CN113175063A - Protection device of explosion-proof floor drain and construction method of explosion-proof floor drain - Google Patents
Protection device of explosion-proof floor drain and construction method of explosion-proof floor drain Download PDFInfo
- Publication number
- CN113175063A CN113175063A CN202110367524.4A CN202110367524A CN113175063A CN 113175063 A CN113175063 A CN 113175063A CN 202110367524 A CN202110367524 A CN 202110367524A CN 113175063 A CN113175063 A CN 113175063A
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- Prior art keywords
- explosion
- floor drain
- leakage
- proof floor
- pull
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0407—Floor drains for indoor use
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/06—Gully gratings
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/06—Gully gratings
- E03F2005/065—Gully gratings with elastic locking elements
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Building Environments (AREA)
Abstract
The invention relates to the technical field of drainage floor drains and discloses a protective device of an explosion-proof floor drain, which comprises a leakage body and a leakage cover which are matched, wherein the leakage body and the leakage cover are made of explosion-proof materials; the protection mechanism comprises a drawing hole, the drawing hole is formed in the center of the leakage cover, the upper end of the leakage cover is connected with a support frame, a pull rod is inserted into the drawing hole, the two ends of the pull rod penetrate through the drawing hole and extend outwards, a drawing disc is fixedly connected to the lower end of the pull rod, transmission rods are symmetrically hinged to the annular side wall of the drawing disc, and a positioning pin is hinged to the other end of each transmission rod. The protection device of the anti-explosion floor drain and the construction method of the anti-explosion floor drain can solve the problems that the reverse anti-explosion function of the existing anti-explosion floor drain is unreliable, the effective protection effect is lacked, and the working stability of the anti-explosion floor drain is reduced.
Description
Technical Field
The invention relates to the technical field of drainage floor drains, in particular to a protection device of an explosion-proof floor drain and a construction method of the explosion-proof floor drain.
Background
The anti-explosion floor drain is one of floor drains, is mainly used for civil air defense engineering basements and is used for discharging water in the basements at ordinary times, when the existing anti-explosion floor drain is subjected to shock waves from a water outlet to a water inlet, particularly when the directions of nuclear explosion shock waves are changed alternately, the reverse anti-explosion function of the existing anti-explosion floor drain is unreliable, the effective protection effect is lacked, and the working stability of the anti-explosion floor drain is reduced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the protection device of the explosion-proof floor drain and the construction method of the explosion-proof floor drain, which have the advantage of improving the working stability of the explosion-proof floor drain and solve the problems that the reverse explosion-proof function of the conventional explosion-proof floor drain is unreliable, the effective protection effect is lacked, and the working stability of the explosion-proof floor drain is reduced.
(II) technical scheme
In order to realize the purpose of improving the working stability of the explosion-proof floor drain, the invention provides the following technical scheme: a protection device of an explosion-proof floor drain comprises a drain body and a drain cover which are matched, wherein the drain body and the drain cover are made of explosion-proof materials, the drain cover is arranged in the drain body, a support ring is fixedly connected to the inner side wall of the drain body, the drain cover is arranged at the upper end of the support ring, and the drain cover is connected with the inner side wall of the drain body through a protection mechanism;
protection machanism is including drawing the hole, draw the hole to set up in the center department that leaks the lid, the upper end that leaks the lid is connected with the support frame, draw the downthehole interpolation and be equipped with the pull rod, and the both ends of pull rod pass the trompil and outwards extend, the lower extreme fixedly connected with drawing the dish of pull rod, the symmetry articulates on the annular lateral wall of drawing the dish has the transfer line, the other end of transfer line articulates there is the locating pin, the locating pin is connected with the lower extreme that leaks the lid through supporting component, is located be the even equidistance of annular and set up a plurality of and locating pin assorted constant head tank on the internal lateral wall of hourglass of support ring below, the one end that the pull rod was kept away from to the locating pin is inserted and is established in the constant head tank that corresponds.
Preferably, the upper end of the leakage cover is connected with the leakage body through two reinforcing mechanisms, the reinforcing mechanisms comprise transmission grooves, the transmission grooves are formed in the inner side wall of the leakage body and are located above the support ring, springs are fixedly connected to the bottoms of the transmission grooves, positioning blocks are fixedly connected to the other ends of the springs, one ends, far away from the springs, of the positioning blocks penetrate through the notches of the transmission grooves and extend outwards, and the positioning blocks located outside the transmission grooves are arranged at the upper end of the leakage cover.
Preferably, the top of the inner part of the supporting frame is hinged with a top column, and the lower end of the top column is arranged at the upper end of the pull rod.
Preferably, the supporting component comprises a supporting plate, the supporting plate is fixedly connected to the lower end of the leakage cover, matched supporting holes are formed in the positions, corresponding to the positioning pins, of the supporting plate, and the positioning pins penetrate through the supporting holes.
Preferably, the side wall of the positioning pin, which is far away from one end of the transmission rod, is fixedly sleeved with the anti-falling block.
Preferably, the rod wall of the pull rod close to the upper end is fixedly sleeved with a pull ring, and the pull ring is arranged above the leakage cover.
Preferably, a sealing groove is formed in the annular side wall of the leakage cover, a sealing ring is sleeved in the sealing groove, and the outer annular wall of the sealing ring is arranged on the inner side wall of the leakage body.
Preferably, the lower end of the pull disc is provided with a support bracket, and the support bracket is fixedly connected to the inner side wall of the drain body.
Preferably, the side wall of the positioning block close to one end of the spring is symmetrically and fixedly connected with sliding blocks, the groove wall of the transmission groove is provided with matched sliding grooves corresponding to the sliding blocks, and the sliding blocks are slidably connected in the corresponding sliding grooves.
A construction method of an explosion-proof floor drain comprises the following steps:
s1: selecting a model of the explosion-proof floor drain with a slightly larger volume in advance, placing the model at a preset position of the floor drain according to a design drawing, and pouring the ground;
s2: after the ground concrete is in a semi-dry state, taking out the model from the ground to form a reserved mounting hole of the explosion-proof floor drain;
s3: after the concrete is completely hardened, installing the anti-explosion floor drain in the reserved mounting hole, filling the adhesive, and reinforcing the connection between the anti-explosion floor drain and the reserved mounting hole;
s4: and (5) performing a water filling test to check whether leakage exists.
(III) advantageous effects
Compared with the prior art, the invention provides a protection device of an explosion-proof floor drain and a construction method of the explosion-proof floor drain, and the protection device has the following beneficial effects:
1. this protector of explosion-proof floor drain, through setting up protection mechanism, the locating pin inserts in the constant head tank that corresponds, when needs will leak the lid when the dismouting from leaking the body, when holding the support frame, the pull rod is cliied to two fingers, upwards pulling force is applyed to the pull rod, the pull rod drives the synchronous upward movement of drawing disk in the trompil while upward movement, two articulated transfer line atress back drive two locating pins and move in opposite directions, extract from two inserted constant head tanks, can get the hourglass lid this moment, through the locating pin that inserts in the constant head tank, will leak the lid and leak the firm connection of body and be in the same place, prevent to leak the lid and take place to break away from leaking the body when receiving the impact force that makes progress, protect the floor drain to explosion-proof floor drain, improve explosion-proof floor drain job stabilization nature.
2. This protector of explosion-proof floor drain, through setting up strengthening mechanism, the locating piece top is in the upper end of leaking the lid, will leak the lid and press in leaking internally, improves explosion-proof floor drain job stabilization nature, when needs will leak the lid and get from leaking on the body and put, exerts the pressing force to the locating piece earlier for compression spring moves in to the constant head tank behind the locating piece atress, when the locating piece enters into the constant head tank completely after, can get to leak the lid and put.
3. This protector of explosion-proof floor drain, when the hourglass lid receives the impact force that makes progress with the drawing disk in the twinkling of an eye, the drawing disk promotes the high-speed upward movement of pull rod, and the fore-set keeps vertical high top at the interior top of support frame under receiving the effect of impact force in the twinkling of an eye, when not receiving horizontal effort and making the fore-set take place the slope, prevents the pull rod upward movement, improves explosion-proof floor drain job stabilization nature.
Drawings
FIG. 1 is a schematic structural diagram of a protection device of an explosion-proof floor drain provided by the invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is an enlarged view of portion B of FIG. 1;
fig. 4 is a schematic view of a leakage cover in a protection device of the explosion-proof floor drain provided by the invention.
In the figure: the device comprises a leakage body 1, a leakage cover 2, a support ring 3, a pull hole 4, a support frame 5, a pull rod 6, a pull disc 7, a transmission rod 8, a positioning pin 9, a positioning groove 10, a transmission groove 11, a spring 12, a positioning block 13, a top column 14, a support plate 15, a support hole 16, an anti-dropping block 17, a pull ring 18, a sealing groove 19, a sealing ring 20, a support bracket 21, a sliding block 22 and a sliding groove 23.
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.
Referring to fig. 1-4, a protection device for an explosion-proof floor drain comprises a drain body 1 and a drain cover 2 which are matched, wherein the drain body 1 and the drain cover 2 are made of explosion-proof materials, the drain cover 2 is arranged in the drain body 1, a support ring 3 is fixedly connected to the inner side wall of the drain body 1, the drain cover 2 is arranged at the upper end of the support ring 3, and the drain cover 2 is connected with the inner side wall of the drain body 1 through a protection mechanism;
the protection mechanism comprises a drawing hole 4, the drawing hole 4 is arranged at the center of the leakage cover 2, the upper end of the leakage cover 2 is connected with a support frame 5, a pull rod 6 is inserted in the drawing hole 4, two ends of the pull rod 6 penetrate through the drawing hole 4 and extend outwards, the lower end of the pull rod 6 is fixedly connected with a drawing disc 7, the annular side wall of the drawing disc 7 is symmetrically hinged with a transmission rod 8, the other end of the transmission rod 8 is hinged with a positioning pin 9, the positioning pin 9 is connected with the lower end of the leakage cover 2 through a support component, a plurality of positioning grooves 10 matched with the positioning pin 9 are uniformly and equidistantly arranged in an annular shape on the inner side wall of the leakage body 1 positioned below the support ring 3, one end of the positioning pin 9 far away from the pull rod 6 is inserted into the corresponding positioning groove 10, the positioning pin 9 is inserted into the corresponding positioning groove 10, when the leakage cover 2 needs to be disassembled from the leakage body 1, the support frame 15 is held, and the pull rod 6 is clamped by two fingers, exerting ascending pulling force to pull rod 6, pull rod 6 drives the synchronous upward movement of drawing disk 7 in trompil 4 while upward movement, two articulated transfer line 8 drive two locating pins 9 after the atress move in opposite directions, extract from two inserted constant head tanks 10, exert ascending pulling force when keeping pull rod 6 rigidity, can get this moment and put hourglass lid 2, through the locating pin 9 that inserts in the constant head tank 10, will leak lid 2 and leak body 1 firm the linking together, prevent that to leak lid 2 from taking place to break away from leaking body 1 when receiving upward impact force, protect explosion-proof floor drain, improve explosion-proof job stabilization nature.
The upper end of the leakage cover 2 is connected with the leakage body 1 through two arranged reinforcing mechanisms, each reinforcing mechanism comprises a transmission groove 11, the transmission grooves 11 are arranged on the inner side wall of the leakage body 1, the transmission groove 11 is positioned above the support ring 3, the bottom of the transmission groove 11 is fixedly connected with a spring 12, the other end of the spring 12 is fixedly connected with a positioning block 13, one end of the positioning block 13, far away from the spring 12, penetrates through the notch of the transmission groove 11 and extends outwards, the positioning block 13 positioned outside the transmission groove 11 is arranged at the upper end of the leakage cover 2, the positioning block 13 is propped against the upper end of the leakage cover 2 to press the leakage cover 2 in the leakage body 1, so that the working stability of the explosion-proof floor drain is improved, when the leakage cover 2 needs to be taken from or placed on the leakage body 1, a pressing force is firstly applied to the positioning block 13, so that the positioning block 13 is stressed and then the compression spring 12 moves towards the positioning groove 10, when the positioning block 13 completely enters the positioning groove 10, the leakage cover 2 can be taken and placed.
The interior top of support frame 5 articulates there is fore-set 14, and the lower extreme setting of fore-set 14 is in the upper end of pull rod 6, when leaking lid 2 and drawing dish 7 receive the impact force that makes progress in the twinkling of an eye, draws the high-speed upward movement of dish 7 promotion pull rod 6, and fore-set 14 keeps vertical high top at the interior top of support frame 5 under receiving the effect of impact force in the twinkling of an eye, when not receiving the manual work and applying transverse force and make fore-set 15 take place the slope, prevents pull rod 6 upward movement, improves explosion-proof floor drain job stabilization nature.
The supporting component comprises a supporting plate 15, the supporting plate 15 is fixedly connected to the lower end of the leakage cover 2, a supporting hole 16 matched with the position of the supporting plate 15 corresponding to the positioning pin 9 is formed, the positioning pin 9 penetrates through the supporting hole 16, and the positioning pin 9 is supported through the supporting plate 15.
The side wall of the positioning pin 9 far away from one end of the transmission rod 8 is fixedly sleeved with an anti-falling block 17 to prevent the positioning pin 9 from being separated from the support plate 15.
The rod wall of the pull rod 6 close to the upper end is fixedly sleeved with a pull ring 18, the pull ring 18 is arranged above the leakage cover 2, and two fingers clamping the pull rod 16 are prevented from being separated from the pull rod 6 through the pull ring 18.
The annular side wall of the leakage cover 2 is provided with a sealing groove 19, the sealing groove 19 is internally sleeved with a sealing ring 20, and the outer annular wall of the sealing ring 20 is arranged on the inner side wall of the leakage body 1, so that the sealing performance between the leakage cover 2 and the leakage body 1 is improved.
The lower extreme of drawing a set 7 is equipped with support bracket 21, and support bracket 21 fixed connection is on leaking the inside wall of body 1, supports drawing a set 7 through support bracket 21.
The side wall of the positioning block 13 close to one end of the spring 12 is symmetrically and fixedly connected with a sliding block 22, the groove wall of the transmission groove 11 corresponding to the sliding block 22 is provided with a matched sliding groove 23, the sliding block 22 is slidably connected in the corresponding sliding groove 23, and the positioning block 13 drives the sliding block 22 to synchronously move in the sliding groove 23 when moving, so that the positioning block 13 is prevented from being separated from the transmission groove 11.
A construction method of an explosion-proof floor drain comprises the following steps:
s1: selecting a model of the explosion-proof floor drain with a slightly larger volume in advance, placing the model at a preset position of the floor drain according to a design drawing, and pouring the ground;
s2: after the ground concrete is in a semi-dry state, taking out the model from the ground to form a reserved mounting hole of the explosion-proof floor drain;
s3: after the concrete is completely hardened, installing the anti-explosion floor drain in the reserved mounting hole, filling the adhesive, and reinforcing the connection between the anti-explosion floor drain and the reserved mounting hole;
s4: and (5) performing a water filling test to check whether leakage exists.
In summary, in the protection device of the anti-explosion floor drain, the positioning pins 9 are inserted into the corresponding positioning slots 10, when the drain cover 2 needs to be disassembled from the drain body 1, a pressing force is firstly applied to the positioning blocks 13, so that the positioning blocks 13 are stressed to compress the springs 12 to move towards the positioning slots 10, after the positioning blocks 13 completely enter the positioning slots 10, the support frame 15 is held, two fingers clamp the pull rod 6 to apply an upward pulling force to the pull rod 6, the pull rod 6 moves upwards in the pull hole 4 and simultaneously drives the pull disc 7 to move upwards synchronously, the two hinged transmission rods 8 are stressed to drive the two positioning pins 9 to move oppositely, the two positioning pins 9 are pulled out from the two inserted positioning slots 10, the pull rod 6 is kept to move upwards while applying an upward pulling force, at this time, the drain cover 2 can be taken and placed, the positioning pins 9 inserted into the positioning slots 10, the positioning blocks 13 are pressed against the upper end of the drain cover 2, the leakage cover 2 and the leakage body 1 are firmly connected together, so that the leakage cover 2 is prevented from being separated from the leakage body 1 when being subjected to upward impact force, and the explosion-proof floor drain is protected; when the leakage cover 2 and the pull disc 7 are subjected to upward impact force instantly, the pull disc 7 pushes the pull rod 6 to move upwards at a high speed, the top column 14 keeps vertical height to be propped against the inner top of the support frame 5 under the action of the instant impact force, and when the top column 15 is not subjected to manual transverse acting force to enable the top column to incline, the pull rod 6 is prevented from moving upwards, and the working stability of the anti-explosion floor drain is improved.
It is to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a protector of explosion-proof floor drain, leaks body (1) and leaks lid (2) including the assorted, its characterized in that: the leakage body (1) and the leakage cover (2) are made of explosion-proof materials, the leakage cover (2) is arranged in the leakage body (1), the inner side wall of the leakage body (1) is fixedly connected with a support ring (3), the leakage cover (2) is arranged at the upper end of the support ring (3), and the leakage cover (2) is connected with the inner side wall of the leakage body (1) through a protection mechanism;
the protection mechanism comprises a pull hole (4), the pull hole (4) is arranged at the center of the leakage cover (2), the upper end of the leakage cover (2) is connected with a supporting frame (5), a pull rod (6) is inserted in the pull hole (4), and two ends of the pull rod (6) penetrate through the pull holes (4) and extend outwards, the lower end of the pull rod (6) is fixedly connected with a pull disc (7), the annular side wall of the pull disc (7) is symmetrically hinged with transmission rods (8), the other end of the transmission rod (8) is hinged with a positioning pin (9), the positioning pin (9) is connected with the lower end of the leakage cover (2) through a supporting component, a plurality of positioning grooves (10) matched with the positioning pin (9) are uniformly arranged on the inner side wall of the leakage body (1) below the supporting ring (3) in an annular shape at equal intervals, one end of the positioning pin (9) far away from the pull rod (6) is inserted into the corresponding positioning groove (10).
2. The protection device of the explosion-proof floor drain according to claim 1, characterized in that: the upper end of leaking lid (2) is connected with leaking body (1) through the strengthening mechanism of two settings, strengthening mechanism includes transmission groove (11), set up on the inside wall of leaking body (1) transmission groove (11), and transmission groove (11) are located the top of support ring (3), the tank bottom fixedly connected with spring (12) of transmission groove (11), the other end fixedly connected with locating piece (13) of spring (12), the notch of transmission groove (11) is passed and outwards extends to the one end that spring (12) were kept away from in locating piece (13), is located the outer locating piece (13) of transmission groove (11) sets up in the upper end of leaking lid (2).
3. The protection device of the explosion-proof floor drain according to claim 1, characterized in that: the inner top of the support frame (5) is hinged with a top column (14), and the lower end of the top column (14) is arranged at the upper end of the pull rod (6).
4. The protection device of the explosion-proof floor drain according to claim 1, characterized in that: the supporting component comprises a supporting plate (15), the supporting plate (15) is fixedly connected to the lower end of the leakage cover (2), matched supporting holes (16) are formed in the positions, corresponding to the positioning pins (9), of the supporting plate (15), and the positioning pins (9) penetrate through the supporting holes (16).
5. The protection device of the explosion-proof floor drain according to claim 1, characterized in that: an anti-falling block (17) is fixedly sleeved on the side wall of the positioning pin (9) far away from one end of the transmission rod (8).
6. The protection device of the explosion-proof floor drain according to claim 1, characterized in that: the pull rod (6) is fixedly sleeved with a pull ring (18) on the rod wall close to the upper end, and the pull ring (18) is arranged above the leakage cover (2).
7. The protection device of the explosion-proof floor drain according to claim 1, characterized in that: the annular side wall of the leakage cover (2) is provided with a sealing groove (19), the sealing groove (19) is internally sleeved with a sealing ring (20), and the outer annular wall of the sealing ring (20) is arranged on the inner side wall of the leakage body (1).
8. The protection device of the explosion-proof floor drain according to claim 1, characterized in that: the lower end of the pull disc (7) is provided with a support bracket (21), and the support bracket (21) is fixedly connected to the inner side wall of the leakage body (1).
9. The protection device of the explosion-proof floor drain as claimed in claim 2, characterized in that: the positioning device is characterized in that sliding blocks (22) are symmetrically and fixedly connected to the side wall of the positioning block (13) close to one end of the spring (12), matched sliding grooves (23) are formed in the positions, corresponding to the sliding blocks (22), of the groove wall of the transmission groove (11), and the sliding blocks (22) are connected in the corresponding sliding grooves (23) in a sliding mode.
10. The construction method of the anti-explosion floor drain is characterized by comprising the following steps:
s1: selecting a model of the explosion-proof floor drain with a slightly larger volume in advance, placing the model at a preset position of the floor drain according to a design drawing, and pouring the ground;
s2: after the ground concrete is in a semi-dry state, taking out the model from the ground to form a reserved mounting hole of the explosion-proof floor drain;
s3: after the concrete is completely hardened, installing the anti-explosion floor drain in the reserved mounting hole, filling the adhesive, and reinforcing the connection between the anti-explosion floor drain and the reserved mounting hole;
s4: and (5) performing a water filling test to check whether leakage exists.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110367524.4A CN113175063A (en) | 2021-04-06 | 2021-04-06 | Protection device of explosion-proof floor drain and construction method of explosion-proof floor drain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110367524.4A CN113175063A (en) | 2021-04-06 | 2021-04-06 | Protection device of explosion-proof floor drain and construction method of explosion-proof floor drain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113175063A true CN113175063A (en) | 2021-07-27 |
Family
ID=76923069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110367524.4A Withdrawn CN113175063A (en) | 2021-04-06 | 2021-04-06 | Protection device of explosion-proof floor drain and construction method of explosion-proof floor drain |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113175063A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114744852A (en) * | 2022-04-24 | 2022-07-12 | 山东博诚电气有限公司 | High-voltage frequency converter protection device |
-
2021
- 2021-04-06 CN CN202110367524.4A patent/CN113175063A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114744852A (en) * | 2022-04-24 | 2022-07-12 | 山东博诚电气有限公司 | High-voltage frequency converter protection device |
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Application publication date: 20210727 |
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