CN217463430U

CN217463430U - Sealing structure suitable for dusty gas large-stroke hydraulic valve

Info

Publication number: CN217463430U
Application number: CN202221168913.0U
Authority: CN
Inventors: 吴文钦; 刘长凤; 叶德豪
Original assignee: Zhisheng Chemical Industrial Co Ltd
Current assignee: Zhisheng Chemical Industrial Co Ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-09-20
Anticipated expiration: 2032-05-16

Abstract

The utility model provides a seal structure suitable for dirty gaseous big stroke hydraulic pressure valve relates to the hydraulic pressure valve field, has solved among the prior art big stroke hydraulic pressure valve and has leaked easily and strain the defect of valve rod easily in the use. It includes the stuffing box body, and the gland shaft hole has been seted up to the centre of the stuffing box body, and the gland shaft hole includes gland hole and first shaft hole, and the gland hole has spacer ring, filler and gland in proper order to the cover from inside to outside, and the second shaft hole has been seted up to gland's centre, still includes the valve rod that passes second shaft hole, filler, spacer ring and first shaft hole. The utility model is additionally provided with the spacer ring, which can play a role in positioning and guiding, ensure the valve rod switch to operate stably and protect the filler from being extruded; the outer grease groove and the inner grease groove which are additionally arranged can regularly inject grease through the grease nipple, so that the lubricating valve rod, the protective valve rod and the filler are prevented from being pulled by dust-containing gas, and meanwhile, the injected grease can effectively fill the sealing gap between the valve rod and the filler, so that the sealing effect is enhanced.

Description

Sealing structure suitable for dusty gas large-stroke hydraulic valve

Technical Field

The utility model relates to a hydraulic pressure valve field, in particular to seal structure suitable for dirty gaseous big stroke hydraulic pressure valve.

Background

The original valve rod of the hydraulic valve for the dusty gas large stroke is sealed by the filler, the valve rod shakes in the valve opening and closing process because the valve stroke is large and the medium is dusty gas, the sealing gap between the extruded filler and the valve rod is too large to cause gas leakage, the filler and the valve rod are easily damaged by dust, and the gas leakage is further increased. It is necessary to design a new structure to solve the above problems

SUMMERY OF THE UTILITY MODEL

The utility model provides a seal structure suitable for dirty gaseous big stroke hydraulic pressure valve has solved among the prior art big stroke hydraulic pressure valve and has leaked easily and strain the defect of valve rod easily in the use.

The technical scheme of the utility model is realized like this:

a sealing structure suitable for a dusty gas large-stroke hydraulic valve comprises a stuffing box body, wherein the middle of the stuffing box body is provided with an axial gland shaft hole penetrating through two ends, the gland shaft hole comprises a gland hole and a first shaft hole, the central line of the gland hole is coincident with the central line of the gland hole, the diameter of the gland hole is larger than that of the first shaft hole, a spacer ring, a filler and a gland are sequentially sleeved on the gland hole from inside to outside, the middle of the gland is provided with an axial second shaft hole penetrating through two ends, and the sealing structure further comprises a valve rod penetrating through the second shaft hole, the filler, the spacer ring and the first shaft hole; the spacer ring comprises a ring body, an outer annular grease groove and an inner annular grease groove are respectively formed in the outer circumferential surface and the inner circumferential surface of the ring body, at least two disassembly grooves used for facilitating disassembly of the spacer ring are uniformly formed in the outer circumferential surface of the ring body along the axial direction, an oil filling hole for communicating the outer grease groove with the inner grease groove is formed in the ring body, and a grease nipple corresponding to the outer grease groove or the oil filling hole is formed in the side wall of the stuffing box body.

As a further technical scheme, the end faces of the ring body are all inclined planes with high outer parts and low inner parts.

As a further technical scheme, the lower end of the stuffing box body is fixedly connected with an end plate I, a plurality of connecting holes I are formed in the end plate I, the lower end face of the stuffing gland is fixedly connected with an end plate II, and a plurality of connecting holes II are formed in the end plate II.

As a further technical scheme, the number of the oil injection holes is four, and the number of the disassembly grooves is four.

As a further technical scheme, the number of the grease nipples is one or two.

The utility model has the advantages that: the utility model is additionally provided with the spacer ring, which can play a role in positioning and guiding, ensure the valve rod switch to operate stably and protect the filler from being extruded; the added outer grease groove and the inner grease groove can regularly inject grease through the grease nipple, so that the valve rod is lubricated, the valve rod and the filler are protected from being damaged by dust-containing gas, and the injected grease can effectively fill a sealing gap between the valve rod and the filler, so that the sealing effect is enhanced; the upper surface and the lower surface of the spacer ring are processed into inward inclined planes, so that the inward extrusion of the filler in the process of filler compression can be ensured, the sealing gap between the filler and the valve rod is reduced, and the sealing effect is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

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

FIG. 2 is a front view of the spacer ring of the present invention;

fig. 3 is a top view of the spacer ring of the present invention;

fig. 4 is a partial view taken along line a-a of fig. 3.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.

Referring to fig. 1-2, a sealing structure suitable for a dusty gas large-stroke hydraulic valve comprises a stuffing box body 1, wherein an axial gland shaft hole penetrating through two ends is formed in the middle of the stuffing box body 1, the gland shaft hole comprises a gland hole 11 and a first shaft hole 12, the central lines of the gland hole 11 are coincident, the diameter of the gland hole 11 is larger than that of the first shaft hole 12, a spacer ring 2, a packing 3 and a gland 4 are sequentially sleeved on the gland hole 11 from inside to outside, an axial second shaft hole 41 penetrating through two ends is formed in the middle of the gland 4, and a valve rod 5 penetrating through the second shaft hole 41, the packing 3, the spacer ring 2 and the first shaft hole 12 is further included; the spacer ring 2 comprises a ring body 21, an outer grease groove 22 and an inner grease groove 23 which are annular are formed in the outer circumferential surface and the inner circumferential surface of the ring body 21 respectively, at least two disassembling grooves 24 used for conveniently disassembling the spacer ring are uniformly formed in the outer circumferential surface of the ring body 21 along the axial direction, an oil filling hole 25 communicated with the outer grease groove 22 and the inner grease groove 23 is formed in the ring body 21, a grease nipple 13 corresponding to the outer grease groove 22 or the oil filling hole 25 is arranged on the side wall of the stuffing box body 1, and the grease nipple 13 is used for injecting grease.

Wherein, the distance ring 2 adopts the brass material, and the quantity of 3 preferred choices of packing is two circles and more than two circles.

The lower end of the stuffing box body 1 is fixedly connected with an end plate I14, a plurality of connecting holes I15 are formed in the end plate I14, the lower end face of the stuffing gland 4 is fixedly connected with an end plate II42, and a plurality of connecting holes II43 are formed in the end plate II 42.

In a further embodiment, the upper and lower end surfaces of the ring body 21 are both inclined surfaces with a high outside and a low inside.

As a further embodiment, the number of the oil holes 25 is four, and the number of the detaching grooves 24 is four.

As a further embodiment, the number of the grease nipples 13 is one or two.

The utility model is additionally provided with the spacer ring 2, which can play a role in positioning and guiding, ensure the valve rod 5 to operate stably and protect the filler 3 from being extruded; the added outer grease groove 22 and the inner grease groove 23 can regularly inject grease through the grease nipple 13, so that the valve rod 5 is lubricated, the valve rod 5 and the filler 3 are protected from being damaged by dust-containing gas, and meanwhile, the injected grease can effectively fill a sealing gap between the valve rod 5 and the filler 3, so that the sealing enhancement effect is achieved; the upper and lower surfaces of the spacer ring 2 are processed into inward inclined planes, so that the inward extrusion of the packing in the packing 3 compressing process can be ensured, the sealing gap between the packing 3 and the valve rod 5 is reduced, and the sealing effect is improved.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a seal structure suitable for dirty gaseous big stroke hydraulic pressure valve which characterized in that:

the stuffing box comprises a stuffing box body, wherein the middle of the stuffing box body is provided with axial gland shaft holes penetrating through two ends, each gland shaft hole comprises a gland hole and a first shaft hole, the central lines of the gland holes are coincident, the diameter of each gland hole is larger than that of each first shaft hole, each gland hole is sequentially sleeved with a spacer ring, a stuffing and a stuffing cover from inside to outside, the middle of each stuffing cover is provided with an axial second shaft hole penetrating through two ends, and the stuffing box further comprises a valve rod penetrating through the second shaft holes, the stuffing, the spacer rings and the first shaft holes;

the spacer ring comprises a ring body, an outer annular grease groove and an inner annular grease groove are respectively formed in the outer circumferential surface and the inner circumferential surface of the ring body, at least two disassembly grooves used for facilitating disassembly of the spacer ring are uniformly formed in the outer circumferential surface of the ring body along the axial direction, an oil filling hole for communicating the outer grease groove with the inner grease groove is formed in the ring body, and a grease nipple corresponding to the outer grease groove or the oil filling hole is formed in the side wall of the stuffing box body.

2. A sealing structure suitable for a dusty gas large-stroke hydraulic valve according to claim 1, characterized in that: the end face of the ring body is an inclined plane with a high outer part and a low inner part.

3. A sealing structure suitable for a dusty gas large-stroke hydraulic valve according to claim 1, characterized in that: the lower extreme fixedly connected with end plate I of the stuffing box body has seted up a plurality of connecting holes I on the end plate I, gland's lower terminal surface fixedly connected with end plate II has seted up a plurality of connecting holes II on the end plate II.

4. A sealing structure suitable for a dusty gas large-stroke hydraulic valve according to claim 1, characterized in that: the oil filler point is four, the dismantlement groove is four.

5. A sealing structure suitable for a dusty gas large-stroke hydraulic valve according to claim 1, characterized in that: one or two grease nipples are provided.