Explosion-proof tubular electric heater

Abstract

The utility model discloses an explosion-proof tubular electric heater, which comprises a power-on core ring provided with a connector lug and a heating tube provided with a tube head, the tube head is in threaded connection with a convex tube mounted on the power-on core ring, and a convex ring is arranged on the outer side of the threaded connection position. And the convex ring is rotationally provided with a locking piece which is clamped and fixed with the convex pipe in a default state. According to the explosion-proof tubular electric heater provided by the utility model, the heating tube is easier to disassemble and assemble on the electrifying core ring through threaded connection, the stability is higher, and then the locking piece is used for hooping and clamping the tube head and the raised tube which are in threaded connection, so that the connection position is reinforced and fixed, and the explosion-proof tubular electric heater is convenient to use. And meanwhile, the inner wall of the convex ring can be used for abutting against and shielding the threaded connection position so as to reduce erosion of media to the connection position, and the protection effect on the connection position can be guaranteed while the heating pipe is conveniently taken down.

Description

Technical Field

[0001] This utility model relates to the field of tubular electric heater technology, and more specifically to an explosion-proof tubular electric heater. Background Technology

[0002] Pipeline electric heaters heat the medium flowing inside the pipe and transfer the heat to the medium that needs to be kept warm or heated through the outer wall of the pipe. Alternatively, they can use electric heating wires inside the pipe to generate heat directly.

[0003] According to the publication (announcement) number: CN114501701A, the publication (announcement) date: 2022-05-13, a high-performance portable explosion-proof pipeline electric heater is disclosed, including multiple electric heating elements and an electrode lead-out sealing ring for the end of the electric heating element, so that the end of the electric heating element is protected by an explosion-proof junction box, so as to obtain an electric heating element with leakage protection.

[0004] In the prior art, including the aforementioned patent, when the explosion-proof tubular electric heater is used for heating or heat preservation in a cylinder containing a medium, some of the medium is prone to scaling on the outer wall of the tube after being heated. This scaling affects the heat conduction efficiency of the tube after long-term use and also causes corrosion. When the scaling reaches the tube and the energized core ring, it can also corrode the welded parts of the tube, causing damage to the tube and exposing the internal medium or heating wire. This can lead to contamination of the medium inside the cylinder and even leakage. Therefore, it is necessary to remove the tube from the energized core ring for cleaning or replacement to maintain the original heat preservation or heating efficiency. Utility Model Content

[0005] The purpose of this invention is to provide an explosion-proof tubular electric heater, which aims to solve the problems mentioned above.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An explosion-proof tubular electric heater includes an energized core ring with a terminal block and a heating tube with a tube head. The tube head and the energized core ring are connected by a threaded connection, and a protruding ring is provided on the outer side of the threaded connection position.

[0008] The convex ring is rotatably equipped with a locking element for securing it to the protruding tube in its default state.

[0009] Preferably, the locking member is divided into a driving plate and an elastic plate according to its function. The side wall of the protruding tube is provided with a circumferentially arranged recess, and the end of the elastic plate is provided with an arc pressure plate for engaging with the recess.

[0010] Preferably, the convex ring has an opening for the drive plate and the elastic plate to move.

[0011] Preferably, it also includes a sheath that is snapped into the drive board and slides on the outside of the convex ring.

[0012] Preferably, a sleeve head is fixedly installed at the end of the sheath, and a thickened end is provided on the energized core ring that is threadedly connected to the sleeve head.

[0013] Preferably, the end of the convex ring is provided with an outer tube located outside the heating tube.

[0014] Preferably, the outer tube has multiple holes.

[0015] Preferably, a protruding strip is fixedly installed in the protruding ring between adjacent locking members, and the protruding strip abuts against the outer wall of the heating tube.

[0016] Preferably, the outer wall of the sheath has multiple annular holes.

[0017] Preferably, the outer tube is a stainless steel metal tube.

[0018] In the above technical solution, the explosion-proof tube electric heater provided by this utility model has the following beneficial effects: the heating tube is more easily disassembled and assembled on the energized core ring by means of threaded connection, and the stability is also high. Then, the locking part is used to clamp the tube head and the protruding tube after threaded connection, so as to strengthen and fix the connection position. At the same time, the inner wall of the protruding ring can be used to resist and block the threaded connection position to reduce the corrosion of the connection position by the medium. While making it easy to remove the heating tube, it can also ensure the protection of the connection position. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 A schematic diagram of a tubular heater provided in an embodiment of this utility model;

[0021] Figure 2 A side cross-sectional view of a portion of the energized core ring, heating tube, and outer tube provided in an embodiment of this utility model.

[0022] Figure 3 This is a schematic diagram of the explosion of the heating tube and the outer tube provided in an embodiment of the present utility model;

[0023] Figure 4 An exploded view of the locking component and sheath provided in an embodiment of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Energized core ring; 11. Terminal; 12. Thickened end; 13. Raised tube; 2. Heating tube; 21. Tube head; 3. Outer tube; 31. Tube hole; 32. Raised ring; 33. Raised strip; 34. Opening; 4. Locking component; 41. Drive plate; 42. Elastic plate; 43. Arc pressure plate; 5. Sheath; 51. Sleeve head. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] like Figure 1-4 As shown, an explosion-proof tubular electric heater includes an energized core ring 1 with a terminal 11, and a heating tube 2 with a tube head 21. The tube head 21 and a protruding tube 13 installed on the energized core ring 1 are threadedly connected, and a protruding ring 32 is provided on the outside of the threaded connection position.

[0028] The convex ring 32 is rotatably equipped with a locking element 4 for securing to the protruding tube 13 in the default state.

[0029] Specifically, the connector 11 is fitted with an electric heating wire and inserted into the heating tube 2, and the energized core ring 1 has a hole that connects to the protruding tube 13. The installation position of the energized core ring 1, the connector 11 on it, and the wiring and energizing method are all existing technologies and will not be described in detail here.

[0030] Furthermore, the material of the heating tube 2 body is existing technology, which will not be described in detail here. The lower end of the protruding tube 13 has a hole that connects with the thread, and there is also a vertical channel in the hole that connects with the heating tube 2 so that the electric heating wire can pass through and enter the heating tube 2.

[0031] By threading the tube head 21 and the protruding tube 13 together, the heating tube 2 can be more easily installed and removed from the energized core ring 1, and the stability is also higher. Then, the locking part 4 is used to clamp the threaded tube head 21 and the protruding tube 13 to strengthen and fix the connection position. At the same time, the inner wall of the protruding ring 32 can be used to reinforce and block the threaded connection position to reduce the corrosion of the connection position by the medium. This makes it easy to remove the heating tube 2 while ensuring the protection of the connection position.

[0032] As a further embodiment of this utility model, the locking member 4 is divided into a drive plate 41 and an elastic plate 42 according to its function. A circumferentially arranged recess is provided on the side wall of the protruding tube 13, and an arc pressure plate 43 for engaging with the recess is provided at the end of the elastic plate 42.

[0033] Specifically, the top corner of the connection position between the drive plate 41 and the elastic plate 42 is hinged in the convex ring 32, and a torsion spring is provided at the hinge position. The torsion spring and its connection method are existing technologies and will not be described in detail here.

[0034] Furthermore, the arc pressure plate 43 is specifically an arc-shaped rigid metal plate, while the middle part of the elastic plate 42 is an elastic metal sheet, so that when the elastic plate 42 applies pressure to fix the arc pressure plate 43, it can also have a certain elastic buffering capacity.

[0035] By using the elastic plate 42 in the default state, the arc top on the arc pressure plate 43 is engaged in the recess, so as to connect and secure the convex ring 32 and the energized core ring 1, so that a stable connection is obtained after sealing.

[0036] As another embodiment further provided in this utility model, the convex ring 32 is provided with an opening 34 for the drive plate 41 and the elastic plate 42 to move.

[0037] Specifically, the opening 34 has a circumferential arc range that provides for the movement of the hinge position, so as to ensure that the hinge movement is generated normally.

[0038] The opening 34 allows the drive plate 41 and the elastic plate 42 to move stably and smoothly on the convex ring 32.

[0039] As a further embodiment of this utility model, a sheath 5 is also included, which is snap-fitted to the drive plate 41 and slides on the outside of the protruding ring 32.

[0040] The upward-tilting drive plate 41 provides the sheath 5 with downward hooking capability and upward blocking capability, making it less likely for the vertically placed sheath 5 to be seriously misaligned with the convex ring 32. At the same time, it can also provide more shielding protection for the convex ring 32 and the protruding tube 13, further improving the protection effect on the connection position of the heating tube 2.

[0041] As a further embodiment of this utility model, a sleeve head 51 is fixedly installed at the end of the sheath 5, and a thickened end 12 is provided on the energized core ring 1 that is threadedly connected to the sleeve head 51.

[0042] Specifically, the thickened end 12 is a circular part on the energized core ring 1 with increased thickness, which facilitates the formation of a notch for threaded connection at the lower end of the thickened end 12, so that the notch and the sleeve 51 are threadedly connected.

[0043] The sleeve 51 makes it easier to assemble the sheath 5 with the energized core ring 1, and also allows the sleeve 51 to function as a thread shield.

[0044] As another embodiment of this utility model, the end of the convex ring 32 is provided with an outer tube 3 located outside the heating tube 2.

[0045] Specifically, the outer tube 3 is fixedly installed at the port of the convex ring 32 and maintains a predetermined distance from the heating tube 2.

[0046] The outer tube 3 can shield and protect the heating tube 2, reducing the wear and scaling caused by the flow of the medium on the outer wall of the heating tube 2. However, the heating tube 2 still needs to be disassembled and reassembled so that the heating tube 2, which is longer than the outer tube 3, can also be directly removed by twisting.

[0047] As another embodiment provided in this utility model, the outer tube 3 is provided with a plurality of tube holes 31.

[0048] The medium can flow through the pipe hole 31, and the heat generated by the heating tube 2 can also be quickly transferred to the cylindrical container through the pipe hole 31.

[0049] As another embodiment provided in this utility model, a protruding strip 33 is fixedly installed in the protruding ring 32 between adjacent locking members 4, and the protruding strip 33 abuts against the outer wall of the heating tube 2.

[0050] Specifically, the convex strip 33 exists only on the inner sidewall of the convex ring 32 and is integrally formed.

[0051] The protrusion 33 directly contacts the threaded connection of the heating tube 2, and the gap between adjacent protrusions 33 is axially blocked by the elastic plate 42 and the arc pressure plate 43. The purpose is to block the medium flowing into the sheath 5 and reduce the problem of the parts at the locking part 4 being unable to move due to scale.

[0052] As another embodiment provided in this utility model, the outer wall of the sheath 5 is provided with a plurality of annular holes.

[0053] The annular holes create pleats on the outside of the sheath 5 to provide friction during the pushing and pulling of the sheath 5, facilitating manual operation.

[0054] As another embodiment further provided in this utility model, the outer tube 3 is specifically a stainless steel metal tube.

[0055] The stainless steel outer tube 3 makes it more corrosion resistant, reduces scaling on the outer tube 3, reduces blockage of the tube hole 31, and reduces the impact on temperature transfer.

[0056] Working principle: By threading the tube head 21 and the protruding tube 13, the heating tube 2 can be more easily installed and removed from the energized core ring 1, and the stability is also high. Then, the locking part 4 is used to clamp the threaded tube head 21 and the protruding tube 13 to strengthen the fixation of the connection position. Furthermore, the threaded connection between the sleeve head 51 on the sheath 5 and the energized core ring 1 strengthens the protection of the heating tube 2 after installation.

[0057] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An explosion-proof tubular electric heater comprising a current-carrying core ring (1) provided with a terminal head (11), characterized in that, It also includes a heating tube (2) with a tube head (21), wherein the tube head (21) and the protruding tube (13) installed on the energized core ring (1) are threadedly connected, and a protruding ring (32) is provided on the outside of the threaded connection position; The protruding ring (32) is rotatably provided with a locking element (4) for securing to the protruding tube (13) in the default state.

2. An explosion-proof tubular electric heater as set forth in claim 1 wherein, The locking member (4) is divided into a drive plate (41) and an elastic plate (42) according to its function. The side wall of the protruding tube (13) is provided with a circumferentially arranged recess, and the end of the elastic plate (42) is provided with an arc pressure plate (43) for fitting into the recess.

3. An explosion-proof tubular electric heater as set forth in claim 2 wherein, The protruding ring (32) has an opening (34) for the drive plate (41) and the elastic plate (42) to move.

4. The explosion-proof tubular electric heater according to Claim 2 wherein, It also includes a sheath (5) that is snapped into the drive plate (41) and slides on the outside of the protruding ring (32).

5. An explosion-proof tubular electric heater as recited in claim 4 wherein, The end of the sheath (5) is fixedly installed with a sleeve head (51), and the energized core ring (1) is provided with a thickened end (12) that is threadedly connected to the sleeve head (51).

6. An explosion-proof tubular electric heater according to claim 4 wherein, The end of the convex ring (32) is provided with an outer tube (3) located outside the heating tube (2).

7. An explosion-proof tubular electric heater as set forth in claim 6 wherein, The outer tube (3) has multiple tube holes (31).

8. The explosion-proof tubular electric heater according to Claim 6 wherein, A protruding strip (33) is fixedly installed in the protruding ring (32) between adjacent locking members (4), and the protruding strip (33) abuts against the outer wall of the heating tube (2).

9. The explosion-proof tubular electric heater according to Claim 6 wherein, The outer wall of the sheath (5) has multiple annular holes.

10. The explosion-proof tubular electric heater according to Claim 6 wherein, The outer tube (3) is specifically a stainless steel metal tube.

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