CN116231380B - Protective assembly of underwater connector - Google Patents
Protective assembly of underwater connector Download PDFInfo
- Publication number
- CN116231380B CN116231380B CN202310520149.1A CN202310520149A CN116231380B CN 116231380 B CN116231380 B CN 116231380B CN 202310520149 A CN202310520149 A CN 202310520149A CN 116231380 B CN116231380 B CN 116231380B
- Authority
- CN
- China
- Prior art keywords
- protective
- box body
- mounting
- mounting plates
- mounting plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 80
- 238000007789 sealing Methods 0.000 claims abstract description 45
- 230000009471 action Effects 0.000 claims abstract description 9
- 210000003739 neck Anatomy 0.000 claims description 15
- 230000000903 blocking effect Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 239000013535 sea water Substances 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000003208 petroleum Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
- H01R13/523—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases for use under water
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/502—Bases; Cases composed of different pieces
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
- H01R13/5202—Sealing means between parts of housing or between housing part and a wall, e.g. sealing rings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/56—Means for preventing chafing or fracture of flexible leads at outlet from coupling part
- H01R13/565—Torsion-relieving
Abstract
The application provides a protective assembly of an underwater connector, which comprises a protective box body, a protective cover and a protective cover, wherein the protective box body is used for accommodating the connector; the two mounting plates are arranged at two ends of the protective box body and can slide along the inner wall of the protective box body, the mounting plates are used for connecting external cables, and the cables on the two mounting plates are connected through connectors in the protective box body; the support column is arranged in the protective box body, two mounting plates are respectively connected to two ends of the support column, the interior of the protective box body is a closed cavity, and the mounting plates can slide along the radial direction of the support column under the action of the internal and external pressure difference of the protective box body. According to the underwater connector protection assembly, the distance between the mounting plates at the two ends can be changed under the action of the internal and external pressure difference, so that the volume of the internal cavity of the protection box is changed, gaps of the protection box caused by unbalanced internal and external pressure of the protection box are prevented, the sealing effect of the protection assembly is ensured, and corrosion of the connector caused by seawater entering the protection box is prevented.
Description
Technical Field
The application relates to the technical field of connectors, in particular to an underwater connector protection assembly.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
With the continuous development of the electric connector, the functions of the petroleum electric connector are continuously perfected, the functions of the petroleum electric connector are particularly complex, the petroleum environment field is that the underwater electric connector has the requirements of air tightness, water tightness and environmental oil pressure/water oil mixture pressure resistance.
The underwater connector is used for connecting cables, and the existing underwater connector is installed in the protective box, so that oil or water in the external environment of the protective box is isolated, and medium oil is filled in the protective box for balancing the internal pressure and the external pressure of the protective box.
However, when the temperature of the underwater environment changes, the internal oil pressure of the protective box changes, but the pressure outside the protective box basically keeps unchanged, so that the internal pressure and the external pressure of the protective box are unbalanced, gaps are easily caused by the pressure, the sealing effect is affected, and the underwater connector is easily corroded after seawater enters the interior of the protective box.
It should be noted that the foregoing description of the background art is only for the purpose of providing a clear and complete description of the technical solution of the present application and is presented for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background of the application section.
Disclosure of Invention
The application aims to solve the technical problem of providing an underwater connector protection assembly which solves the problem of unbalanced pressure inside and outside a protection box. In order to solve the technical problem, a protection component of an underwater connector is used in cooperation with an external cable and the connector, and the protection component comprises: the protection box body is hollow and forms a containing cavity for containing the connector, and two ends of the protection box body are arranged in an opening manner; the two mounting plates are arranged at two ends of the protective box body and slidably arranged on the inner wall of the opening, the mounting plates are used for connecting external cables, and the cables on the two mounting plates are connected through connectors in the accommodating cavity; the support column is arranged in the protective box body, two mounting plates are respectively connected to two ends of the support column, a closed cavity is formed between the inner wall of the protective box body and the two mounting plates, and the mounting plates can axially slide along the support column under the action of internal and external pressure differences of the protective box body to change the volume of the cavity so as to balance the internal and external pressure of the protective box body.
Preferably, the mounting plate on set up the mounting hole that is used for installing the support column, the both ends of support column be the neck that the diameter reduces, the neck insert in the mounting hole, the mounting plate can follow the neck and slide under the effect of the inside and outside pressure differential of protection box, the bottom of neck forms the step face, the step face can play the barrier effect to the internal surface of mounting plate.
Preferably, screws are connected to the two ends of the support column in a threaded manner, the heads of the screws are located on the outer side of the mounting plate, and the heads of the screws play a role in blocking the outer surface of the mounting plate to prevent the mounting plate from being separated from the support column.
Preferably, the protection assembly further comprises a fixing frame for installing the protection box body, the fixing frame comprises check rings respectively sleeved at two ends of the protection box body, one end of each check ring is provided with a flange extending towards the central axis direction of the protection box body, the protection box body is fixed between the two flanges, the edge of each flange exceeds the side wall of the protection box body, the mounting plates are blocked, and the two mounting plates are limited between the two flanges.
Preferably, the inner wall of the protective box body is also provided with two convex rings, the two convex rings are respectively arranged at two ends of the protective box body and positioned between the two mounting plates, and the convex rings can play a limiting role on the mounting plates.
Preferably, the number of the support columns is one, the protective box body is of a cylindrical structure, the mounting plate is of a circular structure, the support columns are arranged on the central shaft of the protective box body, and the mounting plate can rotate around the support columns.
Preferably, the number of the support columns is at least two.
Preferably, the protective box body is filled with medium oil, the mounting plate is provided with an oil filling hole and an oil outlet, the oil filling hole and the oil outlet are sealed through an oil blocking plug, and the oil pressure in the protective box body is greater than the external environment pressure.
Preferably, the side wall of screw set up annular seal groove one along circumference, seal groove one in install sealing washer one, the screw pass through sealing washer one and the inner wall of mounting hole is sealed, the neck of support column set up annular seal groove two along circumference, seal groove two in install sealing washer two, the side wall of support column pass through sealing washer two and the inner wall of mounting hole is sealed, sealing washer one and sealing washer two form double-deck sealing washer.
Preferably, the side wall of the mounting plate is provided with a third sealing groove along the circumferential direction, a third sealing ring is arranged in the third sealing groove, and the mounting plate is sealed with the side wall of the protective box body through the third sealing ring.
By the technical scheme, the application has the following beneficial effects:
according to the underwater connector protection assembly, under the action of internal and external pressure differences, the mounting plates at the two ends of the protection box can have certain displacement in the axial direction, and the distance between the mounting plates at the two ends can be changed, so that the volume of the internal cavity of the protection box is changed, the internal and external pressure of the protection box is balanced, the gap of the protection box caused by unbalanced internal and external pressure of the protection box is prevented, the sealing effect of the protection assembly is ensured, and the corrosion of the connector caused by seawater entering the interior of the protection box is prevented. The support post can define a minimum distance between the two mounting plates to prevent overcompression from causing wire entanglement within the protective enclosure. When the quantity of support column is one, the mounting panel can rotate relative to the support column, can alleviate the distortion phenomenon of cable effectively to the protection outside cable is prevented from damaging. When the number of the support columns is plural, the two mounting plates cannot rotate relatively, so that the wires of the connector inside can be protected from twisting.
Drawings
Fig. 1 is a schematic view of the structure of the underwater connector shield assembly of the present application.
Fig. 2 is a schematic structural view of the underwater connector shield assembly of the present application.
Fig. 3 is a schematic view of the cross-sectional structure of fig. 2 in the A-A direction.
Fig. 4 is a partial enlarged view of a portion B in fig. 3.
Fig. 5 is a partial enlarged view of a portion C in fig. 3.
Fig. 6 is a schematic structural view of an underwater connector shield assembly according to another embodiment of the present application.
Fig. 7 is a partial enlarged view of a portion D in fig. 6.
Wherein: 1. a protective box body; 2. a mounting plate; 3. a fixing frame; 4. a support column; 5. a first cable; 6. oil filler/outlet holes; 7. a connector; 8. a second cable; 9. a first sealing ring; 10. a second sealing ring; 41. a screw; 11. a convex ring; 13. a third sealing ring; 31. and (5) a flange.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that, in the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and to distinguish between similar objects, and there is no order of preference between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
As shown in fig. 1 to 3, the underwater connector protection assembly of the present application comprises a protection box 1 for accommodating a connector 7; the two mounting plates 2 are respectively arranged at two ends of the protective box body 1, the mounting plates 2 are used for mounting cables, and the cables on the two mounting plates 2 are connected through a connector 7 in the protective box body 1; the support column is located in the protection box 1, two mounting panel 2 connect in the both ends of support column respectively, the inside inclosed cavity that is of protection box 1, mounting panel 2 can follow support column axial slip under the effect of the inside and outside pressure differential of protection box 1.
The protective box body 1 is filled with medium oil, the mounting plate 2 is provided with an oil filling hole 6 and an oil outlet 6, and the oil filling hole and the oil outlet can be sealed by an oil blocking plug. When the oil is injected into the protective box body 1, the oil pressure in the protective box body 1 is ensured to be larger than the pressure of the external environment, a certain pressure difference is presented, and the pressure difference is usually smaller than 0.5MPa. When the protective box body 1 is placed in water, the high pressure in the box body can prevent external water from penetrating into or entering the box body, and under the deep water condition, the external water pressure extrudes the sliding block, so that the sliding block moves inwards, and the inner pressure can control the moving distance of the mounting plate 2.
The side wall of mounting panel 2 be provided with the seal groove III along circumference, the seal groove III in install sealing washer III 13, mounting panel 2 pass through sealing washer III 13 and seal with the side wall of protective housing 1.
As shown in fig. 4, in an embodiment of the present application, the mounting plate 2 is provided with a mounting hole for mounting a support column, two ends of the support column 4 are necks with reduced diameters, the necks are inserted into the mounting hole, the necks are provided with a second annular sealing groove along the circumferential direction, a second sealing ring 10 is installed in the second sealing groove, and the side wall of the support column is sealed with the inner wall of the mounting hole through the second sealing ring 10. The mounting plate 2 can slide along the neck under the action of the internal and external pressure difference of the protective box body 1.
The bottom of neck forms the step face, the step face can play the effect of blockking up the internal surface of mounting panel 2, limit the minimum limit distance between two mounting panels 2 of in-process that two mounting panels 2 removed, make the space between two mounting panels 2 can not excessively compress, prevent the intertwine of the underwater connector 7 circuit that causes because of excessively compressing.
The two ends of the support column are provided with screws 41, and the screws 41 are in threaded connection with the end parts of the support column 4. The side wall of the screw 41 is provided with a first annular sealing groove along the circumferential direction, a first sealing ring 9 is arranged in the first sealing groove, the screw 41 is sealed with the inner wall of the mounting hole through the first sealing ring 9, and the first sealing ring 9 and the second sealing ring 10 form a double-layer sealing ring. The head of the screw 41 is located outside the mounting plates 2, and can play a role in blocking the outer surfaces of the mounting plates 2, preventing the mounting plates 2 from excessively moving outwards to separate from the support columns, and limiting the maximum distance between the two mounting plates 2.
The mounting plates 2 are limited between the heads of the screws 41 and the step surfaces of the support columns 4, the mounting plates 2 at the two ends of the protective box can have certain displacement in the axial direction under the action of internal and external pressure difference, and the distance between the mounting plates 2 at the two ends can be changed, so that the volume of the cavity inside the protective box is changed, and the internal and external pressure of the protective box is regulated.
The protection assembly further comprises a fixing frame 3, the protection box body 1 is installed on the fixing frame 3, and the fixing frame 3 is fixed on other equipment through fastening screws 41. The fixing frame 3 comprises retaining rings respectively sleeved at two ends of the protective box body 1, one end of each retaining ring is provided with a retaining edge 31 extending towards the central axis direction of the protective box body 1, the protective box body 1 is fixed between the two retaining edges 31, the edge of each retaining edge 31 exceeds the side wall of the protective box body 1, the retaining plates 2 are blocked, the two mounting plates 2 are limited between the two retaining edges 31, and the mounting plates 2 are prevented from being separated from the protective box body 1.
As shown in fig. 6 and 7, the inner wall of the protective housing 1 is further provided with two convex rings 11, the two convex rings 11 are respectively arranged at two ends of the protective housing 1, the two mounting plates 2 are respectively arranged at the outer sides of the two convex rings 11, when the mounting plates 2 move in the protective housing under the action of internal and external pressure, the convex rings 11 can block the mounting plates 2, play a limiting role on the mounting plates 2, and prevent the mounting plates 2 from being separated from the protective housing 1.
In one embodiment, the number of the support columns is one, the protection box body 1 is of a cylindrical structure, the mounting plate 2 is of a circular structure, the support columns are located on the central shaft of the protection box body 1, the mounting plate 2 can rotate around the support columns, the mounting plates 2 at two ends can rotate relatively, when a cable is twisted, the cable can drive the mounting plates 2 to rotate around the support columns, and the twisting phenomenon of the cable can be effectively relieved through the rotating motion, so that the external cable is protected from being damaged.
In another embodiment, the number of support columns is at least two, the mounting plates 2 can only move axially relative to the support columns, and the two mounting plates 2 cannot rotate relatively, so that wires of the connector 7 inside can be protected from being twisted. In practical applications, the number of support columns may be selected as desired.
The above-described embodiments are merely preferred embodiments for fully explaining the present application, and the scope of the present application is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present application, and are intended to be within the scope of the present application. The protection scope of the application is subject to the claims.
Claims (7)
1. A protective assembly for an underwater connector for use with an external cable and connector, the protective assembly comprising:
the protection box body is hollow and forms a containing cavity for containing the connector, and two ends of the protection box body are arranged in an opening manner;
the two mounting plates are arranged at two ends of the protective box body and slidably arranged on the inner wall of the opening, the mounting plates are used for connecting external cables, and the cables on the two mounting plates are connected through connectors in the accommodating cavity;
the support column is arranged in the protective box body, the two mounting plates are respectively connected with the two ends of the support column,
a sealed cavity is formed between the inner wall of the protective box body and the two mounting plates, the mounting plates can slide along the axial direction of the support column under the action of the internal and external pressure difference of the protective box body to change the volume of the cavity so as to balance the internal and external pressure of the protective box body,
the mounting plate is provided with mounting holes for mounting the support columns, the two ends of the support columns are necks with reduced diameters, the necks are inserted into the mounting holes, the mounting plate can slide along the necks under the action of internal and external pressure differences of the protective box body, the bottoms of the necks form step surfaces, the step surfaces can play a blocking role on the inner surfaces of the mounting plate,
screws are connected with the two ends of the support column in a threaded manner, the heads of the screws are positioned at the outer side of the mounting plate, the heads of the screws play a role in blocking the outer surface of the mounting plate to prevent the mounting plate from being separated from the support column,
the protective box body is filled with medium oil, the mounting plate is provided with an oil filling hole and an oil outlet, and the oil filling hole and the oil outlet are sealed through an oil blocking plug.
2. The protective assembly of claim 1, further comprising a fixing frame for mounting the protective case, wherein the fixing frame comprises retaining rings respectively sleeved at two ends of the protective case, one end of each retaining ring is provided with a retaining edge extending towards the central axis direction of the protective case, the protective case is fixed between the two retaining edges, the edge of each retaining edge exceeds the side wall of the protective case, the retaining edges block the mounting plates, and the two mounting plates are limited between the two retaining edges.
3. The protective assembly according to claim 1, wherein the inner wall of the protective housing is further provided with two convex rings, the two convex rings are respectively arranged at two ends of the protective housing and between the two mounting plates, and the convex rings can limit the mounting plates.
4. The protective assembly of claim 1, wherein the number of support columns is one, the protective housing is of a cylindrical structure, the mounting plate is of a circular structure, the support columns are arranged on a central shaft of the protective housing, and the mounting plate can rotate around the support columns.
5. The protective assembly of claim 1 wherein the number of support columns is at least two.
6. The protective assembly according to claim 1, wherein the side wall of the screw is provided with a first annular sealing groove along the circumferential direction, the first sealing groove is internally provided with a first sealing ring, the screw is sealed with the inner wall of the mounting hole through the first sealing ring, the neck of the support column is provided with a second annular sealing groove along the circumferential direction, the second sealing groove is internally provided with a second sealing ring, the side wall of the support column is sealed with the inner wall of the mounting hole through the second sealing ring, and the first sealing ring and the second sealing ring form a double-layer sealing ring.
7. The protective assembly according to claim 1, wherein a third sealing groove is formed in the side wall of the mounting plate along the circumferential direction, a third sealing ring is arranged in the third sealing groove, and the mounting plate is sealed with the side wall of the protective box body through the third sealing ring.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310855667.9A CN116895974A (en) | 2023-05-10 | 2023-05-10 | Protective assembly of underwater connector |
| CN202310520149.1A CN116231380B (en) | 2023-05-10 | 2023-05-10 | Protective assembly of underwater connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310520149.1A CN116231380B (en) | 2023-05-10 | 2023-05-10 | Protective assembly of underwater connector |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310855667.9A Division CN116895974A (en) | 2023-05-10 | 2023-05-10 | Protective assembly of underwater connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116231380A CN116231380A (en) | 2023-06-06 |
| CN116231380B true CN116231380B (en) | 2023-08-15 |
Family
ID=86570061
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310855667.9A Pending CN116895974A (en) | 2023-05-10 | 2023-05-10 | Protective assembly of underwater connector |
| CN202310520149.1A Active CN116231380B (en) | 2023-05-10 | 2023-05-10 | Protective assembly of underwater connector |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310855667.9A Pending CN116895974A (en) | 2023-05-10 | 2023-05-10 | Protective assembly of underwater connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN116895974A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107732538A (en) * | 2017-09-30 | 2018-02-23 | 沈阳兴华航空电器有限责任公司 | Can load-bearing water-tight electrical connector |
| CN109449669A (en) * | 2018-12-10 | 2019-03-08 | 美钻深海能源科技研发（上海）有限公司 | Underwater wet slotting static pressure compensation device |
| CN111817074A (en) * | 2020-07-29 | 2020-10-23 | 中交第一航务工程局有限公司 | Underwater cable connector |
| CN112600029A (en) * | 2020-12-07 | 2021-04-02 | 浙江大学 | Underwater wet-pull-plug pressure balance electric connector |
| CN214171017U (en) * | 2020-12-31 | 2021-09-10 | 中船重工中南装备有限责任公司 | Pressure compensator for relieving internal and external pressure |
| CN216735747U (en) * | 2021-12-02 | 2022-06-14 | 温州威力助剂有限公司 | Raw materials storage tank with protective structure |
-
2023
- 2023-05-10 CN CN202310855667.9A patent/CN116895974A/en active Pending
- 2023-05-10 CN CN202310520149.1A patent/CN116231380B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107732538A (en) * | 2017-09-30 | 2018-02-23 | 沈阳兴华航空电器有限责任公司 | Can load-bearing water-tight electrical connector |
| CN109449669A (en) * | 2018-12-10 | 2019-03-08 | 美钻深海能源科技研发（上海）有限公司 | Underwater wet slotting static pressure compensation device |
| CN111817074A (en) * | 2020-07-29 | 2020-10-23 | 中交第一航务工程局有限公司 | Underwater cable connector |
| CN112600029A (en) * | 2020-12-07 | 2021-04-02 | 浙江大学 | Underwater wet-pull-plug pressure balance electric connector |
| CN214171017U (en) * | 2020-12-31 | 2021-09-10 | 中船重工中南装备有限责任公司 | Pressure compensator for relieving internal and external pressure |
| CN216735747U (en) * | 2021-12-02 | 2022-06-14 | 温州威力助剂有限公司 | Raw materials storage tank with protective structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116231380A (en) | 2023-06-06 |
| CN116895974A (en) | 2023-10-17 |
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