CN117007924B - Interface device of GIS partial discharge test sensor - Google Patents
Interface device of GIS partial discharge test sensor Download PDFInfo
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- CN117007924B CN117007924B CN202310984823.1A CN202310984823A CN117007924B CN 117007924 B CN117007924 B CN 117007924B CN 202310984823 A CN202310984823 A CN 202310984823A CN 117007924 B CN117007924 B CN 117007924B
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- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims 2
- 239000012212 insulator Substances 0.000 abstract description 20
- 238000000034 method Methods 0.000 abstract description 6
- 238000005266 casting Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention relates to the technical field of interface devices, in particular to an interface device of a GIS partial discharge test sensor, which comprises a fixed plate, wherein a connecting hole is formed in the surface of the fixed plate, a mounting block is fixedly arranged on the surface of the fixed plate, a mounting groove is formed in the surface of the mounting block, a threaded rod is rotationally arranged in the mounting groove, moving blocks are symmetrically sheathed on the threaded rod in a threaded manner, clamping blocks are fixedly arranged on the surfaces of the two moving blocks, two moving holes are formed in the surfaces of the two clamping blocks, moving rods are slidably arranged in the moving holes, a pressing block is fixedly arranged at one end of each two moving rods, and an elastic assembly is arranged on the surfaces of the clamping blocks. According to the invention, through the mutual matching of the threaded rod, the moving block, the clamping block, the elastic component and the pressing block, the sensor can be quickly and conveniently installed on the pouring hole type basin-type insulator, and the problems of complicated disassembly and assembly processes and low working efficiency of the existing pouring hole type basin-type insulator and the sensor are effectively solved.
Description
Technical Field
The invention relates to the technical field of interface devices, in particular to an interface device of a GIS partial discharge test sensor.
Background
At present, the existing GIS equipment partial discharge detection mode is to detect partial discharge radiation electromagnetic wave signals through an ultrahigh frequency technology, a UHF sensor and a GIS basin-type insulator are needed, and the 110kV and above GIS basin-type insulator mainly comprises: when the casting hole type basin-type insulator is used, a metal sheet outside a closed casting hole is required to be removed, an external UHF sensor is placed on the exposed casting hole, and partial discharge signal detection of GIS equipment is realized by detecting electromagnetic wave signals radiated to the position of the casting hole.
In order to ensure the stability of the fixation of the sensor and the pouring hole type insulator, most of the existing sensors are fastened by screws in a fixed mode with the existing pouring hole type basin type insulator, however, when the sensors are disassembled and assembled, the process is complicated, and the working efficiency is low.
Disclosure of Invention
The invention aims to solve the defects in the prior art, most of the existing sensors are fastened with the existing pouring hole type basin-type insulator by screws, however, when the sensors are disassembled, the process is complicated, the working efficiency is low, and the interface device of the GIS partial discharge test sensor is provided.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the interface device of the GIS partial discharge test sensor comprises a fixed plate, wherein a connecting hole is formed in the surface of the fixed plate, a mounting block is fixedly arranged on the surface of the fixed plate, a mounting groove is formed in the surface of the mounting block, threaded rods with opposite screw thread directions at the left end and the right end are rotatably arranged in the mounting groove, and one end of each threaded rod penetrates out of the mounting groove and is fixedly provided with a first adjusting wheel;
the movable block is sleeved on the threaded rod through symmetrical threads, the L-shaped clamping blocks are fixedly arranged on the surfaces of the two movable blocks, two movable holes are formed in the surfaces of the two clamping blocks, the movable rods are slidably arranged in the movable holes, pressing blocks are fixedly arranged at one ends of each two movable rods, and elastic components which are used for driving the pressing blocks to move towards the direction of the fixed plate are arranged on the surfaces of the clamping blocks.
Preferably, the elastic component comprises a fixed block fixedly arranged on the clamping block, a straight rod fixedly arranged on the fixed block, a first telescopic spring sleeved on the straight rod and a connecting block sleeved on the straight rod in a sliding manner, two ends of the first telescopic spring are respectively fixedly connected with the connecting block and the fixed block, and the connecting block is fixedly connected with the pressing block.
Preferably, the surface of the fixing plate is provided with a plurality of positioning holes, and a plurality of positioning pins are inserted into the positioning holes.
Preferably, the fixed plate surface fixed mounting has the rectangle piece, the round hole has been seted up to rectangle piece surface symmetry, two equal slip in the round hole is inserted and is equipped with the montant, and the one end fixed mounting of two montants has the roof, two equal fixed mounting of one end of montant has the dog, all overlaps on two montants and is equipped with the second telescopic spring, two the both ends of second telescopic spring respectively with roof and rectangle piece fixed connection.
Preferably, the side of roof has seted up the mounting hole, symmetrical slidable mounting has the stopper of L shape in the mounting hole, be equipped with the drive assembly that is used for driving two stoppers and removes each other in the mounting hole.
Preferably, the transmission assembly comprises a spur gear rotatably arranged in the mounting hole, two rack bars respectively fixedly arranged on the two limiting blocks, and a rotating shaft fixedly arranged on the spur gear, wherein the two rack bars are engaged with the spur gear, and one end of the rotating shaft penetrates out of the mounting hole and is fixedly provided with a second adjusting wheel.
Preferably, the axis of rotation fixed surface has cup jointed spacing wheel, roof surface symmetry fixed mounting has the supporting shoe, two the slide hole has all been seted up on the supporting shoe surface, two equal slidable mounting has the slide bar in the slide hole, two equal fixed mounting of one end of slide bar has the arc contact block, two the one end fixed mounting of slide bar has the pull block, two all the cover is equipped with the third extension spring on the slide bar, two the both ends of third extension spring respectively with arc contact block and supporting shoe fixed connection.
Preferably, the shielding plate is rotatably installed on the surface of the rectangular block, the strip-shaped rods are symmetrically and fixedly installed on the surface of the fixing plate, a plurality of positioning grooves are formed in the surfaces of the strip-shaped rods, the supporting rods are rotatably installed on the two side surfaces of the shielding plate, and one ends of the two supporting rods are respectively inserted into the two positioning grooves.
Preferably, the surfaces of the clamping blocks, the pressing blocks, the top plate and the limiting blocks are fixedly provided with protection pads, and a plurality of protection pads are made of rubber materials.
Compared with the prior art, the invention has the beneficial effects that:
1, through the mutual coordination of the threaded rod, the moving block, the clamping block, the elastic component and the pressing block, the sensor can be quickly and conveniently installed on the pouring hole type basin-type insulator, and a metal sheet is not required to be disassembled and assembled during the plugging, so that the problems of complicated disassembly process and low working efficiency of the existing pouring hole type basin-type insulator and the sensor are effectively solved;
2, through the mutual matching of the rectangular block, the vertical rod, the second telescopic spring, the top plate, the limiting block and the transmission component, the upper end of the sensor can be limited and fixed, so that the sensor can be stably arranged on the pouring hole type basin-type insulator, and the stability of the interface device is effectively improved;
3, through mutually supporting of shielding plate, bracing piece and bar, the sensor is when carrying out the signal of telecommunication and detecting, can play the effect of protection to the sensor, avoids when using, and some impurity or water droplet drop to sensor and pouring hole formula basin insulator on, the effectual security that improves interface arrangement.
Drawings
Fig. 1 is a schematic perspective view of an interface device of a GIS partial discharge test sensor according to the present invention;
fig. 2 is a schematic diagram of a partial perspective structure of an interface device of a GIS partial discharge test sensor according to the present invention;
fig. 3 is a schematic diagram of a three-dimensional partial cross-section structure of a pressing plate and a limiting block in an interface device of a GIS partial discharge test sensor according to the present invention;
FIG. 4 is an enlarged schematic view of the structure of FIG. 2A;
FIG. 5 is an enlarged schematic view of the structure of FIG. 2B;
FIG. 6 is an enlarged schematic view of FIG. 2 at C;
fig. 7 is an enlarged schematic view of the structure of fig. 3 at D.
In the figure: the device comprises a fixed plate 1, a mounting block 2, a threaded rod 3, a first adjusting wheel 4, a moving block 5, a clamping block 6, a moving rod 7, a pressing block 8, a fixed block 9, a straight rod 10, a first telescopic spring 11, a connecting block 12, a locating pin 13, a rectangular block 14, a vertical rod 15, a top plate 16, a stop block 17, a second telescopic spring 18, a limiting block 19, a straight gear 20, a rack bar 21, a rotating shaft 22, a second adjusting wheel 23, a limiting wheel 24, a supporting block 25, a sliding rod 26, an arc-shaped contact block 27, a pulling block 28, a third telescopic spring 29, a shielding plate 30, a bar 31 and a supporting rod 32.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1-7, an interface device of a GIS partial discharge test sensor comprises a fixing plate 1, wherein a plurality of positioning holes are formed in the surface of the fixing plate 1, positioning pins 13 are inserted into the positioning holes, a connecting hole is formed in the surface of the fixing plate 1, a mounting block 2 is fixedly mounted on the surface of the fixing plate 1, a mounting groove is formed in the surface of the mounting block 2, threaded rods 3 with opposite screw thread directions at the left end and the right end are rotatably mounted in the mounting groove, one end of each threaded rod 3 penetrates out of the mounting groove and is fixedly provided with a first adjusting wheel 4, the fixing plate 1 is fixedly mounted on a pouring hole insulator through the positioning pins 13, and the sensor is directly inserted into the connecting hole during mounting.
The movable block 5 is sleeved on the threaded rod 3 through symmetrical threads, the L-shaped clamping blocks 6 are fixedly arranged on the surfaces of the two movable blocks 5, two movable holes are formed in the surfaces of the two clamping blocks 6, the movable rods 7 are slidably arranged in the plurality of movable holes, the pressing blocks 8 are fixedly arranged at one ends of each two movable rods 7, the elastic components which drive the pressing blocks 8 to move towards the fixed plate 1 are arranged on the surfaces of the clamping blocks 6, the elastic components comprise fixed blocks 9 fixedly arranged on the clamping blocks 6, straight rods 10 fixedly arranged on the fixed blocks 9, first telescopic springs 11 sleeved on the straight rods 10 and connecting blocks 12 sleeved on the straight rods 10 in a sliding mode, two ends of each first telescopic spring 11 are fixedly connected with the corresponding connecting blocks 12 and the corresponding fixed blocks 9, and the connecting blocks 12 are fixedly connected with the pressing blocks 8.
After the sensor is inserted into the connecting hole, the threaded rod 3 is driven to rotate through rotating the first adjusting wheel 4, the two moving blocks 5 in the mounting groove are driven to be close to each other due to the fact that the threads at the left end and the right end of the threaded rod 3 are opposite in direction, then the two clamping blocks 6 are driven to be close to each other through the two moving blocks 5, the two clamping blocks 6 are firstly driven to move in the direction away from the clamping blocks 6 after moving, the moving rod 7 moves in the moving hole, the pressing blocks 8 drive the connecting block 12 to slide on the straight rod 10 in the moving process, the first telescopic spring 11 is driven to stretch through the connecting block 12, the pressing blocks 8 are driven to move in the direction of the sensor under the action of elastic force of the first telescopic spring 11 until the pressing blocks 8 are contacted with the sensor, and accordingly the two clamping blocks 6 and the two pressing blocks 8 can play a role of clamping and fixing the sensor, the sensor can be stably clamped in the connecting hole, the sensor can be quickly and conveniently mounted in the pouring basin type insulator, and the problem of the existing basin type insulator is solved, and the problem of the insulator type insulator is effectively solved.
The fixed plate 1 surface fixed mounting has rectangular block 14, rectangular block 14 surface symmetry has seted up the round hole, all slip cartridge has montant 15 in two round holes, the one end fixed mounting of two montants 15 has roof 16, the one end of two montants 15 is all fixed mounting has dog 17, all the cover is equipped with second telescopic spring 18 on two montants 15, the both ends of two second telescopic springs 18 respectively with roof 16 and rectangular block 14 fixed connection, the mounting hole has been seted up to the side of roof 16, the stopper 19 of L shape is installed to the symmetry slip in the mounting hole, be equipped with the drive assembly who is used for driving two stoppers 19 and removes each other in the mounting hole, drive assembly is including rotating rack bar 21 of installing in the mounting hole, two fixed mounting on rack bar 20 respectively, fixed mounting is at the axis of rotation 22 on rack bar 20, two rack bar 21 all are connected with the straight gear 20 meshing, the one end of axis of rotation 22 wears out the mounting hole and fixed mounting has second regulating wheel 23.
Before the sensor is installed in the jack, the top plate 16 is driven to move upwards, the two vertical rods 15 move in the two sliding holes respectively, the two second telescopic springs 18 are driven to compress, when the sensor is installed on the fixed plate 1, the top plate 16 is loosened, under the action of elastic force of the second telescopic springs 18, the top plate 16 is driven to move towards the sensor until the sensor is contacted, the sensor can be clamped and fixed through the two clamping blocks 6 and the top plate 16, stability of the interface device is further improved, after the top plate 16 is contacted with the sensor, the second adjusting wheel 23 is rotated to drive the rotating shaft 22 to rotate, then the rotating shaft 22 is rotated to drive the spur gear 20 to rotate, and as the two rack rods 21 are meshed and connected with the spur gear 20, the two limiting blocks 19 are driven to be close to each other through the two rack rods 21, the two limiting blocks 19 are contacted with two side faces of the contactor, the contactor is clamped between the two limiting blocks 19, and stability of the interface device is further improved.
The axis of rotation 22 fixed surface has cup jointed spacing wheel 24, roof 16 surface symmetry fixed mounting has supporting shoe 25, and the slide hole has all been seted up on two supporting shoe 25 surfaces, and equal slidable mounting has slide bar 26 in two slide holes, and the equal fixed mounting of one end of two slide bars 26 has arc contact block 27, and the one end fixed mounting of two slide bars 26 has pull block 28, all overlaps on two slide bars 26 and is equipped with third extension spring 29, and the both ends of two third extension springs 29 respectively with arc contact block 27 and supporting shoe 25 fixed connection.
When the rotating shaft 22 is rotated, the sliding rod 26 is pulled by the pull block 28 to drive the arc-shaped contact block 27 to be separated from the limiting wheel 24, the third telescopic spring 29 is compressed, when the two limiting blocks 19 are in contact with the sensor, the pull block 28 is loosened, under the elastic force of the third telescopic spring 29, the sliding rod 26 moves towards the limiting wheel 24 and drives the arc-shaped contact block 27 to be in contact with the limiting wheel 24, friction force is generated between the arc-shaped contact block 27 and the limiting wheel 24, the rotating shaft 22 can be limited to rotate under the action of the friction force, and the two limiting blocks 19 are prevented from loosening.
The shielding plate 30 is rotatably arranged on the surface of the rectangular block 14, the strip-shaped rods 31 are symmetrically and fixedly arranged on the surface of the fixing plate 1, the surfaces of the two strip-shaped rods 31 are provided with a plurality of positioning grooves, the two side surfaces of the shielding plate 30 are rotatably provided with the supporting rods 32, one ends of the two supporting rods 32 are respectively inserted into the two positioning grooves, one ends of the two supporting rods 32 can be respectively inserted into the positioning grooves formed in the two strip-shaped rods 31, so that the shielding plate 30 is supported, the sensor can play a role in protecting the sensor when detecting electric signals, and the safety of the interface device is effectively improved when impurities or water drops fall onto the sensor and the pouring hole type basin-type insulator during use.
The surfaces of the clamping block 6, the pressing block 8, the top plate 16 and the limiting block 19 are fixedly provided with protection pads, the protection pads are made of rubber, and when the sensor is clamped, the protection pads can protect the sensor and prevent the sensor from being damaged when the sensor is clamped.
According to the invention, after the sensor is inserted into the connecting hole, the first adjusting wheel 4 is rotated to drive the threaded rod 3 to rotate, so that the two moving blocks 5 in the mounting groove are driven to be close to each other, the two clamping blocks 6 are driven to be close to each other, the pressing blocks 8 are driven to move away from the clamping blocks 6 by the elastic component before the two clamping blocks 6 move, when the two clamping blocks 6 are contacted with the sensor, the two pressing blocks 8 are loosened, the pressing blocks 8 move towards the sensor until the pressing blocks 8 are contacted with the sensor, the two clamping blocks 6 and the two pressing blocks 8 play a role of clamping and fixing the sensor, so that the sensor can be stably clamped in the connecting hole, the sensor can be quickly and conveniently mounted in the pouring hole type basin-type insulator, and the problems of complicated disassembly and assembly processes and low working efficiency of the existing pouring hole type basin-type insulator and the sensor are effectively solved.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (4)
1. The interface device of the GIS partial discharge test sensor comprises a fixed plate (1), and is characterized in that a connecting hole is formed in the surface of the fixed plate (1), a mounting block (2) is fixedly arranged on the surface of the fixed plate (1), a mounting groove is formed in the surface of the mounting block (2), threaded rods (3) with opposite thread directions at the left end and the right end are rotatably arranged in the mounting groove, and one end of each threaded rod (3) penetrates out of the mounting groove and is fixedly provided with a first adjusting wheel (4);
the movable block (5) is symmetrically sleeved on the threaded rod (3) through threads, L-shaped clamping blocks (6) are fixedly arranged on the surfaces of the two movable blocks (5), two movable holes are formed in the surfaces of the two clamping blocks (6), movable rods (7) are slidably arranged in the plurality of movable holes, pressing blocks (8) are fixedly arranged at one ends of the two movable rods (7) slidably arranged in the two movable holes of each clamping block (6), and elastic components for driving the pressing blocks (8) to move towards the direction of the fixed plate (1) are arranged on the surfaces of the clamping blocks (6);
the elastic assembly comprises a fixed block (9) fixedly arranged on the clamping block (6), a straight rod (10) fixedly arranged on the fixed block (9), a first telescopic spring (11) sleeved on the straight rod (10) and a connecting block (12) slidably sleeved on the straight rod (10), two ends of the first telescopic spring (11) are fixedly connected with the connecting block (12) and the fixed block (9) respectively, and the connecting block (12) is fixedly connected with the pressing block (8);
rectangular blocks (14) are fixedly arranged on the surface of the fixed plate (1), round holes are symmetrically formed in the surface of each rectangular block (14), vertical rods (15) are inserted in the round holes in a sliding mode, a top plate (16) is fixedly arranged at one end of each vertical rod (15), a stop block (17) is fixedly arranged at the other end of each vertical rod (15), second telescopic springs (18) are sleeved on the two vertical rods (15), and two ends of each second telescopic spring (18) are fixedly connected with the top plate (16) and the rectangular block (14) respectively;
the side surface of the top plate (16) is provided with a mounting hole, L-shaped limiting blocks (19) are symmetrically and slidably arranged in the mounting hole, and a transmission assembly for driving the two limiting blocks (19) to mutually move is arranged in the mounting hole;
the transmission assembly comprises a spur gear (20) rotatably installed in the installation hole, two rack bars (21) fixedly installed on the two limiting blocks (19) respectively, and a rotating shaft (22) fixedly installed on the spur gear (20), wherein the two rack bars (21) are in meshed connection with the spur gear (20), and one end of the rotating shaft (22) penetrates out of the installation hole and is fixedly provided with a second adjusting wheel (23);
the utility model discloses a fixed disk type roller, including axis of rotation (22) fixed surface, axis of rotation (22) fixed surface has cup jointed spacing wheel (24), roof (16) surface symmetry fixed mounting has supporting shoe (25), two sliding hole has all been seted up on supporting shoe (25) surface, two equal slidable mounting has slide bar (26) in the sliding hole, two equal fixed mounting of one end of slide bar (26) has arc contact block (27), two equal fixed mounting of the other end of slide bar (26) has pull block (28), two all overlap on slide bar (26) is equipped with third expansion spring (29), two the both ends of third expansion spring (29) respectively with arc contact block (27) and supporting shoe (25) fixed connection.
2. The interface device of the GIS partial discharge test sensor according to claim 1, wherein a plurality of positioning holes are formed in the surface of the fixing plate (1), and positioning pins (13) are inserted into the positioning holes.
3. The interface device of the GIS partial discharge test sensor according to claim 1, wherein the rectangular block (14) is rotatably provided with shielding plates (30), the surface of the fixed plate (1) is symmetrically and fixedly provided with strip-shaped rods (31), the surfaces of the two strip-shaped rods (31) are provided with a plurality of positioning grooves, the two side surfaces of the shielding plates (30) are rotatably provided with supporting rods (32), and one ends of the two supporting rods (32) are respectively inserted into one positioning groove.
4. The interface device of the GIS partial discharge test sensor according to claim 1, wherein protection pads are fixedly arranged on the surfaces of the clamping block (6), the pressing block (8), the top plate (16) and the limiting block (19), and a plurality of protection pads are made of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310984823.1A CN117007924B (en) | 2023-08-07 | 2023-08-07 | Interface device of GIS partial discharge test sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310984823.1A CN117007924B (en) | 2023-08-07 | 2023-08-07 | Interface device of GIS partial discharge test sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117007924A CN117007924A (en) | 2023-11-07 |
| CN117007924B true CN117007924B (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310984823.1A Active CN117007924B (en) | 2023-08-07 | 2023-08-07 | Interface device of GIS partial discharge test sensor |
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| CN (1) | CN117007924B (en) |
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| CN115614608A (en) * | 2022-09-26 | 2023-01-17 | 国网河南省电力公司唐河县供电公司 | Auxiliary installation device for partial discharge sensor of GIS (gas insulated switchgear) |
| CN218259460U (en) * | 2022-11-01 | 2023-01-10 | 北京交通大学 | Transport case |
| CN219071469U (en) * | 2022-12-06 | 2023-05-26 | 贾春红 | Drainage bottle fixing and protecting device |
| CN219468397U (en) * | 2022-12-30 | 2023-08-04 | 武汉泽华塑料制品有限公司 | Accommodating tool for extrusion type plastic working clothes |
| CN116214401A (en) * | 2023-03-30 | 2023-06-06 | 无锡德盛互感器有限公司 | Voltage transformer positioning tool |
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| CN117007924A (en) | 2023-11-07 |
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