Stop valve

Abstract

The utility model discloses a stop valve which comprises a valve body and a valve rod, a sealing gap is arranged between the valve body and the valve rod, a valve cover of the sealing gap is installed on the valve body, and the stop valve is characterized by comprising an installation rod which is located in the sealing gap and arranged in the circumferential direction of the valve rod and a sealing component which is installed on the installation rod in a sleeved mode. The sealing component comprises a lower blocking piece, an upper blocking piece, a plurality of sealing fillers located between the lower blocking piece and the upper blocking piece and a dismounting and mounting structure, the lower blocking piece and the upper blocking piece both slide on the mounting rod and are located in the sealing gap, and the dismounting and mounting structure can drive the sealing fillers to enter and exit from the sealing gap together. The length of the mounting rod is the same as that of the sealing gap, a driving assembly for driving the dismounting and mounting structure to enter and exit the sealing gap is arranged, the stop valve can directly take out the aged sealing filler from the sealing gap, follow-up sealing filler replacement is facilitated, and the complexity of taking out the sealing filler is effectively avoided.

Description

Technical Field

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

[0002] The sealing packing in a gate valve plays a crucial role in the valve. As an important component of valve sealing, the sealing packing effectively fills the sealing gap between the valve stem and the valve body, preventing fluid leakage from the gap between the valve body and the valve stem, and ensuring the sealing effect of the medium.

[0003] Because existing sealing packings are prone to aging during long-term use, the aged sealing packings tend to become loose and stick together. Several sealing packings may stick together, making it difficult to remove them directly. The current method usually involves using pry bars that are suitable for inserting into the sealing gap to pry out the sealing packing bit by bit. This operation is particularly cumbersome, time-consuming, and laborious. In summary, a gate valve is proposed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a shut-off valve that can directly remove aged sealing packing from the sealing gap, facilitating subsequent replacement of the sealing packing and effectively avoiding the cumbersome process of removing the sealing packing.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a stop valve, comprising a valve body and a valve stem, with a sealing gap between the valve body and the valve stem, and a valve cover with the sealing gap installed on the valve body, characterized in that: it includes an installation rod located within the sealing gap and arranged circumferentially around the valve stem, a sealing member fitted on the installation rod, the sealing member including a lower stop, an upper stop, a plurality of sealing packings located between the lower stop and the upper stop, and a disassembly and assembly structure, the lower stop and the upper stop both sliding on the installation rod and located in the sealing gap, the disassembly and assembly structure being able to drive the plurality of sealing packings to move in and out of the sealing gap together, the length of the installation rod being the same as the length of the sealing gap, and a driving assembly for driving the sealing member to move in and out of the sealing gap is provided.

[0006] By adopting the above technical solution, the sealing component can be carried out from the sealing gap by the driving component, and the sealing packing that is carried out can be replaced later, effectively avoiding the cumbersome process of removing the sealing packing.

[0007] The assembly and disassembly structure is further configured as follows: each mounting rod has a sliding groove along its length, a sliding rod slidably disposed in the sliding groove, a lower limit block threadedly connected to one end of the sliding rod and located on the bottom side of the lower stop, a plurality of threaded grooves are arranged at intervals along the length of the sliding rod, and an upper limit block located on the top side of the upper stop and threadedly connected to the threaded groove, wherein the upper limit block is threadedly connected to the corresponding threaded groove.

[0008] By adopting the above technical solution, the lower limit block is located on the bottom side of the lower stop, which facilitates the pushing of the sealing component out of the sealing gap. The upper limit block is located on the top side of the upper stop, which facilitates the pushing of the sealing component into the sealing gap, thus realizing the entry and exit of the sealing component in the sealing gap. In scenarios where more sealing filler can be added to adapt to higher working conditions, the upper limit block is threadedly connected in the corresponding thread groove.

[0009] A further configuration is provided: a limiting disc is connected to one end of the mounting rod facing the sealing gap, and the limiting disc is fixedly connected to the valve body. When the sealing member abuts against the limiting disc, the limiting disc restricts the sealing member from entering the flow channel of the valve body.

[0010] By adopting the above technical solution, the setting of the limiting plate can achieve a certain position limit, preventing the sealing component from entering the valve body flow channel and detaching from the sealing gap, thus preventing fluid from leaking from the valve cover.

[0011] The upper limit block is further configured such that it has a threaded hole, and the threaded hole is threadedly connected to a clamping screw that is facing and pressing against the upper stop.

[0012] By adopting the above technical solution and setting the tightening screws, the clamping force between the sealing packings can be enhanced, which can prevent the loosening of the sealing packings and effectively prevent fluid leakage.

[0013] The drive assembly is further configured such that: one end of the slide bar away from the lower limit block extends out of the valve cover and is connected to a connector, and a telescopic cylinder mounted on the valve body drives the connector to reciprocate.

[0014] By adopting the above technical solution, the drive component can drive the sealing component in and out of the sealing gap, which greatly facilitates the sending and receiving of the sealing component in and out of the sealing gap. It also facilitates the replacement of the sealing packing after the sealing component is sent out of the sealing gap. The telescopic cylinder can greatly reduce the need for manpower, reduce labor costs, and achieve rapid response.

[0015] The design is further configured such that the cross-sectional shapes of the upper and lower stops are adapted to the cross-sectional shape of the sealing gap.

[0016] By adopting the above technical solution, and by setting the cross-sectional shapes of the upper and lower baffles to match the cross-sectional shape of the sealing gap, the sealing filler can be smoothly carried out of the sealing gap, effectively preventing the pulverized sealing filler from being left in the sealing gap, and facilitating the subsequent cleaning of the sealing gap. Attached Figure Description

[0017] Figure 1 is a three-dimensional structural diagram of this embodiment; Figure 2 is a partial explosion diagram of this embodiment;

[0018] Figure 3 is a lower half cross-sectional view of the shut-off valve in this embodiment; Figure 4 is an upper half cross-sectional view of the shut-off valve in this embodiment; Figure 5 is an enlarged schematic diagram of point A in this embodiment;

[0019] In the diagram: 1. Valve body; 11. Valve stem; 13. Sealing gap; 14. Valve cover; 21. Limiting plate; 22. Mounting rod; 31. Lower stop; 32. Sealing packing; 33. Upper stop; 221. Sliding groove; 23. Sliding rod; 3. Sealing component; 4. Disassembly and assembly structure; 5. Drive assembly; 41. Lower limit block; 42. Threaded groove; 43. Upper limit block; 44. Clamping screw; 45. Threaded hole;

[0020] 51. Connecting parts; 52. Telescopic cylinder. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Referring to Figures 1 to 5, a shut-off valve includes a valve body 1 and a valve stem 11, with a sealing gap 13 between the valve body 1 and the valve stem 11, and a valve cover 14 bolted to the valve body 1 with the sealing gap 13. The valve cover 14 is characterized by being located within the sealing gap 13 and circumferentially surrounding the valve stem 11.

[0023] The mounting rod 22 is provided, and the sealing component 3 is fitted onto the mounting rod 22. The sealing component 3 includes a lower stop 31, an upper stop 33, a number of sealing fillers 32 located between the lower stop 31 and the upper stop 33, and a disassembly and assembly structure 4. The lower stop 31 and the upper stop 33 slide on the mounting rod 22 and are located in the sealing gap 13. The disassembly and assembly structure 4 can drive the number of sealing fillers 32 to move in and out of the sealing gap 13 together. The length of the mounting rod 22 is the same as the length of the sealing gap 13. A drive assembly 5 is provided to drive the sealing component 3 to move in and out of the sealing gap 13.

[0024] The disassembly and assembly structure 4 includes a sliding groove 221 for each mounting rod 22 along its length, a sliding rod 23 slidably disposed in the sliding groove 221, a lower limit block 41 threadedly connected to one end of the sliding rod 23 and located on the bottom side of the lower stop 31, a plurality of threaded grooves 42 spaced apart along the length of the sliding rod 23, and an upper limit block 43 located on the top side of the upper stop 33 and threadedly connected to the threaded grooves 42, the upper limit block 43 being threadedly connected to the corresponding threaded groove 42.

[0025] The mounting rod 22 is fixedly connected to a limiting plate 21 at one end facing the sealing gap 13. The limiting plate 21 is fixedly connected to the valve body 1. When the sealing member 3 abuts against the limiting plate 21, the limiting plate 21 restricts the sealing member 3 from entering the flow channel of the valve body 1. The upper limit block 43 is provided with a threaded hole 45, and the threaded hole 45 is threadedly connected to a clamping screw 44 facing the upper stop 33.

[0026] The drive assembly 5 includes a slide bar 23 extending from the end away from the lower limit block 41 out of the valve cover 14 and fixedly connected to a connector 51, and a telescopic cylinder 52 fixedly installed on the outside of the valve body 1 to drive the connector 51 to reciprocate; the cross-sectional shapes of the upper stop 33 and the lower stop 31 are adapted to the cross-sectional shape of the sealing gap 13; and a handwheel is fixedly installed to control the opening and closing state of the valve stem 11.

[0027] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A shut-off valve, comprising a valve body (1) and a valve stem (11), wherein a sealing gap (13) exists between the valve body (1) and the valve stem (11), and a valve cover (14) with the sealing gap (13) is mounted on the valve body (1), characterized in that: The device includes an installation rod (22) located within the sealing gap (13) and circumferentially arranged around the valve stem (11), a sealing member (3) fitted onto the installation rod (22), the sealing member (3) including a lower stop (31), an upper stop (33), a plurality of sealing fillers (32) located between the lower stop (31) and the upper stop (33), and a disassembly structure (4). The lower stop (31) and the upper stop (33) both slide on the installation rod (22) and are located in the sealing gap (13). The disassembly structure (4) can drive the plurality of sealing fillers (32) to enter and exit the sealing gap (13) together. The length of the installation rod (22) is the same as the length of the sealing gap (13), and a drive assembly (5) is provided to drive the sealing member (3) to enter and exit the sealing gap (13).

2. The shut-off valve according to claim 1, characterized in that: The disassembly and assembly structure (4) includes a sliding groove (221) for each mounting rod (22) along its length, a sliding rod (23) slidably disposed in the sliding groove (221), a lower limit block (41) threadedly connected to one end of the sliding rod (23) and the lower limit block (41) being located on the bottom side of the lower stop (31), a plurality of threaded grooves (42) being arranged at intervals along the length of the sliding rod (23), and an upper limit block (43) threadedly connected to the threaded grooves (42) on the top side of the upper stop (33), the upper limit block (43) being threadedly connected to the corresponding threaded groove (42).

3. The shut-off valve according to claim 1, characterized in that: The mounting rod (22) is connected to a limiting plate (21) at one end facing the sealing gap (13). The limiting plate (21) is fixedly connected to the valve body (1). When the sealing member (3) abuts against the limiting plate (21), the limiting plate (21) restricts the sealing member (3) from entering the flow channel of the valve body (1).

4. The shut-off valve according to claim 2, characterized in that: The upper limit block (43) has a threaded hole (45), and the threaded hole (45) is threadedly connected to a clamping screw (44) that is facing and abutting against the upper stop (33).

5. The shut-off valve according to claim 1, characterized in that: The drive assembly (5) includes a slide bar (23) extending from one end away from the lower limit block (41) out of the valve cover (14) and connected to a connector (51), and a telescopic cylinder (52) mounted on the valve body (1) to drive the connector (51) to reciprocate.

6. The shut-off valve according to claim 1, characterized in that: The cross-sectional shapes of the upper stop (33) and the lower stop (31) are adapted to the cross-sectional shape of the sealing gap (13).

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