Tubular PTC (Positive Temperature Coefficient) electric heater with protective structure

Abstract

The utility model relates to the technical field of heaters, in particular to a tubular PTC (Positive Temperature Coefficient) electric heater with a protective structure. The tubular PTC electric heater with the protective structure comprises a tubular PTC heater, and a protective cover is arranged at one end, where wires are distributed, of the tubular PTC heater; the pipe hole is formed in the eccentric position of the top of the protective cover, and the pipe hole is connected with a pipe opening in one end, full of electric wires, of the tubular PTC heater; the protective cover is provided with the wire inlets which are in one-to-one correspondence with the wire outlet positions of the tubular PTC heater; and the concentrating port is formed in the plane where the wire inlet is located. According to the utility model, by designing the shell with the protective cover, the electric wire of the tubular PTC electric heater is placed in the shell, so that the electric wire of the tubular PTC electric heater is separated from the outside, and the electric wire of the PTC electric heater is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heaters, in particular to a tubular PTC electric heater with a protection structure. Background Art

[0002] The tubular PTC electric heater is an aluminum tube heater that contains the PTC element and has a radiator on the periphery of the aluminum tube, which is finally fixed into an integrated structure. Using PTC elements as heating sources has become a trend in the field of electric heating technology.

[0003] The wires of existing tubular PTC electric heaters are all arranged in a surrounding manner at one end of the heater. The wires need to be adjusted and fixed during installation. When there are a large number of heaters, the installation is more troublesome, and during long-term use, the external environment is very likely to damage the wires.

[0004] Therefore, it is necessary to design a tubular PTC electric heater with a protective structure. Utility Model Content

[0005] In order to overcome the shortcomings of existing tubular PTC electric heaters, which require adjustment and fixing of wires during installation, are troublesome to install when there are a large number of heaters, and are very likely to be damaged by the external environment during long-term use, a technical problem to be solved is to provide a tubular PTC electric heater with a protective structure.

[0006] The technical scheme is as follows: A tubular PTC electric heater with a protective structure, comprising: a tubular PTC heater and a protective cover, wherein the end of the tubular PTC heater covered with wires is provided with a protective cover; a tube hole, wherein a tube hole is provided at an eccentric position on the top of the protective cover, and the tube hole is connected to the tube opening at the end of the tubular PTC heater covered with wires; a wire inlet, wherein the protective cover is provided with a wire inlet corresponding to the wire outlet position of the tubular PTC heater; a centralizing opening, wherein a centralizing opening is provided on the plane where the wire inlet is located; a protective shell, wherein the protective shell is fixedly provided on the protective cover, and the protective cover and the protective shell are connected through the centralizing opening; a wire outlet, wherein the wire outlet is provided on the plane of the protective shell away from the centralizing opening; a flip-up cover ... Cover, the flip cover is rotatably arranged at the larger opening on the outside of the protective shell to cover the hole, and one end of the flip cover is fixedly connected to the protective cover by screws; end cover, the end cover is fixedly arranged on the outside of the protective cover by screws and matches with the pipe hole; conical rubber clamp, the conical rubber clamp is fixedly arranged at each outlet, and the inner part of the protective cover is in a three-claw shape, and the outline is conical, and the through hole part is for the power line to pass through; partition, the partition is fixedly arranged in the protective cover on the plane where the outlet is located, and the partition is fixedly arranged in parallel with the plane where the outlet is located, and there is a threaded hole corresponding to the outlet one by one; screw tube, the screw tube is arranged on the partition and matches with the threaded hole, and the shape of the screw tube is like a cup.

[0007] Preferably, it also includes: a polished rod, which is fixedly arranged at the upper end of the central port; a movable clamp, which is symmetrically and slidably arranged on the polished rod; and a screw rod, which is threadedly arranged between the ends of the two movable clamps away from the polished rod.

[0008] Preferably, it also includes: small staples, which are fixedly arranged beside the line entry port away from the centralized port; and large staples, which are symmetrically fixedly arranged between several small staples away from the centralized port and the centralized port.

[0009] Preferably, it also includes: a winding disk, which is fixedly arranged in the protective shell.

[0010] Preferably, it also includes: a protruding block, which is symmetrically arranged at one end of the tubular PTC heater close to the protective cover; and a frustum, which is symmetrically fixedly arranged outside the plane where the wire inlet of the protective cover is located and fixedly cooperates with the protruding block.

[0011] The utility model has the following advantages: 1. In the utility model, a protective cover is designed to place the wires of the tubular PTC electric heater therein, so that the wires of the tubular PTC electric heater are separated from the outside, thereby protecting the PTC hot gas wires.

[0012] 2. There is a conical rubber clamp at the wire outlet, and the distance between the screw tube and the conical rubber clamp is reduced by rotating the screw tube on the partition. The screw tube and the conical rubber clamp are in contact and gradually approach each other, causing the inner wall of the screw tube to squeeze the conical rubber clamp, making the opening of the conical rubber clamp smaller, thereby clamping the wire head at the outlet to ensure that the wire will not be pulled out from the outlet at will. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0014] Figure 2 This is a schematic diagram of a first partial three-dimensional structure of the utility model.

[0015] Figure 3 This is a schematic diagram of a second partial three-dimensional structure of the utility model.

[0016] Figure 4 It is a schematic diagram of the third partial three-dimensional structure of the utility model.

[0017] Figure 5 It is a partial three-dimensional structural cross-sectional schematic diagram of the utility model.

[0018] Figure numbers: 1_tubular PTC heater, 2_protective cover, 3_tube hole, 4_wire inlet, 5_central port, 6_protective shell, 7_flip cover, 8_end cover, 9_light rod, 10_movable clamp, 11_screw rod, 12_wire outlet, 13_conical rubber clamp, 14_partition, 15_screw tube, 16_protruding block, 17_truncated table, 18_small staple, 19_large staple, 20_winding disk. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Example 1

[0021] like Figures 1 to 5 As shown, the utility model provides a tubular PTC electric heater with a protective structure, which specifically includes a PTC tubular heater 1, a protective cover 2, a tube hole 3, a wire inlet 4, a central port 5, a protective shell 6, a flip cover 7, an end cover 8, a wire outlet 12, a conical rubber clamp 13, a partition 14 and a spiral tube 15;

[0022] Among them, a protective cover 2 is provided at one end of the tubular PTC heater 1 covered with wires, a pipe hole 3 is provided at an eccentric position on the top of the protective cover 2, and the pipe hole 3 is connected to the pipe opening at one end of the tubular PTC heater 1 covered with wires, and a wire entry port 4 corresponding to the wire outlet position of the tubular PTC heater 1 is opened on the protective cover 2, and a central opening 5 is opened on the plane where the wire entry port 4 is located, and a protective shell 6 is fixedly arranged on the protective cover 2, and the protective cover 2 and the protective shell 6 are connected through the central opening 5, and the wire outlet 12 is opened on the plane of the protective shell 6 away from the central opening 5, and the flip cover 7 is rotatably arranged at the larger opening on the outside of the protective shell 6 to cover the hole, and one end of the flip cover 7 is fixedly connected to the protective cover 2 by screws, and the end cover 8 is fixedly arranged on the outside of the protective cover 2 by screws, and cooperates with the pipe hole 3 to provide closed protection for the wires;

[0023] Among them, the conical rubber clamp 13 is fixedly arranged on the top of each outlet 12, and is in a three-claw shape inside the protective cover 2, and the outline is conical. The through hole part is used for the power line to pass through. The partition 14 is fixedly arranged in the protective cover 2 in a plane parallel to the outlet 12. The partition 14 is fixedly arranged in the plane parallel to the outlet 12, and there is a threaded hole corresponding to the outlet 12 one by one. The screw 15 is arranged on the partition 14 and is threadedly matched with the threaded hole. The screw 15 is shaped like a cup and is used to clamp and fix the wires with controllable tightness.

[0024] In the utility model, a tubular PTC heater 1 with a protective cover 2 is designed. The heater is used to protect the heater wires from being exposed to the outside, to prevent the external environment from affecting the inherent wires on the tubular PTC and affecting the normal operation of the tubular PTC or causing the maintenance and replacement of the tubular PTC. The original tubular PTC heater 1 is redesigned and modified to design the tubular PTC heater 1. The principle is as follows: the wires are installed through the end cover 8 and the flip cover 7, and some devices in the protective cover 2 are used. The staff inserts the wires distributed on the tubular PTC heater 1 into the protective cover 2 through the wire inlet 4, and the ends of the tubular PTC wires come out through the wire outlet 12. After closing the end cover 8 and the flip cover 7, the main body of the tubular PTC electric heater wires can be ensured to be in the closed space of the protective cover 2, so as to protect the main body of the wires from being affected by the external environment. In the protective cover 2, a cone-shaped The rubber clamp 13 is provided with a partition 14, and a spiral tube 15 is provided on the partition 14. The conical rubber clamp 13 is hollow and the opening is larger than the PTC electric heater wire. The conical rubber clamp 13 is in a three-claw shape in the protective cover 2, and the contour is conical. By rotating the spiral tube 15 on the partition 14, the spiral tube 15 is brought close to the conical rubber clamp 13. When the conical contour part of the conical rubber clamp 13 touches the inner wall edge of the spiral tube 15, the spiral tube 15 is constantly approached, and the inner wall of the spiral tube 15 is closed. The wall gradually presses toward the wider part of the conical rubber clamp 13, the three-claw part of the conical rubber clamp 13 is squeezed, and the hole of the hollow part of the conical rubber clamp 13 becomes smaller until it cooperates with and clamps the wire. When the screw tube 15 is reversed, the screw tube 15 moves away from the conical rubber clamp 13, the tube mouth becomes larger, and the wire end is not clamped. In this way, the screw tube 15 controls whether the conical rubber clamp 13 clamps the wire, so that the wire placed in the protective cover 2 can be freely pulled out, or the wire can be fixed to prevent the wire in the protective cover 2 from being pulled out.

[0025] Example 2

[0026] like Figure 4 and Figure 5 As shown, based on Example 1, it specifically includes a light rod 9, a movable clamp 10 and a screw 11. The light rod 9 is fixedly arranged at the upper end of the central port 5, and the movable clamp 10 is symmetrically slidably arranged on the light rod 9. The screw 11 is threaded between the ends of the two movable clamps away from the light rod 10.

[0027] Although the central port 5 centralizes the scattered wires entering from the wire inlet 4 and leads them to the protective shell 6, it still appears too messy. Therefore, a simple device fixed by a screw 11 is provided at the central port 5 away from the protective shell 6. The staff first controls the movable clamp 10 by hand to clamp the bundle of wires. Since one end of the movable clamp 10 is a bare rod 9, the clamping degree cannot be controlled. Therefore, the screw 11 is used to pass one end of the two movable clamps 10 through and fix them. Then the staff can let go. In this way, the wires are concentrated into bundles at the central port 5, which is convenient for the staff to organize many wires. It can also prevent the staff from excessive pulling when performing related operations when organizing the wires later, thereby protecting the wires.

[0028] like Figure 4 and Figure 5 As shown, based on Example 1, it specifically also includes a small staple 18 and a large staple 19. The small staple 18 is fixedly arranged beside the line entry 4 away from the centralized opening 5, and the large staple is symmetrically fixedly arranged between several small staples 18 away from the centralized opening 5 and the centralized opening 5.

[0029] The small staples 18 and the large staples 19 classify the electric wires and place them in order, so that the circuit conditions are clear at a glance when the staff is overhauling, which is convenient for the staff to overhaul.

[0030] like Figure 5 As shown, based on the embodiment 1, it specifically includes a winding disk 20, and the winding disk 20 is fixedly arranged in the protective shell 6.

[0031] When the wires are too long, the distance from the central port 5 to the outlet port 12 can be increased by winding the wires, so that the wires are arranged in order in the protective shell 6, the wires are arranged more beautifully and neatly, and the staff can conveniently classify and organize the wires.

[0032] like Figure 2 and Figure 5 As shown, on the basis of Example 1, it specifically includes a protruding block 16 and a truncated cone 17. The protruding block is symmetrically arranged at one end of the tubular PTC heater 1 close to the protective cover 2, and the truncated cone 17 is symmetrically fixedly arranged on the outside of the plane where the wire inlet 4 of the protective cover 2 is located, and is fixedly matched with the protruding block 16. The protective cover 2 on the PTC heater is installed by matching the corresponding pipe openings, and its rotation cannot be restricted, which may affect the safety of the wires on the outside of the protective cover 2 at the wire outlet 12. In order to prevent its rotation, the tubular PTC electric heater is symmetrically provided with protruding blocks 16 at both ends close to the protective cover 2, and the outer side surface where the wire inlet 4 of the protective cover 2 is located is also symmetrically provided with a truncated cone 17 at the corresponding boss position. The truncated cone 17 and the protruding block 16 can be connected by screws, so that the rotation of the protective cover 2 is restricted to achieve the purpose of protecting the wires on the outside of the protective cover 2 at the wire outlet 12.

[0033] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A tubular PTC electric heater with a protective structure, characterized in that: include: A tubular PTC heater (1) and a protective cover (2), wherein the protective cover (2) is provided at one end of the tubular PTC heater (1) where the wires are laid; A pipe hole (3), a pipe hole (3) is provided at an eccentric position on the top of the protective cover (2), and the pipe hole (3) is connected to a pipe opening at one end of the tubular PTC heater (1) which is covered with electric wires; A wire inlet (4), the protective cover (2) is provided with a wire inlet (4) corresponding to a wire outlet position of the tubular PTC heater (1); A centralizing opening (5) is provided on the plane where the line inlet (4) is located; A protective shell (6), the protective shell (6) is fixedly arranged on the protective cover (2), and the protective cover (2) and the protective shell (6) are connected via a central opening (5); A wire outlet (12), the wire outlet (12) is opened on a plane of the protective shell (6) away from the centralizing port (5); A flap (7) is rotatably arranged at a larger opening outside the protective shell (6) to cover the opening, and one end of the flap (7) is fixedly connected to the protective cover (2) by means of screws; An end cover (8), which is fixedly arranged on the outside of the protective cover (2) by means of screws and is matched with the pipe hole (3); A conical rubber clamp (13), which is fixedly arranged at each outlet (12), has a three-claw shape inside the protective cover (2), and has a conical profile, and a through hole portion for the power line to pass through; A partition (14), the partition (14) is fixedly arranged in the protective cover (2) on a plane parallel to the outlet (12), and a partition (14) is fixedly arranged on the plane parallel to the outlet (12), and has threaded holes corresponding to the outlet (12) one by one; The spiral tube (15) is arranged on the partition plate (14) and is threadably matched with the threaded hole. The spiral tube (15) is shaped like a cup.

2. The tubular PTC electric heater with a protective structure according to claim 1, characterized in that: Also includes: A polished rod (9), the polished rod (9) is fixedly arranged at the upper end of the central opening (5); A movable clamp (10), the movable clamp (10) is symmetrically slidably arranged on the polished rod (9); A screw rod (11) is threadedly arranged between the ends of the two movable clamps away from the polished rod (9).

3. The tubular PTC electric heater with a protective structure according to claim 2, characterized in that: Also includes: A small clamp (18) is fixedly arranged beside the line inlet (4) far away from the central opening (5); and a large clamp (19) is fixedly arranged between a plurality of small clamps (18) far away from the central opening (5) and the central opening (5) in a symmetrical manner.

4. The tubular PTC electric heater with a protective structure according to claim 3, characterized in that: Also includes: The winding disk (20) is fixedly arranged in the protective shell (6).

5. The tubular PTC electric heater with a protective structure according to claim 4, characterized in that: Also includes: A protruding block (16) is symmetrically arranged at one end of the tubular PTC heater (1) close to the protective cover (2); The round table (17) is fixedly arranged in a bilaterally symmetrical manner on the outside of the plane where the wire inlet (4) of the protective cover (2) is located, and is fixedly matched with the protruding block (16).

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