Special pipeline ball valve for natural gas

Abstract

The utility model discloses a pipeline ball valve special for natural gas, which belongs to the technical field of natural gas ball valves and comprises a valve body and a plurality of bolts, connecting seats are mounted on two sides of the valve body, the two connecting seats are connected through the bolts, a valve component is arranged in the valve body, a rotating component is arranged at the top end of the valve component, and two compensation components are arranged in the valve body. The valve assembly comprises a valve rod, the bottom end of the valve rod is fixedly connected with a spherical valve element, the spherical valve element is located in the valve body, the compensation assemblies comprise telescopic springs, the compensation assemblies are arranged on the two sides of the spherical valve element, and sealing rings can be pushed to the surface of the spherical valve element all the time through the acting force of the telescopic springs so that the sealing rings can be tightly attached to the surface of the spherical valve element. When the sealing ring is worn and thinned, the telescopic spring can push the sealing ring to the surface of the spherical valve element all the time, so that the contact force between the sealing ring and the spherical valve element can be increased, self-adaptive sealing compensation is provided, the sealing performance is improved, and the service life of the sealing ring is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas ball valves, and more specifically, to a ball valve for special natural gas pipelines. Background Art

[0002] A ball valve is a common type of valve used to control the flow of fluids (liquids or gases) in pipelines. It gets its name from its spherical valve body, which serves to open and close the fluid passage inside the valve. A natural gas pipeline ball valve is a valve device used to control the flow of natural gas, consisting of a sphere and a rotatable valve stem. When the valve stem aligns with the sphere, natural gas can flow through the valve. When the valve stem rotates 90 degrees, the valve ball is sealed by the valve seat, preventing natural gas from passing through. Natural gas ball valves have higher requirements for sealing performance, and the sealing performance of the valve is crucial to prevent natural gas leakage.

[0003] The patent with the Chinese patent publication number CN220204739U discloses a gas ball valve. The inner wall of the valve body is rotatably connected with a valve ball. The top of the valve body is fixedly connected with a cover plate by bolts. The top of the cover plate is movably inlaid with a valve stem through a bearing. The bottom end of the valve stem is welded to the top of the valve ball. An emergency closing assembly is installed on the surface of the valve stem. A gas detection sensor is fixedly installed on the surface of the connecting pipe at the rear end, and a control box is installed on the surface of the connecting pipe at the front end. A wireless transmitter and an alarm are respectively fixedly connected to the top of the control box by screws, which can monitor gas leakage, give local alarms, and send remote reminders, reducing the existing risks and improving the practicability and safety of the gas ball valve.

[0004] Every time the ball valve is opened or closed, the spherical valve body will rub against the sealing ring. After long-term use, the sealing ring is prone to thinning due to friction. The ball valve in the above solution does not have a corresponding compensation device. The friction between the sphere and the sealing ring will cause wear and fatigue on the surface of the sealing ring. Over time, the sealing ring will become thinner and lose part of its sealing performance, thus affecting the sealing performance of the valve.

[0005] Therefore, it is necessary to provide a ball valve for special natural gas pipelines to solve the above problems. Summary of the Utility Model

[0006] The utility model provides a ball valve for special natural gas pipelines, which can improve the problems existing in the related technology that the friction between the sphere and the sealing ring will cause wear and fatigue on the surface of the sealing ring. Over time, the sealing ring will become thinner and lose part of its sealing performance, thus affecting the sealing performance of the valve.

[0007] The embodiment of the present application provides a ball valve for a natural gas special pipeline, which includes a valve body and a plurality of bolts. Connecting seats are installed on both sides of the valve body, and the two connecting seats are connected by the plurality of bolts. A valve component is arranged inside the valve body, a rotating component is arranged at the top of the valve component, and two compensation components are arranged inside the valve body. The valve component includes a valve stem, and a spherical valve core is fixedly connected to the bottom end of the valve stem. The spherical valve core is located inside the valve body. The compensation component includes a telescopic spring, and a sealing ring is installed at the outer end of the telescopic spring. The sealing ring abuts against the outer end of the spherical valve core.

[0008] In the above technical solution of the embodiment of the present application, it has at least the following technical effects: Compensation components are arranged on both sides of the spherical valve core. Through the acting force of the telescopic spring, the sealing ring can be continuously pushed towards the surface of the spherical valve core, making them closely adhere together. When the sealing ring wears and becomes thinner, since the telescopic spring will continuously push the sealing ring towards the surface of the spherical valve core, the contact force between the sealing ring and the spherical valve core will be increased, providing adaptive sealing compensation, improving the sealing performance, and extending the service life of the sealing ring.

[0009] In some embodiments, the valve component further includes a mounting seat, which is fixedly connected to the outer end of the valve body and is in communication with the inside of the valve body. A mounting sleeve is threadedly connected to the top end of the mounting seat.

[0010] In some embodiments, a washer is arranged at the bottom end of the mounting sleeve. The valve stem sequentially penetrates through the valve body, the washer and the mounting sleeve and extends to the outside. A fixing nut is threadedly connected to the top end of the valve stem.

[0011] In some embodiments, the compensation component further includes a housing, which is fixedly installed on the inner wall of the valve body. The end of the telescopic spring away from the sealing ring is fixedly connected to the inner wall of the housing. The housing is hollow and is in communication with the valve body.

[0012] In some embodiments, the rotating component includes a wrench. An installation groove is opened at the outer end of the wrench. The wrench is adapted to the top end of the valve stem, and the wrench is installed at the top end of the valve stem through the installation groove.

[0013] In some embodiments, two limiting blocks are fixedly connected to the outer end of the mounting seat, and two travel blocks are fixedly connected to the outer end of the mounting seat. An abutting block is fixedly connected to one end of the wrench, and the abutting block abuts against the travel block.

[0014] In some embodiments, a sliding groove is opened at the outer end of the wrench. A movable block is sleeved on the outer end of the wrench. The movable block is slidably connected to the sliding groove. A clamping block is fixedly connected to the outer end of the movable block. The clamping block is adapted to the limiting block. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 It is an exploded structure diagram of the present utility model;

[0018] Figure 3 It is a schematic diagram of the connection seat structure of the present utility model;

[0019] Figure 4 It is a schematic diagram of the rotation assembly structure of the present utility model;

[0020] Figure 5 It is an exploded structure diagram of the valve assembly of the present utility model.

[0021] Explanation of the reference numerals in the figure:

[0022] 1, valve body;

[0023] 2, connection seat;

[0024] 3, rotation assembly; 31, wrench; 32, chute; 33, installation groove; 34, abutting block; 35, clamping block; 36, movable block;

[0025] 4, bolt;

[0026] 5, compensation assembly; 51, housing; 52, telescopic spring; 53, sealing ring;

[0027] 6, limiting block;

[0028] 7, travel block;

[0029] 8, valve assembly; 81, installation sleeve; 82, washer; 83, valve stem; 84, fixing nut; 85, spherical valve core; 86, installation seat. Specific embodiments

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "comprising" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0032] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0035] In this application, "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist; for example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0036] It should be noted that in this application, words such as "in some embodiments", "exemplarily", and "for example" are used to give examples, illustrations, or explanations. Any embodiment or design described as "in some embodiments", "exemplarily", or "for example" in this application should not be construed as being more preferred or having more advantages than other embodiments or designs. Rather, the use of words such as "in some embodiments", "exemplarily", and "for example" is intended to present relevant concepts in a specific manner, meaning that the specific features, structures, or characteristics described in connection with the embodiments may be included in at least one embodiment of this application. The appearance of the above words at various positions in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments 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.

[0037] A ball valve is a common type of valve used to control the flow of fluids (liquids or gases) in pipelines, and natural gas ball valves have higher requirements for sealing performance.

[0038] There is a passage inside the valve ball, called a flow channel or passage, and the flow of the fluid is controlled by rotating the sphere. Each time the ball valve is opened or closed, the spherical valve body will rub against the sealing ring. After long-term use, the sealing ring is likely to become thinner due to friction. When the sealing ring becomes thinner, it will not be able to fit tightly with the ball valve, losing part of its sealing performance, thus affecting the sealing performance of the valve and easily causing gas leakage.

[0039] Based on this, it is possible to improve the problem in the related art that the friction between the sphere and the sealing ring will cause wear and fatigue on the surface of the sealing ring. Over time, the sealing ring will become thinner, losing part of its sealing performance, thus affecting the sealing performance of the valve.

[0040] Please refer to Figures 1 - 5 , a special pipeline ball valve for natural gas, including a valve body 1 and a plurality of bolts 4. Connecting seats 2 are installed on both sides of the valve body 1, and the two connecting seats 2 are connected by a plurality of bolts 4. A valve assembly 8 is arranged inside the valve body 1, a rotating assembly 3 is arranged at the top of the valve assembly 8, two compensation assemblies 5 are arranged inside the valve body 1. The valve assembly 8 includes a valve stem 83, and a spherical valve core 85 is fixedly connected to the bottom end of the valve stem 83. The spherical valve core 85 is located inside the valve body 1. The compensation assembly 5 includes a telescopic spring 52, and a sealing ring 53 is installed at the outer end of the telescopic spring 52. The sealing ring 53 abuts against the outer end of the spherical valve core 85.

[0041] The device in this solution is mainly used for the valve in the natural gas pipeline. Connecting seats 2 are installed on both sides of the valve body 1, which can be connected by welding. At the same time, the two connecting seats 2 are tightly connected by four bolts 4, and are connected by matching nuts with the bolts 4. The connecting seats 2 are mainly used to connect the pipelines. A valve assembly 8 is arranged inside the valve body 1, and the valve assembly 8 is mainly used to control the switch. A rotating assembly 3 is arranged at the top of the valve assembly 8, and the rotating assembly 3 is mainly used to control the rotation of the valve assembly 8. Compensation assemblies 5 are arranged on both sides of the spherical valve core 85. Through the acting force of the telescopic spring 52, the sealing ring 53 can be continuously pushed towards the surface of the spherical valve core 85 to make them closely adhere together. When the sealing ring 53 wears and becomes thinner, the contact force between the sealing ring 53 and the spherical valve core 85 will increase, providing adaptive sealing compensation, improving the sealing performance, and extending the service life of the sealing ring 53.

[0042] Optionally, in some embodiments, please refer to Figure 2 and Figure 5 , the valve assembly 8 further includes a mounting seat 86. The mounting seat 86 is fixedly connected to the outer end of the valve body 1 and is in communication with the inside of the valve body 1. An installation sleeve 81 is threadedly connected to the top of the mounting seat 86.

[0043] A washer 82 is arranged at the bottom end of the installation sleeve 81. The valve stem 83 sequentially passes through the valve body 1, the washer 82 and the installation sleeve 81 and extends to the outside. A fixing nut 84 is threadedly connected to the top end of the valve stem 83.

[0044] The above-mentioned mounting seat 86 is fixed to the outer end of the valve body 1 and is in communication with its inside. A spherical valve core 85 is fixed to the bottom end of the valve stem 83 arranged inside the mounting seat 86. There is a hole inside the spherical valve core 85, which is called a flow channel or passage. When the hole is parallel to the valve body 1, the inside of the pipeline is in an open state. When the hole is perpendicular to the valve body 1, it is in a closed state. An installation sleeve 81 is threadedly connected to the top of the mounting seat 86. A washer 82 is installed at the bottom end of the installation sleeve 81. The installation sleeve 81 is mainly used to install the valve stem 83, while the washer 82 is used for sealing to prevent the internal gas from flowing out of the mounting seat 86. At the same time, the top end of the valve stem 83 extending to the outside part is not only provided with threads but also in a flat state, so that not only can a fixing nut 84 be threadedly connected, but also a wrench 31 can be installed on it, and the wrench 31 can be fixed through the fixing nut 84.

[0045] Optionally, in some embodiments, please refer to Figure 5 , the compensation assembly 5 further includes a housing 51. The housing 51 is fixedly installed on the inner wall of the valve body 1. One end of the telescopic spring 52 away from the sealing ring 53 is fixedly connected to the inner wall of the housing 51. The housing 51 is hollow and is in communication with the valve body 1.

[0046] The middle of the housing 51 is in a hollow state, and a partition layer is also provided. Without blocking the flow, the telescopic spring 52 can be installed in the partition layer. The housing 51 is fixed to the inner side wall of the valve body 1. At the other end of the telescopic spring 52, a sealing ring 53 is installed. The sealing ring 53 can be made of polytetrafluoroethylene. By tightly attaching the sealing ring 53 to the spherical valve core 85, sealing can be achieved to prevent leakage.

[0047] Optionally, in some embodiments, please refer to Figure 1 and Figure 4 , the rotating assembly 3 includes a wrench 31. An installation groove 33 is formed at the outer end of the wrench 31. The wrench 31 is adapted to the top end of the valve stem 83, and the wrench 31 is installed at the top end of the valve stem 83 through the installation groove 33.

[0048] Two limit blocks 6 are fixedly connected to the outer end of the mounting seat 86, and two travel blocks 7 are fixedly connected to the outer end of the mounting seat 86. One end of the wrench 31 is fixedly connected with an abutting block 34, and the abutting block 34 abuts against the travel block 7.

[0049] A sliding groove 32 is formed at the outer end of the wrench 31. A movable block 36 is sleeved on the outer end of the wrench 31. The movable block 36 is slidably connected to the sliding groove 32. A clamping block 35 is fixedly connected to the outer end of the movable block 36, and the clamping block 35 is adapted to the limit block 6.

[0050] In this solution, the wrench 31 is installed on the valve stem 83. An installation groove 33 is formed on the wrench 31. The installation groove 33 is square-shaped so that it can be sleeved on the top end of the valve stem 83 and then fixed with a fixing nut 84. A sliding groove 32 is also formed on the wrench 31. The sliding groove 32 is mainly used to enable the movable block 36 to slide on the wrench 31. A clamping block 35 is fixed to the bottom end of the movable block 36. The clamping block 35 is mainly used for limiting. Two limit blocks 6 are fixed on the mounting seat 86. The two limit blocks 6 are distributed at 90°. When in a static state, since the clamping block 35 is U-shaped, the clamping block 35 will be stuck on the limit block 6, making the wrench 31 unable to rotate. At the same time, two travel blocks 7 are also fixed on the mounting seat 86. The two travel blocks 7 are also distributed at 90°. An abutting block 34 is fixed to the tail end of the wrench 31. When the wrench 31 rotates, due to the restriction of the travel block 7 on the abutting block 34, the wrench 31 can only drive the valve stem 83 to rotate 90°, so as to control the rotation stroke. When it is necessary to rotate the wrench 31, first, the movable block 36 needs to be slid upward to disengage the clamping block 35 from the limit of the limit block 6 and then rotate the wrench 31.

[0051] Working principle: When using this device, it is first necessary to connect it to the gas pipeline through the connecting seat 2. At the bottom end of the valve stem 83 arranged inside the mounting seat 86, a spherical valve core 85 is fixed. There is a pore inside the spherical valve core 85. When the pore is parallel to the valve body 1, the inside of the pipeline is in an open state. When the pore is perpendicular to the valve body 1, it is in a closed state. The spherical valve core 85 is mainly controlled by the wrench 31. When it is necessary to turn the wrench 31, it is first necessary to slide the movable block 36 upward to disengage the latch 35 from the limit of the limit block 6 and then turn the valve body 1. Sealing rings 53 are arranged on both sides of the spherical valve core 85. When the sealing rings 53 are worn and thinned, the sealing rings 53 can be continuously pushed against the spherical valve core 85 tightly by the acting force of the telescopic spring 52, improving the sealing performance and extending the service life of the sealing rings 53.

[0052] The above is only the preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A ball valve for a natural gas pipeline, comprising a valve body (1) and a plurality of bolts (4), characterized in that: A connecting seat (2) is installed on both sides of the valve body (1), and the two connecting seats (2) are connected by a plurality of bolts (4). A valve assembly (8) is arranged inside the valve body (1), and a rotating assembly (3) is arranged at the top of the valve assembly (8). Two compensation assemblies (5) are arranged inside the valve body (1); The valve assembly (8) comprises a valve stem (83), the bottom end of which is fixedly connected to a spherical valve core (85), and the spherical valve core (85) is located inside the valve body (1); The compensation component (5) comprises a telescopic spring (52), a sealing ring (53) is installed on the outer end of the telescopic spring (52), and the sealing ring (53) abuts against the outer end of the spherical valve core (85).

2. The natural gas pipeline ball valve according to claim 1 is characterized in that: The valve assembly (8) further comprises a mounting seat (86), wherein the mounting seat (86) is fixedly connected to the outer end of the valve body (1), and the mounting seat (86) is communicated with the interior of the valve body (1), and a mounting sleeve (81) is threadedly connected to the top end of the mounting seat (86).

3. The natural gas pipeline ball valve according to claim 2 is characterized in that: A gasket (82) is provided at the bottom end of the mounting sleeve (81); the valve stem (83) passes through the valve body (1), the gasket (82) and the mounting sleeve (81) in sequence and extends to the outside; a fixing nut (84) is threadedly connected to the top end of the valve stem (83).

4. The natural gas pipeline ball valve according to claim 1 is characterized in that: The compensation component (5) further comprises a shell (51), wherein the shell (51) is fixedly mounted on the inner wall of the valve body (1), and one end of the telescopic spring (52) away from the sealing ring (53) is fixedly connected to the inner wall of the shell (51), and the shell (51) is hollow and communicates with the valve body (1).

5. The natural gas pipeline ball valve according to claim 2 is characterized in that: The rotating assembly (3) comprises a wrench (31), an outer end of which is provided with a mounting groove (33), the wrench (31) is adapted to the top end of the valve stem (83), and the wrench (31) is mounted on the top end of the valve stem (83) through the mounting groove (33).

6. The natural gas pipeline ball valve according to claim 5 is characterized in that: The outer end of the mounting seat (86) is fixedly connected to two limit blocks (6), and the outer end of the mounting seat (86) is fixedly connected to two travel blocks (7); one end of the wrench (31) is fixedly connected to an abutment block (34), and the abutment block (34) abuts against the travel block (7).

7. The natural gas pipeline ball valve according to claim 6 is characterized in that: The outer end of the wrench (31) is provided with a sliding groove (32), the outer end of the wrench (31) is sleeved with a movable block (36), the movable block (36) is slidably connected to the sliding groove (32), the outer end of the movable block (36) is fixedly connected with a clamping block (35), and the clamping block (35) is adapted to the limit block (6).

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