Hot melting connecting device for PVC (polyvinyl chloride) pipeline

Abstract

The invention relates to the technical field of PVC (polyvinyl chloride) pipeline connection, in particular to a hot melting connection device for PVC pipelines, which comprises an L-shaped base and an electric support mounted on the L-shaped base, a heating head is mounted on the electric support, and electric placing seats are symmetrically mounted on the L-shaped base and used for placing the PVC pipelines. The electric placement seat is started to drive the PVC pipeline to move, so that the end of the PVC pipeline is close to the corrugated spray pipe and the annular spray pipe, an external air pump is started to discharge air into the corrugated spray pipe, and the corrugated spray pipe sprays the air at a high speed to form high-pressure airflow to remove impurities attached to the inner side of the PVC pipeline; part of air in the corrugated spray pipe is discharged into the annular spray pipe through the hose, the annular spray pipe sprays out the air at a high speed to form high-pressure airflow to remove impurities attached to the outer side of the PVC pipeline, and the corrugated spray pipe and the annular spray pipe move in a reciprocating mode to comprehensively remove the impurities in a connection area so as to prevent the impurities from affecting hot melting connection. Therefore, the hot melting connection quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of PVC pipe connection, in particular to a hot-melt connection device for PVC pipes. Background Art

[0002] During the installation and maintenance of PVC pipes, hot melt connection technology is widely used due to its efficient and reliable connection performance. The hot melt connection device heats the ends of the PVC pipes to a molten state, then quickly docks and solidifies to form an integrated connection structure, thereby ensuring the sealing and strength of the pipeline system.

[0003] The Chinese patent with publication number CN117885357A discloses a PVC pipe hot-melt connection device, including a sliding table, a handle fixedly installed on the sliding table, a control component provided on the sliding table, and a static support table and a dynamic support table, both of which are fixedly installed with a clamping part, the static support table is fixedly matched with the sliding table, the dynamic support table is slidably matched with the sliding table, a heating screw and a one-way friction sleeve are rotatably installed on the static support table, and the one-way friction sleeve and the heating screw are connected by a transmission belt. Although the above patent can perform hot-melt connection on PVC pipes, the cleanliness of the pipe end directly affects the quality of the hot-melt connection because the PVC material is more sensitive to impurities and pollutants. In the actual construction environment, dust, oil, debris and other impurities are easily attached to the connection pipe mouth of the PVC pipe. Existing hot-melt connection devices often lack an effective mechanism for removing impurities from the ends of pipes when automatically performing docking tasks. If there are impurities such as dust and oil on the surface of pipes or fittings and they are not cleaned in time, these pollutants may be melted into the interior of the pipe material during the heating process, resulting in defects at the welding interface and affecting the quality of the hot-melt connection. These defects will not only weaken the strength of the connection, but may also become potential leakage points in the future pipeline system, seriously affecting the overall performance and safety of the pipeline system.

[0004] The present invention aims to solve the problems existing in the above patents. To this end, a hot-melt connection device for PVC pipes is proposed, which can remove impurities at the welding ends of PVC pipes before hot-melt connection and improve the quality of hot-melt connection. Summary of the invention

[0005] In order to overcome the disadvantage that dust, oil and other impurities exist on the surface of pipes or pipe fittings and are not cleaned in time, these pollutants may be melted into the interior of the pipe material during the heating process, resulting in defects at the welding interface and affecting the quality of the hot-melt connection, the present invention provides a hot-melt connection device for PVC pipes, which can remove impurities at the welding end of the PVC pipe and then perform hot-melt connection, thereby improving the quality of the hot-melt connection.

[0006] The present invention is achieved through the following technical solutions: A hot-melt connection device for PVC pipes comprises an L-shaped base and an electric bracket mounted on the L-shaped base, a heating head is mounted on the electric bracket, an electric placement seat is symmetrically mounted on the L-shaped base for placing the PVC pipe, an electric clamp is arranged on the electric placement seat for clamping and fixing the PVC pipe, and further comprises a swing frame, a guide pipe, a corrugated nozzle, an annular nozzle, a drive frame, a hose, a drive assembly, a trigger assembly and a positioning assembly, the positioning assembly is mounted between the L-shaped base and the electric placement seat for positioning the placement of the PVC pipe, a swing frame is rotatably connected to the bottom of the L-shaped base, a guide pipe is fixedly connected to the swing frame laterally, a drive frame is symmetrically slidably connected to the guide pipe, and the drive frame An annular nozzle is fixedly connected to the annular nozzle, and a hose is symmetrically connected to the annular nozzle. The tail end of the hose passes through the driving frame. A corrugated nozzle fixedly connected to the driving frame is fixedly connected to the inner side of the guide tube. The jet end of the corrugated nozzle is located outside the guide tube, and the end of the corrugated nozzle and the annular nozzle are in the same vertical plane. The corrugated nozzle is connected to the hose. The driving component is installed on the top of the guide tube. The corrugated nozzle and the annular nozzle are used to spray air at high speed to form a high-pressure airflow. Then the driving component drives the end of the corrugated nozzle and the annular nozzle to move along the length direction of the PVC pipe, so that the corrugated nozzle and the annular nozzle use the high-pressure airflow to remove impurities on the connection position of the PVC pipe. The trigger component is installed on the L-shaped base to drive the swing frame to swing.

[0007] Further explanation, the electric clamp consists of a clamping block, a slotted hole, a sliding rod, an arc-shaped rack, a slotted plate and an electric gear. The slotted holes are symmetrically opened on both sides of the electric placement seat, the sliding rod is slidably connected between the corresponding slotted holes on the left and right sides, the clamping block is fixed on the sliding rod, the arc-shaped rack is slidably connected to the inner side of the electric placement seat, the slotted plate is symmetrically fixed to the inner side of the arc-shaped rack, the inner side of the slotted plate is slidably connected to the sliding rod, the electric gear is installed on the electric placement seat, and the electric gear is meshed with the arc-shaped rack.

[0008] Further explanation, the drive assembly includes a screw rod symmetrically connected to the top of the guide tube, the screw rod is threadedly connected to the drive frame to drive the drive frame to move, a dual-axis motor is installed on the swing frame, and the output shaft end of the dual-axis motor is fixedly connected to the end of the screw rod.

[0009] Further explanation, the trigger assembly includes a fixed plate fixedly connected to the L-shaped base, an L-shaped contact plate slidingly penetrates the fixed plate, the top of the L-shaped contact plate contacts the bottom end of the electric bracket, the bottom end of the L-shaped contact plate contacts the rear side of the swing frame, a guide rod slidingly penetrates the fixed plate, and a connecting spring sleeved on the guide rod is connected between the end of the guide rod and the L-shaped contact plate.

[0010] Further explanation, the positioning assembly includes a fixed seat fixed to the bottom of the electric placement seat, the end of the fixed seat is rotatably connected to an L-shaped positioning rod for positioning the position of the PVC pipe, a rotating shaft is rotatably connected to the fixed seat, the front end of the rotating shaft is connected to the shaft of the L-shaped positioning rod through a gear transmission, the rear end of the rotating shaft is fixedly sleeved with a spur gear, and the outer side surface of the L-shaped base is symmetrically fixed with a fixed rack meshing with the spur gear.

[0011] Further explanation, the hot-melt connection device for PVC pipes also includes a dust suction component, which includes a high-temperature resistant elastic cloth fixedly connected to both sides of the electric bracket, which is used to block the smoke and dust generated by the hot-melt connection, and the electric bracket is symmetrically and evenly spaced along the circumferential direction. The tail end of the swing rod is fixedly connected to the outer side of the high-temperature resistant elastic cloth to drive the high-temperature resistant elastic cloth to open and close, and annular exhaust pipes are symmetrically fixed on the electric bracket, and the exhaust end of the annular exhaust pipe is located in the high-temperature resistant elastic cloth. A connecting pipe is connected between the annular exhaust pipes, and the air outlet end of the connecting pipe passes through the electric bracket. A pushing assembly is arranged between the electric bracket and the swing rod to drive the swing rod to swing.

[0012] Further explanation, the pushing assembly includes a double-rod cylinder symmetrically installed on an electric bracket, and a trigger frame is fixedly connected between the ends of the telescopic rod on the left side of the double-rod cylinder and the ends of the telescopic rod on the right side. A waist-shaped hole is opened on the swing rod, and a connecting plate is slidably connected to the inside of the waist-shaped hole. The connecting plate is rotatably connected to the tail end of the trigger frame.

[0013] As a further explanation, the hot-melt connection device for PVC pipes also includes a rubber pad fixed to the clamping block for protecting the PVC pipes.

[0014] The beneficial effects of the present invention are: 1. Place the PVC pipe in the electric placement seat and clamp it with the clamping block. Then start the electric placement seat to drive the PVC pipe to move so that the end is close to the corrugated nozzle and the annular nozzle. Start the external air pump to discharge air into the corrugated nozzle. The corrugated nozzle sprays air at high speed to form a high-pressure airflow to remove impurities attached to the inside of the PVC pipe. Part of the air in the corrugated nozzle is discharged into the annular nozzle through a hose. The annular nozzle sprays air at high speed to form a high-pressure airflow to remove impurities attached to the outside of the PVC pipe. The corrugated nozzle and the annular nozzle move back and forth to completely remove impurities in the connection area to prevent impurities from affecting the hot-melt connection, thereby improving the quality of the hot-melt connection.

[0015] 2. Under the action of the L-shaped positioning rod, whenever the PVC pipe is placed in the electric placement seat, the L-shaped positioning rod contacts the end of the PVC pipe, and the L-shaped positioning rod positions the PVC pipe so that the positions of the PVC pipes on the left and right sides are consistent to prevent the position of the PVC pipe from deviating and affecting the hot-melt connection.

[0016] 3. Under the action of the high-temperature resistant elastic cloth and the annular exhaust pipe, whenever the end of the PVC pipe is heated and melted by the heating head and smoke appears, the high-temperature resistant elastic cloth will block the smoke and the annular exhaust pipe will extract the smoke, which can prevent the smoke generated during the melting process from affecting the surrounding environment, thereby ensuring a good working environment around. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the electric placement seat of the present invention.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the clamping block and the sliding rod of the present invention.

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the arc-shaped rack, the slotted plate and the electric gear of the present invention.

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the annular nozzle and the corrugated nozzle of the present invention.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the corrugated nozzle and the air intake pipe of the present invention.

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the positioning component of the present invention.

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the dust collection component of the present invention.

[0025] Fig. 9 It is a schematic diagram of the three-dimensional structure of the annular exhaust pipe and the connecting pipe of the present invention.

[0026] Fig.10 It is a schematic diagram of the three-dimensional structure of the rubber pad of the present invention.

[0027] Description of reference numerals: 1. L-shaped base, 2. electric bracket, 3. heating head, 4. electric placement seat, 5. clamping block, 51. slotted hole, 52. slide bar, 53. arc rack, 54. slotted plate, 55. electric gear, 6. swing frame, 7. guide tube, 8. corrugated nozzle, 9. annular nozzle, 10. driving frame, 101. hose, 11. dual-axis motor, 111. screw, 12. L-shaped contact plate, 121. connecting spring, 122. guide rod, 123. fixing plate, 13. fixing seat, 131. L-shaped positioning rod, 132. rotating shaft, 133. spur gear, 134. fixed rack, 14. swing rod, 141. high temperature resistant elastic cloth, 142. annular exhaust pipe, 143. connecting pipe, 144. double-rod cylinder, 145. trigger frame, 146. waist-shaped hole, 147. connecting plate, 15. rubber pad. DETAILED DESCRIPTION

[0028] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0029] Example: A hot melt connection device for PVC pipes, see Figure 1-Figure 7As shown, it includes an L-shaped base 1 and an electric bracket 2 installed in the middle of the upper part of the L-shaped base 1, a heating head 3 is installed on the upper part of the electric bracket 2, and an electric placement seat 4 is symmetrically installed on the left and right sides of the L-shaped base 1. The electric placement seat 4 can place the PVC pipe. An electric clamp is arranged on the electric placement seat 4. When the electric clamp is in operation, the electric clamp can clamp and fix the PVC pipe. The electric clamp consists of a clamping block 5, a straight hole 51, a slide bar 52, an arc-shaped rack 53, a slotted plate 54 and an electric gear 55. The straight hole 51 is symmetrically opened on the left and right sides of the electric placement seat 4, and the slide bar 52 is slidably connected to the left and right sides. Between the corresponding straight holes 51, a clamping block 5 is fixedly connected to the middle of the slide bar 52, an arc-shaped rack 53 is slidably connected to the inner side of the electric placement seat 4, a slotted plate 54 is symmetrically fixed to the inner side of the arc-shaped rack 53, the inner side of the slotted plate 54 is slidably connected to the slide bar 52, an electric gear 55 is installed on the electric placement seat 4, and the electric gear 55 is meshed with the arc-shaped rack 53. It also includes a swing frame 6, a guide tube 7, a corrugated nozzle 8, an annular nozzle 9, a drive frame 10, a hose 101, a drive assembly, a trigger assembly and a positioning assembly. The positioning assembly is installed between the L-shaped base 1 and the electric placement seat 4. When the positioning assembly is in operation, the positioning assembly The parts can realize the positioning of the PVC pipe. The middle of the bottom of the L-shaped base 1 is rotatably connected to a swing frame 6. The upper part of the swing frame 6 is fixedly connected with a guide pipe 7. The guide pipe 7 is symmetrically slidably connected with a driving frame 10. The driving frames 10 on the left and right sides are fixedly connected with annular nozzles 9. The annular nozzles 9 on the left and right sides are symmetrically connected with hoses 101. The tail ends of the hoses 101 penetrate the driving frame 10. A corrugated nozzle 8 is fixedly connected to the middle part of the inner side of the guide pipe 7. The left and right sides of the corrugated nozzle 8 are respectively fixedly connected to the middle of the left and right driving frames 10. The jet ends of the corrugated nozzle 8 on the left and right sides are both located outside the guide pipe 7. The end of the corrugated nozzle 8 and the annular nozzle 9 are in the same vertical plane, the corrugated nozzle 8 is fixedly connected and communicated with the tail end of the hose 101, the driving assembly is installed on the top of the guide tube 7, the corrugated nozzle 8 and the annular nozzle 9 are used to spray air at high speed to form a high-pressure airflow, and then the driving assembly drives the end of the corrugated nozzle 8 and the annular nozzle 9 to move along the length direction of the PVC pipe, so that the corrugated nozzle 8 and the annular nozzle 9 use the high-pressure airflow to remove impurities on the connection position of the PVC pipe, and the trigger assembly is installed on the L-shaped base 1. When the trigger assembly is in operation, the trigger assembly can drive the swing frame 6 to swing.

[0030] See also Figure 5As shown, the driving assembly includes a dual-axis motor 11 and a screw 111. The top of the guide tube 7 is symmetrically rotated with the screw 111. The screws 111 on the left and right sides are respectively threadedly connected to the upper parts of the left and right driving frames 10. When the screw 111 rotates, the screw 111 can drive the driving frame 10 to move. The dual-axis motor 11 is installed on the top of the swing frame 6, and the output shaft ends on the left and right sides of the dual-axis motor 11 are respectively fixedly connected to the inner ends of the left and right screws 111.

[0031] See also Figure 5 As shown, the trigger assembly includes an L-shaped contact plate 12, a connecting spring 121, a guide rod 122 and a fixed plate 123. The fixed plate 123 is fixedly connected to the middle of the rear side of the L-shaped base 1, and the L-shaped contact plate 12 is slidably penetrated on the rear side of the fixed plate 123. The top of the L-shaped contact plate 12 contacts the bottom end of the electric bracket 2, and the bottom end of the L-shaped contact plate 12 contacts the rear side of the swing frame 6. The guide rod 122 is slidably penetrated on the rear side of the fixed plate 123, and a connecting spring 121 is connected between the top end of the guide rod 122 and the inner top of the L-shaped contact plate 12, and the connecting spring 121 is sleeved on the guide rod 122.

[0032] See also Figure 7 As shown, the positioning assembly includes a fixed seat 13, an L-shaped positioning rod 131, a rotating shaft 132, a spur gear 133 and a fixed rack 134. The bottoms of the left and right electric placement seats 4 are fixedly connected with the fixed seats 13, and the ends of the left and right fixed seats 13 close to each other are rotatably connected with the L-shaped positioning rod 131. When the PVC pipe is placed in the electric placement seat 4, the L-shaped positioning rod 131 can realize the positioning of the placement of the PVC pipe. The left and right fixed seats 13 are rotatably connected with the rotating shaft 132, the front end of the rotating shaft 132 is connected to the shaft of the L-shaped positioning rod 131 through a gear transmission, and the rear end of the rotating shaft 132 is fixedly sleeved with a spur gear 133. The outer bottom of the L-shaped base 1 is symmetrically fixed with fixed racks 134, and the fixed racks 134 on the left and right sides are respectively meshed with the spur gears 133 on the left and right sides.

[0033] Initially, the corrugated nozzle 8 is externally connected to the air pump, and the connecting spring 121 is in a compressed state. First, the two PVC pipes that need to be hot-melt connected are respectively placed in the left and right electric placement seats 4, and the connecting ends of the PVC pipes are made to contact the L-shaped positioning rod 131. The L-shaped positioning rod 131 positions the position of the PVC pipes so that the positions of the PVC pipes on the left and right sides are consistent and in a precise connection position to prevent the position of the PVC pipes from deviating and affecting the hot-melt connection. Then, the electric gear 55 is started to rotate forward to drive the arc-shaped rack 53 to rotate forward, and the arc-shaped rack 53 rotates forward to drive the slotted plate 54 to rotate forward. The slotted plate 54 rotates forward to drive the front and rear sliding bars 52 to move in a direction close to each other, and the front and rear sliding bars 52 move in a direction close to each other, driving the front and rear clamping blocks 5 The two sides of the PVC pipe 130 are moved in a direction approaching each other, and the front and rear clamping blocks 5 are in contact with the PVC pipe. The front and rear clamping blocks 5 clamp the PVC pipe and fix it. The electric gear 55 is turned off, and then the left and right electric placement seats 4 are started to move in a direction approaching each other. The electric placement seats 4 drive the left and right L-shaped positioning rods 131 and the rotating shaft 132 to move in a direction approaching each other through the fixed seat 13. The rotating shaft 132 drives the left and right spur gears 133 to move in a direction approaching each other. The fixed rack 134 drives the moving spur gear 133 to rotate. The rotation of the spur gear 133 drives the rotating shaft 132 to rotate. The rotating shaft 132 drives the left and right L-shaped positioning rods 131 to swing downward by ninety degrees through gear transmission. The L-shaped positioning rods 131 swing downward by ninety degrees and disengage from the PVC pipe. At this time, the spur gear 133 continues to move and disengages from the fixed rack 134. At the same time, the electric placement seats 4 on the left and right sides continue to move through the clamping block 5 to drive the PVC pipes on the left and right sides to move towards each other. When the PVC pipes are close to the annular nozzle 9 and the corrugated nozzle 8, the electric placement seats 4 on the left and right sides are closed, and the air outlet end of the corrugated nozzle 8 faces the inside of the PVC pipe, and the air outlet end of the annular nozzle 9 faces the outside of the PVC pipe. Then, the external air pump is started to discharge air into the corrugated nozzle 8. The corrugated nozzle 8 sprays air at high speed into a high-pressure airflow. The high-pressure airflow contacts the inside of the PVC pipe, and the high-pressure airflow removes impurities attached to the inside of the PVC pipe. At the same time, the corrugated nozzle 8 also discharges part of the air into the hose 101. The air in the hose 101 The air is discharged into the annular nozzle 9, and the annular nozzle 9 ejects air at high speed to form a high-pressure airflow. The ejected high-pressure airflow contacts the outside of the PVC pipe, and the high-pressure airflow removes the impurities attached to the outside of the PVC pipe. Then the double-axis motor 11 is started to rotate alternately forward and reverse, and the double-axis motor 11 drives the screws 111 on the left and right sides to rotate alternately forward and reverse. The screws 111 drive the driving frames 10 on the left and right sides to move back and forth in the opposite direction. The driving frames 10 drive the ends of the corrugated nozzles 8 on the left and right sides and the annular nozzles 9 on the left and right sides to move back and forth in the opposite direction. The distance of the reciprocating movement of the corrugated nozzles 8 and the annular nozzles 9 is the length of the area of ​​the hot-melt connection of the PVC pipe, which comprehensively removes the impurities at the hot-melt connection position of the end of the PVC pipe to prevent the impurities from affecting the hot-melt connection.Thereby improving the quality of hot-melt connection, when the impurities on the hot-melt connection position of the PVC pipe are cleaned up, turn off the dual-axis motor 11, the dual-axis motor 11 stops driving the screw 111 to rotate alternately forward and reverse, the drive frame 10 stops driving the end of the corrugated nozzle 8 and the annular nozzle 9 to move, and at the same time turn off the external air pump, the corrugated nozzle 8 and the annular nozzle 9 stop spraying air, and then start the electric bracket 2 to swing downward to drive the heating head 3 to swing downward, the electric bracket 2 swings downward so that the rear side swings upward, the rear side of the electric bracket 2 swings upward and breaks contact with the L-shaped contact plate 12, due to the action of the connecting spring 121, the L-shaped contact plate 12 moves upward and resets to break contact with the rear side of the swing frame 6, and due to the action of gravity, the front side of the swing frame 6 swings downward so that the rear side swings upward The guide tube 7 swings downward, drives the corrugated nozzle 8 and the driving frame 10 to swing downward, and the driving frame 10 drives the annular nozzle 9 to swing downward to the bottom of the PVC pipe, thus avoiding the moving position of the PVC pipe. Then the heating head 3 continues to swing downward to the middle of the PVC pipes on the left and right sides, and the electric bracket 2 is closed. The heating head 3 stops swinging downward, and the electric placement seats 4 on the left and right sides are started again to drive the PVC pipes on the left and right sides to move towards each other. The end of the right PVC pipe is inserted into the inner side of the right end of the heating head 3 and the end of the left PVC pipe is sleeved on the left end of the heating head 3. The electric placement seat 4 is closed, the PVC pipe stops moving, and the heating head 3 can be started to heat the left PVC pipe. The inner side of the end of the right PVC pipe and the outer side of the end of the right PVC pipe are melted synchronously (one melts the outer surface, and the other melts the inner surface to increase the diameter. It should be noted that melting does not turn the PVC pipe into liquid, but softens it by heating). After the hot melting is completed, the heating head 3 is turned off, and the electric placement seat 4 is started to drive the PVC pipes on the left and right sides to move away from each other and break contact with the heating head 3. The electric placement seat 4 is turned off, and the electric bracket 2 is started to swing upward to drive the heating head 3 to swing upward to a suitable position. The electric bracket 2 swings upward so that the rear side swings downward and contacts with the L-shaped contact plate 12. The electric bracket 2 is turned off, and the electric placement seat 4 is started again to drive the PVC pipes on the left and right sides to move towards each other, so that the PVC pipes on the left and right sides The butt joint is performed, and the butt joint positions of the PVC pipes on the left and right sides are cooled and solidified to complete the hot-melt connection. Then, the electric gear 55 is started to reverse and drive the arc rack 53 to reverse and reset. The arc rack 53 is reset to drive the slotted plate 54 to reverse and reset. The slotted plate 54 drives the front and rear clamping blocks 5 to move and reset in the direction away from each other through the sliding rod 52. The clamping block 5 loosens the PVC pipe, and then the connected PVC pipe is removed from the electric placement seat 4. Then, the left and right electric placement seats 4 are started to move and reset in the direction away from each other. The electric placement seat 4 drives the left and right L-shaped positioning rods 131 and the rotating shaft 132 to move and reset in the direction away from each other through the fixed seat 13. The reset of the rotating shaft 132 drives the left and right spur gears 133 to move and reset in the direction away from each other.The spur gear 133 is reset and meshed with the fixed rack 134. The fixed rack 134 drives the moving spur gear 133 to rotate in the opposite direction to reset. The spur gear 133 drives the rotating shaft 132 to rotate in the opposite direction to reset. The rotating shaft 132 drives the L-shaped positioning rod 131 to swing upward and reset through gear transmission. Finally, the electric bracket 2 is started to swing upward to drive the heating head 3 to swing upward and reset. The electric bracket 2 swings and resets to drive the L-shaped contact plate 12 to move downward and reset. The connecting spring 121 is compressed. The L-shaped contact plate 12 moves downward to drive the rear side of the swing frame 6 to swing downward and reset. The rear side of the swing frame 6 swings downward to make the front side swing upward and reset. The swing frame 6 drives the guide tube 7 to swing upward and reset, which makes the annular nozzle 9 and the corrugated nozzle 8 swing upward and reset. This is repeated, and the two PVC pipes can be continuously hot-melted together.

[0034] See also Figure 8 and Fig. 9 As shown, the hot-melt connection device for PVC pipes also includes a dust collection component installed between the electric bracket 2 and the heating head 3, and the dust collection component includes a swing rod 14, a high-temperature resistant elastic cloth 141, an annular exhaust pipe 142, a connecting pipe 143 and a pushing component. The upper parts of the left and right sides of the electric bracket 2 are fixedly connected with the high-temperature resistant elastic cloth 141 along the circumferential direction. When the PVC pipe is hot-melt connected, the high-temperature resistant elastic cloth 141 can block the smoke and dust generated by the hot-melt connection. The upper part of the electric bracket 2 is symmetrically and evenly spaced along the circumferential direction. The tail ends of the left and right swing rods 14 are respectively fixedly connected to the outer sides of the left and right high-temperature resistant elastic cloth 141. When the swing rod 14 swings, the swing rod 14 can drive the high-temperature resistant elastic cloth 141 to open and close. The upper part of the electric bracket 2 is symmetrically and fixedly connected with annular exhaust pipes 141. The air pipe 142, the air extraction end of the annular air extraction pipe 142 is located in the high-temperature resistant elastic cloth 141, and a connecting pipe 143 is connected between the annular air extraction pipes 142 on the left and right sides. The air outlet end of the connecting pipe 143 passes through the electric bracket 2, and a pushing component is arranged between the electric bracket 2 and the swing rod 14. When the pushing component is in operation, the pushing component can drive the swing rod 14 to swing; the pushing component includes a double-rod cylinder 144, a trigger frame 145 and a connecting plate 147. The double-rod cylinder 144 is symmetrically installed on the upper part of the electric bracket 2, and the trigger frame 145 is fixedly connected between the telescopic rod ends on the left side of the two double-rod cylinders 144 and between the telescopic rod ends on the right side. A waist-shaped hole 146 is opened on the swing rod 14, and a connecting plate 147 is slidably connected to the inner side of the waist-shaped hole 146. The tail ends of the left and right connecting plates 147 are respectively rotatably connected to the left and right trigger frames 145.

[0035] Initially, the connecting pipe 143 is connected to an external vacuum pump. When the right PVC pipe end is inserted into the inner side of the right end of the heating head 3 and the left PVC pipe end is sleeved on the outer side of the left end of the heating head 3, the double-rod cylinder 144 is started. The telescopic rod of the double-rod cylinder 144 shortens and drives the trigger frames 145 on the left and right sides to move towards each other. The trigger frames 145 drive the connecting plates 147 on the left and right sides to move towards each other. The connecting plates 147 drive the swing rods 14 on the left and right sides to swing inwards through the waist-shaped holes 146. The inward swing of the swing rods 14 drives the high-temperature resistant elastic cloth 141 to swing inwards and contact with the PVC pipe. The double-rod cylinder 144 is closed, and the high-temperature resistant elastic cloth 141 covers the end of the PVC pipe. Then the heating head 3 is started to melt the PVC pipe. The smoke and dust generated during the melting process are blocked by the high-temperature resistant elastic cloth 141, and the external vacuum pump is started again. The vacuum pump is connected, and the vacuum pump evacuates the annular vacuum pipe 142 through the connecting pipe 143, so that the annular vacuum pipe 142 is in a negative pressure state, and the annular vacuum pipe 142 draws the smoke generated during the melting process into the connecting pipe 143, and the smoke in the connecting pipe 143 is sucked away and collected by the vacuum pump. When the end of the PVC pipe is melted, the heating head 3 is turned off, and then the vacuum pump is turned off, and the annular vacuum pipe 142 stops evacuating, and the telescopic rod of the double-rod cylinder 144 is started to extend to drive the trigger racks 145 on the left and right sides to move away from each other and reset. The trigger rack 145 resets and drives the swing rod 14 to swing upward and reset through the connecting plate 147 and the waist-shaped hole 146. The swing rod 14 resets and drives the high-temperature resistant elastic cloth 141 to swing outward and open and reset. The high-temperature resistant elastic cloth 141 resets and breaks contact with the PVC pipe, and the double-rod cylinder 144 is closed. In this way, the smoke generated during the melting process can be prevented from affecting the surrounding environment, thereby ensuring a good working environment around.

[0036] See also Fig.10 As shown, the hot-melt connection device for PVC pipes also includes a rubber pad 15. The two clamping blocks 5 are fixed with the rubber pad 15, and the rubber pad 15 can protect the PVC pipe.

[0037] When the front and rear clamping blocks 5 move toward each other, the clamping blocks 5 drive the front and rear rubber pads 15 to move toward each other, and the rubber pads 15 move to contact the PVC pipe, and the clamping blocks 5 clamp and fix the PVC pipe through the rubber pads 15, and the rubber pads 15 provide buffer protection for the PVC pipe. When the clamping blocks 5 are reset to release the PVC pipe, the clamping blocks 5 drive the rubber pads 15 to move and reset. In this way, the clamping blocks 5 can be prevented from violently contacting the PVC pipe to cause damage to the surface of the PVC pipe, thereby ensuring the safety of the PVC pipe clamping.

[0038] Finally, it is necessary to point out that the above content is only used to help understand the technical solution of the present invention and cannot be understood as limiting the scope of protection of the present invention; non-essential improvements and adjustments made by technical personnel in the field of technology based on the above content of the present invention are all within the scope of protection required by the present invention.

Claims

1. A hot melt connection device for PVC pipes, comprising an L-shaped base (1) and an electric bracket (2) mounted on the L-shaped base (1), a heating head (3) mounted on the electric bracket (2), an electric placement seat (4) symmetrically mounted on the L-shaped base (1) for placing the PVC pipe, an electric clamp disposed on the electric placement seat (4) for clamping and fixing the PVC pipe, characterized in that: The utility model also comprises a swing frame (6), a guide pipe (7), a corrugated nozzle (8), an annular nozzle (9), a driving frame (10), a hose (101), a driving assembly, a trigger assembly and a positioning assembly. The positioning assembly is installed between the L-shaped base (1) and the electric placement seat (4) and is used to position the placement of the PVC pipe. The bottom of the L-shaped base (1) is rotatably connected to the swing frame (6). The guide pipe (7) is fixedly connected to the swing frame (6) in a transverse manner. The driving frame (10) is symmetrically slidably connected to the guide pipe (7). The driving frame (10) is fixedly connected to the annular nozzle (9). The hose (101) is symmetrically connected to the annular nozzle (9). The rear end of the hose (101) passes through the driving frame (10). The inner side of the guide pipe (7) is fixedly connected to the driving frame. (10) a fixedly connected bellows nozzle (8), the jet end of the bellows nozzle (8) is located outside the guide tube (7), the end of the bellows nozzle (8) and the annular nozzle (9) are in the same vertical plane, the bellows nozzle (8) is connected to the hose (101), the driving assembly is installed on the top of the guide tube (7), the bellows nozzle (8) and the annular nozzle (9) are used to eject air at high speed to form a high-pressure airflow, and then the driving assembly drives the end of the bellows nozzle (8) and the annular nozzle (9) to move along the length direction of the PVC pipe, so that the bellows nozzle (8) and the annular nozzle (9) use the high-pressure airflow to remove impurities on the connection position of the PVC pipe, and the trigger assembly is installed on the L-shaped base (1) and is used to drive the swing frame (6) to swing.

2. A hot melt connection device for PVC pipes according to claim 1, characterized in that: The electric clamp is composed of a clamping block (5), a slotted hole (51), a slide bar (52), an arc-shaped rack (53), a slotted plate (54) and an electric gear (55). The slotted hole (51) is symmetrically opened on both sides of the electric placement seat (4). The slide bar (52) is slidably connected between the slotted holes (51) corresponding to the left and right sides. The clamping block (5) is fixedly connected to the slide bar (52). The arc-shaped rack (53) is slidably connected to the inner side of the electric placement seat (4). The slotted plate (54) is symmetrically fixedly connected to the inner side of the arc-shaped rack (53). The inner side of the slotted plate (54) is slidably connected to the slide bar (52). The electric gear (55) is installed on the electric placement seat (4). The electric gear (55) is meshed with the arc-shaped rack (53).

3. A hot melt connection device for PVC pipes according to claim 2, characterized in that: The driving assembly comprises a screw rod (111) symmetrically rotatably connected to the top of the guide tube (7), the screw rod (111) being threadedly connected to the driving frame (10) to drive the driving frame (10) to move, and a double-axis motor (11) is installed on the swing frame (6), and the output shaft end of the double-axis motor (11) is fixedly connected to the end of the screw rod (111).

4. A hot melt connection device for PVC pipes according to claim 3, characterized in that: The trigger assembly comprises a fixed plate (123) fixedly connected to the L-shaped base (1), an L-shaped contact plate (12) slidably passing through the fixed plate (123), the top of the L-shaped contact plate (12) contacts the bottom of the electric bracket (2), the bottom of the L-shaped contact plate (12) contacts the rear side of the swing frame (6), a guide rod (122) slidably passing through the fixed plate (123), and a connecting spring (121) sleeved on the guide rod (122) is connected between the end of the guide rod (122) and the L-shaped contact plate (12).

5. A hot melt connection device for PVC pipes according to claim 4, characterized in that: The positioning assembly comprises a fixed seat (13) fixedly connected to the bottom of the electric placement seat (4); an L-shaped positioning rod (131) is rotatably connected to the end of the fixed seat (13) for positioning the position of the PVC pipe; a rotating shaft (132) is rotatably connected to the fixed seat (13); the front end of the rotating shaft (132) is connected to the shaft of the L-shaped positioning rod (131) through a gear transmission; a spur gear (133) is fixedly sleeved on the rear end of the rotating shaft (132); and a fixed rack (134) meshing with the spur gear (133) is symmetrically fixedly connected to the outer side surface of the L-shaped base (1).

6. A hot melt connection device for PVC pipes according to claim 5, characterized in that: The hot-melt connection device for PVC pipes further comprises a dust collection component, which comprises a high-temperature resistant elastic cloth (141) fixedly connected to both sides of an electric bracket (2) and used to block smoke and dust generated by the hot-melt connection. The electric bracket (2) is rotatably connected with swing rods (14) at symmetrical and evenly spaced intervals along the circumferential direction. The tail end of the swing rod (14) is fixedly connected to the outer side of the high-temperature resistant elastic cloth (141) to drive the high-temperature resistant elastic cloth (141) to open and close. The electric bracket (2) is symmetrically fixedly connected with an annular exhaust pipe (142). The exhaust end of the annular exhaust pipe (142) is located in the high-temperature resistant elastic cloth (141). A connecting pipe (143) is connected between the annular exhaust pipes (142). The exhaust end of the connecting pipe (143) passes through the electric bracket (2). A pushing component is provided between the electric bracket (2) and the swing rod (14) to drive the swing rod (14) to swing.

7. A hot melt connection device for PVC pipes according to claim 6, characterized in that: The pushing assembly comprises a double-rod cylinder (144) symmetrically mounted on the electric bracket (2), a trigger frame (145) is fixedly connected between the ends of the telescopic rods on the left side and the ends of the telescopic rods on the right side of the double-rod cylinder (144), a waist-shaped hole (146) is opened on the swing rod (14), a connecting plate (147) is slidably connected inside the waist-shaped hole (146), and the connecting plate (147) is rotatably connected to the rear end of the trigger frame (145).

8. A hot melt connection device for PVC pipes according to claim 7, characterized in that: The hot-melt connection device for the PVC pipe also includes a rubber pad (15) fixed to the clamping block (5) for protecting the PVC pipe.

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