Bearing steel wire annealing furnace capable of recycling waste heat

Abstract

The invention relates to the technical field of bearing steel wire production, in particular to a bearing steel wire annealing furnace capable of recycling waste heat, which comprises an annealing furnace and a support fixedly mounted at the bottom of the annealing furnace, an outer furnace door is hinged to the left side of the annealing furnace through a hinge, and a heat insulation layer and an inner container are mounted in the annealing furnace. A waste heat utilization device is arranged outside the annealing furnace and comprises a heat preservation plate, a heat conduction pipe, a water outlet ring, a backflow pipe and a water inlet pipe. According to the bearing steel wire annealing furnace capable of recycling the waste heat, the water temperature can be detected through a temperature sensor in a backflow pipe, when the detected water temperature is higher than the temperature, the temperature sensor can send an electric signal to an electromagnetic valve at the joint of a water drainage pipe and the backflow pipe, and the electromagnetic valve is opened after receiving the electric signal; water in the backflow pipe can enter the drainage pipe, so that waste heat of the annealing furnace is used for heating and utilizing cooling water, and the heated cooling water can be used for cleaning equipment of a steel wire factory.

Description

Technical Field

[0001] The invention relates to the technical field of bearing steel wire production, in particular to a bearing steel wire annealing furnace capable of recovering waste heat. Background Art

[0002] Wire is a common metal material, typically made of steel. It has an elongated shape, typically with a circular cross-section, but can also have other shapes. Steel wire is widely used in various industrial and construction applications, as well as in many areas of daily life. A wire annealing furnace is equipment used to heat and treat steel wire to modify its physical properties, typically through annealing to relieve stress, increase toughness, improve workability, or improve other characteristics.

[0003] During the production and use of steel wire, annealing furnaces are often required. However, rapid temperature changes during the annealing process often cause oxidation or cracking of the steel wire. Adding preheating and anti-oxidation devices to the steel wire annealing furnace is not only complex and costly, but also inefficient in utilizing heat. Summary of the Invention

[0004] The object of the present invention is to provide a bearing steel wire annealing furnace capable of recovering waste heat, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a bearing steel wire annealing furnace capable of recovering waste heat, comprising an annealing furnace and a bracket fixedly mounted on the bottom of the annealing furnace, an outer furnace door hingedly connected to the left side of the annealing furnace by a hinge, and an insulation layer and an inner liner installed inside the annealing furnace.

[0006] The inner wall of the annealing furnace is fixedly connected with a discharge track, the bottom of the inner container is fixedly connected with a connecting plate, the bottom of the connecting plate is fixedly connected with a pulley, and the left side of the inner container is hinged with an inner furnace door through a hinge.

[0007] A waste heat utilization device is provided on the outside of the annealing furnace, and the waste heat utilization device includes an insulation plate, a heat conduction pipe, a water outlet ring, a return pipe and a water inlet pipe. The insulation plate is fixedly installed on the outer surface of the inner tank, the heat conduction pipe is installed inside the insulation plate, the water outlet ring is fixedly connected to the right end of the heat conduction pipe, the return pipe is fixedly connected to the right side of the water outlet ring, and the water inlet pipe is fixedly connected to the top of the insulation plate.

[0008] Preferably, the pulley is slidably connected to the upper surface of the discharge track, the heat conduction pipes are evenly spaced inside the insulation board and are connected to each other, the insulation board is made of rock wool board, both ends of the return pipe are connected to the water outlet ring, the top end of the water inlet pipe extends to the outside of the annealing furnace, and the bottom end of the water inlet pipe is connected to the inside of the heat conduction pipe.

[0009] Preferably, a detection box is fixedly installed on the outer surface of the return pipe, a temperature sensor is fixedly installed on the right side of the detection box, a return pipe is fixedly connected to the top of the detection box, a drain pipe is fixedly connected to the bottom of the detection box, and a water pump is installed on the outer surface of the return pipe.

[0010] Preferably, the return pipe and the drain pipe are both connected to the return pipe, and the connection between the drain pipe and the return pipe is equipped with an electromagnetic valve electrically connected to the temperature sensor. The outer surface of the detection box is equipped with an electric control switch, and the electric control switch is electrically connected to the control switch of water pump one.

[0011] Preferably, the end of the drain pipe away from the detection box is connected to a filter box, and baffle one and baffle two are fixedly connected to the left and right sides of the filter box respectively. A coarse filter box and a fine filter box are installed near the right side of the filter box, and an activated carbon box is installed near the left side of the filter box.

[0012] Preferably, two mounting plates are fixedly installed in the middle of the interior of the filter box, and the close sides of the two mounting plates are fixedly connected with telescopic springs, and the ends of the telescopic springs away from the mounting plates are fixedly connected with elastic filter screens.

[0013] Preferably, the drain pipe passes through baffle 1 and extends to the interior of the filter box. Water pump 2 is installed on the left side of the filter box. The input end of water pump 2 passes through baffle 2 and extends to the interior of the filter box.

[0014] Preferably, an insulation layer is fixedly installed inside the inner liner, a slide rail is fixedly connected to the bottom of the inner wall of the insulation layer, a guide wheel is slidably connected to the upper surface of the slide rail, and a workpiece cart is fixedly connected to the top of the guide wheel.

[0015] Preferably, a connecting pipe is fixedly connected to the right side of the front of the annealing furnace, an end of the connecting pipe away from the annealing furnace is fixedly connected to an air inlet pipe, and the connecting pipe extends between the annealing furnace and the inner container.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The bearing steel wire annealing furnace that can recover waste heat will detect the water temperature through the temperature sensor in the return pipe. When the water temperature is detected to be higher than degrees Celsius, the temperature sensor will send an electrical signal to the solenoid valve at the connection between the drain pipe and the return pipe. After receiving the electrical signal, the solenoid valve opens, allowing the water in the return pipe to enter the interior of the drain pipe, thereby utilizing the waste heat of the annealing furnace to heat the cooling water. The heated cooling water can be used for cleaning equipment in the steel wire factory.

[0017] 2. The bearing steel wire annealing furnace that can recover waste heat can introduce nitrogen into the air inlet pipe when heating the bearing steel wire. The nitrogen enters between the annealing furnace and the inner tank through the air inlet pipe and the connecting pipe, forming a protective atmosphere to prevent gas from entering the annealing furnace and prevent the bearing steel wire from being oxidized by contact with oxygen.

[0018] 3. The bearing steel wire annealing furnace which can recover waste heat, after the water flows out of the drain pipe, it will enter the inside of the filter box, and will first be filtered by the coarse filter box and the fine filter box respectively, and then the water flow will impact the elastic filter screen, continuously filtering the water flowing out of the drain pipe, and finally the discharged water will flow through the activated carbon box and be purified by the water purification activated carbon and flow to the water pump 2, and finally be discharged for use. The filtered water will not cause damage to the equipment of the steel wire factory after being used for flushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the internal structure of the annealing furnace of the present invention; Figure 3 This is a schematic structural diagram of the insulation board of the present invention; Figure 4 This is a schematic diagram of the bottom structure of the inner container of the present invention; Figure 5 It is a schematic structural diagram of the water return mechanism of the present invention; Figure 6 This is a schematic diagram of the internal structure of the filter box of the present invention; Figure 7 Schematic diagram of the cross section of the thermal insulation layer of the present invention; Figure 8 It is a cross-sectional view of the internal structure of the thermal insulation layer of the present invention.

[0021] Figure: 1, annealing furnace; 101, insulation layer; 102, liner; 103, connecting plate; 104, pulley; 105, inner furnace door; 106, insulation layer; 107, slide rail; 108, guide wheel; 109, workpiece car; 110, discharge track; 2, bracket; 3, outer furnace door; 4, air inlet pipe; 5, connecting pipe; 6, water pump 1; 601, return pipe; 602, detection box; 603, temperature sensor Filter; 604, drain pipe; 605, filter box; 6051, baffle 1; 6052, coarse filter box; 6053, fine filter box; 6054, elastic filter; 6055, telescopic spring; 6056, mounting plate; 6057, activated carbon box; 6058, baffle 2; 606, water pump 2; 607, insulation board; 608, heat pipe; 609, water outlet ring; 610, return pipe; 611, water inlet pipe. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] See also Figures 1-8 , the present invention provides a technical solution: Example 1: A bearing steel wire annealing furnace capable of recovering waste heat, comprising an annealing furnace 1 and a bracket 2 fixedly mounted on the bottom of the annealing furnace 1. An outer furnace door 3 is hingedly connected to the left side of the annealing furnace 1. An insulation layer 101 and an inner liner 102 are installed inside the annealing furnace 1. The inner wall of the annealing furnace 1 is fixedly connected to a discharge track 110, the bottom of the inner liner 102 is fixedly connected to a connecting plate 103, the bottom of the connecting plate 103 is fixedly connected to a pulley 104, the left side of the inner liner 102 is hinged with an inner furnace door 105, an insulation layer 106 is fixedly installed inside the inner liner 102, a heating tube is installed on the inner wall of the insulation layer 106, the heating tube can be controlled by an external power supply, the bottom of the inner wall of the insulation layer 106 is fixedly connected to a slide rail 107, the upper surface of the slide rail 107 is slidably connected to a guide wheel 108, and the top of the guide wheel 108 is fixedly connected to a workpiece cart 109.

[0025] A waste heat utilization device is provided on the outside of the annealing furnace 1, which includes an insulation plate 607, a heat conduction pipe 608, a water outlet ring 609, a return pipe 610 and a water inlet pipe 611. The insulation plate 607 is fixedly installed on the outer surface of the inner tank 102, the heat conduction pipe 608 is installed inside the insulation plate 607, the water outlet ring 609 is fixedly connected to the right end of the heat conduction pipe 608, the return pipe 610 is fixedly connected to the right side of the water outlet ring 609, and the water inlet pipe 611 is fixedly connected to the top of the insulation plate 607.

[0026] The pulley 104 is slidably connected to the upper surface of the discharge track 110, and the heat conduction pipes 608 are evenly spaced inside the insulation plate 607 and are connected to each other. The insulation plate 607 is made of rock wool board. Both ends of the return pipe 610 are connected to the water outlet ring 609, and the top end of the water inlet pipe 611 extends to the outside of the annealing furnace 1, and the bottom end of the water inlet pipe 611 is connected to the inside of the heat conduction pipe 608.

[0027] A detection box 602 is fixedly installed on the outer surface of the return pipe 610, and a temperature sensor 603 is fixedly installed on the right side of the detection box 602. The detection end of the temperature sensor 603 is located inside the return pipe 601. The top of the detection box 602 is fixedly connected to the return pipe 601. The end of the return pipe 601 away from the detection box 602 is connected to the input end of the water pump 6, and the output end of the water pump 6 is connected to the interior of the heat pipe 608. A drain pipe 604 is fixedly connected to the bottom of the detection box 602, and a water pump 6 is installed on the outer surface of the return pipe 601.

[0028] The return pipe 601 and the drain pipe 604 are both connected to the return pipe 610. An electromagnetic valve electrically connected to the temperature sensor 603 is installed at the connection between the drain pipe 604 and the return pipe 610. An electric control switch is installed on the outer surface of the detection box 602. The electric control switch is electrically connected to the control switch of water pump 1 6. The end of the drain pipe 604 away from the detection box 602 is connected to water pump 2 606.

[0029] When the water temperature is detected to be above 60 degrees Celsius, the temperature sensor 603 sends an electrical signal to the solenoid valve at the connection between the drain pipe 604 and the return pipe 610. The solenoid valve opens upon receiving the electrical signal, allowing the water in the return pipe 610 to enter the drain pipe 604. Water pump 2 606 is then activated to pump the water from the drain pipe 604 for use. When the water temperature is detected to be below 60 degrees Celsius, the temperature sensor 603 sends an electrical signal to the control switch of water pump 1 6. The control switch of water pump 1 6 is activated upon receiving the electrical signal, pumping the sub-temperature water into the return pipe 601. The water is then discharged from water pump 1 6 and returned to the interior of the heat transfer pipe 608, where it continues to absorb waste heat from the annealing furnace 1. The water will not enter the drain pipe 604 until its temperature exceeds 60 degrees Celsius when it passes through the detection end of the temperature sensor 603.

[0030] Example 2: Based on Example 1, the end of the drain pipe 604 away from the detection box 602 is connected to the filter box 605, and the left and right sides of the filter box 605 are fixedly connected with baffle one 6051 and baffle two 6058 respectively. The inside of the filter box 605 near the right side is respectively installed with a coarse filter box 6052 and a fine filter box 6053, and the inside of the filter box 605 near the left side is installed with an activated carbon box 6057, and the activated carbon box 6057 is filled with water purification activated carbon.

[0031] The coarse filter box 6052 and the fine filter box 6053 are respectively installed with filter screens with different filter hole diameters. The outer surfaces of the coarse filter box 6052, the fine filter box 6053 and the activated carbon box 6057 are all provided with snap-in holes. The inner wall of the filter box 605 is installed with snap-in blocks, which can be used to snap the coarse filter box 6052, the fine filter box 6053 and the activated carbon box 6057 into the filter box 605 respectively to prevent their positions from being changed by the impact of water flow.

[0032] Two mounting plates 6056 are fixedly installed in the middle of the filter box 605 , and the two mounting plates 6056 are fixedly connected to the side close to each other with a telescopic spring 6055 , and the end of the telescopic spring 6055 away from the mounting plate 6056 is fixedly connected to the elastic filter screen 6054 .

[0033] The drain pipe 604 passes through the baffle 1 6051 and extends to the interior of the filter box 605 . A water pump 2 606 is installed on the left side of the filter box 605 . The input end of the water pump 2 606 passes through the baffle 2 6058 and extends to the interior of the filter box 605 .

[0034] After flowing out of the drain pipe 604, the water will enter the interior of the filter box 605. In the filter box 605, it is first filtered by the coarse filter box 6052 and the fine filter box 6053 respectively. Then the water flow hits the elastic filter screen 6054. The water flow squeezes the elastic filter screen 6054, causing the telescopic spring 6055 on one side to be continuously squeezed. The squeezed telescopic spring 6055 contracts. When the telescopic spring 6055 on one side is squeezed to the maximum compression amount, it will rebound under the action of its own restoring force. Under the joint action of the telescopic springs 6055 on both sides and the continuous change of the water flow rate, the elastic filter screen 6054 will make a small reciprocating motion, thereby continuously filtering the water flowing out of the drain pipe 604. Finally, the discharged water flows through the activated carbon box 6057, is purified by the water purification activated carbon, and flows to the water pump 2 606, and is finally discharged for use. The filtered water will not cause damage to the equipment in the steel wire factory after being used for flushing.

[0035] Example 3: On the basis of Example 1 and Example 2, a connecting pipe 105 is fixedly connected to the right side of the front of the annealing furnace 1, and an air inlet pipe 105 is fixedly connected to the end of the connecting pipe 105 away from the annealing furnace 1. The connecting pipe 105 extends between the annealing furnace 1 and the inner tank 102. When the annealing furnace 1 heats the bearing steel wire, nitrogen can be introduced into the air inlet pipe 105. The nitrogen passes through the air inlet pipe 104 and the connecting pipe 105 and enters between the annealing furnace 1 and the inner tank 102, forming a protective atmosphere to prevent gas from entering the annealing furnace 1, and at the same time prevent the bearing steel wire from coming into contact with oxygen and being oxidized.

[0036] Working principle: When annealing the bearing steel wire, first place the bearing steel wire on the workpiece cart 109, push the workpiece cart 109 to drive the guide wheel 108 to slide on the surface of the slide rail 107, then close the inner furnace door 105, and then push the inner container 102 to drive the pulley 104 to slide on the surface of the discharge track 110, push the inner container 102 into the interior of the annealing furnace 1, close the outer furnace door 3, start the heating pipe to heat the bearing steel wire, and after heating to a certain temperature and cooling, introduce cooling water into the heat pipe 608 through the water inlet pipe 611. The cooling water flows through the inner container 102. The heat conduction pipe 608 will then enter the water outlet ring 609 and then flow through the return pipe 610. The temperature sensor 603 in the return pipe 610 will detect the water temperature. When the water temperature is detected to be higher than 60 degrees Celsius, the temperature sensor 603 will send an electrical signal to the solenoid valve at the connection between the drain pipe 604 and the return pipe 610. After receiving the electrical signal, the solenoid valve opens, allowing the water in the return pipe 610 to enter the interior of the drain pipe 604, thereby utilizing the waste heat of the annealing furnace 1 to heat the cooling water. The heated cooling water can be used for cleaning equipment in the steel wire factory.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A bearing steel wire annealing furnace capable of recovering waste heat, comprising an annealing furnace (1) and a bracket (2) fixedly mounted on the bottom of the annealing furnace (1), wherein an outer furnace door (3) is hingedly connected to the left side of the annealing furnace (1), and characterized in that: The interior of the annealing furnace (1) is provided with a heat insulation layer (101) and an inner container (102); The inner wall of the annealing furnace (1) is fixedly connected to a discharge track (110), the bottom of the inner container (102) is fixedly connected to a connecting plate (103), the bottom of the connecting plate (103) is fixedly connected to a pulley (104), and the left side of the inner container (102) is hingedly connected to an inner furnace door (105); A waste heat utilization device is provided outside the annealing furnace (1), and the waste heat utilization device includes a heat preservation plate (607), a heat conduction pipe (608), a water outlet ring (609), a return pipe (610) and a water inlet pipe (611). The heat preservation plate (607) is fixedly mounted on the outer surface of the inner tank (102), the heat conduction pipe (608) is mounted inside the heat preservation plate (607), the water outlet ring (609) is fixedly connected to the right end of the heat conduction pipe (608), the return pipe (610) is fixedly connected to the right side of the water outlet ring (609), and the water inlet pipe (611) is fixedly connected to the top of the heat preservation plate (607).

2. The bearing steel wire annealing furnace capable of recovering waste heat according to claim 1, characterized in that: The pulley (104) is slidably connected to the upper surface of the discharge track (110), the heat conduction pipes (608) are evenly spaced and distributed inside the insulation board (607) and are connected to each other, the insulation board (607) is made of rock wool board, both ends of the return pipe (610) are connected to the water outlet ring (609), the top end of the water inlet pipe (611) extends to the outside of the annealing furnace (1), and the bottom end of the water inlet pipe (611) is connected to the inside of the heat conduction pipe (608).

3. The bearing steel wire annealing furnace capable of recovering waste heat according to claim 1, characterized in that: A detection box (602) is fixedly installed on the outer surface of the return pipe (610), a temperature sensor (603) is fixedly installed on the right side of the detection box (602), a return pipe (601) is fixedly connected to the top of the detection box (602), a drain pipe (604) is fixedly connected to the bottom of the detection box (602), and a water pump (6) is installed on the outer surface of the return pipe (601).

4. The bearing steel wire annealing furnace capable of recovering waste heat according to claim 3, characterized in that: The return pipe (601) and the drain pipe (604) are both connected to the return pipe (610). A solenoid valve electrically connected to the temperature sensor (603) is installed at the connection between the drain pipe (604) and the return pipe (610). An electric control switch is installed on the outer surface of the detection box (602), and the electric control switch is electrically connected to the control switch of the water pump (6).

5. The bearing steel wire annealing furnace capable of recovering waste heat according to claim 3, characterized in that: One end of the drainage pipe (604) away from the detection box (602) is connected to a filter box (605), and baffle 1 (6051) and baffle 2 (6058) are fixedly connected to the left and right sides of the filter box (605), respectively. A coarse filter box (6052) and a fine filter box (6053) are installed near the right side of the interior of the filter box (605), and an activated carbon box (6057) is installed near the left side of the interior of the filter box (605).

6. The bearing steel wire annealing furnace capable of recovering waste heat according to claim 5, characterized in that: Two mounting plates (6056) are fixedly mounted in the middle of the interior of the filter box (605), and the two mounting plates (6056) are fixedly connected to a telescopic spring (6055) on their adjacent sides, and an elastic filter screen (6054) is fixedly connected to one end of the telescopic spring (6055) away from the mounting plate (6056).

7. The bearing steel wire annealing furnace capable of recovering waste heat according to claim 6, characterized in that: The drainage pipe (604) passes through baffle 1 (6051) and extends to the interior of the filter box (605). A water pump 2 (606) is installed on the left side of the filter box (605). The input end of the water pump 2 (606) passes through baffle 2 (6058) and extends to the interior of the filter box (605).

8. The bearing steel wire annealing furnace capable of recovering waste heat according to claim 1, characterized in that: A heat-insulating layer (106) is fixedly installed inside the inner liner (102); a slide rail (107) is fixedly connected to the bottom of the inner wall of the heat-insulating layer (106); a guide wheel (108) is slidably connected to the upper surface of the slide rail (107); and a workpiece vehicle (109) is fixedly connected to the top of the guide wheel (108).

9. The bearing steel wire annealing furnace capable of recovering waste heat according to claim 1, characterized in that: A connecting pipe (105) is fixedly connected to the right side of the front of the annealing furnace (1). An end of the connecting pipe (105) away from the annealing furnace (1) is fixedly connected to an air inlet pipe (105). The connecting pipe (105) extends between the annealing furnace (1) and the inner container (102).

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