Polishing device special for deep hole flow channel of pump body

Abstract

The invention provides a polishing device special for a deep hole runner of a pump body, and relates to the technical field of polishing equipment, the polishing device comprises a polishing part and a flexible shaft, the polishing part comprises a center disc and a plurality of supporting rods, and supporting rollers and polishing rollers are arranged on the two sides of the ends of the supporting rods correspondingly; when the supporting roller and the polishing roller are located in the pump body flow channel, the supporting roller makes contact with the polished part of the pump body flow channel, the area where the supporting roller is located serves as the polishing standard, the polishing roller makes contact with the unpolished part of the pump body flow channel, and when the polishing roller makes contact with local protrusions, the trend of radial displacement is generated. The first included angle is equal to the second included angle, and the supporting roller enables the grinding roller to keep the swing direction synchronous with the grinding reference so as to forcibly restrain radial displacement of the grinding roller, so that the grinding roller can apply continuous and stable active correction force to local protrusions, and the capacity of the grinding roller for effectively correcting the shape precision of the pump body flow channel is guaranteed; therefore, the grinding rigidity is ensured while the method adapts to complex runners.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, and in particular to a special grinding device for deep hole flow channels of pump bodies. Background Technology

[0002] During pump manufacturing, the surface finish of the internal flow channels directly affects the pump's efficiency, energy consumption, and lifespan. Therefore, grinding and deburring the internal flow channels is a crucial post-processing step. Due to the complex internal structure of pumps, especially cast pumps with curved and narrow flow channels, conventional rigid handheld grinding tools often struggle to penetrate deeply and effectively conform to the pump's flow channel walls. Manual grinding by hand with sandpaper or simple clamps is inefficient, inconsistent, and creates blind spots. The core of the flexible shaft grinding machine lies in its use of a flexible shaft drive that can be bent at will. This separates the power source from the front grinding head, allowing the operator to hold a lightweight grinding head and transmit torque through the flexible shaft. This allows for flexible insertion into the pump body and adaptability to different curvatures of the flow channel contours, significantly improving grinding efficiency and adaptability to complex flow channels.

[0003] However, existing flexible shaft grinding machines, due to the flexibility of both their drive shaft and the front grinding head, suffer from insufficient rigidity while adapting to complex flow channels. During operation, the grinding head tends to passively conform to the original contour of the pump body flow channel, making it difficult to apply a continuous and stable active correction force to local protrusions, thus limiting its ability to effectively correct the shape accuracy of the pump body flow channel.

[0004] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] Therefore, it is necessary to provide a special grinding device for deep hole flow channels of pump bodies, addressing the problems existing in current flexible shaft grinding machines.

[0006] The above objectives are achieved through the following technical solutions: A grinding device for deep-hole flow channels in pump bodies includes a grinding section, a driving component, and a flexible shaft. The pump body flow channel has an inlet, through which the grinding section can extend into the flow channel. The driving component and the flexible shaft drive the grinding section to rotate. The grinding section includes a central disk coaxially fixed to the end of the flexible shaft and support rods extending from the inside to the outside relative to the central disk. Multiple support rods are evenly distributed along the circumference of the central disk. Support rollers and grinding rollers are respectively provided on both sides of the end of the support rods. When located in the flow channel of the pump body, the support rollers contact the ground portion of the flow channel, and the grinding rollers contact the unground portion of the flow channel. The axis of the support rollers forms a first angle with the axis of the central disk, and the axis of the grinding rollers forms a second angle with the axis of the central disk. The first angle is equal to the second angle. Both the support rollers and the grinding rollers are hinged to the ends of the support rods and can swing synchronously around their respective hinge points. The support rollers and the grinding rollers have preset positions when swinging. When in the preset positions, both the first angle and the second angle are zero.

[0007] Furthermore, a first gear coaxial with the central disk is rotatably mounted on it, the support rod can slide and extend relative to the central disk, and multiple teeth are evenly distributed along the length of the support rod, which mesh with the first gear. The sum of the weight of the support rod and the teeth is much less than the sum of the weight of the support roller and the grinding roller. Adjacent support rods are staggered along the axial direction of the central disk.

[0008] Furthermore, the center plate is provided with an elastic element, which is used to give the support rod a tendency to retract relative to the center plate.

[0009] Furthermore, the elastic element is a torsion spring and is disposed between the first gear and the central disk.

[0010] Furthermore, the elastic element is a compression spring or a tension spring and is located between the support rod and the central disc.

[0011] Furthermore, two meshing second gears are respectively rotatably located on both sides of the end of the support rod, and fixed rods extend radially from the two second gears. The support roller and the grinding roller are rotatably connected to the two fixed rods respectively.

[0012] Furthermore, the outer contour of the support roller along its axial direction is an arc, while the outer contour of the grinding roller along its axial direction is a straight line.

[0013] Furthermore, the support roller is made of rubber, and the surface of the polishing roller is covered with a scouring pad.

[0014] Furthermore, the flexible shaft end is provided with a clamping cylinder coaxial with it, and the central plate is provided with a rod coaxial with it, which can be inserted into the clamping cylinder; a nut threadedly connected to the clamping cylinder is coaxially sleeved on it, and when the nut rotates, the clamping cylinder clamps or releases the rod.

[0015] Furthermore, a bellows is fitted onto the flexible shaft, and a lubricating medium is filled between the bellows and the flexible shaft.

[0016] The present invention has at least the following beneficial effects: (1) When located in the pump body flow channel, the support roller contacts the polished part of the pump body flow channel, and the area where the support roller is located is used as the polishing reference. The polishing roller contacts the unpolished part of the pump body flow channel. When the polishing roller contacts the local protrusion, it tends to generate radial displacement. Since the support roller and the polishing roller swing synchronously, and the first included angle is equal to the second included angle, the support roller makes the polishing roller keep the swing direction synchronized with the polishing reference, so as to forcibly constrain the radial displacement of the polishing roller, so that the polishing roller can apply a continuous and stable active correction force to the local protrusion, ensuring its ability to effectively correct the shape accuracy of the pump body flow channel, thereby ensuring polishing rigidity while adapting to complex flow channels.

[0017] (2) When the center plate and support rods rotate, centrifugal force is generated. All support rods extend synchronously and with equal extension lengths, so that all support rollers and grinding rollers are thrown out synchronously and come into contact with the pump body flow channel. This ensures that no matter how the diameter of the pump body flow channel changes, the axis of the center plate always coincides with the geometric center of the pump body flow channel, ensuring that the grinding trajectory does not deviate. This reduces the radial runout and vibration of the support rollers and grinding rollers caused by the center plate deviating from the geometric center of the pump body flow channel during high-speed rotation, thereby improving the grinding quality.

[0018] (3) When both the support roller and the grinding roller are in contact with the pump body flow channel, their overall center of gravity is furthest from the axis of the central disk. When the axis of the central disk does not coincide with the tangent of the pump body flow channel, the overall center of gravity of the support roller and the grinding roller is not at the furthest end. Under the action of centrifugal force, the overall center of gravity of the support roller and the grinding roller tends to move away from the center of the central disk. Therefore, the processing posture can be automatically adjusted so that the axis of the central disk does not coincide with the tangent of the pump body flow channel. Thus, there is no need for frequent manual adjustment during the grinding process, reducing the difficulty of operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the special grinding device for deep hole flow channels of pump body provided in an embodiment of the present invention; Figure 2 for Figure 1 The front view; Figure 3 for Figure 1 Schematic diagram of the middle grinding section; Figure 4 for Figure 3 Side view; Figure 5 for Figure 4 Sectional view along axis AA; Figure 6 for Figure 3 The front view; Figure 7 for Figure 6 BB-direction sectional view; Figure 8 for Figure 3 Exploded view of the parts; Figure 9 This is a diagram showing the state when the grinding section is located inside the pump body flow channel; Figure 10 This is a diagram showing the state where the axis of the central disk coincides with the tangent of the straight pump body flow channel; Figure 11 A diagram showing the state where the axis of the central disk does not coincide with the tangent of the straight pump body flow channel; Figure 12 A diagram showing the state where the axis of the central disk coincides with the tangent of the arc-shaped pump body flow channel; Figure 13 This is a diagram showing the state where the axis of the central disk does not coincide with the tangent of the arc-shaped pump body flow channel.

[0020] in: 101. Drive component; 102. Flexible shaft; 103. Pump body; 104. Bellows; 201. Center plate; 202. Support rod; 203. Support roller; 204. Grinding roller; 205. First gear; 206. Tooth; 207. Elastic element; 208. Second gear; 209. Fixing rod; 210. Clamp; 211. Insert rod; 212. Nut. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0022] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They 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 limiting the invention.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] like Figures 1 to 13 As shown, this embodiment of the invention provides a special grinding device for deep-hole flow channels of a pump body, including a grinding section, a driving component 101, and a flexible shaft 102. The flow channel of the pump body 103 has an inlet, and the grinding section can extend into the flow channel of the pump body 103 through the inlet. The driving component 101 and the flexible shaft 102 drive the grinding section to rotate. The grinding section includes a central disk 201 coaxially fixed to the end of the flexible shaft 102 and support rods 202 extending from the inside to the outside relative to the central disk 201. Multiple support rods 202 are evenly distributed along the circumference of the central disk 201. Support rollers 203 and grinding rollers 204 are respectively provided on both sides of the end of the support rods 202. When the pump body 103 flows through the channel, the support roller 203 contacts the polished portion of the pump body 103 channel, and the polishing roller 204 contacts the unpolished portion of the pump body 103 channel. The axis of the support roller 203 forms a first angle with the axis of the central disk 201, and the axis of the polishing roller 204 forms a second angle with the axis of the central disk 201. The first angle is equal to the second angle. Both the support roller 203 and the polishing roller 204 are hinged to the end of the support rod 202 and can swing synchronously around their respective hinge points. The support roller 203 and the polishing roller 204 have preset positions when swinging. When in the preset position, both the first angle and the second angle are zero.

[0025] When located within the flow channel of pump body 103, the support roller 203 contacts the polished portion of the flow channel of pump body 103, using the area where the support roller 203 is located as the polishing reference. The polishing roller 204 contacts the unpolished portion of the flow channel of pump body 103. When the polishing roller 204 contacts a local protrusion, it tends to generate radial displacement. Since the support roller 203 and the polishing roller 204 swing synchronously, and the first included angle is equal to the second included angle, the support roller 203 keeps the polishing roller 204 swinging in a direction synchronized with the polishing reference, thereby forcibly constraining the radial displacement of the polishing roller 204. This allows the polishing roller 204 to apply a continuous and stable active correction force to the local protrusion, ensuring its ability to effectively correct the shape accuracy of the flow channel of pump body 103, thus ensuring polishing rigidity while adapting to complex flow channels.

[0026] The drive component 101 is a power source capable of outputting rotational motion. It is equipped with a power supply and a controller to control start-up, shutdown, and operating conditions. The output end of the drive component 101 is fixed to one end of the flexible shaft 102, and the other end of the flexible shaft 102 is fixed to the central disk 201. The output end of the drive component 101 drives the flexible shaft 102 and the central disk 201 to rotate, thereby causing the support rods 202, support rollers 203, and grinding rollers 204 to rotate synchronously. The specific structure and connection method of the drive component 101 and the flexible shaft 102 are existing technologies and will not be described in detail here. There are at least three support rods 202, preferably four.

[0027] Initially, the first included angle is configured to be equal to the second included angle. Subsequently, the support roller 203 and the grinding roller 204 oscillate synchronously around their respective hinge points, so the first included angle is always equal to the second included angle. Furthermore, the support roller 203 and the grinding roller 204 can swing on both sides of the preset position. In other words, the preset position is an intermediate position. When in the preset position, both the first included angle and the second included angle are zero, that is, the axis of the support roller 203 and the axis of the grinding roller 204 are parallel to the axis of the central disk 201, indicating that the support roller 203 and the grinding roller 204 are in the straight pump body 103 flow channel. On both sides of the preset position, for example, when the support roller 203 and the grinding roller 204 swing to the inside of the preset position, it indicates that the support roller 203 and the grinding roller 204 are on the outside of the arc-shaped pump body 103 flow channel. Similarly, when the support roller 203 and the grinding roller 204 swing to the outside of the preset position, it indicates that the support roller 203 and the grinding roller 204 are on the inside of the arc-shaped pump body 103 flow channel.

[0028] It is worth noting that before inserting the grinding part into the flow channel of the pump body 103 through the inlet, the inlet needs to be initially ground using existing grinding equipment. This ensures that the area near the inlet of the flow channel of the pump body 103 is a ground portion, meeting the grinding requirements of the flow channel of the pump body 103 and serving as a grinding reference. Afterward, the grinding part is inserted into the flow channel of the pump body 103 through the inlet. (See...) Figure 9 The subsequent grinding process begins. The aforementioned existing grinding equipment can be a commercially available grinding machine. Alternatively, the special grinding device for deep-hole flow channels in the pump body described in this application can be used to grind the internal flow channels or deep holes of the pump body 103.

[0029] In one embodiment, see Figure 7 and Figure 8 A first gear 205 coaxial with the central disk 201 is rotatably mounted on it. The support rod 202 can slide and extend relative to the central disk 201. Multiple teeth 206 are evenly distributed along the length of the support rod 202. The teeth 206 mesh with the first gear 205. The sum of the weight of the support rod 202 and the teeth 206 is much smaller than the sum of the weight of the support roller 203 and the grinding roller 204. Adjacent support rods 202 are staggered along the axial direction of the central disk 201.

[0030] When the center disk 201 and support rod 202 rotate, centrifugal force is generated. All support rods 202 extend synchronously and with equal extension lengths, causing all support rollers 203 and grinding rollers 204 to be thrown out synchronously and contact the flow channel of the pump body 103. This ensures that no matter how the diameter of the flow channel of the pump body 103 changes, the axis of the center disk 201 always coincides with the geometric center of the flow channel of the pump body 103, guaranteeing that the grinding trajectory does not deviate. This reduces the radial runout and vibration of the support rollers 203 and grinding rollers 204 caused by the center disk 201 deviating from the geometric center of the flow channel of the pump body 103 during high-speed rotation, thereby improving the grinding quality.

[0031] Furthermore, as the support rod 202 extends, the support roller 203 and the grinding roller 204 gradually move away from the axis of the central disk 201 until they contact the flow channel of the pump body 103. When the axis of the central disk 201 does not coincide with the tangent of the flow channel of the pump body 103, the overall center of gravity of the support roller 203 and the grinding roller 204 is not at the farthest end. Under the action of centrifugal force, the overall center of gravity of the support roller 203 and the grinding roller 204 tends to move away from the center of the central disk 201. Therefore, the processing posture can be automatically adjusted so that the axis of the central disk 201 does not coincide with the tangent of the flow channel of the pump body 103, thereby eliminating the need for frequent manual adjustments during the grinding process and reducing the difficulty of operation.

[0032] For example, such as Figure 10 and Figure 11 The pump body 103 has a linear flow channel. The support roller 203 and the grinding roller 204 are in preset positions with both the first and second included angles being zero. That is, the axes of the support roller 203 and the grinding roller 204 are parallel to the axis of the central disk 201. Figure 10 This is a diagram showing the state where the axis of the central disk 201 coincides with the tangent of the flow channel of the pump body 103. Figure 11 This diagram shows a state where the axis of the central disk 201 does not coincide with the tangent of the flow channel of the pump body 103. (See diagram below.) Figure 12 and Figure 13 The flow channel of the arc-shaped pump body 103 is such that, for the upper support roller 203 and grinding roller 204, they swing to the inner side of a preset position and are located outside the flow channel of the arc-shaped pump body 103; for the lower support roller 203 and grinding roller 204, they swing to the outer side of a preset position and are located inside the flow channel of the arc-shaped pump body 103. Figure 12 This is a diagram showing the state where the axis of the central disk 201 coincides with the tangent of the flow channel of the pump body 103. Figure 13 This is a diagram showing the state where the axis of the central disk 201 does not coincide with the tangent of the flow channel of the pump body 103.

[0033] The support rods 202 and teeth 206 can be made of low-density materials, while the support rollers 203 and grinding rollers 204 can be made of high-density materials. This makes the sum of the weights of the support rods 202 and teeth 206 much smaller than the sum of the weights of the support rollers 203 and grinding rollers 204. Furthermore, when four support rods 202 are provided, adjacent support rods 202 are staggered along the axial direction of the central disk 201, and two opposing support rods 202 are aligned along the axial direction of the central disk 201.

[0034] In one embodiment, the central disk 201 is provided with an elastic element 207, which is used to give the support rod 202 a tendency to retract relative to the central disk 201.

[0035] When the flexible shaft 102 and the central disk 201 are stationary, the elastic element 207 causes the support rod 202 to tend to retract relative to the central disk 201. When the flexible shaft 102 and the central disk 201 rotate, centrifugal force is generated, which overcomes the elastic force of the elastic element 207 and causes the support rod 202 to extend relative to the central disk 201.

[0036] In this embodiment, see Figure 8 The elastic element 207 is a torsion spring and is disposed between the first gear 205 and the central disk 201, and only one elastic element 207 is provided at the first gear 205. In other embodiments not shown, the elastic element 207 is a compression spring or a tension spring and is disposed between the support rod 202 and the central disk 201, and the number of elastic elements 207 is the same as the number of support rods 202.

[0037] In one embodiment, see Figure 8 and Figure 10 On both sides of the end of the support rod 202, there are two meshing second gears 208 that rotate. The two second gears 208 have fixed rods 209 extending radially from them. The support roller 203 and the grinding roller 204 are rotatably connected to the two fixed rods 209 respectively.

[0038] Two meshing second gears 208 enable the support roller 203 and the grinding roller 204 to swing synchronously, thereby keeping the first included angle and the second included angle equal.

[0039] In one embodiment, the outer contour of the support roller 203 along its axial direction is an arc, and the outer contour of the grinding roller 204 along its axial direction is a straight line, so as to ensure stable contact and support between the support roller 203 and the flow channel of the pump body 103, while increasing the grinding range of the grinding roller 204.

[0040] In one embodiment, the support roller 203 is made of rubber, and the surface of the polishing roller 204 is provided with a scouring pad.

[0041] The scouring pad, wrapped around the surface of the grinding roller 204, is suitable for precision grinding of the flow channel of the pump body 103. The scouring pad uses special nylon fibers as the base material, bonded with abrasive minerals (such as silicon carbide and alumina), forming an open three-dimensional mesh structure. It possesses the following characteristics: it can conform to the irregular curved surface of the pump body 103 flow channel for flexible grinding, preventing over-cutting or damage to the workpiece surface; its unique mesh structure facilitates heat dissipation, preventing the pump body 103 from deforming due to overheating during grinding, while its anti-clogging performance ensures a long service life; it has good water and oil resistance, and during grinding, its fibers are continuously worn away, exposing new abrasive minerals, maintaining a relatively stable cutting force and processing effect for a certain period. The specific selection of the scouring pad can be made according to specific grinding requirements and is not limited here.

[0042] In one embodiment, see Figure 5 and Figure 8 The flexible shaft 102 has a clamp 210 coaxial with it at its end, and a rod 211 coaxial with it is provided on the central disk 201. The rod 211 can be inserted into the clamp 210. A nut 212 threadedly connected to the clamp 210 is coaxially sleeved on the clamp 210. When the nut 212 rotates, the clamp 210 clamps or releases the rod 211.

[0043] In one embodiment, a bellows 104 is sleeved on the flexible shaft 102, and a lubricating medium is filled between the bellows 104 and the flexible shaft 102.

[0044] The bellows 104 facilitates handheld grinding operations and protects the flexible shaft 102. At the same time, it lubricates the flexible shaft 102 through a lubricating medium, ensuring the flexibility and durability of the flexible shaft 102 and protecting it.

[0045] The lubricating medium can be a special grease for the flexible shaft 102, which uses synthetic oil as the base oil and lithium soap as the thickener. It provides long-term, excellent lubrication under high loads and frequent movement, reducing friction and wear, extending the service life of the flexible shaft 102, exhibiting excellent oxidation resistance, and being compatible with most rubber and plastic materials. The type and specific composition of the lubricating medium can be selected according to specific lubrication requirements and are not limited here.

[0046] The working principle of this invention is as follows: One end of the flexible shaft 102 is fixed to the output end of the drive member 101. The insertion rod 211 on the center plate 201 is inserted into the clamp 210 at the other end of the flexible shaft 102. The nut 212 is rotated to clamp the insertion rod 211 in the clamp 210, thereby fixing the other end of the flexible shaft 102 to the center plate 201. The inlet is initially polished using an existing polishing device, so that the area near the inlet of the pump body 103 flow channel is the polished part, which meets the polishing requirements of the pump body 103 flow channel and can be used as a polishing reference. Then, the polishing part is inserted into the flow channel of the pump body 103 from the inlet. The output end of the drive member 101 drives the flexible shaft 102 and the center plate 201 to rotate, thereby driving the support rod 202, the support roller 203 and the polishing roller 204 to rotate synchronously, and starting the subsequent polishing process of the pump body 103 flow channel.

[0047] When the center disk 201 and support rod 202 rotate, centrifugal force is generated. All support rods 202 extend synchronously and with equal extension lengths, causing all support rollers 203 and grinding rollers 204 to be thrown out synchronously and contact the flow channel of the pump body 103. This ensures that no matter how the diameter of the flow channel of the pump body 103 changes, the axis of the center disk 201 always coincides with the geometric center of the flow channel of the pump body 103, guaranteeing that the grinding trajectory does not deviate. This reduces the radial runout and vibration of the support rollers 203 and grinding rollers 204 caused by the center disk 201 deviating from the geometric center of the flow channel of the pump body 103 during high-speed rotation, thereby improving the grinding quality. Specifically, when located within the flow channel of the pump body 103, the support roller 203 contacts the polished portion of the flow channel of the pump body 103, using the area where the support roller 203 is located as the polishing reference. The polishing roller 204 contacts the unpolished portion of the flow channel of the pump body 103. When the polishing roller 204 contacts a local protrusion, it tends to generate radial displacement. Since the support roller 203 and the polishing roller 204 swing synchronously, and the first included angle is equal to the second included angle, the support roller 203 keeps the polishing roller 204 swinging in a direction synchronized with the polishing reference, thereby forcibly constraining the radial displacement of the polishing roller 204. This allows the polishing roller 204 to apply a continuous and stable active correction force to the local protrusion, ensuring its ability to effectively correct the shape accuracy of the flow channel of the pump body 103, thus ensuring polishing rigidity while adapting to complex flow channels.

[0048] When the axis of the center disk 201 does not coincide with the tangent of the flow channel of the pump body 103, the overall center of gravity of the support roller 203 and the grinding roller 204 is not at the farthest end. Under the action of centrifugal force, the overall center of gravity of the support roller 203 and the grinding roller 204 tends to move away from the center of the center disk 201. Therefore, the processing posture can be automatically adjusted so that the axis of the center disk 201 does not coincide with the tangent of the flow channel of the pump body 103. Thus, there is no need for frequent manual adjustment during the grinding process, reducing the difficulty of operation.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A special grinding device for deep-hole flow channels of a pump body, comprising a grinding section, a driving component, and a flexible shaft, wherein the pump body flow channel has an inlet, the grinding section can extend into the pump body flow channel through the inlet, and the driving component and the flexible shaft drive the grinding section to rotate, characterized in that, The grinding section includes a central disk coaxially fixed to the end of a flexible shaft and a support rod extending from the inside to the outside relative to the central disk. Multiple support rods are evenly distributed along the circumference of the central disk. Support rollers and grinding rollers are respectively provided on both sides of the end of the support rod. When it is located in the pump body flow channel, the support roller contacts the ground part of the pump body flow channel, and the grinding roller contacts the unground part of the pump body flow channel. The axis of the support roller forms a first angle with the axis of the central disk, and the axis of the grinding roller forms a second angle with the axis of the central disk. The first angle is equal to the second angle. Both the support roller and the grinding roller are hinged to the end of the support rod and can swing synchronously around their respective hinge points. The support roller and the grinding roller have preset positions when swinging. When in the preset position, both the first angle and the second angle are zero.

2. The special grinding device for deep hole flow channels of pump body according to claim 1, characterized in that, A first gear, coaxial with the central disk, is rotatably mounted on the central disk. The support rod can slide and extend relative to the central disk. Multiple teeth are evenly distributed along the length of the support rod, and the teeth mesh with the first gear. The sum of the weight of the support rod and the teeth is much less than the sum of the weight of the support roller and the grinding roller. Adjacent support rods are staggered along the axial direction of the central disk.

3. The special grinding device for deep hole flow channels of pump body according to claim 2, characterized in that, The center plate is equipped with an elastic element, which is used to make the support rod tend to retract relative to the center plate.

4. The special grinding device for deep hole flow channels of pump body according to claim 3, characterized in that, The elastic element is a torsion spring and is located between the first gear and the central disk.

5. The special grinding device for deep hole flow channels of pump body according to claim 3, characterized in that, The elastic element is a compression spring or a tension spring and is located between the support rod and the center plate.

6. The special grinding device for deep hole flow channels of pump body according to claim 1, characterized in that, Two meshing second gears are located on both sides of the end of the support rod. Fixed rods extend radially from the two second gears. The support roller and the grinding roller are rotatably connected to the two fixed rods respectively.

7. The special grinding device for deep hole flow channels of pump body according to claim 1, characterized in that, The outer contour of the support roller along its axial direction is an arc, while the outer contour of the grinding roller along its axial direction is a straight line.

8. The special grinding device for deep hole flow channels of pump body according to claim 1, characterized in that, The support roller is made of rubber, and the surface of the polishing roller is covered with a scouring pad.

9. The special grinding device for deep hole flow channels of pump body according to claim 1, characterized in that, The flexible shaft has a clamping sleeve coaxial with it at its end, and a rod coaxial with it on the central plate. The rod can be inserted into the clamping sleeve. A nut threadedly connected to the clamping sleeve is coaxially sleeved on it. When the nut rotates, the clamping sleeve clamps or releases the rod.

10. The special grinding device for deep hole flow channels of pump body according to claim 1, characterized in that, A bellows is fitted onto the flexible shaft, and a lubricating medium is filled between the bellows and the flexible shaft.

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