CN216110872U - Integrated mechanical sealing structure with shunt bush on double end faces - Google Patents
Integrated mechanical sealing structure with shunt bush on double end faces Download PDFInfo
- Publication number
- CN216110872U CN216110872U CN202122311143.2U CN202122311143U CN216110872U CN 216110872 U CN216110872 U CN 216110872U CN 202122311143 U CN202122311143 U CN 202122311143U CN 216110872 U CN216110872 U CN 216110872U
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- ring
- sealing
- shaft sleeve
- bush
- cavity
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- 238000007789 sealing Methods 0.000 title claims abstract description 120
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims description 19
- 230000003068 static effect Effects 0.000 claims description 17
- 210000004907 gland Anatomy 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000004140 cleaning Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 5
- 239000010865 sewage Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Mechanical Sealing (AREA)
Abstract
The utility model provides a cartridge mechanical sealing structure with a shunting bush on the double end faces, belonging to the technical field of mechanical sealing and comprising: a sealing disc provided with a water inlet and a water outlet; a bushing disposed within the sealing disk; a first seal assembly disposed between the seal disk and the shaft sleeve, the first seal assembly having a first cavity between the first seal assembly and the shaft sleeve; a second seal assembly disposed between the seal disk and the shaft sleeve, the second seal assembly having a second cavity between the second seal assembly and the shaft sleeve; the reposition of redundant personnel bush, its setting is in sealed dish with between the axle sleeve, first cavity with the second cavity passes through reposition of redundant personnel bush intercommunication. The utility model has the beneficial effects that: the shunting bush is additionally arranged, the inside of the mechanical sealing structure is cleaned in sequence, and the cleaning effect is better.
Description
Technical Field
The utility model belongs to the technical field of mechanical sealing, and relates to a cartridge type mechanical sealing structure with a shunt bush on two end faces.
Background
The mechanical seal is a device for preventing fluid leakage, which is formed by at least one pair of end faces perpendicular to the rotation axis, and the end faces are kept in fit and relatively slide under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal.
The Chinese utility model with application number 202020884972.2 discloses a double-end mechanical seal for a double-screw expander, which comprises a shaft sleeve sleeved outside a rotating shaft, wherein a sealing shell is sleeved outside the shaft sleeve, a mounting boss extending along the radial direction is arranged at one end of the sealing shell, which is close to a medium, and a main sealing assembly is arranged between one end of the shaft sleeve, which is close to the mounting boss, and the mounting boss; the other end of the sealing shell is provided with a gland in a sealing and detachable way, and an auxiliary sealing component is assembled between the other end of the shaft sleeve and the gland; the driving ring is sleeved outside one end, close to the gland, of the shaft sleeve and is in driving connection with the shaft sleeve, and therefore integral pre-installation of the shaft sleeve, the sealing shell, the gland, the main sealing assembly and the auxiliary sealing assembly is achieved. The sealing device is characterized in that a sealing cavity is formed among the main sealing assembly, the auxiliary sealing assembly and the sealing shell, two annular grooves are axially arranged on the sealing shell at intervals, and a plurality of flushing holes communicated with the sealing cavity are circumferentially arranged in the annular grooves.
However, the mechanical sealing structure of this structure cannot clean the interior of the structure in sequence, because the leakage inside the mechanical sealing structure generally occurs at the medium end, if the sealing assembly at the medium end, the sealing assembly at the atmosphere section and the sewage are not cleaned in sequence, the cleaning effect is greatly reduced. Therefore, there is a large room for improvement against this problem.
Disclosure of Invention
The utility model aims to provide a cartridge type mechanical sealing structure with a shunting bush on the double end faces, aiming at the problems in the prior art.
The purpose of the utility model can be realized by the following technical scheme: a cartridge-type mechanical seal with a split bush on both end faces, comprising:
a sealing disc provided with a water inlet and a water outlet;
a bushing disposed within the sealing disk;
the first sealing assembly is arranged between the sealing disc and the shaft sleeve, a first cavity is arranged between the first sealing assembly and the shaft sleeve, the water inlet is communicated with the first cavity, the first sealing assembly comprises a first movable ring and a first static ring, the first movable ring is in linkage connection with the shaft sleeve, the first static ring is in linkage connection with the sealing disc, and the first static ring is in abutting connection with the first movable ring;
the second sealing assembly is arranged between the sealing disc and the shaft sleeve, a second cavity is arranged between the second sealing assembly and the shaft sleeve, the water outlet is communicated with the second cavity, the second sealing assembly comprises a second movable ring and a second static ring, the second movable ring is in linkage connection with the shaft sleeve, the second static ring is in linkage connection with the sealing disc, and the second static ring is in abutting connection with the second movable ring;
the reposition of redundant personnel bush, its setting is in sealed dish with between the axle sleeve, first cavity with the second cavity passes through reposition of redundant personnel bush intercommunication.
Preferably, the clamping spring is arranged on the shaft sleeve and is in interference connection with the first rotating ring so as to limit the axial movement of the first rotating ring.
Preferably, the sealed dish is provided with a plurality of first springs and a plurality of second spring, each first spring be the annular arrange and all with first quiet ring is contradicted and is connected, each the second spring be the annular arrange and all with the quiet ring of second is contradicted and is connected.
Preferably, the shaft sleeve is provided with a first transmission pin and a second transmission pin, the first movable ring is in linkage connection with the shaft sleeve through the first transmission pin, and the second movable ring is in linkage connection with the shaft sleeve through the second transmission pin.
Preferably, the sealing disc is provided with a first stop pin and a second stop pin, the first stationary ring passes through the first stop pin with the sealing disc linkage is connected, the second stationary ring passes through the second stop pin with the sealing disc linkage is connected.
Preferably, the sealing disc is provided with an annular protrusion, the annular protrusion is connected with the shunt bush, and the first stop pin, the second stop pin, the first spring and the second spring are all arranged on the annular protrusion.
Preferably, still include sealed well dish and gland, sealed well dish with sealed dish fixed connection, the gland with sealed well dish fixed connection.
Preferably, sealing rings are arranged between the first movable ring, the second movable ring and the shaft sleeve and between the first static ring, the second static ring and the sealing disc.
Compared with the prior art, the utility model has the beneficial effects that:
1. the inside reposition of redundant personnel bush that has increased of mechanical seal structure when the medium end takes place to leak the problem, can make when wasing earlier the seal assembly of cleaning medium end, first seal assembly promptly, the seal assembly who washs the atmosphere end again, second seal assembly promptly, discharge sewage at last again, realized washing mechanical seal structure's inside in proper order for the cleaning performance is better.
2. The tip cover of axle sleeve is equipped with the tight loop, can play spacing effect to the second rotating ring, provides an axial power for the second rotating ring for second seal assembly's sealed effect is better.
3. The shaft sleeve is provided with the clamp spring, the clamp spring is in abutting connection with the first movable ring, axial movement of the first movable ring can be limited, the first movable ring is prevented from being pushed away by media in equipment to cause leakage, and the sealing effect is better.
4. The springs connected with the static rings on the two sealing components are arranged in an annular mode, so that the stress is more uniform, and the sealing effect is better.
Drawings
Fig. 1 is a schematic view of a cartridge type mechanical seal structure with a split bush on both end faces of the utility model.
Fig. 2 is an enlarged schematic view of a portion a of fig. 1.
Fig. 3 is an enlarged schematic view of a portion B of fig. 1.
In the figure, 100, a shaft sleeve; 200. a gland; 300. sealing the middle disc; 110. a first seal assembly; 111. a first rotating ring; 112. a first stationary ring; 113. a first spring; 114. a first drive pin; 115. a first stopper pin; 116. a first moving ring seal ring; 117. a first stationary ring seal ring; 120. a second seal assembly; 121. a second rotating ring; 122. a second stationary ring; 123. a second spring; 124. a second drive pin; 125. a second stopper pin; 126. a second moving ring seal ring; 127. a second stationary ring seal ring; 130. a first cavity; 140. a second cavity; 150. sealing the disc; 151. an annular boss; 152. a water inlet; 153. a water outlet; 160. a shunt liner; 170. and a clamp spring.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1, 2 and 3, a cartridge type mechanical seal structure with a split bush on both end faces includes: a sealing disc 150 and a shaft sleeve 100, wherein the sealing disc 150 is provided with a water inlet 152 and a water outlet 153; the shaft sleeve 100 is located within the seal disk 150 and fits over the drive shaft.
Preferably, the shaft sleeve 100 is sleeved on the transmission shaft and is in linkage connection with the transmission shaft, the sealing disc 150 is sleeved outside the shaft sleeve 100, and during cleaning, cleaning liquid can flow into the mechanical sealing structure from the water inlet 152 and flow out from the water outlet 153.
The first sealing assembly 110 is disposed between the sealing disc 150 and the shaft sleeve 100, a first cavity 130 is disposed between the first sealing assembly 110 and the shaft sleeve 100, the water inlet 152 is communicated with the first cavity 130, and the first sealing assembly 110 includes a first moving ring 111 and a first stationary ring 112.
Preferably, the sealing disc 150 is sleeved on the first stationary ring 112 and a sealing ring is arranged between the first stationary ring 112 and the first stationary ring 112, the first movable ring 111, the first stationary ring 112 and the shaft sleeve 100 are enclosed together to form the first cavity 130, a water inlet 152 arranged on the sealing disc 150 is communicated with the first cavity 130, and the cleaning solution can enter the first cavity 130 from the water inlet 152.
First rotating ring 111 with axle sleeve 100 linkage connection, first quiet ring 112 with sealed dish 150 linkage connection, first quiet ring 112 with first rotating ring 111 contradicts to be connected.
During operation, first rotating ring 111 can rotate along with the rotation of axle sleeve 100, and first quiet ring 112 can not take place to rotate, consequently produces relative rotation between first rotating ring 111 and the first quiet ring 112, thereby an terminal surface of first quiet ring 112 is contradicted with an terminal surface of first rotating ring 111 and is connected and form the conflict face simultaneously, and this conflict face ensures that can not take place to leak between first rotating ring 111 and the first quiet ring 112.
The second sealing assembly 120 is disposed between the sealing disc 150 and the shaft sleeve 100, a second cavity 140 is disposed between the second sealing assembly 120 and the shaft sleeve 100, the water outlet 153 is communicated with the second cavity 140, and the second sealing assembly 120 includes a second moving ring 121 and a second stationary ring 122.
Preferably, the sealing disc 150 is sleeved on the second stationary ring 122 and a sealing ring is arranged between the second stationary ring 122 and the second stationary ring 121, the second stationary ring 122 and the shaft sleeve 100 are enclosed together to form a second cavity 140, a water outlet 153 arranged on the sealing disc 150 is communicated with the second cavity 140, and the cleaning liquid in the second cavity 140 can be discharged from the water outlet 153.
The second rotating ring 121 is in linkage connection with the shaft sleeve 100, the second stationary ring 122 is in linkage connection with the sealing disc 150, and the second stationary ring 122 is in interference connection with the second rotating ring 121.
During operation, the second rotating ring 121 can rotate along with the rotation of the shaft sleeve 100, and the second stationary ring 122 can not rotate, so that the second rotating ring 121 and the second stationary ring 122 can rotate relatively, and meanwhile, one end surface of the second stationary ring 122 is in interference connection with one end surface of the second rotating ring 121 to form an interference surface, and the interference surface ensures that no leakage occurs between the second rotating ring 121 and the second stationary ring 122.
A flow dividing bushing 160 disposed between the sealing plate 150 and the shaft sleeve 100, wherein the first cavity 130 and the second cavity 140 are communicated through the flow dividing bushing 160.
Preferably, the shunt bush 160 is provided as a tubular structure, which is sleeved on the shaft sleeve 100, an outer cylindrical surface of the shunt bush 160 is connected with the sealing disc 150 so as to divide the mechanical seal internal structure into a first cavity 130 close to the medium end and a second cavity 140 close to the atmosphere end, the shunt bush 160 is provided with a flow-through cavity along the axial direction, which can enable the first cavity 130 to communicate with the second cavity 140, one end of the shunt bush 160 is communicated with the first cavity 130, and the other end is communicated with the second cavity 140.
Specifically, during cleaning, the cleaning liquid firstly enters the first cavity 130 from the water inlet 152 of the sealing disc 150, at this time, the first cavity 130 is cleaned, then the cleaning liquid enters the second cavity 140 through the flow dividing bushing 160, at this time, the second cavity 140 is cleaned, and finally, the cleaned sewage is discharged from the water outlet 153. Therefore, the inside of the mechanical sealing structure is cleaned in sequence, and the cleaning effect is greatly improved.
It should be noted that, during operation, the first rotating ring 111 and the first stationary ring 112 and the second rotating ring 121 and the second stationary ring 122 rotate relatively all the time, a large amount of heat is generated, and the cleaning liquid entering the first cavity 130 and the second cavity 140 can also perform a cooling function, thereby preventing overheating damage.
As shown in fig. 1 and 2, on the basis of the above embodiment, the axial movement of the first rotating ring 111 is limited by further including a snap spring 170, wherein the snap spring 170 is fixedly disposed on the shaft sleeve 100 and is in interference connection with the first rotating ring 111.
In actual operation, the medium at the medium end may push the first movable ring 111 to move to the right as shown in fig. 1, so that a leakage phenomenon occurs. When the shaft sleeve 100 works, axial movement cannot occur, so that the clamp spring 170 fixedly arranged on the shaft sleeve 100 cannot axially move, and the clamp spring 170 is in interference connection with the first movable ring 111, so that the axial movement of the first movable ring 111 is limited, the first movable ring 111 is prevented from being pushed away by a medium to cause leakage, and the sealing performance is better.
As shown in fig. 1, 2 and 3, on the basis of the above embodiment, the sealing plate 150 is provided with a plurality of first springs 113 and a plurality of second springs 123, each of the first springs 113 is arranged in a ring shape and is in interference connection with the first stationary ring 112, and each of the second springs 123 is arranged in a ring shape and is in interference connection with the second stationary ring 122.
In practice, one end of the first spring 113 is fixed on the sealing plate 150, the other end is in interference connection with the first stationary ring 112, and the one end is movable, and the first spring 113 is in a compressed state during operation, that is, the first spring 113 applies an axial force to the first stationary ring 112 to the left as shown in fig. 1, so that the first stationary ring 112 is pressed against the first movable ring 111, thereby achieving a better sealing effect. Similarly, the second spring 123 applies an axial force to the second stationary ring 122, such as the force applied to the second stationary ring 122 in the rightward direction in fig. 3, so that the second stationary ring 122 is pressed against the second movable ring 121, thereby achieving a better sealing effect.
It should be pointed out that this mechanical seal structure has adopted a plurality of first spring 113 and a plurality of second spring 123 and all is the annular and arranges on sealed dish, sets up like this and can make the atress of first quiet ring 112 and second quiet ring 122 more even to make the sealed effect between rotating ring and the quiet ring better.
As shown in fig. 1, 2 and 3, in addition to the above embodiment, the bushing 100 is provided with a first transmission pin 114 and a second transmission pin 124, the first rotating ring 111 is linked to the bushing 100 by the first transmission pin 114, and the second rotating ring 121 is linked to the bushing 100 by the second transmission pin 124.
Preferably, one end of the first transmission pin 114 is fixed on the shaft sleeve 100, and since the shaft sleeve 100 rotates along with the transmission shaft during operation, the first transmission pin 114 fixed on the shaft sleeve 100 also rotates along with the shaft sleeve 100, and the other end of the first transmission pin 114 is connected with the first rotating ring 111, so that the rotation of the first transmission pin 114 drives the first rotating ring 111 to rotate. Similarly, the second driving pin 124 can also drive the second rotating ring 121 to rotate by the rotation of the sleeve 100.
As shown in fig. 1 and 2, on the basis of the above embodiment, the sealing plate 150 is provided with a first stop pin 115 and a second stop pin 125, the first stationary ring 112 is coupled with the sealing plate 150 through the first stop pin 115, and the second stationary ring 122 is coupled with the sealing plate 150 through the second stop pin 125.
In operation, since the gland plate 150 is stationary and does not rotate with the drive shaft, the first stop pin 115 disposed on the gland plate 150 is also stationary, and since the first stationary ring 112 is coupled to the first stop pin 115, the first stop pin 115 can limit the rotation of the first stationary ring 112. Similarly, the second stop pin 125 can also limit rotation of the second stationary ring 122 by the stationary seal disk 150.
As shown in fig. 1 and 2, based on the above embodiment, the sealing disk 150 is provided with an annular protrusion 151, the annular protrusion 151 is connected to the shunt bush 160, and the first stopper pin 115, the second stopper pin 125, the first spring 113, and the second spring 123 are all disposed on the annular protrusion 151. Notably, the annular protrusion 151 is coupled to the flow divider sleeve 160 to divide the mechanical seal internal cavity into the first cavity 130 and the second cavity 140.
Preferably, the sealing device further comprises a sealing middle disc 300 and a gland 200, wherein the sealing middle disc 300 is fixedly connected with the sealing disc 150 through screws, and the gland 200 is fixedly connected with the sealing middle disc 300 through screws.
Preferably, a first moving ring seal 116 and a second moving ring seal 126 are respectively disposed between the first moving ring 111 and the second moving ring 121 and the shaft sleeve 100, and a first stationary ring seal 117 and a second stationary ring seal 127 are respectively disposed between the first stationary ring 112 and the sealing plate 150 and between the second stationary ring 122 and the sealing plate 150.
The first movable ring sealing ring 116 can ensure the sealing performance between the first movable ring 111 and the shaft sleeve 100, the second movable ring sealing ring 126 can ensure the sealing performance between the second movable ring 121 and the shaft sleeve 100, the first stationary ring sealing ring 117 can ensure the sealing performance between the first stationary ring 112 and the sealing disc 150, and the second stationary ring sealing ring 127 can ensure the sealing performance between the second stationary ring 122 and the sealing disc 150.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Claims (8)
1. The utility model provides a bi-polar face area reposition of redundant personnel bush's collection dress formula mechanical seal structure which characterized in that includes:
a sealing disc provided with a water inlet and a water outlet;
a bushing disposed within the sealing disk;
the first sealing assembly is arranged between the sealing disc and the shaft sleeve, a first cavity is arranged between the first sealing assembly and the shaft sleeve, the water inlet is communicated with the first cavity, the first sealing assembly comprises a first movable ring and a first static ring, the first movable ring is in linkage connection with the shaft sleeve, the first static ring is in linkage connection with the sealing disc, and the first static ring is in abutting connection with the first movable ring;
the second sealing assembly is arranged between the sealing disc and the shaft sleeve, a second cavity is arranged between the second sealing assembly and the shaft sleeve, the water outlet is communicated with the second cavity, the second sealing assembly comprises a second movable ring and a second static ring, the second movable ring is in linkage connection with the shaft sleeve, the second static ring is in linkage connection with the sealing disc, and the second static ring is in abutting connection with the second movable ring;
the reposition of redundant personnel bush, its setting is in sealed dish with between the axle sleeve, first cavity with the second cavity passes through reposition of redundant personnel bush intercommunication.
2. The integrated mechanical seal of claim 1, wherein the split bush is disposed on both ends of the cartridge, and wherein: still include the jump ring, the jump ring sets up on the axle sleeve and with the first rotating ring is contradicted and is connected thereby the restriction first rotating ring axial displacement.
3. The integrated mechanical seal of claim 1, wherein the split bush is disposed on both ends of the cartridge, and wherein: the sealed dish is provided with a plurality of first springs and a plurality of second spring, each first spring be the annular arrange and all with first quiet ring is contradicted and is connected, each the second spring be the annular arrange and all with the quiet ring of second is contradicted and is connected.
4. A containerized mechanical seal having a split flow sleeve on both ends according to claim 3, wherein: the shaft sleeve is provided with a first transmission pin and a second transmission pin, the first movable ring is connected with the shaft sleeve in a linkage mode through the first transmission pin, and the second movable ring is connected with the shaft sleeve in a linkage mode through the second transmission pin.
5. The integrated mechanical seal of claim 4, wherein the split bush is attached to the two end faces of the cartridge, and wherein: the sealing disc is provided with a first stop pin and a second stop pin, the first stationary ring passes through the first stop pin with the sealing disc linkage is connected, the second stationary ring passes through the second stop pin with the sealing disc linkage is connected.
6. The integrated mechanical seal of claim 5, wherein the split bush is attached to the two end faces of the cartridge, and wherein: the sealing disc is provided with an annular bulge, the annular bulge is connected with the shunt bush, and the first stop pin, the second stop pin, the first spring and the second spring are all arranged on the annular bulge.
7. The integrated mechanical seal of claim 6, wherein the split bush is attached to the two end faces of the cartridge, and wherein: still including sealed center and gland, sealed center with sealed dish fixed connection, the gland with sealed center fixed connection.
8. The integrated mechanical seal of claim 1, wherein the split bush is disposed on both ends of the cartridge, and wherein: the first movable ring, the second movable ring and the shaft sleeve and the first static ring and the second static ring and the sealing disc are provided with sealing rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122311143.2U CN216110872U (en) | 2021-09-23 | 2021-09-23 | Integrated mechanical sealing structure with shunt bush on double end faces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122311143.2U CN216110872U (en) | 2021-09-23 | 2021-09-23 | Integrated mechanical sealing structure with shunt bush on double end faces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216110872U true CN216110872U (en) | 2022-03-22 |
Family
ID=80688133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122311143.2U Active CN216110872U (en) | 2021-09-23 | 2021-09-23 | Integrated mechanical sealing structure with shunt bush on double end faces |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216110872U (en) |
-
2021
- 2021-09-23 CN CN202122311143.2U patent/CN216110872U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Ningbo Chuangwei Machinery Co.,Ltd. Assignor: NINGBO DONGLIAN MECHANICAL SEAL Co.,Ltd. Contract record no.: X2023980053451 Denomination of utility model: A containerized mechanical seal structure with dual end face and splitter liner Granted publication date: 20220322 License type: Common License Record date: 20231221 |
|
| EE01 | Entry into force of recordation of patent licensing contract |