500, second seal; 510, packing; 520, dust-proof part; 530, elastic part; 540, first pressing ring; 550, second pressing ring; 560, first guiding protrusion; 570, second guiding protrusion. Detailed Embodiments

[0040] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0041] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0042] Next, the self-tightening seal ball valve provided in the embodiments of the present application will be described in detail in conjunction with the accompanying drawings through specific embodiments and their application scenarios.

[0043] Embodiment 1:

[0044] As Figures 1 to 3 shown, the embodiment of the present application provides a self-tightening seal ball valve, including:

[0045] A valve body 100, inside which a valve seat 110 and a sphere 120 are provided;

[0046] A pipeline 200, arranged on both sides of the valve body 100, inside which a medium channel 210 is provided;

[0047] A connection assembly 300, including a first flange 310 arranged at both ends of the valve body 100 and a second flange 320 arranged on the pipeline 200;

[0048] A seal assembly, including a first seal 400 arranged between the first flange 310 and the second flange 320 and a second seal 500 arranged on one side of the sphere 120 and located between the valve seat 110 and the valve body 100;

[0049] Among them, both the first seal 400 and the second seal 500 are provided with two.

[0050] In some embodiments of the embodiments of the present application, as Figure 1As shown in the figure, by using the above self-tightening seal ball valve, two seals (i.e., the first seal 400 and the second seal 500) are respectively arranged between the first flange 310 and the second flange 320 and between the sphere 120 and the valve seat 110, achieving the effect of double sealing, greatly enhancing the sealing performance of the valve. Even in the working environment of high pressure, high temperature or corrosive medium, it can effectively prevent medium leakage and ensure the safe and stable operation of the system. The double-sealing structure not only improves the sealing performance, but also increases the reliability of the system, extends the service life of the valve, and reduces the downtime and cost of maintenance caused by leakage. At the same time, the connecting component 300 adopts flange connection, which is convenient for the installation and disassembly of the valve, and the good sealing performance reduces the possibility of medium leakage, thus improving the overall efficiency of the system.

[0051] Embodiment 2:

[0052] The embodiment of the present application provides a self-tightening seal ball valve. In addition to including the above technical features, the self-tightening seal ball valve of the embodiment of the present application further includes the following technical features.

[0053] As Figure 2 shown, the first seal 400 includes:

[0054] A connecting inner ring 410;

[0055] A sealing outer ring 420, in a T shape, one end of which is connected to the connecting inner ring 410 and extends towards the medium channel 210;

[0056] Wherein, clamping grooves 430 adapted to the connecting inner ring 410 are provided on the first flange 310 and the second flange 320.

[0057] In the embodiment of the present application, the sealing outer ring 420 adopts a T-shaped design, which not only increases the sealing area, but also forms a more compact sealing barrier through the part extending towards the medium channel 210. The extending part can effectively block the penetration of the medium under high pressure or complex flow conditions, improving the reliability and durability of the seal. The connecting inner ring 410 is adapted to the clamping grooves 430 provided on the first flange 310 and the second flange 320, ensuring the accuracy and stability of the seal during installation. The clamping grooves 430 not only provide positioning points for the seal, but also pre-tighten the seal through their structural characteristics, helping to form an initial sealing force and further improving the sealing effect.

[0058] Moreover, one side of the sealing outer ring 420 close to the connecting inner ring 410 is in close contact with the medium channel 210, and a flow guiding inclined surface 440 is provided on the side far from the connecting inner ring 410.

[0059] In some embodiments of the present application, one side of the sealing outer ring 420 close to the connecting inner ring 410 is in close contact with the medium channel 210, ensuring the tight contact between the seal and the medium channel 210, reducing the possibility of medium leakage, and the close contact design also helps to form a certain sealing pressure and improve the sealing effect. A diversion inclined surface 440 is provided on the side far from the connecting inner ring 410, which can guide the medium to generate a smoother flow path when passing through the seal, reducing the turbulence and eddy current phenomena of the medium around the seal, thereby reducing the erosion and wear of the medium on the seal, and also helping to reduce the accumulation and precipitation of the medium around the seal, further extending the service life of the seal. By combining the design of closely contacting the medium channel 210 and the diversion inclined surface 440, the first seal 400 not only ensures good sealing performance but also takes into account the smooth passage of the medium.

[0060] Furthermore, the connecting inner ring 410 and the sealing outer ring 420 are integrally formed.

[0061] The integrally formed design eliminates the seam between the connecting inner ring 410 and the sealing outer ring 420, thus avoiding leakage problems caused by insufficient material strength or loose fit at the seam, and also simplifies the manufacturing process of the seal, reducing production steps and costs.

[0062] Embodiment 3:

[0063] The embodiment of the present application provides a self-tightening seal ball valve. In addition to including the above technical features, the self-tightening seal ball valve of the embodiment of the present application further includes the following technical features.

[0064] As Figure 1 and Figure 3 shown, the second seal 500 includes:

[0065] A packing 510, arranged between the valve seat 110 and the inner wall of the valve body 100;

[0066] A dust-proof member 520, arranged between the valve seat 110 and the inner wall of the valve body 100;

[0067] An elastic member 530, arranged between the packing 510 and the dust-proof ring;

[0068] Wherein, a first extrusion ring 540 and a second extrusion ring 550 are respectively arranged between the elastic member 530 and the packing 510 and between the elastic member 530 and the dust-proof member 520.

[0069] In the embodiment of the present application, the packing 510 is arranged between the valve seat 110 and the inner wall of the valve body 100. The dust-proof member 520 is also arranged between the valve seat 110 and the inner wall of the valve body 100. Its main function is to prevent impurities such as dust from entering the sealing area. The elastic member 530 is located between the packing 510 and the dust-proof ring. Through its elastic force, the first extrusion ring 540 and the second extrusion ring 550 can respectively extrude the packing 510 and the dust-proof member 520, which not only achieves the sealing effect but also can maintain the stability and reliability of the sealing member during the opening and closing process of the valve. Among them, the first extrusion ring 540 extrudes the packing 510 through the action of the elastic member 530, making it fit more closely to the valve seat 110 and the inner wall of the valve body 100. The second extrusion ring 550 extrudes the dust-proof member 520 to ensure its tightness and prevent dust from entering. These two extrusion rings also play a role in preventing the elastic member 530 (such as a spring) from getting stuck during the telescopic process, ensuring the normal operation of the sealing member.

[0070] Embodiment 4:

[0071] The embodiment of the present application provides a self-tightening seal ball valve. In addition to including the above technical features, the self-tightening seal ball valve of the embodiment of the present application further includes the following technical features.

[0072] As Figure 3 shown, one end of the first extrusion ring 540 in contact with the packing 510 is provided with a first guiding protrusion 560 protruding towards the middle;

[0073] One end of the second extrusion ring 550 in contact with the dust-proof member 520 is provided with a second guiding protrusion 570 protruding towards the middle;

[0074] Among them, the cross-sections of the first guiding protrusion 560 and the second guiding protrusion 570 are both U-shaped.

[0075] In the embodiment of the present application, since the cross-sections of the first guiding protrusion 560 and the second guiding protrusion 570 are both U-shaped, under the action of the first guiding protrusion 560 of the first extrusion ring 540, the packing 510 expands towards both sides of the first guiding protrusion 560, so as to be in close contact with the valve seat 110 and the valve body 100, playing a sealing role; similarly, under the action of the second guiding protrusion 570 of the second extrusion ring 550, the dust-proof member 520 expands towards both sides of the second guiding protrusion 570, so as to also be in close contact with the valve body 100, playing a further sealing role.

[0076] It should be noted that in this text, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0077] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A self-tightening sealing ball valve, characterized in that: include: A valve body (100) is provided with a valve seat (110) and a ball (120) inside; The pipeline (200) is arranged on both sides of the valve body (100), and a medium channel (210) is arranged inside the pipeline; A connection assembly (300) comprising a first flange (310) disposed at both ends of a valve body (100) and a second flange (320) disposed on a pipeline (200); A sealing assembly, comprising a first sealing member (400) disposed between a first flange (310) and a second flange (320) and a second sealing member (500) disposed on one side of a ball (120) and located between a valve seat (110) and a valve body (100); Wherein, two first sealing members (400) and two second sealing members (500) are provided.

2. A self-tightening sealing ball valve according to claim 1, characterized in that: The first sealing member (400) comprises: Connecting the inner ring (410); The sealing outer ring (420) is T-shaped, one end of which is connected to the connecting inner ring (410) and extends toward the medium channel (210); Wherein, the first flange (310) and the second flange (320) are provided with a clamping groove (430) adapted to the connecting inner ring (410).

3. A self-tightening sealing ball valve according to claim 2, characterized in that: The side of the sealing outer ring (420) close to the connection inner ring (410) is in close contact with the medium channel (210), and the side away from the connection inner ring (410) is provided with a guide slope (440).

4. A self-tightening sealing ball valve according to claim 3, characterized in that: The connecting inner ring (410) and the sealing outer ring (420) are integrally formed.

5. A self-tightening sealing ball valve according to claim 4, characterized in that: The second sealing member (500) comprises: A packing (510) is arranged between the valve seat (110) and the inner wall of the valve body (100); A dustproof member (520) is disposed between the valve seat (110) and the inner wall of the valve body (100); An elastic member (530) is disposed between the filler (510) and the dustproof ring; Wherein, a first extrusion ring (540) and a second extrusion ring (550) are respectively arranged between the elastic member (530) and the filler (510) and between the elastic member (530) and the dustproof member (520).

6. A self-tightening sealing ball valve according to claim 5, characterized in that: One end of the first extrusion ring (540) in contact with the filler (510) is provided with a first guide protrusion (560) protruding toward the middle; One end of the second extrusion ring (550) that contacts the dustproof member (520) is provided with a second guide protrusion (570) protruding toward the middle; Wherein, the cross-sections of the first guide protrusion (560) and the second guide protrusion (570) are both U-shaped.

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