A tube panel misalignment assembly welding positioning device

Abstract

The utility model discloses a kind of tube screen misplacement assembly welding positioning device, comprising: upper positioning tube: bottom is equipped with a row of counterbore blind hole; Right end is equipped with ladder shaft and the plastic expansion sleeve mounted on it, for friction connection pipe port;Clamping screw: head outer thread is connected with the thread of counterbore blind hole, bottom is hemispherical;Lower positioning tube: top is equipped with a row of blind hole, hole position and counterbore blind hole upper and lower correspondence;Blind hole bottom is equipped with magnetic attraction iron ring;Right end is equipped with ladder shaft and the plastic expansion sleeve mounted on it, for friction connection pipe port;Wherein, upper positioning tube and lower positioning tube are connected by clamping screw, clamping screw cylindrical portion inserts into blind hole and slip contact, misaligned mouth inclination angle adjustment range is 0 °~70 °.The utility model can significantly improve production efficiency and reduce cost, realize the accurate assembly welding of end shape, and support the rapid manufacturing of boiler tube screen assembly.

Description

Technical Field

[0001] This utility model relates to a positioning device for misaligned welding of pipe screens. Background Technology

[0002] With the large-scale production and manufacturing of high-parameter boilers such as ultra-supercritical, supercritical, and subcritical boilers, there are a large number of tube panel components with uneven / irregular ends in these boilers.

[0003] Example 1, such as Figure 1 As shown, a tube screen product 0-1 with a "protruding sharp angle" structure at the end is described. The outer diameter of the tubes in the tube screen is Ф1, with a diameter range of 15mm to 100mm. The width of the flat steel embedded between the tube screen products is L, with a width range of 5mm to 60mm. The inclination angle between the upper end of the tube screen and the vertical line is B, with an inclination angle range of 0° to 60°; the inclination angle between the lower end of the tube screen and the vertical line is A, with an inclination angle range of 0° to 70°.

[0004] like Figure 2 As shown, for this type of tube screen product, if conventional tube screen manufacturing processes are used, the tube screens with flush ends are generally first assembled and welded together. Then, according to the actual shape of the tube screen (with protruding sharp corners), end allowance lines are drawn (marked as 0-1-1, using cross lines for identification). After that, the tube ends and flat steel allowances are removed, and finally, the tube ends are re-machined to the required dimensions. Figure 1 The structural form in the middle.

[0005] Example 2, such as Figure 3 As shown, a tube screen product 0-2 has a "recessed pointed corner" structure at the end. The outer diameter of the tubes in the tube screen is Ф1, with a diameter range of 15mm to 100mm. The width of the flat steel embedded between the tube screen products is L, with a width range of 5mm to 60mm. The inclination angle between the upper end of the tube screen and the vertical line is D, with an inclination angle range of 0° to 70°; the inclination angle between the lower end of the tube screen and the horizontal line is C, with an inclination angle range of 0° to 60°.

[0006] like Figure 4 As shown, for this type of tube screen product, the conventional tube screen manufacturing process typically involves first assembling and welding the tube screens with flush ends. Then, according to the actual shape of the tube screen (concave and pointed corners), end allowance lines are marked (marked as 0-2-1, using cross lines). Afterwards, the tube ends and flat steel allowances are removed, and finally, the tube ends are re-machined to... Figure 3 Structural form.

[0007] If the above two manufacturing processes are still used when processing the existing tube shield products (Examples 1 and 2), the utilization rate of raw material tubes will be low and the material loss will be large. Secondly, the tube processing process is complex, the manufacturing cycle of tube shield products is long, and the production efficiency is low, which is not conducive to the promotion in the production workshop.

[0008] In existing technologies, tube screen assemblies (such as those in ultra-supercritical, supercritical, or subcritical boilers) often have uneven ends (e.g., "protruding sharp corners" or "recessed sharp corners"). When manufacturing these assemblies, a tube screen with even ends must first be welded together, and then the excess material from the tube ends and flat steel is removed according to the actual shape (e.g., ...). Figure 1-4 (As shown). This leads to the following core issues:

[0009] Material waste and high costs: The cutting operation generates excess waste, increasing raw material consumption and manufacturing costs.

[0010] Low production efficiency: The processes of removing excess material and reprocessing extend the manufacturing cycle (such as scribing, cutting, and end treatment), which is not conducive to large-scale production.

[0011] Process complexity: Existing methods cannot directly weld the required misalignment angles (such as A°, B°, C°, D°), and subsequent adjustments are required, which limits the flexibility and accuracy of the design. Utility Model Content

[0012] The technical problem to be solved by this utility model is to provide a tube screen misalignment welding positioning device to directly realize misalignment welding at the end of the tube screen, eliminate the excess material removal step, thereby improving production efficiency, reducing manufacturing costs, and adapting to various misalignment structures (such as tube screens with "protruding sharp corners" or "recessed sharp corners" with different tilt angles).

[0013] A pipe screen misalignment welding positioning device includes:

[0014] Upper positioning tube: outer diameter Φ1, 15mm~100mm, bottom has a row of countersunk blind screw holes, number of holes 8, pitch S is 10mm~100mm; right end has a stepped shaft and a plastic expansion sleeve installed on it for friction connection of the tube end;

[0015] Snap-in screws: The length satisfies L2 = L + L1, where L is the width of the flat steel, 5mm to 60mm; L1 is the depth of the blind hole, the external thread of the head is connected to the thread of the countersunk blind screw hole, and the bottom is hemispherical.

[0016] Lower positioning tube: outer diameter Φ1, 15mm~100mm, top has a row of blind holes, number of holes 8, pitch S is 10mm~100mm, hole position corresponds to the countersunk blind screw hole; bottom of blind hole is equipped with magnetic attracting ring 1-3-5, depth L1; right end is equipped with stepped shaft and plastic expansion sleeve installed on it for friction connection of tube end;

[0017] The upper positioning tube and the lower positioning tube are connected by a snap-fit ​​screw. The cylindrical part of the snap-fit ​​screw is inserted into the blind hole and slides in contact. The misalignment tilt angle can be adjusted from 0° to 70°.

[0018] Preferably, the plastic expansion sleeve is inserted into the pipe port to fix the pipe position by friction.

[0019] Preferably, the bottom hemisphere of the locking screw 1-2 contacts the magnetic attracting ring 1-3-5 to enhance connection stability.

[0020] This utility model also provides a method for staggered welding and splicing of tube screens, used for tube screen products with "protruding sharp corners" at the ends, including:

[0021] Step 1: Prepare the tube panel misalignment welding positioning device. Select the corresponding parts according to the tube outer diameter Φ1, inner diameter, pitch, flat steel width L, and blind hole depth L1 of the tube panel product, and assemble the plastic expansion sleeve and the locking screw.

[0022] Step 2: Adjust the misalignment angle:

[0023] If the tilt angle of the lower end of the tube screen is A° (0°~70°), the upper positioning tube protrudes beyond the port of the lower positioning tube and is adjusted to A° misalignment.

[0024] If the tilt angle of the upper end of the tube screen is B° (0°~60°), retract the upper positioning tube (1-1) into the port of the lower positioning tube and adjust it to B° misalignment;

[0025] Insert the plastic expansion sleeve into the pipe end to secure it;

[0026] Step 3: Weld the two sets of pipes to the flat steel;

[0027] Step 4: Repeat steps 2-3 to weld together 4 tubes with a uniform staggered angle;

[0028] Step 5: Combine one set of A° staggered tube screens with one set of B° staggered tube screens, and weld flat steel at the B° angle to form a complete "protruding sharp corner" tube screen.

[0029] Preferably, the misalignment adjustment in step 2 is achieved by misaligning the left ends of the upper / lower positioning tubes, and the plastic expansion sleeve is frictionally connected to the tube end.

[0030] The preferred assembly welding process involves welding two groups first, and then expanding to four or eight groups.

[0031] This utility model also provides a method for staggered welding and splicing of tube screens, used for tube screen products with a "recessed sharp corner" structure at the ends, including:

[0032] Step 1: Prepare the tube panel misalignment welding positioning device. Select the corresponding parts according to the tube outer diameter Φ1, inner diameter, pitch, flat steel width L, and blind hole depth L1 of the tube panel product, and assemble the plastic expansion sleeve and the locking screw.

[0033] Step 2: Adjust the misalignment angle:

[0034] If the tilt angle of the lower end of the tube screen is D° (0°~70°), make the upper positioning tube protrude from the port of the lower positioning tube and adjust it to D° misalignment;

[0035] If the tilt angle of the upper end of the tube screen is C° (0°~60°), retract the upper positioning tube 1-1 into the port of the lower positioning tube and adjust it to C° misalignment;

[0036] Insert the plastic expansion sleeve into the pipe end to secure it;

[0037] Step 3: Weld the two sets of pipes to the flat steel;

[0038] Step 4: Repeat steps 2-3 to weld together 4 tubes with a uniform staggered angle;

[0039] Step 5: Combine one set of C° misaligned tube screens with one set of D° misaligned tube screens, and weld flat steel at the C° angle to form a complete "concave sharp corner" tube screen.

[0040] Preferably, the misalignment adjustment in step 2 is achieved by misaligning the left ends of the upper / lower positioning tubes, and the plastic expansion sleeve is frictionally connected to the tube end.

[0041] Preferably, the welding process includes welding two groups first, and then expanding to four or seven groups.

[0042] This utility model introduces a method and positioning device for staggered welding of pipe screens, which brings significant benefits. These benefits directly stem from the implementation method and device design (such as...). Figure 5-18 (The assembly welding steps and device structure shown)

[0043] High-efficiency production: Positioning devices (such as upper positioning tubes, locking screws, and lower positioning tubes) allow direct adjustment and fixation of the misalignment angle of the tubes (such as A°, B°, C°, D°), without the need to remove excess material (such as...). Figure 9-18 As shown in the figure, it significantly shortens the manufacturing cycle (for example, reducing the welding steps by more than 50%) and improves production efficiency.

[0044] Cost reduction: Eliminating material cutting steps reduces waste (minimizing flat steel and pipe allowances), lowering raw material and processing costs; simultaneously, the device has a simple structure (e.g., plastic expansion sleeve, magnetic attractor ring design), making it easy to manufacture and maintain. High versatility: The device and method are applicable to various pipe screen specifications (pipe outer diameter Φ1: 15mm~100mm, flat steel width L:

[0045] With a range of 5mm to 60mm and tilt angles (e.g., 0° to 70°), it can seamlessly handle structures with "protruding sharp corners" and "recessed sharp corners" (e.g., 5mm to 60mm). Figure 1 and Figure 3 This improves process flexibility.

[0046] Easy to promote: The operation steps are simplified (such as adjusting the misalignment by using the L2=L+L1 length logic of the clamping screw), reducing the reliance on professional skills and facilitating large-scale application in workshop environments.

[0047] In summary, the beneficial effects of this utility model include: significantly improving production efficiency and reducing costs, achieving precise welding of end shapes, and supporting rapid manufacturing of boiler tube panel assemblies. Attached Figure Description

[0048] Figure 1 A type of tube screen product with a "protruding sharp corner" structure at the end in the prior art;

[0049] Figure 2 The condition of the left end allowance in a tube screen product with a "protruding sharp corner" structure in the prior art;

[0050] Figure 3 A type of tube screen product with a "recessed sharp corner" structure at the end in the existing technology;

[0051] Figure 4 The condition of the left end allowance in a tube screen product with a "protruding sharp corner" structure in the prior art;

[0052] Figures 5-8 : Overall structural diagram and detailed drawings of parts of a pipe screen misalignment welding positioning device;

[0053] Figure 5 : The overall main view of the positioning device shows the complete assembly structure of the upper positioning tube 1-1, the locking screw 1-2, and the lower positioning tube 1-3;

[0054] Figure 6 : Detailed structural drawing of upper positioning tube 1-1, close-up of countersunk blind screw hole 1-1-2 pitch (S) and plastic expansion sleeve 1-1-4 installation details;

[0055] Figure 7 Detailed structural diagram of locking screws 1-2;

[0056] Figure 8 : Detailed cross-sectional view of the lower positioning tube, revealing the connection logic of the magnetic attracting ring 1-3-5 and the locking screw 1-2 pin inside the blind hole 1-3-2;

[0057] Figures 9-13 : Welding and splicing operation steps for a tube screen product with a "protruding sharp corner" structure at the end;

[0058] Figure 9 The initial assembly drawing of the sharp-corner tube screen assembly shows the initial docking status of the positioning device (upper positioning tube 1-1, lower positioning tube 1-3) with the tube screen product.

[0059] Figure 10 The diagram illustrates the adjustment of the misalignment of the upper positioning tube 1-1 protruding from the port of the lower positioning tube 1-3, thus achieving the adjustment of the misalignment of the lower end of the tube screen at an A° tilt angle (0°~70°).

[0060] Figure 11 The diagram highlights the welding process of two pipe sections to a flat steel bar after the A° misalignment adjustment is completed.

[0061] Figure 12 The diagram highlights the adjustment of the B° misalignment in the welding of the pointed-corner tube screen, demonstrating how the upper positioning tube 1-1 is recessed into the port of the lower positioning tube 1-3 to achieve the adjustment of the B° tilt angle (0°~60°) at the upper end of the tube screen.

[0062] Figure 13 The diagram shows the complete "protruding corner" structure of the 8-piece assembly of the A° and B° misaligned tube screen components after welding.

[0063] Figures 14-18 : Welding and splicing operation steps for a tube screen product with a "recessed sharp corner" structure at the end;

[0064] Figure 14 : Initial assembly drawing of the concave-corner tube screen assembly - initial docking of the positioning device (upper positioning tube 1-1, lower positioning tube 1-3) with the concave-corner tube screen 0-2;

[0065] Figure 15 : Diagram of D° misalignment adjustment for concave-angle tube screen assembly welding - upper positioning tube 1-1 protrudes beyond the port of lower positioning tube 1-3, realizing misalignment adjustment of the lower end of the tube screen at the D° tilt angle (0°~70°);

[0066] Figure 16 : Diagram of C° misalignment adjustment for concave-angled tube screen assembly welding - The upper positioning tube 1-1 is recessed into the port of the lower positioning tube 1-3 to achieve misalignment adjustment of the upper end of the tube screen at the C° tilt angle (0°~60°);

[0067] Figure 17 : Welding process diagram of 3-piece set of concave-angled pipe screen - after completing the C° misalignment adjustment, the welding operation of 3 pipes and flat steel (extended from 2-piece set);

[0068] Figure 18 : Recessed Sharp Corner Tube Screen Assembly Welding - 7-Piece Assembly Structure Diagram, showing the complete "recessed sharp corner" 7-piece assembly structure formed after the C° and D° misaligned tube screen components are combined and welded.

[0069] Explanation of reference numerals in the attached figures:

[0070] Main structure: upper positioning tube 1-1, locking screw 1-2, lower positioning tube 1-3.

[0071] Upper positioning tube component: tubular body 1-1-1, countersunk blind screw hole 1-1-2, stepped shaft 1-1-3, plastic expansion sleeve 1-1-4. Snap-fit ​​screw component: external thread 1-2-1, cylindrical body 1-2-2.

[0072] Lower positioning tube components: tubular body 1-3-1, blind hole 1-3-2, stepped shaft 1-3-3, plastic expansion sleeve 1-3-4, magnetic attracting ring 1-3-5.

[0073] Tube screen product structure: protruding sharp corner tube screen product 0-1, concave sharp corner tube screen product 0-2, end allowance line 0-1-1, end allowance line 0-2-1. Detailed Implementation

[0074] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.

[0075] This patent discloses a method for staggered welding and splicing of tube screens. In using this method, a tube screen staggered welding and positioning device needs to be used in conjunction, such as... Figures 5-8 As shown. The device comprises: an upper positioning tube 1-1, a locking screw 1-2, and a lower positioning tube 1-3.

[0076] like Figure 5 As shown, the upper positioning tube 1-1 is configured as a tubular tube 1-1-1, and the outer diameter of the upper positioning tube 1-1 is set as Ф1, the outer diameter dimension being the same as the outer diameter of the tube of the tube screen.

[0077] like Figure 6 As shown, the bottom of the upper positioning tube 1-1 is provided with a row of countersunk blind screw holes 1-1-2, the number of countersunk blind screw holes 1-1-2 is set to 8, the pitch between the countersunk blind screw holes is set to S, and the value range of pitch S is 10mm~100mm. Among them, the number of pitches is set to C, and the numerical relationship is: C=8-1.

[0078] The upper positioning tube 1-1 has a stepped shaft 1-1-3 at its right end, with the end being tapered. A plastic expansion sleeve 1-1-4 is provided on the upper positioning tube 1-1, and the plastic expansion sleeve 1-1-4 is installed in the stepped shaft 1-1-3 at the right end of the upper positioning tube 1-1. The plastic expansion sleeve 1-1-4 is tightly fitted against the stepped shaft position of the upper positioning tube 1-1, and the parts are in frictional contact. The plastic expansion sleeve 1-1-4 is inserted into the tube port of the tube panel, and the parts are in frictional contact.

[0079] The countersunk blind screw hole 1-1-2 in the upper positioning tube 1-1 and the Figure 7 The external threads 1-2-1 of the clip screws 1-2 shown are engaged, and the two are fixed by a threaded connection.

[0080] like Figure 7 As shown, the body of the snap-fit ​​screw 1-2 is cylindrical 1-2-2, and the head of the snap-fit ​​screw 1-2 is provided with external thread 1-2-1, which cooperates with the countersunk blind screw hole 1-1-2 in the upper positioning tube 1-1, and the two are fixed by thread connection.

[0081] The length of the locking screw 1-2 is set to L2, and the numerical relationship is set as: L2=L+L1, where the value of L is the same as the width of the flat steel welded between the tube screen products in the tube screen; and the value of L1 is the same as the depth of the blind hole 1-3-5 in the lower positioning tube 1-3. The bottom of the locking screw 1-2 is set to a hemispherical shape.

[0082] like Figure 8 As shown, the lower positioning tube 1-3 body is configured as a tubular 1-3-1, and the outer diameter of the lower positioning tube 1-3 is set as Ф1, the outer diameter dimension being the same as the outer diameter of the tube of the tube screen.

[0083] The lower positioning tube 1-3 has a row of blind holes 1-3-2 at its top, with a total of 8 blind holes 1-3-2. The pitch between the blind holes is set to S, with a range of 10mm to 100mm. The number of pitches is set to C, with a numerical relationship of C = 8 - 1. The starting position and pitch of the first blind hole 1-3-2 in the lower positioning tube 1-3 are exactly the same as the countersunk blind screw hole 1-1-2 in the upper positioning tube 1-1. That is, the hole positions in the upper positioning tube 1-1 and the hole positions in the lower positioning tube 1-3 are vertically aligned.

[0084] The depth of the blind hole 1-3-2 in the lower positioning tube 1-3 is set to L1, wherein the value of L1 is the same as the dimension of L2 in the locking screw 1-2.

[0085] The lower positioning tube 1-3 has a row of blind holes 1-3-2 at its top. In this embodiment, each of the eight blind holes 1-3-2 has a magnetic iron-attracting ring 1-3-5 at its bottom.

[0086] The lower positioning tube 1-3 has a stepped shaft 1-3-3 at its right end, with the end being tapered. A plastic expansion sleeve 1-3-4 is provided on the lower positioning tube 1-3, and the plastic expansion sleeve 1-3-4 is installed in the stepped shaft 1-3-3 at the right end of the lower positioning tube 1-3. The plastic expansion sleeve 1-3-4 is tightly fitted against the stepped shaft of the lower positioning tube 1-3, and the parts are in frictional contact. The plastic expansion sleeve 1-3-4 is inserted into the inside of the tube port in the tube panel, and the parts are in frictional contact.

[0087] The blind hole 1-3-5 in the lower positioning tube 1-3 is connected to the cylindrical 1-2-2 in the locking screw 1-2 by a pin, and the two are set to a sliding contact connection.

[0088] The connection relationship between the components in a tube-panel misalignment welding positioning device is as follows: the external thread 1-2-1 of the head of the retaining screw 1-2 is screwed into the countersunk blind screw hole 1-1-2 in the upper positioning tube 1-1, and the retaining screw 1-2 is correspondingly inserted into the blind hole 1-3-2 in the lower positioning tube 1-3. The retaining screw 1-2 is installed in the blind hole 1-3-2 in the lower positioning tube 1-3 with a depth length of L1. That is, the upper positioning tube 1-1 and the lower positioning tube 1-3 are connected by the retaining screw 1-2, and the remaining length L of the retaining screw 1-2 is L = L2 - L1, where the value of L is the same as the width of the flat steel embedded in the tube-panel product.

[0089] The bottom hemisphere of the locking screw 1-2 contacts the magnetic attracting ring 1-3-5 at the bottom of the blind hole in the lower positioning tube 1-3.

[0090] When the left ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 are aligned vertically, there is no misalignment between them, which can be considered as a 0° angle. Inserting the plastic expansion sleeves at the right ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 into the tubes within the product's tube panel ensures that the vertical alignment of the left ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 also aligns the two tubes within the product's tube panel, which can also be considered as a 0° angle.

[0091] When the left ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 are misaligned, meaning there is a misalignment between them, and the upper positioning tube 1-1 protrudes beyond the port of the lower positioning tube 1-3, this is considered as a misalignment angle of A°. When the plastic expansion sleeves at the right ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 are inserted into the tubes within the product's tube panel, because the left ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 are misaligned, the two tubes within the product's tube panel also become misaligned, resulting in a misalignment, which is considered as a misalignment angle of A°.

[0092] When the left ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 are misaligned, meaning there is a misalignment between them, and the upper positioning tube 1-1 is recessed into the port of the lower positioning tube 1-3, this is considered a misalignment angle of B°. When the plastic expansion sleeves at the right ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 are inserted into the tubes in the product tube panel, because the left ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 are misaligned, the two tubes in the product tube panel also become misaligned, resulting in a misalignment, which is considered a misalignment angle of B°.

[0093] like Figures 9-13 As shown, in order to overcome the above-mentioned technical problems, this patent discloses a method for staggered welding splicing of tube screens. In conjunction with a tube screen staggered welding positioning device, the following operation steps can realize staggered welding splicing of a tube screen product 0-1 with a "protruding sharp corner" structure at the end.

[0094] Operation Step 1:

[0095] Based on the outer diameter and pitch of the tube in a tube screen product 0-1 with a "protruding sharp corner" structure at the end, prepare the upper positioning tube 1-1, the lower positioning tube 1-3, and the locking screw 1-2.

[0096] Based on the outer diameter Ф1 of the tube in the tube panel product and the corresponding inner diameter of the tube, select the upper positioning tube 1-1, the lower positioning tube 1-3 and the plastic expansion sleeves 1-1-4 and 1-3-4 with the same outer diameter as the tube, where the plastic expansion sleeves correspond to the inner diameter of the tube.

[0097] Based on the pipe pitch dimensions in tube panel product 0-1, determine the width L of the flat steel for embedding between tube panel products.

[0098] Based on the value of the blind hole depth L1 in the lower positioning tube 1-3, select a locking screw with a length dimension L2, where the numerical logic relationship is set as: L2=L+L1.

[0099] Install plastic expansion sleeves 1-1-4 and 1-3-4 into the stepped shafts 1-1-3 and 1-3-3 on the right end of the upper positioning tube 1-1 and lower positioning tube 1-3. Install the external thread 1-2-1 of the snap-fit ​​screw 1-2 into the countersunk blind screw hole 1-1-2 in the upper positioning tube 1-1.

[0100] Operation Step 2:

[0101] According to the bottom misalignment tilt angle of a tube screen product 0-1 with a "protruding sharp corner" structure at the end, and when the upper tube port protrudes beyond the lower tube port, the misalignment tilt angle is measured and set as A°, that is: the tilt angle between the lower end of the tube screen and the vertical line is set as: A, and the tilt angle range is: 0~70°.

[0102] like Figure 9 As shown, the left ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 are also arranged in a non-aligned manner, resulting in a misalignment between them. The upper positioning tube 1-1 protrudes beyond the port of the lower positioning tube 1-3, and the misalignment angle is adjusted to A°, the same as the misalignment angle A° at the top of the tube screen product. The plastic expansion sleeves at the right ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 are inserted into the tubes within the tube screen product. Because the left ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 have a misalignment angle A°, this further results in a misalignment angle A° between the two tubes within the tube screen product.

[0103] Operation Step 3:

[0104] like Figure 10 As shown, follow the operation steps 2, tilt angle A°, to complete the welding operation between the two sets of pipes and flat steel.

[0105] Using the same method described above, two groups of two pipes are welded together with flat steel to form four groups, and the pipe screen product with a uniform misalignment angle of A° is produced.

[0106] Operation Step 4:

[0107] According to the top misalignment tilt angle of a tube screen product 0-1 with a "protruding sharp corner" structure at the end, and when the upper tube port is recessed into the lower tube port, the misalignment tilt angle is set to B°, that is: the tilt angle between the upper end of the tube screen and the vertical line is set to B°, and the tilt angle range is 0 to 60°.

[0108] like Figure 11 As shown, the left ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 are also arranged in a non-aligned manner, resulting in a misalignment between them. Furthermore, the upper positioning tube 1-1 is recessed into the port of the lower positioning tube 1-3, and the misalignment angle is adjusted to B°, the same as the misalignment angle B° at the top of the tube screen product. The plastic expansion sleeves at the right ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 are inserted into the tubes within the tube screen product. Because the left ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 have a misalignment angle B°, this further results in a misalignment angle B° between the two tubes within the tube screen product.

[0109] Operation Step 5:

[0110] like Figure 12 As shown, follow the operation step 4, tilt angle B, to complete the welding operation between the two sets of pipes and the flat steel.

[0111] Using the same method described above, two groups of two pipes are welded together with flat steel to form four groups. The characteristic feature is that the pipe screen product has a uniform pipe screen tilt angle of B.

[0112] Operation step 6:

[0113] like Figure 13 As shown, two sets of pipe screen assemblies (A° and B°) are assembled according to the misalignment angle of pipe screen product 0-1 with a "protruding sharp corner" structure, resulting in 8 sets of pipe screen assemblies. Then, according to operation step 4, with misalignment angle B, the welding operation between the 8 sets of pipes and the flat steel is completed, finally realizing the assembly and splicing of the "protruding sharp corner" pipe screen product.

[0114] like Figure 14-18 As shown, in order to overcome the above-mentioned technical problems, this patent discloses another method for staggered welding splicing of tube screens. With the use of a tube screen staggered welding positioning device, the following operation steps can realize staggered welding splicing of a tube screen product 0-2 with a "concave sharp corner" structure at the end.

[0115] Operation Step 1:

[0116] Based on the outer diameter and pitch of the tube in a tube screen product 0-2 with a "recessed sharp corner" structure at the end, prepare the upper positioning tube 1-1, the lower positioning tube 1-3 and the locking screw 1-2.

[0117] Based on the outer diameter Ф1 of the tube in the tube panel product and the corresponding inner diameter of the tube, select the upper positioning tube 1-1, the lower positioning tube 1-3 and the plastic expansion sleeves 1-1-4 and 1-3-4 with the same outer diameter as the tube, where the plastic expansion sleeves correspond to the inner diameter of the tube.

[0118] Based on the pipe pitch dimensions in tube panel product 0-2, determine the width L of the flat steel for embedding between tube panel products.

[0119] Based on the value of the blind hole depth L1 in the lower positioning tube 1-3, select a locking screw with a length dimension L2, where the numerical logic relationship is set as: L2=L+L1.

[0120] Install plastic expansion sleeves 1-1-4 and 1-3-4 into the stepped shafts 1-1-3 and 1-3-3 on the right end of the upper positioning tube 1-1 and lower positioning tube 1-3. Install the external thread 1-2-1 of the snap-fit ​​screw 1-2 into the countersunk blind screw hole 1-1-2 in the upper positioning tube 1-1.

[0121] Operation Step 2:

[0122] According to the top misalignment tilt angle of a tube screen product 0-2 with a "concave sharp corner" structure at the end, and when the upper tube port protrudes from the lower tube port, the misalignment tilt angle is set to D°, that is: the tilt angle between the lower end of the tube screen and the vertical line is set to D, and the tilt angle range is 0 to 70°.

[0123] like Figure 14 As shown, the left ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 are also arranged in a non-aligned manner, resulting in a misalignment between them. The upper positioning tube 1-1 protrudes beyond the port of the lower positioning tube 1-3, and the misalignment angle is adjusted to D°, the same as the misalignment angle D° at the top of the tube screen product. The plastic expansion sleeves at the right ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 are inserted into the tubes within the tube screen product. Because the left ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 have a misalignment angle D°, this further results in a misalignment angle D° between the two tubes within the tube screen product.

[0124] Operation Step 3:

[0125] like Figure 15 As shown, follow the operation steps 2, tilt angle D, to complete the welding operation between the two sets of pipes and the flat steel.

[0126] Using the same method described above, two groups of two pipes are welded together with flat steel to form four groups, and the pipe screen product with a uniform misalignment angle of D is produced.

[0127] Operation Step 4:

[0128] According to the bottom misalignment tilt angle of a tube screen product 0-2 with a "recessed sharp angle" structure at the end, and when the upper tube port is recessed into the lower tube port, the misalignment tilt angle is set to C°, that is: the tilt angle between the upper end of the tube screen and the vertical line is set to C°, and the tilt angle range is 0 to 60°.

[0129] like Figure 16 As shown, the left ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 are also arranged in a non-aligned manner, resulting in a misalignment between the upper positioning tube 1-1 and the lower positioning tube 1-3. Furthermore, the upper positioning tube 1-1 is recessed into the port of the lower positioning tube 1-3, and the misalignment angle is adjusted to C°, the same as the misalignment angle C° at the top of the tube screen product. The plastic expansion sleeves at the right ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 are inserted into the tubes in the tube screen of the existing Example 1 product. Because the left ends of the upper positioning tube 1-1 and the lower positioning tube 1-3 have a misalignment angle C°, this further results in the two tubes in the product's tube screen also having a misalignment angle C°.

[0130] Operation Step 5:

[0131] like Figure 17 As shown, following operation step 4 with an offset tilt angle C, the welding operation between the three sets of pipes and the flat steel is completed. The pipe screen product has a uniform offset tilt angle of C.

[0132] Operation step 6:

[0133] like Figure 18 As shown, two sets of pipe screen assemblies (C° and D°) are assembled according to the misalignment angle of pipe screen product 0-2, which has a "recessed sharp corner" structure at the end, to obtain 7 sets of pipe screen assemblies. Then, according to operation step 4, with the misalignment angle C, the welding operation between the 7 sets of pipes and the flat steel is completed, and finally the "recessed sharp corner" pipe screen product is assembled and welded.

[0134] Compared with the prior art, the present invention has the following advantages: This patent discloses a method for staggered welding and splicing of tube screens. In the process of using this method, it is necessary to use a tube screen staggered welding and positioning device to successfully achieve the welding and splicing of tube screen products with one end presenting a "protruding sharp corner" and the other end presenting a "recessed sharp corner".

[0135] Meanwhile, this patent further discloses a tube screen misalignment welding positioning device. The device features a simple component design and can quickly assemble with tubes in tube screen components, suitable for various misaligned structures (ends with tilt angles). It further enables welding and splicing of tube screen products with either a "protruding sharp corner" or a "recessed sharp corner" end structure. Furthermore, no allowance is needed at the tube screen ends, reducing manufacturing costs, significantly shortening the manufacturing cycle, and improving production efficiency, facilitating widespread use in workshops.

[0136] The above description is a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model. These improvements and modifications are also considered to be within the protection scope of the present utility model, and the protection scope of the present utility model shall be defined by the claims.

Claims

1. A positioning device for misaligned welding of pipe screens, characterized in that, include: Upper positioning tube (1-1): outer diameter Φ1, 15mm~100mm, bottom has a row of countersunk blind screw holes (1-1-2), 8 holes, pitch S is 10mm~100mm; right end has a stepped shaft (1-1-3) and a plastic expansion sleeve (1-1-4) installed on it, used for friction connection of the tube end; Clip screw (1-2): The length satisfies L2=L+L1, where L is the width of the flat steel, 5mm~60mm; L1 is the depth of the blind hole, the external thread (1-2-1) of the head is connected to the thread of the countersunk blind screw hole, and the bottom is hemispherical; Lower positioning tube (1-3): outer diameter Φ1, 15mm~100mm, top has a row of blind holes (1-3-2), 8 holes, pitch S is 10mm~100mm, the hole positions correspond to the countersunk blind screw holes vertically; bottom of the blind hole is equipped with a magnetic attracting ring (1-3-5), depth L1; right end is equipped with a stepped shaft (1-3-3) and a plastic expansion sleeve (1-3-4) installed on it, used for friction connection of the tube end; The upper positioning tube and the lower positioning tube are connected by a snap-fit ​​screw. The cylindrical part (1-2-2) of the snap-fit ​​screw is inserted into the blind hole and slides in contact. The misalignment tilt angle can be adjusted from 0° to 70°.

2. The apparatus according to claim 1, characterized in that: The plastic expansion sleeves (1-1-4, 1-3-4) are inserted into the pipe port to fix the pipe position by friction.

3. The apparatus according to claim 1, characterized in that: The bottom hemisphere of the snap-fit ​​screw (1-2) contacts the magnetic attracting ring (1-3-5) to enhance connection stability.

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