A positioning device for manufacturing dispersion tubes

Abstract

This utility model discloses a positioning device for manufacturing dispersion tubes, belonging to the field of ion membrane electrolysis technology, aiming to solve the problems of low precision, poor welding efficiency, and low finished product qualification rate in existing manual assembly of dispersion tubes. The device includes a round bar, a square bar, a base, and a positioning pin. The outer diameter of the round bar matches the inner diameter of the main pipe of the dispersion tube, and it has a convex square tenon at the bottom, a platform at the top that matches the outer diameter of the suction tube, and a waist-shaped hole on the side that matches the positioning pin. The square bar has a convex square tenon at the bottom and a U-shaped groove at the top that matches the outer diameter of the suction tube. The base has a square hole that matches the convex square tenons at the bottom of the round and square bars. This utility model has a simple structure, can accurately position the assembly position of the main pipe and the suction tube, improves welding precision and production efficiency, and increases the finished product qualification rate.

Description

Technical Field

[0001] This utility model belongs to the field of ion membrane electrolysis technology. Specifically, it relates to a low-cost assembly and positioning device with a unique design that can significantly improve the manufacturing precision of dispersion tubes and reduce production difficulty. Background Technology

[0002] Ion-exchange membrane electrolysis is a new technology developed on the basis of ion exchange resins. It uses cation exchange membranes to divide a unit electrolytic cell into an anode chamber and a cathode chamber, so that the electrolysis products are separated. It utilizes the selective permeability of ion exchange membranes to anions and cations, allowing ions with one charge to pass through while restricting ions with the opposite charge to pass through, so as to achieve the purpose of concentration, desalination, purification, refining and electrochemical synthesis.

[0003] The dispersion tube is a key piece of equipment that uniformly disperses the liquid transported by the external pipeline into the ion-exchange membrane electrolyzer.

[0004] like Figure 1 As shown, the dispersion tube is assembled from three components: a plug plate 1, a suction pipe 2, and a main pipe 3. The main pipe 3 has a row of small dispersion holes. After the suction pipe 2 is welded to the main pipe 3, the relative positional accuracy between the dispersion holes and the suction pipe 2 is crucial for the dispersion tube to uniformly disperse the liquid into the electrolyzer. Current manufacturing methods involve manual welding by workers followed by secondary adjustments. The disadvantages of this method are long welding time and insufficient assembly precision. Because there are currently no devices or methods to improve manufacturing precision and reduce production difficulty, the finished product qualification rate of the dispersion tube is low, and the production difficulty and cost are high. This also leads to short lifespan, unstable operation, high energy consumption, and low production efficiency of the ion-exchange membrane electrolyzer. Utility Model Content

[0005] The purpose of this utility model is to provide a positioning device and method for manufacturing dispersion tubes. This device can assist workers in assembling and welding the suction tube 2 and the main tube 3, thereby greatly improving the assembly accuracy and work efficiency. It eliminates the traditional step of secondary adjustment after welding, reduces the difficulty and time of welding, and solves the existing technical problems.

[0006] This utility model is achieved through the following technical solution: A positioning device for manufacturing a dispersion tube includes a round bar 4, a square bar 5, a base 6, and a positioning pin 7. The outer diameter of the round bar 4 matches the inner diameter of the main pipe 3. The bottom of the round bar 4 is provided with a convex square tenon, and the upper part is provided with a platform. The width of the platform matches the outer diameter of the suction pipe 2. The side is provided with an oblong hole, the radius of which matches the positioning pin 7. The bottom of the square bar 5 is provided with a convex square tenon, and the upper part is provided with a U-shaped groove. The size of the U-shaped groove matches the outer diameter of the suction pipe 2. The base 6 is provided with a square hole, the size of which matches the convex square tenon at the bottom of the round bar 4 and the square bar 5.

[0007] As a preferred embodiment, the round bar 4 is made of copper.

[0008] As a preferred option, the square bar 5 is made of stainless steel.

[0009] As a preferred option, the base 6 is made of carbon steel.

[0010] The beneficial effects of this utility model are: 1. The relative positional accuracy between the dispersion holes on the main tube 3 and the suction tube 2 is ensured by fixing the oblong hole on the round bar 4 and the positioning pin 7.

[0011] 2. The platform set on the round bar 4 limits the depth of the suction tube 2 into the main tube 3, thus ensuring the total height of the dispersion tube.

[0012] 3. The U-shaped groove on the square rod 5 ensures the perpendicularity of the suction tube 2 and the main tube 3.

[0013] 4. The round bar 4 is made of copper, which can quickly absorb the heat generated during spot welding, prevent thermal deformation, and further ensure the accuracy of assembly welding.

[0014] In summary, this device assists workers in assembling the suction pipe 2 and the main pipe 3. It is easy to operate, has a simple structure, and a reasonable design, which can greatly improve assembly accuracy and work efficiency. It eliminates the need for secondary adjustments after traditional assembly and welding, reducing the difficulty and time of assembly and welding. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the dispersion tube structure; Figure 2 This is a schematic diagram of the cross-section of the dispersion tube AA; Figure 3 This is a three-dimensional structural diagram of the device of this utility model; Figure 4 This is an exploded three-dimensional view of the device of this utility model; Figure 5 This is a three-dimensional assembly diagram of the dispersion tube and the device of this utility model. Figure 6 This is a three-dimensional exploded view of the dispersion tube assembled with the device of this utility model. In the diagram: 1-blocking plate; 2-suction pipe; 3-main pipe; 4-round bar; 5-square bar; 6-base; 7-positioning pin; Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings (Figures 1-6) of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Preparation of the round bar (4): Copper material with a purity of ≥99.5% is selected as raw material and processed into a cylindrical structure by turning process to ensure that the error between its outer diameter and the inner diameter of the main pipe (3) of the dispersion tube to be manufactured is controlled within ±0.05mm (for example, when the inner diameter of the main pipe is 23mm, the outer diameter of the round bar is processed to be 23±0.05mm); a convex square tenon is processed at the bottom of the round bar (4) by milling process, and the cross-sectional dimension error of the square tenon is controlled within ±0.1mm; a rectangular platform is milled at the upper part of the round bar (4) (40-50mm from the bottom), and the width of the platform is adapted to the outer diameter of the suction pipe (2) (for example, the outer diameter of the suction pipe is 12mm). When the platform width is processed to be 12±0.05mm); finally, the waist-shaped hole is processed on the side of the round bar (4) (corresponding to the height position of the small holes of the main pipe (3) by a combination of drilling and milling. The radius of the waist-shaped hole is consistent with the radius of the positioning pin (7), with an error of ≤0.03mm, to ensure that the positioning pin (7) can be smoothly inserted without obvious shaking.

[0018] Preparation of square rod (5): 304 stainless steel is selected as raw material and processed into a rectangular rod structure by milling process. A convex square tenon with the same size as the bottom of the round rod (4) is processed at the bottom of the square rod (5). A U-shaped groove is processed at the top of the square rod (5) (8-12mm from the top) by milling process. The width of the groove opening is adapted to the outer diameter of the suction tube (2) (error ±0.05mm). The groove depth is 1 / 2-2 / 3 of the outer diameter of the suction tube (for example, when the outer diameter of the suction tube is 12mm, the groove depth is 6-10mm) to ensure that the suction tube (2) can be stably limited after being put in.

[0019] Preparation of base (6): Q235 carbon steel is selected as raw material and processed into a rectangular block structure by casting and milling process. Two identical square holes are processed on the upper surface of the base (6). The cross-sectional size of the square holes is matched with the size of the convex square tenon at the bottom of the round bar (4) and square bar (5) (gap ≤ 0.1mm) to ensure that there is no loosening after the square tenon is inserted. The thickness of the base (6) is controlled at 30-50mm to ensure the overall stability of the device.

[0020] Preparation of positioning pin (7): 45 steel is selected as raw material and processed into a cylindrical structure by turning process. Its radius is consistent with the radius of the waist hole of the round bar (4) and its length is 5-8mm larger than the diameter of the round bar (4) to ensure that it can penetrate the main pipe (3) for positioning after insertion.

[0021] Referring to Figure 4 (exploded view of the three-dimensional structure of the device) and Figure 3 (schematic diagram of the three-dimensional structure of the device), align the convex square tenon at the bottom of the round bar (4) with the square hole on the left side of the base (6) and insert it vertically until the bottom of the square tenon fits with the bottom of the square hole; similarly, align the convex square tenon at the bottom of the square bar (5) with the square hole on the right side of the base (6) and insert it to fix it, thus completing the assembly of the positioning device. At this time, both the round bar (4) and the square bar (5) remain vertical and their upper parts are aligned.

[0022] Referring to Figure 6 (exploded view of the assembly of the dispersion tube and device), the main tube (3) to be welded (with pre-set dispersion holes) is placed vertically on the outside of the round bar (4), and slowly lowered until the bottom of the main tube (3) is in contact with the upper surface of the base (6); then rotate the main tube (3) and observe the dispersion holes on the main tube (3) with the naked eye to make the holes completely aligned with the waist-shaped holes on the side of the round bar (4); insert the positioning pin (7) horizontally from one side of the round bar (4) into the waist-shaped hole until the positioning pin (7) penetrates the main tube (3) and extends out from the other side. At this time, the main tube (3) is completely fixed and cannot rotate circumferentially or move axially, ensuring that the position of the dispersion holes remains unchanged during subsequent welding.

[0023] Referring to Figure 5 (Schematic diagram of the assembly of the dispersion tube and the device), place one end of the suction tube (2) (the end to be connected to the main tube (3)) on the platform on the upper part of the round bar (4). At this time, the width of the platform restricts the radial movement of the suction tube (2), and the height of the platform restricts the depth of the suction tube (2) into the main tube (3) (to ensure that the total height of the dispersion tube meets the design requirements); embed the other end of the suction tube (2) into the U-shaped groove of the square bar (5). The groove wall of the U-shaped groove forms left, right and up and down limits on the suction tube (2) to ensure that the suction tube (2) and the main tube (3) remain perpendicular (verticality error ≤ 0.5°).

[0024] After confirming that the positions of the suction pipe (2) and the main pipe (3) are correct, the argon arc welding process is used for assembly welding: first, 3-4 points are evenly spot welded at the connection (each point is spaced 90° apart) to achieve preliminary fixation. During this process, the copper round bar (4) can quickly absorb the heat generated by spot welding to avoid local overheating and thermal deformation of the main pipe (3) and the suction pipe (2); after preliminary fixation, full welding is carried out along the connection. The welding current is controlled at 80-120A and the welding speed is controlled at 5-8mm / s to ensure that the weld is full and free of pores or cracks.

[0025] After the welding is completed, wait for the weld to cool to room temperature (about 20-30 minutes), first pull out the positioning pin (7) in the horizontal direction, and then slowly remove the main pipe (3) (which has been fixed to the suction pipe 2) in the axial direction to complete the separation of the positioning device from the dispersion tube. Finally, according to the conventional process in the field of ion membrane electrolysis, fix the plug plate (1) to the openings at both ends of the main pipe (3) by welding (refer to Figure 1 Schematic diagram of dispersion tube structure) to complete the manufacturing of the entire dispersion tube.

[0026] The apparatus and method of this embodiment are used to manufacture a dispersion tube (main pipe inner diameter 23mm, suction pipe outer diameter 12mm, main pipe length 2336mm), compared with the traditional manual welding method: Assembly accuracy: The relative positional error between the dispersion orifice and the suction tube has been reduced from the traditional ±1.5mm to ±0.3mm, and the perpendicularity error between the suction tube and the main tube has been reduced from the traditional ±2° to ±0.5°; Production efficiency: The welding time for a single distribution tube is reduced from the traditional 40-50 minutes to 15-20 minutes, eliminating the need for secondary adjustment steps; Finished product qualification rate: The finished product qualification rate of dispersion tubes has been increased from the traditional 65%-75% to over 95%. After being assembled into the ion membrane electrolyzer, the electrolyzer life is extended by 1-2 years, the operating energy consumption is reduced by 8%-12%, and the production efficiency is increased by 10%-15%.

[0027] In summary, the device and method of this invention can effectively solve the pain points of existing dispersion tube manufacturing and have high practical value and promotion prospects in the field of ion membrane electrolysis technology.

Claims

1. A positioning device for manufacturing dispersion tubes, characterized in that: It includes a round bar (4), a square bar (5), a base (6), and a positioning pin (7); the outer diameter of the round bar (4) matches the inner diameter of the main pipe (3) of the dispersion tube, the bottom of the round bar (4) is provided with a convex square tenon, and the upper part is provided with a platform, the width of which matches the outer diameter of the suction pipe (2) of the dispersion tube, and the side of the round bar (4) is provided with a waist-shaped hole, the radius of which matches the positioning pin (7); the bottom of the square bar (5) is provided with a convex square tenon, and the upper part is provided with a U-shaped groove, the size of which matches the outer diameter of the suction pipe (2); the base (6) is provided with a square hole, the size of which matches the convex square tenon at the bottom of the round bar (4) and the square bar (5).

2. The positioning device for manufacturing dispersion tubes according to claim 1, characterized in that: The material of the round bar (4) is copper.

3. The positioning device for manufacturing dispersion tubes according to claim 1, characterized in that: The square bar (5) is made of stainless steel.

4. The positioning device for manufacturing dispersion tubes according to claim 1, characterized in that: The base (6) is made of carbon steel.

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