A packing gland for a valve body

Abstract

This utility model relates to the field of packing gland technology and discloses a packing gland for a valve body. It comprises two symmetrical first and second covers, with matching first and second bushings on their sides. It also includes two connectors for connecting the first and second covers, as well as the first and second bushings. Each of the opposite sides of the first and second covers and bushings has an insertion limiting groove adapted to the connector. Each of the opposite sides of the first and second covers and bushings also has a limiting ring for limiting the connector, with fastening bolts on the limiting rings for connection and fixation. In this utility model, the connector is inserted into two adjacent insertion limiting grooves and limited by the limiting rings. When replacing the packing gland, it is not necessary to disassemble the connecting parts on the valve body shaft, facilitating the replacement of the packing gland on the valve body later.

Description

Technical Field

[0001] This utility model relates to the field of packing gland technology, specifically a packing gland for valve bodies. Background Technology

[0002] In the field of fluid control, the valve body is a key component for controlling the flow and flow of fluid. Its sealing performance directly affects the operational stability and safety of the entire fluid system. The packing gland is an important part of the valve body sealing structure.

[0003] A search revealed a patent, CN205173690U, which discloses a packing gland for a valve body. The gland has slots at both ends, with mounting holes within each slot. The slots have a heart-shaped cross-section, including a first arc surface, a second arc surface, and rounded corners on both sides of the second arc surface. The center of the second arc surface is concentric with the center of the gland hole, and the difference between the radius of the second arc surface and the radius of the bushing is greater than 5mm. The first and second arc surfaces face each other. The mounting holes are located within the slots of the gland body. The cavity within the slots serves as a mounting cavity for bolts or screws, separate from the bushing and unaffected. The arc design of each surface of the slot reduces stress concentration between the two contact surfaces. The radius of the second arc surface is larger than the radius of the bushing, ensuring that the mounting holes, even after prolonged wear from bolts or screws, will not affect the bushing. The bushing can be reused simply by repairing the mounting holes, thus improving the overall service life and stability of the packing gland.

[0004] The aforementioned patents have significant beneficial effects, but in practical application, they still have the following shortcomings:

[0005] In reality, the packing gland on the valve body plays a crucial role in sealing. When the sealing effect of the packing gland decreases, it needs to be replaced. However, since the packing gland is fitted onto the side of the valve body shaft and there is a connecting piece between the valve body and the shaft, the connecting piece needs to be disassembled before the packing gland can be removed and replaced. This is inconvenient for replacing the packing gland on the valve body. Therefore, there is an urgent need in the field to improve the packing gland to overcome the shortcomings of the existing technology. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a packing gland for valve bodies, which facilitates the replacement of packing glands on valve bodies in the future.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a packing gland for a valve body, comprising two symmetrical first covers and second covers, with a matching first bushing and second bushing respectively fixedly installed on the sides of the first covers and the second covers;

[0008] It also includes two connectors for connecting the first cover and the second cover, as well as the first bushing and the second bushing. The first cover, the first bushing, the second cover, and the second bushing are all provided with insertion limiting grooves adapted to the connectors on their opposite sides. The first cover, the first bushing, the second cover, and the second bushing are all provided with limiting rings for limiting the connectors on their opposite sides. The limiting rings are provided with fastening bolts for connection and fixation.

[0009] Preferably, a snap-fit ​​groove is provided on one side of the first cover and the second cover, and the snap-fit ​​groove is adapted to the limiting ring.

[0010] Preferably, a number of first positioning posts are fixedly installed on one side of the limiting ring, and a number of first positioning grooves adapted to the first positioning posts are opened on the inner sidewalls of the first bushing, the second bushing, and the snap-fit ​​groove.

[0011] Preferably, a plurality of second positioning posts are fixedly connected to one side of the limiting ring, and the two ends of the connector are provided with second positioning grooves that are adapted to the second positioning posts.

[0012] Preferably, the limiting ring has several first countersunk holes, which are adapted to fastening bolts.

[0013] Preferably, both the first cover and the second cover are provided with a second countersunk hole, which is located on the opposite side of the first cover and the second cover.

[0014] Preferably, reinforcing ribs are fixedly installed between the first cover and the first bushing, and between the second cover and the second bushing.

[0015] Preferably, the first positioning post is frustum-shaped and the end of it closer to the limiting ring is larger than the end of it farther from the limiting ring.

[0016] Preferably, the second positioning post is frustum-shaped and the end of it closer to the limiting stop ring is larger than the end of it farther from the limiting stop ring.

[0017] To address the shortcomings of existing technologies, this utility model provides a packing gland for valve bodies, overcoming these deficiencies. The beneficial effects of this utility model are as follows:

[0018] 1. In this utility model, the connector is inserted into two adjacent insertion limiting grooves, and the connector is limited by the limiting retaining ring. This allows the connecting parts on the valve body shaft to be replaced without disassembling them, which facilitates the replacement of the packing gland on the valve body later.

[0019] 2. In this utility model, by setting a plurality of first positioning posts and second positioning posts, the stability between the first cover and the second cover, as well as the first bushing and the second bushing, is improved.

[0020] 3. In this utility model, by setting the first positioning post to be frustum-shaped with the end near the limiting ring being larger than the end away from the limiting ring, and the second positioning post to be frustum-shaped with the end near the limiting ring being larger than the end away from the limiting ring, the gap between the two connecting parts, the first cover and the second cover, and the first bushing and the second bushing can be reduced, thereby improving the stability and sealing between the first cover and the second cover, and the first bushing and the second bushing.

[0021] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0022] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the first cover and the first bushing in this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the connector inserted into the insertion limiting groove in this utility model;

[0026] Figure 4 This is a schematic diagram of the connecting component in this utility model;

[0027] Figure 5 This is a cross-sectional structural diagram of the limiting retaining ring in this utility model;

[0028] Figure 6 for Figure 3 Enlarged structural diagram at point A in the middle.

[0029] In the figure: 1. First cover; 2. First bushing; 3. Second cover; 4. Second bushing; 5. Connector; 6. Insertion limiting groove; 7. Limiting retaining ring; 8. Fastening bolt; 9. Snap-fit ​​groove; 10. First positioning post; 11. First positioning groove; 12. Second positioning post; 13. Second positioning groove; 14. First countersunk hole; 15. Second countersunk hole; 16. Reinforcing rib. Detailed Implementation

[0030] 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.

[0031] Example 1

[0032] Please see Figures 1-6 A packing gland for a valve body comprises two symmetrical first cover bodies 1 and second cover bodies 3, with matching first bushings 2 and second bushings 4 fixedly mounted on their sides respectively; it also includes two connectors 5 for connecting the first cover bodies 1 and second cover bodies 3 and the first bushings 2 and second bushings 4, with insertion limiting grooves 6 adapted to the connectors 5 on opposite sides of the first cover bodies 1 and first bushings 2 and the second cover bodies 3 and second bushings 4. Both sides of the two bushings 4 are provided with limiting rings 7 for limiting the connecting parts 5. The limiting rings 7 are provided with fastening bolts 8 for connection and fixation. The first cover 1 and the second cover 3 are provided with snap-fit ​​grooves 9 on one side. The snap-fit ​​grooves 9 are adapted to the limiting rings 7. The limiting rings 7 are provided with several first countersunk holes 14. The first countersunk holes 14 are adapted to the fastening bolts 8. The first cover 1 and the second cover 3 are provided with second countersunk holes 15. The second countersunk holes 15 are located on the opposite end sides of the first cover 1 and the second cover 3.

[0033] In this embodiment, the specific implementation is as follows: When installing the packing gland on the valve body, firstly, two limiting rings 7 are fitted onto the side of the valve body shaft. The first cover 1 and the second cover 3, as well as the first bushing 2 and the second bushing 4, are snapped onto the side of the valve body shaft, positioned between the two limiting rings 7, and their adjacent insertion limiting grooves 6 are aligned. The connector 5 is then inserted into the two adjacent insertion limiting grooves 6, with the sides of the connector 5 wider than its central position, thus connecting the two first covers 1 and the second cover 3, as well as the first bushing 2 and the second bushing 4. One limiting ring 7 is snapped into the snap-fit ​​groove 9, and another limiting ring 7 is tightly attached to the side of the first bushing 2 and the second bushing 4. Several fastening bolts 8 are then inserted through the first... A countersunk hole 14 is threaded into the inner wall of the first bushing 2, the second bushing 4, or the snap-fit ​​groove 9 to connect and fix the first cover 1, the second cover 3, the first bushing 2, and the second bushing 4. When the packing gland needs to be replaced later, the fastening bolt 8 is removed, and the connector 5 located in the insertion limiting groove 6 is taken out. The first cover 1, the first bushing 2, the second cover 3, and the second bushing 4 can then be disassembled on the side of the valve body shaft. The new first cover 1, the first bushing 2, the second cover 3, and the second bushing 4 are snapped onto the side of the valve body shaft. This allows the packing gland to be replaced without disassembling the connecting parts on the valve body shaft, making it easier to replace the packing gland on the valve body later.

[0034] Example 2

[0035] Please see Figures 2-6 This embodiment includes the above embodiment, and further includes: a plurality of first positioning posts 10 are fixedly installed on one side of the limiting ring 7; a plurality of first positioning grooves 11 adapted to the first positioning posts 10 are opened on the inner sidewalls of the first bushing 2, the second bushing 4 and the snap-fit ​​groove 9; the first positioning post 10 is frustum-shaped and its end near the limiting ring 7 is larger than its end away from the limiting ring 7; a plurality of second positioning posts 12 are fixedly connected to one side of the limiting ring 7; a second positioning groove 13 adapted to the second positioning post 12 is opened on both ends of the connector 5; the second positioning post 12 is frustum-shaped and its end near the limiting ring 7 is larger than its end away from the limiting ring 7; and reinforcing ribs 16 are fixedly installed between the first cover 1 and the first bushing 2 and between the second cover 3 and the second bushing 4.

[0036] In this embodiment, the first positioning post 10 and the second positioning post 12 on one side of the limiting ring 7 are respectively engaged in the corresponding first positioning groove 11 and the second positioning groove 13. The first positioning post 10 and the second positioning post 12 are both frustum-shaped and are locked with fastening bolts 8. This reduces the gap between the two connecting parts 5, the first cover 1 and the second cover 3, and the first bushing 2 and the second bushing 4, improving the stability and sealing between the first cover 1 and the second cover 3, and the first bushing 2 and the second bushing 4. The reinforcing ribs 16 enhance the connection strength between the first cover 1 and the first bushing 2, and the second cover 3 and the second bushing 4. In practice, sealing components such as sealing rings can be embedded in the positions of the first cover 1, the first bushing 2, the second cover 3, or the second bushing 4, depending on the actual situation.

[0037] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] The above description is merely 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 packing gland for a valve body, characterized by, Two symmetrical first cover body (1) and second cover body (3), first cover body (1) and second cover body (3) side fixed mounting with the first shaft sleeve (2) and second shaft sleeve (4) are adapted respectively; It also includes two connecting pieces (5) for connecting the first cover body (1) and the second cover body (3) and the first shaft sleeve (2) and the second shaft sleeve (4), the first cover body (1) and the first shaft sleeve (2) and the second cover body (3) and the second shaft sleeve (4) opposite side are provided with the plug-in limiting slot (6) matched with the connecting piece (5), the first cover body (1) and the first shaft sleeve (2) and the second cover body (3) and the second shaft sleeve (4) opposite side are provided with limiting stop ring (7) for limiting the connecting piece (5), the limiting stop ring (7) is provided with fastening bolt (8) for connecting and fixing.

2. A packing gland for a valve body according to claim 1, wherein, The first cover body (1) and the second cover body (3) are provided with clamping groove (9) on one side, and the clamping groove (9) is matched with the limiting stop ring (7).

3. A packing gland for a valve body according to claim 1, wherein, The limiting stop ring (7) is fixedly installed with a plurality of first positioning columns (10), and the first shaft sleeve (2), the second shaft sleeve (4) and the inner wall of the clamping groove (9) are provided with a plurality of first positioning grooves (11) matched with the first positioning columns (10).

4. A packing gland for a valve body according to claim 1, wherein, The limiting stop ring (7) is fixedly connected with a plurality of second positioning columns (12), and the connecting piece (5) is provided with a second positioning groove (13) matched with the second positioning column (12) at both ends.

5. A packing gland for a valve body according to claim 1, wherein, The limiting stop ring (7) is provided with a plurality of first countersunk holes (14), and the first countersunk holes (14) are matched with the fastening bolt (8).

6. A packing gland for a valve body according to claim 1, wherein, The first cover body (1) and the second cover body (3) are provided with second countersunk holes (15), and the second countersunk holes (15) are located on the opposite end sides of the first cover body (1) and the second cover body (3).

7. A packing gland for a valve body according to claim 1, wherein, The first cover body (1) and the first shaft sleeve (2) and the second cover body (3) and the second shaft sleeve (4) are fixedly installed with reinforcing ribs (16).

8. A packing gland for a valve body according to claim 3, wherein, The first positioning column (10) is circular truncated cone, and the end close to the limiting stop ring (7) is larger than the end away from the limiting stop ring (7).

9. A packing gland for a valve body according to claim 4, wherein, The second positioning column (12) is circular truncated cone, and the end close to the limiting stop ring (7) is larger than the end away from the limiting stop ring (7).

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