阅读说明：本技术 一种ppr水管热熔连接处理工艺 (PPR water pipe hot melting connection treatment process ) 是由 黄伟 付子豪 于 2020-05-06 设计创作，主要内容包括：本发明涉及一种PPR水管热熔连接处理工艺,该PPR水管热熔连接处理工艺采用如下热熔连接机械,该热熔连接机械包括底板和设置在底板顶部的固定装置,固定装置上固定有PPR水管,底板的顶部中间设置有熔接装置。本发明利用气缸和定滑轮相配合,使气缸驱动两组转盘同步靠近或者分离,管件固定在转盘内,可以同时移动相同的距离,利用一个转轴带动两个不完全齿轮转动,使两组转盘同时转动相同的角度,管件在对准插接时不会出现歪斜的情况,相比人工操作误差更小；本发明利用弧形板对管件连接处进行保压固定,加快管件的冷却定型,且管件不会存在晃动或者移动的情况,通过设置多工位,可以同时对两组管件分别进行热熔和保压固定。(The invention relates to a PPR water pipe hot-melt connection treatment process, which adopts a hot-melt connection machine, wherein the hot-melt connection machine comprises a bottom plate and a fixing device arranged at the top of the bottom plate, a PPR water pipe is fixed on the fixing device, and a welding device is arranged in the middle of the top of the bottom plate. The air cylinder is matched with the fixed pulley, so that the air cylinder drives the two groups of turntables to synchronously approach or separate, the pipe fittings are fixed in the turntables and can simultaneously move for the same distance, the two incomplete gears are driven to rotate by the rotating shaft, the two groups of turntables simultaneously rotate for the same angle, the pipe fittings cannot be skewed when aligned and spliced, and the error is smaller compared with the error caused by manual operation; according to the invention, the arc-shaped plates are used for pressure maintaining and fixing the joints of the pipe fittings, so that the cooling and shaping of the pipe fittings are accelerated, the pipe fittings do not shake or move, and through setting multiple stations, hot melting and pressure maintaining and fixing can be simultaneously carried out on two groups of pipe fittings.)

1. The utility model provides a PPR water pipe hot melt connection processing technology, this PPR water pipe hot melt connection processing technology adopts following hot melt connection machinery, and this hot melt connection machinery includes bottom plate (10) and sets up fixing device (20) at bottom plate (10) top, is fixed with PPR water pipe (30) on fixing device (20), is provided with welding set (40), its characterized in that in the middle of the top of bottom plate (10): the top center of the bottom plate (10) is fixedly provided with a fixed plate (11), two sides of the fixed plate (11) are respectively provided with a first movable plate (12) and a second movable plate (13) in a sliding manner, the fixed plate (11) is fixedly connected with the first movable plate (12) through an air cylinder (14), the fixed plate (11) is fixedly connected with the second movable plate (13) through a connecting spring (15), one ends, close to the second movable plate (13), of the top of the bottom plate (10) are symmetrically provided with fixed pulleys (16), the outer wall of the first movable plate (12) is fixedly connected with pull ropes (17), and the tail ends of the pull ropes (17) are connected with the outer wall of the second movable plate (13) after being changed to the rear direction through the fixed pulleys (16;

the fixing device (20) comprises a fixing frame (21) fixed on the first moving plate (12) and the second moving plate (13) and a rotating disc (22) arranged on the inner side of the fixing frame (21), and the fixing frame (21) is rotatably connected with the rotating disc (22) through a connecting shaft (23); the outer side wall of one group of the fixing frames (21) is fixedly provided with a motor (24), the output end of the motor (24) is fixedly connected with a rotating shaft (25), the tail end of the rotating shaft (25) extends to the outer side of the other group of the fixing frames (21), the tail end of the connecting shaft (23) is coaxially connected with a driven gear (27), an incomplete gear (26) meshed with the driven gear (27) is fixedly sleeved on the rotating shaft (25), and the incomplete gear (26) rotates for one circle to drive the driven gear (27) to rotate for 90 degrees; four groups of positioning holes (223) which are uniformly and annularly distributed are formed in the side wall of the turntable (22), the PPR water pipe (30) is horizontally arranged in the positioning holes (223), and a locking screw (224) used for locking the PPR water pipe (30) is screwed in the positioning holes (223);

the welding device (40) comprises a fixing ring (41) fixed on the fixing plate (11), pressure maintaining mechanisms (43) are symmetrically arranged at the upper end and the lower end of the inner wall of the fixing ring (41), a hot melting device (42) is arranged between two groups of pressure maintaining mechanisms (43) on the inner wall of the fixing ring (41), and an included angle between the hot melting device (42) and the pressure maintaining mechanisms (43) is a right angle; the pressure maintaining mechanism (43) comprises two groups of vertical supports (431) which are symmetrically arranged and two groups of arc plates (432) which are rotatably arranged between the vertical supports (431), and the arc plates (432) are hinged through hinge shafts which are erected between the vertical supports (431); hinged plates (433) which are crossed with each other are arranged between the two groups of vertical supports (431) and below the arc-shaped plate (432), and the two groups of hinged plates (433) are hinged through a lifting rod (434) erected between the two groups of vertical supports (431);

the bottom end of the hinged plate (433) is provided with a guide rod (4331) parallel to the lifting rod (434), two sides of the vertical support (431) are symmetrically provided with a clip-shaped frame (4312), the tail end of the guide rod (4331) extends into the clip-shaped frame (4312) and is in sliding connection with the clip-shaped frame (4312), and the top end of the hinged plate (433) is hinged with the outer annular surface of the arc-shaped plate (432); the pressure maintaining mechanism (43) further comprises an electric push rod (435) fixedly arranged on the inner wall of the fixing ring (41), and the tail end of the electric push rod (435) is fixedly connected with the lifting rod (434);

the PPR water pipe hot-melt connection treatment process comprises the following steps:

and (5) fixing an S1 water pipe: inserting the marked PPR water pipe (30) into the positioning hole (223), keeping the tail end of the PPR water pipe (30) aligned, and locking and fixing the PPR water pipe (30) by rotating the locking screw rod (224);

s2 heating the pipe orifice: the driving cylinder (14) is shortened to drive the first moving plate (12) and the second moving plate (13) to synchronously approach, and the outer surface of the PPR water pipe (30) and the inner surface of the PPR water pipe (30) are simultaneously inserted into a die head of the hot melting device (42) to be heated for several seconds;

s3 tube drawing transposition: the driving cylinder (14) extends to drive the first moving plate (12) and the second moving plate (13) to be away from each other synchronously, the PPR water pipe (30) is pulled out from the die head simultaneously, the incomplete gear (26) is driven to rotate through the motor (24), the rotary disc (22) rotates for 90 degrees under the meshing transmission of the incomplete gear (26) and the driven gear (27), and the PPR water pipe (30) rotates to a pressure maintaining position along with the rotation;

s4 alignment plug: the driving cylinder (14) is shortened to drive the first moving plate (12) and the second moving plate (13) to synchronously approach, and the end parts of the two groups of PPR water pipes (30) are mutually sleeved;

s5 pressure maintaining and fixing: the electric push rod (435) is driven to extend to drive the two groups of hinged plates (433) to approach each other, the arc-shaped plates (432) are held close to each other by the jacking force of the hinged plates (433), and the joint of the PPR water pipes (30) is fixed under pressure maintaining until the two groups of PPR water pipes (30) are completely cooled;

s6 pipe dismantling: the electric push rod (435) is driven to shorten, the arc-shaped plate (432) is opened, the locking screw (224) is unscrewed, and the connected PPR water pipe (30) is pulled out from the positioning hole (223).

2. The hot-melt connection treatment process for the PPR water pipe according to claim 1, wherein the hot-melt connection treatment process comprises the following steps: the top of bottom plate (10) is provided with two slide rails (18) that extend along its length direction, and the one end of slide rail (18) extends to the outer edge of bottom plate (10), and the other end extends to the outer edge of fixed plate (11), and the corresponding logical groove has been seted up to the position that the bottom of second movable plate (13) corresponds slide rail (18), and slide rail (18) run through logical groove.

3. The hot-melt connection treatment process for the PPR water pipe according to claim 1, wherein the hot-melt connection treatment process comprises the following steps: a center hole (221) is formed in the center of the rotary disc (22), a through hole (211) is formed in the side wall of the fixing frame (21), one end of the connecting shaft (23) is fixedly arranged in the center hole (221), and the other end of the connecting shaft (23) is rotatably connected with the through hole (211) through a bearing.

4. The PPR water pipe hot-melt connection treatment process as claimed in claim 3, wherein: centre bore (221) are seted up at the rectangle through-hole of round hole periphery by round hole and multiunit and are constituteed, and the rectangle through-hole is even annular distribution in the round hole periphery, and the outer wall integrated into one piece of connecting axle (23) has the rectangle arch with rectangle through-hole matched with.

5. The hot-melt connection treatment process for the PPR water pipe according to claim 1, wherein the hot-melt connection treatment process comprises the following steps: the side wall of the rotating disc (22) is provided with a shaft hole (222) corresponding to the position of the rotating shaft (25), the shaft hole (222) extends to the side wall of the fixing frame (21), and the rotating shaft (25) penetrates through the shaft hole (222).

6. The hot-melt connection treatment process for the PPR water pipe according to claim 1, wherein the hot-melt connection treatment process comprises the following steps: one end of the locking screw rod (224) is rotatably connected with an extrusion plate (225) through a bearing, the extrusion plate (225) is in close contact with the outer wall of the PPR water pipe (30), the other end of the extrusion plate is fixedly connected with a handle (226), and a certain gap is kept between the tail end of the PPR water pipe (30) and the inner side wall of the fixing frame (21).

7. The hot-melt connection treatment process for the PPR water pipe according to claim 1, wherein the hot-melt connection treatment process comprises the following steps: the position of the inner side wall of the vertical support (431) corresponding to the lifting rod (434) is provided with a waist-shaped groove (4311) extending along the length direction of the lifting rod, and the tail end of the lifting rod (434) extends into the waist-shaped groove (4311).

8. The hot-melt connection treatment process for the PPR water pipe according to claim 1, wherein the hot-melt connection treatment process comprises the following steps: the connecting springs (15) are arranged in multiple groups and are uniformly and linearly distributed along the length direction of the second moving plate (13).

Technical Field

The invention relates to the technical field of hot-melt connection of PPR water pipes, in particular to a hot-melt connection treatment process of a PPR water pipe.

Background

The PPR pipe is a renewal product of a UPVC water supply pipe, an aluminum plastic pipe, a PE-X pipe and a PE-RT pipe, and because the PPR pipe uses a random copolymerization technology, the strength and the high temperature resistance of polypropylene are well ensured, so the PPR pipe becomes a main force of water pipe materials. PPR water pipe adopts the mode of hot melt to connect, connects the flow as follows: checking → cutting pipe → cleaning joint part and marking → heating → removing welding device → aligning → fitting pipe into pipe and correcting → maintaining pressure and cooling.

When the PPR water pipe is connected in a construction site, the pipe is generally pulled out from a die head of a hot melting device manually and then aligned and spliced, and the manual operation has uncertainty and the sleeving process is easy to be skewed; secondly, in the cooling process, the pipe or the pipe fitting cannot be moved, and the connection operation of the next joint can be carried out only after the pipe or the pipe fitting needs to be completely cooled, so that the connection efficiency of the pipe fitting is reduced.

Therefore, the invention provides a PPR water pipe hot-melt connection treatment process.

Disclosure of Invention

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose: a PPR water pipe hot-melt connection processing technology adopts a hot-melt connection machine, the hot-melt connection machine comprises a bottom plate and a fixing device arranged on the top of the bottom plate, a PPR water pipe is fixed on the fixing device, a welding device is arranged in the middle of the top of the bottom plate, a fixed plate is fixedly arranged at the center of the top of the bottom plate, a first movable plate and a second movable plate are respectively arranged on two sides of the fixed plate in a sliding mode, the fixed plate is fixedly connected with the first movable plate through a cylinder, the fixed plate is fixedly connected with the second movable plate through a connecting spring, fixed pulleys are symmetrically arranged at one end, close to the second movable plate, of the top of the bottom plate, pull ropes are fixedly connected to the outer wall of the first movable plate, and the tail ends of the pull ropes are connected with the outer;

the fixing device comprises a fixing frame fixed on the first moving plate and the second moving plate and a rotary table arranged on the inner side of the fixing frame, and the fixing frame is rotationally connected with the rotary table through a connecting shaft; the outer side walls of the fixing frames are fixedly provided with motors, the output ends of the motors are fixedly connected with rotating shafts, the tail ends of the rotating shafts extend to the outer sides of the fixing frames, the tail ends of the connecting shafts are coaxially connected with driven gears, incomplete gears meshed with the driven gears are fixedly sleeved on the rotating shafts, and the incomplete gears rotate for one circle to drive the driven gears to rotate for 90 degrees; four groups of positioning holes which are uniformly and annularly distributed are formed in the side wall of the turntable, the PPR water pipe is horizontally arranged in the positioning holes, and a locking screw rod used for locking the PPR water pipe is screwed in the positioning holes;

the fusion welding device comprises a fixing ring fixed on the fixing plate, pressure maintaining mechanisms are symmetrically arranged at the upper end and the lower end of the inner wall of the fixing ring, a hot melter is arranged between the two groups of pressure maintaining mechanisms on the inner wall of the fixing ring, and an included angle between the hot melter and the pressure maintaining mechanisms is a right angle; the pressure maintaining mechanism comprises two groups of vertical supports which are symmetrically arranged and two groups of arc-shaped plates which are rotatably arranged between the vertical supports, and the arc-shaped plates are hinged through a hinge shaft which is erected between the vertical supports; hinged plates which are mutually crossed are arranged between the two groups of vertical supports and below the arc-shaped plate, and the two groups of hinged plates are hinged through a lifting rod which is erected between the two groups of vertical supports;

the bottom end of the hinged plate is provided with a guide rod parallel to the lifting rod, two sides of the vertical support are symmetrically provided with a clip-shaped frame, the tail end of the guide rod extends into the clip-shaped frame and is connected with the clip-shaped frame in a sliding manner, and the top end of the hinged plate is hinged with the outer annular surface of the arc-shaped plate; the pressure maintaining mechanism also comprises an electric push rod fixedly arranged on the inner wall of the fixing ring, and the tail end of the electric push rod is fixedly connected with the lifting rod;

the PPR water pipe hot-melt connection treatment process comprises the following steps:

and (5) fixing an S1 water pipe: inserting the marked PPR water pipe into the positioning hole, keeping the tail end of the PPR water pipe aligned, and locking and fixing the PPR water pipe by rotating the locking screw;

s2 heating the pipe orifice: the driving cylinder is shortened to drive the first moving plate and the second moving plate to be close to each other synchronously, and the outer surface of the PPR water pipe and the inner surface of the PPR water pipe are inserted into a die head of the hot melter simultaneously to be heated for several seconds;

s3 tube drawing transposition: the driving cylinder extends to drive the first moving plate and the second moving plate to be away from each other synchronously, the PPR water pipe is pulled out from the die head simultaneously, the incomplete gear is driven to rotate through the motor, the rotary table rotates for 90 degrees under the meshing transmission of the incomplete gear and the driven gear, and the PPR water pipe rotates to a pressure maintaining position along with the rotation of the rotary table;

s4 alignment plug: the driving cylinder is shortened to drive the first moving plate and the second moving plate to synchronously approach, and the end parts of the two PPR water pipes are mutually sleeved;

s5 pressure maintaining and fixing: the electric push rod is driven to extend to drive the two groups of hinged plates to approach each other, the arc-shaped plates are held by the jacking force of the hinged plates, and the joint of the PPR water pipes is fixed under pressure maintaining until the two groups of PPR water pipes are completely cooled;

s6 pipe dismantling: the driving electric push rod is shortened, the arc-shaped plate is opened, the locking screw is unscrewed, and the connected PPR water pipe is pulled out from the positioning hole.

Preferably, the top of bottom plate is provided with two slide rails that extend along its length direction, and the one end of slide rail extends to the outer edge of bottom plate, and the other end extends to the outer edge of fixed plate, and the corresponding logical groove has been seted up to the position that the bottom of second movable plate corresponds the slide rail, and the slide rail runs through logical groove.

Preferably, a center hole is formed in the center of the turntable, a through hole is formed in the side wall of the fixing frame, one end of the connecting shaft is fixedly arranged in the center hole, and the other end of the connecting shaft is rotatably connected with the through hole through a bearing.

Preferably, the centre bore comprises round hole and the rectangle through-hole that the multiunit was seted up in the round hole periphery, and the rectangle through-hole is even annular distribution in the round hole periphery, and the outer wall integrated into one piece of connecting axle has the rectangle arch with rectangle through-hole matched with.

Preferably, the side wall of the rotating disc is provided with a shaft hole corresponding to the position of the rotating shaft, the shaft hole extends to the side wall of the fixing frame, and the rotating shaft penetrates through the shaft hole.

Preferably, the one end of locking screw rotates through the bearing and is connected with the stripper plate, stripper plate and the outer wall in close contact with of PPR water pipe, and other end fixedly connected with handle, keep certain clearance between the terminal of PPR water pipe and the inside wall of mount.

Preferably, the position of the inner side wall of the vertical support corresponding to the lifting rod is provided with a waist-shaped groove extending along the length direction of the lifting rod, and the tail end of the lifting rod extends into the waist-shaped groove.

Preferably, the connecting springs are provided with a plurality of groups and are uniformly and linearly distributed along the length direction of the second moving plate.

Advantageous effects

1. The air cylinder is matched with the fixed pulley, so that the air cylinder drives the two groups of turntables to synchronously approach or separate, the pipe fittings are fixed in the turntables and can simultaneously move for the same distance, the two incomplete gears are driven to rotate by the rotating shaft, the two groups of turntables simultaneously rotate for the same angle, the pipe fittings cannot be skewed when aligned and spliced, and the error is smaller compared with the error caused by manual operation;

2. according to the invention, the arc-shaped plates are used for pressure maintaining and fixing the joints of the pipe fittings, so that the cooling and shaping of the pipe fittings are accelerated, the pipe fittings do not shake or move, and through setting multiple stations, hot melting and pressure maintaining and fixing can be simultaneously carried out on two groups of pipe fittings.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a flow chart of the present invention;

FIG. 2 is a first perspective view of the present invention;

FIG. 3 is a perspective view of the present invention from a second perspective;

FIG. 4 is a cut-away view of the turntable of the present invention;

FIG. 5 is a schematic structural view of the turntable of the present invention;

FIG. 6 is a schematic view of the construction of a fusion apparatus of the present invention;

FIG. 7 is a perspective view of the retaining ring and pressure maintaining mechanism of the present invention;

FIG. 8 is an enlarged schematic view of area A of FIG. 7 in accordance with the present invention;

fig. 9 is an enlarged view of region B of fig. 6 according to the present invention.

In the figure: 10. a base plate; 11. a fixing plate; 12. a first moving plate; 13. a second moving plate; 14. a cylinder; 15. a connecting spring; 16. a fixed pulley; 17. pulling a rope; 18. a slide rail; 20. a fixing device; 21. a fixed mount; 211. a through hole; 22. a turntable; 221. a central bore; 222. a shaft hole; 223. positioning holes; 224. locking the screw rod; 225. a pressing plate; 226. a handle; 23. a connecting shaft; 24. a motor; 25. a rotating shaft; 26. an incomplete gear; 27. a driven gear; 30. a PPR water pipe; 40. a welding device; 41. a fixing ring; 42. a hot melter; 43. a pressure maintaining mechanism; 431. a vertical support; 4311. a waist-shaped groove; 4312. a clip frame; 432. an arc-shaped plate; 433. a hinge plate; 4331. a guide bar; 434. a lifting rod; 435. an electric push rod.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 2 to 5, a PPR water pipe hot-melt connection processing technology adopts a hot-melt connection machine, the hot-melt connection machine includes a bottom plate 10 and fixing devices 20 arranged on the top of the bottom plate 10, the fixing devices 20 are fixed with PPR water pipes 30, and a welding device 40 for connecting two PPR water pipes 30 is arranged between two sets of fixing devices 20 on the top of the bottom plate 10;

a fixed plate 11 is fixedly installed at the center of the top of the bottom plate 10, a first moving plate 12 and a second moving plate 13 are respectively arranged on two sides of the fixed plate 11 in a sliding manner, the fixed plate 11 is fixedly connected with the first moving plate 12 through an air cylinder 14, and the fixed plate 11 is fixedly connected with the second moving plate 13 through a plurality of groups of connecting springs 15 which are uniformly and linearly distributed; the top of the bottom plate 10 is provided with a fixed pulley 16 near one end of the second movable plate 13, the fixed pulleys 16 are symmetrically provided with two groups, the two groups are respectively positioned at the front side and the rear side of the top of the bottom plate 10, the outer wall of the first movable plate 12 is fixedly connected with a pull rope 17, and the tail end of the pull rope 17 is connected with the outer wall of the second movable plate 13 after being changed in direction by the fixed pulley 16; when the cylinder 14 pushes the first moving plate 12 to move outwards, the second moving plate 13 moves in the opposite direction for the same distance under the action of the pulling force of the pulling rope 17, at this time, the connecting spring 15 is under the pulling force and is in a stretching state, the top of the bottom plate 10 is provided with two sliding rails 18 extending along the length direction of the bottom plate, one ends of the sliding rails 18 extend to the outer edge of the bottom plate 10, the other ends of the sliding rails 18 extend to the outer edge of the fixed plate 11, the bottom of the second moving plate 13 is provided with corresponding through grooves corresponding to the positions of the sliding rails 18, the sliding rails 18 penetrate through the through grooves, and the sliding rails 18 play a guiding and limiting role;

the fixing device 20 comprises a fixing frame 21 fixed on the first moving plate 12 and the second moving plate 13, the fixing frame 21 is in an inverted V shape, the side wall of the corner of the fixing frame 21 is provided with a through hole 211, the inner side of the fixing frame 21 is provided with a rotating disc 22, the center of the rotating disc 22 is provided with a center hole 221, the center hole 221 is composed of a circular hole and a plurality of groups of rectangular through holes arranged on the periphery of the circular hole, the rectangular through holes are uniformly and annularly distributed on the periphery of the circular hole, a connecting shaft 23 is arranged in the center hole 221, rectangular bulges matched with the rectangular through holes are integrally formed on the outer wall of the connecting shaft 23, the connecting shaft 23 extends into the through hole 211 and is rotatably connected with the through;

one side of the outer wall of one group of the fixing frames 21, which is far away from the rotating disc 22, is fixedly provided with a motor 24, the output end of the motor 24 is fixedly connected with a rotating shaft 25, the rotating shaft 25 sequentially penetrates through the fixing frames 21 and the two groups of the rotating discs 22 to be led to the outer side of the other group of the fixing frames 21, the position, corresponding to the rotating shaft 25, of the side wall of the rotating disc 22 is provided with a shaft hole 222, and the shaft; the tail end of the connecting shaft 23 is coaxially connected with a driven gear 27, an incomplete gear 26 meshed with the driven gear 27 is fixedly sleeved on the rotating shaft 25, when the motor 24 drives the rotating shaft 25 to rotate, the connecting shaft 23 synchronously rotates under the meshing transmission of the incomplete gear 26 and the driven gear 27, the incomplete gear 26 rotates for a circle to drive the driven gear 27 to rotate for 90 degrees, and the two groups of rotating discs 22 synchronously rotate under the drive of the connecting shaft 23;

positioning holes 223 are formed in the side wall of the rotary table 22 close to the periphery, four groups of positioning holes 223 are formed in the periphery of the central hole 221, the PPR water pipe 30 is horizontally arranged in the positioning holes 223, the tail ends of the PPR water pipe 30 are flush, a threaded hole leading to the positioning holes 223 is formed in the outer edge of the rotary table 22, a locking screw 224 is screwed in the threaded hole, one end of the locking screw 224 is rotatably connected with an extrusion plate 225 through a bearing, the other end of the locking screw 224 is fixedly connected with a handle 226, the handle 226 is rotated, and the extrusion plate 225 is tightly contacted with the outer wall of the PPR water pipe 30 under the spiral feeding effect of the locking screw 224 to lock and fix the PPR water pipe 30; a certain gap is kept between the tail end of the PPR water pipe 30 and the inner side wall of the fixing frame 21, so that the PPR water pipe 30 is prevented from being subjected to the resistance of the fixing frame 21 during rotation;

as shown in fig. 2 and 6, the fusion apparatus 40 includes a fixing ring 41 fixed on the fixing plate 11, the fixing ring 41 is composed of a circular ring and a trapezoidal support integrally formed at the bottom of the circular ring, the trapezoidal support is fixed at the top of the fixing plate 11, pressure maintaining mechanisms 43 are symmetrically arranged at the upper and lower ends of the inner wall of the fixing ring 41, a hot melt device 42 is arranged between two sets of pressure maintaining mechanisms 43 on the inner wall of the fixing ring 41, and an included angle between the hot melt device 42 and the pressure maintaining mechanisms 43 is a right angle;

as shown in fig. 7 to 9, the pressure maintaining mechanism 43 includes two sets of vertical supports 431 symmetrically arranged, the two sets of vertical supports 431 are respectively located at two sides of the fixed ring 41, two sets of arc-shaped plates 432 are rotatably arranged between the two sets of vertical supports 431, and the two sets of arc-shaped plates 432 are hinged with each other through a hinge shaft erected between the vertical supports 431; hinged plates 433 which are mutually crossed are arranged between the two groups of vertical supports 431 and below the arc-shaped plate 432, the two groups of hinged plates 433 are hinged through a lifting rod 434 erected between the two groups of vertical supports 431, a waist-shaped groove 4311 which extends along the length direction of the inner side wall of each vertical support 431 is formed in a position corresponding to the lifting rod 434, and the tail end of the lifting rod 434 extends into the waist-shaped groove 4311;

a guide rod 4331 parallel to the lifting rod 434 is arranged at the bottom end of the hinged plate 433, a clip-shaped frame 4312 is symmetrically arranged on two sides of the vertical support 431, the tail end of the guide rod 4331 extends into the clip-shaped frame 4312 and is in sliding connection with the clip-shaped frame 4312, and the top end of the hinged plate 433 is hinged with the outer annular surface of the arc plate 432; the pressure maintaining mechanism 43 further comprises an electric push rod 435 fixedly installed on the inner wall of the fixing ring 41, and the tail end of the electric push rod 435 is fixedly connected with a circular tube sleeved outside the lifting rod 434; when the electric push rod 435 extends, the round tube drives the lifting rod 434 to slide along the waist-shaped groove 4311 to the arc-shaped plate 432, at this time, the guide rod 4331 slides along the clip-shaped frame 4312 to the vertical support 431, the top ends of the hinge plates 433 move inwards around the lifting rod 434, the included angle between the two hinge plates 433 gradually decreases, the arc-shaped plate 432 is held by the holding force of the hinge plates 433, and the pressure maintaining fixation is performed on the joint of the PPR water pipe 30;

as shown in fig. 1, the PPR water pipe hot-melt joining treatment process includes the following steps:

and (5) fixing an S1 water pipe: inserting the marked PPR water pipe 30 into the positioning hole 223, keeping the tail end of the PPR water pipe 30 aligned, and locking and fixing the PPR water pipe 30 by rotating the locking screw 224;

s2 heating the pipe orifice: the driving cylinder 14 is shortened to drive the first moving plate 12 and the second moving plate 13 to be close to each other synchronously, and the outer surface of the PPR water pipe 30 and the inner surface of the PPR water pipe 30 are inserted into a die head of the hot melting device 42 simultaneously to be heated for several seconds;

s3 tube drawing transposition: the driving cylinder 14 extends to drive the first moving plate 12 and the second moving plate 13 to be away from each other synchronously, the PPR water pipe 30 is pulled out from the die head simultaneously, the incomplete gear 26 is driven to rotate through the motor 24, the rotary disc 22 rotates for 90 degrees under the meshing transmission of the incomplete gear 26 and the driven gear 27, and the PPR water pipe 30 rotates to the pressure maintaining position along with the rotation;

s4 alignment plug: the driving cylinder 14 is shortened to drive the first moving plate 12 and the second moving plate 13 to synchronously approach, and the end parts of the two groups of PPR water pipes 30 are mutually sleeved;

s5 pressure maintaining and fixing: the electric push rod 435 is driven to extend to drive the two groups of hinged plates 433 to approach each other, the arc-shaped plates 432 are held by the jacking force of the hinged plates 433 to hold the pressure of the joint of the PPR water pipes 30 and fix the joint until the two groups of PPR water pipes 30 are completely cooled;

s6 pipe dismantling: the electric push rod 435 is driven to shorten, the arc-shaped plate 432 is opened, the locking screw 224 is unscrewed, and the connected PPR water pipe 30 is drawn out from the positioning hole 223.

When the PPR water pipe hot melting device is used, the time from alignment insertion of the PPR water pipe 30 to unscrewing of the locking screw 224 does not exceed the time for hot melting of the PPR water pipe 30, and the phenomenon that the connected PPR water pipe 30 is pulled out when the PPR water pipe 30 is pulled out of a die head after hot melting is finished is avoided.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.