A replaceable heating tube for a heat treatment furnace

Abstract

This invention provides a heat treatment furnace heating tube that is easy to replace, belonging to the technical field of heat treatment furnaces. It includes two connecting bases, each with a pre-drilled insertion interface on its adjacent wall surface. A side tube is detachably installed in each insertion interface, and a main tube is detachably installed between the two opposing side tubes. An insulating base is detachably installed at the end of each side tube furthest from the main tube. A heating resistor is detachably connected between the two connecting terminals. This invention solves the problem that existing heat treatment furnace heating tubes are installed between two connecting bases, which are electrically connected to an external power source via wires. Replacing the heating tube requires opening the top cover, removing one connecting base, and then pulling out the heating tube, which is inconvenient and hinders replacement. Furthermore, since the heating tube is a single unit, replacing it requires replacing the entire heating tube, resulting in high operating costs.

Description

Technical Field

[0001] This invention belongs to the field of heat treatment furnace technology, and specifically relates to a heating tube for a heat treatment furnace that is easy to replace. Background Technology

[0002] A heat treatment furnace is an electric or fuel-fired furnace used for heating furnace charge for heat treatment. Heat treatment is an important means of improving the mechanical properties of workpieces. Good heat treatment can improve various mechanical properties of workpieces, such as strength and toughness, to meet allowable requirements. A heat treatment furnace includes components such as the furnace body and heating tubes.

[0003] The existing heating tubes for heat treatment furnaces are installed between two connecting bases, which are electrically connected to an external power source via wires. When replacing the heating tube, the top cover needs to be opened, one of the connecting bases needs to be removed, and then the heating tube needs to be pulled out. This operation is inconvenient and not conducive to the replacement of the heating tube. At the same time, since the heating tube is a single unit, the entire heating tube needs to be replaced when replacing the heating tube, resulting in high operating costs. Summary of the Invention

[0004] This invention provides a heat treatment furnace heating tube that is easy to replace. The purpose is to solve the problems of existing heat treatment furnace heating tubes, which are installed between two connecting bases and electrically connected to an external power source via wires. When replacing the heating tube, it is necessary to open the top cover, remove one of the connecting bases, and then pull out the heating tube. This operation is inconvenient and not conducive to the replacement of the heating tube. At the same time, since the heating tube is a whole structure, the entire heating tube needs to be replaced when replacing the heating tube, resulting in high operating costs.

[0005] This invention provides a heat treatment furnace heating tube that is easy to replace, including two connecting bases. Each of the two connecting bases has a pre-drilled insertion interface on its adjacent wall surface. A side tube is detachably installed in each insertion interface. A main tube is detachably installed between two opposing side tubes. An insulating seat is detachably installed at the end of each side tube away from the main tube. A connecting terminal is fixedly connected to the insulating seat. Both ends of the connecting terminal pass through the insulating seat. A heating resistor is detachably connected between the two connecting terminals. An auxiliary block is fixedly connected to the side of the insertion interface opening.

[0006] By adopting the above technical solution and using a detachable connection method, the heating element and the connecting base can be quickly assembled and disassembled, so as to replace the heating element. At the same time, it is convenient to assemble and disassemble the various components of the heating element, so as to replace the damaged parts without replacing the entire heating element, which greatly reduces the cost of use.

[0007] Furthermore, the side tube includes a cylindrical tube and a square tube. The square tube is engaged in the insertion interface, and the cylindrical tube is fixedly connected to one end of the square tube outside the insertion interface. The cylindrical tube and the square tube are connected to each other, and the square tube is adapted to the concave opening on the auxiliary block.

[0008] By adopting the above technical solution, the square tube will not rotate in the connector when the main tube is rotated, ensuring that the square tube can move horizontally and engage in the connector when the main tube is rotated. At the same time, the heating tube can be installed and disassembled with one hand by means of the auxiliary block.

[0009] Furthermore, an external thread is reserved on the outer circumferential surface of the columnar tube, and an internal thread is reserved inside both ends of the main tube. The internal threads at both ends of the main tube rotate in opposite directions, and the columnar tube and the main tube are connected to each other through the external thread and the internal thread.

[0010] By adopting the above technical solution, the side tubes at both ends can be moved simultaneously toward the inside or outside of the main tube by rotating the main tube, so as to realize the quick installation and disassembly of the heating tube, which is very convenient to use.

[0011] Furthermore, the columnar tube is connected to the main tube.

[0012] By adopting the above technical solution, it is ensured that the heating resistor can be installed in the side tube and the main tube.

[0013] Furthermore, mounting grooves are reserved on both sides of the interior of the insulating base. A spring is fixedly connected to the bottom wall of the mounting groove. A movable piece is fixedly connected to the other end of the spring. Two limiting blocks are fixedly connected to the wall of the movable piece away from the spring. A limiting port corresponding to the limiting block is reserved on the inner wall of the square tube away from the columnar tube. The limiting block is engaged with the limiting port. Two movable ports are reserved on the wall of the insulating base away from the heating resistor. The movable ports are connected to the mounting groove. A lever is slidably installed in the movable port. One end of the lever is fixedly connected to one side wall of the movable piece.

[0014] By adopting the above technical solution, the spring force can be used to lock the limiting block in the limiting port. When disassembling the insulating seat, the lever is moved to move the limiting block out of the limiting port, the spring contracts, and pushes the insulating seat into the square tube. The insulating seat is then pulled out by the heating resistor, thus achieving rapid disassembly of the insulating seat.

[0015] Furthermore, steel balls are embedded in both transverse walls of the movable piece, the steel balls are located on both sides of the lever, and the steel balls are in contact with the two side walls of the mounting groove.

[0016] By adopting the above technical solution, the moving piece can move smoothly back and forth in the mounting slot using steel balls, thus preventing the moving piece from getting stuck in the mounting slot.

[0017] Furthermore, the wall surface of the movable opening away from the center of the insulating base is inclined, and the opening of the movable opening is flush with the wall surface of the lever away from the movable piece.

[0018] By adopting the above technical solution, fingers can be placed in the movable opening during disassembly to quickly move the lever, facilitating the disassembly of the insulating base. At the same time, it avoids the lever being too long and touching the terminals in the connector, which would prevent the connecting terminals from being tightly fitted with the terminals in the connector, thus ensuring electrical connection between the connecting terminals and the terminals in the connector.

[0019] Furthermore, the end of the limiting block located in the limiting opening is provided with an inclined surface.

[0020] By adopting the above technical solution, it is ensured that when installing the insulating base, it can be directly pushed into the square tube without having to move the lever, so that the insulating base can be installed.

[0021] Furthermore, a magnetic sheet is fixedly connected to the inclined surface of the limiting block, and a magnetic block is fixedly connected to the right-angled wall surface of the limiting opening, with the magnetic sheet and the magnetic block tightly attracted to each other.

[0022] By adopting the above technical solution, the magnetic sheet and magnetic block can be attracted to each other, so as to make the limiting block more stably locked in the limiting port and prevent the limiting block from moving out of the limiting port.

[0023] Furthermore, a rotating rod is rotatably connected to one end of the connecting terminal inside the side tube, and a rotating limiting strip is fixedly connected to one end of the rotating rod outside the connecting terminal. Right-angle copper pieces are fixedly connected to both ends of the heating resistor. A through-hole is reserved on the longitudinal vertical edge of the right-angle copper piece. The through-hole and the rotating limiting strip are adapted to each other. The rotating limiting strip is in close contact with the longitudinal vertical edge of the right-angle copper piece. When the connecting terminal is connected to the heating resistor, the rotating limiting strip and the through-hole are perpendicular to each other. When the connecting terminal is disassembled from the heating resistor, the rotating limiting strip and the through-hole are parallel to each other.

[0024] By adopting the above technical solution, the right-angle copper sheet can be locked and disassembled by rotating the limiting strip, so as to install and remove the heating resistor and facilitate the replacement of the heating resistor.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. This invention adopts a detachable connection method to achieve quick assembly and disassembly of the heating tube and the connecting base, so as to replace the heating tube. At the same time, it facilitates the assembly and disassembly of the various components of the heating tube, so as to replace the damaged parts without replacing the entire heating tube, which greatly reduces the cost of use.

[0027] 2. The present invention allows for the installation and disassembly of the heating element with one hand using the auxiliary block, making it very convenient to use.

[0028] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0029] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 This is a three-dimensional structural diagram of the heating tube installation according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the main cross-sectional structure of the heating tube according to an embodiment of the present invention;

[0032] Figure 3 This is an embodiment of the present invention. Figure 2 A magnified structural diagram at point a;

[0033] Figure 4 This is a schematic diagram of the three-dimensional structure of the side tube according to an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the locking structure between the rotating limiting strip and the through-hole in an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the auxiliary block structure according to an embodiment of the present invention;

[0036] Reference numerals: 1. Connecting base; 2. Insertion interface; 3. Side tube; 4. Main tube; 5. Insulating base; 6. Connecting terminal; 7. Heating resistor; 8. Auxiliary block; 31. Columnar tube; 32. Square tube; 51. Mounting groove; 52. Spring; 53. Movable piece; 54. Steel ball; 55. Paddle; 56. Movable opening; 57. Limiting block; 58. Magnetic piece; 59. Limiting opening; 510. Magnetic block; 61. Rotating rod; 62. Rotating limiting strip; 71. Right-angle copper piece; 72. Through opening. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] Reference Figure 1 , Figure 2 and Figure 4 As shown in the figure, this embodiment of the invention proposes a heating tube for a heat treatment furnace that is easy to replace, including two connecting bases 1. Each of the two connecting bases 1 has a pre-reserved insertion interface 2 on its adjacent wall surface. A side tube 3 is detachably installed in each insertion interface 2. The side tube 3 includes a cylindrical tube 31 and a square tube 32. The square tube 32 is engaged in the insertion interface 2. The cylindrical tube 31 is fixedly connected to the end of the square tube 32 outside the insertion interface 2. The cylindrical tube 31 and the square tube 32 are connected to each other. The square tube 32 is adapted to the concave opening on the auxiliary block 8. When the main tube 4 is rotated, the square tube 32 will not rotate in the insertion interface 2, ensuring the rotation of the main tube 4. At the same time, the square tube 32 can move horizontally and engage in the insertion interface 2. Simultaneously, the heating tube can be installed and disassembled by one hand through the auxiliary block 8. The outer circumference of the columnar tube 31 is reserved with an external thread, and the inner ends of the main tube 4 are reserved with internal threads. The internal threads at both ends of the main tube 4 rotate in opposite directions. The columnar tube 31 and the main tube 4 are connected to each other through the external and internal threads. By rotating the main tube 4, the side tubes 3 at both ends can move simultaneously toward the inside or outside of the main tube 4, so as to realize the quick installation and disassembly of the heating tube. It is very convenient to use. The columnar tube 31 and the main tube 4 are connected to each other to ensure that the heating resistor 7 can be installed in the side tubes 3 and the main tube 4.

[0039] Reference Figure 2 and Figure 3As shown, a main tube 4 is detachably installed between the two opposing side tubes 3. An insulating seat 5 is detachably installed at the end of the side tube 3 away from the main tube 4. Both sides of the insulating seat 5 have pre-reserved mounting grooves 51. A spring 52 is fixedly connected to the bottom wall of the mounting groove 51. A movable piece 53 is fixedly connected to the other end of the spring 52. Two limiting blocks 57 are fixedly connected to the wall of the movable piece 53 away from the spring 52. A limiting opening 59 corresponding to the limiting block 57 is pre-reserved on the inner wall of the square tube 32 away from the columnar tube 31. The limiting block 57 engages with the limiting opening 59. The insulating seat 5 is located away from the heating element. Two movable openings 56 are pre-drilled on one wall of resistor 7. These openings 56 are connected to the mounting groove 51. A lever 55 is slidably installed in each opening 56. One end of the lever 55 is fixedly connected to one side wall of movable piece 53. The spring force of spring 52 engages the limiting block 57 in the limiting opening 59. When disassembling the insulating seat 5, the lever 55 is moved, causing the limiting block 57 to move out of the limiting opening 59. Spring 52 retracts, pushing the insulating seat 5 into the square tube 32. Heating resistor 7 then pulls the insulating seat 5 out, achieving rapid disassembly of the insulating seat 5. Steel balls 54 are embedded in both transverse walls of movable piece 53. The steel balls 54 are located on both sides of the lever 55. The steel balls 54 contact the side walls of the mounting groove 51. The steel balls 54 allow the movable piece 53 to move smoothly back and forth in the mounting groove 51, preventing the movable piece 53 from getting stuck in the mounting groove 51. The movable opening 56 has a sloped surface on one side away from the center of the insulating base 5. The opening of the movable opening 56 is flush with the side of the lever 55 away from the movable piece 53, so that fingers can be placed in the movable opening 56 during disassembly to quickly move the lever 55, facilitating the disassembly of the insulating base 5. At the same time, it prevents the lever 55 from being too long and touching the terminal in the connector 2, which would prevent the connecting terminal 6 from being tightly connected to the terminal in the connector 2. The connection is tight to ensure electrical connection between the connecting terminal 6 and the terminal in the plug interface 2. The limiting block 57 has an inclined surface at one end in the limiting port 59 to ensure that the insulating seat 5 can be directly pushed into the square tube 32 when installing the insulating seat 5 without having to move the lever 55. A magnetic sheet 58 is fixedly connected to the inclined surface of the limiting block 57, and a magnetic block 510 is fixedly connected to the right-angle wall of the limiting port 59. The magnetic sheet 58 and the magnetic block 510 are tightly attracted to each other. Through the attraction of the magnetic sheet 58 and the magnetic block 510, the limiting block 57 can be more stably locked in the limiting port 59 to prevent the limiting block 57 from moving out of the limiting port 59.

[0040] Reference Figure 2 and Figure 3As shown, a connecting terminal 6 is fixedly connected to the insulating base 5. Both ends of the connecting terminal 6 pass through the insulating base 5. A heating resistor 7 is detachably connected between the two connecting terminals 6. A rotating rod 61 is rotatably connected to one end of the connecting terminal 6 inside the side tube 3. A rotating limiting strip 62 is fixedly connected to one end of the rotating rod 61 outside the connecting terminal 6. Right-angle copper pieces 71 are fixedly connected to both ends of the heating resistor 7. A through-hole 72 is reserved on the longitudinal vertical edge of the right-angle copper piece 71. The through-hole 72 and the rotating limiting strip 62 are adapted to each other. The rotating limiting strip 62 is in close contact with the longitudinal vertical edge of the right-angle copper piece 71. When the connecting terminal 6 is connected to the heating resistor 7, the rotating limiting strip 62 and the through-hole 72 are perpendicular to each other. When the connecting terminal 6 is disassembled from the heating resistor 7, the rotating limiting strip 62 and the through-hole 72 are parallel to each other. By rotating the rotating limiting strip 62, the right-angle copper piece 71 can be locked and disassembled, so as to facilitate the installation and disassembly of the heating resistor 7 and the replacement of the heating resistor 7.

[0041] Reference Figure 1 and Figure 6 An auxiliary block 8 is fixedly connected to the side of the insertion interface 2.

[0042] By adopting a detachable connection method, the heating tube and the connecting base 1 can be quickly assembled and disassembled, so as to replace the heating tube. At the same time, it is convenient to assemble and disassemble the various components of the heating tube, so as to replace the damaged parts without replacing the entire heating tube, which greatly reduces the cost of use.

[0043] The specific implementation method is as follows: When it is necessary to replace the heating tube, rotate the main tube 4 so that the columnar tube 31 on the side tube 3 is slowly drawn into the main tube 4. When the square tube 32 moves out of the insertion interface 2, with the assistance of the auxiliary block 8, the columnar tube 31 on the side tube 3 continues to move into the main tube 4. When the square tube 32 is completely moved out of the insertion interface 2, remove the main tube 4 and the side tube 3.

[0044] When it is necessary to replace the heating resistor 7, first remove the old heating resistor 7, move the lever 55 so that the limiting block 57 moves out of the limiting port 59, the spring 52 contracts, pushes the insulating seat 5 into the square tube 32, rotate the main tube 4 in the opposite direction so that the columnar tube 31 slowly moves out of the main tube 4. When the columnar tube 31 has completely moved out of the main tube 4, pull the square tube 32. Since the diameter of the columnar tube 31 is greater than the length of the diagonal of the square tube 32, pull the insulating seat 5 out of the square tube 32. Rotate the rotating limiting strip 62 so that the rotating limiting strip 62 is parallel to the through port 72, unlock the right angle copper piece 71, and remove the heating resistor 7.

[0045] Next, install the new heating resistor 7, pass the heating resistor 7 through the main tube 4, and then pass the through hole 72 on the right-angle copper piece 71 through the rotating limiting strip 62. Rotate the rotating limiting strip 62 to ninety degrees so that the rotating limiting strip 62 tightly presses the right-angle copper piece 71. Then push the insulating seat 5 into the square tube 32. At this time, the limiting block 57 is put into the mounting groove 51, and the spring 52 retracts. When the limiting block 57 moves to the limiting opening 59, under the action of the spring force of the spring 52, the limiting block 57 is locked in the limiting opening 59. Then rotate the main tube 4 so that the columnar tubes 31 at both ends are simultaneously put into the main tube 4. When the columnar tube 31 moves to one end of the main tube 4, stop rotating the main tube 4 and lock the square tube 32 into the concave opening of the auxiliary block 8. Rotate the main tube 4 in the opposite direction so that the square tube 32 slowly moves into the insertion interface 2, realizing the quick disassembly and installation of the heating tube, thus facilitating the replacement of the heating tube.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A heating tube for heat treatment furnaces that is easy to replace, comprising two connecting bases (1), characterized in that, Two adjacent wall surfaces of the two connecting bases (1) are reserved with plug interfaces (2), the side pipes (3) are detachably installed in the plug interfaces (2), the opposite two side pipes (3) are detachably installed with the main pipe (4), the inside of the side pipe (3) is detachably installed with the insulating base (5) away from the end of the main pipe (4), the connecting terminal (6) is fixedly connected on the insulating base (5), the two ends of the connecting terminal (6) pass through the insulating base (5), the heating resistor (7) is detachably connected between the two connecting terminals (6), the side of the mouth of the plug interface (2) is fixedly connected with the auxiliary block (8); The side pipe (3) comprises a cylindrical pipe (31) and a square pipe (32), the square pipe (32) is clamped in the plug interface (2), the cylindrical pipe (31) is fixedly connected at one end of the square pipe (32) outside the plug interface (2), the cylindrical pipe (31) and the square pipe (32) are connected with each other, and the square pipe (32) and the recessed mouth on the auxiliary block (8) are matched with each other. The outer circumferential surface of the cylindrical pipe (31) is reserved with an external thread, the inside of the two ends of the main pipe (4) is reserved with an internal thread, the rotation directions of the internal threads of the two ends of the main pipe (4) are opposite, and the cylindrical pipe (31) and the main pipe (4) are screwed with each other through the external thread and the internal thread. The inside of the insulating base (5) is reserved with installation grooves (51) on both sides, the spring (52) is fixedly connected on the bottom wall of the installation groove (51), the other end of the spring (52) is fixedly connected with the movable piece (53), two limiting blocks (57) are fixedly connected on the wall surface of the movable piece (53) away from the spring (52), the inner wall of the end of the square pipe (32) away from the cylindrical pipe (31) is reserved with limiting openings (59) corresponding to the limiting blocks (57), the limiting blocks (57) and the limiting openings (59) are clamped and connected, two movable openings (56) are reserved on the wall surface of the insulating base (5) away from the heating resistor (7), the movable openings (56) and the installation grooves (51) are communicated with each other, the push piece (55) is slidably installed in the movable opening (56), and one end of the push piece (55) is fixedly connected with one side wall of the movable piece (53). The end of the connecting terminal (6) inside the side pipe (3) is rotatably connected with the rotating rod (61), the end of the rotating rod (61) outside the connecting terminal (6) is fixedly connected with the rotating limiting strip (62), the two ends of the heating resistor (7) are fixedly connected with the right-angle copper sheet (71), the longitudinal vertical edge of the right-angle copper sheet (71) is reserved with the through opening (72), the through opening (72) and the rotating limiting strip (62) are matched with each other, the rotating limiting strip (62) is in close contact with the longitudinal vertical edge of the right-angle copper sheet (71), when the connecting terminal (6) is connected with the heating resistor (7), the rotating limiting strip (62) and the through opening (72) are perpendicular to each other, and when the connecting terminal (6) is detached from the heating resistor (7), the rotating limiting strip (62) and the through opening (72) are parallel to each other.

2. The replaceable heating tube for a heat treatment furnace according to claim 1, characterized by: The cylindrical pipe (31) and the main pipe (4) are communicated with each other.

3. The replaceable heating tube for a heat treatment furnace according to claim 1, characterized by: The lateral two wall surfaces of the movable piece (53) are embedded with steel balls (54), which are located at two sides of the shifting piece (55), and the steel balls (54) contact with the two side walls of the installation groove (51).

4. The replaceable heating tube for a heat treatment furnace according to claim 1, characterized by: The wall surface of the movable piece (56) far from the center of the insulating base (5) is beveled, and the mouth of the movable piece (56) is flush with the wall surface of the shifting piece (55) far from the movable piece (53).

5. The replaceable heating tube for a heat treatment furnace according to claim 1, characterized by: The limiting block (57) is provided with a beveled surface at one end in the limiting mouth (59).

6. The replaceable heating tube for a heat treatment furnace according to claim 1, characterized by: The beveled surface of the limiting block (57) is fixedly connected with a magnetic piece (58), the right-angled wall surface of the limiting mouth (59) is fixedly connected with a magnetic block (510), and the magnetic piece (58) and the magnetic block (510) are tightly attracted to each other.

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