CN220496543U - Slurry shield pipeline breaker - Google Patents
Slurry shield pipeline breaker Download PDFInfo
- Publication number
- CN220496543U CN220496543U CN202321970491.3U CN202321970491U CN220496543U CN 220496543 U CN220496543 U CN 220496543U CN 202321970491 U CN202321970491 U CN 202321970491U CN 220496543 U CN220496543 U CN 220496543U
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- box
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- breaker
- bypass
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- 239000002002 slurry Substances 0.000 title claims abstract description 129
- 239000004575 stone Substances 0.000 claims abstract description 35
- 238000005192 partition Methods 0.000 claims abstract description 29
- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 238000007599 discharging Methods 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 9
- 238000000638 solvent extraction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 12
- 230000009471 action Effects 0.000 description 8
- 238000000926 separation method Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 230000005641 tunneling Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Crushing And Pulverization Processes (AREA)
Abstract
The utility model discloses a slurry shield pipeline crusher, which comprises a box assembly, a partition plate and a pipeline assembly, wherein the partition plate is used for partitioning the box assembly into a crushing box and a bypass box for discharging slurry, a crushing mechanism for crushing stones is arranged in the crushing box, an overhaul port for conveniently overhauling the crushing mechanism is arranged on the crushing box, and a partition valve for enabling the crushing box to be connected with the bypass box in an on-off mode is arranged on the partition plate; the pipeline assembly comprises a main pulp inlet pipe and an auxiliary pulp inlet pipe communicated with the main pulp inlet pipe, the main pulp inlet pipe is communicated with a pulp inlet of the crushing box, a first control valve for controlling the on-off of the pulp inlet of the crushing box is arranged on the main pulp inlet pipe, the auxiliary pulp inlet pipe is communicated with a pulp inlet of the bypass box, and a second control valve for controlling the on-off of the pulp inlet of the bypass box is arranged on the auxiliary pulp inlet pipe. In combination, the slurry shield pipeline crusher is in a double-channel form formed by combining the crushing box and the bypass box, has a mode switching function, and can realize maintenance without shutdown.
Description
Technical Field
The utility model relates to the technical field of tunnel construction equipment, in particular to a slurry shield pipeline crusher.
Background
In order to meet the rapid development requirement of urban rails, tunnel shield construction technology is increasingly applied, and shield machine technology applied to tunnel construction is rapidly developed. The existing shield machine has the advantages of safe and efficient construction, accurate control, reliable quality, environmental protection and the like, and is widely applied to the projects of subway tunnels, highway tunnels, river-crossing tunnels, sea-crossing tunnels, diversion sewage tunnels and the like.
In complex stratum construction, in order to avoid blocking a slurry discharge pump and a pipeline by large-particle-size sand and stone and to cause stagnation and discharge of a slurry circulation system, a crushing device or a sand and stone collecting device is generally arranged in a pipeline at the front end of the slurry discharge pump, and a crusher is generally arranged in front of the slurry discharge pipeline in the prior art to crush and discharge the rock, soil and sand and stone together with slurry. Wherein, the breaker is because of submergence in mud, and the operating mode is abominable, and the fault rate is high, and the maintenance degree of difficulty is big, and the in-process of maintenance needs to stop operation equipment moreover, and the mud discharging work of the interior mud of this in-process to the tunnel also is to pause thereupon, just can restart after the breaker maintenance is accomplished, has influenced the mud discharging efficiency of mud in the tunnel like this to the going on of tunneling work has been influenced.
Disclosure of Invention
The utility model provides a slurry shield pipeline crusher, which aims to solve the technical problem of how to maintain and overhaul the crusher without stopping slurry discharge.
The utility model provides a slurry shield pipeline crusher, which comprises a box assembly, a division plate and a pipeline assembly, wherein the division plate is used for dividing the box assembly into a crushing box and a bypass box for discharging slurry, a crushing mechanism for crushing stone is arranged in the crushing box, an overhaul port for facilitating overhaul of the crushing mechanism is arranged on the crushing box, and a division valve for enabling the crushing box to be connected with the bypass box in an on-off mode is arranged on the division plate; the pipeline assembly comprises a main pulp inlet pipe and an auxiliary pulp inlet pipe communicated with the main pulp inlet pipe, wherein the main pulp inlet pipe is communicated with a pulp inlet of the crushing box, a first control valve for controlling the on-off of the pulp inlet of the crushing box is arranged on the main pulp inlet pipe, and the auxiliary pulp inlet pipe is communicated with the pulp inlet of the bypass box and is provided with a second control valve for controlling the on-off of the pulp inlet of the bypass box.
Further, the crushing mechanism comprises a driving piece arranged on the crushing box and a crushing disc connected with a driving rod of the driving piece, and the driving piece is used for driving the crushing disc to rotate so as to crush stones mixed in slurry.
Further, a supporting box is arranged on the crushing box, the driving rod penetrates through the supporting box, and a bearing for supporting the driving rod is arranged in the supporting box.
Further, crushing teeth are arranged on the inner side wall of the crushing box and are used for being matched with the crushing disc to crush stones mixed in slurry.
Further, the crushing disc is an eccentric conical disc.
Further, the driving piece is a hydraulic motor, and a torque detection device is arranged on the driving rod and used for detecting the torque of the driving rod.
Further, a filter piece for filtering stone materials mixed in the slurry is arranged on the auxiliary slurry inlet pipe, and the filter piece is positioned at the communication position of the auxiliary slurry inlet pipe and the main slurry inlet pipe.
Further, a cleaning device for cleaning the crushing box is arranged on the crushing box.
Further, a slurry outlet of the bypass box is communicated with a slurry discharge pump for pumping slurry.
Further, the partition valve, the first control valve and the second control valve are all electronic valves.
The utility model has the following beneficial effects:
according to the slurry shield pipeline crusher, the crushing box and the bypass box are formed by arranging the partition plate in the box body, the partition valve is arranged on the partition plate to enable the crushing box to be communicated with the bypass box in an on-off mode, and the path of slurry entering the box body is controlled by the first control valve arranged on the main slurry inlet pipe and the second control valve arranged on the auxiliary slurry inlet pipe, so that the crushing mechanism in the crushing box can still perform slurry discharging operation through the bypass box after crushing is stopped.
When the method is implemented, in the tunneling process, under the conditions that the stratum environment is severe and excessive stones are mixed in the slurry, the slurry shield pipeline crusher operates in a crushing mode, at the moment, the first control valve is opened, the second control valve is closed, the separation valve is opened, the slurry mixed with stones enters the crushing box from the main slurry inlet pipeline, the stones are crushed under the action of the crushing mechanism, then the slurry flows into the bypass box through the separation valve, and finally the slurry is discharged under the action of the slurry discharge pump arranged at the slurry outlet of the bypass box; when the stratum condition is good and no stone is mixed in the slurry, the slurry shield pipeline crusher operates in a bypass mode, at the moment, the first control valve is closed, the second control valve is opened, the separation valve is closed, the slurry flows into the main slurry inlet pipe and then flows into the auxiliary slurry inlet pipe under the blocking of the first control valve, then flows into the bypass box, and finally the slurry is discharged under the action of the slurry discharge pump arranged at the slurry outlet of the bypass box; when the crushing mechanism breaks down and needs to be maintained, the first control valve is closed, the second control valve is opened, the partition valve is opened at the same time, the crushing mechanism idles to enable slurry in the crushing box to be discharged, then the crushing mechanism stops working, the partition valve is closed, the slurry flows into the bypass box through the auxiliary slurry inlet pipe, finally the slurry is discharged under the action of the slurry discharge pump arranged at the slurry outlet of the bypass box, and meanwhile, an overhauler can enter the crushing box through the overhauling hole to maintain the crushing mechanism, so that maintenance and overhaul of the crusher are realized under the condition that slurry discharge is not stopped.
In conclusion, the slurry shield pipeline crusher of the embodiment is in a double-channel mode, has a mode switching function, and can realize maintenance without shutdown. In the crushing mode, large-particle-size stone enters a crushing box, is crushed by a crushing mechanism, falls into a bypass box from a rear channel of the crushing box through a separation valve, and is discharged from a slurry outlet of the bypass box; when the stratum is better or the broken tooth needs to be overhauled, the separation flashboard is closed, the first control valve is closed, the second control valve is opened, the slurry is discharged through the bypass box, and at the moment, the inside of the broken box can be overhauled unaffected, namely, the shield is overhauled on the slurry shield pipeline breaker without stopping.
In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The present utility model will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is a schematic structural view of a slurry shield pipe breaker according to a preferred embodiment of the present utility model;
legend description:
100. a box assembly; 101. a partition plate; 102. a partition valve; 103. a crushing box; 104. a cleaning device; 105. an access opening; 106. crushing teeth; 107. a bypass box; 108. a slurry pump;
200. a main slurry inlet pipe; 201. a first control valve;
300. an auxiliary pulp inlet pipe; 301. a second control valve; 302. a filter;
400. a driving member; 401. a driving rod; 402. a crushing disc;
500. a supporting box; 501. and (3) a bearing.
Detailed Description
Embodiments of the utility model are described in detail below with reference to the attached drawing figures, but the utility model can be practiced in a number of different ways, as defined and covered below.
As shown in fig. 1, the slurry shield pipeline breaker of the embodiment comprises a tank assembly 100, a partition plate 101 and a pipeline assembly, wherein the partition plate 101 is used for dividing the tank assembly 100 into a breaking tank 103 and a bypass tank 107 for discharging slurry, a breaking mechanism for breaking stones is arranged in the breaking tank 103, an overhaul port 105 for facilitating overhaul of the breaking mechanism is arranged on the breaking tank 103, and a partition valve 102 for enabling the breaking tank 103 to be connected with the bypass tank 107 in an on-off manner is arranged on the partition plate 101; the pipeline assembly comprises a main pulp inlet pipe 200 and an auxiliary pulp inlet pipe 300 communicated with the main pulp inlet pipe 200, the main pulp inlet pipe 200 is communicated with a pulp inlet of the crushing box 103, a first control valve 201 used for controlling the on-off of the pulp inlet of the crushing box 103 is arranged on the main pulp inlet pipe 200, the auxiliary pulp inlet pipe 300 is communicated with a pulp inlet of the bypass box 107, and a second control valve 301 used for controlling the on-off of the pulp inlet of the bypass box 107 is arranged on the auxiliary pulp inlet pipe 300.
In this embodiment, access port 105 is located the below of the inlet of broken case 103, and access port 105 department is provided with the access panel, and the access panel passes through the bolt fastening in broken case 103, is furnished with manual ball valve on the access panel, can open manual ball valve before the maintenance, after carrying out the pressure release in the box to the convenient access panel of opening. The partition plate 101 may be fixed in the case assembly 100 by welding, or may be detachably fixed in the case assembly 100 by bolts. To facilitate the observation of the operation in the crushing tank 103 and the bypass tank 107. A visual window for easy observation may be provided on both the wall of the crushing tank 103 and the wall of the bypass tank 107.
In the slurry shield pipeline crusher, the crushing box 103 and the bypass box 107 are formed by arranging the partition plate 101 in the box body, the partition valve 102 is arranged on the partition plate 101 so that the crushing box 103 and the bypass box 107 can be communicated with each other, and then the path of slurry entering the box body is controlled by the first control valve 201 arranged on the main slurry inlet pipe 200 and the second control valve 301 arranged on the auxiliary slurry inlet pipe 300, so that the slurry discharging work can be performed through the bypass box 107 after the crushing mechanism in the crushing box 103 stops crushing.
In the concrete implementation, in the tunneling process, when the stratum environment is bad and excessive stones are mixed in the slurry, the slurry shield pipeline crusher operates in a crushing mode, at the moment, the first control valve 201 is opened, the second control valve 301 is closed, the partition valve 102 is opened, the slurry mixed with stones enters the crushing box 103 from the main slurry inlet pipe 200, the stones are crushed under the action of the crushing mechanism, then the slurry flows into the bypass box 107 through the partition valve 102, and finally the slurry is discharged under the action of the slurry discharge pump 108 arranged at the slurry outlet of the bypass box 107; when the stratum condition is good and no stone is mixed in the slurry, the slurry shield pipeline breaker operates in a bypass mode, at the moment, the first control valve 201 is closed, the second control valve 301 is opened, the separation valve 102 is closed, the slurry flows into the main slurry inlet pipe 200 and then flows into the auxiliary slurry inlet pipe 300 under the blocking of the first control valve 201, then flows into the bypass box 107, and finally the slurry is discharged under the action of the slurry discharge pump 108 arranged at the slurry outlet of the bypass box 107; when the crushing mechanism breaks down and needs to be maintained, the first control valve 201 is closed, the second control valve 301 is opened, the partition valve 102 is opened, the crushing mechanism idles to enable slurry in the crushing box 103 to be discharged, then the crushing mechanism stops working, the partition valve 102 is closed, the slurry flows into the bypass box 107 through the auxiliary slurry inlet pipe 300, finally the slurry is discharged under the action of the slurry discharge pump 108 arranged at the slurry outlet of the bypass box 107, and meanwhile, an overhauler can enter the crushing box 103 through the overhauling hole 105 to maintain the crushing mechanism, so that maintenance and overhaul of the crusher are realized under the condition that slurry discharge is not stopped.
In conclusion, the slurry shield pipeline crusher of the embodiment is in a double-channel mode, has a mode switching function, and can realize maintenance without shutdown. In the crushing mode, large-particle-size stone enters the crushing box 103, is crushed by the crushing mechanism, falls into the bypass box 107 from a rear channel of the crushing box 103 through the partition valve 102, and is discharged from a slurry outlet of the bypass box 107; when the stratum is good or the crushing teeth 106 need to be overhauled, the separation flashboard is closed, the first control valve 201 is closed, the second control valve 301 is opened, and the slurry is discharged through the bypass box 107, so that the inside of the crushing box 103 can be overhauled without being influenced.
Further, the crushing mechanism comprises a driving member 400 arranged on the crushing box 103 and a crushing disc 402 connected with a driving rod 401 of the driving member 400, wherein the driving member 400 is used for driving the crushing disc 402 to rotate so as to crush stone materials mixed in slurry.
In this embodiment, the crushing disc 402 is a conical disc, and is located in the crushing box 103, and the driving member 400 is used to rotate the crushing disc 402. After the stone material entering the crushing box 103 touches the crushing disc 402, the crushing disc 402 drives the stone material to move, and the stone material is crushed under the extrusion of the crushing disc 402.
Further, a supporting box 500 is disposed on the crushing box 103, the driving rod 401 penetrates through the supporting box 500, and a bearing 501 for supporting the driving rod 401 is disposed in the supporting box 500. In this embodiment, the driving rod 401 is supported by the bearing 501 in the supporting box 500, on one hand, the supporting force to the crushing disc 402 is shared, on the other hand, the driving rod 401 can rotate more stably by the bearing 501, and the supporting box 500 has an isolating function to protect the driving rod 401, and the slurry in the crushing box 103 is placed on the driving rod to affect the operation of the driving rod 401.
Further, crushing teeth 106 are provided on the inner side wall of the crushing box 103, and the crushing teeth 106 are used for being matched with the crushing disc 402 to crush stone materials mixed in slurry. In this embodiment, crushing teeth 106 may be provided on both side walls and on the inner wall of the top end of the crushing box 103, and the crushing teeth 106 cooperate with the crushing disc 402, so that stone material mixed in the slurry can be crushed by the crushing teeth 106 and the crushing disc 402.
Further, the breaker plate 402 is an eccentric conical plate.
In this embodiment, after the eccentric cone disc is adopted by the crushing disc 402, the crushing effect is better, the impact resistance is strong, compared with the concentric cone crushing disc 402, the gap between the eccentric cone disc and the crushing teeth 106 is different, and when crushing, the crushing disc not only has the extrusion force on stones, but also has the impact force formed when the eccentric cone disc rotates, and the crushing effect is better.
Further, the driving member 400 is a hydraulic motor, and the driving rod 401 is provided with a torque detecting device, where the torque detecting device is configured to detect the torque of the driving rod 401, so as to determine the working state of the driving rod 401.
In this embodiment, the driving member 400 is a hydraulic motor, and has functions of torque detection and self-adjusting and escaping. When the crushing mechanism operates, a torque detection device is arranged on the driving rod 401 to detect the torque condition in real time, and when the crushing working condition is bad or the crushing load is large and reaches an alarm value, and the rotating speed of the driving rod 401 in 2S is 0, the condition that the rotation of the crushing disc 402 is limited and blocked by stone materials is indicated to enter a escaping mode, the positive rotating speed is slowly reduced to 0, then the reverse rotating speed is slowly reversed, and then the reverse rotating speed is slowly reduced to 0; after repeating for 3 times, the crushing mode is entered again.
Further, a filter 302 for filtering stone materials mixed in the slurry is disposed on the auxiliary slurry inlet pipe 300, and the filter 302 is located at a communication position between the auxiliary slurry inlet pipe 300 and the main slurry inlet pipe 200. In this embodiment, the filtering member 302 is an elastic filter screen, and can filter stone materials mixed in the slurry, so that the stone materials can be temporarily stored in the main slurry inlet pipe 200, and after the crushing mode is restarted, the stone materials temporarily stored in the main slurry inlet pipe 200 can be discharged into the crushing box 103 for crushing.
Further, a cleaning device 104 for cleaning the crushing box 103 is provided on the crushing box 103. In this embodiment, the cleaning device 104 comprises a flushing port provided at the top of the crushing tank 103 and a spray gun provided at the flushing port. When the pulp inlet of the crushing box 103 is blocked, the pulp inlet can be aligned for flushing by a spray gun.
Further, a slurry outlet of the bypass tank 107 is communicated with a slurry discharge pump 108 for pumping slurry.
In this embodiment, the slurry discharge pump 108 provided at the slurry outlet of the bypass tank 107 provides power for discharging slurry, and in particular, the slurry in the bypass tank 107 can be extracted.
Further, the partition valve 102, the first control valve 201, and the second control valve 301 are electronic valves. In this embodiment, the partition valve 102, the first control valve 201 and the second control valve 301 are electronic valves, so that control by an electrical signal can be realized, wherein the partition valve 102 is located inside the box assembly 100, and the electronic valves are used for controlling opening and closing, which is convenient and efficient.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A slurry shield pipe breaker comprising:
a tank assembly (100);
the separating plate (101), the separating plate (101) is used for separating the box assembly (100) into a crushing box (103) and a bypass box (107) for discharging slurry, a crushing mechanism for crushing stones is arranged in the crushing box (103), an overhaul port (105) for facilitating overhaul of the crushing mechanism is arranged on the crushing box (103), and a separating valve (102) for enabling the crushing box (103) to be connected with the bypass box (107) in an on-off mode is arranged on the separating plate (101);
the pipeline assembly comprises a main pulp feeding pipe (200) and an auxiliary pulp feeding pipe (300) communicated with the main pulp feeding pipe (200), wherein the main pulp feeding pipe (200) is communicated with a pulp feeding port of a crushing box (103), a first control valve (201) used for controlling the on-off of the pulp feeding port of the crushing box (103) is arranged on the main pulp feeding pipe (200), the auxiliary pulp feeding pipe (300) is communicated with the pulp feeding port of a bypass box (107), and a second control valve (301) used for controlling the on-off of the pulp feeding port of the bypass box (107) is arranged on the auxiliary pulp feeding pipe (300).
2. A slurry shield pipe breaker according to claim 1, characterized in that the breaking mechanism comprises a drive member (400) arranged on the breaking box (103) and a breaking disc (402) connected to a drive rod (401) of the drive member (400), the drive member (400) being adapted to drive the breaking disc (402) in rotation for breaking stone entrained in the slurry.
3. The slurry shield pipe breaker according to claim 2, characterized in that a supporting box (500) is provided on the breaker box (103), the driving rod (401) penetrates the supporting box (500) and a bearing (501) for supporting the driving rod (401) is provided in the supporting box (500).
4. A slurry shield pipe breaker according to claim 2, characterized in that the breaker box (103) is provided with breaker teeth (106) on the inner side wall, which breaker teeth (106) are adapted to cooperate with the breaker plate (402) for breaking stone entrained in the slurry.
5. The slurry shield pipe breaker of claim 2 wherein said breaker plate (402) is an eccentric conical plate.
6. A slurry shield pipe breaker according to claim 2, characterized in that the driving member (400) is a hydraulic motor, and that the driving rod (401) is provided with torque detecting means for detecting the torque of the driving rod (401).
7. The slurry shield pipeline breaker according to any one of claims 1 to 6, characterized in that a filter (302) for filtering stone entrained in the slurry is provided on the secondary slurry inlet pipe (300), the filter (302) being located at a communication position of the secondary slurry inlet pipe (300) and the primary slurry inlet pipe (200).
8. Slurry shield pipe breaker according to any of claims 1-6, characterized in that the breaker box (103) is provided with a cleaning device (104) for cleaning the breaker box (103).
9. The slurry shield pipeline breaker according to any one of claims 1-6, characterized in that the outlet of the bypass box (107) is connected with a slurry pump (108) for pumping slurry.
10. The slurry shield pipe breaker according to any one of claims 1 to 6, wherein said partition valve (102), said first control valve (201) and said second control valve (301) are all electronic valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321970491.3U CN220496543U (en) | 2023-07-25 | 2023-07-25 | Slurry shield pipeline breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321970491.3U CN220496543U (en) | 2023-07-25 | 2023-07-25 | Slurry shield pipeline breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220496543U true CN220496543U (en) | 2024-02-20 |
Family
ID=89882276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321970491.3U Active CN220496543U (en) | 2023-07-25 | 2023-07-25 | Slurry shield pipeline breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220496543U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118513107A (en) * | 2024-06-25 | 2024-08-20 | 中铁十四局集团装备有限公司 | Energy-saving crusher |
-
2023
- 2023-07-25 CN CN202321970491.3U patent/CN220496543U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118513107A (en) * | 2024-06-25 | 2024-08-20 | 中铁十四局集团装备有限公司 | Energy-saving crusher |
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