CN209856382U - Mechanical seal for liquids with peripheral edge - Google Patents
Mechanical seal for liquids with peripheral edge Download PDFInfo
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- CN209856382U CN209856382U CN201920351903.2U CN201920351903U CN209856382U CN 209856382 U CN209856382 U CN 209856382U CN 201920351903 U CN201920351903 U CN 201920351903U CN 209856382 U CN209856382 U CN 209856382U
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- ring
- liquid
- peripheral edge
- seal
- edge
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Abstract
The utility model relates to a mechanical seal is used to liquid with peripheral edge, including rotating ring and quiet ring, the tip of rotating ring and quiet ring for laminating friction each other, with axis vertically seal end face, isolated terminal surface one side liquid leaks to the opposite side, at least one in rotating ring and quiet ring is highly outstanding outside the liquid side and to the edge that encloses of short ring direction slope for transmission equipment is when moving, encloses the inclined plane department on edge and takes place the liquid turbulence, and the centrifugal force of production lets particulate matter or impurity in the liquid keep away from seal end face, thereby effectively prevents granule or impurity in the liquid and get into sealed face, and increased the ring body intensity of sealing ring, enlarged ring body heat radiating area, show promotion liquid seal effect and life.
Description
Technical Field
The invention relates to a mechanical sealing technology for liquid, in particular to a friction sealing ring with two ring surfaces which are tightly attached and vertical to an axis, and specifically relates to a movable ring and a stationary ring for mechanical sealing for liquid, which are provided with peripheral edges.
Background
In the prior art, the sealing forms of the fluid seal include four main forms of filler seal, rubber seal, dry gas seal and mechanical seal. Wherein, the packing seal (commonly called packing seal) mainly comprises a packing, a packing box and a packing fixing piece. The packing seal is a seal which is tightly contacted with a shaft by radial force generated by plastic deformation of packing pressed by a fixing piece, and the packing seal abrades the shaft and has little leakage. The rubber ring seal is mainly used for reciprocating hydraulic pneumatic seal or rotary oil seal with almost no pressure; the sealing forms of the packing seal and the rubber ring seal do not belong to mechanical seals. Mechanical seals are defined in the relevant national standards as follows: "means for preventing fluid leakage, which is composed of at least one pair of end faces perpendicular to the rotation axis, and which are kept in contact and relatively slide under the action of fluid pressure and the elastic force (or magnetic force) of the compensating mechanism and the cooperation of the auxiliary seal". The difference is that the sealing ring of the mechanical seal is made of rigid material, so that the elastic force or magnetic force needs to be compensated behind the mechanical seal; on the contrary, the elastic or filler material cannot be designed according to the above national standard because of the larger resistance. The fluid mechanical seal can be divided into a sealing ring contact type seal and a non-contact type seal, wherein the non-contact type mechanical seal is a special form of the mechanical seal, namely a dry gas seal, which is applied to gas conveying equipment of an ocean platform and appears in the late 70 s abroad. The three sealing rubber seals, the packing seal and the dry gas seal are irrelevant to the invention, the first two types of seals have large friction force, wear shafts tend to be eliminated gradually, and the sealing rubber seals, the packing seal and the dry gas seal are only suitable for occasions where mechanical seals cannot be used, and are limited by the cleaning degree of media and the manufacturing cost with limited use. The invention is mainly a contact type mechanical seal, and is a sealing device which is used for isolating fluid in a pump body from air outside the pump and is the most common pump rotating equipment in the world at present.
In the contact type mechanical seal for the pump, although the common seal ring designs in various forms are regular in the design of the seal ring, the common point is that the dynamic and static seal rings are flush at one side contacting liquid, namely the diameters are the same, because the impurities in the liquid are prevented from accumulating, colliding and entering the seal surface at the contact point; the side contacting with the air is not level, and the design of one ring narrow and one ring wide is adopted to reduce the friction because the problem of impurities does not exist; the above is a reasonable design in accordance with hydromechanics and thermodynamics. On the contrary, if the mechanical seal with the end of the sealing ring contacting the liquid being not flush is often a special case, the specific working conditions of the fluid seal with different media are roughly listed as follows: for example, although one ring is higher than the other ring at one end of a dynamic and static sealing ring contacting liquid, the higher part is vertical, so that impurity particles are easily accumulated and enter a sealing surface, and the sealing surface is in a special form for sealing under special working conditions; for example, in chinese patents CN205534228U and CN204692584U and US patent 9841108B2, although one end of the dynamic and static sealing rings contacting liquid is higher than the other, the high rings on the contacting surface are not inclined, but the narrow rings are inclined, so that the V-shaped angle formed by the inclined high rings is more likely to cause magazine accumulation in the liquid, and is also a special form for special working condition sealing; for another example, in chinese patents CN206338413U and CN207178077U and japanese patent JP2005-113983A, JP2007-139140a, although one end of the dynamic and static sealing ring contacting the liquid is higher than the other, the wide ring part is higher than and inclined backward, and cannot shield large particles of impurities in the liquid from entering the sealing surface, and the sealing ring is also a special form for special working condition sealing. The special sealing forms of the special working conditions are different in consideration, and the common characteristics are not suitable for media in fluid, because the problems of impurity accumulation, collision and entering of sealing contact surfaces caused by the fact that two rings on one side of the liquid contact surface are not even are not solved, and if the special sealing forms are used in general liquid, impurity particles enter a friction sealing surface to cause abrasion of the sealing end surfaces due to abrasive particles, so that early failure of sealing is caused. Because of this, in mechanical seals for pumps which are in contact with possibly contaminating particles, a flush sealing surface on the liquid side is still the most common design.
Disclosure of Invention
In order to solve the technical defects of the existing mechanical seal for liquid, the invention provides the mechanical seal for liquid, which can effectively lead solid impurities in the liquid to be far away from the sealing end surface and is provided with the forward-inclined peripheral edge, thereby reducing the possibility of accumulation, collision and entering of the impurities into the sealing surface. This sealing ring peripheral hardware high convex encloses along and towards liquid place side, because liquid relative motion and take place the turbulent flow at the convex inclined plane that encloses the edge, non-liquid impurity is because discharge or keep away from the sealing end face along the inclined plane under the centrifugal force effect, prevent effectively that non-liquid material from getting into the sealed anchor ring of damage friction, increase the protrusion and enclose along the ring body intensity that has improved the sealing ring, ring body heat radiating area has been enlarged, sealed face friction thermal deformation volume has been reduced, show promotion liquid seal effect and life, be more for the mechanical seal for the liquid of ideal.
In order to achieve the aim, the invention adopts the following innovative design and technical scheme:
the liquid mechanical seal with the peripheral edge comprises a movable ring and a stationary ring, wherein a spring or a corrugated pipe is arranged on the movable ring or the stationary ring along the axial direction, and the elastic force enables the end faces of the movable ring and the stationary ring to be attached and enables the end faces to be perpendicular to the axial direction; the contact surface of the movable ring and the static ring is provided with air on one side and liquid on the other side, and the movable ring and the static ring are tightly attached to prevent the liquid from leaking from one side to the other side. The movable ring is characterized in that the widths of the sections of the movable ring and the static ring are different, so that the end parts of the movable ring and the static ring are attached; the liquid side of the movable ring and the static ring is provided with a ring edge with larger section width and protruding radial height, the ring with narrower section width is close to the liquid side and is parallel to the axis without protruding, and the ring edge inclines forwards to the ring side with narrower section width.
In a preferred embodiment of the present invention, the liquid having the peripheral edge is mechanically sealed, and the peripheral edge is disposed only outside the contact surface between the moving ring and the stationary ring.
In a preferred embodiment of the present invention, the liquid having the peripheral edge is sealed by a mechanical seal, and the peripheral edge is disposed only inside the contact surface between the moving ring and the stationary ring.
As an optimized scheme of the invention, the liquid with the peripheral edge is mechanically sealed, and the movable ring is of an integral or split structure; the stationary ring is of a monolithic or split structure.
In a preferred embodiment of the present invention, the liquid having the peripheral edge is mechanically sealed, and the connection between the forward inclined portion of the peripheral edge and the contact surface of the movable ring and the stationary ring is an arc inclination, a diagonal inclination, or a right angle.
In an embodiment of the present invention, the liquid having the peripheral edge is sealed by a mechanical seal, and a connecting point of the peripheral edge and the attaching surface intersects with a forward tilting point of the peripheral edge or has a distance greater than zero.
As a preferred scheme of the invention, the liquid with the peripheral edge is mechanically sealed, and the inclined surface of the peripheral edge is provided with a bulge.
In a preferred embodiment of the present invention, the liquid having the peripheral edge is mechanically sealed, and the cross section of the peripheral edge is a cone, a polygon, an arc, or any combination of the cone, the polygon and the arc.
In an embodiment of the present invention, the liquid having the peripheral edge is mechanically sealed, and the movable ring and the stationary ring are made of any one of plastic, ceramic, graphite, and metal alloy.
The invention achieves the following beneficial effects:
(1) when the rotating ring rotates, the liquid is driven to rotate through the enclosing edge, so that solid impurities in the liquid are far away from the binding face of the rotating ring and the static ring, and the impurities are prevented from being accumulated at the contact position of the contact face of the sealing ring and the medium.
(2) The surrounding edge can be arranged on the inner side or the outer side of the contact surface of the movable ring and the static ring, and the two structures have the characteristics respectively and can meet various use scenes.
(3) The surrounding edge shields large-particle solid impurities in liquid, and the impurities are prevented from being accumulated at the contact position of the contact surface of the sealing ring and a medium.
(4) The surrounding edge enlarges the heat dissipation area of the ring body and reduces the heat deformation.
(5) The surrounding edge properly reduces the friction force of the sealing surface and prolongs the service life.
Drawings
FIG. 1 is an axial cross-sectional view of an embodiment of the present invention in a mechanical seal application;
FIG. 2 is an axial sectional view of a seal ring structure with a wider and narrower cross section according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a structure with a larger cross-sectional width according to a first embodiment of the present invention;
FIG. 4 is an axial sectional view of a second embodiment of the invention with a larger cross-sectional width;
FIG. 5 is an axial cross-sectional view of a third embodiment of the invention with a larger cross-sectional width;
FIG. 6 is an axial cross-sectional view of a fourth embodiment of the invention with a larger cross-sectional width;
FIG. 7 is an axial cross-sectional view of a fifth embodiment of the invention with a larger cross-sectional width;
FIG. 8 is an axial cross-sectional view of a sixth embodiment of the invention with a larger cross-sectional width;
FIG. 9 is an axial cross-sectional view of a seventh embodiment of the invention with a larger cross-sectional width;
FIG. 10 is an axial cross-sectional view of an eighth embodiment of the invention with a larger cross-sectional width;
FIG. 11 is an axial cross-sectional view of an eighth embodiment of the present invention in a cartridge-type mechanical seal application;
the reference numbers in the figures illustrate:
1-movable ring, 2-stationary ring, 3-shaft, 4-gland, 5-surrounding edge, 6-shell, 7-spring, 8-movable ring sealing end face, 9-stationary ring sealing end face, 10-shaft sleeve, 11-locking ring, 51-inclined connecting line I, 52-inclined connecting line II, 53-inclined connecting line III, 54-inclined connecting line IV, 55-inclined connecting line V, 56-inclined connecting line VI, 57-inclined connecting line seven and 58-right-angle connecting line eight.
The specific implementation mode is as follows:
the invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The first embodiment is as follows:
as shown in fig. 1, 2 and 3: the embodiment discloses a mechanical seal with a peripheral edge for liquid, which comprises a movable ring and a stationary ring, wherein a spring 7 or a corrugated pipe is arranged along the axial direction of the movable ring 1 or the stationary ring 2, and the sealing end face of the movable ring 1 or the stationary ring 2 is tightly attached and is vertical to a shaft 3; the movable ring 1, the spring or the corrugated pipe are fixedly connected with the shaft 3, the stationary ring 2 and the gland 4 are fixedly connected with the shell 6, the shaft 3 and the shell 6 rotate relatively, and liquid on one side of the isolated sealing end face leaks to one side close to the shaft 3. The width of the movable ring 1 is larger than that of the static ring 2, the width of the ring is 1/2 which is the difference between the diameters of the outer circle and the inner circle of the cross section of the two rings, and the static ring sealing end face 9 and the movable ring sealing end face 8 are not completely attached due to the difference of the widths of the two rings; wherein, on the liquid side of the sealing surface, the movable ring 1 is provided with an enclosing edge 5, and the static ring 2 with small diameter does not have any protrusion (hollow cylinder structure); the part of the surrounding edge 5 protrudes along the axial direction of the movable ring 1 or the static ring 2 and is provided with a slope, and the inclination angle (a in figure 2) of the slope is more than 10 degrees.
The movable ring 1 is of an integral or split structure; the stationary ring 2 is of a unitary or split construction. The integral structure means that the movable ring 1 or the static ring 2 is an integral body and cannot be disassembled; the split structure is that the movable ring 1 or the static ring 2 is detachable and is a part consisting of a plurality of different parts.
I.e. the difference between the inside diameter of the skirt and the outside diameter of the narrower width ring is equal to or greater than zero, the end of the narrower width sealing ring is not in contact with the skirt.
The surrounding edge 5 of the embodiment inclines forwards outside the seal end face 8 of the movable ring, the inclined connecting line 51 between the inclined part and the vertical line of the seal face 8 is an inclined line, and the inclined part of the surrounding edge 5 starts from the end point of the contact face of the seal end face 9 of the static ring. The surface roughness of the contact part of the dynamic ring sealing end surface 8 and the static ring sealing end surface 9 is less than 0.6 micrometer, and the roughness of the convex surface (the upper end of the surrounding edge) of the surrounding edge 5 is more than 0.6 micrometer; the material of the movable ring 1 and the stationary ring 2 is preferably any one of plastic, ceramic, graphite and metal alloy.
The during operation, liquid is in the homonymy with enclosing along 5, when two sealing rings rotate relatively, enclose along 5 liquid relative motion around the adhesion drive through self and liquid and take place the turbulent flow at the protrusion inclined plane that encloses along 5, because the density of most non-liquid particles is greater than the density of liquid, non-liquid impurity is discharged or keeps away from above-mentioned seal end face along the inclined plane under centrifugal force, avoid impurity to pile up in the contact department of sealing ring contact surface and medium, shelter from to large granule solid impurity in the liquid simultaneously, prevent effectively that non-liquid material from getting into the sealed anchor ring of damage friction, enclose along 5 ring body intensity that has improved the sealing ring, the ring body heat radiating area has been enlarged, sealed face friction heating deflection has been reduced, promote liquid seal effect and increase of service life.
Example two:
as shown in fig. 4: the difference between this embodiment and the first embodiment is: in the embodiment, the liquid is arranged on the inner side of the contact surface of the moving ring 1 and the static ring 2, the surrounding edge 5 protrudes on the inner side of the moving ring sealing end surface 8, the protruding forward inclination angle (a in figure 4) is more than 10 degrees, the second inclined connecting line 52 between the inclined part and the moving ring sealing end surface 8 is an inclined line, and the cross section of the surrounding edge 5 is trapezoidal.
When the surrounding edge 5 rotates, the surrounding edge 5 drives surrounding liquid to rotate mainly through the adhesive force between the surrounding edge 5 and surrounding liquid, when the non-liquid particle flow is close to the surrounding edge 5, the surrounding edge 5 drives non-liquid particles in the liquid to rotate, when the rotating speed of the non-liquid particles is high, turbulent flow can be formed in the liquid, the non-liquid particles forming the turbulent flow can easily move to the center of the pipeline, the liquid flow rate at the center of the pipeline is relatively high, the non-liquid particles can be accelerated to a certain extent to be away from a friction pair as soon as possible, and the non-liquid particles are prevented from entering the inside of the friction pair. The service life of the mechanical seal of the embodiment is prolonged.
Example three:
as shown in fig. 5: the difference between this embodiment and the first embodiment is: the surrounding edge 5 of the embodiment is connected with the sealing end surface and the outer circumferential surface of the ring in a forward-inclined convex mode, the inclined connecting line III 53 between the inclined part and the vertical line of the sealing surface is an inclined line, the connecting surface with the outer circumferential surface is an arc surface, and the cross section of the surrounding edge 5 is a combination of a cone shape and an arc shape.
Example four:
as shown in fig. 6: the difference from the first embodiment is that: the surrounding edge 5 of the embodiment is connected with the sealing end surface 8 of the movable ring and the outer circumferential surface of the ring in a forward-inclined protruding mode, the four inclined connecting lines 54 between the inclined parts and the vertical lines of the sealing end surface 8 of the movable ring are arc-shaped connecting lines, the connecting surface with the outer circumferential surface is an inclined surface, and the section of the forward-inclined protruding part of the surrounding edge 5 is a combination of a polygon and an arc.
Example five:
as shown in fig. 7: the difference from the first embodiment is that: in the embodiment, the enclosing edge 5 is obliquely and convexly connected with the sealing end surface 8 of the movable ring and the outer circumferential surface of the movable ring 1, and an inclined connecting line five 55 between the inclined part and the vertical line of the sealing end surface 8 of the movable ring is an arc line and an inclined line, and the connecting surface with the outer circumferential surface of the movable ring 1 is a vertical surface. The cross section of the forward-inclined convex part of the surrounding edge 5 is a combination of trapezoid and arc.
The difference between the third embodiment and the fifth embodiment and the first embodiment is that: the diameter of the surrounding edge 5 of the third embodiment to the fifth embodiment is larger than that of the movable ring 1, which determines that the linear velocity of the surrounding edge 5 of the first embodiment is higher and the contact surface with the external liquid is larger under the same angular velocity compared with the first embodiment, so that the driving effect on the external liquid is better, and the effect of removing non-liquid particles is better.
Example six:
as shown in fig. 8: the difference from the first embodiment is that: the surrounding edge 5 of the embodiment protrudes forward and inclines at the outer periphery of the sealing end surface 8 of the movable ring, the inclined connecting line six 56 between the inclined part and the vertical line of the sealing end surface 8 of the movable ring is an arc line, and the cross section of the protruding part of the surrounding edge 5 which inclines forward is an arc.
Example seven:
as shown in fig. 9: the difference from the first embodiment is that: the edge 5 of the embodiment protrudes forward to the outer periphery of the seal end face 8 of the movable ring, the inclined connection part 57 between the inclined part and the vertical line of the seal end face 8 of the movable ring is inclined, the surface roughness of the protruding inclined surface is more than 1 mm, and the cross section of the front protruding part of the edge 5 is a combination of a cone shape and a polygon shape.
The difference between the sixth embodiment and the seventh embodiment and the first embodiment is that: in the sixth embodiment and the seventh embodiment, the inclined connection line six 56 and the inclined connection line seven 57 of the peripheral edge 5 are not straight lines, but are provided with protrusions which are circular arc-shaped or zigzag-shaped, so that the contact area of the peripheral edge 5 and the liquid can be increased, the rotating speed of the liquid can be increased effectively, and the driving effect of the peripheral edge 5 on non-liquid particles can be improved.
Example eight:
as shown in fig. 10 and 11: the difference between this embodiment and the first embodiment is: the embodiment discloses a mechanical seal for liquid with an outer peripheral edge, which is applied and implemented in a cartridge mechanical seal and comprises a movable ring 1 and a fixed ring 2, wherein a spring 7 or a corrugated pipe is arranged along the axial direction of the movable ring 1 or the fixed ring 2, and the sealing end face of the movable ring 1 or the fixed ring 2 is tightly attached and is vertical to a shaft 3; the movable ring 1, the spring 7 or the corrugated pipe are arranged on the shaft sleeve 10 and are fixedly connected with the shaft 3 through the locking ring 11, the static ring 2 and the gland 4 are fixedly connected with the shell 6, the shaft 3 and the shell 6 rotate relatively, and liquid on one side of the sealing end face is isolated from leaking to one side close to the shaft sleeve 3. The width of the section of the movable ring 1 is larger than that of the section of the static ring 2, so that the sealing end face of the movable ring 1 is attached to the sealing end face of the static ring 2; on the liquid side of the sealing surface, the movable ring 1 with larger section width is provided with a surrounding edge 5 with convex radial height, the static ring 2 with narrower section width is close to the liquid side and is parallel to the axis without convex, the surrounding edge 5 inclines forwards to the side of the static ring 2 with narrower section width, and the connection between the forward inclined part and the binding surfaces of the movable ring 1 and the static ring 2 is a right angle; the distance between the connecting point of the surrounding edge 5 and the binding surface and the forward tilting point of the surrounding edge 5 is larger than zero.
The surrounding edge 5 of the moving ring 1 of the embodiment protrudes forward and inclines on the outer periphery of the sealing end surface 8 of the moving ring, a forward inclining part (the inner side of the surrounding edge 5) and the sealing end surface 8 of the moving ring are at right angles, a right-angle connecting line eight 58 is a straight line perpendicular to the sealing end surface 8 of the moving ring, and the section of the surrounding edge 5 is trapezoidal. In addition to the advantages described in the first embodiment, the skirt 5 of the present embodiment can shield the contact position between the contact surface of the sealing ring and the medium from large or heavy particle impurities in the surface liquid, and has a driving effect on the external liquid, so as to exclude light non-liquid particles.
The above-mentioned embodiments are merely preferred embodiments of the present invention with respect to liquid diversity, particle impurity variety and particle impurity content, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The liquid mechanical seal with the peripheral edge comprises a movable ring and a stationary ring, wherein a spring or a corrugated pipe is arranged on the movable ring or the stationary ring along the axial direction, and the elastic force enables the end faces of the movable ring and the stationary ring to be attached and enables the end faces to be perpendicular to the axial direction; one side of the contact surface of the moving ring and the static ring is air, the other side of the contact surface of the moving ring and the static ring is liquid, the moving ring and the static ring are tightly jointed to prevent the liquid from leaking from one side to the other side, and the liquid leakage prevention device is characterized in that the widths of the sections of the moving ring and the static ring are different, so that the end parts of the moving ring and the static ring are jointed; the liquid side of the movable ring and the static ring is provided with a ring edge with larger section width and protruding radial height, the ring with narrower section width is close to the liquid side and is parallel to the axis without protruding, and the ring edge inclines forwards to the ring side with narrower section width.
2. A mechanical liquid seal according to claim 1 having a peripheral edge, wherein said peripheral edge is disposed only outside the interface between the rotating ring and the stationary ring.
3. A mechanical liquid seal according to claim 1 having a peripheral edge, wherein said peripheral edge is disposed only inside the interface between the rotating ring and the stationary ring.
4. The mechanical liquid seal with peripheral edge of claim 1 wherein said rotating ring is of unitary or split construction; the stationary ring is of a monolithic or split structure.
5. The mechanical liquid seal of any one of claims 1 to 4, wherein the connection between the forward inclined portion of the peripheral edge and the abutting surfaces of the movable ring and the stationary ring is an arc inclination, a diagonal inclination or a right angle.
6. A mechanical liquid seal according to any of claims 1 to 3 in which the point of attachment of the skirt to the abutting face intersects the forward point of the skirt or is more than zero distance away from the forward point of the skirt.
7. Mechanical liquid seal with a peripheral edge according to any of claims 1 to 3, characterised in that the slope of the peripheral edge is provided with projections.
8. The mechanical liquid seal with the peripheral edge according to any one of claims 1 to 3, wherein the cross section of the peripheral edge is a cone, a polygon, an arc or any combination of the cone, the polygon and the arc.
9. A mechanical liquid seal with a peripheral edge according to any one of claims 1 to 3, wherein the material of the moving ring and the stationary ring is any one of plastic, ceramic, graphite and metal alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920351903.2U CN209856382U (en) | 2019-03-20 | 2019-03-20 | Mechanical seal for liquids with peripheral edge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920351903.2U CN209856382U (en) | 2019-03-20 | 2019-03-20 | Mechanical seal for liquids with peripheral edge |
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| Publication Number | Publication Date |
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| CN209856382U true CN209856382U (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920351903.2U Active CN209856382U (en) | 2019-03-20 | 2019-03-20 | Mechanical seal for liquids with peripheral edge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973660A (en) * | 2019-03-20 | 2019-07-05 | 艾志（南京）环保管接技术股份有限公司 | Liquid mechanical seal with peripheral edge |
| DE202021106173U1 (en) | 2021-07-13 | 2021-11-22 | Aigi Environmental Inc. | Mechanical sealing device for sealing liquids |
-
2019
- 2019-03-20 CN CN201920351903.2U patent/CN209856382U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973660A (en) * | 2019-03-20 | 2019-07-05 | 艾志（南京）环保管接技术股份有限公司 | Liquid mechanical seal with peripheral edge |
| DE202021106173U1 (en) | 2021-07-13 | 2021-11-22 | Aigi Environmental Inc. | Mechanical sealing device for sealing liquids |
| GB2608873A (en) * | 2021-07-13 | 2023-01-18 | Aigi Env Inc | Mechanical sealing device for sealing liquid |
| GB2608873B (en) * | 2021-07-13 | 2023-10-11 | Aigi Env Inc | Mechanical sealing device for sealing liquid |
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