CN110227909B - Processing method of open type double-layer heat-insulation oil tank body - Google Patents
Processing method of open type double-layer heat-insulation oil tank body Download PDFInfo
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- CN110227909B CN110227909B CN201910521656.0A CN201910521656A CN110227909B CN 110227909 B CN110227909 B CN 110227909B CN 201910521656 A CN201910521656 A CN 201910521656A CN 110227909 B CN110227909 B CN 110227909B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention discloses a processing method of an open type double-layer heat-insulation oil tank body, which comprises the steps of splitting the open type double-layer heat-insulation oil tank body into an inner frame, an outer frame, an upper cover plate, an inner bottom plate, an outer bottom plate and an interface, respectively processing the inner frame, the outer frame, the upper cover plate, the inner bottom plate, the outer bottom plate and the interface, and then assembling and welding for forming; the respective processing comprises box body processing and interface processing. The processing method of the open type double-layer heat-insulation oil tank body provided by the invention has the advantages that the oil tank body is split in a modularized mode, all parts are welded and formed together after being processed independently, oil tank holes are processed and formed before plates of the inner frame and the outer frame are bent into a box-type structure, the process of processing the holes after the original oil tank shell is processed is optimized, the problem of deformation of the oil tank body during hole processing is avoided, meanwhile, the interface processing is divided into the integral type interface and the split type interface, the welding operation of the interface joint is facilitated, the work transferring process is integrally reduced, the cost is saved, and the processing quality and the processing efficiency are improved.
Description
Technical Field
The invention relates to the technical field of mechanical manufacturing, in particular to a method for processing an open type double-layer heat-preservation oil tank body.
Background
Part hydraulic system has the requirement of heating to the medium, generally goes on in the oil tank during heating, and the oil tank needs to possess the heat preservation function, and the heat preservation oil tank box is open bilayer structure usually, has the heat preservation in the inside and outside layer oil tank, fills insulation material and plays the heat preservation effect. The original processing technology of the oil tank is as follows: the process method has the defects that the process steps are multiple, a boring machine is needed to process the holes, the thickness of the box body is thin, the box body deforms when the holes are processed, the welding operation of the joint is difficult, and the like.
Disclosure of Invention
The invention provides a method for processing an open type double-layer heat-insulation oil tank body, which aims to solve the technical problems that the deformation of the tank body is easily caused by processing a hole of the double-layer oil tank body, and the welding operation of different shaft interfaces of an inner layer hole and an outer layer hole on the tank body is difficult.
According to one aspect of the invention, the method for processing the open type double-layer heat-preservation oil tank body is used for processing an oil tank for a hydraulic system in aircraft engine test equipment, the open type double-layer heat-preservation oil tank body is divided into an inner frame, an outer frame, an upper cover plate, an inner bottom plate, an outer bottom plate and a connector, and the inner frame, the outer frame, the upper cover plate, the inner bottom plate, the outer bottom plate and the connector are respectively processed and then are assembled and welded to form the open type double-layer heat-preservation oil tank body;
the respective processing comprises box body processing and interface processing;
the box processing comprises:
processing holes on plates for processing an inner frame, an inner base plate, an outer frame and an outer base plate, then bending and assembling and welding the plates for processing the inner frame after the holes are processed to form the inner frame, and bending and assembling and welding the plates for processing the outer frame after the holes are processed to form the outer frame;
the interface processing comprises the following steps:
the interface is divided into an integral interface and a split interface,
the integral type interface is formed by integral turning, the split type interface comprises a joint, a leak-filling plate and a pipe barrel, the joint and the leak-filling plate are welded into a joint body before assembly welding forming, and the joint bodies are welded with the pipe barrel, the inner frame and the outer frame into a whole during assembly welding processing.
Further, the size of the holes on the inner frame and the inner bottom plate is the same as the outer diameter of the integral interface or the outer diameter of the pipe barrel of the split interface.
Furthermore, the size of the holes on the outer frame and the outer bottom plate is larger than the outer diameter of the interface or larger than the outer diameter of the pipe barrel of the split interface, and the interface can be vertically inserted into the hole of the inner frame.
Further, the assembly welding forming comprises:
s1, overlapping the outer frame on the inner frame, enabling the inner frame to be flush with the upper part of the outer frame, and enabling the bottom of the outer frame to exceed the bottom of the inner frame;
s2, horizontally placing the upper cover plate on the upper parts of the inner frame and the outer frame, and welding and sealing the upper cover plate with the inner frame and the outer frame;
s3, welding the integral interface except the bottom plate of the box body with the inner frame and the outer frame in a sealing way;
s4, assembling and welding the inner bottom plate and the inner frame;
s5, welding the pipe barrel of the split type interface with the inner bottom plate, and welding an inner box body support at the bottom of the inner bottom plate;
filling heat insulation materials in the interlayer of the inner frame and the outer frame;
s6, welding and sealing the outer bottom plate and the outer frame;
and S7, inserting the joint body of the split type interface into the pipe barrel, and respectively welding and sealing the joint body with the pipe barrel and the outer frame after the joint body is tightly close to the outer frame.
Furthermore, a supporting clapboard is arranged between the interlayers of the inner frame and the outer frame,
in step S1, a plurality of support spacers are welded to the inner frame at intervals, and then the outer frame and the support spacers are welded together, so that the support spacers divide the interlayer into a plurality of independent areas.
Further, in step S6, before filling the thermal insulation material, leakage testing is further included, and the specific method includes: and (3) inverting and heightening the welded box body supported by the inner box body, pouring a leakage test solution into an interlayer between the inner frame and the outer frame, wherein the liquid level of the leakage test solution is higher than the inner bottom plate, and checking whether the inner box body and the joint welding line leak or not.
Furthermore, after the interface is vertically inserted into the hole of the inner frame, the flange surface of the integral interface or the leak-filling plate of the split interface completely covers the hole of the outer frame.
Furthermore, after the interface is inserted into the hole of the inner frame, the length of the interface is flush with the inner frame or exceeds a certain length, and the exceeding length does not affect welding.
Further, after step S7, welding an external support of the tank to the outer frame is further included.
Furthermore, the box also comprises a handle processed on the outer frame or rollers arranged at the bottom of the box body.
The invention has the following beneficial effects:
the processing method of the open type double-layer heat-insulation oil tank body comprises the steps of modularly splitting the oil tank body into the inner frame, the outer frame, the upper cover plate, the inner bottom plate, the outer bottom plate and the interface, separately processing the parts and then welding and forming the parts together, processing and forming the oil tank hole before bending the plates of the inner frame and the outer frame into the box-type structure, optimizing the process of processing the hole after the original oil tank shell is processed, avoiding the problem of deformation of the tank body during hole processing, simultaneously dividing the interface processing into the integral interface and the split interface processing, facilitating the welding operation of the interface joint, ensuring the welding and sealing of the joint even if the holes of the inner and outer tank bodies are not coaxial, integrally reducing the work transfer process, processing without a large-scale boring machine drilling machine, saving the cost and improving the processing quality and efficiency.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments 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 an open type double-layer heat-preservation oil tank body in a preferred embodiment of the invention;
FIG. 2 is a schematic structural diagram of an integral interface;
fig. 3 is a schematic structural diagram of a split interface;
fig. 4 is a schematic view of the assembly welding process of the open type double-layer heat-preservation oil tank body in the preferred embodiment of the invention.
Illustration of the drawings:
1. an inner frame; 2. an outer frame; 3. an upper cover plate; 4. an inner bottom plate; 5. an outer base plate; 6. an interface; 61. a joint; 62. a leak-filling plate; 63. a tube barrel; 7. the inner box body supports; 8. supporting the partition plate; 9. the box body is externally supported.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the accompanying drawings, but the invention can be embodied in many different forms, which are defined and covered by the following description.
Fig. 1 is a schematic structural diagram of an open type double-layer insulation oil tank body according to a preferred embodiment of the invention, fig. 2 is a schematic structural diagram of an integral type interface, and fig. 3 is a schematic structural diagram of a split type interface.
As shown in fig. 1-3, the method for processing an open type double-layer thermal insulation oil tank body in the embodiment is used for processing an oil tank for a hydraulic system in aircraft engine test equipment, the open type double-layer thermal insulation oil tank body is split into an inner frame 1, an outer frame 2, an upper cover plate 3, an inner bottom plate 4, an outer bottom plate 5 and a connector 6, and the inner frame 1, the outer frame 2, the upper cover plate 3, the inner bottom plate 4, the outer bottom plate 5 and the connector 6 are respectively processed and then are assembled and welded to form to obtain the open type double-layer thermal insulation oil tank;
respectively processing the box body and the interface;
the box processing includes:
processing holes on plates for processing the inner frame 1, the inner base plate 4, the outer frame 2 and the outer base plate 5, then bending and assembling and welding the plates for processing the holes into the inner frame 1 to form the inner frame 1, and bending and assembling and welding the plates for processing the holes into the outer frame 2 to form the outer frame 2; the sheet material is preferably a sheet metal.
The interface processing comprises the following steps:
the interface is divided into an integral interface and a split interface,
the integral type interface is formed by integral turning, the split type interface comprises a joint 61, a leak-filling plate 62 and a pipe barrel 63, the joint 61 and the leak-filling plate 62 are welded into joint bodies before assembly welding forming, and the joint bodies are welded with the pipe barrel 63, the inner frame 1 and the outer frame 2 into a whole during assembly welding processing.
The processing method of the open type double-layer heat-preservation oil tank body of the embodiment modularizes and splits the oil tank body into the inner frame 1, the outer frame 2, the upper cover plate 3, the inner bottom plate 4, the outer bottom plate 5 and the interface 6, and each part is welded together after being processed separately, the oil tank holes are processed and formed before the plates of the inner frame 1 and the outer frame 2 are bent into a box-type structure, the process of processing the holes after the original oil tank shell is processed is optimized, the operation of punching on the flat plate is easier than that of punching on the box body, and the problem of deformation of the box body during hole processing is avoided, meanwhile, the interface processing is divided into integral interface processing and split interface processing, which is convenient for the welding operation of the interface joint, even if the holes of the inner and outer boxes are not coaxial, the welding and sealing of the joint can be ensured, the whole process of transferring work is reduced, even if a large boring machine drilling machine is not used, the machining can be carried out, the cost is saved, and the machining quality and the machining efficiency are improved.
In this embodiment, the size of the holes in the inner frame 1 and the inner base plate 4 is the same as the outer diameter of the one-piece interface or the outer diameter of the tube 63 of the split interface. The integral type interface 6 is directly inserted into a hole of the inner frame 1 or the inner bottom plate 4, the pipe barrel 63 of the split type interface is inserted into a hole of the inner frame 1 or the inner bottom plate 4, the sealing of a joint is required to be ensured, the size of the hole is the same as the outer diameter of the integral type interface or the outer diameter of the pipe barrel 63 of the split type interface, and the positioning and welding sealing of the joint are facilitated.
In this embodiment, the size of the holes on the outer frame 2 and the outer bottom plate 5 is larger than the outer diameter of the integral interface or the outer diameter of the pipe barrel 63 of the split interface, and the interface 6 can be vertically inserted into the hole of the inner frame 1. Because the inner frame 1 and the outer frame 2 are firstly processed with holes on the plate, then bent and assembled into a box-type structure, and finally the inner frame 1 and the outer frame 2 are assembled and welded into a shape, the situation that the holes on the inner frame 1 and the holes on the outer frame 2 are not concentric can exist, the sizes of the holes on the outer frame 2 and the outer bottom plate 5 are set to be larger than the outer diameter of the pipe barrel of the integral type interface or the split type interface, and therefore, even if the outer layer box body and the inner layer box body are not concentric, the joint can be inserted into the inner layer box body to be welded.
In this embodiment, the assembly welding molding includes:
s1, overlapping the outer frame 2 on the inner frame 1, and enabling the inner frame 1 to be flush with the upper part of the outer frame 2, wherein the bottom of the outer frame 2 is higher than the bottom of the inner frame 1;
s2, horizontally placing the upper cover plate 3 on the upper parts of the inner frame 1 and the outer frame 2, and welding and sealing the upper cover plate with the inner frame 1 and the outer frame 2;
s3, welding the integral interface outside the box body bottom plate with the inner frame 1 and the outer frame 2 in a sealing way;
s4, assembling and welding the inner bottom plate 4 and the inner frame 1;
s5, welding the pipe barrel 63 of the split type interface with the inner bottom plate 4, and welding the inner box body support 7 at the bottom of the inner bottom plate 4;
filling heat insulation materials in the interlayer of the inner frame 1 and the outer frame 2;
s6, welding and sealing the outer bottom plate 5 and the outer frame 2;
and S7, inserting the joint body of the split type interface into the pipe barrel 63, and respectively welding and sealing the pipe barrel 63 and the outer frame 2 after the joint body is tightly close to the outer frame 2.
The processing method of the open type double-layer heat-preservation oil tank body of the embodiment adopts the steps that the oil tank body is split into a plurality of parts, holes are processed in advance, and finally, assembly welding is carried out, during assembly welding, assembly welding is carried out gradually from the inner layer to the outer layer, operation is very smooth, the problem that the processed parts are badly affected due to inconvenient operation or follow-up operation caused by structure shielding can be avoided, the processing technology is simplified, the work transferring process is reduced, and the requirement for equipment is lowered.
In this embodiment, a support spacer 8 is provided between the interlayers of the inner frame 1 and the outer frame 2,
in step S1, a plurality of support spacers 8 are welded to the inner frame 1 at intervals, and then the outer frame 2 is welded to the support spacers 8 so that the support spacers 8 divide the interlayer into a plurality of independent areas.
The supporting baffle 8 stands up with inside casing 1, frame 2 welds integratively, play the effect of supporting the location, supporting baffle 8 divides the intermediate layer of box into a plurality of independent regions simultaneously, can strengthen frame intensity, prevent the deformation of inside and outside frame, when filling insulation material, it is more even to enable insulation material distribution, insulation material runs the phenomenon of position and gathers together can not appear, strengthen the heat preservation heat accumulation effect of double-deck holding tank box, energy-concerving and environment-protective, supporting baffle 8's quantity and interval distance set up according to the volume size and the required intensity of actual double-deck holding tank box, every avris of preferred double-deck holding tank box sets up a supporting baffle at least.
In this embodiment, in step S6, before filling the thermal insulation material, leakage test is further included, and the specific method includes: and (3) inverting and heightening the welded inner box body support 7, pouring a leakage test solution into an interlayer between the inner frame 1 and the outer frame 2, enabling the liquid level of the leakage test solution to be higher than the inner bottom plate 4, and checking whether the inner box body and the interface welding line leak or not. The quality that the double-deck oil tank box that final processing was accomplished can be guaranteed in the leak test accords with the application demand, when the leak test detects nonconformity, can in time adjust processing, carries out sealed assembly welding again to the condition that can not use appears after processing is accomplished in the circumstances of avoiding.
In this embodiment, after the interface 6 is vertically inserted into the hole of the inner frame 1, the flange surface of the integral interface or the leak-filling plate 62 of the split interface completely covers the hole of the outer frame 2. The processing enables the junction between interface and the frame inseparabler like this, seals up the clearance that produces when the hole decentraction inside and outside the oil tank, prevents that insulation material from leaking from the clearance in hole.
In this embodiment, after the interface 6 is inserted into the hole of the inner frame 1, the length of the interface 6 is flush with the inner frame 1 or exceeds a certain length, and the exceeding length does not affect welding. By the aid of the welding device, the whole interface can be welded and sealed at one station during welding operation, and the welding position needs to be adjusted when the interface is too long.
In this embodiment, after step S7, the method further includes welding the outer box support 9 to the outer frame 2. The outer support 9 of box plays the supporting role when being used for placing the double-layer heat preservation oil tank, and for the convenience of moving or moving the double-layer heat preservation oil tank, the handle is preferably processed on the outer frame 2, the double-layer heat preservation oil tank can be carried through the handle during use, the idler wheels can be arranged at the bottom of the outer support 9 of the box, and the double-layer heat preservation oil tank can be moved through the rolling of the idler wheels.
The following will exemplify the processing of a specific open double-layer thermal insulation oil tank.
Example 1
The metal plate is used as a raw material for processing the inner frame 1, the outer frame 2, the inner bottom plate 4 and the outer bottom plate 5, joint holes are processed at corresponding positions of the metal plate according to a drawing, the size of the holes in the inner frame 1 and the inner bottom plate 4 is the same as the outer diameter of the integral interface or the outer diameter of the split interface pipe barrel, the size of the holes in the outer frame 2 and the outer bottom plate 5 is larger than the outer diameter of the integral interface or the outer diameter of the split interface pipe barrel, the joint 61 and the leakage filling plate 62 of the split interface are welded into a joint body, and the upper cover plate 3, the supporting partition plate 8, the inner box body support 7 and the outer box body support 9 are all cut.
As shown in fig. 4, the inner frame 1, the outer frame 2, the upper cover plate 3, the inner bottom plate 4, the outer bottom plate 5, the connector 6, the inner box support 7, the support partition plate 8 and the outer box support 9 are formed by assembly welding, and the assembly welding process comprises the following steps:
s100: welding the supporting clapboard 8 on the inner frame 1;
s200: welding the outer frame 2 and the support partition plate 8 into a whole, wherein the inner frame 1 is flush with the upper part of the outer frame 2, and the bottom of the outer frame 2 exceeds the bottom of the inner frame 1;
s300: the upper cover plate 3 is horizontally placed on the upper parts of the inner frame 1 and the outer frame 2 and is welded with the inner frame 1 and the outer frame 2 for sealing;
s400: sealing and welding the interface 6 outside the bottom of the box with the inner frame 1 and the outer frame 2;
s500: assembling and welding the inner bottom plate 4 and the inner frame 1;
s600: welding the pipe barrel 12 of the split type interface with the inner bottom plate 4, and welding the inner box body support 7;
leakage testing: inverting the oil tank, raising the height, filling a leakage test solution into the interlayer, enabling the liquid level to be higher than the inner bottom plate 4, and entering the tank to check whether the inner tank body and the interface welding line have leakage or not;
filling a heat insulation material: filling heat insulation materials in the interlayer of the inner frame 1 and the outer frame 2;
s700: welding and sealing the outer bottom plate 5 and the outer frame 2;
s800: inserting the joint body of the split type interface into the pipe barrel 13, and respectively welding and sealing the pipe barrel 13 and the outer frame 2 after abutting against the outer frame 2;
s900: the outer box support 9 is welded on the outer frame 2, and a handle is arranged on the outer frame 2 or rollers are arranged at the bottom of the outer box support 9.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A processing method of an open type double-layer heat-preservation oil tank body is used for processing an oil tank for a hydraulic system in test equipment of an aircraft engine and is characterized in that,
the open type double-layer heat-preservation oil tank body is divided into an inner frame (1), an outer frame (2), an upper cover plate (3), an inner bottom plate (4), an outer bottom plate (5) and an interface (6), and the inner frame (1), the outer frame (2), the upper cover plate (3), the inner bottom plate (4), the outer bottom plate (5) and the interface (6) are respectively processed and then are assembled and welded to form the open type double-layer heat-preservation oil tank body;
the respective processing comprises box body processing and interface processing;
the box processing comprises:
processing holes on plates which are processed into an inner frame (1), an inner base plate (4), an outer frame (2) and an outer base plate (5), then bending and assembling and welding the plates which are processed into the holes and are used for processing into the inner frame (1) to form the inner frame (1), and bending and assembling and welding the plates which are processed into the holes and are used for processing into the outer frame (2) to form the outer frame (2);
the interface processing comprises the following steps: the interface (6) is divided into an integral interface and a split interface,
the integral type interface is formed by integral turning,
the split type interface comprises a joint (61), a leak-filling plate (62) and a pipe barrel (63), the joint (61) and the leak-filling plate (62) are welded into joint bodies before assembly welding forming, and the joint bodies are welded with the pipe barrel (63), an inner frame (1) and an outer frame (2) into a whole during assembly welding processing.
2. The processing method of the open type double-layer heat preservation oil tank body according to claim 1,
the size of the holes in the inner frame (1) and the inner bottom plate (4) is the same as the outer diameter of the integral connector or the outer diameter of the pipe barrel (63) of the split connector.
3. The processing method of the open type double-layer heat preservation oil tank body according to claim 1,
the size of the holes on the outer frame (2) and the outer bottom plate (5) is larger than the outer diameter of the integral type interface or larger than the outer diameter of the pipe barrel (63) of the split type interface, and the interface (6) can be vertically inserted into the hole of the inner frame (1).
4. The processing method of the open type double-layer heat preservation oil tank body according to claim 1,
the assembly welding forming comprises:
s1, overlapping the outer frame (2) on the inner frame (1), enabling the inner frame (1) to be flush with the upper part of the outer frame (2), and enabling the bottom of the outer frame (2) to exceed the bottom of the inner frame (1);
s2, horizontally placing the upper cover plate (3) on the upper parts of the inner frame (1) and the outer frame (2), and welding and sealing the upper cover plate with the inner frame (1) and the outer frame (2);
s3, welding integral interfaces except the inner bottom plate (4) and the outer bottom plate (5) with the inner frame (1) and the outer frame (2) in a sealing way;
s4, assembling and welding the inner bottom plate (4) and the inner frame (1);
s5, welding the pipe barrel (63) of the split type interface with the inner bottom plate (4), and welding an inner box body support (7) at the bottom of the inner bottom plate (4);
filling heat insulation materials in the interlayer of the inner frame (1) and the outer frame (2);
s6, welding and sealing the outer bottom plate (5) and the outer frame (2);
s7, inserting the joint body of the split type interface into the pipe barrel (63), and respectively welding and sealing the joint body with the pipe barrel (63) and the outer frame (2) after the joint body is tightly close to the outer frame (2).
5. The processing method of the open type double-layer heat preservation oil tank body according to claim 4,
also comprises a supporting clapboard (8) arranged between the interlayers of the inner frame (1) and the outer frame (2),
in step S1, a plurality of supporting spacers (8) are welded to the inner frame (1) at intervals, and then the outer frame (2) and the supporting spacers (8) are welded together, so that the supporting spacers (8) divide the interlayer into a plurality of independent areas.
6. The processing method of the open type double-layer heat preservation oil tank body according to claim 4,
in step S6, before filling the thermal insulation material, leakage test is further included, and the specific method is as follows: and (3) inverting and heightening the welded box body with the inner box body support (7), pouring a leakage testing solution into an interlayer between the inner frame (1) and the outer frame (2), wherein the liquid level of the leakage testing solution is higher than the inner bottom plate (4), and checking whether the inner box body and the interface welding line leak or not.
7. The processing method of the open type double-layer heat preservation oil tank body according to claim 4,
after the interface (6) is vertically inserted into the hole of the inner frame (1), the flange surface of the integral interface or the leak-filling plate (62) of the split interface completely covers the hole of the outer frame (2).
8. The processing method of the open type double-layer heat preservation oil tank body according to claim 4,
after the interface (6) is inserted into the hole of the inner frame (1), the length of the interface (6) is parallel and level with the inner frame (1) or exceeds a certain length, and the exceeding length does not affect welding.
9. The processing method of the open type double-layer heat preservation oil tank body according to any one of claims 4 to 8,
after the step S7, welding a box outer support (9) on the outer frame (2).
10. The processing method of the open type double-layer heat preservation oil tank body according to claim 9,
the box also comprises a handle processed on the outer frame (2) or rollers arranged at the bottom of the support (9) outside the box body.
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| CN111232462B (en) * | 2020-02-10 | 2021-08-24 | 湖南大学 | Double-layer sealing box with activated carbon circulating sealing device |
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- 2019-06-17 CN CN201910521656.0A patent/CN110227909B/en active Active
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