Rake type thickener capable of preventing rake from falling off

Abstract

The rake type thickener comprises a base and a rotating main shaft, the lower side of the rotating main shaft is fixedly connected with the upper side of the base, a center shaft is arranged above the base, a first round hole is formed in the center position of the center shaft, and the rotating main shaft penetrates through the first round hole and is fixedly connected with the center shaft. A sensing cover is fixedly connected to the side wall of the center shaft, a differential pressure sensor is fixedly connected into the sensing cover, the input end of the differential pressure sensor is connected with a differential pressure rod through a coupler, a first penetrating hole is formed in the bottom of the sensing cover, and one end of the differential pressure rod penetrates through the first penetrating hole of the sensing cover to be fixedly connected with an upper extrusion plate. A cavity is formed in the base and located below the sensing cover, and an upper extrusion plate is located on the upper side of the interior of the cavity. The rake-type thickener capable of preventing the rake from falling off disclosed by the utility model has the effects that the thickener can stop running in time after a fault occurs in the running process of the thickener, and the falling off of the rake frame is relieved through some devices.

Description

Technical Field

[0001] The utility model relates to the technical field of concentration equipment, in particular to an anti-rake-off rake-type concentrator. Background Art

[0002] Rake thickener is a pulp thickening equipment that uses a rake frame installed at the bottom of a circular trough to continuously discharge the precipitated product based on the principle of gravity sedimentation. Rake thickeners can be divided into three categories according to their structural characteristics: single-layer thickeners, multi-layer thickeners and high-efficiency thickeners; and can be divided into two categories according to their transmission mode: central transmission type and peripheral transmission type.

[0003] When the rake thickener is in use, the motor drives the rake frame to rotate. During the rotation, the rake frame may fall off. Since the rake frame is located below the surface of the thickening tank, it cannot be discovered in time after falling off, causing damage to the machine and unable to be repaired in time, thus reducing the service life of the machine. Utility Model Content

[0004] The utility model discloses an anti-rake-off rake-type thickener, which aims to solve the technical problem that the rake frame of the rake thickener falls off when in use. Since the rake frame is located below the surface of the thickening tank, it cannot be discovered in time after falling off, resulting in damage to the machine and inability to repair it in time.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The top of the driving mechanism is mounted on a link cam of the hydraulic cylinder, and the bottom of the driving mechanism is mounted on a link cam of the hydraulic cylinder, and the hydraulic cylinder is connected along the hydraulic cylinder to form a round shank and a round shank to stop the movement of the driving mechanism.

[0007] By setting up a rotating main shaft, a base, a central axis, a sensor cover, a pressure differential sensor, a pressure differential rod, an upper extrusion plate, a stepper motor, a push rod and a lower extrusion plate, during normal operation, the stepper motor feeds the push rod to drive the lower extrusion plate to squeeze the upper extrusion plate, and at the same time the pressure sensor reads the pressure brought by the pressure differential rod to obtain a stable pressure value. When the rake concentrator is working, if the base falls off due to a fault, the pressure sensor converts the change in the pressure difference before and after into a change in the built-in pressure-sensitive element of the sensor. When the read pressure value decreases, the remote control terminal stops the machine operation in time, which is conducive to stopping the operation in time after the fault occurs. At the same time, the pressure differential sensor activates the alarm system to effectively remind the staff to discover the fault and avoid further damage to the equipment.

[0008] In a preferred solution, a plurality of rake frames are provided on the outside of the base, and the plurality of rake frames are equidistantly distributed around the base in a circle, three buckles are fixedly connected to the upper side of the base, and hooks are connected to the outer sides of the three buckles, the upper sides of the three hooks are fixedly connected to tension spring rods, the upper sides of the three tension spring rods are fixedly connected to arc frames, three equidistantly circumferential sliding grooves are opened on the central axis, the interiors of the three sliding grooves are movably connected to sliders, the lower sides of the sliders are fixedly connected to buffer spring rods, the lower side of the buffer spring rod and the bottom of the sliding groove are fixedly connected, and the three buckles are respectively located on the outer sides of the three sliding grooves, and the other ends of the three arc frames are respectively fixedly connected to the three sliding seats.

[0009] By providing a rake frame, a rotating spindle, a buckle, a hook, a tension spring rod, an arc frame, a slider and a buffer spring rod, when the equipment fails and the rake frame falls off, the arc frame connects the base and the central axis, and the arc frame pulls the base, and the slider starts to slide down in the sliding groove. During the process, the arc frame pulls the base (the tension spring rod between the buckle and the hook is elastically connected, and the elastic properties of the spring are used to perform a pulling effect), which effectively alleviates the falling of the rake frame. At the same time, when the slider slides down in the slider groove due to the tension, the buffer spring rod has a buffering effect due to the elastic effect of the spring, which better reduces the impact of the rake frame on the arc frame when it falls off.

[0010] In a preferred embodiment, a concentration tank is provided on the outside of the rotating main shaft, and a support plate is fixedly connected to the inner wall of the concentration tank, one end of the support plate is fixedly connected to a support cylinder, a second circular hole is provided inside the support cylinder, the rotating main shaft is located inside the second circular hole and is rotatably connected through a bearing, and a motor support frame is fixedly connected to the upper side of the support cylinder, a rotating motor is fixedly connected to the upper side of the motor support frame, the output shaft of the rotating motor is movably connected to a short shaft, and a second through-hole is provided on the motor support frame, the other end of the short shaft passes through the second through-hole and is fixedly connected to the rotating main shaft.

[0011] The rake thickener is equipped with a concentration tank, a support plate, a support cylinder, a motor support frame and a rotating motor. When the rake thickener is started, the concentration tank and the support plate fix the position of the support cylinder, and the rotating motor drives the central rotating shaft to rotate. During the process, the rake frame rotates in the concentration tank through the rotation of the central rotating shaft, squeezing out the water in the material while leaving the solid matter at the bottom of the tank.

[0012] From the above, it can be seen that the utility model provides an anti-rake-off rake-type concentrator. During the rotation process, the rake frame falls off. Since the rake frame is located below the surface of the concentrating tank, it cannot be discovered in time after falling off, resulting in damage to the machine. At the same time, the pressure differential sensor activates the alarm system, effectively reminding the staff to discover the fault and avoid the technical effect of the scenario where the equipment is further damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of an anti-rake-falling rake-type concentrator proposed by the utility model.

[0014] Figure 2 This is a schematic diagram of the overall top view of the structure of an anti-rake-falling rake-type concentrator proposed by the utility model.

[0015] Figure 3 This is a schematic diagram of the internal structure of an anti-rake-falling rake-type concentrator proposed by the utility model.

[0016] Figure 4 This is a schematic diagram of the base structure of an anti-rake-off rake-type concentrator proposed in the utility model.

[0017] Figure 5 This is a schematic diagram of the central axis structure of an anti-rake-falling rake-type concentrator proposed by the utility model.

[0018] In the attached figure: 1. Concentration tank; 2. Support plate; 3. Rotating motor; 4. Motor support frame; 5. Support cylinder; 6. Rotating main shaft; 7. Center shaft; 8. Base; 9. Rake frame; 10. Arc frame; 11. Tension spring rod; 12. Hook; 13. Buckle; 14. Slider; 15. Buffer spring rod; 16. Sensor cover; 17. Pressure difference sensor; 18. Pressure difference rod; 19. Upper extrusion plate; 20. Lower extrusion plate; 21. Push rod; 22. Stepper motor. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] The utility model discloses an anti-rake-off rake-type concentrator mainly used in existing devices where the rake frame may fall off during rotation. Since the rake frame is located below the surface of the concentrating tank, it cannot be discovered in time after falling off, resulting in damage to the machine. At the same time, the pressure difference sensor activates the alarm system, effectively reminding the staff to discover the fault and avoid further damage to the equipment.

[0021] Reference Figure 1-Figure 5 , an anti-rake-off rake-type concentrator, comprising a base 8 and a rotating main shaft 6, characterized in that the lower side of the rotating main shaft 6 is connected to the upper side of the base 8 by bolts, a central shaft 7 is provided above the base 8, and a circular hole 1 is provided at the center position of the central shaft 7, the rotating main shaft 6 passes through the circular hole 1 and is connected to the central shaft 7 by bolts, the side wall of the central shaft 7 is connected to a sensor cover 16 by bolts, the interior of the sensor cover 16 is connected to a pressure differential sensor 17 by bolts, the input end of the pressure differential sensor 17 is connected to a pressure differential rod 18 through a coupling, and the bottom of the sensor cover 16 A through-hole is provided on the top, one end of the pressure differential rod 18 passes through the through-hole of the sensor cover 16 and is connected to the upper extrusion plate 19 by bolts. A cavity is opened inside the base 8, and the cavity is located below the sensor cover 16. The upper extrusion plate 19 is located on the upper side of the cavity. The bottom inner wall of the cavity is connected to the stepper motor 22 by bolts, and the output shaft of the stepper motor 22 is connected to the short shaft through a coupling. The top of the short shaft is connected to the push rod 21 by bolts, and the top of the push rod 21 is connected to the lower extrusion plate 20 through a bearing. The lower extrusion plate 20 is in contact with the upper extrusion plate 19 above.

[0022] Reference Figure 3 、 Figure 4 and Figure 5 In a preferred embodiment, a plurality of rake frames 9 are provided on the outside of the base 8, and the plurality of rake frames 9 are equidistantly distributed around the base 8 in a circle. The upper side of the base 8 is connected with three buckles 13 by bolts, and the three buckles 13 are outer-mounted with hooks 12, the upper sides of the three hooks 12 are connected with tension spring rods 11 by bolts, the upper sides of the three tension spring rods 11 are connected with arc frames 10 by bolts, three equidistant sliding grooves are opened on the central axis 7, the interior of the three sliding grooves are slidably connected with sliders 14, the lower sides of the sliders 14 are connected with buffer spring rods 15 by bolts, the lower side of the buffer spring rod 15 and the bottom of the sliding groove are connected by bolts, and the three buckles 13 are respectively located on the outside of the three sliding grooves, and the other ends of the three arc frames 10 are respectively connected to the three slide seats by bolts.

[0023] Reference Figure 1 、 Figure 2 and Figure 3In a preferred embodiment, a concentration tank 1 is provided on the outside of the rotating main shaft 6, and the inner wall of the concentration tank 1 is connected to the support plate 2 by bolts, one end of the support plate 2 is connected to the support cylinder 5 by bolts, and a circular hole 2 is opened inside the support cylinder 5. The rotating main shaft 6 is located inside the circular hole 2 and is rotatably connected through a bearing, and the upper side of the support cylinder 5 is connected to the motor support frame 4 by bolts, and the upper side of the motor support frame 4 is connected to the rotating motor 3 by bolts. The output shaft of the rotating motor 3 is connected to the short shaft through a coupling, and a through hole 2 is opened on the motor support frame 4, and the other end of the short shaft passes through the through hole 2 and is connected to the rotating main shaft 6 by bolts.

[0024] Working principle: When the rake thickener is started, the thickening tank 1 and the support plate 2 fix the position of the support cylinder 5, and the rotating motor 3 drives the rotating main shaft 6 to rotate. During the process, the rake frame 9 rotates in the thickening tank 1 through the rotation of the rotating main shaft 6, squeezing out the water in the material while leaving the solid matter at the bottom of the tank.

[0025] When the rake concentrator is working normally, the stepper motor 22 feeds the push rod 21, driving the lower extrusion plate 20 to squeeze the upper extrusion plate 19. At the same time, the differential pressure sensor 17 reads the pressure brought by the differential pressure rod 18 to obtain a stable pressure value. During operation, if the base 8 falls off due to a malfunction, the differential pressure sensor 17 converts the change in the pressure difference before and after into a change in the built-in pressure-sensitive element of the sensor. When the read pressure value decreases, the remote control terminal stops the machine operation in time.

[0026] When the rake thickener fails and the rake frame 9 falls off, the arc frame 10 connects the base 8 and the central shaft 7, and the arc frame 10 pulls the base 8, while the slider 14 starts to slide down in the sliding groove.

[0027] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The replacements described may be partial structures, devices, or method steps, or they may be complete technical solutions. Any equivalent replacements or modifications based on the technical solution and the concept of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A rake-type concentrator with an anti-rake-off function, comprising a base (8) and a rotating main shaft (6), characterized in that: The lower side of the rotating main shaft (6) is fixedly connected to the upper side of the base (8), a central shaft (7) is provided above the base (8), and a circular hole (1) is provided at the center position of the central shaft (7), the rotating main shaft (6) passes through the circular hole (1) and is fixedly connected to the central shaft (7), a sensor cover (16) is fixedly connected to the side wall of the central shaft (7), a pressure differential sensor (17) is fixedly connected to the inside of the sensor cover (16), an input end of the pressure differential sensor (17) is connected to a pressure differential rod (18) through a coupling, and a through hole (1) is provided at the bottom of the sensor cover (16), and the pressure differential rod (18) One end of the base (8) passes through a through hole of the sensor cover (16) and is fixedly connected to an upper extrusion plate (19). A cavity is provided inside the base (8), and the cavity is located below the sensor cover (16). The upper extrusion plate (19) is located on the upper side of the cavity. A stepper motor (22) is fixedly connected to the bottom inner wall of the cavity, and the output shaft of the stepper motor (22) is connected to a short shaft through a coupling. A push rod (21) is fixedly connected to the top of the short shaft. The top of the push rod (21) is connected to a lower extrusion plate (20) through a bearing. The lower extrusion plate (20) is in contact with the upper extrusion plate (19).

2. The anti-rake-off rake thickener according to claim 1, characterized in that: A plurality of rake frames (9) are arranged outside the base (8), and the plurality of rake frames (9) are equidistantly distributed around the base (8) in a circumference.

3. The anti-rake-falling rake thickener according to claim 2, characterized in that: Three buckles (13) are fixedly connected to the upper side of the base (8), and hooks (12) are connected to the outer sides of the three buckles (13). The upper sides of the three hooks (12) are fixedly connected to tension spring rods (11), and the upper sides of the three tension spring rods (11) are fixedly connected to arc frames (10).

4. The anti-rake-falling rake thickener according to claim 1, characterized in that: The central shaft (7) is provided with three sliding grooves with equal distances from each other. The interiors of the three sliding grooves are all movably connected with sliders (14). The lower sides of the sliders (14) are all fixedly connected with buffer spring rods (15). The lower sides of the buffer spring rods (15) and the bottoms of the sliding grooves are fixedly connected. The three buckles (13) are respectively located on the outer sides of the three sliding grooves. The other ends of the three arc-shaped frames (10) are respectively fixedly connected with the three slide seats.

5. The anti-rake-falling rake thickener according to claim 1, characterized in that: A concentration tank (1) is provided outside the rotating main shaft (6), and a support plate (2) is fixedly connected to the inner side wall of the concentration tank (1), and a support cylinder (5) is fixedly connected to one end of the support plate (2).

6. The anti-rake-falling rake thickener according to claim 5, characterized in that: A second circular hole is provided inside the support tube (5), and the rotating main shaft (6) is movably connected to the inside of the second circular hole, and the upper side of the support tube (5) is fixedly connected to the motor support frame (4).

7. The anti-rake-falling rake thickener according to claim 6, characterized in that: The upper side of the motor support frame (4) is fixedly connected to a rotating motor (3), the output shaft of the rotating motor (3) is connected to a short shaft through a coupling, and a second through-hole is provided on the motor support frame (4), and the other end of the short shaft passes through the second through-hole and is fixedly connected to the rotating main shaft (6).

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