Portable locking nut assembling and disassembling tool for multistage pump
By designing a portable lock nut loading and unloading tool, the lock nut is uniformly distributed by using the pin and lock ring sleeve, which solves the problem of lock nut damage caused by the inability to adjust the hook wrench and hammer knocking, and improves the service life and operation convenience of the lock nut.
Patent Information
- Application Number
- CN202422308338.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-23
AI Technical Summary
The existing hook wrench cannot adjust the range of use, which makes it difficult to install and disassemble the lock nut of the multi-stage centrifugal pump, and the hammer can easily damage the lock nut notch, reducing the service life.
A multi-stage pump portable lock nut loading and unloading tooling is designed, including a handle and a lock ring. The lock ring is equipped with square holes and threaded holes. The pin can be adjusted to adjust the position. The lock nut is snapped through the pin and the lock ring sleeve. The handheld handle can be tightened or removed to avoid hammering.
It realizes uniform torque distribution of lock nuts, reduces wear and improves service life, and can adapt to the loading and unloading of lock nuts of different sizes, simplifying the operation process.
Smart Images
Figure CN223071316U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of loading and unloading tools, in particular to a portable locking nut loading and unloading tool for a multi-stage pump. Background Technique
[0002] As an indispensable common part on a multi-stage pump, during the actual production and assembly of the rotor component of a multi-stage centrifugal pump, the installation and disassembly of the locking nuts at both ends of the rotor component generally use a hook wrench matching the locking nut to load and unload the locking nut.
[0003] In reality, there are various models of multi-stage centrifugal pumps, and the outer diameters of the matching locking nuts also change accordingly. Since the hook wrench is fixed and its use range cannot be adjusted, it is necessary to purchase a hook wrench matching the locking nut to smoothly carry out the loading and unloading. Moreover, the handle of the hook wrench is short, and when installing, locking or disassembling the locking nut, it is often necessary to cooperate with a force-increasing rod or a hammer to meet the torque for locking or disassembling the locking nut. However, due to the impact force, the hammering is likely to damage the notch of the locking nut, greatly reducing the service life of the locking nut. Content of the Utility Model
[0004] The purpose of the utility model is to provide a portable locking nut loading and unloading tool for a multi-stage pump to solve the problems put forward in the above background technique.
[0005] To achieve the above purpose, the utility model provides a portable locking nut loading and unloading tool for a multi-stage pump, which includes a handle and a lock ring fixed at one end of the handle. Two groups of square holes are spaced apart on the side wall of the lock ring, and two groups of threaded holes are spaced apart on the upper end surface of the lock ring. The two groups of threaded holes are respectively perpendicular to the two groups of square holes and communicate with the square holes. A pin is installed in the square hole, and a pin locking screw is arranged in the threaded hole for locking the position of the pin. A lock ring sleeve is sleeved on the inner wall of the lock ring, and a locking nut is arranged in the lock ring sleeve. The pin is selectively clamped with the lock ring sleeve and the locking nut.
[0006] As a further preference, a lock ring sleeve locking screw is installed in the area where the side wall of the lock ring is perpendicular to the handle. The lock ring sleeve locking screw includes a positioning threaded hole opened on the inner wall of the lock ring and a screw matching the positioning threaded hole.
[0007] As a further preference, the two groups of square holes are respectively opened at the side wall positions of 135 degrees and 225 degrees with respect to the handle. Two groups of notches are spaced apart on the upper end surfaces of the lock ring sleeve and the locking nut. The widths of the two groups of notches are equal to the width of the pin and are both arranged at an interval of 90 degrees.
[0008] As a further preference, the outer diameter of the lock ring sleeve is equal to the inner diameter of the lock ring, and the inner diameter of the lock ring sleeve is equal to the outer diameter of the locking nut.
[0009] As a further preference, the outer diameter of the locking nut is 50 - 90 mm.
[0010] As a further preference, two groups of reinforcing ribs are symmetrically and fixedly connected to both sides of the connection area between the handle and the lock ring, and the length of the handle is 1000 - 1200 mm.
[0011] By the above technical solution, a portable locking nut loading and unloading tool for a multi-stage pump provided by the present utility model has the following advantages:
[0012] In the present utility model, by providing a latch pin, a notch corresponding to the position of the latch pin is provided on the edge of the locking nut. During loading and unloading, the latch pin is pushed into the notch along the square hole by loosening the latch pin set screw, the locking nut is clamped, and then the position of the latch pin is locked by the latch pin set screw, completing the clamping of the locking nut and the lock ring. By holding the handle and rotating, the locking nut can be driven to be disassembled or tightened, without the need to additionally use a hammer to provide the loading and unloading power, reducing the damage of the nut caused by external force;
[0013] Moreover, through the provided lock ring sleeve, the inner wall of the lock ring sleeve fits with the outer wall of the locking nut, and the outer wall of the lock ring sleeve fits with the inner wall of the lock ring. By placing the lock ring sleeve in the adjacent area between the outer wall of the locking nut and the inner wall of the lock ring, the locking nut always rotates around the axis during loading and unloading. And the notch provided on the outer wall of the lock ring sleeve, during loading and unloading, the latch pin passes through the notch in sequence to distribute the force at the edge of the locking nut, and the torque received by the locking nut during the loading and unloading process is more uniform, reducing the damage of the force application points of the locking nut during the loading and unloading process. At the same time, only by replacing lock ring sleeves of different sizes can the disassembly of locking nuts of different sizes be realized. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic structural diagram of a portable locking nut loading and unloading tool for a multi-stage pump of the present utility model.
[0015] Figure 2 It is a schematic diagram of the use state of the hook wrench of the present utility model.
[0016] Figure 3 It is a schematic diagram of the use state of the loading and unloading tool of the present utility model.
[0017] In the figure: 1 handle, 2 reinforcing rib, 3 lock ring, 4 lock ring sleeve set screw, 5 latch pin set screw, 6 latch pin, 7 lock ring sleeve, 8 locking nut, 9 hook wrench, 10 device. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0019] A further detailed description of the present invention will be made in conjunction with the accompanying drawings.
[0020] Please refer to Figure 1 - Figure 3 , which is a portable locking nut loading and unloading tool for a multistage pump provided by the present invention, including a handle 1, a lock ring 3, two groups of pins 6 and a lock ring sleeve 7.
[0021] Please refer to Figures 1 to 3 , the handle 1 is fixedly connected to the outer wall of the lock ring 3. On both sides of the connection between the handle 1 and the lock ring 3, two groups of reinforcing ribs 2 are symmetrically and fixedly connected. A lock ring sleeve set screw 4 is installed in the area where the side wall of the lock ring 3 is perpendicular to the handle 1. The two groups of pins 6 are installed at intervals on the side wall of the lock ring 3. The lock ring sleeve 7 is installed inside the lock ring 3. The pin 6 passes through the lock ring sleeve 7 to coaxially lock the locking nut 8 inside the lock ring 3. By rotating the handle 1, the locking nut 8 can be driven to rotate, thereby realizing the loading and unloading of the locking nut 8.
[0022] It should be added that two square holes are provided on the inner wall of the lock ring 3 at positions of 135 degrees and 225 degrees with respect to the handle 1. The square holes communicate with the inner and outer walls of the lock ring 3. The pin 6 is slidably connected in the square hole along the radial direction.
[0023] It should also be added that the lock ring sleeve set screw 4 includes a positioning threaded hole opened on the inner wall of the lock ring 3 and a screw matching the positioning threaded hole. The position where the positioning threaded hole is opened is at 90 degrees with respect to the handle 1. By rotating the screw radially towards the axis, the lock ring sleeve 7 can be fixed on the inner wall of the lock ring 3 to initially fix the position of the lock ring sleeve 7.
[0024] It should be noted that when the outer diameter of the locking nut 8 is 50 - 90 mm and the length of the handle 1 is between 1000 - 1200 mm, the loading and unloading of the locking nut 8 can be realized only by manually applying a moment on the handle 1 without knocking with a hammer.
[0025] Specifically, two threaded holes are spaced apart on the front end face of the lock ring 3. The two groups of threaded holes are respectively perpendicular to the two groups of square holes and communicate with the square holes. Pin set screws 5 are arranged in the threaded holes. By tightening or loosening the pin set screws 5, the pins 6 can be controlled to be fixed or slide in the square holes, thereby adjusting the position of the pins 6 in the square holes.
[0026] It should be added that two sets of notches are spaced apart on one side edge of both the lock ring sleeve 7 and the lock nut 8. The cross-sectional shapes of the two sets of notches are the same as those of the latch pins 6, and the spacing angle is 90 degrees.
[0027] It can be understood that the lock ring sleeve 7 corresponding to the lock nut 8 is selected, and the lock ring sleeve 7 is sleeved in the adjacent area between the lock ring 3 and the lock nut 8. The position of the lock ring sleeve 7 is fixed by screwing the set screw 4 of the lock ring sleeve. The two latch pins 6 are installed in the two square holes on the side wall of the lock ring 3. The length of the radial movement of the latch pins 6 can be adjusted according to the size of the lock nut 8. Rotate the lock ring 3 so that the latch pins 6 pass through the notches on the upper edges of the lock ring sleeve 7 and the lock nut 8 in sequence, and the position of the latch pins 6 is locked by the set screw 5 of the latch pins. Finally, screw the set screw 4 of the lock ring sleeve to further fix the lock ring sleeve 7. When loading and unloading, the tool is sleeved on the outer diameter of the lock nut, and a torque is applied to the handle to complete the installation or disassembly of the lock nut 8.
[0028] Principle: During use, the lock ring sleeve 7 matching the lock nut 8 is installed in the adjacent area between the lock ring 3 and the lock nut 8 to be loaded and unloaded. By controlling the radial movement of the latch pins 6, the latch pins 6 pass through the notches on the upper edges of the lock ring sleeve 7 and the lock nut 8, locking the positions of the lock ring sleeve 7 and the lock nut 8 with the lock ring 3. By applying a torque on the handle 1, the lock nut 8 can be loaded and unloaded. The torque is evenly distributed at the notches of the lock nut 8 through the spaced latch pins 6, reducing the wear of the lock nut 8 during loading and unloading. At the same time, different sizes of lock nuts 8 can be loaded and unloaded by replacing the matching lock ring sleeve 7 before loading and unloading.
[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A portable locking nut loading and unloading tooling for a multistage pump, comprising a handle (1) and a lock ring (3) fixed at one end of the handle (1), characterized in that: Two sets of square holes are spaced apart on the side wall of the lock ring (3), and two sets of threaded holes are spaced apart on the upper end surface of the lock ring (3). The two sets of threaded holes are perpendicular to and communicate with the two sets of square holes respectively. A pin (6) is installed in the square hole, and a pin locking screw (5) is arranged in the threaded hole for locking the position of the pin (6). A lock ring sleeve (7) is sleeved on the inner wall of the lock ring (3), a locking nut (8) is arranged in the lock ring sleeve (7), and the pin (6) is selectively clamped with the lock ring sleeve (7) and the locking nut (8).
2. The portable locking nut loading and unloading tooling for a multi-stage pump according to claim 1, characterized in that: A lock ring sleeve locking screw (4) is installed in the area where the side wall of the lock ring (3) is perpendicular to the handle (1). The lock ring sleeve locking screw (4) includes a positioning threaded hole opened on the inner wall of the lock ring (3) and a screw matching the positioning threaded hole.
3. A portable locking nut loading and unloading tooling for a multi-stage pump according to claim 2, characterized in that: The two sets of square holes are respectively opened at the side wall positions that form an angle of 135 degrees and 225 degrees with the handle (1). Two sets of notches are spaced apart on the upper end surfaces of the lock ring sleeve (7) and the locking nut (8). The widths of the two sets of notches are equal to the width of the pin (6) and are both arranged at an interval of 90 degrees.
4. A portable locking nut loading and unloading tooling for a multi-stage pump according to claim 3, characterized in that: The outer diameter of the lock ring sleeve (7) is equal to the inner diameter of the lock ring (3), and the inner diameter of the lock ring sleeve (7) is equal to the outer diameter of the locking nut (8).
5. A portable locking nut loading and unloading tooling for a multi-stage pump according to claim 4, characterized in that: The outer diameter of the locking nut (8) is 50 - 90 mm.
6. The portable locking nut loading and unloading tooling for a multi-stage pump according to claim 1, characterized in that: Two sets of reinforcing ribs (2) are symmetrically and fixedly connected to both sides of the connection area between the handle (1) and the lock ring (3). The length of the handle (1) is 1000 - 1200 mm.