Quick and accurate alignment device for PVC pipe hot melt welding

Abstract

A rapid and precise alignment device for hot-melt welding of PVC pipes includes: a pipe fixing mechanism, an alignment mechanism, a correction mechanism, a moving mechanism, a timing mechanism, a hot-melt device, and a control device. The alignment mechanism has an alignment block one and an alignment block two, which engage intermittently. The alignment mechanism is slidably mounted on the moving mechanism via the alignment blocks one and two. The moving mechanism is fixedly mounted on the ground. Two pipe fixing mechanisms are symmetrical about the hot-melt device and are respectively fixedly mounted on the alignment blocks one and two. The correction mechanism is fixedly mounted on the moving mechanism corresponding to the PVC pipes on the pipe fixing mechanisms. The hot-melt device is rotatably mounted on the correction mechanism. The timing mechanism is fixedly mounted on the moving mechanism. This invention, through the alignment and correction mechanisms, can achieve a high degree of automation in calibrating PVC pipes, eliminating the need for manual observation for alignment and reducing errors caused by manual observation.

Description

Technical Field

[0001] This invention relates to the field of pipe welding equipment, specifically a rapid and precise alignment device for hot-melt welding of PVC pipes. Background Technology

[0002] PVC is short for Polyvinyl chloride. It is a material whose main component is polyvinyl chloride, with other components added to enhance its heat resistance, toughness, and ductility.

[0003] Hot melt welding is a common method for connecting PVC pipes, and the two pipes need to be aligned during hot melt welding.

[0004] Chinese utility model patent application number CN202223190209.8 discloses a PVC pipe hot melt welding device, belonging to the field of pipe welding equipment. It includes a shell, a first PVC pipe, and a second PVC pipe. A heat-conducting plate is arranged below the shell, and a heating plate is arranged below the heat-conducting plate. A hot melt groove is arranged in the middle of the heating plate corresponding to the first and second PVC pipes. Side plates are arranged on both sides of the upper end face of the shell, and movable pressure plates are arranged inside the side plates. A multi-purpose plate is arranged on the top of the movable pressure plate. The width of the movable pressure plate is equal to the thickness of the heating plate. A pressing groove is arranged on the inner end face of the movable pressure plate corresponding to the first and second PVC pipes. Pressure strips are arranged on both sides of the inner end face of the movable pressure plate. By setting side plates on the upper part of the shell, the detachable movable pressure plate and multi-purpose plate can be installed. The multi-purpose plate can be used as a handle for lifting. At the same time, the movable pressure plate, in conjunction with the pressure strips, can press indentations into the PVC pipe to be welded, facilitating the alignment of the heating plate and ensuring the accuracy of the hot melt welding.

[0005] However, this solution has some shortcomings. First, it requires manual observation to align the alignment line 14 with the pipe connection. Aligning lines is difficult, and manual observation is prone to errors due to the observation angle, resulting in inaccurate pipe alignment. Second, it requires pressing the movable pressure plate 8 to make the pressure strip 15 contact the pipe surface and create an indentation. Then, the heating plate 3 is installed at the pipe connection, and the positions of both sides of the heating plate 3 are observed to align with the indentation on the pipe surface. The movable pressure plate 8 is installed on the multi-purpose plate 7. After the multi-purpose plate 7 is removed from the outer shell 1, there is no fixed installation device, making it inconvenient to operate during the pressing process of the movable pressure plate 8, which is prone to shaking and thus errors. Then, after creating an indentation on the pipe surface, the heating plate 3 needs to be manually moved to the pipe connection, and the indentation on the heating plate 3 and the pipe needs to be manually checked. Manual operation is cumbersome, requires multiple calibrations, is prone to errors, and has low work efficiency.

[0006] Therefore, inventing a rapid and precise alignment device for hot-melt welding of PVC pipes has become an urgent task. Summary of the Invention

[0007] To address the problems in the background art, the present invention provides a rapid and precise alignment device for hot-melt welding of PVC pipes, the specific technical solution of which is as follows:

[0008] A rapid and precise alignment device for hot-melt welding of PVC pipes includes: a pipe fixing mechanism, an alignment mechanism, a correction mechanism, a moving mechanism, a timing mechanism, a hot-melt device, and a control device. The alignment mechanism has an alignment block one and an alignment block two, which intermittently engage. The alignment mechanism is slidably mounted on the moving mechanism via the alignment blocks one and two. The moving mechanism is fixedly mounted on the ground. Two pipe fixing mechanisms are symmetrical about the hot-melt device and are respectively fixedly mounted on the alignment blocks one and two. The correction mechanism is fixedly mounted on the moving mechanism corresponding to the PVC pipes on the pipe fixing mechanisms, used to correct the position of the PVC pipes fixed on the pipe fixing mechanisms. The hot-melt device is rotatably mounted on the correction mechanism and intermittently engages with the PVC pipes on the pipe fixing mechanisms. The timing mechanism is fixedly mounted on the moving mechanism to limit the hot-melt welding process within a set time. The control device controls the operation of the entire rapid and precise alignment device for hot-melt welding of PVC pipes, excluding itself.

[0009] Furthermore, the pipe fixing mechanism is provided with a pipe placement plate and a fixing plate; the pipe placement plate is fixedly installed on the fixing plate; two threaded rods are slidably installed on the pipe placement plate and driven by a motor fixedly installed on the pipe placement plate; a clamping block is fixedly connected to the bottom of the threaded rod; the fixing plates on the two pipe fixing mechanisms are respectively fixedly installed on alignment block one and alignment block two.

[0010] Furthermore, the alignment mechanism is also provided with a fixing block; the first alignment block and the second alignment block are respectively fixedly installed on the two fixing blocks; the bottom end of the fixing block is slidably installed on the moving mechanism, and the upper end is fixedly connected to the fixing plate; the right side of the first alignment block is provided with a first inclined surface, and the left side of the second alignment block is provided with a second inclined surface that cooperates with the first inclined surface.

[0011] Furthermore, the correction mechanism is provided with a support frame, a correction frame, and an alignment plate; the support plate is fixedly installed on the ground or on the moving mechanism; the correction frame is slidably installed on the support frame and driven by a motor fixedly installed on the support frame; the alignment plate is provided with baffles on both sides, and the baffles on both sides are symmetrical about the hot melt device, and the baffles on the alignment plate correspond to the PVC pipes fixed on the pipe fixing mechanism; the alignment plate is slidably installed on the support frame and driven by a cylinder fixedly installed on the support frame.

[0012] Furthermore, the moving mechanism is provided with a housing; the support plate is fixedly installed on the housing; two sliding blocks are symmetrically slidably installed on the housing; a slider is fixedly installed on the sliding block; the two fixed blocks are respectively slidably installed on the two sliders.

[0013] Furthermore, the outer casing is provided with a horizontal slide rail, and one end of the sliding block is provided with a push rod, which is slidably mounted on the slide rail.

[0014] Furthermore, the timing mechanism is equipped with an hourglass and a limiting block; the limiting block and the hot-melt device are located in the same vertical plane, and one end is fixedly connected to the outer shell, while the other end is slidably connected to a locking plate; the locking plate has locking heads on both sides of the end near the limiting block, and the other end is fixedly connected to the control plate; the control plate is slidably mounted on the outer shell and elastically connected to the limiting block; the two hourglasses are symmetrically rotated and mounted on the outer shell, located above both ends of the control plate, and driven by a drive device mounted on the moving mechanism; a control rod is elastically and slidably installed at each end of the hourglass; through holes are opened on the bottom surface of both ends of the hourglass, and one end of the control rod passes through the through hole and abuts against the control plate; the moving block is equipped with a second locking head, which cooperates with the locking head on the locking plate to fix the two moving blocks on the locking plate; the two moving blocks are elastically connected.

[0015] Furthermore, the driving device includes a gear, a rack, and a connecting rod; two connecting rods are symmetrically rotatably mounted on the outer casing, with one end of the connecting rod fixedly connected to the middle position of the hourglass and the other end fixedly connected to the gear; two racks are symmetrically fixedly connected to any one of the moving blocks, and are intermittently engaged with the two gears respectively.

[0016] Furthermore, the hot-melt device is rotatably mounted on the support frame and is driven by a motor fixedly mounted on the support frame.

[0017] Compared with the prior art, the advantages of the present invention are as follows:

[0018] (1) The present invention can achieve the calibration of PVC pipes with a high degree of automation through the alignment mechanism and the correction mechanism, and does not need to rely mainly on manual observation for alignment, thus reducing the error caused by manual observation;

[0019] (2) The alignment mechanism of the present invention uses the mating and docking of surfaces to achieve horizontal calibration, which has greater stability and higher accuracy;

[0020] (3) The present invention uses a timing mechanism to limit the time of PVC pipe hot melting, so that the hot melting of the pipe is consistent each time, avoiding the situation that the hot melting time of the pipe is different each time due to human factors, which leads to different welding quality of PVC pipe hot melting. Moreover, the timing mechanism does not require manual operation during the hot melting process, which reduces the labor intensity of manual labor to a certain extent, saves labor time, and allows other work to be carried out during the hot melting process, thus improving overall work efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall assembly structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the assembly structure of the pipe fixing mechanism and the alignment mechanism of the present invention;

[0023] Figure 3-4 This is a partial assembly structure diagram of the pipe fixing mechanism of the present invention;

[0024] Figure 5 This is a schematic diagram of the assembly structure of the pipeline fixing mechanism, alignment mechanism, moving mechanism and timing mechanism of the present invention;

[0025] Figure 6 This is a schematic diagram of the assembly structure of the alignment mechanism of the present invention;

[0026] Figure 7 This is a schematic diagram of the assembly structure of the fixing block and the slider of the present invention;

[0027] Figure 8 This is a schematic diagram of the assembly structure of the straightening mechanism and the pipe fixing mechanism of the present invention;

[0028] Figure 9-10 This is a schematic diagram of the assembly structure of the moving mechanism of the present invention;

[0029] Figure 11 This is a schematic diagram of the assembly structure of the moving mechanism and the timing mechanism of the present invention;

[0030] Figure 12-14 This is a partial assembly structure diagram of the timing mechanism of the present invention;

[0031] Figure 15 This is a schematic diagram of the assembly structure of the hot-melt device and the straightening mechanism of the present invention;

[0032] Figure 16 This is a schematic diagram of the alignment plate of the present invention;

[0033] Figure 17 This is a schematic diagram of the assembly structure of the alignment plate and support frame of the present invention.

[0034] In the diagram: 1-Pipe fixing mechanism (101-Threaded rod, 102-Drive wheel, 103-Chain, 104-Threaded sleeve, 105-Pipe placement plate, 106-Clamping block, 107-Fixing disc, 108-Motor);

[0035] 2-Alignment mechanism (201-Alignment block one, 202-Alignment block two, 203-Fixing block);

[0036] 3-Correcting mechanism (301-Support frame, 302-Motor II, 303-Chain II, 304-Threaded rod II, 305-Correcting frame, 306-Alignment plate);

[0037] 4-Moving mechanism (401-Housing, 402-Slider, 403-Moving block);

[0038] 5-Timer mechanism (501-Hourglass, 502-Gear, 503-Spring, 504-Rack, 505-Limit block, 506-Control board, 507-Connecting rod, 508-Clamping plate, 509-Control rod);

[0039] Hot melt device. Detailed Implementation

[0040] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention. Example:

[0041] like Figure 1As shown, a rapid and precise alignment device for hot-melt welding of PVC pipes includes: a pipe fixing mechanism 1, an alignment mechanism 2, a correction mechanism 3, a moving mechanism 4, a timing mechanism 5, a hot-melt device 6, and a control device; the alignment mechanism 2 is provided with an alignment block 1 201 and an alignment block 202, which are intermittently engaged; the alignment mechanism 2 is slidably mounted on the moving mechanism 4 via the alignment blocks 1 201 and 202; the moving mechanism 4 is fixedly mounted on the ground; the two pipe fixing mechanisms 1 are symmetrical about the hot-melt device 6 and are respectively fixedly mounted on the alignment blocks 1 201 and 202. On 01 and alignment block 202; the correction mechanism 3 is fixedly installed on the moving mechanism 4 corresponding to the PVC pipe on the pipe fixing mechanism 1, and is used to correct the position of the PVC pipe fixed on the pipe fixing mechanism 1; the hot melt device 6 is rotatably installed on the correction mechanism 3 and intermittently cooperates with the PVC pipe on the pipe fixing mechanism 1; the timing mechanism 5 is fixedly installed on the moving mechanism 4 to limit the hot melt welding process within a set time; the control device controls the operation of the fast and accurate alignment device for hot melt welding of the entire PVC pipe except itself.

[0042] Specifically, the pipe fixing mechanism 1 is provided with a pipe placement plate 105 and a fixing plate 107; the pipe placement plate 105 is fixedly installed on the fixing plate 107; two threaded rods 101 are slidably installed on the pipe placement plate 105, and two threaded sleeves 104 respectively meshing with the two threaded rods 101 are rotatably installed on the pipe placement plate 105; a motor 108 is fixedly installed on the pipe placement plate 105, and a drive wheel 102 is fixedly connected to the output end of the motor 108; a toothed ring is fixedly installed on the outer side of the threaded sleeve 104; the pipe fixing mechanism 1 is also provided with a chain 103, and the chain 103 is connected to the two threaded rods 104. The gear ring on sleeve 104 and the drive wheel 102 are both meshed; the rotation of motor 108 drives the drive wheel 102 to rotate, which in turn drives the two threaded sleeves 104 to rotate synchronously, causing the two threaded rods 101 to slide on the pipe placement plate 105; a clamping block 106 is fixedly connected to the bottom of the threaded rod 101; the fixing discs 107 on the two pipe fixing mechanisms 1 are respectively fixedly installed on the alignment block one 201 and the alignment block two 202; the threaded rod 101 is provided with a sliding groove, and the pipe placement plate 105 is provided with a protruding limiting block, which slides in the sliding groove on the threaded rod 101; Figure 2-4 As shown, the device in this embodiment is different from the traditional screw rotation that drives the slider to slide back and forth. The threaded sleeve 104 is rotatably mounted on the pipe placement plate 105, and the threaded rod 101 slides on the pipe placement plate 105. In order to prevent the threaded rod 101 from rotating, the slider on the pipe placement plate 105 limits the threaded rod 101 so that the threaded rod 101 can only slide up and down. In this way, the direction of the clamping block 106 fixedly mounted at the bottom of the threaded rod 101 will be fixed.

[0043] As a specific implementation of this embodiment, the bottom end of the clamping block 106 that contacts the PVC pipe is an inwardly concave slope, which can more stably clamp the PVC pipe.

[0044] To achieve more precise alignment, specifically, such as Figure 5-7 As shown, the alignment mechanism 2 is also provided with a fixing block 203; the first alignment block 201 and the second alignment block 202 are respectively fixedly installed on the two fixing blocks 203; the bottom end of the fixing block 203 is slidably installed on the moving mechanism 4, and the upper end is fixedly connected to the fixing plate 107; the right side of the first alignment block 201 is provided with an inclined surface 1, and the left side of the second alignment block 202 is provided with an inclined surface 2 that cooperates with the inclined surface 1; through the precise alignment of the inclined surface 1 and the inclined surface 2, the first alignment block 201 and the second alignment block 202 are in the same vertical plane, thereby making the two fixing plates 107 and the two pipe placement plates 105 fixedly installed on the fixing plates 107 in the same vertical horizontal plane;

[0045] Furthermore, the straightening mechanism 3 is provided with a support frame 301, a straightening frame 305, and an alignment plate 306; the support plate 301 is fixedly installed on the moving mechanism 4; two threaded rods 304 and a motor 302 are rotatably installed on the support plate 301, the output end of the motor 302 is fixedly connected to a gear, and one end of the threaded rod 304 is fixedly installed with a gear; the straightening mechanism 3 is also provided with a chain 303, which meshes with both gears; the vertical part of the straightening frame 305 is vertically slidably installed on the support frame 301, and the horizontal part is vertically slidably installed on the two threaded rods 304; the alignment plate 306 is provided with baffles on both sides, and the baffles on both sides are symmetrical about the hot melt device 6; the baffles on the alignment plate 306 correspond to the PVC pipes fixed on the pipe fixing mechanism 1; the alignment plate 306 is slidably installed on the support frame 301 and is driven by a cylinder fixedly installed on the support frame 301.

[0046] The rotation of motor 302 drives gear 2 to rotate, which in turn drives the two threaded rods 304 to rotate synchronously. This allows the straightening frame 305 to slide smoothly on the support frame 301. As a specific implementation of this embodiment, the straightening frame 305 has four vertical supports for horizontally straightening the PVC pipes fixed on the two pipe placement plates 105. The clamping block 106 holds the PVC pipe against the pipe placement plate 105, limiting the vertical movement of the PVC pipe so that the two PVC pipes are at the same height in the vertical direction. However, when the PVC pipe is manually placed on the pipe placement plate 105 for clamping, it is difficult to accurately align the joints of the two PVC pipes, i.e., it is not possible to make the two PVC pipes... Since the PVC pipes are in the same vertical plane, the straightening frame 305 is needed to straighten the position of the PVC pipes on the pipe placement plate 105. The straightening frame 305 has four supports in the same vertical plane, with two supports forming a group. The supports are used to straighten the position of the PVC pipes on the two pipe placement plates 105 respectively, so that the two PVC pipes are in the same vertical plane. The clamping block 106 presses down on the PVC pipe with a force that prevents the PVC pipe from moving when no external force is applied. Therefore, when the straightening frame 305 is straightening the PVC pipe, it can cause a slight positional movement of the PVC pipe. After the straightening is completed, the motor 302 is started, which drives the straightening frame 305 to move upward and release the PVC pipe.

[0047] Furthermore, as a specific implementation method of this embodiment, such as Figure 15-17 As shown, the alignment plate 306 is a U-shaped plate. The two sides of the U-shaped plate are symmetrical about the heat-fusion device 6 and correspond vertically to the PVC pipes on the pipe placement plate 105. When manually placing the PVC pipes, the ends of the two PVC pipes that need to be heat-fused together are pressed against the two sides of the alignment plate 306 to ensure that the two PVC pipes have the same length entering the heat-fusion device 6. After the PVC pipes are pressed against the alignment plate 306, the motor 108 is started, the clamping block 106 clamps the PVC pipes, and then the cylinder is activated, driving the alignment plate 306 to move, allowing the PVC pipes to continue moving horizontally.

[0048] Specifically, the moving mechanism 4 is provided with a housing 401; a support plate 301 is fixedly installed on the housing 401; two sliding blocks 403 are symmetrically slidably installed on the housing 401; a slider 402 is fixedly installed on the sliding block 403; two fixed blocks 203 are respectively slidably installed on the two sliders 402; in this embodiment, the two ends of the fixed block 203 are elastically connected to the two ends of the slider 402 through spring 2, so that the fixed block 203 is located in the middle position of the slider 402 without the action of external force, which makes it easier to align the first alignment block 201 and the second alignment block 202.

[0049] To facilitate manual pushing of the sliding block 403, a horizontal slide rail is provided on the outer shell 401, and a push rod is provided at one end of the sliding block 403. The push rod is slidably installed on the slide rail, and the sliding block 403 is driven to slide horizontally by manually pushing the push rod.

[0050] Specifically, the timing mechanism 5 is provided with an hourglass 501 and a limiting block 505; the limiting block 505 and the hot-melting device 6 are located in the same vertical plane, and one end is fixedly connected to the outer shell 401, while the other end is slidably connected to a locking plate 508; the locking plate 508 is provided with locking heads on both the left and right sides of one end near the limiting block 505, and the other end is fixedly connected to the control plate 506; the control plate 506 is slidably mounted on the outer shell 401 and is connected to the limiting block 505 by a spring; the two hourglasses 501 are symmetrically rotated and mounted on the outer shell 401, located above both ends of the control plate 506, and are driven by a driving device mounted on the moving mechanism 4;

[0051] As a specific implementation method of this embodiment, such as Figure 11-12 As shown, the drive device includes a gear 502, a rack 504, and a connecting rod 507; the two connecting rods 507 are symmetrically and rotatably mounted on the housing 401, and one end of the connecting rod 507 is fixedly connected to the middle position of the hourglass 501, and the other end is fixedly connected to the gear 502; the two racks 504 are symmetrically and fixedly connected to any one of the moving blocks 403, and are intermittently engaged with the two gears 502 respectively.

[0052] Furthermore, each end of the hourglass 501 is equipped with a control rod 509 that is sealed and elastically slidably mounted; both ends of the hourglass 501 have through holes, and one end of the control rod 509 passes through the through hole and abuts against the control plate 506; the moving block 403 is provided with a second locking head, which is connected to the locking head on the locking plate 508 to fix the two moving blocks 403 on the locking plate 508; the two moving blocks 403 are elastically connected by a spring four; the hot melting time is controlled by the timing mechanism 5, eliminating the need for manual control of the docking time, freeing up manpower while allowing for precise control of the hot melting time.

[0053] The hot-melting device 6 is rotatably mounted on the support frame 301 and is driven by a motor that is fixedly mounted on the support frame 301.

[0054] Initially, the distance between the two moving blocks 403 and the limiting block 505 is the same. The two moving blocks 403 are manually pushed towards the limiting block 505 in the middle position, thus moving the PVC pipe on the pipe placement plate 105 towards the heat fusion device 6 in the middle position. After sliding a certain distance, the rack 504 installed on the moving block 403 meshes with the gear 502, and the moving block 403 continues to move, subsequently driving the gear 502 to rotate, thereby driving the connecting rod 507 to rotate, and then driving the hourglass 501 to rotate. When the two locking heads on the two moving blocks 403 are just engaged with the locking plate 508, the hourglass 501 rotates exactly 180 degrees. Simultaneously, the end of the PVC pipe on the pipe placement plate 105 that needs heat fusion is completely inserted into the heat fusion device 6. Under the action of the spring, the locking plate 508 locks the two moving blocks 403 at this time, stopping the further forward pushing of the two moving blocks 403.

[0055] At this time, sand leaks down into the lower part of the hourglass 501. When the hourglass on the control rod 509 reaches a certain weight, the sand presses down on the control rod 509, thereby causing the control plate 506 to move down, which in turn causes the clamping plate 508 to move down. After moving down a certain distance, the clamping plate 508 disengages from the clamping heads on the two moving blocks 403. Under the action of the spring, the two moving blocks 403 move to both sides. At this time, the moving blocks 403 drive the two PVC pipes to reset. Therefore, the hot-melting time of the two PVC pipes can be controlled by the hourglass 501, and no manual operation is required during the hot-melting waiting process, which reduces the labor intensity to a certain extent. After the hot-melting is completed, the moving blocks 403 will automatically drive the PVC pipes to detach from the hot-melting device 6.

[0056] After the PVC pipes are reset, motor three starts, driving the hot melt device 6 to rotate. Then, the two moving blocks 403 are manually pushed towards the center until the two PVC pipes are joined. At this point, the moving blocks 403 are at their maximum movable position. The operator simply pushes the moving blocks 403 to this maximum position and waits for the PVC pipes to be welded. After the PVC pipe hot melt welding is completed, the moving blocks 403 are released. The moving blocks 403 reset under the action of spring four, causing the two PVC pipes to move left and right. At this point, the two PVC pipes are welded. When the two PVC pipes separate under the action of the two moving blocks 403, the two PVC pipes... If the welding is not up to standard, and the two moving blocks 403 fail to reset because the two PVC pipes are already connected, the pipe welding is completed. The motor 108 is started, which drives the clamping block 106 to release the PVC pipes. The PVC pipes that have been heat-melted and welded are then manually removed. Simultaneously, after the clamping block 106 releases the PVC pipes, the two moving blocks 403 reset. After resetting to a certain distance, the second clamp on the two moving blocks 403 is caught by the clamping plate 508. The control plate 506 is pressed manually to reset the two moving blocks 403. The reset of the moving blocks 403 will drive the hourglass 501 to reset. Then the cylinder drives the alignment plate 306 to reset, and the motor drives the heat-melting device 6 to reset.

[0057] Working principle:

[0058] The first step is to manually place two PVC pipes on the pipe placement plate 105, and make the end of the PVC pipe that needs to be heat-melted welded tightly against the alignment plate 306. Start the motor 108 to drive the clamping block 106 to clamp the PVC pipes. Start the cylinder to drive the alignment plate 306 to move backward.

[0059] The second step is to start motor 302 to drive the straightening frame 305 to straighten the two PVC pipes in a horizontal position; after the straightening is completed, start motor 302 to reset the straightening frame 305.

[0060] The third step involves manually pushing the two moving blocks 403 to move. When the two moving blocks 403 are just locked onto the card plate 508, the movement stops, and the hot melt device 6 is started. When the timing mechanism 5 finishes timing, the two moving blocks 403 drive the two PVC pipes to reset.

[0061] Fourth step: Start motor three to drive the hot melt device 6, manually push the two moving blocks 403 to the maximum movable position, and wait until the welding of the two PVC pipes is completed;

[0062] Step 5: Loosen the two moving blocks 403, start the motor 108, drive the clamping block 106 to loosen the PVC pipe, manually remove the PVC pipe, start the cylinder, drive the alignment plate 306 to reset, start the motor three, drive the hot melt device 6 to reset, manually press the control plate 506, and the moving blocks 403 and hourglass 501 to reset.

[0063] The above are merely preferred embodiments of this example, but the scope of protection of this example is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this example, based on the technical solution and inventive concept of this example, should be covered within the scope of protection of this example.

Claims

1. A rapid and precise alignment device for hot-melt welding of PVC pipes, characterized in that, include: The system includes a pipe fixing mechanism (1), an alignment mechanism (2), a correction mechanism (3), a moving mechanism (4), a timing mechanism (5), a hot-melt device (6), and a control device. The alignment mechanism (2) is equipped with an alignment block 1 (201) and an alignment block 2 (202), which cooperate intermittently. The alignment mechanism (2) is slidably mounted on the moving mechanism (4) via the alignment block 1 (201) and the alignment block 2 (202). The moving mechanism (4) is fixedly mounted on the ground. The two pipe fixing mechanisms (1) are symmetrical about the hot-melt device (6) and are divided into two parts. The alignment block (201) and alignment block (202) are fixedly installed on the alignment block (1); the correction mechanism (3) is fixedly installed on the moving mechanism (4) corresponding to the PVC pipe on the pipe fixing mechanism (1) for position correction of the PVC pipe fixed on the pipe fixing mechanism (1); the hot melt device (6) is rotatably installed on the correction mechanism (3) and intermittently cooperates with the PVC pipe on the pipe fixing mechanism (1); the timing mechanism (5) is fixedly installed on the moving mechanism (4) to limit the hot melt welding process within a set time. The correction mechanism (3) is provided with a support frame (301), a correction frame (305) and an alignment plate (306); the support frame (301) is fixedly installed on the ground or on the moving mechanism (4); the correction frame (305) is slidably installed on the support frame (301) and driven by a motor (302) fixedly installed on the support frame (301); the alignment plate (306) is provided with baffles on both sides, and the baffles on both sides are symmetrical about the hot melt device (6), and the baffles on the alignment plate (306) correspond to the PVC pipes fixed on the pipe fixing mechanism (1); the alignment plate (306) is slidably installed on the support frame (301) and driven by a cylinder fixedly installed on the support frame (301); The control device controls the operation of the rapid and precise alignment device for hot-melt welding of the entire PVC pipe, excluding itself.

2. The rapid and precise alignment device for hot-melt welding of PVC pipes according to claim 1, characterized in that, The pipe fixing mechanism (1) is provided with a pipe placement plate (105) and a fixing plate (107); the pipe placement plate (105) is fixedly installed on the fixing plate (107); two threaded rods (101) are slidably installed on the pipe placement plate (105) and driven by a motor (108) fixedly installed on the pipe placement plate (105); a clamping block (106) is fixedly connected to the bottom of the threaded rod (101); the fixing plates (107) on the two pipe fixing mechanisms (1) are respectively fixedly installed on the alignment block one (201) and the alignment block two (202).

3. The rapid and precise alignment device for hot-melt welding of PVC pipes according to claim 2, characterized in that, The alignment mechanism (2) is also provided with a fixing block (203); the first alignment block (201) and the second alignment block (202) are respectively fixedly installed on the two fixing blocks (203); the bottom end of the fixing block (203) is slidably installed on the moving mechanism (4), and the upper end is fixedly connected to the fixing plate (107); the right side of the first alignment block (201) is provided with a slope one, and the left side of the second alignment block (202) is provided with a slope two that cooperates with the slope one.

4. The rapid and precise alignment device for hot-melt welding of PVC pipes according to claim 3, characterized in that, The moving mechanism (4) is provided with a housing (401); the support frame (301) is fixedly installed on the housing (401); two moving blocks (403) are symmetrically slidably installed on the housing (401); a slider (402) is fixedly installed on the moving block (403); the two fixed blocks (203) are respectively slidably installed on the two sliders (402).

5. The rapid and precise alignment device for hot-melt welding of PVC pipes according to claim 4, characterized in that, The outer casing (401) is provided with a horizontal slide rail, and one end of the moving block (403) is provided with a push rod, which is slidably mounted on the slide rail.

6. The rapid and precise alignment device for hot-melt welding of PVC pipes according to claim 4, characterized in that, The timing mechanism (5) is provided with an hourglass (501) and a limiting block (505); the limiting block (505) and the hot-melt device (6) are located in the same vertical plane, and one end is fixedly connected to the outer shell (401), and the other end is slidably connected to a locking plate (508); the locking plate (508) is provided with locking heads on both the left and right sides of the end near the limiting block (505), and the other end is fixedly connected to the control plate (506); the control plate (506) is slidably mounted on the outer shell (401) and elastically connected to the limiting block (505); the two hourglasses (501) are symmetrically rotated and mounted on the outer shell (401). 1) It is located above both ends of the control plate (506) and driven by a drive device installed on the moving mechanism (4); a control rod (509) is installed in a closed elastic sliding manner at both ends of the hourglass (501); through holes are opened on the bottom surface of both ends of the hourglass (501), and one end of the control rod (509) passes through the through hole and abuts against the control plate (506); a second locking head is provided on the moving block (403), and the second locking head is connected to the locking head on the plate (508) to fix the two moving blocks (403) on the plate (508); the two moving blocks (403) are elastically connected.

7. The rapid and precise alignment device for hot-melt welding of PVC pipes according to claim 6, characterized in that, The driving device includes a gear (502), a rack (504), and a connecting rod (507); the two connecting rods (507) are symmetrically rotated and mounted on the outer casing (401), and one end of the connecting rod (507) is fixedly connected to the middle position of the hourglass (501), and the other end is fixedly connected to the gear (502); the two racks (504) are symmetrically fixedly connected to any one of the moving blocks (403), and are intermittently engaged with the two gears (502) respectively.

8. The rapid and precise alignment device for hot-melt welding of PVC pipes according to claim 6, characterized in that, The hot melt device (6) is rotatably mounted on the support frame (301) and is driven by a motor fixedly mounted on the support frame (301).

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