CN2889984Y - Fully-hydraulic traveling-driven type breaking dredging-machine - Google Patents
Fully-hydraulic traveling-driven type breaking dredging-machine Download PDFInfo
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- CN2889984Y CN2889984Y CN 200620049920 CN200620049920U CN2889984Y CN 2889984 Y CN2889984 Y CN 2889984Y CN 200620049920 CN200620049920 CN 200620049920 CN 200620049920 U CN200620049920 U CN 200620049920U CN 2889984 Y CN2889984 Y CN 2889984Y
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- breaker roll
- hydraulic
- links
- walking
- control system
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Abstract
The utility model discloses a fully-hydraulic traveling-driven type breaking dredging-machine, which comprises a crushing roller, a crushing roller transmission mechanism, a traveling transmission mechanism, a traveling device, a hydraulic control system, a machine frame and a rail. The crushing roller transmission mechanism and the traveling transmission mechanism are arranged on the machine frame, and the traveling device comprises a front wheel and a rear wheel. The crushing rollers are supported at both sides of the machine frame, and the hydraulic control system fixed on the machine frame comprises a crushing roller hydraulic control system and a traveling hydraulic control system. The traveling device is connected with the traveling hydraulic control system by the traveling transmission mechanism comprising a traveling hydraulic motor and a transmission shaft, and the traveling hydraulic motor is connected with the traveling device by the transmission shaft. The crushing roller is connected with the crushing roller hydraulic control system by the crushing roller transmission mechanism comprising two crushing roller hydraulic motors arranged at both ends of the crushing roller, and the crushing roller hydraulic motors are connected with the crushing roller by a coupling. The utility model has simple structure, low equipment cost, low failure rate and strong advancing force.
Description
Technical field
The utility model is mainly concerned with the clear equipment of dredging that coal grate under a kind of train coal tipper and automobile are subjected to grate on coal grate on the coalpit or other hoppers between unloading coal, and refers in particular to a kind of completely hydraulically driven breaking dredger.
Background technology
Measure in the big enterprise with coal (or other loose unpacked materials) in industries such as electric power, metallurgy, usually, advance the coal of factory by train or vehicular transport and all will do to sieve for the first time through the coal grate.In the past, residued in foreign material on the coal grate such as a fat person's coal after the screening, gangue, straw rope, woven bag etc. are all by artificial treatment.Along with the development and progress of society, the labor cleaning under this harsh environment can not reach modern production requirement and usefulness and beat, and manual operations will be replaced by dynamical machinery and equipment.So the clear machine of dredging of various types arises at the historic moment.
At present, being used to clear up coal grate under the train coal tipper and automobile is subjected between unloading coal the clear equipment of dredging of grate on coal grate on the coalpit or other hoppers that two characteristics are arranged: characteristics one, the type of drive of breaker roll and running gear (two wheel drive or four wheel drive) is the mechanical type transmission, its each running position all will be finished by a series of parts such as motor, reductor, coupler respectively, and adopts this type of drive to cause that clear overall weight of dredging equipment is big, mechanism is complicated, cost is high, fault rate is high.Characteristics two: the power of advancing of equipment walking realizes by the force of rolling friction between steel wheel and the rail rail level.Because friction force equals gravity * friction coefficient (0.05), increase friction force, have only by increasing equipment gravity and realize, and one ton of the every increase of conducting oneself with dignity, its friction force only increases 500N.Therefore, the equipment power of advancing is restricted, and when equipment runs into slightly bigger resistance, very easily skids.The traveling gear of domestic existing all similar devices is the rolling friction that relies between steel wheel (comprising two-wheel drive or four wheel drive) and the rail and advances, so very easily skid, water is especially arranged on rail level, when earth or wet coal and running resistance are big slightly, just skid, at this moment, machine can only be parked on the coal grate, must not advance, must not move back, the tipper operation of can not normally unloading coal.In the domestic existing equipment manual setter is not set all, machine is skidding or parking and electrical equipment when being out of order, and machine can not be return machine room, influences discharge operation.
The utility model content
The technical problems to be solved in the utility model just is: at the deficiency that prior art exists, the utility model provides a kind of simple in structure, equipment manufacturing cost is low, fault rate is low, the power of advancing is big completely hydraulically driven breaking dredger.
In order to solve the problems of the technologies described above, the solution that the utility model proposes is: a kind of completely hydraulically driven breaking dredger, it comprises breaker roll, breaker roll transmission device, walking transmission mechanism, running gear, hydraulic control system, frame and track.Breaker roll transmission device and walking transmission mechanism are arranged on the frame, breaker roll is supported in the both sides of frame, running gear comprises the bottom that is arranged at frame and is supported in front-wheel and trailing wheel on the track, it is characterized in that: described hydraulic control system is fixed on the frame, and it comprises breaker roll hydraulic control system and walking hydraulic control system.Running gear links to each other with the walking hydraulic control system by walking transmission mechanism, and described walking transmission mechanism comprises walking HM Hydraulic Motor and transmission shaft, and the walking HM Hydraulic Motor links to each other with running gear by transmission shaft; Breaker roll links to each other with the breaker roll hydraulic control system by the breaker roll transmission device, and this breaker roll transmission device comprises two breaker roll HM Hydraulic Motor that place the breaker roll two ends respectively, and the breaker roll HM Hydraulic Motor links to each other with breaker roll by coupler.
Described breaker roll hydraulic control system comprises motor, Hydraulic Pump, fuel tank, by pass valve, filter, change-over valve, governor valve and back pressure valve; The axle head that advances of Hydraulic Pump links to each other with motor, the input port of Hydraulic Pump links to each other with fuel tank by filter, a delivery port of Hydraulic Pump links to each other with HM Hydraulic Motor with governor valve by change-over valve successively, another delivery port of Hydraulic Pump links to each other with fuel tank by by pass valve, and the oil outlet place of HM Hydraulic Motor is provided with back pressure valve.
Described walking hydraulic control system comprises motor, Hydraulic Pump, by pass valve, filter, change-over valve, governor valve and pressure relay.The axle head that advances of Hydraulic Pump links to each other with motor, and the input port of Hydraulic Pump links to each other with fuel tank by filter, and a delivery port of Hydraulic Pump links to each other with HM Hydraulic Motor with governor valve by change-over valve successively, and another delivery port of Hydraulic Pump links to each other with fuel tank by by pass valve; Pressure relay is arranged between governor valve and the change-over valve.
Described breaker roll comprises broken roller, connection seat, crushing head and cutting blade.Be connected with connection seat on the excircle of broken roller, crushing head is installed in a side of connection seat, and its head places the top of connection seat, and the revolution cutting blade is anchored on the connection seat opposite side, be provided with fixed blade in revolution cutting blade corresponding position, described fixed blade is installed in fixedly on the tool rest.
Described track comprises rail and bearing pin, and the rail middle part has the hole, is inserted with bearing pin in the hole, and a side of described trailing wheel is the light face, and another side is a pin gear, the pin gear of rear walking wheel end face and the engagement of track upper pin.
Compared with prior art, advantage of the present utility model just is:
1, completely hydraulically driven breaking dredger of the present utility model adopts the mode that full hydraulic drives, breaker roll transmission device and walking transmission mechanism all adopt the HM Hydraulic Motor transmission, and link to each other with hydraulic control system, two cover hydraulic efficiency pressure systems can be finished all the parts transmissions of this machine, therefore it is simple, compact to have device structure, characteristics in light weight, that equipment manufacturing cost is low;
2, the HM Hydraulic Motor of the utility model completely hydraulically driven breaking dredger directly links to each other with S. A., has reduced retarder in the mechanical drive, coupler, and parts such as drg, so equipment failure rate is low;
3, rear walking wheel one side of completely hydraulically driven breaking dredger of the present utility model has the pin tooth, rail is provided with bearing pin, the pin tooth is stirred the bearing pin rotation during equipment walking, has increased the power of advancing greatly, has changed mechanical drive and has relied on the present situation that increases equipment self-weight and increase the power of advancing.Because bearing pin directly is installed in the track middle part, saved key seat again, reduced the wearing and tearing that cause to pin gear because of the long-pending coal of key seat, therefore walking is more steady, and maintenance load is littler, and service life of equipment is longer.
Description of drawings
Fig. 1 is the schematic top plan view of the utility model structure;
Fig. 2 is the schematic side view of the utility model structure;
Fig. 3 is the generalized section of the utility model middle orbit;
Fig. 4 is the structural representation of breaker roll actuating device in the utility model;
Fig. 5 is the generalized section of trailing wheel in the utility model running gear;
Fig. 6 is the generalized section of breaker roll in the utility model;
Fig. 7 is the connection diagram of trailing wheel and track in the utility model;
Fig. 8 is a fluid control principle schematic in the utility model.
Marginal data
1, frame 2, breaker roll transmission device 3, walking transmission mechanism
4, breaker roll 5, running gear 6, trailing wheel
7, track 8, hydraulic efficiency pressure system 9, fixed blade
10, track clearing apparatus 11, front-wheel 12, fixing tool rest
21, breaker roll bearing seat 22, breaker roll HM Hydraulic Motor 23, coupler
32, traction avant axle 33, bearing 34, bearing seat
35, walking HM Hydraulic Motor 41, broken roller 42, crushing head
43, cutting blade 44, connection seat 71, bearing pin
72, rail 73, nut 81, breaker roll hydraulic control system
811, motor 812, by pass valve 813, change-over valve
814, governor valve 815, back pressure valve 816, filter
817, fuel tank 818, Hydraulic Pump 82, walking hydraulic control system
821, motor 822, Hydraulic Pump 823, filter
824, by pass valve 825 pressure relayes 826, governor valve
827, change-over valve
The specific embodiment
Below with reference to the drawings and specific embodiments the utility model is described in further details.
As depicted in figs. 1 and 2, completely hydraulically driven breaking dredger of the present utility model, it comprises breaker roll 4, breaker roll transmission device 2, walking transmission mechanism 3, running gear 5, hydraulic control system 8, frame 1 and track 7.Breaker roll transmission device 2 and walking transmission mechanism 3 are arranged on the frame 1, and running gear 5 comprises the bottom that is arranged at frame 1 and be supported in front-wheel 11 and trailing wheel 6 on the track 7 that breaker roll 4 is supported in the both sides of frame 1.Hydraulic control system 8 is fixed on the frame 1, and it comprises breaker roll hydraulic control system 81 and walking hydraulic control system 82.Running gear 5 links to each other with walking hydraulic control system 82 by walking transmission mechanism 3, and walking transmission mechanism 3 comprises walking HM Hydraulic Motor 35 and transmission shaft 32, and walking HM Hydraulic Motor 35 links to each other with running gear 5 by transmission shaft 32; Breaker roll 4 links to each other with breaker roll hydraulic control system 81 by breaker roll transmission device 2, this breaker roll transmission device 2 comprises two breaker roll HM Hydraulic Motor 22 that place breaker roll 41 two ends respectively, and breaker roll HM Hydraulic Motor 22 links to each other with breaker roll 4 by coupler 23.Track clearing apparatus 10 is fixed on the position at the place ahead of trailing wheel 11 or rear, and track 7 is fixed on operation aspect and the coal grate.
As shown in Figure 3, track 7 of the present utility model is a sectional construction, and it comprises rail 72 and bearing pin 71.Rail 72 middle parts have circular hole, and bearing pin 71 is housed in the hole, and bearing pin 71 is lived with shaft shoulder socket joint with rail 72 1 ends, and the other end is fixing with nut 73.The upper surface of rail 72 is the areal of support of front-wheel 11 and trailing wheel 6, and front-wheel 11 is the light face structure of two side ends belt wheel edge, front-wheel 11 walking of rolling on rail 72.As shown in Figure 7, trailing wheel 6 one sides of the present utility model are the light face, and another side is a pin gear, and wheel face rolls on the face of track 7, pin gear on the trailing wheel 6 and bearing pin 71 engaged transmission that are fixed on track 7 middle parts, bearing pin 71 is made engaged transmission with the pin gear of rear walking wheel 6 end faces.
As shown in Figure 4, breaker roll transmission device 2 of the present utility model comprises two breaker roll HM Hydraulic Motor 22, these two breaker roll HM Hydraulic Motor 22 place breaker roll 41 two ends respectively, breaker roll HM Hydraulic Motor 22 links to each other with the axle head of broken roller 41 and links to each other with breaker roll bearing seat 21 by screw by coupler 23, broken 41 of rollers are to be fixed on the frame 1 by bearing seat 21, can drive breaker roll 4 by two breaker roll HM Hydraulic Motor 22 and make rolling-operation.
As shown in Figure 5, walking transmission mechanism 3 of the present utility model comprises walking HM Hydraulic Motor 35, bearing seat 34, transmission shaft 32 and bearing 33, and the HM Hydraulic Motor of wherein walking 35 links to each other with transmission shaft 32 by spline, links to each other with bearing seat 34 by screw again.Front-wheel 11 or trailing wheel 6 are connected with transmission shaft 32 by flat key, and support with bearing 33 and bearing seat 34 at transmission shaft 32 two ends, and bearing seat 34 bolt ups are in frame 1 bottom, and HM Hydraulic Motor 35 can drive front-wheel 11 or trailing wheel 6 is traveling on the track 7 by walking.In specific embodiment, the utility model can adopt the mode of f-w-d, back-wheel drive or four wheel drive as required, promptly by walking HM Hydraulic Motor 35 direct drive front-wheels 11 or trailing wheel 6.
As shown in Figure 6, breaker roll 4 of the present utility model comprises broken roller 41, connection seat 44, crushing head 42 and cutting blade 43.Be connected with connection seat 44 on the excircle of broken roller 41, crushing head 42 is installed in connection seat 44 1 sides by holding screw, its head places connection seat 44 tops, revolution cutting blade 43 is anchored on connection seat 44 opposite sides, be provided with fixed blade 9 in revolution cutting blade 43 corresponding positions, described fixed blade 9 is installed in fixedly on the tool rest 5 (referring to shown in Figure 1).
As shown in Figure 8, hydraulic control system 8 of the present utility model, it comprises breaker roll hydraulic control system 81 and walking hydraulic control system 82.
This breaker roll hydraulic control system 81 comprises motor 811, Hydraulic Pump 818, fuel tank 817, by pass valve 812, filter 816, change-over valve 813, governor valve 814 and back pressure valve 815; The axle head that advances of Hydraulic Pump 818 links to each other with motor 811, the input port of Hydraulic Pump 818 links to each other with fuel tank 817 by filter 816, a delivery port of Hydraulic Pump 818 links to each other with HM Hydraulic Motor 22 with governor valve 814 by change-over valve 813 successively, another delivery port of Hydraulic Pump 818 links to each other with fuel tank 817 by by pass valve 813, and the oil outlet place of broken HM Hydraulic Motor 22 is provided with back pressure valve 815.Motor 811 drives breaker roll Hydraulic Pump 818, make hydraulic oil one loop successively by fuel tank 817, filter 816, Hydraulic Pump 818, change-over valve 813 and governor valve 814, drive HM Hydraulic Motor 22 backs and turn back to fuel tank 817 from change-over valve 813, this loop is used to control the rotating speed and the hand of rotation of breaker roll 4, for guaranteeing system's minimum operating pressure, be provided with back pressure valve 815 at HM Hydraulic Motor 22 oil outlets.Another loop is got back to fuel tank 817 from HM Hydraulic Motor 22 outlets by by pass valve 813, and this loop is used to regulate the operation pressure of breaker roll 4, simultaneously system is played a protective role.
This walking hydraulic control system 82 comprises motor 821, Hydraulic Pump 822, by pass valve 824, filter 823, change-over valve 827, governor valve 826 and pressure relay 825; The axle head that advances of Hydraulic Pump 822 links to each other with motor 821, the input port of Hydraulic Pump 822 links to each other with fuel tank 817 by filter 823, a delivery port of Hydraulic Pump 822 is successively by change-over valve 827 and the governor valve 826 and the HM Hydraulic Motor that links to each other, and another delivery port of Hydraulic Pump 822 links to each other with fuel tank 817 by by pass valve 824; Pressure relay 825 is arranged between governor valve 826 and the change-over valve 827.Motor 821 drives Hydraulic Pump 822 makes hydraulic oil one loop successively by fuel tank 817, filter 823, Hydraulic Pump 822, change-over valve 827, HM Hydraulic Motor 35 and governor valve 826, get back to fuel tank 817 from change-over valve 827, between governor valve 826 and change-over valve 827, be provided with pressure relay 825, this loop is used to control the rotating speed and the direction of running gear 5, when equipment walking is subjected to big resistance, pressure relay 825 actions, equipment is got back to reference position.Another loop hydraulic oil is got back to fuel tank 817 from Hydraulic Pump 822 outlets through by pass valve 824, and when the system works hypertonia, by pass valve 824 is opened, and system is played a protective role.
Be described further as follows to the utility model principle of work in conjunction with the accompanying drawings:
Completely hydraulically driven breaking dredger of the present utility model, with the back-wheel drive is example, the walking hydraulic control system 82 control walking HM Hydraulic Motor 35 of hydraulic control system 8, further drive trailing wheel 11 and on the track 7 that is fixed on operation aspect and the coal grate, walk, thereby the promotion equipment integral moves ahead and retreats.Walking simultaneously, an end is made as pin gear on the trailing wheel 61, and bearing pin 71 then correspondingly is housed on the rail 72, and pin gear on the trailing wheel 6 and bearing pin 71 engaged transmission that are fixed on track 7 middle parts play and strengthened the equipment power of advancing, and reach the effect that the equipment of preventing skids.Breaker roll 4 in the utility model rotates under the driving of two breaker roll HM Hydraulic Motor 24, being fixed on crushing head 42 on the broken roller 41 and cutting blade 43 dashes rigid foreign material such as the coarse coal on the coal castor, gangues under powerful propulsive effort and force of inertia effect and knocks, pushes, cutting blade 43 and fixed blade 9 relativities, shear and tear adhering to flexible foreign material such as straw rope on the breaker roll 4, braid, thereby these foreign material are fallen from the coal castor, reach the purpose of cleaning coal castor.
Claims (8)
1, a kind of completely hydraulically driven breaking dredger, it comprises breaker roll (4), breaker roll transmission device (2), walking transmission mechanism (3), running gear (5), hydraulic control system (8), frame (1) and track (7); Breaker roll transmission device (2) and walking transmission mechanism (3) are arranged on the frame (1), running gear (5) comprises the bottom that is arranged at frame (1) and is supported in front-wheel (11) and trailing wheel (6) on the track (7), breaker roll (4) is supported in the both sides of frame (1), it is characterized in that: described hydraulic control system (8) is fixed on the frame (1), and it comprises breaker roll hydraulic control system (81) and walking hydraulic control system (82); Running gear (5) links to each other with walking hydraulic control system (82) by walking transmission mechanism (3), described walking transmission mechanism (3) comprises walking HM Hydraulic Motor (35) and transmission shaft (32), and walking HM Hydraulic Motor (35) links to each other with running gear (5) by transmission shaft (32); Breaker roll (4) links to each other with breaker roll hydraulic control system (81) by breaker roll transmission device (2), this breaker roll transmission device (2) comprises two breaker roll HM Hydraulic Motor (22) that place broken roller (41) two ends respectively, and breaker roll HM Hydraulic Motor (22) links to each other with breaker roll (4) by coupler (23).
2, completely hydraulically driven breaking dredger according to claim 1 is characterized in that: described breaker roll hydraulic control system (81) comprises motor (811), Hydraulic Pump (818), fuel tank (817), by pass valve (812), filter (816), change-over valve (813), governor valve (814) and back pressure valve (815); The axle head that advances of Hydraulic Pump (818) links to each other with motor (811), the input port of Hydraulic Pump (818) links to each other with fuel tank (817) by filter (816), a delivery port of Hydraulic Pump (818) links to each other with breaker roll HM Hydraulic Motor (22) with governor valve (814) by change-over valve (813) successively, another delivery port of Hydraulic Pump (818) links to each other with fuel tank (817) by by pass valve (813), and the oil outlet place of HM Hydraulic Motor (22) is provided with back pressure valve (815).
3, completely hydraulically driven breaking dredger according to claim 1 and 2 is characterized in that: described walking hydraulic control system (82) comprises motor (821), Hydraulic Pump (822), by pass valve (824), filter (823), change-over valve (827), governor valve (826) and pressure relay (825); The axle head that advances of Hydraulic Pump (822) links to each other with motor (821), the input port of Hydraulic Pump (822) links to each other with fuel tank (817) by filter (823), a delivery port of Hydraulic Pump (822) links to each other with HM Hydraulic Motor 35 with governor valve (826) by change-over valve (827) successively, and another delivery port of Hydraulic Pump (822) links to each other with fuel tank (817) by by pass valve (824); Pressure relay (825) is arranged between governor valve (826) and the change-over valve (827).
4, completely hydraulically driven breaking dredger according to claim 1 and 2 is characterized in that: described breaker roll (4) comprises broken roller (41), connection seat (44), crushing head (42) and cutting blade (43); Be connected with connection seat (44) on the excircle of broken roller (41), crushing head (42) is installed in a side of connection seat (44), its head places the top of connection seat (44), cutting blade (43) is anchored on connection seat (44) opposite side, be provided with fixed blade (9) in the corresponding position of cutting blade (43), described fixed blade (9) is installed in fixedly on the tool rest (12).
5, completely hydraulically driven breaking dredger according to claim 3 is characterized in that: described breaker roll (4) comprises broken roller (41), connection seat (44), crushing head (42) and cutting blade (43); Be connected with connection seat (44) on the excircle of broken roller (41), crushing head (42) is installed in a side of connection seat (44), its head places the top of connection seat (44), cutting blade (43) is anchored on connection seat (44) opposite side, be provided with fixed blade (9) going back to the corresponding position of cutting blade (43), described fixed blade (9) is installed in fixedly on the tool rest (12).
6, completely hydraulically driven breaking dredger according to claim 1 and 2 is characterized in that: described track (7) comprises rail (72) and bearing pin (71), and rail (72) middle part has the hole, is inserted with bearing pin (71) in the hole; One side of described trailing wheel (6) is the light face, and another side is a pin gear, the pin gear of rear walking wheel (6) end face and track (7) upper pin (71) engagement.
7, completely hydraulically driven breaking dredger according to claim 3 is characterized in that: described track (7) comprises rail (72) and bearing pin (71), and rail (72) middle part has the hole, is inserted with bearing pin (71) in the hole; One side of described trailing wheel (6) is the light face, and another side is a pin gear, the pin gear of rear walking wheel (6) end face and track (7) upper pin (71) engagement.
8, completely hydraulically driven breaking dredger according to claim 4 is characterized in that: described track (7) comprises rail (72) and bearing pin (71), and rail (72) middle part has the hole, is inserted with bearing pin (71) in the hole; One side of described trailing wheel (6) is the light face, and another side is a pin gear, the pin gear of rear walking wheel (6) end face and track (7) upper pin (71) engagement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620049920 CN2889984Y (en) | 2006-01-24 | 2006-01-24 | Fully-hydraulic traveling-driven type breaking dredging-machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620049920 CN2889984Y (en) | 2006-01-24 | 2006-01-24 | Fully-hydraulic traveling-driven type breaking dredging-machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2889984Y true CN2889984Y (en) | 2007-04-18 |
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ID=38020636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620049920 Expired - Lifetime CN2889984Y (en) | 2006-01-24 | 2006-01-24 | Fully-hydraulic traveling-driven type breaking dredging-machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2889984Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100398225C (en) * | 2006-01-23 | 2008-07-02 | 长沙通发高新技术开发有限公司 | Completely hydraulically driven breaking dredger |
| CN107030901A (en) * | 2017-05-15 | 2017-08-11 | 临颍兴业机械制造有限公司 | The automatic hydraulic cutting machine of prestressed concrete plate or light cellular partition board |
| CN110329800A (en) * | 2019-07-11 | 2019-10-15 | 吉林圆方机械集团有限公司 | A kind of garbage decomposition feeding device |
-
2006
- 2006-01-24 CN CN 200620049920 patent/CN2889984Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100398225C (en) * | 2006-01-23 | 2008-07-02 | 长沙通发高新技术开发有限公司 | Completely hydraulically driven breaking dredger |
| CN107030901A (en) * | 2017-05-15 | 2017-08-11 | 临颍兴业机械制造有限公司 | The automatic hydraulic cutting machine of prestressed concrete plate or light cellular partition board |
| CN110329800A (en) * | 2019-07-11 | 2019-10-15 | 吉林圆方机械集团有限公司 | A kind of garbage decomposition feeding device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080702 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |