CN111496033A - Seawater desalination high-pressure elbow angle fine adjustment device and working method - Google Patents

Abstract

The invention relates to the technical field of seawater desalination equipment, in particular to a seawater desalination high-pressure elbow angle fine adjustment device and a working method. The device comprises a workbench; one end of the workbench is provided with a working part, and the other end of the workbench is provided with a driving part; the working component comprises a fixing module and a driving module; the high-pressure bent pipe comprises an arc section to be adjusted and straight pipe sections on two sides of the arc section; the fixed module is fixedly connected with the workbench, an extension plate is fixedly connected below the driving module, the end part of the extension plate is rotatably connected with the workbench, and an arc-shaped slideway for the rotation of the driving module and the extension plate is arranged on the workbench; one side of the high-pressure elbow pipe is provided with a straight pipe section which is arranged on the fixed module, and the other side of the high-pressure elbow pipe is provided with a straight pipe section which is arranged on the driving module; the driving module drives the upper straight pipe section to rotate at a preset angle under the action of the driving part. The invention can overcome the defect that the angle of the bent pipe is too large or too small and cannot be finely adjusted, realize the synchronous measurement of the angle of the bent pipe and eliminate the influence of residual stress on the strength of the high-pressure pipe.

Description

A seawater desalination high-pressure elbow angle fine-tuning device and working method

technical field

The invention relates to the technical field of seawater desalination equipment, in particular to a device and a working method for fine-tuning the angle of a high-pressure elbow of seawater desalination.

Background technique

At present, the shortage of freshwater resources is becoming more and more serious, and the total scale of seawater desalination in the country has reached more than 2.2 million tons per day. At present, the seawater desalination technologies widely used in industry are mainly distillation and reverse osmosis. Titanium alloys with high strength, good corrosion resistance, low density and light weight are generally used for high-pressure elbows in reverse osmosis seawater desalination equipment.

The preparation method of titanium alloy high-pressure elbow includes welding and elbow forming; the application of welded high-pressure elbow is limited in long time, poor appearance, and welding defects. The elbow forming technology has short working hours, good appearance and extremely high forming efficiency. It is the most popular way to manufacture high-pressure elbows and an important part of the rapid assembly technology of seawater desalination equipment. However, due to the springback phenomenon in the bending technology, the springback leads to a deviation between the bending angle and the design angle, and the existence of the dimensional tolerance and composition difference of the metal tube, so that the angle after the bending cannot be precisely controlled, and the design size cannot be achieved. The scrap rate is high and cannot be widely used, especially the titanium alloy has high strength, poor ductility, and the springback phenomenon is more serious. In addition, the titanium alloy high-pressure pipe has residual stress after the pipe bend, which will affect the strength of the pipe bend after the pipe bend, the process of removing the residual stress increases, the manufacturing cost of the pipe bend is increased, and the process is complicated. These defects will affect the normal use of seawater desalination equipment and urgently need to be improved.

SUMMARY OF THE INVENTION

In order to solve the technical problems existing in the known technology, the present invention provides a device and a working method for fine-tuning the angle of a high-pressure elbow of seawater desalination. Measure and eliminate the influence of residual stress on the strength of high pressure pipes.

In order to achieve the above object, the present invention adopts the following technical solutions:

A seawater desalination high-pressure bend angle fine-tuning device, which comprises a workbench; one end of the workbench is provided with a working part for fine-tuning the bend angle, and the other end is provided with a driving part for providing power for the working part; the working part It includes a fixed module and a drive module vertically installed on the workbench; the high-pressure elbow includes a circular arc segment to be adjusted and straight pipe segments on both sides of the circular arc segment; the fixed module is fixedly connected to the workbench, and the lower part of the drive module is fixedly connected with a an extension plate, the end of the extension plate is rotatably connected to the worktable, and the worktable is provided with an arc-shaped slideway for the rotation of the drive module and the extension plate; one side of the straight pipe section of the high-pressure elbow is installed on the fixed module, and the other The side straight pipe section is installed on the driving module; the driving module drives the upper straight pipe section to rotate at a predetermined angle under the action of the driving component.

Further, the driving component includes a rotating shaft and a matching worm gear; a motor and a reducer that drive the worm and the worm gear to rotate are provided on the outside of the worktable; one end of the rotating shaft passes through the worktable and is fixedly connected to the extension plate, The other end forms a rotating pair with the worm wheel; the motor drives the reducer, the worm, the worm wheel and the transmission shaft to rotate in sequence, and the torque is transmitted to the drive module to drive the straight pipe section to fine-tune the angle.

Further, an angle scale for displaying the fine-tuning angle of the high-pressure elbow is also provided on the workbench; the angle scale is arranged below the arc segment.

Further, the angle scale includes a fixed ruler and a rotating ruler; one end of the fixed ruler and the rotating ruler coincides and faces the center of the arc segment; wherein the other end of the fixed ruler is fixed on the end of the fixed module so as to be connected with the fixed module. The straight pipe section is axially parallel, and the other end of the rotating ruler is fixed to the end of the drive module so as to be axially parallel to the straight pipe section on the drive module.

Further, the worktable is also provided with an inner shaping structure and an outer shaping structure; the inner shaping structure includes a ball slideway on the worktable facing the inner center of the arc segment, and sliding with the ball slideway. The slider, and the inner shaping die set on the slider; the outer circumference of the inner shaping die is a curved surface contacting the inner side surface of the arc segment.

Further, the outer sizing structure includes a second ball slideway and an outer sizing die set on the outer side of the arc segment; the second ball slidway is arranged facing the center of the arc end and is slidably matched with the outer sizing die, and the outer sizing die is set. There is an outer shaping operation part for pushing the outer shaping die to slide; the outer shaping die is provided with two curved surfaces facing the center of the arc segment and in contact with the outer surface of the arc segment.

Further, the center radius of the curved surface one is smaller than the bending radius of the arc segment; the center radius of the curved surface two is slightly larger than the bending radius of the elbow.

Further, the outer side of the arc segment is wrapped with an eddy current heating coil controlled by a frequency converter; and a temperature measuring device facing the eddy current heating coil is also provided on the workbench.

Further, the straight pipe section is movably connected to the fixing module and the driving module through the upper holding mold and the lower holding mold.

Further, the working method of the above-mentioned seawater desalination high-pressure elbow angle fine-tuning device specifically includes the following steps:

S1. Place the straight pipe sections of the high-pressure elbow on the fixing module and the drive module respectively and fix them with the upper and lower holding dies. The center of the arc section of the high-pressure elbow is facing the inner and outer shaping structures;

S2. The eddy current heating coil is controlled by the frequency converter to heat the bent pipe, and when the temperature measuring device monitors the eddy current heating coil to be heated to the set temperature, the eddy current heating coil is folded to the side of the straight pipe section;

S3. The inner and outer stereotypes are closely attached to the arc segment;

S4. Start the motor to rotate the drive module. When the angle of the elbow is synchronously measured by the angle ruler, when the angle of the elbow is 90°, stop the motor rotation and keep the elbow pressure for a period of time before unloading; observe the reading of the angle scale, and determine the secondary value by analyzing the angle rebound value. Fine-tune the value of the angle, and finally complete the fine-tuning of the 90° angle.

The advantages and positive effects that the present invention has are:

1. The present invention is to place the elbow on the fixed module, and to increase or decrease the elbow angle through the power-driven elbow module to improve bidirectionally. Lifting; when the elbow angle is between 85° and 95°, the angle can be adjusted to 90°;

2. The present invention utilizes the inner and outer shaping dies to ensure the appearance of the high-pressure pipeline, to ensure that the elbow is subjected to uniform force during the fine-tuning of the angle, to restrain the deformation of the section of the elbow during the fine-tuning of the angle, and to reduce the product rejection rate;

3. The change of the angle of the elbow is monitored by the angle scale that rotates synchronously with the drive module, and the measurement process is integrated into the angle fine-tuning, which simplifies the production process;

4. Through the eddy current warming unit, real-time temperature monitoring and frequency and current adjustment are performed to improve the ductility of the pipeline and eliminate residual stress;

5. The upper and lower holding dies on the fixed module and the driving module can be replaced and the position can be adjusted, which can adapt to different specifications of elbows and obtain different torques.

Description of drawings:

1 is a three-dimensional view of the non-working state (including high-pressure pipeline) of the angle fine-tuning device in the present invention;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is the bottom view of Fig. 2;

Fig. 4 is the top view of the working state of the angle fine-tuning device in the present invention;

5 is a top view of the working state of the angle fine-tuning device in the present invention (excluding high-pressure pipelines);

FIG. 6 is a three-dimensional view of FIG. 5 .

Among them: 1. Workbench; 2. Fixed module; 21. Upper holding mold; 22. Lower holding mold; 23. Installation slot; 24. Tapped hole; 3. Drive module; 31. Extension plate; 32. Arc slide ;4, rotating shaft; 51, worm gear; 52, worm; 6, motor; 7, angle scale; 71, fixed ruler; 72, rotating ruler; Block; 83. Internal shaping mold; 84. Surface one; 85. Internal shaping operation part; 9. External shaping structure; 91. Ball slide two; 92. External shaping die; 93. External shaping operation part; 94. Surface two ; 10, eddy current heating coil; 11, frequency converter; 12, temperature measuring equipment; 13, high pressure elbow; 131, straight pipe section; 132, arc section.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 work; all belong to the protection scope of the present invention.

As shown in Figures 1-6, the present invention provides a device and a working method for fine-tuning the angle of a high-pressure elbow 13 for seawater desalination. The device includes a workbench 1; One end is provided with a drive part that provides power for the working part; the working part includes a fixed module 2 and a drive module 3 vertically installed on the workbench 1; the high-pressure elbow 13 includes an arc segment 132 and an arc segment 132 to be adjusted Straight pipe sections 131 on both sides; the fixed module 2 is fixedly connected to the workbench 1, and an extension plate 31 is fixedly connected below the drive module 3, the end of the extension plate 31 is rotatably connected to the workbench 1, and the workbench 1 is provided with a supply The arc slide 32 for the rotation of the drive module 3 and the extension plate 31; the straight pipe section 131 on one side of the high-pressure elbow 13 is installed on the fixed module 2, and the straight pipe section 131 on the other side is installed on the drive module 3; the drive module 3 is driving Under the action of the component, the upper straight pipe section 131 is driven to rotate at a predetermined angle, so as to achieve the effect of fine-tuning the curved pipe. Specifically, the driving component includes a rotating shaft 4, a matching worm wheel 51, and a worm 52; the outside of the worktable 1 is provided with a motor 6 and a reducer that drive the worm 52 and the worm wheel 51 to rotate; one end of the rotating shaft 4 passes through The table 1 is fixedly connected with the extension plate 31, and the other end forms a rotating pair with the worm wheel 51; then the motor 6 drives the reducer, the worm 52, the worm wheel 51 and the transmission shaft to rotate in turn, and the torque is transmitted to the drive On the module 3, and drive the straight pipe section 131 of one side of the high-pressure elbow 13 to fine-tune the angle, wherein the angle can be increased or decreased according to the actual situation.

Preferably, the workbench 1 is also provided with an angle scale 7 for displaying the fine-tuning angle of the high-pressure elbow 13; the angle scale 7 is arranged on the workbench 1 below the arc segment 132; the angle scale 7 Including a fixed ruler 71 and a rotating ruler 72; one end of the fixed ruler 71 and the rotating ruler 72 coincide and face the center of the arc segment 132; the other end of the fixed ruler 71 is fixed to the end of the fixed module 2 so as to be connected with the fixed module 2 The straight pipe section 131 above is axially parallel, and the other end of the rotating ruler 72 is fixed to the end of the drive module 3 so as to be axially parallel to the straight pipe section 131 on the drive module 3 . In this way, as long as the driving module 3 produces an angle change, the rotary ruler 72 can be driven to rotate, and the reading on the angle scale 7 is the angle of the high-pressure elbow 13 .

In order to eliminate the change of the bending radius caused by the rebound of the high-pressure elbow 13 , the workbench 1 is also provided with an inner shaping structure 8 and an outer shaping structure 9 ; For the ball slideway 81 at the inner center of the arc segment 132, the slider 82 slidingly matched with the ball slideway, and the inner shaping die 83 set on the slider 82; The curved surface one 84 contacted by the inner side of the arc segment 132; the center radius of the curved surface one 84 is slightly smaller than the bending radius of the arc segment 132; in addition, the slider 82 is provided with an internal shaping operation for pushing the internal shaping structure 8 to slide part 85; the outer shaping structure 9 includes a ball slideway 91 and an outer shaping die 92 arranged on the outer side of the arc segment 132; the ball slideway two 91 is arranged opposite the center of the arc end and is connected with the outer shaping die 92 sliding fit, the outer sizing die 92 is provided with an outer sizing operation part 93 for pushing the outer sizing die 92 to slide; 94, the center radius of curved surface two 94 is slightly larger than the bending radius of the elbow. The inner shaping structure 8 and the outer shaping structure 9 can work independently or together according to the situation. The center radius of the curved surface of the inner shaping die 83 and the outer shaping die 92 can be obtained through the mold test, and the two can be clamped when the angle of the elbow is fine-tuned. Bending, to ensure that the bend is evenly stressed when the angle is fine-tuned, and the section deformation of the bend is suppressed when the angle is fine-tuned.

Preferably, in order to improve the ductility of the arc segment 132 and improve the quality of the angle fine-tuning of the arc segment 132, according to the different materials of the high-pressure elbow 13, the outer side of the arc segment 132 is wrapped with an eddy current heating coil controlled by the frequency converter 11. 10; The eddy current heating coil 10 can increase the temperature of the high pressure elbow 13, eliminate the residual stress inside the elbow, and improve the performance of the elbow; move between. The workbench 1 is also provided with a temperature measuring device 12 facing the eddy current heating coil 10. The temperature increasing speed of the eddy current heating coil 10 is monitored by the temperature measuring device 12, and the temperature increasing rate of the eddy current heating coil 10 is affected by the frequency of the connected power supply and the temperature. Current size control.

Preferably, the straight pipe section 131 of the elbow is installed on the fixing module 2 and the driving module 3 through the upper holding mold 21 and the lower holding mold 22; the fixed module 2 is a square block, and there is a mounting device at the center of the upper end of the block. Slot 23; the lower holding mold 22 is connected to the mounting groove 23; the upper surface of the lower holding mold 22 is provided with an upper arc-shaped groove that is buckled with the outer wall of the straight pipe section 131, The surface is provided with upper and lower arc grooves that are buckled with the outer wall of the straight pipe section 131; the fixing module 2 is provided with a plurality of threaded holes 24, and the upper holding mold 21 and the lower holding mold 22 are screwed on the fixed module 2. Select different positions on the module 2 to obtain different torques; the structure of the drive module 3 and the fixing form of the elbow are the same as the fixed module 2, and will not be repeated here; in addition, the fixed module 2 and the drive module 3 can be specifications are replaced.

After a titanium alloy high-pressure pipe is bent by a pipe bender, the bending angle is 91°. At this time, the device of this patent needs to be used to fine-tune the angle to 90°.

Taking the elbow as an example, the present invention can also disclose the working method of the above-mentioned seawater desalination high-pressure elbow 13 angle fine-tuning device, which specifically includes the following steps:

S1, place the straight pipe section 131 of the high-pressure elbow 13 on the fixing module 2 and the driving module 3 respectively and fix it with the upper and lower holding molds 22, and the center of the arc section 132 of the high-pressure elbow 13 is facing the inner and outer shaping structures 9;

S2. The eddy current heating coil is controlled by the frequency converter 11 to heat the elbow, and the temperature measuring device 12 monitors the eddy current heating coil to heat to 200-300°C. The temperature at this time can not only increase the ductility of the elbow material, but also prevent Change the internal structure of the titanium alloy; the eddy current heating coil is heated and folded to the side of the straight pipe section 131;

S3, the inner and outer shaping molds 92 are close to the arc segment 132;

S4, start the motor 6 to make the drive module 3 rotate, when the angle ruler synchronously measures the angle of the elbow to be 90°, stop the rotation of the motor 6 and unload the elbow after maintaining the pressure for a period of time; observe the reading of the angle scale 7, and analyze the angle rebound value by analyzing , determine the secondary angle fine-tuning value, and finally complete the 90° angle fine-tuning work.

The embodiments of the present invention have been described in detail above, but the content described above is only a preferred embodiment of the present invention, and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope of the patent of the present invention.

Claims (10)

1. A seawater desalination high-pressure bend angle fine-tuning device, the device comprises a workbench; it is characterized in that: one end of the workbench is provided with a working part for fine-tuning the bend angle, and the other end is provided with a drive that provides power for the working part The working part includes a fixed module and a drive module vertically installed on the workbench; the high-pressure elbow includes a circular arc segment to be adjusted and straight pipe segments on both sides of the circular arc segment; the fixed module is fixedly connected to the workbench, An extension plate is fixedly connected below the drive module, the end of the extension plate is rotatably connected with the worktable, and the worktable is provided with an arc-shaped slideway for the rotation of the drive module and the extension plate; one side of the straight pipe section of the high-pressure elbow is installed in On the fixing module, the straight pipe section on the other side is installed on the driving module; the driving module drives the straight pipe section above to rotate at a predetermined angle under the action of the driving component. 2. The seawater desalination high-pressure bend angle fine-tuning device as claimed in claim 1, characterized in that: the drive component comprises a rotating shaft and a matching worm gear; the outside of the worktable is provided with a motor and a decelerator that drive the worm and the worm gear to rotate. One end of the rotating shaft is fixedly connected to the extension plate through the worktable, and the other end forms a rotating pair with the worm wheel; the motor drives the reducer, the worm, the worm wheel and the transmission shaft to rotate in turn, and the torque is transmitted. Go to the drive module to drive the straight pipe section to fine-tune the angle. 3. The device for fine-tuning the angle of high-pressure elbows in seawater desalination according to claim 2, characterized in that: an angle scale for displaying the fine-tuning angle of high-pressure elbows is also provided on the workbench; Below the arc segment. 4. The seawater desalination high-pressure elbow angle fine-tuning device as claimed in claim 3, wherein the angle scale comprises a fixed ruler and a rotating ruler; one end of the fixed ruler and the rotating ruler coincides and faces the arc segment The other end of the fixed ruler is fixed to the end of the fixed module so as to be axially parallel to the straight pipe section on the fixed module, and the other end of the rotating ruler is fixed to the end of the drive module to be axially parallel to the straight pipe section on the drive module. 5. The device for fine-tuning the angle of high-pressure elbows in seawater desalination according to claim 1, characterized in that: the workbench is also provided with an inner shaping structure and an outer shaping structure facing the center of the arc segment; the inner shaping structure It includes a ball slideway 1 arranged on the inner side of the circular arc segment, a slider matched with the ball slideway sliding 1, and an inner shaping die set on the slider; the outer periphery of the inner shaping die is in contact with the inner surface of the arc segment. surface one. 6 . The device for fine-tuning the angle of a high-pressure elbow in seawater desalination according to claim 5 , wherein the outer shaping structure comprises a second ball slideway and an outer shaping die set on the outer side of the arc segment; the second ball slideway The outer sizing die is slidably matched with the outer sizing die, and the outer sizing die is provided with an outer sizing operation part for pushing the outer sizing die to slide; 7 . The device for fine-tuning the angle of a high-pressure bend pipe for seawater desalination according to claim 6 , wherein the central radius of the curved surface 1 is smaller than the bending radius of the arc segment; the central radius of the curved surface 2 is slightly larger than the bending radius of the curved pipe. 8 . 8. The seawater desalination high-pressure elbow angle fine-tuning device according to claim 1, wherein the outer side of the arc segment is wrapped with an eddy current heating coil controlled by a frequency converter; Temperature measurement equipment for temperature coils. 9 . The device for fine-tuning the angle of a high-pressure elbow in seawater desalination according to claim 1 , wherein the straight pipe section is movably connected to the fixed module and the driving module through the upper and lower holding moulds. 10 . 10. The working method of the seawater desalination high-pressure elbow angle fine-tuning device according to any one of claims 1 to 9, characterized in that: it specifically comprises the following steps: S1. Place the straight pipe sections of the high-pressure elbow on the fixing module and the drive module respectively and fix them with the upper and lower holding dies. The center of the arc section of the high-pressure elbow is facing the inner and outer shaping structures; S2. The eddy current heating coil is controlled by the frequency converter to heat the bent pipe, and when the temperature measuring device monitors the eddy current heating coil to be heated to the set temperature, the eddy current heating coil is folded to the side of the straight pipe section; S3. The inner and outer stereotypes are closely attached to the arc segment; S4. Start the motor to rotate the drive module. When the angle of the elbow is synchronously measured by the angle ruler, when the angle of the elbow is 90°, stop the motor rotation and keep the elbow pressure for a period of time before unloading; observe the reading of the angle scale, and determine the secondary value by analyzing the angle rebound value. Fine-tune the value of the angle, and finally complete the fine-tuning of the 90° angle.

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