Replacement structure of sealed all-welded ball valve seat

Abstract

The utility model relates to the technical field of sealing structures, in particular to a replacement structure of a sealing type all-welded ball valve seat. In order to solve the problems that an ultra-large-diameter all-welded ball valve is large in diameter, correspondingly large in size and relatively high in manufacturing cost, and the production cost is increased when the whole ball valve is replaced, the following technical scheme is provided: the ultra-large-diameter all-welded ball valve comprises two groups of positioning rings mounted on the inner wall of a valve body, and the two groups of positioning rings are symmetrically arranged on the two sides of a ball body; meanwhile, sealing rings are further arranged on the inner sides of the positioning rings, one sides of the sealing rings are attached to the ball body, and the two sealing rings are symmetrically arranged on the two sides of the ball body; the extrusion assembly is installed on the side, away from the ball body, of the sealing ring and used for driving the sealing ring to get close to and extrude the ball body. The extrusion assembly is detachably installed in the valve body. After the sealing ring is abraded, the sealing ring can be replaced in a targeted mode, the whole sealing ring does not need to be replaced, production and maintenance cost is reduced, good sealing performance is guaranteed, and production stability is maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing structures, in particular to a replacement structure for the seat of a sealed all-welded ball valve. Background Technique

[0002] Extra-large diameter all-welded ball valves usually refer to ball valves with relatively large diameters, which are used in pipeline systems to handle large-flow fluids or media. These extra-large diameter ball valves usually have diameters ranging from dozens of inches to even several meters, and are used to handle large-scale fluid transportation systems, such as natural gas pipelines, crude oil pipelines, water treatment systems, etc. The impact of the medium under high pressure or frequent valve operations will increase the wear of the valve seat, so that there will be liquid leakage after the valve is closed. At the same time, the valve body and the valve seat of the existing all-welded ball valve are integrated. In order to ensure the sealing performance of the pipeline, the whole valve needs to be replaced. However, due to the relatively large diameter of the extra-large diameter all-welded ball valve, the corresponding volume is large and the cost is relatively high, which increases the production cost during the overall replacement. In view of this, the utility model proposes a replacement structure for the seat of a sealed all-welded ball valve. Content of the Utility Model

[0003] The purpose of the utility model is to solve the problem in the background technique that the extra-large diameter all-welded ball valve has a relatively large diameter, a relatively large volume, a relatively high cost, and the production cost is increased during the overall replacement, and to propose a replacement structure for the seat of a sealed all-welded ball valve.

[0004] The technical solution of the utility model: A replacement structure for the seat of a sealed all-welded ball valve, including two groups of positioning rings installed on the inner wall of the valve body. The two groups of positioning rings are symmetrically arranged on both sides of the sphere. At the same time, a sealing ring is also arranged inside the positioning ring. One side of the sealing ring is attached to the sphere, and the two groups of sealing rings are symmetrically arranged on both sides of the sphere; an extrusion assembly installed on the side of the sealing ring away from the sphere for driving the sealing ring to approach and press the sphere. The extrusion assembly is detachably installed in the valve body; a support ring arranged inside the extrusion assembly for supporting the whole extrusion assembly.

[0005] Optionally, the extrusion assembly includes an installation groove, an installation ring, a connection block, a fixing sleeve, a sliding rod, and a pushing plate. The installation groove is opened in the valve body, and the installation ring is installed in the installation groove. The cross section of the installation ring is a T-shaped structure. A plurality of connection blocks are fixedly connected to the inner side of the installation ring, and the plurality of connection blocks are distributed in a circular array. The fixing sleeve is fixedly connected to the end of the connection block away from the installation ring. The sliding rod is slidably connected in the fixing sleeve, and one ends of the plurality of sliding rods close to the sealing ring are fixedly connected to the pushing plate together.

[0006] Optionally, the mounting ring is a circular ring composed of a first split ring, a second split ring, and a third split ring. Slots are provided at both ends of the first split ring. A clamping block corresponding to the slot is installed at one end of the second split ring close to the first split ring. Slots are also provided at one end of the second split ring close to the third split ring. Clamping blocks are fixedly connected to both ends of the third split ring.

[0007] Optionally, the push plate is arranged in a circular ring shape composed of three-segment sectors.

[0008] Optionally, the extrusion assembly further includes a spring, a positioning pin, and a limiting disc. The spring sleeved on the outer circle of the sliding rod is arranged between the fixed sleeve and the push plate. The positioning pin is slidably connected to the fixed sleeve and the sliding rod. The limiting disc is fixedly connected to the end of the sliding rod away from the push plate.

[0009] Optionally, the support ring is installed inside the sealing ring, and multiple groups of the push plates are slidably matched with the support ring. A sealing gasket is installed on the side of the support ring away from the sphere. Both the sealing ring and the sealing gasket are made of rubber.

[0010] Optionally, multiple groups of through holes are provided on the support ring. Fixed blocks are installed on the outer sides corresponding to the through holes. Screws are passed through the fixed blocks, and fixing seats are threadedly connected to the screws. Multiple groups of the fixing seats are fixedly connected to the inside of the mounting ring.

[0011] Optionally, rubber plugs are also arranged in the through holes.

[0012] Compared with the prior art, the utility model has the following beneficial technical effects:

[0013] Through the arrangement of multiple groups of springs, the utility model drives the push plate to push the sealing ring to extrude the sphere, thereby obtaining a good sealing effect and preventing liquid leakage, so that the valve has a good sealing effect;

[0014] Furthermore, through the arrangement of the mounting ring, it is convenient to install the mounting ring into the installation groove. At the same time, the support ring supports and limits the mounting ring, thereby facilitating the replacement of the sealing ring and reducing the production cost;

[0015] To sum up, the utility model can be replaced specifically after the sealing ring is worn, without the need for overall replacement, reducing the production and maintenance costs, ensuring good sealing performance, and maintaining production stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 shows a structural schematic diagram of a fully welded ball valve;

[0017] Figure 2 is Figure 1 the cross-sectional structural schematic diagram of;

[0018] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0019] Figure 4 a disassembled structural schematic view of the mounting ring;

[0020] Figure 5 is a structural schematic view of the support ring.

[0021] Reference numerals:

[0022] 1. Valve body; 11. Positioning ring;

[0023] 2. Sphere; 3. Sealing ring;

[0024] 4. Extrusion assembly; 41. Mounting groove; 42. Mounting ring; 43. Connecting block; 44. Fixed sleeve; 45. Slide bar; 46. Push plate; 47. Spring; 48. Positioning pin; 49. Limiting disc;

[0025] 421. First sub-ring; 422. Second sub-ring; 423. Third sub-ring; 424. Card slot; 425. Card block;

[0026] 5. Support ring; 51. Sealing gasket; 52. Through hole; 53. Fixed block; 54. Screw; 55. Fixed seat; 56. Rubber plug. Detailed implementation manners

[0027] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0028] Generally, the components of the embodiments of the present utility model described and shown in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model.

[0029] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] Embodiment

[0033] As Figure 1 and Figure 2 As shown, a replacement structure for the seat of a sealed fully welded ball valve proposed by the present utility model includes two groups of positioning rings 11 installed on the inner wall of the valve body 1. The two groups of positioning rings 11 are symmetrically arranged on both sides of the ball 2. At the same time, a sealing ring 3 is also arranged inside the positioning ring 11, and the positioning ring 11 is used to position the sealing ring 3. One side of the sealing ring 3 is in contact with the ball 2. The two groups of sealing rings 3 are symmetrically arranged on both sides of the ball 2. The sealing ring 3 is made of rubber material and is sealed after contacting the ball 2 to prevent liquid leakage.

[0034] Specifically, please refer to Figure 2-4, the above-mentioned sealing structure includes an extrusion assembly 4 installed on the side of the sealing ring 3 away from the sphere 2 for driving the sealing ring 3 to approach and press the sphere 2. The extrusion assembly 4 is detachably installed in the valve body 1, which is convenient to remove the extrusion assembly 4 to replace the sealing ring 3 and the extrusion assembly 4. The extrusion assembly 4 includes an installation groove 41, an installation ring 42, a connecting block 43, a fixing sleeve 44, a sliding rod 45, and a pushing plate 46. The installation groove 41 is opened in the valve body 1, and the installation ring 42 is installed in the installation groove 41. The cross-section of the installation ring 42 is a T-shaped structure, and the position of the installation ring 42 is fixed after installation. Multiple groups of connecting blocks 43 are fixedly connected to the inner side of the installation ring 42, and the multiple groups of connecting blocks 43 are distributed in a circular array. The fixing sleeve 44 is fixedly connected to the end of the connecting block 43 away from the installation ring 42, and the fixing sleeve 44 is fixed to the inner side of the installation ring 42 through the connecting block 43. The sliding rod 45 is slidably connected in the fixing sleeve 44. One ends of the multiple groups of sliding rods 45 close to the sealing ring 3 are fixedly connected to a pushing plate 46, and the sliding rod 45 and the pushing plate 46 move synchronously. The extrusion assembly 4 further includes a spring 47, a positioning pin 48, and a limiting disc 49. The spring 47 sleeved on the outer circle of the sliding rod 45 is arranged between the fixing sleeve 44 and the pushing plate 46. The spring 47 releases elastic force to drive the pushing plate 46 away from the fixing sleeve 44, so that the pushing plate 46 pushes the sealing ring 3 to approach the sphere 2 to enhance the sealing performance. The positioning pin 48 is slidably connected in the fixing sleeve 44 and the sliding rod 45. The positioning pin 48 is used to fix the position of the sliding rod 45 during installation. After the installation ring 42 is installed, the positioning pin 48 is removed and the spring 47 releases elastic force. The limiting disc 49 is fixedly connected to the end of the sliding rod 45 away from the pushing plate 46. The limiting disc 49 is used for limiting to prevent the positioning pin 48 from accidentally falling off and the spring 47 releasing elastic force to drive the sliding rod 45 to leave the position of the fixing sleeve 44. The installation ring 42 is a circular ring composed of a first split ring 421, a second split ring 422, and a third split ring 423. Both ends of the first split ring 421 are provided with card slots 424. One end of the second split ring 422 close to the first split ring 421 is installed with a card block 425 corresponding to the card slot 424. One end of the second split ring 422 close to the third split ring 423 is also provided with a card slot 424. Both ends of the third split ring 423 are fixedly connected with card blocks 425, so that the first split ring 421, the second split ring 422, and the third split ring 423 can be sequentially installed into the valve body 1 and cooperate with each other. The pushing plate 46 is arranged in a circular ring composed of three-segment sectors. The pushing plate 46 corresponds to the three parts of the installation ring 42, and the installation is realized synchronously.

[0035] Further, as Figure 3 and Figure 5As shown in the figure, the above sealing structure further includes a support ring 5 disposed inside the extrusion assembly 4 to support the entire extrusion assembly 4. The support ring 5 is installed inside the sealing ring 3, and multiple sets of push plates 46 are slidably engaged with the support ring 5 for supporting the push plates 46. A sealing gasket 51 is installed on the side of the support ring 5 away from the sphere 2. Both the sealing ring 3 and the sealing gasket 51 are made of rubber to prevent liquid from entering and corroding the components of the extrusion assembly 4. Multiple through holes 52 are formed in the support ring 5, and fixing blocks 53 are installed on the outer sides corresponding to the through holes 52. Screws 54 are inserted through the fixing blocks 53, and fixing seats 55 are threadedly connected to the screws 54. Multiple sets of fixing seats 55 are fixedly connected to the inside of the mounting ring 42, facilitating the connection of the support ring 5 and the mounting ring 42 into one body. At the same time, the support ring 5 supports the mounting ring 42 to ensure the stable position of the mounting ring 42. Rubber plugs 56 are also provided in the through holes 52 to prevent liquid from contacting and corroding the screws 54.

[0036] In this embodiment, when installing the sealing ring 3, the extrusion assembly 4, and the support ring 5, first, the sealing ring 3 is inserted into the valve body 1 so that one side of the sealing ring 3 fits against the sphere 2. Then, one side of the first split ring 421, the second split ring 422, and the third split ring 423 is placed into the valve body 1 and stuck at the installation groove 41 position. At this time, each positioning pin 48 is pulled out, so that the spring 47 releases elastic force to drive the push plate 46 away from the fixed sleeve 44. At this time, the push plate 46 pushes the sealing ring 3 closer to the sphere 2 to maintain good sealing performance. Then, the support ring 5 is installed into the valve body 1, and the outer side of the support ring 5 contacts the sealing ring 3 and the push plates 46. Rotate the support ring 5 so that the fixing blocks 53 on the support ring 5 correspond to the fixing seats 55 one by one, and insert the screws 54 through the fixing blocks 53 and threadedly connect them to the fixing seats 55. At this time, the support ring 5 supports the mounting ring 42. Finally, the rubber plugs 56 are inserted into the through holes 52 for sealing, completing the installation of the sealing ring 3, the extrusion assembly 4, and the support ring 5. At the same time, it is convenient to disassemble and replace when the sealing ring 3 is worn, reducing the production cost.

[0037] The above specific embodiments are merely an optional embodiment of the present invention. Based on the technical solution of the present invention and the relevant revelations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A replacement structure for the seat of a sealed fully welded ball valve, characterized in that, Including: Two groups of positioning rings (11) installed on the inner wall of the valve body (1). The two groups of positioning rings (11) are symmetrically arranged on both sides of the sphere (2). At the same time, a sealing ring (3) is also arranged inside the positioning ring (11). One side of the sealing ring (3) is attached to the sphere (2), and the two groups of sealing rings (3) are symmetrically arranged on both sides of the sphere (2); An extrusion assembly (4) installed on the side of the sealing ring (3) away from the sphere (2) for driving the sealing ring (3) to approach and extrude the sphere (2). The extrusion assembly (4) is detachably installed in the valve body (1); A support ring (5) arranged inside the extrusion assembly (4) to support the whole extrusion assembly (4).

2. The replacement structure of the seat of a sealed fully welded ball valve according to claim 1, characterized in that, The extrusion assembly (4) includes an installation groove (41), an installation ring (42), a connecting block (43), a fixing sleeve (44), a sliding rod (45), and a push plate (46). The installation groove (41) is opened in the valve body (1). The installation ring (42) is installed in the installation groove (41). The cross-section of the installation ring (42) is a T-shaped structure. Multiple groups of connecting blocks (43) are fixedly connected to the inside of the installation ring (42), and the multiple groups of connecting blocks (43) are arranged in a circular array. The fixing sleeve (44) is fixedly connected to the end of the connecting block (43) away from the installation ring (42). The sliding rod (45) is slidably connected in the fixing sleeve (44). One ends of the multiple groups of sliding rods (45) close to the sealing ring (3) are fixedly connected to the push plate (46) together.

3. The replacement structure of the seat of a sealed fully welded ball valve according to claim 2, characterized in that, The installation ring (42) is a circular ring composed of a first split ring (421), a second split ring (422), and a third split ring (423). Slots (424) are opened at both ends of the first split ring (421). A latch (425) corresponding to the slot (424) is installed at one end of the second split ring (422) close to the first split ring (421). Slots (424) are also opened at one end of the second split ring (422) close to the third split ring (423). Latches (425) are fixedly connected to both ends of the third split ring (423).

4. The replacement structure of a seat of a sealed all-welded ball valve according to claim 3, characterized in that, The push plate (46) is arranged in a circular ring shape composed of three-segment sectors.

5. The replacement structure of the seat of a sealed all-welded ball valve according to claim 4, characterized in that, The extrusion assembly (4) further includes a spring (47), a positioning pin (48), and a limit disc (49). The spring (47) sleeved on the outer circle of the sliding rod (45) is arranged between the fixing sleeve (44) and the push plate (46). The positioning pin (48) is slidably connected in the fixing sleeve (44) and the sliding rod (45). The limit disc (49) is fixedly connected to the end of the sliding rod (45) away from the push plate (46).

6. The replacement structure of the seat of a sealed all-welded ball valve according to claim 5, characterized in that, The support ring (5) is installed inside the sealing ring (3), and the multiple groups of push plates (46) are slidably matched with the support ring (5). A sealing gasket (51) is installed on the side of the support ring (5) away from the sphere (2). Both the sealing ring (3) and the sealing gasket (51) are made of rubber.

7. A replacement structure for a seat of a sealed all-welded ball valve according to claim 6, characterized in that, A plurality of groups of through holes (52) are formed in the support ring (5), fixing blocks (53) are installed on the outer sides at the corresponding positions of the through holes (52), screws (54) are inserted through the fixing blocks (53), fixing seats (55) are in threaded connection with the screws (54), and the plurality of fixing seats (55) are fixedly connected to the inner side of the mounting ring (42).

8. The replacement structure of a seat of a sealed all-welded ball valve according to claim 7, characterized in that Rubber plugs (56) are further arranged in the through holes (52).

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