CN111817189B - Maintenance device for power distribution cabinet - Google Patents
Maintenance device for power distribution cabinet Download PDFInfo
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- CN111817189B CN111817189B CN202010664009.8A CN202010664009A CN111817189B CN 111817189 B CN111817189 B CN 111817189B CN 202010664009 A CN202010664009 A CN 202010664009A CN 111817189 B CN111817189 B CN 111817189B
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- elastic sleeve
- sleeve
- maintenance device
- maintenance
- elastic
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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
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
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- Power Engineering (AREA)
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Abstract
The invention discloses a maintenance device for a power distribution cabinet, and relates to the technical field of power distribution equipment maintenance. This maintenance device for switch board includes: the elastic sleeve is an insulating transparent sleeve; the strutting mechanism comprises two strutting pieces arranged in the elastic sleeve and a driving assembly in transmission connection with at least one of the two strutting pieces, wherein the driving assembly can drive the two strutting pieces to be away from each other so as to strut and extend the elastic sleeve, the wall thickness of the elastic sleeve is thinned to form an insulating transparent film, and the driving assembly can drive the two strutting pieces to be close to each other so as to restore the elastic sleeve. When the power distribution cabinet is in a starting state for electrified maintenance, the elastic sleeve is arranged in front of the component to be maintained, the elastic sleeve can be spread by the spreading mechanism to form the insulating transparent film, so that a maintenance worker can touch the component and maintain the component through the insulating transparent film, and the insulation between the maintenance worker and the component is ensured. Meanwhile, the insulating transparent film is extremely thin, so that the perception of maintenance personnel on the components is basically not influenced, and the operation is convenient.
Description
Technical Field
The invention relates to the technical field of maintenance of power distribution equipment, in particular to a maintenance device for a power distribution cabinet.
Background
The panel of the power distribution cabinet is provided with primary elements such as an air switch, a knife switch, a contactor and a thermal relay, and secondary elements such as a voltmeter, an ammeter, a change-over switch, an indicator light and a button. Secondary elements such as an intermediate relay and a time relay, and auxiliary accessories such as a lead, a terminal and a fuse wire are arranged in the power distribution cabinet. In addition, many power distribution cabinets are also provided with PLCs, frequency converters and the like.
When maintaining some components and parts in the switch board, because the running state of these components and parts need clearly to be judged, so need carry out electrified maintenance under switch board boot state many times. In this case, although the component has an insulating case, there is a possibility of leakage when a maintenance worker touches the component, and safety is poor. If maintenance personnel wear insulating gloves, the perception of the maintenance personnel on the components can be seriously influenced, and the operation is very inconvenient.
Therefore, a maintenance device for a power distribution cabinet is needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a maintenance device for a power distribution cabinet, which can ensure the insulation between maintenance personnel and components when the power distribution cabinet is in a power-on state for live maintenance, simultaneously reduces the influence on the perception of the maintenance personnel on the components and is convenient to operate.
In order to achieve the purpose, the invention adopts the following technical scheme:
a maintenance device for a power distribution cabinet includes:
the elastic sleeve is an insulating transparent sleeve;
the strutting mechanism comprises two strutting pieces and a driving assembly in transmission connection with at least one of the strutting pieces, wherein the two strutting pieces are arranged in the elastic sleeve, the driving assembly is configured to drive the two strutting pieces to be away from each other so as to strut and extend the elastic sleeve, the wall thickness of the elastic sleeve is thinned to form an insulating transparent film for covering the surface of an element to be maintained, and the driving assembly is configured to drive the two strutting pieces to be close to each other so as to restore the elastic sleeve.
Optionally, the driving assembly includes a bidirectional hydraulic cylinder, and two output ends of the bidirectional hydraulic cylinder are respectively connected with the two spreading pieces in a one-to-one correspondence manner to drive the two spreading pieces to be away from or close to each other.
Optionally, the drive assembly is a remote-controlled drive assembly.
Optionally, the elastic sleeve is an elastic sleeve, the two struts are configured to be capable of moving away from each other in a radial direction of the elastic sleeve to strut and extend the elastic sleeve, and the two struts are configured to be capable of moving close to each other in the radial direction of the elastic sleeve to restore the elastic sleeve.
Optionally, the two struts are configured to be simultaneously movable in the axial direction of the elastic tube sleeve to change the strut position.
Optionally, the maintenance device for the power distribution cabinet further comprises a movable frame, and the elastic sleeve is fixed on the movable frame.
Optionally, the expansion part of the elastic sleeve is arranged between the first end of the elastic sleeve and the second end of the elastic sleeve;
the movable frame is provided with two rotating shafts, the two rotating shafts are arranged at intervals to contain the opening positions of the elastic sleeves, the first ends of the elastic sleeves are wound on one rotating shaft, and the second ends of the elastic sleeves are wound on the other rotating shaft.
Optionally, the movable frame includes an insulating plate, and an avoidance hole is formed in the insulating plate at a mounting position of the elastic sleeve.
Optionally, an illuminating mechanism is disposed outside the elastic sleeve, and an irradiation direction of the illuminating mechanism is disposed toward the stretching portion of the elastic sleeve.
Optionally, a heating mechanism is disposed outside the elastic sleeve, and the heating mechanism is used for heating the elastic sleeve to soften the elastic sleeve.
The invention has the beneficial effects that:
the invention provides a maintenance device for a power distribution cabinet. When carrying out electrified maintenance under switch board start state, arrange the elastic sleeve in before treating the maintenance components and parts, thereby accessible drive assembly drives two and struts the piece and keep away from each other and strut and extend the elastic sleeve, makes the wall thickness attenuation of elastic sleeve. Since the elastic sleeve is an insulating transparent sleeve, an insulating transparent film can be formed. At this time, a maintenance person can touch the component through the insulating transparent film and perform maintenance, thereby ensuring insulation between the maintenance person and the component. Meanwhile, because the insulating transparent film is extremely thin, the adverse effect on the perception of components and parts of maintenance personnel can be avoided as much as possible through the arrangement, and the operation is convenient. After the maintenance is accomplished, still can drive two through drive assembly and strut the piece and be close to each other in order to restore this elastic sleeve, accomodate very conveniently.
Drawings
Fig. 1 is a schematic overall structural diagram of a maintenance device for a power distribution cabinet according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a spreader in a maintenance device for a power distribution cabinet according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of an insulating plate in the maintenance device for the power distribution cabinet according to the first embodiment of the present invention.
In the figure:
1. an elastic sleeve; 2. a spreader; 3. a drive assembly; 31. a bidirectional hydraulic cylinder; 32. a hydraulic lever; 4. a movable frame; 41. a handle; 42. a rotating shaft; 43. a rocking handle; 44. an insulating plate; 441. avoiding holes; 5. a heating mechanism; 6. clamping a plate; 7. a connecting plate.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Example one
The embodiment provides a maintenance device for switch board. As shown in fig. 1, the maintenance device for the power distribution cabinet comprises an elastic sleeve 1 and an opening mechanism, wherein the opening mechanism comprises two opening pieces 2 and a driving assembly 3 in transmission connection with at least one of the two opening pieces 2. The elastic sleeve 1 is an insulating transparent sleeve, and the two spreading pieces 2 are arranged in the insulating transparent sleeve. The driving assembly 3 can drive the two strutting pieces 2 to be away from each other so as to strut and extend the elastic sleeve 1, the wall thickness of the elastic sleeve 1 becomes thin to form an insulating transparent film for covering the surface of the component to be maintained, and the driving assembly 3 can drive the two strutting pieces 2 to be close to each other so as to restore the elastic sleeve 1.
According to the arrangement, when the power distribution cabinet is in a starting state for live maintenance, the elastic sleeve 1 is arranged in front of the component to be maintained and the elastic sleeve 1 is propped open by the propping mechanism, so that a maintenance worker can touch the component and maintain the component through the insulating transparent film, and the safety of the maintenance worker is ensured. Meanwhile, the insulating transparent film is extremely thin, so that the perception of maintenance personnel on the components is basically not influenced, and the operation is convenient. After the maintenance is finished, the elastic sleeve 1 can be restored through the opening mechanism, and the storage is very convenient. In addition, it can be understood that the area of the insulating transparent film can be changed by changing the opening degree of the elastic sleeve 1, so that the device can adapt to the maintenance work of components with different sizes.
Of course, according to actual needs, a plurality of stretching mechanisms can be arranged in the elastic sleeve 1 to stretch the elastic sleeve 1 in multiple positions or multiple directions, so that the elastic sleeve is more convenient to use.
In this embodiment, the driving assembly 3 is disposed within the elastic sleeve 1 to facilitate installation and ensure good insulation. It will of course be appreciated that in practice, a miniature drive assembly 3 should be used to minimise the effect of the size of the drive assembly 3 on the expansion of the sleeve 1.
Alternatively, as shown in fig. 1, the driving assembly 3 includes a bidirectional hydraulic cylinder 31, and two output ends of the bidirectional hydraulic cylinder 31 are respectively connected with the two spreading members 2 in a one-to-one correspondence manner to drive the two spreading members 2 to move away from or close to each other. In this embodiment, as shown in fig. 1, the upper and lower ends of the bidirectional hydraulic cylinder 31 are output ends thereof, and the upper and lower ends of the bidirectional hydraulic cylinder 31 are respectively provided with a hydraulic rod 32 to connect the two supporting members 2.
Alternatively, the drive assembly 3 may be provided as a remote-controlled drive assembly. With this arrangement, the use of the drive assembly 3 is particularly convenient when the drive assembly 3 is disposed within the elastomeric sleeve 1. In this embodiment, the bidirectional hydraulic cylinder 31 is an electric hydraulic cylinder for electrical connection. In addition to the bidirectional hydraulic cylinder 31, the driving assembly 3 further includes a driving power supply, a wireless receiving module and a remote controller. Wherein, the driving power supply, the wireless receiving module and the bidirectional hydraulic cylinder 31 are connected in sequence. The remote controller is provided with a wireless transmitting module, the wireless receiving module is in communication connection with the wireless transmitting module so as to be communicated or disconnected with the electric connection between the driving power supply and the bidirectional hydraulic cylinder 31, and the bidirectional hydraulic cylinder 31 is in transmission connection with the spreading piece 2. With this arrangement, the operation of the bi-directional hydraulic cylinder 31, and hence the operation of the spreader 2, can be controlled by the remote controller. Optionally, the wireless transmitting module and the wireless receiving module may be a bluetooth transmitting module and a bluetooth receiving module, respectively, and since such a structure is the prior art, it is not described herein again.
Optionally, the elastic sleeve 1 is an elastic sleeve, and under the driving of the driving assembly 3, the two struts 2 can move away from each other in the radial direction of the elastic sleeve to expand and extend the elastic sleeve, and the two struts 2 can move close to each other in the radial direction of the elastic sleeve to restore the elastic sleeve. The arrangement is simple in structure, easy to manufacture and low in cost. Furthermore, the openings at the two ends of the elastic pipe sleeve are arranged, and the opening part 2 can be placed into the elastic pipe sleeve, so that the installation is convenient.
Corresponding to the arrangement of the elastic pipe sleeve, as shown in fig. 2, the opening part 2 can be also arranged to be an arc-shaped opening plate, so that the outer arc line of the arc-shaped opening plate is attached to the inner wall of the elastic pipe sleeve, thereby ensuring the shape of the opening part 2 to be matched with the shape of the elastic pipe sleeve.
Optionally, the two struts 2 can also move along the axial direction of the elastic pipe sleeve simultaneously to change the strut positions, so that the applicability is stronger. In this embodiment, as shown in fig. 1, the driving assembly 3 is fixedly connected to both of the distractors 2. Two clamping plates 6 are sleeved on the elastic pipe sleeves at two sides of the driving component 3, and the two clamping plates 6 are both connected with the elastic pipe sleeves in a sliding manner. Can promote drive assembly 3 to move along the axis of elasticity pipe box through promoting cardboard 6 to make two strutting pieces 2 remove, finally change and strut the position. Further, for the convenience of use, a connecting plate 7 is further arranged for connecting the two clamping plates 6, so that the relative fixation between the two clamping plates 6 is ensured.
Optionally, as shown in fig. 1, a moving frame 4 is further provided in the maintenance device for a power distribution cabinet, and the elastic sleeve 1 is provided on the moving frame 4. In this embodiment, the movable frame 4 is a portable movable frame, a handle 41 is disposed on the movable frame, and a maintenance worker can freely move the movable frame 4 through the handle 41 to adjust the maintenance position, so that the use is very convenient. Of course, the elastic sleeve 1 can be rotated by rotating the movable frame 4 in actual use, so that the maintenance is more convenient.
Further, as shown in fig. 1, the expansion portion of the elastic sleeve 1 is provided between the first end of the elastic sleeve 1 and the second end of the elastic sleeve 1. Two rotating shafts 42 are arranged on the moving frame 4, the two rotating shafts 42 are arranged at intervals to accommodate the opening position of the elastic sleeve 1, the first end of the elastic sleeve 1 is wound on one rotating shaft 42, and the second end of the elastic sleeve 1 is wound on the other rotating shaft 42. At this time, the tightness of the two sides of the opening part on the elastic sleeve 1 can be adjusted through the rotating shaft 42, and wrinkles are avoided. In this embodiment, the shaft 42 itself is rotatable, which is more convenient to use. Meanwhile, as shown in fig. 1, a rocking handle 43 connected to the rotating shaft 42 is provided in the moving frame 4, and the rotating shaft 42 is rotated by the rocking handle 43.
Optionally, as shown in fig. 1 and 3, the moving frame 4 further includes an insulating plate 44. The insulating plate 44 is formed with a relief hole 441 at a mounting position of the elastic sheath 1. It is easy to understand that, the avoiding hole 441 is disposed in front of the component to be repaired, so that the normal use of the elastic sleeve 1 can be ensured through the avoiding hole 441. Meanwhile, since the insulating plate 44 has a non-perforated region of a certain area, the insulating area of the device is enlarged, and the safety of the entire device is further improved. Of course, the shape and size of the avoiding hole 441 may be determined according to actual needs.
Optionally, as shown in fig. 1, a heating mechanism 5 is further disposed outside the elastic sleeve 1, and the heating mechanism 5 is configured to heat the elastic sleeve 1 to soften the elastic sleeve 1, so as to facilitate the expansion of the elastic sleeve 1. In this embodiment, the heating mechanisms 5 are provided in plurality, and the plurality of heating mechanisms 5 are symmetrically disposed on two sides of the opening portion of the elastic sleeve 1, so that the heating is more uniform. Specifically, the heating mechanism 5 includes a heater rod in which a resistance wire is provided for heating.
In addition, it can be understood that the rotating shaft 42 and the heating mechanism 5 and other structures can be installed on one side of the insulating plate 44 facing the maintenance personnel, so that interference of the rotating shaft 42 and other structures on components in the power distribution cabinet can be avoided, insulation between the rotating shaft 42 and other structures and the components can be realized through the insulating plate 44, and the safety is higher.
To sum up, this embodiment provides a maintenance device for switch board, is provided with elastic sleeve 1 and struts the mechanism in the device. When carrying out electrified maintenance under switch board start state, before arranging the components and parts that need the maintenance in elastic sleeve 1, drive two through drive assembly 3 and strut 2 and keep away from each other and can strut and extend elastic sleeve 1, form insulating transparent film to make maintainer can separate insulating transparent film touch components and parts and maintain, guarantee the insulation between maintainer and the components and parts. Meanwhile, the insulating transparent film is extremely thin, so that the perception of maintenance personnel on the components is basically not influenced, and the operation is convenient. Certainly, after the maintenance is accomplished, still can restore this elastic sleeve 1 through two strutting piece 2 of drive assembly 3 drive each other, accomodate very conveniently.
Example two
This embodiment provides a maintenance device for switch board, its structure with embodiment one is roughly the same, and the difference only lies in: an illuminating mechanism is arranged outside the elastic sleeve 1, and the illuminating direction of the illuminating mechanism is arranged towards the spreading position of the elastic sleeve 1.
Because the light in the switch board is generally comparatively dim, so set up according to this and can greatly make things convenient for maintenance personal to observe the operation to components and parts. Further, still can set up a plurality of lighting mechanism and carry out the illumination of multi-angle in order to elastic sleeve 1, appear the shadow when avoiding shining, be convenient for more observe. Specifically, the lighting mechanism may be a rechargeable light for ease of use. Since the structure of the rechargeable lighting lamp is the prior art, it is not described herein again.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (7)
1. The utility model provides a maintenance device for switch board which characterized in that includes:
the elastic sleeve (1), the elastic sleeve (1) is an insulating transparent sleeve;
the opening mechanism comprises two opening pieces (2) and a driving assembly (3) in transmission connection with at least one of the two opening pieces (2), the two opening pieces (2) are arranged in the elastic sleeve (1), the driving assembly (3) is configured to drive the two opening pieces (2) to move away from each other to open and extend the elastic sleeve (1), the wall thickness of the elastic sleeve (1) is thinned to form an insulating transparent film for covering the surface of a component to be maintained, and the driving assembly (3) is configured to drive the two opening pieces (2) to move close to each other to restore the elastic sleeve (1);
the driving assembly (3) comprises a bidirectional hydraulic cylinder (31), and two output ends of the bidirectional hydraulic cylinder (31) are respectively connected with the two spreading pieces (2) in a one-to-one correspondence manner so as to drive the two spreading pieces (2) to be away from or close to each other;
the maintenance device for the power distribution cabinet further comprises a moving frame (4), and the elastic sleeve (1) is fixed on the moving frame (4);
the opening part of the elastic sleeve (1) is arranged between the first end of the elastic sleeve (1) and the second end of the elastic sleeve (1);
the movable frame (4) is provided with two rotating shafts (42), the two rotating shafts (42) are arranged at intervals to contain the opening positions of the elastic sleeve (1), the first end of the elastic sleeve (1) is wound on one rotating shaft (42), and the second end of the elastic sleeve (1) is wound on the other rotating shaft (42).
2. The maintenance device for distribution cabinets according to claim 1, characterized in that said drive assembly (3) is a remote-controlled drive assembly.
3. The maintenance device for the power distribution cabinet according to claim 1, wherein the elastic sleeve (1) is an elastic sleeve, the two struts (2) are configured to be capable of moving away from each other in a radial direction of the elastic sleeve to expand and extend the elastic sleeve, and the two struts (2) are configured to be capable of moving close to each other in the radial direction of the elastic sleeve to restore the elastic sleeve.
4. The maintenance device for distribution cabinets according to claim 3, characterized in that two said spreader pieces (2) are configured to be simultaneously movable in the axial direction of said elastic tube sleeve to change the spreader position.
5. The maintenance device for the distribution cabinet according to claim 1, wherein the movable frame (4) comprises an insulating plate (44), and an avoiding hole (441) is formed in the insulating plate (44) at a mounting position of the elastic sleeve (1).
6. The maintenance device for the power distribution cabinet according to claim 1, wherein an illumination mechanism is disposed outside the elastic sleeve (1), and an irradiation direction of the illumination mechanism is disposed toward a spreading portion of the elastic sleeve (1).
7. The maintenance device for the power distribution cabinet according to any one of claims 1 to 6, characterized in that a heating mechanism (5) is arranged outside the elastic sleeve (1), and the heating mechanism (5) is used for heating the elastic sleeve (1) to soften the elastic sleeve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010664009.8A CN111817189B (en) | 2020-07-10 | 2020-07-10 | Maintenance device for power distribution cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010664009.8A CN111817189B (en) | 2020-07-10 | 2020-07-10 | Maintenance device for power distribution cabinet |
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| Publication Number | Publication Date |
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| CN111817189A CN111817189A (en) | 2020-10-23 |
| CN111817189B true CN111817189B (en) | 2022-04-12 |
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| CN202010664009.8A Active CN111817189B (en) | 2020-07-10 | 2020-07-10 | Maintenance device for power distribution cabinet |
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| CN (1) | CN111817189B (en) |
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| CN106654944A (en) * | 2016-11-24 | 2017-05-10 | 国网河南省电力公司平顶山供电公司 | Insulated isolation cloth |
| CN206237037U (en) * | 2016-12-16 | 2017-06-09 | 福建省远乐电气科技有限公司 | A kind of metal loop-network switch cabinet |
| CN206442013U (en) * | 2017-02-22 | 2017-08-25 | 珠海德鑫电气设备有限公司 | A kind of low pressure fixed type power distribution cabinet of high security |
| CN109787143A (en) * | 2019-01-21 | 2019-05-21 | 广州供电局有限公司 | Insulation masking utensil |
| CN110626571A (en) * | 2019-10-23 | 2019-12-31 | 西安志高罗茨风机技术有限责任公司 | Elastic film opening device for opening horizontally conveyed film and working method |
| CN210957391U (en) * | 2019-09-29 | 2020-07-07 | 卞龙波 | Anticreep safety block terminal |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207426482U (en) * | 2017-11-23 | 2018-05-29 | 维益宏基集团有限公司 | A kind of power transformation box of easy access |
| CN108123671A (en) * | 2017-11-29 | 2018-06-05 | 北京创昱科技有限公司 | A kind of frame compression set and film drawing process |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29905631U1 (en) * | 1999-03-31 | 1999-06-10 | ABN Werner Braun GmbH, 74196 Neuenstadt | Meter and distribution cabinet |
| CN205543762U (en) * | 2016-03-11 | 2016-08-31 | 云南海力特电气自动化有限公司 | Intelligence electrical power generating system |
| CN106654944A (en) * | 2016-11-24 | 2017-05-10 | 国网河南省电力公司平顶山供电公司 | Insulated isolation cloth |
| CN206237037U (en) * | 2016-12-16 | 2017-06-09 | 福建省远乐电气科技有限公司 | A kind of metal loop-network switch cabinet |
| CN206442013U (en) * | 2017-02-22 | 2017-08-25 | 珠海德鑫电气设备有限公司 | A kind of low pressure fixed type power distribution cabinet of high security |
| CN109787143A (en) * | 2019-01-21 | 2019-05-21 | 广州供电局有限公司 | Insulation masking utensil |
| CN210957391U (en) * | 2019-09-29 | 2020-07-07 | 卞龙波 | Anticreep safety block terminal |
| CN110626571A (en) * | 2019-10-23 | 2019-12-31 | 西安志高罗茨风机技术有限责任公司 | Elastic film opening device for opening horizontally conveyed film and working method |
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