CN112295377B - Power equipment condensation dehydrating unit - Google Patents
Power equipment condensation dehydrating unit Download PDFInfo
- Publication number
- CN112295377B CN112295377B CN202011535274.2A CN202011535274A CN112295377B CN 112295377 B CN112295377 B CN 112295377B CN 202011535274 A CN202011535274 A CN 202011535274A CN 112295377 B CN112295377 B CN 112295377B
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- China
- Prior art keywords
- power equipment
- plate
- hole
- condenser pipe
- water storage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
The invention discloses a power equipment condensation and dehumidification device, and particularly relates to the technical field of power equipment. The dehumidification device is convenient to install and fix on the electric power equipment, is convenient for stable work, condenses the humidity in the air in the space of the electric power equipment into liquid water through condensation and dehumidification, and discharges the liquid water to the outside of the space of the electric power equipment, so that the original air humidity can not be recovered, the dehumidification effect can be greatly improved, and the defect that the original air humidity can be recovered after the temperature of superheated steam in heating dehumidification is reduced is overcome.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to a condensation and dehumidification device for power equipment.
Background
Environmental humidity is an important factor that influences power equipment normal work, and air humidity is too big, and equipment surface moisture that condenses causes mould to breed and accelerates, makes electrical insulation intensity reduce, and metal corrosion accelerates to lead to the contact surface oxidation, and contact resistance increases, and a minor failure just can cause the large tracts of land to stop production, brings great loss for the enterprise, for the convenience of power equipment's dehumidification, consequently, we have proposed a power equipment condensation dehydrating unit to solve the problem that faces in the trade.
Disclosure of Invention
In order to overcome the above drawbacks of the prior art, embodiments of the present invention provide a power equipment condensation and dehumidification device to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme: a power equipment condensation dehumidifying device comprises a power equipment shell, wherein a dehumidifying hole is formed in one side of the power equipment shell, an air cooler is installed at the upper end of the power equipment shell, a cold air conveying hose is installed on one side of the air cooler, a condensing pipe is arranged at one end, far away from the air cooler, of the cold air conveying hose in a through mode, the condensing pipe penetrates through the dehumidifying hole and extends to the inner side of the power equipment shell, a hole pasting plate is fixedly sleeved on one end, close to the condensing pipe, of the cold air conveying hose, a water storage plate is fixedly installed on one side, close to the power equipment shell, of the hole pasting plate and located below the condensing pipe, a water storage tank is formed in the water storage plate, an air vent is formed in one side, far away from the cold air conveying hose, of the air vent is installed in the air vent, the air return hose penetrates through the hole pasting plate and extends to the outer side of the power equipment shell, a through hole is formed in the hole pasting plate, and a miniature negative pressure machine is arranged in the ventilation opening.
In a preferred embodiment, two support rods are fixedly and symmetrically arranged on the water storage plate and positioned on two sides of the water storage tank, a pipe clamping plate is arranged at one side, close to the condensation pipe, of the upper end of each support rod, and the condensation pipe is fixed above the water storage plate through the pipe clamping plate.
In a preferred embodiment, an adjusting rod is fixedly installed on one side, away from the hole sticking plate, of the water storage plate, a lifting adjusting groove is formed in the adjusting rod, and a lifting motor is fixedly installed below the lifting adjusting groove in the adjusting rod.
In a preferred embodiment, the output end of the lifting motor extends to the inner side of the lifting adjusting groove and is fixedly connected with a multi-stage telescopic rod through a coupler, and one end, far away from the lifting motor, of the multi-stage telescopic rod is fixedly provided with a threaded rod.
In a preferred embodiment, a circular plate is fixedly installed in the lifting adjusting groove, a threaded hole is formed in the middle of the circular plate, and the threaded rod penetrates through the threaded hole and is in threaded connection with the threaded hole.
In a preferred embodiment, the upper end of the threaded rod is rotatably provided with a vertical rod, two limiting slide clamping grooves are symmetrically formed in the adjusting rod and positioned on two sides of the lifting adjusting groove, two limiting slide clamping blocks are symmetrically arranged on two sides of the lower end of the vertical rod, and the limiting slide clamping blocks are matched with the limiting slide clamping grooves and movably connected with the limiting slide clamping grooves.
In a preferred embodiment, a rotating groove is formed in the upper end of the vertical rod, a rotating motor is fixedly mounted in the rotating groove, a rod seat is fixedly mounted at the output end of the rotating motor, an electric telescopic rod is fixedly mounted at one end, far away from the vertical rod, of the rod seat, and a pressing plate is fixedly mounted at one end, far away from the rotating motor, of the electric telescopic rod.
In a preferred embodiment, a handle is fixedly mounted on the patch panel.
In a preferred embodiment, a binding belt is installed between the return air hose and the condensation pipe, and the return air hose and the condensation pipe are fixedly connected through the binding belt.
The invention has the technical effects and advantages that:
compared with the prior art, the invention pastes the pore pasting plate on the outer side of the dehumidification hole of the power equipment shell, the structures of the condensation pipe, the water storage plate and the like extend into the power equipment shell, cold air enters the condensation pipe under the action of an air cooler, moisture in the power equipment shell contacts the condensation pipe, water vapor in the water vapor forms small water drops on the condensation pipe and flows into a water storage tank of the water storage plate, air in the power equipment shell can be sucked to the vicinity of the condensation pipe through the miniature negative pressure machine arranged on the pore pasting plate, more moisture contacts the condensation pipe, the dehumidification effect is better, a vertical rod in an adjusting rod arranged on the water storage plate can be lifted, the vertical rod extends out after the adjusting rod passes through the dehumidification hole and extends into the power equipment shell, then the rod base is driven to rotate by the rotating motor, the pressing plate faces to one side of the pore pasting plate, and then the pressing plate presses the inner wall of the power equipment shell through the electric telescopic rod, carry power equipment casing lateral wall inside and outside along with the orifice plate, it is downthehole to make the dehumidification structure fix and dehumidify, drive multistage telescopic link through elevator motor in proper order when adjusting the height of pole setting, the threaded rod rotates, through the interact of threaded rod with the screw hole, it goes up and down to drive the threaded rod, and then drive the lift of pole setting, this dehydrating unit is convenient for the installation on power equipment fixed, be convenient for its stable work, and dehumidify through the condensation, with the humidity in the air in the power equipment space, the condensation has become "liquid water", discharged outside the power equipment space, original air humidity can not resume again, can greatly increased dehumidification effect like this, and overheated steam after the temperature reduction in the heating dehumidification has been solved, still can resume original air humidity's drawback.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic view of the structure of the condenser tube of the present invention.
Fig. 3 is a schematic structural view of the patch panel of the present invention.
Fig. 4 is a schematic structural view of an adjusting lever according to the present invention.
Fig. 5 is a schematic structural view of the vertical rod of the present invention.
The reference signs are: 1. a power equipment housing; 2. a dehumidification hole; 3. an air cooler; 4. a cold air delivery hose; 5. pasting a hole plate; 6. a condenser tube; 7. an air return hose; 8. binding a belt; 9. a ventilation opening; 10. a miniature negative pressure machine; 11. a water storage plate; 12. a water storage tank; 13. a support bar; 14. a tube clamp plate; 15. adjusting a rod; 16. a lifting adjusting groove; 17. a lifting motor; 18. a multi-stage telescopic rod; 19. a threaded rod; 20. a circular plate; 21. a threaded hole; 22. erecting a rod; 23. a rotating tank; 24. a rotating electric machine; 25. a rod seat; 26. an electric telescopic rod; 27. pressing a plate; 28. a limiting slide clamping groove; 29. a limiting slide fixture block; 30. a handle; 31. and (4) a vent hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in the attached figures 1-5, the power equipment condensation and dehumidification device comprises a power equipment shell 1, wherein one side of the power equipment shell 1 is provided with a dehumidification hole 2, the upper end of the power equipment shell 1 is provided with an air cooler 3, one side of the air cooler 3 is provided with a cold air conveying hose 4, one end, away from the air cooler 3, of the cold air conveying hose 4 is provided with a condenser pipe 6 in a through manner, the condenser pipe 6 penetrates through the dehumidification hole 2 and extends to the inner side of the power equipment shell 1, one end, close to the condenser pipe 6, of the cold air conveying hose 4 is fixedly provided with a hole pasting plate 5, one side, close to the power equipment shell 1, of the hole pasting plate 5 is fixedly provided with a water storage plate 11 below the condenser pipe 6, the water storage plate 11 is provided with a water storage tank 12, one side, away from the cold air conveying hose 4, of the condenser pipe 6 is provided with an air vent 31, the air return hose 7 is arranged on the air vent 31, and the air return hose 7 penetrates through the hole pasting plate 5 and extends to the outer side of the power equipment shell 1, the hole sticking plate 5 is provided with a ventilation opening 9, and a miniature negative pressure machine 10 is arranged in the ventilation opening 9.
Furthermore, the two supporting rods 13 are symmetrically and fixedly arranged on the two sides of the water storage tank 12 on the water storage plate 11, the upper ends of the supporting rods 13 are close to one side of the condenser pipe 6, and the pipe clamping plate 14 is arranged on the upper end of each supporting rod, and the condenser pipe 6 is fixed above the water storage plate 11 through the pipe clamping plate 14.
Furthermore, an adjusting rod 15 is fixedly installed on one side, away from the hole sticking plate 5, of the water storage plate 11, a lifting adjusting groove 16 is formed in the adjusting rod 15, and a lifting motor 17 is fixedly installed below the lifting adjusting groove 16 in the adjusting rod 15.
Further, the output end of the lifting motor 17 extends to the inner side of the lifting adjusting groove 16 and is fixedly connected with a multi-stage telescopic rod 18 through a coupler, and a threaded rod 19 is fixedly mounted at one end, far away from the lifting motor 17, of the multi-stage telescopic rod 18.
Furthermore, a circular plate 20 is fixedly mounted in the lifting adjusting groove 16, a threaded hole 21 is formed in the middle of the circular plate 20, the threaded rod 19 penetrates through the threaded hole 21 and is in threaded connection with the threaded hole 21, the multi-stage telescopic rod 18 and the threaded rod 19 are sequentially driven to rotate through the lifting motor 17 when the height of the vertical rod 22 is adjusted, and the threaded rod 19 is driven to lift through interaction between the threaded rod 19 and the threaded hole 21, so that the vertical rod 22 is driven to lift.
Furthermore, the upper end of the threaded rod 19 is rotatably provided with a vertical rod 22, two limiting slide clamp grooves 28 are symmetrically formed in the adjusting rod 15 and located on two sides of the lifting adjusting groove 16, two limiting slide clamp blocks 29 are symmetrically arranged on two sides of the lower end of the vertical rod 22, the limiting slide clamp blocks 29 are matched with the limiting slide clamp grooves 28 and movably connected with the limiting slide clamp grooves 28, and the limiting slide clamp blocks 29 and the limiting slide clamp grooves 28 can prevent the vertical rod 22 from rotating along with the threaded rod 19 during lifting.
Further, the swivelling chute 23 has been seted up to pole setting 22 upper end, fixed mounting has rotating electrical machines 24 in the swivelling chute 23, 24 output end fixed mounting of rotating electrical machines has pole socket 25, pole socket 25 is kept away from pole setting 22 one end fixed mounting has electric telescopic handle 26, electric telescopic handle 26 is kept away from 24 one end fixed mounting of rotating electrical machines has clamp plate 27, after adjusting pole 15 and passing dehumidification hole 2 and stretch into power equipment casing 1's inside, extend pole setting 22, then drive pole socket 25 through rotating electrical machines 24 and rotate, make clamp plate 27 towards 5 one sides of subsides orifice plate, then make clamp plate 27 push down 1 inner wall of power equipment casing through electric telescopic handle 26, clip 1 lateral wall of power equipment casing inside and outside together with subsides orifice plate 5, make the dehumidification structure fix in dehumidification hole 2.
Further, a handle 30 is fixedly mounted on the hole pasting plate 5, and the handle 30 facilitates mounting and moving of the hole pasting plate 5.
Furthermore, a binding belt 8 is arranged between the return air hose 7 and the condenser pipe 6, and the return air hose 7 and the condenser pipe 6 are fixedly connected through the binding belt 8.
The working principle of the invention is as follows: the orifice plate 5 is attached to the outer side of the dehumidification hole 2 of the power equipment housing 1, at this time, the structures such as the condensation pipe 6 and the water storage plate 11 extend into the power equipment housing 1, cold air enters the condensation pipe 6 under the action of the air cooler 3, at this time, moisture in the power equipment housing 1 contacts the condensation pipe 6, water vapor in the water vapor can form small water drops on the condensation pipe 6 and flows into the water storage tank 12 of the water storage plate 11, air in the power equipment housing 1 can be sucked to the vicinity of the condensation pipe 6 through the miniature negative pressure machine 10 installed on the orifice plate 5, so that more moisture contacts the condensation pipe 6, the dehumidification effect is better, the upright rod 22 in the adjusting rod 15 installed on the water storage plate 11 can be lifted, when the adjusting rod 15 penetrates through the dehumidification hole 2 and extends into the power equipment housing 1, the upright rod 22 extends out, then the rod seat 25 is driven by the rotary motor 24 to rotate, so that the pressing plate 27 faces one side of the orifice plate 5, then the pressure plate 27 presses the inner wall of the power equipment shell 1 through the electric telescopic rod 26, the side wall of the power equipment shell 1 is clamped inside and outside together with the hole pasting plate 5, the dehumidification structure is fixed in the dehumidification hole 2, the multistage telescopic rod 18 and the threaded rod 19 are sequentially driven to rotate through the lifting motor 17 when the height of the upright rod 22 is adjusted, the threaded rod 19 is driven to lift through the interaction of the threaded rod 19 and the threaded hole 21, thereby driving the vertical rod 22 to lift, the dehumidifying device is convenient to be installed and fixed on the electrical equipment, is convenient to work stably, and the humidity in the air in the power equipment space is condensed into liquid water through condensation and dehumidification, the liquid water is discharged to the outside of the power equipment space, the original air humidity can not be recovered, thus the dehumidification effect can be greatly increased, and the defect that the original air humidity can be recovered after the temperature of the superheated steam is reduced in heating and dehumidifying is overcome.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (9)
1. A power equipment condensation and dehumidification device comprises a power equipment shell (1), and is characterized in that: the power equipment is characterized in that a dehumidification hole (2) is formed in one side of a power equipment shell (1), an air cooler (3) is installed at the upper end of the power equipment shell (1), a cold air conveying hose (4) is installed on one side of the air cooler (3), one end, far away from the air cooler (3), of the cold air conveying hose (4) is communicated with a condenser pipe (6), the condenser pipe (6) penetrates through the dehumidification hole (2) and extends to the inner side of the power equipment shell (1), a hole pasting plate (5) is fixedly arranged at one end, close to the condenser pipe (6), of the cold air conveying hose (4), a water storage plate (11) is fixedly installed below the condenser pipe (6) on one side, close to the power equipment shell (1), of the hole pasting plate (5), a water storage tank (12) is formed in the water storage plate (11), and an air vent (31) is formed in one side, far away from the cold air conveying hose (4), of the condenser pipe (6), install return air hose (7) on air vent (31), return air hose (7) run through laminated board (5) and extend to power equipment casing (1) outside, air vent (9) have been seted up on laminated board (5), install miniature negative pressure machine (10) in air vent (9).
2. The power equipment condensation and dehumidification device according to claim 1, wherein: the utility model discloses a condenser, including condenser pipe (6), water storage plate (11), bracing piece (13) that the quantity is two are installed to the fixed symmetry in aqua storage tank (12) both sides above water storage plate (11), bracing piece (13) upper end is close to condenser pipe (6) one side and installs tube splint (14), condenser pipe (6) are fixed in water storage plate (11) top through tube splint (14).
3. The power equipment condensation and dehumidification device according to claim 2, wherein: the water storage plate (11) is far away from one side of the hole pasting plate (5) and is fixedly provided with an adjusting rod (15), a lifting adjusting groove (16) is formed in the adjusting rod (15), and a lifting motor (17) is fixedly arranged in the adjusting rod (15) and below the lifting adjusting groove (16).
4. The power equipment condensation and dehumidification device according to claim 3, wherein: the output end of the lifting motor (17) extends to the inner side of the lifting adjusting groove (16) and is connected with a multi-stage telescopic rod (18) through a coupler fixed mounting, and the multi-stage telescopic rod (18) is far away from one end of the lifting motor (17) and is fixedly provided with a threaded rod (19).
5. The power equipment condensation and dehumidification device according to claim 4, wherein: the lifting adjusting groove (16) is internally and fixedly provided with a circular plate (20), a threaded hole (21) is formed in the middle of the circular plate (20), and the threaded rod (19) penetrates through the threaded hole (21) and is in threaded connection with the threaded hole (21).
6. The power equipment condensation and dehumidification device according to claim 5, wherein: threaded rod (19) upper end is rotated and is installed pole setting (22), be located lift adjustment groove (16) bilateral symmetry in adjusting pole (15) and seted up quantity and be two spacing draw-in groove (28), pole setting (22) lower extreme bilateral symmetry installs quantity and is two spacing fixture block (29), spacing fixture block (29) and spacing draw-in groove (28) phase-match and activity link up.
7. The power equipment condensation and dehumidification device according to claim 6, wherein: the rotating groove (23) has been seted up to pole setting (22) upper end, fixed mounting has rotating electrical machines (24) in rotating groove (23), rotating electrical machines (24) output end fixed mounting has pole socket (25), pole setting (22) one end fixed mounting has electric telescopic handle (26) is kept away from in pole socket (25), rotating electrical machines (24) one end fixed mounting is kept away from in electric telescopic handle (26) has clamp plate (27).
8. The power equipment condensation and dehumidification device according to claim 7, wherein: and a handle (30) is fixedly arranged on the hole pasting plate (5).
9. The power equipment condensation and dehumidification device according to claim 8, wherein: install ribbon (8) between return air hose (7) and condenser pipe (6), through ribbon (8) fixed connection between return air hose (7) and condenser pipe (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011535274.2A CN112295377B (en) | 2020-12-23 | 2020-12-23 | Power equipment condensation dehydrating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011535274.2A CN112295377B (en) | 2020-12-23 | 2020-12-23 | Power equipment condensation dehydrating unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112295377A CN112295377A (en) | 2021-02-02 |
| CN112295377B true CN112295377B (en) | 2022-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011535274.2A Active CN112295377B (en) | 2020-12-23 | 2020-12-23 | Power equipment condensation dehydrating unit |
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| Country | Link |
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| CN (1) | CN112295377B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425372A (en) * | 2019-07-30 | 2019-11-08 | 南京兆能节能科技有限公司 | A kind of pre- apparatus for heat sealing of circumferential extension formula being easily installed and its application method |
| CN209662660U (en) * | 2019-03-22 | 2019-11-22 | 江西森源电力股份有限公司 | A kind of dehumidification by condensation system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2225194A1 (en) * | 1973-04-11 | 1974-11-08 | Foursin Pierre | Filter element for gas partic. as cigarette filter tip - uses contraction of gas passage to form condensate for absorption |
| CN102856825B (en) * | 2012-10-15 | 2015-06-03 | 江苏省电力公司常州供电公司 | Electric cabinet dehumidifier and dehumidifying method thereof |
| CN107579435B (en) * | 2017-09-29 | 2019-04-26 | 海南电网有限责任公司东方供电局 | A kind of dehumidification device for terminal box |
-
2020
- 2020-12-23 CN CN202011535274.2A patent/CN112295377B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209662660U (en) * | 2019-03-22 | 2019-11-22 | 江西森源电力股份有限公司 | A kind of dehumidification by condensation system |
| CN110425372A (en) * | 2019-07-30 | 2019-11-08 | 南京兆能节能科技有限公司 | A kind of pre- apparatus for heat sealing of circumferential extension formula being easily installed and its application method |
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| CN112295377A (en) | 2021-02-02 |
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