CN108058786A - It is a kind of can fast opening and closing hatch board - Google Patents
It is a kind of can fast opening and closing hatch board Download PDFInfo
- Publication number
- CN108058786A CN108058786A CN201711362648.3A CN201711362648A CN108058786A CN 108058786 A CN108058786 A CN 108058786A CN 201711362648 A CN201711362648 A CN 201711362648A CN 108058786 A CN108058786 A CN 108058786A
- Authority
- CN
- China
- Prior art keywords
- cover board
- planet carrier
- hatch
- central shaft
- board
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B19/00—Arrangements or adaptations of ports, doors, windows, port-holes, or other openings or covers
- B63B19/12—Hatches; Hatchways
- B63B19/14—Hatch covers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B19/00—Arrangements or adaptations of ports, doors, windows, port-holes, or other openings or covers
- B63B2019/0053—Locking means for ports, doors, windows, covers, or the like, e.g. providing for watertight closure when locked
Abstract
The present invention relates to the headstock gear on naval vessel, it is specifically a kind of can fast opening and closing hatch board.It includes hatch fence, there is cover board on the hatch fence, and the one side of cover board and hatch fence coordinates in hinged.Cover board has centre bore, has sealing device in centre bore, has locking device on the inside of cover board.Its main feature is that locking device includes planet carrier.There are rotatable and intermeshing ring gear, planetary gear and sun gear in planet carrier.There is locking level in planet carrier one side, and one end of locking level is hinged on ring gear, and the other end is connected by guiding mechanism with cover board.There is fore shaft on the inside of hatch fence.Locking device has central shaft, and the central shaft through the sun gear and the two in being fixedly connected, stretch out outside planet carrier by the both ends of central shaft, and there is the blind hole of polygon in the end face that central shaft corresponds to cover board one end, and the other end of central shaft is fixed with main handwheel.The hatch board unlock it is easy to operate, it is necessary to driving force it is small, the job requirements under emergent operating mode can be met.
Description
Technical field
The present invention relates to the headstock gear on naval vessel, it is specifically a kind of can fast opening and closing hatch board.
Background technology
It is well known that hatch board is the common headstock gear used on naval vessel.It can be used for personnel or goods when hatch board is opened
Passing through for object, seals isolation, it can be ensured that personnel or cargo are in warship in cabin when closing available for by the regional area on naval vessel
From the influence of extraneous adverse environmental factors such as wave, wind and rain, salinity etc. during ship navigation.
Chinese invention patent ZL201410083776.4 discloses a kind of deep sea manned submersible hatch board locking device, should
Device includes a shaft for running through cover board, and shaft both ends are respectively and fixedly provided with main handwheel；There is motion thread section in the shaft, be driven
There is draw nut on thread segment, draw nut draws locking level by a set of linkage being connected with cover board.Using in cover board
The main handwheel of side drives shaft rotation, you can the lifting of draw nut is controlled, so as to fulfill the locking between cover board and hatch fence
And it opens.When there is emergent operating mode, can equally shaft be driven to rotate using the main handwheel on the outside of cover board, so as to reach opening lid
The purpose of plate.The device is to utilize screw and nut principle in rotary moving, and passes through the transmission of linkage, to realize cover board
Locking and unlatching.And it is the shift motion for meeting locking end, the action locked or opened every time, screw is required for rotating number
Circle.Meanwhile the transmission efficiency of screw is relatively low, operation every time is required for very big driving force.These factors result in hatch board not
It can quickly open, the job requirements under emergent operating mode can not be met.
The content of the invention
The problem to be solved in the present invention be to provide it is a kind of can fast opening and closing hatch board, the hatch board unlock it is easy to operate,
The driving force needed is small, can meet the job requirements under emergent operating mode.
To solve the above problems, take following technical scheme：
The present invention can the hatch board of fast opening and closing include hatch fence, have cover board, cover board and hatch fence on the hatch fence
One side in hinged cooperation.The cover board has centre bore, has sealing device in centre bore, has locking device on the inside of cover board.Its
Feature is that the locking device includes planet carrier, and the axis of the planet carrier is perpendicular with cover board and the two is in be fixedly connected.It is described
Arranged concentric has ring gear in planet carrier, there is sun gear and the planetary gear of no less than three in ring gear, and planetary gear is distributed on too
Sun wheel and is meshed at periphery with sun gear, and planetary gear is meshed with ring gear, ring gear, sun gear and planetary gear with row
Carrier is rotating.The planet carrier one side be distributed along the circumference with can along the locking level of planet carrier radial expansion, locking level
One end is hinged on ring gear, and the other end is connected by guiding mechanism with cover board.It is distributed along the circumference on the inside of the hatch fence
Fore shaft, under hatch board closed state, the outer end position of fore shaft and the locking level corresponds.The locking device has center
Axis, the central shaft is through the sun gear and the two is in being fixedly connected, and the both ends of central shaft are stretched out outside planet carrier, center
There is the blind hole of polygon in the end face that axis corresponds to cover board one end, and the other end of central shaft is fixed with main handwheel.
Further improvement of the present invention scheme is the guiding mechanism including the guide holder along cover board radial arrangement, guiding
The outer end of seat all extends to side edge thereof and the two is in being fixedly connected, and the inner end of guide holder all extends to cover plate central and integrally connects
It is connected on an axle sleeve, which is sleeved on the central shaft and the two is in be slidably matched.The guide holder is each attached to planet
Frame periphery, planet carrier are in be fixedly connected with cover board by guide holder.The planet carrier was corresponded on the outerplanar of cover board one side along week
To axis pin is evenly equipped with, there is the through hole along cover board radial arrangement on guide holder.The locking level includes connecting rod and locking bar, connecting rod
One end is sleeved on the axis pin, and for the other end of connecting rod with locking bar in hinged cooperation, locking bar both passes through the through hole of corresponding guide holder.
There are the annular convex platform of integrally connected, annular convex platform and planet carrier on that section of central shaft between the axle sleeve and planet carrier
Between that section of central shaft on be cased with compression spring.There are locking slot, the master in the outer surface that the planet carrier corresponds to main handwheel one side
There is self-lock pin on handwheel, when cover board is locked on hatch fence by locking device, the self-lock pin is located in locking slot.
Further improvement of the present invention scheme is that the blind hole of the polygon of the center axial end is regular hexagon.
The further improvement project of the present invention is that the sealing device is relief valve, and relief valve is followed successively by valve from the outside to the core
Cap, thread segment and free-sliding spline section, bonnet is located on the outside of cover board and the outer diameter of bonnet is more than the internal diameter of cover central hole, thread segment
With cover central hole in thread fitting, free-sliding spline section be connected with assistant's wheel and the two in slide axially, circumferentially fixed cooperation, it is secondary
Handwheel is in axial restraint, circumferentially rotates cooperation by wheel seat and cover board.Have on the thread segment of the relief valve longitudinally arranged
Gas pressure relief slot.
Said program is taken, is had the following advantages：
Due to the present invention can fast opening and closing hatch board locking device include planet carrier, axis and the cover board phase of the planet carrier
Vertical and the two is in be fixedly connected；Arranged concentric has ring gear in the planet carrier, there is sun gear and no less than three in ring gear
A planetary gear, planetary gear are distributed on sun gear periphery and are meshed with sun gear, and planetary gear is meshed with ring gear, interior
Gear ring, sun gear and planetary gear are rotating with planet carrier；The planet carrier one side is distributed along the circumference with can be along planet carrier
The locking level of radial expansion, one end of locking level are hinged on ring gear, and the other end is connected by guiding mechanism with cover board；It is described
Fore shaft is distributed along the circumference on the inside of hatch fence, under hatch board closed state, the outer end position one of fore shaft and the locking level
One corresponds to；The locking device has central shaft, and it is in be fixedly connected which, which passes through the sun gear and the two, and the two of central shaft
End is stretched out outside planet carrier, and there is the blind hole of polygon in the end face that central shaft corresponds to cover board one end, and the other end of central shaft is consolidated
Surely there is main handwheel.In use, by main handwheel central shaft and sun gear is driven to rotate, and under the gearing of planetary gear, drive
Dynamic ring gear rotates so that locking level is in corresponding guiding mechanism along the radial expansion of cover board, insertion or disengaging hatch fence
The corresponding lock in inside, so as to fulfill the locking and unlatching of cover board.The hatch board passes through by sun gear, planetary gear, ring gear group
Into planetary gear set mechanism, using gear drive principle, the rotation of main handwheel and central shaft is passed into planet carrier, drives lock
Fixed pole is stretched, to achieve the purpose that cover board locking or open.Planetary gear set structure can amplify rotational angle, be locked meeting
Bar stretches on the premise of stroke, can reduce the turnning circle of main handwheel.Meanwhile the efficiency of Planetary Gear Transmission is higher, it is required
Driving force is also smaller, and sealing device is removed on the outside of cover board, utilizes the spanner being adapted with center axial end blind hole, it is possible to light
Unclamp opening plate.Therefore, which can conveniently be turned on and off, and disclosure satisfy that is quickly opened under emergent operating mode
Damage job requirements.
Further, planet carrier is fixed on lid by the stent of the sun shape formed using axle sleeve and the guide holder of radial arrangement
On the inside of plate, the Telescopic of locking level is not only met, additionally it is possible to increase planet carrier and support fixed stability.On center shaft
Annular convex platform, compression spring are set, and locking slot is set on planet carrier, self-lock pin is set on main handwheel, is in order in cabin
When lid is by closing, self-lock pin is made to be lowered into locking slot in the elastic force driving of compression spring.And during from closing to opening operation, it must
It must pull main handwheel that could be rotated on the inside of cover board.In this way, cause hatch board that can prevent the maloperation of main handwheel
Sealing performance declines.
Further, the blind hole of the polygon of center axial end is arranged to regular hexagon, conventional six can be easy to use
Angle spanner carries out damage operation.
Further, relief valve is set to be not only able to realize in adjusting cabin as sealing device the centre bore of cover board
The function of outer air pressure balance, additionally it is possible to reduce the quantity of crossing cabin part, promote integrally-built leakproofness and stability.
Description of the drawings
Fig. 1 be the present invention can fast opening and closing hatch board structure diagram；
Fig. 2 be in Fig. 1 A-A to view；
Fig. 3 is locking device and the partial sectional perspective view of guide holder cooperation；
Fig. 4 is the enlarged diagram of encircled portion in Fig. 1.
Specific embodiment
The present invention is described in further details below in conjunction with attached drawing.
As shown in Figure 1, Figure 2 and Figure 3, it is of the invention can the hatch board of fast opening and closing include hatch fence 1, the hatch fence
There is cover board 2 on 1, cover board 2 and the one side of hatch fence 1 coordinate in hinged.The cover board 2 has centre bore, has sealing in centre bore
There are locking device in device, the inside of cover board 2.The locking device includes planet carrier 18, axis and 2 phase of cover board of the planet carrier 18
Vertical and the two is in be fixedly connected.Arranged concentric has ring gear 17 in the planet carrier 18, there is 14 He of sun gear in ring gear 17
The planetary gear 13 of no less than three, planetary gear 13 are distributed on 14 periphery of sun gear and are meshed with sun gear 14, planetary gear 13
It is meshed with ring gear 17, ring gear 17, sun gear 14 and planetary gear 13 are rotating with planet carrier 18.The planet
18 one side of frame, which is distributed along the circumference with, to be hinged on ring gear 17 along the locking level of 18 radial expansion of planet carrier, one end of locking level
On, the other end is connected by guiding mechanism with cover board 2.1 inside of hatch fence is distributed along the circumference with fore shaft 12, in hatch board
Under closed state, fore shaft 12 and the outer end position of the locking level correspond.The locking device has central shaft 16, the center
Axis 16 is through the sun gear 14 and the two is in being fixedly connected, and the both ends of central shaft 16 are stretched out outside planet carrier 18, center
There is the blind hole 19 of polygon in the end face that axis 16 corresponds to cover board 2 one end, and the blind hole 19 is regular hexagon in the present embodiment, central shaft 16
The other end be fixed with main handwheel 15.
As shown in figures 1 and 3, the guiding mechanism includes the guide holder 51 along 2 radial arrangement of cover board, guide holder 51
Outer end all extends to 2 edge of cover board and the two is in being fixedly connected, and the inner end of guide holder 51 all extends to 2 center of cover board and integrally connects
It is connected on an axle sleeve 52, which is sleeved on the central shaft 16 and the two is in be slidably matched.The guide holder 51 is solid
18 periphery of planet carrier is scheduled on, planet carrier 18 is in be fixedly connected with cover board 2 by guide holder 51.The planet carrier 18 corresponds to cover board 2
Axis pin 8 is distributed along the circumference on the outerplanar of one side, there is the through hole along 2 radial arrangement of cover board on guide holder 51.The locking
Bar includes connecting rod 9 and locking bar 11, and one end of connecting rod 9 is sleeved on the axis pin 8, and the other end and the locking bar 11 of connecting rod 9 are in hingedly to match somebody with somebody
It closes, locking bar 11 both passes through the through hole of corresponding guide holder 51.
As shown in figure 3, there is the annular convex platform of integrally connected on that section of central shaft 16 between the axle sleeve 52 and planet carrier 18
4, compression spring 3 is cased on that section of central shaft 16 between annular convex platform 4 and planet carrier 18.The planet carrier 18 corresponds to main handwheel 15
There is locking slot 20 in the outer surface of one side, has self-lock pin 21 on the main handwheel 15, when cover board 2 is locked at hatch coaming by locking device
When on column 1, the self-lock pin 21 is located in locking slot 20.In actual use, it can set and be no less than in the outer surface of planet carrier 18
The locking slot 20 of two so that at least one locking slot 20 corresponds to the position that cover board 2 is locked, and at least one locking slot 20
The position that corresponding cover board 2 fully opens.
As shown in Figure 1 and Figure 4, the sealing device is relief valve, and relief valve is followed successively by bonnet 71, thread segment from the outside to the core
72 and free-sliding spline section 73, the outer diameter that bonnet 71 is located at 2 outside of cover board and bonnet 71 is more than the internal diameter of 2 centre bore of cover board, screw thread
For section 72 with 2 centre bore of cover board in thread fitting, it is in slide axially, is circumferential solid that free-sliding spline section 73, which is connected with assistant's wheel 10 and the two,
Fixed cooperation, assistant's wheel 10 are in axial restraint, circumferentially rotate cooperation by wheel seat 6 and cover board 2.On the thread segment 72 of the relief valve
There is longitudinally arranged gas pressure relief slot 74, one end of gas pressure relief slot 74 extends to free-sliding spline section 73, the other end and valve of gas pressure relief slot 74
There is interval between cap 71.Under normal condition, relief valve should be tightened in always on 2 centre bore of cover board, in order to improve relief valve and cover board 2
Sealing performance, can O-ring seal be set between bonnet 71 and cover board 2.
In use, when need close the present invention can fast opening and closing hatch board when, first by cover board 2 and hatch fence 1
It is closed, then main handwheel 15 is pulled to 2 inside of cover board.If there is the locking slot 20 of corresponding 2 open position of cover board on planet carrier 18, this
When main handwheel 15 on self-lock pin 21 depart from the locking slot 20, main handwheel 15 can rotate；If being not provided on planet carrier 18 pair
The locking slot 20 of 2 open position of cover board is answered, then can directly rotate main handwheel 15.The rotation of main handwheel 15 can drive central shaft
16 and sun gear 14 rotate, and under the gearing of planetary gear 13, driving ring gear 17 rotates.The rotation of ring gear 17 can
The connecting rod 9 of locking level is driven to swing, so as to promote the extending radially out along cover board 2 of locking bar 11, insertion hatch fence 1 is corresponding
In lock so that cover board 2 is locked on hatch fence 1.Meanwhile the self-lock pin 21 on main handwheel 15 sinks to corresponding cover board 2 and locks
In the locking slot 20 of tight position, avoid collision or maloperation caused by cover board 2 be not closed completely or open.The normally-open hatch
Lid, as long as above-mentioned action reversed is operated.The relief valve set on cover board 2 in centre bore can be played in all-balanced cover
The effect of outer air pressure.Under normal condition, the thread segment 72 of relief valve should completely be screwed with the centre bore of cover board 2 so that pressure release
Slot 74 is located in centre bore and 2 inside of cover board, bonnet 71 are pressed on 2 outer surface of cover board, packing state are in cabin.It is flat when needing
Weighing apparatus external and internal pressure and when carrying out pressure release, in 2 outside rotation bonnet 71 of cover board so that entire relief valve is screwed out to 2 outside of cover board, is let out
One end of indent 74 is exposed in 2 outside of cover board, and gas pressure relief slot 74 can connect the space inside and outside cover board 2 at this time, play pressure release and put down
The effect of weighing apparatus.
When there is emergent operating mode, it is necessary to when opening the hatch board from outside, the valve of relief valve need to be only rotated in 2 outside of cover board
Cap 71, and relief valve is taken out completely；Die nut is recycled to stretch into the centre bore of cover board 2, and sinks to locking device central shaft
In 16 blind hole 19；Then die nut and central shaft 16 are promoted, the self-lock pin 21 of main handwheel 15 is made to depart from planet carrier 18
Locking slot 20, it is possible to rotary middle spindle 16 so that the outer end of locking level departs from the lock of hatch fence 1, easily by cover board 2
It opens.This damage operation, required driving force is small, easy to operate, efficient.Meanwhile the damage operation does not destroy hatch board
Any parts, after damage operation, only relief valve need to be reinstalled to 2 centre bore of cover board, can not only be repeated several times
It uses, and the quantity of crossing cabin part can be reduced, promote the integrally-built leakproofness of hatch board and stability.
Claims (5)
1. it is a kind of can fast opening and closing hatch board, including hatch fence（1）, the hatch fence（1）On have cover board（2）, cover board（2）
With hatch fence（1）One side in hinged cooperation；The cover board（2）There is centre bore, there is sealing device, cover board in centre bore（2）
Inside have locking device；It is characterized in that the locking device includes planet carrier（18）, the planet carrier（18）Axis and lid
Plate（2）Perpendicular and the two is in be fixedly connected；The planet carrier（18）Interior arranged concentric has ring gear（17）, ring gear（17）It is interior
There is sun gear（14）The planetary gear of no less than three（13）, planetary gear（13）It is distributed on sun gear（14）Periphery and and the sun
Wheel（14）It is meshed, planetary gear（13）And ring gear（17）It is meshed, ring gear（17）, sun gear（14）And planetary gear（13）
And planet carrier（18）It is rotating；The planet carrier（18）One side is distributed along the circumference with can be along planet carrier（18）Radial expansion
Locking level, one end of locking level is hinged on ring gear（17）On, the other end passes through guiding mechanism and cover board（2）It is connected；It is described
Hatch fence（1）Inside is distributed along the circumference with fore shaft（12）, under hatch board closed state, fore shaft（12）With the locking level
Outer end position corresponds；The locking device has central shaft（16）, the central shaft（16）Through the sun gear（14）And two
Person is in be fixedly connected, central shaft（16）Both ends stretch out in planet carrier（18）Outside, central shaft（16）Corresponding cover board（2）One end
End face have the blind hole of polygon（19）, central shaft（16）The other end be fixed with main handwheel（15）.
2. as described in claim 1 can fast opening and closing hatch board, it is characterised in that the guiding mechanism includes along cover board
（2）The guide holder of radial arrangement（51）, guide holder（51）Outer end all extend to cover board（2）Edge and the two are in be fixedly connected,
Guide holder（51）Inner end all extend to cover board（2）Center and it is integrally attached to an axle sleeve（52）On, the axle sleeve（52）It is sleeved on
The central shaft（16）Upper and the two is in be slidably matched；The guide holder（51）It is each attached to planet carrier（18）Periphery, planet carrier
（18）Pass through guide holder（51）With cover board（2）In being fixedly connected；The planet carrier（18）Corresponding cover board（2）On the outerplanar of one side
It is distributed along the circumference with axis pin（8）, guide holder（51）On have along cover board（2）The through hole of radial arrangement；The locking level includes connecting
Bar（9）And locking bar（11）, connecting rod（9）One end be sleeved on the axis pin（8）On, connecting rod（9）The other end and locking bar（11）In hinge
Connect cooperation, locking bar（11）Both pass through corresponding guide holder（51）Through hole.
3. as claimed in claim 2 can fast opening and closing hatch board, it is characterised in that the axle sleeve（52）With planet carrier（18）
Between that section of central shaft（16）On have the annular convex platform of integrally connected（4）, annular convex platform（4）With planet carrier（18）Between that section in
Mandrel（16）On be cased with compression spring（3）；The planet carrier（18）Corresponding main handwheel（15）There is locking slot in the outer surface of one side
（20）, the main handwheel（15）On have self-lock pin（21）, when locking device is by cover board（2）It is locked at hatch fence（1）When upper, institute
State self-lock pin（21）Positioned at locking slot（20）It is interior.
4. as described in claim 1 can fast opening and closing hatch board, it is characterised in that the central shaft（16）End face it is polygon
The blind hole of shape（19）For regular hexagon.
5. according to any one of claims 1 to 4 can fast opening and closing hatch board, it is characterised in that the sealing device is
Relief valve, relief valve are followed successively by bonnet from the outside to the core（71）, thread segment（72）With free-sliding spline section（73）, bonnet（71）Positioned at lid
Plate（2）Outside and bonnet（71）Outer diameter be more than cover board（2）The internal diameter of centre bore, thread segment（72）With cover board（2）Centre bore is in
Thread fitting, free-sliding spline section（73）It is connected with assistant's wheel（10）And the two in slide axially, circumferentially fixed cooperation, assistant wheel
（10）Pass through wheel seat（6）With cover board（2）In axial restraint, circumferentially rotate cooperation；The thread segment of the relief valve（72）On have edge
The gas pressure relief slot being longitudinally arranged（74）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711362648.3A CN108058786B (en) | 2017-12-18 | 2017-12-18 | Hatch cover capable of quick opening and closing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711362648.3A CN108058786B (en) | 2017-12-18 | 2017-12-18 | Hatch cover capable of quick opening and closing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108058786A true CN108058786A (en) | 2018-05-22 |
| CN108058786B CN108058786B (en) | 2023-12-19 |
Family
ID=62139314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711362648.3A Active CN108058786B (en) | 2017-12-18 | 2017-12-18 | Hatch cover capable of quick opening and closing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108058786B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108791706A (en) * | 2018-06-14 | 2018-11-13 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | A kind of manned underwater vehicle hatch board locking device |
| CN109823473A (en) * | 2019-03-07 | 2019-05-31 | 中船澄西船舶修造有限公司 | Hatchcover fixes device |
| CN111186530A (en) * | 2020-01-21 | 2020-05-22 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Quick and labor-saving opening and closing handle mechanism for pressure-resistant hatch cover |
| CN112591007A (en) * | 2019-10-02 | 2021-04-02 | 韩国模具股份有限公司 | Hatch assembly for ship |
| CN114771728A (en) * | 2022-03-26 | 2022-07-22 | 九江职院船舶与海洋工程技术有限公司 | Ship opening and closing device based on hydraulic cylinder buffering technology |
| CN115288537A (en) * | 2022-08-12 | 2022-11-04 | 无锡海核装备科技有限公司 | Unpowered opposite-opening type watertight porthole |
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