A self-limiting temperature electric heating tube

Abstract

The present invention discloses a self-limiting temperature electric heating tube, comprising: an outer tube sleeve and a plastic lining, wherein a PTC conductive polymer is filled between the outer tube sleeve and the plastic lining. In the present application, the electric current is transferred to one of the embedded cables through a metal slide rail and a metal ball through a connector, and the current flows to another embedded cable through the PTC conductive polymer, and the PTC conductive polymer generates heat, and the heat is transferred to the fluid medium in the center of the tube through the plastic lining to increase its temperature. At this time, if the external thermostat is out of control or the temperature sensor fails, causing the PTC conductive polymer to be energized all the time, when the temperature rises to a certain temperature, the resistance of the PTC conductive polymer will become infinite, so that the current passing through becomes very small, preventing the temperature from rising, and the maximum temperature will not rise again after reaching a certain value, thereby avoiding the boiling of the medium due to excessive temperature or causing a fire, and the overall structure is simple, less maintenance, convenient construction, and good acid, alkali and heat resistance.

Description

Technical Field

[0001] The invention relates to the technical field of medium transportation, and in particular to a self-limiting temperature electric heating tube. Background Art

[0002] In industrial production and life, some media need to maintain a certain temperature during transportation. For example, high-concentration NaOH solution will crystallize if the temperature is too low, some glues will solidify at low temperatures, heavy oil will also become viscous at low temperatures, and water pipelines in the north are prone to ice in winter. When encountering these problems, the pipeline is usually wrapped with insulation cotton or wrapped with heating tape and then wrapped with insulation cotton. The construction is time-consuming and labor-intensive, and the heating is uneven and unsightly. Therefore, it is urgent to propose corresponding self-limiting temperature electric heating pipes to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to propose a self-limiting temperature electric heating tube in order to solve the above problems.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A self-limiting temperature electric heating tube, comprising:

[0006] The outer tube sleeve and the plastic inner liner are filled with PTC conductive polymer, the outer tube sleeve is provided with wrinkles, and the inner surface wall of the wrinkles is penetrated with an embedded cable;

[0007] A connecting seat is fixed on both sides of the outer pipe sleeve and the plastic liner, and a flange is fixedly installed on the side of the connecting seat away from the outer pipe sleeve;

[0008] The length of the embedded cable is greater than that of the outer sleeve, and the horizontal sides extend to the inner surface wall of the connection seat;

[0009] A matching portion for electrical matching between the external electrical component and the embedded cable is arranged between the open end of the embedded cable and the inner surface wall of the connecting seat.

[0010] Preferably, the mating part includes a ring sleeved on the outer wall of the connecting seat and a metal ball fixedly installed on the open end of the embedded cable, the inner wall of the connecting seat is fixedly installed with a metal slide rail, the outer wall of the metal ball is slidably connected to the inner wall of the metal slide rail, the outer wall of the ring is fixedly installed with an electrical connector that is conductive to the metal slide rail, and the outer wall of the ring is provided with a locking assembly for positioning the ring.

[0011] Preferably, a support ring is fixedly mounted on the outer surface wall of the outer sleeve, and the inner surface wall of the support ring is fixed to the outer surface wall of the corrugation at the same time.

[0012] Preferably, the plastic liner is provided with a plurality of sets of inward folds.

[0013] Preferably, a mounting seat is fixedly connected between the outer wall of the outer pipe sleeve and the inner wall of the plastic liner, and the mounting seat and the connecting seat are integrally formed.

[0014] Preferably, elastic cushion layers that fit the inner surface wall of the connecting seat are fixedly installed on both sides of the longitudinal end of the ring.

[0015] Preferably, the locking assembly comprises a fixing plate fixedly mounted on the outer wall of the collar, a fastening rod is screwedly connected to the inner wall of the fixing plate, and an open end of the fastening rod abuts against the outer wall of the arc-shaped end of the connecting seat.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] 1. In the present application, after the connector is connected to the electrical connector, the current is transferred to one of the embedded cables through the metal slide rail and the metal ball, and the current flows to the other embedded cable through the PTC conductive polymer. The PTC conductive polymer generates heat, and the heat is conducted to the fluid medium in the center of the tube through the plastic lining to increase its temperature. At this time, if the external thermostat is out of control or the temperature sensor fails, causing the PTC conductive polymer to be powered on all the time, when the temperature rises to a certain temperature, the resistance of the PTC conductive polymer will become infinite, making the current passing through very small, preventing the temperature from rising. After the maximum temperature reaches a certain value, it will not rise any further, thereby avoiding boiling of the medium due to excessive temperature or causing a fire. The overall structure is simple, maintenance is minimal, construction is convenient, and acid, alkali and heat resistance are good.

[0018] 2. In the present application, one end of the embedded cable is directly fixed to the connecting seat, but the metal ball can slide in a ring along the inner surface wall of the metal slide rail, which makes it possible to drive the metal slide rail to rotate axially through the collar until the electrical connector on the outside of the collar reaches the specified position, and then tighten the fastening rod connected to the inner surface wall of the fixing plate so that its open end is tightly attached to the outer surface wall of the arc-shaped end of the connecting seat, thereby completing the positioning of the collar and the electrical connector. In this way, the position of the electrical connector can be adjusted according to the requirements of subsequent connections without affecting the normal electrical connection, thereby improving the application range of the self-limiting temperature electric heating tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It shows a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of a cross-sectional structure of an electric heating tube provided in an embodiment of the present invention is shown;

[0021] Figure 3 A schematic diagram of the structure of a metal slide rail provided according to an embodiment of the present invention is shown;

[0022] Figure 4A schematic diagram of the structure of a metal ball provided according to an embodiment of the present invention is shown;

[0023] Figure 5 A schematic structural diagram of a connecting base and a mounting base provided according to an embodiment of the present invention is shown.

[0024] Legend:

[0025] 1. Outer tube sleeve; 2. Support ring; 3. Flange; 4. Embedded cable; 5. PTC conductive polymer; 6. Plastic lining; 7. Ring; 8. Fixing plate; 9. Electrical connector; 10. Connecting seat; 11. Metal slide rail; 12. Mounting seat; 13. Metal ball. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-5 , the present invention provides a technical solution:

[0028] A self-limiting temperature electric heating tube, comprising:

[0029] An outer tube sleeve 1 and a plastic liner 6, a PTC conductive polymer 5 is filled between the outer tube sleeve 1 and the plastic liner 6, the outer tube sleeve 1 is provided with wrinkles, and an embedded cable 4 is penetrated through the inner surface wall of the wrinkles;

[0030] The embedded cable 4 is a multi-strand silver-plated copper conductor (bare conductor) with good flexibility and oxidation resistance;

[0031] PTC conductive polymer 5 is a conductive plastic made of a conductive polymer composite material with PTC characteristics. When the ambient temperature rises, the resistance of the material will increase, thereby reducing or cutting off the current and reducing the power. When the ambient temperature drops, its PTC characteristics will increase the current, improve the heat output, and keep the temperature of the heated body constant. It is a thermal sensitive element with resistance and power characteristics, and has thermal switch characteristics. Different PTC materials can be selected according to the highest temperature;

[0032] The plastic lining 6 is PFA plastic, which is a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene and has good acid, alkali and heat resistance.

[0033] The outer tube sleeve 1 serves as a heat-insulating layer and can be made of a flexible material or a hard material, which determines whether the electric heating tube is a flexible tube or a hard tube.

[0034] A connecting seat 10 is fixed on both sides of the outer pipe sleeve 1 and the plastic liner 6, and a flange 3 is fixedly installed on one side of the connecting seat 10 away from the outer pipe sleeve 1;

[0035] The length of the embedded cable 4 is greater than that of the outer tube sleeve 1, and the horizontal sides extend to the inner surface wall of the connecting seat 10;

[0036] A matching portion for electrical matching between the external electrical component and the embedded cable 4 is provided between the open end of the embedded cable 4 and the inner surface wall of the connecting seat 10 .

[0037] The current is transferred to one group of embedded cables 4 through the metal slide rail 11 and the metal ball 13, and the current flows to another embedded cable 4 through the PTC conductive polymer 5. The PTC conductive polymer 5 generates heat, and the heat is conducted to the fluid medium in the center of the tube through the plastic lining 6 to increase its temperature. At this time, if the external thermostat is out of control or the temperature sensor fails, causing the PTC conductive polymer 5 to be powered on all the time, when the temperature rises to a certain temperature, the resistance of the PTC conductive polymer 5 will become infinite, making the current passing through very small, preventing the temperature from rising. After the maximum temperature reaches a certain value, it will not rise any further, thereby avoiding boiling of the medium due to excessive temperature or causing a fire. The overall structure is simple, maintenance is less, construction is convenient, and acid, alkali and heat resistance are good.

[0038] Specifically, Figure 1 and Figure 4 As shown, the mating part includes a ring 7 sleeved on the outer wall of the connecting seat 10 and a metal ball 13 fixedly installed on the open end of the embedded cable 4, the inner wall of the connecting seat 10 is fixedly installed with a metal slide rail 11, the outer wall of the metal ball 13 is slidably connected with the inner wall of the metal slide rail 11, the outer wall of the ring 7 is fixedly installed with an electrical connector 9 that is conductive to the metal slide rail 11, and the outer wall of the ring 7 is provided with a locking component for positioning the ring 7.

[0039] Elastic cushions are fixedly installed on both sides of the longitudinal end of the ring 7 and are in contact with the inner wall of the connecting seat 10 to ensure the air tightness and waterproof effect between the ring 7 and the connecting seat 10. The locking assembly includes a fixing plate 8 fixedly installed on the outer wall of the ring 7. A fastening rod is screwed on the inner wall of the fixing plate 8, and the open end of the fastening rod is in contact with the outer wall of the arc-shaped end of the connecting seat 10.

[0040] One end of the embedded cable 4 is directly fixed to the connecting seat 10, but the metal ball 13 can slide in a ring along the inner wall of the metal slide rail 11, which makes it possible to drive the metal slide rail 11 to rotate axially through the ring 7 until the electrical connector 9 on the outside of the ring 7 reaches the specified position, and then tighten the fastening rod connected to the inner wall of the fixing plate 8 so that its open end is tightly attached to the outer wall of the arc-shaped end of the connecting seat 10, thereby completing the positioning of the ring 7 and the electrical connector 9, so that the position of the electrical connector 9 can be adjusted according to the needs of subsequent connections without affecting the normal electrical connection.

[0041] Specifically, Figure 3 and Figure 4 As shown, a support ring 2 is fixedly installed on the outer wall of the outer tube sleeve 1, and the inner wall of the support ring 2 is fixed to the outer wall of the corrugation at the same time to ensure the stability of the position of the embedded cable 4 and avoid its displacement. The plastic liner 6 is provided with multiple groups of inward folds to increase the contact area between the PTC conductive polymer 5 and the fluid to achieve faster heat exchange efficiency. A mounting seat 12 is fixedly connected between the outer wall of the outer tube sleeve 1 and the inner wall of the plastic liner 6 at the same time. The mounting seat 12 and the connecting seat 10 are integrally formed to ensure the stability of the connection between the connecting seat 10 and the outer tube sleeve 1 and the plastic liner 6.

[0042] In summary, after the external connector provided in this embodiment is connected to the electrical connector 9, the current is transferred to one group of embedded cables 4 through the metal slide rail 11 and the metal ball 13, and the current flows to another embedded cable 4 through the PTC conductive polymer 5. The PTC conductive polymer 5 generates heat, and the heat is conducted to the fluid medium in the center of the tube through the plastic lining 6 to increase its temperature. At this time, if the external thermostat is out of control or the temperature sensor fails, causing the PTC conductive polymer 5 to be powered on all the time, when the temperature rises to a certain temperature, the resistance of the PTC conductive polymer 5 will become infinite, making the current passing through very small, preventing the temperature from rising. After the maximum temperature reaches a certain value, it will not rise any further, thereby avoiding boiling of the medium due to excessive temperature or causing a fire. The overall structure is simple, maintenance is less, construction is convenient, and acid, alkali and heat resistance are good.

[0043] One end of the embedded cable 4 is directly fixed to the connecting seat 10, but the metal ball 13 can slide in an annular manner along the inner surface wall of the metal slide rail 11, which makes it possible to drive the metal slide rail 11 to rotate axially through the ring 7 until the electrical connector 9 on the outside of the ring 7 reaches the specified position, and then tighten the fastening rod connected to the inner surface wall of the fixing plate 8 so that its open end is tightly attached to the outer surface wall of the arc-shaped end of the connecting seat 10, thereby completing the positioning of the ring 7 and the electrical connector 9, so that the position of the electrical connector 9 can be adjusted according to the needs of subsequent connections without affecting the normal electrical connection, thereby improving the application range of the self-limiting temperature electric heating tube.

[0044] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-limiting temperature electric heating tube, characterized in that: Included are: An outer tube sleeve (1) and a plastic liner (6), a PTC conductive polymer (5) is filled between the outer tube sleeve (1) and the plastic liner (6), the outer tube sleeve (1) is provided with wrinkles, and an embedded cable (4) is passed through the inner surface wall of the wrinkles; A connecting seat (10) is fixed on both sides of the outer pipe sleeve (1) and the plastic liner (6), and a flange (3) is fixedly mounted on the side of the connecting seat (10) away from the outer pipe sleeve (1); The embedded cable (4) is longer than the outer tube sleeve (1), and its two horizontal sides extend to the inner surface wall of the connecting seat (10); A matching portion for electrically matching an external electrical component with the embedded cable (4) is provided between the open end of the embedded cable (4) and the inner surface wall of the connecting seat (10), the matching portion comprising a ring (7) sleeved on the outer surface wall of the connecting seat (10) and a metal ball (13) fixedly mounted on the open end of the embedded cable (4); a metal slide rail (11) is fixedly mounted on the inner surface wall of the connecting seat (10); the outer surface wall of the metal ball (13) is slidably connected to the inner surface wall of the metal slide rail (11); an electrical connector (9) that is conductive with the metal slide rail (11) is fixedly mounted on the outer surface wall of the ring (7); and a locking component for positioning the ring (7) is provided on the outer surface wall of the ring (7).

2. A self-limiting temperature electric heating tube according to claim 1, characterized in that: A support ring (2) is fixedly mounted on the outer surface wall of the outer tube sleeve (1), and the inner surface wall of the support ring (2) is also fixed to the outer surface wall of the fold.

3. The self-limiting temperature electric heating tube according to claim 1, characterized in that: The plastic liner (6) is provided with a plurality of groups of inner folds.

4. The self-limiting temperature electric heating tube according to claim 1, characterized in that: A mounting seat (12) is fixedly connected between the outer wall of the outer tube sleeve (1) and the inner wall of the plastic liner (6), and the mounting seat (12) and the connecting seat (10) are integrally formed.

5. The self-limiting temperature electric heating tube according to claim 1, characterized in that: Elastic cushion layers that fit the inner surface wall of the connecting seat (10) are fixedly mounted on both sides of the longitudinal end of the collar (7).

6. The self-limiting temperature electric heating tube according to claim 1, characterized in that: The locking assembly comprises a fixing plate (8) fixedly mounted on the outer wall of the collar (7), a tightening rod being screwedly connected to the inner wall of the fixing plate (8), and an open end of the tightening rod abutting against the outer wall of the arc-shaped end of the connecting seat (10).

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