Scraper slag conveyor chain monitoring device

Abstract

A chain monitoring device of a submerged scraper conveyor comprises an induction detection disc, a protection probe and a control system, a plurality of monitoring holes are evenly distributed in the circle of the outer edge of the induction detection disc, and the induction detection disc is connected to an external main shaft of a guide wheel on the non-driving side of the submerged scraper conveyor. A protection probe support is in bridge connection with the outer side of the induction detection disc on a guide wheel on the non-driving side of the submerged chain conveyor, round holes are formed in the positions, corresponding to operation of the monitoring holes, of the two ends of the protection probe support, a protection probe is installed in each round hole, an indicator lamp is connected to the protection probe, and a wire connected with the protection probe is connected to a control system. The control system comprises a relay and a DCS clamping piece, the protection probe collects the operation condition of a guide wheel on the non-driving side of the submerged chain conveyor to drive the relay, and the relay sends a detection signal to the DCS clamping piece. After the device is installed, the operation condition of the chain of the slag salvaging machine can be directly observed, an alarm can be timely given out and the machine is stopped when the chain of the scraper has defects, and the possibility of defect expansion is effectively reduced, so that the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of slag removal equipment, in particular to a chain monitoring device for a scraper slag remover. Background Art

[0002] In the slag removal system of thermal power plants, scraper slag removers are important auxiliary equipment of thermal power plants. The conveying chain of scraper slag removers works in a high-temperature ash and slag environment with a large amount of water cooling for a long time. In such an environment, the scrapers and chains of the drawing and rolling mill are prone to abnormal conditions such as overlapping, chain derailment, and chain breakage during long-term operation. Once the break is not discovered in time, it will increase the difficulty of maintenance and even require shutdown. Therefore, the maintenance time is urgent and a large amount of manpower and material resources need to be invested in emergency repairs. The actual operation of the slag remover cannot be intuitively judged on site. Simply relying on other control protections cannot timely detect whether the scraper running speed is normal. At the same time, it is impossible to avoid the serious consequences caused by long-term operation after scraper overlap and chain breakage. Summary of the invention

[0003] In order to solve the above problems, the utility model provides a scraper slag machine chain monitoring device which can detect the chain running state in time.

[0004] The technical solution adopted by this utility model:

[0005] A chain monitoring device for a scraper slag collector comprises an induction detection disk, a protection probe and a control system. A plurality of monitoring holes are evenly distributed around the outer edge of the induction detection disk. The induction detection disk is connected to the external main shaft of a non-driving side guide wheel of the slag collector. A protection probe bracket is bridged on the outside of the induction detection disk on the non-driving side guide wheel of the slag collector. Circular holes are formed at both ends of the protection probe bracket corresponding to the positions where the monitoring holes operate. A protection probe is installed in each circular hole. An indicator light is connected to the protection probe. The wire connected to the protection probe is connected to the control system. The control system comprises a relay and a DCS card. The protection probe collects the operating conditions of the non-driving side guide wheel of the slag collector to drive the relay, and the relay sends the detection signal to the DCS card.

[0006] The protection probe consists of 2 10-60V DC two-wire proximity switch.

[0007] The induction detection plate is evenly distributed with 12 monitoring holes.

[0008] The distance between the protection probe installed on the protection probe bracket and the induction detection disk is less than 8 mm.

[0009] The aperture of the monitoring hole is

[0010] Both ends of the protection probe bracket are connected with folded edges connected to the non-driving side guide wheel of the slag scooper, and the folded edges are fastened to the non-driving side guide wheel of the slag scooper by bolts.

[0011] The beneficial effects of the utility model are as follows: after the installation of the utility model, it is convenient to visually observe the operating condition of the slag remover chain. When a defect occurs in the scraper chain, an alarm can be issued in time and the scraper can be shut down, effectively reducing the possibility of the defect expanding, thereby improving work efficiency. The utility model has a simple structure and is easy to manufacture. Compared with other speed protections, it has a low cost and is sturdy and durable, easy to maintain, and spare parts are easy to purchase and replace. The device has a wide range of applications and is not limited to slag remover chain break protection, but can also be applied to other chain protections. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 It is a top view of the utility model.

[0014] Among them: 1-induction detection plate; 2-monitoring hole; 3-protection probe bracket; 4-protection probe; 5-indicator light; 6-guide wheel on the non-driving side of the slag remover; 7-external main shaft; 8-conducting wire. DETAILED DESCRIPTION

[0015] A chain monitoring device for a scraper slag collector comprises an induction detection disk 1, a protection probe 4 and a control system. A plurality of monitoring holes 2 are evenly distributed around the outer edge of the induction detection disk 1. The induction detection disk 1 is connected to an external spindle 7 of a non-driving side guide wheel 6 of the slag collector. The induction detection disk 1 is a 300 mm cast iron disk. A protection probe bracket 3 is bridged on the outer side of the induction detection disk 1 on the non-driving side guide wheel 6 of the slag collector. Circular holes are provided at both ends of the protection probe bracket 3 corresponding to the positions where the monitoring holes 2 operate. A protection probe 4 is installed in each circular hole. An indicator light 5 is connected to the protection probe 4. A wire 8 connected to the protection probe 4 is connected to the control system. The control system comprises a relay and a DCS card. The protection probe 4 collects the operating status of the non-driving side guide wheel 6 of the slag collector to drive the relay. The relay sends the detection signal to the DCS card, and determines whether the chain is broken through a 2-out-of-2 logic, and sends a trip command after a delay of 1 minute.

[0016] The induction detection plate 1 is evenly distributed with 12 monitoring holes 2, and the aperture of the monitoring holes 2 is Used to protect the detection signal of probe 4.

[0017] The distance between the protection probe 4 installed on the protection probe bracket 3 and the induction detection plate 1 is less than 8 mm. The protection probe 4 consists of two It is composed of a 10-60V DC two-wire proximity switch, the sensing distance is generally 2-8mm, and the distance between the protection probe 4 and the sensing detection disk 1 is less than 8mm, which is convenient for detecting the rotation of the 12 monitoring holes 2 on the sensing detection disk 1 to determine whether the chain is broken.

[0018] Both ends of the protection probe bracket 3 are connected with folded edges connected to the non-driving side guide wheel 6 of the slag scoop machine. The folded edges are fastened to the non-driving side guide wheel 6 of the slag scoop machine by bolts, so that the protection probe 4 can be detachably fixed to the outside of the induction detection disk 1, which is convenient for maintenance and replacement.

[0019] When in use, the scraper slag collector generally runs at a speed of 1-5m / min. The induction detection disk 1 rotates synchronously with the non-driving side guide wheel 6 of the scraper slag collector. The two protection probes 4 obtain the scraper running status by detecting the rotation of the 12 monitoring holes 2 on the induction detection disk 1. When the signals of the two protection probes 4 no longer change, the indicator light 5 no longer flashes for a certain period of time, and the time exceeds 1 minute, it can be considered that the chain is broken, that is, the DCS card determines the chain break through the 2-out-of-2 logic, and sends a trip command after a delay of 1 minute, and the machine can be shut down for maintenance. The device can intuitively judge the running status of the slag collector chain. If a defect occurs in the scraper chain, an alarm can be issued in time and the machine can be shut down, which effectively reduces the possibility of defect expansion, improves work efficiency, and ensures the normal operation cycle of the equipment. After using this device, a single unit can save more than 100,000 yuan and increase work efficiency by 4-5 times.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The above is a detailed description of the embodiments of the utility model, but the contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A chain monitoring device for a scraper slag machine, characterized in that: The invention comprises an induction detection plate (1), a protection probe (4) and a control system. The outer edge of the induction detection plate (1) is evenly provided with a plurality of monitoring holes (2). The induction detection plate (1) is connected to an external main shaft (7) of a guide wheel (6) on the non-driving side of the slag picker. A protection probe bracket (3) is bridged on the outside of the induction detection plate (1) on the guide wheel (6) on the non-driving side of the slag picker. Circular holes are provided at both ends of the protection probe bracket (3) corresponding to the operating positions of the monitoring holes (2). A protection probe (4) is installed in each circular hole. An indicator light (5) is connected to the protection probe (4). A wire (8) connected to the protection probe (4) is connected to the control system. The control system comprises a relay and a DCS card. The protection probe (4) collects the operating conditions of the guide wheel (6) on the non-driving side of the slag picker to drive the relay. The relay sends the detection signal to the DCS card.

2. The chain monitoring device of the scraper slag machine according to claim 1, characterized in that: The protection probe (4) is composed of two 10-60V DC two-wire proximity switch.

3. The chain monitoring device of the scraper slag machine according to claim 1, characterized in that: The induction detection plate (1) is evenly distributed with 12 monitoring holes (2).

4. The chain monitoring device of the scraper slag machine according to claim 1, characterized in that: The distance between the protection probe (4) installed on the protection probe bracket (3) and the induction detection disk (1) is less than 8 mm.

5. The chain monitoring device of the scraper slag machine according to claim 3 is characterized in that: The aperture of the monitoring hole (2) is 6. The chain monitoring device of the scraper dredger according to claim 4, characterized in that: Both ends of the protection probe bracket (3) are connected to folded edges connected to the non-driving side guide wheel (6) of the slag scoop machine, and the folded edges are fastened to the non-driving side guide wheel (6) of the slag scoop machine by bolts.

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