CN220365535U - Grouting punching equipment - Google Patents

Grouting punching equipment Download PDF

Info

Publication number
CN220365535U
CN220365535U CN202321756399.7U CN202321756399U CN220365535U CN 220365535 U CN220365535 U CN 220365535U CN 202321756399 U CN202321756399 U CN 202321756399U CN 220365535 U CN220365535 U CN 220365535U
Authority
CN
China
Prior art keywords
seat
drill rod
grouting
buckle
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202321756399.7U
Other languages
Chinese (zh)
Inventor
苏宇
许晓澳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Huadong Civil Aviation Airport Construction Supervision Co ltd
Original Assignee
Shanghai Huadong Civil Aviation Airport Construction Supervision Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Huadong Civil Aviation Airport Construction Supervision Co ltd filed Critical Shanghai Huadong Civil Aviation Airport Construction Supervision Co ltd
Priority to CN202321756399.7U priority Critical patent/CN220365535U/en
Application granted granted Critical
Publication of CN220365535U publication Critical patent/CN220365535U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

The application relates to grouting and punching equipment, which comprises a puncher and a drill rod, wherein the puncher is slidably provided with a connecting seat which can extend or retract, and the connecting seat is provided with a connecting bayonet; one end of the drill rod is inserted into the connecting bayonet, a connecting clamping ring is arranged on the peripheral wall of one end of the drill rod, which is close to the connecting seat, and a connecting buckle used for being clamped on the connecting clamping ring is hinged to the side wall of the connecting seat at the connecting bayonet; the drill rod is detachably arranged on the connecting seat through the connecting buckle and the connecting clamping ring. The utility model provides a grouting equipment that punches can improve the dismouting convenience of drilling rod.

Description

Grouting punching equipment
Technical Field
The application relates to the technical field of punching equipment, in particular to grouting punching equipment.
Background
At present, cement grouting foundation reinforcement construction is commonly applied to various airports in China, and polymer grouting is gradually popularized as an emerging foundation reinforcement process; under the repeated action of the annual airplane load, the pavement foundation and the soil foundation of the runway, the taxiway and the apron cement concrete pavement are emptied to different degrees, so cement grouting and high polymer grouting can still be used as main foundation reinforcement construction processes in the future.
The pavement concrete should be punched before grouting, the punching depth is generally more than 90cm, and because the pavement slab has high strength and large punching depth, a puncher is needed to be used for punching the pavement; the drilling machine is provided with a connecting seat, the connecting seat is provided with a drill rod, one end of the drill rod is arranged on the connecting seat of the drilling machine in a bolt connection or threaded connection mode, the connecting seat is driven to extend or retract through the drilling machine, so that the drill rod is driven to reciprocate along the axial direction of the drill rod, the pavement is beaten, and a grouting hole with a certain depth is drilled in the pavement.
However, since the drill rod is mounted to the hole punch by means of a bolt connection or a screw connection, the bolt connection or the screw connection is inconvenient to be assembled and disassembled when the drill rod needs to be replaced because the drill rod has a certain length (more than 90 cm), and thus, further improvement is required.
Disclosure of Invention
In order to improve the dismouting convenience of drilling rod, this application provides a slip casting equipment of punching.
The application provides a grouting equipment that punches adopts following technical scheme:
the grouting punching equipment comprises a puncher and a drill rod, wherein the puncher is slidably provided with an extensible or contractible connecting seat, and the connecting seat is provided with a connecting bayonet; one end of the drill rod is inserted into the connecting bayonet, a connecting clamping ring is arranged on the peripheral wall of one end, close to the connecting seat, of the drill rod, and a connecting buckle used for being clamped with the connecting clamping ring is hinged to the side wall of the connecting seat, located at the connecting bayonet; the drill rod is detachably mounted on the connecting seat through the connecting buckle and the connecting clamping ring.
Through adopting the technical scheme, through the setting of connecting buckle and connection snap ring, when installing the drilling rod, insert the connection bayonet socket of locating the connecting seat with the one end of drilling rod, then through the connection buckle joint in the connection snap ring of drilling rod to with the drilling rod spacing in the connection bayonet socket of connecting seat, drive the connecting seat through the puncher and stretch out or shrink, drive drilling rod reciprocating motion to punch the operation to the road surface; when the drill rod is disassembled, the connecting buckle is pulled and forced to turn over, so that the connecting buckle is separated from the connecting clamping ring, the drill rod can be taken out, and the disassembly and assembly convenience of the drill rod is improved.
Optionally, the connection snap ring is kept away from the joint groove has been seted up to the lateral wall of connecting seat, the connection buckle is kept away from one side of connecting seat has joint portion, the connection buckle with be equipped with the elastic component between the connecting seat, the elastic component normal state makes joint portion joint in the joint groove.
Through adopting foretell technical scheme, through the setting of joint groove and joint portion, after the one end of drilling rod was inserted and is located the connection bayonet socket, connect the buckle and rotate and force joint portion joint in the joint groove under the effect of elastic component to carry out spacingly to connecting the snap ring, force the drilling rod to keep inserting and locate in the connection bayonet socket.
Optionally, the connection buckle is provided with a plurality of, all the connection buckles are arranged around the axis interval of connection snap ring.
Through adopting foretell technical scheme, through setting up a plurality of connection buckles, improve the connection steadiness between connecting seat and the drilling rod.
Optionally, a sliding seat is slidably installed on the connecting seat, a rotating shaft is arranged on one side of the connecting buckle, the rotating shaft is rotatably installed on the sliding seat, and the connecting buckle is hinged to the sliding seat through the rotating shaft; the sliding seat is provided with a sliding piece for driving the sliding seat to be close to or far away from the drill rod.
Through adopting foretell technical scheme, through the setting of sliding seat and slider, connect the buckle joint after connecting the snap ring, drive the sliding seat through the slider and remove towards one side of keeping away from the drilling rod to taut in connecting the buckle, thereby improve the joint steadiness between connecting the buckle and connecting the snap ring, reduce the in-process of punching, connect the buckle and break away from the possibility of connecting the snap ring.
Optionally, the connecting seat is fixed with a fixing seat, and the fixing seat is located at one side of the sliding seat away from the drill rod; the sliding piece comprises a screw rod and a limit nut, one end of the screw rod is fixed on the sliding seat, the other end of the screw rod penetrates through the fixed seat and is connected with the limit nut, and the limit nut is sleeved on the peripheral wall of the screw rod and is in threaded connection with the screw rod.
Through adopting foretell technical scheme, through the setting of lead screw and stop nut, rotate stop nut, stop nut can order about the lead screw to slide to drive the sliding seat and be close to or keep away from the drill bit, in order to loosen or tighten in the connection buckle.
Optionally, the limit nut is a butterfly nut.
Through adopting foretell technical scheme, through the setting of butterfly nut, the operator can order about the lead screw to slide through rotating butterfly nut, need not with the help of other tools.
Optionally, the lateral wall of fixing base is fixed with the rack, the perisporium of axis of rotation is coaxial to be provided with the gear, the rack with meshing transmission between the gear, when the sliding seat is towards being close to one side of drilling rod removes, the rack with meshing transmission between the gear forces the connection buckle breaks away from in connect the snap ring.
Through adopting foretell technical scheme, through the setting of rack and gear, when dismantling the drilling rod, order about the sliding seat and remove towards one side that is close to the drilling rod, take place the meshing transmission between rack and the gear in the sliding seat removal process to drive the connection buckle and rotate and break away from in connecting the snap ring, and then improve the convenience that the drilling rod was taken out.
Optionally, a drill bit is arranged at one end of the drill rod far away from the connecting seat, and the outer diameter of the drill bit is larger than that of the drill rod.
Through adopting foretell technical scheme, through the setting of drill bit, when punching the operation, the drill bit is used for contacting the road surface and chiseling out the slip casting hole, and the external diameter of drill bit is greater than the external diameter of drilling rod for the in-process of punching reduces the possibility of contact between drilling rod and the slip casting hole inner wall, and then reduces the frictional force between overall structure and the slip casting hole inner wall, improves the smoothness degree of overall structure sliding in the slip casting hole.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the arrangement of the connecting buckle and the connecting clamping ring, when the drill rod is installed, one end of the drill rod is inserted into the connecting bayonet of the connecting seat, and then the drill rod is clamped in the connecting clamping ring of the drill rod through the connecting buckle, so that the drill rod is limited in the connecting bayonet of the connecting seat, and the connecting seat is driven to extend or retract through the puncher to drive the drill rod to reciprocate so as to punch a pavement; when the drill rod is disassembled, the connecting buckle is pulled and forced to turn over, so that the connecting buckle is separated from the connecting clamping ring, the drill rod can be taken out, and the convenience in disassembly and assembly of the drill rod is improved;
2. through the arrangement of the sliding seat and the sliding piece, the connecting buckle is clamped behind the connecting snap ring, and the sliding piece drives the sliding seat to move towards one side far away from the drill rod so as to be tensioned on the connecting buckle, so that the clamping stability between the connecting buckle and the connecting snap ring is improved, and the possibility that the connecting buckle is separated from the connecting snap ring in the punching process is reduced;
3. through the setting of rack and gear, when dismantling the drilling rod, order about the sliding seat and remove towards the one side that is close to the drilling rod, take place the meshing transmission between rack and the gear in the sliding seat removal process to drive the connection buckle and rotate and break away from in the connection snap ring, and then improve the convenience that the drilling rod was taken out.
Drawings
FIG. 1 is a schematic overall structure of embodiment 1;
FIG. 2 is an enlarged view at A in FIG. 1;
fig. 3 is a schematic view showing the structure of a slider according to embodiment 2;
fig. 4 is a partial cross-sectional view showing a rack and pinion in embodiment 3.
Reference numerals illustrate: 1. a puncher; 11. drill armrests; 12. a connection port; 13. an on-off switch; 2. a drill rod; 21. connecting a clamping ring; 211. a clamping groove; 22. a drill bit; 3. a connecting seat; 31. a connection bayonet; 32. a connecting buckle; 321. a clamping part; 322. a rotating shaft; 323. a gear; 33. a sliding seat; 34. a fixing seat; 341. a rack; 35. a mounting block; 36. a mounting bar; 4. a slider; 41. a screw rod; 42. and (5) limiting the nut.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-4.
Example 1:
the embodiment of the application discloses grouting punching equipment.
Referring to fig. 1, a grouting and punching device comprises a punch 1 and a drill rod 2, wherein a drill handrail 11 is arranged at the top of the punch 1, a connecting seat 3 which can extend or retract is slidably arranged at the bottom of the punch 1, a connecting port 12 is arranged on the side wall of the punch 1, the connecting port 12 is used for being connected with an air compressor (not shown in the figure), and the air compressor is used for sucking or blowing air into the punch 1; the puncher 1 is internally provided with a conversion member (the conversion member is used for converting suction force formed by air suction of the air compressor and blowing force formed by blowing into a power source for sliding of the connecting seat 3, and is a common means in the field, and the structure of the conversion member is not described herein and is not shown in the figure); the punch 1 is provided with an on-off switch 13 for opening and closing the punch 1.
Referring to fig. 1 and 2, the connecting seat 3 has a connecting bayonet 31, and the connecting bayonet 31 is located at the bottom wall of the connecting seat 3; one end of the drill rod 2 is inserted into the connecting bayonet 31, the other end of the drill rod 2 is downward extended and provided with a drill bit 22 fixedly, in the embodiment, the drill bit 22 is fixedly arranged on the drill rod 2 in a welding mode, the end face of the drill bit 22 far away from the drill rod 2 is in a bevel shape, and the outer diameter of the drill bit 22 is larger than the outer diameter of the drill rod 2; so designed, the connecting seat 3 is driven to intermittently extend and retract, and the drill rod 2 is driven to reciprocate along the vertical direction so as to force the drill bit 22 to beat the road surface, thereby drilling the road surface into a grouting hole for grouting.
Referring to fig. 1 and 2, a connecting snap ring 21 is fixedly mounted on the outer peripheral wall of one end of the drill rod 2, which is close to the connecting seat 3, a mounting block 35 is fixedly mounted on the peripheral wall of the connecting seat 3, a connecting buckle 32 is hinged to the mounting block 35, the connecting buckle 32 is used for being clamped to the connecting snap ring 21, and the drill rod 2 is detachably mounted on the connecting seat 3 through the connecting buckle 32 and the connecting snap ring 21.
Referring to fig. 1 and 2, specifically, one side of the connecting buckle 32 is hinged to the mounting block 35, one side of the connecting buckle 32 away from the mounting block 35 is provided with a clamping portion 321, a side wall of the connecting snap ring 21 away from the connecting seat 3 is provided with a clamping groove 211, in this embodiment, the clamping groove 211 is annularly arranged around the axis of the drill rod 2, and the clamping portion 321 of the connecting snap ring 21 is clamped in the clamping groove 211; an elastic member is installed between the connecting buckle 32 and the mounting block 35, the elastic member is provided as a torsion spring (not shown in the figure), the torsion spring is installed at the hinge position between the connecting buckle 32 and the mounting block 35, and the clamping portion 321 is clamped in the clamping groove 211 by the torsion spring in a normal state.
The implementation principle of embodiment 1 of the present application is: through the arrangement of the connecting buckle 32 and the connecting clamping ring 21, when the drill rod 2 is installed, the connecting buckle 32 is broken off to enable the connecting buckle 32 to avoid the connecting bayonet 31, then one end of the drill rod 2 far away from the drill bit 22 is inserted into the connecting bayonet 31, and then the connecting buckle 32 is loosened, the connecting buckle 32 rotates under the action of the torsion spring and forces the clamping part 321 to be clamped in the clamping groove 211, so that one end of the drill rod 2 is limited in the connecting bayonet 31; when the drill rod 2 is detached, the drill rod 2 can be detached only by pulling the connecting buckle 32 to force the clamping part 321 to be separated from the clamping groove 211, so that the convenience in detaching the drill rod 2 is improved, and the operation efficiency is further improved.
Example 2:
the embodiment of the application discloses grouting punching equipment.
Referring to fig. 3, an apparatus for grouting and punching disclosed in the embodiment of the present application is different from embodiment 1 in that:
the sliding sleeve on the outer peripheral wall of the connecting seat 3 is provided with a sliding seat 33, in the embodiment, a plurality of mounting blocks 35 are arranged, all the mounting blocks 35 are fixedly mounted on the outer peripheral wall of the sliding seat 33, and all the mounting blocks 35 are arranged at intervals around the axial direction of the drill rod 2; the number of the connecting buckles 32 is set in one-to-one correspondence with the number of the mounting blocks 35, a rotating shaft 322 is fixedly arranged on one side of the connecting buckles 32, the rotating shaft 322 is rotatably arranged on the corresponding mounting block 35, the connecting buckles 32 are hinged to the corresponding mounting block 35 through the rotating shaft 322, and each connecting buckle 32 is hinged to the sliding seat 33 through the rotating shaft 322; by arranging the plurality of connecting buckles 32, the clamping grooves 211 of the connecting clamping rings 21 are clamped by the clamping parts 321 of all the connecting buckles 32, and the connection stability between the connecting seat 3 and the drill rod 2 is further improved.
Referring to fig. 3, a fixing seat 34 is fixedly mounted on the outer peripheral wall of the connecting seat 3, in this embodiment, the fixing seat 34 is located on one side of the sliding seat 33 away from the drill rod 2, a through hole penetrating the fixing seat 34 is formed in the side wall of the fixing seat 34, which is close to the sliding seat 33, and a sliding piece 4 for driving the sliding seat 33 to be close to or away from the drill rod 2 is mounted between the sliding seat 33 and the fixing seat 34.
Referring to fig. 3, the sliding member 4 includes a screw rod 41 and a limit nut 42, one end of the screw rod 41 is fixedly mounted on the side wall of the sliding seat 33 close to the fixing seat 34, and the other end passes through the through hole and is connected to the limit nut 42, in this embodiment, the limit nut 42 is configured as a butterfly nut, and the butterfly nut is sleeved on the peripheral wall of the screw rod 41 and is in threaded connection with the peripheral wall of the screw rod 41.
The implementation principle of embodiment 2 of the present application is: when the drill rod 2 is installed, one end of the drill rod 2 is inserted into the connection bayonet 31, and after all the clamping parts 321 of the connection buckles 32 are clamped in the clamping grooves 211 of the connection clamping rings 21, the butterfly nut is rotated to drive the screw rod 41 to move towards one side close to the fixed seat 34 so as to drive the sliding seat 33 to move towards one side close to the fixed seat 34 and be tensioned on the connection buckles 32, so that the clamping parts 321 of the connection buckles 32 are firmly clamped in the clamping grooves 211 of the connection clamping rings 21, the possibility that the clamping parts 321 are separated from the clamping grooves 211 in the punching operation process is reduced, and the connection stability between the connection seat 3 and the drill rod 2 is improved.
Example 3:
the embodiment of the application discloses grouting punching equipment.
Referring to fig. 4, an apparatus for grouting and punching disclosed in the embodiment of the present application is different from embodiment 2 in that:
in this embodiment, a plurality of mounting bars 36 are fixedly mounted on the peripheral wall of the fixing seat 34, all the mounting bars 36 are arranged at intervals around the central axis of the fixing seat 34, and all the mounting bars 36 are arranged in one-to-one correspondence with all the mounting blocks 35; each mounting bar 36 is provided with a rack 341, and the length direction of the rack 341 is consistent with the length direction of the drill rod 2; the rotation shaft 322 of each connecting buckle 32 is fixedly provided with a gear 323, the gear 323 is coaxially fixed on the peripheral wall of the rotation shaft 322, the racks 341 and the gear 323 are in meshed transmission, and when the sliding seat 33 moves towards the side close to the drill rod 2, the racks 341 and the gears 323 are in meshed transmission, and the connecting buckles 32 are forced to be separated from the connecting clamping rings 21.
The implementation principle of embodiment 3 of the present application is: when the drill rod 2 is disassembled, the sliding seat 33 is driven to move towards one side far away from the fixed seat 34 through the screw rod 41 and the butterfly nut so as to drive the clamping parts 321 of all the connecting buckles 32 to be separated from the clamping grooves 211 of the connecting clamping rings 21, and the rack 341 and the gear 323 are meshed for transmission in the moving process of the sliding seat 33 so as to drive the rotating shaft 322 to rotate, force the connecting buckles 32 to rotate by a certain angle, and all the connecting buckles 32 are in an open state after rotating by a certain angle so as to avoid the connecting clamping rings 21, thereby facilitating an operator to pull the drill rod 2 away from the connecting bayonets 31 and further improving the disassembly and assembly convenience of the drill rod 2.
The foregoing is a preferred embodiment of the present application, and is not intended to limit the scope of the present application in this way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. An apparatus for grouting and perforating, characterized in that: the drilling machine comprises a drilling machine (1) and a drill rod (2), wherein the drilling machine (1) is slidably provided with an extensible or contractible connecting seat (3), and the connecting seat (3) is provided with a connecting bayonet (31); one end of the drill rod (2) is inserted into the connecting bayonet (31), a connecting clamping ring (21) is arranged on the peripheral wall of one end, close to the connecting seat (3), of the drill rod (2), and a connecting clamping buckle (32) used for being clamped in the connecting clamping ring (21) is hinged to the side wall of the connecting seat (3) at the connecting bayonet (31); the drill rod (2) is detachably arranged on the connecting seat (3) through the connecting buckle (32) and the connecting clamping ring (21).
2. A grouting perforating apparatus as claimed in claim 1, wherein: the connecting clamp ring (21) is far away from the side wall of the connecting seat (3) and is provided with a clamping groove (211), one side, far away from the connecting seat (3), of the connecting clamp ring (32) is provided with a clamping part (321), an elastic piece is arranged between the connecting clamp ring (32) and the connecting seat (3), and the elastic piece normally enables the clamping part (321) to be clamped in the clamping groove (211).
3. A grouting perforating apparatus as claimed in claim 1, wherein: the connecting buckles (32) are arranged in a plurality, and all the connecting buckles (32) are distributed around the central axis of the connecting snap ring (21) at intervals.
4. A grouting perforating apparatus as claimed in claim 1, wherein: a sliding seat (33) is slidably arranged on the connecting seat (3), a rotating shaft (322) is arranged on one side of the connecting buckle (32), the rotating shaft (322) is rotatably arranged on the sliding seat (33), and the connecting buckle (32) is hinged to the sliding seat (33) through the rotating shaft (322); the sliding seat (33) is provided with a sliding piece (4) for driving the sliding seat (33) to be close to or far away from the drill rod (2).
5. The grouting perforating apparatus of claim 4, wherein: the connecting seat (3) is fixedly provided with a fixed seat (34), and the fixed seat (34) is positioned on one side of the sliding seat (33) away from the drill rod (2); the sliding piece (4) comprises a screw rod (41) and a limit nut (42), one end of the screw rod (41) is fixed on the sliding seat (33), the other end of the screw rod is arranged on the fixed seat (34) in a penetrating mode and is connected with the limit nut (42), and the limit nut (42) is sleeved on the peripheral wall of the screw rod (41) and is in threaded connection with the screw rod (41).
6. The grouting perforating apparatus as recited in claim 5 wherein: the limit nut (42) is a butterfly nut.
7. The grouting perforating apparatus as recited in claim 5 wherein: the side wall of fixing base (34) is fixed with rack (341), the perisporium coaxial gear (323) that is provided with of axis of rotation (322), rack (341) with meshing transmission between gear (323), when sliding seat (33) are towards being close to one side of drilling rod (2), rack (341) with meshing transmission between gear (323) and compel connect buckle (32) break away from in connect snap ring (21).
8. A grouting perforating apparatus as claimed in claim 1, wherein: one end of the drill rod (2) far away from the connecting seat (3) is provided with a drill bit (22), and the outer diameter of the drill bit (22) is larger than that of the drill rod (2).
CN202321756399.7U 2023-07-05 2023-07-05 Grouting punching equipment Active CN220365535U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321756399.7U CN220365535U (en) 2023-07-05 2023-07-05 Grouting punching equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321756399.7U CN220365535U (en) 2023-07-05 2023-07-05 Grouting punching equipment

Publications (1)

Publication Number Publication Date
CN220365535U true CN220365535U (en) 2024-01-19

Family

ID=89515830

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202321756399.7U Active CN220365535U (en) 2023-07-05 2023-07-05 Grouting punching equipment

Country Status (1)

Country Link
CN (1) CN220365535U (en)

Similar Documents

Publication Publication Date Title
KR20090011109U (en) Apparatus for Bearing Reworking
CN213701879U (en) Door and window section bar positioner for punch press
CN211250034U (en) Mechanical manipulator convenient to disassemble and assemble
CN220365535U (en) Grouting punching equipment
CN110227860A (en) A kind of corrosion nut remover and application method
CN112502155A (en) Water conservancy construction pile head processing method
CN112743334B (en) Jack dismounting device
CN209812203U (en) Tool for disassembling embedded positioning pin
CN212080297U (en) Adjustable electric underground valve opening and closing device
CN219344638U (en) Drilling rod disassembling tool of well reversing drilling machine
CN107321898B (en) Device is demolishd to not hard up hollow rivet of aircraft
CN208992173U (en) A kind of drilling cutting head kerve multifunctional all equipment
CN214773083U (en) Efficient decoration perforating device
CN214303738U (en) Rotary clamping device for disassembling and assembling drill rod
CN221064492U (en) Drilling device
CN214161430U (en) Cutter for parts machining convenient to installation
CN220133924U (en) Sleeve assembly for disassembling drill rod and drill rod disassembling device
CN219767387U (en) Quick-changing tool assembly of machine tool
CN219061572U (en) Steel wire rope pipe feeding device
CN218748614U (en) Drilling device for building engineering technical service
CN117266154A (en) Cast-in-place pile head breaking device and construction method
CN219925922U (en) Valve seat extractor
CN211761247U (en) Extracting tool for hexagonal bolt
CN112847518B (en) Obstacle clearing device for maintenance of power tower
CN218062197U (en) Automatic drilling machine for pebble stratum investigation

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant