CN-121973045-A - Main water pipe polishing device and method for heat exchanger machining

CN121973045ACN 121973045 ACN121973045 ACN 121973045ACN-121973045-A

Abstract

The invention discloses a main water pipe polishing device and method for heat exchanger processing, and relates to the technical field of water pipe polishing equipment. The main water pipe polishing device for heat exchanger processing is tightly attached to the heat conducting plate through the bottom of the polishing block, local high temperature generated by polishing can be quickly transferred to heat conducting oil in the heat conducting oil pipe through the heat conducting plate and the heat conducting rod, so that instant heat dissipation of a polishing contact area is realized, meanwhile, the physical characteristics of heat conducting oil expansion caused by heating are utilized, the first one-way valve and the second one-way valve are matched to form a directional annular flow loop, the high-temperature heat conducting oil automatically flows into the annular heat dissipating pipe to dissipate heat, the low-temperature heat conducting oil is supplemented to the heat conducting oil pipe, continuous circulating cooling can be realized without external power, and therefore, the problem of thermal deformation of the inner wall of the main water pipe, such as bending, ovalization, ultra-poor size and the like due to uneven heat expansion and cold contraction is avoided, the polishing quality of products is improved, and the processing yield and the service performance of the main water pipe of the heat exchanger are remarkably improved.

Inventors

CHEN ZHENGJUN
LI BIN
WANG PING
Nie Junchu

Assignees

摩丁普信热能技术（江苏）有限公司

Dates

Publication Date: 20260505
Application Date: 20260408

Claims (10)

1. Main water pipe grinding device is used in heat exchanger processing, including the processing platform, its characterized in that still includes: The lower water pipe limiting assembly is arranged on the right side of the top of the processing table and used for lifting a main water pipe of a heat exchanger to be polished and driving the main water pipe to rotate in the polishing process, and two sliding rails for providing movable guide for the lower water pipe limiting assembly are fixedly arranged on the right side of the top of the processing table; the upper limiting assemblies are uniformly arranged on one side of the lower limiting assembly and are used for limiting the main water pipe of the heat exchanger by being matched with the lower limiting assembly so as to ensure the rotation stability of the main water pipe of the heat exchanger; The grinding mechanism is arranged at the left side of the top of the processing table and is used for carrying out grinding operation on the inner wall of the main water pipe of the heat exchanger, automatically sucking grinding dust in the grinding process, and continuously radiating and cooling the part contacted with the inner wall of the main water pipe of the heat exchanger so as to avoid the situation that uneven expansion and contraction are caused by local high temperature and heat deformation of the main water pipe of the heat exchanger is caused; And the control box is fixedly arranged at the left side of the top of the processing table and used for controlling the operation of all electrical equipment.
2. The main water pipe polishing device for heat exchanger machining is characterized in that the lower limit component of the water pipe comprises a two-way screw rod which is rotatably arranged at the top of a machining table through a mounting bracket, a first thread sleeve and a second thread sleeve are symmetrically arranged on two sides of the outer wall of the two-way screw rod, thread matching is formed between the first thread sleeve and the outer wall of the two-way screw rod, the first thread sleeve and the second thread sleeve can synchronously approach to or separate from each other under the driving of the two-way screw rod, a long rotating shaft penetrates through the first thread sleeve and the second thread sleeve in a rotating mode, sliding sleeves are rotatably arranged at two ends of the long rotating shaft, a first lifting roller and a second lifting roller are fixedly sleeved on the outer wall of the long rotating shaft and positioned on two sides of the two-way screw rod respectively, and a driving motor is further slidably arranged on one side of the top of the machining table, and an output shaft of the driving motor is connected with the end portion of one long rotating shaft through a coupling.
3. The main water pipe polishing device for heat exchanger machining according to claim 1, wherein the upper limit component of the water pipe comprises an L-shaped bracket fixedly arranged on the side wall of the machining table, a first air cylinder is fixedly arranged at the top of the L-shaped bracket, an output shaft of the first air cylinder penetrates through the L-shaped bracket in a sliding mode and is fixedly provided with a wheel frame, and first rollers and second rollers are symmetrically arranged on two sides of the inside of the wheel frame in a rotating mode.
4. The main water pipe polishing device for heat exchanger machining according to claim 1, wherein the grinding mechanism comprises two cross-shaped sliding rails fixedly arranged on the front side and the rear side of the top of the machining table, a sliding seat is sleeved on the outer walls of the two cross-shaped sliding rails in a sliding mode, a second air cylinder is fixedly arranged on one side of the top of the machining table, an output shaft of the second air cylinder is fixedly connected with the sliding seat and used for pushing the sliding seat to move along the outer wall of the cross-shaped sliding rail, a servo motor is fixedly arranged on the side wall of the sliding seat, an output shaft of the servo motor penetrates through the sliding seat in a rotating mode and is fixedly provided with an upper belt pulley, tooth belts are sleeved on the side wall of the sliding seat and below the upper belt pulley in a rotating mode, a transmission shaft is fixedly arranged at one end of the lower belt pulley, a polishing mechanism used for polishing a main water pipe of the heat exchanger is arranged at one end of the transmission shaft, the servo motor circularly operates between a set first rotating speed and a second rotating speed, the first rotating speed is smaller than the second rotating speed, and a switching time interval of the first rotating speed and the second rotating speed is five minutes.
5. The main water pipe polishing device for heat exchanger machining according to claim 4, wherein the polishing mechanism comprises an outer cylinder body detachably arranged at one end of the transmission shaft through bolts, a plurality of groups of dust collecting channels are uniformly formed in the outer wall of the outer cylinder body, each group of dust collecting channels is composed of a plurality of dust collecting holes which are equidistantly arranged, a plurality of polishing block mounting grooves are uniformly formed in the outer wall of the outer cylinder body along the circumferential direction, polishing blocks are detachably arranged in the polishing block mounting grooves through bolts, one surface of each polishing block, which is far away from each polishing block mounting groove, is designed into an arc surface and protrudes out of each polishing block mounting groove and is used for being in contact with the inner wall of the main water pipe of the heat exchanger, and a plurality of heat conducting plate mounting grooves are uniformly formed in the bottom of each polishing block mounting groove.
6. A main water pipe polishing device for heat exchanger processing is characterized in that one end of an outer cylinder body, which is close to a transmission shaft, is fixedly provided with an annular radiating pipe, one side of the annular radiating pipe is uniformly provided with a plurality of heat exchange units connected with the annular radiating pipe, each heat exchange unit comprises a heat conducting oil pipe fixedly arranged on the inner wall of the outer cylinder body, one side of the inner part of the heat conducting oil pipe is fixedly provided with a short guide pipe for inputting the internal heat conducting oil into the annular radiating pipe, the inner part of the short guide pipe is fixedly provided with a first one-way valve which only allows the heat conducting oil to flow out of the heat conducting oil pipe, one side of the inner part of the heat conducting oil pipe is fixedly provided with a long guide pipe for inputting the heat conducting oil into the heat conducting oil pipe, the inner part of the long guide pipe is fixedly provided with a second one-way valve which only allows the heat conducting oil to flow into the heat conducting oil pipe, one end of each heat conducting rod penetrates through the heat conducting oil pipe and the outer wall of the outer cylinder body and is fixedly provided with a heat conducting plate, the heat conducting plate is fixedly arranged in a heat conducting plate mounting groove, and the other ends of the short guide pipe and the long guide pipe are connected with the annular radiating pipe.
7. A main water pipe polishing device for heat exchanger processing is characterized in that an inner cylinder body is coaxially and fixedly arranged in the outer cylinder body, a piston is arranged in the inner cylinder body in a sealing sliding mode, a return spring is fixedly arranged between the piston and the inner wall of the inner cylinder body, a guide block is fixedly arranged on the outer wall of the piston, a guide groove matched with the guide block in structure is formed in the inner wall of the inner cylinder body, sliding fit is formed between the guide block and the guide groove, two centrifugal assemblies are symmetrically arranged at the upper position and the lower position of one end, far away from the return spring, of the piston, the piston is pushed to approach towards the annular radiating pipe by utilizing centrifugal force, a dust capturing unit for collecting polishing dust is further arranged at one side, close to the centrifugal assemblies, of the inner cylinder body, a plurality of dust guide pipes communicated with the inner side of the inner cylinder body are uniformly and fixedly arranged on the outer wall of the inner cylinder body, a dust collecting pipe is fixedly arranged at one end, far away from the inner cylinder body, of the dust collecting pipe is fixedly provided with a third one-way valve which only allows gas to enter the inner cylinder body, and the dust collecting pipe is fixedly arranged on the inner wall of the outer cylinder body.
8. The main water pipe polishing device for heat exchanger machining is characterized in that the centrifugal assembly comprises a centrifugal box fixedly arranged at the end part of a piston, a centrifugal slide block is arranged in the centrifugal box in a sliding mode, an L-shaped rod is fixedly arranged at the bottom of the centrifugal slide block and penetrates through the centrifugal box in a sliding mode and extends to the outside, one end, far away from the centrifugal box, of the L-shaped rod is further rotatably provided with a guide wheel, an inclined plate is fixedly arranged on the inner wall of the inner barrel body, the guide wheel slides along the inclined plane of the inclined plate, an avoidance hole is formed in the top of the centrifugal slide block, a guide column matched with the avoidance hole in a structure is fixedly arranged at the top of an inner cavity of the centrifugal box, the avoidance hole is sleeved on the outer wall of the guide column in a sliding mode, and a tensioning spring used for pushing the centrifugal slide block to reset is arranged on the outer wall of the guide column in a sliding mode between the centrifugal slide block and the centrifugal box.
9. The main water pipe polishing device for heat exchanger machining according to claim 7, wherein the dust capturing unit comprises a dust collecting barrel fixedly arranged on the inner wall of the inner barrel, one end of the dust collecting barrel, which is close to the piston, is in threaded connection with a conical guide barrel, the other end of the dust collecting barrel is in threaded connection with a baffle plate, and a plurality of exhaust channels are uniformly formed on the inner wall, which is close to the dust collecting barrel, of the inner barrel, and are used for exhausting gas in the dust collecting barrel into a gap between the inner barrel and the outer barrel through the exhaust channels.
10. A polishing method for a main water pipe for heat exchanger processing is characterized by comprising the following steps: Step 1, placing a main water pipe of a heat exchanger to be polished at a lifting position of a lower water pipe limiting assembly, rotating an adjusting part of the lower water pipe limiting assembly to enable the lower water pipe limiting assembly to be matched with the pipe diameter of the main water pipe to complete primary lifting, then controlling an upper water pipe limiting assembly to act, enabling the upper water pipe limiting assembly to complete pressing limiting from above the main water pipe, and matching the lower water pipe limiting assembly to realize coaxial fixation of the main water pipe, so that the rotation stability of the main water pipe in the polishing process is ensured, and guiding is provided for the movement of the lower water pipe limiting assembly through a sliding rail in the whole process; Step 2, starting all electrical equipment through a control box, controlling a grinding mechanism to move to a grinding inlet of a main water pipe along the machining direction, adjusting the contact position between the grinding end of the grinding mechanism and the inner wall of the main water pipe, starting dust suction and heat dissipation cooling functions of the grinding mechanism, and setting various parameters before grinding; Step 3, controlling the lower limit assembly of the water pipe to drive the main water pipe to rotate at a constant speed around the axis of the main water pipe through the control box, simultaneously controlling the grinding mechanism to grind the inner wall of the main water pipe, keeping automatic suction of grinding dust by the grinding mechanism in the grinding process, and continuously radiating and cooling the part contacted with the inner wall of the main water pipe so as to avoid thermal deformation of the main water pipe caused by local high temperature; And 4, after the whole polishing of the main water pipe is finished, firstly closing the grinding, dust suction and heat dissipation cooling functions of the grinding mechanism through a control box, then controlling the upper limiting component of the water pipe to reset and release the upper limit, then adjusting the lower limiting component of the water pipe to release the lifting limit of the main water pipe, taking down the polished main water pipe, and finally closing all electrical equipment through the control box to finish the polishing operation.

Description

Main water pipe polishing device and method for heat exchanger machining Technical Field The invention relates to the technical field of water pipe polishing equipment, in particular to a main water pipe polishing device and method for heat exchanger processing. Background In the process of heat exchanger processing and manufacturing, the main water pipe is used as a core pipeline component of a heat exchange system, and polishing treatment quality of pipe orifices, inner and outer walls and weld surfaces of the main water pipe directly influences subsequent welding tightness, anti-corrosion coating adhesion and pipeline circulation performance. Refer to the pipeline inner wall equipment of polishing that patent application of publication number CN120985447A discloses, through spacing metal pipeline of structures such as spacing ring, limiting plate and holding ring, ensure to polish stably, motor drive is polished the grinding wheel and is rotated, cooperates first pneumatic cylinder to promote and realizes comprehensively polishing, simultaneously, the adsorption roll of polyester fiber material on the grinding wheel, can effectively adhere the metal dust that produces of polishing, avoid the dust to pile up to influence the quality of polishing, interfere with the grinding wheel removal, has promoted polishing effect and efficiency. The polishing equipment for the inner wall of the pipeline in the prior art has the following defects in actual use: 1) In the polishing process, a large amount of local high temperature can be generated at the polished part, the traditional equipment has no special heat dissipation structure, the heat accumulation is easy to cause uneven expansion and contraction of the main water pipe, the thermal deformation, ovalization and even the ultra-poor size of the pipe wall are caused, and the yield and the product performance are greatly reduced. 2) In addition, although the adsorption roller in the above patent can adsorb partial metal dust, a large amount of grinding dust can still fly in an unstructured manner, so that not only is the production environment polluted, operators are endangered to health, but also the grinding quality can be influenced by being attached to the inner wall, and the conventional dust removing equipment needs to be additionally provided with a power source, and has a complex structure and high energy consumption. Therefore, the present invention provides a polishing device and a polishing method for a main water pipe for heat exchanger processing to solve the above problems. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a main water pipe polishing device and a main water pipe polishing method for heat exchanger processing, which solve the problems that a large amount of local high temperature is generated at the grinding part of the conventional polishing equipment, a special heat dissipation structure is not arranged in the conventional equipment, uneven expansion and contraction of heat of the main water pipe are easily caused by heat accumulation, the thermal deformation and ovalization of the pipe wall are caused, the product performance and the yield are greatly reduced, grinding dust flies in an unorganized manner, the production environment is polluted, the body health of operators is endangered, the polishing quality is influenced by the adhesion of the grinding dust to the inner wall, and the conventional dust removing equipment needs to be additionally provided with a power source, and has a complex structure and high energy consumption. The main water pipe polishing device for heat exchanger processing comprises a processing table and further comprises: The lower water pipe limiting assembly is arranged on the right side of the top of the processing table and used for lifting a main water pipe of a heat exchanger to be polished and driving the main water pipe to rotate in the polishing process, and two sliding rails for providing movable guide for the lower water pipe limiting assembly are fixedly arranged on the right side of the top of the processing table; the upper limiting assemblies are uniformly arranged on one side of the lower limiting assembly and are used for limiting the main water pipe of the heat exchanger by being matched with the lower limiting assembly so as to ensure the rotation stability of the main water pipe of the heat exchanger; The grinding mechanism is arranged at the left side of the top of the processing table and is used for carrying out grinding operation on the inner wall of the main water pipe of the heat exchanger, automatically sucking grinding dust in the grinding process, and continuously radiating and cooling the part contacted with the inner wall of the main water pipe of the heat exchanger so as to avoid the situation that uneven expansion and contraction are caused by local high temperature and heat deformation of the main water pipe of the heat exchanger is c