Stop valve with high sealing performance

Through the design of ripples and filler components in the cut -off valve, the problem of insufficient sealing performance and large hidden safety hazards of the existing cut -off valve is solved, and high -secret sealability and safety are achieved, and the service life of the valve is prolonged.

CN222416327UActive Publication Date: 2025-01-28YANCHENG FAIR TRUEMARK VALVES
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Patent Information

Application Number
CN202421265280.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-05
Publication Date
2025-01-28
Estimated Expiration
2034-06-05

AI Technical Summary

Technical Problem

During use, existing shut-off valves have problems such as insufficient sealing performance, large safety hazards and short service life. In particular, local damage is prone to occur during the expansion and contraction of the bellows, resulting in media leakage.

Method used

A high -density sealing truncation valve is designed, which uses ripple tubes and filler components for sealing. The top and bottom of the ripple tube are set to set the pads and guide ring. Essence

Benefits of technology

The high sealing is realized, the media is not easy to leak during the medium transportation process, and the safety is high. It extends the working life of the ripple tube and improves the service life of the valve.

✦ Generated by Eureka AI based on patent content.

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    Figure CN222416327U_ABST
Patent Text Reader

Abstract

The utility model provides a high-sealing-performance stop valve which comprises a valve body, and an inlet flow channel, an outlet flow channel and a valve seat are arranged in the valve body. The valve cover is arranged at the upper end of the valve body, is used for sealing a top opening of an outlet flow channel and is connected with the valve body in a sealing manner; the lower part of the valve rod penetrates through the valve cover and is connected with a valve clack matched with the valve seat; the corrugated pipe is sleeved on the valve rod between the valve cover and the valve clack; the valve clack is arranged in the outlet flow channel and installed below the corrugated pipe, the valve clack comprises an upper clack body and a lower clack body, a Z-shaped connecting face is arranged between the upper clack body and the lower clack body, and a sealing ring is installed in the connecting face and locked and fixed through a screw; sealing bodies are arranged at the two ends of the upper petal body and abut against the inner wall of the outlet flow channel. The upper clack body is arranged to guide a medium, the corrugated pipe is basically not scoured by the medium, the service life of the corrugated pipe is prolonged, and the valve rod is provided with the expanding section to provide axial limit for opening of the valve clack.
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Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and in particular relates to a high-sealing stop valve. Background Art

[0002] The opening and closing parts of the stop valve are plug-shaped discs, with a flat or conical sealing surface, and the disc moves linearly along the center line of the valve seat. The valve stem of this type of valve has a relatively short opening or closing stroke, and has a very reliable shut-off function, and is suitable for regulating flow.

[0003] The existing stop valve has the following defects during its use: 1. The stop valve is provided with a bellows for secondary sealing of the valve to improve the sealing performance of the valve. However, during the expansion and contraction movement of the bellows, it is affected by the medium and impurities in the medium and is partially damaged. The medium is easy to leak, which will cause great safety hazards and affect the safety of the valve and shorten its service life; 2. The existing stop valve, by additionally setting a column and setting a number of scale lines on the outer wall of the column at intervals, so as to observe the opening and closing position of the valve, is inconvenient to install and has poor stability of the position indication. The technical problems mentioned above are urgently needed to be solved by those skilled in the art. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the utility model provides a high-sealing stop valve with mechanical limit, strong sealing and high safety.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high-sealing stop valve, comprising

[0007] A valve body, in which an inlet flow channel, an outlet flow channel and a valve seat for separating the inlet flow channel and the outlet flow channel are arranged;

[0008] A valve cover, which is arranged at the upper end of the valve body, is used to close the top opening of the outlet flow channel and is sealed with the valve body;

[0009] A valve stem, the lower part of which passes through the valve cover and is connected to a valve disc matched with a valve seat, and a valve disc cover is sleeved on the bottom end of the valve stem, and the valve disc cover is covered on the valve disc;

[0010] A bellows is sleeved on the valve stem between the valve cover and the valve disc. The top of the bellows is arranged between the valve body and the valve cover. A gasket is arranged on the top and bottom to form a static seal. The bottom of the bellows is provided with a guide ring, which is welded and fixed to the valve stem.

[0011] A valve flap, which is arranged in the outlet flow channel and installed below the bellows, comprises an upper flap body and a lower flap body, a Z-shaped connecting surface is arranged between the upper flap body and the lower flap body, a sealing ring is installed in the connecting surface and is locked and fixed by screws;

[0012] The upper valve body has sealing bodies arranged at both ends thereof, which abut against the inner wall of the outlet flow channel and move along the inner wall of the outlet flow channel with the valve stem.

[0013] In a preferred embodiment of the present invention, the inner wall of the outlet flow channel in contact with the upper valve body is vertical.

[0014] In a preferred embodiment of the utility model, a packing assembly is arranged on the top of the valve cover, and the packing assembly includes packing, a packing sleeve and a packing pressure plate. A packing groove is arranged on the top of the valve cover, and the packing is arranged in the packing groove. A packing sleeve is arranged on the top end of the packing, and a packing pressure plate is arranged on the top end of the packing sleeve. The packing pressure plate is fastened to the valve cover by bolts, and the valve stem passes through the packing groove, the packing, the packing sleeve and the packing pressure plate in sequence and is connected with a handwheel.

[0015] In a preferred embodiment of the present invention, a sealing surface in contact with the valve seat is provided at the bottom of the lower flap body.

[0016] In a preferred embodiment of the present invention, the bottom of the valve stem is configured as a spherical end surface.

[0017] In a preferred embodiment of the utility model, the valve stem includes a sliding section and an expanded diameter section connected in sequence, the sliding section can slide up and down and extend into the outlet flow channel, the expanded diameter section is arranged in the outlet flow channel, and its end is connected to the valve disc.

[0018] Beneficial effects: The utility model is a high-sealing stop valve, which seals the valve through a bellows and a packing. The bellows stop valve has good sealing performance, is not easy to leak during medium transportation, and has high safety. An upper valve body is provided to guide the medium, and the bellows is basically not affected by the erosion of the medium, which can extend the working life of the bellows, increase the service life of the valve, and further improve the sealing performance of the valve, which has high safety.

[0019] The utility model discloses a high-sealing stop valve, wherein a valve stem comprises a sliding section and an expanded diameter section which are connected in sequence, the sliding section slides through the valve cover along with a hand wheel, and the expanded diameter section cannot penetrate the valve cover, thereby providing an axial limit for the opening of the valve disc, the utility model has a simple structure, can control the moving distance of the valve stem and the opening and closing position of the valve, and has a mechanical structure with good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A cross-sectional view of a high-sealing stop valve provided by the utility model;

[0021] Figure 2 A partial cross-sectional view of a high-sealing stop valve provided by the utility model;

[0022] Figure 3 For the utility model Figure 1 A local enlarged view of point A;

[0023] Figure 4 For the utility model Figure 1 A partial enlarged view of point B.

[0024] In the figure: 1 valve body, 11 inlet flow channel, 12 outlet flow channel, 13 valve seat;

[0025] 2 valve cover;

[0026] 3 valve discs, 31 upper valve body, 32 lower valve body;

[0027] 4 valve stem, 41 sliding section, 42 expanding diameter section;

[0028] 5. Valve disc cover;

[0029] 6 bellows;

[0030] 7. Filling;

[0031] 8. Packing gland;

[0032] 9Packing plate. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] like Figure 1-2 As shown, the utility model provides a high sealing stop valve, comprising:

[0035] A valve body 1, in which an inlet flow channel 11, an outlet flow channel 12 and a valve seat 13 for separating the inlet flow channel 11 and the outlet flow channel 12 are arranged;

[0036] A valve cover 2 is arranged at the upper end of the valve body 1 to close the top opening of the outlet flow channel 12 and is sealed with the valve body 1;

[0037] The valve stem 4 has a lower portion that passes through the valve cover 2 and is connected to a valve disc 3 that matches the valve seat 13. A valve disc cover 5 is sleeved on the bottom end of the valve stem 4. The valve disc cover 5 is covered on the valve disc 3. The valve disc cover 5 is used to fix the valve disc 3 to prevent the valve disc 3 from falling off.

[0038] The bellows 6 is sleeved on the valve stem 4 between the valve cover 2 and the valve disc 3. The top of the bellows 6 is arranged between the valve body 1 and the valve cover 2. A gasket is arranged on the top and bottom to form a static seal to improve the sealing performance of the bellows 6. The bottom of the bellows 6 is provided with a guide ring, which is welded and fixed to the valve stem 4. The bellows 6 can move telescopically along the axial direction of the valve stem 4. The guide ring can increase the welding strength with the valve stem 4 and improve the service life of the bellows 6.

[0039] The valve flap 3 is arranged in the outlet flow channel 12 and installed below the bellows 6, and includes an upper flap body 31 and a lower flap body 32. A Z-shaped connecting surface is arranged between the upper flap body 31 and the lower flap body 32. A sealing ring is installed in the connecting surface and is fixed by screws. This connecting structure increases the connection strength between the upper flap body 31 and the lower flap body 32, and at the same time improves the sealing and convenience of the connection;

[0040] The upper valve body 31, such as Figure 4 As shown, sealing bodies are provided at both ends thereof, which abut against the inner wall of the outlet flow channel 12 and move along the inner wall of the outlet flow channel 12 with the valve stem 4. The inner wall of the outlet flow channel 12 in contact with the upper flap body 31 is vertical. The upper flap body 31 is used to guide the medium entering the outlet flow channel 12, block the medium from entering the upper cavity of the outlet flow channel 12, avoid the medium from directly scouring the bellows 6, causing it to lose its elasticity, and at the same time prevent the medium from damaging the bellows 6, thereby increasing the service life of the bellows 6.

[0041] On the basis of the above embodiment, a packing assembly is arranged on the top of the valve cover 2, and the packing assembly includes a packing 7, a packing gland 8 and a packing pressure plate 9. A packing groove is arranged on the top of the valve cover 2, and the packing 7 is arranged in the packing groove. A packing gland 8 is arranged at the top of the packing 7, and a packing pressure plate 9 is arranged at the top of the packing gland 8. The packing pressure plate 9 is fastened to the valve cover 2 by bolts. The valve stem 4 passes through the packing groove, the packing 7, the packing gland 8 and the packing pressure plate 9 in sequence and is connected to a hand wheel, and the hand wheel is used to control the up and down movement of the valve disc 3.

[0042] Fill the packing 7 into the packing groove, compact the packing 7 through the packing pressing plate 9 and the packing pressing sleeve 8, seal the connection between the valve stem 4 and the valve cover 2, and improve the sealing performance of the packing assembly.

[0043] On the basis of the above embodiment, a sealing surface in contact with the valve seat 13 is provided at the bottom of the lower flap body 32 to increase the sealing performance with the valve seat 13 .

[0044] On the basis of the above embodiment, the bottom of the valve stem 4 is set as a spherical end surface, which can be freely moved and fine-tuned in all directions with the valve disc 3 during installation so as to be aligned with the sealing surface of the valve seat 13 to ensure sealing.

[0045] Based on the above embodiments, Figure 3 As shown, the valve stem 4 includes a sliding section 41 and an enlarged diameter section 42 connected in sequence, the sliding section 41 can slide up and down and extend into the outlet flow channel 12, the enlarged diameter section 42 is arranged in the outlet flow channel 12, and its end is connected to the valve disc 3;

[0046] The sliding section 41 slides along with the hand wheel and penetrates into the valve cover 2 , and the enlarged diameter section 42 cannot penetrate the valve cover 2 , thereby providing an axial limit for the opening of the valve disc 3 .

[0047] It should be noted that:

[0048] The high-sealing stop valve of the utility model is used by manually turning the hand wheel to move the valve stem 4 upward, driving the valve disc 3 to move upward, the inlet flow channel 11 is connected with the outlet flow channel 12, the valve is opened, the bellows 6 and the packing 7 are used to seal the valve stem 4 to avoid leakage of the medium during the movement of the valve stem 4, and the upper disc body 31 is used to guide the medium entering the outlet flow channel 12 to avoid direct flushing of the bellows 6 by the medium; the valve is closed by the hand wheel and the valve disc 3, and the stop valve has a simple structure.

[0049] In summary:

[0050] The utility model discloses a high-sealing stop valve, which seals the valve through a bellows and a stuffing. The bellows stop valve has good sealing performance, is not easy to leak during medium transportation, has high safety, and an upper valve body is arranged to guide the medium. The bellows is basically not affected by the scouring of the medium, which can extend the working life of the bellows, increase the service life of the valve, and further improve the sealing performance of the valve.

[0051] The utility model discloses a high-sealing stop valve, wherein a valve stem comprises a sliding section and an expanded diameter section which are connected in sequence, the sliding section slides with a hand wheel and is penetrated in a valve cover, and the expanded diameter section cannot penetrate the valve cover, thereby providing an axial limit for the opening of a valve disc, the utility model has a simple structure, and can control the moving distance of the valve stem and the opening and closing position of the valve.

[0052] The above shows and describes the basic principle, main features and advantages of the utility model. The front, back, left and right used in the text are not specific, mainly for a more intuitive description of the technical solution, and do not have a limiting effect. The technical personnel in this industry should understand that the above implementation is only to illustrate the technical concept and characteristics of the utility model, and its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it, and it cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A high sealing stop valve, characterized in that: include A valve body (1), wherein an inlet flow channel (11), an outlet flow channel (12) and a valve seat (13) for separating the inlet flow channel (11) and the outlet flow channel (12) are provided in the valve body (1); A valve cover (2) is arranged at the upper end of the valve body (1) to close the top opening of the outlet flow channel (12) and is sealed to the valve body (1); A valve stem (4), the lower part of which passes through the valve cover (2) and is connected to a valve flap (3) matched with a valve seat (13); a valve flap cover (5) is sleeved on the bottom end of the valve stem (4), and the valve flap cover (5) is covered on the valve flap (3); A bellows (6) is sleeved on the valve stem (4) between the valve cover (2) and the valve disc (3); the top end of the bellows (6) is arranged between the valve body (1) and the valve cover (2); a gasket is arranged at the top and bottom to form a static seal; the bottom end of the bellows (6) is provided with a guide ring, and the guide ring is fixed to the valve stem (4) by welding; A valve flap (3) is arranged in the outlet flow channel (12) and installed below the bellows (6), comprising an upper flap body (31) and a lower flap body (32), a Z-shaped connecting surface is arranged between the upper flap body (31) and the lower flap body (32), a sealing ring is installed in the connecting surface and is locked and fixed by screws; The upper valve body (31) is provided with sealing bodies at both ends thereof, abuts against the inner wall of the outlet flow channel (12), and moves along the inner wall of the outlet flow channel (12) along with the valve stem (4).

2. A high sealing stop valve according to claim 1, characterized in that: The inner wall of the outlet flow channel (12) in contact with the upper valve body (31) is vertical.

3. A high sealing stop valve according to claim 1, characterized in that: A packing assembly is arranged on the top of the valve cover (2), and the packing assembly includes a packing (7), a packing sleeve (8) and a packing pressure plate (9). A packing groove is arranged on the top of the valve cover (2), and the packing (7) is arranged in the packing groove. A packing sleeve (8) is arranged at the top end of the packing (7), and a packing pressure plate (9) is arranged at the top end of the packing sleeve (8). The packing pressure plate (9) is fastened to the valve cover (2) by bolts, and the valve stem (4) passes through the packing groove, the packing (7), the packing sleeve (8) and the packing pressure plate (9) in sequence and is connected to a hand wheel.

4. A high sealing stop valve according to claim 1, characterized in that: The bottom of the lower flap body (32) is provided with a sealing surface in contact with the valve seat (13).

5. A high sealing stop valve according to claim 1, characterized in that: The bottom of the valve stem (4) is configured as a spherical end surface.

6. A high sealing stop valve according to claim 1, characterized in that: The valve stem (4) comprises a sliding section (41) and an expanded diameter section (42) which are connected in sequence. The sliding section (41) can slide up and down and extend into the outlet flow channel (12). The expanded diameter section (42) is arranged in the outlet flow channel (12) and its end is connected to the valve flap (3).