CN-118003098-B - Forming and drilling integrated device for continuous spiral baffle without central tube

CN118003098BCN 118003098 BCN118003098 BCN 118003098BCN-118003098-B

Abstract

The application discloses a device for forming and drilling a continuous spiral baffle plate without a central tube, which comprises a flat ring unit and a forming system, wherein the flat ring unit comprises an outer ring plate and an inner sector plate, a cutting groove is arranged between the outer ring plate and the inner sector plate, the forming system comprises an upper spiral die and a lower spiral die which are provided with spiral curved surfaces, the outer side of the upper spiral die is provided with a spiral cutting edge with similar spiral parameters as the upper spiral die, the outer ring plate is fixed by a cylinder positioning mechanism, the inner sector plate is suspended between the upper spiral die and the lower spiral die, the spiral cutting edge can firstly contact the cutting groove to cut off the connection between the outer ring plate and the inner sector plate in the downward pressing process of the upper spiral die, and the upper spiral die is contacted with the inner sector plate disconnected with the outer ring plate after the upper spiral die so as to be extruded between the upper spiral die and the lower spiral die, so that the forming process is safer and controllable, and the industrialized continuous production operation of the continuous baffle plate without the central tube of metal material is facilitated.

Inventors

ZHANG CHENGHE
SHA BINBIN
MA SHIHENG
HAN HAOXUE
Cheng Enchao
LI NA

Assignees

山东京博装备制造安装有限公司

Dates

Publication Date: 20260508
Application Date: 20240103

Claims (7)

1. The integrated device for forming and drilling the continuous spiral baffle without the central tube is characterized by comprising a flat circular ring unit and a forming system; The flat circular ring unit comprises an outer ring plate and an inner sector plate, and a cutting groove is arranged between the outer ring plate and the inner sector plate; The forming system comprises an upper spiral die and a lower spiral die with spiral curved surfaces, the spiral curved surfaces of the upper spiral die and the lower spiral die are mutually matched, a cylinder positioning mechanism is arranged outside the lower spiral die, a spiral cutting edge with spiral parameters similar to those of the upper spiral die is arranged on the outer side of the upper spiral die, an outer ring plate is arranged on the cylinder positioning mechanism for fixing, an inner sector plate is suspended between the upper spiral die and the lower spiral die, and in the process that the upper spiral die is pressed downwards towards the lower spiral die, the spiral cutting edge can be firstly contacted with a cutting groove to cut off the connection between the outer ring plate and the inner sector plate, and the inner sector plate disconnected with the outer ring plate is contacted behind the upper spiral die so as to be extruded between the upper spiral die and the lower spiral die to realize forming; The cylinder positioning mechanism comprises a cylinder, a first magnetic attraction ring is arranged on the inner wall of the cylinder, the height of the plane where the first magnetic attraction ring is located coincides with the plane where the highest point of the lower spiral die is located, the ring width of the first magnetic attraction ring is identical to that of the outer ring plate, and the first magnetic attraction ring can generate magnetic force to adsorb and fix the outer ring plate; the upper spiral die is provided with a second magnetic attraction ring, when the inner sector plate is completely extruded between the upper spiral die and the lower spiral die, the second magnetic attraction ring is abutted against the outer ring plate, the magnetic force of the first magnetic attraction ring disappears, and the second magnetic attraction ring generates magnetic force to adsorb the cut outer ring plate; The spiral curved surface of the lower spiral die is provided with a plurality of through holes, the lower spiral die can generate magnetic force to adsorb the formed inner sector plate, the lower spiral die is connected with a power system, and the power system can drive the lower spiral die to linearly move so as to bring the formed inner sector plate below the drilling system; In the pressing process of the upper spiral die, the spiral cutting edge firstly contacts with the cutting groove, the spiral cutting edge firstly cuts off one part of the outer ring plate and the inner sector plate to be connected, then the upper spiral die is abutted with the inner sector plate of the cut-off part to enable the inner ring plate not to be cut off to be pressed down, the inner sector plate which is not cut off to be connected is still connected with the outer ring plate, in the forming process, the inner sector plate can be kept in a stable posture all the time and cannot deviate, therefore, the accurate shape control of forming of the spiral baffle without a central tube is realized, and the cutting groove can introduce a preset cutting path on the flat ring unit, so that the spiral cutting edge is easier to guide and control.
2. The integrated device for forming and drilling the continuous spiral baffle without the central tube according to claim 1, wherein the drilling system comprises a drilling upper die, the drilling upper die is provided with a spiral curved surface identical to that of the upper spiral die, the spiral curved surface of the drilling upper die is provided with a plurality of raised guide posts, and the positions of the guide posts correspond to the through holes.
3. The integrated device for forming and drilling the continuous spiral baffle without the central tube, as claimed in claim 2, wherein the guide post is stepped, and the end part is provided with a chamfer.
4. A device for forming and drilling a continuous spiral baffle without a central tube as claimed in claim 3, wherein the lower spiral die is provided with positioning posts, positioning sleeves are arranged on two sides of the upper spiral die and the upper die for drilling, and the positioning posts are matched with the positioning sleeves to realize positioning.
5. The integrated device for forming and drilling the continuous spiral baffle without the central tube according to claim 1, further comprising a base, wherein the forming system, the drilling system and the power system are arranged on the base, a hydraulic system and an electric control system are arranged in the base, the hydraulic system is connected with the forming system and the drilling system to achieve lifting of the upper spiral die and the upper spiral die, and the electric control system is electrically connected with the first magnetic attraction ring, the second magnetic attraction ring and the lower spiral die to control generation and elimination of magnetic force.
6. The integrated center-tube-free continuous spiral baffle forming and drilling device as set forth in claim 5, wherein the power system comprises a screw rod and a sliding seat capable of moving linearly on the screw rod, the lower spiral die and the cylinder positioning mechanism are arranged on the sliding seat, the base is provided with a position sensor, and the electric control system receives signals of the position sensor to control start and stop of the power system.
7. The integrated center tube-free continuous helical baffle forming and drilling device as recited in claim 1, wherein the slots and the notches of the inner sector plates are formed by cutting with a laser cutting device.

Description

Forming and drilling integrated device for continuous spiral baffle without central tube Technical Field The application belongs to the field of spiral baffle plate forming, and particularly relates to a device for forming and drilling a continuous spiral baffle plate without a central tube. Background The basic design idea of the spiral baffle heat exchanger is that a spiral baffle structure which is unfolded along the axis of the shell is adopted in the shell side, so that shell side fluid in the heat exchanger flows in a continuous spiral shape. The heat transfer of the shell side is enhanced, the flow dead zone of the shell side fluid is eliminated, the flow pressure drop of the shell side is reduced, and the energy consumption of the heat exchanger is reduced. For example, a first-generation segmented spiral baffle plate is generally formed by connecting a plurality of 1/4 sector plane plates instead of spiral curved surfaces, so that an approximate spiral surface is formed, the processing is simple, the processing technology is mature, but the joint of the sector plates is in a non-smooth acute angle transition, back pressure exists on axially moving fluid, energy loss is caused by sudden steering when the fluid passes, the energy consumption is more serious when the spiral angle is larger, and gaps can be filled only by adding the corner plates when adjacent two sector plates are in space butt joint, so that labor and material are wasted, and the resistance of the fluid is increased. Therefore, the second generation of continuous spiral baffle plates with central pipes is realized, and the heat exchanger with the central pipes is a heat exchanger with a continuous spiral structure, wherein the central pipes are arranged at the central axis positions of the continuous spiral baffle plates, and the spiral baffle plates are arranged around the central pipes. The reason for adding the central tube in the central area of the spiral baffle is that the central axis of the spiral baffle is inclined at an excessive angle, so that the central position of the spiral baffle is difficult to process. The central tube occupies part of the heat exchange tube, reduces the heat exchange area, reduces the utilization rate of the shell space, reduces the heat exchange efficiency, reduces the comprehensive performance of the heat exchanger, and has a certain influence on the stress state. After that, the technical staff research and develop a continuous spiral baffle plate without a central tube, which has ideal spiral curved surface, the spiral line of the central hole of the continuous spiral baffle plate tends to be straight line, shell side medium flows in a spiral plunger flow shape along the continuous spiral path, the flow field is stable, the temperature distribution is uniform, the conditions of flow interruption, flow leakage and the like of the intermittent spiral baffle plate heat exchanger are reduced, the shell side resistance is reduced, and the heat transfer efficiency is improved. The spiral flow path enables the shell side medium to continuously bear force in the same direction, reduces the shell side flow dead zone and the vibration of the heat exchange tube, prevents scaling at the shell side, and prolongs the service cycle of the heat exchanger. The water film produced by steam condensation flows downwards along the upper surface of the spiral baffle plate, impurities can be taken away by the condensate water, the situation of shell side blockage of the heat exchanger can be reduced, the heat exchanger without a central tube and with continuous spiral baffle plate has better heat transfer property and fluidity, the heat exchange efficiency is greatly improved, the shell side resistance and flow dead zone are reduced, and the scale formation rate and vibration are reduced. The comprehensive performance of the prior spiral baffle heat exchanger is optimal. The conventional method for producing the spiral baffle with the central tube is common in a die method, specifically, a notch is cut on a circular flat plate piece of a metal material (an aluminum plate or a steel plate) along the radial direction, the circular flat plate piece is placed between an upper die and a lower die with spiral curved surfaces, a required spiral curved plate is formed by extrusion, a guide rod is arranged in the middle of the lower die, an operator is required to sleeve a flat plate circular ring into the guide rod of the lower die in the actual processing process, the notch position is adjusted and then the upper die is pressed down, a bigger central hole inevitably exists in the pressed spiral blade, the spiral curved surface with an ideal structure cannot be formed, the guide rod is eliminated, the circular flat plate piece cannot be stably positioned on the lower die with the spiral surface, the processing production of the spiral baffle with the ideal structure cannot be realized, the continuous spiral baffle with an in