CN113478431A - Large-scale shielding motor thrust disc nut mounting and locking process - Google Patents
Large-scale shielding motor thrust disc nut mounting and locking process Download PDFInfo
- Publication number
- CN113478431A CN113478431A CN202110828552.1A CN202110828552A CN113478431A CN 113478431 A CN113478431 A CN 113478431A CN 202110828552 A CN202110828552 A CN 202110828552A CN 113478431 A CN113478431 A CN 113478431A
- Authority
- CN
- China
- Prior art keywords
- thrust disc
- locking
- disc nut
- nut
- rotor
- 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.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
- B25B27/143—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same for installing wire thread inserts or tubular threaded inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The invention relates to a large-scale shielding motor thrust disc nut mounting and locking process, which comprises the following steps: a. hoisting and leveling a thrust disc nut; b. cleaning the workpiece and coating an anti-lapping agent; c. installing a locking cup and a thrust disc nut; d. screwing down the thrust disc nut; e. the lock cup is knocked and the thrust disc nut is locked. The invention reduces the installation difficulty of the thrust disc nut, reduces the damage between the thrust disc nut and the rotor thread, solves the locking between the thrust disc nut and the rotor, and avoids the loosening and even falling off of the thrust disc nut in the operation process of the rotor, thereby ensuring the stable operation of the motor rotor.
Description
The technical field is as follows:
the invention relates to a large-scale shielding motor thrust disc nut mounting and locking process.
Background art:
with the wide application of more and more large motors, especially the shielded motors are developed in recent countries, the size of the shielded motors is larger and larger, and the size of the nuts on the rotor is also larger, so that the problems of installation and locking of the large nuts are faced. Thrust disc nut belongs to large-scale nut, to the installation of small-size nut, adopts artifical manual can the mounting nut to adopt general moment spanner and sleeve can install, and along with the grow of nut, some manufacturing enterprises are exploring new technology and install large-scale nut, guarantee large-scale nut's installation quality.
In the past, large nuts are directly hoisted and installed on a rotor by a crane, the whole weight of the large nuts is pressed on the rotor in the installation process, the contact stress between the internal threads of the nuts and the threads of the rotor is too large, and the internal threads and the external threads are easily damaged in the screwing process. Meanwhile, the locking mode of the large nut is usually welding locking or double-nut locking, the nut and the rotor are welded together in the welding locking mode, the nut and the rotor are prevented from moving relatively to achieve the locking purpose, and the locking mode is not beneficial to disassembling the nut subsequently. The double-nut locking is adopted, so that the cost is increased, meanwhile, the nut is easy to loosen when the motor runs for a long time, the locking effect is not ideal, hidden dangers exist, the nut needs to be checked regularly, and the double-nut locking is not suitable for locking the nut at the end part of the shielding motor rotor.
The invention content is as follows:
the invention aims to provide a large-scale shielding motor thrust disc nut mounting and locking process, solves the problems that a thrust disc nut is difficult to hoist and mount, a thread is easy to damage and is difficult to lock, and improves the mounting and locking quality of the thrust disc nut.
The technical scheme of the invention is as follows:
a large-scale canned motor thrust dish nut installation locking technology:
a. hoisting and leveling the thrust disc nut (4): a hoisting tool (3) is installed on the thrust disc nut (4), the thrust disc nut (4) is hoisted by a crane and a spring balancer (1), and when the spring balancer (1) is in a balanced state, the length of a sling chain of the three-jaw sling chain (2) is adjusted to enable the thrust disc nut (4) to be horizontal;
b. cleaning the workpiece and coating an anti-grinding agent: before installation, the upper ends of the thrust disc nut (4) and the rotor (6) are cleaned by alcohol and dust-free cloth, and anti-grinding agents are coated on threads on the thrust disc nut (4) and the rotor (6);
c. installing a locking cup (8) and a thrust disc nut (4): firstly, a locking cup (8) is installed on a thrust disc (9), four clamping grooves (9.1) are formed in the thrust disc (9), four clamping jaws (8.1) are formed in the locking cup (8), the clamping jaws (8.1) of the locking cup (8) are placed in the clamping grooves (9.1) of the thrust disc (9) during installation, then a thrust disc nut (4) is rotated to a rotor (6), at the moment, the thrust disc nut (4) can be easily installed on the rotor (6) due to the balance effect of a spring balancer (1), and a hoisting tool (3) is detached;
d. tightening the thrust disc nut (4): screwing two threaded pins (5.1) into threaded through holes of a tool wrench (5), inserting the threaded pins (5.1) into two radial holes (4.2) of a thrust disc nut (4), installing the tool wrench (5) on the thrust disc nut (4), tightening the thrust disc nut (4) according to required torque by using a torque wrench through a driving direction (5.2) on the tool wrench (5), and knocking the tool wrench (5) by using a nylon hammer to further rotate the thrust disc nut (4) so that the thrust disc nut (4) obtains a rotation amount of 5.0-7.5mm on the outer diameter;
e. knocking the locking cup (8) and locking the thrust disc nut (4): the cylindrical metal rod (7) is placed on the locking cup (8) on the outer side of the locking groove (4.1), the nylon hammer is adopted to knock the cylindrical metal rod (7), and the locking cup (8) is driven into the locking groove (4.1) of the thrust disc nut (4) so as to achieve a locking state. Six locking grooves (4.1) are formed in the thrust disc nut (4), the locking cup (8) can be knocked symmetrically and uniformly, the two groups of locking grooves are knocked, namely, one circle is knocked at six locking positions, and then one circle is knocked.
The invention has the technical effects that:
1. the thrust disc nut belongs to a large nut, a special hoisting tool is needed during installation, the thrust disc nut is leveled to facilitate subsequent installation, a spring balancer is adopted during hoisting and installation, and the situation that the threads are damaged or thread slipping is generated due to overlarge thread contact pressure caused by the fact that the weight of the thrust disc nut falls on the threads when the thrust disc nut is screwed into a rotor is avoided; 2. the anti-grinding agent is coated on the threads of the thrust disc nut and the rotor, so that the threads are prevented from being damaged in the installation process and are convenient to disassemble subsequently; 3. after the thrust disc nut is screwed up by adopting the torque of the torque wrench, the nylon hammer is used for knocking to ensure that the outer diameter of the thrust disc nut obtains a rotation amount of 5.0-7.5mm, which is beneficial to improving the locking quality of the thread; 4. when the locking cup is knocked and locked, the locking cup should be knocked uniformly, and the locking cup is knocked in two groups, namely, one circle is knocked at six locking positions, and then one circle is knocked. Therefore, the deformation stress of the six locking positions is uniform, and the locking quality of the locking cup and the thrust disc nut is facilitated. Finally, the invention solves the problem of hoisting the thrust disc nut, reduces the installation difficulty of the large nut, reduces the damage between the thrust disc nut and the rotor thread, solves the locking between the thrust disc nut and the rotor, and improves the installation and locking quality of the thrust disc nut. The loosening and even falling of the thrust disc nut of the rotor in the operation process are avoided, so that the stable operation of the motor rotor is ensured.
Drawings
FIG. 1 is a schematic view of the lifting of a thrust disc nut
FIG. 2 is a schematic diagram of a thrust disc nut after installation and locking
FIG. 3 is an enlarged cross-sectional view of the locking cup in the locked position
Detailed Description
A large-scale canned motor thrust dish nut installation locking technology, a, hoist and mount, leveling thrust dish nut 4: as shown in fig. 1, a hoisting tool 3 is mounted on a thrust disc nut 4, and the thrust disc nut 4 is hoisted by a crane and a spring balancer 1 until the spring balancer 1 is in a balanced state, wherein the balanced state means that the pulling force generated by the stretching of the spring balancer 1 is equal to the total weight of the hoisting tool 3 and the thrust disc nut 4. At the moment, an operator can easily control the thrust disc nut 4 to vertically move up and down by hands, and when the spring balancer 1 is in a balanced state, the length of the sling chain of the three-jaw sling chain 2 is adjusted to enable the thrust disc nut 4 to be horizontal, so that subsequent installation is facilitated;
b. cleaning the workpiece and coating with publicly sold anti-grinding agent NeolueNO 2: before installation, the upper ends of the thrust disc nut 4 and the rotor 6 are cleaned by alcohol and dust-free cloth, and the threads on the thrust disc nut 4 and the rotor 6 are coated with a grinding-proof agent NeolueNO 2, so that the threads are prevented from being damaged in the installation process;
c. installing the locking cup 8 and the thrust disc nut 4: as shown in fig. 3, firstly, the locking cup 8 is installed on the thrust disc 9, the thrust disc 9 is provided with four clamping grooves 9.1, the locking cup 8 is provided with four clamping jaws 8.1, the clamping jaws 8.1 of the locking cup 8 are ensured to be placed in the clamping grooves 9.1 of the thrust disc 9 during installation, then the thrust disc nut 4 is rotated to the rotor 6, at the moment, the thrust disc nut 4 can be easily installed on the rotor 6 due to the balance effect of the spring balancer 1, and the hoisting tool 3 is removed;
d. tightening the thrust disc nut 4: as shown in fig. 2 and 3, the thrust disc nut 4 has four radial holes 4.2 for mounting the tool wrench 5, two threaded pins 5.1 are screwed into the threaded through holes of the tool wrench 5, the threaded pins 5.1 are inserted into the two radial holes 4.2 of the thrust disc nut 4, the tool wrench 5 is mounted on the thrust disc nut 4, the thrust disc nut 4 is screwed by a torque wrench according to a required torque through a driving method 5.2 on the tool wrench 5, and the tool wrench 5 is knocked by a nylon hammer to further rotate the thrust disc nut 4, so that the thrust disc nut 4 obtains a rotation amount of 5.0-7.5mm on the outer diameter, which is beneficial to improving the locking quality of threads;
e. knocking the locking cup 8 and locking the thrust disc nut 4: as shown in fig. 3, the cylindrical metal rod 7 is placed on the locking cup 8 outside the locking groove 4.1, the nylon hammer is used for knocking the cylindrical metal rod 7, and the locking cup 8 is driven into the locking groove 4.1 of the thrust disc nut 4 so as to achieve a locking state. Six locking grooves 4.1 are formed in the thrust disc nut 4, the locking cup 8 is knocked to be weighed to be evenly knocked, the knocking is divided into two groups, namely, the six locking positions are knocked for one circle, and then the knocking for one circle is carried out, so that the deformation stress of the six locking positions is even, and the locking quality of the locking cup 8 and the locking quality of the thrust disc nut 4 are facilitated.
Claims (2)
1. A large-scale canned motor thrust disc nut installation locking technology includes the following steps:
a. hoisting and leveling the thrust disc nut (4): a hoisting tool (3) is installed on the thrust disc nut (4), the thrust disc nut (4) is hoisted by a crane and a spring balancer (1), and when the spring balancer (1) is in a balanced state, the length of a sling chain of the three-jaw sling chain (2) is adjusted to enable the thrust disc nut (4) to be horizontal;
b. cleaning the workpiece and coating an anti-grinding agent: before installation, the upper ends of the thrust disc nut (4) and the rotor (6) are cleaned by alcohol and dust-free cloth, and anti-grinding agents are coated on threads on the thrust disc nut (4) and the rotor (6);
c. installing a locking cup (8) and a thrust disc nut (4): firstly, a locking cup (8) is installed on a thrust disc (9), a clamping jaw (8.1) of the locking cup (8) is placed in a clamping groove (9.1) of the thrust disc (9) during installation, then a thrust disc nut (4) is rotated to a rotor (6), at the moment, the thrust disc nut (4) can be easily installed on the rotor (6) due to the balance effect of a spring balancer (1), and a hoisting tool (3) is detached;
d. tightening the thrust disc nut (4): screwing two threaded pins (5.1) into threaded through holes of a tool wrench (5), inserting the threaded pins (5.1) into two radial holes (4.2) of a thrust disc nut (4), installing the tool wrench (5) on the thrust disc nut (4), tightening the thrust disc nut (4) according to required torque by using a torque wrench through a driving direction (5.2) on the tool wrench (5), and knocking the tool wrench (5) by using a nylon hammer to further rotate the thrust disc nut (4) so that the thrust disc nut (4) obtains a rotation amount of 5.0-7.5mm on the outer diameter;
e. knocking the locking cup (8) and locking the thrust disc nut (4): the cylindrical metal rod (7) is placed on the locking cup (8) on the outer side of the locking groove (4.1), the nylon hammer is adopted to knock the cylindrical metal rod (7), and the locking cup (8) is driven into the locking groove (4.1) of the thrust disc nut (4) so as to achieve a locking state.
2. The large-scale shielding motor thrust disc nut mounting and locking process as claimed in claim 1, which is characterized in that: in the step c), the thrust disc (9) is provided with four clamping grooves (9.1), the locking cup (8) is provided with four clamping jaws (8.1), and the clamping jaws (8.1) of the locking cup (8) are ensured to be placed in the clamping grooves (9.1) of the thrust disc (9) during installation; in the step e), the thrust disc nut (4) is provided with six locking grooves (4.1), the locking cup (8) is stricken symmetrically and uniformly when being stricken, and the two groups of locking grooves are stricken, namely, the six locking positions are stricken for one circle and then are stricken for one circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110828552.1A CN113478431B (en) | 2021-07-22 | 2021-07-22 | Large-scale shielding motor thrust disc nut mounting and locking process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110828552.1A CN113478431B (en) | 2021-07-22 | 2021-07-22 | Large-scale shielding motor thrust disc nut mounting and locking process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113478431A true CN113478431A (en) | 2021-10-08 |
| CN113478431B CN113478431B (en) | 2022-10-11 |
Family
ID=77942799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110828552.1A Active CN113478431B (en) | 2021-07-22 | 2021-07-22 | Large-scale shielding motor thrust disc nut mounting and locking process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113478431B (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU842254A2 (en) * | 1979-08-06 | 1981-06-30 | Kudryavtsev Vladislav M | Locking cup |
| WO2001017095A1 (en) * | 1999-08-31 | 2001-03-08 | Ebara Corporation | Motor frame and motor using the motor frame and motor pump |
| JP2002188592A (en) * | 2000-12-19 | 2002-07-05 | Toa Kogyo Kk | Bearing extraction jig |
| CN203009361U (en) * | 2012-12-27 | 2013-06-19 | 上海电力修造总厂有限公司 | Locking device of feed water pump thrust disc |
| CN204321570U (en) * | 2014-11-17 | 2015-05-13 | 江门市南洋船舶工程有限公司 | A kind of mounting tool of ship hydraulic nut |
| CN106541363A (en) * | 2015-09-18 | 2017-03-29 | 中航商用航空发动机有限责任公司 | Locking nut is tightened and back off tool |
| CN209190631U (en) * | 2018-09-14 | 2019-08-02 | 中国石油天然气股份有限公司 | Spanner |
| CN110614504A (en) * | 2019-09-27 | 2019-12-27 | 浙江省工业设备安装集团有限公司 | Centering tool and method for steam turbine and generator rotor coupling |
| CN110815132A (en) * | 2019-12-10 | 2020-02-21 | 上海第一机床厂有限公司 | Novel reactor control rod driving mechanism claw assembly and assembling method |
| CN210240118U (en) * | 2019-07-24 | 2020-04-03 | 三门核电有限公司 | Device for dismounting radial bearing at lower part of shielding main pump and fixing rotor |
| CN111112960A (en) * | 2020-01-20 | 2020-05-08 | 三门核电有限公司 | Device and process for replacing locking cup at lower part of large shielding main pump |
| CN111112939A (en) * | 2020-01-20 | 2020-05-08 | 三门核电有限公司 | Rotor support locking device for online maintenance of large-scale shielding main pump and operation process |
| CN210983835U (en) * | 2019-12-13 | 2020-07-10 | 三门核电有限公司 | Simulation device for video inspection of locking component at lower part of shielding main pump |
| CN211388602U (en) * | 2019-12-23 | 2020-09-01 | 三门核电有限公司 | Auxiliary dismounting device for lower stator end cover of shielding main pump |
| CN112160969A (en) * | 2020-10-27 | 2021-01-01 | 哈尔滨电气动力装备有限公司 | Locking structure for rotating round nut in liquid environment |
-
2021
- 2021-07-22 CN CN202110828552.1A patent/CN113478431B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU842254A2 (en) * | 1979-08-06 | 1981-06-30 | Kudryavtsev Vladislav M | Locking cup |
| WO2001017095A1 (en) * | 1999-08-31 | 2001-03-08 | Ebara Corporation | Motor frame and motor using the motor frame and motor pump |
| JP2002188592A (en) * | 2000-12-19 | 2002-07-05 | Toa Kogyo Kk | Bearing extraction jig |
| CN203009361U (en) * | 2012-12-27 | 2013-06-19 | 上海电力修造总厂有限公司 | Locking device of feed water pump thrust disc |
| CN204321570U (en) * | 2014-11-17 | 2015-05-13 | 江门市南洋船舶工程有限公司 | A kind of mounting tool of ship hydraulic nut |
| CN106541363A (en) * | 2015-09-18 | 2017-03-29 | 中航商用航空发动机有限责任公司 | Locking nut is tightened and back off tool |
| CN209190631U (en) * | 2018-09-14 | 2019-08-02 | 中国石油天然气股份有限公司 | Spanner |
| CN210240118U (en) * | 2019-07-24 | 2020-04-03 | 三门核电有限公司 | Device for dismounting radial bearing at lower part of shielding main pump and fixing rotor |
| CN110614504A (en) * | 2019-09-27 | 2019-12-27 | 浙江省工业设备安装集团有限公司 | Centering tool and method for steam turbine and generator rotor coupling |
| CN110815132A (en) * | 2019-12-10 | 2020-02-21 | 上海第一机床厂有限公司 | Novel reactor control rod driving mechanism claw assembly and assembling method |
| CN210983835U (en) * | 2019-12-13 | 2020-07-10 | 三门核电有限公司 | Simulation device for video inspection of locking component at lower part of shielding main pump |
| CN211388602U (en) * | 2019-12-23 | 2020-09-01 | 三门核电有限公司 | Auxiliary dismounting device for lower stator end cover of shielding main pump |
| CN111112960A (en) * | 2020-01-20 | 2020-05-08 | 三门核电有限公司 | Device and process for replacing locking cup at lower part of large shielding main pump |
| CN111112939A (en) * | 2020-01-20 | 2020-05-08 | 三门核电有限公司 | Rotor support locking device for online maintenance of large-scale shielding main pump and operation process |
| CN112160969A (en) * | 2020-10-27 | 2021-01-01 | 哈尔滨电气动力装备有限公司 | Locking structure for rotating round nut in liquid environment |
Non-Patent Citations (3)
| Title |
|---|
| 柏宇星: "《水润滑推力轴承与推力盘综合试验台设计》", 《排灌机械工程学报》 * |
| 蒋学诩，蒋崴著: "《汽车维修机工具典型结构 上》", 31 March 1994 * |
| 魏光林主编: "《高压电器及元件装配工教程》", 31 January 2010 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113478431B (en) | 2022-10-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209007583U (en) | A kind of anti-loosening manipulator clamping device | |
| CN209793621U (en) | Bearing dismounting device | |
| CN108772687B (en) | Rotatable nut cap-recognizing withdrawing device | |
| CN113478431B (en) | Large-scale shielding motor thrust disc nut mounting and locking process | |
| CN104385195A (en) | Frock clamp with drilling pump cross head pin and clamping method thereof | |
| CN204221722U (en) | Power plant is large-scale to be threaded parts mounting auxiliary without guide frame | |
| CN113829292A (en) | Wind generating set main bearing locking nut screwing assembly and using method thereof | |
| CN209988960U (en) | Double-fed motor stator hot jacket tool | |
| CN214923999U (en) | Heat-transfer pipe roller expands instrument head bite remove device | |
| CN210099925U (en) | Lifting tool | |
| CN112372580B (en) | Dismounting device for bearing in hole | |
| CN209872148U (en) | High-efficient wheel hub stone tongs | |
| CN112936182A (en) | Air conduit tightening tool and assembling method | |
| CN220218359U (en) | Pumping unit balance weight nut loosening and unloading device | |
| CN208163517U (en) | A kind of extracting tool of blind hole neck bush | |
| CN212721721U (en) | Be used for weight metrological verification to use portable clamping device | |
| CN213088544U (en) | Spherical bearing dismounting device for turnover shaft assembly | |
| CN218984673U (en) | Crank pin bushing taking-out and mounting device | |
| CN220463736U (en) | Quick dismounting device for sealing ring | |
| CN219359355U (en) | Valve disc stripping off device with adjustable | |
| CN210774683U (en) | Manual clamping device of relief valve off-line calibration stand | |
| CN214578201U (en) | Thread matching structure of special-shaped workpiece | |
| CN216359551U (en) | Bolt threading device | |
| CN111994779B (en) | Hoisting method of compressor disk and hoisting tool for machining | |
| CN207243243U (en) | A kind of stainless steel roll bending lifting tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |