CN204439103U - Packoff - Google Patents
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- CN204439103U CN204439103U CN201520039603.2U CN201520039603U CN204439103U CN 204439103 U CN204439103 U CN 204439103U CN 201520039603 U CN201520039603 U CN 201520039603U CN 204439103 U CN204439103 U CN 204439103U
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Abstract
The utility model discloses a kind of packoff, comprise support frame, thermal insulation board, ground floor stripper rubber, second layer stripper rubber and third layer stripper rubber, described ground floor stripper rubber, third layer stripper rubber are covered in upper surface and the lower surface of described support frame respectively, described ground floor stripper rubber, third layer stripper rubber are equipped with through hole, connected by described second layer stripper rubber between two through hole, the through hole on ground floor stripper rubber is sealed by thermal insulation board.Support frame comprises the first brace summer, the second brace summer, and connects many fixed bars of described first brace summer and described second brace summer, and described first brace summer outward flange is greater than described second brace summer outward flange; Described ground floor stripper rubber outward flange is greater than described first brace summer outward flange, and described second layer stripper rubber is up-narrow and down-wide and the right cylinder of hollow.The packoff that the utility model proposes, improves sealing effectiveness, simplifies seal operation, saves manpower.
Description
Technical field
Basis is practical newly relates to environmental reliability compbined test application, particularly a kind of packoff.
Background technology
Environmental reliability comprehensive test system is the trend of environmental test development, and this combined stress puts on the mode of product can better the actual application environment of analog equipment.Along with the development of fail-test, this combined stress testing equipment arises at the historic moment, and corresponding auxiliary equipment also occurs thereupon needing simultaneously.
According to testing standard requirement, the comprehensive reliability test system of large product need be set up, combined test chamber in one, is applicable to Aerospace Products in conjunction with temperature, humidity, vibrating function, information electronic instrument and meter, material, electrician, electronic product, various electronic element check its property indices under comprehensive rugged surroundings.As shown in Figure 1, this system comprises: humiture test box 1, device framework 2, fixing vibration table 3 and removable vibration table 4; The bottom surface of humiture test box 1 is provided with fixing circular hole 5 and slot 6.Humiture test box 1 is arranged on above device framework 2, and fixing vibration table 3 is arranged on the below of fixing circular hole 5, and fixing vibration table 3 is fixedly connected with fixing circular hole 5, and removable vibration table 4 is arranged on the below of slot 6.During use, after fixing vibration table 3 and removable vibration table 4 are set, need to paste silica gel in the junction of the junction of fixing vibration table 3 and fixing circular hole 5 and removable vibration table 4 and slot 6, and need to use sealing sponge to seal at fixing circular hole 5 and slot 6 place, with warranty test platform sealing, ensure the temperature and humidity of humiture test box 1 experimental enviroment.This system can apply three kinds of environmental stresses, is respectively temperature stress, humidity modification and vibration stress.Two vibration tables that test products is separately fixed at system ensemble in humiture test box 1 and by two cover test fixtures carry out combined stress applying, and the centre distance needs that two shaking table centre distances are installed according to product clamper can adjust.
But, this system is in process of the test, and because the length of test products is different, the mounting center of product is apart from different, need to remove silica gel and sponge that removable vibration table 4 and slot 6 are pasted, select the position adapting to product to rearrange silica gel and sponge.Each according to different products, all need manually to carry out repeated disassembled and assembled and layout, cause the waste of material and manpower.And, using silica gel and sponge to carry out sealing simply makes sealing effectiveness bad, and can not ensure the temperature and humidity of humiture test box 1 experimental enviroment, the bad meeting of sealing effectiveness causes moisture to be easily liquefied as water, thus flow to vibration table, have a strong impact on experimental enviroment and test effect and efficiency.
Utility model content
In view of this, the purpose of this utility model is to propose a kind of packoff, to improve sealing effectiveness, simplifies seal operation, saves manpower.
Based on above-mentioned purpose, the utility model provides a kind of packoff, comprise support frame, thermal insulation board, ground floor stripper rubber, second layer stripper rubber and third layer stripper rubber, described ground floor stripper rubber, third layer stripper rubber are covered in upper surface and the lower surface of described support frame respectively, described ground floor stripper rubber, third layer stripper rubber are equipped with through hole, connected by described second layer stripper rubber between two through hole, the through hole on described ground floor stripper rubber is sealed by thermal insulation board.
Preferably, described support frame comprises the first brace summer, the second brace summer, and connects many fixed bars of described first brace summer and described second brace summer, and described first brace summer outward flange is greater than described second brace summer outward flange; Described ground floor stripper rubber outward flange is greater than described first brace summer outward flange, described second layer stripper rubber is up-narrow and down-wide and the right cylinder of hollow, the narrow end of this second layer stripper rubber is connected to the through hole edge that described ground floor stripper rubber is arranged, and wide end is fixedly connected with the through hole edge that described third layer stripper rubber is arranged.
Preferably, described first brace summer and described second brace summer are the back-shaped structure of hollow, and the two be arranged in parallel, and described fixed bar is perpendicular to described first brace summer.
Optionally, the hollow space of described first brace summer and the second brace summer is rectangle, square or circular.
Preferably, described third layer stripper rubber and described second brace summer equal and opposite in direction.
Optionally, described second layer stripper rubber bus and thermal insulation board place plane become the size at angle, line face to be 50 ° ~ 80 °; The narrow end internal diameter of described second layer stripper rubber is 400mm ~ 500mm, and the wide end internal diameter of described second layer stripper rubber is 700mm ~ 800mm.
Preferably, described second layer stripper rubber bus and thermal insulation board place plane become the size at angle, line face to be 70 °; The narrow end internal diameter of described second layer stripper rubber is 450mm, and the wide end internal diameter of described second layer stripper rubber is 750mm.
Optionally, described packoff also comprises fixed frame, heat-insulating shield, four-layer seal rubber and layer 5 stripper rubber, described four-layer seal rubber is covered in the upper surface of described fixed frame, described four-layer seal rubber is provided with through hole, this through hole is connected by described layer 5 stripper rubber with described fixed frame lower surface, and the through hole on described four-layer seal rubber is sealed by thermal insulation board.
Preferably, described fixed frame comprises the 3rd brace summer, the 4th brace summer, and connects many connecting links of described 3rd brace summer and described 4th brace summer, and described 3rd brace summer outward flange is greater than described 4th brace summer outward flange; Described four-layer seal rubber outward flange is greater than described 3rd brace summer outward flange, described layer 5 stripper rubber is up-narrow and down-wide and the right cylinder of hollow, the narrow end of this layer 5 stripper rubber is connected to the through hole edge that described four-layer seal rubber is arranged, and wide end is fixedly connected with described 4th brace summer.
Preferably, described 3rd brace summer and described 4th brace summer are annular, and the two be arranged in parallel, and described connecting link is perpendicular to described 3rd brace summer.
As can be seen from above; the packoff that the utility model provides; structure is simple; reliable; the connection between humiture test box and vibration table is convenient in the design of packoff, makes the sealing effectiveness of humiture test box good, ensure that the temperature and humidity of experimental enviroment; effectively serve heat insulation and protective effect, improve the reliability of test.Meanwhile, avoid and repeatedly arrange silica gel and sponge because of the needs according to different length product, save material and manpower, improve test efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of combined test chamber in prior art;
Fig. 2 is the perspective view that the utility model embodiment one packoff is observed from the 3rd stripper rubber;
Fig. 3 is the perspective view of the utility model embodiment one packoff;
Fig. 4 is the perspective view of the support frame of the utility model embodiment one packoff;
Fig. 5 is the perspective view of the ground floor stripper rubber of the utility model embodiment one packoff;
Fig. 6 is the perspective view that the utility model embodiment two packoff is observed from the 4th stripper rubber;
Fig. 7 is the perspective view that the utility model embodiment two packoff is observed from the 4th brace summer;
Fig. 8 is the perspective view of the fixed frame of the utility model embodiment two packoff;
Fig. 9 is the perspective view of the four-layer seal rubber of the utility model embodiment two packoff.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the utility model is further described.
See Fig. 2 and Fig. 3, the packoff that the utility model embodiment one relates to comprises support frame 7, ground floor stripper rubber 8, second layer stripper rubber 9, third layer stripper rubber 11 and thermal insulation board 10.Described ground floor stripper rubber 8, third layer stripper rubber 10 are covered in upper surface and the lower surface of described support frame 7 respectively, described ground floor stripper rubber 8, third layer stripper rubber 10 are equipped with through hole, connected by described second layer stripper rubber 9 between two through hole, through hole on ground floor stripper rubber 8 is sealed by thermal insulation board 10, thus formed and connect tight and constitutionally stable sealing cover body structure, for sealing vibration table top.
Fig. 4 is the perspective view of the support frame of the utility model embodiment one packoff, as shown in Figure 4, described support frame 7 comprises the first brace summer 12, be positioned at the second brace summer 13 below described first brace summer 12, and connect the many fixed bars 14 of described first brace summer 12 and the second brace summer 13.Preferably, described first brace summer 12 and the second brace summer 13 are back-shaped, and namely the centre of brace summer is empty, has enough spaces in order to hold vibration table top.
In the present embodiment, described first brace summer 12 and the second brace summer 13 be arranged in parallel, fixed bar 14 is perpendicular to described first brace summer 12, and described first brace summer 12 stretches out along its place plane, thus makes the outward flange of the first brace summer 12 be greater than the outward flange of the second brace summer 13.Therefore, this support frame 7 can firmly be fixed on combined test chamber slot 6.By this support frame 7, described packoff is fixed on combined test chamber.
The outer peripheral length of described first brace summer 12 should be greater than the width of combined test chamber slot 6, so that described packoff slides on combined test chamber slot 6.
As a preferred embodiment, the hollow space of described back-shaped first brace summer 12 and the second brace summer 13 is rectangle, and described second brace summer 13 hollow space is greater than the first brace summer 12 hollow space.In other embodiments, the hollow space of described first brace summer 12 and the second brace summer 13 also can be the shape such as circular, square.
For sake of clarity, to give a definition, the first face, brace summer 12 place is on the upside of described packoff, and the second face, brace summer 13 place is on the downside of described packoff.
Fig. 5 is the perspective view of the ground floor stripper rubber of utility model embodiment one packoff, and as in Figure 3-5, described ground floor stripper rubber 8 central authorities are provided with the first through hole 15, and described first through hole 15 is less than described first brace summer 12 hollow space.Described ground floor stripper rubber 8 is fixedly connected on the upper surface of the first brace summer 12 of described support frame 7, and the outward flange of ground floor stripper rubber 8 is greater than the outward flange of described first brace summer 12.During use, described ground floor stripper rubber 8 outward flange covers the first brace summer 12 outward flange, and fits with slot 6 edge in described combined test chamber, thus seals.As a preferred embodiment, described first through hole 15 center and the first brace summer 12 hollow space center superposition, described first through hole 15 is circular, to meet described vibration table end shape.In other embodiments, described first through hole 15 also can be other shapes such as square, rectangle.
As a preferred embodiment, described first brace summer 12 outward flange and ground floor stripper rubber 8 are bolted to connection.
As shown in Figures 2 and 3, in the present embodiment, described thermal insulation board 10 is fixedly connected on described ground floor stripper rubber 8 lower surface, and is sealed by described first through hole 15.This thermal insulation board 10 heat-blocking actions, prevent described vibration table heat to be passed to combined test chamber inside.
As a preferred embodiment, described thermal insulation board 10 is circular, and this thermal insulation board 10 is less than the first brace summer 12 hollow space.
As a preferred embodiment, periphery and the ground floor stripper rubber 8 of described thermal insulation board 10 are bolted to connection.Described thermal insulation board 10 center and described first through hole 15 center superposition.
In the present embodiment, similar to described first stripper rubber 8 structure, described third layer stripper rubber 11 central authorities are provided with the second through hole, and described second through hole is less than the hollow space of the second brace summer 13, and are greater than the first through hole 15.Described three-layer sealed rubber 11 size is identical with described second brace summer 13, and is fixedly connected on the lower surface of described second brace summer 13, just covers the lower surface of the second brace summer 13 completely.
As a preferred embodiment, the hollow space center superposition of described second through hole center and the second brace summer 13, described second through hole is circular, to meet described vibration table end shape.Described second through hole also can be other shapes such as square, rectangle in other embodiments.
As a preferred embodiment, the outward flange of described second brace summer 13 outward flange and third layer stripper rubber 11 is bolted to connection.
As shown in Figures 2 and 3, in the present embodiment, described second layer stripper rubber 9 is up-narrow and down-wide and the column of hollow, the narrow end of described second layer stripper rubber 9 is connected to the first through hole 15 edge on described ground floor stripper rubber 8, and wide end is fixedly connected with the second through hole edge on third layer stripper rubber 11.The hollow column that described second layer stripper rubber 9 is formed, for holding the top of described vibration table, plays sealing, protective effect to vibration table.
As a preferred embodiment, the narrow end margin of described second layer stripper rubber 9 is bolted first through hole 15 edge on described ground floor stripper rubber 8, and the second through hole edge of the wide end margin of described second layer stripper rubber 9 and described third layer stripper rubber 11 is bolted to connection.
As an optional embodiment, as shown in Figure 3, described second layer stripper rubber 9 bus and thermal insulation board 10 place plane become the size at angle, line face to be 50 ° ~ 80 °.The narrow end internal diameter of described second layer stripper rubber 9 is 400mm ~ 500mm, and the wide end internal diameter of described second layer stripper rubber 9 is 700mm ~ 800mm.Sealing device can be combined with the top of removable vibration table closely and stablize, and conveniently wraps the top of removable vibration table, improves sealing.
As a preferred embodiment, as shown in Figure 3, described second layer stripper rubber 9 bus and thermal insulation board 10 place plane become the size at angle, line face to be preferably 70 °.The narrow end internal diameter of described second layer stripper rubber 9 is preferably 450mm, and the wide end internal diameter of described second layer stripper rubber 9 is preferably 750mm.Make sealing effectiveness better like this, stock utilization is high.
The packoff that visible the present embodiment one relates to can cover on the top of vibration table, is conducive to sealing vibration table top.Sealing device syndeton is stablized; sealing, insulation and the effect of controlled humidity can be played to combined test chamber inside, removable vibration table be played a protective role, can prevent water from flowing to removable vibration table; facilitate testing crew to install, ensure that efficiency and the quality of test.
As shown in Figure 6 and Figure 7, the packoff that the utility model embodiment two relates to comprises fixed frame 7a, four-layer seal rubber 8a, layer 5 stripper rubber 9a and heat-insulating shield 10a.Described four-layer seal rubber 8a is covered in the upper surface of described fixed frame 7a, and described four-layer seal rubber 8a is provided with through hole, and this through hole is sealed by described heat-insulating shield 10a.Described layer 5 stripper rubber 9a connects through hole and fixed frame 7a lower surface on four-layer seal rubber 8a, thus is formed and connect tight and constitutionally stable sealing cover body structure, for sealing vibration table top.
Fig. 8 is the perspective view of the fixed frame 7a of the utility model embodiment two packoff, as shown in Figure 8, described fixed frame 7a comprises the 3rd brace summer 12a, be positioned at the 4th brace summer 13a below described 3rd brace summer 12a, and connect the many connecting link 14a of described 3rd brace summer 12a and the 4th brace summer 13a.Preferably, described 3rd brace summer 12a and the 4th brace summer 13a is annular, and namely the centre of brace summer is empty, has enough spaces in order to hold vibration table top.
In the present embodiment, described 3rd brace summer 12a and the 4th brace summer 13a be arranged in parallel, connecting link 14a is perpendicular to described 3rd brace summer 12a, and described 3rd brace summer 12a stretches out along its place plane, thus the outward flange of the 3rd brace summer 12a is made to be greater than the outward flange of the 4th brace summer 13a.Therefore, this fixed frame 7a can firmly be fixed on combined test chamber circular hole 5.By this fixed frame 7a, described packoff is fixed on combined test chamber.
Fig. 9 is the perspective view of the four-layer seal rubber 8a of the utility model embodiment two packoff, and as Figure 7-9, described four-layer seal rubber 8a is provided with third through-hole 15a, and this third through-hole 15a is less than the hollow space of the 3rd brace summer 12a.Described four-layer seal rubber 8a outward flange is greater than the outward flange of described 3rd brace summer 12a, is covered in the 3rd brace summer 12a upper surface of described fixed frame 7a.During use, this four-layer seal rubber 8a edges cover the 3rd brace summer 12a edge, and fit with circular hole 5 edge of described combined test chamber, thus seal.
As a preferred embodiment, described third through-hole 15a center and described 3rd brace summer 12a hollow space center superposition, described third through-hole 15a is circular, to meet described vibration table end shape.
As a preferred embodiment, the peripheral edge of described 3rd brace summer 12a peripheral edge and four-layer seal rubber 8a is bolted to connection.
As shown in fig. 6-7, in the present embodiment, described heat-insulating shield 10a is fixedly connected on described four-layer seal rubber 8a lower surface, and is sealed by described third through-hole 15a.This heat-insulating shield 10a plays heat-blocking action, prevents described vibration table heat to be passed to combined test chamber inside.
As a preferred embodiment, described heat-insulating shield 10a is circular, and this heat-insulating shield 10a is less than the 3rd brace summer 12a hollow space.Periphery and the four-layer seal rubber 8a of heat-insulating shield 10a are bolted to connection.Described heat-insulating shield 10a center and described third through-hole 15a, the 3rd brace summer 12a center superposition.
As shown in fig. 6-7, in the present embodiment, described layer 5 stripper rubber 9a is up-narrow and down-wide and the column of hollow, and the narrow end of described layer 5 stripper rubber 9a is connected to third through-hole 15a edge on described 4th stripper rubber 8a, and wide end is fixedly connected with the 4th brace summer 13a edge.The hollow column that described layer 5 stripper rubber 9a is formed, for holding described vibration table top, plays sealing, protective effect to it.
As a preferred embodiment, the narrow end of described layer 5 stripper rubber 9a is bolted third through-hole 15a edge on described 4th stripper rubber 8a, and the wide end margin of described layer 5 stripper rubber 9a and the 4th brace summer 13a edge are bolted to connection.
As an optional embodiment, as shown in Figure 7, described layer 5 stripper rubber 9a bus and heat-insulating shield 10a place plane become the size at angle, line face to be 50 ° ~ 80 °; The narrow end internal diameter of described layer 5 stripper rubber 9a is 400mm ~ 500mm, and the wide end internal diameter of described layer 5 stripper rubber 9a is 700mm ~ 800mm.Such fixing seal device can be combined with the top of fixing vibration table closely and stablize, and conveniently wraps the top of fixing vibration table, improves sealing.
As a preferred embodiment, as shown in Figure 7, described layer 5 stripper rubber 9a bus and heat-insulating shield 10a place plane become the size at angle, line face to be preferably 70 °; The narrow end internal diameter of described layer 5 stripper rubber 9a is preferably 450mm, and the wide end internal diameter of described layer 5 stripper rubber 9a is preferably 750mm.Make sealing effectiveness better like this, stock utilization is high.
The packoff that visible the present embodiment two relates to can cover on the top of vibration table, is conducive to sealing vibration table.Sealing device syndeton is stablized; the effect of insulation and controlled humidity can be played combined test chamber inside, removable vibration table is played a protective role, can prevent water from flowing to removable vibration table; facilitate testing crew to install, ensure that efficiency and the quality of test.
During use, packoff in embodiment one is placed in slot 6 place, the top compact siro spinning technology with removable vibration table 4, is slidably connected with slot 6; Packoff in embodiment two is placed in fixing circular hole 5 place, with the top compact siro spinning technology of fixing vibration table 3.Two vibration tables that test products is separately fixed at system ensemble in humiture test box 1 and by two cover test fixtures carry out combined stress applying.According to the product needed of different length, removable vibration table 4 needs the change carrying out position according to the requirement of product mounting center distance, and in embodiment one, packoff can be free to slide along with on the slot 6 of the movement of removable vibration table 4 on humiture test box 1 bottom surface.
As can be seen from above; the packoff that the utility model provides; sealing structure is good; facilitate the connection between humiture test box and vibration table; make the sealing effectiveness of humiture test box good, ensure that the temperature and humidity of experimental enviroment, effectively serve heat insulation and protective effect; ensure that preferably experimental enviroment, improve the reliability of test.Meanwhile, avoid and repeatedly arrange silica gel and sponge because of the needs according to different length product, simplify seal operation, save material and manpower, improve test efficiency.
Those of ordinary skill in the field are to be understood that: the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle; any amendment of making, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a packoff, it is characterized in that, comprise support frame, thermal insulation board, ground floor stripper rubber, second layer stripper rubber and third layer stripper rubber, described ground floor stripper rubber, third layer stripper rubber are covered in upper surface and the lower surface of described support frame respectively, described ground floor stripper rubber, third layer stripper rubber are equipped with through hole, connected by described second layer stripper rubber between two through hole, the through hole on described ground floor stripper rubber is sealed by described thermal insulation board.
2. packoff according to claim 1, it is characterized in that, described support frame comprises the first brace summer, the second brace summer, and connects many fixed bars of described first brace summer and described second brace summer, and described first brace summer outward flange is greater than described second brace summer outward flange; Described ground floor stripper rubber outward flange is greater than described first brace summer outward flange, described second layer stripper rubber is up-narrow and down-wide and the right cylinder of hollow, the narrow end of this second layer stripper rubber is connected to the through hole edge that described ground floor stripper rubber is arranged, and wide end is fixedly connected with the through hole edge that described third layer stripper rubber is arranged.
3. packoff according to claim 2, is characterized in that, described first brace summer and described second brace summer are the back-shaped structure of hollow, and the two be arranged in parallel, and described fixed bar is perpendicular to described first brace summer.
4. packoff according to claim 3, is characterized in that, the hollow space of described first brace summer and the second brace summer is rectangle, square or circular.
5. packoff according to claim 2, is characterized in that, described third layer stripper rubber and described second brace summer equal and opposite in direction.
6. the packoff according to claim 1-5 any one, is characterized in that, the bus of described second layer stripper rubber and thermal insulation board place plane become the size at angle, line face to be 50 ° ~ 80 °; The narrow end internal diameter of described second layer stripper rubber is 400mm ~ 500mm, and the wide end internal diameter of described second layer stripper rubber is 700mm ~ 800mm.
7. packoff according to claim 6, is characterized in that, the bus of described second layer stripper rubber and thermal insulation board place plane become the size at angle, line face to be 70 °; The narrow end internal diameter of described second layer stripper rubber is 450mm, and the wide end internal diameter of described second layer stripper rubber is 750mm.
8. packoff according to claim 1, it is characterized in that, described packoff also comprises fixed frame, heat-insulating shield, four-layer seal rubber and layer 5 stripper rubber, described four-layer seal rubber is covered in the upper surface of described fixed frame, described four-layer seal rubber is provided with through hole, this through hole is connected by described layer 5 stripper rubber with described fixed frame lower surface, and the through hole on described four-layer seal rubber is sealed by heat-insulating shield.
9. packoff according to claim 8, it is characterized in that, described fixed frame comprises the 3rd brace summer, the 4th brace summer, and connects many connecting links of described 3rd brace summer and described 4th brace summer, and described 3rd brace summer outward flange is greater than described 4th brace summer outward flange; Described four-layer seal rubber outward flange is greater than described 3rd brace summer outward flange, described layer 5 stripper rubber is up-narrow and down-wide and the right cylinder of hollow, the narrow end of this layer 5 stripper rubber is connected to the through hole edge that described four-layer seal rubber is arranged, and wide end is fixedly connected with described 4th brace summer.
10. packoff according to claim 9, is characterized in that, described 3rd brace summer and described 4th brace summer are annular, and the two be arranged in parallel, and described connecting link is perpendicular to described 3rd brace summer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520039603.2U CN204439103U (en) | 2015-01-20 | 2015-01-20 | Packoff |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520039603.2U CN204439103U (en) | 2015-01-20 | 2015-01-20 | Packoff |
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| CN204439103U true CN204439103U (en) | 2015-07-01 |
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| CN201520039603.2U Active CN204439103U (en) | 2015-01-20 | 2015-01-20 | Packoff |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106369226A (en) * | 2016-11-27 | 2017-02-01 | 中国电建集团河南工程公司 | Small-caliber-pipeline intensive type heat preservation device and method |
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2015
- 2015-01-20 CN CN201520039603.2U patent/CN204439103U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106369226A (en) * | 2016-11-27 | 2017-02-01 | 中国电建集团河南工程公司 | Small-caliber-pipeline intensive type heat preservation device and method |
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