Grinding device facilitating surface grinding of rotating surface of acid-resistant pump impeller

Abstract

The invention relates to the technical field of grinding devices, in particular to a grinding device convenient for acid-resistant pump impeller rotating surface grinding, which comprises a machine body, a grinding bearing assembly is arranged in the machine body, an impeller is ground in the grinding bearing assembly, and an impeller bearing mechanism is mounted on the grinding bearing assembly. When the impeller is polished, the impeller is supported through the impeller bearing mechanism, an impeller positioning assembly is arranged on the impeller bearing mechanism, the impeller is limited through the impeller positioning assembly, so that the impeller is accurately placed on the impeller bearing mechanism, and when the impeller is placed, a rotary carrying plate is located above a polishing bearing cylinder; and at the moment, the multiple impellers only need to be sequentially placed on the rotary carrying plate, then the hydraulic rod pieces are started to drive the impellers to enter the grinding bearing cylinder, meanwhile, automatic fixing of the impellers is achieved, great convenience is achieved, the working efficiency of impeller clamping is greatly improved, and working of workers is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding devices, and particularly to a grinding device for facilitating the surface grinding of the rotating surface of an acid-resistant pump impeller. Background Art

[0002] When an acid-resistant pump impeller is produced, it needs to be ground to ensure the smoothness of its surface, thereby ensuring the production quality of the acid-resistant pump impeller. The blades of the acid-resistant pump impeller are designed in a curved shape. Therefore, when grinding the rotating surface of the impeller, a abrasive flow polishing machine is usually used for grinding. The abrasive flow polishing machine mainly transports the abrasive mixed with the viscous fluid to the area to be polished of the workpiece through a high-pressure pump. The fluid drives the abrasive to interact with the surface of the workpiece, generating micro-cutting and frictional forces, layer by layer removing the microscopic protrusions and burrs on the surface of the material, making the surface smoother. It has a natural profiling ability and can fully fit the curved surface of the impeller for uniform polishing. The abrasive flow polishing machine can grind multiple impellers simultaneously, but it still has certain deficiencies. That is, when grinding the impeller, it needs to be fixed, and at this time, it is necessary to operate the fixture one by one to fix the impeller. The operation is relatively troublesome, and the fixture operation is not convenient enough, and it cannot realize the convenient installation and disassembly of the impeller. Furthermore, when grinding multiple impellers, the clamping efficiency of the impeller is relatively low. Summary of the Invention

[0003] The purpose of the present invention is to provide a grinding device for facilitating the surface grinding of the rotating surface of an acid-resistant pump impeller, so as to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: A grinding device for facilitating the surface grinding of the rotating surface of an acid-resistant pump impeller, including a machine body. A grinding and loading component is arranged inside the machine body, and the impeller is ground inside the grinding and loading component. An impeller loading mechanism is installed on the grinding and loading component, and the impeller is supported by the impeller loading mechanism when grinding the impeller. An impeller positioning component is arranged on the impeller loading mechanism, and the impeller is limited by the impeller positioning component to accurately place it on the impeller loading mechanism. An impeller fixing component is also arranged on the impeller loading mechanism. The impeller is fixed by the impeller fixing component, and when the impeller loading mechanism moves, it drives the impeller fixing component to move.

[0005] Preferably, the grinding and loading component is a grinding and loading cylinder, and the grinding and loading cylinder is fixedly arranged inside the machine body.

[0006] Preferably, a mating rack is fixedly arranged inside the grinding and loading cylinder, and the impeller loading mechanism is driven by the mating rack.

[0007] Preferably, the impeller bearing mechanism includes a hydraulic rod, a grinding bearing ring and a rotating carrier plate, and the hydraulic rod is fixedly connected to the grinding bearing ring.

[0008] Preferably, the hydraulic rod drives the grinding bearing ring to move up and down, and the rotating carrier plate is installed on the grinding bearing ring; When the grinding bearing ring moves up and down, it cooperates with the rack to drive the rotating carrier plate to rotate.

[0009] Preferably, the impeller positioning assembly includes a first limiting plate and a second limiting plate. The first limiting plate is arranged on both sides of the rotating carrier plate to limit the impeller from both sides.

[0010] Preferably, the second limiting plate supports and limits the impeller from the lower side when the rotating carrier plate is in an inclined state.

[0011] Preferably, the impeller fixing assembly includes a driving connecting block, a driving frame and an adapter carrier plate. A relative movement occurs between the driving connecting block and the rotating carrier plate to drive the driving frame to move.

[0012] Preferably, the driving frame drives the adapter carrier plate to move, and the impeller is fixed by the adapter carrier plate.

[0013] Preferably, the adapter carrier plate can drive the first limiting plate to move, so that the first limiting plate is separated from the impeller. The driving frame can also drive the second limiting plate to move, and drive the second limiting plate to press against the impeller.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The structure of the present invention is reasonably arranged and has strong functionality, and has the following advantages: 1. When placing the impeller, the rotating carrier plate is above the grinding bearing cylinder, which is convenient for placing the impeller. At this time, only need to place multiple impellers on the rotating carrier plate in sequence, and then start the hydraulic rod to drive the impeller into the grinding bearing cylinder, and at the same time realize the automatic fixing of the impeller, which can realize the synchronous fixing of multiple impellers, is very convenient, greatly improves the working efficiency of impeller clamping, and facilitates the work of the staff.

[0015] 2. When placing the impeller, the impeller is positioned by the first limiting plate and the second limiting plate to accurately be on the inclined rotating carrier plate. The rotating carrier plate is inclined, so that after the impeller is ground, as the rotating carrier plate moves up, it can be in an inclined state again, which is convenient for the fluid and abrasive accumulated on the impeller and the rotating carrier plate to smoothly flow back into the grinding bearing cylinder. When the rotating carrier plate moves down, it will rotate to a horizontal state, so as to provide good support and fixation for the impeller and ensure the stability of the impeller during the grinding process.

[0016] 3. When the rotating carrier plate moves downward, as it rotates, it will drive the connecting carrier plate to move downward relative to the rotating carrier plate. In this way, the impeller can be preliminarily fixed by the generated negative pressure to ensure its stability during the downward movement. As the rotating carrier plate continues to move downward, the negative pressure increases and enhances the adsorption force on the impeller. At the same time, it will also drive the first limiting plate to move downward relative to the rotating carrier plate, separating from the impeller. At the same time, it will also drive the second limiting plate to move away from the impeller, so that the two no longer contact the impeller, avoiding hindering the grinding of the impeller. And as the second limiting plate moves, it will drive the arc-shaped pressing plate to contact the inner wall of the impeller shaft hole, tightly pressing against the inner wall of the shaft hole, playing an auxiliary role in fixing the impeller and fully ensuring the firmness of the impeller fixation. Brief Description of the Drawings

[0017] Figure 1 It is an assembly schematic diagram of the whole body.

[0018] Figure 2 It is an assembly schematic diagram of the interior of the body.

[0019] Figure 3 It is an assembly schematic diagram of the grinding carrier cylinder.

[0020] Figure 4 It is an assembly schematic diagram of the grinding carrier cylinder and the grinding carrier ring.

[0021] Figure 5 It is an assembly schematic diagram of the grinding carrier ring.

[0022] Figure 6 It is a first perspective schematic diagram of the rotating carrier plate assembly.

[0023] Figure 7 It is a second perspective schematic diagram of the rotating carrier plate assembly.

[0024] Figure 8 It is a first perspective structural schematic diagram of the rotating carrier plate.

[0025] Figure 9 It is a second perspective structural schematic diagram of the rotating carrier plate.

[0026] Figure 10 It is an assembly schematic diagram of the driving connecting block, the driving frame and the connecting carrier plate.

[0027] Figure 11 It is an assembly schematic diagram of the connecting carrier plate and the first limiting plate.

[0028] Figure 12 It is a structural schematic diagram of the second limiting plate.

[0029] In the figure: 1, the body; 2, the hydraulic rod; 3, the grinding bearing cylinder; 31, the support guide hole; 32, the mating rack; 4, the grinding bearing ring; 41, the extension connecting plate; 42, the support guide rod; 43, the mating support; 44, the downward insertion channel; 45, the mounting carrier column; 46, the assembly carrier hole; 5, the rotating carrier plate; 51, the movable channel; 511, the insertion cavity channel; 52, the lower bearing plate; 53, the lower bearing rod; 54, the bearing block; 55, the limiting channel; 56, the mounting carrier rod; 561, the bearing; 562, the gear; 57, the bearing rod; 571, the limiting baffle; 58, the mating carrier cavity; 581, the insertion carrier hole; 59, the inner slot; 591, the support inner rod; 6, the driving connecting block; 61, the mating wheel; 62, the connecting channel; 63, the connecting spring; 64, the first connecting rod; 7, the driving frame; 71, the mating carrier strip; 72, the support channel; 73, the second connecting rod; 8, the connecting carrier plate; 81, the connecting insertion hole; 82, the bearing plate strip; 83, the insertion mating rod; 84, the mating cavity plate; 9, the first limiting plate; 91, the connecting carrier plate; 92, the connecting insertion plate; 101, the second limiting plate; 102, the bearing channel; 103, the lower convex plate; 104, the insertion carrier strip; 105, the arc-shaped pressing plate; 106, the mating spring. Detailed implementation mode

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] The present invention provides a technical solution: As Figure 1 , Figure 2 and Figure 3 shown, a grinding device for facilitating the surface grinding of the rotating surface of an acid-resistant pump impeller includes a body 1. A grinding bearing assembly is arranged inside the body 1, and the impeller is ground inside the grinding bearing assembly. An impeller bearing mechanism is installed on the grinding bearing assembly to support the impeller during grinding. An impeller positioning assembly is arranged on the impeller bearing mechanism to limit the impeller through the impeller positioning assembly so that it is accurately placed on the impeller bearing mechanism. An impeller fixing assembly is also arranged on the impeller bearing mechanism to fix the impeller through the impeller fixing assembly, and when the impeller bearing mechanism moves, it drives the impeller fixing assembly to move.

[0032] As Figure 2 and Figure 4As shown, the grinding carrier assembly is a grinding carrier cylinder 3, which is fixedly arranged inside the machine body 1. A mating rack 32 is fixedly arranged inside the grinding carrier cylinder 3 to drive the impeller carrier mechanism through the mating rack 32. Moreover, a support guide hole 31 is provided in the upper circumference of the grinding carrier cylinder 3.

[0033] As Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, the impeller carrier mechanism includes a hydraulic rod 2, a grinding carrier ring 4 and a rotating carrier plate 5. The hydraulic rod 2 is fixedly connected to the grinding carrier ring 4. The hydraulic rod 2 drives the grinding carrier ring 4 to move up and down. The rotating carrier plate 5 is installed on the grinding carrier ring 4. When the grinding carrier ring 4 moves up and down, the mating rack 32 drives the rotating carrier plate 5 to rotate. The hydraulic rod 2 is fixedly installed inside the machine body 1. An extension connecting plate 41 is fixedly arranged on the grinding carrier ring 4, and the extension connecting plate 41 is fixedly connected to the hydraulic rod 2.

[0034] As Figure 4 shown, support guide rods 42 are fixedly arranged on the upper circumference of the grinding carrier ring 4. The support guide rods 42 are inserted into the support guide holes 31. The cooperation between the support guide rods 42 and the support guide holes 31 realizes the limit of the grinding carrier ring 4. A mating support 43 is also fixedly arranged on the circumference of the grinding carrier ring 4. A lower insertion channel 44 is provided in the mating support 43. Moreover, mounting carrier columns 45 are symmetrically fixedly arranged on the mating support 43, and mounting holes 46 are provided in the mounting carrier columns 45.

[0035] As Figure 3 , Figure 8 and Figure 9 shown, an activity channel 51 is provided on the rotating carrier plate 5. Plugging cavities 511 are symmetrically arranged on both sides of the activity channel 51. Moreover, a lower bearing plate 52 is fixedly arranged at the lower port of the activity channel 51. A lower carrier rod 53 is fixedly arranged on the lower bearing plate 52. A bearing block 54 is fixedly arranged at one end of the rotating carrier plate 5. A mounting carrier rod 56 is fixedly arranged on the bearing block 54. A bearing 561 is sleeved on the mounting carrier rod 56, and the bearing 561 is installed in the mounting hole 46. Moreover, a gear 562 is also fixedly arranged on the mounting carrier rod 56, and the gear 562 meshes with the mating rack 32. A limit channel 55 is provided in the bearing block 54. Bearing rods 57 are symmetrically fixedly arranged on the rotating carrier plate 5. Limit baffles 571 are fixedly arranged on the bearing rods 57. Moreover, a mating cavity 58 is also provided in the circumference of the rotating carrier plate 5. Plugging holes 581 are provided on the bottom surface of the mating cavity 58. Inner slots 59 are provided in the lower end surface of the rotating carrier plate 5, and support inner rods 591 are fixedly arranged in the inner slots 59.

[0036] As Figure 6 , Figure 11 and Figure 12As shown, the impeller positioning assembly includes a first limiting plate 9 and a second limiting plate 101. The second limiting plate 101 is arranged on both sides of the rotating carrier plate 5 to limit the impeller from both sides. The first limiting plate 9 supports and limits the impeller from its lower side when the rotating carrier plate 5 is in an inclined state. The first limiting plate 9 is inserted into the limiting channel 55, and a connecting carrier plate 91 is fixedly arranged at the lower end of the first limiting plate 9. An abutting insertion plate 92 is fixedly arranged on the connecting carrier plate 91. A bearing channel 102 is formed on the second limiting plate 101. A bearing rod 57 is inserted into the bearing channel 102, and a matching spring 106 is sleeved on the bearing rod 57. Both ends of the matching spring 106 are respectively fixed on the second limiting plate 101 and the limiting baffle 571. Lower convex plates 103 are symmetrically and fixedly arranged at the lower end of the second limiting plate 101. Insertion carrier strips 104 are also symmetrically and fixedly arranged on the second limiting plate 101. The insertion carrier strips 104 are inserted into the insertion cavity 511, and an arc-shaped pressing plate 105 is fixedly arranged on the insertion carrier strips 104. The arc-shaped pressing plate 105 is located in the moving channel 51 and partially protrudes above the moving channel 51.

[0037] As Figure 6 , Figure 7 and Figure 10 shown, the impeller fixing assembly includes a driving connecting block 6, a driving frame 7 and an abutting carrier plate 8. Relative movement occurs between the driving connecting block 6 and the rotating carrier plate 5 to drive the driving frame 7 to move. The driving frame 7 drives the abutting carrier plate 8 to move, and the impeller is fixed by the abutting carrier plate 8. Matching wheels 61 are fixedly arranged at the upper and lower ends of the driving connecting block 6. The matching wheels 61 are in contact with the matching support 43. A connecting channel 62 is formed on the driving connecting block 6. A lower bearing rod 53 is inserted into the connecting channel 62. A connecting spring 63 is sleeved on the lower bearing rod 53. Both ends of the connecting spring 63 are respectively fixed on the lower bearing plate 52 and the driving connecting block 6.

[0038] A first connecting rod 64 is hinged on the driving connecting block 6. The upper end of the first connecting rod 64 is hinged to the driving frame 7. Matching carrier strips 71 are symmetrically and fixedly arranged at the upper end of the driving frame 7. The matching carrier strips 71 are inserted into the inner insertion slot 59. A supporting channel 72 is formed in the matching carrier strips 71. A supporting inner rod 591 is inserted into the supporting channel 72. A second connecting rod 73 is also hinged on the driving frame 7. The lower end of the second connecting rod 73 is hinged to the abutting carrier plate 8. An abutting insertion hole 81 is formed in the abutting carrier plate 8. A bearing plate strip 82 is fixedly arranged on the abutting carrier plate 8. An insertion matching rod 83 is fixedly arranged on the bearing plate strip 82. The insertion matching rod 83 passes through the insertion hole 581 and is inserted into the matching cavity 58. A matching cavity plate 84 is fixedly arranged at the upper end of the insertion matching rod 83. The matching cavity plate 84 is inserted into the matching cavity 58.

[0039] As Figure 7 and Figure 11As shown, the connecting carrier plate 8 can drive the first limiting plate 9 to move, so that the first limiting plate 9 is separated from the impeller. The connecting plug plate 92 on the first limiting plate 9 is inserted into the connecting jack 81 on the connecting carrier plate 8. The driving frame 7 can also drive the second limiting plate 101 to move, and drive the second limiting plate 101 to press against the impeller. When the driving frame 7 moves, as the driving frame 7 moves, the matching carrier strip 71 on the driving frame 7 will protrude from the inner slot 59 and contact the lower convex plate 103, thereby pushing the second limiting plate 101 to move.

[0040] When grinding the impeller, the impeller is placed on the rotating carrier plate 5. When placing it, the rotating carrier plate 5 is on the upper side of the grinding bearing cylinder 3, and at this time, the rotating carrier plate 5 is in an inclined state. When the impeller is placed on the rotating carrier plate 5, the second limiting plate 101 limits it from both sides of the impeller, and at the same time, the first limiting plate 9 supports and limits the impeller from the lower side of the impeller, that is, at this time, the first limiting plate 9 is in contact with the circumferential surface of the impeller to prevent it from sliding up and down on the rotating carrier plate 5. In this way, the impeller can cover the upper port of the mating cavity 58. After positioning the impeller, the arc surface pressing plate 105 on the second limiting plate 101 is inserted into the shaft hole on the impeller. Then, the hydraulic rod 2 can be started to drive the grinding bearing ring 4 to move downward. As the grinding bearing ring 4 moves downward, under the action of the mating rack 32, it will drive the gear 562 to rotate. As the gear 562 rotates, it will also drive the rotating carrier plate 5 to rotate until the rotating carrier plate 5 rotates to a horizontal state. At this time, the rotating carrier plate 5 with the impeller enters the grinding bearing cylinder 3. During the rotation of the rotating carrier plate 5, as the rotating carrier plate 5 rotates, under the restriction of the mating support 43, the driving connecting block 6 cannot move downward. This will make the distance between the lower end surface of the rotating carrier plate 5 and the driving connecting block 6 smaller. As the distance between the rotating carrier plate 5 and the driving connecting block 6 becomes smaller, the connecting spring 63 will be in a compressed state. At the same time, under the action of the first connecting rod 64, it will drive the driving frame 7 to move away from the moving channel 51. In this way, under the action of the second connecting rod 73, it will drive the connecting carrier plate 8 to move downward relative to the rotating carrier plate 5. As the connecting carrier plate 8 moves downward relative to the rotating carrier plate 5, under the action of the mating cavity plate 84, a negative pressure will be formed in the mating cavity 58, and then the impeller can be adsorbed and fixed under the action of the negative pressure. At the same time, as the connecting carrier plate 8 moves downward, since the connecting insertion plate 92 on the first limiting plate 9 is inserted into the connecting insertion hole 81 on one of the connecting carrier plates 8, when the connecting carrier plate 8 connected to the first limiting plate 9 moves downward relative to the rotating carrier plate 5, it will also drive the first limiting plate 9 to move downward until the first limiting plate 9 no longer contacts the impeller. After the impeller is preliminarily fixed under the action of the negative pressure, as the rotating carrier plate 5 further rotates, the distance between the driving connecting block 6 and the lower end surface of the rotating carrier plate 5 will be further reduced. In this way, under the action of the second connecting rod 73, it will further drive the connecting carrier plate 8 to move downward, so that the negative pressure in the mating cavity 58 can be further increased to fix the impeller well. And as the driving frame 7 moves, the mating carrier strip 71 on the driving frame 7 will contact the lower convex plate 103 on the second limiting plate 101. In this way, under the action of the mating carrier strip 71, it will push the lower convex plate 103 to move away from the rotating carrier plate 5, and then drive the second limiting plate 101 to move away from the impeller, so that the second limiting plate 101 is separated from the impeller, and the first limiting plate 9 and the second limiting plate 101 no longer play a role in limiting the impeller.Moreover, the separation of the first limiting plate 9 and the second limiting plate 101 from the impeller also effectively avoids the obstruction of the first limiting plate 9 and the second limiting plate 101 to the grinding of the impeller during the grinding process of the impeller, ensuring the smooth grinding of the impeller. In addition, when the second limiting plate 101 moves away from the impeller, it will also drive the arc surface pressing plate 105 on the second limiting plate 101 to move towards the inner wall of the impeller shaft hole, so that the arc surface pressing plate 105 contacts the inner wall of the impeller shaft hole, enabling the arc surface pressing plate 105 to tightly press against the inner wall of the impeller shaft hole, providing auxiliary pressing and fixing for the impeller, and further enhancing the stability of the impeller fixation. Furthermore, when the impeller is being ground, the rotating carrier plate 5 rotates to a horizontal state, which can better support the impeller, ensuring its stability during the grinding process and avoiding the influence of gravity on its fixation in the inclined state. And making the impeller in a horizontal state can also enable the abrasive grains and fluid to evenly grind it, ensuring the grinding quality. After grinding, the hydraulic rod 2 is started again to drive the grinding bearing ring 4 to move upward, driving the impeller out of the grinding bearing cylinder 3. During the upward movement, the rotating carrier plate 5 will rotate in the reverse direction under the action of the engaging rack 32 and return to the inclined state again. This can ensure that the abrasive grains and fluid will not accumulate on the impeller, enabling the abrasive grains and fluid to smoothly slide into the grinding bearing cylinder 3. At the same time, as the rotating carrier plate 5 rotates in the reverse direction, the distance between the driving connecting block 6 and the lower end surface of the rotating carrier plate 5 also increases, thereby driving the driving frame 7 and the connecting carrier plate 8 to reset, and then the negative pressure disappears, losing the fixation of the impeller. At the same time, the first limiting plate 9 supports the impeller again. And with the reset of the driving frame 7, the second limiting plate 101 will also reset under the action of the spring 106, and limit the impeller from both sides again. Then the impeller can be removed from the rotating carrier plate 5 very conveniently.

[0041] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grinding device for grinding the rotating surface of an acid-resistant pump impeller, comprising a body, characterized in that: A grinding bearing assembly is provided inside the machine body, and the impeller is ground inside the grinding bearing assembly; An impeller bearing mechanism is installed on the grinding bearing assembly, and the impeller bearing mechanism includes a hydraulic rod, a grinding bearing ring and a rotating carrier plate. The hydraulic rod is fixedly connected to the grinding bearing ring, and the impeller is supported by the impeller bearing mechanism when the impeller is ground; The hydraulic rod drives the grinding bearing ring to move up and down. The rotating carrier plate is installed on the grinding bearing ring. When the grinding bearing ring moves up and down, it cooperates with the rack to drive the rotating carrier plate to rotate; The impeller bearing mechanism is provided with an impeller positioning assembly, through which the impeller is limited so that the impeller is accurately placed on the impeller bearing mechanism; The impeller bearing mechanism is also provided with an impeller fixing assembly, through which the impeller is fixed, and when the impeller bearing mechanism moves, the impeller fixing assembly is driven to move.

2. A grinding device for grinding the rotating surface of an acid-resistant pump impeller according to claim 1, characterized in that: The grinding bearing assembly is a grinding bearing cylinder, and the grinding bearing cylinder is fixedly arranged inside the machine body.

3. A grinding device for grinding the rotating surface of an acid-resistant pump impeller according to claim 2, characterized in that: A matching rack is fixedly arranged inside the grinding bearing cylinder, and the impeller bearing mechanism is driven by the matching rack.

4. A grinding device for grinding the rotating surface of an acid-resistant pump impeller according to claim 3, characterized in that: The impeller positioning assembly includes a first limiting plate and a second limiting plate. The first limiting plate is arranged on both sides of the rotating carrier plate to limit the impeller from both sides.

5. A grinding device for grinding the rotating surface of an acid-resistant pump impeller according to claim 4, characterized in that: The second limiting plate supports and limits the impeller from the lower side when the rotating carrier plate is in an inclined state.

6. A grinding device for grinding the rotating surface of an acid-resistant pump impeller according to claim 5, characterized in that: The impeller fixing assembly comprises a driving connecting block, a driving frame and a connecting carrier plate. The driving connecting block and the rotating carrier plate move relative to each other to drive the driving frame to move.

7. A grinding device for grinding the rotating surface of an acid-resistant pump impeller according to claim 6, characterized in that: The driving frame drives the connecting carrier plate to move, and fixes the impeller through the connecting carrier plate.

8. A grinding device for grinding the rotating surface of an acid-resistant pump impeller according to claim 7, characterized in that: The connecting carrier plate can drive the first limiting plate to move so that the first limiting plate is separated from the impeller.

9. A grinding device for grinding the rotating surface of an acid-resistant pump impeller according to claim 8, characterized in that: The driving frame can also drive the second limiting plate to move, and drive the second limiting plate to tighten the impeller.

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