A new type of butterfly valve shaft assembly

Abstract

The utility model relates to butterfly valve shaft technical field discloses a valve shaft subassembly of novel butterfly valve, including valve body, the inside front side of valve body is installed butterfly plate, the rear side fixedly connected with the shaft sleeve of butterfly plate, the inside sliding connection of shaft sleeve has the valve shaft, the inside installation of shaft sleeve has locking assembly, the locking assembly includes the connection fixed link of up and down distribution, the inside sliding connection of connection fixed link in the shaft sleeve, the rear end fixedly connected with the pull ring of connection fixed link, the outer periphery front side sliding connection of connection fixed link has the limit block, the both sides bottom of limit block is fixedly connected with the limit board, the both sides bottom of limit block is fixedly connected with the spring, in the utility model, by the locking assembly of shaft sleeve and valve shaft sliding connection cooperation, then by the fixed hole cooperation of connection fixed link realizes quick lock solution, and the stable guarantee of limit structure and spring does not need repeatedly to disassemble bolt, shortens the replacement time, avoids the influence precision.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve shaft technology, and in particular to a novel butterfly valve shaft assembly. Background Technology

[0002] Butterfly valves are widely used regulating and shut-off devices in fluid pipeline systems. As a type of valve with a compact structure and rapid opening and closing, butterfly valves are widely used in water supply and drainage, sewage treatment, petrochemical, metallurgy, power and other industrial fields due to their small size, light weight and low flow resistance. They are one of the key devices in modern pipeline systems to realize fluid on / off and flow regulation.

[0003] Common butterfly valves mainly consist of components such as valve body, flange, valve shaft, and butterfly plate. By rotating the valve shaft, the butterfly plate rotates within the flow channel of the valve body. When the butterfly plate is parallel to the flow channel, the valve is fully open; when it is perpendicular, the valve is fully closed. Different rotation angles correspond to different flow areas to adjust the flow rate, which is convenient for automated control and is especially suitable for large-diameter pipeline systems.

[0004] However, the valve shaft and butterfly plate of common butterfly valve components will wear out after long-term use. When replacing them, they are usually fixed with bolts. Bolting is not only time-consuming, but repeated replacements may also affect the accuracy of use. In addition, when the equipment drive device and valve shaft have problems and cannot be fixed, there is a lack of convenient temporary locking structure, which makes it impossible to quickly fix the butterfly plate at a specific opening, increasing the difficulty of emergency handling and safety risks. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a novel valve shaft assembly for a butterfly valve, aiming to improve the problems of long replacement time for valve shaft and butterfly plate and lack of convenient temporary locking structure in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A novel butterfly valve shaft assembly includes a valve body, with flanges fixedly connected to both the front and rear sides of the valve body. A butterfly plate is installed inside the front side of the valve body, and a bushing is fixedly connected to the rear side of the butterfly plate. A valve shaft is slidably connected inside the bushing, and a locking component is installed inside the bushing. The locking assembly includes vertically distributed connecting and fixing rods, which are slidably connected inside the bushing. A pull ring is fixedly connected to the rear end of the connecting and fixing rod. A limit block is slidably connected to the front outer periphery of the connecting and fixing rod. Limit plates are fixedly connected to the bottom of both the left and right sides of the limit block. Springs are fixedly connected to the bottom left and right sides of the limit block. As a further description of the above technical solution: The bottom of the valve body is fixedly connected to a limiting connecting sleeve, the bottom end of the valve shaft is slidably connected to the limiting connecting sleeve, the bottom of the limiting connecting sleeve is threadedly connected to a fixing plate, the bottom of the fixing plate is threadedly connected to a sealing cover, the bottom of the fixing plate is slidably connected to a locking pin, the other end of the locking pin is slidably connected to the bottom of the valve shaft, and a threaded hole is opened on the bottom side of the valve shaft. As a further description of the above technical solution: A drive connection sleeve is fixedly connected to the top of the valve body, and a flange is fixedly connected to the top of the drive connection sleeve. As a further description of the above technical solution: The fixed plate has a locking groove 1 on the bottom left and front sides, and the valve shaft has a locking groove 2 on the bottom left and front sides. The locking pin is slidably connected in the locking groove 1 and locking groove 2 on the left side. As a further description of the above technical solution: The bushing has two fixing holes, one vertically distributed on each side, and the valve shaft has two fixing holes, one vertically distributed in the middle. The connecting fixing rod is slidably connected in the fixing holes one and two. As a further description of the above technical solution: The right end of the connecting fixing rod is provided with an installation groove, the limiting block is slidably connected in the installation groove, and the other end of the spring is fixedly connected in the installation groove; As a further description of the above technical solution: The right end of the connecting fixing rod is provided with left and right distributed limiting grooves, and the limiting plate is slidably connected in the limiting grooves; As a further description of the above technical solution: The top of the bushing has a shaft groove, and the valve shaft is slidably connected in the middle of the shaft groove.

[0007] This utility model has the following beneficial effects: 1. In this utility model, quick disassembly and assembly are achieved through the sliding connection between the bushing and the valve shaft and the locking component. The connecting fixing rod can quickly lock and unlock the bushing and the valve shaft through the cooperation of fixing hole one and fixing hole two. The synergistic effect of the limit block, the limit plate and the spring ensures the stability of the connection. There is no need to repeatedly disassemble the bolts, which greatly shortens the replacement time of the valve shaft and the butterfly plate. At the same time, it avoids the impact of multiple bolt disassembly and assembly on the precision of the components, improves maintenance efficiency and the service life of the components.

[0008] 2. In this utility model, a locking groove 1, a locking groove 2 and a locking pin are designed to cooperate between the fixed plate and the bottom of the valve shaft. When the drive device or valve shaft has a fixing problem, the valve shaft and the fixed plate can be temporarily locked by sliding the locking pin into the corresponding locking groove, which can quickly fix the butterfly plate at a specific opening degree, reduce the difficulty of emergency handling, reduce the safety risks caused by the loss of control of the butterfly plate position, and improve the reliability of equipment operation. Attached Figure Description

[0009] Figure 1 This is a three-dimensional schematic diagram of the valve shaft assembly of a novel butterfly valve proposed in this utility model. Figure 2 This is a schematic diagram of the flange of a novel butterfly valve shaft assembly proposed in this utility model. Figure 3 This is a schematic diagram of the bushing structure of the valve shaft assembly of a novel butterfly valve proposed in this utility model. Figure 4 This is a schematic diagram of the valve shaft structure of a novel butterfly valve assembly proposed in this utility model. Figure 5 This is a schematic diagram of the connecting and fixing rod of the valve shaft assembly of a novel butterfly valve proposed in this utility model. Figure 6 This is a schematic diagram of the fixing disc of the valve shaft assembly of a novel butterfly valve proposed in this utility model.

[0010] Legend: 1. Valve body; 2. Flange 1; 3. Valve shaft; 4. Shaft groove; 5. Butterfly plate; 6. Shaft sleeve; 7. Fixing hole 1; 8. Fixing hole 2; 9. Connecting fixing rod; 10. Pull ring; 11. Spring; 12. Limit block; 13. Limit plate; 14. Limit groove; 15. Mounting groove; 16. Drive connecting sleeve; 17. Flange 2; 18. Limit connecting sleeve; 19. Fixing plate; 20. Sealing cover; 21. Threaded hole; 22. Lock groove 1; 23. Lock groove 2; 24. Locking pin. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] Reference Figures 1-6This utility model provides an embodiment of a novel butterfly valve shaft assembly, comprising a valve body 1, which is the main frame of the entire assembly. Flanges 2 are fixedly connected to both the front and rear sides of the valve body 1, connecting the valve body 1 to an external piping system. A butterfly plate 5 is installed on the front side inside the valve body 1. The butterfly plate 5 is the core component controlling fluid flow and its shape is adapted to the internal flow channel of the valve body 1. By rotating it, the relative angle with the flow channel is changed, achieving precise fluid control. A bushing 6 is fixedly connected to the rear side of the butterfly plate 5, serving to connect the butterfly plate 5. The valve shaft 3 is used to ensure that the butterfly plate 5 and the valve shaft 3 rotate synchronously. The valve shaft 3 is slidably connected inside the bushing 6. The valve shaft 3 is a key component for transmitting rotational force. It facilitates the quick assembly and disassembly of the valve shaft 3 and the bushing 6, and ensures that the valve shaft 3 drives the bushing 6 and the butterfly plate 5 to move synchronously when it rotates. The top of the valve body 1 is fixedly connected to the drive connecting sleeve 16. The drive connecting sleeve 16 is used to install an external drive device. The top of the drive connecting sleeve 16 is fixedly connected to the flange 17. The flange 17 is used to fix the drive device to the drive connecting sleeve 16. The bushing 6 is equipped with a locking component. The locking assembly includes vertically distributed connecting rods 9, which are slidably connected inside the bushing 6. The connecting rods 9 are the core force-bearing components of the locking assembly. The vertically distributed design makes the force on the bushing 6 and valve shaft 3 more even, avoiding component deformation caused by single-point force and enhancing the reliability of the connection. A pull ring 10 is fixedly connected to the rear end of the connecting rod 9, providing a force application point for the operator. A limit block 12 is slidably connected to the front outer periphery of the connecting rod 9. The limit block 12 is used to limit the position of the connecting rod 9 and prevent it from moving accidentally during operation. Limit plates 13 are fixedly connected to the bottom of the left and right sides of the limit block 12. The limit plates 13 are used to limit the movement direction of the limit block 12 and prevent the limit block 12 from deviating during sliding. Springs 11 are fixedly connected to the bottom left and right sides of the limit block 12. The springs 11 provide elastic force to the limit block 12 and push the limit block 12 out in its natural state. Reference Figure 2 and Figure 6A limiting sleeve 18 is fixedly connected to the bottom of the valve body 1. The bottom end of the valve shaft 3 is slidably connected inside the limiting sleeve 18. The limiting sleeve 18 is used to support and limit the bottom end of the valve shaft 3. A fixing plate 19 is threadedly connected to the bottom of the limiting sleeve 18. The fixing plate 19 can both close the bottom opening of the limiting sleeve 18 to prevent impurities from entering and affecting the rotation of the valve shaft 3, and provide an installation base for the temporary locking structure. A sealing cover 20 is threadedly connected to the bottom of the fixing plate 19. The sealing cover 20 further enhances the sealing performance of the bottom of the limiting sleeve 18. A locking pin 24 is slidably connected to the bottom of the fixing plate 19. The locking pin 24 allows the operator to quickly insert or pull it out of the locking position to achieve temporary locking and unlocking of the valve shaft 3. The operation is simple and efficient, and it is suitable for emergency use. The other end of the locking pin 24 is slidably connected to the bottom of the valve shaft 3. The locking pin 24 can fix the position of the valve shaft 3 by connecting the fixing plate 19 to the bottom of the valve shaft 3, thereby restricting the rotation of the butterfly plate 5 and achieving locking of a specific opening degree. A threaded hole 21 is provided on the bottom side of the valve shaft 3. The threaded hole 21 can be used to install auxiliary fixing parts or detection elements. If further reinforcement is required, it can be achieved by screwing a bolt into the threaded hole 21. Locking groove 1 22 is provided on the left side and the front side of the bottom of the fixing plate 19, and locking groove 23 is provided on the left side and the front side of the bottom of the valve shaft 3. The locking pin 24 is slidably connected in the left locking groove 1 22 and the left locking groove 23. The sliding engagement of the locking pin 24 in the locking groove 1 22 and the locking groove 23, through the fixing relationship between the fixing plate 19 and the limiting connecting sleeve 18, achieves temporary locking of the valve shaft 3.

[0013] Reference Figure 4 and Figure 5 The top of the bushing 6 has a shaft groove 4, and the middle part of the valve shaft 3 is slidably connected in the shaft groove 4. The shaft groove 4 provides a space for the middle part of the valve shaft 3 and also acts as a radial limit for the valve shaft 3. The bushing 6 has vertically distributed fixing holes 7 on both the left and right sides, and the valve shaft 3 has vertically distributed fixing holes 8 in the middle. The connecting fixing rod 9 is slidably connected in the fixing holes 7 and 8. The fixing holes 7 and 8 provide through channels for the connecting fixing rod 9. The vertically distributed design allows the connecting fixing rod 9 to bear the torque evenly and avoids the bushing 6 from contacting the valve shaft. The connection of 3 becomes loose due to concentrated force. The right end of the connecting fixing rod 9 has an installation groove 15, which provides installation space for the limiting block 12 and the spring 11. The limiting block 12 is slidably connected in the installation groove 15, and the other end of the spring 11 is fixedly connected in the installation groove 15. The right end of the connecting fixing rod 9 has left and right distributed limiting grooves 14, and the limiting plate 13 is slidably connected in the limiting grooves 14. The limiting grooves 14 provide a sliding track for the limiting plate 13, restricting the limiting plate 13 to move only in the left and right directions, and preventing the limiting block 12 from deviating during movement.

[0014] Working principle: When it is necessary to replace the valve shaft 3 or the butterfly plate 5, press down the limiting block 12 and pull the pull ring 10 to move the connecting fixing rod 9. The limiting block 12 retracts into the mounting groove 15 under the action of the compression spring 11. The connecting fixing rod 9 is pulled out from the fixing hole 1 7 and fixing hole 2 8, which can release the lock between the bushing 6 and the valve shaft 3, realize quick separation, and eliminate the need to remove the bolts, greatly simplifying the disassembly and assembly process. If the drive device or the valve shaft 3 has a fixing failure and it is necessary to temporarily lock the position of the butterfly plate 5, slide the locking pin 24 into the locking groove 1 22 of the fixing plate 19 and the locking groove 2 23 at the bottom of the valve shaft 3. The rigid connection between the fixing plate 19 and the limiting connecting sleeve 18 restricts the rotation of the valve shaft 3, and quickly fixes the butterfly plate 5 at a specific opening. The sealing cover 20 seals the bottom of the fixing plate 19 in non-emergency situations to ensure sealing performance. The threaded hole 21 can be used for auxiliary reinforcement or installation of testing components to further improve the reliability of maintenance and emergency handling.

[0015] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel butterfly valve stem assembly, comprising a valve body (1), characterized in that: The valve body (1) is fixedly connected to flanges (2) on both the front and rear sides. A butterfly plate (5) is installed on the front side inside the valve body (1). A bushing (6) is fixedly connected to the rear side of the butterfly plate (5). A valve shaft (3) is slidably connected inside the bushing (6). A locking component is installed inside the bushing (6). The locking assembly includes connecting and fixing rods (9) distributed vertically. The connecting and fixing rods (9) are slidably connected inside the bushing (6). A pull ring (10) is fixedly connected to the rear end of the connecting and fixing rods (9). A limit block (12) is slidably connected to the front side of the outer periphery of the connecting and fixing rods (9). Limit plates (13) are fixedly connected to the bottom of the left and right sides of the limit block (12). Springs (11) are fixedly connected to the bottom left and right sides of the limit block (12).

2. The valve shaft assembly of a novel butterfly valve according to claim 1, characterized in that: The valve body (1) is fixedly connected to a limiting connecting sleeve (18) at the bottom. The bottom end of the valve shaft (3) is slidably connected inside the limiting connecting sleeve (18). The bottom of the limiting connecting sleeve (18) is threadedly connected to a fixing plate (19). The bottom of the fixing plate (19) is threadedly connected to a sealing cover (20). The bottom of the fixing plate (19) is slidably connected to a locking pin (24). The other end of the locking pin (24) is slidably connected to the bottom of the valve shaft (3). A threaded hole (21) is opened on the bottom side of the valve shaft (3).

3. The valve shaft assembly of a novel butterfly valve according to claim 1, characterized in that: The top of the valve body (1) is fixedly connected to a drive connection sleeve (16), and the top of the drive connection sleeve (16) is fixedly connected to a flange (17).

4. The valve shaft assembly of a novel butterfly valve according to claim 2, characterized in that: The fixed plate (19) has a locking groove 1 (22) on the bottom left and front sides, and the valve shaft (3) has a locking groove 2 (23) on the bottom left and front sides. The locking pin (24) is slidably connected in the locking groove 1 (22) and locking groove 2 (23) on the left side.

5. The valve shaft assembly of a novel butterfly valve according to claim 1, characterized in that: The bushing (6) has a fixing hole 1 (7) distributed vertically on both the left and right sides, and a fixing hole 2 (8) distributed vertically in the middle of the valve shaft (3). The connecting fixing rod (9) is slidably connected in the fixing hole 1 (7) and the fixing hole 2 (8).

6. The valve shaft assembly of a novel butterfly valve according to claim 1, characterized in that: The right end of the connecting rod (9) is provided with an installation groove (15), the limiting block (12) is slidably connected in the installation groove (15), and the other end of the spring (11) is fixedly connected in the installation groove (15).

7. The valve shaft assembly of a novel butterfly valve according to claim 1, characterized in that: The right end of the connecting fixing rod (9) is provided with left and right distributed limiting grooves (14), and the limiting plate (13) is slidably connected in the limiting grooves (14).

8. The valve shaft assembly of a novel butterfly valve according to claim 1, characterized in that: The top of the bushing (6) is provided with a shaft groove (4), and the valve shaft (3) is slidably connected in the middle of the shaft groove (4).

Images