Blockage alarm device for dense medium cyclone

Abstract

The utility model discloses a heavy medium cyclone clogging alarm device, including detection box, lever device, limit table, spring, proximity switch and material pipe, the detection box is fixed in the one side of material pipe, lever device's rotation center is in the junction of detection box and material pipe, one end of lever device extends into the inner cavity of detection box, and the other end of lever device extends into the inner cavity of detection box. The upper end of the limiting table is in limiting contact with the lower side of the end, extending into the inner cavity of the detection box, of the lever device, the upper end of the spring is connected to the lower side of the end, extending into the inner cavity of the detection box, of the lever device in a traction mode, and the proximity switch corresponds to the lower side of the end, extending into the inner cavity of the detection box, of the lever device; the device is simple in structure and wide in applicability, and can give an alarm in time when the connecting pipe is just blocked, so that blocked sundries can be cleaned in time, major accidents caused by blocking of the connecting pipe of the dense medium cyclone are prevented, the safety in the coal dressing process is improved, the production cost is reduced, and meanwhile, the quality of selected clean coal is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of coal preparation equipment, and more specifically relates to a heavy medium cyclone blockage alarm device. Background Art

[0002] Coal preparation plants often use heavy medium cyclones to separate clean coal from debris when washing raw coal. However, if the cross-sectional area of ​​large debris in the raw coal is larger than the cross-sectional area of ​​the connecting pipe between the first and second cyclones of the heavy medium cyclone, the connecting pipe will be blocked. If the blocked debris cannot be handled in time, the quality of the clean coal will be affected, and the suspension will also overflow, polluting the environment and increasing production costs. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a heavy medium cyclone blockage alarm device with a simple structure and wide applicability. It can promptly issue an alarm when the heavy medium cyclone connecting pipe is just blocked, so that the blocking debris can be cleaned in time, thereby preventing major accidents caused by blockage of the heavy medium cyclone connecting pipe, greatly improving the safety of the coal preparation process, indirectly reducing production costs, and ensuring the quality of the selected clean coal.

[0004] Technical solution: To achieve the above-mentioned purpose, the utility model provides a heavy medium cyclone blockage alarm device, which includes a detection box, a lever device, a limit platform, a spring, a proximity switch and a material pipe. The detection box is fixed on one side of the material pipe, the rotation center of the lever device is at the connection between the detection box and the material pipe, one end of the lever device extends into the inner cavity of the detection box, and the other end extends into the interior of the material pipe. The upper end of the limit platform limits the contact with the lower side of the end of the lever device extending into the inner cavity of the detection box, the upper end of the spring is pulled and connected to the lower side of the end of the lever device extending into the inner cavity of the detection box, and the proximity switch corresponds to the lower side of the end of the lever device extending into the inner cavity of the detection box.

[0005] Furthermore, the lever device includes a ball core, a rear rod, a sensor identification plate, a front rod and a probe rod; the rear rod and the sensor identification plate are located in the inner cavity of the detection box, and the front rod and the probe rod are located inside the material pipe; the lower side of the rear rod is in limiting contact with the upper end of the limit platform; the rear end of the rear rod is fixedly connected to the sensor identification plate, and the lower side of the sensor identification plate is in contact with the proximity switch induction setting; the rear end of the sensor identification plate is fixedly connected to the upper end of the spring, and the lower end of the spring is fixedly connected to the inner wall at the lower middle part of the inner cavity of the detection box; the front rod is connected to the probe rod.

[0006] Furthermore, a core protection cover is fixed on one side of the detection box close to the material pipe, and the core is embedded in the core protection cover; a core swing hole A is opened at one end of the core protection cover close to the material pipe, and a core swing hole B is opened at one end of the core protection cover located in the inner cavity of the detection box, the front end of the rear rod passes through the core swing hole B on the core protection cover and is fixed to the core, and the rear end of the front rod passes through the core swing hole A on the core protection cover and is fixedly connected to the core.

[0007] Furthermore, an extension sleeve is provided on the outer sleeve of the probe rod.

[0008] Furthermore, the limit platform includes a mounting arm, a limit rod and a mounting slot; one end of the mounting arm is fixedly mounted on the limit rod, the lower end of the limit rod is fixedly connected to the inner wall of the lower middle portion of the inner cavity of the detection box, and is located between the spring and the side of the detection box close to the material pipe, and the other end of the mounting arm is provided with a mounting slot, and the proximity switch is fixedly installed in the mounting slot.

[0009] Furthermore, an A elastic ring is fixed at the opening of the swing hole of the A ball core, and a B elastic ring is fixed at the opening of the swing hole of the B ball core.

[0010] Beneficial effect: The utility model provides a heavy medium cyclone blockage alarm device with a simple structure. The distance between the front end of the extension sleeve and the rear end of the probe rod can be adjusted according to the size of the material pipe cross section. It has wide applicability. The impact force formed by the material in the material pipe on the end of the lever device extending into the material pipe is used to offset the pulling force of the spring on the end of the lever device extending into the inner cavity of the detection box close to the proximity switch. When the amount of material falling in the material pipe changes slightly, that is, when the connecting pipe is just blocked or only partially blocked, an alarm can be issued in time, so that the blocking debris can be cleaned in time, thereby preventing major accidents caused by the blockage of the heavy medium cyclone connecting pipe, greatly improving the safety of the coal preparation process, indirectly reducing production costs, and ensuring the quality of the selected clean coal. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural cross-sectional view of a heavy medium cyclone blockage alarm device according to the present invention;

[0012] Figure 2 This is an enlarged view of the structure of the core and the core protection cover;

[0013] Figure 3 This is an enlarged view of the limit table and proximity switch mechanism. DETAILED DESCRIPTION

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] As attached Figures 1 to 3As shown, a heavy medium cyclone blockage alarm device includes a detection box 4, a lever device, a limit platform 23, a spring 11, a proximity switch 26 and a material pipe 1. The detection box 4 is fixed to one side of the material pipe 1, and the rotation center of the lever device is at the connection between the detection box 4 and the material pipe 1. One end of the lever device extends into the inner cavity of the detection box 4, and the other end extends into the interior of the material pipe 1. The upper end of the limit platform 23 limits the contact with the lower side of the end of the lever device extending into the inner cavity of the detection box 4. The upper end of the spring 11 is pulled and connected to the lower side of the end of the lever device extending into the inner cavity of the detection box 4. The proximity switch 26 corresponds to the lower side of the end of the lever device extending into the inner cavity of the detection box 4. The proximity switch 26 is connected to the alarm device. When the upper end of the spring 11 pulls the lever device to extend into the lower side of the end of the inner cavity of the detection box 4 and contacts the upper end of the limit platform 23, the proximity switch 26 is turned on and controls the alarm device to sound an alarm.

[0016] like Figure 1 As shown, a core protection cover 7 is fixed on the side of the detection box 4 close to the material pipe 1, and a core A swing hole 18 is opened at one end of the core protection cover 7 close to the material pipe 1, and a core B swing hole 29 is opened at one end of the core protection cover 7 located in the inner cavity of the detection box 4. The core A swing hole 18 and the core B swing hole 29 are symmetrically arranged, and an elastic ring A 12 is fixed at the opening of the core A swing hole 18, and an elastic ring B 31 is fixed at the opening of the core B swing hole 29. The elastic ring A 12 can buffer the impact force of the end of the lever device extending into the interior of the material pipe 1 on the core A swing hole 18 when it swings, and the elastic ring B 31 can buffer the impact force of the end of the lever device extending into the inner cavity of the detection box 4 on the core B swing hole 29 when it swings.

[0017] like Figure 1As shown, the lever device includes a ball core 8, a rear rod 9, a sensor identification plate 10, a front rod 13, a probe rod 14 and an extension sleeve 15; the ball core 8 is embedded in the ball core protection cover 7 and can rotate relative to the ball core protection cover 7, the rear rod 9 and the sensor identification plate 10 are located in the inner cavity of the detection box 4, and the front rod 13, the probe rod 14 and the extension sleeve 15 are located inside the material pipe 1; the front end of the rear rod 9 passes through the ball core swing hole 29 on the ball core protection cover 7 and is fixed to the ball core 8, and the lower side of the rear rod 9 is in contact with the upper end of the limit platform 23. The rear end of the rear rod 9 is fixedly connected to the front end of the sensor identification plate 10. The lower side of the sensor identification plate 10 is inductively connected to the proximity switch 26. The rear end of the sensor identification plate 10 is fixedly connected to the upper end of the spring 11. The lower end of the spring 11 is fixedly connected to the inner wall of the lower middle part of the inner cavity of the detection box 4. The rear end of the front rod 13 passes through the A ball core swing hole 18 on the ball core protection cover 7 and is fixedly connected to the ball core 8. The front end of the front rod 13 is fixedly connected to the rear end of the probe rod 14. The inner wall of the extension sleeve 15 and the outer wall of the probe rod 14 can be relatively close. Sliding, a plurality of threaded holes 28 are opened on one side of the extension sleeve 15, and a plurality of threaded fasteners pass through each of the threaded holes 28 to fix the extension sleeve 15 on the probe rod 14; according to the cross-sectional size of the internal material pipe 1 of different models of heavy medium cyclone, the inner wall of the extension sleeve 15 and the outer wall of the probe rod 14 are made to slide relative to each other until the distance between the front end of the extension sleeve 15 and the rear end of the probe rod 14 reaches more than two-thirds of the cross-sectional length of the internal material pipe 1, and then a plurality of threaded fasteners are tightened in each of the threaded holes 28, the extension sleeve 15 is fixed on the probe rod 14. If the distance between the front end of the extension sleeve 15 and the rear end of the probe rod 14 does not reach more than two-thirds of the cross-sectional length inside the material pipe 1, then when the material in the material pipe 1 contacts the extension sleeve 15 and the probe rod 14 during the falling process, the downward pressure acting on the extension sleeve 15 and the probe rod 14 is insufficient to enable the rear rod 9 and the sensor identification plate 10 to overcome the downward pulling force of the upper end of the spring 11 on the rear end of the sensor identification plate 10, thereby preventing the rear rod 9 and the sensor identification plate 10 from deflecting relative to the core 8.

[0018] like Figure 3 As shown, the limit platform 23 includes a mounting arm 22, a limit rod 30 and a mounting slot 25; one end of the mounting arm 22 is fixedly mounted on the limit rod 30, and the upper end of the limit rod 30 is fixedly provided with an elastic rubber pad 24. When the lower side of the rear rod 9 in the lever device is in contact with the upper end of the limit rod 30, the elastic rubber pad 24 can buffer the impact force generated by the rear rod 9 on the limit rod 30. The lower end of the limit rod 30 is fixedly connected to the inner wall of the lower middle part of the inner cavity of the detection box 4, and is closer to the material pipe 1 than the spring 11. The other end of the mounting arm 22 is provided with a mounting slot 25, and a proximity switch 26 is fixedly installed in the mounting slot 25. The lower end of the proximity switch 26 is connected to a control circuit 27. The proximity switch 26 controls the start or shut down of the alarm device through the control circuit 27.

[0019] like Figure 1 As shown, the material pipe 1 is a vertical rectangular tube. A ball core mounting hole 3 is provided on one side of the material pipe 1 to which the detection box 4 is fixedly connected. The part of the ball core protection cover 7 protruding from the detection box 4 is installed in the ball core mounting hole 3. A plurality of material guide platforms 2 are provided on the inner wall of the material pipe 1. In the process of material falling, the material guide platform 2 can guide the material close to the inner wall of the material pipe 1 so that it falls onto the probe rod 14 and the extension sleeve 15 as much as possible. At the same time, it can also prevent large pieces of material from falling directly onto the connection between the probe rod 14 and the front rod 13, thereby preventing the connection between the probe rod 14 and the front rod 13 from breaking. The material flowing downstream in the material pipe 1 is a mixture of impurities and suspension in the raw coal.

[0020] like Figure 2 As shown, an oil passage 21 is opened on the upper part of the core protective cover 7, and the oil passage 21 runs from the outer surface of the upper part of the core protective cover 7 through the core protective cover 7 to the inner surface of the core protective cover 7. Lubricating oil is added to the oil passage 21 regularly, and the lubricating oil can flow along the oil passage 21 into the gap directly formed between the outer surface of the core 8 and the inner surface of the core protective shell 7, thereby ensuring the smoothness of the rotation of the core 8 relative to the core protective cover 7; an inclined refueling pipe 19 is fixed at the entrance of the oil passage 21 located on the outer surface of the core protective cover 7, and the inclined refueling pipe 19 can speed up the flow of lubricating oil into the oil passage 21; the upper end of the refueling pipe 19 is threadedly connected to a sealing cover 20 to prevent foreign matter from entering the oil passage 21 and causing the oil passage 21 to be blocked.

[0021] like Figure 1 As shown, an inspection slot 5 is provided on one side of the inspection box 4, and a cover plate 6 is movably embedded in the inspection slot 5. When the lever device needs to be inspected or lubricating oil needs to be added to the oil channel 21, the cover plate 6 can be opened for inspection or addition; a circuit hole 17 is provided on the inner wall at the lower middle part of the inner cavity of the inspection box 4, and a control circuit 27 connected to the lower end of the proximity switch 26 passes through the circuit hole 17 on the inspection box 4 and is connected to the external alarm device; a mounting base 16 is fixedly provided around one side of the inspection box 4 close to the material pipe 1, and the inspection box 4 is mounted on the material pipe 1 through the mounting base 16.

[0022] The utility model is a heavy medium cyclone blockage alarm device, the working principle of which is:

[0023] When the material pipe 1 is not blocked by debris in the raw coal, the impact force generated by the material continuously flowing down from the material pipe 1 on the probe rod 14 and the extension sleeve 15 will form a downward pressure on the probe rod 14 and the extension sleeve 15. This downward pressure can overcome the pulling force generated by the spring 11 on the sensor identification plate 10, and drive the two ends of the lever device to rotate counterclockwise around the rotation center of the lever device. The lower side of the sensor identification plate 10 rotates out of the recognition range of the proximity switch 26, and finally the ball core 8, rear rod 9, sensor identification plate 10, front rod 13, probe rod 14 and extension sleeve 15 are on an inclined straight line, and the rear rod 9 and sensor identification plate 10 are located above the rotation center, while the front rod 13, probe rod 14 and extension sleeve 15 are located below the rotation center.

[0024] When the material pipe 1 is blocked, the impact force generated by the material continuously flowing down from the material pipe 1 on the probe rod 14 and the extension sleeve 15 will form a downward pressure on the probe rod 14 and the extension sleeve 15. This downward pressure cannot overcome the pulling force generated by the spring 11 on the sensor identification plate 10. Therefore, under the action of the pulling force generated by the spring 11 on the sensor identification plate 10, the two ends of the lever device rotate clockwise around the rotation center of the lever device until the lower side of the rear rod 9 contacts the upper end of the limit rod 30. At this time, the lower side of the sensor identification plate 10 is within the sensing range of the proximity switch 26, and the proximity switch 26 is in the open state, and the alarm device is controlled to sound an alarm, so that the staff can deal with the blockage in time.

[0025] If the material pipe 1 is blocked, it is very likely that there is a problem in the previous process, such as an abnormality in the crushing equipment. After the staff promptly handles the blockage, they should check the equipment used in the previous process to prevent the material pipe 1 from being blocked again.

[0026] The above is the preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A dense medium cyclone blockage alarm device, characterized by: The invention comprises a detection box (4), a lever device, a limit table (23), a spring (11), a proximity switch (26) and a material pipe (1), wherein the detection box (4) is fixed on one side of the material pipe (1), the rotation center of the lever device is at the connection between the detection box (4) and the material pipe (1), one end of the lever device extends into the inner cavity of the detection box (4), and the other end extends into the interior of the material pipe (1), the upper end of the limit table (23) contacts the lower side of one end of the lever device extending into the inner cavity of the detection box (4), the upper end of the spring (11) is pulled and connected to the lower side of one end of the lever device extending into the inner cavity of the detection box (4), and the proximity switch (26) corresponds to the lower side of one end of the lever device extending into the inner cavity of the detection box (4).

2. The heavy medium cyclone blockage alarm device according to claim 1, characterized in that: The lever device comprises a ball core (8), a rear rod (9), a sensor identification plate (10), a front rod (13) and a probe rod (14); the rear rod (9) and the sensor identification plate (10) are located in the inner cavity of the detection box (4), and the front rod (13) and the probe rod (14) are located inside the material pipe (1); the lower side of the rear rod (9) is in contact with the upper end of the limit platform (23); the rear end of the rear rod (9) is fixedly connected to the sensor identification plate (10), and the lower side of the sensor identification plate (10) is inductively arranged with a proximity switch (26); the rear end of the sensor identification plate (10) is fixedly connected to the upper end of the spring (11), and the lower end of the spring (11) is fixedly connected to the inner wall of the lower middle portion of the inner cavity of the detection box (4); the front rod (13) is connected to the probe rod (14).

3. The heavy medium cyclone blockage alarm device according to claim 2, characterized in that: A core protection cover (7) is fixed on one side of the detection box (4) close to the material pipe (1), and the core (8) is embedded in the core protection cover (7); an A core swing hole (18) is opened on one end of the core protection cover (7) close to the material pipe (1), and a B core swing hole (29) is opened on one end of the core protection cover (7) located in the inner cavity of the detection box (4); the front end of the rear rod (9) passes through the B core swing hole (29) on the core protection cover (7) and is fixed to the core (8); the rear end of the front rod (13) passes through the A core swing hole (18) on the core protection cover (7) and is fixed to the core (8).

4. The heavy medium cyclone blockage alarm device according to claim 2, characterized in that: The outer sleeve of the probe rod (14) is provided with an extension sleeve (15).

5. The heavy medium cyclone blockage alarm device according to claim 1, characterized in that: The limiting platform (23) comprises a mounting arm (22), a limiting rod (30) and a mounting groove (25); one end of the mounting arm (22) is fixedly sleeved on the limiting rod (30), the lower end of the limiting rod (30) is fixedly connected to the inner wall of the lower middle portion of the inner cavity of the detection box (4), and is located between the spring (11) and the side of the detection box (4) close to the material pipe (1); the other end of the mounting arm (22) is provided with a mounting groove (25), and the proximity switch (26) is fixedly mounted in the mounting groove (25).

6. The heavy medium cyclone blockage alarm device according to claim 3, characterized in that: An A elastic ring (12) is fixed at the opening of the A ball core swing hole (18), and a B elastic ring (31) is fixed at the opening of the B ball core swing hole (29).

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