A thin-walled large-diameter plastic inspection well welding processing device and welding method

Abstract

The present invention discloses a thin-walled large-diameter plastic inspection well welding processing device and a welding method, the device comprising a frame (1), a guide rail (2), a right power head (3), a right linear moving device (4), a left power head (5), a left linear moving device (6), a V-shaped roller device (7), a welding device (8) and a weld forming device (9). The present invention adopts a resistance hot plate melt extrusion gluing riveting welding method, which greatly improves the inspection well weld connection strength, which is more than 3 times that of other welding methods, and avoids the problems of inspection well weld false welding and leakage. In addition, the welding device of the present invention is simple in equipment, easy to operate, low in labor intensity and high in production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of municipal engineering, and in particular relates to a welding processing device and a welding method for a thin-walled large-diameter plastic inspection well. Background Art

[0002] Inspection wells, commonly known as "manholes", are auxiliary structures set up at the intersection of drainage pipes, bends, changes in pipe diameter or slope, waterfalls or at certain intervals in straight pipes to facilitate regular inspection and dredging of pipes. Plastic inspection wells have the advantages of being leak-proof, light weight, easy to construct, and having a long environmental life, and are increasingly widely used in engineering construction. Plastic inspection wells are manufactured using processes such as injection molding, rotational molding, and die extrusion and hot pressing. Injection molding and rotational molding processes are difficult to manufacture large-diameter and large-size products due to equipment limitations. Die extrusion and hot pressing processes are simple and can manufacture large-diameter and large-size products, but are difficult to achieve complex integral molding due to process limitations. Components are often integrally molded and then assembled and welded into finished products. The die extrusion and hot pressing molding process for plastic inspection wells has been widely used due to its wide material adaptability, good cavity filling, thin product well wall, high density, good strength, small shrinkage and deformation, low production scrap rate, and high efficiency. The main plastic combination welding methods include electric hot melt tape wrapping welding, ultrasonic welding, melt filling welding, hot melt welding, gluing, chemical bonding, etc. These welding methods all have problems such as large welding deformation, poor welding strength, low welding efficiency, etc., and there are also small welding or connection contact areas, low strength of the connection combination parts, and easy leakage.

[0003] The patent "Fusion-bonded welding type plastic inspection well bottom plate" has been published, publication number CN201245894Y. The welding is to connect the blank tube by melting the adhesive. During the welding process, the surface temperature of the blank tube is isothermal with the adhesive. The adhesive is extruded by an extruder. This method is melt filling welding, which is essentially bonding. The welding connection strength is low and the welding efficiency is not high.

[0004] The published patent "Modular molding and processing device and method for large plastic manhole seat" has the publication number CN106003746A. Its molding and processing method is: firstly, the main pipe and branch pipe are manufactured by injection molding, and then the welding plate is hot-melt welded. The welding surface is a flange ring structure, and the flange ring width H is greater than 2 times the wall thickness h of the manhole seat, H is in the range of 30-50mm, and h is in the range of 10-15mm. It is a wide-surface thick-wall contact welding, and the welding is bonding.

[0005] The published patent "Straight-through plastic inspection well molding and processing device and processing method", publication number CN106426970A, its molding and processing method is: integrated cutting and welding. First, the main pipe and branch pipe are manufactured by injection molding, then cut, and then welded by laser welding. The published patent "Plastic inspection well seat reinforcement rib plate laser continuous welding device and welding method", publication number CN108081622A, its molding and processing method is: first injection molding plastic inspection well seat, and then laser welding the reinforcement rib plate to the well seat. The published patent "A large plastic inspection well seat laser welding combined molding device and method", publication number CN108058391A, its molding and processing method is: first injection molding the bottom plate of the plastic inspection well seat, and then the semiconductor laser laser transmission welding method is used to weld the single-side panels to the well seat. The published patent "A laser welding combined molding device and method for a super-large plastic manhole seat" has a publication number of CN108454116A. Its molding method is: first injection molding a modular multi-layer circular ring block and a manhole seat bottom plate, and then using a laser transmission welding method to weld the multi-layer circular ring block to the manhole seat bottom plate. The published patent "Large modular plastic manhole seat, molding processing equipment and molding method" has a publication number of CN110126292A. Its molding method is: first injection molding a plastic manhole main pipe and branch pipe, and then using laser welding to weld the branch pipe to the main pipe.

[0006] Laser welding of plastic inspection wells adopts the transmission welding method. During welding, the laser beam penetrates the wall of the well to irradiate the weld and heat it. First, the laser beam is scattered, the thickness of the well wall is uneven, the light absorption of the material is uneven, the energy distribution of the laser spot is uneven, the heat conversion distribution of the laser is uneven, and the temperature distribution of the weld is uneven, which affects the strength of the weld connection and the quality of the welding. Second, the heating area of ​​the weld spot is small, and the energy conversion efficiency is low, usually less than 10%. The weld will solidify quickly, become brittle, and have pores, which will also affect the improvement of the weld connection strength and welding quality. Third, laser welding requires that the alignment and distance of the weldment are very precise, the equipment is expensive, the investment cost is high, and the welding efficiency is low. Therefore, it is difficult to meet the welding requirements of large-thickness and large-diameter plastic inspection wells.

[0007] At present, thin-walled large-diameter plastic inspection wells with a wall thickness of 8 to 12 mm and a diameter of more than 1200 mm, which are formed by die extrusion and hot pressing technology, are mostly assembled by manual welding rod melting and multiple surfacing welding due to their thin walls, large deformation of the cylinder, difficult welding alignment, narrow and long welding surface, and uneven weld stress. This is labor-intensive, has low production efficiency, and is difficult to ensure quality. Summary of the invention

[0008] The purpose of the present invention is to provide a thin-walled large-diameter plastic inspection well welding processing device and welding method to solve the problems of difficult welding alignment of thin-walled large-diameter plastic inspection wells, low weld connection strength, irregular welds, low processing efficiency, high equipment cost, etc., and at the same time solve the processing problems of large-diameter and large-depth plastic inspection wells.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A thin-walled large-diameter plastic inspection well welding processing device, comprising a frame, a guide rail, a right power head, a right linear moving device, a left power head, a left linear moving device, a V-shaped roller device, a welding device and a weld forming device;

[0011] The rack is connected to the foundation by bolts, and the guide rails are fixed to the rack by screws;

[0012] The right power head is composed of a machine base A, a rotary power head A and a chuck A; the machine base A is arranged on a guide rail through a slider, the rotary power head A is fixed on the machine base A, and the chuck A is connected to the rotary power head A through a coupling; the right linear moving device is arranged on the frame, and is connected to the right power head through a hinge;

[0013] The left power head is composed of a machine base B, a rotary power head B and a chuck B; the machine base B is arranged on the frame through a slider and a guide rail, the rotary power head B is fixed on the machine base B, and the chuck B is connected to the shaft of the rotary power head B through a clearance fit sleeve; the left linear moving device is arranged on the frame through a gear rack, and is connected to the left power head through screws;

[0014] The V-shaped roller device and the welding device are both arranged on the guide rail between the right power head and the left power head through a slider; the weld forming device is connected with the left power head through a coupling.

[0015] Preferably, the V-shaped roller device consists of a support, a roller bracket, a roller, and a roller adjustment rod; the support is connected to the guide rail via sliders arranged at both ends of its bottom; two sets of roller brackets and roller adjustment rods are provided, and the roller adjustment rods are symmetrically arranged on both sides of the support; the two sets of roller brackets are arranged in an inverted "eight" shape, the lower part of the roller bracket is fixed to the support by a hinge, and the upper part is connected to the top of the roller adjustment rod close to the roller bracket by a hinge; a plurality of rollers are arranged on the roller bracket; and a plurality of V-shaped roller devices are provided.

[0016] Preferably, the welding device consists of a welding bracket, a driving cylinder, a connecting plate and a heating plate; the welding bracket is connected to the guide rail via sliders arranged at both ends of its bottom; the driving cylinder is fixed on the welding bracket, and the driving cylinder, the connecting plate and the heating plate are matched and provided in multiple sets, and the driving cylinder, the connecting plate and the heating plate are connected in sequence; the heating plate is an arc-shaped structure, and multiple heating plates together form a circular ring.

[0017] Preferably, the weld forming device consists of a movable cylinder, a movable shaft, a telescopic cylinder, a roller frame, an inner forming roller, an outer forming roller and a clamping cylinder; the movable cylinder is connected to the rotary power head B through a coupling, and the movable cylinder, the movable shaft and the telescopic cylinder are connected in sequence; the roller frame is vertically fixed on the telescopic cylinder, and the inner forming roller is connected to the roller frame; the outer forming roller is arranged above the inner forming roller through a clamping cylinder, and the outer forming roller and the inner forming roller are located on the same vertical plane; the clamping cylinder is fixedly connected to the cantilever of the welding bracket.

[0018] Preferably, the roller frame and the inner forming roller are matched with each other, and the number of the inner forming roller is at least one.

[0019] The present invention also discloses a welding method for a thin-walled large-diameter plastic inspection well welding processing device, the steps of which are as follows:

[0020] (1) Use a crane to hoist the well seat onto the V-shaped roller device;

[0021] (2) The right power head moves to the left, allowing chuck A to clamp the well seat;

[0022] (3) The welding device moves to the right, driving the cylinder to extend so that the heating plate is close to the welding surface of the well seat;

[0023] (4) Lift the well body onto the V-shaped roller device by crane;

[0024] (5) The left power head moves to the right, allowing chuck B to clamp the well body;

[0025] (6) The left power head continues to move to the right, so that the welding surface of the well body is close to the heating plate;

[0026] (7) Heating and melting on a heating plate;

[0027] (8) The right power head moves to the right, the left power head moves to the left, and the driving cylinder of the welding device retracts;

[0028] (9) Move the right power head to the left and the left power head to the right to squeeze and melt the welding surfaces;

[0029] (10) The moving cylinder of the weld forming device extends so that the inner forming roller is located below the welding surface; then the telescopic cylinder extends so that the inner forming roller extends to the outer diameter of the well body; the welding device is moved so that the outer forming roller is located above the welding surface, and then the clamping cylinder is extended so that the outer forming roller extends to the outer diameter of the well body;

[0030] (11) The right power head drives the chuck A to rotate, and the left power head drives the weld forming device to rotate, with a speed of 20 to 40 r / min;

[0031] (12) The telescopic cylinder and the pressing cylinder are retracted, so that the inner forming roller and the outer forming roller are separated from the welding surface, the moving cylinder of the weld forming device is retracted, the right power head moves to the right, and the left power head moves to the left;

[0032] (13) Increase the number of well bodies according to the height of the inspection well and repeat the above welding steps;

[0033] (14) The welding device moves to the right, driving the cylinder to extend so that the heating plate is close to the other welding surface of the well body;

[0034] (15) Use a crane to hoist the closing well onto the V-shaped roller device;

[0035] (16) The left power head moves to the right, allowing chuck B to clamp the closing well;

[0036] (17) The left power head continues to move to the right, so that the welding surface of the closing well is close to the heating plate;

[0037] (18) Heating and melting on a heating plate;

[0038] (19) The right power head moves right, the left power head moves left, and the driving cylinder of the welding device retracts;

[0039] (20) Move the right power head to the left and the left power head to the right to squeeze and melt the welding surfaces;

[0040] (21) The moving cylinder of the weld forming device extends so that the inner forming roller is located below the welding surface; then the telescopic cylinder extends so that the inner forming roller extends to the outer diameter of the well body; the welding device is moved so that the outer forming roller is located above the welding surface, and then the pressing cylinder is extended so that the outer forming roller extends to the outer diameter of the well body;

[0041] (22) The right power head drives the chuck A to rotate, and the left power head drives the weld forming device to rotate, with a speed of 20 to 40 r / min;

[0042] (23) The telescopic cylinder and the pressing cylinder are retracted, so that the inner forming roller and the outer forming roller are separated from the welding surface, the moving cylinder of the weld forming device is retracted, the right power head moves right, and the left power head moves left;

[0043] (24) Use a crane to lift out the assembly inspection well.

[0044] Preferably, the heating temperature of the heating plate is 5-20° C. higher than the melting temperature of the plastic, the melting time is 10-30 s, the melting displacement is 1-3 mm, and the fitting pressure between the plastic welding surface and the heating plate is 0.3-1 MPa.

[0045] Preferably, when the welding surfaces are extruded and melt-bonded, the pressure applied is 1 to 3 MPa, and the pressure holding time is 10 to 30 seconds.

[0046] The present invention has at least the following beneficial effects:

[0047] (1) The present invention adopts the resistance heating plate melt extrusion gluing riveting welding method, which greatly improves the connection strength of the inspection well weld, which is more than 3 times that of other welding methods, and avoids the problems of false welding and leakage of the inspection well weld;

[0048] (2) The present invention adopts a forming roller to rotate and roll-press the forming process, thereby solving the problem of irregular welds in plastic inspection wells, and the welds are dense, thereby improving the connection strength of the inspection wells and reducing leakage;

[0049] (3) The present invention adopts an H-shaped riveted weld to envelop the two welded bodies, thereby improving the radial shear strength of the weld, increasing the inner and outer ribs of the inspection well, and improving the radial rigidity and strength of the inspection well;

[0050] (4) The present invention is applicable not only to narrow-surface thin-wall melt adhesive welding, but also to wide-surface thick-wall melt adhesive welding, and has a wide welding adaptability;

[0051] (5) The welding method of the present invention is also applicable to welding connections of other plastic products;

[0052] (6) The V-shaped roller device of the present invention is conducive to the centering of the inspection well weldment, reduces the rotational friction of the inspection well, reduces the circumferential shear force of the inspection well weld formation, and improves the weld quality;

[0053] (7) The heating plate of the present invention is a multi-piece assembled and disassembled type, which is suitable for welding inspection wells of different structures, shapes and diameters, thereby improving the welding efficiency of the inspection wells;

[0054] (8) The weld forming device of the present invention ensures the inner diameter size and roundness tolerance of the inspection well welding;

[0055] (9) The inner and outer forming rollers of the weld forming device of the present invention are pressed together to ensure the synchronous rotation of the left and right welds, thereby improving the weld quality;

[0056] (10) The welding device of the present invention has simple equipment, convenient operation, low labor intensity and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a structural schematic diagram of the present invention;

[0058] Figure 2 It is a schematic diagram of a V-shaped roller device;

[0059] Figure 3 is a schematic diagram of a welding device;

[0060] Figure 4 is a schematic diagram of a weld forming device;

[0061] Figure 5 This is the weld riveting diagram;

[0062] Figure 6 This is a schematic diagram of the right power head;

[0063] Figure 7 This is a schematic diagram of the left power head. DETAILED DESCRIPTION

[0064] Embodiments of the present invention are now described with reference to the accompanying drawings. It will be appreciated by those skilled in the art that the following embodiments are only used to illustrate the present invention and should not be considered as limiting the scope of the present invention. Where specific techniques, connections, conditions or processes are not indicated in the embodiments, the techniques, connections, conditions, processes described in the literature in the art or the product specifications are used. Where the materials, instruments or equipment used do not indicate the manufacturer, they are all conventional products that can be purchased.

[0065] Example 1

[0066] See also Figure 1 , Figure 6 and Figure 7 As shown, a thin-walled large-diameter plastic inspection well welding processing device provided by the present invention includes a frame 1, a guide rail 2, a right power head 3, a right linear moving device 4, a left power head 5, a left linear moving device 6, a V-shaped roller device 7, a welding device 8 and a weld forming device 9;

[0067] The rack 1 is connected to the foundation by bolts, and the guide rail 2 is fixed to the rack 1 by screws;

[0068] The right power head 3 is composed of a machine base A3-1, a rotary power head A3-2 and a chuck A3-3. The rotary power head A3-2 is a variable frequency motor or a variable hydraulic motor. The machine base A3-1 is arranged on the guide rail 2 through a slider, so that the right power head 3 can slide horizontally on the guide rail 2. The rotary power head A3-2 is fixed to the machine base A3-1 through screws, and the chuck A3-3 is connected to the rotary power head A3-2 through a spline coupling. The shape of the card slot arranged on the chuck A3-3 is the same as that of the bottom of the well seat, so as to clamp the well seat therein and fix it; the right linear moving device 4 is arranged on the frame 1, and is connected to the right power head 3 through a hinge.

[0069] The left power head 5 is composed of a machine base B5-1, a rotary power head B5-2 and a chuck B5-3. The rotary power head B5-2 is a variable frequency motor or a variable hydraulic motor. The machine base B5-1 is arranged on the frame 1 through a slider and a guide rail 2. The rotary power head B5-2 is fixed to the machine base B5-1 through screws. The chuck B5-3 is connected to the shaft of the rotary power head B5-2 through a clearance fit sleeve. The shape of the card slot arranged on the chuck B5-3 is the same as that of the upper part of the closing well, so as to clamp the closing well therein and fix it, and the outer shape of the card slot is the same as that of the well body, so as to clamp and fix the well body. The left linear moving device 6 is arranged on the frame 1 through a gear rack, and is connected to the left power head 5 through screws.

[0070] The V-shaped roller device 7 and the welding device 8 are both arranged on the guide rail 2 between the right power head 3 and the left power head 5 through a slider; the weld forming device 9 is connected to the left power head 5 through a coupling; the right linear moving device 4 is driven by an oil cylinder or an air cylinder, thereby moving the right power head 3; the left linear moving device 6 is driven by a variable frequency reduction motor or a variable hydraulic motor to drive the gear rack, thereby moving the left power head 5.

[0071] like Figure 2 As shown, the V-shaped roller device 7 is composed of a support 7-1, a roller bracket 7-2, a roller 7-3, and a roller adjustment rod 7-4; the support 7-1 is connected to the guide rail 2 through sliders arranged at both ends of its bottom; the roller bracket 7-2 and the roller adjustment rod 7-4 are each provided with two sets, and the roller adjustment rod 7-4 is symmetrically arranged on both sides of the support 7-1 through a screw nut; the two sets of roller brackets 7-2 are arranged in an inverted "eight" shape, and the lower part of the roller bracket 7-2 is fixed to the support 7-1 through a hinge support The upper part is connected to the top of the roller adjustment rod 7-4 close to the roller bracket 7-2 through a hinge; a plurality of rollers 7-3 are arranged on the roller bracket 7-2 through a slot and a nut; the angle between the two sets of roller brackets 7-2 and the support 7-1 is α, and the angle α can be changed by adjusting the screw nut to meet the envelope support of different specifications and diameters of the inspection well; a plurality of V-shaped roller devices 7 are provided, which can be moved on the guide rail 2 and adjusted in sections according to the support length of the inspection well.

[0072] Specifically, the welding device 8 is composed of a welding bracket 8-1, a driving cylinder 8-2, a connecting plate 8-3 and a heating plate 8-4; the welding bracket 8-1 includes a regular N-gonal outer frame 8-11, a base 8-12 arranged in the outer frame, a cantilever 8-13 horizontally arranged at the top of the outer frame and legs 8-14 arranged on both sides of the outer frame; the welding bracket 8-1 is connected to the guide rail 2 through sliders arranged under the legs 8-14 at both ends of its bottom; the driving cylinder 8-2 is fixed to the base 8-12 of the welding bracket 8-1 by screws, and the driving cylinder 8-2, the connecting plate 8-3 and the heating plate 8-4 are matched and provided with multiple sets, and the driving cylinder 8-2, the connecting plate 8-3 and the heating plate 8-4 are connected in sequence, specifically: the connecting plate 8-3 is connected to the driving cylinder 8-2 by threads, and the heating plate 8-4 is connected to the connecting plate 8-3 by bolts, such as Figure 3 As shown; the heating plate 8-4 is an arc-shaped structure, and multiple heating plates 8-4 together form a ring, and the inner diameter and outer diameter of the ring match the inner diameter and outer diameter of the plastic inspection well to be welded; the heating plate adopts resistance heating, and can be combined in 2, 3, 4, 6, etc.; the heating plate material is selected from beryllium copper alloy with the characteristics of high strength, high hardness, high conductivity, wear resistance, fatigue resistance, etc., and the size specifications are: R (radius) 600mm~R750mm, R750mm~R1000mm, R1000mm~R2000mm, R2000mm~R3000mm, and the thickness is generally 20mm~30mm.

[0073] Specifically, the weld forming device 9 is composed of a moving cylinder 9-1, a moving shaft 9-2, a telescopic cylinder 9-3, a roller frame 9-4, an inner forming roller 9-5, an outer forming roller 9-6 and a pressing cylinder 9-7; the moving cylinder 9-1 is connected to the rotary power head B5-2 through a coupling, and the moving cylinder 9-1, the moving shaft 9-2 and the telescopic cylinder 9-3 are connected in sequence, specifically: the moving shaft 9-2 is connected to the moving cylinder 9-1 through bolts, and the telescopic cylinder 9-3 is connected to the moving shaft 9-2 through bolts, such as Figure 4As shown; the axes of the moving cylinder 9-1, the moving shaft 9-2 and the telescopic cylinder 9-3 are on the same horizontal line, and the center of the circle formed by the multiple heating plates 8-4 is also on the axis; the roller frame 9-4 is vertically fixed to the telescopic cylinder 9-3 by bolts, and the inner forming roller 9-5 is connected to the roller frame 9-4 by a pin; the outer forming roller 9-6 is arranged above the inner forming roller 9-5 by a clamping cylinder 9-7, and the outer forming roller 9-6 and the inner forming roller 9-5 are located on the same vertical plane; the clamping cylinder 9-7 is fixedly connected to the cantilever of the welding bracket 8-1 by bolts; in the present invention, the inner forming roller 9-5 and the outer forming roller 9-6 can be made into a variety of structural shapes to form different weld appearances, and the forming roller material is selected from beryllium copper alloy, and the size is generally 20mm~30mm; the roller frame 9-4 and the inner forming roller 9-5 are arranged in a matching manner, and the number of the inner forming rollers 9-5 is two.

[0074] The welding principle of the weld seam of the present invention:

[0075] According to the Joule heating effect, when current flows through a resistor, it will generate heat, that is, convert electrical energy into thermal energy. The heating plate is heated by resistance heating to make the temperature of the heating plate reach the temperature required for plastic melting, and the welding molten plastic is squeezed and glued to form a riveted connection to meet the requirements of plastic melting welding connection, such as Figure 5 shown.

[0076] Example 2

[0077] The present invention also discloses a welding method for a thin-walled large-diameter plastic inspection well welding processing device, the steps of which are as follows:

[0078] (1) Use a crane to hoist the well seat 10 onto the V-shaped roller device 7;

[0079] (2) The right power head 3 moves to the left, allowing the chuck A3-3 to clamp the well seat 10;

[0080] (3) The welding device 8 moves to the right, driving the cylinder 8-2 to extend, so that the heating plate 8-4 is close to the welding surface of the well seat 10;

[0081] (4) hoisting the well body 11 onto the V-shaped roller device 7;

[0082] (5) The left power head 5 moves to the right, allowing the chuck B5-3 to clamp the well body 11;

[0083] (6) The left power head 5 continues to move to the right, so that the welding surface of the well body 11 is close to the heating plate 8-4;

[0084] (7) The heating plate 8-4 heats and melts the plastic. The heating temperature of the heating plate 8-4 is 5 to 20°C higher than the melting temperature of the plastic. The melting time is 10 to 30 seconds. The melting displacement is 1 to 3 mm. The pressure between the plastic welding surface and the heating plate is 0.3 to 1 MPa.

[0085] (8) The right power head 3 moves rightward, the left power head 5 moves leftward, and the driving cylinder 8-2 of the welding device 8 retracts, so that the heating plate 8-4 is separated from the welding surface;

[0086] (9) The right power head 3 moves to the left and the left power head 5 moves to the right, so that the welding surfaces are squeezed, melted and glued. The applied pressure is 1 to 3 MPa and the pressure holding time is 10 to 30 seconds.

[0087] (10) The moving cylinder 9-1 of the weld forming device 9 is extended to position the inner forming roller 9-5 below the welding surface; then the telescopic cylinder 9-3 is extended to position the inner forming roller 9-5 to the outer diameter of the well body; the welding device 8 is moved to position the outer forming roller 9-6 above the welding surface, and then the pressing cylinder 9-7 is extended to position the outer forming roller 9-6 to the outer diameter of the well body;

[0088] (11) The right power head 3 drives the chuck A3-3 to rotate, and the left power head 5 drives the weld forming device 9 to rotate, with a speed of 20 to 40 r / min;

[0089] (12) The telescopic cylinder 9-3 and the pressing cylinder 9-7 are retracted, so that the inner forming roller 9-5 and the outer forming roller 9-6 leave the welding surface, and the moving cylinder 9-1 of the weld forming device 9 is retracted, and the right power head 3 moves right and the left power head 5 moves left;

[0090] (13) Increase the number of well bodies 11 according to the height of the inspection well and repeat the above welding steps;

[0091] (14) The welding device 8 moves to the right, driving the cylinder 8-2 to extend, so that the heating plate 8-4 is close to the other welding surface of the well body 11;

[0092] (15) Use a crane to hoist the closing well 12 onto the V-shaped roller device 7;

[0093] (16) The left power head 5 moves to the right, allowing the chuck B5-3 to clamp the closing well 12;

[0094] (17) The left power head 5 continues to move to the right, so that the welding surface of the closing well 12 is close to the heating plate 8-4;

[0095] (18) Heating plate 8-4 heats and melts;

[0096] (19) The right power head 3 moves right, the left power head 5 moves left, and the driving cylinder 8-2 of the welding device 8 retracts;

[0097] (20) The right power head 3 moves to the left and the left power head 5 moves to the right, so that the welding surfaces are squeezed, melted and glued;

[0098] (21) The moving cylinder 9-1 of the weld forming device 9 is extended to position the inner forming roller 9-5 below the welding surface; then the telescopic cylinder 9-3 is extended to position the inner forming roller 9-5 to the outer diameter of the well body; the welding device 8 is moved to position the outer forming roller 9-6 above the welding surface, and then the pressing cylinder 9-7 is extended to position the outer forming roller 9-6 to the outer diameter of the well body;

[0099] (22) The right power head 3 drives the chuck A3-3 to rotate, and the left power head 5 drives the weld forming device 9 to rotate, with a speed of 20 to 40 r / min;

[0100] (23) The telescopic cylinder 9-3 and the pressing cylinder 9-7 are retracted, so that the inner forming roller 9-5 and the outer forming roller 9-6 leave the welding surface, and the moving cylinder 9-1 of the weld forming device 9 is retracted, and the right power head 3 moves right and the left power head 5 moves left;

[0101] (24) The assembled inspection well is hoisted out by a crane; the well seat 10, well body 11, closing well 12 and pipe socket are made of high-density polyethylene plastic and are formed in one step by a die extrusion and hot pressing process; the pipe socket is welded on-site according to the height position and circumferential azimuth angle of the inspection well on-site installation.

[0102] The specific implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A thin-walled large-diameter plastic inspection well welding processing device, comprising a frame (1) and a guide rail (2), characterized in that: The device also includes a right power head (3), a right linear motion device (4), a left power head (5), a left linear motion device (6), a V-shaped roller device (7), a welding device (8) and a weld forming device (9); The frame (1) is connected to the foundation by bolts, and the guide rail (2) is fixed to the frame (1) by screws; The right power head (3) is composed of a machine base A (3-1), a rotary power head A (3-2) and a chuck A (3-3); the machine base A (3-1) is arranged on a guide rail (2) via a slider, the rotary power head A (3-2) is fixed on the machine base A (3-1), and the chuck A (3-3) is connected to the rotary power head A (3-2) via a coupling; the right linear moving device (4) is arranged on the frame (1), and is connected to the right power head (3) via a hinge. The left power head (5) is composed of a machine base B (5-1), a rotary power head B (5-2) and a chuck B (5-3); the machine base B (5-1) is arranged on the frame (1) through a slider and a guide rail (2), the rotary power head B (5-2) is fixed on the machine base B (5-1), and the chuck B (5-3) is connected to the shaft of the rotary power head B (5-2) through a clearance fit sleeve; the left linear moving device (6) is arranged on the frame (1) through a gear rack, and is connected to the left power head (5) through screws; The V-shaped roller device (7) and the welding device (8) are both arranged on the guide rail (2) between the right power head (3) and the left power head (5) via a slider; the weld forming device (9) is connected to the left power head (5) via a coupling.

2. A thin-walled large-diameter plastic inspection well welding processing device according to claim 1, characterized in that: The V-shaped roller device (7) is composed of a support (7-1), a roller bracket (7-2), a roller (7-3), and a roller adjustment rod (7-4); the support (7-1) is connected to the guide rail (2) via sliders arranged at both ends of the bottom thereof; the roller bracket (7-2) and the roller adjustment rod (7-4) are each provided with two sets, and the roller adjustment rods (7-4) are symmetrically arranged on both sides of the support (7-1); the two sets of roller brackets (7-2) are arranged in an inverted "eight" shape, the lower part of the roller bracket (7-2) is fixed to the support (7-1) by a hinge, and the upper part is respectively connected to the top of the roller adjustment rod (7-4) close to the roller bracket (7-2) by a hinge; a plurality of rollers (7-3) are arranged on the roller bracket (7-2); the V-shaped roller device (7) is provided with a plurality of rollers.

3. A thin-walled large-diameter plastic inspection well welding processing device according to claim 1 or 2, characterized in that: The welding device (8) is composed of a welding bracket (8-1), a driving cylinder (8-2), a connecting plate (8-3) and a heating plate (8-4); the welding bracket (8-1) is connected to the guide rail (2) via sliders arranged at both ends of the bottom thereof; the driving cylinder (8-2) is fixed on the welding bracket (8-1), the driving cylinder (8-2), the connecting plate (8-3) and the heating plate (8-4) are arranged in a matching manner, and multiple sets are provided, and the driving cylinder (8-2), the connecting plate (8-3) and the heating plate (8-4) are connected in sequence; the heating plate (8-4) is an arc-shaped structure, and multiple heating plates (8-4) together form a circular ring.

4. A thin-walled large-diameter plastic inspection well welding processing device according to claim 3, characterized in that: The weld forming device (9) is composed of a moving cylinder (9-1), a moving shaft (9-2), a telescopic cylinder (9-3), a roller frame (9-4), an inner forming roller (9-5), an outer forming roller (9-6) and a pressing cylinder (9-7); the moving cylinder (9-1) is connected to a rotary power head B (5-2) via a coupling, and the moving cylinder (9-1), the moving shaft (9-2) and the telescopic cylinder (9-3) are connected in sequence; the roller frame (9-4) is vertically fixed on the telescopic cylinder (9-3), and the inner forming roller (9-5) is connected to the roller frame (9-4); the outer forming roller (9-6) is arranged above the inner forming roller (9-5) via a pressing cylinder (9-7), and the outer forming roller (9-6) and the inner forming roller (9-5) are located on the same vertical plane; the pressing cylinder (9-7) is fixedly connected to the cantilever of the welding bracket (8-1).

5. A thin-walled large-diameter plastic inspection well welding processing device according to claim 4, characterized in that: The roller frame (9-4) and the inner forming roller (9-5) are arranged in a matching manner, and the number of the inner forming roller (9-5) is at least one.

6. The welding method of a thin-walled large-diameter plastic inspection well welding processing device according to claim 4 is characterized in that: Here are the steps: (1) Using a crane to hoist the well seat (10) onto the V-shaped roller device (7); (2) The right power head (3) moves to the left, allowing the chuck A (3-3) to clamp the well seat (10); (3) The welding device (8) moves to the right, driving the cylinder (8-2) to extend, so that the heating plate (8-4) is in close contact with the welding surface of the well seat (10); (4) hoisting the well body (11) onto the V-shaped roller device (7); (5) The left power head (5) moves to the right, allowing the chuck B (5-3) to clamp the well body (11); (6) The left power head (5) continues to move to the right, so that the welding surface of the well body (11) is close to the heating plate (8-4); (7) heating plate (8-4) heating and melting; (8) The right power head (3) moves right, the left power head (5) moves left, and the driving cylinder (8-2) of the welding device (8) moves back; (9) The right power head (3) moves to the left and the left power head (5) moves to the right, so that the welding surfaces are squeezed, melted and glued; (10) The moving cylinder (9-1) of the weld forming device (9) is extended to position the inner forming roller (9-5) below the welding surface; then the telescopic cylinder (9-3) is extended to position the inner forming roller (9-5) to the inner diameter size of the well body; the moving welding device (8) is positioned to position the outer forming roller (9-6) above the welding surface; then the pressing cylinder (9-7) is extended to position the outer forming roller (9-6) to the outer diameter size of the well body; (11) The right power head (3) drives the chuck A (3-3) to rotate, and the left power head (5) drives the weld forming device (9) to rotate, with a rotation speed of 20 to 40 r / min; (12) the telescopic cylinder (9-3) and the pressing cylinder (9-7) are retracted, thereby causing the inner forming roller (9-5) and the outer forming roller (9-6) to leave the welding surface, the moving cylinder (9-1) of the weld forming device (9) is retracted, the right power head (3) is moved to the right, and the left power head (5) is moved to the left; (13) Add more well bodies (11) according to the height of the inspection well and repeat the above welding steps; (14) The welding device (8) moves to the right, driving the cylinder (8-2) to extend, so that the heating plate (8-4) is in close contact with the other welding surface of the well body (11); (15) Using a crane, hoist the closing well (12) onto the V-shaped roller device (7); (16) The left power head (5) moves to the right, allowing the chuck B (5-3) to clamp the closing well (12); (17) The left power head (5) continues to move to the right, so that the welding surface of the closing well (12) is close to the heating plate (8-4); (18) heating plate (8-4) for heating and melting; (19) The right power head (3) moves right, the left power head (5) moves left, and the driving cylinder (8-2) of the welding device (8) retracts; (20) The right power head (3) moves to the left and the left power head (5) moves to the right, so that the welding surfaces are squeezed, melted and glued; (21) The moving cylinder (9-1) of the weld forming device (9) is extended to position the inner forming roller (9-5) below the welding surface; then the telescopic cylinder (9-3) is extended to position the inner forming roller (9-5) to the inner diameter size of the well body; the moving welding device (8) is positioned to position the outer forming roller (9-6) above the welding surface; then the pressing cylinder (9-7) is extended to position the outer forming roller (9-6) to the outer diameter size of the well body; (22) the right power head (3) drives the chuck A (3-3) to rotate, and the left power head (5) drives the weld forming device (9) to rotate, with a rotation speed of 20 to 40 r / min; (23) the telescopic cylinder (9-3) and the pressing cylinder (9-7) are retracted, thereby causing the inner forming roller (9-5) and the outer forming roller (9-6) to leave the welding surface, the moving cylinder (9-1) of the weld forming device (9) is retracted, the right power head (3) is moved to the right, and the left power head (5) is moved to the left; (24) Use a crane to lift out the assembly inspection well.

7. The welding method of a thin-walled large-diameter plastic inspection well welding processing device according to claim 6 is characterized in that: The heating temperature of the heating plate (8-4) is 5-20°C higher than the melting temperature of the plastic, the melting time is 10-30s, the melting displacement is 1-3mm, and the fitting pressure between the plastic welding surface and the heating plate is 0.3-1MPa.

8. The welding method of a thin-walled large-diameter plastic inspection well welding processing device according to claim 6 is characterized in that: When the welding surfaces are extruded and melted, the applied pressure is 1 to 3 MPa and the holding time is 10 to 30 seconds.

Images