CN214789379U

CN214789379U - Sealing stuffing box with multiple sealing structures

Info

Publication number: CN214789379U
Application number: CN202120774935.0U
Authority: CN
Inventors: 李军明
Original assignee: Zhenjiang Boshen New Materials Co ltd
Current assignee: Zhenjiang Boshen New Materials Co ltd
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2021-11-19
Anticipated expiration: 2031-04-15

Abstract

The utility model provides a sealed stuffing box of multiple seal structure, includes the stuffing box body, goes up gland, briquetting, packing assembly, valve rod and seal gasket, it locates the stuffing box body top to go up the gland, it installs the bolt to go up the gland, the mounting hole has been seted up at stuffing box body top, bolt threaded connection is in the mounting hole, the briquetting is connected in the upper gland lower surface, the valve rod passes gland, briquetting and stuffing box body in proper order, the inside stuffing chamber that is equipped with of stuffing box body, packing assembly locates inside the stuffing chamber, packing assembly includes packing one, packing two, packing ring one and packing ring two, packing one is located the briquetting below, a packing lower terminal surface is connected in two up end of packing, two lower terminal surfaces of packing are connected in the upper end surface of seal gasket, seal gasket is connected in packing chamber bottom.

Description

Sealing stuffing box with multiple sealing structures

Technical Field

The utility model relates to the technical field of valves, in particular to multiple seal structure's gland packing box.

Background

A valve is a device for controlling the direction, pressure, and flow rate of a fluid in a fluid system, and is a device capable of controlling the flow rate by flowing or stopping a medium in a pipe or an apparatus. The valve comprises a valve body, a valve core and a valve rod, and in order to ensure the sealing of the valve rod of the moving part in a working state, a packing seal is required to be arranged between the upper part of the valve body and the valve rod. The packing sealing type traditional contact type seal is mainly characterized by simple structure, convenient replacement, low cost and wide application range. The seal between the valve body and the valve rod is usually sealed by adopting a bolt screwing type stuffing box, namely, after the stuffing is filled into a stuffing cavity, the stuffing is axially compressed by a gland and a bolt, and when the valve rod and the stuffing move relatively, the stuffing generates radial force and is in close contact with the valve rod due to the plasticity of the stuffing. However, the existing packing structure generally has the defect that the sealing performance of the packing is poor, so that the reliability of valve sealing is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a sealing stuffing box with a multiple sealing structure to overcome the defects in the prior art;

in order to solve the technical problem, the utility model provides a following technical scheme:

a sealing stuffing box with a multiple sealing structure comprises a stuffing box body, an upper gland, a pressing block, a stuffing assembly, a valve rod and a sealing gasket, wherein the upper gland is arranged above the stuffing box body and provided with a bolt;

optionally, a connecting groove is formed in a contact surface between the upper end surface of the sealing stuffing box and the pressing block, and a sealing gasket is connected to the surface of the connecting groove;

optionally, the first packing ring is connected to the outer side of the first packing, and the first packing ring is connected to the inner side of the second packing;

optionally, a groove with an inverted V-shaped structure is formed in the cross section of the lower end face of the filler, and a protrusion with an inverted V-shaped structure is formed in the cross section of the upper end face of the filler II;

has the advantages that: the utility model discloses it is sealed to set up filler one and filler dual packing inside the chamber of packing to install filler ring one and filler ring two respectively, effectively increase whole leakproofness, improve work efficiency, improve whole life.

Drawings

FIG. 1 is a schematic structural view of the present invention;

the sealing device comprises a packing box body 1, a valve rod 2, an upper gland 3, a first packing 4, a second packing 5, a first packing ring 6, a second packing ring 7, a sealing gasket 8, a pressing block 9, a bolt 10, a mounting hole 12, a connecting groove 13, a sealing gasket 14 and a packing cavity 15.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, the device comprises a stuffing box body 1, an upper gland 3, a pressing block 9, a packing assembly, a valve rod 2 and a sealing gasket 8, wherein the upper gland 3 is arranged above the stuffing box body 1, the upper gland 3 is provided with a bolt 10, the top of the stuffing box body 1 is provided with a mounting hole 12, the bolt 10 is in threaded connection with the mounting hole 12, the pressing block 9 is connected with the lower surface of the upper gland 3, the valve rod 2 sequentially penetrates through the upper gland 3, the pressing block 9 and the stuffing box body 1, a packing cavity 15 is arranged inside the stuffing box body 1, the packing assembly is arranged inside the packing cavity 15 and comprises a first packing 4, a second packing 5, a first packing ring 6 and a second packing ring 7, the first packing 4 is arranged below the pressing block 9, the lower end surface of the first packing 4 is connected with the upper end surface of the second packing 5, the lower end surface of the second packing 5 is connected with the upper end surface of the sealing gasket 8, the sealing gasket 8 is connected to the bottom of the filling cavity 15; a connecting groove 13 is formed in the contact surface of the upper end surface of the sealing stuffing box and the pressing block 9, and a sealing gasket 14 is connected to the surface of the connecting groove 13; the first packing ring 6 is connected to the outer side of the first packing 4, and the first packing ring 6 is connected to the inner side of the second packing 5; the cross section of the lower end face of the filler I4 is provided with a groove with an inverted V-shaped structure, and the cross section of the upper end face of the filler II 5 is provided with a protrusion with an inverted V-shaped structure.

The working principle is as follows: when the device is used, the upper gland 3 is sealed with the stuffing box body 1 through the bolt, when the valve rod 2 and the stuffing assembly inside the stuffing cavity 15 move relatively, the first 4 stuffing and the second 5 stuffing are in close contact to ensure the overall sealing performance during the movement, the first 4 stuffing and the second 5 stuffing are in V-shaped structure connection sealing performance, the first 6 stuffing ring outside the first 4 stuffing ring and the second 7 stuffing ring inside the second 5 stuffing ring are simultaneously installed to further seal the inside of the stuffing cavity 15, and the overall sealing performance and the structural strength are improved.

Claims

1. A kind of multiple seal structure's sealed stuffing box, characterized by: the packing box comprises a packing box body (1), an upper gland (3), a pressing block (9), a packing assembly, a valve rod (2) and a sealing gasket (8), wherein the upper gland (3) is arranged above the packing box body (1), a bolt (10) is installed on the upper gland (3), a mounting hole (12) is formed in the top of the packing box body (1), the bolt (10) is in threaded connection with the mounting hole (12), the pressing block (9) is connected to the lower surface of the upper gland (3), the valve rod (2) sequentially penetrates through the upper gland (3), the pressing block (9) and the packing box body (1), a packing cavity (15) is formed in the packing box body (1), the packing assembly is arranged in the packing cavity (15), the packing assembly comprises a first packing (4), a second packing (5), a first packing ring (6) and a second packing ring (7), the first packing (4) is arranged below the pressing block (9), the lower end face of the first filler (4) is connected to the upper end face of the second filler (5), the lower end face of the second filler (5) is connected to the upper end face of the sealing gasket (8), and the sealing gasket (8) is connected to the bottom of the filler cavity (15).

2. A gland packing for a multiple seal configuration according to claim 1, wherein: the sealing stuffing box is characterized in that a connecting groove (13) is formed in the contact surface of the upper end face of the sealing stuffing box and the pressing block (9), and a sealing gasket (14) is connected to the surface of the connecting groove (13).

3. A gland packing for a multiple seal configuration according to claim 1, wherein: the first packing ring (6) is connected to the outer side of the first packing (4), and the first packing ring (6) is connected to the inner side of the second packing (5).

4. A gland packing for a multiple seal configuration according to claim 1, wherein: the cross section of the lower end face of the first filler (4) is provided with a groove with an inverted V-shaped structure, and the cross section of the upper end face of the second filler (5) is provided with a protrusion with an inverted V-shaped structure.