Chain tightness detection device for chain type mud scraper and chain type mud scraper

Abstract

The utility model provides a chain tightness detection device for a chain type mud scraper and the chain type mud scraper. The chain tightness detection device for the chain type mud scraper comprises an L-shaped support, a movable induction rod, an inductor and a lever assembly. The L-shaped support is vertically installed on the side wall, close to one side of the corresponding chain and parallel to the chain, of the sedimentation tank, and the horizontal section of the L-shaped support is used for installing the lever assembly. A vertical cavity is formed in the vertical section of the L-shaped support and used for containing a movable induction rod capable of moving up and down, and an induction plate is arranged at the top end of the induction rod. The inductor is installed at the top end of the L-shaped support. A notch communicated with the vertical cavity is formed in the vertical section of the L-shaped support. The lever assembly comprises a support and a lever, the driving end of the lever is located in the middle below the upper-layer chain, and the driven end penetrates through the notch to make contact with the bottom of the movable induction rod. According to the chain tightness detection device, the tightness of the chain is automatically sensed, errors and hysteresis caused by manual detection are avoided, the detection efficiency is improved, and potential safety hazards of workers are eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of chain tightness detection, in particular to a chain tightness detection device for a chain scraper and the chain scraper. Background Art

[0002] Chain scrapers, a commonly used sewage treatment equipment, play a vital role in many industrial wastewater treatment facilities. The main function of this equipment is to remove scum from the water surface and scrape off sludge deposited on the bottom of the tank from underwater, ensuring clean water quality. Chain scrapers typically consist of a series of key components, including a driving sprocket, a driven sprocket, a chain, and scrapers. The core working principle of a chain scraper is to use the driving sprocket to connect to the driven sprocket via a chain, forming a closed-loop transmission. Two parallel chains are guided by the sprockets for a circular motion. Scrapers installed at equal intervals on the chains are responsible for moving scum on the water surface and underwater sludge from one end of the sedimentation tank to the other, ultimately collecting these impurities and discharging them out of the system. This design ensures efficient pollutant removal while reducing maintenance costs.

[0003] Although chain scrapers are widely used in sewage treatment, they are susceptible to corrosion and wear due to their long-term submersion in water. Over time, the chain may become loose, causing it to stretch, which in turn can lead to a series of problems such as chain tooth skipping and chain breakage. These problems not only affect the normal operation of the equipment but also increase maintenance costs. Currently, the detection of chain tightness mostly relies on regular manual inspections, which is time-consuming and labor-intensive, and poses certain safety risks, as workers need to enter potentially dangerous working environments to conduct inspections. Utility Model Content

[0004] In response to the problems of low efficiency and high risk in manual detection of chain tightness, the utility model provides a chain tightness detection device for a chain scraper and a chain scraper. The chain tightness detection device automatically senses the tightness of the chain, which not only avoids the errors and lags caused by manual detection, improves detection efficiency, but also eliminates safety hazards for workers.

[0005] The utility model achieves the above technical objectives through the following technical means.

[0006] A chain tightness detection device for a chain scraper, characterized by comprising an L-shaped bracket, a movable sensing rod, a sensor and a lever assembly;

[0007] The L-shaped bracket is vertically installed on the side wall of the sedimentation tank close to the corresponding chain and parallel to the chain. The horizontal section of the L-shaped bracket is arranged perpendicular to the corresponding chain and is used to install the lever assembly; the vertical section of the L-shaped bracket is provided with a vertical cavity for accommodating the up and down movement of the movable sensing rod; the movable sensing rod is slidably installed in the vertical cavity of the L-shaped bracket, and the top of the movable sensing rod is provided with a sensing plate; the sensor is installed at the top of the L-shaped bracket; the lever assembly includes a support and a lever hinged on the support, and a notch connected to the vertical cavity is provided on the vertical section of the L-shaped bracket, and the active end of the lever is located in the lower middle part of the upper chain, and the driven end of the lever passes through the notch and abuts against the bottom of the movable sensing rod; when the chain is in a tensioned state, the horizontal height of the active end of the lever is higher than that of the driven end.

[0008] Furthermore, the minimum lifting height of the movable sensing rod required for the sensing plate to be detected by the sensor is not greater than the height of the notch.

[0009] Furthermore, the height of the vertical cavity is greater than the length of the movable sensing rod, and when the chain is in a tensioned state, the sensing plate is outside the detection range of the sensor.

[0010] Furthermore, the sensor is a proximity switch.

[0011] Furthermore, the chain tightness detection device also includes an alarm connected to the sensor.

[0012] Furthermore, assuming that the weight of the active sensing rod is G1, the weight of the driven end of the lever is G2, the weight of the active end of the lever is G3, and the pressure applied to the active end of the lever when the chain reaches the slack warning state is G4, G1, G2, G3, and G4 satisfy G1+G2≤G3+G4.

[0013] Furthermore, when the chain is in a tensioned state, the distance between the active end of the lever and the upper chain is 1 to 3 cm.

[0014] A chain scraper comprising the chain tightness detection device described in any one of the above items.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. The utility model adopts an automated detection method, which can monitor the tension state of the chain in real time, reducing the frequency and workload of manual inspection and improving work efficiency.

[0017] 2. The chain tightness detection device of the present invention can remotely monitor the chain status, significantly reducing the necessity for personnel to enter dangerous areas and improving operational safety.

[0018] 3. The utility model can timely detect and adjust the tension state of the chain, effectively prevent the chain from being excessively loose, thereby avoiding the occurrence of faults such as chain jumping and chain falling off, avoiding unnecessary downtime and maintenance costs caused by chain looseness, and extending the service life of the chain scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of the chain tightness detection device described in the present invention.

[0020] Figure 2 It is a left view of the chain tightness detection device described in the present invention.

[0021] The reference numerals are as follows:

[0022] 1-L-shaped bracket; 2-movable sensing rod; 3-proximity switch; 4-lever; 5-support; 6-chain; 7-scraper. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0024] The chain tightness detection device for a chain scraper of the utility model comprises an L-shaped bracket 1, a movable sensing rod 2, a proximity switch 3 and a lever assembly.

[0025] The L-shaped bracket 1 is mounted vertically on the sidewall of the sedimentation tank, near and parallel to the corresponding chain 6. The horizontal section of the L-shaped bracket 1 is arranged perpendicular to the chain 6 and is used to mount the lever assembly. The vertical section of the L-shaped bracket 1 contains a vertical cavity for accommodating the upward and downward movement of the movable sensing rod 2. The movable sensing rod 2 slides within the vertical cavity of the L-shaped bracket 1. A sensing plate is installed at the top of the movable sensing rod 2. The height of the vertical cavity is greater than the length of the movable sensing rod 2. When the chain 6 is in a tensioned state, the sensing plate is located outside the sensor's detection range. The proximity switch 3 is mounted at the top of the L-shaped bracket 1 and is connected to the alarm. The lever assembly includes a support 5 and a lever 4 hinged to the support 5. The vertical section of the L-shaped bracket 1 has a notch that connects to the vertical cavity. The active end of the lever 4 is located below and in the middle of the upper chain 6, with a gap of 3 cm between it and the upper chain 6. The driven end of the lever 4 passes through the notch and abuts the bottom of the movable sensing rod 2. And the minimum lifting height of the active sensing rod 2 required for the sensing plate to be detected by the sensor is not greater than the height of the notch. When the chain 6 is in a tensioned state, the horizontal height of the active end of the lever 4 is higher than the driven end.

[0026] In order to ensure that after the slack of the chain 6 exceeds the safety value, the chain 6 segment collapsed on the active end of the lever 4 can use the lever 4 to lift the movable sensing rod 2 to within the detection range of the proximity switch 3, the weight of the movable sensing rod 2 is assumed to be G1, the weight of the driven end of the lever 4 is G2, the weight of the active end of the lever 4 is G3, and the pressure applied to the active end of the lever 4 when the chain 6 reaches the slack warning state is G4. In this embodiment, G1, G2, G3, and G4 are designed to satisfy G1+G2≤G3+G4.

[0027] The working principle of the above-mentioned chain 6 tightness detection device is as follows: when the chain 6 is relaxed, it sags and presses onto the active end of the lever 4. The movable sensing rod 2 is tilted through the principle of the lever 4, so that the sensing plate on the movable sensing rod 2 enters the sensing area of ​​the proximity switch 3 and is captured by it. Then the proximity switch 3 issues an alarm, allowing the staff to respond quickly, avoiding the occurrence of faults such as chain 6 jumping teeth and chain derailment caused by the relaxation of the chain 6, greatly improving the detection efficiency, and ensuring the safe operation of the equipment.

[0028] Furthermore, this embodiment also relates to a chain scraper including the above-mentioned chain tightness detection device, wherein the chain scraper is equipped with two symmetrically arranged chains, and each chain is independently equipped with a set of the chain tightness detection device.

[0029] The embodiments described are preferred implementations of the present invention, but the present invention is not limited to the above-mentioned implementations. Any obvious improvements, replacements or modifications that can be made by those skilled in the art without departing from the essential content of the present invention are within the scope of protection of the present invention.

Claims

1. A chain tightness detection device for a chain scraper, characterized in that: It includes an L-shaped bracket (1), a movable sensing rod (2), a sensor and a lever assembly; The L-shaped bracket (1) is vertically mounted on the side wall of the sedimentation tank close to the corresponding chain (6) and parallel to the chain (6); the horizontal section of the L-shaped bracket (1) is arranged perpendicular to the corresponding chain (6) and is used to install the lever assembly; the vertical section of the L-shaped bracket (1) has a vertical cavity for accommodating the upward and downward movement of the movable sensing rod (2); the movable sensing rod (2) is slidably mounted in the vertical cavity of the L-shaped bracket (1), and the top of the movable sensing rod (2) is provided with a sensing plate; the sensing The device is installed at the top end of the L-shaped bracket (1); the lever assembly includes a support (5) and a lever (4) hinged on the support (5); a notch communicating with the vertical cavity is opened on the vertical section of the L-shaped bracket (1); the active end of the lever (4) is located in the lower middle part of the upper chain (6); the driven end of the lever (4) passes through the notch and abuts against the bottom of the movable sensing rod (2); when the chain (6) is in a tensioned state, the horizontal height of the active end of the lever (4) is higher than that of the driven end.

2. The chain tightness detection device for a chain scraper according to claim 1, characterized in that: The minimum lifting height of the movable sensing rod (2) required for the sensing plate to be detected by the sensor is not greater than the height of the notch.

3. The chain tightness detection device for a chain scraper according to claim 1, characterized in that: The height of the vertical cavity is greater than the length of the movable sensing rod (2), and when the chain (6) is in a tensioned state, the sensing plate is outside the detection range of the sensor.

4. The chain tightness detection device for a chain scraper according to claim 1, characterized in that: The sensor is a proximity switch (3).

5. The chain tightness detection device for a chain scraper according to claim 1, characterized in that: The chain (6) tightness detection device also includes an alarm connected to the sensor.

6. The chain tightness detection device for a chain scraper according to claim 1, characterized in that: Assuming that the weight of the movable sensing rod (2) is G1, the weight of the driven end of the lever (4) is G2, the weight of the active end of the lever (4) is G3, and the pressure applied to the active end of the lever (4) when the chain (6) reaches the slack warning state is G4, the G1, G2, G3, and G4 satisfy G1+G2≤G3+G4.

7. The chain tightness detection device for a chain scraper according to claim 1, characterized in that: When the chain (6) is in a tensioned state, the distance between the active end of the lever (4) and the upper chain (6) is 1 to 3 cm.

8. A chain scraper comprising the chain tightness detection device according to any one of claims 1 to 7.

Images