CN109618548B - Composite shielding material for special vehicle - Google Patents

Composite shielding material for special vehicle Download PDF

Info

Publication number
CN109618548B
CN109618548B CN201811144350.XA CN201811144350A CN109618548B CN 109618548 B CN109618548 B CN 109618548B CN 201811144350 A CN201811144350 A CN 201811144350A CN 109618548 B CN109618548 B CN 109618548B
Authority
CN
China
Prior art keywords
parts
shielding layer
cavity
pouring
pouring cavity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201811144350.XA
Other languages
Chinese (zh)
Other versions
CN109618548A (en
Inventor
克磊
马云涛
韦江涛
壮新
唐小存
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhenjiang Huahe Equipment Co ltd
Original Assignee
Zhenjiang Huahe Equipment Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhenjiang Huahe Equipment Co ltd filed Critical Zhenjiang Huahe Equipment Co ltd
Priority to CN201811144350.XA priority Critical patent/CN109618548B/en
Publication of CN109618548A publication Critical patent/CN109618548A/en
Application granted granted Critical
Publication of CN109618548B publication Critical patent/CN109618548B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073Shielding materials
    • H05K9/0081Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H05K9/0088Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a plurality of shielding layers; combining different shielding material structure
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04Polysiloxanes
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073Shielding materials
    • H05K9/0081Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H05K9/009Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive fibres, e.g. metal fibres, carbon fibres, metallised textile fibres, electro-conductive mesh, woven, non-woven mat, fleece, cross-linked
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00241Physical properties of the materials not provided for elsewhere in C04B2111/00
    • C04B2111/00258Electromagnetic wave absorbing or shielding materials
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/18Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20Oxides; Hydroxides
    • C08K3/22Oxides; Hydroxides of metals
    • C08K2003/2296Oxides; Hydroxides of metals of zinc

Abstract

The invention provides a composite shielding material for special vehicles, which comprises an outer frame, wherein a cavity with a rectangular cross section is arranged in the outer frame, the top of the outer frame is provided with a first jack and a second jack which are parallel to each other, a first partition plate and a second partition plate respectively penetrate through the first jack and the second jack and are inserted into the cavity, the first partition plate and the second partition plate are respectively welded and fixed on the first jack and the second jack, the cavity is divided into a first pouring cavity, a second pouring cavity and a third pouring cavity by the first partition plate and the second partition plate, the first pouring cavity and the third pouring cavity are positioned at two sides of the second pouring cavity, the tops of the first pouring cavity, the second pouring cavity and the third pouring cavity are respectively provided with a pouring hole, a first shielding layer is filled in the first pouring cavity and the third pouring cavity, and a second shielding layer is filled in the second pouring cavity; the outer frame is made of stainless steel, and the first partition plate and the second partition plate are lead plates, so that the thickness is reduced, the dead weight is reduced, and the shielding effect is improved.

Description

Composite shielding material for special vehicle
Technical Field
The invention relates to a shielding material, in particular to a composite shielding material for special vehicles.
Background
The special vehicle for transporting electronic system and electric equipment has high requirement on the shielding performance of the carriage, the carriage door is an important component of the carriage, and the gap between the carriage door and the door frame is an important path for electromagnetic wave leakage. At present, the shielding is realized between the door of the car and the door frame through a shielding adhesive tape, the shielding effectiveness SE of the shielding door is only 50dB at most, along with the high-speed development and the wide application of electronic technology, electronic countermeasure and electronic interference are ubiquitous, and the requirements of effectively inhibiting strong electronic interference and protecting an electronic system and electrical equipment from being damaged cannot be met by the existing shielding door.
The patent '200920125566.1' discloses a carriage electromagnetic shielding door, which comprises a door body, a door frame and a door lock, wherein the door frame is fixedly arranged on a carriage framework, the door body is hinged with the door frame through a hinge assembly, the door lock comprises a lock shaft, a lock seat, an outer handle and an inner handle, and the inner handle and the outer handle are arranged on the door body through the lock shaft; the lock block is fixedly installed on the door frame, a frame groove is formed in the periphery of the front face of the door frame, the comb-shaped reeds are installed on the two side faces in the frame groove, a frame corresponding to the frame groove in the front face of the door frame is arranged on the periphery of the door body, and the comb-shaped reeds are also installed on the inner side face, corresponding to the door frame, of the door body.
Although the shielding door has the shielding effect, the shielding performance of the material for manufacturing the door body cannot meet the requirements of the modern society, and in order to increase the shielding effect, the thickness of the door body can be increased, the self weight is greatly increased, and the cost is increased.
Disclosure of Invention
Aiming at the problems, the invention provides the composite shielding material for the special vehicle, which reduces the thickness, lightens the self weight and improves the shielding effect.
The specific technical scheme is as follows:
a composite shielding material for special vehicles comprises an outer frame, wherein a cavity with a rectangular cross section is arranged in the outer frame, a first jack and a second jack are arranged at the top of the outer frame in parallel, a first partition plate and a second partition plate respectively penetrate through the first jack and the second jack and are inserted into the cavity, the first partition plate and the second partition plate are respectively welded and fixed on the first jack and the second jack, the cavity is divided into a first pouring cavity, a second pouring cavity and a third pouring cavity by the first partition plate and the second partition plate, the first pouring cavity and the third pouring cavity are positioned at two sides of the second pouring cavity, a pouring hole is respectively arranged at the top of the first pouring cavity, the top of the second pouring cavity and the top of the third pouring cavity, a first shielding layer is filled in the first pouring cavity and the top of the third pouring cavity, and a second shielding layer is filled in the second pouring cavity;
the outer frame is made of stainless steel, and the first partition plate and the second partition plate are lead plates.
Furthermore, the first shielding layer comprises the following components in parts by weight:
80-100 parts of cement, 10-20 parts of yellow sand, 5-25 parts of cellulose, 10-18 parts of graphite powder, 8-20 parts of silicon carbide, 15-30 parts of calcium carbonate, 10-20 parts of metal powder, 6-16 parts of stainless steel fiber and 40-70 parts of water.
Further, the preparation method of the first shielding layer comprises the following steps:
(1) mixing and stirring evenly 80-100 parts of cement, 10-20 parts of yellow sand and 40-70 parts of water according to parts by weight;
(2) continuously adding 5-25 parts of cellulose, 10-18 parts of graphite powder, 8-20 parts of silicon carbide and 15-30 parts of calcium carbonate, and stirring for 30-60 min;
(3) finally, 10-20 parts of metal powder and 6-16 parts of stainless steel fiber are added and stirred for 40-80min to obtain a first shielding layer mixture;
(4) and pouring the first shielding layer mixture into the second pouring cavity for solidification to obtain the first shielding layer.
Furthermore, the second shielding layer comprises the following components in parts by weight:
50-60 parts of epoxy resin, 100-120 parts of silicone rubber, 15-22 parts of silicon dioxide, 3-8 parts of zinc oxide, 5-10 parts of lactic acid, 20-26 parts of acetone and 15-30 parts of metal powder.
Further, the preparation method of the second shielding layer comprises the following steps:
(1) adding 50-60 parts of oxygen resin, 100-120 parts of silicon rubber, 15-22 parts of silicon dioxide, 3-8 parts of zinc oxide, 5-10 parts of lactic acid and 20-26 parts of acetone into a mixing roll for mixing according to parts by weight;
(2) after mixing, adding metal powder, mixing and stirring uniformly to obtain a second shielding layer mixture;
(3) and pouring the second shielding layer mixture into the first pouring cavity or the third pouring cavity, and solidifying to obtain the second shielding layer.
Further, the metal powder comprises the following components in percentage by weight: 8-12% of copper powder, 5-15% of iron powder, 30-38% of silver powder, 5-10% of nickel powder, 3-6% of aluminum powder and the balance of lead powder.
Furthermore, the thickness of the second shielding layer is at least twice that of the first shielding layer, and the thickness of the first shielding layer is equal to that of the third shielding layer.
The invention has the beneficial effects that:
according to the invention, the first casting cavity, the second casting cavity and the third casting cavity are separated by the lead plate in the stainless steel outer frame, the first shielding layer is filled in the first casting cavity and the third casting cavity, and the second shielding layer is filled in the second casting cavity, so that the thickness is reduced, the self weight is reduced, and the shielding effect is improved.
Drawings
FIG. 1 is a cross-sectional view of the present invention.
Reference numerals
The outer frame 1, the first jack 2, the second jack 3, the first partition plate 4, the second partition plate 5, the first pouring cavity 6, the second pouring cavity 7, the third pouring cavity 8, the first shielding layer 9 and the second shielding layer 10.
Detailed Description
In order to make the technical scheme of the invention clearer and clearer, the invention is further described with reference to the accompanying drawings, and any scheme obtained by carrying out equivalent replacement and conventional reasoning on the technical characteristics of the technical scheme of the invention falls into the protection scope of the invention.
Example one
As shown in the figure, the composite shielding material for the special vehicle comprises an outer frame 1, wherein a cavity with a rectangular cross section is arranged in the outer frame, a first jack 2 and a second jack 3 are arranged at the top of the outer frame in parallel, a first partition plate 4 and a second partition plate 5 penetrate through the first jack and the second jack respectively and are inserted into the cavity, the first partition plate and the second partition plate are fixedly welded on the first jack and the second jack respectively, the cavity is divided into a first pouring cavity 6, a second pouring cavity 7 and a third pouring cavity 8 by the first partition plate and the second partition plate, the first pouring cavity and the third pouring cavity are positioned at two sides of the second pouring cavity, the tops of the first pouring cavity, the second pouring cavity and the third pouring cavity are provided with a pouring hole respectively, a first shielding layer 9 is filled in the first pouring cavity and the third pouring cavity, and a second shielding layer 10 is filled in the second pouring cavity;
the outer frame is made of stainless steel, and the first partition plate and the second partition plate are lead plates.
The preparation method of the first shielding layer comprises the following steps:
(1) mixing and stirring 90 parts by weight of cement, 15 parts by weight of yellow sand and 60 parts by weight of water uniformly;
(2) continuously adding 15 parts of cellulose, 14 parts of graphite powder, 12 parts of silicon carbide and 22 parts of calcium carbonate, and stirring for 50 min;
(3) finally, adding 15 parts of metal powder and 12 parts of stainless steel fibers and stirring for 60min to obtain a first shielding layer mixture;
(4) and pouring the first shielding layer mixture into the second pouring cavity for solidification to obtain the first shielding layer.
The preparation method of the second shielding layer comprises the following steps:
(1) adding 55 parts of oxygen resin, 110 parts of silicon rubber, 20 parts of silicon dioxide, 6 parts of zinc oxide, 8 parts of lactic acid and 23 parts of acetone into a mixing roll according to parts by weight for mixing;
(2) after mixing, adding metal powder, mixing and stirring uniformly to obtain a second shielding layer mixture;
(3) and pouring the second shielding layer mixture into the first pouring cavity or the third pouring cavity, and solidifying to obtain the second shielding layer.
Further, the metal powder comprises the following components in percentage by weight: 10% of copper powder, 10% of iron powder, 35% of silver powder, 8% of nickel powder, 4% of aluminum powder and the balance of lead powder.
Furthermore, the thickness of the second shielding layer is twice that of the first shielding layer, and the thickness of the first shielding layer is equal to that of the third shielding layer.
Example two
The composite shielding material for special vehicles is different from the composite shielding material in the first embodiment in that:
the preparation method of the first shielding layer comprises the following steps:
(1) mixing and stirring 80 parts by weight of cement, 10 parts by weight of yellow sand and 40 parts by weight of water uniformly;
(2) continuously adding 5 parts of cellulose, 10 parts of graphite powder, 8 parts of silicon carbide and 15 parts of calcium carbonate, and stirring for 30 min;
(3) finally, 10 parts of metal powder and 6 parts of stainless steel fiber are added and stirred for 40min to obtain a first shielding layer mixture;
(4) and pouring the first shielding layer mixture into the second pouring cavity for solidification to obtain the first shielding layer.
The preparation method of the second shielding layer comprises the following steps:
(1) adding 50 parts of oxygen resin, 100 parts of silicon rubber, 15 parts of silicon dioxide, 3 parts of zinc oxide, 5 parts of lactic acid and 20 parts of acetone into a mixing roll according to parts by weight for mixing;
(2) after mixing, adding metal powder, mixing and stirring uniformly to obtain a second shielding layer mixture;
(3) and pouring the second shielding layer mixture into the first pouring cavity or the third pouring cavity, and solidifying to obtain the second shielding layer.
The metal powder comprises the following components in percentage by weight: 8% of copper powder, 5% of iron powder, 30% of silver powder, 5% of nickel powder, 3% of aluminum powder and the balance of lead powder.
EXAMPLE III
The composite shielding material for special vehicles is different from the composite shielding material in the first embodiment in that:
the preparation method of the first shielding layer comprises the following steps:
(1) mixing and stirring 100 parts of cement, 20 parts of yellow sand and 70 parts of water uniformly according to the parts by weight;
(2) continuously adding 25 parts of cellulose, 18 parts of graphite powder, 0 part of silicon carbide and 30 parts of calcium carbonate, and stirring for 60 min;
(3) finally, adding 20 parts of metal powder and 16 parts of stainless steel fibers and stirring for 80min to obtain a first shielding layer mixture;
(4) and pouring the first shielding layer mixture into the second pouring cavity for solidification to obtain the first shielding layer.
The preparation method of the second shielding layer comprises the following steps:
(1) adding 60 parts of oxygen resin, 120 parts of silicone rubber, 22 parts of silicon dioxide, 8 parts of zinc oxide, 10 parts of lactic acid and 26 parts of acetone into a mixing roll in parts by weight for mixing;
(2) after mixing, adding metal powder, mixing and stirring uniformly to obtain a second shielding layer mixture;
(3) and pouring the second shielding layer mixture into the first pouring cavity or the third pouring cavity, and solidifying to obtain the second shielding layer.
The metal powder comprises the following components in percentage by weight: 12% of copper powder, 15% of iron powder, 38% of silver powder, 10% of nickel powder, 6% of aluminum powder and the balance of lead powder.

Claims (3)

1. A composite shielding material for special vehicles is characterized by comprising an outer frame, wherein a cavity with a rectangular cross section is arranged in the outer frame, a first jack and a second jack are arranged in the top of the outer frame in parallel, a first partition plate and a second partition plate respectively penetrate through the first jack and the second jack and are inserted into the cavity, the first partition plate and the second partition plate are respectively welded and fixed on the first jack and the second jack, the cavity is divided into a first pouring cavity, a second pouring cavity and a third pouring cavity by the first partition plate and the second partition plate, the first pouring cavity and the third pouring cavity are positioned on two sides of the second pouring cavity, a pouring hole is respectively arranged at the top of the first pouring cavity, the second pouring cavity and the third pouring cavity, a first shielding layer is filled in the first pouring cavity and the third pouring cavity, and a second shielding layer is filled in the second pouring cavity;
the outer frame is made of stainless steel, and the first partition plate and the second partition plate are lead plates;
the first shielding layer comprises the following components in parts by weight:
80-100 parts of cement, 10-20 parts of yellow sand, 5-25 parts of cellulose, 10-18 parts of graphite powder, 8-20 parts of silicon carbide, 15-30 parts of calcium carbonate, 10-20 parts of metal powder, 6-16 parts of stainless steel fiber and 40-70 parts of water;
the preparation method of the first shielding layer comprises the following steps:
(1) mixing and stirring evenly 80-100 parts of cement, 10-20 parts of yellow sand and 40-70 parts of water according to parts by weight;
(2) continuously adding 5-25 parts of cellulose, 10-18 parts of graphite powder, 8-20 parts of silicon carbide and 15-30 parts of calcium carbonate, and stirring for 30-60 min;
(3) finally, 10-20 parts of metal powder and 6-16 parts of stainless steel fiber are added and stirred for 40-80min to obtain a first shielding layer mixture;
(4) pouring the first shielding layer mixture into a second pouring cavity for solidification to obtain a first shielding layer;
the second shielding layer comprises the following components in parts by weight:
50-60 parts of epoxy resin, 100-120 parts of silicone rubber, 15-22 parts of silicon dioxide, 3-8 parts of zinc oxide, 5-10 parts of lactic acid, 20-26 parts of acetone and 15-30 parts of metal powder;
the preparation method of the second shielding layer comprises the following steps:
(1) adding 50-60 parts of oxygen resin, 100-120 parts of silicon rubber, 15-22 parts of silicon dioxide, 3-8 parts of zinc oxide, 5-10 parts of lactic acid and 20-26 parts of acetone into a mixing roll for mixing according to parts by weight;
(2) after mixing, adding metal powder, mixing and stirring uniformly to obtain a second shielding layer mixture;
(3) and pouring the second shielding layer mixture into the first pouring cavity or the third pouring cavity, and solidifying to obtain the second shielding layer.
2. A composite shielding material for specialty vehicles as claimed in claim 1 wherein said metal powder comprises in weight percent: 8-12% of copper powder, 5-15% of iron powder, 30-38% of silver powder, 5-10% of nickel powder, 3-6% of aluminum powder and the balance of lead powder.
3. A composite shielding material for specialty vehicles as claimed in claim 1 wherein the thickness of the second shielding layer is at least twice the thickness of the first shielding layer, the thickness of the first shielding layer being equal to the thickness of the third shielding layer.
CN201811144350.XA 2018-09-29 2018-09-29 Composite shielding material for special vehicle Active CN109618548B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811144350.XA CN109618548B (en) 2018-09-29 2018-09-29 Composite shielding material for special vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811144350.XA CN109618548B (en) 2018-09-29 2018-09-29 Composite shielding material for special vehicle

Publications (2)

Publication Number Publication Date
CN109618548A CN109618548A (en) 2019-04-12
CN109618548B true CN109618548B (en) 2020-09-15

Family

ID=66001970

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811144350.XA Active CN109618548B (en) 2018-09-29 2018-09-29 Composite shielding material for special vehicle

Country Status (1)

Country Link
CN (1) CN109618548B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104647823A (en) * 2013-11-25 2015-05-27 中国兵器工业第五二研究所 Shock-resistant energy-absorbing material and preparation method thereof
CN205755265U (en) * 2016-07-01 2016-11-30 中国工程物理研究院流体物理研究所 Shield and screening arrangement
CN106193958A (en) * 2016-08-01 2016-12-07 陆坤 A kind of preparation method of aluminum alloy sound insulation door
CN106930466A (en) * 2017-03-20 2017-07-07 肖文华 One kind electromagnetic shielding wallboard and its manufacture method
KR101875500B1 (en) * 2016-07-20 2018-07-06 한상녀 Inner filler used for improve heat resistance of fire door

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104647823A (en) * 2013-11-25 2015-05-27 中国兵器工业第五二研究所 Shock-resistant energy-absorbing material and preparation method thereof
CN205755265U (en) * 2016-07-01 2016-11-30 中国工程物理研究院流体物理研究所 Shield and screening arrangement
KR101875500B1 (en) * 2016-07-20 2018-07-06 한상녀 Inner filler used for improve heat resistance of fire door
CN106193958A (en) * 2016-08-01 2016-12-07 陆坤 A kind of preparation method of aluminum alloy sound insulation door
CN106930466A (en) * 2017-03-20 2017-07-07 肖文华 One kind electromagnetic shielding wallboard and its manufacture method

Also Published As

Publication number Publication date
CN109618548A (en) 2019-04-12

Similar Documents

Publication Publication Date Title
KR101376602B1 (en) Electromagnetic wave shielding fe-cu foil and manufacturing method for the same
CN109618548B (en) Composite shielding material for special vehicle
CN101559652A (en) Wind turbine blade with an integrated lightning conductor and method for manufacturing the same
EP1840910B1 (en) Magnetic schield in the end area of the stator of a three-pnase generator
CN102220945A (en) Method for manufacturing a wind turbine rotor blade and wind turbine rotor blade
CN102781207B (en) Cover structure and manufacturing method thereof
CN202396134U (en) Six-side shielded encapsulation box
CN201985233U (en) Active antenna
CN101620927B (en) Production method of all-silicon rubber outdoor mutual inductor
CN201369229Y (en) Transformer box used for railway communication signals
CN102623123B (en) Method for manufacturing mu 125 sendust cores
CN106544551A (en) A kind of aluminum alloy materials for manufacturing aluminium alloy power cable connection gold utensil
CN110068904A (en) Cable splice closure
CN205319495U (en) Mold processing of automobile -used pencil
CN208923234U (en) A kind of composite material battery box cover
CN212569788U (en) RFID card reader
CN205367439U (en) Elevator composite counter -weight block
CN205546411U (en) Be used for motor and electromagnetic shield membrane of controller and contain its new energy automobile thereof
CN210737893U (en) Hardening anti-collision PC board
CN202913916U (en) Connection structure of steel ventilating window and aluminum shielding cavity
CN210429361U (en) Anti-corrosion cable
CN208191137U (en) A kind of anti-electromagneticinterference interference system of crusing robot
CN205367428U (en) Elevator counterweight block
CN102544680A (en) Method for improving passive intermodulation of microwave device
CN211248232U (en) Large-scale wind power base is along with shape sand box

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant