Testing tool for long shaft pump

Abstract

The utility model discloses a test tool for a long-shaft pump, which belongs to the technical field of long-shaft pump detection, and comprises a base, a vertical plate I is arranged at one end of the base, a chuck I is fixedly connected to the side wall of the vertical plate I, a cylinder is arranged at the other end of the base, and the output end of the cylinder is fixedly connected with a vertical plate II. A limiting chuck is arranged at the end, close to the first chuck, of the second vertical plate, the outer diameter of the first chuck and the outer diameter of the limiting chuck are both smaller than the inner diameter of the shaft body, balls used for being in rolling connection with the inner wall of the shaft body are arranged on the periphery of the first chuck, and an inner supporting assembly used for movably abutting against the inner wall of the shaft body is arranged on the limiting chuck. According to the scheme, by arranging the inner supporting assembly, the shaft body located at the outer end of the chuck can be limited, the driven block and the abutting block can synchronously and stably extend to the outer end of the chuck to be tightly connected with the inner wall of the shaft body in an abutting mode, and the problem that due to unreasonable diameter design of a traditional chuck, the shaft body cannot rotate synchronously or is difficult to assemble is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of long-shaft pump testing technology, and more specifically, to a testing fixture for long-shaft pumps. Background Technology

[0002] During the operation of long-shaft pumps, the shaft, as a critical component, is subjected to high-speed rotation and complex stress environments for extended periods, making it prone to defects such as wear, deformation, and cracks. These problems not only affect the pump's efficiency, leading to a decrease in performance parameters such as flow rate and head, but in severe cases, they can also cause pump failure, resulting in production interruptions and significant economic losses. Therefore, regular testing and maintenance of the long-shaft pump shaft, and timely detection and handling of potential problems, are crucial for ensuring the stable operation of long-shaft pumps.

[0003] A Chinese utility model patent entitled "Detection Device for Slender Shaft of Submersible Electric Pump" was published in the authorization announcement number CN221628430U. By setting a first vertical plate, a first clamp, a second vertical plate, a second clamp, a first drive assembly, and a cylinder, the slender shaft to be tested can be clamped and fixed in a relatively convenient way, and can be driven to rotate. By setting an L-shaped plate and a second drive assembly, the CCD camera can be driven to move in the horizontal direction, so the slender shaft to be tested can be photographed and compared. This eliminates the need for staff to inspect with the naked eye, thereby greatly improving the testing efficiency.

[0004] The applicant's research revealed significant deficiencies in the design of the second chuck in the aforementioned patented testing device. When the diameter of the second chuck is too small, although the shaft is easily placed at the outer end of the second chuck and the assembly process is relatively convenient, a certain gap inevitably exists between the second chuck and the shaft. When the motor drives the second chuck, this gap prevents the tested shaft from rotating synchronously with the second chuck, resulting in inaccurate testing of the shaft. Conversely, if the diameter of the second chuck is too large, making it close to the diameter of the shaft, assembling the shaft at the outer end of the second chuck becomes extremely difficult, greatly increasing preparation time and operational complexity before testing. These two problems severely restrict the efficiency and accuracy of existing long-shaft pump testing fixtures, urgently requiring a new technical solution. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] To address the problems existing in the prior art, the purpose of this utility model is to provide a test fixture for a long shaft pump. By setting an internal support component, it can limit the shaft located at the outer end of the chuck. The driven block and the abutment block can extend synchronously and stably to the outer end of the chuck and abut tightly against the inner wall of the shaft, which greatly improves the stability of the shaft after clamping and effectively avoids the problem of the shaft not being able to rotate synchronously or the assembly difficulty caused by the unreasonable diameter design of the traditional chuck.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A test fixture for a long-shaft pump includes a base. A vertical plate is mounted on one end of the base, and a chuck is fixedly connected to the side wall of the vertical plate. A cylinder is mounted on the other end of the base, and a second vertical plate is fixedly connected to the output end of the cylinder. A limit chuck is mounted on the end of the second vertical plate near the first chuck. The outer diameters of both the first chuck and the limit chuck are smaller than the inner diameter of the shaft. Ball bearings for rolling contact with the inner wall of the shaft are mounted on the outer periphery of the first chuck. An inner support assembly for movable contact with the inner wall of the shaft is mounted on the limit chuck. A first drive assembly for driving the limit chuck to rotate is mounted on the surface of the second vertical plate. A CCD camera is mounted above the first chuck and the limit chuck, and a connecting plate is fixedly connected to the top of the CCD camera. A second drive assembly for driving the connecting plate to move laterally is also mounted on the base.

[0010] Furthermore, the inner support assembly includes a driving electromagnet disposed at the geometric center of the limiting clamp. The outer periphery of the limiting clamp is provided with a plurality of sliding grooves arranged in a circular array with the geometric center of the limiting clamp as the center. A driven block is slidably connected in the sliding groove. A driven electromagnet is disposed at the end of the driven block near the driving electromagnet and used in conjunction with the driving electromagnet. An abutment block is engaged at the end of the driven block away from the sliding groove. An elastic traction assembly is disposed between the driven block and the inner bottom end of the sliding groove.

[0011] Furthermore, the elastic traction assembly includes an elastic rope and screws located at the front and rear ends of the elastic rope. The inner bottom ends of the driven block and the slide are both provided with threaded grooves, and a pair of screws are threadedly connected to both of them respectively.

[0012] Furthermore, the end of the abutment block away from the driven block is set as an arc surface, and a number of hemispherical protrusions are fixedly connected to the abutment block at this end located on the arc surface.

[0013] Furthermore, the driven block is made of a lightweight material, the abutting block is made of rubber, and the driven block has multiple trapezoidal assembly slots at one end near the abutting block. The abutting block is provided with a locking block that matches the shape of the trapezoidal assembly slots.

[0014] 3. Beneficial effects

[0015] Compared with existing technologies, the advantages of this utility model are:

[0016] (1) This solution can limit the shaft located at the outer end of the chuck by setting an inner support component. The driven block and the abutment block can extend synchronously and stably to the outer end of the chuck and abut against the inner wall of the shaft, which greatly improves the stability of the shaft after clamping and effectively avoids the problem of the shaft not being able to rotate synchronously or the assembly difficulty caused by the unreasonable design of the diameter of the traditional chuck.

[0017] (2) This solution can effectively prevent the driven part from sliding out of the groove when placing the shaft by setting an elastic traction component between the driven part and the bottom of the chuck groove, thus affecting the normal assembly of the shaft. At the same time, by designing a threaded groove and screw detachable solution, the elastic rope can be easily replaced when fatigued, ensuring the continuous and efficient operation of the tooling. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a front sectional view of the clamping part in this utility model;

[0020] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a three-dimensional structural diagram of the clamp in this utility model;

[0022] Figure 5 This is a working condition diagram of the chuck after the shaft body is assembled at the outer end in this utility model.

[0023] Explanation of the labels in the diagram:

[0024] 1. Base; 2. Vertical plate one; 3. Clamp one; 4. Cylinder; 5. Vertical plate two; 6. Limiting clamp; 601. Driving electromagnet; 602. Slide groove; 7. First driving assembly; 8. CCD camera; 9. Connecting plate; 10. Second driving assembly; 11. Driven block; 1101. Driven electromagnet; 1102. Trapezoidal assembly groove; 12. Abutment block; 1201. Hemispherical protrusion; 1202. Locking block; 13. Elastic rope; 14. Screw. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Example 1:

[0029] Please see Figure 1-5A test fixture for a long-shaft pump includes a base 1, with a vertical plate 2 at one end of the base 1. A chuck 3 is fixedly connected to the side wall of the vertical plate 2. A cylinder 4 is mounted at the other end of the base 1, with a vertical plate 2 5 fixedly connected to the output end of the cylinder 4. A limit chuck 6 is mounted on the end of the vertical plate 2 5 near the chuck 3. The outer diameters of both the chuck 3 and the limit chuck 6 are smaller than the inner diameter of the shaft. The outer circumference of the chuck 3 is provided with balls for rolling contact with the inner wall of the shaft, allowing the shaft to slide and roll at the outer end of the chuck 3. This facilitates the assembly of the shaft at the outer end of the chuck 3 or the control of shaft rotation during testing. The limit chuck 6 is provided with... The inner support assembly that moves against the inner wall of the shaft, the surface of the second vertical plate 5 is provided with a first drive assembly 7 for driving the limit clamp 6 to rotate, a CCD camera 8 is provided above the first clamp 3 and the limit clamp 6, the top of the CCD camera 8 is fixedly connected to a connecting plate 9, and the base 1 is also provided with a second drive assembly 10 for driving the connecting plate 9 to move laterally. The second drive assembly 10 can drive the connecting plate 9 and the CCD camera 8 to move laterally, so as to perform all-round shooting comparison and detection on the surface of the slender shaft. The working mode of the first drive assembly 7, the CCD camera 8 and the second drive assembly 10 are consistent with the corresponding parts in the patent cited in the background art.

[0030] Please see Figure 2-5The internal support assembly includes a drive electromagnet 601 located at the geometric center of the limiting clamp 6. Multiple sliding grooves 602 are arranged in a circular array around the geometric center of the limiting clamp 6 on the outer periphery of the limiting clamp 6. A driven block 11 is slidably connected within each sliding groove 602. A driven electromagnet 1101, cooperating with the drive electromagnet 601, is located at the end of the driven block 11 near the drive electromagnet 601. The connection and disconnection between the drive electromagnet 601 and the driven electromagnet 1101 are controlled by an external program. Regarding the relationship between the drive electromagnet 601 and the circumferential... The installation and energization method between the driven electromagnets 1101 are existing technologies known to those skilled in the art and will not be described in detail here. It is worth noting that when the pair of electromagnets are energized, a magnetic repulsion force will be generated between the driving electromagnet 601 and the driven electromagnet 1101. The driven block 11 moves away from the slide groove 602 due to the magnetic repulsion force between the two. The driven block 11 is made of a lightweight material, and the magnetic repulsion force can more easily drive the lightweight driven block 11 to move quickly. The end of the driven block 11 away from the slide groove 602 is engaged with an abutment block 12. 2. Made of rubber, the end of the abutment block 12 away from the driven block 11 is set as an arc surface, which is adapted to the inner diameter of the shaft. Several hemispherical protrusions 1201 are fixedly connected to the end of the abutment block 12 located on the arc surface. After the hemispherical protrusions 1201 made of rubber abut against the inner wall of the shaft, they can provide sufficient friction to make the limit chuck 6 drive the shaft to rotate synchronously when rotating. The driven block 11 is provided with multiple trapezoidal mounting grooves 1102 at the end near the abutment block 12. The abutment block 12 is provided with a groove shaped to match the trapezoidal mounting grooves 1102. The matching locking block 1202, after the hemispherical protrusion 1201 wears or is worn flat during long-term use, the friction between the abutment block 12 and the inner wall of the shaft will decrease. The locking block 1202 on the abutment block 12 can be removed from the trapezoidal assembly groove 1102 for replacement. Since both the trapezoidal assembly groove 1102 and the locking block 1202 are trapezoidal, the rubber locking block 1202 has a certain elastic deformation space during installation, so there is no difficulty in installation and removal, and the stability of the abutment block 12 after assembly can also be guaranteed.

[0031] Please see Figure 3 and Figure 5An elastic traction assembly is provided between the driven block 11 and the inner bottom end of the slide groove 602. The elastic traction assembly includes an elastic rope 13 and screws 14 located at the front and rear ends of the elastic rope 13. When placing the shaft, especially the driven block 11 and the abutment block 12 located below the limit chuck 6, may slide out of the slide groove 602 due to gravity. The elastic rope 13 can provide an inward pulling force to the driven block 11, constraining the driven block 11 within the slide groove 602 and preventing it from sliding out. This ensures that the shaft can be smoothly assembled onto the limit chuck 6, thereby improving the assembly speed. After the shaft assembly is completed, and the drive... When the moving electromagnet is energized, multiple driven blocks 11 will move outward synchronously, causing the abutment block 12 to fit tightly against the inner wall of the shaft. During this process, the elastic rope 13 will be stretched accordingly. Both the driven block 11 and the inner bottom of the slide 602 are provided with threaded grooves, and a pair of screws 14 are threadedly connected to both. When the elastic rope 13 experiences elastic fatigue after long-term use, resulting in a change in the elastic coefficient and affecting the constraint effect on the driven block 11, the driven block 11 that normally falls outside the slide 602 can be pulled outward again. Then, the elastic traction assembly can be removed and replaced using a pair of screws 14.

[0032] Working principle: When using this utility model, the tension provided by the elastic rope 13 constrains each driven block 11 within the slide groove 602. Then, the shaft is first assembled onto the outer ends of the chuck 3 and the limiting chuck 6. At this time, the inner wall of one end of the shaft is in contact with the ball bearing on the chuck 3, while the inner wall of the other end has a certain gap with the limiting chuck 6. The shaft at the outer end of the limiting chuck 6 needs to be limited by the inner support assembly. Then, the driving electromagnet 601 and the driven electromagnet 1101 are energized. After energization... The two generate a magnetic repulsion force, which drives multiple driven blocks 11 and abutment blocks 12 to move synchronously and stably to the outer end of the limiting chuck 6 and make the hemispherical protrusion 1201 tightly abut against the inner wall of the shaft, providing sufficient friction to stably clamp the shaft. This ensures that when the first drive assembly 7 drives the limiting chuck 6 to rotate, the shaft at the outer end of the limiting chuck 6 can rotate synchronously, providing a guarantee for accurate detection of the shaft and effectively avoiding the problem of the shaft not being able to rotate synchronously or assembly difficulties caused by the unreasonable design of the traditional chuck diameter.

[0033] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A test fixture for a long-shaft pump, comprising a base (1), wherein a vertical plate (2) is provided at one end of the base (1), a clamp (3) is fixedly connected to the side wall of the vertical plate (2), and a cylinder (4) is provided at the other end of the base (1), wherein a vertical plate (5) is fixedly connected to the output end of the cylinder (4), characterized in that: The end of the second vertical plate (5) close to the first clamp (3) is provided with a limiting clamp (6), the outer diameters of the first clamp (3) and the limiting clamp (6) are smaller than the inner diameter of the shaft body, the outer periphery of the first clamp (3) is provided with rolling balls for rolling connection with the inner wall of the shaft body, the limiting clamp (6) is provided with an inner support assembly for active abutment with the inner wall of the shaft body, the surface of the second vertical plate (5) is provided with a first driving assembly (7) for driving the limiting clamp (6) to rotate, the upper part between the first clamp (3) and the limiting clamp (6) is provided with a CCD camera (8), the top of the CCD camera (8) is fixedly connected with a connecting plate (9), and the base (1) is also provided with a second driving assembly (10) for driving the connecting plate (9) to move transversely.

2. A test fixture for a long shaft pump as defined in claim 1, wherein: The inner support assembly comprises a driving electromagnet (601) arranged at the geometric center of the limiting clamp (6), a plurality of sliding grooves (602) arranged in a ring array with the geometric center of the limiting clamp (6) as the center are arranged on the outer periphery of the limiting clamp (6), a driven block (11) is slidably connected in the sliding groove (602), a driven electromagnet (1101) matched with the driving electromagnet (601) is arranged at the end of the driven block (11) close to the driving electromagnet (601), an abutting block (12) is clamped at the end of the driven block (11) away from the sliding groove (602), and an elastic traction assembly is arranged between the driven block (11) and the inner bottom end of the sliding groove (602).

3. A test fixture for a long shaft pump as defined in claim 2, wherein: The elastic traction assembly comprises elastic ropes (13) and screws (14) located at the front and rear ends of the elastic ropes (13), and the driven block (11) and the inner bottom end of the sliding groove (602) are both provided with threaded grooves, and a pair of screws (14) are threadedly connected with the driven block (11) and the inner bottom end of the sliding groove (602), respectively.

4. The test fixture for a long shaft pump of claim 2, wherein: The end of the abutting block (12) away from the driven block (11) is provided as an arc surface, and a plurality of semispherical protrusions (1201) are fixedly connected to the end of the abutting block (12) and located on the arc surface.

5. A test fixture for a long shaft pump as defined in claim 2 wherein: The driven block (11) is made of light material, the abutting block (12) is made of rubber material, and a plurality of trapezoidal assembly grooves (1102) are formed in the end of the driven block (11) close to the abutting block (12), and the abutting block (12) is provided with clamping blocks (1202) matched in shape with the trapezoidal assembly grooves (1102).

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