Internally-connected single-ended metal tubular electric heating element

Abstract

The utility model relates to an internal connection type single-ended metal tubular electric heating element. The internal connection type single-ended metal tubular electric heating element comprises a mounting tube; the connecting end of the electric heating wire is connected with the mounting pipe; the connecting end of the wire is connected with the mounting pipe; the electric heating wire is arranged in the metal pipe, and the wire is led out of the metal pipe away from the mounting pipe in the axial direction of the metal pipe. The insulating filler is filled in the metal tube and is used for insulating and separating the metal tube from the electric heating wire, the mounting tube and the wire; and the sealing assembly comprises a first sealing part and a second sealing part which are arranged at the two ends of the metal pipe in the axial direction, and the sealing assembly is used for sealing the metal pipe. The internal connection type single-end metal tubular electric heating element provided by the utility model has the advantages that the space occupancy rate is small, compared with a U-shaped tubular electric heating element, more electric heating elements can be installed on a flange cover, the electric heating element can be welded with the flange cover in batches, and the electric heating element can be suitable for the working condition environment that the diameter of a pipeline or a container is small.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heaters, in particular to an internally connected single-ended metal tubular electric heating element. Background Art

[0002] The electric heating element uses a metal tube as the outer shell, an alloy heating wire as the heating element, and has a lead rod (wire) at one or both ends. The metal tube is filled with dense magnesium oxide powder insulation medium to fix the heating element. When the current passes through the heating wire, it overcomes the resistance and does work, thereby converting electrical energy into heat energy.

[0003] At present, the U-shaped tubular electric heating element (double-ended type) used in the field of industrial electric heaters is assembled and welded with a flange cover, and then installed in a pipe or container to heat the medium. When the power requirement is large and the diameter of the pipe or container is small, the number of elements that can be installed on the flange cover is less than that of a single-ended metal tubular element because the U-shaped tubular element has a curved part and occupies a large space. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide an internally connected single-ended metal tubular electric heating element to solve the problems that the existing U-shaped tubular electric heating elements have bent parts, occupy a large space, and can be installed on the flange cover in a small number.

[0005] In order to achieve the above-mentioned and other related purposes, the utility model provides an internally connected single-ended metal tubular electric heating element, comprising:

[0006] Installation pipe;

[0007] An electric heating wire, the connecting end of which is connected to the mounting tube;

[0008] A conductor, a connecting end of which is connected to the mounting tube;

[0009] A metal tube, wherein the mounting tube and the electric heating wire are arranged in the metal tube, and the conducting wire is led out of the metal tube away from the mounting tube along the axial direction of the metal tube;

[0010] Insulating filler, filled in the metal tube, used to insulate and separate the metal tube from the electric heating wire, the mounting tube, and the wire;

[0011] The sealing assembly comprises a first sealing component and a second sealing component which are arranged at two axial ends of a metal pipe, and the sealing assembly is used for sealing the metal pipe.

[0012] Optionally, the mounting tube includes a first mounting tube and a second mounting tube, the first mounting tube is inserted into the second mounting tube, and the first mounting tube is connected to the second mounting tube;

[0013] The connecting end of the electric heating wire is connected to the first mounting tube, and the connecting end of the conducting wire is connected to the second mounting tube.

[0014] Optionally, the length of the first mounting tube is smaller than the length of the second mounting tube.

[0015] Optionally, the mounting tube includes a first mounting tube and at least one second mounting tube sleeved outside the first mounting tube, and the first mounting tube is connected to the second mounting tube;

[0016] The connection end of the electric heating wire is connected to one end of the first mounting tube in the axial direction, and the connection end of the wire is connected to the other end of the first mounting tube in the axial direction.

[0017] Optionally, the length of the first mounting tube is equal to the length of the second mounting tube.

[0018] Optionally, the mounting tube is a copper tube or a stainless steel tube.

[0019] Optionally, the insulating filler is magnesium oxide powder.

[0020] Optionally, the first sealing component is used to seal one end of the metal tube leading out the wire, and the first sealing component is an insulating sealing component;

[0021] The second sealing component is used to seal an end of the metal pipe that is axially away from the first sealing component, and the second sealing component is a metal sealing component.

[0022] Optionally, the distance from the connection point between the wire and the mounting tube to the metal tube port is greater than the thickness of the first sealing component.

[0023] Optionally, the distance from the connection point between the electric heating wire and the mounting tube to the metal tube port is greater than the thickness of the second sealing component.

[0024] As described above, the utility model has the following beneficial effects: the application connects the electric heating wire and the copper wire to the installation tube, sleeves the installation tube inside the metal tube, and fills the metal tube with insulating filler to insulate the metal tube from the electric heating wire, the installation tube, and the wire, and the wire is led out from one end of the metal tube, and the two ends of the metal tube are sealed by a sealing assembly, thereby forming the internally connected single-ended metal tubular electric heating element shown in the application. The internally connected single-ended metal tubular electric heating element proposed in the application has a smaller space occupancy rate, and can be installed in larger quantities on the flange cover than the U-shaped tubular electric heating element, can be welded to the flange cover in batches, and can be suitable for working conditions with smaller pipe or container diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Shown is a schematic cross-sectional structure diagram of an internally connected single-ended metal tubular electric heating element according to an embodiment of the present application;

[0026] Figure 2 Shown is a schematic diagram of the assembly structure of an internally connected single-ended metal tubular electric heating element and a flange cover according to an embodiment of the present application.

[0027] Description of Reference Numerals

[0028] The mounting tube 1 , the first mounting tube 101 , the second mounting tube 102 , the electric heating wire 2 , the conducting wire 3 , the metal tube 4 , the insulating filler 5 , the sealing assembly 6 , the first sealing component 601 , the second sealing component 602 , and the flange cover 7 . DETAILED DESCRIPTION

[0029] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0030] See also Figure 1 to Figure 2. It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the utility model in a schematic manner, so the diagram only shows the components related to the utility model rather than being drawn according to the number, shape and size of the components during actual implementation. During actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated. The structure, proportion, size, etc. illustrated in the drawings attached to this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions for the implementation of the utility model, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the utility model without affecting the effect and purpose that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0031] Before describing the embodiment of the utility model in detail, the application environment of the utility model is described first. The technology of the utility model is mainly applied to the technical field of electric heaters. The utility model is used to solve the problem that the existing U-shaped tubular electric heating element has a bent part, occupies a large space, and can be installed on the flange cover in a small number.

[0032] Please combine Figure 1 to Figure 2 As shown, the utility model provides an internally connected single-ended metal tubular electric heating element.

[0033] In an exemplary embodiment of the present application, an internally connected single-ended metal tube 4-shaped electric heating element includes: a mounting tube 1; an electric heating wire 2, wherein the connecting end of the electric heating wire 2 is connected to the mounting tube 1; a conductive wire 3, wherein the connecting end of the conductive wire 3 is connected to the mounting tube 1; a metal tube 4, wherein the mounting tube 1 and the electric heating wire 2 are arranged in the metal tube 4, and the conductive wire 3 is led out of the metal tube 4 away from the mounting tube 1 along the axial direction of the metal tube 4; an insulating filler 5, which is filled in the metal tube 4 and is used to insulate and separate the metal tube 4 from the electric heating wire 2, the mounting tube 1, and the conductive wire 3; a sealing assembly 6, including a first sealing component 601 and a second sealing component 602 arranged at both ends of the metal tube 4 along the axial direction, and the sealing assembly 6 is used to seal the metal tube 4.

[0034] In this embodiment, at least two mounting tubes 1 are included, the electric heating wire 2 is bent to form a "U"-shaped structure, the two connecting ends of the electric heating wire 2 are respectively connected to one mounting tube 1, and the connecting end of the electric heating wire 2 is crimped to the mounting tube 1 at the connection point with a crimping pliers; the other ends of the two mounting tubes 1 are respectively connected to a wire 3, the wire 3 is a peeled copper wire 3, and the connecting end of the wire 3 is crimped to the mounting tube 1 at the connection point with a crimping pliers; and then the insulating filler 5 sleeve is assembled in sequence, inserted into the metal tube 4, the wire 3 is led out from the end of the metal tube 4, the metal tube 4 is shrunk, the insulating filler 5 is pressed tightly in the metal tube 4, the metal tube 4 is stripped and polished, the insulating filler 5 is blown with powder at the two ends of the metal tube 4, and the second sealing component 602 is welded to the end of the metal tube 4 close to the electric heating wire 2 in the axial direction, and the first sealing component 601 is filled at the end of the metal tube 4 where the wire 3 is led out, thereby forming an internally connected single-ended metal tube 4-shaped electric heating element.

[0035] By connecting the electric heating wire 2 and the copper wire 3 to the mounting tube 1, inserting the mounting tube 1 into the metal tube 4, and filling the metal tube 4 with insulating filler 5, the metal tube 4 is insulated from the electric heating wire 2, the mounting tube 1, and the wire 3, the wire 3 is led out from one end of the metal tube 4, and the two ends of the metal tube 4 are sealed by the sealing assembly 6, thereby forming the internal single-ended metal tube 4-shaped electric heating element shown in the present application. The internal single-ended metal tube 4-shaped electric heating element proposed in the present application has a small space occupancy rate, and can be installed on the flange cover 7 in larger quantities than the U-shaped tubular electric heating element, and can be welded to the flange cover 7 in batches, and can be suitable for working conditions with small diameters of pipes or containers.

[0036] It is worth noting that the copper wire 3 of the external single-ended metal tube 4-shaped electric heating element is connected to the exposed element lead-out rod by brazing, and a protective cap is added, and the protective cap is sealed by filling glue. However, the present application reduces the need for the lead-out rod to be connected to the metal tube 4, the brazing of the wire 3 and the lead-out rod, and the crimping of the protective cap by internally connecting the wire 3 to the metal tube 4 of the external single-ended metal tube 4-shaped electric heating element.

[0037] In an exemplary embodiment of the present application, the mounting tube 1 includes a first mounting tube 101 and a second mounting tube 102, the first mounting tube 101 is inserted into the second mounting tube 102, and the first mounting tube 101 is connected to the second mounting tube 102; the connecting end of the electric heating wire 2 is connected to the first mounting tube 101, and the connecting end of the wire 3 is connected to the second mounting tube 102.

[0038] In this embodiment, the mounting tube 1 shown in this embodiment includes two first mounting tubes 101 and two second mounting tubes 102. The electric heating wire 2 is bent to form a "U"-shaped structure. The two ends of the electric heating wire 2 are respectively connected to a first mounting tube 101, and the connection between the electric heating wire 2 and the first mounting tube 101 is crimped by a crimping pliers. The two second mounting tubes 102 are respectively installed with a corresponding wire 3. The two wires 3 are respectively used to connect the positive and negative poles of the power supply. The connection between the wire 3 and the second mounting tube 102 is crimped by a crimping pliers, the first mounting tube 101 is inserted into the second mounting tube 102, and the second mounting tube 102 is crimped to the first mounting tube 101 by a crimping pliers.

[0039] In an exemplary embodiment of the present application, the length of the first mounting tube 101 is shorter than the length of the second mounting tube 102 .

[0040] Through the above technical means, by setting the first mounting tube 101 and the second mounting tube 102, the internally connected single-ended metal tube 4-shaped electric heating element shown in the embodiment of the present application can carry a larger current and can be suitable for working conditions with larger power requirements.

[0041] In an exemplary embodiment of the present application, the mounting tube 1 includes a first mounting tube 101 and at least one second mounting tube 102 sleeved outside the first mounting tube 101, and the first mounting tube 101 is connected to the second mounting tube 102; the connecting end of the electric heating wire 2 is connected to one end of the first mounting tube 101 in the axial direction, and the connecting end of the wire 3 is connected to the other end of the first mounting tube 101 in the axial direction.

[0042] In this embodiment, the mounting tube 1 shown in this embodiment includes two first mounting tubes 101, each of which is sleeved with at least one second mounting tube 102, and the second mounting tube 102 is crimped with the first mounting tube 101, and the two connecting ends of the "U"-shaped electric heating wire 2 are respectively connected to a first mounting tube 101, and the two first mounting tubes 101 are respectively connected to a wire 3, and the two wires 3 are connected to the positive and negative poles of the power supply. The above-mentioned technical means shown in the embodiment of the present application enable the internal single-ended metal tube 4-shaped electric heating element proposed in this application to further carry a larger current, so that it can be applied to working conditions with higher power requirements.

[0043] In an exemplary embodiment of the present application, the length of the first mounting tube 101 is equal to the length of the second mounting tube 102 .

[0044] In an exemplary embodiment of the present application, the installation pipe 1 is a copper pipe or a stainless steel pipe.

[0045] In an exemplary embodiment of the present application, the insulating filler 5 is magnesium oxide powder.

[0046] In an exemplary embodiment of the present application, the first sealing component 601 is used to seal one end of the metal tube 4 leading out the wire 3, and the first sealing component 601 is an insulating sealing component; the second sealing component 602 is used to seal one end of the metal tube 4 axially away from the first sealing component 601, and the second sealing component 602 is a metal sealing component.

[0047] In an exemplary embodiment of the present application, the distance from the connection point between the wire 3 and the mounting tube 1 to the end of the metal tube 4 is greater than the thickness of the first sealing component 601 .

[0048] In this embodiment, a portion of the wire 3 is exposed outside the mounting tube 1 and the first sealing component 601 and is located inside the metal tube 4 and is wrapped by an insulating filler 5 (ie, magnesium oxide powder), which can effectively improve the pull-out resistance of the wire 3 .

[0049] In an exemplary embodiment of the present application, the distance from the connection between the electric heating wire 2 and the mounting tube 1 to the end of the metal tube 4 is greater than the thickness of the second sealing component 602 .

[0050] In this embodiment, there is no contact between the electric heating wire 2 and the second sealing component 602 , and the electric heating wire 2 exposed in the metal tube 4 is wrapped by an insulating filler 5 (ie, magnesium oxide powder), thereby forming an insulating partition between the second sealing component 602 and the electric heating wire 2 .

[0051] It is worth noting that the present application connects the electric heating wire 2 and the copper wire 3 to the mounting tube 1, inserts the mounting tube 1 into the metal tube 4, and fills the metal tube 4 with insulating filler 5, so that the metal tube 4 is insulated from the electric heating wire 2, the mounting tube 1, and the wire 3, and the wire 3 is led out from one end of the metal tube 4, and the two ends of the metal tube 4 are sealed by the sealing assembly 6, thereby forming the internal single-ended metal tube 4-shaped electric heating element shown in the present application. The internal single-ended metal tube 4-shaped electric heating element proposed in the present application has a smaller space occupancy rate, and can be installed on the flange cover 7 in larger quantities than the U-shaped tubular electric heating element, and can be welded to the flange cover 7 in batches, and can be suitable for working conditions with smaller pipe or container diameters.

[0052] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. An internally connected single-ended metal tubular electric heating element, characterized in that: include: Installation pipe; An electric heating wire, the connecting end of which is connected to the mounting tube; A conductor, a connecting end of which is connected to the mounting tube; A metal tube, wherein the mounting tube and the electric heating wire are arranged in the metal tube, and the conducting wire is led out of the metal tube away from the mounting tube along the axial direction of the metal tube; Insulating filler, filled in the metal tube, used to insulate and separate the metal tube from the electric heating wire, the mounting tube, and the wire; The sealing assembly comprises a first sealing component and a second sealing component which are arranged at two axial ends of a metal pipe, and the sealing assembly is used for sealing the metal pipe.

2. The internally connected single-ended metal tubular electric heating element according to claim 1, characterized in that: The mounting tube comprises a first mounting tube and a second mounting tube, the first mounting tube is inserted into the second mounting tube, and the first mounting tube is connected to the second mounting tube; The connecting end of the electric heating wire is connected to the first mounting tube, and the connecting end of the wire is connected to the second mounting tube.

3. The internally connected single-ended metal tubular electric heating element according to claim 2, characterized in that: The length of the first mounting tube is shorter than the length of the second mounting tube.

4. The internally connected single-ended metal tubular electric heating element according to claim 1, characterized in that: The mounting tube includes a first mounting tube and at least one second mounting tube sleeved outside the first mounting tube, and the first mounting tube is connected to the second mounting tube; The connection end of the electric heating wire is connected to one end of the first mounting tube in the axial direction, and the connection end of the wire is connected to the other end of the first mounting tube in the axial direction.

5. The internally connected single-ended metal tubular electric heating element according to claim 4, characterized in that: The length of the first mounting tube is equal to the length of the second mounting tube.

6. The internally connected single-ended metal tubular electric heating element according to claim 1, characterized in that: The installation pipe is a copper pipe or a stainless steel pipe.

7. The internally connected single-ended metal tubular electric heating element according to claim 1, characterized in that: The insulating filler is magnesium oxide powder.

8. The internally connected single-ended metal tubular electric heating element according to claim 1, characterized in that: The first sealing component is used to seal the end of the metal tube leading out the wire, and the first sealing component is an insulating sealing component; The second sealing component is used to seal an end of the metal pipe that is axially away from the first sealing component, and the second sealing component is a metal sealing component.

9. The internally connected single-ended metal tubular electric heating element according to claim 8, characterized in that: The distance from the connection point between the wire and the mounting tube to the metal tube port is greater than the thickness of the first sealing component.

10. The internally connected single-ended metal tubular electric heating element according to claim 8, characterized in that: The distance from the connection point between the electric heating wire and the mounting tube to the metal tube port is greater than the thickness of the second sealing component.

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