A polishing device and method for an inner flow passage of a pump product

Abstract

The application discloses a polishing device for an inner flow channel of a pump product, which comprises a clamping handle, one end of the clamping handle is fixedly connected with a flexible pipe, a steel wire rope bundle is arranged outside the flexible pipe, the other end of the clamping handle is fixedly connected with an air inlet pipe, the air inlet pipe is communicated with the inside of the flexible pipe, the end of the flexible pipe away from the clamping handle is fixedly connected with a driving box, and the side of the driving box away from the flexible pipe is rotatably connected with a rotating head. The application further discloses a polishing method for the polishing device for the inner flow channel of the pump product, which comprises the following steps: S1, connecting an air injection equipment; S2, inserting the device; S3, air injection and polishing; and S4, cleaning the device. Through the arrangement of the flexible pipe and the steel wire rope bundle, the main part of the device can be twisted at will, the polishing head can smoothly reach the polishing area, and a process hole does not need to be additionally arranged on the outer wall of the pump shell, so that the production cycle and the cost are effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of pump product flow channel processing technology, and in particular to a grinding device and method for the internal flow channel of pump products. Background Technology

[0002] In the processing of pump products, it is often necessary to grind the internal flow channels, such as centrifugal pumps. The internal flow channels have a long section of curved and closed space. During the casting process, it is inevitable that inclusions, porosity, and other casting defects will be generated. The presence of these defects will affect the smooth flow of fluid in the pump and have a significant impact on the pump body's vibration and head.

[0003] Existing grinding devices are all linear drives. For relatively narrow and curved internal flow channels of pumps, it is difficult for the grinding devices to enter and perform grinding operations on the designated flow channel area. Often, process holes need to be added to the outer wall of the pump casing to clean defects on the inner surface of the flow channel. After cleaning, the process holes need to be sealed by butt-welded cover plates. Butt welding requires high technical skills from welding workers and is prone to defects such as weld beads and incomplete weld penetration. The process holes and cover plates need to be dimensionally controlled by CNC machining, which greatly increases the production cycle and cost. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a grinding device and method for the internal flow channels of pump products.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A grinding device for the internal flow channel of a pump product includes a clamp handle. One end of the clamp handle is fixedly connected to a flexible tube, and a steel wire rope bundle is provided on the outside of the flexible tube. The other end of the clamp handle is fixedly connected to an air inlet pipe, which communicates with the interior of the flexible tube. A drive box is fixedly connected to the end of the flexible tube away from the clamp handle. A rotating head is rotatably connected to the side of the drive box away from the flexible tube. A grinding head is fixedly installed on the rotating head. The drive box communicates with the interior of the flexible tube. A rotating shaft is rotatably connected inside the drive box. A drive gear is fixedly connected to the rotating shaft. Multiple centrifugal blades are also fixedly connected to the side wall of the rotating shaft. The connection between the drive box and the flexible tube faces the windward side of the centrifugal blades. A driven gear is also rotatably connected inside the drive box. The driven gear is coaxially fixedly connected to the rotating head.

[0007] Preferably, multiple heat-conducting brackets are welded to the side wall of the drive box, and a ring frame is fixedly connected to the end of the multiple heat-conducting brackets away from the drive box. A hollow groove is opened in the side wall of the ring frame, and multiple Z-shaped tubes communicating with the inside of the hollow groove are fixedly installed on the inner wall of the ring frame. A collection box is fixedly connected to the side wall of the drive box, and a filter screen is embedded in the collection box. The hollow groove communicates with the inside of the collection box through a conveying mechanism.

[0008] Preferably, the conveying mechanism includes a mechanism box fixedly connected to the drive box, a top plug is slidably connected inside the mechanism box, an air intake pipe is connected between the mechanism box and the hollow groove, an exhaust pipe is connected between the mechanism box and the collection box, a one-way valve is installed in both the air intake pipe and the exhaust pipe, the top plug is moved by a jacking mechanism, and an air outlet pipe communicating with the interior of the drive collection box is provided at the upper end of the drive collection box.

[0009] Preferably, the jacking mechanism includes an incomplete gear rotatably connected in the drive box, the incomplete gear being coaxially and fixedly connected to the driven gear, a rack being slidably connected in the mechanism box and extending into the drive box, and the jack being fixedly connected to the top of the mechanism box by a spring.

[0010] Preferably, a scraper is slidably connected inside the collection box, and the scraper is fitted to the filter screen. The scraper is fixedly connected to the top plug via a U-shaped rod.

[0011] Preferably, an arc-shaped copper tube is fixedly connected to the heat-conducting bracket, and the arc-shaped copper tube is connected to the inside of the drive box through a gas guide pipe.

[0012] This invention also proposes a grinding method for a grinding device for the internal flow channel of pump products, comprising the following steps:

[0013] S1. Connect the air injection equipment by connecting the air inlet pipe to the air compressor or other air injection equipment so that high-pressure air can smoothly enter the air inlet pipe.

[0014] S2. Insert the device into the flow channel, continuously twist the flexible tube and wire rope bundle in the middle part to pass smoothly through the curved and closed flow channel, and make the grinding head reach the position that needs to be ground.

[0015] S3. Injecting air and polishing: Start the air injection equipment to inject high-pressure air into the air inlet pipe, which can drive the centrifugal blades and shaft to rotate. Then, through the drive gear and driven gear, the polishing head can be driven to polish the designated area of ​​the flow channel.

[0016] S4, the cleaning device, removes the debris accumulated in the collection box during the grinding process and cleans the entire equipment.

[0017] The present invention has the following beneficial effects:

[0018] 1. By setting up flexible tubes and wire rope bundles, the main body of the device can be twisted at will, and the wire rope bundles can constrain the twisted flexible tubes. In this way, after the device is inserted into the flow channel, the flexible tubes and wire rope bundles can be twisted, so that the grinding head can smoothly reach the grinding area without the need to add process holes on the outer wall of the pump casing, which effectively reduces the production cycle and cost.

[0019] 2. By setting up a conveying mechanism and a collection box, the grinding debris can be recycled. On the one hand, this can prevent the debris from flying around and polluting the air. On the other hand, centralized processing of the recycled debris can prevent the waste of metal materials.

[0020] 3. By setting up a heat-conducting bracket and an arc-shaped copper pipe, when the high-pressure air drives the centrifugal blades, shaft and grinding head to rotate, the airflow passes through the arc-shaped copper pipe, which can quickly dissipate the high temperature heat generated by grinding, cool down the device and pump body, and avoid high temperature damage to the device or pump body flow channel. Attached Figure Description

[0021] Figure 1 This is a front cross-sectional view of a grinding device for the internal flow channel of a pump product proposed in this invention.

[0022] Figure 2 This is a side view of the components in this invention, including the grinding head, heat-conducting bracket, rotating head, arc-shaped copper tube, and air duct.

[0023] Figure 3 for Figure 1 Enlarged schematic diagram of the structure at point A in the diagram;

[0024] Figure 4 A schematic diagram of the connection structure between the ring frame and the Z-shaped tube in this invention;

[0025] Figure 5 A side view of the connection between the driven gear and the incomplete gear in this invention.

[0026] In the diagram: 1. Clamp handle, 2. Inlet pipe, 3. Flexible pipe, 4. Steel wire rope bundle, 5. Drive box, 6. Rotating head, 7. Grinding head, 8. Shaft, 9. Centrifugal blade, 10. Drive gear, 11. Driven gear, 12. Incomplete gear, 13. Rack, 14. Ring frame, 15. Z-shaped tube, 16. Heat conduction bracket, 17. Intake pipe, 18. Arc-shaped copper tube, 19. Air guide pipe, 20. Top plug, 21. Spring, 22. Collection box, 23. Filter screen, 24. Exhaust pipe, 25. U-shaped rod, 26. Air outlet pipe, 27. Scraper, 28. Hollow groove, 29. Mechanism box. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Reference Figure 1-5 A grinding device for the internal flow channel of a pump product includes a clamp 1, one end of which is fixedly connected to a flexible tube 3. A steel wire rope bundle 4 is provided on the outside of the flexible tube 3. The steel wire rope bundle 4 can constrain the twisted flexible tube 3. In this way, after the device is inserted into the flow channel, the flexible tube 3 and the steel wire rope bundle 4 can be twisted into corresponding shapes, so that the grinding head can smoothly reach the grinding area without the need to add process holes on the outer wall of the pump casing, effectively reducing the production cycle and cost.

[0029] The other end of the clamp 1 is fixedly connected to an air inlet pipe 2, which communicates with the interior of the flexible tube 3. A drive box 5 is fixedly connected to the end of the flexible tube 3 away from the clamp 1. A rotating head 6 is rotatably connected to the side of the drive box 5 away from the flexible tube 3, and a grinding head 7 is fixedly mounted on the rotating head 6. Specifically, as shown... Figure 1 As shown, the grinding head 7 is fixedly mounted on the rotating head 6 by a washer and a locking screw.

[0030] The drive box 5 is connected to the interior of the flexible tube 3. A rotating shaft 8 is rotatably connected inside the drive box 5. A drive gear 10 is fixedly connected to the rotating shaft 8. Multiple centrifugal blades 9 are also fixedly connected to the side wall of the rotating shaft 8. The connection between the drive box 5 and the flexible tube 3 is directly facing the windward side of the centrifugal blades 9. A driven gear 11 is also rotatably connected inside the drive box 5. The driven gear 11 is coaxially fixedly connected to the rotating head 6.

[0031] Multiple heat-conducting brackets 16 are welded to the side wall of the drive box 5. The ends of the multiple heat-conducting brackets 16 away from the drive box 5 are fixedly connected to a ring frame 14. A hollow groove 28 is opened on the side wall of the ring frame 14. Multiple Z-shaped tubes 15 communicating with the inside of the hollow groove 28 are also fixedly installed on the inner wall of the ring frame 14. A collection box 22 is fixedly connected to the side wall of the drive box 5. A filter screen 23 is embedded in the collection box 22. The hollow groove 28 is connected to the inside of the collection box 22 through a conveying mechanism.

[0032] A scraper 27 is slidably connected inside the collection box 22, and the scraper 27 is set to fit the filter screen 23. The scraper 27 is fixedly connected to the top plug 20 through the U-shaped rod 25.

[0033] The conveying mechanism includes a mechanism box 29 fixedly connected to the drive box 5. A top plug 20 is slidably connected inside the mechanism box 29. An air intake pipe 17 is connected between the mechanism box 29 and the hollow groove 28. An exhaust pipe 24 is connected between the mechanism box 29 and the collection box 22. Both the air intake pipe 17 and the exhaust pipe 24 are equipped with one-way valves. Specifically, the one-way valve in the air intake pipe 17 restricts air from flowing into the mechanism box 29 in one direction only, while the one-way valve in the exhaust pipe 24 restricts air from flowing from the mechanism box 29 to the exhaust pipe 24 in one direction only.

[0034] The top plug 20 is moved by the jacking mechanism, which drives the collection box 22 to have an air outlet pipe 26 that communicates with its interior.

[0035] The jacking mechanism includes an incomplete gear 12 rotatably connected within the drive box 5. The incomplete gear 12 is coaxially and fixedly connected to the driven gear 11. A rack 13 is slidably connected within the mechanism box 29, extending into the drive box 5. A jacking plug 20 is fixedly connected to the top of the mechanism box 29 via a spring 21. It should be noted that one end of the spring 21 is fixedly connected to the jacking plug 20, and the other end is fixedly connected to the top of the mechanism box 29. By providing the spring 21, the incomplete gear 12 can periodically mesh with the rack 13 when rotating, causing the rack 13 to reciprocate up and down under the action of the spring 21.

[0036] An arc-shaped copper tube 18 is fixedly connected to the heat-conducting bracket 16, and the arc-shaped copper tube 18 is connected to the inside of the drive box 5 through a vent pipe 19. Specifically, as shown... Figure 1 As shown, one end of the air guide pipe 19 connected to the drive box 5 is directly opposite the periphery of the centrifugal blade 9. When high-pressure air enters the drive box 5 and pushes the centrifugal blade 9 to rotate, it can be quickly discharged from the air guide pipe 19 into the arc-shaped copper pipe 18.

[0037] This invention also proposes a grinding method for a grinding device for the internal flow channel of pump products, comprising the following steps:

[0038] S1. Connect the air injection equipment. Connect the air inlet pipe 2 to the air compressor or other air injection equipment so that high-pressure air can smoothly enter the air inlet pipe 2.

[0039] S2. Insert the device into the flow channel, continuously twist the flexible tube 3 and steel wire rope bundle 4 in the middle part to pass smoothly through the curved and closed flow channel, and make the grinding head 7 reach the position that needs to be ground.

[0040] S3. Injecting air and polishing: Start the air injection equipment to inject high-pressure air into the air inlet pipe 2, which can drive the centrifugal blades 9 and the rotating shaft 8 to rotate. Then, through the drive gear 10 and the driven gear 11, the polishing head 7 can be driven to polish the designated area of ​​the flow channel.

[0041] S4, the cleaning device, removes the debris accumulated in the collection box 22 during the grinding process and performs a cleaning operation on the entire equipment.

[0042] The specific work process is as follows:

[0043] After connecting the air injection equipment, insert this device into the inner flow channel of the pump body. The flexible tube 3 and steel wire rope bundle 4 in the middle section can be twisted continuously, so that the entire device can continue to move smoothly along the inner flow channel until the grinding head 7 reaches the designated grinding area. Then, high-pressure air is introduced into the air inlet pipe 2 by the air injection equipment. The airflow can be blown into the drive box 5 through the air inlet pipe 2 and the flexible tube 3. Since the connection between the drive box 5 and the flexible tube 3 is directly facing the windward side of the centrifugal blade 9, when the high-pressure airflow blows towards the centrifugal blade 9, it will push the centrifugal blade 9 and the rotating shaft 8 to rotate. This will drive the drive gear 10 to rotate, and cause the driven gear 11 meshing with the drive gear 10 to rotate. Since the size of the drive gear 10 is larger than that of the driven gear 11, the driven gear 11 can be driven to rotate at high speed. This will drive the grinding head 77, which is coaxially fixedly connected to the driven gear 11, to rotate synchronously at high speed. This will grind the designated area of ​​the inner flow channel of the pump body.

[0044] During this process, the driven gear 11 will also drive the incomplete gear 12, which is fixedly connected to it on the same axis, to rotate together. During the rotation of the incomplete gear 12, its toothed part will continuously mesh with the rack 13 on the upper side. Whenever the incomplete gear 12 meshes with the rack 13, it will push the rack 13 to move upward. The rack 13 can also push the top plug 20 in the mechanism box 29 to move upward. At the same time, it will also compress the spring 21. When the toothed part of the incomplete gear 12 disengages from the rack 13, the spring 21 can extend and recover, thereby pushing the top plug 20 to move downward. Therefore, during the continuous rotation of the incomplete gear 12, it can periodically mesh with the rack 13, and under the joint action of the spring 21, the rack 13 moves up and down back and forth. The rack 13 will also push the top plug 20 on it to move back and forth synchronously.

[0045] When the top plug 20 moves downward, the sealed space above it increases, which can generate negative pressure and actively draw air from the suction pipe 17. In this way, the air containing debris generated near the grinding head 7 can be drawn into the hollow groove 28 through the Z-shaped pipes 15 on the ring frame 14, and then drawn into the mechanism box 29 through the suction pipe 17. When the top plug 20 moves upward, it can actively discharge the air containing debris into the collection box 22 along the exhaust pipe 24. After being filtered by the filter screen 23, clean air is discharged out through the air outlet pipe 26. The debris can be trapped on the left side of the filter screen 23 and accumulated in the collection box 22. This can prevent debris from flying around and polluting the air, and can also collect the debris to avoid waste of metal materials.

[0046] Furthermore, it is worth mentioning that when the top plug 20 moves up and down, it will also drive the scraper 27 to move up and down synchronously via the U-shaped rod 25. The scraper 27 can continuously clean the left side of the filter screen 23 to maintain the good permeability of the filter screen 23, allowing the filter screen 23 to perform filtration operations for a longer period of time, greatly extending the replacement cycle of the filter screen 23, thereby reducing the maintenance cost of this device.

[0047] The high-pressure airflow injected into the drive box 5 drives the centrifugal blades 9 and the rotating shaft 8 to rotate. It is then discharged into the arc-shaped copper tube 18 through the air guide pipe 19 and then discharged outward. The heat generated by the grinding head 7 during grinding can be transferred to each heat-conducting bracket 16 through the rotating head 6 and then to the arc-shaped copper tube 18 connected to the heat-conducting bracket 16. When the high-speed airflow is discharged from the air guide pipe 19 into the arc-shaped copper tube 18, the airflow can quickly dissipate the heat generated during grinding, thereby cooling the device and pump body to avoid damage to the surface of the flow channel inside the device or pump body caused by high temperature.

[0048] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A grinding device for the internal flow channel of a pump product, comprising a clamp (1), characterized in that, One end of the clamp (1) is fixedly connected to a flexible tube (3), and a wire rope bundle (4) is provided on the outside of the flexible tube (3). The other end of the clamp (1) is fixedly connected to an air inlet pipe (2), and the air inlet pipe (2) communicates with the interior of the flexible tube (3). The end of the flexible tube (3) away from the clamp (1) is fixedly connected to a drive box (5). A rotating head (6) is rotatably connected to the side of the drive box (5) away from the flexible tube (3). A grinding head (7) is fixedly installed on the rotating head (6). The drive box (5) is connected to the interior of the flexible tube (3). A rotating shaft (8) is rotatably connected inside the drive box (5). A drive gear (10) is fixedly connected to the rotating shaft (8). Multiple centrifugal blades (9) are also fixedly connected to the side wall of the rotating shaft (8). The connection between the drive box (5) and the flexible tube (3) is directly facing the windward side of the centrifugal blades (9). A driven gear (11) is also rotatably connected inside the drive box (5). The driven gear (11) is coaxially fixedly connected to the rotating head (6). Multiple heat-conducting brackets (16) are welded to the side wall of the drive box (5). The ends of the multiple heat-conducting brackets (16) away from the drive box (5) are fixedly connected to a ring frame (14). A hollow groove (28) is opened on the side wall of the ring frame (14). Multiple Z-shaped tubes (15) communicating with the inside of the hollow groove (28) are also fixedly installed on the inner wall of the ring frame (14). A collection box (22) is fixedly connected to the side wall of the drive box (5). A filter screen (23) is embedded in the collection box (22). The hollow groove (28) is connected to the inside of the collection box (22) through a conveying mechanism. The conveying mechanism includes a mechanism box (29) fixedly connected to the drive box (5). A top plug (20) is slidably connected inside the mechanism box (29). An air suction pipe (17) is connected between the mechanism box (29) and the hollow groove (28). An exhaust pipe (24) is connected between the mechanism box (29) and the collection box (22). A one-way valve is installed in both the air suction pipe (17) and the exhaust pipe (24). The top plug (20) is moved by a jacking mechanism. An air outlet pipe (26) is provided at the upper end of the collection box (22) and communicates with its interior. The jacking mechanism includes an incomplete gear (12) rotatably connected in the drive box (5), the incomplete gear (12) being coaxially fixedly connected to the driven gear (11), a rack (13) being slidably connected in the mechanism box (29), and the rack (13) extending into the drive box (5), and the jack plug (20) being fixedly connected to the top of the mechanism box (29) by a spring (21); A scraper (27) is slidably connected inside the collection box (22), and the scraper (27) is set to fit the filter screen (23). The scraper (27) is fixedly connected to the top plug (20) by a U-shaped rod (25).

2. The grinding device for the internal flow channel of a pump product according to claim 1, characterized in that, An arc-shaped copper tube (18) is fixedly connected to the heat-conducting bracket (16), and the arc-shaped copper tube (18) is connected to the inside of the drive box (5) through the air guide tube (19).

3. The grinding method of the grinding device for the internal flow channel of a pump product as described in any one of claims 1-2, characterized in that, Includes the following steps: S1. Connect the air injection equipment and connect the air inlet pipe (2) to the air compressor or other air injection equipment so that high-pressure air can smoothly enter the air inlet pipe (2); S2. Insert the device into the flow channel, continuously twist the flexible tube (3) and wire rope bundle (4) in the middle part to pass smoothly through the curved and closed flow channel, and make the grinding head (7) reach the position that needs to be ground. S3. Injecting air and polishing: Start the air injection equipment to inject high-pressure air into the air inlet pipe (2), which can drive the centrifugal blades (9) and the rotating shaft (8) to rotate. Then, through the drive gear (10) and the driven gear (11), the polishing head (7) can be driven to polish the designated area of ​​the flow channel. S4. Cleaning device: Cleans out the debris accumulated in the collection box (22) during the grinding process and cleans the entire equipment.

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