CN207487415U - A kind of heating furnace hearth inner lining - Google Patents
A kind of heating furnace hearth inner lining Download PDFInfo
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- CN207487415U CN207487415U CN201721471348.4U CN201721471348U CN207487415U CN 207487415 U CN207487415 U CN 207487415U CN 201721471348 U CN201721471348 U CN 201721471348U CN 207487415 U CN207487415 U CN 207487415U
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- lug boss
- inner lining
- flame retardant
- heating furnace
- retardant coating
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Abstract
The utility model provides a kind of heating furnace hearth inner lining, including flame retardant coating (21), lug boss (22) and anchored brick (23), protrusion forms the lug boss (22) inside one lateral burner hearth of the flame retardant coating (21), the lug boss (22) is integrally formed with the flame retardant coating (21), one end (231) of the anchored brick (23) is embedded in from the opposite side of the flame retardant coating (21) in the flame retardant coating (21), and the other end (232) of the anchored brick (23) is for the steel structure connection with heating furnace.Above-mentioned hearth inner lining increases inner lining surface product using integrally formed lug boss as heat radiator, enhances heat transfer efficiency.On the one hand, the transformation process in liner surface drilling installation heat radiator is avoided, the situation that Drilling operation destroys hearth inner lining is avoided, improves inner lining structure stability；On the other hand, it also reduces because the difference of coefficient of thermal expansion causes liner cracking or liner to squeeze the situation of broken screw, avoids the problem of heat radiator comes off.
Description
Technical field
The utility model is related to heating furnace fields, and in particular to a kind of heating furnace hearth inner lining.
Background technology
Heater for rolling steel of the prior art, hearth inner lining be usually by refractory material through ramming, pour or prefabricated section
Etc. modes build, the liner laid be smooth plane.Hearth inner lining is in heating furnace body and the workpiece heated
It plays an important role in diabatic process, hearth inner lining surface area is bigger, stronger to the heat-transfer effect of workpiece.However, furnace body is high
Degree and width suffer from the restriction of objective condition, cannot infinitely increase the specification of heating furnace when building stove.For this purpose, the present inventor exists
Protrusion, also referred to as heat radiator are installed in hearth inner lining surface, to increase inner lining surface product, improve the radiation-emitting of heating furnace
Rate enhances heat transfer efficiency.
Fig. 1 is can refer to, before this, inventor installs heat radiator using the fixed mode of screw.Specifically, exist first
Then heat radiator 12 using screw 13 is fixedly mounted on 11 surface of liner, makes heat radiator 12 by 11 surface drilling of liner
It can hang below liner.
For conventional heating furnace, the installation of heat radiator is very big, and each heating furnace needs to install ten thousand.It adopts
With aforementioned method, on the one hand need to bore a large amount of hole in interior lining, the dust for the generation that drills is not fugitive in narrow burner hearth
It goes so that the working environment in burner hearth is severe, is not easy to construct；On the other hand, heating furnace is continuously in burner hearth at work
The condition of high temperature (a few supreme thousand degree of Baidu), air-flow constantly washes away heat radiator, and expands with heat and contract with cold and be also easy to make liner swollen because of heat
Expansive force and crack, heat radiator is caused to come off.
Utility model content
In order to solve the above technical problems, the application provides a kind of heating furnace hearth inner lining, to avoid drilling process and
Reduce coming off for heat radiator.
Specifically, in a first aspect, the application provides a kind of heating furnace hearth inner lining, including flame retardant coating, lug boss and anchoring
Brick, protrusion forms the lug boss inside a lateral burner hearth of the flame retardant coating, the lug boss and flame retardant coating one into
Type, one end of the anchored brick are embedded in from the opposite side of the flame retardant coating in the flame retardant coating, and the other end of the anchored brick is used
In the steel structure connection with heating furnace.
With reference to first aspect, in first aspect in the first possible realization method, the lug boss is truncated cone-shaped, circular cone
Shape, polygon pyramid, polygon prismatic table shape or hemispherical.
With reference to first aspect and above-mentioned possible realization method, in second of possible realization method of first aspect, bottom
End end face is recessed cavity, and the cavity is cylindrical, truncated cone-shaped or cone.
With reference to first aspect and above-mentioned possible realization method, in first aspect in the third possible realization method, when
When the cavity is truncated cone-shaped, diameter of the cavity on the end face of the lug boss bottom end is more than the cavity in the protrusion
Diameter inside portion；When the cavity is cone, the vertex of the cavity is located inside the lug boss.
With reference to first aspect, in the 4th kind of possible realization method of first aspect, the lug boss is in for concave side wall
The truncated cone-shaped of arc, and the lug boss is gradually reduced by top to bottom diameter.
The 4th kind of realization method with reference to first aspect, it is described resistance in the 5th kind of possible realization method of first aspect
Spacing H1 between fire bed upper projecting portion is about the 1/6-1/2 of lug boss top end face outer diameter H2.
The 5th kind of realization method with reference to first aspect, it is described convex in the 6th kind of possible realization method of first aspect
The bottom end end face in the portion of rising is recessed the cavity of semiellipse shape.
The 6th kind of realization method with reference to first aspect, it is described resistance in the 7th kind of possible realization method of first aspect
The surface of fire bed and the lug boss is coated with far infrared radiation coating.
With reference to first aspect and above-mentioned possible realization method, in the 8th kind of possible realization method of first aspect, institute
State the curved dilatation joint being provided on the flame retardant coating between lug boss through the flame retardant coating.
With reference to first aspect and above-mentioned possible realization method, in the 9th kind of possible realization method of first aspect, institute
The axis for stating lug boss is vertical with the flame retardant coating.
Heating furnace hearth inner lining in above-mentioned technical proposal is poured into a mould by integrally formed mode or ramming is formed with convex
The hearth inner lining in the portion of rising using lug boss as heat radiator, can increase inner lining surface product, improve the radiation-emitting of heating furnace
Rate enhances heat transfer efficiency.Thus it is possible, on the one hand, it can be avoided to avoid the transformation process of lining surface drilling installation heat radiator inside
Drilling operation destroys the situation of hearth inner lining, improves inner lining structure stability.On the other hand, due to lug boss and flame retardant coating
It is integrally formed, it is smaller that the high temperature in heating furnace washes away influence of the air-flow to lug boss；Used in lug boss and flame retardant coating
Material is identical, and therefore, no matter heating furnace is heated or cooled, and the coefficient of expansion of flame retardant coating and lug boss is identical, thus
It greatly reduces because the difference of coefficient of thermal expansion causes liner cracking or liner to squeeze the situation of broken connector (such as screw), into
And avoid the problem of heat radiator comes off.
In addition, using above-mentioned heating furnace hearth inner lining, drilling is omitted and the process of heat radiator is installed, after reducing
The engineering economy that burner hearth is brought is lost in phase construction, also shortens construction and the duration of burner hearth is transformed, reduce labor intensity.
Description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the mounting structure schematic diagram of heat radiator that inventor uses before this；
Fig. 2 is partial cross section's structure diagram of one embodiment of the heating furnace hearth inner lining of the application；
Fig. 3 is the fragmentary bottom structure diagram of one embodiment of the heating furnace hearth inner lining of the application；
Fig. 4 is partial cross section's structure diagram of second embodiment of the heating furnace hearth inner lining of the application；
Fig. 5 is partial cross section's structure diagram of the third embodiment of the heating furnace hearth inner lining of the application；
Fig. 6 is partial cross section's structure diagram of the 4th embodiment of the heating furnace hearth inner lining of the application.
Reference sign：
Fig. 1：Liner 11；Heat radiator 12；Screw 13；Clay layer 14.
Fig. 2 to Fig. 6：Flame retardant coating 21；Lug boss 22；Bottom end 221；Cavity 222；Axis 223；Top 224；Anchored brick 23；
One end 231 of anchored brick；The other end 232 of anchored brick；Dilatation joint 24.
Specific embodiment
It elaborates below to embodiments herein.In the description of the present application, it is to be understood that term
The orientation or position relationship of the instructions such as " on ", " under ", " top ", " bottom ", " interior ", " outer " are based on orientation shown in the drawings or position
Relationship, be for only for ease of simplified description rather than instruction imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not intended that limitation to the application.
The terms such as term " installation ", " connected ", " connection ", " fixation " should be interpreted broadly, for example, it may be fixed connect
It connects or is detachably connected or is integrally connected；Can be mechanical connection or electrical connection；It can be direct phase
Even, it can also be indirectly connected by intermediary, can be the connection inside two elements.For the ordinary skill people of this field
For member, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
It please refers to Fig.2 to Fig. 3, in one embodiment of the application, a kind of heating furnace hearth inner lining is provided, including fire resisting
Layer 21, lug boss 22 and anchored brick 23, protrusion forms lug boss 22 inside a lateral burner hearth of flame retardant coating 21, lug boss 22 with it is resistance to
Fire bed 21 is integrally formed, and one end 231 of anchored brick is from the opposite side insertion flame retardant coating 21 of flame retardant coating 21, the other end of anchored brick
232 are used to connect with the steel construction (not shown) of heating furnace.
Above-mentioned heating furnace hearth inner lining is in practice of construction, with the work progress of the liner of furnace roof for example, making first
The mold with the lower concave part to lower recess is performed, on mold, lower concave part is according to certain density, such as 45/m2, with square
The mode of battle array arranges.Lower concave part on mold can be truncated cone-shaped, cone, polygon pyramid, polygon prismatic table shape or hemispherical,
In addition to this, the other shapes such as cylinder, semielliptical shape be can also be.The size of lower concave part can be adjusted according to actual conditions
Whole, if for example, when lower concave part is truncated cone-shaped, the diameter of upper round table surface being relatively large in diameter can be 120mm, and diameter is smaller
The diameter of lower round table surface can be 80mm, the height of round platform can be 80-120mm.Lower concave part can be by die main body
It is directly stamped and formed out, can also be fixed on die main body plate by modes such as welding, the specific making of the application template on plate
Mode is not limited.
Then the other end of anchored brick 231 is fixedly connected with the crossbeam in the steel construction of heating furnace, so as to make anchored brick
23 hang under steel construction.The distance between two anchored bricks can be adjusted according to actual conditions, for example, anchor can be controlled
Gu the spacing between brick is 200mm-300mm.
Finally mold is erected at below heating-furnace top, is poured using refractory material or ramming is constructed so that
Form liner below furnace roof, one end 231 of anchored brick is embedded in flame retardant coating 21, the other end 232 then with steel structure connection.Until
After air-drying, shaping and demoulding, heating furnace hearth inner lining just completes.Wherein, the anchored brick of 21 inside of flame retardant coating will be in burner hearth
Lining is fixed below furnace roof, meanwhile, flame retardant coating 21 also has multiple integrally formed convex towards the side inside heating furnace burner hearth
Play portion 22.
Heating furnace hearth inner lining in the present embodiment is poured into a mould by integrally formed mode or ramming is formed with lug boss
22 hearth inner lining using lug boss 22 as heat radiator, can increase inner lining surface product, improve the radiation-emitting of heating furnace
Rate enhances heat transfer efficiency.Thus it is possible, on the one hand, it can be avoided to avoid the transformation process of lining surface drilling installation heat radiator inside
Drilling operation destroys the situation of hearth inner lining, improves inner lining structure stability.On the other hand, due to lug boss 22 and fire resisting
Layer 21 is integrally formed, and it is smaller that the high temperature in heating furnace washes away influence of the air-flow to lug boss 22；Lug boss 22 and flame retardant coating
Material used in 21 is identical, and therefore, no matter heating furnace is heated or cooled, the coefficient of expansion of flame retardant coating 21 and lug boss 22
Be it is identical, so as to greatly reduce because coefficient of thermal expansion difference cause liner crack or liner squeeze broken connector (such as
Screw) situation, and then avoid the problem of heat radiator comes off.
In addition, using above-mentioned heating furnace hearth inner lining, drilling is omitted and the process of heat radiator is installed, after reducing
The engineering economy that burner hearth is brought is lost in phase construction, also shortens construction and the duration of burner hearth is transformed, reduce labor intensity.
Different according to the shape of the lower concave part of mold, the shape of the lug boss of the liner of formation is different accordingly, lug boss
It can be truncated cone-shaped, cone, polygon pyramid, polygon prismatic table shape or hemispherical, can also be cylindrical, semielliptical shape in addition
Etc. other shapes.In one implementation, it please refers to Fig.2 to Fig. 5, Fig. 2, lug boss shown in Fig. 4 22 are truncated cone-shaped, Fig. 5
Shown lug boss 22 is semielliptical shape.For the lug boss of similary weight, hemispheric lug boss is than truncated cone-shaped, circular cone
The surface area bigger of the lug boss of the shapes such as shape, so heat transfer efficiency higher.And polygon prismatic table shape, polygon pyramid, such as six
Side prismatic table shape, three arris tapers etc. since its side has plane, so as to orienting reflex or emission of thermal radiation, make heating
Heat radiation in stove burner hearth, which can be oriented more, concentrates directive workpiece, further promotes heat-transfer effect.
In another implementation, other than above-mentioned shape, Fig. 6 is please referred to, lug boss 22 can also be side wall
The arc-shaped truncated cone-shaped of indent, and lug boss is gradually reduced by top to bottom diameter.Two lug bosses 22 on flame retardant coating 21
Between spacing H1 be about lug boss 22 224 end face outer diameter H2 of top 1/6-1/2.In 221 end face of bottom end of lug boss 22
Spill is into the cavity 222 of semiellipse shape.In addition, the surface of flame retardant coating 21 and lug boss 22 is also coated with far infrared radiation coating
(not shown).
Far infrared radiation coating herein using this field is existing, commercialized coatings capable of preventing from far infrared radiation coating and
Into.For the coatings capable of preventing from far infrared radiation specifically used, the application is not limited.
High temperature gas flow can constantly wash away lug boss to heating furnace at work, get off year in year out, easily make lug boss or resistance to
Fire bed Local Cracking causes lug boss to come off.Since in above-mentioned hearth inner lining, lug boss 22 is to be integrally formed with flame retardant coating 21
, once lug boss 22 is fallen off, the later stage can not integrally pour into a mould again when repairing, and general or needs bore on flame retardant coating 21
Hole carries out installation fixation using screw.This just needs heating furnace to stop normal work, into the trimming stage, influences normally to produce
Period causes economic loss.By using above structure, on the one hand far infrared radiation coating can further improve lug boss 22
Radiance, it is another aspect far infrared radiation coating high temperature resistant, corrosion-resistant, can be to the surface of lug boss 22 and flame retardant coating 21
Protective action is played on surface, prevents high temperature gas flow from directly impacting 21 surface of lug boss 22 and flame retardant coating.Concave side wall is arc-shaped
Truncated cone-shaped lug boss 22 and semiellipse shape cavity 222, certain buffering water conservancy diversion is played to the high temperature gas flow in heating furnace
Effect, decrease direct impact of the high temperature gas flow to lug boss 22 to a certain extent.Far infrared radiation coating, concave side wall
Arc-shaped truncated cone-shaped lug boss 22 and the cavity 222 of semiellipse shape reduce high temperature gas flow rushing to lug boss 22 jointly
Brush acts on, and so as to be further reduced the situation that airflow scouring causes the cracking of lug boss 22 to come off, promotes lug boss 22 and fire resisting
The structural stability of layer 21.
Further, protrusion can also be set among the lower concave part of mold so that the lug boss 22 of cast or ramming out
221 end face of bottom end be recessed cavity 222.By forming cavity 222, lug boss 22 is increased (it can be appreciated that hot spoke
Beam) reflective surface area, so as to improve the heat transfer efficiency of entire hearth inner lining.Meanwhile formation cavity 222 can also effectively subtract
The weight of few lug boss 22, reduces the load-bearing of flame retardant coating 21, further promotes the structural stability of entire hearth inner lining.Here
Cavity 222 can be for cylindrical, truncated cone-shaped or cone.When cavity 222 is cylindrical, the height of cavity and the ratio of radius
Value L/R>2.5.When cavity 222 is truncated cone-shaped, the cavity 222 in Fig. 5 is please referred to, cavity 222 is in 221 end face of lug boss bottom end
On diameter be more than diameter of the cavity 222 inside lug boss 22, that is to say, that the upper bottom surface of the cavity 222 of truncated cone-shaped it is straight
Diameter is less than the diameter of bottom surface.When cavity is cone, the vertex of cavity is located inside lug boss, that is to say, that cone
Cavity bottom surface on the bottom end end face of lug boss, the vertex of a cone is in the inside of lug boss.It is cylindrical, truncated cone-shaped or circle in cavity
In the case of taper, it is more convenient for demoulding after flame retardant coating and lug boss drying and moulding.
Further, it please refers to Fig.4 to Fig. 6, in the case where lug boss 22 has cavity 222,221 end of lug boss bottom end
There is cavities open (not marked in figure) on face.The axis 223 of lug boss 22 is vertical with flame retardant coating 21, so as to which cavities open be made to begin
Keep relatively parallel with flame retardant coating 21 eventually.For example, when furnace roof is plane, the cavities open on multiple lug bosses is all protected with furnace roof
Maintain an equal level row, it is understood that is parallel with flame retardant coating, and on same horizontal plane.In another example when heating furnace is arch
During heating furnace, furnace roof is curved surface, and the axis of multiple lug bosses is still vertical with the furnace roof of surface at this time, it is understood that be with
The flame retardant coating of surface is vertical, so as to which the cavities open of multiple lug boss bottoms be made to form a curved surface, this curved surface and furnace roof
Curved surface be parallel.
At work, liner is generally at a high temperature of several Baidu to thousands of degree heating furnace, it may occur that expansion.It is meanwhile interior
Lining is internal to generate thermal stress due to the presence of temperature change and temperature gradient, and liner is caused to split or peel off.Please refer to Fig.2 to
Fig. 3, by being provided with the curved dilatation joint 24 through flame retardant coating on the flame retardant coating 21 between two lug bosses 22 so that
Flame retardant coating 21 can discharge the thermal stress that flame retardant coating 21 is generated in thermal expansion by dilatation joint 24, whole so as to further be promoted
The structural stability of a hearth inner lining.It looks up and checks below from burner hearth, dilatation joint 24 is inside the close burner hearth of flame retardant coating 21
Linear is rendered as on the surface of side.And from the longitudinal cross-section of hearth inner lining, dilatation joint 24 is curvilinear, and from resistance to
Side inside the close burner hearth of fire bed 21 extends through the opposite side of flame retardant coating 21, as shown in Figure 2.For curved dilatation joint
24 amplitude being specifically bent, angle etc., the application is not restricted.
Just to refer each other for identical similar part between each embodiment in this specification.Above-described practicality is new
Type embodiment does not form the restriction to scope of protection of the utility model.
Claims (10)
1. a kind of heating furnace hearth inner lining, which is characterized in that including flame retardant coating (21), lug boss (22) and anchored brick (23), institute
It states protrusion inside a lateral burner hearth of flame retardant coating (21) and forms the lug boss (22), the lug boss (22) and the flame retardant coating
(21) it is integrally formed, one end (231) of the anchored brick (23) is embedded in the flame retardant coating from the opposite side of the flame retardant coating (21)
(21) in, the other end (232) of the anchored brick (23) is for the steel structure connection with heating furnace.
2. heating furnace hearth inner lining according to claim 1, which is characterized in that the lug boss (22) is truncated cone-shaped, circle
Taper, polygon pyramid, polygon prismatic table shape, hemispherical.
3. heating furnace hearth inner lining according to claim 1 or 2, which is characterized in that the bottom end of the lug boss (22)
(221) end face is recessed cavity (222), and the cavity (222) is cylindrical, truncated cone-shaped or cone.
4. heating furnace hearth inner lining according to claim 3, which is characterized in that when the cavity (222) is truncated cone-shaped,
Diameter of the cavity (222) on the bottom end of the lug boss (221) end face is more than the cavity (222) in the lug boss
(22) internal diameter；When the cavity (222) is cone, the vertex of the cavity (222) is located at the lug boss
(22) it is internal.
5. heating furnace hearth inner lining according to claim 1, which is characterized in that the lug boss (22) is in for concave side wall
The truncated cone-shaped of arc, and the lug boss (22) is gradually reduced by top (224) to bottom end (221) diameter.
6. heating furnace hearth inner lining according to claim 5, which is characterized in that flame retardant coating (21) upper projecting portion (22)
Between spacing H1 be the lug boss (22) top (224) end face outer diameter H2 1/6-1/2.
7. heating furnace hearth inner lining according to claim 6, which is characterized in that the bottom end (221) of the lug boss (22)
End face is recessed the cavity (222) of semiellipse shape.
8. heating furnace hearth inner lining according to claim 7, which is characterized in that the flame retardant coating (21) and the lug boss
(22) surface is coated with far infrared radiation coating.
9. heating furnace hearth inner lining according to claim 3, which is characterized in that described resistance between the lug boss (22)
The curved dilatation joint (24) through the flame retardant coating (21) is provided on fire bed (21).
10. heating furnace hearth inner lining according to claim 3, which is characterized in that the axis (223) of the lug boss (22)
It is vertical with the flame retardant coating (21).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721471348.4U CN207487415U (en) | 2017-11-07 | 2017-11-07 | A kind of heating furnace hearth inner lining |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721471348.4U CN207487415U (en) | 2017-11-07 | 2017-11-07 | A kind of heating furnace hearth inner lining |
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| CN207487415U true CN207487415U (en) | 2018-06-12 |
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ID=62475770
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| CN201721471348.4U Active CN207487415U (en) | 2017-11-07 | 2017-11-07 | A kind of heating furnace hearth inner lining |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945655A (en) * | 2019-03-26 | 2019-06-28 | 山东慧敏科技开发有限公司 | A kind of prefabricated section and furnace building process for strengthening heater for rolling steel radiant heat transfer |
| CN110181651A (en) * | 2019-06-12 | 2019-08-30 | 北京恩吉赛威节能科技有限公司 | The loose tool and its application method of furnace lining for moulding by casting with radiator |
| CN110595210A (en) * | 2019-09-16 | 2019-12-20 | 江苏瑞复达新材料有限公司 | Surface-modified pretreated fireproof anchoring brick and preparation process thereof |
| CN111595155A (en) * | 2020-04-20 | 2020-08-28 | 唐山钢铁集团有限责任公司 | Embedded installation method for energy-saving heat radiating body on top of heating furnace |
| CN112361820A (en) * | 2020-11-12 | 2021-02-12 | 江苏腾达环境工程有限公司 | Curved surface multi-angle radiation furnace roof structure |
-
2017
- 2017-11-07 CN CN201721471348.4U patent/CN207487415U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945655A (en) * | 2019-03-26 | 2019-06-28 | 山东慧敏科技开发有限公司 | A kind of prefabricated section and furnace building process for strengthening heater for rolling steel radiant heat transfer |
| CN110181651A (en) * | 2019-06-12 | 2019-08-30 | 北京恩吉赛威节能科技有限公司 | The loose tool and its application method of furnace lining for moulding by casting with radiator |
| CN110181651B (en) * | 2019-06-12 | 2020-10-13 | 北京恩吉赛威节能科技有限公司 | Moulding bed for casting furnace lining with radiator and using method thereof |
| CN110595210A (en) * | 2019-09-16 | 2019-12-20 | 江苏瑞复达新材料有限公司 | Surface-modified pretreated fireproof anchoring brick and preparation process thereof |
| CN111595155A (en) * | 2020-04-20 | 2020-08-28 | 唐山钢铁集团有限责任公司 | Embedded installation method for energy-saving heat radiating body on top of heating furnace |
| CN112361820A (en) * | 2020-11-12 | 2021-02-12 | 江苏腾达环境工程有限公司 | Curved surface multi-angle radiation furnace roof structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Heating furnace furnace inside lining Effective date of registration: 20190114 Granted publication date: 20180612 Pledgee: Bank of Beijing Zhongguancun branch, Limited by Share Ltd, Haidian Pledgor: BEIJING ENJI SAIWEI ENERGY-SAVING TECHNOLOGY CO., LTD. Registration number: 2019990000035 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |