CN117967801A - Sealing structure with sealing ring adjustable along axial direction - Google Patents

Sealing structure with sealing ring adjustable along axial direction Download PDF

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Publication number
CN117967801A
CN117967801A CN202311471174.1A CN202311471174A CN117967801A CN 117967801 A CN117967801 A CN 117967801A CN 202311471174 A CN202311471174 A CN 202311471174A CN 117967801 A CN117967801 A CN 117967801A
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CN
China
Prior art keywords
sealing
ring
annular
sealing ring
plate
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CN202311471174.1A
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Chinese (zh)
Inventor
杨意
刘超
吕琰
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Dalian Conservation Science & Technology Co ltd
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Dalian Conservation Science & Technology Co ltd
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Publication of CN117967801A publication Critical patent/CN117967801A/en
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Abstract

The invention relates to a sealing structure with an axially adjustable sealing ring, which comprises a plate-shaped sealing piece, an annular sealing piece, a sealing ring, a jackscrew and an annular gasket; the sealing ring is clamped between the plate-shaped sealing piece and the annular sealing piece; the annular sealing element is fixed or attached to the sealed structure; the jackscrews are more than 2 and are uniformly distributed in the circumferential direction of the corresponding sealing rings, and the sealing end faces opposite to the non-sealing end faces of one of the plate-shaped sealing elements or the annular sealing elements are axially inserted; the annular gasket corresponds to the shape and the position of the sealing ring and is clamped between the sealing ring and the top thread; the sealing ring is provided with surfaces S 1 and S 2, and the jackscrew presses the annular gasket and the surface S 2, so that the surface S 1 is attached to the sealing end face of the other sealing element. The invention has reasonable and reliable structure and performance, reduces the production, manufacturing, use, maintenance and purchasing costs, and greatly saves the social cost; the waterproof door can be widely applied to various fields and occasions including valves, fireproof doors, underground waterproof doors, vacuum doors and the like.

Description

Sealing structure with sealing ring adjustable along axial direction
Technical Field
The invention relates to a sealing structure, in particular to a sealing structure with an axially adjustable sealing ring.
Background
When the existing sealing ring is used on a workpiece with larger size, the unevenness of the workpiece with larger size is difficult to ensure due to the reasons of manufacturing, installation, use condition change and the like, so that the sealing between the two workpieces is difficult to ensure. For convenience of description, taking the valve as some plane sealing structures in the case of four-bar butterfly valve or cam valve, the caliber of the valve is generally larger, some parts between the valve seat and the valve body are usually welded together, residual stress exists in a welding mode, the residual stress needs to be eliminated through heat treatment, the cost is greatly increased, if the valve is made of stainless steel, the heat treatment is not needed, the axial surface of the valve seat is directly subjected to mechanical cutting processing without heat treatment, after the processing, the workpiece is deformed due to the residual stress of a welding workpiece, the valve plate is deformed even if the workpiece with large size is deformed, unless the valve body and the valve plate are cast, and the casting cost is quite high.
The inventor claims a cam valve (patent application number: 202011175734.5) and makes a DN3000 plane sealed valve, the sealing parts of the valve seat and the valve plate are processed by a lathe or a milling machine, the maximum clearance between the valve plate and the valve seat exceeds 3mm, so that the valve cannot realize sealing unless a soft seal such as a rubber ring with great deformation is adopted, but in some occasions, rubber materials cannot be adopted due to the limitation of the use temperature of rubber, and only mica packing, graphite packing and the like which can resist higher temperature can be adopted. However, if the deformation amount of the packing is small and the deformation amount of the large-sized sealing surface is large, the sealing is realized, and the problems caused by the deformation amount include: the packing is excessively deformed and easily damaged; the torque of the actuating mechanism is required to be greatly increased so as to ensure that all parts of the sealing ring are tightly pressed; and the problems that the strength or rigidity of each part is required to be higher, the corresponding cost is greatly increased, and the like are caused. The above-mentioned valve is merely an example, and in fact, the trouble caused by sealing is not limited to the valve, and the sealing structure in many occasions such as fire doors, underground water-proof doors, vacuum doors and the like is also involved.
Disclosure of Invention
In view of the above problems of the existing sealing structure, the invention provides a sealing structure with adjustable sealing ring parts along the axial direction.
The technical solution of the invention is realized as follows:
The sealing structure comprises a plate-shaped sealing element, an annular sealing element and a sealing ring, wherein the sealing ring is clamped between the plate-shaped sealing element and the annular sealing element, and the annular sealing element is fixed or attached to a sealed structure; the device also comprises a jackscrew and an annular gasket;
the jackscrews are more than 2 and uniformly distributed along the circumferential direction of the sealing ring, and are axially inserted from the sealing end surface of one of the plate-shaped sealing piece or the annular sealing piece, which is opposite to the non-sealing end surface;
the annular gasket corresponds to the shape and the position of the sealing ring and is clamped between the sealing ring and the top thread;
The sealing ring is provided with a surface S 1 and a surface S 2 on the other opposite side, the annular gasket is pressed with the surface S 2 through jackscrews, and then the surface S 1 is attached to the sealing end face of the other of the annular sealing piece or the plate sealing piece.
The annular seal is typically tightly secured or conformed to the barrel of the structure being sealed, such as a valve body or the like, or to a frame structure, such as the outer wall of a door frame, the ground, or the like.
Further, a limiting groove is formed in the plate-shaped sealing piece or the annular sealing piece, on which the jackscrew is inserted, corresponding to the sealing ring, the annular gasket and at least part of the sealing ring are arranged in the limiting groove, wherein the sealing ring is closer to the notch, and correspondingly, the annular gasket is closer to the bottom of the groove; typically, the surface S 1 of the seal ring is raised above the notch. The groove bottom is positioned on the sealing element provided with the limiting groove, so that the groove opening is closer to the sealing surface of the opposite sealing element than the groove bottom; for example, the limit groove is arranged on the plate-shaped sealing element, so that the groove bottom of the limit groove is positioned on the plate-shaped sealing element, and the groove opening of the limit groove is closer to the sealing surface of the annular sealing element on the opposite side of the plate-shaped sealing element than the groove bottom; otherwise, if the limiting groove is arranged on the annular sealing piece, the groove bottom of the limiting groove is positioned on the annular sealing piece, and the notch of the limiting groove is closer to the sealing surface of the plate-shaped sealing piece.
The limiting groove is used for determining and stabilizing the position of the sealing ring so as to ensure the sealing effect of the sealing ring, and in order to better place the sealing ring in the limiting groove so as not to slip, the notch of the limiting groove is narrower than the bottom of the groove and forms a dovetail groove.
Specifically, the notch of the limiting groove is positioned on the sealing end surface of the plate-shaped sealing element or the annular sealing element, namely the limiting groove is a groove dug inwards from the sealing end surface of the plate-shaped sealing element or the annular sealing element. For example, the limited groove is located on the annular sealing element, that is, the groove is dug inwards from the sealing end surface of the annular sealing element, correspondingly, a jackscrew is inserted into and propped against the annular gasket from the non-sealing end surface of the annular sealing element along the axial direction corresponding to the bottom of the groove, and when the jackscrew is continuously propped against along the axial direction, the annular gasket is pressed with the surface S 2 of the sealing ring, so that the surface S 1 of the sealing ring is pressed and adhered with the sealing end surface of the plate-shaped sealing element; for another example, the limiting groove may be formed in the plate-shaped sealing member, that is, the groove is dug inward from the sealing end surface of the plate-shaped sealing member, and accordingly, the jackscrew is inserted into and abuts against the annular gasket from the non-sealing end surface of the plate-shaped sealing member along the axial direction corresponding to the bottom of the groove, and when the jackscrew continues to abut against along the axial direction, the annular gasket is pressed against the surface S 2 of the sealing ring, so that the surface S 1 of the sealing ring is pressed against and attached to the sealing end surface of the annular sealing member.
Or the limit groove can be formed by more than two circles of convex walls (or convex rings) protruding outwards on the sealing end surface of the plate-shaped sealing element or the annular sealing element, the notch (higher than the sealing end surface) is formed by the upper edge of the convex walls, and at the moment, the groove bottom is usually positioned on the sealing end surface of the plate-shaped sealing element or the annular sealing element or the groove bottom is positioned on the sealing end surface of the plate-shaped sealing element or the annular sealing element and is not higher than the sealing end surface of the plate-shaped sealing element or the annular sealing element; the convex wall can be fixedly connected with the sealing end face of the sealing element where the convex wall is located or integrally processed with the sealing element. For example, the limiting groove is located on the sealing end face of the annular sealing element and is surrounded by two rings of convex walls fixed on the sealing end face, the groove bottom is located on the sealing end face of the annular sealing element, the notch is formed by the upper edges of the two rings of convex walls, correspondingly, the jackscrew is inserted through and propped against the annular gasket from the non-sealing end face of the annular sealing element along the axial direction corresponding to the groove bottom of the limiting groove (namely, the sealing end face of the annular sealing element corresponding to the surrounding of the two rings of convex walls), and when the jackscrew is continuously propped against the sealing ring along the axial direction, the annular gasket is pressed with the surface S 2 of the sealing ring, and then the surface S 1 of the sealing ring is pressed and attached with the sealing end face of the opposite plate-shaped sealing element. Similarly, when the limiting groove is located on the sealing end face of the plate-shaped sealing element, the limiting groove can be formed by two circles of convex walls (or convex rings) fixed on the sealing end face, and the corresponding positional relationship among the jackscrew, the annular gasket, the sealing ring and the opposite annular sealing element, the pressing sealing mode of the jackscrew, the annular gasket, the sealing ring and the opposite annular sealing element, and the like are similar, and the repeated description is omitted. In this way, the thickness of the respective seal (annular seal or plate seal, the limiting groove being provided on its sealing end face) can be reduced to a certain extent, reducing the raw material costs and the processing costs.
Further, at least one circle of convex wall is surrounded by more than two broken convex wall sections, and the broken connection between the adjacent convex wall sections is called a notch of the convex wall. If necessary, the convex wall section or the limit groove can be locally deformed radially by an external force such as hammering the convex wall section, so that the sealing ring at the corresponding position is clamped in the limit groove.
In particular, when the sealing structure is applied to a valve, the limiting groove can be usually opened on the valve seat, and then the sealing ring is also fixed on the valve seat, so that the sealing ring is positioned at the downstream of the medium flow direction to avoid being scoured by the medium.
In order to ensure the sealing effect, the sealing ring is usually tightly attached to the inner side wall of the limiting groove, and radial deformation is correspondingly generated after the sealing ring is tightly pressed, so that the attaching effect of the sealing ring and the inner side wall of the limiting groove and the better sealing effect are further improved.
The large-size sealing ring is manufactured by coiling sealing materials into a ring in an end-to-end lap joint mode, and the processing difficulty of the whole ring is high in general and the cost is high.
Or in order to avoid the sealing effect from being influenced by the fracture of the sealing ring caused by heat expansion and cold contraction or other reasons, the sealing ring is formed by sleeving a large concentric ring and a small concentric ring along the radial direction, wherein the inner diameter of the large outer ring is matched with the outer diameter of the small inner ring. On the basis of the double-layer sealing ring, at least one layer of the two layers of sealing rings is formed by enclosing a plurality of sealing arc sections which are disconnected and not connected, and the disconnection position of two adjacent sealing arc sections is called a sealing ring notch; when the two layers of sealing rings are respectively formed by encircling a plurality of disconnected sealing arc sections, the incisions of the inner sealing ring and the outer sealing ring are staggered, and the two layers of sealing rings are the double-layer sleeved and segmented sealing rings. By "matching" is meant herein that the corresponding dimensions of the two concentric rings (i.e., the inner diameter of the large ring is comparable to the outer diameter of the small ring) are just as tight as possible; by "seal arc segment" is meant a segment of a seal arc formed from a seal material.
Accordingly, the annular gasket may be a gasket ring segment comprising a plurality of segments that are disconnected and configured with corresponding jackscrews corresponding to the seal arc segments. Namely, the jackscrew, the gasket ring section and the sealing arc section are mutually corresponding in position, so that the jackscrew is propped against the annular gasket, and then the surface S 1 of the sealing ring is pressed with the sealing surface of the sealing piece on the opposite side to achieve the sealing effect.
Specifically, the sealing ring is a rubber ring or a packing;
the rubber ring can be solid or can also be an inflatable hollow air bag;
the packing can adopt graphite packing, polytetrafluoroethylene packing or mica packing and the like.
Compared with the prior art, the invention has the following advantages:
(1) The sealing structure can adopt a rivet welding structure or a corresponding sealed structure to replace a casting, so that the sealing structure can be applied to a valve, and a valve plate (namely a plate-shaped sealing piece), a valve seat (namely an annular sealing piece) and a valve body (a sealed structure) can all adopt rivet welding pieces.
(2) The invention omits the procedure of heat treatment on the corresponding rivet welding structure or accessories, and has good usability, such as tightness; the problem that the sealing difficulty and the sealing property are poor due to the fact that the rivet welding piece is deformed greatly without heat treatment and uniform contact among accessories of a sealing structure cannot be guaranteed is solved while the problem that the stainless steel is poor in heat treatment manufacturability is solved; moreover, the heat treatment process of the large-sized workpiece is complex, the process cost is high, and the corresponding structure or accessory does not need heat treatment, so that the production and manufacturing cost is obviously further reduced.
(3) As described above, the present invention does not use conventional castings, nor does it perform heat treatment on the corresponding rivet welding structure or fitting, and the problem of deformation caused by the heat treatment is that the corresponding parts of the corresponding fitting of the sealing structure are tightly attached to the sealing ring under the uniform compression of the axial compression force thereof by more flexible and relatively free coordination and axial adjustment among the jackscrew, the annular gasket and the sealing ring, thereby ensuring good sealing property. Meanwhile, the problems that the pressing force is uneven and the sealing ring is deformed greatly locally so that the sealing ring cannot be attached to the valve plate under the condition of no jackscrew and no annular gasket, or the pressing force is extremely uneven so that the sealing ring is damaged in order to attach the local structure to the sealing ring, or an actuating mechanism is required to realize the pressing or sealing with extremely large torque and the corresponding generation are avoided.
(4) The invention does not need to adopt a large-torque actuating mechanism, so that the requirements on mechanical properties (including strength and rigidity) of components, parts and the like of the sealing structure are reduced, thereby avoiding unnecessary increase of materials and process cost.
(5) The improved structure ensures that the service performance of the invention is more reliable, the corresponding purchasing, using and maintaining costs are greatly reduced, the social cost is saved, and good social benefit is created.
The invention can be widely used in various fields and occasions including fireproof doors, underground waterproof doors, vacuum doors and the like besides valve occasions.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 according to the present invention;
fig. 2 is a schematic structural view of embodiment 2 according to the present invention;
FIG. 3 is a schematic illustration of a seal ring in an end-to-end lap joint according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of a double-layer socket and segmented seal ring according to an embodiment of the present invention;
FIG. 5 is a schematic view of a combination of annular gaskets, jackscrews, and limiting grooves, etc. with which the seal ring of FIG. 4 is adapted;
FIG. 6 is a cross-sectional view A-A of FIG. 5;
Fig. 7 is a schematic structural view of embodiment 3 according to the present invention;
fig. 8 is a B-B cross-sectional view of fig. 7. In the figure:
1. Actuator 2, annular seal 3, barrel or frame 4, jackscrew 5, annular gasket 6, seal ring 6-1, seal ring head-to-tail overlap 7, plate seal 8, drive 9, drive shaft 10, outer seal ring (outer ring) 10-1, outer ring cutout 11, inner seal ring (inner ring) 11-1, inner ring cutout 12, inner ring 12-1 of the limiting groove, limiting notch 13 on the inner ring, outer ring 14 of the limiting groove, groove-type limiting groove (or limiting groove) S 1, surface S 2 of the seal ring opposite or in compression with one of the seals, surface of the seal ring opposite or in compression with the annular gasket
Description of the embodiments
The present invention will now be described in further detail with reference to examples. The described embodiments (including illustrations) are merely exemplary in nature and are not intended to limit the scope of the invention, and the various features mentioned therein are combined or combined within a reasonable range and all are intended to be included in the scope of the invention.
Examples
The sealing structure comprises an actuating mechanism 1, a transmission shaft 9, a transmission mechanism 8, an annular sealing element 2, a plate-shaped sealing element 7, a sealing ring 6 and a limit groove thereof, an annular gasket 5 and a jackscrew 4 as shown in figure 1;
the radially outer side of the annular seal 2 is in close contact with and fixed to the inner wall of a cylinder or frame 3.
In this example, the limit groove and the jackscrew 4 are provided on the side of the annular seal 2: the limiting groove is an annular groove type limiting groove 14, which is formed by digging inwards from the sealing end surface of the annular sealing element 2 (namely the end surface of the annular sealing element 2 in sealing fit with the plate-shaped sealing element 7) and is used for accommodating the sealing ring 6 and the corresponding annular gasket 5, the notch of the limiting groove is positioned on the sealing end surface of the annular sealing element 2, the sealing ring 6 is tightly embedded in the limiting groove, the annular gasket 5 is arranged between the sealing ring 6 and the groove bottom of the limiting groove 14, and the shape of the annular gasket is matched with the shape of the sealing ring 6; the jackscrew 4 and corresponding jackscrew hole (which has internal screw thread matched with jackscrew) are several, the position corresponding to the limit groove 14 and the sealing ring 6 is circumferentially arranged, the non-sealing end surface of the annular sealing element 2 is inserted into the limit groove 14 along the axial direction to be propped against the annular gasket 5, when the jackscrew 4 is continuously propped against the axial direction, the annular gasket 5 is pressed with the surface S 2 of the sealing ring 6, and then the surface S 1 of the sealing ring 6 is pressed and attached with the sealing end surface of the opposite plate-shaped sealing element 7.
The sealing structure, if used on the valve, the annular sealing element 2 is the valve seat, the plate-shaped sealing element 7 is the valve plate, and the cylinder or the frame 3 is the valve body. The limit groove 14 is normally open on the valve seat (i.e. the annular sealing member 2), and correspondingly, the sealing ring 6 is fixed on the valve seat and is positioned downstream of the medium flow direction, so that the flushing of the medium by the sealing ring is avoided or reduced.
In order to ensure the sealing effect, the sealing ring 6 is tightly attached to the radial inner wall of the limit groove 14, and radial deformation generated when the sealing ring 6 is tightly pressed can enable the sealing ring 6 to be tightly attached to the limit groove 14, so that a better sealing effect is obtained.
In particular to the structure of the sealing ring, in consideration of the problems of large difficulty in the whole circle processing technology of the sealing ring with large size, high cost and difficult guarantee of product quality, in at least one embodiment, a structure formed by coiling sealing materials into a circle and overlapping the sealing ring end to end can be adopted, as shown in fig. 3. Specifically, the seal ring 6 is embedded in the limit groove 14, and the whole seal ring comprises the head-tail overlap joint section 6-1, and the thickness, the length and the length are adapted to the corresponding size of the limit groove 14. For example, the sealing ring coiled and embedded in the limiting groove 14 is respectively cut off from the middle diameter of the sealing ring 6 to the outside in the radial direction at one end and correspondingly cut off from the inside in the radial direction at the other end at the head and tail overlapping sections 6-1 of the sealing ring, namely, the two ends of the sealing ring 6 are respectively used as references, and the rest parts of the two ends are tightly embedded in the limiting groove 14 after being stuck together. Or the two ends of the sealing ring 6 embedded in the limit groove 14 are overlapped in the radial direction, and the size of the limit groove 14 corresponding to the overlapped part is enough to enable the head and tail overlapped section 6-1 of the sealing ring to be tightly embedded in the limit groove; this approach is particularly applicable to large bore seal ring situations. The annular gasket 5 and the jackscrew 4 are correspondingly configured corresponding to the head-tail overlap joint section 6-1 of the sealing ring.
Furthermore, in order to avoid the problem that the sealing effect is affected due to the breakage of the sealing ring caused by various reasons including thermal expansion and contraction, in at least one embodiment, the sealing ring 6 may be configured by a double concentric ring sleeving structure, as shown in fig. 4, wherein the inner diameter of the outer (large ring) sealing ring 10 is matched with the outer diameter of the inner (small ring) sealing ring 11 (i.e. the inner diameter of the large ring is equal to the outer diameter of the small ring). In order to further reduce the influence and damage to the sealing effect caused by the breakage of the sealing ring, we can use a double-layer sleeved and segmented sealing ring, that is, on the basis of the double-layer sleeved structure, each layer of sealing ring is formed by encircling a plurality of disconnected and disconnected sealing arc sections, the disconnected connection position of two adjacent sealing arc sections of each layer of sealing ring is called a sealing ring notch, and the notch 11-1 of the inner layer sealing ring and the notch 10-1 of the outer layer sealing ring are staggered, preferably, for example, each notch 11-1 on the inner ring is positioned at the position approximately midway between two adjacent notches 10-1 on the outer ring, and vice versa, that is, each notch 10-1 on the outer ring is positioned at the position approximately midway between two adjacent notches 11-1 on the inner ring; the double-layer sleeved and segmented structure can also be a structure with only one layer of sealing rings segmented. In correspondence with this segmented gasket structure, the annular gasket 5 is a gasket ring segment (collectively referred to as segmented annular gasket) comprising a plurality of segments that are disconnected and are in correspondence with the seal arc segments and are provided with corresponding jackscrews. Namely, through proper correspondence of the positions of the jackscrew, the gasket ring section and the sealing arc section, the sealing effect of pressing the surface S1 of the sealing ring against the annular gasket by the jackscrew and then pressing the sealing surface of the sealing piece on the opposite side is realized and ensured, as shown in fig. 5.
Specifically, the sealing ring is a rubber ring or a packing;
the rubber ring can be solid or can also be an inflatable hollow air bag;
the packing can adopt graphite packing, polytetrafluoroethylene packing or mica packing and the like.
In at least one embodiment, in order to better place the seal ring in the limit groove without slipping, the notch of the limit groove is narrower than the groove bottom, and forms a dovetail groove or the like, as shown in fig. 6.
Examples
A sealing structure, as shown in fig. 2, is substantially the same as that of embodiment 1, and is mainly different in that: in this case, the annular groove-type limiting groove 14 and the jackscrew 4 are provided on one side of the plate-like seal 7; namely, the groove type limiting groove 14 is formed by digging inwards from the sealing end face of the plate-shaped sealing element 7 (namely, the end face of the plate-shaped sealing element 7 in sealing fit with the annular sealing element 2) and is used for accommodating the sealing ring 6 and the corresponding annular gasket 5, the notch of the groove type limiting groove is positioned on the sealing end face of the plate-shaped sealing element 7, the sealing ring 6 is tightly embedded in the groove type limiting groove, and the annular gasket 5 with the shape matched with the shape of the sealing ring 6 is arranged between the sealing ring 6 and the groove bottom of the limiting groove; the top thread 4 and the corresponding top thread holes are circumferentially arranged at positions corresponding to the groove type limiting groove 14 and the sealing ring 6, the non-sealing end face of the plate-shaped sealing piece 7 is inserted into the limiting groove 14 along the axial direction to be propped against the annular gasket 5, and when the top thread 4 is continuously propped against the axial direction, the annular gasket 5 is pressed with the surface S 2 of the sealing ring 6 and then the surface S 1 of the sealing ring 6 is pressed and attached with the sealing end face of the opposite annular sealing piece 2.
Examples
On the basis of the foregoing embodiment, the sealing structure in this embodiment, as shown in fig. 7 and 8, adopts the double-layer sleeved and segmented sealing ring (including the inner ring 11 and the outer ring 10) described in connection with fig. 4, and is correspondingly provided with the segmented annular gasket 5 and the jackscrew 4 corresponding to the positions thereof, as shown in fig. 5.
In order to reduce the thickness of the annular seal 2 and to reduce the corresponding machining, save materials and production costs, the seal structure also changes the structure of its limit groove: the limiting groove can be formed by two rings of convex walls or convex rings (namely an inner ring 12 and an outer ring 13) which are raised on the sealing end surface of the annular sealing element 2, the groove bottom of the limiting groove is positioned on the sealing end surface of the annular sealing element 2, and a notch (higher than the sealing end surface of the corresponding annular sealing element 2) is formed by the upper edges of the inner ring 12 and the outer ring 13; the inner ring 12 and the outer ring 13 may be fixedly connected to the sealing end surface of the annular seal member 2 where they are located or may be integrally formed with the annular seal member 2 or the sealing surface thereof. Correspondingly, the jackscrew 4 is inserted through the groove bottom of the limit groove (namely, the seal end surface of the annular seal member 2 corresponding to the annular groove enclosed by the inner ring 12 and the outer ring 13) and abuts against the annular gasket 5 along the axial direction from the non-seal end surface of the annular seal member 2, then when the jackscrew 4 continues to abut against along the axial direction, the annular gasket 5 is pressed together with the surface S 2 of the seal ring (which is formed by the surfaces of the corresponding positions of the inner ring 11 and the outer ring 10 together), and the surface S 1 of the seal ring (which is also formed by the surfaces of the corresponding positions of the inner ring 11 and the outer ring 10 together) is pressed together with the seal end surface (not shown in the figure) of the opposite plate-shaped seal member.
Further, the inner ring 12 of the limiting groove adopts a sectional structure, that is, the inner ring 12 is surrounded by more than two broken convex wall (or ring) sections, and the broken connection between the adjacent convex wall sections is called as a limiting notch 12-1 on the inner ring. The limit of the sealing ring can be more flexible due to the structural design: even if the convex wall section or the limit groove is locally deformed in the radial direction by external force such as hammering, the sealing ring at the corresponding position is clamped in the limit groove.
Similar to the above-mentioned limit grooves, the double-ring type limit groove (surrounded by the inner ring 12 and the outer ring 13) in this embodiment may also have a structure with a wide groove bottom and a narrow notch, as shown in fig. 8, so as to increase the limit and anti-slip effects of the seal ring disposed therebetween.
It is to be understood that the above-described embodiments are merely some of the embodiments of the present invention, and are intended to be illustrative and not limiting. On the basis of the above, any person skilled in the art shall properly and reasonably cover the protection scope of the present invention, within the scope of the present invention disclosed in the present invention, according to the technical solution and the inventive concept of the present invention, without creative effort.

Claims (11)

1. The sealing structure comprises a plate-shaped sealing element, an annular sealing element and a sealing ring; the sealing ring is clamped between the plate-shaped sealing piece and the annular sealing piece; the annular sealing element is fixed or attached to the sealed structure; the novel water heater is characterized by further comprising a jackscrew and an annular gasket;
The jackscrews are more than 2 and are uniformly distributed corresponding to the annular direction of the sealing ring, and the jackscrews are axially inserted from the sealing end face of one of the plate-shaped sealing piece or the annular sealing piece, which is opposite to the non-sealing end face;
the annular gasket corresponds to the shape and the position of the sealing ring and is clamped between the sealing ring and the top thread;
The sealing ring is provided with a surface S 1 and a surface S 2 on the other opposite side, the annular gasket is pressed with the surface S 2 through jackscrews, and then the surface S 1 is attached to the sealing end face of the other of the annular sealing piece or the plate sealing piece.
2. The seal structure of claim 1, wherein:
the plate-shaped sealing piece or the annular sealing piece, on which the jackscrew is inserted, is provided with a limiting groove corresponding to the sealing ring, and the annular gasket and at least part of the sealing ring are arranged in the limiting groove, wherein the sealing ring is closer to the notch.
3. The seal structure of claim 2, wherein:
The notch of the limiting groove is narrower than the groove bottom.
4. The seal structure of claim 2, wherein:
The notch of the limiting groove is positioned on the sealing end face of the plate-shaped sealing element or the annular sealing element, namely the limiting groove is a groove dug inwards from the sealing end face of the plate-shaped sealing element or the annular sealing element.
5. The seal structure of claim 2, wherein:
The limiting groove is formed by more than two rings of convex walls protruding outwards on the sealing end face of the plate-shaped sealing piece or the annular sealing piece, and the notch is formed by the upper edges of the convex walls.
6. The seal structure of claim 5, wherein:
at least one circle of convex wall is surrounded by more than two broken convex wall sections.
7. The seal structure of claim 1, wherein:
the sealing ring is formed by overlapping the ends of a sealing material coiled into a ring.
8. The seal structure of claim 1, wherein:
The sealing ring is formed by sleeving a large layer of concentric ring and a small layer of concentric ring along the radial direction.
9. The seal structure of claim 8, wherein:
one layer of the two layers of sealing rings is surrounded by a plurality of disconnected sealing arc sections, and a fracture is arranged between every two adjacent sealing arc sections; or the two layers of sealing rings are respectively surrounded by a plurality of sealing arc sections, and the fracture parts of the two layers of sealing rings are staggered.
10. The seal structure of claim 9, wherein:
the annular gasket comprises a plurality of gasket ring segments which are disconnected and disconnected, and the gasket ring segments and the sealing arc segments correspond to each other and correspondingly configure the jackscrews.
11. The seal structure of claim 1, wherein:
The sealing ring is a rubber ring or a packing;
the rubber ring is solid or hollow and is internally inflatable;
The packing is graphite packing, polytetrafluoroethylene packing or mica packing.
CN202311471174.1A 2023-10-30 2023-11-07 Sealing structure with sealing ring adjustable along axial direction Pending CN117967801A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2023114128974 2023-10-30
CN202311412897 2023-10-30

Publications (1)

Publication Number Publication Date
CN117967801A true CN117967801A (en) 2024-05-03

Family

ID=90852102

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311471174.1A Pending CN117967801A (en) 2023-10-30 2023-11-07 Sealing structure with sealing ring adjustable along axial direction

Country Status (1)

Country Link
CN (1) CN117967801A (en)

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