Annealing method and annealing equipment for stainless steel electric heating tube

Abstract

The invention discloses a stainless steel electric heating tube annealing method and annealing equipment, and belongs to the technical field of annealing. The annealing equipment comprises a workbench, a cooling tank is assembled on one side of the workbench, a cooling pipe is arranged at the bottom of the cooling tank, the two ends of the cooling pipe penetrate through the cooling tank and extend into the workbench, a refrigeration mechanism is assembled in the workbench, and the two ends of the cooling pipe are connected with the input end and the output end of the refrigeration mechanism respectively. The temperature of the cooling solution in the cooling tank for annealing and cooling can be controlled, and the cooling tank for adjusting the temperature can provide cooling media at different temperatures, so that the cooling rate can be accurately controlled according to the types of metals and the required final performance; and meanwhile, the metal pipe is cooled in the cooling tank, so that the metal pipe can be uniformly cooled on the whole section, internal stress and deformation caused by non-uniform cooling are reduced, and a certain gain is achieved for keeping the size precision and the structural integrity of the metal pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of annealing equipment, and in particular relates to a stainless steel electric heating tube annealing method and annealing equipment. Background Art

[0002] Stainless steel electric heating tubes are made of a metal tube as the outer shell, an electric heating wire installed inside the tube, and the gap is tightly filled with crystalline magnesium oxide powder with good thermal conductivity and insulation. The finished product is usually U-shaped, M-shaped and ring-shaped. Annealing is an important process before bending the metal tube.

[0003] Chinese utility model patent CN219136836U discloses a short-circuit annealing device capable of rapid annealing, which utilizes two electric heating blocks to gradually approach each other to clamp and fix the electric heating pipe between the two electric heating blocks, and the electric heating blocks transfer the heat generated by them to the electric heating pipe to heat the electric heating pipe until the electric heating pipe is heated to a preset temperature and then stops. The electric heating pipe is heated to a preset temperature and begins to cool slowly after being bent. During the slow cooling process of the electric heating pipe, the electric heating pipe can make the internal organizational structure of the electric heating pipe close to a balanced state, so that the electric heating pipe obtains good use performance and process performance, completes the annealing operation of the electric heating pipe, and improves the quality of the electric heating pipe.

[0004] In the existing annealing process, after the metal is heated, it is usually cooled naturally. However, since the stainless steel electric heating tube is easy to bend through annealing, the temperature at the bend will be uneven during natural cooling, resulting in residual stress at the bend, affecting the stability of the stainless steel electric heating tube. In addition, although the existing annealing process can be performed by clamping and fixing the electric heating tube pipeline for heating annealing, and the heating component assembly can be adjusted to a certain length, when the distance between the heating components is too large, it will cause gravity bending in the middle of the stainless steel electric heating tube that is difficult to see with the naked eye. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In order to solve the problems in the above background technology, the present invention adopts the following technical solutions.

[0007] A stainless steel electric heating tube annealing equipment comprises a workbench, a mounting plate is symmetrically arranged in the center of the upper surface of the workbench, sliding rods are symmetrically arranged between the mounting plates, a pair of sliding plates are slidably connected to the sliding rods, a heating component is mounted on the sliding plate, the heating component comprises a fixed clamping block fixed at one end of the upper surface of the sliding plate, a notch is cut on one side of the upper end of the fixed clamping block, a first heating block is mounted in the notch, a connecting plate is fixedly arranged at the other end of the upper surface of the sliding plate, the connecting plate is an L-shaped structure, a cylinder is mounted on the outer side of the connecting plate, a movable clamping block is slidably arranged on the inner side of the connecting plate, and the output end of the cylinder passes through the connecting plate and is connected to the movable clamping block, a notch is opened at the end of the movable clamping block opposite to the fixed clamping block, and a second heating block is mounted in the notch; a cooling trough is mounted on one side of the workbench, a cooling pipe is arranged at the bottom of the cooling trough, two ends of the cooling pipe pass through the cooling trough and extend into the workbench, a refrigeration mechanism is mounted in the workbench, and two ends of the cooling pipe are respectively connected to the input end and the output end of the refrigeration mechanism, and an electric power control box is arranged at the other end inside the workbench.

[0008] Preferably, the refrigeration mechanism includes a bracket, a condenser is placed at one end of the upper surface of the bracket, an input pipe is connected to the upper surface of the condenser, and the end of the input pipe is connected to one end of the cooling pipe, the lower surface of the condenser is connected to a water pump through a pipeline, the output end of the water pump is connected to a radiator through a pipeline, the output end of the radiator is connected to the condenser, the output end of the condenser is connected in series with multiple storage tanks, the upper ends of the storage tanks are commonly connected to piston compressors, the output ends of the piston compressors are connected to output pipes, and the end of the output pipes is connected to the other end of the cooling pipe.

[0009] Preferably, a first connecting pipe is provided between the radiator and the condenser for connection, a valve is installed on the first connecting pipe, a second connecting pipe is provided at the output end of the condenser for connection with the storage tank, the second connecting pipe is externally connected to a flow detector, and a connecting pipe is provided between the storage tank and the piston compressor.

[0010] Preferably, the cylinder, movable clamp and fixed clamp are all provided with wires for signal connection with the power control box. A gear voltage regulator is also provided in the workbench, and the gear voltage regulator is connected with the power control box signal for controlling the current input on the movable clamp and the fixed clamp.

[0011] Preferably, the sides of the fixed clamp block and the movable clamp block on the same skateboard are provided with wires for connection. The heating components on the two skateboards are in an open circuit state after the signal is connected to the power control box. The stainless steel electric heating tube is placed behind the two heating components to make the two heating components electrically conductive.

[0012] Preferably, a metal connecting belt is provided in the center of the upper surface of the workbench, and the metal connecting belt is connected to the power control box for signal through a wire. Ceramic pads are provided at both ends and the center of the metal connecting belt. A telescopic rod is slidably connected to the metal connecting belt. The telescopic rod consists of a fixed rod and a telescopic rod. The fixed rod is a hollow structure. The telescopic rod is inserted into the fixed rod. Multiple through holes are opened on the sides of the fixed rod and the telescopic rod. When the through holes on the fixed rod and the telescopic rod overlap, they are fixed by screws.

[0013] Preferably, a slider is slidably connected to one of the sliding rods, a connecting plate is welded to the inner side of the slider, a waist hole is opened at the upper end of the connecting plate, an infrared thermometer is inserted in the waist hole, a nut is threadedly connected to the front end of the infrared thermometer, and a block is fixedly sleeved on the end of the infrared thermometer, the nut is rotated clockwise, and the connecting plate is clamped by the nut and the block, so that the infrared thermometer is fixed in the waist hole.

[0014] Preferably, a grille is provided in the cooling tank and above the cooling pipe, a discharge port is provided at the bottom of the cooling tank, the discharge port is sealed by a valve, a plurality of hooks are fixed at equal intervals on the side of the workbench by screws, the hooks are of a Z-shaped structure, and the cooling tank is placed on the hooks.

[0015] According to the above-mentioned equipment, the present application also provides a method for using the equipment for annealing a stainless steel electric heating tube.

[0016] A method for annealing a stainless steel electric heating tube, the specific steps are as follows: Step 1: Manually adjust the distance between a pair of slides according to the length of the stainless steel electric heating tube and start the equipment; Step 2: Roughly adjust the distance between the first heating block and the second heating block according to the diameter of the stainless steel electric heating tube, place the stainless steel electric heating tube between the first heating block and the second heating block, and control the movement of the movable clamp block for a second time so that the first heating block and the second heating block clamp the stainless steel electric heating tube; Step 3: After heating, take out the stainless steel electric heating tube and place it in a cooling tank for cooling.

[0017] Preferably, the temperature of the cooling tank in step 3 is adjusted by a refrigeration mechanism, so as to optimize the physical properties of the stainless steel electric heating tube by utilizing different temperatures.

[0018] Compared with the prior art, the present invention has the following beneficial effects: (1) The temperature of the cooling solution in the cooling tank used for annealing in the present invention can be controlled. The temperature-adjustable cooling tank can provide cooling media of different temperatures, so that the cooling rate can be accurately controlled according to the type of metal and the desired final performance. Rapid cooling can increase hardness, while slow cooling helps to obtain better toughness and plasticity. At the same time, by cooling in the cooling tank, it can ensure that the metal tube is cooled evenly over the entire cross section, reducing the internal stress and deformation caused by uneven cooling, which has a certain benefit in maintaining the dimensional accuracy and structural integrity of the metal tube.

[0019] (2) The height-adjustable telescopic rod in the present invention serves as a supporting component and can be adjusted according to workpieces of different sizes and shapes to ensure that the stainless steel electric heating tube maintains the correct position during the annealing process and prevents the stainless steel electric heating tube from bending during heating due to its excessive length. The heating uniformity and annealing effect of the stainless steel electric heating tube are optimized to a certain extent. The telescopic rod allows the stainless steel electric heating tube to remain stable during the annealing process.

[0020] (3) Furthermore, the cooling rate and temperature directly affect the microstructure of the metal. By adjusting the temperature of the cooling tank, specific phase changes can be promoted or inhibited, thereby obtaining an optimal state of the crystallized magnesium oxide grains in the stainless steel electric heating tube, which is very important for improving the mechanical properties and corrosion resistance of the stainless steel electric heating tube. The precisely controlled cooling process can shorten the processing time, and the stainless steel electric heating tube can achieve the desired performance in a shorter time, which not only improves production efficiency, but also helps to reduce energy consumption and production costs. At the same time, by cooling under controlled conditions, the safety risks caused by improper cooling can be reduced.

[0021] (4) The annealing heating components in the present invention can be adjusted in distance to process metal tubes of different diameters and lengths, thereby improving the versatility and applicability of the equipment. By adjusting the distance between the annealing heating components, heating of different lengths of the stainless steel electric heating tube can be achieved. Accurate control of the heating distance helps to achieve more accurate temperature control, and uniform heating helps to reduce defects such as deformation and cracking of the metal tube caused by uneven temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The stainless steel electric heating tube annealing equipment of the present invention is a three-dimensional Figure 1 .

[0023] Figure 2 It is a top view of the stainless steel electric heating tube annealing equipment in the present invention.

[0024] Figure 3 The stainless steel electric heating tube annealing equipment of the present invention is a three-dimensional Figure 2 .

[0025] Figure 4 The stainless steel electric heating tube annealing equipment of the present invention is a three-dimensional Figure 3 .

[0026] Figure 5 It is an assembly diagram of the heating unit and its adjustment mechanism in the stainless steel electric heating tube annealing equipment of the present invention.

[0027] Figure 6 This is a structural diagram of the heating component in the stainless steel electric heating tube annealing equipment of the present invention.

[0028] Figure 7 It is a cross-sectional view of a cooling tank in the stainless steel electric heating tube annealing equipment of the present invention.

[0029] Figure 8 The refrigeration mechanism of the stainless steel electric heating tube annealing equipment of the present invention is a three-dimensional Figure 1 .

[0030] Fig. 9 The refrigeration mechanism of the stainless steel electric heating tube annealing equipment of the present invention is a three-dimensional Figure 2 .

[0031] Fig.10 The refrigeration mechanism of the stainless steel electric heating tube annealing equipment of the present invention is three-dimensional Figure 3 .

[0032] The corresponding relationship between the illustrations and component names in the figure is as follows: 1. Workbench; 2. Mounting plate; 21. Slide bar; 22. Slide plate; 23. Slider; 231. Connecting piece; 232. Infrared thermometer; 3. Metal connecting belt; 31. Telescopic plug rod; 4. Heating assembly; 41. Fixed clamp block; 411. First heating block; 42. Connecting plate; 421. Cylinder; 422. Moving clamp block; 423. Second heating block; 5. Cooling tank; 51. Cooling pipe; 52. Grille; 53. Discharge port; 54. Hook; 6. Gear regulator; 7. Power control box; 8. Bracket; 81. Condenser; 811. Input pipe; 82. Water pump; 83. Condenser; 831. First connecting pipe; 832. Second connecting pipe; 84. Piston compressor; 841. Output pipe; 842. Connecting pipe; 85. Storage tank; 86. Radiator. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0036] Figure 1-4 This is a structural diagram of the annealing equipment for stainless steel electric heating tubes in this embodiment. The annealing equipment in this embodiment includes a workbench 1, and a mounting plate 2 is symmetrically provided in the center of the upper surface of the workbench 1. Slide rods 21 are symmetrically provided between the mounting plates 2. A pair of slide plates 22 are slidably connected to the slide rods 21, and a heating component 4 is mounted on the slide plate 22. The heating component 4 in this embodiment can be distance-controlled by sliding the slide plate 22 on the slide rod 21 to process stainless steel electric heating tubes of different diameters and lengths, thereby improving the versatility and applicability of the equipment. By adjusting the distance between the annealing heating components, heating of different length sections of the stainless steel electric heating tube can be achieved.

[0037] See also Figure 6 The heating assembly 4 in this embodiment includes a fixed clamping block 41 fixed to one end of the upper surface of the slide plate 22, a notch is cut on one side of the upper end of the fixed clamping block 41, and a first heating block 411 is installed in the notch. A connecting plate 42 is fixed to the other end of the upper surface of the slide plate 22. The connecting plate 42 is an L-shaped structure. A cylinder 421 is installed on the outer side of the connecting plate 42. A movable clamping block 422 is slidably provided on the inner side of the connecting plate 42, and the output end of the cylinder 421 passes through the connecting plate 42 and is connected to the movable clamping block 422. A notch is opened at the end of the movable clamping block 422 opposite to the fixed clamping block 41. , and a second heating block 423 is installed in the notch. In this embodiment, the cylinder 421 controls the movement of the movable clamping block 422 on the connecting plate 42, so that the distance between the second heating block 423 and the first heating block 411 on the fixed clamping block 41 is controlled by the displacement of the movable clamping block 422, so that the first heating block 411 and the second heating block 423 clamp the stainless steel electric heating tube, and a passage is formed after clamping to heat the stainless steel electric heating tube. In order to better control the current passing through the first heating block 411 and the second heating block 423, please refer to Figure 7In this embodiment, a power control box 7 is provided at the other end of the workbench 1. The cylinder 421, the movable clamp block 422 and the fixed clamp block 41 are all provided with wires to connect with the power control box 7 for signal. The power control box 7 adopts the control elements commonly used in the prior art withdrawal equipment. A gear voltage regulator 6 is also provided in the workbench 1, and the signal connection between the gear voltage regulator 6 and the power control box 7 also belongs to the prior art. Its function is to control the electrical components inside the power control box 7 without opening the power control box 7, thereby improving safety. In this embodiment, the movable clamp block 422 and the fixed clamp block 41 are controlled by the gear voltage regulator 6. Current input of the clamp block 41; further, in order to realize the current flow to heat the stainless steel electric heating tube, in this embodiment, wires are provided on the sides of the fixed clamp block 41 and the movable clamp block 422 on the same slide plate 22 for connection. After the heating components 4 on the two slide plates 22 are connected to the power control box 7 signal, although the heating components 4 are connected to the control electrical components inside the power control box 7, the whole is in an open circuit state. The stainless steel electric heating tube is placed behind the two heating components 4, so that the two heating components 4 are electrically conductive. Since the resistance of the stainless steel electric heating tube is too high, it will be heated due to the high resistance.

[0038] See also Figure 1 and Figure 7 In this embodiment, a cooling tank 5 is installed on one side of the workbench 1. The cooling tank 5 is a water tank with a cooling solution built in. A cooling pipe 51 is provided at the bottom of the cooling tank 5. Both ends of the cooling pipe 51 pass through the cooling tank 5 and extend into the workbench 1. In this embodiment, the annealed stainless steel electric heating tube is cooled by the cooling tank 5 to optimize the microstructure of the stainless steel electric heating tube and improve its mechanical properties. Further, in order to facilitate the removal of the stainless steel electric heating tube, a grille 52 is provided in the cooling tank 5 and above the cooling pipe 51. The grille 52 separates the cooled stainless steel electric heating tube from the cooling pipe 51 to prevent the stainless steel electric heating tube from being too close to the cooling pipe 51 during cooling, thereby causing uneven cooling of the stainless steel electric heating tube. At the same time, in this embodiment, a discharge port 53 is opened at the bottom of the cooling tank 5 for replacing the cooling solution. The discharge port 53 is sealed by a valve. A plurality of hooks 54 are fixed to the side of the workbench 1 at equal intervals by screws. The hooks 54 are of a Z-shaped structure. The cooling tank 5 is placed on the hooks 54 to form an integral structure with the workbench 1.

[0039] See also Figure 8-10In order to better control the temperature of the solution in the cooling tank 5, a refrigeration mechanism is installed in the workbench 1 in this embodiment, and the two ends of the cooling pipe 51 are respectively connected to the input end and the output end of the refrigeration mechanism. The refrigeration mechanism includes a bracket 8, and a condenser 81 is placed on one end of the upper surface of the bracket 8. The upper surface of the condenser 81 is connected to an input pipe 811, and the end of the input pipe 811 is connected to one end of the cooling pipe 51. The lower surface of the condenser 81 is connected to a water pump 82 through a pipeline, and the output end of the water pump 82 is connected to a radiator 86 through a pipeline. The output end of the radiator 86 is connected to a condenser 83, and the output end of the condenser 83 is connected in series with a plurality of storage tanks 85, and the upper ends of the storage tanks 85 are commonly connected to a piston compressor 84. The output end of the piston compressor 84 is connected to an output pipe 841, and the end of the output pipe 841 is connected to the other end of the cooling pipe 51. In this embodiment, the coolant of the refrigeration mechanism is pumped out of the output pipe 841 through the piston compressor 84, and the coolant is fed into the cooling pipe 51 inside the cooling tank 5 through the output pipe 841, thereby cooling the solution in the cooling tank 5. After absorbing heat in the cooling pipe 51, the coolant enters the condenser 81 through the input pipe 811 under pressure for preliminary heat dissipation. After the preliminary heat dissipation, the coolant is sent to the radiator 86 through the water pump 82 for secondary cooling. Then the coolant is cooled through the condenser 83, and the cooled condensed liquid enters the storage tank 85 for storage and waiting for circulation.

[0040] It is worth noting that in order to better control the coolant, a first connecting pipe 831 is provided between the radiator 86 and the condenser 83 of this embodiment for connection. The first connecting pipe 831 is equipped with a valve for flow control. A second connecting pipe 832 is provided at the output end of the condenser 83 for connection with the storage tank 85. The second connecting pipe 832 is externally connected to a flow detector for detecting the sealing property and pressure of the coolant. A connecting pipe 842 is provided between the storage tank 85 and the piston compressor 84. The connecting pipe 842 can also be externally connected to a flow detector to monitor the flow of the coolant.

[0041] See also Figure 4Considering that a stainless steel electric heating tube with a long length may bend when placed, a metal connecting belt 3 is provided in the center of the upper surface of the workbench 1 in this embodiment. Ceramic pads are provided at both ends and the center of the metal connecting belt 3. A telescopic plug rod 31 is slidably connected to the metal connecting belt 3. In this embodiment, the stainless steel electric heating tube with a long length is supported by the telescopic plug rod 31 with an adjustable height. Further, the telescopic plug rod 31 is composed of a fixed rod and a telescopic rod. The fixed rod is a hollow structure. The telescopic rod is inserted into the fixed rod. Multiple holes are provided on the sides of the fixed rod and the telescopic rod. A through hole is formed, and when the through holes on the fixed rod and the telescopic rod overlap, they are fixed by screws. By lifting the telescopic rod, the through holes on the telescopic rod overlap with the through holes at different heights on the fixed rod, and are fixed with screws, thereby realizing the height adjustment of the telescopic plug rod 31, and the metal connecting belt 3 is connected to the power control box 7 for signal connection through a wire, so that the metal connecting belt 3 can also be heated, and the heat is transferred to the telescopic plug rod 31, preventing the stainless steel electric heating tube being heated from contacting the telescopic plug rod 31 and causing the temperature to drop, and the ceramic pad plays the role of thermal insulation.

[0042] See also Figure 5 In order to monitor the temperature of the heated stainless steel electric heating tube, in this embodiment, a slider 23 is slidably connected to one of the slide bars 21, and a connecting piece 231 is welded to the inner side of the slider 23. A waist hole is opened at the upper end of the connecting piece 231, and an infrared thermometer 232 is inserted into the waist hole. In this embodiment, the temperature is detected by the infrared thermometer 232, and the slider 23 can slide on the slide bar 21, so that the infrared thermometer 232 can be displaced, thereby comprehensively detecting the stainless steel electric heating tube in the heating section. Furthermore, in this embodiment, a nut is threadedly connected to the front end of the infrared thermometer 232, and a stopper is fixedly sleeved on the end of the infrared thermometer 232. By rotating the nut clockwise, the connecting piece 231 is clamped by the nut and the stopper, so that the infrared thermometer 232 is fixed in the waist hole. Conversely, by rotating the nut counterclockwise, the nut loses its resistance to the connecting piece 231, and the infrared thermometer 232 can be displaced up and down at a certain height in the waist hole, thereby realizing the adjustment of the installation height of the infrared thermometer 232.

[0043] According to the above-mentioned equipment, the present application also provides a method for using the equipment for annealing a stainless steel electric heating tube.

[0044] A method for annealing a stainless steel electric heating tube, the specific steps are as follows: Step 1: Manually adjust the distance between a pair of slides 22 according to the length of the stainless steel electric heating tube, specifically: push and pull the slide 22 to slide on the slide bar 21, so that the distance between the heating components 4 on the pair of slides 22 can be suitable for the stainless steel electric heating tube that needs to be heated and annealed, and start the equipment. After the equipment is powered on, operate the gear regulator 6 as needed to control the current entering the heating component 4 through the gear regulator 6. The heating component 4 is in an open circuit state at this time; Step 2: Roughly adjust the distance between the first heating block 411 and the second heating block 423 according to the diameter of the stainless steel electric heating tube, place the stainless steel electric heating tube between the first heating block 411 and the second heating block 423, and control the movement of the movable clamping block 422 for a second time, so that the first heating block 411 and the second heating block 423 clamp the stainless steel electric heating tube. At this time, the heating assembly 4 will provide you with a passage due to the addition of the stainless steel electric heating tube, so that the stainless steel electric heating tube is heated; Step 3: After being heated, the stainless steel electric heating tube is taken out and placed in a cooling tank 5 for cooling. The temperature of the cooling tank 5 is adjusted by a refrigeration mechanism, so as to optimize the physical properties of the stainless steel electric heating tube by using different temperatures.

[0045] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the scope of protection determined by the claims submitted for the present invention.

Claims

1. A stainless steel electric heating tube annealing device, comprising a workbench (1), wherein a mounting plate (2) is symmetrically arranged in the center of the upper surface of the workbench (1), and slide bars (21) are symmetrically arranged between the mounting plates (2), and a pair of slide plates (22) are slidably connected to the slide bars (21), and a heating component (4) is mounted on the slide plates (22). Features: The heating assembly (4) comprises a fixed clamping block (41) fixed to one end of the upper surface of the slide plate (22), a notch cut on one side of the upper end of the fixed clamping block (41), a first heating block (411) being mounted in the notch, a connecting plate (42) being fixed to the other end of the upper surface of the slide plate (22), the connecting plate (42) being an L-shaped structure, a cylinder (421) being mounted on the outer side of the connecting plate (42), a movable clamping block (422) being slidably mounted on the inner side of the connecting plate (42), and an output end of the cylinder (421) passing through the connecting plate (42) and connected to the movable clamping block (422), a notch being formed at one end of the movable clamping block (422) opposite to the fixed clamping block (41), a second heating block (423) being mounted in the notch, a metal connecting belt (3) being centrally disposed on the upper surface of the workbench (1), a telescopic plug rod (31) being slidably connected to the metal connecting belt (3); A cooling trough (5) is provided on one side of the workbench (1), a cooling pipe (51) is provided at the bottom of the cooling trough (5), both ends of the cooling pipe (51) pass through the cooling trough (5) and extend into the workbench (1), a refrigeration mechanism is provided in the workbench (1), and both ends of the cooling pipe (51) are respectively connected to the input end and the output end of the refrigeration mechanism, and an electric power control box (7) is provided at the other end of the workbench (1).

2. The stainless steel electric heating tube annealing equipment according to claim 1 is characterized by: The refrigeration mechanism comprises a bracket (8), a condenser (81) is placed on one end of the upper surface of the bracket (8), an input pipe (811) is connected to the upper surface of the condenser (81), and the end of the input pipe (811) is connected to one end of the cooling pipe (51), the lower surface of the condenser (81) is connected to a water pump (82) through a pipeline, the output end of the water pump (82) is connected to a radiator (86) through a pipeline, the output end of the radiator (86) is connected to the condenser (83), the output end of the condenser (83) is connected in series with a plurality of storage tanks (85), the upper ends of the storage tanks (85) are commonly connected to a piston compressor (84), the output end of the piston compressor (84) is connected to an output pipe (841), and the end of the output pipe (841) is connected to the other end of the cooling pipe (51).

3. The stainless steel electric heating tube annealing equipment according to claim 2 is characterized in that: A first connecting pipe (831) is provided between the radiator (86) and the condenser (83) for connection, the first connecting pipe (831) being equipped with a valve, a second connecting pipe (832) is provided at the output end of the condenser (83) for connection with the storage tank (85), the second connecting pipe (832) being externally connected to a flow detector, and a connecting pipe (842) is provided between the storage tank (85) and the piston compressor (84).

4. The stainless steel electric heating tube annealing equipment according to claim 1, characterized in that: The cylinder (421), the movable clamping block (422) and the fixed clamping block (41) are all provided with wires for signal connection with the power control box (7); a gear voltage regulator (6) is also provided in the workbench (1), and the gear voltage regulator (6) is signal-connected with the power control box (7) for controlling the current input on the movable clamping block (422) and the fixed clamping block (41).

5. The stainless steel electric heating tube annealing equipment according to claim 4 is characterized in that: The fixed clamping block (41) and the movable clamping block (422) on the same slide plate (22) are connected by wires on their sides. The heating components (4) on the two slide plates (22) are in an open circuit state after the signal connection with the power control box (7). The stainless steel electric heating tube is placed behind the two heating components (4) so ​​that the two heating components (4) are electrically conductive.

6. The stainless steel electric heating tube annealing equipment according to claim 1, characterized in that: The metal connection belt (3) is connected to the power control box (7) by a wire for signal connection. Ceramic pads are provided at both ends and the center of the metal connection belt (3). The telescopic plug rod (31) is composed of a fixed rod and a telescopic rod. The fixed rod is a hollow structure. The telescopic rod is inserted into the fixed rod. The fixed rod and the telescopic rod are provided with a plurality of through holes on the sides. When the through holes on the fixed rod and the telescopic rod overlap, they are fixed by screws.

7. The stainless steel electric heating tube annealing equipment according to claim 1, characterized in that: A slider (23) is slidably connected to one of the slide bars (21), a connecting piece (231) is welded to the inner side of the slider (23), a waist hole is formed at the upper end of the connecting piece (231), an infrared thermometer (232) is inserted into the waist hole, a nut is threadedly connected to the front end of the infrared thermometer (232), and a stopper is fixedly sleeved at the end of the infrared thermometer (232), the nut is rotated clockwise, and the connecting piece (231) is clamped by the nut and the stopper, so that the infrared thermometer (232) is fixed in the waist hole.

8. The stainless steel electric heating tube annealing equipment according to claim 1, characterized in that: A grille (52) is provided in the cooling tank (5) and above the cooling pipe (51); a discharge port (53) is provided at the bottom of the cooling tank (5); the discharge port (53) is sealed by a valve; a plurality of hooks (54) are fixed at equal intervals on the side of the workbench (1) by screws; the hooks (54) are of a Z-shaped structure; and the cooling tank (5) is placed on the hooks (54).

9. A method for annealing a stainless steel electric heating tube, using the stainless steel electric heating tube annealing device according to any one of claims 1 to 8 for annealing, characterized in that the specific steps are as follows: Step 1: Manually adjust the distance between a pair of slide plates (22) according to the length of the stainless steel electric heating tube, and start the device; Step 2: roughly adjusting the distance between the first heating block (411) and the second heating block (423) according to the diameter of the stainless steel electric heating tube, placing the stainless steel electric heating tube between the first heating block (411) and the second heating block (423), and controlling the movement of the movable clamping block (422) for a second time so that the first heating block (411) and the second heating block (423) clamp the stainless steel electric heating tube; Step 3: After being heated, the stainless steel electric heating tube is taken out and placed in a cooling tank (5) for cooling.

10. A stainless steel electric heating tube annealing method according to claim 9, characterized in that: The temperature of the cooling tank (5) in step 3 is adjusted by a refrigeration mechanism.

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