A limiting device suitable for side-loading coal car chain

Abstract

The utility model provides a kind of limiting device suitable for side-mounted coal car chain, including chain gear protective plate, drive device is provided in chain gear protective plate, drive device includes drive chain, limit switch is symmetrically set on the vertical surface of chain gear protective plate side, two limit switches are spaced apart along vertical direction, upper limit switch is used to control front limit signal, lower limit switch is used to control front deceleration limit signal, drive chain side is provided with trigger component, the utility model replaces traditional mechanical stroke switch by magnetic proximity switch, triggers signal by non-contact magnetic induction, avoids contact pollution, jamming and false triggering caused by coal dust, coke tar, permanent magnet trigger component and drive chain are integrally designed, without external power supply, eliminate dust conduction short-circuit risk, protect device stable operation in harsh environment.

Description

Technical Field

[0001] This utility model relates to the field of side-loading coal car technology, specifically to a limiting device suitable for the chain of a side-loading coal car. Background Technology

[0002] Coking side-loading coal cars are one of the core pieces of equipment for achieving efficient and environmentally friendly production in the modern coking industry. Their design and application directly affect coke quality, production efficiency and environmental benefits. In the coking process, the coal loading car loads the compacted coal into the furnace. During this process, the deceleration limit and the front limit of the coal dragging bottom plate are crucial.

[0003] In existing technologies, limit devices mostly use mechanical limit switches, which are installed near the chain gear guard plate. This provides a basic guarantee for the coal charging car to accurately load the tamped coal into the furnace, and to a certain extent ensures the stability and continuity of the coking production process, thus meeting the basic limit control requirements of the coking industry for coal charging equipment.

[0004] However, due to the harsh working environment of coal loading cars (high temperature, coal dust and tar splashes), the limit devices are easily covered by the oil-coal mixture, causing sensor failure, false triggering, or even fire. In addition, traditional limit devices have limited installation space (e.g., mechanical limit switches require space for the swinging of the trigger rod), are difficult to maintain (e.g., the contacts of mechanical limit switches are easily covered by coal dust or stuck by tar, resulting in poor contact or jamming), and are difficult to adapt to stable operation in long-term high-temperature environments (e.g., the trigger rod and spring of the limit switch are prone to thermal expansion and deformation under long-term high temperature, resulting in trigger displacement deviation). Utility Model Content

[0005] In view of this, the present invention provides a limiting device for the chain of a side-loading coal car. It replaces the traditional mechanical limit switch with a magnetic proximity switch and uses a non-contact magnetic induction trigger signal to avoid contact contamination, jamming and false triggering caused by coal dust and tar. The permanent magnet triggering component is integrated with the drive chain, requiring no external power supply, eliminating the risk of short circuit due to dust conduction, and ensuring stable operation of the device in harsh environments.

[0006] To solve the above-mentioned technical problems, this utility model provides a limiting device for the chain of a side-loading coal car, including a chain gear protective plate, a driving device is provided inside the chain gear protective plate, and the driving device includes a driving chain. The above are all in the prior art, so there is no need to elaborate further.

[0007] Limit switches are symmetrically installed on one vertical surface of the chain gear protective plate. The limit switches are magnetic proximity switches, which are connected to the PLC controller via signal cables. The front limit and front deceleration limit are controlled by programming. The two magnetic proximity switches are distributed vertically at intervals. The upper magnetic proximity switch is used to control the front limit signal (the front limit signal is detected and triggered by the upper magnetic proximity switch, and is used to control the final stop position of the coal loading car's dragging bottom plate). The lower magnetic proximity switch is used to control the front deceleration limit signal (the front deceleration limit signal is detected and triggered by the lower magnetic proximity switch, and is used to control the early deceleration action of the coal loading car's dragging bottom plate).

[0008] A triggering component is provided on one side of the drive chain. The triggering component is a permanent magnet, which is fixedly connected to the outer chain plate of the drive chain. The movement trajectory of the triggering component corresponds to the detection area of ​​two magnetic proximity switches, which are used to cooperate with the magnetic proximity switches to realize the automatic control of the deceleration and stopping of the coal loading car.

[0009] The limit switch is connected to the base, and the base is fixedly connected to the vertical outer wall of one side of the chain gear protective plate.

[0010] The base includes a first angle iron fixedly connected to the vertical outer wall of one side of the chain gear protective plate. The first angle iron is configured as an L-shaped structure. One side of the first angle iron is fixedly connected to the vertical outer wall of one side of the chain gear protective plate. A second angle iron is fixedly connected to the vertical surface of one side of the first angle iron. A mounting frame is fixedly connected to the vertical surface of the second angle iron facing the drive chain. The sensing element of the magnetic proximity switch passes through the mounting frame and is snapped into the mounting frame (the mounting frame has a mounting hole on the vertical surface facing the drive chain, and the sensing element of the magnetic proximity switch passes through the mounting hole and is snapped into the mounting hole).

[0011] The inner cavity of the chain gear protective plate is equipped with a heat insulation layer, which is composed of multiple layers of ceramic fiber felt. The outer surface of the chain gear protective plate is coated with a high-temperature resistant and corrosion-resistant coating, which can be a ceramic-based coating.

[0012] A thermally conductive silicone pad is fixedly connected to the contact surface between the chain gear guard plate and the base.

[0013] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0014] 1. Non-contact precision control, improving reliability and stability: The magnetic proximity switch replaces the traditional mechanical limit switch. The non-contact magnetic induction trigger signal effectively avoids contact contamination, jamming, and false triggering caused by coal dust and tar adhesion. Combined with the integrated design of permanent magnet triggering component and drive chain, no external power supply is required, completely eliminating the risk of short circuit caused by dust conductivity and ensuring long-term stable operation of the device in harsh environments with high temperature and high dust.

[0015] 2. Layered and precise control to extend equipment life: Dual limit switches are vertically distributed along the drive chain track. Through a "deceleration-stop" dual-signal layered control mechanism: the lower limit triggers a deceleration command to reduce the inertial impact of the coal-carrying bottom plate; the upper limit precisely positions the stop position to avoid rigid collisions; reducing the instantaneous load impact on the drive chain and gears, preventing deformation and meshing misalignment, extending the service life of the transmission system, and ensuring the alignment accuracy of the coal loading port to reduce coal spillage.

[0016] 3. Modular installation and efficient thermal management: The base adopts a combination structure of angle iron and mounting frame, and the keyway-shaped mounting holes enable quick positioning and fine adjustment of the magnetic switch. The snap-fit ​​connection simplifies the disassembly and assembly process and improves maintenance efficiency. The chain gear protective plate is embedded with multiple layers of ceramic fiber heat insulation and covered with a high-temperature resistant ceramic base coating to block internal heat transfer and prevent electronic component failure caused by high temperature. The thermally conductive silicone pad further optimizes the heat conduction path, reduces the local temperature rise of the base, and enhances the system's high-temperature resistance.

[0017] 4. Safety and maintenance cost optimization: The non-contact detection mechanism eliminates mechanical wear and reduces maintenance frequency; the dual design of heat insulation and anti-corrosion coating avoids high-temperature oxidation and deformation of the protective plate, reducing the risk of burns; the overall structure adapts to the high-frequency vibration conditions of the side-loading coal car, reducing sensor offset failures, comprehensively reducing equipment downtime and maintenance costs, and improving the continuity and safety of coking production. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the base and its components of the present invention.

[0020] Figure 3 This is a schematic diagram of the other side of the base and its components of this utility model;

[0021] Figure 4 This is a schematic diagram of the drive chain and its components according to the present invention.

[0022] In the diagram: 101, chain and gear guard plate; 102, drive chain; 103, magnetic proximity switch; 104, signal cable; 105, permanent magnet;

[0023] 201. First angle iron; 202. Second angle iron; 203. Mounting frame. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-4The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0025] A limiting device suitable for the chain of a side-loading coal car, such as Figure 1 , 2 As shown: It includes a chain gear protective plate 101, and a driving device is provided inside the chain gear protective plate 101. The driving device includes a driving chain 102. The driving device is used to drive the driving chain 102 to rotate, thereby driving the side coal loading car to move. The above are all in the prior art, so there is no need to elaborate further.

[0026] Limit switches are symmetrically arranged on one vertical surface of the chain gear guard plate 101. The limit switches are magnetic proximity switches 103. The symmetrical arrangement of the magnetic proximity switches 103 can provide full coverage monitoring of the upper and lower running sections of the drive chain 102. Both magnetic proximity switches 103 are connected to the PLC controller through signal cables 104. The front limit and front deceleration limit can be controlled by programming. The two magnetic proximity switches 103 are distributed at intervals along the vertical direction. The use of two magnetic proximity switches 103 can form a buffer mechanism through dual limit layer control (deceleration-stop) to avoid rigid impact on the coal dragging bottom plate and reduce the failure rate of the equipment. At the same time, the vertical layout matches the movement trajectory of the drive chain 102, improving the detection accuracy.

[0027] The magnetic proximity switch 103 above is used to control the front limit signal (the front limit signal is detected by the magnetic proximity switch 103 above and is used to control the final stop position of the side coal loading car's coal-carrying bottom plate). It can accurately control the stop position of the side coal loading car, ensuring that the coal-carrying bottom plate is fully connected with the coal loading port, avoiding coal powder leakage, and meeting the strict alignment requirements of the coking process.

[0028] The magnetic proximity switch 103 below is used to control the forward deceleration limit signal (the forward deceleration limit signal is detected and triggered by the magnetic proximity switch 103 below, and is used to control the early deceleration action of the side coal loading car's dragging bottom plate), so that the side coal loading car triggers deceleration before stopping, preventing the instantaneous impact force generated by the inertial load of the drive device due to direct stopping, which would cause deformation of the drive chain 102, misalignment of gear meshing, and uncontrolled distance of the side loading car without deceleration, causing the stopping position to deviate from the coal furnace charging port, resulting in misalignment of the coal charging position, leakage, or secondary adjustment, affecting the production rhythm and increasing the cost of manual intervention, thereby protecting the connection structure of the drive chain 102 and gears.

[0029] like Figure 1 , 3As shown: A triggering component is provided on one side of the drive chain 102. The triggering component is used in conjunction with two magnetic proximity switches 103. When the side coal loading car is not triggered, the triggering component is on the side of the lower magnetic proximity switch 103 and away from the lower magnetic proximity switch 103. When the drive device is started, the side coal loading car moves towards the coal furnace side. When it is about to reach the coal loading port, the triggering component moves with the chain to the lower magnetic proximity switch 103 and triggers the forward deceleration limit signal, causing the side coal loading car to decelerate. At this time, the drive chain 102 will continue to move. When it moves to the upper magnetic proximity switch 103, it will trigger the forward limit signal, causing the side coal loading car to stop at the coal furnace loading port.

[0030] The triggering component uses a permanent magnet 105, which is fixedly connected to the outer chain plate of the drive chain 102, so that the permanent magnet 105 moves synchronously with the drive chain 102 without the need for additional power supply. When the magnetic signal generated by the permanent magnet 105 passes through the two magnetic proximity switches 103, it will trigger the magnetic proximity switches 103, so that the magnetic proximity switches 103 transmit the corresponding signal to the PLC controller in the power supply room through the signal cable 104, and make corresponding processing to solve the problem of easy jamming of the transmission mechanical contact rod.

[0031] The movement trajectory of the triggering component corresponds to the detection area of ​​the two magnetic proximity switches 103, which is used to cooperate with the magnetic proximity switches 103 to automatically control the deceleration and stopping of the coal loading car.

[0032] like Figure 2 , 3 As shown: The limit switch is connected to the base by a snap-fit ​​connection. The base is fixedly connected to the vertical outer wall of the chain gear protective plate 101 on one side. The snap-fit ​​connection allows for quick assembly and disassembly. The base provides rigid support to avoid the detection position deviation caused by vibration, and further adapts to the high-frequency reciprocating motion of the side-loading coal car.

[0033] The base includes a first angle iron 201 fixedly connected to the vertical outer wall of one side of the chain gear protective plate 101. The first angle iron 201 is L-shaped. One side of the first angle iron 201 is fixedly connected to the vertical outer wall of one side of the chain gear protective plate 101. A second angle iron 202 is fixedly connected to the vertical surface of one side of the first angle iron 201. A mounting frame 203 is fixedly connected to the vertical surface of the second angle iron 202 facing the drive chain 102. The sensing element of the magnetic proximity switch 103 passes through the mounting frame 203 and is snapped into the mounting frame 203 (the mounting frame 203 has a mounting hole on the vertical surface facing the drive chain 102, and the sensing element of the magnetic proximity switch 103 passes through the mounting hole and is snapped into the mounting hole). Thus, by using the first angle iron 201, the second angle iron 202, and the mounting frame 203, the manufacturing cost of the base can be reduced, and quick disassembly and assembly can be achieved through snapping, which is convenient for maintenance and ensures the detection accuracy and stability of the magnetic proximity switch 103.

[0034] A heat insulation layer is provided in the inner cavity of the chain gear protective plate 101 (i.e., on the inner side wall of the chain gear protective plate 101). The heat insulation layer is composed of multiple layers of ceramic fiber felt. By utilizing the high melting point of ceramic fiber felt, the internal high temperature is isolated, preventing the operator from accidentally touching the chain gear protective plate 101 and being burned. It can also protect the electronic components of the magnetic proximity switch 103.

[0035] The outer surface of the chain gear protective plate 101 is coated with a high-temperature resistant and corrosion-resistant coating. The high-temperature resistant and corrosion-resistant coating can be a ceramic-based coating, which can withstand the high-temperature environment during the operation of the side-loading coal car, preventing the chain gear protective plate 101 from oxidizing, deforming or failing due to high temperature. In addition, the coating is smooth, which can reduce dust adhesion and dirt accumulation, and is easy to clean.

[0036] A thermally conductive silicone pad is fixedly connected to the contact surface between the chain gear protective plate 101 and the base, filling the gap between the contact surface of the chain gear protective plate 101 and the base. This prevents the performance of the base and the magnetic proximity switch 103 from deteriorating or malfunctioning due to local overheating. It can also buffer the vibration during equipment operation and reduce the impact of mechanical stress on the magnetic proximity switch 103.

[0037] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A limiting device for a chain of a side-loading coal car, comprising a chain gear guard plate (101), wherein a driving device is disposed within the chain gear guard plate (101), the driving device comprising a driving chain (102), characterized in that: Limit switches are symmetrically arranged on one vertical surface of the chain gear protective plate (101). The two limit switches are distributed at intervals along the vertical direction. The upper limit switch is used to control the front limit signal, and the lower limit switch is used to control the front deceleration limit signal. A triggering component is provided on one side of the drive chain (102). The movement trajectory of the triggering component corresponds to the detection area of ​​the two limit switches, and is used to cooperate with the limit switches to realize the deceleration and stopping of the coal loading car on the automatic control side. The limit switch is a magnetic proximity switch (103), which is connected to the PLC controller via a signal cable (104). The front limit and the front deceleration limit are controlled by programming. The triggering component is a permanent magnet (105), which is connected to the outer chain plate of the drive chain (102).

2. The limiting device for side-loading coal car chains as described in claim 1, characterized in that: The limit switch is connected to the base, and the base is connected to the vertical surface of one side of the chain gear guard plate (101).

3. The limiting device for side-loading coal car chains as described in claim 2, characterized in that: The base includes a first angle iron (201) disposed on a vertical surface on one side of the chain gear protective plate (101), a second angle iron (202) disposed on one side of the first angle iron (201), and a mounting frame (203) disposed on the vertical surface of the second angle iron (202) facing the drive chain (102), and the magnetic proximity switch (103) is connected to the mounting frame (203).

4. The limiting device for side-loading coal car chains as described in claim 1, characterized in that: The inner cavity of the chain gear protective plate (101) is provided with a heat insulation layer, and the outer surface of the chain gear protective plate (101) is coated with a high-temperature resistant and corrosion-resistant coating.

5. The limiting device for side-loading coal car chains as described in claim 4, characterized in that: The contact surface between the chain gear protective plate (101) and the base is provided with a thermally conductive silicone pad.

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