Single-screw pump stator assembling and disassembling tool

Abstract

The utility model provides a stator dismounting tool for a single-screw pump, relates to the technical field of screw pumps, and solves the problems that the conventional stator dismounting tool wastes time and labor, is easy to block and cannot finish the dismounting work. One end of the metal outer tube is sleeved outside a stator, the stress application lever is radially and detachably inserted at one end, far away from the stator, of the metal outer tube, and a plurality of stator fixing blocks used for clamping the stator are arranged between the inner wall of the metal outer tube and the stator. One end, close to the stator, of the peripheral wall of the metal outer pipe is in radial threaded connection with a plurality of screws used for adjusting the clamping pressure of the stator fixing block. The beneficial effects of the utility model are that the structure is simple, the operation is convenient, the stator fixation is convenient and stable, the replacement and installation work of the stator can be easily realized, the maintenance time and cost of equipment are saved, and financial resources and material resources are saved.

Description

Technical Field

[0001] This utility model relates to the field of screw pump technology, specifically to a tool for disassembling and assembling a single screw pump stator. Background Technology

[0002] A single screw pump consists of a rotor and a stator, which mesh to form a sealed cavity for liquid transport. The stator is composed of an outer steel pipe and an inner rubber sleeve. Because the medium transported by a single screw pump generally contains impurities, the stator is a vulnerable part and requires frequent maintenance and replacement. Replacing the stator typically requires using tools to rotate it, causing axial movement between the stator and rotor, thus separating the stator from the rotor.

[0003] Commonly used tools for disassembling stators include pipe wrenches and chain pliers. However, for stators with large outer diameters, it is usually difficult to find suitable pipe wrenches and chain pliers on the market for disassembling stators. When using pipe wrenches and chain pliers to disassemble stators, they often fail due to improper torque adjustment, which causes slippage of the contact surface. This poses a safety risk to operators who may fall or collide due to inertia after the contact surface slips, and it also affects the appearance. In particular, when replacing a new stator, the paint on the stator surface at the slipped part may peel off.

[0004] Therefore, the drawbacks of both commonly used tools result in time-consuming and labor-intensive disassembly of the single screw pump stator. In particular, for large-sized stators, disassembly is often impossible due to internal material jamming, requiring the equipment to be returned to the factory or outsourced for repair. This seriously affects production plans and significantly increases time and maintenance costs. Utility Model Content

[0005] The purpose of this invention is to solve the problem that existing stator disassembly and assembly tools are time-consuming, labor-intensive, and prone to jamming, making it impossible to complete the disassembly work.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A tool for disassembling and assembling a single screw pump stator is characterized by comprising a metal outer tube with one end sleeved outside the stator, a lever radially detachably inserted into the end of the metal outer tube away from the stator, a plurality of stator fixing blocks for clamping the stator being provided between the inner wall of the metal outer tube and the stator, and a plurality of screws for adjusting the clamping pressure of the stator fixing blocks being radially threaded to the outer peripheral wall of the metal outer tube near the stator.

[0008] A further improvement is that: at least one set of lever holes for inserting force levers is provided on the outer peripheral wall of the end of the metal outer tube away from the stator, and the force levers and lever holes are clearance fit.

[0009] A further improvement is that the lever hole includes a first lever hole and a second lever hole, which are vertically positioned along the diagonal central axis of the metal outer tube, and the force-applying lever passes through the first lever hole to the diagonal second lever hole.

[0010] A further improvement is that the lever holes are provided in two sets, and the two sets of lever holes are equally distributed on the outer metal tube wall.

[0011] A further improvement is that the outer circumferential wall of the metal outer tube has several threaded holes radially opened near the stator end, and several screws are threadedly connected to the threaded holes.

[0012] A further improvement is that a positioning hole is provided on the outer side of the stator fixing block, and the inner diameter of the positioning hole is clearance-fitted with the outer diameter of the screw.

[0013] A further improvement is that: several stator fixing blocks are equally distributed on the outer peripheral wall of the stator, and several screws are correspondingly equally distributed on the outer peripheral wall of the metal outer tube.

[0014] A further improvement is that four stator fixing blocks and four screws are provided correspondingly.

[0015] A further improvement is that the inner surface of the stator fixing block and the contact surface with the stator are arc-shaped sawtooth-shaped.

[0016] A further improvement is that the lever hole and the threaded hole are misaligned and distributed on the outer peripheral wall of the metal outer tube.

[0017] Compared with existing technologies, the above technical solution has the following advantages:

[0018] By using the stator fixing block and screw, the stator can be quickly and securely clamped. By using the lever to rotate the metal outer tube, the stator can be rotated axially, which can easily detach the stator from the rotor or complete the installation of the stator.

[0019] With its simple structure and convenient operation, the stator is easy and stable to fix, making it easy to replace and install the stator, saving equipment maintenance time and costs, and saving financial and material resources. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a front structural diagram of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the metal outer tube in this utility model;

[0024] Figure 4 This is a top view of the metal outer tube in this utility model.

[0025] Figure 5 This is a schematic diagram of the stator fixing block in this utility model;

[0026] Figure 6 This is a structural schematic diagram of the screw positioning stator fixing block in this utility model.

[0027] Explanation of reference numerals in the attached drawings: 1. Metal outer tube; 2. Force lever; 3. Screw; 4. Stator; 5. Stator fixing block; 21. First lever hole; 23. Second lever hole; 31. Threaded hole; 51. Positioning hole. Detailed Implementation

[0028] See Figures 1-6 As shown, the technical solution adopted in this specific embodiment is: a single screw pump stator disassembly and assembly tool, including a metal outer tube 1 with one end sleeved outside the stator 4, a force-applying lever 2 radially detachably inserted into the end of the metal outer tube 1 away from the stator 4, a plurality of stator fixing blocks 5 for clamping the stator 4 are provided between the inner wall of the metal outer tube 1 and the stator 4, and a plurality of screws 3 for adjusting the clamping pressure of the stator fixing blocks 5 are radially threaded to the outer peripheral wall of the metal outer tube 1 near the stator 4.

[0029] The outer peripheral wall of the metal outer tube 1, away from the stator 4, has at least one set of lever holes for inserting the force-applying lever 2. The force-applying lever 2 and the lever holes are in a clearance fit. This clearance fit prevents the force-applying lever from slipping during use.

[0030] The lever hole includes a first lever hole 21 and a second lever hole 23, which are vertically positioned along the diagonal central axis of the metal outer tube 1. The force-applying lever 2 passes through the first lever hole 21 to the diagonal second lever hole 23. The force-applying lever 2 uses the first lever hole 21 as a fulcrum to pry the second lever hole 23, which allows for convenient and quick rotation of the metal outer tube 1.

[0031] The lever holes are provided in two sets, and the two sets of lever holes are equally distributed on the wall of the metal outer tube 1.

[0032] The outer wall of the metal outer tube 1 has a plurality of threaded holes 31 radially opened at one end near the stator 4, and the plurality of screws 3 are threadedly connected to the threaded holes 31.

[0033] The stator fixing block 5 has a positioning hole 51 on its outer side, and the inner diameter of the positioning hole 51 is clearance-fitted with the outer diameter of the screw 3. The screw 3 is connected to the positioning hole 51, allowing for more precise positioning of the stator fixing block 5.

[0034] Several stator fixing blocks 5 are evenly distributed on the outer peripheral wall of the stator 4, and several screws 3 are correspondingly evenly distributed on the outer peripheral wall of the metal outer tube 1. The stator fixing blocks 5 are positioned on the stator 4 in an evenly distributed manner to prevent slippage with the stator 4 in case of uneven force during installation, thereby improving the safety and reliability of operation.

[0035] Among them, four stator fixing blocks 5 and screws 3 are respectively provided.

[0036] The inner surface of the stator fixing block 5 has an arc-shaped sawtooth pattern in contact with the stator 4. This dense tooth structure increases the micro-roughness of the contact surface, enhancing the friction with the stator 4 surface and improving the stability and effectiveness of the stator fixing block 5 in holding the stator 4.

[0037] The lever hole and threaded hole 31 are staggered on the outer peripheral wall of the metal outer tube 1. This staggered arrangement of the lever hole and threaded hole 31 avoids them being positioned on a uniform horizontal line, further improving structural stability and preventing cracking or deformation after repeated use.

[0038] The working principle of this invention is as follows: One end of a metal outer tube with a stator fixing block is fitted over the stator. By rotating a screw, the stroke of the screw is changed, altering the relative position of the stator fixing block and the stator. Once the stator fixing block contacts the stator, torque is applied to increase the pressure between the contact surface of the stator fixing block and the stator, thus fixing the stator. Then, a lever is inserted into a corresponding set of lever holes. The lever uses the first lever hole as a fulcrum to pry open the second lever hole, thereby rotating the metal outer tube. This causes the stator to move axially, allowing it to easily detach from the rotor or complete the stator installation. This invention is applicable to disassembling stators of the same specification. It can be used by simply replacing the stator fixing block according to the stator diameter, eliminating the need for custom-made stator disassembly tools due to size limitations. It offers significant advantages in terms of economy and practicality.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions provided are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents. Any aspects of this utility model not detailed herein are well-known to those skilled in the art.

Claims

1. A single screw pump stator disassembly tool characterized by: It includes a metal outer tube with one end sleeved outside the stator, a force-applying lever radially detachably inserted into the end of the metal outer tube away from the stator, a number of stator fixing blocks for clamping the stator are provided between the inner wall of the metal outer tube and the stator, and a number of screws for adjusting the clamping pressure of the stator fixing blocks are radially threaded to the outer peripheral wall of the metal outer tube near the stator.

2. The single screw pump stator disassembly and assembly tool according to claim 1, characterized in that: The outer peripheral wall of the metal outer tube away from the stator is provided with at least one set of lever holes for inserting the force lever, and the force lever and the lever hole are clearance fit.

3. The single screw pump stator disassembly and assembly tool according to claim 2, characterized in that: The lever hole includes a first lever hole and a second lever hole, which are vertically positioned along the diagonal central axis of the metal outer tube. The force-applying lever passes through the first lever hole to the diagonally opposite second lever hole.

4. The single screw pump stator disassembly and assembly tool according to claim 3, characterized in that: The lever holes are provided in two sets, and the two sets of lever holes are equally distributed on the outer metal tube wall.

5. A single screw pump stator disassembly and assembly tool according to claim 2, characterized in that: The outer circumferential wall of the metal outer tube has a plurality of threaded holes radially opened near the stator end, and a plurality of screws are threadedly connected to the threaded holes.

6. A single screw pump stator disassembly and assembly tool according to claim 5, characterized in that: The stator fixing block has a positioning hole on its outer side, and the inner diameter of the positioning hole is clearance-fitted with the outer diameter of the screw.

7. A single screw pump stator disassembly and assembly tool according to claim 6, characterized in that: Several stator fixing blocks are equally distributed on the outer peripheral wall of the stator, and several screws are equally distributed on the outer peripheral wall of the metal outer tube.

8. A single screw pump stator disassembly and assembly tool according to claim 7, characterized in that: The stator fixing block and the screw are respectively provided in four pieces.

9. A single screw pump stator disassembly and assembly tool according to claim 1, characterized in that: The inner surface of the stator fixing block and the contact surface with the stator are arc-shaped sawtooth.

10. A single screw pump stator disassembly and assembly tool according to claim 5, characterized in that: The lever holes and threaded holes are misaligned and distributed on the outer peripheral wall of the metal outer tube.

Images