Valve sealing assembly

Abstract

The utility model provides a valve sealing assembly which comprises a buckle cover installed outside a valve body. The valve rod is rotationally connected with the buckle cover and penetrates through the buckle cover to be arranged in the valve body; the sealing piece is used for sealing the sealing face of the valve body and connected to the bottom end of the valve rod, two corresponding limiting blocks are arranged on the outer side face of the sealing piece, the sealing face of the valve body is provided with a guide channel for the limiting blocks to move, and the valve rod drives the sealing piece to move from the first position of the guide channel to the second position of the guide channel. And the sealing element seals the sealing surface of the valve body. The sealing piece is driven by the valve rod to rotate, so that the limiting block on the outer side of the sealing piece moves and is clamped in the guide channel in the sealing surface, the sealing piece can seal the sealing surface of the valve body, and the problems that in the prior art, threads on the outer surface of the valve rod are abraded due to long-time rotation, and the sealing surface is damaged are solved. And the sealing of the sealing assembly to the valve body is not stable due to the fact that the thread between the valve rod and the valve body is slipped.

Description

Technical Field

[0001] This application belongs to the field of water environment management technology, and in particular relates to a valve sealing assembly. Background Technology

[0002] A valve generally consists of components such as a valve body, valve core, valve stem, valve seat, and handwheel. The valve seat is fixed to the valve body, and the valve stem extends out of the valve body from the valve seat. Some valves have a cylinder installed on the valve seat for easy operation, and the valve stem extends into the cylinder to connect with the piston. To ensure the sealing between the valve stem, valve seat, and cylinder, existing technology typically installs a sealing ring between the valve stem and valve seat, and another sealing ring between the valve stem and cylinder base plate. If a stronger seal is required, multiple sealing rings are installed.

[0003] For example, Chinese patent CN220646786U discloses a valve sealing assembly, including a valve body, connecting flanges, and external pipes. The external pipes are fixedly connected to the other side of the two connecting flanges. Two fixing blocks are internally connected to the valve body, and partition plates are fixedly connected to the inner sides of the two fixing blocks. A connecting cavity is fixedly connected to the inner sides of the two partition plates. Rotating the handle allows the valve stem to rotate up and down, causing the valve stem to move a sealing block at its lower end to block the connecting cavity. When the sealing block moves downwards and blocks the connecting cavity, the water storage cavity fills with water from the pipe. The surface tension of the water in the storage cavity then assists in sealing the sealing block, preventing water from seeping into the sealing block at the lower end of the connecting cavity. This multi-layered sealing structure avoids the metal spring from breaking due to metal fatigue caused by corrosion, thus improving the sealing effect of the valve sealing assembly. In the aforementioned patent, the valve stem 6 is threadedly connected to the valve body 1. When sealing the valve body, the valve stem 6 needs to be rotated. However, prolonged rotation will cause wear on the threads on the surface of the valve stem 6, resulting in slippage between the valve stem 6 and the valve body 1, which affects the sealing effect and makes the sealing assembly unstable. Utility Model Content

[0004] In view of this, the main objective of this application is to provide a valve sealing assembly.

[0005] The technical solution adopted in this application is as follows: A valve sealing assembly, comprising:

[0006] The cover is installed on the outside of the valve body;

[0007] A valve stem is rotatably connected to the cover and passes through the cover into the valve body;

[0008] A sealing element is used to seal the sealing surface of the valve body and is connected to the bottom end of the valve stem. The outer side of the sealing element is provided with two corresponding limiting blocks. The sealing surface of the valve body is provided with a guide channel for the movement of the limiting blocks. After the valve stem drives the sealing element to move from the first position of the guide channel to the second position of the guide channel, the sealing element seals the sealing surface of the valve body.

[0009] Furthermore, the bottom of the valve stem is connected to a rod body perpendicular to the valve stem; the seal has a fan-shaped cavity for the rotation of the rod body; after the valve stem drives the rod body to move the seal from the first position of the guide channel to the second position of the guide channel, the seal seals the sealing surface of the valve body.

[0010] Furthermore, the guide channel includes a vertical guide groove and an arc-shaped guide groove, wherein the arc-shaped guide groove is connected to the lower end of the vertical guide groove and communicates with the vertical guide groove.

[0011] Furthermore, a sealing block located in the valve body is sleeved on the outer side of the valve stem, and the circumferential surface of the sealing block is connected to the inner wall of the valve body.

[0012] Furthermore, a sealing ring is provided on the connection end face between the sealing block and the valve body.

[0013] Compared with the prior art, the present application has the following advantages: by driving the valve stem to rotate the sealing element, the limiting block on the outer side of the sealing element moves and engages in the guide channel on the sealing surface, thus achieving the sealing of the valve body sealing surface by the sealing element. This optimizes the shortcomings of the prior art, where long-term rotation causes wear on the threads on the valve stem, resulting in slippage between the valve stem and the valve body, leading to unstable sealing of the valve body by the sealing component. Attached Figure Description

[0014] The following figures are for illustrative purposes only and are not intended to limit the scope of this application, wherein:

[0015] Figure 1 This is a cross-sectional structural diagram of this application;

[0016] Figure 2 This is a three-dimensional schematic diagram of the valve stem, seal, and valve body sealing surface in this application;

[0017] Figure 3 This is a schematic diagram of the connection between the seal and the rod in this application.

[0018] Figure descriptions: 10. Cover; 11. Valve stem; 12. Seal; 13. Sealing surface; 14. Limiting block; 15. Guide channel; 16. Rod body; 17. Cavity; 18. Vertical guide groove; 19. Arc-shaped guide groove; 20. Sealing block; 21. Sealing ring; 30. Valve body. Detailed Implementation

[0019] To make the objectives, technical solutions, design methods, and advantages of this application clearer, the following detailed description, in conjunction with the accompanying drawings, provides specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application.

[0020] 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, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0021] Reference Figures 1 to 3 This application provides a valve sealing assembly, including a cover 10, a valve stem 11, and a seal 12.

[0022] The cover 10 is installed on the outside of the valve body 30;

[0023] The valve stem 11 is rotatably connected to the cover 10 and passes through the cover 11 and is placed in the valve body 30;

[0024] The sealing element 12 is used to seal the sealing surface 13 of the valve body 30 and is connected to the bottom end of the valve stem 11. The outer side of the sealing element 12 is provided with two corresponding limiting blocks 14. The sealing surface 13 of the valve body 30 is provided with a guide channel 15 for the movement of the limiting blocks 14. After the valve stem 11 drives the sealing element 12 to move from the first position of the guide channel 15 to the second position of the guide channel 15, the sealing element 12 seals the sealing surface 13 of the valve body 30.

[0025] In the above, the valve stem 11 is not threaded. When it is necessary to seal the sealing surface 13 of the valve 30, the valve stem 11 is pushed down so that the sealing element 12 connected to the bottom end of the valve stem 11 is placed in the sealing surface 13 of the valve body 30. By rotating the valve stem 11, the sealing element 12 is engaged in the guide channel 15 of the sealing surface 13 by the limiting block 14. The sealing element 12 is connected to the sealing surface 13 to achieve the sealing assembly to seal the valve 30.

[0026] In the above, the width of the guide channel 15 is adapted to the width of the limiting block 14, so that the limiting block 14 and the guide channel 15 form a snap-fit ​​engagement, so that the limiting block 14 is fixed at the sealing surface 13 to achieve sealing.

[0027] As one embodiment of this application, reference is made to Figures 1-3 As shown, the bottom of the valve stem 11 is connected to a rod body 16 perpendicular to the valve stem 11; the sealing member 12 is provided with a fan-shaped cavity 17 for the rotation of the rod body 16; after the valve stem 11 drives the rod body 16 to move the sealing member 12 from the first position of the guide channel 15 to the second position of the guide channel 15, the sealing member 12 seals the sealing surface 13 of the valve body 30.

[0028] In the above, the diameter of the rod 16 is the same as the height of the cavity 17.

[0029] As one embodiment of this application, reference is made to Figure 2 As shown, the guide channel 15 includes a vertical guide groove 18 and an arc-shaped guide groove 19. The arc-shaped guide groove 19 is connected to the lower end of the vertical guide groove 18 and communicates with the vertical guide groove 18.

[0030] In the above description, the sealing element 12 moves down with the valve stem 11, and the limiting block 14 on the sealing element 12 moves down along the vertical guide groove 18 into the arc-shaped guide groove 19. This position is recorded as the first position. The valve stem 11 is rotated so that the rod body 16 rotates around the valve stem 11 in the fan-shaped cavity 17. When the rod body 16 comes into contact with the inner wall of the cavity 17, the sealing element 12 will rotate along the arc-shaped guide groove 19 under the action of the rod body 16 to the end of the arc-shaped guide groove 19 away from the vertical guide groove 18. This position is recorded as the second position. When the limiting block 14 of the sealing element 12 moves to this position, the sealing surface 13 is sealed. When it is necessary to close the seal, the valve stem 11 is rotated in the opposite direction so that the limiting block 14 of the sealing element 12 moves from the second position to the first position. The valve stem 11 is then lifted to complete the sealing closure step.

[0031] In the above, the vertical guide groove 18 and the arc-shaped guide groove 19 are respectively connected to the sealing surface of the seal 12 for sealing.

[0032] As one embodiment of this application, reference is made to Figure 1 As shown, a sealing block 20 located in the valve body 30 is sleeved on the outer side of the valve stem 11, and the circumferential surface of the sealing block 20 is connected to the inner wall of the valve body 30.

[0033] As one embodiment of this application, reference is made to Figure 1 As shown, a sealing ring 21 is provided on the connection end face of the sealing block 20 and the valve body 30.

[0034] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technological improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A valve sealing assembly, characterized in that, include: The cover (10) is installed on the outside of the valve body (30); The valve stem (11) is rotatably connected to the cover (10) and passes through the cover (10) and is placed in the valve body (30); A sealing element (12) is used to seal the sealing surface (13) of the valve body (30) and is connected to the bottom end of the valve stem (11). The outer side of the sealing element (12) is provided with two corresponding limiting blocks (14). The sealing surface (13) of the valve body (30) is provided with a guide channel (15) for the movement of the limiting blocks (14). After the valve stem (11) drives the sealing element (12) to move from the first position of the guide channel (15) to the second position of the guide channel (15), the sealing element (12) seals the sealing surface (13) of the valve body (30).

2. The valve sealing assembly according to claim 1, characterized in that, The bottom of the valve stem (11) is connected to a rod body (16) perpendicular to the valve stem (11); the sealing member (12) is provided with a fan-shaped cavity (17) for the rotation of the rod body (16); after the valve stem (11) drives the rod body (16) to move the sealing member (12) from the first position of the guide channel (15) to the second position of the guide channel (15), the sealing member (12) seals the sealing surface (13) of the valve body (30).

3. A valve sealing assembly according to claim 1 or 2, characterized in that, The guide channel (15) includes a vertical guide groove (18) and an arc-shaped guide groove (19). The arc-shaped guide groove (19) is connected to the lower end of the vertical guide groove (18) and communicates with the vertical guide groove (18).

4. A valve sealing assembly according to claim 1, characterized in that, A sealing block (20) located in the valve body (30) is sleeved on the outside of the valve stem (11), and the circumferential surface of the sealing block (20) is connected to the inner wall of the valve body (30).

5. A valve sealing assembly according to claim 4, characterized in that, A sealing ring (21) is provided on the connection end face between the sealing block (20) and the valve body (30).

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