A rope slack detection device for a blast furnace charging winch

Abstract

The application discloses a rope slack detection device of a blast furnace charging winch, and belongs to the technical field of related blast furnace iron-making equipment, which comprises a fixed support, a tension spring, a spring support, a supporting shaft, a pressing iron support, a pressing iron, a pull rope, a weight, a connecting rod, a travel switch and a switch support, the fixed support, the tension spring, the spring support and the pressing iron support are all two, and the pressing iron is located below the steel wire rope. When the detection device detects that the steel wire rope is slack, the force of the steel wire rope cannot act on the travel switch, and the detection device is not prone to failure; the detection device is installed at the middle position of the steel wire rope, has high detection sensitivity, and acts in time; the initial distance between the pressing iron and the steel wire rope is controlled by setting an air bag and controlling the type and filling amount of the filling material in the air bag, the length of the pull rope is adjusted by setting a length adjusting assembly, and thus the height of the weight when the steel wire rope is normal can just make the travel switch reset, so that the detection device is relatively safe during debugging.

Description

Technical Field

[0001] This invention belongs to the technical field of blast furnace ironmaking equipment, and particularly relates to a slack rope detection device for a blast furnace charging winch. Background Technology

[0002] The blast furnace charging winch is one of the main supporting equipment for ironmaking blast furnaces. Its function is to continuously transport raw materials to the blast furnace. During blast furnace operation, the wire rope of the winch pulley often becomes slack due to factors such as the charging car being suspended above or below the ceiling. Once the wire rope of the blast furnace charging winch becomes slack, it can easily cause the wire rope to jump off the groove and the charging car to derail. In severe cases, it can lead to the charging car falling, posing a safety hazard to production and causing significant economic losses.

[0003] Therefore, a slack rope detection device is used as a safety detection device. By detecting the slack in the wire rope of the rope wheel, the electrical zero-voltage circuit of the material car winch is quickly cut off, thereby ensuring the safety of the equipment and personnel.

[0004] Existing winch slack rope detection devices mainly consist of an equal-arm lever mechanism and a limit switch. The front end of the equal-arm lever mechanism has a T-shaped structure, with the lever arm perpendicular to the center point of the rope sheave axis and installed at its lower part. The rear end of the equal-arm lever mechanism is connected to the transmission rod of the limit switch via a movable connecting rod. When the material cart winch experiences rope slack, the wire rope on the rope sheave sags due to gravity, pressing down the T-shaped part at the front end of the slack rope detection device, causing its rear end to tilt upwards, thus actuating the limit switch. The internal contacts of the limit switch open, thereby cutting off the electrical zero-voltage circuit and achieving the protection function. Its main disadvantages are:

[0005] 1. When the wire rope is slack or during maintenance and replacement, if the force exerted by the wire rope on the lever exceeds the limit of the limit switch, it can easily cause internal structural damage to the limit switch.

[0006] 2. When the material car winch experiences rope slack, the wire rope on the rope pulley sags due to gravity, and the slack first affects the middle of the wire rope. Existing slack detection devices, because they are installed at the bottom of the rope pulley, have poor detection sensitivity and serious lag.

[0007] 3. The existing slack rope detection device is installed at the bottom of the rope wheel. During normal blast furnace production, the rope wheel rotates continuously in both directions, making it difficult for maintenance personnel to repair and adjust, and also posing a great safety hazard to maintenance personnel.

[0008] It should be noted that the above content falls within the inventor's technical knowledge and does not necessarily constitute prior art. Summary of the Invention

[0009] To address the aforementioned problems, the present invention aims to provide a slack rope detection device for a blast furnace charging winch. When slack is detected, the force of the wire rope will not act on the limit switch, making the detection device less prone to failure. This detection device is installed in the middle of the wire rope, exhibiting high detection sensitivity and timely action.

[0010] To achieve the above objectives, the present invention proposes a slack rope detection device for a blast furnace charging winch. The slack rope detection device includes a fixed bracket, a tension spring, a spring bracket, a support shaft, a pressure iron bracket, a pressure iron, a pull rope, a counterweight, a connecting rod, a limit switch, and a switch bracket. There are two fixed brackets, two tension springs, two spring brackets, and two pressure iron brackets. The pressure iron is located below the wire rope.

[0011] The two ends of the support shaft are rotatably connected to two fixed brackets respectively. One end of the tension spring is installed on the fixed bracket, and the other end is installed on one end of the spring bracket. The other end of the spring bracket is fixedly connected to the support shaft. The two ends of the pressure iron are fixed on two pressure iron brackets respectively. The pressure iron brackets are fixed on the support shaft. One end of the pull rope is fixed on one of the tension springs, and the other end is fixed on the counterweight.

[0012] The limit switch is mounted on the switch bracket, and the connecting rod is rotatably connected to the counterweight. The connecting rod is mounted on the limit switch.

[0013] Furthermore, the pull rope is equipped with a length adjustment component for adjusting its length.

[0014] Furthermore, an airbag is fixed below the length adjustment component.

[0015] Furthermore, the length adjustment assembly includes an adjustment box, a pull rope passing through the adjustment box, the pull rope being fixedly connected to the top plate of the adjustment box and movably connected to the bottom plate of the adjustment box, and horizontal sliding rods arranged in an array on both sides of the adjustment box, the horizontal sliding rods on both sides of the adjustment box being staggered, a triangular block being fixed to one end of the horizontal sliding rod, and a horizontal guide shaft being vertically fixed to the other end, the guide shaft being located inside the adjustment box, the triangular block being located outside the adjustment box, a first spring being fixedly connected between the triangular block and the adjustment box, the inclined surface of the triangular block facing upward, and the tip of the triangular block facing away from the adjustment box.

[0016] Both sides of the adjustment box are fixed with a first connecting plate, which is located above the triangular block. A pressure rod for pressing the triangular block is slidably provided on the first connecting plate, and a second connecting plate is fixedly connected between the two pressure rods. The second connecting plate is located above the first connecting plate.

[0017] Furthermore, an L-shaped connecting plate is fixed on the adjustment box, the top plate of the L-shaped connecting plate is located above the second connecting plate, a drive button is rotatably provided on the top plate of the L-shaped connecting plate, and a lead screw that is threadedly engaged with the second connecting plate is fixed on the rotating shaft of the drive button.

[0018] Furthermore, the fixing bracket is fixed to a wall, ceiling, or column.

[0019] Furthermore, the pressure iron bracket and the spring bracket are distributed alternately.

[0020] Furthermore, the switch bracket is fixed to the ground.

[0021] Furthermore, the pull rope is fixed to the end of the tension spring away from the fixed bracket.

[0022] Furthermore, the connecting rod is located below the counterweight, and when the connecting rod rotates downwards, it activates the limit switch.

[0023] The slack rope detection device for a blast furnace charging winch proposed in this invention can bring the following beneficial effects:

[0024] 1. When the detection device of the present invention detects that the wire rope is slack, the force of the wire rope will not act on the limit switch, and the detection device is less prone to failure.

[0025] 2. The detection device of this invention is installed in the middle of the wire rope, and has high detection sensitivity and timely action;

[0026] 3. The detection device of the present invention controls the initial distance between the pressure iron and the wire rope by setting an air bladder and controlling the type and amount of filling material in the air bladder. The length adjustment component is set to adjust the length of the pull rope, so that the height of the counterweight can be just right to reset the limit switch when the wire rope is normal. Therefore, the detection device does not require climbing to a high position during debugging, the debugging is simple, the safety factor is high, and the maintenance and debugging are safe and convenient. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0028] Figure 1 This is a schematic diagram of the structure of the detection device of the present invention working in conjunction with the rope wheel.

[0029] Figure 2 This is a schematic diagram of the detection device of the present invention.

[0030] Figure 3 This is a partial structural schematic diagram of the detection device of the present invention.

[0031] Figure 4 This is a partial structural schematic diagram of the detection device of the present invention.

[0032] Figure 5This is a partial structural schematic diagram of the detection device of the present invention. Detailed Implementation

[0033] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples.

[0034] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] An embodiment of the present invention provides a slack rope detection device for a blast furnace charging winch. The blast furnace charging winch includes a winch body, a wire rope, a rope pulley, and a charging car. Figure 1-3 As shown, one end of the wire rope is fixed to the material cart, and the other end is fixed to the winch body. The wire rope passes over the top of the rope pulley. The slack rope detection device includes a fixed bracket 1, a tension spring 2, a spring bracket 3, a support shaft 4, a pressure iron bracket 5, a pressure iron 6, a pull rope 7, a counterweight 8, a connecting rod 9, a limit switch 10, and a switch bracket 11. There are two fixed brackets 1, two tension springs 2, two spring brackets 3, and two pressure iron brackets 5.

[0039] The pressure iron 6 is located below the steel wire rope. Two fixed supports 1 are arranged side by side. The fixed supports 1 can be fixed to the wall, ceiling, column or other fixed objects. The two ends of the support shaft 4 are rotatably connected to the two fixed supports 1 respectively. One end of the tension spring 2 is installed on the fixed support 1, and the other end is installed on one end of the spring support 3. The other end of the spring support 3 is fixedly connected to the support shaft 4. The two ends of the pressure iron 6 are fixed to the two pressure iron supports 5 respectively. The pressure iron supports 5 are fixed to the support shaft 4. The pressure iron supports 5 and the spring supports 3 are distributed crosswise.

[0040] One end of the pull rope 7 is fixed to one of the tension springs 2, and the other end is fixed to the counterweight 8. The pull rope 7 is fixed to the end of the tension spring 2 away from the fixed bracket 1.

[0041] The switch bracket 11 is fixed on the ground or other fixed object. The limit switch 10 is installed on the switch bracket 11. The connecting rod 9 is located below the counterweight 8. The connecting rod 9 is rotatably connected to the counterweight 8. The connecting rod 9 is installed on the limit switch 10. When the connecting rod 9 rotates downward, it drives the limit switch 10 to start.

[0042] The pull rope 7 is equipped with a length adjustment component 12 for adjusting its length, such as... Figure 4 , Figure 5 As shown, an airbag 13 is fixed below the length adjustment component 13. The airbag 13 can be filled with either gas or liquid.

[0043] The length adjustment assembly 12 includes an adjustment box 121. A pull rope 7 passes through the adjustment box 121 and is fixedly connected to the top plate of the adjustment box 121 and movably connected to the bottom plate of the adjustment box 121. Horizontal slide rods 122 are slidably arranged in an array on both sides of the adjustment box 121. The horizontal slide rods 122 on both sides of the adjustment box 121 are staggered. A triangular block 125 is fixed to one end of each horizontal slide rod 122, and a horizontal guide shaft 124 is vertically fixed to the other end. The guide shaft 124 is located inside the adjustment box 121, and the triangular block 125 is located outside the adjustment box 121. A first spring 126 is fixedly connected between the triangular block 125 and the adjustment box 121. The inclined surface of the triangular block 125 faces upward, and the tip of the triangular block 125 faces the side away from the adjustment box 121.

[0044] Both sides of the adjustment box 121 are fixed with first connecting plates 127. The first connecting plates 127 are located above the triangular block 125. The first connecting plates 127 are slidably provided with pressure rods 128 for pressing the triangular block 125. The two pressure rods 128 are fixedly connected to a second connecting plate 129. The second connecting plate 129 is located above the first connecting plate 127. An L-shaped connecting plate 1210 is fixed on the adjustment box 121. The top plate of the L-shaped connecting plate 1210 is located above the second connecting plate 129. A drive button 1211 is rotatably provided on the top plate of the L-shaped connecting plate 1210. A lead screw 1212 that is threadedly engaged with the second connecting plate 129 is fixed on the rotating shaft of the drive button 1211.

[0045] In use, the detection device is installed 3 meters below the wire rope at a distance of 3 meters from the rope pulley. It detects the slack of the wire rope between the winch and the rope pulley using the lever principle. When the wire rope is normal, the tension spring 2 on the fixed bracket 1 tightens the spring bracket 3. The spring bracket 3 pulls the weight 8 upward through the rope 7. The weight 8 drives the limit switch 10 through the connecting rod 9 to reset the limit switch. When the wire rope is slack, the weight of the wire rope presses on the pressure iron 6. The pressure iron 6 pushes down and drives the pressure iron bracket 5 to rotate, which in turn drives the support shaft 4 to rotate, which in turn drives the spring bracket 3 to rotate downward. During the downward rotation of the spring bracket 3, the rope is slack. When the rope is slack, the weight of the weight 8 drives the connecting rod 9 to move downward. During the downward movement of the connecting rod 9, the limit switch 10 is activated. The activation of the limit switch 10 is converted into a logic electrical signal to disconnect the electrical zero-voltage circuit of the winch, so as to quickly stop the winch and protect the safety of personnel and equipment.

[0046] If pressure already exists between the pressure iron 6 and the wire rope when the airbag 13 is empty, liquid is injected into the airbag 13. By controlling the amount of liquid injected into the airbag 13, the weight of the airbag 13 is controlled, thereby controlling the initial length of the tension spring 2. This, in turn, controls the distance between the pressure iron 6 and the wire rope when the wire rope is in normal condition. If the distance between the wire rope and the pressure iron 6 is too far when the airbag 13 is empty, a gas lighter than air, such as helium, is injected into the airbag 13 to increase its buoyancy. This shortens the initial length of the tension spring 2, causing the pressure iron 6 to move closer to the wire rope. The length adjustment component 12 is used to adjust the length of the pull rope 7, ensuring that the height of the counterweight 8 is just enough to reset the limit switch 10 when the wire rope is in normal condition. Therefore, this detection device does not require climbing to a high position during debugging, making debugging simple.

[0047] The safety factor of each item in this manual is high.

[0048] The embodiments are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0049] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A slack rope detection device for a blast furnace charging winch, comprising a fixed bracket (1), a tension spring (2), a spring bracket (3), a support shaft (4), a pressure iron bracket (5), a pressure iron (6), a pull rope (7), a counterweight (8), a connecting rod (9), a limit switch (10), and a switch bracket (11), wherein there are two fixed brackets (1), two tension springs (2), two spring brackets (3), and two pressure iron brackets (5), characterized in that... The ballast (6) is located below the wire rope; The two ends of the support shaft (4) are rotatably connected to two fixed brackets (1), one end of the tension spring (2) is installed on the fixed bracket (1), and the other end is installed on one end of the spring bracket (3). The other end of the spring bracket (3) is fixedly connected to the support shaft (4), the two ends of the pressure iron (6) are fixed on two pressure iron brackets (5), the pressure iron brackets (5) are fixed on the support shaft (4), one end of the pull rope (7) is fixed on one of the tension springs (2), and the other end is fixed on the weight (8); The limit switch (10) is mounted on the switch bracket (11), and the connecting rod (9) is rotatably connected to the counterweight (8). The connecting rod (9) is mounted on the limit switch (10). The pull rope (7) is equipped with a length adjustment component (12) for adjusting its length; An airbag (13) is fixed below the length adjustment component (12). The length adjustment assembly (12) includes an adjustment box (121), a pull rope (7) passing through the adjustment box (121), the pull rope (7) being fixedly connected to the top plate of the adjustment box (121) and movably connected to the bottom plate of the adjustment box (121), and horizontal sliding rods (122) arranged in an array on both sides of the adjustment box (121). The horizontal sliding rods (122) on both sides of the adjustment box (121) are staggered. A triangular block (125) is fixed at one end of the horizontal sliding rod (122), and a horizontal guide shaft (124) is vertically fixed at the other end. The guide shaft (124) is located inside the adjustment box (121), and the triangular block (125) is located outside the adjustment box (121). A first spring (126) is fixedly connected between the triangular block (125) and the adjustment box (121). The inclined surface of the triangular block (125) faces upward, and the tip of the triangular block (125) faces away from the adjustment box (121). The adjustment box (121) is fixed with a first connecting plate (127) on both sides. The first connecting plate (127) is located above the triangular block (125). A pressure rod (128) for pressing the triangular block (125) is slidably provided on the first connecting plate (127). A second connecting plate (129) is fixedly connected between the two pressure rods (128). The second connecting plate (129) is located above the first connecting plate (127). An L-shaped connecting plate (1210) is fixed on the adjusting box (121). The top plate of the L-shaped connecting plate (1210) is located above the second connecting plate (129). A drive button (1211) is rotatably provided on the top plate of the L-shaped connecting plate (1210). A screw (1212) that is threadedly engaged with the second connecting plate (129) is fixed on the rotating shaft of the drive button (1211).

2. The slack rope detection device for a blast furnace charging winch according to claim 1, characterized in that, The fixed bracket (1) is fixed to the wall, ceiling or column.

3. The slack rope detection device for a blast furnace charging winch according to claim 2, characterized in that, The pressure iron bracket (5) and the spring bracket (3) are distributed in a cross pattern.

4. The slack rope detection device for a blast furnace charging winch according to claim 3, characterized in that, The switch bracket (11) is fixed on the ground.

5. The slack rope detection device for a blast furnace charging winch according to claim 4, characterized in that, The pull rope (7) is fixed to the end of the tension spring (2) away from the fixed bracket (1).

6. The slack rope detection device for a blast furnace charging winch according to claim 5, characterized in that, The connecting rod (9) is located below the weight (8). When the connecting rod (9) rotates downward, it drives the limit switch (10) to start.

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