CN107235256A - Tank car and its transfer cask - Google Patents
Tank car and its transfer cask Download PDFInfo
- Publication number
- CN107235256A CN107235256A CN201710357576.7A CN201710357576A CN107235256A CN 107235256 A CN107235256 A CN 107235256A CN 201710357576 A CN201710357576 A CN 201710357576A CN 107235256 A CN107235256 A CN 107235256A
- Authority
- CN
- China
- Prior art keywords
- manhole
- flange
- neck
- transfer cask
- adpting flange
- 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.)
- Pending
Links
- 238000012546 transfer Methods 0.000 title claims abstract description 42
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 210000004907 gland Anatomy 0.000 claims description 18
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 description 4
- 210000002435 tendon Anatomy 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 241000233855 Orchidaceae Species 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/10—Manholes; Inspection openings; Covers therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention provides a kind of tank car and its transfer cask.Transfer cask includes tank body and manhole structure.Manhole is offered at the top of tank body.Manhole structure is at manhole.Manhole structure includes manhole flange, adpting flange, manhole neck and manhole cover.Manhole flange is fixed in manhole, and the periphery of manhole flange offers stud bolt hole.Adpting flange is connected with manhole flange dismounting.Manhole neck is fixed at the side of adpting flange dorsad manhole flange.Manhole cover is articulated with the side of manhole neck, the one end of manhole cover sealing manhole neck away from adpting flange.By being detachably connected for manhole flange and adpting flange, then when manhole neck is damaged, manhole neck can together be dismantled by dismantling adpting flange, be changed, be easy to the maintenance of the manhole structure.Also, the different use requirements of tank car are met from the other lid of pressure level is mutually applicable according to the operating mode used of tank car, the use scope of tank car is extended.
Description
Technical field
The present invention relates to chemical liquid conveying semi-trailer field, particularly a kind of tank car and its transfer cask.
Background technology
At present, in the design of Transportation of Dangerous Chemicals tank car, according to relevant laws and regulations and standard requirement, in the transfer cask of tank car
Top needs to be provided with operation manhole.Generally, when atmospheric dielectric is transported, transfer cask can use fast open type manhole knot
Structure.This kind of fast open type manhole structure generally includes manhole neck and manhole cover.Manhole cover is detachably on manhole neck, and cover people
Hole.By opening manhole cover, allow the operator to enter in transfer cask from manhole.Manhole neck is often by being weldingly fixed on
On transfer cask, if manhole neck is damaged, the manhole structure can not disassemble, and be unfavorable for the maintenance of manhole structure.
Also, because the pressure rating of this kind of manhole neck is relatively low, due to the pressure of the manhole neck of this kind of fast open type manhole structure
Power grade is relatively low, and this kind of fast open type manhole structure can only be installed on the tank car for transporting atmospheric dielectric.Therefore, biography is installed
The tank car of system fast open type manhole structure is limited using scope by the bearing capacity of manhole neck, can only be transported atmospheric dielectric, be made
Into the wasting of resources.
The content of the invention
It is an object of the invention to provide a kind of tank car and its transfer cask for being easy to safeguard manhole structure.
A kind of transfer cask, including：
Manhole is offered at the top of tank body, the tank body；
Manhole structure, at the manhole, seals the manhole, the manhole structure includes：
In manhole flange, the manhole for being fixed at the tank body；
Adpting flange, is detachably connected with the manhole flange；
Manhole neck, is fixed at the side of the adpting flange dorsad manhole flange；And
Manhole cover, is articulated with the side of the manhole neck, and the manhole cover seals the manhole neck away from the adpting flange
One end.
In a wherein embodiment, the neighboring of the manhole flange and the madial wall of the manhole are welded to connect.
In a wherein embodiment, in addition to eyelet bolt, the eyelet bolt be detachably connected the manhole cover with
The manhole neck.
In a wherein embodiment, the side of the manhole neck away from the adpting flange is provided with convex edge, the movable joint
One end of bolt and the spacing connection in the convex edge.
In a wherein embodiment, in addition to handle, the taper knob on the other end of the eyelet bolt, and
It is threadedly coupled with the eyelet bolt.
In a wherein embodiment, offered on the manhole cover provided with capping at charging door, the charging door, it is described
Capping is detachably located at the charging door.
In a wherein embodiment, in addition to stud and pad, the pad is sheathed on the stud.
In a wherein embodiment, in addition to sealing ring, the sealing ring is located at the manhole flange and the connection
Between flange.
A kind of transfer cask, including：
Manhole is offered at the top of tank body, the tank body；
Manhole structure, at the manhole, seals the manhole, the manhole structure includes：
In manhole flange, the manhole for being fixed at the tank body；
High gland body；
Normal pressure lid, including adpting flange, manhole neck and manhole cover, the adpting flange detachably connect with the manhole flange
Connect；The manhole neck is fixed at the side of the adpting flange dorsad manhole flange；The manhole cover is articulated with described
The side of manhole neck, the manhole cover seals the described one end of manhole neck away from the adpting flange；
The manhole flange is detachably connected with high gland body or the normal pressure lid.
A kind of tank car, including above-mentioned transfer cask.
Because the tank body of transfer cask is by manhole flange and adpting flange, make manhole cover can by manhole neck and manhole flange
Dismounting connection.When tank car is used to transport normal pressure transfer cask, manhole cover is tightly connected by the tank body of adpting flange and transfer cask, should
Manhole structure can be installed on normal pressure transfer cask.Also, because manhole cover is hinged with manhole neck, then it can realize quick opening
The purpose of manhole cover, and it is simple in construction, it is easy to operating personnel to operate.Also, when manhole neck is damaged, can directly it lead to
Cross adpting flange to disassemble the manhole neck damaged from tank car, changed, be easy to the maintenance of manhole structure.
When tank car is used to transport high-pressure transport tank, because manhole cover is detachable with manhole flange by adpting flange
Connection, then can disassemble above-mentioned adpting flange from manhole flange., can because the pressure rating of manhole flange is higher
Meet the installation requirements of high gland body.Therefore, directly high gland body and manhole flange are detachably connected and high pressure fortune can be achieved
It is defeated.According to the operating mode used of tank car from the other lid of pressure level is mutually applicable, making can root between normal pressure lid and high gland body
It is interchangeable according to applying working condition, meets the different use requirements of tank car, extends the use scope of tank car.
Brief description of the drawings
Fig. 1 is the tank body and the schematic cross-sectional view of manhole structure of the transfer cask of present embodiment；
Fig. 2 is the top view of the manhole structure according to Fig. 1.
Description of reference numerals is as follows：10th, transfer cask；11st, tank body；111st, manhole；12nd, manhole structure；121st, manhole flange；
122nd, normal pressure lid；123rd, adpting flange；1231st, stage portion；124th, manhole neck；1241st, convex edge；1242nd, hinge；125th, manhole
Lid；1251st, clamping part；1252nd, jig arm；1253rd, breach；1254th, charging door；1255th, convex tendon；126th, stud；127th, pad；
128th, sealing ring；129th, eyelet bolt；130th, handle；131st, cover；132nd, flange connector；133rd, screw rod.
Embodiment
Embodying the exemplary embodiment of feature of present invention and advantage will describe in detail in the following description.It should be understood that
The present invention can have various changes in different embodiments, and it is neither departed from the scope of the present invention, and theory therein
Bright and diagram is treated as purposes of discussion in itself, and is not used to the limitation present invention.
The present invention provides a kind of tank car and its transfer cask.Transfer cask is used to contain conveying medium, tank car transport tank.
Referring to Fig. 1, transfer cask 10 includes tank body 11 and manhole structure 12.The top of tank body 11 offers manhole 111.People
Pore structure seals manhole 111 at manhole 111.
Manhole structure 12 includes manhole flange 121, normal pressure lid 122 and high gland body（It is not shown）.Normal pressure lid 122 with
High gland body can be realized with manhole flange 121 and is detachably connected.When normal pressure lid 122 is damaged, manhole knot
Structure 12 can directly change normal pressure lid 122, be easy to safeguard.Transfer cask can be selected to use normal pressure lid according to operating mode needs
122 with high gland body.
Specifically in the present embodiment, normal pressure lid 122 includes adpting flange 123, manhole neck 124 and manhole cover 125.
Manhole flange 121 is fixed in the manhole 111 of tank body 11, and the periphery of manhole flange 121 offers stud bolt hole.Tool
Body, the neighboring of manhole flange 121 and the madial wall of manhole 111 are welded to connect.
Adpting flange 123 is detachably connected with manhole flange 121.Adpting flange 123 can by bolt and manhole flange 121
Dismounting connection.
Manhole structure 12 also includes stud 126 and pad 127.Pad 127 is sheathed on stud 126.Pad 127 can make
What stud 126 was stablized is fastenedly connected flange 123 and manhole flange 121, it is ensured that adpting flange 123 and manhole flange 121 are stably
It is fastenedly connected.
Manhole structure 12 also includes sealing ring 128.Sealing ring 128 is located between manhole flange 121 and adpting flange 123.
Sealing ring 128 can strengthen the sealing of manhole structure 12.
Manhole neck 124 is fixed at the side of the dorsad manhole flange 121 of adpting flange 123.Specifically, manhole neck 124 with
Adpting flange 123 is welded to connect.Adpting flange 123 dorsad manhole flange 121 one side provided with annular stage portion 1231.For
Convenient explanation, is now referred to as lower surface by the one side of adpting flange 123 towards manhole flange 121, by the dorsad people of adpting flange 123
The side of hole flange 121 is referred to as upper surface.
Then the stage portion 1231 is on the upper surface of adpting flange 123, and stage portion 1231 is along the upper of adpting flange 123
The inner ring on surface is set.And the height of stage portion 1231 is less than the external annular surface of upper surface.When by manhole neck 124 and adpting flange
When 123 connection, stage portion 1231 provides the solder side that manhole neck 124 is welded to connect with adpting flange 123, and convenient welding connects
Connect.
Manhole cover 125 is articulated with the side of manhole neck 124.Manhole cover 125 seals manhole neck 124 away from adpting flange 123
One end.
Because the tank body 11 of transfer cask 10 is by manhole flange 121 and adpting flange 123, manhole cover 125 and manhole are realized
Manhole flange 121 at 111 is detachably connected., can be by tearing open when manhole neck 124 and manhole cover 125 are damaged
Adpting flange 123 is unloaded, the manhole neck 124 damaged and manhole cover 125 are changed, is easy to the maintenance of above-mentioned manhole structure 12.
Also, when tank car is used to transport normal pressure transfer cask, manhole cover 125 passes through adpting flange 123 and transfer cask
Tank body 11 be tightly connected.Because manhole cover 125 is hinged with manhole neck 124, then the quick mesh for opening manhole cover 125 can be realized
, it is easy to operating personnel to operate.
When tank car is used to transport high-pressure transport tank, to maintain the pressure of transfer cask, the weight of high gland body is usual
It is heavier.Because the pressure rating of manhole flange 121 is higher, manhole flange 121 disclosure satisfy that the installation of heavier high gland body is needed
Ask.Above-mentioned adpting flange is disassembled from manhole flange, is directly detachably connected high gland body with manhole flange 121,
High-pressure transport can be achieved.Because high gland body can carry higher pressure, therefore the tank car can be also used for transport high pressure fortune
Defeated tank.Therefore, above-mentioned transfer cask can extend the applying working condition of tank car.
It is appreciated that high gland body can be blank flange.High gland body can be other structures form, as long as can protect
The high voltage intensity of transfer cask is demonstrate,proved, can be detachably connected with manhole flange 121.
Manhole structure 12 also includes eyelet bolt 129.Eyelet bolt 129 is detachably connected manhole cover 125 and manhole neck
124。
As shown in Fig. 2 specifically, side of the manhole neck 124 away from adpting flange 123 is provided with convex edge 1241.Eyelet bolt
129 one end provided with annulus are rotatably connected with convex edge 1241.The edge of manhole cover 125 corresponds to eyelet bolt 129 provided with folder
Hold portion 1251.The clamping part 1251 includes forming a breach 1253 between two jig arm 1252 being oppositely arranged, two jig arm.Movable joint spiral shell
Bolt 129 is rotated relative to convex edge 1241, enables the breach 1253 of movable bolt access manhole lid 125.Swivel joint bolt
129, the other end of eyelet bolt 129 is entered in the breach 1253.
The other end of eyelet bolt 129 is provided with handle 130.Handle 130 is sheathed on eyelet bolt 129, and with movable joint spiral shell
Bolt 129 is threadedly coupled.By rotating handle 130, handle 130 can compress convex edge 1241 and clamping part 1251, so that manhole cover
125 are fastenedly connected with convex edge 1241.When dismounting manhole cover 125 are needed, handle 130 is rotated backward, makes handle 130 and folder
Hold portion 1251 to unclamp, swivel joint bolt 129, eyelet bolt 129 is removed manhole cover 125 out of breach 1253, so as to
Make manhole cover 125 rotatable relative to convex edge 1241, manhole cover 125 is opened.
As shown in Fig. 2 specifically in the present embodiment, eyelet bolt 129 and handle 130 are multiple, are uniformly distributed in
The surrounding of manhole cover 125.During so that manhole cover 125 being connected with manhole neck 124, the stress between manhole cover 125 and manhole neck 124
Uniformly.Accordingly, blessing portion 1251 is also multiple, and correspondence eyelet bolt 129 and handle 130 are set.Specifically, eyelet bolt
129 and handle 130 be 6, blessing portion 1251 also be 6, herein the number to eyelet bolt 129 and handle 130 do not do
Limit, as long as manhole cover 125 can be enable to keep being stably connected with manhole neck 124.
Also, the convex edge 1241 positioned at the side of manhole neck 124 is provided with hinge 1242.Manhole cover 125 passes through hinge and people
Hole neck 124 is realized and is hinged.It is hinged it is appreciated that manhole cover 125 can also be realized with manhole neck 124 by bearing pin and axis hole.
Manhole cover 125 is provided with convex tendon, one end end face of the manhole neck 124 towards manhole cover 125 towards the side of manhole neck 124
Provided with groove, then convex tendon and groove mating connection, to strengthen manhole cover 125 and the sealing before manhole neck 124.
Charging door 1254 is offered on manhole cover 125.Provided with capping 131 at charging door 1254.Capping 131 is detachably located at
Charging door 1254.Charging function can be realized by charging door 1254, increase the function of manhole structure 12.Specifically, manhole cover
125 are overarched, and charging door 1254 is opened at the protrusion of the arch manhole cover 125.Manhole cover 125 overarches, and can increase manhole
The area of lid 125, the pressure suffered by preferably scattered manhole cover 125, improves the carrying pressure of manhole cover 125.
Specifically, capping 131 is blank flange.Flange connector 132 is welded with the madial wall of charging door 1254.Connection is convex
Screw is equally offered on edge 132, then blank flange is threadedly coupled by screw rod 133 with flange connector 132, to reach capping
The purpose of 131 sealing charging doors 1254.
Manhole cover 125 of the above-mentioned manhole structure with charging door 1254, handle 130, eyelet bolt 129, manhole neck 124, company
Acting flange 123, manhole flange 121, transfer cask 10 are constituted.Manhole flange 121 is welded with transfer cask 10, manhole cover 125, handle
130th, assembled between eyelet bolt 129, manhole neck 124.Manhole neck 124 and manhole flange 121 are passed through into adpting flange again
123 connections, the upper and lower surface of adpting flange 123 is engaged with manhole neck 124 and manhole flange 121 respectively.First by manhole neck
124 are connected with 123 groups of welderings of adpting flange, and adpting flange 123 and the manhole flange 121 of 10 groups of welderings of transfer cask finally are passed through into stud
126th, pad 127, screw rod 133 are attached.Above-mentioned manhole structure can finally realize the work(of removable quick opening manhole's structure
Can, and it is simple in construction, easy to operate.
Above-mentioned manhole structure is except can conveniently open manhole cover and charging function, moreover it is possible to according to the use work of tank car
Condition, dismounting exchange is carried out to whole manhole structure.Increase an adpting flange between manhole neck 124 and manhole flange 121
123.Normal in use, only needing to expire by handle 130, eyelet bolt 129, the manhole cover 125 with charging door 1254
Sufficient tank car ships the use requirement of normal pressure chemical medium.During the chemical medium for such as needing shipment pressure higher, only it need to pass through connection method
Stud 126, pad 127 between orchid 123 and manhole flange 121 disassemble manhole cover 125, and change the outfit high gland body and manhole
Flange 121 is connected.Therefore, normal pressure lid is made from the other lid of pressure level is mutually applicable according to the operating mode used of tank car
It can be interchangeable between high gland body according to applying working condition, meet the different use requirements of tank car.
Although describing the present invention with reference to several exemplary embodiments, it is to be understood that, term used be explanation and
Exemplary and nonrestrictive term.Due to the present invention can be embodied in a variety of forms without departing from invention spirit or
Essence, it should therefore be appreciated that above-mentioned embodiment is not limited to any foregoing details, and should be limited in appended claims
Widely explained in spirit and scope, thus the whole changes fallen into claim or its equivalent scope and remodeling all should be with
Attached claim is covered.
Claims (10)
1. a kind of transfer cask, it is characterised in that including：
Manhole is offered at the top of tank body, the tank body；
Manhole structure, at the manhole, seals the manhole, the manhole structure includes：
In manhole flange, the manhole for being fixed at the tank body；
Adpting flange, is detachably connected with the manhole flange；
Manhole neck, is fixed at the side of the adpting flange dorsad manhole flange；And
Manhole cover, is articulated with the side of the manhole neck, and the manhole cover seals the manhole neck away from the adpting flange
One end.
2. transfer cask according to claim 1, it is characterised in that the neighboring of the manhole flange is interior with the manhole
Sidewall weld is connected.
3. transfer cask according to claim 1, it is characterised in that also including eyelet bolt, the eyelet bolt is detachable
Connect the manhole cover and the manhole neck.
4. transfer cask according to claim 3, it is characterised in that the side of the manhole neck away from the adpting flange is set
There are convex edge, one end of the eyelet bolt and the spacing connection in the convex edge.
5. transfer cask according to claim 3, it is characterised in that also including handle, the taper knob is located at the movable joint
On the other end of bolt, and it is threadedly coupled with the eyelet bolt.
6. transfer cask according to claim 1, it is characterised in that charging door, the charging are offered on the manhole cover
Provided with capping at mouthful, the capping is detachably located at the charging door.
7. transfer cask according to claim 1, it is characterised in that also including stud and pad, the pad is sheathed on institute
State on stud.
8. transfer cask according to claim 1, it is characterised in that also including sealing ring, the sealing ring is located at the people
Between hole flange and the adpting flange.
9. a kind of transfer cask, it is characterised in that including：
Manhole is offered at the top of tank body, the tank body；
Manhole structure, at the manhole, seals the manhole, the manhole structure includes：
In manhole flange, the manhole for being fixed at the tank body；
High gland body；
Normal pressure lid, including adpting flange, manhole neck and manhole cover, the adpting flange detachably connect with the manhole flange
Connect；The manhole neck is fixed at the side of the adpting flange dorsad manhole flange；The manhole cover is articulated with described
The side of manhole neck, the manhole cover seals the described one end of manhole neck away from the adpting flange；
The manhole flange is detachably connected with high gland body or the normal pressure lid.
10. a kind of tank car, it is characterised in that including the transfer cask described in claim 1-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710357576.7A CN107235256A (en) | 2017-05-19 | 2017-05-19 | Tank car and its transfer cask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710357576.7A CN107235256A (en) | 2017-05-19 | 2017-05-19 | Tank car and its transfer cask |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107235256A true CN107235256A (en) | 2017-10-10 |
Family
ID=59984953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710357576.7A Pending CN107235256A (en) | 2017-05-19 | 2017-05-19 | Tank car and its transfer cask |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107235256A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108253440A (en) * | 2018-03-08 | 2018-07-06 | 湖南水口山有色金属集团有限公司 | A kind of flue manhole door |
| CN109812689A (en) * | 2019-03-04 | 2019-05-28 | 荆门宏图特种飞行器制造有限公司 | Transportable pressure vessel |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4659251A (en) * | 1985-09-23 | 1987-04-21 | Dover Corporation | Liquid spill container and method of making and installing same |
| EP0381489A2 (en) * | 1989-02-01 | 1990-08-08 | Great Eastern (Bermuda) Ltd. | Tank entry procedure and apparatus |
| US20020176742A1 (en) * | 2001-04-09 | 2002-11-28 | Robinson Mark D. | Method of converting existing negative pressure tank access ways |
| CN201882488U (en) * | 2010-12-09 | 2011-06-29 | 大庆摩恩达工程有限公司 | Quick-open manhole |
| CN202464541U (en) * | 2012-03-01 | 2012-10-03 | 中国国际海运集装箱(集团)股份有限公司 | Manhole cover and lining tank container provided with same |
| CN106347890A (en) * | 2016-10-31 | 2017-01-25 | 中车长江车辆有限公司 | Manhole device |
| CN206750623U (en) * | 2017-05-19 | 2017-12-15 | 荆门宏图特种飞行器制造有限公司 | Tank car and its transfer cask |
-
2017
- 2017-05-19 CN CN201710357576.7A patent/CN107235256A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4659251A (en) * | 1985-09-23 | 1987-04-21 | Dover Corporation | Liquid spill container and method of making and installing same |
| EP0381489A2 (en) * | 1989-02-01 | 1990-08-08 | Great Eastern (Bermuda) Ltd. | Tank entry procedure and apparatus |
| US20020176742A1 (en) * | 2001-04-09 | 2002-11-28 | Robinson Mark D. | Method of converting existing negative pressure tank access ways |
| CN201882488U (en) * | 2010-12-09 | 2011-06-29 | 大庆摩恩达工程有限公司 | Quick-open manhole |
| CN202464541U (en) * | 2012-03-01 | 2012-10-03 | 中国国际海运集装箱(集团)股份有限公司 | Manhole cover and lining tank container provided with same |
| CN106347890A (en) * | 2016-10-31 | 2017-01-25 | 中车长江车辆有限公司 | Manhole device |
| CN206750623U (en) * | 2017-05-19 | 2017-12-15 | 荆门宏图特种飞行器制造有限公司 | Tank car and its transfer cask |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108253440A (en) * | 2018-03-08 | 2018-07-06 | 湖南水口山有色金属集团有限公司 | A kind of flue manhole door |
| CN109812689A (en) * | 2019-03-04 | 2019-05-28 | 荆门宏图特种飞行器制造有限公司 | Transportable pressure vessel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171010 |
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| RJ01 | Rejection of invention patent application after publication |