Continuous annealing equipment for bearing steel

Abstract

The utility model provides continuous annealing equipment for bearing steel, and relates to the technical field of bearing steel annealing. The front end face of the furnace body is fixedly connected with a heating furnace, the rear end face of the furnace body is fixedly connected with a temperature adjusting furnace, the front end face of the furnace body and the periphery of the heating furnace are fixedly connected with a cold-heat exchanger through bolt assemblies, the front end face of the furnace body is fixedly connected with a mounting frame, and two partition plates are welded in the furnace body. A conveying roller is rotationally clamped in the furnace body through a shaft, and the left end and the right end of the conveying roller are sleeved with a synchronous conveying belt; continuous annealing operation of bearing steel can be achieved through the conveying rollers, sprayed cooling liquid after annealing cooling is sucked out through a water suction pipe, it is avoided that accumulated liquid in the furnace body affects conveying, meanwhile cyclic utilization can be achieved, and the problems that heat loss is large, and the service life is long are solved. And cooling liquid is difficult to recycle.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing steel annealing, in particular to a continuous annealing device for bearing steel. Background Art

[0002] During the manufacturing process of bearing steel, in order to reduce the hardness, the bearing steel is usually annealed. The bearing steel is transferred to the transmission roller in the annealing furnace, and is continuously annealed after heating, primary cooling, slow cooling, and rapid cooling. Since the annealing requires the bearing steel to be heated to a certain temperature and then cooled, cooling and heating are required during this period, and the heat loss is large, and the coolant is difficult to recycle; the rapid cooling section consumes a lot of heat and cold, and it is difficult to adjust the temperature of the bearing steel before sending it out while reducing heat and cold consumption; it is difficult to fully cool and achieve uniform cooling during one cooling. Utility Model Content

[0003] The disclosed embodiment relates to a continuous annealing device for bearing steel. The continuous and uninterrupted annealing operation of the bearing steel can be achieved through conveying rollers. The coolant sprayed out after annealing and cooling is sucked out through a suction pipe to avoid liquid accumulation inside the furnace body affecting the transportation, and recycling can be achieved at the same time.

[0004] In a first aspect of the present disclosure, a continuous annealing device for bearing steel is provided, which specifically comprises: a furnace body; a heating furnace is fixedly connected to the front end face of the furnace body, a temperature regulating furnace is fixedly connected to the rear end face of the furnace body, a cold heat exchanger is fixedly connected to the front end face of the furnace body and the periphery of the heating furnace by a bolt assembly, a mounting frame is fixedly connected to the front end face of the furnace body, two partitions are welded inside the furnace body, a conveying roller is connected to the inside of the furnace body by an axis rotation, and a synchronous conveyor belt is sleeved on the left and right ends of the conveying roller; a heating roller is connected to the inside of the heating furnace by an axis rotation; The rear inlet and outlet of the heat exchanger are fixedly connected with a heat exchange tube; the heat exchange tube passes through the partition, the rear side of the heat exchange tube is fixedly connected to the rear end face of the furnace body, and the outside of the heat exchange tube is sleeved with a cooling tube; two rows of cooling nozzles are welded at the bottom of the front and rear sections of the cooling tube, a heating tube is welded at the top of the middle section of the cooling tube, and a driven gear is welded to the outside of the front end face of the cooling tube, and a synchronous chain is fixedly connected to the front side of the driven gear and the front end of the cooling tube; a motor is fixedly installed on the mounting frame, and the driving shaft of the motor is coaxially fixedly connected with the driving gear.

[0005] In at least some embodiments, a blower is installed above the temperature control furnace, and the blower is electrically connected to an external circuit controller. A protruding clamping ring is welded on the outer wall of the blower, and the clamping ring is movably clamped on the inner and outer sides of the rear wall of the furnace body.

[0006] In at least some embodiments, a protective cover is disposed on the periphery of the heating roller, the inner end surface of the protective cover is welded to the outer wall of the heating furnace, and the built-in resistor of the heating roller is connected to an external circuit controller through a circuit.

[0007] In at least some embodiments, a transverse partition is welded inside the heat exchange tube, hot water flows above the transverse partition, and cold water flows below the transverse partition. An independent heating resistor is placed outside the heat exchange tube, and the inner end surface of the independent heating resistor is attached to the outer wall of the heat exchange tube. The independent heating resistor is fixedly connected to the inside of the heating tube.

[0008] In at least some embodiments, a notch is provided at the bottom of the partition, the notch is higher than the top surface of the conveying roller, and water suction pipes are fixedly connected to the left and right sides of the furnace body, respectively, the water suction pipes are connected to an external water pump, the water outlet of the water pump is connected to the end of the cooling pipe, and fixed shafts are fixedly welded on the left and right sides of the inner wall of the furnace body, the conveying roller is movably connected to the fixed shaft, and the synchronous conveyor belt is connected to the driving shaft of the conveying motor. After the conveying motor is started by an external circuit controller, the synchronous conveyor belt is driven to rotate via the driving shaft, which can drive the conveying roller to rotate synchronously, and the bearing steel to be annealed on the conveying roller is transported to the inside of the furnace body for continuous annealing.

[0009] In at least some embodiments, the nozzle electronically controlled switch of the cooling nozzle is connected to an external circuit controller through a circuit, and the driven gear is meshed with the driving gear. After the cooling nozzle is started by the controller, the bearing steel can be cooled once through the cooling nozzle, and the cooling nozzle on the rear side is used for rapid cooling of the bearing steel to achieve continuous annealing.

[0010] The utility model provides a continuous annealing device for bearing steel, which has the following beneficial effects:

[0011] When the utility model is in use, continuous and uninterrupted annealing operation of bearing steel can be realized through the conveying rollers, and the coolant sprayed out after annealing and cooling is sucked out through the water suction pipe, so that liquid accumulation inside the furnace body is avoided to affect the conveying, and recycling can be realized at the same time.

[0012] In addition, after the blower is started, cold air is blown into the temperature control furnace to adjust the temperature of the bearing steel, while reducing the heat consumption in the rapid cooling section, and finally completing continuous annealing.

[0013] In addition, after the driven gear on the left is driven to rotate by the driving gear, the driven gear on the other side is driven to rotate through the synchronous chain, then the cooling pipe will rotate synchronously, swinging to spray coolant to achieve uniform cooling, and the cooling nozzle below can cool and supplement the bearing steel from the bottom to avoid insufficient cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0015] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0016] In the attached picture:

[0017] Figure 1 A schematic diagram of the structure of the furnace body of the present application from the front side is shown;

[0018] Figure 2 The internal structure schematic diagram of the furnace body of the present application is shown;

[0019] Figure 3 The cross-sectional structure schematic diagram of the furnace body of the present application is shown;

[0020] Figure 4 Shows this application Figure 3 A schematic diagram of a front side upward viewing angle structure;

[0021] Figure 5 A schematic diagram of a partial cross-sectional structure of a cooling pipe of the present application is shown;

[0022] Figure 6 A schematic diagram of the partial cross-sectional structure of the heat exchange tube of the present application is shown.

[0023] Reference numerals list

[0024] 1. Furnace body; 101. Partition plate; 102. Conveyor roller; 103. Fixed shaft rod; 104. Synchronous conveyor belt; 105. Water suction pipe;

[0025] 2. Heating furnace; 201. Heating roller; 202. Protective cover;

[0026] 3. Cooling pipe; 301. Cooling nozzle; 302. Heating pipe; 303. Driven gear; 304. Synchronous chain;

[0027] 4. Heat exchanger;

[0028] 5. Cold and heat exchange tube; 501. Transverse partition; 502. Independent heating resistor;

[0029] 6. Mounting frame; 601. Driving gear;

[0030] 7. Temperature control furnace; 701. Blower; 702. Snap ring. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Example: Please refer to Figures 1 to 6 :

[0033] The utility model proposes a continuous annealing device for bearing steel, comprising: a furnace body 1; a heating furnace 2 is fixedly connected to the front end face of the furnace body 1, a temperature regulating furnace 7 is fixedly connected to the rear end face of the furnace body 1, a cold heat exchanger 4 is fixedly connected to the front end face of the furnace body 1 and the periphery of the heating furnace 2 through a bolt assembly, a mounting frame 6 is fixedly connected to the front end face of the furnace body 1, two partitions 101 are welded inside the furnace body 1, a conveying roller 102 is connected to the inside of the furnace body 1 through an axis rotation, and a synchronous conveyor belt 104 is sleeved on the left and right ends of the conveying roller 102; a heating roller 201 is connected to the inside of the heating furnace 2 through an axis rotation; a cold heat exchanger The rear inlet and outlet of 4 are fixedly connected with a cold and hot exchange pipe 5; the cold and hot exchange pipe 5 passes through the partition 101, the rear side of the cold and hot exchange pipe 5 is fixedly connected to the rear end surface of the furnace body 1, and the outside of the cold and hot exchange pipe 5 is sleeved with a cooling pipe 3; two rows of cooling nozzles 301 are welded to the bottom of the front and rear sections of the cooling pipe 3, a heating pipe 302 is welded to the top of the middle section of the cooling pipe 3, and a driven gear 303 is welded to the outside of the front end surface of the cooling pipe 3, and the front side of the driven gear 303 and the front end of the cooling pipe 3 are fixedly connected with a synchronous chain 304; a motor is fixedly installed on the mounting frame 6, and the driving shaft of the motor is coaxially fixedly connected with a driving gear 601.

[0034] In the embodiments of the present disclosure, as shown in the attached Figure 5 and attached Figure 6 As shown, a baffle 501 is welded inside the heat exchange tube 5, hot water flows above the baffle 501, and cold water flows below the baffle 501. An independent heating resistor 502 is arranged outside the heat exchange tube 5, and the inner end surface of the independent heating resistor 502 is attached to the outer wall of the heat exchange tube 5. The independent heating resistor 502 is fixedly connected to the inside of the heating tube 302. When the cooling tube 3 rotates, the independent heating resistor 502 is driven to rotate, and hot water flows above the baffle 501, which can speed up the heating speed to a certain extent and reduce a certain amount of heat consumption. The heat exchange tube 5 can reduce the use of pipelines by welding the baffle 501 inside. The independent heating resistor 502 can be independently fixedly connected to the inside of the heating tube 302. After the heating tube 302 is set to a right-angle structure and lengthened, it can be closer to the bearing steel, making the slow cooling section heated to 450°C in a shorter time.

[0035] In the embodiments of the present disclosure, as shown in the attached Figure 1 and attached Figure 4 As shown, a protective cover 202 is arranged on the periphery of the heating roller 201, and the inner end surface of the protective cover 202 is welded to the outer wall of the heating furnace 2. The built-in resistor of the heating roller 201 is connected to the external circuit controller through the circuit. After starting the heating roller 201, the bearing steel can be uniformly heated while being conveyed, and the temperature of the bearing steel can be maintained when it is sent into the furnace body 1.

[0036] In the embodiments of the present disclosure, as shown in the attached Figure 4 , Attachment Figure 5 and attached Figure 6 As shown, the nozzle electronic switch of the cooling nozzle 301 is connected to the external circuit controller through the circuit, and the driven gear 303 is meshed with the driving gear 601. After the cooling nozzle 301 is started by the controller, the bearing steel can be cooled once through the cooling nozzle 301, and the cooling nozzle 301 on the rear side is used for rapid cooling of the bearing steel to achieve continuous annealing. The sprayed coolant drips into the furnace body 1 after cooling, and is sucked out through the water suction pipe 105. After filtering, the coolant can be recycled. When the left driven gear 303 is driven to rotate by the driving gear 601, the driven gear 303 on the other side is driven to rotate through the synchronous chain 304, then the cooling pipe 3 will rotate synchronously, swing to spray the coolant, and achieve uniform cooling, and the cooling nozzle 301 below can supplement the cooling of the bearing steel from the bottom to avoid insufficient cooling.

[0037] In the embodiments of the present disclosure, as shown in the attached Figure 3 As shown, a blower 701 is arranged above the temperature control furnace 7. The blower 701 is electrically connected to an external circuit controller. A protruding clamp ring 702 is welded on the outer wall of the blower 701. The clamp ring 702 is movably clamped on the inner and outer sides of the rear wall of the furnace body 1. The clamp ring 702 allows the blower 701 to rotate freely, thereby reducing the impact of the blower 701 on the furnace body 1 due to vibration when the blower 701 is working. After the bearing steel enters the rapid cooling section, the cooling pipe 3 and the cooling nozzle 301 are used to rapidly cool the bearing steel to below 100°C. After the blower 701 is started, cold air is blown into the temperature control furnace 7, thereby adjusting the temperature of the bearing steel and reducing the heat and cold consumption of the rapid cooling section, and finally completing continuous annealing.

[0038] In the embodiments of the present disclosure, as shown in the attached Figure 3As shown, a notch is provided at the bottom of the partition 101, and the notch is higher than the top surface of the conveying roller 102. The left and right sides of the furnace body 1 are respectively fixedly connected with a water suction pipe 105, and the water suction pipe 105 is connected to an external water pump. The water outlet of the water pump is connected to the end of the cooling pipe 3. The left and right sides of the inner wall of the furnace body 1 are fixedly welded with a fixed shaft rod 103, and the conveying roller 102 is movably connected to the fixed shaft rod 103. The synchronous conveyor belt 104 is connected to the driving shaft of the conveying motor. After the conveying motor is started by an external circuit controller, the synchronous conveyor belt 104 is driven to rotate via the driving shaft, and then The conveying roller 102 is driven to rotate synchronously, and the bearing steel to be annealed on the conveying roller 102 is conveyed to the inside of the furnace body 1 for continuous annealing. The speed of conveying the bearing steel and the speed of annealing can be controlled by adjusting the speed of the conveying motor through the controller. At the same time, the conveying roller 102 can realize continuous and uninterrupted annealing of the bearing steel. The coolant sprayed out after annealing and cooling is sucked out through the suction pipe 105 to avoid liquid accumulation in the furnace body 1 affecting the transportation, and at the same time, recycling can be realized. The partition 101 divides the inside of the furnace body 1 into a primary cooling section, a slow cooling section and a rapid cooling section.

[0039] The working principle of this embodiment is as follows: after the conveying motor is started by an external circuit controller, the synchronous conveyor belt 104 is driven to rotate via the driving shaft, which can drive the conveying roller 102 to rotate synchronously, and the bearing steel to be annealed on the conveying roller 102 is conveyed to the inside of the furnace body 1, and the bearing steel is heated by the heating roller 201;

[0040] After the left driven gear 303 is driven to rotate by the driving gear 601, the driven gear 303 on the other side is driven to rotate through the synchronous chain 304, so that the cooling pipe 3 will rotate synchronously and swing. After the cooling nozzle 301 is started by the controller, the bearing steel can be cooled once through the cooling nozzle 301. After entering the slow cooling section, the cooling pipe 3 drives the independent heating resistor 502 to rotate when it rotates, and the bearing steel is evenly heated. After entering the rapid cooling section, the cooling nozzle 301 on the rear side rapidly cools the bearing steel. The sprayed coolant drips into the furnace body 1 after cooling, and is sucked out through the water suction pipe 105. After filtering, the coolant can be recycled through the heat exchanger 4.

[0041] In this article, there are a few points to note:

[0042] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0043] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0044] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A continuous annealing device for bearing steel, comprising: The furnace body (1) is characterized in that: The front end face of the furnace body (1) is fixedly connected to a heating furnace (2), the rear end face of the furnace body (1) is fixedly connected to a temperature regulating furnace (7), the front end face of the furnace body (1) and the periphery of the heating furnace (2) are fixedly connected to a cold and hot exchanger (4) via a bolt assembly, the front end face of the furnace body (1) is fixedly connected to a mounting frame (6), two partitions (101) are welded inside the furnace body (1), a conveying roller (102) is rotatably connected inside the furnace body (1), and a synchronous conveyor belt (104) is sleeved on the left and right ends of the conveying roller (102); a heating roller (201) is rotatably connected inside the heating furnace (2); the rear inlet and outlet of the cold and hot exchanger (4) are fixedly connected to the cold and hot exchanger (4); The heat exchange tube (5) passes through the partition (101), the rear side of the heat exchange tube (5) is fixedly connected to the rear end face of the furnace body (1), and the outside of the heat exchange tube (5) is sleeved with a cooling tube (3); two rows of cooling nozzles (301) are welded to the bottom of the front and rear sections of the cooling tube (3), a heating tube (302) is welded to the top of the middle section of the cooling tube (3), and a driven gear (303) is welded to the outside of the front end face of the cooling tube (3), and the front side of the driven gear (303) and the front end of the cooling tube (3) are fixedly connected to a synchronous chain (304); a motor is fixedly mounted on the mounting frame (6), and the driving shaft of the motor is coaxially fixedly connected to the driving gear (601).

2. A continuous annealing device for bearing steel according to claim 1, characterized in that: A notch is provided at the bottom of the partition (101), the notch being higher than the top surface of the conveying roller (102); water suction pipes (105) are fixedly connected to the left and right sides of the furnace body (1), respectively; the water suction pipes (105) are connected to an external water pump; the water outlet of the water pump is connected to the end of the cooling pipe (3); fixed shafts (103) are fixedly welded to the left and right sides of the inner wall of the furnace body (1); the conveying roller (102) is movably connected to the fixed shaft (103); and the synchronous conveyor belt (104) is connected to the driving shaft of the conveying motor.

3. A continuous annealing device for bearing steel according to claim 2, characterized in that: A protective cover (202) is arranged on the periphery of the heating roller (201), the inner end surface of the protective cover (202) is welded to the outer wall of the heating furnace (2), and the built-in resistor of the heating roller (201) is connected to an external circuit controller through a circuit.

4. The continuous annealing equipment for bearing steel according to claim 2, characterized in that: The nozzle electric control switch of the cooling nozzle (301) is connected to an external circuit controller through a circuit, and the driven gear (303) is meshedly connected with the driving gear (601).

5. The continuous annealing equipment for bearing steel according to claim 1, characterized in that: A transverse partition (501) is welded inside the cold and heat exchange tube (5), hot water flows above the transverse partition (501), and cold water flows below the transverse partition (501). An independent heating resistor (502) is arranged outside the cold and heat exchange tube (5), the inner end surface of the independent heating resistor (502) is attached to the outer wall of the cold and heat exchange tube (5), and the independent heating resistor (502) is fixedly connected to the inside of the heating tube (302).

6. The continuous annealing equipment for bearing steel according to claim 5, characterized in that: A blower (701) is arranged above the temperature control furnace (7). The blower (701) is electrically connected to an external circuit controller. A protruding clamping ring (702) is welded on the outer wall of the blower (701). The clamping ring (702) is movably clamped on both inner and outer sides of the rear wall of the furnace body (1).

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