CN112003296A - Cascade H bridge mixed type active power filter convenient to disassemble and assemble - Google Patents
Cascade H bridge mixed type active power filter convenient to disassemble and assemble Download PDFInfo
- Publication number
- CN112003296A CN112003296A CN202010993373.9A CN202010993373A CN112003296A CN 112003296 A CN112003296 A CN 112003296A CN 202010993373 A CN202010993373 A CN 202010993373A CN 112003296 A CN112003296 A CN 112003296A
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- Prior art keywords
- fixedly connected
- active power
- connecting seat
- power filter
- cascaded
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
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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
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/32—Mounting of devices therein
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/20—Active power filtering [APF]
Abstract
The invention belongs to the technical field of electrical equipment, in particular to a cascaded H-bridge hybrid active power filter convenient to disassemble and assemble, which comprises a filter body, wherein the bottom of the filter body is fixedly connected with a connecting seat, and the inner side of the connecting seat is slidably connected with two symmetrically-distributed jacking blocks; when installing, peg graft in the guide rail inboard with the connecting seat, after the mounting hole of guide rail is passed to the positioning seat, pull rod pull down once more makes the extension spring extend, pull rod is deviate from the second joint groove this moment, later pull out the joint slider in the spout, and remove the pulling to pull rod, the extension spring shrink drives pull rod and realizes the location to the joint slider in getting into first joint groove again this moment, the positioning seat can not deviate from in the guide rail mounting hole because of receiving the spacing of joint slider this moment, accomplish the installation to the connecting seat, dismouting easy operation, thereby effectively improve dismouting efficiency, it uses to make things convenient for in operating personnel, and the practicality is improved.
Description
Technical Field
The invention belongs to the technical field of electrical equipment, and particularly relates to a cascaded H-bridge hybrid active power filter convenient to disassemble and assemble.
Background
The traditional direct-current voltage control method adjusts active components in the output current of the converter, but the large fundamental wave impedance of an LC filter in an HAPF greatly limits the dynamic response speed of the method, and a hybrid active power filter formed by connecting a cascaded H-bridge converter and an LC single-tuned passive filter in series provides a low-cost solution for harmonic suppression in high-voltage and high-capacity occasions.
When an existing hybrid active power filter is installed in an electrical cabinet, the hybrid active power filter is usually installed on a DIN guide rail of the cabinet body in a bolt connection fixing mode, although the installation mode is good in stability, due to the fact that the installation space in the cabinet body is small, operation during bolt connection fixing is difficult, disassembly and assembly are not convenient, and convenience is affected.
Disclosure of Invention
To solve the problems set forth in the background art described above. The invention provides a cascaded H-bridge hybrid active power filter convenient to disassemble and assemble, which has the characteristic of convenient disassembly and assembly.
In order to achieve the purpose, the invention provides the following technical scheme: a cascaded H-bridge hybrid active power filter convenient to disassemble and assemble comprises a filter body, wherein the bottom of the filter body is fixedly connected with a connecting seat, the inner side of the connecting seat is slidably connected with two symmetrically-distributed jacking blocks, one end of each jacking block, which is far away from the connecting seat, is fixedly connected with a push plate, the outer wall of each push plate is fixedly connected with a friction layer, the upper end face of each jacking block is fixedly connected with a pulling block, one end of each jacking block, which is positioned at the inner side of the connecting seat, is fixedly connected with an anti-falling stop block, the bottom of the connecting seat is fixedly connected with a positioning seat, the inner side of the positioning seat is slidably connected with two symmetrically-distributed clamping slide blocks, each clamping slide block is provided with a first clamping groove and a second clamping groove, the bottom of the positioning seat is slidably connected with two symmetrically-distributed pulling rods, and the, the outer wall of the device body is fixedly connected with a fixed seat, and the inner side of the fixed seat is slidably connected with a movable clamping rod.
As a preferred technical scheme of the invention, the connecting seat is provided with two mounting grooves, and the two jacking blocks are respectively connected with the two mounting grooves in a sliding manner.
As a preferable technical solution of the present invention, a first compression spring is fixedly connected in the mounting groove, and the first compression spring is fixedly connected with the anti-drop stopper.
As a preferable technical scheme of the invention, the friction layer is made of rubber.
As a preferred technical scheme of the invention, the positioning seat is provided with two sliding grooves, and the two clamping sliding blocks are respectively connected in the two sliding grooves in a sliding manner.
As a preferred technical scheme of the present invention, the positioning seat is provided with two through grooves matched with the pulling rod, and the pulling rod penetrates through the through grooves and is slidably connected with the through grooves.
As a preferable aspect of the present invention, an auxiliary plate is fixedly connected to a lower end surface of the pulling rod.
As a preferred technical solution of the present invention, two tension springs are fixedly connected between the auxiliary plate and the outer wall of the positioning seat.
As a preferred technical solution of the present invention, a second compression spring is fixedly connected to an inner side of the fixing seat, and the movable clamping rod is fixedly connected to the second compression spring.
As a preferable technical solution of the present invention, the width of the anti-drop stopper is greater than the inner diameter of the opening end of the mounting groove.
Compared with the prior art, the invention has the beneficial effects that:
1. when the auxiliary plate is installed, the auxiliary plate is pulled, the tension spring is stretched to drive the pulling rod to be pulled out of the first clamping groove, the clamping slide blocks are pushed towards the inner side of the sliding groove until the positions of the second clamping groove and the pulling rod are aligned, the auxiliary plate is released from being pulled, the pulling rod is driven to enter the first clamping groove when the tension spring is contracted, the distance between the two clamping slide blocks is reduced due to sliding, the connecting seat is inserted into the inner side of the guide rail until the positioning seat passes through the installation hole of the guide rail, the pulling rod is pulled down again to stretch the tension spring, the pulling rod is pulled out of the second clamping groove at the moment, the clamping slide blocks are pulled out of the sliding groove and the pulling of the pulling rod is released, the tension spring is contracted to drive the pulling rod to enter the first clamping groove again to position the clamping slide blocks, and the positioning seat cannot be pulled out of the guide rail installation hole due to the limitation of the clamping slide blocks, the installation of completion to the connecting seat, dismouting easy operation to effectively improve dismouting efficiency, made things convenient for in operating personnel to use, improved the practicality.
2. When the connecting seat is inserted into the inner side of the guide rail, the pulling block presses the jacking block towards the inner side of the mounting groove, so that the first compression spring is compressed and contracted, the distance between the two push plates is reduced at the moment, the push plates are relieved from being pressed after the positioning seat passes through the mounting hole of the guide rail, the first compression spring rebounds to drive the push plates to push the friction layer towards the inner wall of the jacking block, the friction layer is in contact with the inner wall of the jacking block, the push plates are pushed by the reaction force of the first compression spring to realize further clamping and limiting on the connecting seat, the friction layer plays a role in increasing friction force, the connecting seat is further prevented from being separated from the inner side of the jacking block, the stability of the device body after being mounted is improved, the stability cannot be influenced when the device is convenient to mount, and the practicability is further improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the device body, the fixing base and the movable clamping rod of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 1;
FIG. 4 is an enlarged view of portion B of FIG. 2;
fig. 5 is a sectional view of the positioning socket of the present invention.
In the figure: 1. a body; 2. a connecting seat; 21. mounting grooves; 22. a first compression spring; 3. a jacking block; 31. pushing the plate; 311. a friction layer; 32. pulling the block; 33. an anti-drop stop block; 4. positioning seats; 401. a chute; 402. a through groove; 41. clamping the sliding block; 411. a first clamping groove; 412. a second clamping groove; 42. pulling a rod; 421. an auxiliary plate; 422. a tension spring; 5. a fixed seat; 51. a movable clamping rod; 52. a second compression spring.
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.
Examples
Referring to fig. 1-5, the present invention provides a technical solution: a cascaded H-bridge hybrid active power filter convenient to disassemble and assemble comprises a device body 1, wherein the bottom of the device body 1 is fixedly connected with a connecting seat 2, the inner side of the connecting seat 2 is slidably connected with two symmetrically-distributed jacking blocks 3, one end of each jacking block 3, which is far away from the connecting seat 2, is fixedly connected with a push plate 31, the outer wall of each push plate 31 is fixedly connected with a friction layer 311, the upper end surface of each jacking block 3 is fixedly connected with a pulling block 32, one end, which is positioned at the inner side of the connecting seat 2, of each jacking block 3 is fixedly connected with an anti-falling stop block 33, the bottom of the connecting seat 2 is fixedly connected with a positioning seat 4, the inner side of each positioning seat 4 is slidably connected with two symmetrically-distributed clamping slide blocks 41, each clamping slide block 41 is provided with a first clamping groove 411 and a second clamping groove 412, the bottom of each positioning seat 4 is slidably, one side of the outer wall of the device body 1 is fixedly connected with a fixed seat 5, and the inner side of the fixed seat 5 is slidably connected with a movable clamping rod 51.
In this embodiment: when the installation is carried out, firstly, the auxiliary plate 421 is pulled, at this time, the extension spring 422 extends to drive the pulling rod 42 to be pulled out from the first clamping groove 411, then the clamping slide blocks 41 are pushed towards the inner side direction of the sliding groove 401, the pulling to the auxiliary plate 421 is released until the positions of the second clamping groove 412 and the pulling rod 42 are aligned with each other, the pulling rod 42 is driven to enter the first clamping groove 411 when the extension spring 422 contracts, at this time, the distance between the two clamping slide blocks 41 is reduced due to sliding, then the connecting seat 2 is inserted into the inner side of the guide rail, when the connecting seat 2 is inserted into the inner side of the guide rail, the pushing block 3 is pressed towards the inner side of the mounting groove 21 by the pulling block 32, so that the first compression spring 22 is compressed and contracted, at this time, the distance between the two pushing plates 31 is reduced until the positioning seat 4 passes through the mounting hole of the guide rail, the pressing to the pushing plate 31 is released, the pushing plate 31 is driven to push the friction, the friction layer 311 is contacted with the inner wall of the puller block 3, the push plate 31 is pushed by the counterforce of the first compression spring 22 to realize further clamping and limiting on the connecting seat 2, the friction layer 311 plays a role in increasing friction force, the connecting seat 2 is prevented from being pulled out from the inner side of the puller block 3, the stability of the device body 1 after installation is improved, after the connecting seat 2 is inserted into the inner side of the guide rail until the positioning seat 4 passes through the installation hole of the guide rail, the pulling rod 42 is pulled downwards again to extend the tension spring 422, the pulling rod 42 is pulled out from the second clamping groove 412, the clamping slide block 41 is pulled out from the sliding groove 401, the pulling of the pulling rod 42 is released, the tension spring 422 contracts to drive the pulling rod 42 to enter the first clamping groove 411 again to realize positioning on the clamping slide block 41, and the positioning seat 4 cannot be pulled out from the installation hole of the guide rail due to the limiting of the clamping slide block 41, the installation of completion to connecting seat 2, dismouting easy operation to effectively improve dismouting efficiency, made things convenient for in operating personnel to use, improved the practicality.
In fig. 1: the connecting seat 2 is provided with two mounting grooves 21, the two jacking blocks 3 are respectively connected with the two mounting grooves 21 in a sliding manner, a first compression spring 22 is fixedly connected in the mounting groove 21, the first compression spring 22 is fixedly connected with an anti-falling stop block 33, the width of the anti-falling stop block 33 is larger than the inner diameter of the opening end of the mounting groove 21, and the friction layer 311 is made of rubber; reaction force through first compression spring 22 promotes push pedal 31 to guide rail inner wall, make the inner wall contact of frictional layer 311 and guide rail, the effect of increased friction has been played, improve the effect of push pedal 31 sliding resistance, further prevent that push pedal 31 from sliding from deviating from the inboard of connecting seat 2, and when first compression spring 22 drove the push pedal 31 of 3 one ends of top tight piece and slide, anticreep dog 33 plays the effect that prevents top tight piece 3 and deviate from the inboard of mounting groove 21, the sliding stability of top tight piece 3 has been improved.
In fig. 1, 3 and 5: the positioning seat 4 is provided with two sliding grooves 401, the two clamping sliding blocks 41 are respectively connected in the two sliding grooves 401 in a sliding manner, the positioning seat 4 is provided with two through grooves 402 matched with the pulling rod 42, the pulling rod 42 penetrates through the through grooves 402 and is connected with the through grooves 402 in a sliding manner, the lower end face of the pulling rod 42 is fixedly connected with an auxiliary plate 421, and two tension springs 422 are fixedly connected between the auxiliary plate 421 and the outer wall of the positioning seat 4; inserting the connecting seat 2 in the guide rail inboard until the positioning seat 4 passes the mounting hole of guide rail, pull rod 42 is pulled down again and make extension spring 422 extend, pull rod 42 is deviate from second joint groove 412 this moment, later pull out joint slider 41 from spout 401, and remove the pulling to pull rod 42, extension spring 422 shrink drives pull rod 42 and gets into first joint groove 411 again and realize the location to joint slider 41 this moment, positioning seat 4 can not deviate from in the guide rail mounting hole because of receiving joint slider 41 spacing this moment, accomplish the installation to connecting seat 2.
In fig. 2 and 4: the inner side of the fixed seat 5 is fixedly connected with a second compression spring 52, and the movable clamping rod 51 is fixedly connected with the second compression spring 52; when the external connector is connected with the device body 1, the second compression spring 52 is compressed and contracted by pulling the movable clamping rod 51 towards the outer side direction of the device body 1 until the external connector is plugged with the device body 1, the pulling of the movable clamping rod 51 is released, so that the second compression spring 52 rebounds to drive the two movable clamping rods 51 to clamp the external connector, and the overall stability is further improved.
The working principle and the using process of the invention are as follows: when the installation is carried out, firstly, the auxiliary plate 421 is pulled, at this time, the tension spring 422 extends to drive the pulling rod 42 to be pulled out from the first clamping groove 411, then the clamping slide blocks 41 are pushed towards the inner side direction of the sliding groove 401, the pulling to the auxiliary plate 421 is released until the positions of the second clamping groove 412 and the pulling rod 42 are aligned with each other, the pulling rod 42 is driven to enter the first clamping groove 411 when the tension spring 422 contracts, at this time, the distance between the two clamping slide blocks 41 is reduced due to sliding, then the connecting seat 2 is inserted into the inner side of the guide rail, when the connecting seat 2 is inserted into the inner side of the guide rail, the pushing block 3 is pressed towards the inner side of the mounting groove 21 by the pulling block 32, so that the first compression spring 22 is compressed and contracted, at this time, the distance between the two pushing plates 31 is reduced until the positioning seat 4 passes through the mounting hole of the guide rail, the pressing to the pushing plate 31 is released, the pushing plate 31 is driven to push the, the friction layer 311 is contacted with the inner wall of the puller block 3, the push plate 31 is pushed by the counterforce of the first compression spring 22 to realize further clamping and limiting on the connecting seat 2, the friction layer 311 plays a role in increasing friction force, the connecting seat 2 is prevented from being pulled out from the inner side of the puller block 3, the stability of the device body 1 after installation is improved, after the connecting seat 2 is inserted into the inner side of the guide rail until the positioning seat 4 passes through the installation hole of the guide rail, the pulling rod 42 is pulled downwards again to extend the tension spring 422, the pulling rod 42 is pulled out from the second clamping groove 412, the clamping slide block 41 is pulled out from the sliding groove 401, the pulling of the pulling rod 42 is released, the tension spring 422 contracts to drive the pulling rod 42 to enter the first clamping groove 411 again to realize positioning on the clamping slide block 41, and the positioning seat 4 cannot be pulled out from the installation hole of the guide rail due to the limiting of the clamping slide block 41, accomplish the installation to connecting seat 2, stimulate pole 42 once more through pulling the pole during demolising for the pole 42 is deviate from first joint groove 411 to the pulling, and joint slider 41 no longer receives spacingly this moment, and operating personnel pushes in joint slider 41 to spout 401, makes connecting seat 2 deviate from the guide rail inboard with the ware body 1 pull-up, can accomplish the dismantlement, and this scheme dismouting easy operation to effectively improve dismouting efficiency, make things convenient for in operating personnel to use, has improved the practicality.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Cascade H bridge mixed type active power filter convenient to dismouting, including the ware body (1), its characterized in that: the device is characterized in that a connecting seat (2) is fixedly connected to the bottom of the device body (1), two symmetrically-distributed jacking blocks (3) are connected to the inner side of the connecting seat (2) in a sliding manner, a push plate (31) is fixedly connected to one end, far away from the connecting seat (2), of each jacking block (3), a friction layer (311) is fixedly connected to the outer wall of each push plate (31), a pulling block (32) is fixedly connected to the upper end face of each jacking block (3), an anti-falling block (33) is fixedly connected to one end, located on the inner side of the connecting seat (2), of each jacking block (3), a positioning seat (4) is fixedly connected to the bottom of each connecting seat (2), two symmetrically-distributed clamping slide blocks (41) are connected to the inner side of each positioning seat (4) in a sliding manner, a first clamping groove (411) and a second clamping groove (412) are formed in each clamping slide block (41), and two symmetrically-distributed pulling rods (, two pulling rod (42) are located two respectively in first joint groove (411), outer wall one side fixedly connected with fixing base (5) of the ware body (1), the inboard sliding connection of fixing base (5) has movable kelly (51).
2. The easy-to-dismount cascaded H-bridge hybrid active power filter according to claim 1, wherein: two mounting grooves (21) are formed in the connecting seat (2), and the two jacking blocks (3) are respectively connected with the two mounting grooves (21) in a sliding mode.
3. The cascaded H-bridge hybrid active power filter convenient to disassemble and assemble as claimed in claim 2, wherein: the interior fixedly connected with of mounting groove (21) first compression spring (22), first compression spring (22) with anticreep dog (33) fixed connection.
4. The easy-to-dismount cascaded H-bridge hybrid active power filter according to claim 1, wherein: the friction layer (311) is made of rubber.
5. The easy-to-dismount cascaded H-bridge hybrid active power filter according to claim 1, wherein: two sliding grooves (401) are formed in the positioning seat (4), and the clamping sliding blocks (41) are connected in the two sliding grooves (401) in a sliding mode respectively.
6. The easy-to-dismount cascaded H-bridge hybrid active power filter according to claim 1, wherein: two through grooves (402) matched with the pulling rod (42) are formed in the positioning seat (4), and the pulling rod (42) penetrates through the through grooves (402) and is in sliding connection with the through grooves (402).
7. The easy-to-dismount cascaded H-bridge hybrid active power filter according to claim 1, wherein: the lower end surface of the pulling rod (42) is fixedly connected with an auxiliary plate (421).
8. The easy-to-dismount cascaded H-bridge hybrid active power filter according to claim 7, wherein: two tension springs (422) are fixedly connected between the auxiliary plate (421) and the outer wall of the positioning seat (4).
9. The easy-to-dismount cascaded H-bridge hybrid active power filter according to claim 1, wherein: the inner side of the fixed seat (5) is fixedly connected with a second compression spring (52), and the movable clamping rod (51) is fixedly connected with the second compression spring (52).
10. The cascaded H-bridge hybrid active power filter convenient to disassemble and assemble as claimed in claim 2, wherein: the width of the anti-falling stop block (33) is larger than the inner diameter of the opening end of the mounting groove (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010993373.9A CN112003296B (en) | 2020-09-21 | 2020-09-21 | Cascade H bridge mixed type active power filter convenient to disassemble and assemble |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010993373.9A CN112003296B (en) | 2020-09-21 | 2020-09-21 | Cascade H bridge mixed type active power filter convenient to disassemble and assemble |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112003296A true CN112003296A (en) | 2020-11-27 |
| CN112003296B CN112003296B (en) | 2022-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010993373.9A Active CN112003296B (en) | 2020-09-21 | 2020-09-21 | Cascade H bridge mixed type active power filter convenient to disassemble and assemble |
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| Country | Link |
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| CN (1) | CN112003296B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113753517A (en) * | 2021-10-12 | 2021-12-07 | 中国电建集团贵阳勘测设计研究院有限公司 | Power equipment mobile device that electric power engineering used |
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| CN204966639U (en) * | 2015-08-28 | 2016-01-13 | 刘侃 | A mounting of taking a percentage for wave filter |
| CN210476694U (en) * | 2019-08-13 | 2020-05-08 | 苏州联致盈精密机械有限公司 | Frock clamp is used in production of wave filter antenna |
| CN210669128U (en) * | 2019-10-21 | 2020-06-02 | 山西麦科森电气有限公司 | Power distribution cabinet convenient to install |
| CN211063104U (en) * | 2019-12-25 | 2020-07-21 | 广西浦天电气有限公司 | Heat dissipation device for power distribution cabinet |
| CN211265677U (en) * | 2019-09-12 | 2020-08-14 | 深圳市宏晨宇科技有限公司 | Filter with heat dissipation function |
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2020
- 2020-09-21 CN CN202010993373.9A patent/CN112003296B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204966639U (en) * | 2015-08-28 | 2016-01-13 | 刘侃 | A mounting of taking a percentage for wave filter |
| CN210476694U (en) * | 2019-08-13 | 2020-05-08 | 苏州联致盈精密机械有限公司 | Frock clamp is used in production of wave filter antenna |
| CN211265677U (en) * | 2019-09-12 | 2020-08-14 | 深圳市宏晨宇科技有限公司 | Filter with heat dissipation function |
| CN210669128U (en) * | 2019-10-21 | 2020-06-02 | 山西麦科森电气有限公司 | Power distribution cabinet convenient to install |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113753517A (en) * | 2021-10-12 | 2021-12-07 | 中国电建集团贵阳勘测设计研究院有限公司 | Power equipment mobile device that electric power engineering used |
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| Publication number | Publication date |
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| CN112003296B (en) | 2022-01-21 |
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