A stop valve with a bellows seal

Abstract

The utility model provides a kind of stop valve with bellows seal, including valve body, bellows, valve stem and hand wheel, bellows is sleeved in valve stem outside, and its upper and lower butt joint end head is connected with dismounting component, installation groove is equipped on valve body, and installation block is cooperatively arranged in installation groove, dismounting component is respectively installed at the bottom end of installation groove and rotationally installed at the bottom end of valve stem, and dismounting component includes multiple groups of butt flange that are arranged at the outer wall of butt joint end head with interval, the bottom side of one group of butt flange is symmetrically provided with butt wedge, and two groups of butt wedge are commonly slidably installed with butt disc.The utility model is combined by using butt flange and wedge locking mechanism, the function of bellows is quickly replaced by hand is realized, this design ingeniously utilizes the accurate cooperation of butt flange and the efficient locking characteristics of wedge locking, so that the replacement process of bellows becomes exceptionally simple and fast, in the operation process, user only needs to manually operate, and the replacement of bellows can be easily completed.

Description

Technical Field

[0001] This utility model belongs to the field of gate valve technology, and more specifically, it relates to a gate valve with a bellows seal. Background Technology

[0002] A gate valve with a bellows seal mainly consists of key components such as the valve body, valve cover, valve stem, bellows seal assembly, and handwheel. The valve body and valve cover are tightly connected by bolts to ensure the overall sealing performance of the valve. The valve stem passes through the valve cover and is connected to the valve core; rotating the valve stem controls the opening and closing of the valve. The bellows seal assembly is located between the valve stem and valve cover, utilizing the elastic deformation of the bellows to achieve a dynamic seal between the valve stem and valve cover, effectively preventing media leakage. The handwheel is fixed to the top of the valve stem for easy rotation by the operator.

[0003] Currently, the bellows gate valves widely used in the market mostly adopt a fixed connection method for their internal bellows design. Specifically, the bellows is firmly connected to the upper and lower bellows seats through welding. This structure makes it impossible to disassemble the bellows separately. Once the bellows is damaged or fails during use, maintenance personnel cannot replace just the bellows; they must replace the entire bellows assembly. This not only increases the complexity and difficulty of maintenance work but may also lead to higher maintenance costs and longer equipment downtime.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a stop valve with a bellows seal in order to achieve a more practical purpose. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a stop valve with a bellows seal, which is achieved by the following specific technical means:

[0006] A gate valve with a bellows seal includes a valve body, a bellows, a valve stem, and a handwheel. The bellows is sleeved on the outside of the valve stem, and its upper and lower mating ends are connected to disassembly and assembly components. The valve body has a mounting groove, and a mounting block is fitted inside the mounting groove. The disassembly and assembly components are respectively installed at the bottom end of the mounting groove and rotatably installed at the bottom end of the valve stem. The disassembly and assembly components include multiple sets of mating flanges spaced vertically on the outer wall of the mating ends. A mating wedge is symmetrically abutted on the bottom side of one set of mating flanges. Two sets of mating wedges are slidably mounted on a mating plate. The upper mating plate is fixedly connected to the bottom side of the mounting block, and the lower mating plate is rotatably connected to the outer wall of the bottom end of the valve stem. An unlocking component is provided on the mating plate.

[0007] Preferably, the corrugated pipe is made of metal and its outer wall has a reinforced pleated structure.

[0008] Preferably, the unlocking component includes a clearance groove formed on the top side of the docking wedge, an unlocking wedge is slidably mounted on the side wall of the clearance groove, a pressing unlocking ring is mounted on the top of the unlocking wedge, and a limiting block is mounted on the docking plate to limit the sliding distance of the pressing unlocking ring.

[0009] Preferably, a reference rod is rotatably fitted on the outer wall of the valve stem, and a reference plate is slidably mounted on one side of the reference rod, pointing to a reference scale, for indicating the lifting and lowering stroke of the valve stem.

[0010] Preferably, one end of the reference rod is equipped with a T-shaped slider, and the top of the reference plate is provided with a T-shaped through groove. The T-shaped slider is installed in the T-shaped through groove in a sliding manner. There are two sets of reference scales, which are distributed vertically and vertically, and are used to characterize the maximum length and minimum compressibility of the bellows from top to bottom.

[0011] Preferably, the top side of the docking plate is symmetrically provided with sliding grooves, and two sets of docking wedges are slidably installed in the corresponding sliding grooves. A guide shaft is installed on the side wall, and a spring is fitted on the outer wall of the guide shaft. The other end of the guide shaft is slidably installed on the side wall of the sliding groove.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model achieves the function of quick manual replacement of bellows by combining the mating flange and the wedge locking mechanism. This design cleverly utilizes the precise fit of the mating flange and the efficient locking characteristics of the wedge locking, making the bellows replacement process extremely simple and quick. During operation, the user can easily complete the replacement of the bellows by simply operating manually.

[0014] 2. This utility model is equipped with a pressing unlocking ring. The design of this unlocking ring is intended to achieve the function of one-click separation. When the bellows needs to be replaced, the user only needs to press the unlocking ring to quickly unlock the locking mechanism, thereby realizing the rapid separation of the bellows from the equipment. This design completely solves the problem of cutting when replacing the bellows in traditional welded structures, greatly simplifies the replacement process and improves work efficiency.

[0015] 3. This utility model forcibly limits the valve stem stroke by using upper and lower reference scales. The upper scale is used to prevent excessive stretching, and the lower scale is used to prevent crushing. This effectively avoids the risk of bellows damage caused by human error. This design not only improves the reliability and safety of the equipment, but also reduces maintenance costs and downtime losses. In summary, this utility model has significant advantages in bellows replacement and maintenance, providing a more efficient and convenient solution for related industries. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0017] Figure 2 This is a cross-sectional view of the utility model. Figure 1 .

[0018] Figure 3 This is a cross-sectional view of the utility model. Figure 2 .

[0019] Figure 4 This is a cross-sectional view of the utility model. Figure 3 .

[0020] Figure 5 yes Figure 4 Enlarged schematic diagram of structure A in the middle.

[0021] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0022] 1. Valve body; 2. Bellows; 3. Handwheel; 4. Mounting groove; 5. Mounting block; 6. Valve stem; 7. Reference scale; 8. Connecting end; 9. Connecting flange; 10. Connecting wedge; 11. Connecting disc; 12. Slide groove; 13. Spring; 14. Guide shaft; 15. Clearance groove; 16. Unlocking wedge; 17. Press-down unlocking ring; 18. Limit block; 19. Reference rod; 20. Reference plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Example:

[0025] As attached Figure 1 To be continued Figure 5 As shown:

[0026] This utility model provides a stop valve with a bellows seal, including a valve body 1, a bellows 2, a valve stem 6, and a handwheel 3. The bellows 2 is sleeved on the outside of the valve stem 6, and its upper and lower mating ends 8 are connected to disassembly and assembly components. The valve body 1 is provided with an installation groove 4, and an installation block 5 is provided in the installation groove 4. The disassembly and assembly components are respectively installed at the bottom end of the installation groove 4 and rotatably installed at the bottom end of the valve stem 6. The disassembly and assembly components include multiple sets of mating flanges 9 arranged at intervals on the outer wall of the mating ends 8. One set of mating flanges 9 is symmetrically abutted on the bottom side of ...

[0027] Among them, the bellows 2 is made of metal and its outer wall is provided with a reinforced pleated structure. The metal material improves the high temperature and high pressure resistance, and the reinforced pleated design enhances the elastic deformation capacity and structural strength of the bellows 2, extends the sealing life and improves the sealing reliability.

[0028] The unlocking component includes a clearance groove 15 on the top side of the docking wedge 10, an unlocking wedge 16 is slidably installed on the side wall of the clearance groove 15, a pressing unlocking ring 17 is installed on the top of the unlocking wedge 16, and a limiting block 18 is installed on the docking plate 11 to limit the sliding distance of the pressing unlocking ring 17. One-click separation is achieved by pressing the unlocking ring 17, and the locking mechanism can be quickly unlocked without tools. The limiting block 18 prevents excessive operation, simplifies the bellows replacement process, and solves the problem of cutting required for traditional welded structures.

[0029] The outer wall of the valve stem 6 is fitted with a reference rod 19, and a reference plate 20 is slidably mounted on one side of the reference rod 19, pointing to the reference scale 7. This is used to indicate the lifting and lowering stroke of the valve stem 6, providing real-time indication of the lifting and lowering stroke of the valve stem 6, and intuitively reflecting the extension and retraction status of the bellows 2. This facilitates precise control of the valve opening and closing degree by the operator and reduces human error.

[0030] One end of the reference rod 19 is equipped with a T-shaped slider, and the top of the reference plate 20 is provided with a T-shaped through groove. The T-shaped slider is installed in the T-shaped through groove in a sliding manner. There are two sets of reference scales 7, which are distributed vertically. From top to bottom, they are used to characterize the maximum length and minimum compressibility of the bellows 2, respectively, to ensure the stability of the sliding of the reference rod 19. The two sets of vertically distributed reference scales 7 limit the maximum tensile length and minimum compressibility of the bellows 2, respectively, to avoid damage to the bellows 2 due to excessive operation.

[0031] The mating disc 11 has symmetrically arranged grooves 12 on its top side. Two sets of mating wedges 10 are slidably installed in the corresponding grooves 12. A guide shaft 14 is installed on the side wall. A spring 13 is fitted on the outer wall of the guide shaft 14. The other end of the guide shaft 14 is slidably installed on the side wall of the groove 12. The guide shaft 14 guides the mating wedges 10 to slide precisely along the groove 12. The spring 13 provides a continuous locking force to ensure that the mating flange 9 and the mating wedges 10 automatically and tightly cooperate, thereby improving installation stability and sealing effect.

[0032] The working principle of this embodiment is as follows: Under normal operating conditions, the bellows 2 is sleeved on the outside of the valve stem 6. Its upper and lower mating ends 8 are connected to the valve body 1 and the valve stem 6 through the disassembly and assembly assembly. The mating flange 9 and the mating wedge 10 are tightly fitted along the sliding groove 12 under the action of the spring 13 to achieve a stable seal. The guide shaft 14 guides the sliding of the mating wedge 10. When the bellows 2 needs to be replaced, the mounting block 5 is removed, and then the pressing unlocking ring 17 is pressed down to push the unlocking wedge 16 to slide along the relief groove 15, so that the mating wedge 10 is disengaged from the mating flange 9, and the old bellows 2 can be removed by hand. When installing the new bellows 2, after the mating flange 9 is inserted into the mating plate 11, the mating wedge 10 automatically locks under the restoring force of the spring 13, and the limit block 18 restricts the excessive sliding of the pressing unlocking ring 17. When the valve stem 6 is raised and lowered, the reference rod 19 rotates synchronously with it and slides in the T-shaped through groove of the reference plate 20 through the T-shaped slider, pointing to the reference scale 7: the upper scale limits the maximum tensile length of the bellows 2, and the lower scale limits the minimum compression degree to prevent damage caused by excessive operation. The lower mating plate 11 is rotatably connected to the valve stem 6 to reduce the torsional wear of the bellows 2 during rotation.

[0033] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A stop valve with a bellows seal, comprising a valve body (1), a bellows (2), a valve stem (6), and a handwheel (3), characterized in that: The bellows (2) is sleeved on the outside of the valve stem (6), and its upper and lower mating ends (8) are connected to disassembly and assembly components. The valve body (1) is provided with an installation groove (4), and an installation block (5) is provided in the installation groove (4). The disassembly and assembly components are respectively installed at the bottom end of the installation groove (4) and rotatably installed at the bottom end of the valve stem (6). The disassembly and assembly components include multiple sets of mating flanges (9) arranged at intervals on the outer wall of the mating ends (8). A set of mating flanges (9) is symmetrically abutted on the bottom side of the bottom side of the bottom side of the set of mating flanges (9). The two sets of mating wedges (10) are slidably installed together with a mating plate (11). The bottom side of the upper mating plate (11) is fixedly connected to the bottom side of the installation block (5), and the bottom side of the lower mating plate (11) is rotatably connected to the bottom outer wall of the valve stem (6). The mating plate (11) is provided with an unlocking component.

2. The stop valve with bellows seal according to claim 1, characterized in that: The corrugated pipe (2) is made of metal and its outer wall is provided with a reinforced pleated structure.

3. The stop valve with bellows seal according to claim 1, characterized in that: The unlocking assembly includes a clearance groove (15) opened on the top side of the docking wedge (10), an unlocking wedge (16) is slidably installed on the side wall of the clearance groove (15), a pressing unlocking ring (17) is installed on the top of the unlocking wedge (16), and a limiting block (18) is installed on the docking plate (11) to limit the sliding distance of the pressing unlocking ring (17).

4. The stop valve with bellows seal according to claim 1, characterized in that: The outer wall of the valve stem (6) is fitted with a reference rod (19), and a reference plate (20) is slidably mounted on one side of the reference rod (19) and points to the reference scale (7) to indicate the lifting stroke of the valve stem (6).

5. The stop valve with bellows seal according to claim 4, characterized in that: One end of the reference rod (19) is equipped with a T-shaped slider, and the top of the reference plate (20) is provided with a T-shaped through groove. The T-shaped slider is installed in the T-shaped through groove in a sliding manner. There are two sets of reference scales (7), which are distributed vertically and vertically, and are used to characterize the maximum length and minimum compressibility of the bellows from top to bottom.

6. The stop valve with bellows seal according to claim 1, characterized in that: The top side of the docking plate (11) is symmetrically provided with a sliding groove (12). Two sets of docking wedges (10) are slidably installed in the corresponding sliding grooves (12), and a guide shaft (14) is installed on the side wall. A spring (13) is fitted on the outer wall of the guide shaft (14), and the other end of the guide shaft (14) is slidably installed on the side wall of the sliding groove (12).

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