Hopper stroke detection device of end sampling machine
The novel design converts the bucket's movement into vertical displacement to trigger a sensing switch optimally, addressing the malfunction and collision issues, enhancing the reliability and reducing failures in the end-of-belt sampler.
Patent Information
- Application Number
- CN202422264875.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-14
AI Technical Summary
The induction stroke switch of existing end samplers is prone to failure, resulting in frequent sampler failures, especially the problem of hopper dump and wire rope breakage.
A hopper stroke detection device is designed to convert the running stroke of the hopper into the drop height of the cylindrical iron block, and the movement trajectory of the cylindrical iron block is bound through the conduit, so that it is within the optimal sensitivity range of the induction stroke switch, so as to avoid the induction stroke switch being affected by the movement and jitter of the hopper.
Effectively avoid the induction stroke switch failure and damage, improve the reliability of the device, reduce the failure rate of the sampler, and reduce the hopper dump and wire rope breakage.
Smart Images
Figure CN223106924U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of mechanized sampling equipment for coal conveying belts, and particularly relates to a hopper stroke detection device for an end sampling machine. Background Art
[0002] The coal conveying belt of a 2×600MW thermal power plant uses an SDBS-T1600 bucket elevator belt end sampling machine. During on-site use, the sampling machine has a high failure rate. The main reasons are that the hopper of the sampling machine often overturns and the steel wire rope breaks, which has been plaguing the operation and maintenance personnel of this power plant.
[0003] The sampling machine mainly consists of structures such as a winch, a steel wire rope, a hopper, and a guide rail. When starting sampling, the winch rotates forward, and the hopper falls to the sampling position by its own gravity to collect samples; after sampling is completed, the winch changes from forward rotation to reverse rotation, and the hopper is pulled up to the sample discharge position by the steel wire rope to discharge samples.
[0004] Analyzing the reasons for the frequent failures of the sampling machine, the frequent failures of the sampling machine are mainly manifested as the overturning of the sampling hopper and the breaking of the steel wire rope. The root cause of the overturning of the sampling hopper and the breaking of the steel wire rope is the failure of the inductive travel switch.
[0005] Digging deeper into the reasons for the failure of the inductive travel switch, the inductive travel switch is installed on the guide rail of the hopper. During the operation of the equipment, the guide rail will swing back and forth, the hopper moves up and down in the guide rail, and the entire guide rail is in a jitter state. At the same time, the hopper position will move slightly left and right. Since the induction distance of the inductive travel switch is within 20mm, and the best induction interval is only 5 - 8mm, when the hopper is far from the inductive travel switch, the inductive travel switch will fail, and when the hopper is close, the inductive travel switch is often damaged.
[0006] To cure this problem, after repeated exploration and tests, the inventor has developed a hopper stroke detection device for an end sampling machine. Content of the Utility Model
[0007] In order to make up for the above deficiencies, the utility model provides a hopper stroke detection device for an end sampling machine, aiming to improve the problem that the inductive travel switch of the existing end sampling machine is prone to failure.
[0008] To achieve the above object, the present utility model provides the following technical solutions: A hopper stroke detection device for an end sampling machine, including an inductive travel switch, a guide rail, a hopper, a steel wire rope, and a winch. The hopper is installed on the guide rail. One end of the steel wire rope is fixed in the wire reel of the winch, and the other end is fixed on the hopper. When the winch rotates forward, the hopper falls to the sampling port by its own gravity for sampling. After sampling is completed, the winch rotates in reverse, and the hopper is pulled up to the discharging position by the steel wire rope for discharging. A rotating shaft is provided in the middle of the wire reel of the winch, and a wire reel is installed at the end of the rotating shaft. A conduit is installed at the lower position directly in front of the wire reel. One end of the towing rope is fixed on the wire reel and wound into the wire reel, and the other end is tied to a cylindrical iron block. The winding direction is opposite to that of the steel wire rope. The cylindrical iron block is placed in the conduit, and the inductive travel switch is installed against the lower outer wall of the conduit. The travel of the hopper is ingeniously converted into the falling height of the cylindrical iron block, effectively avoiding the phenomena of the inductive switch malfunctioning and being damaged, and greatly improving the reliability.
[0009] As a further description of the above technical solution: The gap between the inductive travel switch and the lower outer wall of the conduit is 3 mm.
[0010] As a further description of the above technical solution: The diameter of the cylindrical iron block is 25 mm, and the outer diameter of the conduit is 32 mm with a thickness of 2 mm. This just ensures that the distance between the inductive travel switch and the cylindrical iron block is between 5 - 8 mm, which is the optimal sensitive area for induction.
[0011] As a further description of the above technical solution: The inductive sensitivity of the inductive travel switch is 20 mm, and the optimal induction interval is 5 - 8 mm.
[0012] As a further description of the above technical solution: The towing rope uses a stainless steel wire rope with a diameter of 1 mm.
[0013] As a further description of the above technical solution: The conduit uses a polyvinyl chloride (PVC) pipe with an outer diameter of 32 mm and a thickness of 2 mm.
[0014] As a further description of the above technical solution: The diameter of the wire reel is 300 mm and is the same as the diameter of the wire reel of the steel wire rope.
[0015] As a further description of the above technical solution: A fixed pulley is connected to the outer wall of the towing rope, and the fixed pulley is installed at the position between the front of the wire reel and above the conduit.
[0016] The present utility model has the following beneficial effects:
[0017] In the present utility model, the running stroke of the hopper is converted into the falling height of the cylindrical iron block, effectively avoiding the phenomenon of the induction travel switch malfunctioning or being damaged, greatly improving the reliability; the induction travel switch is not affected by the movement and jitter of the sampling hopper guide rail, completely eliminating the phenomenon of the induction travel switch being hit, and reducing the failure rate of the sampling machine. Description of the Drawings
[0018] Figure 1 is a schematic diagram of the sample discharging position of a hopper stroke detection device of an end sampling machine of the present utility model;
[0019] Figure 2 is a schematic diagram of the sampling position of a hopper stroke detection device of an end sampling machine of the present utility model.
[0020] Legend Explanation:
[0021] 1. Induction travel switch; 2. Cylindrical iron block; 3. Traction rope; 4. Conduit; 5. Fixed pulley; 6. Reel; 7. Guide rail; 8. Hopper; 9. Steel wire rope; 10. Winch. Detailed Embodiment
[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0023] Refer to Figure 1 - Figure 2 , an embodiment provided by the present utility model: The hopper stroke detection device of the end sampling machine in this embodiment includes an induction travel switch 1, a guide rail 7, a hopper 8, a steel wire rope 9, and a winch 10. The hopper 8 is installed on the guide rail 7. One end of the steel wire rope 9 is fixed in the reel of the winch 10, and the other end of the steel wire rope 9 is fixed on the hopper 8. When the winch 10 rotates forward, the hopper 8 falls to the sampling port by its own gravity for sampling. After sampling is completed, the winch 10 rotates in reverse, and the hopper 8 is pulled up to the sample discharging position for discharging through the steel wire rope 9. A rotating shaft is provided in the middle of the reel of the winch 10, and a reel 6 is installed at the end of the rotating shaft. A conduit 4 is installed at the lower position in the front of the reel 6. One end of the traction rope 3 is fixed on the reel 6, wound into the reel 6, and the other end is tied to the cylindrical iron block 2. The winding direction is opposite to that of the steel wire rope 9. The cylindrical iron block 2 is placed in the conduit 4, and the induction travel switch 1 is installed against the lower outer wall of the conduit 4. When the winch 10 rotates forward and backward, at the same time, the traction rope 3 moves the cylindrical iron block 2 up and down, realizing the cylindrical iron block 2 triggering the induction travel switch 1.
[0024] Figure 1 In Figure 2The middle hopper 8 is located at the sampling position. When the hopper 8 runs between the unloading position and the sampling position, the running stroke of the hopper 8 is L, and the falling height of the cylindrical iron block 2 is H. The running stroke L of the hopper 8 is converted into the falling height H of the cylindrical iron block 2, that is, H=L. The guide tube 4 is used to constrain the movement trajectory of the cylindrical iron block 2 to ensure that the cylindrical iron block 2 is within the optimal sensitivity range of the inductive stroke switch 1 to avoid failure of the inductive stroke switch 1; the inductive stroke switch 1 is not affected by the movement and shaking of the hopper 8, and the collision phenomenon of the inductive stroke switch 1 is completely eliminated. It has high reliability, improves the problem that the inductive stroke switch of the existing end sampler is easy to fail, reduces the failure rate of the sampler, and reduces the phenomenon that the sampler hopper 8 often overturns and the wire rope 9 is pulled off.
[0025] In one embodiment, the gap between the inductive travel switch 1 and the lower outer wall of the conduit 4 is 3mm. The diameter of the cylindrical iron block 2 is 25mm, the outer diameter of the conduit 4 is 32mm, and the thickness is 2mm, which can just ensure that the distance between the inductive travel switch 1 and the cylindrical iron block 2 is between 5-8mm, that is, the best sensitive area of induction. The inductive travel switch 1 has a sensitivity of 20mm and an optimal inductive interval of 5-8mm. The traction rope 3 uses a stainless steel wire rope with a diameter of 1mm. The conduit 4 uses a polyvinyl chloride PVC pipe with a diameter of 32mm and a thickness of 2mm. The diameter of the winding drum 6 is 300mm, which is the same as the diameter of the winding drum of the wire rope 9. The outer wall of the traction rope 3 is connected to a fixed pulley 5, which is installed between the front of the winding drum 6 and the top of the conduit 4.
[0026] Working principle: Before sampling, the hopper 8 is at the upper end of the guide rail 7, and the discharge port is located at Figure 1 After receiving the sampling instruction, the winch 10 rotates forward, and the hopper 8 falls to the sampling position by its own gravity to collect materials. The falling distance during the process is L, as shown in Figure 2 At the same time, the traction rope 3 pulls the cylindrical iron block 2, and the rising distance is H. After the sampling is completed, the winch 10 reverses and pulls the hopper 8 to the unloading position through the wire rope 9, and the rising stroke is L; at the same time, the cylindrical iron block 2 falls by gravity, and the up and down distance is H, and returns to Figure 1 Since the diameter of the winding drum 6 of the traction rope 3 is the same as that of the winding drum of the wire rope 9, H=L, the inductive stroke switch 1 is actuated, and the hoist 10 is stopped. The above completes a sampling cycle, and until the next cycle, the above actions are repeated, and the running stroke L of the hopper 8 is cleverly converted into the falling height H of the cylindrical iron block 2, which effectively avoids the failure and damage of the inductive stroke switch, and greatly improves reliability.
[0027] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A hopper stroke detection device for an end sampling machine, comprising an inductive travel switch (1), a guide rail (7), a hopper (8), a steel wire rope (9) and a winch (10). The hopper (8) is installed on the guide rail (7). One end of the steel wire rope (9) is fixed in the wire reel of the winch (10), and the other end of the steel wire rope (9) is fixed on the hopper (8), characterized in that: A rotating shaft is provided in the middle of the wire reel of the winch (10). A wire reel (6) is installed at the end of the rotating shaft. A conduit (4) is installed at the lower position in the front of the wire reel (6). One end of the towing rope (3) is fixed in the wire reel (6), and the other end is tied to a cylindrical iron block (2). The winding direction is opposite to that of the steel wire rope (9). The cylindrical iron block (2) is placed in the conduit (4). The inductive travel switch (1) is installed against the lower outer wall of the conduit (4).
2. The hopper stroke detection device of an end sampling machine according to claim 1, characterized in that: The gap between the inductive travel switch (1) and the lower outer wall of the conduit (4) is 3 mm.
3. The hopper stroke detection device for the end sampling machine according to claim 1, characterized in that: The diameter of the cylindrical iron block (2) is 25 mm. The outer diameter of the conduit (4) is 32 mm and the thickness is 2 mm.
4. The hopper stroke detection device of an end sampling machine according to claim 1, characterized in that: The inductive sensitivity of the inductive travel switch (1) is 20 mm.
5. The hopper stroke detection device of an end sampling machine according to claim 1, characterized in that: The towing rope (3) is made of a 1-mm-diameter stainless steel wire rope.
6. The hopper stroke detection device of an end sampling machine according to claim 1, characterized in that: The conduit (4) is made of a 32-mm-diameter polyvinyl chloride (PVC) pipe with a thickness of 2 mm.
7. The hopper stroke detection device of an end sampling machine according to claim 1, characterized in that: The diameter of the wire reel (6) is 300 mm, which is the same as the wire reel diameter of the steel wire rope (9).
8. The hopper stroke detection device for the end sampling machine according to claim 1, characterized in that: A fixed pulley (5) is connected to the outer wall of the towing rope (3). The fixed pulley (5) is installed at the position between the front of the wire reel (6) and above the conduit (4).