Automatic welding machine for PVC pipes

Abstract

The utility model provides a kind of automatic welding machine for PVC pipe belongs to mechanical technical field.It solves how to improve the problem of welding efficiency.The automatic welding machine for PVC pipe includes base, and the clamping mechanism one for clamping main pipe and the clamping mechanism two for clamping several branch pipes are slidably connected on base along horizontal direction, the clamping mechanism one and the clamping mechanism two are oppositely arranged, and the heating plate with several heating end heads on both sides is slidably arranged in base along vertical direction, and the heating plate is located between the clamping mechanism one and the clamping mechanism two, and horizontal drive mechanism and vertical drive mechanism are arranged on base, horizontal drive mechanism is respectively connected with the clamping mechanism one and the clamping mechanism two transmission, and the clamping mechanism one and the clamping mechanism two can be slid on base to approach or move away from each other, and vertical drive mechanism is connected with heating plate and can drive heating plate to slide up and down and position.The automatic welding machine for PVC pipe can improve welding efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to an automatic welding machine for PVC pipes. Background Technology

[0002] PVC pipes are now widely used pipes. Currently, the assembly methods for PVC pipes can be roughly divided into two types: socket connection and hot melt welding. Compared with socket connection, welding has higher reliability and sealing performance.

[0003] However, the welding and fixing method is relatively more complicated, especially for welding connections between a single main pipe and several branch pipes. For this type of pipe assembly structure, simply put, several connection holes are first made on the outer wall of the main pipe. Then, the operator prepares the corresponding number of branch pipes. During the welding operation, the operator needs to use a hot melt gun to heat and soften the inner wall of the connection hole and the end of the branch pipe in sequence. Then, the branch pipe is inserted into the connection hole. Under the premise of ensuring that the end of the branch pipe and the inner wall of the connection hole are tightly connected, it is left to stand for a period of time. After the heated part cools and hardens, the end of the branch pipe and the inner wall of the connection hole of the main pipe are tightly connected. Then, the branch pipes are assembled according to this operation method.

[0004] However, in actual operation, each heating and melting process and the subsequent cooling process require a certain amount of time. In addition, the number of branch pipes to be installed varies, ranging from one to three to more than ten. Apart from the time required for actual operation, the operator spends a lot of time waiting for the melting process to complete and for the cooling and hardening process, resulting in low efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an automatic welding machine for PVC pipes. The technical problem this invention aims to solve is: how to improve welding efficiency.

[0006] The objective of this utility model can be achieved through the following technical solution: An automatic welding machine for PVC pipes includes a base. A clamping mechanism one for clamping the main pipe and a clamping mechanism two for clamping several branch pipes are slidably connected on the base in the horizontal direction, and the clamping mechanism one and the clamping mechanism two are arranged opposite to each other. A heating plate with several heating ends on both sides is slidably mounted on the base in the vertical direction, and the heating plate is located between the clamping mechanism one and the clamping mechanism two. The base is provided with a horizontal driving mechanism and a vertical driving mechanism. The horizontal driving mechanism is respectively connected to the clamping mechanism one and the clamping mechanism two, and can make the clamping mechanism one and the clamping mechanism two slide closer or further away from each other on the base. The vertical driving mechanism is connected to the heating plate and can drive the heating plate to slide down and be positioned.

[0007] The working principle of this automatic welding machine is as follows: Before operation, the worker manually assembles the main pipe to be welded onto clamping mechanism one and several branch pipes to be welded onto clamping mechanism two. Thanks to the arrangement of clamping mechanisms one and two, the ends of several branch pipes are aligned with the holes on the side wall of the main pipe. Under these conditions, the worker first activates the vertical drive mechanism, causing the heating plate to slide upwards. The two sides of the heating plate are directly opposite clamping mechanisms one and two, respectively. In this state, the heating ends on one side of the heating plate are aligned with the holes on the main pipe, and the heating ends on the other side of the heating plate are aligned with the ends of several branch pipes. Then, the worker activates the horizontal drive mechanism, which simultaneously drives clamping mechanisms one and two to move inwards. This causes the heating ends on one side of the heating plate to extend into the corresponding holes and heat the circumferential inner wall of the holes. On the other side, several heating heads are fitted onto the corresponding branch pipe ports to heat the ports. After the heating and softening process is complete, the worker first activates the horizontal drive mechanism, which synchronously drives clamping mechanism one and clamping mechanism two to move outward, separating the heating heads from the holes and branch pipe ports. Then, the vertical drive mechanism is activated, causing the heating plate to move downward and reset, avoiding obstruction between clamping mechanism one and clamping mechanism two. Then, the horizontal drive mechanism is activated again, which synchronously drives clamping mechanism one and clamping mechanism two to move inward, ensuring that the ports of the branch pipes are inserted one-to-one into the holes on the side wall of the main pipe. With the branch pipe ports and the inner wall of the holes tightly fitted, the pipes are allowed to stand for a while and cool down before the welding operation of the main pipe and the branch pipes is completed. Compared with the existing technology, it is no longer necessary to manually weld each branch pipe onto the main pipe in sequence, effectively saving unnecessary time and thus improving the efficiency of the welding operation.

[0008] In the aforementioned automatic welding machine for PVC pipes, the clamping mechanism includes a main sliding plate slidably connected to the base, a long strip-shaped upper pressure plate, and a lower pressure plate. The main sliding plate is rectangular and arranged laterally along the base. The lower pressure plate is fixed to the main sliding plate and arranged along its length. The upper pressure plate is located directly above the lower pressure plate. Specifically, the clamping mechanism uses the main sliding plate slidably connected to the base as the main carrier, and achieves clamping and positioning of the main pipe through the cooperation of the upper and lower pressure plates. It should be further noted that, to ensure clamping stability, the opposite sides of the upper and lower pressure plates are arc-shaped, thereby ensuring a tight fit between the upper and lower pressure plates and the outer wall of the main pipe.

[0009] In the aforementioned automatic welding machine for PVC pipes, a positioning plate and a positioning rod are fixed on the main slide plate. The positioning plate is located on the side of the main upper pressure plate opposite to the clamping mechanism. The positioning rod is located between the positioning plate and the main lower pressure plate. A pressure block is rotatably sleeved on the positioning rod, and the pressure block presses against the upper end of the positioning plate and the upper side of the main upper pressure plate. After the main upper pressure plate is pressed onto the main pipe, the pressure block is rotated so that it presses against the upper end of the positioning plate and the upper side of the main upper pressure plate, thereby achieving the positioning of the main upper pressure plate and ensuring the clamping stability of the clamping mechanism on the main pipe. As a further specific solution, the positioning plate and positioning rod can be arranged in multiple pieces, spaced apart along the length of the main slide plate, and a pressure block is provided on each positioning rod, thereby achieving the same pressing effect on all areas of the main upper pressure plate.

[0010] In the aforementioned automatic welding machine for PVC pipes, a locking plate is detachably connected to one side wall of the main slide plate and the clamping mechanism. The locking plate has a positioning protrusion on its surface, which extends between the main upper pressure plate and the main lower pressure plate. Based on the aforementioned solution, the added locking plate allows the positioning protrusion to extend into one of the holes in the main pipe, thereby achieving positioning of the main pipe along the length of the main slide plate and preventing slight slippage of the main pipe that could cause deviations in the position of the hole and the branch pipe end.

[0011] In the aforementioned automatic welding machine for PVC pipes, a positioning seat is fixed on the main slide plate. The positioning seat is located near one end of the main upper pressure plate and the main lower pressure plate. A positioning screw is screwed onto the positioning seat. The positioning screw is arranged along the length direction of the main slide plate, and a positioning boss is fixed at the inner end of the positioning screw near the ends of the main upper pressure plate and the main lower pressure plate. The presence of the positioning boss provides abutment support to one end of the main pipe, thereby further ensuring the positioning stability of the main pipe. Furthermore, the screwed engagement between the positioning screw and the positioning seat allows the positioning boss to slide along the length direction of the main slide plate, ensuring its compatibility with main pipes of different lengths.

[0012] In the aforementioned automatic welding machine for PVC pipes, the clamping mechanism two includes a front slide plate and a rear slide plate slidably connected to the base. Both the front slide plate and the rear slide plate are rectangular plates arranged laterally along the base. The front slide plate and the rear slide plate are arranged longitudinally at intervals along the base and are connected and fixed by a connecting rod. The front slide plate is provided with a long strip-shaped upper pressure plate and a lower pressure plate. The lower pressure plate is fixed to the front slide plate and arranged along the length direction of the front slide plate. The upper pressure plate is located directly above the lower pressure plate and is detachably connected to the lower pressure plate by screws. A support plate is fixed to the rear slide plate and is arranged along the length direction of the rear slide plate. The second clamping mechanism uses a front and rear sliding plate slidably connected to the base as a carrier. A lower pressure plate fixed to the front sliding plate and a support plate fixed to the rear sliding plate respectively lift the front and rear ends of each branch pipe. The front and rear sliding plates are then connected and fixed via a connecting rod, enabling synchronous movement. Furthermore, an upper pressure plate is screwed onto the lower pressure plate to press the front end (the end to be welded) of each branch pipe, ensuring its positioning. Notably, to ensure stable assembly of each branch pipe, arc-shaped grooves are provided on the opposite sides of the upper and lower pressure plates and on the upper side of the support plate. These grooves are spaced along the length of the upper and lower pressure plates and the support plate, ensuring a tight fit with the outer wall of each branch pipe and guaranteeing stable assembly.

[0013] In the aforementioned automatic welding machine for PVC pipes, a long, narrow baffle is also provided on the rear slide plate. The baffle is fixed to the rear slide plate and arranged along its length, with the baffle located on the side of the support plate opposite to the front slide plate. Based on this design, by assembling the baffle on the rear slide plate, the rear ends of each branch pipe can abut against the outer wall of the baffle. When the first and second driving clamping mechanisms move to connect the main pipe and branch pipes, each branch pipe can rely on the baffle for support, preventing it from shifting backward during insertion and causing substandard welding.

[0014] In the aforementioned automatic welding machine for PVC pipes, the horizontal drive mechanism includes a motor fixed to the main slide plate, a drive rod arranged along the length of the main slide plate and transmitted to the motor via gears, and a rack fixed longitudinally to the base. The drive rod and the rack are connected via gear transmission. When the motor starts, it can transmit power to the drive rod via gears, and then, by utilizing the engagement between the gears and rack at both ends of the drive rod, the main slide plate can be driven forward or backward along the longitudinal direction of the base.

[0015] In the aforementioned automatic welding machine for PVC pipes, the horizontal drive mechanism further includes two rotating bearing seats fixed to the base, with the two rotating bearing seats positioned close to both ends of the rack. A transmission belt located outside the rack is tensioned between the two rotating bearing seats. An upper adapter plate is fixed to the upper surface of the transmission belt, and a lower adapter plate is fixed to the lower surface of the transmission belt. The upper adapter plate and the main slide plate are screwed together, and the lower adapter plate and the secondary slide plate are screwed together. As a further embodiment, during the sliding of the main slide plate, the upper adapter plate can be used as a power transmission medium to drive the transmission belt to rotate between the two rotating bearing seats. Since the upper adapter plate is installed on the upper surface of the transmission belt, the lower adapter plate, fixed to the lower surface of the transmission belt, moves in the opposite direction to the upper adapter plate. Therefore, the secondary slide plate, fixed to the lower adapter plate, can be driven to move closer to the main slide plate, achieving the purpose of synchronously driving the clamping mechanism one and the clamping mechanism two by the horizontal drive mechanism.

[0016] In the aforementioned automatic welding machine for PVC pipes, the base has a horizontally extending opening. The vertical drive mechanism includes a mounting seat fixed inside the base and a cylinder fixed on the mounting seat with its drive end facing upwards. A support plate is provided on the mounting seat. The heating plate is located within the extending opening and is fixed to the support plate by screws. One side of the support plate is slidably connected to the mounting seat, and the other side is fixed with a connecting seat. The drive end of the cylinder and the connecting seat are hinged together by a connecting shaft. The extending opening on the base accommodates the heating plate. When the drive end of the cylinder extends upwards, the support plate moves along the mounting seat, causing the heating plate to rise and ultimately be positioned between the main slide plate and the secondary front slide plate. This ensures that the heating ends on both sides of the heating plate are aligned with the holes in the main pipe and the ports of the branch pipes. When the drive end of the cylinder retracts downwards, the support plate moves along the mounting seat, causing the heating plate to fall back into position, preventing obstruction of the connection between the main pipe and the branch pipes.

[0017] Compared with existing technologies, this automatic welding machine for PVC pipes has the following advantages: clamping mechanism one and clamping mechanism two are used to clamp and position the main pipe and branch pipe to be welded, respectively. Then, through the cooperation of horizontal drive mechanism and vertical drive mechanism, the heating ends on both sides of the heating plate heat and soften the holes of the main pipe and the ends of the branch pipe. After the heating plate is reset, the clamping mechanism one and clamping mechanism two can be controlled by the horizontal drive mechanism to connect the main pipe and the branch pipe, which effectively improves the welding efficiency of PVC pipes. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of an automatic welding machine for PVC pipes.

[0019] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0020] Figure 3 yes Figure 1 A magnified view of a section at point B in the middle.

[0021] Figure 4 This is a structural schematic diagram of an automatic welding machine for PVC pipes from another perspective.

[0022] Figure 5 yes Figure 4 A magnified view of a section at point C.

[0023] Figure 6 This is a structural diagram of the automatic welding machine for PVC pipes after the circumferential frame of the base has been removed.

[0024] Figure 7 This is a schematic diagram of the clamping mechanism.

[0025] Figure 8 This is a schematic diagram of the second clamping mechanism.

[0026] Figure 9 This is a schematic diagram of the horizontal drive mechanism.

[0027] Figure 10 This is a schematic diagram of the vertical drive mechanism.

[0028] In the picture,

[0029] 1. Base; 11. Heating plate; 111. Heating end; 12. Protrusion;

[0030] 2. Clamping Mechanism 1; 21. Main Slide Plate; 211. Positioning Plate; 212. Main Upper Pressure Plate; 2121. Pressure Block; 213. Locking Plate; 2131. Positioning Protrusion; 214. Positioning Seat; 2141. Positioning Screw; 21411. Positioning Boss; 22. Main Upper Pressure Plate; 23. Main Lower Pressure Plate;

[0031] 3. Clamping mechanism two; 31. First slide plate; 311. Second upper pressure plate; 312. Second lower pressure plate; 32. Second slide plate; 321. Support plate; 322. Baffle; 33. Connecting rod;

[0032] 4. Horizontal drive mechanism; 41. Motor; 42. Drive rod; 43. Rack; 44. Rotating bearing housing; 441. Transmission belt; 4411. Upper adapter plate; 4412. Lower adapter plate;

[0033] 5. Vertical drive mechanism; 51. Mounting base; 511. Bracket plate; 5111. Connecting base; 52. Cylinder. Detailed Implementation

[0034] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0035] like Figure 1 and Figure 4 As shown, the automatic welding machine for PVC pipes includes a base 1, which is specifically rectangular in shape and has an internal cavity. A clamping mechanism 1 2 and a clamping mechanism 2 3 are respectively provided on the top of the base 1, and the two are arranged opposite each other in the horizontal direction.

[0036] Combination Figure 7 The clamping mechanism 2 specifically includes a rectangular main slide plate 21, a long strip-shaped upper main pressure plate 22, and a long strip-shaped lower main pressure plate 23. The main slide plate 21 and the top of the base 1 are slidably connected via a slide rail structure. The lower main pressure plate 23 is fixed horizontally to the upper side of the main slide plate 21, specifically arranged along the length of the main slide plate 21 and located on the edge of the main slide plate 21 near the clamping mechanism 3. The upper main pressure plate 22 is arranged side-by-side directly above the lower main pressure plate 23. Figure 2 A number of rectangular positioning plates 211 arranged vertically are fixed on the upper side of the main slide plate 21. The positioning plates 211 are spaced apart along the length of the main slide plate 21. Specifically, the positioning plates 211 are located on the side of the main lower pressure plate 23 opposite to the clamping mechanism 23. Next, a number of vertically arranged positioning rods 212 are fixed on the upper side of the main slide plate 21. The positioning rods 212 are all located between the main lower pressure plate 23 and the positioning plates 211 and are spaced apart along the length of the main slide plate 21. A rectangular plate-shaped pressure block 2121 is rotatably sleeved on each positioning rod 212. Specifically, nuts are set on each positioning rod 212 and on the upper and lower sides of the pressure block 2121 to limit the pressure block 2121 in the vertical direction. One end of each pressure block 2121 presses against the upper end of the corresponding positioning plate 211, and the other end presses against the upper side of the main upper pressure plate 22.

[0037] like Figure 2 As shown, a vertically arranged locking plate 213 is fixed on the side wall of the main slide plate 21 facing the clamping mechanism 23. The locking plate 213 is a strip plate with its upper end protruding from the upper side of the main slide plate 21. The upper end of the locking plate 213 has a positioning protrusion 2131 that extends between the main upper pressure plate 22 and the main lower pressure plate 23. Next, a positioning seat 214 is also fixed on the upper side of the main slide plate 21. The positioning seat 214 is specifically located at one end of the main lower pressure plate 23. A positioning screw 2141 arranged along the length direction of the main slide plate 21 is screwed onto the positioning seat 214. The end of the positioning screw 2141 facing the main lower pressure plate 23 has a positioning boss 21411.

[0038] Combination Figure 8The clamping mechanism 3 includes a rectangular front slide plate 31 and a rear slide plate 32, both of which are arranged along the width direction of the base 1 and are slidably connected to the top of the base 1 through a slide rail structure. The front slide plate 31 and the rear slide plate 32 are arranged at intervals along the longitudinal direction of the base 1, and two parallel connecting plates are arranged between them. Both connecting plates are arranged along the longitudinal direction of the base 1. One end of each connecting plate is screwed to the front slide plate 31, and the other end is screwed to the rear slide plate 32.

[0039] On the upper side of the preceding slide plate 31, there are a secondary upper pressure plate 311 and a secondary lower pressure plate 312, both arranged along the length of the preceding slide plate 31. The secondary lower pressure plate 312 is fixed to the upper side of the preceding slide plate 31, and the secondary upper pressure plate 311 is fixed to the secondary lower pressure plate 312 by screws. On the upper side of the following slide plate 32, there are a long strip-shaped support plate 321 and a baffle 322, both fixed along the length of the following slide plate 32. The support plate 321 and the baffle 322 are arranged side by side, with the support plate 321 being closer to the preceding slide plate 31 than the baffle 322. As an alternative, the clamping mechanism 1 2 and the clamping mechanism 2 3 can be replaced by a robotic arm.

[0040] Combination Figure 3 , Figure 5 as well as Figure 9 The horizontal drive mechanism 4 includes a motor 41 fixed laterally on the main slide plate 21, a drive rod 42 rotatably connected to the motor 41 via a connecting seat 5111, and racks 43 fixed along the length of the base 1 on both sides of the top. The motor 41 and the drive rod 42 are both arranged along the length of the main slide plate 21. Gears are fixed in the middle and at both ends of the drive rod 42. The gear in the middle of the drive rod 42 meshes with the gear on the motor shaft of the motor 41, and the gears at both ends of the drive rod 42 mesh with the two racks 43 respectively.

[0041] In addition, two rotating bearing seats 44 are fixed on both sides of the top of the base 1. The two rotating bearing seats 44 on the same side are arranged longitudinally along the base 1. A transmission belt 441 located outside the rack 43 is tensioned between the two rotating bearing seats on the same side. An upper adapter plate 4411 is fixed to the upper belt surface of the transmission belt 441 by screws, and a lower adapter plate 4412 is fixed to the lower belt surface by screws. The upper adapter plate 4411 and the main slide plate 21 are locked together by screws, and the lower adapter plate 4412 and the previous slide plate 31 are locked together by screws.

[0042] Combination Figure 6 and Figure 10An opening 12 is provided at the top of the base 1. The opening 12 is strip-shaped along the width direction of the base 1. A strip-shaped heating plate 11 is provided vertically inside the opening 12. Several heating ends 111 are provided on both sides of the heating plate 11. Several heating ends 111 located on the same side are spaced apart along the length direction of the heating plate 11.

[0043] The vertical drive mechanism 5 includes a mounting base 51 fixed on the inner bottom wall of the base 1, a long strip-shaped support plate 511, and a cylinder 52 with the drive end facing upward. One side of the support plate 511 and the mounting base 51 are slidably connected by a slide rail structure, and a connecting seat 5111 is fixed on the other side by screws. The heating plate 11 is fixed on the support plate 511 by screws. The cylinder 52 is fixed on the mounting base 51 and the drive end is hinged to the connecting seat 5111 through a connecting shaft.

[0044] Working Principle: This automatic welding machine mainly involves two steps for welding pipe fittings: heating and softening the parts to be welded on the main pipe and each branch pipe, and connecting the main pipe and each branch pipe. Before operation, the worker needs to place the main pipe between the upper main pressure plate 22 and the lower main pressure plate 23. The upper main pressure plate 22 and the lower main pressure plate 23 work together to clamp and position the main pipe. It is worth mentioning that the positioning of the main pipe can also be achieved by inserting the positioning protrusion 2131 on the positioning plate 211 into the pre-drilled hole on the side wall of the main pipe. The fixed connection between the positioning plate 211 and the main slide plate 21 positions the main pipe along the length of the main slide plate 21. The presence of the positioning protrusion 21411 also provides a certain positioning reference for the assembly of the main pipe. Then, the front end of each branch pipe is clamped and positioned by the secondary upper pressure plate 311 and the secondary lower pressure plate 312. While the support plate 321 lifts each branch pipe, the baffle plate 322 supports the rear end of each branch pipe. In this state, the assembly of the main pipe and each branch pipe is completed.

[0045] During the heating and softening operation, cylinder 52 is first activated, causing the support plate 511 to extend the heating plate 11 from the outlet 12. This ensures that both sides of the heating plate 11 are aligned with the main pipe and each branch pipe. Notably, in this state, several heating ends 111 on one side of the heating plate 11 are aligned with several holes on the side wall of the main pipe, and several heating ends 111 on the other side are aligned with the ports of several branch pipes. At this time, motor 41 starts, transmitting power through drive rod 42 to two racks 43, utilizing the teeth... The main slide plate 21 slides on the base 1 in coordination with the drive plate 21. At the same time, the main slide plate 21 is driven to the transmission belt 441 via the upper adapter plate 4411. The transmission belt 441 and the lower adapter plate 4412 work together to drive the secondary slide plate 31. With the presence of the connecting rod 33, the secondary front slide plate and the secondary rear slide plate slide towards the heating plate 11. This causes several heating ends 111 on one side of the heating plate 11 to be inserted into the corresponding holes on the side wall of the main pipe, and several heating ends 111 on the other side to be inserted into the corresponding branch pipe ports, thereby realizing the heating and softening operation.

[0046] After the above heating operation is completed, the motor 41 is first started in reverse, so that the main slide plate 21 and the previous slide plate 31 slide in opposite directions to ensure that the main pipe and each branch pipe are separated from the heating end 111 on the heating plate 11. Then, the cylinder 52 is started to move its driving end down, and the support plate 511 drives the heating plate 11 to retract into the protrusion 12 to avoid obstruction between the main pipe and several branch pipes. Then, the motor 41 is started in the forward direction again, so that the main pipe and branch pipes move closer to each other, so that the ends of several branch pipes are inserted into the holes opened on the side wall of the main pipe one by one. After a certain period of time, the joints cool and harden, and the welding work of the main pipe and each branch pipe is completed.

[0047] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0048] Although this paper extensively uses base 1, heating plate 11, heating end 111, extension 12, clamping mechanism one 2, main slide plate 21, positioning plate 211, main upper pressure plate 212, pressure block 2121, locking plate 213, positioning protrusion 2131, positioning seat 214, positioning screw 2141, positioning boss 21411, main upper pressure plate 22, main lower pressure plate 23, clamping mechanism two 3, front slide plate 31, and secondary upper pressure plate 31 The terminology used includes: 1. Secondary pressure plate 312, rear secondary slide plate 32, support plate 321, baffle 322, connecting rod 33, horizontal drive mechanism 4, motor 41, drive rod 42, rack 43, rotating bearing seat 44, transmission belt 441, upper adapter plate 4411, lower adapter plate 4412, vertical drive mechanism 5, mounting base 51, bracket plate 511, connecting base 5111, cylinder 52, etc., but the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An automatic welding machine for PVC pipes, comprising a base (1), characterized in that, The base (1) is slidably connected in the horizontal direction to a clamping mechanism 1 (2) for clamping the main pipe and a clamping mechanism 2 (3) for clamping several branch pipes, and the clamping mechanism 1 (2) and the clamping mechanism 2 (3) are arranged opposite to each other. The base (1) has a heating plate (11) with several heating ends (111) on both sides sliding in the vertical direction, and the heating plate (11) is located between the clamping mechanism 1 (2) and the clamping mechanism 2 (3). The base (1) is provided with a horizontal driving mechanism (4) and a vertical driving mechanism (5). The horizontal driving mechanism (4) is connected to the clamping mechanism 1 (2) and the clamping mechanism 2 (3) respectively, and can make the clamping mechanism 1 (2) and the clamping mechanism 2 (3) slide closer or further away from each other on the base (1). The vertical driving mechanism (5) is connected to the heating plate (11) and can drive the heating plate (11) to slide up and down and be positioned.

2. The automatic welding machine for PVC pipes according to claim 1, characterized in that, The clamping mechanism 1 (2) includes a main slide plate (21) slidably connected to the base (1), a main upper pressure plate and a main lower pressure plate in the shape of a long strip. The main slide plate (21) is a rectangular plate and is arranged laterally along the base (1). The main lower pressure plate is fixed on the main slide plate (21) and is arranged along the length direction of the main slide plate (21). The main upper pressure plate is located directly above the main lower pressure plate.

3. The automatic welding machine for PVC pipes according to claim 2, characterized in that, A positioning plate (211) and a positioning rod (212) are fixed on the main slide plate (21). The positioning plate (211) is located on the side of the main upper pressure plate opposite to the clamping mechanism (3). The positioning rod (212) is located between the positioning plate (211) and the main lower pressure plate. A pressure block (2121) is rotatably sleeved on the positioning rod (212). The pressure block (2121) presses against the upper end of the positioning plate (211) and the upper side of the main upper pressure plate.

4. The automatic welding machine for PVC pipes according to claim 2 or 3, characterized in that, A locking plate (213) is detachably connected to the side wall opposite to the main sliding plate (21) and the clamping mechanism (3). The locking plate (213) has a positioning protrusion (2131) on its surface, and the positioning protrusion (2131) extends between the main upper pressure plate and the main lower pressure plate.

5. The automatic welding machine for PVC pipes according to claim 4, characterized in that, A positioning seat (214) is fixed on the main slide plate (21). The positioning seat (214) is located near one end of the main upper pressure plate and the main lower pressure plate. A positioning screw (2141) is screwed onto the positioning seat (214). The positioning screw (2141) is arranged along the length of the main slide plate (21), and a positioning boss (21411) is fixed at the inner end of the positioning screw (2141) near the end of the main upper pressure plate and the main lower pressure plate.

6. The automatic welding machine for PVC pipes according to claim 2 or 3, characterized in that, The clamping mechanism 2 (3) includes a front sliding plate (31) and a rear sliding plate (32) slidably connected to the base (1). Both the front sliding plate (31) and the rear sliding plate (32) are rectangular plates arranged laterally along the base (1). The front sliding plate (31) and the rear sliding plate (32) are arranged longitudinally along the base (1) and connected and fixed by a connecting rod (33). The front sliding plate (31) is provided with a long strip-shaped upper pressure plate (311) and a lower pressure plate. The plate (312) is fixed on the front slide plate (31) and arranged along the length direction of the front slide plate (31). The upper plate (311) is located directly above the lower plate (312) and is detachably connected to the lower plate (312) by screws. The rear slide plate (32) is fixed with a support plate (321). The support plate (321) is fixed on the rear slide plate (32) and arranged along the length direction of the rear slide plate (32).

7. The automatic welding machine for PVC pipes according to claim 6, characterized in that, The rear slide plate (32) is also provided with a long strip-shaped baffle (322). The baffle (322) is fixed on the rear slide plate (32) and arranged along the length direction of the rear slide plate (32). The baffle (322) is located on the side of the support plate (321) that is away from the front slide plate (31).

8. The automatic welding machine for PVC pipes according to claim 7, characterized in that, The horizontal drive mechanism (4) includes a motor (41) fixed on the main slide plate (21), a drive rod (42) arranged along the length of the main slide plate (21) and driven by the motor (41) via gears, and a rack (43) fixed longitudinally on the base (1) along the base (1). The drive rod (42) and the rack (43) are connected by gears.

9. The automatic welding machine for PVC pipes according to claim 8, characterized in that, The horizontal drive mechanism (4) further includes two rotating bearing seats (44) fixed on the base (1), and the two rotating bearing seats (44) are arranged close to both ends of the rack (43). A transmission belt (441) located outside the rack (43) is tensioned between the two rotating bearing seats (44). An upper adapter plate (4411) is fixed on the upper belt surface of the transmission belt (441), and a lower adapter plate (4412) is fixed on the lower belt surface of the transmission belt (441). The upper adapter plate (4411) and the main slide plate (21) are screwed together by screws, and the lower adapter plate (4412) and the previous slide plate (31) are screwed together by screws.

10. The automatic welding machine for PVC pipes according to claim 9, characterized in that, The base (1) has a protrusion (12) on its horizontal side. The vertical drive mechanism (5) includes a mounting seat (51) fixed in the base (1) and a cylinder (52) fixed on the mounting seat (51) with its drive end facing upward. The mounting seat (51) is provided with a bracket plate (511). The heating plate (11) is located in the protrusion (12) and is fixed to the bracket plate (511) by screws. One side of the bracket plate (511) is slidably connected to the mounting seat (51), and the other side is fixed with a connecting seat (5111). The drive end of the cylinder (52) and the connecting seat (5111) are hinged together by a connecting shaft.

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