Electric heating tube fixing structure of electric heater

Abstract

The utility model discloses an electric heating tube fixing structure of an electric heater, which relates to the technical field of electric heating equipment and comprises an electric heater shell and a butt joint tube, one end of the butt joint tube penetrates through the middle of one end of the electric heater shell, a connecting flange is arranged on one side of the butt joint tube, and a wiring cylinder is fixedly connected to the middle of the connecting flange. A plurality of electric heating tubes are electrically connected to the middle of the wiring cylinder, a top strip is fixedly connected to the top of one side wall of the connecting flange, a bottom strip is fixedly connected to the bottom of one side wall of the connecting flange, and a plurality of second balls are movably embedded in the bottom end of the bottom strip. By arranging a series of structures, the electric heating tube can be kept in a horizontal state when being pushed into the shell of the electric heater, so that the probability that the electric heating tube is damaged due to friction and collision with the inner wall of the shell of the electric heater is reduced, and the probability that the shell is electrified is reduced; and the potential safety hazard of electric shock caused by contact with the electric heater shell is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electric heating equipment technology, specifically to a heating element fixing structure for an electric heater. Background Technology

[0002] An electric heater is an electric heating device. According to the heating medium, it is divided into liquid electric heaters and gas electric heaters. The heat source of an electric heater is usually an electric heating tube. The electric heating tube and the electric heater are usually detachable structures. In use, they need to be assembled and fixed by a fixing structure to realize the normal use of the electric heater.

[0003] However, when installing the heating element of an existing pipe-type liquid electric heater, it is usually necessary to push the heating element horizontally into the pipe-type outer shell of the heater from one end. During this process, due to the relatively long length of the heating element, it is not easy to keep it horizontal while pushing it into the heater. This makes it easy for the heating element to rub and collide with the inner wall of the outer shell, resulting in damage due to friction and collision. In addition, after the heating element is installed, the outer shell of the heater is usually grounded, but the heating element is usually not grounded. In the event of leakage, the current will be conducted to the outer shell and then to the ground. If the outer shell is accidentally touched at this time, there is a risk of electric shock. Utility Model Content

[0004] The purpose of this invention is to provide a heating element fixing structure for an electric heater to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a heating element fixing structure for an electric heater, comprising an electric heater housing and a connecting pipe, one end of which penetrates the middle of one end of the electric heater housing, a connecting flange on one side of the connecting pipe, a terminal block fixedly connected to the middle of the connecting flange, multiple heating elements electrically connected to the middle of the terminal block, a top strip fixedly connected to the top of one side wall of the connecting flange, a bottom strip fixedly connected to the bottom of one side wall of the connecting flange, multiple second ball bearings movably embedded at the bottom end of the bottom strip, a vertical plate fixedly connected to the bottom end of the connecting flange, multiple first ball bearings movably embedded at the bottom end of the vertical plate, a pull rod fixedly connected to the middle of the vertical plate, and a grounding electrode embedded in the middle of the bottom end of the vertical plate.

[0006] Preferably, the outer wall of the connecting flange has multiple through holes, and the connecting flange is fixedly connected to the flange at the other end of the connecting pipe through the through holes through which the bolts pass.

[0007] Preferably, an insulating cover is fixedly connected to the outer wall of the junction box.

[0008] Preferably, a first circular plate is fixedly connected to the middle of the bottom strip, and a second circular plate is fixedly connected to the end of the bottom strip away from the connecting flange.

[0009] Preferably, the first and second circular plates each have multiple circular holes in their middle portions, and clips are embedded in the inner walls on both sides of the circular holes. The heating element is movably connected to the first and second circular plates through the circular holes.

[0010] Preferably, the top ends of the first and second circular plates are fixedly connected to the bottom end of the top strip, and the heating element is movably connected to the outer shell of the electric heater through the first and second circular plates.

[0011] Preferably, the bottom strip is slidably connected to the connecting pipe via a first ball bearing.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The heating element fixing structure of this electric heater, through the bottom strip and the second ball bearing, allows the bottom of the heating element to slide along the inner wall of the connecting tube via the second ball bearing at the bottom end of the bottom strip when the heating element is pushed into the outer shell of the electric heater. Combined with the support and limiting of the heating element by the top strip, the first circular plate and the second circular plate, the heating element can be kept horizontal when pushed into the outer shell of the electric heater, thereby reducing the probability of damage to the heating element due to friction and collision with the inner wall of the outer shell of the electric heater.

[0014] 2. The heating element fixing structure of this electric heater, through the vertical plate, pull rod, first ball bearing and grounding electrode, allows the bottom of the heating element's wiring terminal to guide the current to the grounding electrode through the metal vertical plate, which serves as the lead wire, and then guide the current to the ground through the grounding electrode at the bottom of the vertical plate. This ensures that when the heating element leaks current, the current will be directly guided to the ground without passing through the outer casing, thereby reducing the probability of the outer casing becoming electrified and reducing the safety hazard of electric shock due to contact with the outer casing of the electric heater. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the vertical plate and tie rod structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the grounding electrode and clip structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the top and bottom strips of this utility model.

[0019] In the diagram: 1. Electric heater housing; 2. Connecting pipe; 3. Connecting flange; 4. Terminal block; 5. Vertical plate; 6. Tie rod; 7. First ball bearing; 8. Bottom strip; 9. Second ball bearing; 10. First circular plate; 11. Second circular plate; 12. Top strip; 13. Electric heating element; 14. Circular hole; 15. Clip; 16. Grounding electrode. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figures 1 to 4As shown, the electric heater's heating element fixing structure in this embodiment includes an electric heater housing 1 and a connecting pipe 2. One end of the connecting pipe 2 passes through the middle of one end of the electric heater housing 1. A connecting flange 3 is provided on one side of the connecting pipe 2. A wiring tube 4 is fixedly connected to the middle of the connecting flange 3. Multiple heating elements 13 are electrically connected to the middle of the wiring tube 4. A top strip 12 is fixedly connected to the top of one side wall of the connecting flange 3. A bottom strip 8 is fixedly connected to the bottom of one side wall of the connecting flange 3. Multiple second ball bearings 9 are movably embedded at the bottom end of the bottom strip 8. A vertical plate 5 is fixedly connected to the bottom end of the connecting flange 3. Multiple first ball bearings 7 are movably embedded at the bottom end of the vertical plate 5. A pull rod 6 is fixedly connected to the middle of the vertical plate 5. A grounding electrode 16 is embedded in the middle of the bottom end of the vertical plate 5.

[0024] Specifically, the connecting pipe 2 and the electric heater housing 1 are an integral structure. The heating element 13 is fixed to the flange on the connecting pipe 2 via the connecting flange 3. The heating element 13 is a U-shaped tube. The bottom strip 8 transfers the weight of the heating element 13 to the connecting pipe 2, allowing the connecting pipe 2 to support the heating element 13. The second ball bearing 9 converts sliding friction into rolling friction when the bottom strip 8 is pushed in along the bottom of the inner wall of the connecting pipe 2, making it easier for the heating element 13 to be pushed into the electric heater housing, thereby reducing the risk of the heating element 13 protruding when pushed into the electric heater housing 1. To reduce the probability of friction and collision, the vertical plate 5 has an "L" shaped cross-section, and the bottom of the vertical plate 5 is grounded by the first ball bearing 7. This allows the vertical plate 5 to support the connecting flange 3 when the heating element 13 is pushed into the connecting pipe 2 along with the connecting flange 3, making it easier for the heating element 13 to be pushed into the connecting pipe 2 and fixed to the electric heater. The first ball bearing 7 is made of a metal material with good conductivity, and the pull rod 6 is made of a material with good insulation properties. The grounding electrode 16 can directly divert the current when the heating element 13 leaks to the ground, thereby reducing the probability that the outer casing will become electrified when the heating element 13 leaks.

[0025] Furthermore, the outer wall of the connecting flange 3 is provided with multiple through holes. The connecting flange 3 is fixedly connected to the flange at the other end of the connecting pipe 2 through the through holes through which the bolts pass. The function of the connecting flange 3 is to enable the heating element 13 to be fixedly assembled with the connecting pipe 2, thereby realizing the fixation of the heating element 13 and the electric heater housing 1.

[0026] Furthermore, an insulating cover is fixedly connected to the outer wall of the junction box 4. The function of the insulating cover is to make the outer wall of the junction box 4 less likely to become electrified, thereby reducing the probability of electric shock.

[0027] Furthermore, a first circular plate 10 is fixedly connected to the middle of the bottom strip 8, and a second circular plate 11 is fixedly connected to the end of the bottom strip 8 away from the connecting flange 3. The first circular plate 10 and the second circular plate 11 have the same diameter. Their function is to limit the end and middle of the heating tube 13, so that the weight of the heating tube 13 can be distributed to the top strip 12 and the bottom strip 8 through the first circular plate 10 and the second circular plate 11, thereby improving the stability of the connection between the heating tube 13 and the connecting flange 3.

[0028] Furthermore, multiple circular holes 14 are provided in the middle of the first circular plate 10 and the second circular plate 11. Clips 15 are embedded in the inner walls on both sides of the circular holes 14. The heating element 13 is movably connected to the first circular plate 10 and the second circular plate 11 through the circular holes 14 respectively. The function of the clips 15 is to enable the first circular plate 10 and the second circular plate 11 to better connect with the heating element 13, thereby helping the heating element 13 to maintain a stable state on the connecting flange 3.

[0029] Furthermore, the top ends of the first circular plate 10 and the second circular plate 11 are fixedly connected to the bottom end of the top strip 12. The electric heating tube 13 is movably inserted and connected to the electric heater housing 1 through the first circular plate 10 and the second circular plate 11. The top strip 12 can increase the stability of the connection between the first circular plate 10 and the second circular plate 11 and the electric heating tube, thereby facilitating the pushing of the electric heating tube 13 into the connecting tube 2.

[0030] Furthermore, the bottom strip 8 is slidably connected to the connecting tube 2 via the first ball bearing 7, making the bottom strip 8 slide more smoothly along the inside of the connecting tube 2, thereby facilitating the pushing of the heating element 13 into the electric heater housing 1 and reducing the friction and collision between the heating element 13 and the inner wall of the electric heater housing 1.

[0031] The method of use in this embodiment is as follows: Before pushing the heating element 13 into the interior of the electric heater housing 1, the heating element 13 needs to be inserted into the round holes 14 on the second round plate 11 and the first round plate 10 in sequence, so that the end of the heating element 13 is electrically connected to the wiring tube 4. At the same time, the clamping piece 15 in the round hole 14 clamps the heating element 13 in the round hole 14, so that the heating element 13 is fixed to the connecting flange 3 through the first round plate 10 and the second round plate 11. Then, the bottom strip 8 and the second round plate 11 can be pushed into the connecting pipe 2 first. Then, the connecting flange 3 is pushed by the pull rod 6, so that the second ball 9 at the bottom end of the bottom strip 8 rolls along the bottom of the inner wall of the connecting pipe 2 in sequence, so that the heating element 13 can be moved along with the connecting pipe 2. The first circular plate 10 and the second circular plate 11 slide into the connecting pipe 2. At the same time, when the connecting flange 3 is pushed, the vertical plate 5 at the bottom of the connecting flange 3 will roll along the ground through the first ball 7, so that the vertical plate 5 slides along the ground. When the connecting flange 3 is in contact with the flange on the connecting pipe 2, the electric heating tube 13 is connected to the connecting pipe 2. Then, the two flanges can be connected and fixed with bolts. At the same time, when there is a leakage at the junction box 4 of the electric heating tube 13, the current will be directly conducted to the vertical plate 5 through the connecting flange 3, and conducted to the ground through the grounding electrode 16 at the bottom of the vertical plate 5, so that the current is not easy to flow through the electric heater shell 1, and the electric heater shell 1 is not easy to become electrified.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An electric heating tube fixing structure of an electric heater, comprising an electric heater housing (1) and a butt joint pipe (2), characterized in that: One end of the butt joint pipe (2) penetrates the middle of one end of the electric heater shell (1), one side of the butt joint pipe (2) is provided with a connecting flange (3), the middle of the connecting flange (3) is fixedly connected with a wiring drum (4), the middle of the wiring drum (4) is electrically connected with a plurality of electric heating pipes (13), the top of one side wall of the connecting flange (3) is fixedly connected with a top strip (12), the bottom of one side wall of the connecting flange (3) is fixedly connected with a bottom strip (8), the bottom end of the bottom strip (8) is movably embedded with a plurality of second rolling balls (9), the bottom end of the connecting flange (3) is fixedly connected with a vertical plate (5), the bottom end of the vertical plate (5) is movably embedded with a plurality of first rolling balls (7), the middle of the vertical plate (5) is fixedly connected with a pull rod (6), the middle of the bottom end of the vertical plate (5) is embedded with a grounding electrode (16).

2. An electrical heating tube fixing structure of an electrical heater according to claim 1, characterized in that: The outer wall of the connecting flange (3) is provided with a plurality of through holes, and the connecting flange (3) is fixedly connected with the flange plate at the other end of the butt joint pipe (2) through the through holes of the bolts.

3. The electric tube fixing structure of an electric heater according to claim 1, characterized in that: The outer wall of the wiring drum (4) is fixedly connected with an insulating cover.

4. The electric tube fixing structure of an electric heater according to claim 1, characterized in that: The middle of the bottom strip (8) is fixedly connected with a first circular plate (10), and the end of the bottom strip (8) away from the connecting flange (3) is fixedly connected with a second circular plate (11).

5. An electrical heating tube fixing structure of an electrical heater according to claim 4, characterized in that: The middle of the first circular plate (10) and the second circular plate (11) is provided with a plurality of circular holes (14), and the inner walls on both sides of the circular holes (14) are embedded with clamping pieces (15), and the electric heating pipes (13) are movably connected with the first circular plate (10) and the second circular plate (11) through the circular holes (14) respectively.

6. An electrical heating tube fixing structure of an electrical heater according to claim 5, characterized in that: The top end of the first circular plate (10) and the second circular plate (11) is fixedly connected with the bottom end of the top strip (12), and the electric heating pipes (13) are movably connected with the electric heater shell (1) through the first circular plate (10) and the second circular plate (11).

7. The electric tube fixing structure of an electric heater according to claim 1, characterized in that: The bottom strip (8) is slidably connected with the butt joint pipe (2) through the first rolling balls (7).

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