A plastic alloy pipe hot melt connection device

Abstract

This invention discloses a plastic alloy pipe hot-melt connection device, including a frame, a hot-melt mechanism, a pipe diameter adjustment mechanism, an internal extrusion mechanism, and an adjustment drive mechanism. A shield is installed on the top of the frame. The hot-melt mechanism includes a heat insulation cover installed on the top of the frame, with an electric heating tube installed inside the heat insulation cover. An inlet is embedded on one side of the heat insulation cover. In use, the ends of two plastic alloy pipes to be hot-melted are inserted into the electric heating tube through the inlet on one side of the heat insulation cover. The electric heating tube heats and melts the plastic alloy pipes. Before the plastic alloy pipes melt and deform, the operator rotates the internal threaded ring in the pipe diameter adjustment mechanism to cause four symmetrically arranged conical plates to contract or expand relative to each other, thereby changing the inner diameter of the annular opening between the four conical plates to adapt to the hot-melt connection pipe diameters of different plastic alloy pipes, thus achieving pipe diameter adjustment.

Description

Technical Field

[0001] This invention relates to the field of plastic pipe technology, and more specifically, to a plastic alloy pipe hot-melt connection device. Background Technology

[0002] Plastic alloy pipes are made of polyvinyl chloride as the main raw material, through a process of partial kneading and overall kneading, and then through interpenetrating network alloying treatment. These pipes not only have the characteristics of light weight and long service life of plastic materials, but also the characteristics of high strength, hardness and high compressive strength of alloy materials.

[0003] However, existing hot-melt connection technology for plastic alloy pipes still has certain problems. When connecting existing plastic alloy pipes, the hot-melt connection equipment often heats one end of the pipe to soften it with an electric heating cylinder. During the softening stage, the outer diameter is manually reduced or expanded before being quickly connected to the port of another pipe. The surface shape of the pipe softened by this method is still cylindrical. When the two pipes are connected, the connection is not strong enough, which can cause rotation or separation, leading to connection failure. At the same time, existing hot-melt equipment usually softens the entire pipe. After softening, the internal shape of the pipe is easily deformed and bent under the influence of external force or its own weight, resulting in poor overall consistency of the plastic alloy pipe after hot-melt connection. Summary of the Invention

[0004] The purpose of this invention is to provide a plastic alloy pipe hot-melt connection device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a plastic alloy pipe hot-melt connection device, comprising a frame, a hot-melt mechanism, a pipe diameter adjustment mechanism, an internal extrusion mechanism, and an adjustment drive mechanism; wherein, a shield is installed on the top of the frame; the hot-melt mechanism includes a heat insulation cover, which is installed on the top of the frame, and an electric heating tube is installed inside the heat insulation cover; an inlet is embedded on one side of the heat insulation cover, and rectangular openings are provided on both sides of the heat insulation cover; the pipe diameter adjustment mechanism includes four conical plates and an internally threaded ring, each of the conical plates... All plates are arc-shaped. One end of each of the four conical plates is symmetrically and fixedly connected to the inner wall of the heat insulation cover, forming a conical cylinder. The outer wall of each conical plate is provided with a threaded groove. The internal threaded ring is threadedly connected to the threaded groove of the conical plate, and the outer wall of the internal threaded ring is provided with a toothed groove. The tube extrusion mechanism is installed inside the tube diameter adjustment mechanism. The tube extrusion mechanism is used to extrude and shape the inside of the plastic alloy tube. The adjustment drive mechanism is installed inside the cover. The adjustment drive mechanism is used to drive the internal threaded ring to rotate.

[0006] Preferably, the pipe diameter adjustment mechanism further includes four guide rollers, and two fixing blocks are symmetrically installed on the inner walls of the four tapered plates. The guide rollers are rotatably installed on opposite sides of the two fixing blocks.

[0007] Preferably, the in-tube extrusion mechanism includes a fixed tube, one end of which is threaded to the inner wall of the heat insulation cover, and the fixed tube is located inside the four conical plates. Four grooves are symmetrically arranged on the outside of the fixed tube, and multiple airbags are slidably installed on the grooves. The airbags are fixedly connected to the grooves by bolts. An air pump is installed inside the cover, and the air outlet of the air pump is connected to the inside of the fixed tube through a pipe body. Multiple corrugated hoses are connected to the outer wall of the air outlet pipe of the air pump, and one end of the corrugated hose is connected to the inside of the airbag.

[0008] Preferably, the adjustment drive mechanism includes a servo motor, which is installed inside the cover. A toothed roller is installed on the outside of the cover via a rotating shaft. The rotating shaft of the servo motor passes through the cover, and gears are fixedly connected to both the rotating shaft of the servo motor and the outside of the toothed roller. The two gears mesh with each other, and the toothed roller meshes with the internal threaded ring.

[0009] Preferably, a pressure monitoring mechanism is installed on one side of the shield. The pressure monitoring mechanism includes a DSP controller, which is signal-connected to an A / D converter. The signal input terminal of the A / D converter is connected to a pressure sensor via a wire.

[0010] Preferably, the air pressure sensor is disposed on the inner wall of the air outlet pipe of the air pump.

[0011] Preferably, a display screen is installed on one side of the shield, and the signal output terminal of the DSP controller is connected to the signal input terminal of the display screen.

[0012] Preferably, the control output terminal of the DSP controller is connected to the electrical control terminals of the servo motor and the air pump, respectively.

[0013] Preferably, a top shell is installed on one side of the shield, and the toothed roller and the gear are both located inside the top shell.

[0014] Preferably, the opening of the inlet is funnel-shaped.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. When using this invention, an electric heating tube is used to heat and melt the plastic alloy tube. The operator rotates the internal threaded ring in the tube diameter adjustment mechanism to make the four symmetrically arranged conical plates contract or expand with each other, thereby changing the inner diameter of the annular opening between the four conical plates to adapt to the hot-melt connection tube diameter of different plastic alloy tubes, thus achieving the tube diameter adjustment effect.

[0017] Second, this invention activates the servo motor in the adjustment drive mechanism to make two gears mesh and drive each other, driving the toothed roller to mesh with the tooth groove on the surface of the internal threaded ring. Under the forward or reverse rotation of the servo motor, the internal threaded ring can rotate automatically, realizing the automatic adjustment function of the pipe diameter adjustment mechanism, saving the manual adjustment steps and improving the adjustment efficiency.

[0018] Third, the present invention utilizes the rolling of the guide roller to deform the outer wall of the softened plastic alloy tube, forming a tube with a rectangular surface. When two plastic alloy tubes are heat-melted and shaped, the rectangular outer wall shape of the tube can increase the connection strength and avoid the rotation phenomenon that easily occurs when the port of a conventional cylindrical tube is connected.

[0019] Fourth, the fixing tube in this invention can be inserted into the tube body. By starting the air pump, the airbag gradually expands and adheres to the inner wall of the plastic alloy tube under the pressure of the gas, which plays a role in fitting and supporting. This improves the shape consistency of the plastic alloy tube after heat melting and softening. At the same time, the pressure value of the air pressure sensor can be used to monitor whether the airbag is inflated and expands, making it easy to determine whether the airbag is adhered to the inner wall of the tube body. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a plastic alloy pipe hot-melt connection device according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the heat insulation cover and top shell in the plastic alloy pipe hot-melt connection equipment according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the shield in the plastic alloy pipe hot-melt connection equipment according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the conical plate and toothed roller in a plastic alloy pipe hot-melt connection device according to an embodiment of the present invention;

[0024] Figure 5 In accordance with the present invention Figure 4 A magnified structural diagram of part B in the middle section;

[0025] Figure 6 This is a schematic cross-sectional view of the conical plate in the plastic alloy pipe hot-melt connection equipment according to an embodiment of the present invention;

[0026] Figure 7 This is a schematic cross-sectional view of the airbag and the fixing tube in the plastic alloy tube hot-melt connection device according to an embodiment of the present invention;

[0027] Figure 8 In accordance with the present invention Figure 1 A magnified structural diagram of part A in the middle.

[0028] In the diagram: 1. Frame; 2. Shield; 3. Hot melt mechanism; 31. Heat insulation cover; 32. Inlet pipe; 33. Electric heating tube; 4. Pipe diameter adjustment mechanism; 41. Conical plate; 42. Internal threaded ring; 43. Guide roller; 44. Fixing block; 5. In-pipe extrusion mechanism; 51. Air pump; 52. Airbag; 53. Fixing pipe; 54. Cable groove; 55. Air outlet; 56. First connecting rod; 57. Second connecting rod; 58. Air inlet; 6. Adjustment drive mechanism; 61. Top shell; 62. Gear; 63. Gear roller; 64. Servo motor; 7. Pressure monitoring mechanism; 71. Display screen; 72. DSP controller; 73. A / D converter; 74. Air pressure sensor. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "first," "second," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] Please see Figures 1-2 The present invention provides a plastic alloy pipe hot melt connection device, including: a frame 1, a hot melt mechanism 3, a pipe diameter adjustment mechanism 4, an in-pipe extrusion mechanism 5, and an adjustment drive mechanism 6.

[0032] A shield 2 is installed on the top of rack 1, such as Figures 1-3As shown, the heat-melting mechanism 3 includes a heat insulation cover 31, which is installed on the top of the frame 1. An electric heating tube 33 is installed inside the heat insulation cover 31. An inlet 32 ​​is embedded on one side of the heat insulation cover 31. Rectangular openings are provided on both sides of the heat insulation cover 31. In use, the ends of two plastic alloy tubes that need to be heat-melted are inserted into the electric heating tube 33 through the inlet 32 ​​on one side of the heat insulation cover 31, and the electric heating tube 33 is used to heat and melt the plastic alloy tubes.

[0033] Specifically, in order to facilitate the entry of the plastic alloy tube into the inlet 32, the opening of the inlet 32 ​​is funnel-shaped.

[0034] Among them, such as Figures 3-5 As shown, the pipe diameter adjustment mechanism 4 includes four conical plates 41 and an internal threaded ring 42. Each conical plate 41 is arc-shaped. One end of each of the four conical plates 41 is symmetrically fixed to the inner wall of the heat insulation cover 31 and is in the shape of a conical cylinder. The outer wall of the conical plate 41 is provided with a threaded groove. The internal threaded ring 42 is threadedly connected to the threaded groove of the conical plate 41. The outer wall of the internal threaded ring 42 is provided with a toothed groove. When the pipe diameter adjustment mechanism 4 is in use, before the plastic alloy pipe melts and deforms, the operator rotates the internal threaded ring 42 in the pipe diameter adjustment mechanism 4 to make the four symmetrically arranged conical plates 41 contract or expand with each other, thereby changing the inner diameter of the annular opening between the four conical plates 41 to adapt to the hot-melt connection pipe diameter of different plastic alloy pipes.

[0035] Furthermore, in combination Figure 3 and Figure 4 The pipe diameter adjustment mechanism 4 also includes four guide rollers 43. Two fixed blocks 44 are symmetrically installed on the inner walls of the four conical plates 41. The guide rollers 43 are rotatably installed on the opposite side of the two fixed blocks 44. When the plastic alloy pipe is heated and softened, it continuously pushes the pipe body inward, so that the outer wall of the pipe body contacts the guide rollers 43. The rolling of the guide rollers 43 causes the outer wall of the pipe body to deform, forming a pipe body with a rectangular surface. After the two plastic alloy pipes are heat-melted and shaped, the ends of the two pipe bodies are inserted together. The rectangular outer wall shape of the pipe body can increase the connection strength.

[0036] Specifically, after shaping the surfaces of the two plastic alloy tubes that need to be spliced, the pipe diameter adjustment mechanism 4 can calculate the angle using a pipe diameter measuring tool and adjust the connection angle of the two plastic alloy tubes to ensure the insertion of the two plastic alloy tubes. At the same time, it can also match the pipe diameters of the two plastic alloy tubes by changing the size of the annular opening of the conical plate 41.

[0037] It should be noted that the rectangular openings on both sides of the heat insulation cover 31 allow the outer part of the internal threaded ring 42 to be placed at the opening.

[0038] Among them, such as Figures 1-7As shown, the in-tube extrusion mechanism 5 includes a fixed tube 53, one end of which is threaded to the inner wall of the heat insulation cover 31. The fixed tube 53 is located inside four conical plates 41. Four wire grooves 54 are symmetrically arranged on the outside of the fixed tube 53. Multiple airbags 52 are slidably installed on the wire grooves 54, and the airbags 52 are fixedly connected to the wire grooves 54 by bolts. An air pump 51 is installed inside the cover 2. The air outlet of the air pump 51 is connected to the inside of the fixed tube 53 through a pipe body. Multiple corrugated hoses 55 are connected to the outer wall of the air outlet pipe of the air pump 51. One end of the corrugated hose 55 is connected to the inside of the airbag 52.

[0039] When hot-melting and shaping the plastic alloy tube, the fixed tube 53 in the tube extrusion mechanism 5 can be inserted into the tube body. By starting the air pump 51, gas is introduced into the fixed tube 53 and delivered to the airbag 52 in sequence through multiple corrugated hoses 55. The airbag 52 gradually expands under the pressure of the gas, so that the airbag 52 can fit and support the inner wall of the plastic alloy tube, improving the shape consistency of the plastic alloy tube after hot melting and softening. Before using the airbag 52, the operator can slide the position of the airbag 52 and fix it with bolts, so that the airbag 52 can be adapted and adjusted according to the plastic alloy tube of different lengths.

[0040] Among them, such as Figures 1-4 As shown, the adjustment drive mechanism 6 is installed inside the cover 2. The adjustment drive mechanism 6 includes a servo motor 64, which is installed inside the cover 2. A toothed roller 63 is installed on the outside of the cover 2 via a rotating shaft. The rotating shaft of the servo motor 64 passes through the cover 2, and gears 62 are fixedly connected to both the rotating shaft of the servo motor 64 and the outside of the toothed roller 63. The two gears 62 mesh with each other, and the toothed roller 63 meshes with the internal threaded ring 42. When the adjustment drive mechanism 6 is in use, the servo motor 64 is started to make the two gears 62 mesh with each other, driving the toothed roller 63 to mesh with the tooth grooves on the surface of the internal threaded ring 42. Under the forward or reverse rotation of the servo motor 64, the internal threaded ring 42 can rotate automatically, realizing the automatic adjustment function of the pipe diameter adjustment mechanism 4.

[0041] Specifically, in order to prevent the toothed roller 63 and gear 62 from being directly exposed to the outside, a top shell 61 is installed on one side of the cover 2, and the toothed roller 63 and gear 62 are both located inside the top shell 61.

[0042] like Figure 1 and Figure 7As shown, in order to monitor and control the air pressure of the airbag 52, a pressure monitoring mechanism 7 is installed on one side of the shield 2. The pressure monitoring mechanism 7 includes a DSP controller 72, which is connected to an A / D converter 73. The signal input terminal of the A / D converter 73 is connected to a pressure sensor 74 via a wire. The pressure sensor 74 is located on the inner wall of the air outlet pipe of the air pump 51. A display screen 71 is installed on one side of the shield 2. The signal output terminal of the DSP controller 72 is connected to the signal input terminal of the display screen 71. When the pressure monitoring mechanism 7 is in use, the pressure sensor 74 is used to monitor the pressure value of gas flowing into the airbag 52 through the air outlet pipe of the air pump 51, and converts the monitoring signal through the A / D converter 73 and displays it on the display screen 71. When the airbag 52 is attached to the inner wall of the plastic alloy tube, the air pressure value will increase, making it easier for the operator to observe whether the airbag 52 is attached to the inner wall of the plastic alloy tube.

[0043] It should be noted that the control output terminal of the DSP controller 72 is connected to the electrical control terminals of the servo motor 64 and the air pump 51 respectively. The DSP controller 72 can also control the operating status of the servo motor 64 and the air pump 51 respectively.

[0044] Based on the above technical solution, the working steps of this solution are summarized as follows: When using this invention, the ends of the two plastic alloy tubes that need to be heat-fused are introduced into the electric heating tube 33 through the inlet 32 ​​on one side of the heat insulation cover 31. The electric heating tube 33 heats and melts the plastic alloy tubes. Before the plastic alloy tubes melt and deform, the operator rotates the internal threaded ring 42 in the tube diameter adjustment mechanism 4 to make the four symmetrically arranged conical plates 41 contract or expand with each other, thereby changing the inner diameter of the annular opening between the four conical plates 41 to adapt to the heat-fused connection tube diameter of different plastic alloy tubes, thus achieving the tube diameter adjustment effect.

[0045] When the plastic alloy tube is heated and softened, it is continuously pushed inward, so that the outer wall of the tube contacts the guide roller 43. The rolling of the guide roller 43 causes the outer wall of the tube to deform, forming a tube with a rectangular surface. After the two plastic alloy tubes are melted and shaped, the ends of the two tubes are inserted together. The rectangular shape of the outer wall of the tube increases the connection strength and avoids the rotation phenomenon that easily occurs when the port of a conventional cylindrical tube is connected.

[0046] In this invention, when the plastic alloy tube body is hot-melted and shaped, the fixed tube 53 in the tube extrusion mechanism 5 can be inserted into the tube body. By starting the air pump 51, gas is introduced into the fixed tube 53, and gas is sequentially delivered to the airbag 52 through multiple corrugated hoses 55. The airbag 52 gradually expands under the pressure of the gas, so that the airbag 52 can fit and support the inner wall of the plastic alloy tube, improving the shape consistency of the plastic alloy tube after hot melting and softening. Before using the airbag 52, the operator can slide the position of the airbag 52 so that the airbag 52 can be adapted to plastic alloy tubes of different lengths.

[0047] In this invention, the pressure value monitored by the air pressure sensor 74 can detect whether the airbag 52 is attached to the inner wall of the tube. In order to reduce the step of manually adjusting the inner threaded ring 42, the servo motor 64 in the adjustment drive mechanism 6 is activated to make the two gears 62 mesh with each other and drive the toothed roller 63 to mesh with the tooth groove on the surface of the inner threaded ring 42. Under the forward or reverse rotation of the servo motor 64, the inner threaded ring 42 can be automatically rotated, realizing the automatic adjustment function of the pipe diameter adjustment mechanism 4, saving the step of manual adjustment and improving the adjustment efficiency.

[0048] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. It should be noted that implementations not illustrated or described in the drawings or the main text of the specification are forms known to those skilled in the art and are not described in detail. Furthermore, the definitions of the components described above are not limited to the various specific structures, shapes, or methods mentioned in the embodiments, and those skilled in the art can easily modify or substitute them.

Claims

1. A plastic alloy pipe hot-melt connection device, characterized in that, It includes a frame (1), a hot melt mechanism (3), a pipe diameter adjustment mechanism (4), an in-pipe extrusion mechanism (5), and an adjustment drive mechanism (6): The top of the frame (1) is equipped with a cover (2). The hot melt mechanism (3) includes a heat insulation cover (31), which is installed on the top of the frame (1). An electric heating tube (33) is installed inside the heat insulation cover (31). An inlet (32) is embedded on one side of the heat insulation cover (31), and rectangular openings are provided on both sides of the heat insulation cover (31). The pipe diameter adjustment mechanism (4) includes four conical plates (41) and an internal threaded ring (42). Each conical plate (41) is arc-shaped. One end of each of the four conical plates (41) is symmetrically fixed to the inner wall of the heat insulation cover (31) and is in the shape of a conical cylinder. The outer wall of the conical plate (41) is provided with a threaded groove. The internal threaded ring (42) is threaded to the threaded groove of the conical plate (41). The outer wall of the internal threaded ring (42) is provided with a toothed groove. The in-pipe extrusion mechanism (5) is installed inside the pipe diameter adjustment mechanism (4), and the in-pipe extrusion mechanism (5) is used to extrude and shape the inside of the plastic alloy pipe; The adjustment drive mechanism (6) is installed inside the shield (2), and the adjustment drive mechanism (6) is used to drive the internal threaded ring (42) to rotate; The pipe diameter adjustment mechanism (4) also includes four guide rollers (43), and two fixed blocks (44) are symmetrically installed on the inner walls of the four conical plates (41). The guide rollers (43) are rotatably installed on the opposite side of the two fixed blocks (44). The tube extrusion mechanism (5) includes a fixed tube (53), one end of which is threaded to the inner wall of the heat insulation cover (31), and the fixed tube (53) is located inside the four conical plates (41). Four wire grooves (54) are symmetrically arranged on the outside of the fixed tube (53). Multiple airbags (52) are slidably installed on the wire grooves (54), and the airbags (52) are fixedly connected to the wire grooves (54) by bolts. An air pump (51) is installed inside the cover (2). The air outlet of the air pump (51) is connected to the inside of the fixed tube (53) through the tube body, and multiple corrugated hoses (55) are connected to the outer wall of the air outlet tube of the air pump (51). One end of the corrugated hoses (55) is connected to the inside of the airbags (52). A pressure monitoring mechanism (7) is installed on one side of the shield (2). The pressure monitoring mechanism (7) includes a DSP controller (72). The DSP controller (72) is connected to an A / D converter (73). The signal input terminal of the A / D converter (73) is connected to a pressure sensor (74) via a wire.

2. The plastic alloy pipe hot-melt connection equipment according to claim 1, characterized in that: The adjustment drive mechanism (6) includes a servo motor (64), which is installed inside the cover (2). A toothed roller (63) is installed on the outside of the cover (2) via a rotating shaft. The rotating shaft of the servo motor (64) passes through the cover (2), and gears (62) are fixedly connected to both the rotating shaft of the servo motor (64) and the outside of the toothed roller (63). The two gears (62) mesh with each other, and the toothed roller (63) meshes with the internal threaded ring (42).

3. The plastic alloy pipe hot-melt connection equipment according to claim 1, characterized in that: The air pressure sensor (74) is disposed on the inner wall of the air outlet pipe of the air pump (51).

4. The plastic alloy pipe hot-melt connection equipment according to claim 1, characterized in that: A display screen (71) is installed on one side of the shield (2), and the signal output terminal of the DSP controller (72) is connected to the signal input terminal of the display screen (71).

5. The plastic alloy pipe hot-melt connection equipment according to claim 2, characterized in that: The control output terminal of the DSP controller (72) is connected to the electrical control terminal of the servo motor (64) and the air pump (51), respectively.

6. The plastic alloy pipe hot-melt connection equipment according to claim 2, characterized in that: A top shell (61) is installed on one side of the shield (2), and the toothed roller (63) and the gear (62) are both located inside the top shell (61).

7. The plastic alloy pipe hot-melt connection equipment according to claim 1, characterized in that: The opening of the inlet (32) is funnel-shaped.

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