CN217808257U - Manhole cover plate dismounting device - Google Patents
Manhole cover plate dismounting device Download PDFInfo
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- CN217808257U CN217808257U CN202221984686.9U CN202221984686U CN217808257U CN 217808257 U CN217808257 U CN 217808257U CN 202221984686 U CN202221984686 U CN 202221984686U CN 217808257 U CN217808257 U CN 217808257U
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- cover plate
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Abstract
The utility model belongs to the technical field of the nuclear power, a manhole cover plate dismouting device is disclosed. The manhole cover plate dismounting device is mainly used for dismounting a manhole cover plate which is used for sealing a channel of an auxiliary boiler, and a fastening screw is fixed on the manhole cover plate. This manhole cover plate dismouting device includes the direction subassembly and lifts by crane the subassembly, and the direction subassembly is connected in fastening screw, can be at the motion trail of dismouting in-process control manhole cover plate, lifts by crane the subassembly and includes first splint and second splint, and first splint and second splint press from both sides respectively and locate fastening screw's both sides, and first splint and second splint all can be dismantled and connect in fastening screw, set up on the first splint and lift by crane the piece, lift by crane the piece and be used for connecting hoisting device. This manhole cover plate dismouting device can act on hoisting device's pulling force in fastening screw and then act on manhole cover plate, and the motion trail of manhole cover plate can be controlled to the direction subassembly, has both avoided the numerous steps of building the scaffold frame, can guarantee the security of manhole cover plate dismouting in-process again.
Description
Technical Field
The utility model relates to a nuclear power technology field especially relates to a manhole cover plate dismouting device.
Background
The auxiliary boiler can provide qualified steam for an auxiliary steam user to use during the startup, load shedding and shutdown of the unit, and is an important part in the nuclear power unit. The auxiliary boiler arranges in auxiliary boiler room, need carry out the disintegration inspection every year in order to clear up inside deposit, but because auxiliary boiler's manhole cover plate is for falling the sealed formula, is connected with fastening screw on the manhole cover plate, leads to manhole cover plate can not take out via the manhole, and the dismouting has certain degree of difficulty in carrying out the disintegration inspection.
The scaffold frame usually need be set up among the prior art, uses the supplementary dismouting of rope traction mode, and at the dismouting in-process, because the unbalanced problem that appears colliding with sealed face of atress easily, the maintenance process has great industrial safety risk, and the maintenance quality is difficult to guarantee.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a manhole cover plate dismouting device, this manhole cover plate dismouting device can be convenient for personnel control manhole cover plate's direction, can avoid colliding with the sealed face of falling sealed manhole cover plate, guarantee the maintenance quality.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a manhole cover plate dismouting device for the dismouting falls sealed manhole cover plate, and manhole cover plate sets up inside auxiliary boiler for seal auxiliary boiler's manhole, is fixed with fastening screw on the manhole cover plate, and manhole cover plate dismouting device includes:
the guide assembly is connected to the fastening screw and used for controlling the motion track of the manhole cover plate;
the lifting assembly comprises a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate are respectively clamped at two sides of the fastening screw rod, the first clamping plate and the second clamping plate are detachably connected to the fastening screw rod, a lifting piece is arranged on the first clamping plate, and the lifting piece is used for being connected with a lifting device.
As preferred, first splint have first arc surface, and the second splint have the second arc surface, and first arc surface and second arc surface homoenergetic are closely laminated with fastening screw, and first splint have first connecting hole, and the second splint have the second connecting hole, and first bolt passes first connecting hole and second connecting hole in proper order after with first nut spiro union, with first splint, second splint connect in fastening screw.
Preferably, the guide assembly comprises a guide rod and a connecting piece, the connecting piece is detachably connected with the fastening screw, and the guide rod is connected with the connecting piece.
Preferably, the guide bar has a curvature.
Preferably, the guide bar is arranged obliquely with respect to the connecting piece.
Preferably, the connecting piece is provided with a first threaded hole, and the first threaded hole is in threaded connection with the fastening screw.
Preferably, the guide rod is provided with a first through hole, the connecting piece is provided with a second through hole, and the spring pin sequentially penetrates through the first through hole and the second through hole to connect the guide rod with the connecting piece.
Preferably, manhole cover plate dismouting device still includes the sealing member mounting, and the sealing member mounting can be dismantled with the second splint and be connected.
Preferably, the second clamping plate is provided with a clamping pin, and the sealing element fixing piece is provided with a clamping groove which is in clamping fit with the clamping groove.
Preferably, the first clamping plate further has a third arc surface, the second clamping plate further has a fourth arc surface, the third arc surface and the fourth arc surface are correspondingly arranged, the third arc surface and the fourth arc surface form a connecting portion, the connecting portion is used for connecting a crowbar, and the crowbar is used for adjusting the position of the manhole cover plate.
The utility model has the advantages that:
the utility model discloses a manhole cover plate dismouting device, a sealed manhole cover plate falls for in dismouting auxiliary boiler in the disintegration inspection, it is fixed with fastening screw to fall on the sealed manhole cover plate, this manhole cover plate dismouting device includes the direction subassembly and lifts by crane the subassembly, the direction subassembly is connected in fastening screw, can control the orbit of manhole cover plate through this direction subassembly, avoid manhole cover plate to bump the auxiliary boiler inner wall and lead to sealed face to appear the damage, avoid the manhole to seal untight, it includes first splint and second splint to lift by crane the subassembly, first splint can detachably connect in fastening screw with the second splint, it lifts by crane to set up on the first splint, it can connect hoisting device to lift by crane the piece, can exert the pulling force to the manhole cover plate through external force, guarantee the safety of manhole cover plate dismouting in-process, ensure the maintenance quality.
Drawings
FIG. 1 is a schematic view of the manhole cover plate mounting and dismounting device of the present invention;
FIG. 2 is a schematic diagram of the structure of the manhole cover plate;
FIG. 3 is a schematic view of the connection between the guiding assembly and the manhole cover plate;
fig. 4 is a partially enlarged view of a in fig. 3 according to the present invention;
FIG. 5 is a schematic view of the connection between the lifting assembly and the manhole cover plate;
fig. 6 is a partially enlarged view of B in fig. 5 according to the present invention;
fig. 7 is another view angle schematic diagram of the connection between the lifting assembly and the manhole cover plate;
fig. 8 is an enlarged view of a portion C of fig. 6 according to the present invention;
fig. 9 is a partially enlarged view of D in fig. 6 according to the present invention.
In the figure:
2. an auxiliary boiler; 201. a manhole; 202. a manhole cover plate; 2021. fastening a screw rod; 203. overhauling the platform;
10. a guide assembly; 11. a guide bar; 12. a connecting member; 121. a spring pin;
20. a hoisting assembly; 21. a first splint; 211. a hoisting member; 212. a first arc surface; 214. a third arc surface; 22. a second splint; 221. a second arc surface; 223. a bayonet lock; 224. a fourth arc surface; 30. A seal retainer; 31. a clamping groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. 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", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular 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 be limiting.
With the gradual depletion of traditional petrochemical energy and the gradual and prominent negative effects of burning fossil energy on human living environment, nuclear power is an indispensable alternative energy in both economy and environmental protection, and compared with other energy, nuclear power has the characteristics of cleanness, environmental protection, low consumption and small occupied area. The auxiliary boiler can provide qualified steam to the auxiliary steam system for use by a user together with auxiliary steam during the startup, load shedding and shutdown of the unit, and is an important part in the nuclear power unit. Auxiliary boiler arranges in auxiliary boiler room, need carry out the disintegration inspection every year in order to clear up inside deposit, but because auxiliary boiler's manhole cover plate is the fall sealed type, is connected with fastening screw on the manhole cover plate, leads to manhole cover plate can not take out via the manhole, and the dismouting has certain degree of difficulty in carrying out the disintegration inspection, and the sealed face that the sealed face of manhole cover plate can collide with auxiliary boiler slightly leads to manhole cover plate's sealed face impaired.
Accordingly, the present embodiment provides a manhole cover plate dismounting device.
As shown in fig. 1 to 4, the manhole cover plate dismounting device disclosed in this embodiment is used for dismounting a manhole cover plate 202 of an auxiliary boiler 2, the manhole cover plate 202 is used for sealing a manhole 201 of the auxiliary boiler 2, a fastening screw 2021 is fixed on the manhole cover plate 202, the manhole cover plate dismounting device includes a guide assembly 10 and a lifting assembly 20, the guide assembly 10 is connected to the fastening screw 2021, the guide assembly 10 is used for controlling a movement track of the manhole cover plate 202, the lifting assembly 20 includes a first clamping plate 21 and a second clamping plate 22, the first clamping plate 21 and the second clamping plate 22 are detachably connected to the fastening screw 2021, a lifting member 211 is arranged on the first clamping plate 21, and the lifting member 211 is used for connecting a lifting device. Specifically, in this embodiment, be provided with two fastening screw 2021 on manhole cover plate 202, correspondingly, manhole cover plate dismouting device includes two direction subassemblies 10, and two direction subassemblies 10 are connected respectively in two fastening screw 2021, can avoid manhole cover plate 202 that a direction subassembly 10 became invalid and arouse to fall, guarantee the stationarity of dismouting in-process manhole cover plate 202 to need not set up the scaffold frame, reduced extra work. The lifting assembly 20 comprises a first clamping plate 21 and a second clamping plate 22, the first clamping plate 21 and the second clamping plate 22 are respectively clamped on two sides of the fastening screw 2021, the first clamping plate 21 and the second clamping plate 22 are respectively detachably connected to the fastening screw 2021, the lifting piece 211 is arranged on the first clamping plate 21, the lifting piece 211 is a circular ring, the circular ring can be connected with a lifting device, the lifting device is enabled to apply lifting force to the manhole cover plate 202 based on the fastening screw 2021 by the aid of the structure, and people can conveniently disassemble and assemble the manhole cover plate 202. When manhole cover 202 seals manhole 201, be connected with preforming and fastening nut on two fastening screw 2021 respectively, fastening nut compresses tightly the preforming on the pore wall of manhole 201, when carrying out manhole cover 202 dismouting, earlier with first splint 21, second splint 22 connects on two fastening screw 2021, hoisting device is connected to the ring, avoid manhole cover 202 to drop in the dismouting in-process, unscrew the fastening nut of one side again, dismantle the preforming, and connect one of them guide assembly 10 in the fastening screw 2021 who dismantles the preforming, personnel hand guide assembly 10 one end, the position of control manhole cover 202, again with the preforming and the fastening nut of opposite side pull down, connect another guide assembly 10 in another fastening screw 2021, then simultaneous control hoisting device and guide assembly 10, slowly descend manhole cover 202 to the maintenance platform 203 in the auxiliary boiler 2 and overhaul, can avoid manhole cover 202 and the 2 inner wall collision to lead to the impaired condition of manhole cover 202 to take place.
Further, as shown in fig. 5, the first clamping plate 21 has a first arc surface 212, the second clamping plate 22 has a second arc surface 221, both the first arc surface 212 and the second arc surface 221 can be tightly attached to the fastening screw 2021, the first clamping plate 21 has a first connecting hole, the second clamping plate 22 has a second connecting hole, the first bolt sequentially passes through the first connecting hole and the second connecting hole and is screwed to the first nut, and the first clamping plate 21 and the second clamping plate 22 are connected to the fastening screw 2021. Specifically, in this embodiment, the first clamping plate 21 has two first arc surfaces 212, the second clamping plate 22 has two second arc surfaces 221, and two first arc surfaces 212 and two second arc surfaces 221 can correspond the cooperation respectively, first arc surface 212, the second arc surface 221 closely laminates with fastening screw 2021, and first clamping plate 21 has a first connecting hole, the second clamping plate 22 has a second connecting hole, and first connecting hole corresponds with the second connecting hole to be switched on, first bolt passes first connecting hole and second connecting hole in proper order and then with first nut spiro union, connect first clamping plate 21, second clamping plate 22 in fastening screw 2021, guarantee that the lifting force of hoisting device can act on manhole cover plate 202 based on fastening screw 2021, guarantee manhole cover plate 202 safety in the lift process.
Further, as shown in fig. 3, the guide assembly 10 includes a guide rod 11 and a connector 12, the connector 12 is detachably connected to the fastening screw 2021, and the guide rod 11 is connected to the connector 12. Specifically, in this embodiment, the split type guide rods 11 and the connecting pieces 12 can adapt the guide assembly 10 to the auxiliary boilers 2 with different depths by replacing the guide rods 11 with different lengths, and can also adapt to different manhole cover plates 202 of the fastening screws 2021 by replacing different connecting pieces 12, so that the flexibility of the guide assembly 10 can be increased.
Further, the guide bar 11 has a curvature. Specifically, the guide rod 11 with the radian can have better flexibility and convenient use when controlling the track of the manhole cover plate 202.
Further, the guide bar 11 is disposed obliquely to the link 12. Specifically, in this embodiment, the inclined guide rod 11 can ensure that the manhole cover 202 is more flexible when being adjusted in position, and the manhole cover 202 is conveniently placed on the maintenance platform 203.
Further, the connecting member 12 has a first threaded hole, which is threadedly engaged with the fastening screw 2021. Specifically, in this embodiment, the connecting member 12 is cylindrical, a first threaded hole is processed at one end of the connecting member 12, the first threaded hole can be screwed with the fastening screw 2021 of the manhole cover plate 202, the connecting member 12 is connected to the fastening screw 2021, the connecting member 12 is processed into the first threaded hole, and can be in threaded connection with the fastening screw 2021, so that the connecting member 12 is simple to assemble and disassemble, and stable in connection, and the reliability of connection between the connecting member 12 and the fastening screw 2021 can be ensured.
Further, the guide rod 11 has a first through hole, the connecting member 12 has a second through hole, and the spring pin 121 sequentially passes through the first through hole and the second through hole to connect the guide rod 11 and the connecting member 12. Specifically, in this embodiment, the second through hole on the connecting member 12 is inclined to the axis of the connecting member 12, so that the guide rod 11 is inclined relative to the connecting member 12, which is convenient for controlling the movement track of the manhole cover plate 202, and the guide rod 11 is connected with the connecting member 12 through the spring pin 121, which is simple in structure and convenient for disassembly and assembly.
Further, as shown in fig. 6 to 8, the manhole cover plate mounting and dismounting device further includes a sealing member fixing member 30, and the sealing member fixing member 30 is detachably connected to the second clamping plate 22. Specifically, in this embodiment, seal through the sealing member between manhole cover plate 202 and manhole 201, and the sealing member is the rubber circle, and when installing manhole cover plate 202, the rubber circle must be located the sealed face of manhole cover plate 202, just can reach better sealed effect, and sealing member mounting 30 is oval-shaped, and is unanimous with the shape of the sealed face of manhole cover plate 202, and sealing member mounting 30 can be with the rubber circle chucking in the outside of sealing member mounting 30. The sealing member fixing member 30 can ensure that the sealing member can be located on the sealing surface of the manhole cover plate 202 when the manhole cover plate 202 is installed, thereby ensuring the sealing effect of the auxiliary boiler 2. Sealing member mounting 30 can be dismantled with second splint 22 and be connected, carries out manhole cover 202 dismantles the in-process, needn't install sealing member mounting 30, can reduce external disturbance to a certain extent, guarantees the normal clear of dismantlement work, and carrying out manhole cover 202 installation, sealing member mounting 30 can be dismantled with second splint 22 and be connected, can guarantee that the sealing member installation targets in place, has guaranteed the effect of overhauing.
Further, the second clamping plate 22 is provided with a clamping pin 223, the sealing element fixing member 30 is provided with a clamping groove 31, and the clamping pin 223 is in clamping fit with the clamping groove 31. Specifically, in this embodiment, the second clamp plate 22 is provided with two parallel clamping pins 223, the clamping pin 223 is attached to the manhole cover plate 202, the sealing element fixing member 30 is provided with two clamping grooves 31, the two clamping grooves 31 correspond to the clamping fit with the two clamping pins 223, and the sealing element fixing member is simple in structure, convenient to disassemble and assemble and convenient to use.
Further, the first clamping plate 21 further has a third arc surface 214, the second clamping plate 22 further has a fourth arc surface 224, the third arc surface 214 and the fourth arc surface 224 are correspondingly disposed, and the third arc surface 214 and the fourth arc surface 224 form a connecting portion for connecting a crowbar, which is used for adjusting the position of the manhole cover plate 202. Specifically, in this embodiment, when manhole cover plate 202 is installed, the situation that manhole cover plate 202 and manhole 201 are difficult to align can occur, first clamp plate 21 has third arc surface 214, second clamp plate 22 has fourth arc surface 224, third arc surface 214 and fourth arc surface 224 are buckled to form a connecting portion, the connecting portion is in a circular ring shape, a crowbar can be accommodated, when manhole cover plate 202 is installed, if manhole cover plate 202 shifts, the crowbar can be connected to the connecting portion, the crowbar is used for prying manhole cover plate 202, manhole cover plate 202 and manhole 201 are aligned when manhole cover plate 202 is installed, and it is ensured that manhole cover plate 202 after being overhauled can be accurately installed in manhole 201.
The disassembly inspection of the auxiliary boiler 2 is divided into two processes, disassembly and assembly, respectively. During disassembly, the hoisting assembly 20 is firstly required to be connected to the two fastening screws 2021 of the manhole cover plate 202, and the lifting device is connected to the hoisting piece 211, so that the manhole cover plate 202 cannot fall off when the pressing sheet and the fastening nut are disassembled from the fastening screws 2021; then, the fastening nut of the fastening screw 2021 on one side is unscrewed, the pressing sheet is taken down, and a guide assembly 10 is connected to the fastening screw 2021, so that a person can control the running track of the manhole cover plate 202 by holding the guide rod 11 with hands, and the manhole cover plate 202 is prevented from being changed in position and colliding with the inner wall of the auxiliary boiler 2 when the fastening nut and the pressing sheet of the fastening screw 2021 on the other side are taken down; then, the fastening nut and the pressing sheet of the fastening screw 2021 on the other side are taken down, and the guide assembly 10 is also connected to the fastening screw 2021 on the other side, so that the manhole cover plate 202 can be prevented from colliding with the inner wall of the auxiliary boiler 2 due to the failure of the guide assembly 10 on one side; the lifting device is then controlled to slowly place the manhole cover 202 on the access platform 203, thus completing the removal of the manhole cover 202. During installation, the two guide assemblies 10 are respectively connected to the two fastening screws 2021, the lifting assembly 20 is connected to the two fastening screws 2021, and the clamping groove 31 of the sealing element fixing member 30 is required to be clamped and matched with the clamping pin 223 of the second clamping plate 22 and clamp the sealing element on the outer side of the sealing element fixing member 30; controlling the lifting device to lift the manhole cover plate 202 upwards, and controlling the running track of the manhole cover plate 202 by a person through holding the guide rod 11 during the period so as to avoid the manhole cover plate 202 colliding with the inner wall of the auxiliary boiler 2; when the manhole cover plate 202 is in contact with the manhole 201, if the position of the manhole cover plate 202 is deviated, a crowbar can be connected to the connecting part to pry the manhole cover plate 202 to reach the correct position; and then detaching the sealing element fixing part 30, detaching the guide assembly 10 on one side, installing the pressing sheet and the fastening nut, preliminarily locking the manhole cover plate 202, detaching the guide assembly 10 on the other side, installing the pressing sheet and the fastening nut, sequentially rotating the two fastening nuts until the manhole cover plate 202 is installed in place, detaching the hoisting assembly 20, and completing the installation of the manhole cover plate 202.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a manhole cover dismouting device for dismouting falls sealed manhole cover (202), manhole cover (202) set up inside auxiliary boiler (2), are used for sealing manhole (201) of auxiliary boiler (2), be fixed with fastening screw (2021) on manhole cover (202), its characterized in that, manhole cover dismouting device includes:
the guide assembly (10), the guide assembly (10) is connected to the fastening screw rod (2021), and the guide assembly (10) is used for controlling the motion track of the manhole cover plate (202);
the lifting assembly (20) comprises a first clamping plate (21) and a second clamping plate (22), the first clamping plate (21) and the second clamping plate (22) are respectively clamped on two sides of the fastening screw rod (2021), the first clamping plate (21) and the second clamping plate (22) are detachably connected to the fastening screw rod (2021), a lifting piece (211) is arranged on the first clamping plate (21), and the lifting piece (211) is used for being connected with a lifting device.
2. The manhole cover plate dismounting device according to claim 1, wherein the first clamping plate (21) has a first arc surface (212), the second clamping plate (22) has a second arc surface (221), the first arc surface (212) and the second arc surface (221) can be tightly attached to the fastening screw (2021), the first clamping plate (21) has a first connecting hole, the second clamping plate (22) has a second connecting hole, a first bolt passes through the first connecting hole and the second connecting hole in sequence and then is in threaded connection with a first nut, and the first clamping plate (21) and the second clamping plate (22) are connected to the fastening screw (2021).
3. Manhole cover plate removing and mounting device according to claim 1, wherein the guide assembly (10) comprises a guide rod (11) and a connecting piece (12), the connecting piece (12) is detachably connected with the fastening screw (2021), and the guide rod (11) is connected with the connecting piece (12).
4. A manhole cover plate removing and mounting device according to claim 3, wherein the guide bar (11) has a curvature.
5. Manhole cover plate removing device according to claim 4, wherein the guide bar (11) is arranged obliquely with respect to the connecting piece (12).
6. A manhole cover plate removing and mounting device according to claim 3, wherein the connecting piece (12) has a first threaded hole, and the first threaded hole is screwed with the fastening screw (2021).
7. A manhole cover plate assembly and disassembly apparatus according to claim 3, wherein the guide rod (11) has a first through hole, the connecting member (12) has a second through hole, and a spring pin (121) passes through the first through hole and the second through hole in sequence to connect the guide rod (11) and the connecting member (12).
8. A manhole cover assembly and disassembly apparatus according to claim 1, further comprising a sealing member fixing member (30), wherein the sealing member fixing member (30) is detachably connected to the second clamping plate (22).
9. A manhole cover plate assembly and disassembly device according to claim 8, wherein the second clamping plate (22) is provided with a clamping pin (223), the sealing element fixing member (30) is provided with a clamping groove (31), and the clamping pin (223) is in clamping fit with the clamping groove (31).
10. A manhole cover plate mounting and dismounting device according to any one of claims 1 to 9, wherein the first clamping plate (21) further has a third arc surface (214), the second clamping plate (22) further has a fourth arc surface (224), the third arc surface (214) and the fourth arc surface (224) are correspondingly arranged, and the third arc surface (214) and the fourth arc surface (224) form a connecting part for connecting a crowbar, and the crowbar is used for adjusting the position of the manhole cover plate (202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221984686.9U CN217808257U (en) | 2022-07-29 | 2022-07-29 | Manhole cover plate dismounting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221984686.9U CN217808257U (en) | 2022-07-29 | 2022-07-29 | Manhole cover plate dismounting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217808257U true CN217808257U (en) | 2022-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221984686.9U Active CN217808257U (en) | 2022-07-29 | 2022-07-29 | Manhole cover plate dismounting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217808257U (en) |
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2022
- 2022-07-29 CN CN202221984686.9U patent/CN217808257U/en active Active
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