Movable thread type heating pipe with overheating protection function

Abstract

The utility model discloses a movable thread type heating tube with overheating protection, which relates to the technical field of heating tubes and comprises an external protection device, and a fixing device and a heating device are respectively arranged at the front end and inside the external protection device. The heating device comprises a heating wire, the heating wire is electrically connected with a normally-closed temperature control relay, the outside of the normally-closed temperature control relay is connected with a second wire and a first wire, and a copper terminal and a guide rod are further arranged on the second wire. According to the utility model, the normally-closed temperature control relay is embedded in the insulating mounting head, the temperature switch is closed in the original state, when the sensed temperature exceeds the set rated temperature, the contact is disconnected to cut off power, and when the temperature reaches the critical point, the contact is activated to play a role in protecting the heating tube in a power-off manner.

Description

Technical Field

[0001] The utility model specifically relates to the technical field of heating tubes, in particular to a movable screw-thread type heating tube with overheat protection. Background Art

[0002] Traditional electric heating tubes do not have overheating protection devices. They are prone to overheating when used improperly, such as dry burning, which may cause damage to the equipment or even harm the staff. Generally, an overheating protection device such as a temperature control box is attached according to needs during use to indirectly play the role of overheating protection.

[0003] This utility model features an electric heating tube with a built-in overheat protector, effectively protecting it. When the temperature reaches a certain limit, the resistor inside the overheat protector activates, disconnecting the power supply and stopping heating within the system to prevent further damage or safety hazards. This is a recoverable temperature control device with high reliability and sensitivity, thanks to its embedded design. Utility Model Content

[0004] The purpose of the utility model is to provide a movable screw-type heating tube with overheat protection, which is connected to an external protection device through a heating device, and then the fixing device is installed and fixed to the external protection device. The heating tube has the function of overheat protection and is safe; so as to solve the technical problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A movable screw-thread heating tube with overheat protection, comprising

[0007] An external protection device, wherein a fixing device and a heating device are respectively provided at the front end and the inside of the external protection device;

[0008] The heating device includes a heating wire, which is electrically connected to a normally closed temperature control relay. The normally closed temperature control relay is externally connected to a second wire and a first wire, and a copper terminal and a lead rod are provided on the second wire.

[0009] As a further technical solution of the present invention, the heating wire is wound on an insulating hollow bracket, and an insulating mounting head is fixed at one end of the insulating hollow bracket; a groove and a spring locking block are provided on one side of the insulating mounting head for facilitating the clamping and fixing of the normally closed temperature control relay.

[0010] As a further technical solution of the present invention, the guide rods inside the wire one and the wire two are respectively connected to the insulating mounting head and the normally closed temperature control relay through two quick-plug connectors; the quick-plug connectors can be quickly plugged in.

[0011] As a further technical solution of the present invention, the external protection device includes a metal outer diameter shell, the interior of the metal outer diameter shell is a cavity for installing an insulating hollow bracket and a heating wire, and an interlayer is provided between the cavity and the outer surface of the metal outer diameter shell, and the interlayer is filled with an insulating layer.

[0012] As a further technical solution of the present invention, a movable screw thread is provided at one end of the metal outer diameter shell, and a fixed limit plate is provided between the movable screw thread and the metal outer diameter shell. After the connection, the insulating mounting head and the insulating hollow bracket are fixed in the cavity inside the metal outer diameter shell.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model has a normally closed temperature control relay embedded in the insulating mounting head, and the original state of the temperature switch is closed. When the temperature exceeds the rated temperature set in the configuration, the contact is disconnected and the power is cut off. It can also be activated when the temperature reaches the critical point, which plays the effect of power-off protection for the heating tube. The utility model has a normally closed temperature control relay embedded in the insulating mounting head, and a spring locking block is provided on the insulating mounting head, which can fix and quickly install the normally closed temperature control relay. The insulating mounting head is installed on the head of the insulating hollow bracket, which increases the stability and ensures that the normally closed temperature control relay will not be offset due to movement. At the same time, the insulating mounting head prevents the normally closed temperature control relay from directly contacting the inner wall of the electrical insulation layer to cause damage. ; In the utility model, when installing and fixing, the metal outer diameter shell is equipped with movable screw threads, and the screw threads are limited to a certain range of movement. There is a certain space for the installation depth, which increases the applicability of the installation, and then a fixed limit plate is used to limit the movable range of the movable screw threads. The remaining margin is convenient for the installation of the heating wire and the insulating hollow bracket in the metal mold; In the utility model, the heating device adopts a single-end series output form, and is connected to the quick plug-in connector on the outside, which realizes quick plug-in and is beneficial to the wiring and installation of the wiring, and is easy to maintain and manage; The insulating hollow bracket can use insulating materials including but not limited to magnesium oxide, silicon nitride, boron nitride, etc., which have excellent electrical insulation, thermal conductivity and mechanical strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0016] Figure 2 This utility model Figure 1 Cross-sectional view of .

[0017] Figure 3 This utility model Figure 1 Schematic diagram of the internal structure.

[0018] Figure 4 This utility model Figure 3Schematic diagram of the planar structure.

[0019] Figure 5 This utility model Figure 4 AA cross-sectional view.

[0020] Figure 6 This utility model Figure 5 A partial enlarged schematic diagram.

[0021] Figure 7 This utility model Figure 3 A partial enlarged schematic diagram.

[0022] In the figure: 1-external protection device, 2-fixing device, 3-heating device;

[0023] 11-metal outer diameter shell, 12-insulation layer;

[0024] 21-fixed limit piece, 22-movable screw thread;

[0025] 31-Wire 1, 32-Copper terminal, 33-Lead rod, 34-Insulated mounting head, 35-Normally closed temperature control relay, 36-Quick plug connector, 37-Heating wire, 38-Insulated hollow branch, 39-Wire 2, 310-Spring locking block. 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention. Specific embodiments

[0028] Example 1

[0029] See also Figure 1-5 In an embodiment of the present invention, a movable screw-type heating tube with overheat protection includes an external protection device 1, and a fixing device 2 and a heating device 3 are respectively provided at the front end and the inside of the external protection device 1;

[0030] The heating device 3 includes a heating wire 37, which is electrically connected to a normally closed temperature control relay 35. The normally closed temperature control relay 35 is externally connected to a second wire 39 and a first wire 31. A copper terminal 32 and a lead rod 33 are also provided on the second wire 39.

[0031] The heating wire 37 is wound on an insulating hollow bracket 38, and an insulating mounting head 34 is fixed at one end of the insulating hollow bracket 38; one side of the insulating mounting head 34 is provided with a groove and a spring locking block 310 for facilitating the clamping and fixing of the normally closed temperature control relay 35.

[0032] By adopting the above technical solution, a normally closed temperature control relay 35 is embedded in the insulating mounting head 34. The original state of the temperature switch is closed. When the sensed temperature exceeds the rated temperature set in the configuration, the contact is disconnected and the power is cut off, and the heating wire 37 stops heating. It can also be activated when the temperature reaches a critical point to play the effect of power-off protection of the heating tube;

[0033] The normally closed temperature control relay 35 is embedded in the insulating mounting head 34, and a spring locking block 310 is provided on the insulating mounting head 34, which can fix and quickly install the normally closed temperature control relay 35; the insulating mounting head 34 is installed on the head of the insulating hollow bracket 38, which increases stability and ensures that the normally closed temperature control relay 35 will not be offset due to movement. At the same time, the insulating mounting head 34 prevents the normally closed temperature control relay 35 from directly contacting the inner wall of the electrical insulation layer 12 and causing damage.

[0034] Example 2

[0035] The guide rods inside the wire 1 31 and the wire 2 39 are respectively connected to the insulating mounting head 34 and the normally closed temperature control relay 35 through two quick-plug connectors 36; the quick-plug connectors 36 can be quickly plugged in.

[0036] By adopting the above technical solution, the heating tube adopts a single-end series outlet form and is connected to the quick-plug connector 36 on the outside, which is convenient for wiring and installation while achieving quick plug and unplug, and is easy to maintain and manage.

[0037] In this embodiment, the external protection device 1 includes a metal outer diameter shell 11, the interior of the metal outer diameter shell 11 is a cavity for installing an insulating hollow bracket 38 and a heating wire 37, and an interlayer is provided between the cavity and the outer surface of the metal outer diameter shell 11, and the interlayer is filled with an insulating layer 12.

[0038] By adopting the above technical solution, the insulating hollow bracket 38 can use insulating materials including but not limited to magnesium oxide, silicon nitride, boron nitride, etc., and has excellent electrical insulation, thermal conductivity and mechanical strength.

[0039] In this embodiment, a movable screw thread 22 is provided at one end of the metal outer diameter shell 11, and a fixed limit plate 21 is provided between the movable screw thread 22 and the metal outer diameter shell 11. After being connected, the insulating mounting head 34 and the insulating hollow bracket 38 are fixed in the cavity inside the metal outer diameter shell 11.

[0040] By adopting the above technical solution, during installation and fixing, the metal outer diameter shell 11 is provided with a movable screw thread 22, and the screw thread is limited to have a certain range of movement, leaving a certain space for the installation depth, thereby increasing the applicability of the installation. Then, a fixed limit plate 21 is used to limit the movable range of the movable screw thread 22, and the remaining margin facilitates the installation of the heating wire 37 and the insulating hollow bracket 38 in the metal mold.

[0041] The working principle of the present invention is as follows: a normally closed temperature control relay 35 is embedded in the insulating mounting head 34. The original state of the temperature switch is closed. When the sensed temperature exceeds the rated temperature set by the configuration, the contact is disconnected and the power is cut off, and the heating wire 37 stops heating. It can also be activated when the temperature reaches a critical point to play the effect of power-off protection of the heating tube;

[0042] The normally closed temperature control relay 35 is embedded in the insulating mounting head 34. A spring locking block 310 is provided on the insulating mounting head 34 to facilitate quick installation of the normally closed temperature control relay 35. The insulating mounting head 34 is mounted on the head of the insulating hollow bracket 38, which increases stability and ensures that the normally closed temperature control relay 35 does not shift due to movement. The insulating mounting head 34 also prevents the normally closed temperature control relay 35 from directly contacting the inner wall of the electrical insulation layer 12 and causing damage.

[0043] During installation and fixing, the metal outer diameter shell 11 is provided with a movable screw thread 22. The screw thread is limited to a certain range of movement, leaving a certain space for the installation depth, thereby increasing the applicability of the installation. Then, a fixed limit piece 21 is used to limit the movable range of the movable screw thread 22, leaving a margin to facilitate the installation of the heating wire 37 and the insulating hollow bracket 38 in the metal mold;

[0044] The heating tube adopts a single-end series outlet form and is connected to the quick-plug connector 36 on the outside, which not only realizes quick plug-in and unplugging, but also facilitates the wiring and installation of the wiring, and is easy to maintain and manage; the insulating hollow bracket 38 can use insulating materials including but not limited to magnesium oxide, silicon nitride, boron nitride, etc., and has excellent electrical insulation, thermal conductivity and mechanical strength.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0046] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A movable screw-thread heating tube with overheat protection, characterized by: include An external protection device (1), wherein a fixing device (2) and a heating device (3) are respectively provided at the front end and the interior of the external protection device (1); The heating device (3) includes a heating wire (37), which is electrically connected to a normally closed temperature control relay (35), wherein the normally closed temperature control relay (35) is externally connected to a second conductor (39) and a first conductor (31), and a copper terminal (32) and a lead rod (33) are also provided on the second conductor (39).

2. The movable screw-thread heating tube with overheat protection according to claim 1, characterized in that: The heating wire (37) is wound on an insulating hollow bracket (38), and an insulating mounting head (34) is fixed to one end of the insulating hollow bracket (38); wherein a groove and a spring locking block (310) are provided on one side of the insulating mounting head (34) for facilitating the clamping and fixing of the normally closed temperature control relay (35).

3. The movable screw-thread heating tube with overheat protection according to claim 2, characterized in that: The guide rods inside the wire 1 (31) and the wire 2 (39) are respectively connected to the insulating mounting head (34) and the normally closed temperature control relay (35) through two quick-plug connectors (36); the quick-plug connectors (36) can be quickly plugged in.

4. The movable screw-thread heating tube with overheat protection according to claim 3 is characterized in that: The external protection device (1) includes a metal outer diameter shell (11), the interior of the metal outer diameter shell (11) is a cavity for installing an insulating hollow bracket (38) and a heating wire (37), and an interlayer is provided between the cavity and the outer surface of the metal outer diameter shell (11), and the interlayer is filled with an insulating layer (12).

5. The movable screw-thread heating tube with overheat protection according to claim 4, characterized in that: A movable screw thread (22) is provided at one end of the metal outer diameter shell (11), and a fixed limit plate (21) is provided between the movable screw thread (22) and the metal outer diameter shell (11). After being connected, the insulating mounting head (34) and the insulating hollow bracket (38) are fixed in the cavity inside the metal outer diameter shell (11).

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