A heating tube resistance box

Abstract

The present invention relates to a heating tube resistor box, belonging to the technical field of heaters. A heating tube resistor box comprises a protective box and a plurality of heating tube resistor assemblies located inside the protective box. The plurality of heating tube resistor assemblies are mutually conductively and electromagnetically matched. A heating tube resistor assembly comprises a straight heating tube resistor and a semi-arc heating tube resistor. The straight heating tube resistor and the semi-arc heating tube resistor are integrally arranged. A first connecting mechanism is arranged at one end of the straight heating tube resistor, and a second connecting mechanism is arranged at one end of the semi-arc heating tube resistor. The first connecting mechanism is conductively and electromagnetically matched with the second connecting mechanism at one end of an adjacent semi-arc heating tube resistor. The present invention can connect a plurality of heating tube resistor assemblies together through the conductive electromagnetically matched between the first connecting mechanism and the second connecting mechanism. When one of the heating tube resistor assemblies is damaged, only the corresponding heating tube resistor assembly needs to be replaced, thereby reducing the use cost.

Description

Technical Field

[0001] The invention belongs to the technical field of heaters, and in particular relates to a heating tube resistance box. Background Art

[0002] An electric water heater is a water heater that uses electricity as energy for heating. The power of an electric water heater is generally 900 to 7500W. The heating tube is a key component of the electric water heater. The electric heating tube uses a metal tube as the outer shell, and electric heating alloy wires (nickel-chromium, iron-chromium alloy) are evenly distributed along the central axis of the tube. The gaps are filled and compacted with magnesium oxide sand with good insulation and thermal conductivity, and the two ends of the tube are sealed with silicone or ceramic.

[0003] For example, in the Chinese utility model patent with the announcement number CN206160768U and the name of an S-shaped tube heater, there are three heating tube groups, which are arranged in parallel. Although the above-mentioned prior art can improve the heating effect, the general heating tube adopts a relatively long tubular structure. Since the interior of the heating tube is provided with an electric heating alloy wire, it is easy to expand due to heat after working for a long time, causing the electric heating alloy wire to break, and then the entire relatively long tubular structure is scrapped, so that the service life of the heating tube is reduced. In order to divide a relatively long tubular structure into multiple pieces and assemble them into one, a heating tube resistance box is now needed. Summary of the invention

[0004] The purpose of the present invention is to provide a heating tube resistance box with simple structure and reasonable design in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A heating tube resistor box comprises a protective box and a plurality of heating tube resistor assemblies located inside the protective box, wherein the plurality of heating tube resistor assemblies are mutually electromagnetically attracted to cooperate with each other, and one of the heating tube resistor assemblies comprises a straight heating tube resistor and a semi-arc heating tube resistor, wherein the straight heating tube resistor and the semi-arc heating tube resistor are integrally arranged, a first connecting mechanism is arranged at one end of the straight heating tube resistor, a second connecting mechanism is arranged at one end of the semi-arc heating tube resistor, and the first connecting mechanism is electromagnetically attracted to cooperate with the second connecting mechanism at one end of an adjacent semi-arc heating tube resistor.

[0007] As a further optimization scheme of the present invention, the first connecting mechanism includes a fixed cylinder fixedly arranged at one end of the linear heating tube resistor, a conductive slide is slidably arranged on the inner side of the fixed cylinder, a plurality of first compensation springs fixedly connected to the fixed cylinder are fixedly arranged on one side of the conductive slide, a conductive slip ring sliding through the fixed cylinder is fixedly arranged on the other side of the conductive slide, and a first magnet is fixedly arranged at one end of the conductive slip ring.

[0008] As a further optimization solution of the present invention, the second connecting mechanism includes a fixing plate fixedly arranged at one end of the semi-arc heating tube resistor, and a second magnet cooperating with the first magnet is fixedly arranged on one side of the fixing plate.

[0009] As a further optimization scheme of the present invention, a resistance wire is arranged at the inner center of the linear heating tube resistor and the semi-arc heating tube resistor, and the inner side of the linear heating tube resistor and the semi-arc heating tube resistor is filled with an insulating heat-conductive filler wrapped around the outside of the resistance wire.

[0010] As a further optimization scheme of the present invention, one end of the resistance wire in the linear heating tube resistor is fixedly connected to a conductive plug-in sleeve, a central groove is provided on the inner side of the conductive plug-in sleeve, and one end of the resistance wire in the semi-arc heating tube resistor is fixedly connected to a conductive plug-in sleeve, and the conductive plug-in sleeve is slidably inserted into the central groove at one end of the conductive plug-in sleeve.

[0011] As a further optimization scheme of the present invention, a conductive rod is fixedly arranged on the inner side of the conductive slip ring, a conductive contact plate is fixedly arranged at one end of the conductive rod and is slidably fitted with the outer side of the conductive insert, and a guide groove cooperating with the conductive rod is opened on the inner side of the fixed tube.

[0012] As a further optimization scheme of the present invention, an alarm is fixedly provided at one end of the fixed cylinder, a conductive hole is opened on the conductive slide plate, a conductive column electrically connected to the alarm and passing through the conductive hole is provided on the inner side of the fixed cylinder, and two conductive contacts are fixedly provided on the conductive column, which are respectively located on both sides of the conductive hole and contact and cooperate with the conductive hole.

[0013] As a further optimization scheme of the present invention, the straight heating tube resistors and the semi-arc heating tube resistors of the heating tube resistor assembly are connected end to end to form a continuous "S" shaped structure, and a compensation plate is provided on the outer side of the "S" shaped structure. The two ends of the compensation plate are installed inside the protective box by screws.

[0014] As a further optimization scheme of the present invention, the protective box adopts a cavity structure with one end open and the rest sealed, each surface of the protective box is provided with a plurality of heat dissipation holes, the compensation plate is provided with a limiting groove for clamping with the linear heating tube resistance, the upper side of the compensation plate is penetrated by a sliding groove connected with the limiting groove, and compensation fasteners for compensating for the linear heating tube resistance are provided on both sides of the limiting groove.

[0015] As a further optimization scheme of the present invention, the compensation fastener includes a compensation groove opened on the compensation plate, a slide plate is slidably arranged on the inner side of the compensation groove, a second compensation spring fixedly connected to the inner side of the compensation groove is fixedly arranged on one side of the slide plate, and a sliding rod is fixedly arranged on the other side of the slide plate, which slides through the compensation groove and extends to the inside of the limiting groove, and a buckle plate is fixedly arranged on one end of the sliding rod, which is pressed tightly against one side of the linear heating tube resistor.

[0016] The beneficial effects of the present invention are:

[0017] 1. In the present invention, by sliding the conductive plug at one end of a semi-arc-shaped heating tube resistor into the central groove of the conductive plug at one end of another linear heating tube resistor, and so on, a plurality of integrally formed linear heating tube resistors and semi-arc-shaped heating tube resistors can be connected together, and through the conduction between the conductive plug and the conductive plug, a plurality of heating tube resistor assemblies are interconnected to form a whole. When the resistance wire inside one of the heating tube resistor assemblies is disconnected due to long-term heating, only the corresponding heating tube resistor assembly needs to be replaced, and the entire heating tube resistor assembly does not need to be scrapped, thereby reducing the use cost and increasing the service life of the heating tube resistor assembly.

[0018] 2. In the present invention, by sliding the conductive plug at one end of a semi-arc-shaped heating tube resistor into the central groove of the conductive plug at one end of another linear heating tube resistor, the first magnet at one end of the linear heating tube resistor can be magnetically matched with the second magnet at one end of the other semi-arc-shaped heating tube resistor, so that the two adjacent heating tube resistor components are connected together, thereby improving the time connectivity between the two. In addition, since one side of the first magnet is slidably arranged on the conductive slip ring on the inner side of the fixed tube, the sliding of the conductive slip ring pulls the first compensation spring to expand and contract, and the attraction between the second magnet and the first magnet can drive the conductive slip ring to slide on the inner side of the fixed tube, so that the two adjacent heating tube resistor components are connected together. When the heating tube resistor assembly is heated and expanded, compensation is performed in the length direction to prevent the resistance wire inside the semi-arc heating tube resistor and the straight heating tube resistor from breaking during long-term heating, thereby increasing the service life of the heating tube resistor assembly; and when the heating tube resistor assembly is heated and expanded, the attraction between the second magnet and the first magnet drives the conductive slip ring to slide on the inside of the fixed tube, and at the same time, the conductive slide plate at one end of the conductive slip ring slides on the inside of the fixed tube, so that the conductive hole on the conductive slide plate fits with the conductive contact for conduction, and then the conduction of the conductive column causes the alarm to sound an alarm to remind personnel to operate and avoid the breakage of the heating tube resistor assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall internal structure of the resistance box of the present invention;

[0020] Figure 2It is a schematic diagram of the overall structure of the heating tube resistor and the compensation plate of the present invention;

[0021] Figure 3 This is a schematic diagram of the overall structure of four heating tube resistors assembled in the present invention;

[0022] Figure 4 It is a schematic diagram of the overall structure of two heating tube resistors assembled according to the present invention;

[0023] Figure 5 It is a schematic diagram of the first overall structure of a heating tube resistor of the present invention;

[0024] Figure 6 It is a second overall structural schematic diagram of a heating tube resistor of the present invention;

[0025] Figure 7 It is a third overall structural schematic diagram of a heating tube resistor of the present invention;

[0026] Figure 8 The present invention Figure 5 Enlarged view of point A in the middle;

[0027] Fig. 9 The present invention Figure 5 Enlarged view of point B in the middle;

[0028] Fig.10 The present invention Figure 6 Enlarged view of point C in the middle;

[0029] Fig.11 The present invention Figure 7 Enlarged view of point D in the middle;

[0030] Fig.12 The present invention Figure 4 Enlarged view of point E in the middle;

[0031] Fig.13 The present invention Figure 2 Enlarged view of point F in the middle.

[0032] In the figure: 1, protection box; 101, insulating heat conductive filler; 102, resistance wire; 2, heat dissipation hole; 3, compensation plate; 4, heating tube resistance assembly; 401, linear heating tube resistance; 402, semi-arc heating tube resistance; 5, limit groove; 6, first connecting mechanism; 601, fixing cylinder; 602, conductive slip ring; 603, first magnet; 604, conductive slide plate; 605, first compensation spring; 606, alarm; 607, Conductive column; 608, conductive hole; 609, conductive contact; 610, conductive plug; 611, center groove; 612, guide groove; 613, conductive rod; 614, conductive contact plate; 7, second connecting mechanism; 701, fixing plate; 702, second magnet; 703, conductive plug; 8, compensation fastener; 801, buckle plate; 802, slide bar; 803, slide plate; 804, compensation groove; 805, second compensation spring; 9, slide groove. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0034] Example 1: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.12As shown, a heating tube resistance box includes a protection box 1. The protection box 1 can be made of transparent material. A plurality of heating tube resistance assemblies 4 are arranged inside the protection box 1. The plurality of heating tube resistance assemblies 4 are mutually conductive and electromagnetically attracted. This embodiment is described by taking a heating tube resistance assembly 4 as an example. A heating tube resistance assembly 4 includes a linear heating tube resistance 401 and a semi-arc heating tube resistance 402. The semi-arc heating tube resistance 402 adopts a semicircular structure. The inner centers of the linear heating tube resistance 401 and the semi-arc heating tube resistance 402 are both provided with resistance wires 1 02, the resistance wire 102 can be arranged on the inner side of the linear heating tube resistor 401 and the semi-arc heating tube resistor 402 in a spiral structure, the inner side of the linear heating tube resistor 401 and the semi-arc heating tube resistor 402 is filled with an insulating heat-conductive filler 101, and the insulating heat-conductive filler 101 is wrapped on the outer side of the resistance wire 102, the linear heating tube resistor 401 and the semi-arc heating tube resistor 402 are arranged in one piece, and one end of the linear heating tube resistor 401 is provided with a first connecting mechanism 6, and the first connecting mechanism 6 includes a fixedly arranged one end of the linear heating tube resistor 401 The fixed cylinder 601 at the end is made of insulating material to prevent accidental contact and injury to personnel. A conductive slide plate 604 is slidably arranged on the inner side of the fixed cylinder 601. A plurality of first compensation springs 605 fixedly connected to the fixed cylinder 601 are fixedly arranged on one side of the conductive slide plate 604. A conductive slip ring 602 slidingly penetrating the fixed cylinder 601 is fixedly arranged on the other side of the conductive slide plate 604. The outer surface of the conductive slip ring 602 is sprayed with insulating paint to prevent accidental injury to personnel. The conductive slip ring 602 and the conductive slide plate 604 are made of conductive material. The conductive slip ring 60 2 is fixedly provided with a first magnet 603. When in use, when the conductive slip ring 602 slides, it will drive the conductive slide plate 604 at one end of the conductive slip ring 602 to slide on the inner side of the fixed cylinder 601, thereby driving the first compensation spring 605 to expand and contract. The expansion and contraction of the first compensation spring 605 can prevent the conductive slide plate 604 and the conductive slip ring 602 from sliding too much, thereby protecting the connection at one end of the linear heating tube resistor 401 and preventing one end of the linear heating tube resistor 401 from expanding too much due to heat, thereby damaging the end of the linear heating tube resistor 401.

[0035] like Figure 4 , Figure 5 , Fig. 9 , Fig.12As shown, one end of the semi-arc heating tube resistor 402 is provided with a second connecting mechanism 7, and the second connecting mechanism 7 includes a fixing plate 701 fixedly arranged at one end of the semi-arc heating tube resistor 402, and one side of the fixing plate 701 is fixedly provided with a second magnet 702 matched with the first magnet 603. When in use, the semi-arc heating tube resistor 402 on another heating tube resistor assembly 4 is matched with the linear heating tube resistor 401 on the adjacent heating tube resistor assembly 4, so that the second magnet 702 at one end of the semi-arc heating tube resistor 402 and the first magnet 603 at one end of the linear heating tube resistor 401 adjacent to it are matched. The iron 603 is magnetically attracted. When the heating tube resistor assembly 4 works for a long time, the heating tube resistor assembly 4 expands, which will drive the conductive slip ring 602 on one side of the first magnet 603 to slide on one end of the fixed tube 601, and then drive the conductive slide plate 604 to slide inside the fixed tube 601, so that the first compensation spring 605 is expanded and contracted, so that the distance between the semi-arc heating tube resistor 402 and its adjacent straight heating tube resistor 401 is compensated, that is, the length direction of the heating tube resistor assembly 4 is compensated, so as to avoid the heating tube resistor assembly 4 from expanding due to long-term heating, which may cause damage to the heating tube resistor assembly 4.

[0036] By magnetically engaging the second magnet 702 at one end of the semi-arc heating tube resistor 402 and the first magnet 603 at one end of the adjacent straight heating tube resistor 401, when the resistance wire 102 inside a heating tube resistor assembly 4 is disconnected after long-term heating, only the corresponding heating tube resistor assembly 4 needs to be replaced, and the entire heating tube resistor assembly 4 does not need to be scrapped, thereby reducing the use cost and increasing the service life of the heating tube resistor assembly 4.

[0037] like Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11As shown, one end of the resistance wire 102 in the linear heating tube resistor 401 is fixedly connected to a conductive plug 610, one end of the conductive plug 610 can be welded to one end of the resistance wire 102, and a central groove 611 is provided on the inner side of the conductive plug 610. One end of the resistance wire 102 in the semi-arc heating tube resistor 402 is fixedly connected to a conductive plug post 703, and the conductive plug post 610 and the conductive plug post 703 can be made of the same material as the resistance wire 102. The diameter of the conductive plug post 703 is equal to the inner diameter of the central groove 611, which can ensure that the conductive plug post 703 is inserted into the resistance wire 102. When the conductive plug 703 is inserted into the center groove 611, the conductive plug 703 is always in contact with the inner wall of the center groove 611 to ensure smooth conduction of the resistance wire 102. The conductive plug 703 can be welded to one end of the resistance wire 102. The conductive plug 703 is slidably inserted into the center groove 611 at one end of the conductive plug tube 610. A conductive rod 613 is fixedly arranged on the inner side of the conductive slip ring 602. A conductive contact plate 614 that is slidably fitted with the outer side of the conductive plug tube 610 is fixedly arranged on one end of the conductive rod 613. A conductive contact plate 614 that is slidably fitted with the outer side of the conductive plug tube 610 is provided on the inner side of the fixed tube 601. The conductive contact plate 614 and the conductive rod 613 are made of conductive material. The conductive contact plate 614 and the conductive rod 613 can make the electricity on the conductive plug 610 conduct to the conductive slip ring 602. When installing, the conductive plug 703 at one end of the semi-arc-shaped heating tube resistor 402 is inserted into the central groove 611 of the conductive plug 610 at one end of the adjacent linear heating tube resistor 401. During the insertion process, since the inner hole diameter of the central groove 611 is consistent with the diameter of the conductive plug 703, the conductive plug 703 is inserted into the conductive slip ring 602. 3 is always in contact with the inner surface of the central groove 611, so that the resistance wire 102 in the semi-arc heating tube resistor 402 can be connected with the resistance wire 102 in the adjacent straight heating tube resistor 401, and the conductive plug 703 slides freely in the central groove 611, so that when the conductive plug 703 slides on one end of the conductive plug 610, it can be ensured that the conductive plug 703 is always connected with the conductive plug 610, so that when the straight heating tube resistor 401 and the adjacent semi-arc heating tube resistor 402 expand due to heat, the stability of conductivity is always guaranteed.

[0038] like Figure 5 , Figure 8As shown, an alarm 606 is fixedly provided at one end of the fixed cylinder 601, a conductive hole 608 is opened on the conductive slide plate 604, a conductive column 607 electrically connected to the alarm 606 and passing through the conductive hole 608 is provided on the inner side of the fixed cylinder 601, and two conductive contacts 609 are fixedly provided on the conductive column 607, which are respectively located on both sides of the conductive hole 608 and contact and cooperate with the conductive hole 608. The conductive contacts 609 and the conductive column 607 are both made of conductive materials, and the outer surface of the conductive column 607 is sprayed with insulating paint to prevent the conductive slide plate 604 from shaking, so that the conductive slide plate 604 contacts the conductive column 607 to prevent false alarms. Through the conductive contacts 609 located on both sides of the conductive hole 608, no matter which direction the conductive slide plate 604 slides inside the fixed cylinder 601, the conductive slide plate 604 can contact and conduct electricity with the conductive contacts 609, so that the conductive plug 703 at one end of the semi-arc heating tube resistor 402 slides into the adjacent In the central groove 611 on the conductive insert 610 at one end of the linear heating tube resistor 401, when the semi-arc heating tube resistor 402 and the linear heating tube resistor 401 are heated for a long time, they will expand due to the heat, so that the interface between the semi-arc heating tube resistor 402 and its adjacent linear heating tube resistor 401 will expand and contract, so that the conductive slip ring 602 drives the conductive slide plate 604 to slide inside the fixed tube 601, so that the conductive holes 608 on the conductive slide plate 604 slide toward one side of the conductive insert 610 together. When the conductive holes 608 on the conductive slide plate 604 slide to contact the conductive contacts 609, the electricity on the conductive slide plate 604 will be conducted to the conductive contacts 609, and then to the alarm 606 through the conductive columns 607 on one side of the conductive contacts 609, so that personnel can operate in time to avoid further damage to the heating tube resistor assembly 4, and it is convenient for personnel to find the damaged heating tube resistor assembly 4, thereby improving replacement efficiency.

[0039] Example 2: Figure 1 , Figure 2 , Figure 3 , Fig.13As shown, the straight heating tube resistor 401 of the plurality of heating tube resistor assemblies 4 and the semi-arc heating tube resistor 402 are connected end to end to form a continuous "S"-shaped structure. The "S"-shaped structure can increase the heating area, making the heating more uniform. A compensation plate 3 is provided on the outer side of the "S"-shaped structure. Both ends of the compensation plate 3 are installed inside the protection box 1 by screws. The protection box 1 adopts a cavity structure with one end open and the rest sealed. A plurality of heat dissipation holes 2 are provided on each surface of the protection box 1. The heat dissipation holes 2 can dissipate the heat of the heating tube resistor assembly 4 to prevent The heating tube resistor assembly 4 is overheated, causing the heating tube resistor assembly 4 to be damaged. A limiting groove 5 is provided on the compensation plate 3 to be clamped with the linear heating tube resistor 401. A slide groove 9 connected to the limiting groove 5 is provided on the upper side of the compensation plate 3. The slide groove 9 adopts a "trumpet-shaped" structure. Compensation fasteners 8 for compensating the linear heating tube resistor 401 are provided on both sides of the inner part of the limiting groove 5. The compensation fastener 8 includes a compensation groove 804 provided on the compensation plate 3, a slide plate 803 is slidably provided on the inner side of the compensation groove 804, and a slide plate 803 is fixedly provided on one side of the slide plate 803 to be connected with the compensation A second compensation spring 805 is fixedly connected to the inner side of the compensation groove 804, and a slide bar 802 is fixedly arranged on the other side of the slide plate 803, which slides through the compensation groove 804 and extends to the inside of the limiting groove 5. A buckle plate 801 is fixedly arranged at one end of the slide bar 802, which is pressed and fitted with one side of the linear heating tube resistor 401. The buckle plate 801 adopts an arc structure, which is convenient for clamping and fixing the linear heating tube resistor 401. When in use, the several heating tube resistor assemblies 4 assembled head to tail are clamped into the inside of the limiting groove 5 from the slide groove 9, so that the heating tube resistor assemblies 4 can be clamped. The linear heating tube resistor 401 is inserted between the two buckle plates 801 in the limiting groove 5. When the diameter direction of the linear heating tube resistor 401 is heated and expanded, the two buckle plates 801 will be squeezed, so that the sliding rod 802 on one side of the two buckle plates 801 drives the slide plate 803 to slide on the inner side of the compensation groove 804, and then compresses the second compensation spring 805 inside the compensation groove 804, so that the diameter direction of the linear heating tube resistor 401 can be compensated, preventing the linear heating tube resistor 401 from excessive expansion and damage during long-term heating.

[0040] It should be noted that, when installing the heating tube resistor box, the conductive plug 703 at one end of the semi-arc heating tube resistor 402 of the plurality of heating tube resistor assemblies 4 is first inserted into the central groove 611 of the conductive plug 610 at one end of the adjacent linear heating tube resistor 401, and so on, the plurality of heating tube resistor assemblies 4 are sequentially connected together according to the above method, and the specific steps of the connection are: the conductive plug 703 at one end of the semi-arc heating tube resistor 402 is inserted into the conductive plug 610 at one end of the adjacent linear heating tube resistor 401 After being inserted into the center groove 611, the second magnet 702 at one end of the semi-arc heating tube resistor 402 is magnetically matched with the first magnet 603 at one end of the adjacent straight heating tube resistor 401. When all the heating tube resistor assemblies 4 are connected, the straight heating tube resistor 401 of the entire heating tube resistor assembly 4 is inserted from the slide groove 9 into the two buckle plates 801 in the limiting groove 5, so that the entire heating tube resistor assembly 4 can be continuously fixed on the compensation plate 3, and then the compensation plate 3 is fixed to the inside of the protective box 1 by screws to complete the installation.

[0041] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A heating tube resistance box, comprising a protection box (1) and a plurality of heating tube resistance assemblies (4) located inside the protection box (1), characterized in that: A plurality of the heating tube resistor assemblies (4) are mutually conductively and electromagnetically attracted to cooperate with each other, one of the heating tube resistor assemblies (4) comprising a straight heating tube resistor (401) and a semi-arc heating tube resistor (402), the straight heating tube resistor (401) and the semi-arc heating tube resistor (402) being integrally arranged, one end of the straight heating tube resistor (401) being provided with a first connecting mechanism (6), one end of the semi-arc heating tube resistor (402) being provided with a second connecting mechanism (7), the first connecting mechanism (6) and the second connecting mechanism (7) at one end of an adjacent semi-arc heating tube resistor (402) being conductively and electromagnetically attracted to cooperate with each other; The first connection mechanism (6) comprises a fixed cylinder (601) fixedly arranged at one end of the linear heating tube resistor (401); a conductive slide plate (604) is slidably arranged on the inner side of the fixed cylinder (601); a plurality of first compensation springs (605) fixedly connected to the fixed cylinder (601) are fixedly arranged on one side of the conductive slide plate (604); a conductive slip ring (602) slidably penetrating the fixed cylinder (601) is fixedly arranged on the other side of the conductive slide plate (604); and a first magnet (603) is fixedly arranged on one end of the conductive slip ring (602).

2. A heating tube resistance box according to claim 1, characterized in that: The second connection mechanism (7) comprises a fixing plate (701) fixedly arranged at one end of the semi-arc-shaped heating tube resistor (402), and a second magnet (702) cooperating with the first magnet (603) is fixedly arranged on one side of the fixing plate (701).

3. A heating tube resistance box according to claim 2, characterized in that: A resistance wire (102) is arranged at the inner center of the linear heating tube resistor (401) and the semi-arc heating tube resistor (402), and the inner sides of the linear heating tube resistor (401) and the semi-arc heating tube resistor (402) are filled with an insulating heat-conductive filler (101) wrapped around the outer side of the resistance wire (102).

4. A heating tube resistance box according to claim 3, characterized in that: One end of the resistance wire (102) in the linear heating tube resistor (401) is fixedly connected to a conductive plug-in tube (610), and a central groove (611) is provided on the inner side of the conductive plug-in tube (610); one end of the resistance wire (102) in the semi-arc heating tube resistor (402) is fixedly connected to a conductive plug-in column (703), and the conductive plug-in column (703) is slidably inserted into the central groove (611) at one end of the conductive plug-in tube (610).

5. A heating tube resistance box according to claim 4, characterized in that: A conductive rod (613) is fixedly disposed on the inner side of the conductive slip ring (602), a conductive contact plate (614) that is slidably fitted with the outer side of the conductive plug-in cylinder (610) is fixedly disposed on one end of the conductive rod (613), and a guide groove (612) that cooperates with the conductive rod (613) is provided on the inner side of the fixed cylinder (601).

6. A heating tube resistance box according to claim 5, characterized in that: An alarm (606) is fixedly arranged at one end of the fixed cylinder (601), a conductive hole (608) is opened on the conductive slide plate (604), a conductive column (607) electrically connected to the alarm (606) and passing through the conductive hole (608) is arranged on the inner side of the fixed cylinder (601), and two conductive contacts (609) are fixedly arranged on the conductive column (607), which are respectively located on both sides of the conductive hole (608) and are in contact with the conductive hole (608).

7. The heating tube resistance box according to claim 1, characterized in that: A plurality of straight heating tube resistors (401) and semi-arc heating tube resistors (402) of the heating tube resistor assembly (4) are connected end to end to form a continuous "S"-shaped structure, a compensation plate (3) is provided on the outer side of the "S"-shaped structure, and both ends of the compensation plate (3) are mounted inside the protection box (1) by means of screws.

8. A heating tube resistance box according to claim 7, characterized in that: The protection box (1) adopts a cavity structure with one end open and the rest sealed, each surface of the protection box (1) is provided with a plurality of heat dissipation holes (2), the compensation plate (3) is provided with a limit groove (5) for engaging with the linear heating tube resistor (401), a slide groove (9) connected to the limit groove (5) is provided through the upper side of the compensation plate (3), and compensation fasteners (8) for compensating the linear heating tube resistor (401) are provided on both sides of the inner side of the limit groove (5).

9. A heating tube resistance box according to claim 8, characterized in that: The compensation fastener (8) comprises a compensation groove (804) provided on the compensation plate (3); a slide plate (803) is slidably provided on the inner side of the compensation groove (804); a second compensation spring (805) fixedly connected to the inner side of the compensation groove (804) is fixedly provided on one side of the slide plate (803); a slide rod (802) that slides through the compensation groove (804) and extends to the inside of the limit groove (5) is fixedly provided on the other side of the slide plate (803); a buckle plate (801) that is pressed and fitted against one side of the linear heating tube resistor (401) is fixedly provided on one end of the slide rod (802).

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