Heating furnace for annealing metal wires

Abstract

According to the heating furnace for metal wire annealing, a resistance wire is arranged on the surface of the outer side of a quartz tube in a winding mode, the two ends of the resistance wire are each provided with a vertically-downward connecting end in the vertical direction, fixing holes are vertically formed in the lower portions of the two ends of the inner side of an assembling groove of a lower hearth, and the connecting ends of the resistance wire are arranged on the inner sides of the fixing holes; a thermocouple hole is formed in the center of the outer side of an assembly groove of the upper hearth in a penetrating mode, a thermocouple is arranged in the thermocouple hole in a penetrating mode, and the end partition plates comprise the inlet partition plate and the outlet partition plate. The heating uniformity of the metal wire in the quartz tube is effectively ensured, and the metal wire cannot be burnt by the resistance wire after the metal wire is in contact with the resistance wire due to the fact that the quartz tube is insulated and resistant to high temperature in the wire threading process.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal wire heating furnaces, and specifically relates to a heating furnace for annealing metal wires. Background Art

[0002] The wire drawing machine is also called a wire drawing machine or a wire drawing machine. Through the drawing process of the wire drawing machine, the wire is continuously changed from thick to thin, and the wire produced by the steel manufacturer is processed into wires whose diameter, roundness, internal metallographic structure, surface finish and straightness all meet the required raw material processing requirements.

[0003] The existing online annealing furnace for wire drawing equipment has the following main problems:

[0004] The resistance wire is a straight line. Under normal working conditions, the metal wire is placed above the resistance wire, and the lower surface of the wire is close to the resistance wire, which causes uneven heating of the wire and disordered arrangement of the crystal lattice inside the wire. The wire is easily broken when entering the next drawing process, and cannot meet the requirements of process technology.

[0005] The distance between the resistance wire and the metal wire is 5-10mm. When starting the machine, the operator needs to use a pulling tool to pull the metal wire out of the annealing furnace entrance and exit. During this wire threading process, it is easy for the metal wire to contact the resistance wire, causing the metal wire to be burned by the resistance wire.

[0006] The existing annealing furnace structure is open-covered, with extremely poor sealing. The furnace and heat insulation board have high density and high thermal conductivity, which easily causes heat loss. The resistance wire is continuously heated, which reduces its lifespan, increases power consumption, and increases production costs.

[0007] The existing thermocouple cannot measure the temperature accurately at a high temperature of 900 degrees, and is easily deformed and contacts the resistance wire, and is burned by the resistance wire. Utility Model Content

[0008] In order to solve the above problems, this paper proposes a heating furnace for annealing metal wire, wherein a furnace chamber is arranged inside the heating furnace, and heat insulation plates are arranged on the upper and lower surfaces of the furnace chamber, and end partitions are arranged at both ends of the furnace chamber, and the furnace chamber is a split furnace chamber divided into upper and lower halves, and the furnace chamber comprises an upper furnace chamber and a lower furnace chamber, and the connecting surfaces of the upper furnace chamber and the lower furnace chamber are provided with assembly grooves, and a quartz tube is embedded and horizontally penetrated between the assembly grooves, and a resistance wire is wound on the outer surface of the quartz tube, and both ends of the resistance wire are vertically connected to the end, and fixing holes are vertically arranged below the two ends of the inner side of the assembly groove of the lower furnace chamber, and the connecting end of the resistance wire is arranged inside the fixing hole. A thermocouple hole is provided through the center of the outer side of the assembly groove of the upper furnace, and a thermocouple is provided through the inside of the thermocouple hole. The end partition includes an inlet partition and an outlet partition. The center of the inlet partition is provided with a conical flare, and the center of the outlet partition is provided with a supporting circular hole. The minor diameter of the conical flare and the inner diameter of the supporting circular hole are the same as the inner diameter of the quartz tube. By improving the original outside direct heating type heating furnace to use the form of quartz tube wrapped with resistance wire for thermal insulation heating, it is effectively guaranteed that the metal wire is heated uniformly and consistently in the quartz tube. During the wire threading process, because the quartz tube is insulated and high temperature resistant, the metal wire will not be burned by the resistance wire after contacting the resistance wire.

[0009] The shape of the furnace is a long rectangular block, the upper surface of the furnace is provided with an upper insulation board, the lower surface of the furnace is provided with a lower insulation board, the outer sides of the upper insulation board, the inlet partition and the outlet partition are provided with a furnace body, the outer side of the bottom surface of the lower insulation board is provided with a furnace body mounting seat, the furnace body mounting seat is connected to the bottom surface of the furnace body, through holes are penetrated through the centers of both ends of the furnace body, the furnace body is enclosed and arranged on the outer side of the furnace and the end partitions, and a special fixing hole is provided at the bottom of the lower furnace to facilitate the fixed installation of the resistance wire, and a thermocouple is installed in the upper furnace through the penetration, so as to achieve real-time monitoring of the internal heat, and an insulation board is provided on the outer side of the furnace to keep warm and prevent the temperature outside the furnace body from being too high and causing burns.

[0010] The quartz tube is in the shape of a circular through tube, the outer diameter of the quartz tube is smaller than the diameter of the assembly groove, a resistance wire is wound on the outer side of the middle of the quartz tube, the outer diameter of the circular ring of the wound resistance wire is the same as the diameter of the assembly groove, and a metal wire is penetrated inside the quartz tube to ensure that the heating temperature of the metal wire is consistent, ensuring that the lattice crystals inside the metal wire structure are arranged in an orderly manner without defects, and will not break during the next drawing process, and the surface is smooth and shiny. In this wire threading process, because the quartz tube is insulated and high temperature resistant, the metal wire will not be burned by the resistance wire after contacting the resistance wire, which effectively ensures that the rod is heated uniformly and consistently in the annealing furnace cavity, greatly reducing the serious cracks, distortions, and large diameter deviations of the rods during the forging process, thereby improving the quality of the product.

[0011] The thermocouple is an industrial assembly type thermocouple, which penetrates from the outside of the furnace and is arranged at the temple of the furnace, and the thermocouple and the resistance wire are in contact and connected with each other.

[0012] The inlet partition and the outlet partition have the same outer contour shape, both of which are rectangular plates. The centers of the inlet partition and the outlet partition are both aligned with each other and provided with through holes. The through hole of the inlet partition is a tapered drawing port, and the through hole of the outlet partition is a supporting circular hole. The front end of the feed inlet is a conical surface that serves as a guide, and the rear end is a straight surface that serves as a positioning support. Under the production state, when the metal bar enters the annealing furnace feed inlet, it enters the furnace along the guidance of the conical surface to ensure that the bar is in the center position of the furnace.

[0013] The material of the heating wire is HRE high temperature resistance wire, the power of the heating wire is 3KW, and the diameter of the resistance wire is 6mm.

[0014] Beneficial effects:

[0015] The resistance wire of this structure is spiral-shaped. Under normal working conditions, the metal wire is set in the quartz tube and coincides with the axis. The metal wire is heated 360 degrees without dead angles by the resistance wire, which effectively ensures the uniform heating consistency of the metal wire in the quartz tube, ensures that the lattice crystals inside the metal wire structure are orderly arranged without defects, and the wire will not break when entering the next drawing process, and the surface is smooth and shiny, which fully and effectively meets the process technology requirements;

[0016] This structure is provided with a quartz tube separating the metal wire and the resistance wire. The quartz tube is a quartz glass tube resistant to high temperature of 1250 degrees. The spiral resistance wire is arranged on the outer surface of the quartz tube. When the operator starts the machine to thread the wire, he can pull it out from the entrance of the annealing furnace without auxiliary traction tools. In this threading process, the quartz tube is insulated and resistant to high temperature, so the metal wire will not be burned by the resistance wire after it contacts the resistance wire, which effectively ensures the uniform heating consistency of the rod in the annealing furnace cavity, greatly reduces the serious cracks, distortion, large diameter deviation and other situations of the rod in the forging process, and improves the quality of the product;

[0017] The annealing furnace inlet of this structure has a conical surface at the front end to serve as a guide, and a straight surface at the rear end to serve as a positioning support. Under production conditions, when the metal bar enters the annealing furnace inlet, it enters the furnace along the guidance of the conical surface to ensure that the bar is in the center position of the furnace.

[0018] A special fixing hole is provided at the bottom of the lower furnace to facilitate the fixed installation of the resistance wire, and a thermocouple is installed through the upper furnace to enable real-time monitoring of the internal heat. An insulation board is provided on the outside of the furnace to prevent the temperature outside the furnace from being too high and causing burns. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of an explosion of a heating furnace for annealing metal wire;

[0020] Figure 2 is a cross-sectional view of a heating furnace for annealing metal wire;

[0021] In the figure; 1, quartz tube, 2, resistance wire, 3, thermocouple, 4, inlet partition, 5, outlet partition, 6, lower furnace, 7, upper furnace, 8, lower insulation board, 9, upper insulation board, 10, furnace body, 11, furnace body mounting base, 12, metal wire. DETAILED DESCRIPTION

[0022] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0023] Quartz tube 1, resistance wire 2, thermocouple 3, inlet partition 4, outlet partition 5, lower furnace 6, upper furnace 7, lower heat insulation board 8, upper heat insulation board 9, furnace body 10, furnace body mounting seat 11, metal wire 12.

[0024] like Figure 1 , 2 As shown;

[0025] A heating furnace for annealing metal wire, wherein a furnace chamber is provided inside the heating furnace, and heat insulation plates are provided on the upper and lower surfaces of the furnace chamber, and end partitions are provided at both ends of the furnace chamber, wherein the furnace chamber is a split furnace chamber divided into upper and lower halves, and the furnace chamber comprises an upper furnace chamber 7 and a lower furnace chamber 6, and the connecting surfaces of the upper furnace chamber 7 and the lower furnace chamber 6 are provided with assembly grooves, and a quartz tube 1 is provided between the assembly grooves in an embedded and transverse manner, and a resistance wire 2 is provided on the outer surface of the quartz tube 1 in a wound manner, and both ends of the resistance wire 2 are vertically downwardly connected to the end, and the lower ends of the inner side of the assembly groove of the lower furnace chamber 6 are vertically A fixing hole is provided, and a connecting end of a resistance wire 2 is provided inside the fixing hole. A thermocouple 3 hole is provided through the center of the outer side of the assembly groove of the upper furnace 7, and a thermocouple 3 is provided through the inside of the thermocouple 3 hole. The end partition includes an inlet partition 4 and an outlet partition 5. The center of the inlet partition 4 is provided with a conical flare, and the center of the outlet partition 5 is provided with a supporting circular hole. The minor diameter of the conical flare and the inner diameter of the supporting circular hole are the same as the inner diameter of the quartz tube 1. The shape of the furnace is a long rectangular block, and an upper heat insulation board 9 is provided on the upper surface of the furnace, and a lower heat insulation board 9 is provided on the lower surface of the furnace. Insulation board 8, a furnace body 10 is arranged on the outer side of the upper insulation board 9, the inlet partition 4 and the outlet partition 5, a furnace body mounting seat 11 is arranged on the outer side of the bottom surface of the lower insulation board 8, and the furnace body mounting seat 11 is connected to the bottom surface of the furnace body 10, and through holes are penetrated through the centers of both ends of the furnace body 10. The furnace body 10 is arranged on the outer side of the furnace chamber and the end partition in an outwardly packaged manner. The quartz tube 1 is in the shape of a circular through tube, and the outer diameter of the quartz tube 1 is smaller than the diameter of the assembly groove. A resistance wire 2 is wound on the outer side of the middle part of the quartz tube 1, and the outer diameter of the circular ring of the wound resistance wire 2 is equal to the diameter of the assembly groove. The interior of the quartz tube 1 is penetrated by a metal wire 12, the thermocouple 3 is an industrial assembly type thermocouple 3, the thermocouple 3 penetrates from the outside of the furnace and is arranged at the temporal part of the furnace, the thermocouple 3 is in contact with the resistance wire 2 and is connected to each other, the outer contours of the inlet partition 4 and the outlet partition 5 are the same as each other and are both rectangular plates, the centers of the inlet partition 4 and the outlet partition 5 are both aligned with the centers of the circles and are provided with through holes, the through hole of the inlet partition 4 is a tapered drawing mouth, the through hole of the outlet partition 5 is a supporting circular hole, the material of the heating wire is HRE high temperature resistance wire 2, the power of the heating wire is 3KW, and the diameter of the resistance wire 2 is 6mm.

[0026] Implementation examples;

[0027] During use, the resistance wire 2 is first started to heat the quartz tube 1 and its interior. The quartz tube 1 heats the heat evenly, and then the metal wire 12 is passed through the inlet partition 4. The metal wire 12 is heated and heat-treated by the heat inside the quartz tube 1. The metal wire 12 is ensured to be evenly heated inside the quartz tube 1. Then the metal wire 12 is led out from the outlet partition 5, and the subsequent drawing of the metal wire 12 is completed.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heating furnace for annealing metal wire, wherein a furnace is provided inside the heating furnace, heat insulation plates are provided on the upper and lower surfaces of the furnace, and end partitions are provided at both ends of the furnace, characterized in that: The furnace chamber is a split furnace chamber divided into upper and lower halves, and the furnace chamber includes an upper furnace chamber and a lower furnace chamber. The connecting surfaces of the upper furnace chamber and the lower furnace chamber are provided with assembly grooves, and a quartz tube is embedded and horizontally penetrated between the assembly grooves. A resistance wire is wound on the outer surface of the quartz tube, and both ends of the resistance wire have connecting ends vertically pointing downward. Fixing holes are vertically provided below the two ends of the inner side of the assembly groove of the lower furnace chamber, and the connecting end of the resistance wire is provided inside the fixing hole. A thermocouple hole is provided through the center of the outer side of the assembly groove of the upper furnace chamber, and a thermocouple is penetrated inside the thermocouple hole. The end partition includes an inlet partition and an outlet partition. A conical flare is provided at the center of the inlet partition, and a supporting circular hole is provided at the center of the outlet partition. The minor diameter of the conical flare and the inner diameter of the supporting circular hole are the same as the inner diameter of the quartz tube.

2. A heating furnace for annealing a metal wire according to claim 1, characterized in that: The shape of the furnace is a long rectangular block, the upper surface of the furnace is provided with an upper insulation board, the lower surface of the furnace is provided with a lower insulation board, the outer side of the upper insulation board, the inlet partition and the outlet partition is provided with a furnace body, the outer side of the bottom surface of the lower insulation board is provided with a furnace body mounting seat, the furnace body mounting seat is connected to the bottom surface of the furnace body, the centers of both ends of the furnace body are provided with through holes, and the furnace body is externally arranged on the outer side of the furnace and the end partitions.

3. A heating furnace for annealing a metal wire according to claim 1, characterized in that: The quartz tube is in the shape of a circular through tube, the outer diameter of the quartz tube is smaller than the diameter of the assembly groove, a resistance wire is wound around the outer side of the middle of the quartz tube, the outer diameter of the circular ring of the wound resistance wire is the same as the diameter of the assembly groove, and a metal wire is penetrated inside the quartz tube.

4. A heating furnace for annealing a metal wire according to claim 1, characterized in that: The thermocouple is an industrial assembly type thermocouple, which penetrates from the outside of the furnace and is arranged at the temple of the furnace, and the thermocouple and the resistance wire are in contact and connected with each other.

5. The heating furnace for annealing a metal wire according to claim 1, characterized in that: The inlet partition and the outlet partition have the same outer contour shape, both are rectangular plates, and the centers of the inlet partition and the outlet partition are aligned with each other and are provided with through holes. The through hole of the inlet partition is a tapered drawing hole, and the through hole of the outlet partition is a supporting circular hole.

6. A heating furnace for annealing a metal wire according to claim 1, characterized in that: The material of the resistance wire is HRE high temperature resistance wire, the power of the resistance wire is 3KW, and the diameter of the resistance wire is 6mm.

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