A deep hole machining device for a submersible pump housing

Abstract

The application relates to the technical field of inner hole polishing, in particular to a submerged pump shell deep hole machining device. The device comprises an intelligent machine tool, the intelligent machine tool is provided with a fixed pipe, the lower end of the fixed pipe is provided with a mounting cylinder, the mounting cylinder is fixedly connected with two end covers which are symmetrically distributed, the two end covers and the mounting cylinder are jointly fixedly connected with pull ropes which are annularly and equidistantly distributed, the pull ropes are provided with polishing blocks which are equidistantly distributed, the polishing blocks are connected with two support frames which are centrally and symmetrically distributed and are fixedly connected with corresponding pull ropes, and the position close to all the pull ropes in the mounting cylinder is slidably connected with extrusion columns through sliding rods. The limit state of the extrusion columns on the support frames is controlled, then the relative movement of the polishing blocks and the mounting cylinder is controlled, the polishing blocks can be switched between rigid and flexible states, in the process of polishing the cross flow channel in the submerged pump shell, the polishing of the pump shell can be realized without switching the grinding tools, the polishing steps are reduced, and the machining efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of internal hole grinding technology, and in particular to a deep hole machining device for submersible pump casings. Background Technology

[0002] Submersible pump casings typically have complex cast flow channel structures. During machining, these channels require polishing to reduce water flow resistance. However, the presence of "cross-holes" (the intersection of main and side holes) within the casing makes it prone to casting burrs and sharp edges at the intersection. While traditional rigid grinding wheels can ensure efficient and precise machining of straight hole sections, they cannot deform to fit the edges of the cross-holes when entering the cross-hole area, leading to burr residue. If burrs are not completely removed, they will increase the flow resistance of the flow channel and reduce the hydraulic efficiency of the pump. Furthermore, burrs can easily induce cavitation, accelerate the erosion and damage of the flow components, and shorten the service life of the pump. To solve the problem of burrs remaining at the cross holes, the existing method is to use flexible abrasives such as ceramic fiber brushes to further grind the cross holes of the pump casing after the rigid abrasive is ground. The burrs at the cross holes are removed by relying on the deformable characteristics of the flexible abrasives. However, this operation method makes the grinding process of a single pump casing cumbersome and affects the processing efficiency of the pump casing. Summary of the Invention

[0003] This invention provides a deep hole machining device for submersible pump casings, which overcomes the disadvantages of having to switch between rigid and flexible abrasives when grinding pump casings with cross-flow channels, resulting in cumbersome grinding steps and low processing efficiency.

[0004] The technical solution of the present invention is: a deep hole machining device for submersible pump casing, comprising: an intelligent machine tool, wherein the intelligent machine tool is equipped with a fixed tube, and an installation cylinder is provided at the lower end of the fixed tube. The installation cylinder is fixedly connected to two symmetrically distributed end caps, one end cap being fixedly connected to the fixed tube. A ring-shaped, equidistantly distributed pull rope is fixedly connected between the two end caps and the installation cylinder. The pull rope is provided with equidistantly distributed grinding blocks. Each grinding block is engaged with two centrally symmetrically distributed support frames, each fixedly connected to a corresponding pull rope. The support frames are made of elastic metal. The installation cylinder is provided with a number of triangular portions equal to the number of pull ropes. All triangular portions are staggered with all pull ropes. The support frames pass through the installation cylinder and abut against the corresponding triangular portions. A squeezing column is slidably connected to a position near all pull ropes within the installation cylinder via a sliding rod. The squeezing column is used to limit the position of the corresponding support frame. A power module for adjusting the position of the squeezing column is provided within the installation cylinder.

[0005] Furthermore, the power module includes: a transmission rod disposed within the mounting cylinder; all the extrusion columns are hinged to the transmission rod with equally spaced hinge rods; a magnetic column is fixedly connected to the upper end of the transmission rod; the magnetic column slides within the fixed tube; the upper end cap is used to limit the lower limit position of the magnetic column; and an energy storage electromagnetic module is fixedly connected within the fixed tube, the energy storage electromagnetic module being used to control the position of the magnetic column through magnetic force.

[0006] Furthermore, in the direction from the grinding block toward the axis of the mounting cylinder, the distance between the two support frames corresponding to the same grinding block gradually increases.

[0007] Furthermore, the outer side of the extrusion column is wrapped with an elastic cladding, which contacts the corresponding support frame.

[0008] Furthermore, a grinding surface is provided on the side of the grinding block away from the axis of the mounting cylinder, and the projection of the grinding surface on the horizontal plane is an arc, which is used to guide the grinding block to move out of the cross hole.

[0009] Furthermore, an extension is provided on the lower side of the grinding block at the lowest side of the same pull rope, and the horizontal height of the lower side of the extension is lower than the horizontal height of the lower side of the end cap. The length of the grinding block in the vertical direction gradually increases in the direction gradually moving away from the mounting cylinder.

[0010] Furthermore, each of the mounting cylinders near all the pull ropes is hinged with two symmetrically distributed support rods, which are used to support the corresponding pull ropes. A spring is provided between the end cap and all the support rods on the same side.

[0011] Furthermore, the end cap is threadedly connected to an adjusting plate, the adjusting plate is fixedly connected to the corresponding spring, and the adjusting plate is splinedly connected to the transmission rod.

[0012] Furthermore, the end cap is threaded with an adjusting ring, and a tripod is fixed to the side of the adjusting ring near the mounting cylinder. The tripod passes through the corresponding adjusting plate and is used to limit the extreme positions of all the supporting swing arms on the same side.

[0013] Furthermore, a groove is provided at the end of the support swing rod away from the mounting cylinder, and the pull rope slides in the groove corresponding to the support swing rod. The side of the groove of the support swing rod that abuts against the pull rope is arc-shaped to reduce the friction between the pull rope and the support swing rod during relative sliding.

[0014] In summary, this application includes at least one of the following beneficial technical effects: By controlling the limiting state of the extrusion column on the support frame, the present invention controls whether the grinding block and the mounting cylinder can move relative to each other, so that the grinding block can switch between rigid and flexible states. Thus, in the process of grinding the cross flow channels inside the submersible pump casing, the pump casing can be ground without changing the grinding tool, reducing the grinding steps and improving the processing efficiency.

[0015] By adjusting the position of the adjustment plate, the initial compression amplitude of the spring is changed. When the grinding wheel is in a flexible grinding state, the depth of the grinding block probing into the side hole is controlled by the comparison between the elastic force of the spring and the centrifugal force on the grinding block. In this way, the specifications of the grinding block for grinding and chamfering the edges of the cross holes are controlled, and the diameter differences of the side holes of different specifications are adapted.

[0016] By limiting the extreme position of the support rod with a tripod, the bending amplitude of the pull rope that does not correspond to the side hole can be controlled. As the mounting cylinder rotates and the grinding block gradually aligns with the side hole, the movement amplitude of the grinding block during the return period can be reduced, thereby improving the operational stability of the grinding tool in the flexible grinding state. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the fixing tube and mounting cylinder of the present invention; Figure 3 This is a three-dimensional structural diagram of the mounting cylinder and pull rope of the present invention; Figure 4 This is a top view of the three-dimensional structure of the mounting cylinder and grinding block of the present invention; Figure 5 This is a three-dimensional structural diagram of the support frame and elastic cladding of the present invention; Figure 6 This is a three-dimensional structural cross-sectional view of the extrusion column and transmission rod of the present invention; Figure 7 This is a three-dimensional structural diagram of the adjusting ring and tripod of the present invention.

[0018] Among them: 1-Intelligent machine tool, 2-Fixed tube, 3-Mounting cylinder, 4-End cap, 5-Pull rope, 6-Grinding block, 601-Grinding surface, 602-Extension, 7-Support frame, 8-Triangular part, 9-Extrusion column, 10-Transmission rod, 11-Hinged rod, 12-Magnetic column, 13-Energy storage electromagnetic module, 14-Elastic cladding, 15-Support swing arm, 16-Spring, 17-Adjusting plate, 18-Adjusting ring, 19-Tripod. Detailed Implementation

[0019] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0020] Example 1 This embodiment provides a deep hole machining device for submersible pump casings to solve the problem that when grinding pump casings with intersecting flow channels, it is necessary to switch between rigid and flexible grinding tools, which leads to cumbersome grinding steps and low processing efficiency.

[0021] It should be noted that all the parts except for the intelligent machine tool 1 in this article together form the mold, and the cross hole mentioned in this article is composed of vertical hole and side hole.

[0022] See Figures 1 to 5 A deep hole machining device for submersible pump casing includes: an intelligent machine tool 1, which consists of a spindle capable of vertical movement and rotating a cutting tool, and an operating table capable of horizontal movement. The intelligent machine tool 1 is equipped with sensors capable of monitoring the workpiece status. The pump casing to be machined is fixed to the operating table of the intelligent machine tool 1 using a positioning fixture (an existing structure, not shown in the attached drawings). A fixing tube 2 is mounted on the spindle of the intelligent machine tool 1. An installation cylinder 3 is located at the lower end of the fixing tube 2. Two symmetrically distributed end caps 4 are bolted to the installation cylinder 3. The upper end cap 4 is fixed to the fixing tube 2. Nine equally spaced annular pull ropes 5 are jointly fixed between the two end caps 4 and the installation cylinder 3 by compression. The pull ropes 5 are made of steel wire rope, with both ends of the pull ropes being compressed and fixed between the upper end cap 4 and the installation cylinder 3, and between the lower end cap 4 and the installation cylinder 3, respectively. The pull ropes 5 are arranged through nine equally spaced annular pull ropes. Five grinding blocks 6 are distributed, and the vertical length of all grinding blocks 6 corresponding to the same pull rope 5 is greater than the diameter of the side hole of the cross hole of the pump housing to be processed. The grinding blocks 6 are clamped with two support frames 7 that are centrally symmetrically distributed and fixed to the corresponding pull rope 5. The support frames 7 are made of elastic metal. The two support frames 7 are respectively clamped in the grinding blocks 6 by the upper and lower sides of the corresponding grinding blocks 6, so that the two support frames 7 together limit the vertical position of the corresponding grinding blocks 6. The mounting cylinder 3 is provided with a number of triangular portions 8 equal to the number of pull ropes 5. All triangular portions 8 are staggered with all pull ropes 5. The support frames 7 pass through the mounting cylinder 3 and abut against the corresponding triangular portions 8. The mounting cylinder 3 is slidably connected to the squeezing column 9 near all pull ropes 5 by sliding rods, so that the squeezing column 9 slides along the radial direction of the mounting cylinder 3. The squeezing column 9 is used to limit the corresponding support frame 7. The mounting cylinder 3 is provided with a power module for adjusting the position of the squeezing column 9.

[0023] The above settings enable the control of the limiting state of the extrusion column 9 on the support frame 7, thereby controlling whether the grinding block 6 and the mounting cylinder 3 can move relative to each other, so that the grinding block 6 can switch between rigid and flexible states. In this way, the grinding of the pump casing can be achieved without changing the grinding tool during the grinding of the cross flow channel inside the submersible pump casing, reducing the grinding steps and improving the processing efficiency.

[0024] See Figures 3 to 6 The power module includes: a transmission rod 10, which is set inside the mounting cylinder 3 and is coaxial with the mounting cylinder 3; three hinged rods 11, which are equidistantly distributed vertically, are hinged between all the extrusion columns 9 and the transmission rod 10; a magnetic column 12 is fixedly connected to the upper end of the transmission rod 10 and slides inside the fixed tube 2; the upper end cap 4 is used to limit the lower limit position of the magnetic column 12; an energy storage electromagnetic module 13 is fixedly connected inside the fixed tube 2, which is composed of an energy storage battery, a remote control module and an electromagnet, and is used to control the position of the magnetic column 12 by magnetic force.

[0025] The above settings enable the up-and-down movement of the transmission rod 10 via magnetic force to change the radial position of the extrusion column 9 relative to the mounting cylinder 3, thereby changing the limiting state of the extrusion column 9 on the support frame 7. In this way, the rigidity and flexibility of the mold can be switched by remote control, realizing the mold state switching without stopping the machine.

[0026] See Figure 4 In the direction from the grinding block 6 toward the axis of the mounting cylinder 3, the distance between the two support frames 7 corresponding to the same grinding block 6 gradually increases. Thus, when the support frame 7 is in a limited position, the two support frames 7 corresponding to the same grinding block 6 can form a triangular inner structure together with the mounting cylinder 3, which enhances the stability of the grinding tool in the rigid grinding state.

[0027] See Figures 4 to 6 The outer side of the extrusion column 9 is wrapped with an elastic layer 14, which is made of elastic rubber. The elastic layer 14 contacts the corresponding support frame 7. When the extrusion column 9 limits the corresponding support frame 7 through the elastic layer 14, the horizontal height of the hinge rod 11 gradually increases from the inside to the outside of the mounting cylinder 3. At this time, the magnetic column 12 abuts against the upper end cap 4, so that the magnetic column 12 and the transmission rod 10 are in the lower limit position. In this way, the state of the hinge rod 11 eliminates the upward component force applied by the hinge rod 11 to the transmission rod 10 during the grinding process, and enhances the stability of the grinding tool in a rigid state.

[0028] See Figure 5A grinding surface 601 is provided on the side of the grinding block 6 away from the axis of the mounting cylinder 3. The projection of the grinding surface 601 on the horizontal plane is an arc, which is used to guide the grinding block 6 to move out of the cross hole. When the grinding tool is in a flexible state, as the grinding block 6 enters the cross hole of the pump housing and moves, the grinding surface 601 can guide the grinding block 6 to move along its edge as the grinding block 6 approaches the edge of the cross hole of the pump housing, reducing the probability of vibration caused by the collision between the grinding block 6 and the edge of the cross hole, and enhancing the stability of the grinding tool in a flexible state and the grinding effect.

[0029] See Figures 3 to 6 The mounting cylinder 3 is hinged with two symmetrically distributed support rods 15 near all the pull ropes 5. The support rods 15 are used to support the corresponding pull ropes 5. A spring 16 is provided between the end cap 4 and all the support rods 15 on the same side.

[0030] The above setup enables the pull rope 5 to remain taut by supporting the swing arm 15, ensuring that all pull ropes 5, all grinding blocks 6, and all support frames 7 are in the same state when the grinding wheel is not rotating. This maintains the consistency of the state of the grinding wheel after it switches to a rigid state during multiple grinding sessions, thus guaranteeing the consistency of the grinding effect.

[0031] See Figure 5 An extension 602 is provided on the lower side of the lowest grinding block 6 on the same pull rope 5, and the horizontal height of the lower side of the extension 602 is lower than the horizontal height of the lower side of the lower end cap 4. The length of the grinding block 6 in the vertical direction gradually increases in the direction of gradually moving away from the mounting cylinder 3. All grinding blocks 6 on the same pull rope 5 abut against each other on the upper and lower sides away from the mounting cylinder 3. Through the mutual abutment of the grinding blocks 6, the grinding tool in a rigid state disperses the deflection force caused by the centrifugal force of the lowest grinding block 6 to all the support frames 7 corresponding to the same pull rope 5, thereby enhancing the coaxiality of all grinding blocks 6 on the same pull rope 5 in a rigid state, and thus ensuring the grinding effect of the grinding tool in a rigid state.

[0032] See Figure 5 and Figure 6 The end of the support rod 15 away from the mounting cylinder 3 is provided with a groove. The pull rope 5 slides in the groove of the corresponding support rod 15. The side of the groove of the support rod 15 that abuts against the corresponding pull rope 5 is arc-shaped to reduce the friction between the pull rope 5 and the support rod 15 during relative sliding.

[0033] Grinding process of the inner hole of submersible pump casing: The pump casing to be processed is fixed on the operating table of the intelligent machine tool 1, and the fixing tube 2 is fixed to the intelligent machine tool 1. The sensors on the intelligent machine tool 1 monitor the shape and position of the inner hole of the pump casing to be ground and adjust the position of the fixing tube 2 automatically. At the same time, the operator inputs the material of the pump casing to be ground into the intelligent machine tool 1. The intelligent machine tool 1 determines the rotation speed and movement speed of the fixing tube 2 according to the material of the pump casing and continuously monitors the state of the grinding surface of the inner hole of the pump casing during the grinding process, and adjusts the rotation speed and movement speed of the fixing tube 2 accordingly. The energy storage electromagnetic module 13 is started, so that the energy storage electromagnetic module 13 and the magnetic column 12 generate magnetic repulsion force, and the grinding wheel maintains the state shown in the attached figure. The intelligent machine tool 1 is started, and the intelligent machine tool 1 drives the fixing tube 2 to rotate and move. The fixing tube 2 drives all the grinding blocks 6 to rotate circumferentially together through the mounting cylinder 3 and the support frame 7. In this state, the grinding wheel is in a rigid grinding state. The intelligent machine tool 1 controls the fixing tube 2 to perform a compound motion of rotation and spiral rotation in the inner hole of the pump casing to grind the vertical hole of the pump casing.

[0034] When grinding reaches the cross hole of the pump housing, the fixed tube 2 is kept rotating, and the direction of the magnetic field generated by the energy storage electromagnetic module 13 is controlled so that the magnetic repulsion between the energy storage electromagnetic module 13 and the magnetic column 12 is transformed into magnetic attraction. The magnetic column 12 drives the transmission rod 10 to move upward. The transmission rod 10 drives all the extrusion columns 9 to move towards the transmission rod 10 through all the hinge rods 11. The extrusion column 9 causes the elastic cladding 14 to lose contact with the corresponding support frame 7, releasing the limit on the support frame 7. When the magnetic column 12 contacts the energy storage electromagnetic module 13, the magnetic column 12, transmission rod 10 and extrusion column 9 all stop moving. At this point, the grinding wheel switches to a flexible grinding state. Under the control of the intelligent machine tool 1, the fixed tube 2 is kept rotating at the cross hole while reciprocating along the arc.

[0035] During the grinding of the side hole, a portion of the grinding block 6 on the pull rope 5 corresponds to the side hole. This portion of the grinding block 6 moves inward into the side hole under centrifugal force. The grinding block 6 drives the corresponding two support frames 7 to move together and deforms the support frames 7 (the included angle formed by the adjacent sides of the two support frames 7 corresponding to the same grinding block 6 decreases). Simultaneously, the grinding block 6 causes the pull rope 5 to deform, causing the pull rope 5 to bend outward at the position between the corresponding two support swing rods 15. The pull rope 5 pulls the corresponding two support swing rods 15... As the pull rope 5 swings and compresses the two springs 16, due to the deformation of the pull rope 5, part of the grinding block 6 contacts the side wall of the vertical hole of the pump housing, while the rest corresponds to the side hole, i.e., it is in a suspended state. This makes the grinding block 6 in this position tilted under the traction of the pull rope 5. As the grinding block 6 rotates around the mounting cylinder 3, the grinding block 6 in this position grinds the edge of the side hole and chamfers and deburrs the edge of the cross hole; while the other grinding blocks 6 on the pull rope 5 that do not correspond to the side hole slide along the side wall of the vertical hole of the pump housing.

[0036] As the fixed tube 2 rotates, the pull rope 5 drives the grinding block 6 to gradually move out of the side hole. During the process of the grinding block 6 moving out of the side hole, the number of grinding blocks 6 corresponding to the side hole on the pull rope 5 gradually decreases, and the number of grinding blocks 6 in contact with the vertical hole gradually increases. This causes the bending amplitude and range of the middle part of the pull rope 5 to gradually decrease. Thus, when the grinding block 6 moves to the edge of the side hole, the grinding block 6 can gradually move out of the side hole under the guidance of the grinding surface 601 until the edge of the side hole is ground.

[0037] After the pump casing is polished, the pump casing is removed from the operating table of the intelligent machine tool 1, and the fixed tube 2 is stopped. At this time, all the support swing rods 15 swing together and reset under the combined action of the two springs 16, so that the pull rope 5 returns to its original shape. The pull rope 5 drives the polishing block 6 and the support frame 7 on it to reset together. At the same time, the support frame 7 returns to its original shape. At this time, the direction of the magnetic field generated by the energy storage electromagnetic module 13 is readjusted so that the energy storage electromagnetic module 13 and the magnetic column 12 generate magnetic repulsion. The magnetic column 12 drives the transmission rod 10 to move down and reset. The transmission rod 10 drives all the extrusion columns 9 to move away from the transmission rod 10 through the hinge rod 11. The extrusion column 9 drives the elastic cladding 14 to re-abut against the corresponding support frame 7, limiting the support frame 7. During the downward movement of the transmission rod 10, the hinge rod 11 swings from the inclined state to the horizontal state, and then swings back to the reverse inclined state. In this way, the state of the hinge rod 11 is used to realize the self-locking of the position of the transmission rod 10.

[0038] Example 2 This embodiment is a further optimization based on Embodiment 1.

[0039] See Figures 5 to 7 The end cap 4 is threadedly connected to an adjusting plate 17, which is fixedly connected to the corresponding spring 16. The adjusting plate 17 is splinedly connected to the transmission rod 10.

[0040] The above settings enable the adjustment plate 17 to be adjusted, thereby changing the initial compression amplitude of the spring 16. When the grinding wheel is in a flexible grinding state, the depth of the grinding block 6 probing into the side hole is controlled by the comparison between the elastic force of the spring 16 and the centrifugal force on the grinding block 6. This controls the specifications of the grinding block 6 for grinding and chamfering the edges of the cross holes and adapts to the diameter differences of side holes of different specifications.

[0041] As the initial compression of spring 16 increases, the initial elastic force of spring 16 increases. This increases the radial clamping force provided by spring 16 to grinding block 6 through support rod 15 and pull rope 5 when the grinding tool is in a flexible grinding state. Thus, when grinding side holes of the same specification, under the same rotation speed of fixed tube 2, the smaller the initial elastic force of spring 16, the deeper the grinding block 6 penetrates into the side hole, resulting in a larger tilt angle of grinding block 6 in contact with the edge of the cross hole. This allows control over the specifications of the chamfering of the edge of the cross hole.

[0042] Example 3 This embodiment is a further optimization based on embodiment 2.

[0043] See Figure 7 The end cap 4 is threaded with an adjusting ring 18. A tripod 19 is fixed to the side of the adjusting ring 18 near the mounting cylinder 3. The tripod 19 passes through the corresponding adjusting plate 17. The tripod 19 is used to limit the extreme positions of all support swing arms 15 on the same side.

[0044] The above settings can limit the extreme position of the support swing arm 15 by the tripod 19, thereby controlling the bending amplitude of the pull rope 5 that is not corresponding to the side hole. When the grinding block 6 gradually corresponds to the side hole as the mounting cylinder 3 rotates, the movement amplitude of the grinding block 6 during the return period can be reduced, thereby improving the operational stability of the grinding tool in the flexible grinding state.

[0045] When the grinding wheel is in a flexible grinding state, and the grinding block 6 is not aligned with the side hole and not in contact with the vertical hole, all grinding blocks 6 on the same pull rope 5 are affected by centrifugal force, causing the middle part of the pull rope 5 to deform away from the mounting cylinder 3. If the deformation range of the middle part of the pull rope 5 is too large, the distance between the grinding block 6 and the mounting cylinder 3 will be larger. As the grinding block 6 rotates around the mounting cylinder 3, when the grinding block 6 gradually aligns with the side hole, the grinding block 6 will first collide with the side wall of the vertical hole and gradually return to center (returning to center refers to the grinding block 6 relative to the mounting cylinder). 3. Reset), so that the deformation amplitude of the middle part of the pull rope 5 is reduced. Then, until the grinding block 6 corresponds to the side hole, the grinding block 6 will drive the middle part of the pull rope 5 to deform again under the action of centrifugal force. By relying on the tripod 19 to limit the support swing rod 15, the deformation amplitude of the pull rope 5 can be limited. Thus, without affecting the grinding block 6 to grind the edge of the side hole, the deformation amplitude of the pull rope 5 that does not correspond to the side hole is reduced, thereby reducing the movement amplitude of the grinding block 6 during the return period and improving the operational stability of the grinding tool in the flexible grinding state.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A deep hole machining device for submersible pump casing, characterized in that, include: A smart machine tool (1) is equipped with a fixed tube (2). The lower end of the fixed tube (2) is provided with an installation cylinder (3). The installation cylinder (3) is fixedly connected to two symmetrically distributed end caps (4). One end cap (4) is fixedly connected to the fixed tube (2). The two end caps (4) and the installation cylinder (3) are connected together by a ring-shaped pull rope (5) that is evenly distributed. The pull rope (5) is provided with an evenly distributed grinding block (6). The grinding block (6) is snapped with two support frames (7) that are symmetrically distributed in the center and fixedly connected to the corresponding pull rope (5). (7) is made of elastic metal. The mounting cylinder (3) is provided with a number of triangular portions (8) equal to the number of pull ropes (5). All the triangular portions (8) are staggered with all the pull ropes (5). The support frame (7) passes through the mounting cylinder (3) and abuts against the corresponding triangular portion (8). The mounting cylinder (3) is slidably connected to the squeezing column (9) near all the pull ropes (5) by a sliding rod. The squeezing column (9) is used to limit the corresponding support frame (7). The mounting cylinder (3) is provided with a power module for adjusting the position of the squeezing column (9). The power module includes: A transmission rod (10) is installed inside the mounting cylinder (3). All the extrusion columns (9) are hinged to the transmission rod (10) with equidistantly distributed hinge rods (11). A magnetic column (12) is fixedly connected to the upper end of the transmission rod (10). The magnetic column (12) slides inside the fixed tube (2). The upper end cap (4) is used to limit the lower limit position of the magnetic column (12). An energy storage electromagnetic module (13) is fixedly connected inside the fixed tube (2). The energy storage electromagnetic module (13) is used to control the position of the magnetic column (12) by magnetic force.

2. The deep hole machining device for submersible pump casing according to claim 1, characterized in that, In the direction from the grinding block (6) toward the axis of the mounting cylinder (3), the distance between the two support frames (7) corresponding to the same grinding block (6) gradually increases.

3. The deep hole machining device for submersible pump casing according to claim 1, characterized in that, The outer side of the extrusion column (9) is covered with an elastic cladding (14), which is in contact with the corresponding support frame (7).

4. The deep hole machining device for submersible pump casing according to claim 1, characterized in that, The grinding block (6) has a grinding surface (601) on the side away from the axis of the mounting cylinder (3). The projection of the grinding surface (601) on the horizontal plane is an arc, which is used to guide the grinding block (6) to move out of the cross hole.

5. The deep hole machining device for submersible pump casing according to claim 4, characterized in that, An extension (602) is provided on the lower side of the grinding block (6) at the bottom of the same pull rope (5), and the horizontal height of the lower side of the extension (602) is lower than the horizontal height of the lower side of the end cap (4) below. The length of the grinding block (6) in the vertical direction gradually increases in the direction that gradually moves away from the mounting cylinder (3).

6. The deep hole machining device for a submersible pump casing according to claim 5, characterized in that, The mounting cylinder (3) is hinged with two symmetrically distributed support rods (15) near all the pull ropes (5). The support rods (15) are used to support the corresponding pull ropes (5). The end cap (4) and all the support rods (15) on the same side are provided with a spring (16).

7. The deep hole machining device for a submersible pump casing according to claim 6, characterized in that, The end cap (4) is threadedly connected to an adjusting plate (17), the adjusting plate (17) is fixedly connected to the corresponding spring (16), and the adjusting plate (17) is splinedly connected to the transmission rod (10).

8. The deep hole machining device for a submersible pump casing according to claim 7, characterized in that, The end cap (4) is threaded with an adjusting ring (18), and a tripod (19) is fixed to the side of the adjusting ring (18) near the mounting cylinder (3). The tripod (19) passes through the corresponding adjusting plate (17) and is used to limit the extreme positions of all the support rods (15) on the same side.

9. The deep hole machining device for a submersible pump casing according to claim 8, characterized in that, The end of the support swing rod (15) away from the mounting cylinder (3) is provided with a groove. The pull rope (5) slides in the groove corresponding to the support swing rod (15). The side of the groove of the support swing rod (15) that abuts against the pull rope (5) is arc-shaped to reduce the friction between the pull rope (5) and the support swing rod (15) during relative sliding.

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