CN106111490B - Tower drum drying device and tower drum surface coating drying method - Google Patents
Tower drum drying device and tower drum surface coating drying method Download PDFInfo
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- CN106111490B CN106111490B CN201610494621.9A CN201610494621A CN106111490B CN 106111490 B CN106111490 B CN 106111490B CN 201610494621 A CN201610494621 A CN 201610494621A CN 106111490 B CN106111490 B CN 106111490B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
- B05D3/0413—Heating with air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
Abstract
The invention discloses a tower drum drying device and a tower drum surface coating drying method. The tower drum drying device comprises a drying channel assembly and a gas heating device, wherein the drying channel assembly is used for being matched with a tower drum to form a drying gas channel, a gas outlet of the gas heating device is connected with a gas inlet of the drying gas channel, and at least one part of the side wall of the drying gas channel is formed by the wall of the tower drum sprayed with a coating. This tower section of thick bamboo drying device can solve the whole paint construction cycle of a tower section of thick bamboo among the prior art long, the high technical problem of construction cost effectively.
Description
Technical Field
The invention relates to the technical field of drying, in particular to a tower drum drying device and a tower drum surface coating drying method.
Background
At present, the tower barrel structure types of wind driven generators at home and abroad are more and more, and mainly comprise a steel structure type, a concrete type and a mixed type, wherein the steel structure and the mixed type structure are more. The tower barrel is generally divided into 3-5 sections, and the sections are welded by steel plates. The diameter of each section is about 3-5 meters, and the length of each section is several meters. Along with the large-scale development of the wind generating set, the size of the tower barrel is also increased day by day.
The service life of the wind generating set is usually longer than 20 years, and the requirements on the capabilities of the tower barrel body such as rain resistance, rust resistance, corrosion resistance and the like are also quite strict. The larger the tower drum size is, the greater the difficulty in ensuring the paint quality is. The paint area of the barrel body of the tower barrel is large, and the drying of the paint is a great trouble. The current domestic common drying method for tower drum paint comprises the following steps: (1) and (3) natural wind drying, namely placing the painted tower drum in a factory building or an open place for natural air drying. The method has low cost, but needs proper temperature and humidity, and the production period is greatly influenced by climate. In an open-air paint field, the undried paint is seriously damaged by weather such as rainwater, ice and snow; (2) the paint room drying method is characterized in that a painted tower drum is placed in a special paint drying workshop, and infrared ray is adopted to accelerate drying. Because the size of the tower drum is large, the area required for building the drying workshop is much larger than that of the traditional equipment, and therefore, the method needs to invest a large amount of capital for building a special tower drum paint drying workshop.
Disclosure of Invention
The invention aims to provide a drum drying device and a drum surface coating drying method, and aims to solve the technical problems that in the prior art, the whole paint construction period of a drum is long and the construction cost is high.
The invention provides a tower drum drying device which comprises a drying channel assembly and a gas heating device, wherein the drying channel assembly is used for being matched with a tower drum to form a drying gas channel, a gas outlet of the gas heating device is connected with a gas inlet of the drying gas channel, and at least one part of the side wall of the drying gas channel is formed by the wall of the tower drum sprayed with a coating.
Further, when the inside of section of thick bamboo wall is equipped with the cavity, stoving passageway subassembly includes intake pipe and muffler, wherein, intake pipe, cavity and muffler connect gradually and form the stoving gas passageway.
Furthermore, the drying channel assembly comprises a drying cylinder, an air inlet pipe and an air return pipe, the drying cylinder is used for being sleeved outside the cylinder wall so as to form a drying space only between the drying cylinder and the cylinder wall, and the air inlet pipe, the drying space and the air return pipe are sequentially connected to form the drying gas channel.
Furthermore, the end part of the drying cylinder is provided with an inclined plane structure, and a sealing element is arranged between the inclined plane structure and the cylinder wall of the tower cylinder.
Further, the drying cylinder comprises a base and an upper cover arranged on the base, and an accommodating space for sleeving the cylinder wall is formed between the base and the upper cover.
Furthermore, the tower drum drying device further comprises a gas purifying device, at least one gas inlet of the gas purifying device is connected with a gas outlet of the drying gas channel, and at least one gas outlet of the gas purifying device is connected with a gas inlet of the gas heating device.
Further, this tower section of thick bamboo drying device still includes and holds the mechanism, hold the mechanism and be equipped with the accommodation space that is used for holding gas heating device, gas purification device and a tower section of thick bamboo, just hold the mechanism and seted up air inlet in the position of keeping away from gas heating device gas outlet.
Furthermore, a traveling mechanism is arranged at the lower part of the gas heating device.
The invention also provides a method for drying the surface coating of the tower drum by using the tower drum drying device, which comprises the following steps:
matching the drying channel assembly with a tower drum to form a drying gas channel, wherein at least one part of the side wall of the drying gas channel is formed by the drum wall sprayed with a coating in the tower drum;
the gas heating device conveys gas into the drying gas channel through the gas inlet of the drying gas channel until the coating sprayed on the wall of the tower cylinder is dry.
Further, the drying method further comprises the following steps: the gas discharged from the gas outlet of the drying gas passage is purified by a gas purification device, and at least a part of the purified gas is supplied to a gas heating device.
Further, cooperate stoving passageway subassembly and tower section of thick bamboo to form stoving gas channel, include:
when a cavity is arranged in the cylinder wall and the drying channel assembly comprises an air inlet pipe and an air return pipe, one end of the air inlet pipe included in the drying channel assembly is connected with an air inlet of the cavity, and one end of the air return pipe included in the drying channel assembly is connected with an air outlet of the cavity to form a drying gas channel;
when the drying channel assembly comprises a drying cylinder, an air inlet pipe and an air return pipe, the drying cylinder is sleeved outside the cylinder wall of the tower cylinder to form a drying space between the drying cylinder and the cylinder wall, one end of the air inlet pipe is connected with an air inlet of the drying space, and one end of the air return pipe is connected with an air outlet of the drying space to form a drying air channel.
The invention provides a tower drum drying device, which is characterized in that a drying air channel is formed by matching a drying channel component and a tower drum, and air is conveyed into the drying air channel through an air heating device. Moreover, the tower drum drying device is simple in structure, convenient to operate and low in manufacturing cost.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a tower drying apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a drying apparatus with two towers according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a drying device with three towers according to an embodiment of the present invention;
FIG. 4 is a side view of a drying apparatus with three towers according to an embodiment of the present invention.
In the figure:
1-drying the gas channel; 2-gas heating means; 3-a gas purification device;
4-drying workshop; 5-drying the cylinder; 6, a tower barrel;
11-cavity air inlet; 12-cavity air outlet; 51-drying cylinder air inlet;
52-drying cylinder air outlet; 53-a seal; 54-upper cover;
55-a base; 56-a connector; 61-the wall of the cylinder.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
As shown in fig. 1, the present embodiment provides a tower drum drying device, which includes a drying channel assembly and a gas heating device 2, the drying channel assembly is used to cooperate with a tower drum 6 to form a drying gas channel 1, an air outlet of the gas heating device 2 is connected to an air inlet of the drying gas channel 1, wherein at least a portion of a sidewall of the drying gas channel 1 is formed by a drum wall 61 of the tower drum 6 coated with a coating. It can be seen that the tower drum drying device delivers gas into the drying gas channel 1 through the gas heating device 2, and since at least a part of the side wall of the drying gas channel 1 is formed by the coated drum wall 61 of the tower drum 6, the gas in the drying gas channel 1 can exchange heat with the drum wall 61, so as to rapidly perform a drying function. The tower drum drying device is simple in structure and low in manufacturing cost.
When the inside of section of thick bamboo wall 61 is equipped with the cavity, stoving passageway subassembly includes intake pipe and muffler, and wherein, intake pipe, cavity and muffler connect gradually and form stoving gas passage 1. Thus, a part of the drying gas channel 1 is formed by the chamber inside the cylinder wall 61, i.e. the inner space of the chamber constitutes the heat exchange area. Preferably, the distribution of the cavities may be adapted to the overall surface shape of the tower 6, in order to exchange heat with the entire area of the wall 61.
Furthermore, a circuitous air channel is arranged in the cavity to increase the time and the area of heat exchange. A plurality of baffles are respectively arranged on the two opposite inner walls of the cavity in a staggered manner to form a circuitous air passage. That is to say, a plurality of first baffles are arranged at intervals on one side of the cavity close to the center of the tower 6, and a plurality of second baffles are arranged at intervals on one side of the cavity far away from the center of the tower 6. The first baffle plates and the second baffle plates are arranged in a staggered mode.
For the gas heating device 2, it may be a controllable electric furnace or a fuel generator; the gas heating device 2 can convey the heated gas into the drying gas channel 1 through a fan. The temperature of the gas generated by the gas heating device 2 needs to be intelligently regulated and controlled according to the characteristics of the adopted surface coating, the drying speed requirement and the like. At the same time, the flow rate of the supplied high-temperature gas also needs to be controlled according to the temperature increase rate. Because for surface coatings such as putties, paints, etc., too high a temperature or too rapid a temperature rise may cause problems such as poor adhesion of the paint film to the substrate, blistering, cracking of the paint film, peeling, etc.
In order to realize the recycling of gas, the gas outlet of the gas heating device 2 is connected with the cavity gas inlet 11 through a gas inlet pipe, and the cavity gas outlet 12 is connected with the gas inlet of the gas heating device 2 through a gas return pipe. The air inlet pipe and the air return pipe can be high-temperature-resistant rubber pipes and are connected with the interfaces at the two ends of the cavity through quick connectors, one interface serves as an air inlet, and the other interface serves as an air outlet. The interface form can be ordinary threaded interface, also can be other quick detach interfaces.
In addition, this tower section of thick bamboo drying device still includes gas purification device 3, and at least one gas inlet of gas purification device 3 is connected with the gas outlet of stoving gas channel 1, and at least one gas outlet of gas purification device 3 is connected with the gas inlet of gas heating device 2. Therefore, the hot air can be recycled, and the aims of energy conservation and emission reduction are effectively fulfilled.
For example: the number of the air inlets of the air purifying device 3 is two, one of the air inlets is connected with the air outlet of the drying air channel 1, and the other air inlet is communicated with the outside. Similarly, the number of the gas outlets of the gas purifying device 3 is also two, one of the gas outlets is connected with the gas inlet of the gas heating device 2, and the other gas outlet is communicated with the outside. Thus, the air of the gas heating device 2 comes partly from the low-temperature gas recovered in the tower 6 and partly from the outside air. The purified air is beneficial to protecting equipment such as a gas heating device 2 and the like, the service life is prolonged, the content of dust and toxic substances in the air can be continuously reduced, and the cleanliness of the air of a factory building is improved.
In order to achieve a more convenient heating of the tower 6, a travelling mechanism is provided in the lower part of the gas heating device 2, for example: the motor is matched with the travelling wheels, or the sliding block is matched with the sliding rails, and the like, so that the tower drum 6 can be heated anytime and anywhere.
In conclusion, the tower drum drying device forms a drying gas channel 1 through the drying channel assembly and the cavity in the drum wall 61, and then high-temperature gas is conveyed into the cavity through the gas heating device 2, so that heat exchange is performed between the high-temperature gas and the drum wall 61, and therefore the drying effect can be rapidly achieved. Moreover, the tower drum drying device is simple in structure, a special tower drum 6 paint drying workshop is not required to be established by investing huge funds, and the manufacturing cost is low.
Example two
As shown in fig. 2, the tower drum drying device provided in the second embodiment is further modified based on the first embodiment. Of course, the second embodiment includes the technical contents disclosed in the first embodiment, and the technical contents of the second embodiment that are the same as the technical contents of the first embodiment are not repeated, and the differences between the second embodiment and the first embodiment are described below.
Two tower section of thick bamboo drying device of this embodiment is still including holding the mechanism, and holding the mechanism and being equipped with the accommodation space that is used for holding gas heating device 2, gas purification device 3 and tower section of thick bamboo 6, and holds the mechanism and seted up air inlet in the position of keeping away from 2 gas outlets of gas heating device. The accommodating mechanism can be a built drying workshop 4, and can also be a large box body or a large shell, and is not limited here.
Preferably, in order to further reduce the pollution of the volatile gas to the environment during the paint drying process, a drying plant 4 dedicated to a tower 6 may be established. The drying plant 4 is used for placing equipment such as the gas heating device 2, the gas purifying device 3, the tower 6 and the like. The gas purification device 3 absorbs the low-temperature gas returned by the chamber, and also absorbs and purifies the polluted air in the drying plant 4, and discharges clean air into the drying plant 4.
Furthermore, the drying workshop 4 is provided with an air inlet at a position far away from the air outlet of the gas heating device 2. The outdoor clean air is used for supplementing clean air for the drying workshop 4 through an air inlet. Air in the drying workshop 4 is constantly purified through the gas purification device 3, and the amount of outdoor clean gas is increased simultaneously, can reduce indoor volatile pollutant concentration to the within range that the environmental protection required. The whole drying workshop 4 absorbs clean air from the outside, the purified air is discharged, and the zero emission of air pollutants can be basically realized on the premise that the capacity of the gas purification device 3 is enough.
EXAMPLE III
As shown in fig. 3 to 4, the tower drum drying device provided in the third embodiment is modified based on the first embodiment, and the technical contents of the third embodiment that are the same as those of the first embodiment are not repeated, and the differences between the third embodiment and the first embodiment are described below.
The drying channel assembly comprises a drying cylinder 5, an air inlet pipe and an air return pipe, wherein the drying cylinder 5 is used for being sleeved on the outer portion of the cylinder wall 61 to only form a drying space between the drying cylinder 5 and the cylinder wall 61, and the air inlet pipe, the drying space and the air return pipe are sequentially connected to form a drying gas channel 1. Thus, a part of the drying gas passage 1 is formed by a drying space formed between the drying drum 5 and the drum wall 61, that is, the drying space outside the drum wall 61 constitutes a heat exchange area. This type of tower dryer can also dry quickly, in particular in steel towers 6 made of thick steel.
In order to ensure the air tightness of the drying space, the end of the drying drum 5 is provided with an inclined plane structure, and a sealing element 53 is arranged between the inclined plane structure and the drum wall 61 of the tower 6.
Specifically, the drying drum 5 includes a base 55 and an upper cover 54 mounted on the base 55, and an accommodating space for sleeving the drum wall 61 is formed between the base 55 and the upper cover 54. Base 55 is placed on a horizontal ground, and upper cover 54 and base 55 are detachably connected by means of connecting piece 56 to form a complete drying drum 5. Preferably, the connector 56 is a bolt. The length of the drying drum 5 is slightly larger than that of the tower drum 6, the end part of the drying drum is provided with an inclined plane structure, and a sealing gasket is arranged on the inclined plane structure. The outer edge of the end part of the outer surface of the tower tube 6 is tightly extruded with the sealing gasket, so that a sealed drying space (heat exchange area) is formed between the tower tube 6 and the drying drum 5. Of course, the drying drum air inlet 51 is connected with the gas heating device 2 through an air inlet pipe, and the drying drum air outlet 52 is connected with the gas purifying device 3 through an air return pipe.
As for the specific structure of the gas heating device 2 and the gas purifying device 3, reference may be made to the first embodiment described above, and details thereof are omitted here.
It should be noted that, the third embodiment may be implemented alone, or implemented in combination with the third embodiment, that is, when a cavity is formed inside the cylindrical wall 61 of the tower 6, the drying drum 5 may be sleeved outside the cylindrical wall 61 of the tower 6, a space between the drying drum 5 and the cylindrical wall 61 of the tower 6 forms a heat exchange area, and the cavity inside the cylindrical wall 61 of the tower 6 forms another heat exchange area.
Example four
With reference to fig. 1 to 4, a fourth embodiment of the present invention is a drying method for a surface coating of a wind power tower 6, which is proposed based on the tower drying device of the foregoing embodiments, and includes: matching the drying channel assembly with the tower drum 6 to form a drying gas channel 1, wherein at least one part of the side wall of the drying gas channel 1 is formed by a drum wall 61 sprayed with a coating in the tower drum 6; the gas heating device 2 delivers gas into the drying gas duct 1 via the gas inlet of the drying gas duct 1 until the coating applied to the drum wall 61 of the tower 6 is dried. The method utilizes the heated gas to be conveyed into the drying gas channel 1, thereby completing the heat exchange effect with the cylinder wall 61, and finally realizing the drying effect quickly. It should be noted that the temperature of the gas generated by the gas heating device 2 needs to be intelligently controlled and adjusted according to the characteristics of the adopted surface coating, the drying speed requirement, and the like. For example: the temperature of the gas may range between 40 ° and 80 °. At the same time, the flow rate of the supplied high-temperature gas also needs to be controlled according to the temperature increase rate.
The drying method further comprises the following steps: the gas discharged from the gas outlet of the drying gas passage 1 is purified by the gas purifying device 3, and at least a part of the purified gas is supplied to the gas heating device 2. In connection with the structure of the gas purification device 3, at least one gas inlet of the gas purification device 3 is connected to a gas outlet of the drying gas channel 1, and at least one gas outlet of the gas purification device 3 is connected to a gas inlet of the gas heating device 2. Therefore, the hot air can be recycled, and the aims of energy conservation and emission reduction are effectively fulfilled.
In the drying method, the drying channel assembly and the tower 6 are matched to form the drying gas channel 1, and the drying method comprises the following steps: when the inside of section of thick bamboo wall 61 is equipped with the cavity, and stoving channel subassembly includes intake pipe and muffler, be connected the one end of the intake pipe that stoving channel subassembly included with the air inlet of cavity, and be connected the one end of the muffler that stoving channel subassembly included with the gas outlet of cavity in order to form stoving gas channel 1. When the drying channel assembly comprises a drying cylinder 5, an air inlet pipe and an air return pipe, the drying cylinder 5 is sleeved outside the cylinder wall 61 of the tower cylinder 6 to form a drying space between the drying cylinder 5 and the cylinder wall 61, one end of the air inlet pipe is connected with an air inlet of the drying space, and one end of the air return pipe is connected with an air outlet of the drying space to form a drying air channel 1.
In summary, in the drying method, the drying air channel 1 is formed by the drying channel assembly and the cavity in the cylinder wall 61 of the tower 6, and then the high-temperature air is conveyed into the cavity by the air heating device 2, so that the heat exchange effect is performed between the high-temperature air and the cylinder wall 61, and the drying effect can be rapidly achieved. The process is simple to operate and low in operation cost.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The utility model provides a tower section of thick bamboo drying device, its characterized in that includes stoving passageway subassembly and gas heating device (2), stoving passageway subassembly is used for forming stoving gas channel (1) with tower section of thick bamboo (6) cooperation, the gas outlet of gas heating device (2) with the air inlet of stoving gas channel (1) is connected, wherein, at least partly by spraying coating section of thick bamboo wall (61) in tower section of thick bamboo (6) of the lateral wall of stoving gas channel (1) forms, stoving passageway subassembly includes stoving section of thick bamboo (5), intake pipe and muffler, stoving section of thick bamboo (5) are used for the cover to establish the outside of section of thick bamboo wall (61) is in order only to form the stoving space between stoving section of thick bamboo (5) and section of thick bamboo wall (61), intake pipe, stoving space, muffler connect gradually and form stoving gas channel (1).
2. The tower drying installation according to claim 1, wherein the end of the drying drum (5) is provided with a ramp structure, and a seal (53) is provided between the ramp structure and the drum wall (61) of the tower (6).
3. The tower drying installation according to claim 2, wherein the drying drum (5) comprises a base (55) and an upper cover (54) mounted on the base (55), and a receiving space for sleeving the drum wall (61) is formed between the base (55) and the upper cover (54).
4. The tower drying installation according to any one of claims 1 to 3, further comprising a gas cleaning device (3), at least one gas inlet of the gas cleaning device (3) being connected to a gas outlet of the drying gas duct (1), at least one gas outlet of the gas cleaning device (3) being connected to a gas inlet of the gas heating device (2).
5. The tower drying device as claimed in claim 4, further comprising a receiving mechanism, wherein the receiving mechanism is provided with a receiving space for receiving the gas heating device (2), the gas purifying device (3) and the tower (6), and the receiving mechanism is provided with an air inlet at a position far away from the air outlet of the gas heating device (2).
6. The tower drying device of claim 1, wherein a traveling mechanism is provided at a lower portion of the gas heating device (2).
7. Method for drying the surface coating of a tower (6) by means of a tower drying device according to any one of claims 1 to 6, characterized in that it comprises:
matching the drying channel assembly with a tower drum (6) to form a drying air channel (1), wherein at least one part of the side wall of the drying air channel (1) is formed by a drum wall (61) sprayed with a coating in the tower drum (6);
the gas heating device (2) conveys gas into the drying gas channel (1) through the gas inlet of the drying gas channel (1) until the coating sprayed on the cylinder wall (61) in the tower cylinder (6) is dried.
8. The drying method of claim 7, further comprising: the gas discharged from the gas outlet of the drying gas duct (1) is purified by a gas purification device (3), and at least a part of the purified gas is supplied to a gas heating device (2).
9. The drying method according to claim 7, wherein the step of cooperating the drying duct assembly with the tower (6) to form the drying air duct (1) comprises:
the drying cylinder (5) is sleeved outside the cylinder wall (61) of the tower cylinder (6) to form a drying space between the drying cylinder (5) and the cylinder wall (61), one end of the air inlet pipe is connected with an air inlet of the drying space, and one end of the air return pipe is connected with an air outlet of the drying space to form a drying air channel (1).
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| CN101786074A (en) * | 2010-02-26 | 2010-07-28 | 保定天威集团有限公司 | Surface coating drying technology and special device for wind power tower |
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| CN101786074A (en) * | 2010-02-26 | 2010-07-28 | 保定天威集团有限公司 | Surface coating drying technology and special device for wind power tower |
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Address after: 102200 31 Industrial Park, North Qing Road, Beijing, Changping District Patentee after: Sany Heavy Energy Co.,Ltd. Address before: 102200 31 Industrial Park, North Qing Road, Beijing, Changping District Patentee before: SANY HEAVY ENERGY Co.,Ltd. Address after: 102200 31 Industrial Park, North Qing Road, Beijing, Changping District Patentee after: SANY HEAVY ENERGY Co.,Ltd. Address before: 102200 31 Industrial Park, North Qing Road, Beijing, Changping District Patentee before: SANY HEAVY ENERGY EQUIPMENT Co.,Ltd. |
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