CN217940513U - Automatic disengagement protection mechanism for preventing overload of centrifugal machine - Google Patents

Abstract

The utility model discloses an automatic release protection mechanism for preventing overload of a centrifuge, which includes a rocker arm and a reflection mechanism, and is characterized in that the rocker arm includes a rocker arm plate and a connecting sleeve, and the center of the upper end of the rocker arm plate is provided with a There is a connecting sleeve, and the reflection mechanism includes a seat plate and a swing rod, a spring ejector rod, a spring cylinder, and a travel switch arranged in the seat plate; the rocker arm plate is an integral structure with a fan-shaped upper end and a rectangular lower end. A compression spring is provided inside the spring cylinder, and a top cover is provided at both ends of the compression spring; a switch seat plate and a travel switch are provided above the spring cylinder, and the travel switch is fixed on the switch seat board by screws, so The push rod of the travel switch faces the spring cylinder; the utility model has the characteristics of strong practicability, high safety and simple operation.

Description

An automatic disengaging protection mechanism for preventing centrifuge from overloading

technical field

The utility model relates to the technical field of centrifuge equipment, in particular to an automatic disengagement protection mechanism for preventing the centrifuge from being overloaded.

Background technique

The horizontal screw discharge centrifuge is based on the principle of obtaining different sedimentation velocities in the centrifugal force field by using the liquid phase and solid phase with different densities and immiscibility in the mixed liquid, so that the solid particles can settle to achieve solid-liquid separation. .

The horizontal screw discharge centrifuge is equipped with a transmission mechanism different from other types of centrifuges. The transmission chain of this mechanism is composed of a pulley, a drum, a gear box casing, an internal planetary gear train, an input shaft, an output shaft and a screw. Conveyors together.

The input shaft of the gear box is connected to the fixed hole of the fixed seat through the locking gland. Since the fixed seat has been welded on the machine base, the input shaft is completely blocked (that is, the first-stage sun gear in the planetary gear train). speed is zero), the inner ring gear of the gear box will drive multiple internal planetary gears around the sun gear for compound motion of rotation and revolution, so that the rotation of the planetary system rod will drive the output shaft and finally drive the screw conveyor to rotate and push the slag .

The gear box connects the drum and the screw conveyor to ensure a stable speed difference between them so that the sediment in the drum can be pushed out. It is the most critical part in the transmission mechanism of this type of centrifuge.

If the solid phase concentration in the mixed liquid to be separated by the centrifuge is high (above 40%), the solid phase sediment particles are hard and easy to harden (such as sulfur gypsum, coal washing, kaolin classification, etc.), and the friction coefficient with the inner wall of the drum is relatively large , at this time, the resistance of the screw conveyor to push the sediment will be significantly increased. When the resistance exceeds the strength limit that the transmission mechanism can bear, it will destroy the weakest link in the transmission chain, that is, the inner ring gear and the planetary gear of the gear box will be damaged. If the teeth of the centrifuge are broken and can no longer work normally, if the centrifuge is still continuously feeding through the feeding pipe at this time, and the screw conveyor can no longer push the sediment outward, the space inside the centrifuge drum will be blocked. If the sediment is completely blocked, the screw conveyor will also be completely blocked and stuck and can no longer be driven by the motor to rotate. If it is necessary to return to normal, the centrifuge must be disassembled, manually remove the clogged sediment in the drum, and then reassemble the whole machine. At the same time, it is necessary to replace the new expensive gearbox housing (ie, the inner ring gear) and the planetary gears, as well as other damaged parts.

Utility model content

In view of the problems existing in the prior art, the utility model discloses an automatic disengagement protection mechanism for preventing the centrifuge from being overloaded, which solves the problems mentioned in the above-mentioned background technology, and provides a safe, reliable, practical and easy maintenance operation Simple and special protection mechanism for overload prevention and automatic disengagement of horizontal screw discharge centrifuge.

The utility model adopts the following technical solutions:

An automatic disengaging protection mechanism for preventing overloading of a centrifuge, including a rocker arm and a reflection mechanism, characterized in that the rocker arm includes a rocker plate and a connecting sleeve, and the upper end of the rocker plate is fan-shaped and the lower end is strip-shaped The integrated structure of the rocker arm plate is provided with a connecting sleeve at the center of the upper end, and the reflection mechanism includes a seat plate and a swing rod, a spring ejector rod, a spring cylinder, and a travel switch arranged in the seat plate; An input shaft notch is provided, and a fixed keyway is provided in the input shaft notch, and a screw hole is provided at the bottom of the lower end of the rocker arm, and a suitable roller pin is provided in the screw hole, and a suitable The matching roller cover; the upper end of the seat plate is provided with a fixed limit pin hole, and the fixed limit pin hole is provided with an adapted fixed limit pin, and the bottom right of the fixed limit pin hole is provided with a pendulum Rod rotation pin hole, the swing rod has an arc-shaped structure, a swing rod rotation pin is arranged at the center of the swing rod, the swing rod rotation pin hole is adapted to the swing rod rotation pin, and the swing rod rotates through the swing rod The pin and the swing rod rotation pin hole are fixed on the seat plate, and the bottom right of the swing rod rotation pin hole is provided with a fixed pin hole, and the fixed pin hole is provided with a suitable fixed pin, and the middle position of the other end of the seat plate is A spring cylinder rotation pin hole is provided, a compression spring is arranged inside the spring cylinder, a top cover is provided at both ends of the compression spring, a spring cylinder rotation pin is provided at the top cover of one end of the spring cylinder, the The rotation pin hole of the spring cylinder is adapted to the rotation pin of the spring cylinder, and the spring cylinder is fixed on the seat plate through the rotation pin of the spring cylinder and the rotation pin hole of the spring cylinder, and the top cover at the other end of the spring cylinder is provided An adjustment nut, one end of the adjustment nut is connected to the top cover, and the other end of the spring nut is provided with a spring push rod; The rocker arm transmits force to the swing rod through the roller sleeve to maintain the balance between the roller sleeve and the swing rod. The other end of the swing rod is provided with a movable pin, and the swing rod is connected to the spring push rod through the movable pin; A switch seat plate and a travel switch are arranged above the spring cylinder, the travel switch is fixed on the switch seat plate by screws, and the travel switch push rod faces the spring cylinder.

Further, the rocker arm plate, the swing rod, and the seat plate are made of steel plates and steel frames.

Further, the fan-shaped structure at the upper end of the rocker plate is wider than the bar-shaped structure at the lower end.

Compared with the prior art, the beneficial effects of the utility model are:

The utility model is an automatic disengaging protection mechanism for preventing overload of a centrifuge, which includes a rocker arm and a reflection mechanism. The reflection mechanism includes a seat plate, a swing rod, a spring ejector rod, a spring cylinder, and a travel switch arranged in the seat plate; When the centrifuge runs to the peak of the load, the input shaft can generate a torque greater than the spring force, the rocker arm will push the swing rod away, and the input shaft will run idling, so the entire gear box will not be stressed, reducing the internal load of the gear box The gear teeth of the ring gear and the planetary gear are lost, and at the same time, the spring cylinder moves upwards, triggering the travel switch, which is connected to the automatic feeding port, and the travel switch transmits the electrical signal to the automatic feeding door, and the automatic feeding door automatically Shut down and alarm to stop at the same time. After taking relevant measures to reduce the resistance of slag pushing (such as reducing the solid phase concentration, reducing the amount of feed, etc.), if you need to restore the equipment to normal, just clamp the swing lever with an adjustable wrench and turn it clockwise. The position of the limit pin is sufficient. Because the feeding is stopped in time when the drum is overloaded, there will be no need to dismantle the machine due to the clogging of the drum; the utility model not only improves the use efficiency of the equipment, but also reduces the cost of manual maintenance and unnecessary equipment loss of hardware

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a detailed view of the structure of the rocker arm of the present invention;

Fig. 3 is a detailed view of the seat plate structure of the present invention;

Fig. 4 is a side view of the overall structure of the utility model;

Fig. 5 is the front view of the overall structure of the utility model;

In the figure: 1. Feed inlet, 2. Motor drive pulley, 3. Slag rejection port, 4. Drum, 5. Discharge port, 6. Cabinet, 7. Screw conveyor, 8. Overflow hole, 9 , output shaft, 10, gear box, 11, input shaft, 12, fixed keyway, 13, input shaft notch, 14, frame, 15, rocker arm plate, 16, fixed key, 17, roller pin, 18, Fork, 19, seat plate, 20, fixed limit pin, 21, fork rotation pin, 22, fixed pin, 23, movable pin, 24, spring push rod, 25, adjusting nut, 26, top cover, 27, Compression spring, 28, spring cylinder, 29, spring cylinder rotation pin, 30, ejector rod, 31, switch seat plate, 32, travel switch, 33, screw, 34, connecting sleeve, 35, fixed limit pin hole, 36, the fork rotation pin hole, 37, the fixed pin hole, 38, the spring cylinder barrel rotation pin hole.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model have been clearly and completely described above in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

The utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to Figures 1 to 4, an automatic disengagement protection mechanism for preventing overload of a centrifuge, including a rocker arm and a reflection mechanism. , Spring cylinder 28, travel switch 32; Compression spring 27 is arranged in described spring cylinder 28, and top cover 26 is arranged at two ends of described compression spring 27; Switch seat plate 31 and travel switch 32 are arranged above spring cylinder 28 , the travel switch 32 is fixed on the switch seat plate 31 by a screw 33, and the push rod 30 of the travel switch 32 faces the spring cylinder 28;

Wherein, the rocker arm plate 15, the swing rod 18, and the seat plate 19 are made of steel plates and steel frames. The structure of the rocker arm is shown in FIG. A connecting sleeve 34 is arranged at the center of the upper end of the arm plate 15, and an input shaft notch 13 is arranged inside the connecting sleeve 34, and a fixed key 16 groove 12 is arranged on the edge of the input shaft notch 13, and the rocker arm needs to be set in a horizontal spiral unloading centrifuge. On the input shaft 11 of the mechanical gear box 10, the input shaft 11 is installed in the installation sleeve through the input shaft notch 13, and the two are connected into one body for synchronous rotation through the fixed key 16 groove 12;

The rocker arm is shown in Figure 2. Since the rocker arm automatically disengages from the input shaft 11 when it is overloaded, it will idle at high speed. In order to avoid additional dynamic load due to uneven quality and damage the input shaft 11 connected to it, Therefore, the rocker arm plate 15 is set as an integrated structure with the upper end being fan-shaped and the lower end being strip-shaped. The width of the upper end of the rocker arm plate 15 is narrower than the width of the lower end. The length can not only save metal materials, but also reduce the safety accidents of operators during operation. A screw hole is set on the top of the lower end of the rocker arm, and the screw hole is set with a suitable roller pin 17. The roller pin 17 is provided with a suitable roller sleeve, and is close to the force-bearing surface of the swing rod 18 to resist the screw conveyor. 7 Torque transmitted through the gear box 10.

Seat plate 19 as shown in Figure 3, is drilled with four screw holes on it, from left to right, from top to bottom, is respectively fixed limit pin hole 35, fork rotation pin hole 36, fixed pin hole 37, spring Cylinder rotation pin hole 38; respectively used to install the rotation pin of the fixed limit pin 20, the swing rod 18, the fixed pin 22 and the rotation pin of the spring cylinder 28. The fixed limit pin 20 and the fixed pin 22 are respectively used to limit the positions of the swing rod 18 after disengagement and normal operation. Described swing rod 18 is arc-shaped structure, and swing rod rotation pin 21 is arranged at the center of described swing rod 18, and swing rod 18 is fixed on the seat plate 19 by swing rod rotation pin 21 and swing rod rotation pin 21 holes, and swing rod 18 one end Engaged with the roller sleeve, the other end of the swing rod 18 is provided with a movable pin 23, and a compression spring 27 is provided in the spring cylinder 28, and a top cover 26 is provided at both ends of the compression spring 27, and one end of the spring cylinder 28 is topped. A spring cylinder rotating pin 29 is arranged at the cover 26, and the spring cylinder 28 is fixed on the seat plate 19 through the spring cylinder rotating pin 29 and the spring cylinder rotating pin 29 holes. An adjusting nut 25 is set, one end of the adjusting nut 25 is connected to the top cover 26, the other end of the spring nut is provided with a spring ejector rod 24, and the swing rod 18 is hinged together with the coupling head of the spring ejector rod 24 through the movable pin 23 and can rotate flexibly , the spring force is applied to the spring top rod 24, and the torsion force transmitted by the swing rod 18 and the screw conveyor 7 is balanced.

Working principle of horizontal screw discharge centrifuge:

The horizontal screw discharge centrifuge is based on the principle of obtaining different sedimentation velocities in the centrifugal force field by using the liquid phase and solid phase with different densities and immiscibility in the mixed liquid, so that the solid particles can settle to achieve solid-liquid separation. . The structure of this model is shown in Figure 1, and it is mainly composed of drum 4, casing 6, screw conveyor 7, gear box 10, machine base 14, bearing housing, motor drive device and other parts.

When the solid-liquid mixed slurry enters the screw conveyor 7 through the feed pipe 1, and then enters the drum 4 from the outlet 5, the drum 4 is rotating at a high speed through the motor-driven pulley 2, so the solid with a higher density The phase matter centrifugally settles in the outer ring near the inner wall of the drum 4, while the liquid phase with a lower density stays in the inner ring near the center of the drum. Since the outer shell of the gear box 10 and the drum 4 are rigidly connected to form a Synchronous rotation, and the input shaft 11 of the gear box 10 is fixed on the base 14, so the inner ring gear of the box 10 will drive the planetary gear train in the box to rotate at a fixed speed ratio, and finally pass the output The shaft 9 drives the screw conveyor 7 to rotate at a speed different from that of the drum 4, so that the solid sediment in the drum is pushed to the cone end of the drum 4 for further extrusion and deliquification and is discharged from the slag rejection port 3, while the liquid phase is It is thrown out from the overflow hole 8 at the other end of the drum 4.

The working principle of the utility model: when the horizontal screw unloading centrifuge reaches the upper limit of the working load, the resistance of the screw conveyor 7 to push the sediment increases, and the torque borne by the input shaft 11 will also increase proportionally. When the strength of the system is limited, the input shaft 11 bears the torsion from the screw pushing slag through the rocker arm and transmits the torque formed by the swing rod 18, and the torque formed by transmitting the spring force greater than the spring to the swing rod 18, so the swing The rod 18 presses the spring top rod 24 into the cylinder, and rotates counterclockwise to the position of the limit pin, so the rocker arm is no longer blocked by the swing rod 18 and is completely disengaged and idling, that is, the input shaft of the gear box 10 11 is no longer fixed, and the internal planetary gear train immediately idles synchronously with the inner ring gear of the housing without being stressed, thereby ensuring the safety of the planetary gear train.

In addition, the switch seat plate 31 is welded at the appropriate position of the bottom plate of the automatic disengagement protector, and then the travel switch 32 is fixed on the switch seat plate 31 by screws 33. When overload occurs, the spring cylinder 28 must rotate upwards. , so as to touch the ejector rod 30 of the limit switch 32 and trigger the electrical signal. If the centrifuge is equipped with an automatic feed port 1 (such as a pneumatic, hydraulic or electric ball valve), the interaction between the feed port 1 and the trigger signal can be realized. When the lock is activated, the feeding port 1 will be automatically closed immediately, and the machine will alarm and stop at the same time.

After taking relevant measures to reduce the slag pushing resistance (such as reducing the solid phase concentration, reducing the feeding amount, etc.), if you need to restore the equipment to normal, you only need to clamp the swing rod 18 with an adjustable wrench, and turn it clockwise to the position of the limit pin That's it. Because the feeding is stopped in time when overloaded, there will be no need to dismantle the machine due to the clogging of the drum 4 with sediment, which improves the use efficiency of the equipment.

The adjustment nut 25 can adjust the compression of the spring, thereby adjusting the size of the spring force, that is, the overload action setting value of the automatic disengagement protector. This setting value should ensure that the transmission mechanism of the centrifuge is not damaged, but it cannot Frequent actions due to low set value affect work efficiency.

The above are only preferred embodiments of the utility model, and do not limit the utility model in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art, without departing from the scope of the technical solution of the present utility model, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the utility model, or modify it into an equivalent change, etc. effective example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical proposal of the present invention.

Claims (3)

1. An automatic disengagement protection mechanism for preventing overload of a centrifugal machine comprises a rocker arm and a reflection mechanism, and is characterized in that the rocker arm comprises a rocker arm plate and a connecting sleeve, the rocker arm plate is of an integrated structure with a fan-shaped upper end and a strip-shaped lower end, the connecting sleeve is arranged at the center of the upper end of the rocker arm plate, and the reflection mechanism comprises a seat plate, and a swing rod, a spring ejector rod, a spring cylinder barrel and a travel switch which are arranged in the seat plate; an input shaft notch is formed in the connecting sleeve, a fixed key groove is formed in the input shaft notch, a screw hole is formed in the bottom of the lower end of the rocker arm, an adaptive roller pin is arranged in the screw hole, and an adaptive roller sleeve is arranged on the roller pin; a fixed limit pin hole is formed above one end of the seat plate, a matched fixed limit pin is arranged in the fixed limit pin hole, a swing rod rotating pin hole is formed in the right lower portion of the fixed limit pin hole, the swing rod is of an arc-shaped structure, a swing rod rotating pin is arranged in the center of the swing rod, the swing rod rotating pin hole is matched with the swing rod rotating pin, the swing rod is fixed to the seat plate through the swing rod rotating pin and the swing rod rotating pin hole, a fixed pin hole is formed in the right lower portion of the swing rod rotating pin hole, a matched fixed pin is arranged in the fixed pin hole, a spring cylinder rotating pin hole is formed in the middle of the other end of the seat plate, a compression spring is arranged in the spring cylinder, top covers are arranged at two ends of the compression spring, a spring cylinder rotating pin is arranged at one end of the spring cylinder, the spring cylinder rotating pin hole is matched with the spring cylinder rotating pin, the spring cylinder is fixed to the seat plate through the spring cylinder rotating pin hole, an adjusting nut is arranged at the other end of the spring cylinder, one end of the adjusting nut is connected with the top cover, and a spring ejector rod is arranged at the other end of the spring; one end of the swing rod is a stress surface, the stress surface at one end of the swing rod is clamped with the roller sleeve, the rocker arm transmits force to the swing rod through the roller sleeve so as to maintain the balance between the roller sleeve and the swing rod, the other end of the swing rod is provided with a movable pin, and the swing rod is connected with a spring ejector rod through the movable pin; a switch seat plate and a travel switch are arranged above the spring cylinder, the travel switch is fixed on the switch seat plate through screws, and a travel switch ejector rod faces towards the spring cylinder.

2. The automatic disconnect protection mechanism of claim 1, wherein: the rocker arm plate, the swing rod and the seat plate are made of steel plates and steel frames.

3. The automatic disconnect protection mechanism of claim 1, wherein: the fan-shaped structure at the upper end of the rocker arm plate is wider than the strip-shaped structure at the lower end.

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