CN210660310U - Quiet box generator set - Google Patents
Quiet box generator set Download PDFInfo
- Publication number
- CN210660310U CN210660310U CN201921637532.0U CN201921637532U CN210660310U CN 210660310 U CN210660310 U CN 210660310U CN 201921637532 U CN201921637532 U CN 201921637532U CN 210660310 U CN210660310 U CN 210660310U
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- generator set
- box
- silencer
- exhaust
- muffler
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- 230000003584 silencer Effects 0.000 claims abstract description 50
- 238000005192 partition Methods 0.000 claims description 20
- 238000009413 insulation Methods 0.000 claims description 11
- 239000004576 sand Substances 0.000 claims description 11
- 229920000742 Cotton Polymers 0.000 claims description 9
- 230000009194 climbing Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000012774 insulation material Substances 0.000 abstract description 4
- 230000005855 radiation Effects 0.000 abstract description 4
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 238000000638 solvent extraction Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 27
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
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- Exhaust Silencers (AREA)
Abstract
The utility model discloses a silence case generating set, the vertical baffle of seting up the baffle hole that is provided with in silence case generating set's the box, radiator shutoff baffle hole, the baffle is with box internal partitioning for two independent spaces jointly with the radiator, be studio and air exhaust room respectively, be provided with the generating set that engine and generator constitute in the studio, the blast pipe intercommunication of engine has noise eliminator, noise eliminator includes the silencer of two-stage series connection, the silencer structure of two-stage series connection has formed impedance combined type silencer system, can reach better to high, the intermediate frequency noise is eliminated the sound, again can be better to low, the intermediate frequency noise is eliminated the sound. The noise eliminator and the exhaust pipeline are coated with heat insulation materials, so that high-temperature radiation can be well prevented, outward diffusion of heat is effectively prevented, the noise eliminator can better adapt to a desert environment, and the working reliability of a generator set of a silent box is ensured.
Description
Technical Field
The utility model belongs to the technical field of power generation equipment, concretely relates to silence case generating set.
Background
As shown in fig. 1 and fig. 2, a conventional silent box generator set mainly includes a chassis 1, a generator 4, an engine 2, a radiator 6, a muffler device 7, a box 8, and the like. An oil tank of the generator set is directly welded on the chassis 3, the engine 2 is provided with a single-core air filter, a silencer device 7 is arranged at the tail of an exhaust pipe of the engine 2 and is a silencer, and silencing cotton is attached to the inner wall of the box body 8. The silent box generator set in the prior art has simple system structure and convenient installation, and is suitable for common land power generation environment.
In the environment with large wind sand, the exposed silencer device 7 is easily broken by the wind sand, the silencer device 7 which breaks the paint in the wind frost environment is more easily rusted, and the rusty silencer device 7 is more easily damaged when hit by the wind sand, so that the service life of the silencer device is greatly shortened.
In the aspect of the exhaust chamber, hot air directly strikes the vertically arranged sound insulation board, and a part of heat and noise flow back, which is also not beneficial to the heat dissipation inside the box body 8.
The oil tank lug weld is on chassis 1, if when many generating set parallel use, need single filling fuel, expend time and labour, reduce work efficiency.
Disclosure of Invention
The utility model discloses the technical problem that will solve is: the utility model provides a silence case generating set can adapt to desert environment better, guarantees the reliability of silence case generating set work.
In order to solve the technical problem, the technical scheme of the utility model is that:
the generator set comprises a silent box generator set body, wherein a vertical partition plate is arranged in the silent box generator set body, partition plate holes are formed in the partition plate, a radiator is arranged at the partition plate holes, the partition plate blocks the partition plate holes, the partition plate and the radiator jointly divide the inner part of the silent box body into two independent spaces, namely a working chamber and an exhaust chamber, an engine and a generator set are arranged in the working chamber, an exhaust pipe of the engine is communicated with a silencer, and the silencer is characterized by comprising two stages of silencers connected in series.
Furthermore, the two stages of the silencers connected in series are respectively a first-stage silencer and a second-stage silencer, and the first-stage silencer is communicated with the second-stage silencer through an exhaust pipeline; the first-stage silencer, the second-stage silencer and the exhaust pipeline are all coated with heat insulation layers.
Further, the first-stage silencer is positioned inside the box body.
Furthermore, an air filter is arranged on the engine, and the air filter is a desert air filter.
Furthermore, the air inlet is arranged in the working chamber area, and the box body is provided with an air inlet; the box body is positioned in the exhaust chamber area and is provided with an exhaust outlet; and an air deflector is arranged in the exhaust chamber.
Further, the air deflector is obliquely arranged.
Furthermore, the air deflector comprises a detachable mounting plate mounted on the inner wall of the box body, a fixed mounting plate is mounted on the detachable mounting plate, a waterproof heat-insulating layer is arranged on the inner wall of the fixed mounting plate, and sound-absorbing cotton is arranged between the waterproof heat-insulating layer and the detachable mounting plate; the air deflector is provided with a water leakage and sand discharge hole.
Furthermore, an oil tank is arranged in the exhaust chamber, the oil tank is positioned below the air deflector, and a valve for feeding and discharging oil is arranged on the oil tank.
Furthermore, the outer surface of the box body is provided with a climbing ladder.
Furthermore, the box body is positioned at the end part of the exhaust chamber, and a detachable end door is arranged on the box body.
Since the technical scheme is used, the beneficial effects of the utility model are that:
the baffle that has seted up the baffle hole is vertically provided with in silence case generating set's the box, radiator shutoff baffle hole, the baffle is with the common internal partitioning of box for two independent spaces of radiator, be studio and exhaust chamber respectively, be provided with the generating set that engine and generator constitute in the studio, the blast pipe intercommunication of engine has noise eliminator, noise eliminator includes the silencer of two-stage series connection, the silencer structure of two-stage series connection has formed the impedance combined type silencer system, can enough well eliminate the noise to high, intermediate frequency noise, can well eliminate the noise to low, intermediate frequency noise again. The noise eliminator and the exhaust pipeline are coated with heat insulation materials, so that high-temperature radiation can be well prevented, outward diffusion of heat is effectively prevented, the noise eliminator can better adapt to a desert environment, and the working reliability of a generator set of a silent box is ensured.
Drawings
FIG. 1 is a schematic structural diagram of a prior art silent box generator set;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a perspective view of the mute box generator set (without the muffler device) of the present invention;
fig. 4 is a perspective view of another angle of the silence chamber generator unit (without the muffler device) of the present invention;
fig. 5 is a schematic structural diagram of the mute box generator set of the present invention;
FIG. 6 is a top view of FIG. 5;
FIG. 7 is an enlarged schematic view of the air deflection plate of FIG. 5;
FIG. 8 is an enlarged view of a portion of area A of FIG. 7;
FIG. 9 is a left side view of FIG. 7;
FIG. 10 is a schematic view of the removable mounting plate of FIG. 7;
in the drawings, the direction of the arrow indicates the flow direction of the gas;
in the figure, 1-chassis, 2-engine, 3-generator, 4-air filter, 51-side air inlet, 52-end air inlet, 6-radiator, 7-silencer, 71-primary silencer, 72-secondary silencer, 8-box, 91-side door I, 92-side door II, 10-air outlet, 11-end door, 12-explosion-proof lamp, 13-rain-proof cap, 141-climbing ladder I, 142-climbing ladder II, 15-air deflector, 151-fixed mounting plate, 152-waterproof heat-insulating layer, 153-sound-absorbing cotton, 154-detachable mounting plate, 155-water leakage and sand discharge hole, 16-oil tank, 17-hoisting device, 18-valve, 19-clapboard, 20-a working chamber, 21-an exhaust chamber, 23-a frame supporting heat insulation layer, 24-a sealing plate heat insulation layer, 25-a primary silencer mounting plate, 26-a connecting pipeline heat insulation layer and 27-a secondary silencer support.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Referring to fig. 3, 4, 5 and 6, a mute box generator set includes a box body 8, a partition plate 19 is vertically arranged in the box body 8, a partition plate hole is formed in the partition plate 19, a radiator 6 is arranged at the partition plate hole, the partition plate hole is blocked by the radiator 6, the partition plate 19 and the radiator 6 jointly divide the interior of the box body 8 into two independent spaces, namely a working chamber 20 and an exhaust chamber 21, and a generator set composed of an engine 2 and a generator 3 is arranged in the working chamber 20. The radiator 6 is preferably a radiator tank.
The exhaust pipe of the engine 2 is communicated with a muffler device 7, and the muffler device 7 comprises two stages of mufflers connected in series. The two-stage series muffler is a first-stage muffler 71 and a second-stage muffler 72 respectively, and the first-stage muffler 71 and the second-stage muffler 72 are communicated through an exhaust pipeline.
Through detailed calculation, silencer device 7 satisfies the utility model discloses a generating set falls volume of making an uproar requirement, with silencer device 7 according to the structural style that the space design of arranging in the box 8 reaches the function of making an uproar of falling of silence case optimization for one-level silencer 71, second grade silencer 72 series connection. The first-stage silencer 71 is preferably a resistive silencer, the second-stage silencer 72 is preferably a reactive silencer, the first-stage silencer 71 and the second-stage silencer 72 are reasonably designed in series according to the structure of the box body 8, and the first-stage silencer 71 and the second-stage silencer 72 are connected through an exhaust pipeline. The structure of two-stage silencer series connection has formed impedance combined type silencer system, has resistive muffler promptly to the noise elimination of high, intermediate frequency noise effectual characteristics, has reactive muffler again to low, intermediate frequency noise sound elimination effectual characteristics, is more suitable the utility model discloses a quiet case generating set's the requirement of making an uproar that falls. The primary muffler 71, secondary muffler 72, and exhaust line are all preferably clad with a layer of insulating material. The heat insulation layer is made of conventional heat insulation materials, belongs to common knowledge for technicians in the field, and is not described in detail herein, and the coated heat insulation layer can well block high-temperature radiation of exhaust, effectively prevent heat from diffusing outwards on an exhaust pipeline, and reduce the temperature inside the box body.
The primary muffler 71 is located inside the tank 8. The first-stage silencer 71 is arranged in the box body 8, so that erosion of sand particles and wind frost is prevented, and the service life of the first-stage silencer 71 is prolonged. The mounting weight of the primary muffler 71 and the secondary muffler 72 is completely supported by the frame support mounted on the cabinet 8, the primary muffler 71 is completely sealed in the frame support and the sealing plate, and the inner surface of the entire sealed space is attached with soundproof cotton and a heat insulating layer. The outer surface of the primary muffler 71 is wrapped with a heat insulating layer. The first-stage muffler 71 is first mounted on the frame support on the box body 8 via the mounting plate, then the first-stage muffler 71 is mounted on the first-stage muffler mounting plate 25, and finally the sealing plate is mounted. The surface parcel that the frame supported has frame support heat-insulating layer 23, and the surface parcel of closing plate has closing plate heat-insulating layer 24, and after the exhaust pipe was connected, all wrapped up connecting tube heat-insulating layer 26 at the surface of exhaust pipe, prevented thermal giving off. The interior of the box body 8 is provided with two independent spaces, which ensure that hot air is fully discharged to the exhaust chamber 21 and does not flow back to the working chamber 20. The secondary muffler 72 is mounted to the secondary muffler mounting bracket 27 inside the exhaust chamber 21, and the outer surface of the secondary muffler 72 is also covered with a heat insulating layer. After first-order silencer 71 and second-order silencer 72 arrange rationally, rain-proof cap 13 just can be installed additional in suitable space to box 8 outside, and under oil gas field environment, the valve body of rain-proof cap 13 inside can prevent the spark blowout of exhausting, prevents the emergence of generating set accident, and the stop cap on rain-proof cap 13 upper portion can be rain-proof when generating set stop operation. The rain hat 13 may be a general rain hat having only a rain-proof function.
In the studio 20, the top of the box body 8 is fixedly provided with an explosion-proof lamp 12 which can be used for explosion-proof illumination and is convenient for checking and maintaining the generator set.
The engine 2 is provided with an air cleaner 4, and the air cleaner 4 is preferably a desert air cleaner. The desert air filter can adapt to the industrial and mining environment with large wind sand and much dust, ensures the smooth air inlet of the engine 2 and plays a role in protecting the engine 2.
Still be provided with the hoisting accessory 17 that is used for hoisting whole generating set at the outer top of box 8, can be convenient for the utility model discloses a hoist and mount and the transfer of silence case generating set.
The outer surface of the box body 8 is provided with two climbing stands, preferably a first climbing stand 141 and a second climbing stand 142, which facilitate maintenance and inspection of the equipment.
Two side portions of the box 8 are provided with a first side portion door 91 and a second side portion door 92.
In the area of the working chamber 20, an air inlet is provided on the box body 8, and in order to ensure the air inlet amount, a side air inlet 51 and an end air inlet 52 are provided on the box body 8, wherein the side air inlet 51 is preferably provided with two air inlets, and the end air inlet 52 is preferably provided with two air inlets. Louvers are provided at both the side intake port 51 and the end intake port 52. The air outlet 10 is arranged on the box body 8 in the area of the air outlet chamber 21, and the air outlet 10 is preferably arranged at the top of the box body 8; the wind guide plate 15 is arranged in the wind discharging chamber 21, the wind guide plate 15 is fixed on the inner wall of the box body 8 through bolts, the wind guide plate 15 is preferably arranged obliquely, and the discharged hot wind is upwards discharged from the wind discharging outlet 10 after being collided by the wind guide plate 15.
An oil tank 16 is provided in the exhaust chamber 21, the oil tank 16 is located below the air guide plate 15, and a valve 18 for introducing and discharging oil is provided in the oil tank 16. When a plurality of generator sets need to work simultaneously in an oil-gas field, the oil tank 16 of each generator set is independently filled with oil, so that time and labor are wasted, the oil tank 16 of each generator set can be connected with an oil tank with large oil storage capacity in series through an oil pipe for use, and fuel can be simultaneously filled into the oil tanks 16 of the generator sets by controlling an oil filling valve of the oil tank, so that the time and labor are greatly saved, the working efficiency is improved, and the labor cost is reduced.
The box body 8 is provided with a detachable end door 11 at the end of the exhaust chamber 21. The detachable end door 11 is detached, the air deflector 15 which is obliquely arranged can be seen, and the air deflector 15 can be taken out from the exhaust chamber 21 by detaching the fixing bolt from the lower side of the air deflector 15, so that the oil tank 16, the radiator 6, the exhaust component and the like can be conveniently maintained.
The box body 8 is fixedly arranged on the chassis 1.
As shown in fig. 7, 8, 9 and 10, the air deflector 15 includes a detachable mounting plate 154 mounted on the inner wall of the box 8, a fixed mounting plate 151 mounted on the detachable mounting plate 154, a waterproof heat-insulating layer 152 disposed on the inner wall of the fixed mounting plate 151, and sound-absorbing cotton 153 disposed between the waterproof heat-insulating layer 152 and the detachable mounting plate 154; the wind deflector 15 is also provided with a water leakage and sand discharge hole 155.
The air deflector 15 of the utility model has two functions, one is to guide the hot air to blow out the box body 8 more quickly and absorb the noise; secondly, heat is prevented from penetrating the air deflector 15, so that the temperature of fuel in the fuel tank 16 is influenced.
The air deflector 15 has a certain inclination when being installed, so that air can be exhausted better. The detachable mounting plate 154 at the bottom can mount the whole air deflector 15 to the inner wall of the box 8 by bolts and can be detached, which facilitates maintenance of the structure inside the box 8. According to the sound insulation and absorption theory, the upper part of the detachable mounting plate 154 is attached with the sound absorption cotton 153 with the thickness of 40mm, so that the effects of sound absorption and noise reduction are achieved. The sound absorption cotton 153 is attached with a waterproof heat insulation layer 152 on the upper portion thereof, so that heat can be insulated and prevented from penetrating the air deflector 15 to affect the temperature of the oil tank 16 located on the lower portion of the air deflector 15. Finally, the fixed mounting plate 151 is buckled on the detachable mounting plate 154 to be integrally and firmly fixed, so that the sound absorption cotton 153 and the waterproof heat insulation layer 152 are prevented from falling off from the detachable mounting plate 154. The environment of the oil and gas field is sandy and frosty, when the wind power generating set is used, the middle part and the lower part of the wind deflector 15 which is obliquely arranged are provided with the water leakage and sand discharge hole 155, and the wind power generating set can play a role in discharging wind and sand in time when the generating set stops running.
The cooling air enters the working chamber 20 through the side air inlet 51 and the end air inlet 52, the cooling air passing through the surfaces of the engine 2 and the generator 3 takes away heat in the working chamber 20 under the action of the radiator 6 of the engine 2, and enters the exhaust chamber 21, and the hot air is exhausted through the exhaust outlet 10 of the exhaust chamber 21 under the collision action of the air deflector 15. In addition, in the process, the air deflector 15 blocks heat, the oil tank 16 positioned below the air deflector 15 can be effectively blocked from absorbing heat, and the temperature of fuel oil in the oil tank 16 is ensured not to be increased.
The technical features (such as the first-stage muffler, the second-stage muffler, the first side door, the second side door, the first climbing ladder, the second climbing ladder, etc.) referred to in the description with serial numbers are only for distinguishing the technical features and do not represent the position relationship, the installation sequence, the working sequence, etc. among the technical features.
In the description of the present specification, it is to be understood that the orientations and positional relationships described in the terms of "end door", "top", "outer surface", "outer top", "bottom", "upper", "upward", "side", "end", "middle", "lower", "vertical", and the like are based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that the described embodiments are only some of the embodiments of the present invention, rather than all embodiments, which are given by way of illustration only, and the scope of the present invention is defined by the appended claims. Without any inventive step, those skilled in the art can make various changes or modifications to the embodiments without departing from the spirit and scope of the present invention.
Claims (10)
1. The generator set comprises a silent box generator set body, wherein a vertical partition plate is arranged in the silent box generator set body, partition plate holes are formed in the partition plate, a radiator is arranged at the partition plate holes, the partition plate blocks the partition plate holes, the partition plate and the radiator jointly divide the inner part of the silent box body into two independent spaces, namely a working chamber and an exhaust chamber, an engine and a generator set are arranged in the working chamber, an exhaust pipe of the engine is communicated with a silencer, and the silencer is characterized by comprising two stages of silencers connected in series.
2. The quiet tank generator set of claim 1, wherein said two series-connected stages of said muffler are a first stage muffler and a second stage muffler, respectively, said first stage muffler and said second stage muffler being in communication via an exhaust line; the first-stage silencer, the second-stage silencer and the exhaust pipeline are all coated with heat insulation layers.
3. The quiet box generator set of claim 2, wherein said primary muffler is located inside said box body.
4. The quiet box generator set of claim 1, wherein said engine is provided with an air filter, said air filter being a desert air filter.
5. The quiet box generator set of claim 1, wherein in said chamber area, said housing is provided with air intakes; the box body is positioned in the exhaust chamber area and is provided with an exhaust outlet; and an air deflector is arranged in the exhaust chamber.
6. The quiet tank generator set of claim 5 wherein said air deflection plates are angularly disposed.
7. The silent box generator set according to claim 6, wherein the air deflector comprises a detachable mounting plate mounted on the inner wall of the box body, a fixed mounting plate is mounted on the detachable mounting plate, a waterproof heat-insulating layer is arranged on the inner wall of the fixed mounting plate, and sound-absorbing cotton is arranged between the waterproof heat-insulating layer and the detachable mounting plate; the air deflector is provided with a water leakage and sand discharge hole.
8. The quiet tank generator set of claim 5, wherein an oil tank is disposed in said exhaust chamber, said oil tank being disposed below said air deflector, said oil tank being provided with a valve for inlet and outlet of oil.
9. The quiet box generator set of claim 1, wherein the exterior surface of said housing is provided with a climbing ladder.
10. The quiet box generator set of claim 1, wherein a removable end door is provided on said housing at an end of said exhaust plenum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921637532.0U CN210660310U (en) | 2019-09-28 | 2019-09-28 | Quiet box generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921637532.0U CN210660310U (en) | 2019-09-28 | 2019-09-28 | Quiet box generator set |
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| Publication Number | Publication Date |
|---|---|
| CN210660310U true CN210660310U (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921637532.0U Active CN210660310U (en) | 2019-09-28 | 2019-09-28 | Quiet box generator set |
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| CN (1) | CN210660310U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112523852A (en) * | 2021-01-15 | 2021-03-19 | 福建亚南电机有限公司 | Tail gas purification and noise elimination system for generator set and working method |
| CN113335027A (en) * | 2021-08-02 | 2021-09-03 | 徐州海伦哲特种车辆有限公司 | Full-automatic combined overhead exhaust system of power supply vehicle and control method thereof |
| US12218568B2 (en) | 2020-08-27 | 2025-02-04 | Cummins Power Generation Inc. | System for a generator set |
-
2019
- 2019-09-28 CN CN201921637532.0U patent/CN210660310U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12218568B2 (en) | 2020-08-27 | 2025-02-04 | Cummins Power Generation Inc. | System for a generator set |
| CN112523852A (en) * | 2021-01-15 | 2021-03-19 | 福建亚南电机有限公司 | Tail gas purification and noise elimination system for generator set and working method |
| CN113335027A (en) * | 2021-08-02 | 2021-09-03 | 徐州海伦哲特种车辆有限公司 | Full-automatic combined overhead exhaust system of power supply vehicle and control method thereof |
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Effective date of registration: 20210520 Address after: 261061 no.197 a, Fushou East Street, high tech Zone, Weifang City, Shandong Province Patentee after: WEICHAI ELECTRIC POWER EQUIPMENT Co.,Ltd. Address before: 261108 Fuhai Street, Binhai Economic and Technological Development Zone, Weifang City, Shandong Province Patentee before: WEICHAI HEAVY MACHINERY Co.,Ltd. |