A PTC electric heater that is easy to disassemble and assemble

Abstract

The utility model relates to a PTC electric heater that is easy to disassemble and assemble, which includes an inner tube for liquid to flow through, flanges are threadedly connected at both ends of the inner tube, a PTC heating element is installed on the peripheral side wall of the inner tube through a metal mounting seat, and the mounting seat and the inner tube are detachably connected through a mounting assembly; a mounting groove for the PTC heating element to be installed is provided on the side of the mounting seat away from the inner tube, a cover plate for limiting the PTC heating element is provided on the mounting seat, and the two sides of the PTC heating element in the thickness direction are respectively abutted against the inner wall of the mounting groove and the side of the cover plate close to the inner tube, and the cover plate is connected to the mounting seat through a fixing assembly; an outer tube is provided on the outer side of the mounting seat, and the outer tube includes two rotatably connected unit arc plates, and the ends of the two unit arc plates away from their own rotating shafts are connected through a connecting assembly. The application has the effect of facilitating the disassembly and assembly of the PTC electric heater and improving the efficiency of the inspection and replacement of the PTC heating element.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heaters, in particular to a PTC electric heater which is easy to disassemble and assemble. Background Art

[0002] Heating devices are often used in places that require long-term heating, such as energy storage power stations and solar power stations. In these places, heating devices such as PTC electric heaters are usually used for heating. The PTC heating element has a constant temperature heating characteristic. After power is turned on, the self-heating temperature rises and the resistance value increases and enters the transition zone, so that the surface temperature of the PTC heating element will remain constant, thereby heating the liquid to be heated inside the inner tube of the heating device at a constant temperature.

[0003] The PTC electric heater includes an inner tube for liquid to flow through, a PTC heating element is installed on the peripheral side wall of the inner tube through a metal mounting seat, a mounting groove for inserting the PTC heating element is provided on the side wall at one end in the length direction of the mounting seat, the mounting seat is fixed on the inner tube by gluing, and a plurality of mounting seats are arranged along the circumference of the inner tube, and the lead wire of the PTC heating element is exposed outside the mounting groove. Flanges are connected at both ends of the inner tube, and the two ends of the inner tube are sealed and docked with the corresponding pipeline through the flanges. An outer tube is arranged on the periphery of the mounting seat, and the outer tube is sleeved outside the mounting seat.

[0004] When assembling the PTC electric heater, first insert the PTC heating element into the mounting base, then glue the mounting base to the inner tube, then align the outer tube with the outer circumference of the mounting base and sleeve it outside the mounting base, and finally connect the flanges to both ends of the inner tube to complete the assembly.

[0005] When load, power outage, leakage, high voltage fluctuation and other situations occur, the PTC heater may be burned and damaged. It should be repaired and replaced in time. At this time, the staff needs to remove the entire PTC electric heater from the pipeline, then remove the flange, and then remove the outer tube, destroy the bonding layer and remove the mounting base. Finally, the damaged PTC heater is taken out from the mounting base and replaced with a new one. Then, the mounting base is glued to the surrounding side wall of the inner tube again, the outer tube is installed, and the flange is installed. The operation is cumbersome and the inspection and replacement of the PTC heater is inefficient. Utility Model Content

[0006] In order to facilitate the disassembly and assembly of the PTC electric heater and improve the efficiency of the inspection and replacement of the PTC heating element, the present application provides a PTC electric heater that is easy to disassemble and assemble.

[0007] The present application provides a PTC electric heater that is easy to disassemble and assemble, which adopts the following technical solution:

[0008] A PTC electric heater that is easy to disassemble and assemble, comprising an inner tube for liquid to flow through, flanges being threadedly connected at both ends of the inner tube, a PTC heating element being mounted on the peripheral side wall of the inner tube via a metal mounting seat, the mounting seat and the inner tube being detachably connected via a mounting assembly; a mounting groove for mounting the PTC heating element is provided on a surface of the mounting seat away from the inner tube, a cover plate for limiting the position of the PTC heating element is provided on the mounting seat, two surfaces of the PTC heating element in a thickness direction are respectively in contact with the inner wall of the mounting groove and a surface of the cover plate close to the inner tube, and the cover plate is connected to the mounting seat via a fixing assembly;

[0009] An outer tube is arranged outside the mounting seat, and the outer tube includes two rotatably connected unit arc plates, and the ends of the two unit arc plates away from their own rotating shafts are connected through a connecting component.

[0010] Preferably, each group of the mounting components includes a guide rod, and the guide rods of each group of the mounting components are arranged near both ends of the mounting seat, and the guide rods extend along the axial direction of the inner tube. A guide groove for the guide rod to pass through is provided on one surface of the mounting seat near the inner tube, and the guide groove passes through one side of the mounting seat. When the mounting seat is assembled in place, the guide rod abuts against the inner bottom wall of the guide groove.

[0011] Preferably, a connecting piece is provided on the surface of the guide rod abutting against the inner bottom wall of the guide groove, the connecting piece is umbrella-shaped, a connecting groove for the connecting piece to pass through is opened on the inner bottom wall of the guide groove, and the connecting piece is interference fit with the inner wall of the connecting groove.

[0012] Preferably, the fixing assembly includes a fixing plate, the fixing plate is connected to both sides of the cover plate in the width direction, and fixing grooves for the fixing plate to penetrate are opened on the inner walls on both sides of the mounting groove in the width direction, and the fixing groove passes through the top surface of the mounting seat;

[0013] The length of the fixing plate is smaller than that of the mounting groove. Accommodation grooves are provided at both ends of the fixing plate in the length direction. Elastic blocks are arranged in the accommodating grooves. The elastic blocks are interference-fitted with the inner wall of the fixing groove.

[0014] Preferably, the elastic block is inclined from a direction from close to the inner tube to a direction away from the inner tube toward a direction away from the fixing plate.

[0015] Preferably, the mounting groove runs through both ends of the mounting seat in the length direction, and dustproof plates are provided at both ends of the cover plate in the length direction, and the dustproof plates are located on the outside of both ends of the PTC heating element in the length direction, and the bottom surface of the dustproof plate is flush with the bottom surface of the cover plate, and the two ends of the dustproof plate in the length direction abut against the inner walls on both sides of the mounting groove in the width direction;

[0016] A clearance hole is provided on a dustproof plate close to the lead wire of the PTC heating element, and the clearance hole passes through the bottom end of the corresponding dustproof plate.

[0017] Preferably, each of the unit arc plates is connected to a connecting plate at one end away from its own rotating shaft, and the connecting assembly includes a connecting bolt and a connecting nut. The connecting bolt passes through the two connecting plates and is threadedly connected to the connecting nut. The nut of the connecting bolt and the connecting nut abut against the side of the connecting plate away from each other.

[0018] Preferably, a thermal insulation cotton sheet is provided on the inner wall of the unit arc plate, and the thermal insulation cotton sheet is connected to the corresponding unit arc plate by double-sided tape.

[0019] In summary, this application includes the following beneficial technical effects:

[0020] When installing the PTC electric heater, first put the PTC heating element into the installation groove, then put the cover plate on the installation seat, let the fixing plate penetrate into the fixing groove, and the elastic block and the inner wall of the fixing groove have an interference fit, so as to fix the cover plate, and then slide the installation seat along the axial direction of the inner tube to make the guide rod penetrate into the guide groove until the guide rod abuts against the inner bottom wall of the guide groove, and the connecting piece penetrates into the connecting groove and has an interference fit with the inner wall of the connecting groove, and finally merge the unit arc plate bonded with the thermal insulation cotton sheet, fix the connecting plate through the connecting assembly, and finally connect the flange thread to the two ends of the inner tube to complete the installation, without gluing the mounting seat, and without aligning the outer tube with the outer peripheral side of the mounting seat, the operation is fast and convenient;

[0021] When the PTC heating element needs to be inspected or replaced, there is no need to remove the entire PTC electric heater. You only need to open the outer tube and pull up the cover on the mounting base through the pull ring to inspect and replace the corresponding PTC heating element. The operation is convenient.

[0022] When disassembling the PTC electric heater, just unscrew the connecting bolts to remove the outer tube. When the PTC heating element needs to be disassembled, just open the cover, which is convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of a PTC electric heater that is easy to disassemble and assemble in an embodiment of the present application.

[0024] Figure 2 It is a schematic diagram of the exploded structure used to display the installation components in the embodiment of the present application.

[0025] Figure 3 It is a schematic cross-sectional structure diagram used to illustrate the matching relationship between the connecting member and the connecting groove in the embodiment of the present application.

[0026] Figure 4 This is a schematic diagram of the structure of the PTC heating element after the outer tube and the cover are opened in the embodiment of the present application.

[0027] Figure 5It is used to show in the embodiments of this application Figure 4 Enlarged view of point A in the middle.

[0028] Explanation of the reference numerals: 1. Inner tube; 11. Flange; 2. Mounting seat; 21. Mounting groove; 22. Cover plate; 221. Make way groove; 23. Dustproof plate; 231. Make way hole; 3. PTC heating element; 4. Mounting assembly; 41. Guide rod; 42. Guide groove; 43. Connector; 44. Connecting groove; 5. Fixing assembly; 51. Fixing plate; 52. Fixing groove; 53. Elastic block; 6. Outer tube; 61. Unit arc plate; 62. Connecting plate; 7. Connecting assembly; 71. Connecting bolt; 72. Connecting nut; 8. Pull ring; 81. Auxiliary plate; 82. Limiting plate; 9. Insulation cotton sheet. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-5 This application is described in further detail.

[0030] The embodiment of the present application discloses a PTC electric heater which is easy to assemble and disassemble.

[0031] Reference Figure 1-5 The PTC electric heater that is easy to disassemble and assemble comprises an inner tube 1 for liquid to flow through, flanges 11 are threadedly connected at both ends of the inner tube 1, a PTC heating element 3 is mounted on the peripheral side wall of the inner tube 1 through a metal mounting seat 2, and the mounting seat 2 and the inner tube 1 are detachably connected through a mounting assembly 4. A mounting groove 21 for mounting the PTC heating element 3 is provided on the side of the mounting seat 2 away from the inner tube 1, and a cover plate 22 for limiting the PTC heating element 3 is provided on the mounting seat 2. The two sides of the PTC heating element 3 in the thickness direction are respectively in contact with the inner wall of the mounting groove 21 and the side of the cover plate 22 close to the inner tube 1, and the cover plate 22 is connected to the mounting seat 2 through a fixing assembly 5.

[0032] An outer tube 6 is disposed outside the mounting base 2 . The outer tube 6 includes two rotatably connected unit arc plates 61 . The ends of the two unit arc plates 61 away from their own rotation axes are connected through a connecting assembly 7 .

[0033] Each group of mounting components 4 includes a guide rod 41. The guide rod 41 of each group of mounting components 4 is arranged near both ends of the mounting seat 2. The guide rod 41 extends along the axial direction of the inner tube 1. A guide groove 42 for the guide rod 41 to penetrate is opened on the side of the mounting seat 2 close to the inner tube 1. The guide groove 42 runs through one side of the mounting seat 2. When the mounting seat 2 is assembled in place, the guide rod 41 abuts against the inner bottom wall of the guide groove 42.

[0034] A connecting piece 43 is provided on the surface of the guide rod 41 that abuts against the inner bottom wall of the guide groove 42. The connecting piece 43 is umbrella-shaped. A connecting groove 44 for the connecting piece 43 to penetrate is opened on the inner bottom wall of the guide groove 42. The connecting piece 43 is interference fit with the inner wall of the connecting groove 44.

[0035] The fixing assembly 5 includes a fixing plate 51, which is connected to both sides of the cover plate 22 in the width direction. The inner walls of both sides of the mounting groove 21 in the width direction are provided with fixing grooves 52 for the fixing plate 51 to penetrate, and the fixing grooves 52 penetrate the top surface of the mounting seat 2. The length of the fixing plate 51 is less than the length of the mounting groove 21, and the two ends of the fixing plate 51 in the length direction are provided with receiving grooves, and elastic blocks 53 are arranged in the receiving grooves. The elastic blocks 53 are inclined from the direction close to the inner tube 1 to the direction away from the inner tube 1, so that the elastic blocks 53 can enter the fixing groove 52. The elastic blocks 53 are made of rubber parts, and the elastic blocks 53 are interference fit with the inner wall of the fixing groove 52. After the fixing plate 51 is inserted into the fixing groove 52, the cover plate 22 is fixed by the interference fit between the elastic blocks 53 and the fixing groove 52.

[0036] The mounting groove 21 passes through both ends of the mounting seat 2 in the length direction, and dustproof plates 23 are provided at both ends of the cover plate 22 in the length direction. The dustproof plates 23 are located outside the two ends of the PTC heating element 3 in the length direction, and the dustproof plates 23 limit the position of the PTC heating element 3. The bottom surface of the dustproof plate 23 is flush with the bottom surface of the cover plate 22, and the two ends of the dustproof plate 23 in the length direction abut against the inner walls of both sides of the mounting groove 21 in the width direction. A dustproof plate 23 close to the lead of the PTC heating element 3 is provided with a clearance hole 231 for the lead of the PTC heating element 3 to make way, and the clearance hole 231 passes through the bottom end of the corresponding dustproof plate 23.

[0037] A clearance groove 221 is provided on the top surface of the cover plate 22, and the clearance groove 221 is arranged near the two ends of the length direction of the cover plate 22. A pull ring 8 is arranged in each clearance groove 221, and the pull ring 8 is arc-shaped. The two ends of the pull ring 8 are rotatably connected to the inner wall of the clearance groove 221 through an auxiliary plate 81, and the auxiliary plate 81 is fixedly connected to the inner wall of the clearance groove 221. The two ends of the pull ring 8 are rotatably connected to the auxiliary plate 81. With the help of the pull ring 8, it is convenient to pull the cover plate 22 away from the mounting seat 2.

[0038] A limiting plate 82 is arranged on the inner bottom wall of the clearance groove 221. The limiting plate 82 is made of rubber. The limiting plate 82 is arranged on both sides of the pull ring 8 in the thickness direction. The middle part of the pull ring 8 in the length direction is clamped between the two limiting plates 82. When the pull ring 8 is not in use, the pull ring 8 is rotated to be inserted between the limiting plates 82. The two limiting blocks clamp the pull ring 8 to prevent the pull ring 8 from rotating under the action of gravity to expose the outside of the clearance groove 221, affecting the merging of the two unit arc plates 61 of the outer tube 6.

[0039] One end of each unit arc plate 61 away from its own rotation axis is fixedly connected to a connecting plate 62 . Three groups of connecting components 7 are arranged along the length direction of the connecting plate 62 . The three groups of connecting components 7 are respectively located at both ends and the middle of the connecting plate 62 .

[0040] The connecting assembly 7 includes a connecting bolt 71 and a connecting nut 72. The connecting bolt 71 passes through the two connecting plates 62 and is threadedly connected to the connecting nut 72. The nut of the connecting bolt 71 and the connecting nut 72 abut against the side of the connecting plate 62 that is away from each other.

[0041] A heat-insulating cotton sheet 9 is arranged on the inner wall of the unit arc plate 61 . The heat-insulating cotton sheet 9 is connected to the corresponding unit arc plate 61 by double-sided adhesive. The arrangement of the heat-insulating cotton sheet 9 reduces heat loss.

[0042] The implementation principle of a PTC electric heater that is easy to disassemble and assemble in the embodiment of the present application is:

[0043] When installing the PTC electric heater, first put the PTC heating element 3 into the installation groove 21, then cover the cover plate 22 on the installation seat 2, so that the fixing plate 51 is inserted into the fixing groove 52, and the elastic block 53 is interference fit with the inner wall of the fixing groove 52, so as to fix the cover plate 22, and then the installation seat 2 is slid along the axial direction of the inner tube 1 to make the guide rod 41 penetrate into the guide groove 42 until the guide rod 41 abuts against the inner bottom wall of the guide groove 42, and the connecting piece 43 penetrates into the connecting groove 44 and is interference fit with the inner wall of the connecting groove 44, and finally the unit arc plate 61 bonded with the thermal insulation cotton sheet 9 is merged, and the connecting plate 62 is fixed by the connecting assembly 7, and finally the flange 11 is threadedly connected to the two ends of the inner tube 1 to complete the installation, without gluing the installation seat 2, and without aligning the outer tube 6 with the outer peripheral side of the installation seat 2, and the operation is fast and convenient;

[0044] When the PTC heating element 3 needs to be inspected or replaced, there is no need to remove the entire PTC electric heater. It is only necessary to open the outer tube 6 and pull up the cover plate 22 on the mounting seat 2 through the pull ring 8 to inspect and replace the corresponding PTC heating element 3. The operation is convenient.

[0045] When the PTC electric heater is disassembled, the outer tube 6 can be disassembled by unscrewing the connecting bolts 71 . When the PTC heating element 3 needs to be disassembled, only the cover plate 22 needs to be opened, which is convenient to operate.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A PTC electric heater that is easy to disassemble and assemble, characterized in that: The invention comprises an inner tube (1) for liquid to flow through, flanges (11) are threadedly connected at both ends of the inner tube (1), a PTC heating element (3) is mounted on the peripheral side wall of the inner tube (1) via a metal mounting seat (2), and the mounting seat (2) and the inner tube (1) are detachably connected via a mounting assembly (4); a mounting groove (21) for mounting the PTC heating element (3) is provided on a surface of the mounting seat (2) away from the inner tube (1), a cover plate (22) for limiting the position of the PTC heating element (3) is provided on the mounting seat (2), two surfaces of the PTC heating element (3) in the thickness direction are respectively in contact with the inner wall of the mounting groove (21) and a surface of the cover plate (22) close to the inner tube (1), and the cover plate (22) is connected to the mounting seat (2) via a fixing assembly (5); An outer tube (6) is arranged on the outside of the mounting seat (2), and the outer tube (6) comprises two rotatably connected unit arc plates (61), and the ends of the two unit arc plates (61) away from their own rotation axes are connected via a connecting assembly (7).

2. The easily disassembled PTC electric heater according to claim 1, characterized in that: Each group of the mounting components (4) comprises a guide rod (41), and the guide rod (41) of each group of the mounting components (4) is arranged near the two ends of the mounting seat (2), and the guide rod (41) extends along the axial direction of the inner tube (1). A guide groove (42) for the guide rod (41) to penetrate is provided on a surface of the mounting seat (2) near the inner tube (1), and the guide groove (42) passes through one side of the mounting seat (2). When the mounting seat (2) is assembled in place, the guide rod (41) abuts against the inner bottom wall of the guide groove (42).

3. The PTC electric heater that is easy to assemble and disassemble according to claim 2 is characterized in that: A connecting piece (43) is provided on one side of the guide rod (41) that abuts against the inner bottom wall of the guide groove (42); the connecting piece (43) is umbrella-shaped; a connecting groove (44) for the connecting piece (43) to penetrate is provided on the inner bottom wall of the guide groove (42); the connecting piece (43) and the inner wall of the connecting groove (44) are interference fit.

4. The PTC electric heater that is easy to assemble and disassemble according to claim 1 is characterized in that: The fixing assembly (5) comprises a fixing plate (51), the fixing plate (51) being connected to two sides of the cover plate (22) in the width direction, and fixing grooves (52) for the fixing plate (51) to penetrate are provided on the inner walls of the two sides of the mounting groove (21) in the width direction, and the fixing grooves (52) penetrate the top surface of the mounting seat (2); The length of the fixing plate (51) is smaller than the length of the mounting groove (21), and receiving grooves are provided at both ends of the length direction of the fixing plate (51). Elastic blocks (53) are arranged in the receiving grooves, and the elastic blocks (53) are interference-fitted with the inner wall of the fixing groove (52).

5. The easily disassembled PTC electric heater according to claim 4, characterized in that: The elastic block (53) is inclined from a direction close to the inner tube (1) to a direction away from the inner tube (1) toward a direction away from the fixing plate (51).

6. The easily disassembled PTC electric heater according to claim 1, characterized in that: The mounting groove (21) passes through both ends of the mounting seat (2) in the length direction, and dustproof plates (23) are provided at both ends of the cover plate (22) in the length direction. The dustproof plates (23) are located on the outside of both ends of the PTC heating element (3) in the length direction, and the bottom surface of the dustproof plate (23) is flush with the bottom surface of the cover plate (22). Both ends of the dustproof plate (23) in the length direction abut against the inner walls of both sides of the mounting groove (21) in the width direction. A dustproof plate (23) close to the lead wire of the PTC heating element (3) is provided with a clearance hole (231), and the clearance hole (231) passes through the bottom end of the corresponding dustproof plate (23).

7. The easily disassembled PTC electric heater according to claim 1, characterized in that: A clearance groove (221) is provided on the top surface of the cover plate (22), a pull ring (8) is provided in the clearance groove (221), the pull ring (8) is arc-shaped, two ends of the pull ring (8) are rotatably connected to the inner wall of the clearance groove (221) through an auxiliary plate (81), the auxiliary plate (81) is fixedly connected to the inner wall of the clearance groove (221), and the two ends of the pull ring (8) are rotatably connected to the auxiliary plate (81).

8. The easily disassembled PTC electric heater according to claim 7, characterized in that: A limiting plate (82) is arranged on the inner bottom wall of the clearance groove (221), and the limiting plate (82) is made of a rubber piece. The limiting plates (82) are arranged on both sides of the pull ring (8) in the thickness direction, and the middle part of the pull ring (8) in the length direction is sandwiched between the two limiting plates (82).

9. The easily disassembled PTC electric heater according to claim 1, characterized in that: Each of the unit arc plates (61) is connected to a connecting plate (62) at one end away from its own rotating shaft. The connecting assembly (7) comprises a connecting bolt (71) and a connecting nut (72). The connecting bolt (71) passes through two connecting plates (62) and is threadedly connected to the connecting nut (72). The nut of the connecting bolt (71) and the connecting nut (72) are in contact with a side of the connecting plate (62) away from each other.

10. The easily disassembled PTC electric heater according to claim 1, characterized in that: A heat-insulating cotton sheet (9) is provided on the inner wall of the unit arc plate (61), and the heat-insulating cotton sheet (9) is connected to the corresponding unit arc plate (61) by means of double-sided adhesive.

Images