CN111963418A - Base reinforcing structure for cargo oil pump - Google Patents
Base reinforcing structure for cargo oil pump Download PDFInfo
- Publication number
- CN111963418A CN111963418A CN202010780857.5A CN202010780857A CN111963418A CN 111963418 A CN111963418 A CN 111963418A CN 202010780857 A CN202010780857 A CN 202010780857A CN 111963418 A CN111963418 A CN 111963418A
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- China
- Prior art keywords
- base
- oil pump
- web
- cargo oil
- panel
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- 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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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/22—Arrangements for enabling ready assembly or disassembly
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
- B63B27/24—Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines
- B63B27/25—Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines for fluidised bulk material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the field of ship manufacturing, in particular to a base reinforcing structure for a cargo oil pump, which comprises a base and a supporting piece, wherein the base is provided with a plurality of supporting pieces; the base is fixedly connected with the side wall of the cabin through a supporting piece, the base comprises a top plate and two bearing plates which are parallel to each other and fixedly connected to the bottom of the top plate, and the two bearing plates are fixedly connected through side plates; the supporting piece comprises a panel and two webs, the panel is in an isosceles trapezoid shape, the two webs are fixedly connected to two symmetrical oblique edges of the panel, an arc-shaped first notch is formed in the bottom of each web, a clamping groove corresponding to each web is formed in the lower surface of the top plate, and the top end of each web is clamped in the clamping groove; the invention has the beneficial effects that: the support piece can be directly installed in the cabin and is connected between the base and the side wall of the cabin, so that the working frequency of the base is changed, the rigidity of the base is improved, and vibration generated when the cargo oil pump works is reduced.
Description
Technical Field
The invention relates to the field of ship manufacturing, in particular to a base reinforcing structure for a cargo oil pump.
Background
The cargo oil pump is a special machine on a cargo oil carrier, and cargo oil loading and unloading are mainly performed by the cargo oil pump, so that the cargo oil pump is as important as a cargo lifting machine on a dry cargo ship. Due to the fact that cargo oil ships are different in size, different in oil loading variety and different in specific conditions of each type of ship, the requirements for cargo oil pumps are different.
The current cargo oil pump is after the installation, need you between base and the hull to fix the reinforcement, current base additional strengthening through additional strengthening to the base.
Because the hull design and manufacturing process are accomplished stage by stage, therefore current cargo oil pump base additional strengthening designs in advance before the cargo oil pump installation and installs in advance at the floor back in cargo oil pump place cabin at the in-process of hull construction in advance, so can enough reduce the occupation of ship to cabin inner space, be convenient for maintain the cargo oil pump and overhaul, can improve the efficiency of follow-up cargo oil pump installation simultaneously, follow-up cargo oil pump when the installation directly erects the base above additional strengthening and install can.
However, in the process of building the cargo oil transport ship, the design drawing and the specific parameter data of the cargo oil pump may be changed according to different conditions, so that the base installation position of the cargo oil pump in actual installation cannot correspond to the position of the original pre-installed reinforcing structure, the base is further directly installed on the bottom plate of the cabin, and the cargo oil pump can generate large vibration in use.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the base reinforcing structure for the cargo oil pump is directly additionally arranged in a cabin, can stabilize the cargo oil pump base and reduce vibration of the cargo oil pump during working.
In order to solve the technical problems, the technical scheme of the invention is as follows: a base reinforcing structure for a cargo oil pump comprises a base and a support piece;
the base is fixedly connected with the side wall of the cabin through a supporting piece, the base comprises a top plate and two bearing plates which are parallel to each other and fixedly connected to the bottom of the top plate, and the two bearing plates are fixedly connected through side plates;
the supporting piece comprises a panel and two webs, the panel is in an isosceles trapezoid shape, the two webs are fixedly connected to two symmetrical oblique edges of the panel, an arc-shaped first notch is formed in the bottom of each web, a clamping groove corresponding to each web is formed in the lower surface of the top plate, and the top end of each web is clamped in the clamping groove;
the panel is close to one side border of carrier plate and is equipped with the bellying, the recess that corresponds with the bellying is seted up on the carrier plate surface, the bellying inlays and locates in the recess, one side border and carrier plate fixed connection that the web is close to the base.
Specifically, one side that the web is close to the base is equipped with the trip, set up the bayonet socket that corresponds with the trip on the carrier plate of base, the trip joint is in the bayonet socket.
The clamping hook comprises a connecting rod, an upper hook part and a lower hook part, the height of a bayonet is equal to the length of the upper hook part, one end of the connecting rod is fixedly connected with the web, the other end of the connecting rod is fixedly connected with the upper hook part, the lower hook part is hinged to the bottom end of the upper hook part, and one side, close to the base, of the upper hook part is provided with a limiting block used for limiting the lower hook part to rotate in a single direction.
Specifically, the corner that the web top is close to the base is equipped with the second breach.
Specifically, four edges of the panel are provided with third notches.
Specifically, a first through hole is formed in the middle of the panel.
Specifically, a second through hole is formed in the middle of the top plate, and a third through hole is formed in the middle of the bearing plate.
Specifically, the carrier plate is trapezoidal in shape.
The invention has the beneficial effects that: the supporting piece can be directly arranged in the cabin and connects the base with the side wall of the cabin, so that the working frequency of the base is changed, the rigidity of the base is improved, and the vibration generated when the cargo oil pump works is reduced; when the ship body is impacted in a larger horizontal direction, the part of the first notch on the web plate can be more easily pressed to deform, so that the energy generated by impact is absorbed, and the damage of the connecting part between the cargo oil pump and the base is avoided; the panel is trapezoidal can make two webs form the stable structure of triangular supports, improves the stability of being connected between base and the cabin lateral wall.
Drawings
FIG. 1 is a schematic structural view of a base reinforcing structure for a cargo oil pump according to an embodiment of the present invention;
FIG. 2 is a side view of a base reinforcement structure for a cargo oil pump in accordance with an embodiment of the present invention;
FIG. 3 is a first enlarged partial view of a base reinforcement structure for a cargo oil pump in accordance with an embodiment of the present invention;
FIG. 4 is a second enlarged partial view of a base reinforcing structure for a cargo oil pump in accordance with an embodiment of the present invention;
FIG. 5 is a top view of a base reinforcement structure for a cargo oil pump in accordance with an embodiment of the present invention;
FIG. 6 is a schematic view of a cargo oil pump mounting structure according to an embodiment of the present invention;
description of reference numerals:
1. a top plate; 11. a card slot; 12. a second through hole; 2. a carrier plate; 21. a groove; 22. a bayonet; 23. a third through hole; 3. a side plate; 4. a panel; 41. a boss portion; 42. a third notch; 43. a first through hole; 5. a web; 51. a first notch; 52. a hook is clamped; 521. a connecting rod; 522. an upper hook part; 523. a lower hook part; 524. a limiting block; 53. a second notch.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 to 6, a base reinforcing structure for a cargo oil pump according to the present invention includes a base and a support;
the base is fixedly connected with the side wall of the cabin through a supporting piece, the base comprises a top plate 1 and two mutually parallel bearing plates 2 fixedly connected to the bottom of the top plate 1, and the two bearing plates 2 are fixedly connected through a side plate 3;
the supporting piece comprises a panel 4 and two webs 5, the panel 4 is in an isosceles trapezoid shape, the number of the webs 5 is two, the two webs 5 are fixedly connected to two symmetrical oblique edges of the panel 4, an arc-shaped first gap 51 is formed in the bottom of the web 5, a clamping groove 11 corresponding to the web 5 is formed in the lower surface of the top plate 1, and the top end of the web 5 is clamped in the clamping groove 11;
the panel 4 is close to one side border of carrier plate 2 and is equipped with bellying 41, the recess 21 that corresponds with bellying 41 is seted up on the carrier plate 2 surface, bellying 41 inlays and locates in recess 21, one side border and carrier plate 2 fixed connection that web 5 is close to the base.
The working principle of the invention is as follows: when the support piece is installed, the top end of the web plate 5 is aligned with the clamping groove 11 on the lower surface of the top plate 1, the web plate 5 is pushed towards the direction close to the base, the protruding portion 41 of the panel 4 is aligned with the groove 21 on the surface of the carrier plate 2, transition fit is adopted between the protruding portion 41 and the groove 21, the carrier plate 2 needs to be knocked towards the direction of the panel 4 gently by using a hammer, when the protruding portion 41 is smoothly embedded into the groove 21, the support piece and the base can be fixed relatively, the support piece and the cabin side wall are fixedly connected by welding or bolt connection, and the base is fixedly connected with the cabin floor in a welding or bolt connection mode.
After the reinforcing structure is installed, the bottom of the supporting piece is not contacted with the cabin floor, and the base is connected with the side wall of the cabin into a whole through the supporting piece, so that the resonance frequency of the base is changed, the rigidity of the base is increased, and the vibration reduction effect is achieved. Meanwhile, as the ship is greatly vibrated by sea waves when running on the sea, and the part connected with the base through the bolt is relatively fragile, in order to avoid the irreparable damage of the connecting part between the cargo oil pump and the base caused by the horizontal direction impact generated by the vibration of the ship body, the bottom of the web plate 5 of the supporting piece is provided with the arc-shaped first notch 51, so that when the ship body is impacted in the larger horizontal direction, the part of the first notch 51 on the web plate 5 can be more easily pressed to deform, the energy generated by the impact is further absorbed, and the damage of the connecting part between the cargo oil pump and the base is avoided.
Because the panel 4 is in an isosceles trapezoid shape, the webs 5 symmetrically connected to the two sides of the panel 4 are not parallel but form a structure similar to a triangular support, so that the connection stability between the base and the side wall of the cabin is further improved.
As can be seen from the above description, the beneficial effects of the present invention are: the supporting piece can be directly arranged in the cabin and connects the base with the side wall of the cabin, so that the working frequency of the base is changed, the rigidity of the base is improved, and the vibration generated when the cargo oil pump works is reduced; when the ship body is impacted in a larger horizontal direction, the part of the first notch on the web plate can be more easily pressed to deform, so that the energy generated by impact is absorbed, and the damage of the connecting part between the cargo oil pump and the base is avoided; the panel is trapezoidal can make two webs form the stable structure of triangular supports, improves the stability of being connected between base and the cabin lateral wall.
Further, one side that web 5 is close to the base is equipped with trip 52, set up the bayonet socket 22 that corresponds with trip 52 on the carrier plate 2 of base, trip 52 joint is in bayonet socket 22.
As can be seen from the above description, the web plate and the bearing plate are reinforced and connected through the clamping hook and the clamping hook, so that extra welding is not needed between the web plate and the bearing plate, and the installation efficiency is improved.
Further, 5 tops of web are the ascending of linear trend by the one side that is close to the cabin lateral wall to the one side that is close to the base, trip 52 includes connecting rod 521, upper hook portion 522 and lower hook portion 523, bayonet 22's height equals with the length of upper hook portion 522, connecting rod 521 one end and web 5 fixed connection, the other end and upper hook portion 522 fixed connection, lower hook portion 523 articulates in upper hook portion 522 bottom, one side that upper hook portion 522 is close to the base is equipped with and is used for restricting lower hook portion 523 one-way pivoted stopper 524.
It can be known from the above description, because the height of bayonet socket equals with the length of last portion of colluding, therefore the unable direct mount of trip gets into in the bayonet socket, only can incline support piece slightly, thereby make the web top rotate to the horizontality by the slope, promote support piece to the direction of base this moment, make on collude the portion and stretch into in the bayonet socket, after in the bellying embedding recess on the panel, will support and rotate to the normal position, the ditch portion is blocked by the edge of bayonet socket down in the rotation process, thereby relatively go up colluding the portion and take place to carry out clockwise rotation, and stretch into inside the bayonet socket, after colluding the portion stretches into the bayonet socket completely, lower portion resumes the normal position under the effect of dead weight, and because the restriction of the stopper, lower portion can't counter-clockwise turning, colluding the portion is gone into in the bayonet socket completely this moment, guaranteed the fixed connection between support piece and the.
Furthermore, a second notch 53 is arranged at the corner of the top of the web 5 close to the base.
As can be known from the above description, because the web top is the slope form, consequently the stress of web top joint edges and corners in the recess is great, sets up the second breach in edges and corners department and can avoid edges and corners department stress too big and take place to damage.
Further, the four corners of the panel 4 are provided with third notches 42.
Further, a first through hole 43 is formed in the middle of the panel 4.
As can be known from the above description, the panel middle part is seted up first through-hole and can be convenient for the staff to stretch into the instrument in the cargo oil pump below and overhaul the cargo oil pump from first through-hole.
Further, a second through hole 12 is formed in the middle of the top plate 1, and a third through hole 23 is formed in the middle of the carrier plate 2.
As can be seen from the above description, the second through hole of the top plate and the third through hole of the carrier plate can facilitate the staff to stretch the tool into the bottom of the cargo oil pump from the second through hole and the third through hole and overhaul the cargo oil pump.
Further, the carrier plate 2 has a trapezoidal shape.
From the above description, it can be seen that the trapezoidal shape of the carrier plate can improve the stability of the base.
Example one
A base reinforcing structure for a cargo oil pump comprises a base and a support piece;
the base is fixedly connected with the side wall of the cabin through a supporting piece, the base comprises a top plate 1 and two mutually parallel bearing plates 2 fixedly connected to the bottom of the top plate 1, the bearing plates 2 are in a trapezoidal shape, the two bearing plates 2 are fixedly connected through a side plate 3, a second through hole 12 is formed in the middle of the top plate 1, and a third through hole 23 is formed in the middle of the bearing plates 2;
the supporting piece comprises a panel 4 and two webs 5, the panel 4 is in an isosceles trapezoid shape, three notches 42 are arranged at four edges of the panel 4, a first through hole 43 is formed in the middle of the panel 4, the number of the webs 5 is two, the two webs 5 are fixedly connected to two symmetrical oblique edges of the panel 4, an arc-shaped first notch 51 is formed in the bottom of the web 5, a clamping groove 11 corresponding to the web 5 is formed in the lower surface of the top plate 1, and the top end of the web 5 is clamped in the clamping groove 11;
the panel 4 is close to one side border of carrier plate 2 and is equipped with bellying 41, the recess 21 that corresponds with bellying 41 is seted up on the carrier plate 2 surface, bellying 41 inlays and locates in recess 21, one side border and carrier plate 2 fixed connection that web 5 is close to the base.
Example two
A base reinforcing structure for a cargo oil pump convenient to connect comprises a base and a supporting piece;
the base is fixedly connected with the side wall of the cabin through a supporting piece, the base comprises a top plate 1 and two mutually parallel bearing plates 2 fixedly connected to the bottom of the top plate 1, the bearing plates 2 are in a trapezoidal shape, the two bearing plates 2 are fixedly connected through a side plate 3, a second through hole 12 is formed in the middle of the top plate 1, and a third through hole 23 is formed in the middle of the bearing plates 2;
the supporting piece comprises a panel 4 and two webs 5, the panel 4 is in an isosceles trapezoid shape, three notches 42 are arranged at four edges of the panel 4, a first through hole 43 is formed in the middle of the panel 4, the number of the webs 5 is two, the two webs 5 are fixedly connected to two symmetrical oblique edges of the panel 4, an arc-shaped first notch 51 is formed in the bottom of the web 5, a clamping groove 11 corresponding to the web 5 is formed in the lower surface of the top plate 1, and the top end of the web 5 is clamped in the clamping groove 11;
the panel 4 is close to one side border of carrier plate 2 and is equipped with bellying 41, the recess 21 that corresponds with bellying 41 is seted up on the carrier plate 2 surface, bellying 41 inlays and locates in recess 21, one side border and carrier plate 2 fixed connection that web 5 is close to the base.
One side that web 5 is close to the base is equipped with trip 52, set up the bayonet socket 22 that corresponds with trip 52 on the carrier plate 2 of base, trip 52 joint is in bayonet socket 22, 5 tops of web are the linear trend by one side that is close to the cabin lateral wall to the one side that is close to the base and risees, trip 52 includes connecting rod 521, upper hook portion 522 and lower hook portion 523, bayonet socket 22's height equals with upper hook portion 522's length, connecting rod 521 one end and 5 fixed connection of web, the other end with upper hook portion 522 fixed connection, lower hook portion 523 articulates in upper hook portion 522 bottom, one side that upper hook portion 522 is close to the base is equipped with and is used for restricting lower hook portion 523 one-way pivoted stopper 524.
In conclusion, the beneficial effects provided by the invention are as follows: the supporting piece can be directly arranged in the cabin and connects the base with the side wall of the cabin, so that the working frequency of the base is changed, the rigidity of the base is improved, and the vibration generated when the cargo oil pump works is reduced; when the ship body is impacted in a larger horizontal direction, the part of the first notch on the web plate can be more easily pressed to deform, so that the energy generated by impact is absorbed, and the damage of the connecting part between the cargo oil pump and the base is avoided; the panel is trapezoidal can make two webs form the stable structure of triangular supports, improves the stability of being connected between base and the cabin lateral wall. Carry out the reinforced connection through trip and trip between web and the carrier plate to make need not to carry out extra welding between web and the carrier plate, improve the installation effectiveness. Because the height of bayonet socket equals with the length of last portion of colluding, consequently the unable direct mount of trip gets into in the bayonet socket, only can incline support piece slightly, thereby make the web top rotate to the horizontality by the slope, promote support piece to the direction of base this moment, make on collude the portion and stretch into in the bayonet socket, after in the bellying embedding recess on the panel, will support and rotate to the normal position, it is blocked by the edge of bayonet socket to rotate in-process ditch portion down, thereby it takes place to carry out clockwise rotation to collude the portion relatively, and stretch into inside the bayonet socket, after colluding the portion and stretching into in the bayonet socket completely, collude the portion and resume the normal position under the effect of dead weight down, and because the restriction of the stopper, lower portion can't anticlockwise rotation, collude the portion and be blocked in the bayonet socket completely this moment, guaranteed the fixed connection between support piece and. Because the web top is the slope form, consequently the stress of web top joint edges and corners in the recess is great, sets up the second breach in edges and corners department and can avoid edges and corners department stress too big and take place to damage. The panel middle part is seted up first through-hole and can be convenient for the staff and stretch into cargo oil pump below and overhaul cargo oil pump with the instrument in following first through-hole. The second through-hole of roof and the third through-hole of carrier plate can be convenient for the staff stretch into the cargo oil pump bottom and overhaul the cargo oil pump with the instrument from second through-hole and third through-hole in. The carrier plate is trapezoidal shape and can makes base stability improve.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (8)
1. A base reinforcing structure for a cargo oil pump is characterized by comprising a base and a support piece;
the base is fixedly connected with the side wall of the cabin through a supporting piece, the base comprises a top plate and two bearing plates which are parallel to each other and fixedly connected to the bottom of the top plate, and the two bearing plates are fixedly connected through side plates;
the supporting piece comprises a panel and two webs, the panel is in an isosceles trapezoid shape, the two webs are fixedly connected to two symmetrical oblique edges of the panel, an arc-shaped first notch is formed in the bottom of each web, a clamping groove corresponding to each web is formed in the lower surface of the top plate, and the top end of each web is clamped in the clamping groove;
the panel is close to one side border of carrier plate and is equipped with the bellying, the recess that corresponds with the bellying is seted up on the carrier plate surface, the bellying inlays and locates in the recess, one side border and carrier plate fixed connection that the web is close to the base.
2. The base reinforcing structure for the cargo oil pump as defined in claim 1, wherein a hook is disposed on a side of the web close to the base, a bayonet corresponding to the hook is disposed on the bearing plate of the base, and the hook is fastened in the bayonet.
3. The base reinforcing structure for the cargo oil pump according to claim 2, wherein the top end of the web rises in a linear trend from a side close to the side wall of the cabin to a side close to the base, the hook comprises a connecting rod, an upper hook portion and a lower hook portion, the height of the bayonet is equal to the length of the upper hook portion, one end of the connecting rod is fixedly connected with the web, the other end of the connecting rod is fixedly connected with the upper hook portion, the lower hook portion is hinged to the bottom end of the upper hook portion, and a limit block for limiting the one-way rotation of the lower hook portion is arranged on a side of the upper hook portion close to the base.
4. The base reinforcing structure for a cargo oil pump as defined in claim 3, wherein a second notch is formed at a corner of the top of the web near the base.
5. The base reinforcing structure for a cargo oil pump as defined in claim 1, wherein a third notch is provided at each of four corners of the panel.
6. The base reinforcing structure for a cargo oil pump as defined in claim 1, wherein a first through hole is formed in a middle portion of the panel.
7. The base reinforcing structure for a cargo oil pump as defined in claim 1, wherein a second through hole is formed in a middle portion of the top plate, and a third through hole is formed in a middle portion of the carrier plate.
8. The base reinforcing structure for a cargo oil pump as defined in claim 1, wherein said carrier plate has a trapezoidal shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010780857.5A CN111963418A (en) | 2020-08-06 | 2020-08-06 | Base reinforcing structure for cargo oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010780857.5A CN111963418A (en) | 2020-08-06 | 2020-08-06 | Base reinforcing structure for cargo oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111963418A true CN111963418A (en) | 2020-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010780857.5A Pending CN111963418A (en) | 2020-08-06 | 2020-08-06 | Base reinforcing structure for cargo oil pump |
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| Country | Link |
|---|---|
| CN (1) | CN111963418A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114682972A (en) * | 2022-03-25 | 2022-07-01 | 中船黄埔文冲船舶有限公司 | Auxiliary device for assembling T-shaped material |
| CN114771764A (en) * | 2022-04-29 | 2022-07-22 | 广船国际有限公司 | Cargo oil pump installation method of chemical tanker |
| CN116105014A (en) * | 2023-04-12 | 2023-05-12 | 江苏长海消防装备有限公司 | Integral hand-lifting motor-driven oil pump |
-
2020
- 2020-08-06 CN CN202010780857.5A patent/CN111963418A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114682972A (en) * | 2022-03-25 | 2022-07-01 | 中船黄埔文冲船舶有限公司 | Auxiliary device for assembling T-shaped material |
| CN114771764A (en) * | 2022-04-29 | 2022-07-22 | 广船国际有限公司 | Cargo oil pump installation method of chemical tanker |
| CN116105014A (en) * | 2023-04-12 | 2023-05-12 | 江苏长海消防装备有限公司 | Integral hand-lifting motor-driven oil pump |
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