Screening machine spring displacement prevention device of grating sensor

Abstract

The utility model relates to the field of coal preparation plant production technology, in particular to a grating sensor screening machine spring shifting prevention device which is arranged on an outlet chute of a banana screen discharge port and comprises detection holes formed in the two sides of the outlet chute. And an infrared receiver and an infrared transmitter are respectively arranged on the outer wall of the outlet chute corresponding to the positions of the detection holes, the infrared receiver and the infrared transmitter form a grating sensor, and infrared rays emitted by the infrared transmitter are received by the infrared receiver and form an infrared light curtain. The chute blockage alarm device has the advantages of being timely and accurate in blockage alarm, high in sensitivity and use stability, simple and reasonable in structural design and convenient and fast to use, has good practical significance for transforming a traditional chute, is high in practicability, and effectively improves the reliability of chute blockage detection.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of coal preparation plant production technology especially is related to a grating sensor prevents sieve machine spring displacement device. BACKGROUND

[0002] In the production process of coal preparation plant, banana screen is important equipment for grading, medium and desliming. Large particle size of the inlet material of banana screen is easy to cause the outlet chute to be blocked, and the large block material will squeeze the sieve machine spring to displace after being filled, which brings great safety hazard to the on-site operators. The sieve machine spring is displaced, and the sieve machine cannot operate normally. The sieve machine spring displacement needs to be recovered, which seriously restricts the coal washing production.

[0003] Due to the long-term operation of the sieve machine, the probability of timely discovering the sieve machine outlet chute blockage by simply relying on the staff to patrol and inspect each outlet chute is small. Once the outlet chute is blocked, it will have a great impact on the coal washing production and maintenance, and affect the production efficiency and safety production. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problems existing in the prior art, the utility model provides a grating sensor prevents sieve machine spring displacement device.

[0005] The utility model provides a grating sensor prevents sieve machine spring displacement device adopts the following technical scheme:

[0006] A grating sensor prevents sieve machine spring displacement device is arranged on the outlet chute of the discharge port of the banana screen, which comprises detection holes arranged on both sides of the outlet chute, an infrared receiver and an infrared emitter are respectively arranged on the position corresponding to the detection hole on the outer wall of the outlet chute, the infrared receiver and the infrared emitter form a grating sensor, and the infrared emitted by the infrared emitter is received by the infrared receiver and forms an infrared light curtain.

[0007] Through the above technical scheme, when the material passes through the infrared light curtain, the grating sensor sends a normal signal, which is transmitted to the control system through the cable. At this time, the control system judges that the sieve machine is in normal operation, and there is no accumulated material in the outlet chute. When the receiver of the grating sensor cannot receive the infrared signal for a certain time, the sensor sends a coal full signal to the control system. At this time, the control system judges that the material has filled the outlet chute, and will immediately start the parking program to stop the work of the banana screen. The utility model has the advantages of timely and accurate blocking alarm, high sensitivity and use stability. The utility model has the advantages of simple and reasonable structure, convenient and fast use, good practical significance for the transformation of traditional chute, strong practicality, and effectively improves the reliability of the chute blockage detection.

[0008] Optionally, the infrared receiver and the infrared emitter are fixed on the outer wall of the outlet chute through the L-shaped support and the bolt.

[0009] By adopting the technical scheme, the infrared receiver and the infrared emitter can be fixed on the outlet chute outer wall, and the maintenance is facilitated.

[0010] Optionally, the infrared receiver and the infrared emitter adopt a grating sensor with a 0-10m shooting distance and a 20mm light axis spacing.

[0011] Optionally, a dust removal mechanism for cleaning the infrared receiver and the infrared emitter is arranged on the outlet chute outer wall, and the dust removal mechanism comprises a sliding block slidingly arranged along the length direction of the grating sensor, and a brush for cleaning the surface of the grating sensor is mounted on the sliding block.

[0012] By adopting the technical scheme, the dust on the surface of the grating sensor can be removed by moving the sliding block and the brush, the operation is simple and efficient, and the cleaning effect is remarkable.

[0013] Optionally, two fixed plates are fixedly connected on the two sides of the position corresponding to the detection hole of the outlet chute outer wall, and a fixed rod is connected between the two fixed plates, and the sliding block is slidingly sleeved on the fixed rod.

[0014] By adopting the technical scheme, the fixed rod provides a stable moving path for the sliding block, and the structure of the fixed plate and the fixed rod is convenient for processing and assembling.

[0015] Optionally, a push plate is fixedly connected to the side of the sliding block away from the outlet chute outer wall.

[0016] By adopting the technical scheme, the sliding block can be conveniently moved by the push plate, and the convenience of operation is improved.

[0017] Optionally, a magnet block is embedded and fixed on the outer wall of the sliding block close to the fixed plate.

[0018] By adopting the technical scheme, the sliding block maintains a certain stability through the magnetic attraction effect of the magnet block and the fixed plate after moving to one side.

[0019] Optionally, the brush comprises an L-shaped mounting plate, the top of the mounting plate is fixed on the sliding block through a mounting screw, and a brush hair for contacting the grating sensor is arranged on the inner corner side of the mounting plate.

[0020] By adopting the technical scheme, the L-shaped mounting plate and the brush hair can clean the dust on the side surface and the top surface of the grating sensor, and the cleaning effect is remarkable. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a front view of the grating sensor anti-sieve machine spring displacement device of the utility model embodiment 1.

[0022] Figure 2It is the right view of the grating sensor anti-sieve machine spring displacement device of the embodiment 1 of the utility model.

[0023] Figure 3 It is the schematic view of the infrared receiver and infrared transmitter of the embodiment 1 of the utility model.

[0024] Figure 4 It is the structural schematic view of the L-shaped support of the embodiment 1 of the utility model.

[0025] Figure 5 It is the front view of the dust removal mechanism of the embodiment 2 of the utility model.

[0026] Figure 6 It is Figure 5 The sectional view of A-A direction.

[0027] The sign of figure is explained: 1, banana sieve;2, infrared receiver;3, infrared light curtain;4, infrared transmitter;5, outlet chute;6, detection hole;7, L-shaped support;8, dust removal mechanism;80, fixed plate;81, fixed rod;82, sliding block;83, mounting plate;84, mounting screw;85, brush;86, push plate;87, magnet block. Specific implementation

[0028] The following combines with the Figure 1 - the Figure 6 The utility model is further explained in detail.

[0029] The embodiment of the utility model discloses a grating sensor anti-sieve machine spring displacement device. Embodiment 1

[0030] Refer to Figures 1-4 , the grating sensor anti-sieve machine spring displacement device is used in cooperation with banana sieve 1 and outlet chute 5, and it includes infrared receiver 2, infrared light curtain 3, infrared transmitter 4, detection hole 6 and L-shaped support 7.The lower outlet of banana sieve 1 is connected with the inlet of outlet chute 5, and each detection hole 6 is formed on the left and right sides of the inlet of outlet chute 5, and infrared receiver 2 and infrared transmitter 4 are installed correspondingly beside detection hole 6.

[0031] Refer to Figures 1-4 , infrared receiver 2 and infrared transmitter 4 are fixed firmly with outlet chute 5 through L-shaped support 7 and bolt.Infrared transmitter 4 emits multiple infrared rays to infrared receiver 2, and infrared light curtain 3 is formed between infrared transmitter 4 and infrared receiver 2.Infrared receiver 2 and infrared transmitter 4 adopt grating sensor with 0-10m shooting distance and 20mm optical axis spacing, to ensure that infrared light curtain 3 has no blind area.

[0032] The implementation principle of the embodiment 1 is that when the material passes through the infrared curtain 3, the infrared receiver 2 sends a normal signal and transmits the signal to the control system through the cable, at this time, the control system judges that the screening machine is in normal operation and there is no accumulated material in the outlet chute 5. When the infrared receiver 2 cannot receive the infrared signal for six seconds (the time length can be adjusted), the grating sensor sends a coal full signal to the control system, at this time, the control system judges that the material has been stacked in the outlet chute 5, and a parking program is started immediately to stop the work of the banana screen 1.

[0033] The grating sensor anti-screen machine spring displacement device of the utility model can realize real-time feedback of the outlet chute 5 blockage, avoid the situation that the screening machine spring is squeezed to displacement due to the outlet chute 5 full of coal during the operation of the screening machine, thereby ensuring the safety of the on-site staff, reducing the production accidents and improving the production efficiency of the coal preparation plant. Embodiment 2

[0034] With reference to Figure 5 and Figure 6 , the difference between the embodiment and the embodiment 1 is that in order to effectively clean the dust on the surface of the infrared receiver 2 and the infrared emitter 4, the dust removal mechanism 8 is arranged at the position corresponding to the detection hole 6 outside the outlet chute 5.

[0035] With reference to Figure 5 and Figure 6 , the dust removal mechanism 8 comprises two fixed plates 80 which are vertically fixed to the outer wall of the outlet chute 5, the two fixed plates 80 are located above the two sides of the detection hole 6, a fixed rod 81 is fixed between the two fixed plates 80, the cross section of the fixed rod 81 is rectangular or circular, a sliding block 82 is slidably sleeved on the fixed rod 81, an L-shaped mounting plate 83 is arranged at the bottom of the sliding block 82, and the mounting plate 83 is fixed to the sliding block 82 through mounting screws 84.

[0036] With reference to Figure 5 and Figure 6 , the mounting plate 83 is provided with brush hairs 85 at the inner corner side, the brush hairs 85 are used for cleaning the side surface and the top surface of the grating sensor, the mounting plate 83 and the brush hairs 85 constitute a brush, a push plate 86 is vertically fixed to the side of the sliding block 82 away from the outlet chute 5, and a staff member can push the sliding block 82 to move left and right through the push plate 86. A magnet block 87 is embedded and fixed on the side wall of the sliding block 82 close to the fixed plate 80, and the sliding block 82 can be temporarily fixed beside the fixed plate 80 through the magnetic attraction of the magnet block 87 and the fixed plate 80, so as to avoid the displacement of the sliding block 82 caused by the vibration of the screening frame.

[0037] The principle of the embodiment of the example 2 is that when the grating sensor is used for a period of time or the surface is covered with dust, the staff can push the push plate 86 to one side, the sliding block 82 moves on the fixed rod 81, and the mounting plate 83 is driven to move, the brush 85 moves to clean the dust on the surface of the infrared receiver 2 and the infrared transmitter 4, and the sliding block 82 moves to the side of the fixed plate 80 and is fixed on the fixed plate 80 through the magnet block 87. By using the dust removal mechanism 8, the dust on the surface of the sensor can be cleaned in time, and the normal formation of the infrared light curtain 3 is avoided.

[0038] The above are preferred embodiments of the utility model, and not by this limit the protection scope of the utility model, therefore: all equivalent changes made according to the structure, shape, principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A spring displacement device for a grating sensor anti-screening machine, characterized in that: The outlet chute (5) of the banana screen (1) is provided with detection holes (6) on both sides of the outlet chute (5). Infrared receivers (2) and infrared emitters (4) are installed on the outer wall of the outlet chute (5) at positions corresponding to the detection holes (6). The infrared receivers (2) and infrared emitters (4) form a grating sensor. The infrared rays emitted by the infrared emitters (4) are received by the infrared receivers (2) and form an infrared light curtain (3). A dust removal mechanism for cleaning the infrared receivers (2) and infrared emitters (4) is provided on the outer wall of the outlet chute (5). 8) The dust removal mechanism (8) includes a slider (82) that slides along the length of the grating sensor. A brush for cleaning the surface of the grating sensor is installed on the slider (82). Fixing plates (80) are fixed on both sides of the outer wall of the outlet chute (5) corresponding to the position of the detection hole (6). A fixing rod (81) is connected between the two fixing plates (80). The slider (82) is slidably sleeved on the fixing rod (81). A lever plate (86) is fixed on the side of the slider (82) away from the outer wall of the outlet chute (5). A magnet block (87) is embedded and fixed on the outer wall of the slider (82) near the fixing plate (80).

2. The grating sensor anti-screening machine spring shifting device according to claim 1, characterized in that: Both the infrared receiver (2) and the infrared transmitter (4) are fixed to the outer wall of the outlet chute (5) by L-shaped brackets (7) and bolts.

3. The grating sensor anti-screening machine spring shifting device according to claim 1, characterized in that: The infrared receiver (2) and infrared transmitter (4) adopt grating sensors with a beam distance of 0-10m and an optical axis spacing of 20mm.

4. The grating sensor anti-screening machine spring shifting device according to claim 1, characterized in that: The brush includes an L-shaped mounting plate (83), the top of which is fixed to the slider (82) by mounting screws (84), and the mounting plate (83) has bristles (85) on the inside corner side for contacting the grating sensor.

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