Modular seal triple offset butterfly valve

Abstract

The utility model relates to sealing equipment technical field provides a modularization sealed three eccentric butterfly valve, including valve body, valve stem, valve seat, dish plate and bottom cover, the valve stem is along the radial of valve body and is set up on the valve body, the top of valve body is provided with the support, be provided with first connecting piece on the support, first connecting piece is used for connecting valve stem, the middle part of valve body is equipped with first installation groove, valve seat sets up in first installation groove, be provided with second connecting piece in first installation groove, second connecting piece is used for connecting valve seat, the side away from first installation groove of valve body is equipped with second installation groove, dish plate sets up in second installation groove, the bottom cover sets up in the one end of valve body away from the support, the utility model discloses can improve maintenance efficiency, reduce maintenance time.

Description

Technical Field

[0001] This utility model relates to the field of sealing equipment technology, and more specifically, to a modular sealing triple eccentric butterfly valve. Background Technology

[0002] The content in this section only provides background information related to this utility model and may not constitute prior art.

[0003] The triple-eccentric butterfly valve is a high-performance butterfly valve that achieves optimized sealing and operation through three eccentric structures: eccentric valve stem, eccentric valve seat, and eccentric conical sealing surface. This structure enables the valve to form a metal-to-metal sealing contact when closed, thereby achieving near-zero leakage under high temperature and high pressure conditions. At the same time, it can effectively reduce friction and wear during opening, extending the valve's lifespan.

[0004] Triple eccentric butterfly valves are mainly used in industrial applications where high sealing performance is required, such as petrochemical, power generation, water treatment, and marine systems. In these applications, valves need to handle high-temperature steam, corrosive chemicals, or high-pressure fluids. The design of triple eccentric butterfly valves can effectively address these application scenarios, providing higher safety and efficiency. They are often used to regulate or cut off the flow of media, especially in situations requiring frequent operation or harsh conditions, replacing traditional valves to reduce maintenance costs and the risk of downtime.

[0005] However, in practical applications, triple offset butterfly valves face complex media flow and high temperature and pressure environments. Although they have good sealing performance, they inevitably experience rapid wear during use, requiring replacement. Traditional triple offset butterfly valve replacements require complete disassembly, increasing maintenance time and reducing efficiency. Utility Model Content

[0006] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a modular sealing triple eccentric butterfly valve, which can improve maintenance efficiency and reduce maintenance time.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A modular sealing triple eccentric butterfly valve includes a valve body, a valve stem, a valve seat, a disc, and a bottom cover. The valve stem passes radially through the valve body. A bracket is provided on the top of the valve body, and a first connector is provided on the bracket for connecting the valve stem. A first mounting groove is formed in the middle of the valve body, and the valve seat is disposed in the first mounting groove. A second connector is provided in the first mounting groove for connecting the valve seat. A second mounting groove is formed on the side of the valve body away from the first mounting groove, and the disc is disposed in the second mounting groove. The bottom cover is located at the end of the valve body away from the bracket.

[0009] In some possible embodiments, the first connector is configured as an adapter sleeve, which is fixedly disposed on the top of the bracket and connected to the top of the valve stem. A first sealing assembly is provided between the bracket and the valve body, which is used to seal the gap between the bracket and the valve body.

[0010] In some possible embodiments, the first sealing assembly includes a packing assembly, a packing gland, and a packing pad. A packing groove is vertically formed at the top of the valve body. The packing assembly is disposed within the packing groove, and the packing pad is disposed at the bottom of the packing groove. A through hole is formed at the bottom of the support for the valve stem to pass through. One side of the packing assembly abuts against the valve stem, and the other side abuts against the inner wall of the packing groove. The packing gland is fitted onto the valve stem. A first sealing groove is formed at the bottom of the support. The through hole is located at the bottom of the first sealing groove. The bottom of the packing gland passes through the through hole and abuts against the top of the packing assembly. A sealing block is disposed within the first sealing groove and is fixedly disposed on the top of the packing gland.

[0011] In some possible embodiments, a bushing is fitted onto the valve stem, the top of which abuts against the bottom of the packing pad.

[0012] In some possible embodiments, the second connector is configured as a connecting bolt, the valve seat has a plurality of first connecting holes, the plurality of first connecting holes are evenly opened along the circumference of the valve seat, and a second connector is slidably inserted into each of the first connecting holes, and the valve body has a second connecting hole for threaded connection of the second connector.

[0013] In some possible embodiments, the valve body has a first receiving groove at the end away from the bracket, the bottom cover has a receiving block at the top, the receiving block is disposed in the receiving groove, the receiving block has a second receiving groove at the top, the second receiving groove is used for inserting the end of the valve stem away from the bracket, a split ring is disposed in the second receiving groove, the split ring is sleeved on the bottom end of the valve stem, the outer peripheral wall of the split ring abuts against the inner wall of the second receiving groove, and a second sealing assembly is disposed in the first receiving groove, the second sealing assembly is used to seal the gap between the valve stem, the valve body and the bottom cover.

[0014] In some possible embodiments, the second sealing assembly includes a thrust ring and a thrust seal. The thrust ring is sleeved on the valve stem, and the outer peripheral wall of the thrust ring forms a stepped shape. A second sealing groove is formed between the inner peripheral walls of the first receiving groove on the outer peripheral wall of the thrust ring. The thrust seal is disposed in the second sealing groove. The top of the thrust seal abuts against the thrust ring, and the bottom of the thrust seal abuts against the top of the bottom cover. The bottom of the thrust ring is inserted into the second receiving groove and abuts against the top of the split ring.

[0015] In some possible embodiments, a third sealing groove is provided at the opening of the second receiving groove, and a bottom cover seal is provided in the third sealing groove. The bottom cover seal is sleeved on the receiving block, and the bottom cover seal is used to seal the gap between the bottom cover and the valve body.

[0016] In summary, the technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0017] 1. By setting the valve seat as an independent module and fixing it to the first mounting groove of the valve body using circumferentially evenly distributed connecting bolts, the valve seat becomes an independent component that can be quickly disassembled and replaced. When the sealing surface is worn or damaged due to long-term use, it is not necessary to remove the entire valve from the pipeline or disassemble it on a large scale. The valve seat can be replaced simply by passing through the valve body channel, which significantly shortens the downtime of maintenance operations and reduces the complexity and labor costs of maintenance.

[0018] 2. The bottom end of the valve stem forms an integrated modular unit consisting of a bottom cover, a receiving block, a split ring, a thrust ring, and a thrust seal. The split ring not only achieves reliable axial positioning of the valve stem to prevent it from moving, but also effectively withstands the axial thrust generated by fluid pressure through the thrust ring. When maintenance of the bottom bearing or seal is required, the entire component can be removed simply by disassembling the bottom cover, making maintenance convenient and ensuring the long-term operational stability of this critical component under high pressure.

[0019] 3. A first sealing assembly consisting of a packing group, a packing gland, and a packing gasket is installed at the upper end of the valve stem, and a second sealing assembly consisting of a thrust ring and a thrust seal is installed at the lower end of the valve stem. A bottom cover seal is installed between the bottom cover and the valve body. These three independent sealing lines are respectively for the dynamic seal of the valve stem, the static seal at the bottom of the valve stem, and the static seal of the valve body, which together ensure that the valve can achieve long-term, stable, zero-leakage sealing under harsh conditions such as high temperature, high pressure, and corrosive media.

[0020] 4. The modular design allows for the quick and economical replacement of vulnerable parts such as valve seats and bottom bearing seals, greatly extending the service life of the valve body. At the same time, users can flexibly select valve seat modules and sealing modules of different materials and structures according to different media characteristics (such as temperature, pressure, and corrosivity), making the valve more versatile and applicable to a wider range of applications, thereby significantly improving the product's economy and market competitiveness. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0022] Figure 2 for Figure 1 AA section view in the middle;

[0023] Figure 3 for Figure 2 Enlarged view of part A in the image;

[0024] Figure 4 for Figure 2 Enlarged view of part B in the image.

[0025] Icons: 1. Valve body; 11. Valve stem; 12. Valve seat; 13. Disc; 14. Bottom cover; 2. Bracket; 21. First connector; 31. First mounting groove; 32. Second connector; 33. Second mounting groove; 4. First sealing assembly; 41. Packing assembly; 42. Packing gland; 43. Packing pad; 44. Packing groove; 45. Through hole; 46. First sealing groove; 47. Sealing block; 5. Bushing; 6. First receiving groove; 61. Receiving block; 62. Second receiving groove; 63. Split ring; 7. Second sealing assembly; 71. Thrust ring; 72. Thrust seal; 73. Second sealing groove; 8. Third sealing groove; 81. Bottom cover seal. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] The following is for reference Figures 1 to 4 The present invention will be described in further detail below.

[0028] Reference Figure 1 and Figure 2 A modular sealing triple eccentric butterfly valve includes a valve body 1, a valve stem 11, a valve seat 12, a disc 13, and a bottom cover 14.

[0029] Among them, the valve body 1, as the main pressure-bearing component of the valve, is made of WCB carbon steel, CF8 stainless steel or higher grade duplex stainless steel, etc., by casting or forging to have sufficient strength and resistance to media corrosion.

[0030] Reference Figure 1 and Figure 2 The valve stem 11 passes radially through the valve body 1 and is made of a material that combines high strength and excellent corrosion resistance, such as 17-4PH stainless steel. A bracket 2 is provided at the top of the valve body 1, and a first connector 21 is provided on the bracket 2 for connecting the valve stem 11. A first mounting groove 31 is provided in the middle of the valve body 1, and the valve seat 12 is disposed within the first mounting groove 31. A second connector 32 is provided within the first mounting groove 31 for connecting the valve seat 12. A second mounting groove 33 is provided on the side of the valve body 1 away from the first mounting groove 31, and a disc 13 is disposed within the second mounting groove 33. A bottom cover 14 is located at the end of the valve body 1 away from the bracket 2.

[0031] Reference Figure 2 and Figure 3 The first connecting member 21 is configured as an adapter sleeve, which is fixedly mounted on the top of the bracket 2 and connected to the top of the valve stem 11. A first sealing assembly 4 is provided between the bracket 2 and the valve body 1 to seal the gap between the bracket 2 and the valve body 1. As one embodiment of this utility model, the adapter sleeve and the top of the valve stem 11 can be fitted with a square hole or a spline to ensure effective torque transmission.

[0032] As one embodiment of this utility model, refer to Figure 2 and Figure 3The first sealing assembly 4 includes a packing group 41, a packing gland 42, and a packing pad 43. A packing groove 44 is vertically formed on the top of the valve body 1. The packing group 41 is disposed in the packing groove 44, and the packing pad 43 is disposed at the bottom of the packing groove 44. A through hole 45 is formed at the bottom of the bracket 2 for the valve stem 11 to pass through. One side of the packing group 41 abuts against the valve stem 11, and the other side abuts against the inner wall of the packing groove 44. The packing gland 42 is fitted onto the valve stem 11. A first sealing groove 46 is formed at the bottom of the bracket 2. The through hole 45 is formed at the bottom of the first sealing groove 46, and the bottom of the packing gland 42 passes through the through hole 45. The bottom of the packing gland 42 abuts against the top of the packing group 41. A sealing block 47 is disposed in the first sealing groove 46 and is fixedly disposed on the top of the packing gland 42.

[0033] As one possible embodiment of this utility model, the packing assembly 41 can be made of woven packing composed of flexible graphite rings, PTFE (polytetrafluoroethylene) rings, or combinations thereof, which has good self-lubricating and sealing performance. The packing pad 43 serves to support the packing and distribute pressure evenly.

[0034] Among them, reference Figure 3 As one embodiment of this utility model, a bushing 5 is fitted on the valve stem 11, and the top of the bushing 5 abuts against the bottom of the packing pad 43.

[0035] Reference Figure 1 In one embodiment of this utility model, the second connecting member 32 is configured as a connecting bolt. The valve seat 12 has several first connecting holes (not shown in the figure), which are evenly spaced along the circumference of the valve seat 12. A second connecting member 32 is slidably inserted into each first connecting hole. The valve body 1 has a second connecting hole (not shown in the figure) for threaded connection of the second connecting member 32. Bolt connection is a commonly used connection method in this field and is existing technology; therefore, it will not be described in detail here.

[0036] Reference Figure 2 and Figure 4 A first receiving groove 6 is provided at the end of the valve body 1 away from the bracket 2. A receiving block 61 is provided on the top of the bottom cover 14. The receiving block 61 is located in the receiving groove. A second receiving groove 62 is provided on the top of the receiving block 61. The second receiving groove 62 is used for inserting the end of the valve stem 11 away from the bracket 2. A split ring 63 is provided in the second receiving groove 62. The split ring 63 is sleeved on the bottom end of the valve stem 11. The outer peripheral wall of the split ring 63 abuts against the inner wall of the second receiving groove 62. A second sealing assembly 7 is provided in the first receiving groove 6. The second sealing assembly 7 is used to seal the gap between the valve stem 11, the valve body 1 and the bottom cover 14.

[0037] As one embodiment of this utility model, refer to Figure 4The second sealing assembly 7 includes a thrust ring 71 and a thrust seal 72. The thrust ring 71 is sleeved on the valve stem 11. The outer peripheral wall of the thrust ring 71 forms a stepped shape. A second sealing groove 73 is formed between the inner peripheral walls of the first receiving groove 6 on the outer peripheral wall of the thrust ring 71. The thrust seal 72 is disposed in the second sealing groove 73. The top of the thrust seal 72 abuts against the thrust ring 71, and the bottom of the thrust seal 72 abuts against the top of the bottom cover 14. The bottom of the thrust ring 71 is inserted into the second receiving groove 62 and abuts against the top of the split ring 63.

[0038] Reference Figure 4 A third sealing groove 8 is provided at the opening of the second receiving groove 62. A bottom cover 14 sealing element 81 is provided in the third sealing groove 8. The bottom cover sealing element 81 is sleeved on the receiving block 61 and is used to seal the gap between the bottom cover 14 and the valve body 1.

[0039] The implementation principle of the modular sealing triple eccentric butterfly valve proposed in this embodiment of the invention is as follows:

[0040] By setting the valve seat 12 as an independent module and fixing it to the first mounting groove 31 of the valve body 1 using circumferentially evenly distributed connecting bolts, the valve seat 12 becomes an independent component that can be quickly disassembled and replaced. When the sealing surface is worn or damaged due to long-term use, it is not necessary to remove the entire valve from the pipeline or disassemble it on a large scale. The valve seat 12 can be replaced simply by passing through the valve body 1 channel, which significantly shortens the downtime for maintenance operations and reduces the complexity and labor costs of maintenance.

[0041] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A modular sealing triple eccentric butterfly valve, characterized in that: The valve body includes a valve body (1), a valve stem (11), a valve seat (12), a disc (13), and a bottom cover (14). The valve stem (11) passes through the valve body (1) radially. A bracket (2) is provided on the top of the valve body (1). A first connector (21) is provided on the bracket (2). The first connector (21) is used to connect the valve stem (11). A first mounting groove (31) is provided in the middle of the valve body (1). The valve seat (12) is located in the first mounting groove (31). A second connector (32) is provided in the first mounting groove (31). The second connector (32) is used to connect the valve seat (12). A second mounting groove (33) is provided on the side of the valve body (1) away from the first mounting groove (31). The disc (13) is located in the second mounting groove (33). The bottom cover (14) is located at the end of the valve body (1) away from the bracket (2).

2. The modular sealing triple eccentric butterfly valve according to claim 1, characterized in that: The first connector (21) is configured as an adapter sleeve, which is fixedly installed on the top of the bracket (2). The adapter sleeve is connected to the top of the valve stem (11). A first sealing component (4) is provided between the bracket (2) and the valve body (1). The first sealing component (4) is used to seal the gap between the bracket (2) and the valve body (1).

3. A modular sealing triple eccentric butterfly valve according to claim 2, characterized in that: The first sealing assembly (4) includes a packing assembly (41), a packing gland (42), and a packing pad (43). A packing groove (44) is provided vertically at the top of the valve body (1). The packing assembly (41) is disposed in the packing groove (44), and the packing pad (43) is disposed at the bottom of the packing groove (44). A through hole (45) is provided at the bottom of the bracket (2). The through hole (45) is used for the valve stem (11) to pass through. One side of the packing assembly (41) abuts against the valve stem (11), and the other side is in contact with the packing. The inner wall of the groove (44) abuts against the valve stem (11), the packing gland (42) is sleeved on the valve stem (11), the bottom of the bracket (2) is provided with a first sealing groove (46), the through hole (45) is opened at the bottom of the first sealing groove (46), the bottom of the packing gland (42) passes through the through hole (45), the bottom of the packing gland (42) abuts against the top of the packing group (41), a sealing block (47) is provided in the first sealing groove (46), and the sealing block (47) is fixedly set on the top of the packing gland (42).

4. A modular sealing triple eccentric butterfly valve according to claim 3, characterized in that: A bushing (5) is fitted on the valve stem (11), and the top of the bushing (5) abuts against the bottom of the packing pad (43).

5. A modular sealing triple eccentric butterfly valve according to claim 1, characterized in that: The second connector (32) is configured as a connecting bolt. The valve seat (12) is provided with a plurality of first connecting holes. The plurality of first connecting holes are evenly opened along the circumference of the valve seat (12). The second connector (32) is slidably inserted in each of the first connecting holes. The valve body (1) is provided with a second connecting hole for the second connector (32) to be threaded.

6. A modular sealing triple eccentric butterfly valve according to claim 1, characterized in that: The valve body (1) has a first receiving groove (6) at the end away from the bracket (2). The bottom cover (14) has a receiving block (61) at the top. The receiving block (61) is located in the receiving groove. The receiving block (61) has a second receiving groove (62) at the top. The second receiving groove (62) is used for inserting the end of the valve stem (11) away from the bracket (2). The second receiving groove (62) has a split ring (63) in it. The split ring (63) is sleeved on the bottom end of the valve stem (11). The outer peripheral wall of the split ring (63) abuts against the inner wall of the second receiving groove (62). The first receiving groove (6) has a second sealing assembly (7) in it. The second sealing assembly (7) is used to seal the gap between the valve stem (11), the valve body (1), and the bottom cover (14).

7. A modular sealing triple eccentric butterfly valve according to claim 6, characterized in that: The second sealing assembly (7) includes a thrust ring (71) and a thrust seal (72). The thrust ring (71) is sleeved on the valve stem (11). The outer peripheral wall of the thrust ring (71) forms a stepped shape. A second sealing groove (73) is formed between the inner peripheral walls of the first receiving groove (6) of the outer peripheral wall of the thrust ring (71). The thrust seal (72) is disposed in the second sealing groove (73). The top of the thrust seal (72) abuts against the thrust ring (71), and the bottom of the thrust seal (72) abuts against the top of the bottom cover (14). The bottom of the thrust ring (71) is inserted into the second receiving groove (62) and abuts against the top of the split ring (63).

8. A modular sealing triple eccentric butterfly valve according to claim 6, characterized in that: A third sealing groove (8) is provided at the opening of the second receiving groove (62). A bottom cover seal (81) is provided in the third sealing groove (8). The bottom cover seal (81) is sleeved on the receiving block (61). The bottom cover seal (81) is used to close the gap between the bottom cover (14) and the valve body (1).

Images