Closed filler bin

Abstract

The utility model discloses a closed packing bin which comprises a bin body and a cover cap, the cover cap is arranged at the top of the bin body, a first placing hole is formed in the top of the bin body, an upper oil seal is arranged at the bottom of the first placing hole, the middle of the cover cap is tightly pressed on the top of the upper oil seal to fix the upper oil seal, and a sliding hole is formed in the middle of the bottom of the first placing hole. The oil immersion packing is arranged in the containing hole and can be matched with a valve rod, on one hand, water is prevented from permeating into the bin body, on the other hand, lubricating oil can fully lubricate the valve rod, abrasion of the valve rod is reduced, and the service life of the valve rod is prolonged; lubricating oil is sealed in the sliding hole and the containing hole through the upper oil seal and the lower oil seal, the valve rod can be fully lubricated when sliding in the sliding hole and the containing hole, and the packing bin is wide in application range, suitable for parallel up-down lifting type valve rods, good in sealing performance and free of maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of valve sealing, and particularly relates to a closed stuffing box. Background Technique

[0002] The valve part of a control valve consists of the internal parts of the valve and the valve body. The internal parts of the valve include a valve core, a valve stem, a stuffing box, an upper valve cover, etc. Among them, the stuffing assembly is used for sealing the valve stem, and it uses an elastic method to prevent process media from leaking on the surface of the valve stem through reciprocating or rotating motion. It is an inalienable part of the valve body.

[0003] Existing stuffing boxes usually need to design corresponding components according to specific valve stems to cooperate with the valve stems, with a narrow scope of application. Moreover, the valve stem is prone to wear during sliding, thereby affecting the service life of the valve stem.

[0004] Therefore, it is necessary to provide a closed stuffing box to solve the above technical problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a closed stuffing box to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A closed stuffing box, including a box body and a cap. The cap is arranged on the top of the box body. A first placement hole is opened at the top of the box body. An upper oil seal is arranged at the bottom of the first placement hole. The middle part of the cap presses on the top of the upper oil seal to fix it. A sliding hole is opened in the middle at the bottom of the first placement hole. A receiving hole is opened at one end of the sliding hole away from the first placement hole. A plurality of oil-impregnated packing rings are arranged in the receiving hole. A through hole for the valve stem to pass through is opened in the middle of the plurality of oil-impregnated packing rings. A second placement hole is opened at the bottom of the receiving hole. A plug is arranged in the second placement hole. The top of the plug abuts against the bottom of the oil-impregnated packing ring. A second gasket is sleeved on the outer circumferential surface of the upper end of the plug. The second gasket is located between the plug and the top of the second placement hole. A lower oil seal is also arranged in the second placement hole. The upper end of the lower oil seal presses on the bottom of the plug. A sealing cover is arranged at the bottom of the box body. The top of the sealing cover presses on the bottom of the lower oil seal. Through holes for the valve stem to pass through are opened in the middle of the sealing cover, the lower oil seal, the plug, the upper oil seal and the cap. A connection hole is opened on the circumferential surface in the middle of the box body. An oil inlet hole is opened in the middle at the bottom of the connection hole. The oil inlet hole is communicated with the sliding hole. A grease nipple is threadedly connected in the connection hole. An oil injection hole is opened in the middle of the grease nipple.

[0007] As a preferred technical solution of the present utility model, an external thread portion is provided on the outer circumferential surface at the upper end of the bin body, a second cut groove is provided on the surface of the cap, an internal thread portion is provided on the inner wall of the second cut groove, and the cap is threadedly connected to the top of the bin body through the cooperation of the internal thread portion and the external thread portion.

[0008] As a preferred technical solution of the present utility model, a first cut groove is provided on the upper surface of the bin body, and a sealing ring is arranged in the first cut groove.

[0009] As a preferred technical solution of the present utility model, a first gasket is arranged at the bottom of the second cut groove of the cap. The first gasket is located between the bottom of the second cut groove and the top of the bin body, and the first gasket is sleeved on the middle part of the cap.

[0010] As a preferred technical solution of the present utility model, the cross-sectional shape of the plug is an inverted "T" shape.

[0011] As a preferred technical solution of the present utility model, a plurality of threaded holes are provided at the bottom of the bin body, a plurality of counterbore holes are provided on the lower surface of the cover, and the plurality of counterbore holes correspond to the plurality of threaded holes one by one.

[0012] As a preferred technical solution of the present utility model, the connection hole is a threaded connection hole.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] For the closed packing bin of the present utility model, by arranging an oil-impregnated packing in the accommodation hole, it can cooperate with the valve stem. On the one hand, it can prevent water from penetrating into the bin body, and on the other hand, it can enable the lubricating oil to fully lubricate the valve stem, reduce the wear of the valve stem, and extend the service life of the valve stem. By respectively arranging an upper oil seal and a lower oil seal in the first placement hole and the second placement hole, the lubricating oil is enclosed in the sliding hole and the accommodation hole, and the valve stem can be fully lubricated when sliding in the sliding hole and the accommodation hole. By arranging an oil injection nozzle in the connection hole, the lubricating oil is injected into the bin body through the oil injection nozzle, which is convenient for lubricating the valve stem. This packing bin has a wide application range, is applicable to valve stems that move up and down in parallel, has good sealing performance, and is maintenance-free. Description of the Drawings

[0015] The following further illustrates the present utility model in conjunction with the drawings and embodiments.

[0016] Figure 1 is the overall structural sectional view of the present utility model;

[0017] Figure 2 is the three-dimensional schematic diagram of the overall structure of the present utility model;

[0018] Figure 3It is a cross-sectional view of the bin structure of the present utility model;

[0019] Figure 4 It is a three-dimensional schematic diagram of the bin structure of the present utility model;

[0020] Figure 5 It is a three-dimensional schematic diagram of the cap structure of the present utility model.

[0021] In the figure: 1. Bin; 101. First placement hole; 102. Slide hole; 103. Accommodating hole; 104. Second placement hole; 105. Connecting hole; 106. Oil inlet hole; 107. First cutting groove; 108. Threaded hole; 109. External thread part; 2. Cap; 21. Second cutting groove; 22. Internal thread part; 3. Sealing cover; 31. Countersunk hole; 4. Oil injection nozzle; 5. First gasket; 6. Sealing ring; 7. Upper oil seal; 8. Oil-impregnated packing; 9. Second gasket; 10. Plug; 11. Lower oil seal. Detailed implementation mode

[0022] The embodiments of the present utility model will be described below with reference to the accompanying drawings. During this process, to ensure the clarity and convenience of the description, we may exaggerate the widths of the lines or the sizes of the components in the drawings.

[0023] In addition, the terms used below are defined based on the functions in the present utility model and may vary according to the intentions or conventions of users and operators. Therefore, these terms are defined based on the entire content of this specification.

[0024] Such as Figures 1 to 5As shown in the figure, a closed stuffing box includes a box body 1 and a cap 2. A first placement hole 101 is opened at the top of the box body 1. An external thread portion 109 is provided on the outer circumferential surface of the upper end of the box body 1. A second cut groove 21 is provided on the surface of the cap 2. An internal thread portion 22 is provided on the inner wall of the second cut groove 21. The cap 2 is threadedly connected to the top of the box body 1 through the cooperation of the internal thread portion 22 and the external thread portion 109. An upper oil seal 7 is provided at the bottom of the first placement hole 101. The middle part of the cap 2 presses against the top of the upper oil seal 7 to fix it. A first cut groove 107 is opened on the upper surface of the box body 1. A sealing ring 6 is provided in the first cut groove 107, which plays a certain sealing role to prevent water from seeping into the box body 1. A first gasket 5 is provided at the bottom of the second cut groove 21 of the cap 2. The first gasket 5 is located between the bottom of the second cut groove 21 and the top of the box body 1, and the first gasket 5 is sleeved on the middle part of the cap 2. A sliding hole 102 is opened in the middle of the bottom of the first placement hole 101 to facilitate the valve stem to pass through. A receiving hole 103 is opened at one end of the sliding hole 102 away from the first placement hole 101. A plurality of oil-impregnated packing 8 are provided in the receiving hole 103. A through hole for the valve stem to pass through is opened in the middle of the plurality of oil-impregnated packing 8. The oil-impregnated packing 8 cooperates with the valve stem for sealing. On the one hand, it prevents water from penetrating into the box body 1, and on the other hand, it can make the lubricating oil fully lubricate the valve stem and reduce the wear of the valve stem. A second placement hole 104 is opened at the bottom of the receiving hole 103. A plug 10 is provided in the second placement hole 104. The cross-sectional shape of the plug 10 is an inverted "T" shape. The top of the plug 10 abuts against the bottom of the oil-impregnated packing 8. A second gasket 9 is sleeved on the outer circumferential surface of the upper end of the plug 10. The second gasket 9 is located between the plug 10 and the top of the second placement hole 104. A lower oil seal 11 is also provided in the second placement hole 104. The upper end of the lower oil seal 11 presses against the bottom of the plug 10. A plurality of threaded holes 108 are opened at the bottom of the box body 1. A cover 3 is provided at the bottom of the box body 1. A plurality of counterbore holes 31 are opened on the lower surface of the cover 3. The plurality of counterbore holes 31 correspond to the plurality of threaded holes 108 one by one and are locked together by screws. The top of the cover 3 presses against the bottom of the lower oil seal 11. Through holes for the valve stem to pass through are opened in the cover 3, the lower oil seal 11, the plug 10, the upper oil seal 7 and the middle part of the cap 2.

[0025] A connection hole 105 is opened on the circumferential surface of the middle part of the box body 1. The connection hole 105 is a threaded connection hole. An oil inlet hole 106 is opened in the middle of the bottom of the connection hole 105. The oil inlet hole 106 is communicated with the sliding hole 102. A grease nipple 4 is threadedly connected in the connection hole 105. An oil injection hole is opened in the middle of the grease nipple 4, which is convenient for injecting lubricating oil to lubricate the valve stem, reduce the wear of the valve stem and extend the service life of the valve stem.

[0026] Specifically, the implementation manner is as follows. By arranging the oil-soaked packing 8 in the accommodation hole 103, it can cooperate with the valve stem. On the one hand, it can prevent water from penetrating into the bin body 1. On the other hand, it can enable the lubricating oil to fully lubricate the valve stem, reduce the wear of the valve stem, and extend the service life of the valve stem. By arranging the upper oil seal 7 and the lower oil seal 11 in the first placement hole 101 and the second placement hole 104 respectively, the lubricating oil is enclosed in the sliding hole 102 and the accommodation hole 103, and the valve stem can be fully lubricated when sliding in the sliding hole 102 and the accommodation hole 103. By arranging the oil injection nozzle 4 in the connection hole 105, the lubricating oil is injected into the bin body 1 through the oil injection nozzle 4, which is convenient for lubricating the valve stem.

[0027] In addition, it should be understood that although this specification is described according to the implementation manners, not each implementation manner only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation manners that can be understood by those skilled in the art.

Claims

1. A closed stuffing bin, characterized in that, It includes a bin body (1) and a cap (2). The cap (2) is arranged on the top of the bin body (1). A first placement hole (101) is opened at the top of the bin body (1). An upper oil seal (7) is arranged at the bottom of the first placement hole (101). The middle part of the cap (2) presses on the top of the upper oil seal (7) to fix it. A sliding hole (102) is opened in the middle at the bottom of the first placement hole (101). One end of the sliding hole (102) far from the first placement hole (101) is provided with a receiving hole (103). A plurality of oil-impregnated packing (8) are arranged in the receiving hole (103). A through hole for the valve rod to pass through is opened in the middle of the plurality of oil-impregnated packing (8). A second placement hole (104) is opened at the bottom of the receiving hole (103). A plug (10) is arranged in the second placement hole (104). The top of the plug (10) abuts against the bottom of the oil-impregnated packing (8). A second gasket (9) is sleeved on the outer circumferential surface of the upper end of the plug (10). The second gasket (9) is located between the plug (10) and the top of the second placement hole (104). A lower oil seal (11) is also arranged in the second placement hole (104). The upper end of the lower oil seal (11) presses on the bottom of the plug (10). A cover (3) is arranged at the bottom of the bin body (1). The top of the cover (3) presses on the bottom of the lower oil seal (11). Through holes for the valve rod to pass through are opened in the middle of the cover (3), the lower oil seal (11), the plug (10), the upper oil seal (7) and the cap (2). A connection hole (105) is opened on the circumferential surface in the middle of the bin body (1). An oil inlet hole (106) is opened in the middle at the bottom of the connection hole (105). The oil inlet hole (106) is communicated with the sliding hole (102). A grease nipple (4) is threadedly connected in the connection hole (105). An oil injection hole is opened in the middle of the grease nipple (4).

2. The enclosed packing bin according to claim 1, characterized in that: An external thread portion (109) is opened on the outer circumferential surface at the upper end of the bin body (1). A second cut groove (21) is opened on the surface of the cap (2). An internal thread portion (22) is opened on the inner wall of the second cut groove (21). The cap (2) is threadedly connected to the top of the bin body (1) through the cooperation of the internal thread portion (22) and the external thread portion (109).

3. The enclosed packing bin according to claim 1, characterized in that: A first cut groove (107) is opened on the upper surface of the bin body (1). A sealing ring (6) is arranged in the first cut groove (107).

4. A closed packing bin according to claim 1, characterized in that: A first gasket (5) is arranged at the bottom of the second cut groove (21) of the cap (2). The first gasket (5) is located between the bottom of the second cut groove (21) and the top of the bin body (1), and the first gasket (5) is sleeved on the middle part of the cap (2).

5. The closed stuffing box according to claim 1, characterized in that: The cross-sectional shape of the plug (10) is an inverted "T" shape.

6. The enclosed packing bin according to claim 1, wherein: A plurality of threaded holes (108) are opened at the bottom of the bin body (1). A plurality of counterbore holes (31) are opened on the lower surface of the cover (3). The plurality of counterbore holes (31) correspond to the plurality of threaded holes (108) one by one.

7. The enclosed packing bin according to claim 1, characterized in that: The connection hole (105) is a threaded connection hole.

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