A plastic melting device for processing plastic-lined metal pipes

Abstract

The invention provides a plastic melting device for processing a plastic-lined metal pipe, relates to the technical field of plastic-lined metal pipe processing, and comprises: a plastic particle storage component; the plastic particle heating component is installed on the plastic particle storage component; the protective component is installed on the front side of the plastic particle storage component; the control component is installed on the protective component; the reminder component is installed on the bottom of the plastic particle heating component; the conical heating cover is fixedly installed on the output shafts of two electric cylinders, and the outer wall of the conical heating cover contacts the inner wall of a plastic particle storage barrel; the conical heating cover is provided with three circles of discharge holes; the invention has a blocking effect on unmelted plastic, the contact area between the plastic in the three circles of discharge holes and the conical heating cover is larger, and the melting effect of the plastic particles is ensured; and the problem that the unmelted plastic particles are easily wrapped in the inside of the molten plastic, affecting the melting effect of the plastic particles is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic-lined metal pipe processing, and more specifically, particularly relates to a plastic melting device for plastic-lined metal pipe processing. Background Art

[0002] The plastic-lined metal pipe is based on ordinary carbon steel pipe, lined with thermoplastic plastics with excellent chemical properties, and is formed by cold-drawn compounding or rotational molding. It has both the mechanical properties of steel pipe and the corrosion resistance of plastic pipe. The plastic in the plastic-lined metal pipe needs to be melted by a plastic melting device.

[0003] The plastic melting devices currently used still have the following problems:

[0004] 1. Incompletely melted plastic particles are easily wrapped inside the melted plastic, affecting the melting effect of the plastic particles;

[0005] 2. Although some melting devices are equipped with protective structures to prevent workers from getting burned, the protective structures are prone to poor utilization;

[0006] 3. After the plastic particles are melted, the power cannot be automatically cut off, which increases the power loss. In addition, after the plastic particles are melted, the reminder cannot be automatically issued, which increases the downtime. Summary of the invention

[0007] The disclosed embodiment relates to a plastic melting device for processing plastic-lined metal pipes, which comprises a plastic particle storage component, a plastic particle heating component, a protective component, a control component and a reminder component; the device has a blocking effect on unmelted plastic, and the contact area between the plastic in the three-circle discharge hole and the conical heating cover is larger, thereby ensuring the melting effect of the plastic particles; when the circular movable rod is separated from the arc-shaped pushing plate, the reset spring can drive the rectangular storage plate to move, thereby storing the start switch A, thereby preventing the protective bracket from forgetting to reset after moving; when the plastic particle storage barrel presses the switch B to close, the electric heating wires in the conical heating cover and the three-circle circular heating rod stop working, thereby reducing power loss.

[0008] In a first aspect of the present disclosure, a plastic melting device for processing a plastic-lined metal pipe is provided, which specifically comprises a plastic particle storage component, a plastic particle heating component, a protection component, a control component and a reminder component; the plastic particle heating component is installed on the plastic particle storage component; the protection component is installed on the front side of the plastic particle storage component, and the protection component is used to protect the staff;

[0009] The control component is installed on the protection component, and the control component is used to start the plastic particle heating component; the reminder component is installed at the bottom of the plastic particle heating component, and the reminder component is used to remind the staff that the plastic heating is completed, and the reminder component is also used to shut down the plastic particle heating component;

[0010] The plastic particle storage assembly comprises: a support base and a plastic particle storage barrel; a bolt connection hole is opened at a corner of the support base; and the plastic particle storage barrel is fixedly installed on the top of the support base;

[0011] The plastic pellet heating assembly comprises: an electric cylinder and a conical heating cover; there are two electric cylinders in total, and the two electric cylinders are fixedly mounted on the plastic pellet storage barrel; the conical heating cover is fixedly mounted on the output shafts of the two electric cylinders, and the outer wall of the conical heating cover contacts the inner wall of the plastic pellet storage barrel; the conical heating cover is provided with three circles of discharge holes, and an electric heating wire is arranged inside the conical heating cover;

[0012] The protection assembly comprises: an arc-shaped guide rail, a connecting slider, a circular connecting column and a protection bracket; the arc-shaped guide rails are provided with two in total, and the two arc-shaped guide rails are fixedly installed on the front side of the plastic particle storage barrel; the connecting sliders are provided with two in total, and the two connecting sliders are slidably installed on the two arc-shaped guide rails; the circular connecting columns are provided with two in total, and the two circular connecting columns are fixedly installed on the front sides of the two connecting sliders; the protection bracket is fixedly installed on the front sides of the two circular connecting columns;

[0013] The control assembly comprises: a circular movable rod and a rectangular receiving plate; the circular movable rod is slidably mounted on the protective bracket; the rectangular receiving plate is slidably mounted on the protective bracket, and the rear side of the rectangular receiving plate is fixedly connected to the front side of the circular movable rod;

[0014] The reminder component includes: a mounting bracket, a battery and an alarm; the mounting bracket is fixedly mounted on the bottom of the conical heating cover; the battery is fixedly mounted on the bottom of the mounting bracket; the alarm is fixedly mounted on the bottom of the mounting bracket, and the alarm is electrically connected to the battery.

[0015] In at least some embodiments, the plastic particle storage assembly also includes: a sealing top cover and an arc-shaped push plate; the sealing top cover is threadedly connected to the top of the plastic particle storage barrel; the arc-shaped push plate is fixedly installed on the front side of the plastic particle storage barrel, and a positioning groove is provided on the front side of the arc-shaped push plate.

[0016] In at least some embodiments, the plastic particle heating assembly also includes: a circular heating rod; the circular heating rod is provided with three circles, and the three circles of circular heating rods are fixedly installed on the top of the conical heating cover; the tops of the three circles of circular heating rods penetrate the plastic particle storage barrel, and the interior of the three circles of circular heating rods is provided with electric heating wires.

[0017] In at least some embodiments, the protection component also includes: a limit baffle and a protection net; there are four limit baffles, which are fixedly installed at both ends of the two arc guide rails; there are six protection nets, which are fixedly installed on the protection bracket.

[0018] In at least some embodiments, the control component also includes: a starting switch A; the circular movable rod is slidably mounted on the protective bracket, and the rear end of the circular movable rod is a hemispherical structure, and the rear end of the circular movable rod is inserted into the positioning groove; the starting switch A is fixedly mounted inside the rectangular storage plate, and the starting switch A is electrically connected to the conical heating cover and the electric heating wires in the three-circle circular heating rod. When the staff presses the starting switch A, the conical heating cover and the electric heating wires in the three-circle circular heating rod work.

[0019] In at least some embodiments, the control assembly further includes: a reset ring and a reset spring; the reset ring is fixedly mounted on the outside of the circular movable rod; the reset spring is mounted on the outside of the circular movable rod, and the reset spring is located between the protective bracket and the reset ring.

[0020] In at least some embodiments, the reminder component also includes: an off switch B and a reminder switch C; the off switch B is fixedly mounted on the mounting bracket, and the off switch B is electrically connected to the conical heating cover and the electric heating wires in the three-circle circular heating rod. When the plastic particle storage barrel presses the off switch B, the conical heating cover and the electric heating wires in the three-circle circular heating rod stop working; the reminder switch C is fixedly mounted on the mounting bracket, and the reminder switch C is electrically connected to the battery and the alarm. When the plastic particle storage barrel is in contact with the mounting bracket, the alarm works, and when the plastic particle storage barrel is separated from the mounting bracket, the alarm stops working.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the present invention, when the conical heating cover and the electric heating wires in the three-circle circular heating rod are working, the plastic particles in the plastic particle storage barrel are slowly melted; when the output shafts of the two electric cylinders are contracted, the conical heating cover squeezes the molten plastic in the plastic particle storage barrel, so that the molten plastic in the plastic particle storage barrel is discharged through the three-circle discharge circular holes. The arrangement of the three-circle discharge circular holes, on the one hand, has a blocking effect on the unmelted plastic, and on the other hand, the contact area between the plastic in the three-circle discharge circular holes and the conical heating cover is larger, thereby ensuring the melting effect of the plastic particles.

[0023] 2. The present invention has a protective effect on the staff and avoids scalding of the staff; when adding plastic particles, the staff can rotate the protective bracket to the right to facilitate the addition of plastic particles; when the circular movable rod is separated from the arc-shaped pushing plate, the reset spring can drive the rectangular storage plate to move, and has a storage effect on the start switch A, avoiding the protective bracket from being forgotten to reset after moving; when the protective bracket is reset, the arc-shaped pushing plate can push the circular movable rod to move, so that the start switch A is moved out, which is convenient for the staff to press.

[0024] 3. In the present invention, when the switch B of the plastic particle storage barrel is pressed to close, the electric heating wires in the conical heating cover and the three-circle circular heating rod stop working, thereby reducing power loss; when the plastic particle storage barrel contacts the mounting bracket, the alarm starts working, so that the staff can know that the molten plastic has been completely discharged, and the staff can add the plastic to be melted at the first time, thereby reducing the downtime of the device; when the plastic particle storage barrel is separated from the mounting bracket, the alarm stops working. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0026] The drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0027] In the attached picture:

[0028] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0029] Figure 2 It is a structural schematic diagram of the plastic particle storage component and the plastic particle heating component of the present invention.

[0030] Figure 3 The present invention Figure 2 Schematic diagram of the local enlarged structure of area A in the middle.

[0031] Figure 4 It is a schematic diagram of the structure of the protection component of the present invention.

[0032] Figure 5 The present invention Figure 1 Schematic diagram of the central cut structure.

[0033] Figure 6 The present invention Figure 5 Schematic diagram of the local enlarged structure of area B in the middle.

[0034] Figure 7 The present invention Figure 1 Schematic diagram of the bottom perspective structure.

[0035] Figure 8It is a structural schematic diagram of the reminder component of the present invention.

[0036] List of reference numerals:

[0037] 1. Plastic granule storage assembly; 101. Support base; 102. Plastic granule storage barrel; 103. Sealing top cover; 104. Arc-shaped push plate; 1041. Positioning groove;

[0038] 2. Plastic granule heating assembly; 201. Electric cylinder; 202. Conical heating cover; 2021. Discharge circular hole; 203. Round heating rod;

[0039] 3. Protection assembly; 301. Arc guide rail; 302. Limit baffle; 303. Connecting slider; 304. Circular connecting column; 305. Protection bracket; 306. Protection net;

[0040] 4. Control assembly; 401. Circular movable rod; 402. Rectangular storage plate; 403. Start switch A; 404. Reset ring; 405. Reset spring;

[0041] 5. Reminder component; 501. Mounting bracket; 502. Battery; 503. Alarm; 504. Shutoff switch B; 505. Reminder switch C. DETAILED DESCRIPTION

[0042] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0043] Example: Please refer to Figures 1 to 8 As shown: The present invention provides a plastic melting device for processing plastic-lined metal pipes, comprising a plastic particle storage component 1, a plastic particle heating component 2, a protection component 3, a control component 4 and a reminder component 5; the plastic particle heating component 2 is installed on the plastic particle storage component 1; the protection component 3 is installed on the front side of the plastic particle storage component 1, and the protection component 3 is used to protect the staff;

[0044] The control component 4 is installed on the protection component 3, and the control component 4 is used to start the plastic particle heating component 2; the reminder component 5 is installed at the bottom of the plastic particle heating component 2, and the reminder component 5 is used to remind the staff that the plastic heating is completed. The reminder component 5 is also used to shut down the plastic particle heating component 2.

[0045] In the present disclosure, Figure 2 and Figure 3As shown, the plastic particle storage assembly 1 includes: a support base 101 and a plastic particle storage barrel 102; a bolt connection hole is opened at the corner of the support base 101; the plastic particle storage barrel 102 is fixedly installed on the top of the support base 101; the plastic particle storage assembly 1 also includes: a sealing top cover 103 and an arc-shaped push plate 104; the sealing top cover 103 is threadedly connected to the top of the plastic particle storage barrel 102; the arc-shaped push plate 104 is fixedly installed on the front side of the plastic particle storage barrel 102, and a positioning groove 1041 is opened on the front side of the arc-shaped push plate 104;

[0046] The plastic pellet heating assembly 2 comprises: an electric cylinder 201, a conical heating cover 202 and a circular heating rod 203; there are two electric cylinders 201, and the two electric cylinders 201 are fixedly mounted on the plastic pellet storage barrel 102; the conical heating cover 202 is fixedly mounted on the output shafts of the two electric cylinders 201, and the outer wall of the conical heating cover 202 is in contact with the inner wall of the plastic pellet storage barrel 102; three circles of discharge holes 2021 are provided on the conical heating cover 202, and an electric heating wire is arranged inside the conical heating cover 202; there are three circles of circular heating rods 203, and the three circles of circular heating rods 203 are fixedly mounted on the top of the conical heating cover 202; the top of the three circles of circular heating rods 203 penetrates the plastic pellet storage barrel 102, and the three circles of circular heating rods 203 are arranged inside the electric heating wire;

[0047] The specific function is as follows: because the conical heating cover 202 is provided with an electric heating wire inside, and the three-circle circular heating rod 203 is provided with an electric heating wire inside, when the electric heating wires in the conical heating cover 202 and the three-circle circular heating rod 203 are working, the plastic particles in the plastic particle storage barrel 102 are slowly melted, and because the conical heating cover 202 is fixedly mounted on the output shafts of the two electric cylinders 201, and the outer wall of the conical heating cover 202 is in contact with the inner wall of the plastic particle storage barrel 102, and the conical heating cover 202 is provided with three When the output shafts of the two electric cylinders 201 contract, the conical heating cover 202 squeezes the molten plastic in the plastic particle storage barrel 102, so that the molten plastic in the plastic particle storage barrel 102 is discharged through the three circles of discharge holes 2021. The setting of the three circles of discharge holes 2021, on the one hand, blocks the unmelted plastic, and on the other hand, the contact area between the plastic in the three circles of discharge holes 2021 and the conical heating cover 202 is larger, thereby ensuring the melting effect of the plastic particles.

[0048] In the present disclosure, Figure 4 and Figure 6As shown, the protection component 3 includes: an arc guide rail 301 and a limit baffle 302; there are two arc guide rails 301, and the two arc guide rails 301 are fixedly installed on the front side of the plastic particle storage barrel 102; there are four limit baffles 302, and the four limit baffles 302 are fixedly installed at both ends of the two arc guide rails 301; the protection component 3 also includes: a connecting slider 303 and a circular connecting column 304; there are two connecting sliders 303, and the two connecting sliders 303 are slidably installed on the two arc guide rails 301; there are two circular connecting columns 304, and the two circular connecting columns 304 are fixedly installed on the front side of the two connecting sliders 303; the protection component 3 also includes: a protection bracket 305 and a protection net 306; the protection bracket 305 is fixedly installed on the front side of the two circular connecting columns 304; there are six protection nets 306, and the six protection nets 306 are fixedly installed on the protection bracket 305;

[0049] The control assembly 4 includes: a circular movable rod 401, a rectangular storage plate 402 and a start switch A403; the circular movable rod 401 is slidably mounted on the protective bracket 305, and the rear end of the circular movable rod 401 is a hemispherical structure, and the rear end of the circular movable rod 401 is inserted into the positioning groove 1041; the rectangular storage plate 402 is slidably mounted on the protective bracket 305, and the rear side of the rectangular storage plate 402 is fixedly connected to the front side of the circular movable rod 401; the start switch A403 is fixedly mounted inside the rectangular storage plate 402, and ... The switch A403 is electrically connected to the electric heating wires in the conical heating cover 202 and the three-circle circular heating rod 203. When the staff presses the start switch A403, the electric heating wires in the conical heating cover 202 and the three-circle circular heating rod 203 start working; the control component 4 also includes: a reset ring 404 and a reset spring 405; the reset ring 404 is fixedly mounted on the outside of the circular movable rod 401; the reset spring 405 is mounted on the outside of the circular movable rod 401, and the reset spring 405 is located between the protective bracket 305 and the reset ring 404;

[0050] Its specific functions are as follows: because the protective bracket 305 is fixedly mounted on the front side of the two circular connecting columns 304, and the six protective nets 306 are fixedly mounted on the protective bracket 305, it plays a protective role for the staff and prevents the staff from being scalded; when adding plastic particles, the staff can rotate the protective bracket 305 to the right to facilitate the addition of plastic particles, and because the circular movable rod 401 is slidably mounted on the protective bracket 305, and the starting switch A403 is fixedly mounted inside the rectangular storage plate 402, and the reset spring 405 is located between the protective bracket 305 and the reset ring 404, when the circular movable rod 401 is separated from the arc-shaped pushing plate 104, the reset spring 405 can drive the rectangular storage plate 402 to move, and play a storage role for the starting switch A403, preventing the protective bracket 305 from forgetting to reset after moving; when the protective bracket 305 is reset, the arc-shaped pushing plate 104 can push the circular movable rod 401 to move, so that the starting switch A403 is moved out, which is convenient for the staff to press.

[0051] In the present disclosure, Figure 8 As shown, the reminder component 5 includes: a mounting bracket 501, a battery 502 and an alarm 503; the mounting bracket 501 is fixedly mounted on the bottom of the conical heating cover 202; the battery 502 is fixedly mounted on the bottom of the mounting bracket 501; the alarm 503 is fixedly mounted on the bottom of the mounting bracket 501, and the alarm 503 is electrically connected to the battery 502; the reminder component 5 also includes: a shutoff switch B504 and a reminder switch C505; the shutoff switch B504 is fixedly mounted on the mounting bracket 501, and the shutoff switch B504 is connected to the conical heating cover 202 and the three The electric heating wires in the three-circle circular heating rod 203 are electrically connected. When the plastic pellet storage barrel 102 presses the off switch B504, the electric heating wires in the conical heating cover 202 and the three-circle circular heating rod 203 stop working; the reminder switch C505 is fixedly installed on the mounting bracket 501, and the reminder switch C505 is electrically connected to the battery 502 and the alarm 503. When the plastic pellet storage barrel 102 contacts the mounting bracket 501, the alarm 503 works, and when the plastic pellet storage barrel 102 separates from the mounting bracket 501, the alarm 503 stops working;

[0052] Its specific function is as follows: since the closing switch B504 is fixedly mounted on the mounting bracket 501, and the closing switch B504 is electrically connected to the electric heating wires in the conical heating cover 202 and the three-circle circular heating rod 203, when the plastic particle storage barrel 102 presses the closing switch B504, the electric heating wires in the conical heating cover 202 and the three-circle circular heating rod 203 stop working, thereby reducing power loss; and since the reminder switch C505 is fixedly mounted on the mounting bracket 501, and the reminder switch C505 is electrically connected to the battery 502 and the alarm 503, when the plastic particle storage barrel 102 contacts the mounting bracket 501, the alarm 503 works, thereby making it convenient for the staff to know that the melted plastic has been completely discharged, thereby making it convenient for the staff to add the plastic to be melted as soon as possible, thereby reducing the downtime of the device; and when the plastic particle storage barrel 102 is separated from the mounting bracket 501, the alarm 503 stops working.

[0053] The specific usage and function of this embodiment are as follows:

[0054] When the present invention is used, the staff first pours the plastic particles into the plastic particle storage barrel 102, and then the sealing top cover 103 is threadedly connected to the top of the plastic particle storage barrel 102, and then the staff rotates the protective bracket 305 to the left, so that the protective bracket 305 is located at the front side of the plastic particle storage barrel 102, which plays a protective role for the staff and avoids scalding. When the circular movable rod 401 is separated from the arc-shaped pushing plate 104, the reset spring 405 can drive the rectangular storage plate 402 to move, and plays a storage role for the starting switch A403, so as to avoid forgetting to reset the protective bracket 305 after moving; then press the starting switch A403, at this time, the conical heating cover 202 and the electric heating wires in the three-circle circular heating rod 203 work, and the plastic particles in the plastic particle storage barrel 102 slowly melt. After the electric heating wires in the conical heating cover 202 and the three-circle circular heating rod 203 work for a certain period of time, the output shafts of the two electric cylinders 201 slowly shrink. When the two electric cylinders 201 When the output shaft of the plastic pellet storage barrel 102 contracts, the conical heating cover 202 squeezes the molten plastic in the plastic pellet storage barrel 102, so that the molten plastic in the plastic pellet storage barrel 102 is discharged through the three-circle discharge circular hole 2021. The setting of the three-circle discharge circular hole 2021, on the one hand, blocks the unmelted plastic, and on the other hand, the contact area between the plastic in the three-circle discharge circular hole 2021 and the conical heating cover 202 is larger, ensuring the melting effect of the plastic pellets; when the plastic pellet storage barrel 102 presses the off switch B504, the electric heating wires in the conical heating cover 202 and the three-circle circular heating rod 203 stop working, reducing the power loss; when the plastic pellet storage barrel 102 contacts the mounting bracket 501, the alarm 503 works, so that the staff can know that the molten plastic has been completely discharged, so that the staff can add the plastic to be melted at the first time, reducing the downtime of the device; when the plastic pellet storage barrel 102 is separated from the mounting bracket 501, the alarm 503 stops working.

[0055] In this article, there are a few points to note:

[0056] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0057] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0058] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A plastic melting device for processing a plastic-lined metal pipe, comprising a plastic particle storage component (1), a plastic particle heating component (2), a protection component (3), a control component (4) and a reminder component (5); characterized in that: The plastic particle heating component (2) is mounted on the plastic particle storage component (1); the protective component (3) is mounted on the front side of the plastic particle storage component (1), and the protective component (3) is used to protect the staff; The control component (4) is mounted on the protection component (3), and the control component (4) is used to start the plastic particle heating component (2); the reminder component (5) is mounted on the bottom of the plastic particle heating component (2), and the reminder component (5) is used to remind the staff that the plastic heating is completed, and the reminder component (5) is also used to shut down the plastic particle heating component (2); The plastic pellet storage assembly (1) comprises: a support base (101) and a plastic pellet storage barrel (102); a bolt connection hole is provided at a corner of the support base (101); the plastic pellet storage barrel (102) is fixedly mounted on the top of the support base (101); the plastic pellet storage assembly (1) further comprises: a sealing top cover (103) and an arc-shaped push plate (104); the sealing top cover (103) is threadedly connected to the top of the plastic pellet storage barrel (102); the arc-shaped push plate (104) is fixedly mounted on the front side of the plastic pellet storage barrel (102), and a positioning groove (1041) is provided on the front side of the arc-shaped push plate (104); The plastic particle heating assembly (2) comprises: an electric cylinder (201) and a conical heating cover (202); two electric cylinders (201) are provided, and the two electric cylinders (201) are fixedly mounted on the plastic particle storage barrel (102); the conical heating cover (202) is fixedly mounted on the output shafts of the two electric cylinders (201), and the outer wall of the conical heating cover (202) is in contact with the inner wall of the plastic particle storage barrel (102); the conical heating cover (202) is provided with three circles The conical heating cover (2021) is provided with a discharge circular hole, and an electric heating wire is arranged inside the conical heating cover (202); the plastic particle heating component (2) further comprises: a circular heating rod (203); the circular heating rod (203) is provided with three circles in total, and the three circles of circular heating rods (203) are fixedly installed on the top of the conical heating cover (202); the tops of the three circles of circular heating rods (203) penetrate the plastic particle storage barrel (102), and the three circles of circular heating rods (203) are provided with an electric heating wire inside; The protection assembly (3) comprises: an arc-shaped guide rail (301), a connecting slider (303), a circular connecting column (304) and a protection bracket (305); two arc-shaped guide rails (301) are provided, and the two arc-shaped guide rails (301) are fixedly installed on the front side of the plastic particle storage barrel (102); two connecting sliders (303) are provided, and the two connecting sliders (303) are slidably installed on the two arc-shaped guide rails (301); two circular connecting columns (304) are provided, and the two circular connecting columns (304) are fixedly installed on the front sides of the two connecting sliders (303); the protection bracket (305) is fixedly installed on the front sides of the two circular connecting columns (304); The control assembly (4) comprises: a circular movable rod (401) and a rectangular storage plate (402); the circular movable rod (401) is slidably mounted on the protective bracket (305); the rectangular storage plate (402) is slidably mounted on the protective bracket (305), and the rear side of the rectangular storage plate (402) is fixedly connected to the front side of the circular movable rod (401); the control assembly (4) further comprises: a start switch A (403); the rear end of the circular movable rod (401) is a hemispherical structure, and the rear end of the circular movable rod (401) is inserted into the positioning groove (1041); the start switch A (403) is fixedly mounted on the rectangular storage plate (402). and the starting switch A (403) is electrically connected to the electric heating wires in the conical heating cover (202) and the three-circle circular heating rod (203); when the staff presses the starting switch A (403), the electric heating wires in the conical heating cover (202) and the three-circle circular heating rod (203) start to work; the control component (4) further comprises: a reset ring (404) and a reset spring (405); the reset ring (404) is fixedly mounted on the outside of the circular movable rod (401); the reset spring (405) is mounted on the outside of the circular movable rod (401), and the reset spring (405) is located between the protective bracket (305) and the reset ring (404); The reminder component (5) comprises: a mounting bracket (501), a battery (502) and an alarm (503); the mounting bracket (501) is fixedly mounted on the bottom of the conical heating cover (202); the battery (502) is fixedly mounted on the bottom of the mounting bracket (501); the alarm (503) is fixedly mounted on the bottom of the mounting bracket (501), and the alarm (503) is electrically connected to the battery (502); the reminder component (5) further comprises: an off switch B (504) and a reminder switch C (505); the off switch B (504) is fixedly mounted on the mounting bracket (501), and the off switch B (504) is electrically connected to the conical heating cover (202) and the electric heating wire in the three-circle circular heating rod (203) are electrically connected. When the plastic particle storage barrel (102) presses the off switch B (504), the electric heating wire in the conical heating cover (202) and the three-circle circular heating rod (203) stops working; the reminder switch C (505) is fixedly mounted on the mounting bracket (501), and the reminder switch C (505) is electrically connected to the battery (502) and the alarm (503). When the plastic particle storage barrel (102) contacts the mounting bracket (501), the alarm (503) works, and when the plastic particle storage barrel (102) is separated from the mounting bracket (501), the alarm (503) stops working; When adding plastic particles, the staff rotates the protective bracket (305) to the right to facilitate the addition of plastic particles; when the circular movable rod (401) is separated from the arc-shaped push plate (104), the reset spring (405) can drive the rectangular storage plate (402) to move, thereby storing the start switch A (403) and preventing the protective bracket (305) from being forgotten to be reset after being moved; when the protective bracket (305) is reset, the arc-shaped push plate (104) can push the circular movable rod (401) to move, thereby moving the start switch A (403) out.

2. A plastic melting device for processing plastic-lined metal pipes according to claim 1, characterized in that: The protection assembly (3) further comprises: a limit baffle (302) and a protection net (306); there are four limit baffles (302) in total, and the four limit baffles (302) are fixedly mounted at both ends of the two arc-shaped guide rails (301); there are six protection nets (306) in total, and the six protection nets (306) are fixedly mounted on the protection bracket (305).

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