CN210936470U - Descaling box device that can overturn - Google Patents
Descaling box device that can overturn Download PDFInfo
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- CN210936470U CN210936470U CN201921462085.XU CN201921462085U CN210936470U CN 210936470 U CN210936470 U CN 210936470U CN 201921462085 U CN201921462085 U CN 201921462085U CN 210936470 U CN210936470 U CN 210936470U
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Abstract
The utility model discloses a turnover descaling box device, which comprises a high-pressure water jet rotary joint, an upper box body, a lower box body device and a driving device; the upper box body device comprises an upper box body and an upper descaling ring fixed on the upper box body; the lower box body device comprises a lower box body and a lower descaling pipe component fixed on the lower box body; the upper box body is buckled above the lower box body; the two ends of the high-pressure water jet rotary joint are symmetrically provided with clamping seats, one side of the lower box body is connected with a corresponding clamping seat mounting frame, and the clamping seats are fixed on the clamping seat mounting frame; one end of the high-pressure water jet rotary joint is provided with a high-pressure water inlet joint for supplying water to the upper descaling ring; one end of the lower descaling pipe assembly is a water inlet end connected with a water supply pipe; the action end of the driving device is hinged with the upper part of one side wall of the upper box body to drive the upper box body device to turn over and open; the steel billet passes through the other pair of side walls of the upper box body, and the upper descaling ring and the lower descaling pipe spray and descale the periphery of the steel billet. When a fault occurs, the upper box body device is turned over and opened, and the steel billet is quickly lifted away from the conveying roller way.
Description
Technical Field
The utility model relates to a steel surface descaling equipment specifically is a descaling box device that can overturn.
Background
High-pressure water descaling is a clean and efficient metal surface treatment technology and is widely applied to domestic large and small hot rolling mills at present. The high-pressure water descaling not only can quickly and effectively remove the iron scale on the surface of the steel blank to be rolled, but also can effectively restrain metal dust generated in the rolling process. The descaling box is used as a final actuating mechanism of the whole descaling system, is required to play a role in preventing water and iron scale from splashing, and is generally of an integral structure.
As a conventional metal forming treatment technology, the metal hot rolling process has many influencing factors, especially the influence of temperature. When the billet which can not meet the rolling temperature requirement enters the rolling mill, the rolling force of the rolling mill is rapidly increased, the rolling mill runs in an overload mode, the rolling mill is damaged, tripping is caused, and a driving motor of the rolling mill is burnt out by a serious person.
After the billet is heated to the rolling temperature (usually 1000-1250 ℃), the billet passes through a roller conveyor and is descaled by a descaling box and then enters a rolling mill for rolling. In the process of rolling the steel billet, if the conveying roller way fails or the rolling mill fails, the steel billet to be rolled stays on the conveying roller way, and after an operator presses an emergency stop button of the descaling system, a large amount of high-pressure water is still sprayed to the steel billet to be rolled by the descaling nozzle due to certain response time of opening of an unloading valve used in the system, so that the temperature of the steel billet is sharply reduced. At this time, the temperature of the billet cannot meet the rolling requirement, and the billet needs to be removed from the roller conveyor and returned to the furnace for reheating.
The descaling box is firstly hung from the roller conveyor to separate the steel billet. The integral descaling box is hoisted away, a connecting hose between the descaling ring and the high-pressure pipe needs to be detached, and then the descaling box and a connecting nut of a fixed seat of the descaling box are unscrewed, so that the descaling box can be hoisted away. After the steel billet is hung from the roller conveyor, the descaling box needs to be put in place again by repeating the steps. The process not only wastes a great deal of time and delays the normal production of a steel mill, but also increases the labor intensity of field personnel.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a steel billet descaling in-process system can hang the steel billet fast from the rollgang when breaking down, and can quick the descaling box device who resets after troubleshooting.
The utility model provides a turnover descaling box device, which comprises a high-pressure water jet rotary joint, an upper box body device, a lower box body device and a driving device; the upper box body device comprises an upper box body and an upper descaling ring fixed on the upper box body; the lower box body device comprises a lower box body and a lower descaling pipe component fixed on the lower box body; the upper box body is buckled above the lower box body; the two ends of the high-pressure water jet rotary joint are symmetrically provided with clamping seats, one side of the lower box body is connected with a corresponding clamping seat mounting frame, and the clamping seats are fixed on the clamping seat mounting frame; one end of the high-pressure water jet rotary joint is provided with a high-pressure water inlet joint for supplying water to the upper descaling ring; one end of the lower descaling pipe assembly is a water inlet end and is connected with a high-pressure water supply pipe; the action end of the driving device is hinged with the upper part of one side wall of the upper box body to drive the upper box body device to turn over and open; the steel billet passes through the other pair of side walls of the upper box body, and the periphery of the steel billet is sprayed and descaled through the upper descaling ring and the lower descaling pipe.
In one embodiment of the above technical scheme, the upper box body is a hollow cuboid with a lower opening, the upper part of the connecting side of the driving device is provided with a hinged lug seat, the upper part of the other pair of side walls is connected with a lifting lug convenient for the lifting of the upper box body, and the lower part of the other pair of side walls is provided with a notch through which the steel billet passes.
In an implementation manner of the above technical scheme, the upper descaling ring is a U-shaped ring matched with the inner cavity of the upper tank body, and includes two vertical water collecting pipes and two horizontal water collecting pipes, the two vertical water collecting pipes are arranged in bilateral symmetry, two ends of each horizontal water collecting pipe are blind ends and are connected to the upper ends of the two vertical water collecting pipes, and the opposite sides of the two vertical water collecting pipes and the lower sides of the horizontal water collecting pipes are both connected with descaling nozzles for respectively spraying and descaling the left side, the right side and the upper side of the steel billet.
In one embodiment of the above technical solution, the lower end of the vertical water collecting pipe is connected with a vertical plug, and the upper end of the vertical water collecting pipe is connected with the horizontal water collecting pipe in a manner of splicing and welding; a water inlet pipe is connected to the outer side of the bottom of one of the vertical water collecting pipes, and a corresponding abdicating groove is formed in the upper box body corresponding to the water inlet pipe; the outer side of the vertical water collecting pipe is welded with the side wall of the upper box body, and the upper side and two ends of the horizontal water collecting pipe are welded with the top surface of the upper box body.
In one embodiment of the above technical solution, the lower box body is a square enclosure frame with an upper opening and a lower opening, the planar size of the lower box body is the same as that of the upper box body, the cassette mounting frame is connected to the upper portions of the side walls of the lower box body and the upper box body corresponding to the hinged ear seats, and the other pair of side walls of the lower box body is connected with lifting lugs for lifting; the lower part of the side wall of the lower box body is connected with a box body fixing plate, and the lower box body is arranged on the foundation through the box body fixing plate and a fastening piece.
In one embodiment of the above technical scheme, the lower descaling pipe assembly comprises a lower descaling pipe and a mounting frame, the lower descaling pipe comprises a horizontal water inlet pipe, a horizontal water collecting pipe, a horizontal connecting pipe and a horizontal plug which are connected in sequence, the upper side of the horizontal water collecting pipe is connected with a descaling spray head, and the horizontal water inlet pipe, the horizontal connecting pipe and the horizontal water collecting pipe are all in a splicing and welding connection mode; the mounting bracket includes the channel-section steel and welds the mounting panel in its lower extreme, and two mounting brackets use the channel-section steel to pass the mounting bracket respectively with opening vertical symmetrical arrangement outwards, horizontal inlet tube and horizontal connecting pipe's outer end.
In an embodiment of the above technical solution, the lower descaling pipes are arranged in parallel under the transverse water collecting pipe, mounting holes are formed in the corresponding side walls of the lower box body at mounting positions corresponding to the lower descaling pipes, support plates are arranged outside the side walls, and the mounting plates are fastened to the support plates through bolts.
In an embodiment of the above technical scheme, the rotating shafts at two ends of the high-pressure water jet rotary joint are symmetrically provided with annular grooves, and the mounting hole on the clamping seat for mounting on the high-pressure water jet rotary joint is a vertical waist-shaped hole.
In an implementation manner of the above technical solution, each descaling spray nozzle on the horizontal water collecting pipe, the vertical water collecting pipe and the horizontal water collecting pipe has an inclination angle opposite to the billet advancing direction, and meanwhile, adjacent descaling spray nozzles of each water collecting pipe deflect at an angle in the same direction to avoid jet water flow interference.
In an embodiment of the above technical solution, the driving device is a hydraulic cylinder or an electric push rod.
The device is of a split structure, the box body and the descaling ring are divided into an upper part and a lower part, the upper descaling ring and the upper box body are an integral piece, the lower box body and the lower descaling pipe are an integral piece, meanwhile, the upper descaling ring is conveyed by a high-pressure water jet rotary joint of the patent product of the applicant to be descaled, the upper box body is connected with a driving device, the upper box body is overturned through the driving device, and the upper descaling ring and the upper box body are integral pieces, so that when a system fails in a billet descaling process, the upper box body device can be quickly overturned and opened, and billets can be quickly lifted off from a conveying roller way. Compared with the integral structure in the prior art, the automatic feeding device has the advantages of being simple and fast to operate, greatly saving time and reducing labor intensity of workers. After the fault is eliminated, the upper box body device can be quickly buckled on the lower box body through the driving device in the same way. When the steel billet is descaled, the top surface and the side surface of the device are both closed, so that water and scale can be prevented from splashing, and the falling scale can be recovered by taking the bottom surface of the device as the opening side.
Drawings
Fig. 1 is a schematic front view of an embodiment of the present invention.
Fig. 2 is a schematic top view of fig. 1.
Fig. 3 is a schematic view a-a in fig. 2.
Fig. 4 is a schematic cross-sectional view of the upside-down state of the upper case device in this embodiment.
Fig. 5 is a front view of the upper case device of fig. 1.
Fig. 6 is a top view of fig. 5.
Fig. 7 is a schematic view of B-B in fig. 6.
FIG. 8 is a schematic top view of the upper descaling ring of FIG. 7.
Fig. 9 is a schematic sectional view of C-C in fig. 8.
Fig. 10 is a schematic cross-sectional view of D-D in fig. 9.
Fig. 11 is a front view of the lower housing assembly of fig. 1.
Fig. 12 is a top view of fig. 11.
Fig. 13 is a side view of fig. 11.
FIG. 14 is a schematic front view of the lower descaling tube assembly of FIG. 11.
FIG. 15 is a schematic cross-sectional view E-E of FIG. 14.
Fig. 16 is a side view of fig. 14.
Fig. 17 is a schematic view of an assembly structure of the upper and lower clamping seats.
Detailed Description
As can be seen from fig. 1 to 4, the reversible descaling box device disclosed by the embodiment comprises an upper box body device 1, a lower box body device 2, a high-pressure water jet rotary joint 3, a clamping seat 4 and a driving device 5.
As can be seen from fig. 1 to 4 and 5 to 7, the upper tank assembly 1 includes an upper tank 11 and an upper descaling ring 12.
The upper box body 11 is a hollow cuboid with a lower opening, the upper part of the connecting side of the driving device is provided with a hinged lug seat 111, the upper part of the other pair of side walls is connected with a lifting lug DR convenient for hoisting the upper box body, and the lower part of the other pair of side walls is provided with a notch 112 allowing a billet to pass through.
As can be seen from fig. 1 to 10, the upper descaling ring 12 includes two vertical water collecting pipes 121, two horizontal water collecting pipes 122 and a descaling spray head PT, the two vertical water collecting pipes 121 are arranged symmetrically, the lower ends of the two vertical water collecting pipes are connected with plugs DT, and the inner ends of the plugs are padded with sealing rings.
The two ends of the horizontal water collecting pipe 122 are blind ends and are connected to the upper ends of the two vertical water collecting pipes 121, and the joints are connected in a splicing and welding manner to prevent water leakage at the joints.
The lower side of the transverse water collecting pipe 122 and the inner side of the vertical water collecting pipe 121 are respectively welded with descaling nozzles PT, the arrangement positions of the descaling nozzles correspond to the billet passing position, high-pressure water is respectively sprayed to the upper side, the left side and the right side of a billet when the billet passes through, when the descaling nozzles are welded and positioned on the transverse water collecting pipe 122 and the two vertical water collecting pipes 121, an inclination angle α opposite to the advancing direction of the billet is arranged, and adjacent descaling nozzles on the same water collecting pipe deflect β angles towards the same direction.
The outer side of the bottom of the left vertical water collecting pipe is connected with a water inlet pipe, and a corresponding abdicating groove is formed in the upper tank body corresponding to the water inlet pipe; the outside of vertical collector pipe and the lateral wall welding of last box, the upside and the both ends of horizontal collector pipe and the top surface welding of last box.
As can be seen in fig. 1 to 4 and 11 to 16, the lower tank assembly 2 includes a lower tank 21 and a lower descaling pipe assembly 22.
The lower box body 21 is a square enclosure frame with upper and lower openings, the plane size of the lower box body is the same as that of the upper box body 11, and the outer wall of the lower box body is connected with a clamping seat mounting frame 211, a lifting lug DR and a box body fixing plate 212. The cassette mounting bracket 211 is a pi-shaped bracket. The lower box body is fixed on the foundation through the box body fixing plate 212 and the fastening piece, and the lower box body is hoisted through the lifting lugs on the side wall of the lower box body.
The lower descaling pipe assembly 22 includes a horizontal water inlet pipe 221, a horizontal water collecting pipe 222, a horizontal connection pipe 223, a plug DT, a channel steel 224 and a mounting plate 225.
The horizontal water inlet pipe 221, the horizontal water collecting pipe 222 and the horizontal connecting pipe 223 are sequentially connected in a splicing and welding mode, a plug DT is connected to the right end of the horizontal connecting pipe 223, the upper side of the horizontal water collecting pipe 222 is connected with a descaling spray head PT, the descaling spray head PT forms a lower descaling pipe after being assembled, a sealing ring is arranged at the inner end of the plug DT, and when the descaling spray head is welded on the horizontal water collecting pipe, the descaling spray head on the horizontal water collecting pipe of the upper descaling ring is arranged at α angles and β angles which are the same as those of the descaling spray head on the horizontal water collecting.
The mounting plate 225 has bolt mounting holes.
The horizontal water collecting pipe 222 of the lower descaling pipe assembly 22 is connected to the middle part of the lower box body 21 and is right below the corresponding horizontal water collecting pipe 122, the side wall of the lower box body 21 is connected with the supporting plate 213, and the mounting plate 225 and the supporting plate 213 of the mounting frame are fixedly connected through bolts and nuts, so that the assembly, disassembly and replacement are convenient. When the lower descaling pipe assembly 22 is installed on the lower box body 21, the lower descaling pipe assembly is hoisted through the lifting lugs.
And the lower end of the vertical water collecting pipe of the upper descaling ring and the end of the horizontal connecting end of the lower descaling pipe are connected with each other by water, so that welding slag in the pipeline is discharged, and the descaling spray head is prevented from being blocked by the welding slag. And after the welding slag is discharged, the plug and the sealing ring are well installed.
The descaling water of the upper descaling ring is fed through the high-pressure water jet rotary joint 3, the descaling water of the lower descaling pipe assembly is fed through the horizontal water inlet pipe 221, and the horizontal water inlet pipe is connected with the high-pressure water supply hose.
The high-pressure water jet rotary joint 3 is modified on the basis of the patents already granted by the applicant, wherein the patent numbers of the granted patents are as follows: ZL 201821946645.4. The concrete modification is that high-pressure water enters from one end of the rotary joint, and one end of the rotary joint is connected with a high-pressure water inlet joint 31 which is connected with a high-pressure water delivery hose.
High-pressure water is sent out from the middle connecting pipe of the rotary joint, the other end of the rotary joint is sealed by the end cover, and the flat grooves 32 are milled on the fixed shafts connected with the two end covers.
As can be seen from fig. 1 to 4, the high-pressure water jet rotary joint 3 is fixed by the clamping base 4. As can be seen from fig. 17, the clamping seat 4 includes a lower clamping seat 41 and an upper clamping seat 42, the lower clamping seat 41 is a rectangular seat with a semi-waist shape at the middle position of the top, the upper clamping seat is a corresponding rectangular seat with a corresponding semi-waist circular hole at the bottom, and the two are fastened by bolts after being butted up and down.
In order to ensure the accurate concentricity of the assembled upper clamping seat and the assembled lower clamping seat, the upper clamping seat and the lower clamping seat are firstly processed into the same qualified part and then are divided into two parts by linear cutting, namely, two semi-waist-shaped holes of the upper clamping seat and the lower clamping seat are formed by cutting a complete waist-shaped hole, and a mounting hole for mounting a bolt between the two parts is formed by processing once and then is divided into two sections.
The bottom surface of the lower clamping seat 42 is welded on the top plate of the clamping seat mounting frame 211 of the outer wall of the lower box body.
The flat grooves 32 of the fixing shafts at the two ends of the high-pressure water jet rotary joint 3 are arranged in the semi-waist circular holes of the lower clamping seat 42, and then the upper clamping seat and the lower clamping seat are connected and fastened through bolts.
The assembly structure of the upper clamping seat, the lower clamping seat and the fixing shaft of the high-pressure water jet rotary joint 3 ensures that the middle section of the high-pressure water jet rotary joint 3 can turn over along with the upper box body device, and the fixing shafts at the two ends cannot rotate.
The drive arrangement 5 that the box overturned on this embodiment adopts the hydro-cylinder, and the both ends of hydro-cylinder set up the hinge ring respectively.
When the descaling box device is assembled, an upper descaling box device and a lower descaling box device are assembled respectively, the lower descaling box device is fixed on the basis of a roller way device through a box body mounting plate and a fastener on the outer wall of a lower box body, then the upper descaling box device is buckled on the lower box body, a high-pressure water jet rotary joint of the upper descaling box device is clamped at the position of a semi-kidney-shaped hole of a lower clamping seat, the upper clamping seat and the lower clamping seat are fixed through a bolt, finally a hinge ring at the end of a piston rod of an oil cylinder is hinged with a hinge lug at the upper part of the side wall of the upper box body through a hinge shaft, and a hinge ring at the end of a cylinder sleeve is hinged with the mounting seat (fixed according to the specific site position) through a hinge shaft.
When the steel billet is descaled by the descaling box device and is stopped due to faults, the upper box device can be overturned to be quickly separated from the lower box body through the stretching of the oil cylinder, so that the steel billet can be quickly lifted away from the conveying pipeline, the time is saved, and the labor intensity of field workers is reduced.
After the fault is eliminated, the upper box body device can be quickly buckled on the lower box body through the telescopic motion of the oil cylinder.
When the steel billet is descaled, the top surface and the side surface of the descaling box device are closed surfaces, so that water and iron oxide scale can be prevented from splashing, and falling scale can be recycled by taking the bottom surface of the descaling box device as the opening side.
Claims (10)
1. The utility model provides a descaling box device that can overturn, includes high pressure water jet rotary joint, its characterized in that: the device also comprises an upper box body device, a lower box body device and a driving device;
the upper box body device comprises an upper box body and an upper descaling ring fixed on the upper box body;
the lower box body device comprises a lower box body and a lower descaling pipe component fixed on the lower box body;
the upper box body is buckled above the lower box body;
the two ends of the high-pressure water jet rotary joint are symmetrically provided with clamping seats, one side of the lower box body is connected with a corresponding clamping seat mounting frame, and the clamping seats are fixed on the clamping seat mounting frame;
one end of the high-pressure water jet rotary joint is provided with a high-pressure water inlet joint for supplying water to the upper descaling ring; one end of the lower descaling pipe assembly is a water inlet end and is connected with a high-pressure water supply pipe;
the action end of the driving device is hinged with the upper part of one side wall of the upper box body to drive the upper box body device to turn over and open;
the steel billet passes through the other pair of side walls of the upper box body, and the periphery of the steel billet is sprayed and descaled through the upper descaling ring and the lower descaling pipe.
2. The reversible descaling-bin apparatus of claim 1, wherein: the upper box body is a hollow cuboid with a lower opening, the upper part of the connecting side of the driving device is provided with a hinged lug seat, the upper part of the other pair of side walls is connected with a lifting lug convenient for the lifting of the upper box body, and the lower part of the other pair of side walls is provided with a notch through which a steel billet passes.
3. The reversible descaling-bin apparatus of claim 2, wherein: the upper descaling ring is a U-shaped ring matched with the inner cavity of the upper tank body and comprises two vertical water collecting pipes and two transverse water collecting pipes, the two vertical water collecting pipes are arranged in a bilateral symmetry mode, the two ends of each transverse water collecting pipe are dead ends and are connected to the upper ends of the two vertical water collecting pipes, descaling spray heads are connected to the opposite sides of the two vertical water collecting pipes and the lower sides of the transverse water collecting pipes, and the descaling spray heads are used for spraying and descaling the left side, the right side and the upper side of a steel billet respectively.
4. The reversible descaling-bin apparatus of claim 3, wherein: the lower end of the vertical water collecting pipe is connected with a vertical plug, and the upper end of the vertical water collecting pipe is connected with the transverse water collecting pipe in a splicing and welding mode; a water inlet pipe is connected to the outer side of the bottom of one of the vertical water collecting pipes, and a corresponding abdicating groove is formed in the upper box body corresponding to the water inlet pipe; the outer side of the vertical water collecting pipe is welded with the side wall of the upper box body, and the upper side and two ends of the horizontal water collecting pipe are welded with the top surface of the upper box body.
5. The reversible descaling-bin apparatus of claim 4, wherein: the lower box body is a square surrounding frame with an upper opening and a lower opening, the plane size of the lower box body is the same as that of the upper box body, the clamping seat mounting frame is connected to the upper parts of the side walls of the lower box body, corresponding to the hinged lug seats, connected with the upper box body, and the other pair of side walls of the lower box body is connected with lifting lugs for lifting; the lower part of the side wall of the lower box body is connected with a box body fixing plate, and the lower box body is arranged on the foundation through the box body fixing plate and a fastening piece.
6. The reversible descaling-bin apparatus of claim 5, wherein: the lower descaling pipe assembly comprises a lower descaling pipe and a mounting frame, the lower descaling pipe comprises a horizontal water inlet pipe, a horizontal water collecting pipe, a horizontal connecting pipe and a horizontal plug which are sequentially connected, the upper side of the horizontal water collecting pipe is connected with a descaling spray head, and the horizontal water inlet pipe, the horizontal connecting pipe and the horizontal water collecting pipe are all in a plug-in and welding connection mode; the mounting bracket includes the channel-section steel and welds the mounting panel in its lower extreme, and two mounting brackets use the channel-section steel to pass the mounting bracket respectively with opening vertical symmetrical arrangement outwards, horizontal inlet tube and horizontal connecting pipe's outer end.
7. The reversible descaling-bin apparatus of claim 6, wherein: the lower descaling pipes are arranged in parallel under the transverse water collecting pipes, mounting holes are formed in the corresponding side walls of the lower box body corresponding to the mounting positions of the lower descaling pipes, bearing plates are arranged on the outer sides of the side walls, and the mounting plates are connected and fastened with the bearing plates through bolts.
8. The reversible descaling-bin apparatus of claim 1, wherein: the high-pressure water jet rotary joint is characterized in that annular grooves are symmetrically formed in rotating shafts at two ends of the high-pressure water jet rotary joint, and the mounting hole in the clamping seat, which is used for being mounted on the high-pressure water jet rotary joint, is a vertical waist-shaped hole.
9. The reversible descaling-bin apparatus of claim 7, wherein: and the horizontal water collecting pipe, the vertical water collecting pipe and the horizontal water collecting pipe are provided with inclination angles opposite to the advancing direction of the steel billet, and the adjacent descaling spray heads of the water collecting pipes deflect at an angle in the same direction so as to avoid the interference of sprayed water flow.
10. The reversible descaling-bin apparatus of claim 2, wherein: the driving device is a hydraulic cylinder or an electric push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921462085.XU CN210936470U (en) | 2019-09-04 | 2019-09-04 | Descaling box device that can overturn |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921462085.XU CN210936470U (en) | 2019-09-04 | 2019-09-04 | Descaling box device that can overturn |
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| CN210936470U true CN210936470U (en) | 2020-07-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110548770A (en) * | 2019-09-04 | 2019-12-10 | 湖南湘江水力环保设备科技有限公司 | Descaling box device that can overturn |
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2019
- 2019-09-04 CN CN201921462085.XU patent/CN210936470U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110548770A (en) * | 2019-09-04 | 2019-12-10 | 湖南湘江水力环保设备科技有限公司 | Descaling box device that can overturn |
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