PPR plastic pipe and processing device thereof

Abstract

The application relates to the technical field of plastic pipes, in particular to a PPR plastic pipe and a processing device thereof. The PPR plastic pipe comprises PPR material, antioxidants, toughening agents and functional additives, and the preparation raw materials of the PPR plastic pipe are composed of the following components in terms of weight: antioxidants 0.4-1.8 parts, toughening agents 0.06-0.7 parts, functional additives 0.04-0.17 parts, and the rest is PPR material; the sum of the above components is 100 parts; the toughening agent is an organic toughening agent, which can be any one of sorbitol derivatives, bis-epoxide compounds and bio-based nucleating agents; and the weight fraction of the functional additives is specifically composed of 0.02-0.09 parts of a filler and 0.02-0.08 parts of a lubricant. The organic toughening agent is used to replace the dibasic carboxylic acid metal salt nucleating agent, the organic toughening agent is mainly derived from natural resources or biodegradable materials, and the pollution degree to the environment is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic pipe, in particular to a PPR plastic pipe and a processing device thereof. BACKGROUND

[0002] PPR plastic pipe is a high-quality pipe widely used in building water supply and drainage system, heating system and industrial pipe system. The production of PPR pipe usually includes the following steps: raw material preparation, extrusion molding and cooling and shaping. In the preparation of PPR plastic pipe, nucleating agent is usually added to improve the crystallization process of PPR material and improve the mechanical strength of PPR pipe. However, the nucleating agent used in the traditional PPR plastic pipe raw material is mainly binary carboxylic acid metal salt nucleating agent. This kind of nucleating agent contains cadmium, lead and other highly toxic metals, which poses a serious threat to the ecological environment in the production process of PPR plastic pipe. Therefore, a new type of PPR plastic pipe is needed to reduce the harm to the ecological environment in its production. SUMMARY

[0003] In order to overcome the shortcomings in the background art, the present application provides a PPR plastic pipe and a processing device thereof.

[0004] The technical scheme is as follows: a PPR plastic pipe, comprising:

[0005] PPR material, antioxidant, toughening agent and functional additive, the PPR plastic pipe preparation raw material is composed of: antioxidant 0.4-1.8 parts, toughening agent 0.06-0.7 parts, functional additive 0.04-0.17 parts, and the rest is PPR material. The sum of the above components is 100 parts.

[0006] Further, the toughening agent is an organic toughening agent, which can be any one of sorbitol derivative, bis-epoxide compound and bio-based nucleating agent.

[0007] Further, the weight fraction of the functional additive is specifically composed of 0.02-0.09 parts of filler and 0.02-0.08 parts of lubricant.

[0008] A processing device of PPR plastic pipe, based on the above-mentioned PPR plastic pipe, comprising:

[0009] A machine body, the machine body is provided with a heating device and a clamping device;

[0010] A sliding device, slidingly connected to the machine body, the sliding device is fixedly connected with a mold;

[0011] A rotating rod, rotatingly and slidingly connected to the sliding device, the rotating rod is rotatingly and slidingly connected with the mold, and the rotating rod is sealingly rotatingly connected with a sleeve ring;

[0012] N-shaped frames are arranged on the sleeve, and the N-shaped frames are rotationally connected with rollers.

[0013] Further, the application also comprises:

[0014] A guide shell is fixed to the mold, the rotating rod is rotationally and slidingly connected with the guide shell, the guide shell is provided with V-shaped grooves corresponding to the number of the N-shaped frames, and the N-shaped frames pass through adjacent V-shaped grooves on the guide shell.

[0015] A supporting assembly is arranged on the rotating rod, and the supporting assembly is used for preventing the rollers from rotating with the plastic pipes.

[0016] Further, the supporting assembly comprises:

[0017] A sliding plate is slidingly connected with the sliding device, the sliding plate is fixedly connected with a motor, and an output shaft of the motor is fixedly connected with the rotating rod.

[0018] A plurality of sliding rods are slidingly connected with the guide shell.

[0019] An extrusion disc is spline-connected with the rotating rod, the rotating rod is rotationally connected with a fixing shell, and the sliding rods are fixedly connected with the fixing shell.

[0020] A plurality of friction frames are slidingly connected with the fixing shell, the plurality of friction frames are uniformly distributed in a circumferential direction, the extrusion disc is provided with protrusions corresponding to the number of the friction frames, the protrusions of the extrusion disc are used for extruding adjacent friction frames, the friction frames are fixedly connected with rectangular plates, and first elastic members are fixedly connected between the rectangular plates and the fixing shell.

[0021] A limiting assembly is arranged on the rotating rod, and the limiting assembly is used for changing the movement state of the rotating rod.

[0022] Further, the limiting assembly comprises:

[0023] A limiting block is fixedly connected with the rotating rod, the sliding device is provided with a rectangular notch, the rectangular notch of the sliding device is used for allowing the limiting block to move, and the rotating rod passes through the rectangular notch of the sliding device.

[0024] A limiting ring is fixedly connected with the sliding device, and the limiting ring is used for limiting the limiting block.

[0025] An unlocking assembly is arranged on the extrusion disc, and the unlocking assembly is used for automatically releasing the extrusion of the extrusion disc on the friction frame.

[0026] Further, the unlocking assembly comprises:

[0027] An extruding column is fixed to the guide shell, and the fixed shell is provided with a through hole for the extruding column to pass through;

[0028] A disc is rotationally connected to the extruding disc, the extruding column is used for extruding the disc, and a second elastic member is fixed between the disc and the fixed shell;

[0029] A reset assembly is arranged on the sliding device, and the reset assembly is used for quickly driving the rotating rod to reset.

[0030] Further, the reset assembly comprises:

[0031] A limiting plate is fixed to the sliding device, a rotating plate is slidingly connected to the limiting plate, the rotating plate is rotationally connected to the rotating rod, and a third elastic member is fixed between the rotating plate and the sliding device.

[0032] Further, the reset assembly further comprises:

[0033] An extruding assembly is arranged on the guide shell, and the extruding assembly is used for trimming the softening sag of the pipe, and the extruding assembly comprises:

[0034] A hydraulic telescopic rod is fixed to the guide shell, and a fixed part of the hydraulic telescopic rod is fixed to the fixed shell;

[0035] A plurality of sealing rings are fixed to the sleeve ring, the n-shaped frame is sealingly and slidingly connected to the adjacent sealing ring, the rotating rod is provided with a blind hole, the fixed part of the hydraulic telescopic rod is communicated with the blind hole of the rotating rod through a pipeline, the sleeve ring is provided with a plurality of oil guide holes corresponding to the n-shaped frame, and the sealing ring is communicated with the oil guide hole of the sleeve ring.

[0036] The present application has the following advantages: 1. The organic toughening agent is used instead of the dibasic carboxylic acid metal salt nucleating agent, and the organic toughening agent mainly comes from natural resources or biodegradable materials compared with the dibasic carboxylic acid metal salt nucleating agent, so that the pollution degree of the environment is effectively reduced.

[0037] 2. The inner wall and the outer wall of the pipe are clamped by the friction frame and the clamping device, so that the inner wall and the outer wall of the pipe are clamped at the same time, the clamping force on the pipe is strengthened, the probability of pipe sliding is reduced, the axis of the pipe coincides with the axis of the rotating rod, the mold can enter the pipe along the axis of the pipe, and the quality of the pipe after flanging is improved.

[0038] 3. The convex on the inner wall of the pipe is flattened by the reciprocating rotation of the roller, so that the convex on the inner wall of the pipe is not moved when the mold extrudes the inner wall of the pipe, the flanged part of the pipe is not recessed, and the sealing performance during subsequent pipe connection is ensured.

[0039] 4、The application realizes the expansion reset of the depression at the pipe port and the flattening of the protrusion on the inner wall of the pipe by the continuous outward extension of the roller and the rotation along the inner wall of the pipe, and ensures that the die can enter the pipe and tightly adhere to the inner wall of the pipe during the flanging, thereby improving the quality of the flanged pipe. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 It is a schematic diagram of the three-dimensional structure of the application;

[0041] Figure 2 It is a schematic diagram of the three-dimensional structure of the clamping device and the sliding device of the application;

[0042] Figure 3 It is a schematic diagram of the three-dimensional structure of the die and the sliding plate of the application;

[0043] Figure 4 It is a schematic diagram of the three-dimensional structure of the roller and the guide shell of the application;

[0044] Figure 5 It is a schematic diagram of the three-dimensional structure of the sleeve ring and the n-shaped frame of the application;

[0045] Figure 6 It is a schematic diagram of the three-dimensional structure of the die and the rotating rod of the application;

[0046] Figure 7 It is a sectional view of the three-dimensional structure of the sleeve ring and the sealing ring of the application;

[0047] Figure 8 It is a schematic diagram of the three-dimensional structure of the extrusion column and the hydraulic telescopic rod of the application;

[0048] Figure 9 It is a schematic diagram of the three-dimensional structure of the disc and the second elastic member of the application;

[0049] Figure 10 It is a schematic diagram of the three-dimensional structure of the extrusion disc and the friction frame of the application;

[0050] Figure 11 It is an exploded view of the extrusion disc and the disc of the application;

[0051] Figure 12 It is a schematic diagram of the three-dimensional structure of the rotating plate and the third elastic member of the application;

[0052] Figure 13 It is an exploded view of the sliding device and the third elastic member of the application;

[0053] Figure 14 It is an exploded view of the limiting block and the limiting ring of the application.

[0054] In the above figure: 1: machine body, 2: heating device, 3: clamping device, 4: sliding device, 5: mold, 6: rotating rod, 601: collar, 7: n-shaped frame, 8: roller, 9: guide shell, 1101: sliding plate, 1102: motor, 1103: sliding rod, 1104: extrusion disc, 1105: fixed shell, 1106: friction frame, 1107: rectangular plate, 1108: first elastic piece, 1201: limiting block, 1202: limiting ring, 1301: extrusion column, 1302: disc, 1303: second elastic piece, 1401: limiting plate, 1402: rotating plate, 1403: third elastic piece, 1501: hydraulic telescopic rod, 1502: sealing ring. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0056] Embodiment 1: A PPR plastic pipe material, comprising: PPR material, antioxidant, toughening agent, functional additive, the preparation raw material of the PPR plastic pipe material is composed of: antioxidant 0.4-1.8 parts, toughening agent 0.06-0.7 parts, functional additive 0.04-0.17 parts, and the rest is PPR material, the sum of the above components is 100 parts.

[0057] In the present application: the toughening agent is an organic toughening agent, which can use any one of sorbitol derivatives, bis-epoxide compounds and bio-based nucleating agents.

[0058] In the above scheme, the organic toughening agent is mainly derived from natural resources or biodegradable materials, which effectively reduces the pollution degree to the environment, the sorbitol derivative can effectively increase the crystallization rate of the PPR material, the bis-epoxide compound can improve the impact strength of the PPR plastic pipe material, and the bio-based nucleating agent is a compound extracted from vegetable oil, which has good biodegradability.

[0059] In the present application: the weight fraction of the functional additive is specifically composed of 0.02-0.09 parts of a filler and 0.02-0.08 parts of a lubricant.

[0060] In the above scheme, the filler is used to enhance the strength of the PPR plastic pipe material and make the pipe material more easily extruded, and the lubricant is used to form an isolation film on the surface of the pipe material to prevent the pipe material from adhering to the metal tool, and facilitate demolding.

[0061] The existing PPR plastic pipe needs to use a flanging device to perform flanging processing on the port of the pipe after production is completed, in order to facilitate subsequent installation, connection of accessories and other application requirements.

[0062] When the existing flanging device flanges the PPR plastic pipe, the PPR plastic pipe needs to be heated by using a heating device first, so that the port of the PPR plastic pipe is softened. However, when the heating device malfunctions, the PPR plastic pipe will be overheated, causing a protrusion to appear on the inner wall of the PPR plastic pipe. During the flanging process, the mold will extrude the inner wall of the PPR plastic pipe and move the protrusion on the inner wall of the PPR plastic pipe, causing the flanged part of the PPR plastic pipe to be concave, which affects the sealing performance when the PPR plastic pipe is connected subsequently.

[0063] Embodiment 2: Based on embodiment 1, a processing device for a PPR plastic pipe is provided based on the above-mentioned PPR plastic pipe, which is combined with Figures 1-8 As shown in the figure, it comprises: a machine body 1, the machine body 1 is provided with a heating device 2 and a clamping device 3; a sliding device 4 is slidingly connected to the machine body 1, and the sliding device 4 is fixedly connected with a mold 5; a rotating rod 6 is rotatingly and slidingly connected to the sliding device 4, and the rotating rod 6 is rotatingly and slidingly connected with the mold 5, and the rotating rod 6 is sealingly rotatingly connected with a sleeve ring 601; a plurality of n-shaped frames 7 are provided on the sleeve ring 601, and each n-shaped frame 7 is rotatingly connected with a roller 8.

[0064] In the above scheme, the machine body 1 is an existing device, and the machine body 1 is provided with a control terminal and a conveying device for conveying the PPR plastic pipe. The conveying device on the machine body 1 is electrically connected with the control terminal on the machine body 1, for conveying the PPR plastic pipe (hereinafter referred to as pipe). The heating device 2 is an existing device for heating and softening the port of the pipe. The clamping device 3 is an existing device for clamping the pipe during flanging. The sliding device 4 is composed of an electric guide rail and a rectangular frame, and the sliding device 4 is used to move the mold 5. The electric guide rail of the heating device 2, the clamping device 3 and the sliding device 4 is electrically connected with the control terminal on the machine body 1. The rotating rod 6 is composed of two circular rods and a connecting column connecting the two circular rods. The sleeve ring 601 is located between the two circular rods of the rotating rod 6. The number of n-shaped frames 7 is four, and the four n-shaped frames 7 are evenly distributed in the circumferential direction, for applying stable extrusion force to the inner wall of the pipe. In this embodiment, the n-shaped frame 7 and the sleeve ring 601 can be considered as fixedly connected. The diameter of the circle circumscribed by the four rollers 8 is equal to the inner diameter of the pipe, for ensuring that the mold 5 can enter the pipe and be in close contact with the pipe.

[0065] In combination with Figures 3-7As shown, the device further comprises a guide shell 9 fixed to the mold 5, the rotating rod 6 is rotatably and slidably connected to the guide shell 9, the guide shell 9 is provided with V-shaped grooves consistent with the number of the n-shaped frames 7, and the n-shaped frames 7 pass through adjacent V-shaped grooves on the guide shell 9; a supporting assembly arranged on the rotating rod 6, the supporting assembly is used to prevent the roller 8 from rotating with the plastic pipe.

[0066] In the above scheme, the number of V-shaped grooves on the guide shell 9 is four, the guide shell 9 is made of smooth material such as stainless steel, which is used to reduce the friction on the four n-shaped frames 7, and the maximum angle of rotation of the four n-shaped frames 7 in one direction along adjacent V-shaped grooves on the guide shell 9 is greater than 360°, which is used to realize the flattening of the entire inner wall surface of the heated and softened part of the pipe.

[0067] In combination with Figure 3 , Figure 4 and Figures 8-10 , the supporting assembly comprises a sliding plate 1101 slidably connected to the sliding device 4, the sliding plate 1101 is fixedly connected with a motor 1102, the output shaft of the motor 1102 is fixedly connected with the rotating rod 6; a plurality of sliding rods 1103 are slidably connected to the guide shell 9; a pressing disc 1104 is spline-connected to the rotating rod 6, the rotating rod 6 is rotatably connected with a fixed shell 1105, the sliding rods 1103 are fixedly connected with the fixed shell 1105; a plurality of friction frames 1106 are slidably connected to the fixed shell 1105, the plurality of friction frames 1106 are evenly distributed in the circumferential direction, the pressing disc 1104 is provided with protrusions equal in number to the friction frames 1106, the protrusions of the pressing disc 1104 are used to press adjacent friction frames 1106, the friction frames 1106 are fixedly connected with rectangular plates 1107, and the rectangular plates 1107 are fixedly connected with first elastic members 1108 between the fixed shell 1105; a limiting assembly arranged on the rotating rod 6, the limiting assembly is used to change the movement state of the rotating rod 6.

[0068] In the above scheme, the motor 1102 is electrically connected with the control terminal on the fuselage 1, the number of the sliding rods 1103 is four, the four sliding rods 1103 are evenly distributed in the circumferential direction, which is used to increase the torsional resistance of the fixed shell 1105, the pressing disc 1104 is provided with four protrusions, the number of the friction frames 1106 is four, the convex surface of the friction frame 1106 is provided with a friction strip, which is used to increase the friction between the friction frame 1106 and the pipe, the first elastic member 1108 is a spring, and the number of the first elastic members 1108 is eight, the eight first elastic members 1108 are divided into two groups, and the two first elastic members 1108 in each group are located on the two sides of adjacent friction frames 1106.

[0069] In combination with Figure 3 and Figures 12-14As shown, the limiting assembly comprises: a limiting block 1201 fixed to the rotating rod 6, the sliding device 4 is provided with a rectangular notch, the rectangular notch of the sliding device 4 is used for moving the limiting block 1201, and the rotating rod 6 penetrates through the rectangular notch of the sliding device 4; a limiting ring 1202 fixed to the sliding device 4, the limiting ring 1202 is used for limiting the limiting block 1201; and an unlocking assembly arranged on the extrusion disc 1104, the unlocking assembly is used for automatically releasing the extrusion of the extrusion disc 1104 on the friction frame 1106.

[0070] In the above scheme, the number of limiting blocks 1201 is two, and the two limiting blocks 1201 are symmetrically distributed on both sides of the rotating rod 6, and the right side surface of the limiting ring 1202 is made of elastic material and is used for buffering when colliding with the limiting block 1201.

[0071] In combination Figures 8-11 As shown, the unlocking assembly comprises: an extrusion column 1301 fixed to the guide shell 9, the fixed shell 1105 is provided with a through hole through which the extrusion column 1301 penetrates; a disc 1302 rotationally connected to the extrusion disc 1104, the extrusion column 1301 is used for extruding the disc 1302, and a second elastic member 1303 is fixed between the disc 1302 and the fixed shell 1105; and a reset assembly arranged on the sliding device 4, the reset assembly is used for quickly driving the rotating rod 6 to reset.

[0072] In the above scheme, the number of extrusion columns 1301 is two, and the two extrusion columns 1301 are symmetrically distributed, which is used for stably pushing the disc 1302, the distance from the left side surface of the extrusion column 1301 to the right side surface of the disc 1302 is less than the distance between the leftmost end and the rightmost end of the V-shaped groove on the guide shell 9, which is used for ensuring that the extrusion column 1301 can drive the extrusion disc 1104 to move leftwards through the disc 1302, thereby releasing the extrusion of the extrusion disc 1104 on the friction frame 1106, the diameter of the disc 1302 is less than the minimum diameter of the fixed shell 1105, which is used for preventing the disc 1302 from rubbing against the fixed shell 1105 when moving, the number of through holes provided on the fixed shell 1105 is two, which is used for allowing the adjacent extrusion columns 1301 to penetrate through, the second elastic member 1303 is a tension spring, and the number of second elastic members 1303 is two.

[0073] In combination Figure 3 And Figures 12-14 As shown, the reset assembly comprises: a limiting plate 1401 fixed to the sliding device 4, the limiting plate 1401 is slidingly connected with a rotating plate 1402, the rotating plate 1402 is rotationally connected with the rotating rod 6, and a third elastic member 1403 is fixed between the rotating plate 1402 and the sliding device 4.

[0074] In the above scheme, the limiting plate 1401 is made of smooth material, such as stainless steel, the vertical section shape of the rotating plate 1402 is T-shaped, the rotating plate 1402 is made of hard smooth material, such as stainless steel, which is used to reduce the friction between the limiting plate 1401 and the rotating plate 1402, and to reduce the stress concentration on the rotating plate 1402, the number of the third elastic members 1403 is two, the third elastic members 1403 are tension springs, and are initially in the tension storage state, which is used to ensure that the left side surface of the limiting block 1201 is in contact with the right side surface of the limiting ring 1202.

[0075] In the use of the device, first, the pipe to be processed is placed on the conveying device on the machine body 1, then the conveying device on the machine body 1 is started through the control terminal on the machine body 1, the port of the pipe is conveyed into the heating device 2, and finally the heating device 2 is started through the control terminal on the machine body 1 to heat the port of the pipe.

[0076] After the port of the pipe is heated to soften, the port of the pipe is moved out of the heating device 2 and to the left of the clamping device 3 by the conveying device of the machine body 1, the conveying device of the machine body 1 drives the pipe to move to the right, and when the softened port of the pipe passes through the clamping device 3 to reach the flanging position, the conveying device of the machine body 1 stops driving the pipe to move, and the clamping device 3 clamps and fixes the pipe.

[0077] When the clamping device 3 completes the clamping of the pipe, the sliding device 4 is controlled to move to the left through the control terminal of the machine body 1, the sliding device 4 drives the rotating rod 6 to move to the left through the limiting block 1201, the rotating rod 6 drives the sliding plate 1101, the motor 1102, the fixed shell 1105 and the parts in the fixed shell 1105 to move to the left, the rotating rod 6 drives the sleeve ring 601 to move to the left, the sleeve ring 601 drives the n-shaped frame 7 and the roller shaft 8 to move to the left, the sliding device 4 drives the mold 5 to move to the left, and the mold 5 drives the guide shell 9 to move to the left.

[0078] When the roller shaft 8 moves to the left to the softened port of the pipe (the right side surface of the roller shaft 8 does not enter the pipe, and the friction frame 1106 is located at the part of the pipe that is not heated and softened), the motor 1102 is started, the output shaft of the motor 1102 drives the extrusion disc 1104 to rotate through the rotating rod 6, the fixed shell 1105 does not rotate under the fixation of the four sliding rods 1103, the protrusions on the extrusion disc 1104 extrude the adjacent friction frames 1106, the four friction frames 1106 simultaneously slide outward along the fixed shell 1105 to extrude the inner wall of the pipe, and at the same time, the eight first elastic members 1108 are compressed, and when the four friction frames 1106 slide outward along the fixed shell 1105 to the maximum distance, the motor 1102 is turned off.

[0079] When the rotating rod 6 rotates, the rotating rod 6 drives the two limiting blocks 1201 to rotate, the rectangular notch of the sliding device 4 removes the limiting of the two limiting blocks 1201, the rotating rod 6 stops moving to the left under the friction force generated by the four friction frames 1106 extruding the inner wall of the pipe, and forms the clamping of the inner wall and the outer wall of the pipe at the same time through the four friction frames 1106 closely adhering to the inner wall of the pipe and cooperating with the clamping device 3, which strengthens the clamping force of the pipe, reduces the probability of the pipe sliding to the left, and ensures that the axis of the pipe coincides with the axis of the rotating rod 6, so that the mold 5 can enter the pipe along the axis of the pipe, improving the quality of the pipe flanging.

[0080] When the rectangular notch of the sliding device 4 removes the limiting of the two limiting blocks 1201, the sliding device 4 continues to move to the left relative to the rotating rod 6, the sliding device 4 drives the guide shell 9 to move to the left along the sliding rod 1103 relative to the rotating rod 6 through the mold 5, the V-shaped groove of the guide shell 9 extrudes the adjacent n-shaped frame 7, so that the n-shaped frame 7 slides along the V-shaped groove of the adjacent guide shell 9, and the n-shaped frame 7 rotates clockwise relative to the rotating rod 6 (for example, taking the left view as an example). Figure 1 The four n-shaped frames 7 rotate clockwise to jointly drive the ring 601 to rotate clockwise, and at the same time, the n-shaped frame 7 drives the adjacent roller 8 to rotate clockwise closely adhering to the inner wall of the pipe, which flattens the protrusions on the inner wall of the pipe, and as the guide shell 9 moves to the left, the V-shaped groove on the guide shell 9 constantly extrudes the adjacent n-shaped frame 7, so that the n-shaped frame 7 rotates counterclockwise relative to the rotating rod 6 (for example, taking the left view as an example). Figure 1 Through the clockwise rotation and counterclockwise rotation of the n-shaped frame 7, the adjacent roller 8 rotates clockwise and counterclockwise, which flattens the protrusions on the inner wall of the pipe, so that when the mold 5 extrudes the inner wall of the pipe, the mold 5 will not drive the protrusions on the inner wall of the pipe to move to the left, ensuring that the flanged part of the pipe will not appear concave, and ensuring the sealing performance when the pipe is connected subsequently.

[0081] When the sliding device 4 continues to move to the left relative to the rotating rod 6, the rotating rod 6 drives the rotating plate 1402 to move to the right along the limiting plate 1401 relative to the sliding device 4, and the third elastic member 1403 is further stretched.

[0082] When the guide shell 9 moves to the left relative to the rotating rod 6, the guide shell 9 drives the extrusion column 1301 to move to the left through the through hole of the fixed shell 1105, the extrusion column 1301 continues to move to the left to extrude the disc 1302, the disc 1302 moves to the left under the extrusion of the extrusion column 1301, the second elastic member 1303 is stretched, the disc 1302 drives the extrusion disc 1104 to move to the left along the rotating rod 6, the extrusion disc 1104 removes the extrusion of the adjacent friction frame 1106, and the friction frame 1106 slides to the axis direction of the fixed shell 1105 under the action of the elastic force of the adjacent two first elastic members 1108, and no longer adheres to the inner wall of the pipe.

[0083] When the friction frame 1106 is no longer attached to the inner wall of the pipe, the rotating rod 6 moves left relative to the sliding device 4 under the action of the elasticity of the two third elastic members 1403, and the rotating rod 6 drives the rotating plate 1402, the sleeve ring 601, the two limiting blocks 1201 and the fixed shell 1105 to move left.

[0084] When the guide shell 9 moves left, the V-shaped groove thereon extrudes the adjacent n-shaped frame 7, so that the four n-shaped frames 7 first rotate clockwise and then rotate counterclockwise (as shown in the attached drawings), so as to restore the initial position of the n-shaped frame 7 relative to the guide shell 9. Figure 1 The left view is taken as an example, the fixed shell 1105 moves left to drive the four sliding rods 1103 to move left, so as to restore the initial position of the sliding rod 1103 relative to the guide shell 9.

[0085] When the two limiting blocks 1201 move left and contact with the limiting ring 1202, the rotating rod 6 can no longer move left relative to the sliding device 4, the motor 1102 is started, the output shaft of the motor 1102 drives the rotating rod 6 to rotate in the opposite direction and by the same angle as described above, the rotating rod 6 drives the extrusion disc 1104 and the two limiting blocks 1201 to rotate, so that the protrusions of the extrusion disc 1104 are restored to the initial position, and the sliding device 4 drives the rotating rod 6 to move again through the two limiting blocks 1201 and the limiting ring 1202.

[0086] When the protrusions of the extrusion disc 1104 are restored to the initial position, the disc 1302 slides right relative to the fixed shell 1105 under the action of the elasticity of the adjacent two second elastic members 1303, the disc 1302 drives the extrusion disc 1104 to slide right, so as to restore the initial position of the extrusion disc 1104 relative to the fixed shell 1105.

[0087] During the operation of the above-mentioned parts, the sliding device 4 continues to drive the mold 5 to move left to extrude the softened port of the pipe, flanges the softened port of the pipe, and then the sliding device 4 stops moving, after the flanged pipe port is cooled and formed, the sliding device 4 is started to move right, the sliding device 4 drives the attached parts thereon to move right to reset, completing the flanging of one pipe, and repeatedly performing the above-mentioned actions to realize the continuous flanging of the softened ports of multiple pipes. In subsequent embodiments, the n-shaped frame 7 and the sleeve ring 601 are not directly related, and the n-shaped frame 7 and the sealing ring 1502 are in sliding connection.

[0088] The existing flanging device needs to use a heating device to heat the PPR plastic pipe before flanging the PPR plastic pipe, so as to soften the port of the PPR plastic pipe. However, when the heating device fails, the upper side of the inner wall of the pipe will also be depressed, so that the mold will extrude the depression of the upper side of the inner wall of the pipe during flanging, causing the pipe to deform.

[0089] Embodiment 3: Based on embodiment 2,Figures 4-8 and Figure 10 As shown in FIG. 9 and FIG. 10, the device further comprises an extrusion assembly arranged on the guide shell 9, which is used to trim the softened sag of the pipe. The extrusion assembly comprises a hydraulic telescopic rod 1501 fixed to the guide shell 9, the telescopic end of the hydraulic telescopic rod 1501 being fixed to the fixed shell 1105; a plurality of sealing rings 1502, the number of which is consistent with the number of the n-shaped frames 7, each of which is fixed to the sleeve ring 601, the n-shaped frame 7 being in sealing sliding connection with the adjacent sealing ring 1502, the rotating rod 6 being provided with a blind hole, the fixed part of the hydraulic telescopic rod 1501 being in communication with the blind hole of the rotating rod 6 through a pipeline, and the sleeve ring 601 being provided with a plurality of oil guide holes consistent with the number of the n-shaped frames 7, the sealing ring 1502 being in communication with the oil guide hole of the sleeve ring 601.

[0090] In the above scheme, the diameter of the circle circumscribed by the four rollers 8 in the initial position is smaller than the minimum diameter of the mold 5, the fixed part of the hydraulic telescopic rod 1501, the pipeline between the fixed part of the hydraulic telescopic rod 1501 and the blind hole of the rotating rod 6, the cavity formed by the blind hole of the rotating rod 6 and the sleeve ring 601, and the sealing ring 1502 are all filled with hydraulic oil, the length of the fixed part of the hydraulic telescopic rod 1501 is smaller than the distance from the left side of the extrusion column 1301 to the right side of the disc 1302, so as to avoid the situation that the extrusion column 1301 cannot drive the disc 1302 to move, and the number of the sealing rings 1502 is four, and the number of the oil guide holes of the sleeve ring 601 is four.

[0091] The action of moving the guide shell 9 by the sliding device 4 in Example 2 is repeated, when the guide shell 9 moves left relative to the rotating rod 6, the guide shell 9 drives the fixed part of the hydraulic telescopic rod 1501 to move left, the telescopic end of the hydraulic telescopic rod 1501 remains stationary under the action of the fixed shell 1105, the hydraulic oil in the fixed part of the hydraulic telescopic rod 1501 flows through the blind hole of the rotating rod 6 and the four oil guide holes of the sleeve ring 601 under the extrusion of the telescopic end, and enters the four sealing rings 1502, the hydraulic oil in the sealing ring 1502 increases the extrusion on the adjacent n-shaped frame 7, the n-shaped frame 7 drives the roller 8 to slide outward, as the guide shell 9 continuously moves left relative to the rotating rod 6, the roller 8 continuously slides outward, until the inner diameter of the roller 8 is the same as the size of the non-softened area of the pipe, at this time, the two extrusion columns 1301 release the extrusion on the four friction frames 1106 by extruding the disc 1302, and the roller 8 continuously extends outward while rotating along the inner wall of the pipe, gradually supporting the sag at the port of the pipe and flattening the protrusions on the inner wall of the pipe, so as to ensure that the mold 5 can enter the pipe and tightly adhere to the inner wall of the pipe during flanging, and improve the quality of the flanged pipe.

[0092] The action of the rotating rod 6 driving the fixed shell 1105 to move left in Example 2 is repeated, the rotating rod 6 drives the fixed shell 1105 to move left relative to the guide shell 9, the fixed shell 1105 drives the telescopic end of the hydraulic telescopic rod 1501 to move left, the hydraulic oil in the sealing ring 1502 is pumped back to the fixed part of the hydraulic telescopic rod 1501, the n-shaped frame 7 drives the roller shaft 8 to slide along the axis direction of the rotating rod 6, and the reset of the n-shaped frame 7, the roller shaft 8 and the hydraulic telescopic rod 1501 is completed.

[0093] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A processing apparatus for PPR plastic pipes, characterized in that, include: The machine body (1) is equipped with a heating device (2) and a clamping device (3). The heating device (2) is used to heat and soften the end of the pipe, and the clamping device (3) is used to clamp the pipe when it is turned over. A sliding device (4) is slidably connected to the machine body (1), and a mold (5) is fixedly connected to the sliding device (4). Rotating rod (6) is rotatably and slidably connected to the sliding device (4). Rotating rod (6) is rotatably and slidably connected to the mold (5). Rotating rod (6) is sealed and rotatably connected with collar (601). Several n-shaped frames (7) are provided on the collar (601). The n-shaped frames (7) are rotatably connected to rollers (8). The diameter of the outer circle of all rollers (8) is equal to the inner diameter of the pipe, which is used to ensure that the mold (5) can enter the pipe and fit with it. Also includes: The guide shell (9) is fixed to the mold (5). The rotating rod (6) is rotatably and slidably connected to the guide shell (9). The guide shell (9) has V-shaped grooves in the same number as the n-shaped frame (7). The n-shaped frame (7) passes through the adjacent V-shaped grooves on the guide shell (9). A support assembly is provided on the rotating rod (6), and the support assembly is used to prevent the roller (8) from driving the plastic pipe to rotate; The support components include: A sliding plate (1101) is slidably connected to the sliding device (4), and a motor (1102) is fixedly connected to the sliding plate (1101). The output shaft of the motor (1102) is fixedly connected to the rotating rod (6). Several sliding rods (1103) are slidably connected to the guide shell (9). The extrusion disc (1104) is splined to the rotating rod (6), the rotating rod (6) is rotatably connected to the fixed shell (1105), and the sliding rod (1103) is fixedly connected to the fixed shell (1105). There are several friction frames (1106), all of which are slidably connected to the fixed shell (1105). The friction frames (1106) are evenly distributed in the circumference. The extrusion disc (1104) is provided with a number of protrusions equal to the number of friction frames (1106). The protrusions of the extrusion disc (1104) are used to extrude adjacent friction frames (1106). A rectangular plate (1107) is fixedly connected to each friction frame (1106). A first elastic element (1108) is fixedly connected between the rectangular plate (1107) and the fixed shell (1105). A limiting component is provided on the rotating rod (6), and the limiting component is used to change the movement state of the rotating rod (6).

2. The processing apparatus for PPR plastic pipes according to claim 1, characterized in that, The limiting component includes: The limiting block (1201) is fixed to the rotating rod (6). The sliding device (4) has a rectangular notch. The rectangular notch of the sliding device (4) is used for the limiting block (1201) to move. The rotating rod (6) passes through the rectangular notch of the sliding device (4). A limiting ring (1202) is fixed to the sliding device (4), and the limiting ring (1202) is used to limit the limiting block (1201). An unlocking component is disposed on the extrusion plate (1104), and the unlocking component is used to automatically release the extrusion plate (1104) from the friction frame (1106).

3. The processing apparatus for PPR plastic pipes according to claim 2, characterized in that, The unlocking component includes: The extrusion column (1301) is fixed to the guide shell (9), and the fixed shell (1105) has a through hole for the extrusion column (1301) to pass through; The disc (1302) is rotatably connected to the extrusion disc (1104), the extrusion column (1301) is used to extrude the disc (1302), and a second elastic element (1303) is fixed between the disc (1302) and the fixed shell (1105). A reset component is provided on the sliding device (4), and the reset component is used to quickly drive the rotating rod (6) to reset.

4. The processing apparatus for PPR plastic pipes according to claim 3, characterized in that, The reset component includes: A limiting plate (1401) is fixedly connected to the sliding device (4). The limiting plate (1401) is slidably connected to a rotating plate (1402). The rotating plate (1402) is rotatably connected to the rotating rod (6). A third elastic element (1403) is fixedly connected between the rotating plate (1402) and the sliding device (4).

5. The processing apparatus for PPR plastic pipes according to claim 4, characterized in that it further includes... include: An extrusion assembly, disposed on the guide shell (9), is used to correct softening and sagging of the pipe material. The extrusion assembly includes: A hydraulic telescopic rod (1501) is fixedly connected to the guide shell (9), and the telescopic end of the hydraulic telescopic rod (1501) is fixedly connected to the fixed shell (1105); The number of sealing rings (1502) is the same as the number of the n-shaped frame (7), and they are all fixed to the collar (601). The n-shaped frame (7) is slidably connected to the adjacent sealing ring (1502). The rotating rod (6) has a blind hole. The fixed part of the hydraulic telescopic rod (1501) is connected to the blind hole of the rotating rod (6) through a pipe. The collar (601) has an oil guide hole with the same number as the n-shaped frame (7). The sealing ring (1502) is connected to the oil guide hole of the collar (601).

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