Vibrating screen protection device

Abstract

The utility model discloses a vibrating screen protection device which comprises a vibrating screen, a lower supporting column and an upper supporting column are arranged on the side surface of the vibrating screen respectively, a damping spring is arranged between the lower supporting column and the upper supporting column, and a fixed column and a movable column are further arranged between the lower supporting column and the upper supporting column. The fixed column and the movable column are both arranged on the inner side of the damping spring and are coaxial with the damping spring, a sliding groove is formed in the upper surface of the fixed column, and the movable column is arranged in the sliding groove in a sliding mode. The movable columns and the fixed columns are arranged on the inner sides of the damping springs, the movable columns are arranged in the sliding grooves in the fixed columns in a sliding mode, and the detection devices installed in the sliding grooves can detect breakage of the damping springs in time and send corresponding signals to an external controller, so that the vibrating screen is closed in time, and the vibrating screen stops working; faults such as machine body cracking caused by the fact that the vibrating screen continues to work under the condition that the damping springs are broken are avoided, the vibrating screen plays an effective protection role, and the overall service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of vibrating screens, in particular to a protective device for a vibrating screen. Background Technique

[0002] Vibrating screens are commonly used equipment in industrial production for screening and grading materials. One of the problems that commonly occur in mining vibrating screens during the raw material screening process in industries such as mining and metallurgy is the fracture of the shock-absorbing springs. The shock-absorbing springs will break under the conditions of inconsistent motor excitation force, excessive spring rigidity, insufficient quenching degree, or uneven material load. If the shock-absorbing springs break and the machine is not stopped in time, it will lead to faults such as the cracking of the machine body, which has a great impact on the service life of the equipment. For this reason, we propose a protective device for a vibrating screen. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a protective device for a vibrating screen, which can prevent the vibrating screen from continuing to work in the case of the fracture of the shock-absorbing spring and causing faults such as the cracking of the machine body, effectively protect the vibrating screen, and extend the overall life of the equipment, and can effectively solve the problems in the background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: a protective device for a vibrating screen, including a vibrating screen, the side surfaces of the vibrating screen are respectively provided with a lower support column and an upper support column, a shock-absorbing spring is arranged between the lower support column and the upper support column, a fixed column and a movable column are also arranged between the lower support column and the upper support column, the fixed column and the movable column are both arranged inside the shock-absorbing spring and coaxially arranged with the shock-absorbing spring, a sliding groove is opened on the upper surface of the fixed column, the movable column is slidably arranged in the sliding groove, a plurality of ball grooves are evenly opened on the circumferential side surface of the movable column, and balls are rotatably arranged in the ball grooves, and a detection device is arranged in the sliding groove.

[0005] As a preferred technical solution of the utility model, the detection device includes a groove opened at the bottom of the inner part of the sliding groove, and a distance measuring sensor for measuring the bottom surface of the movable column is installed in the groove.

[0006] As a preferred technical solution of the utility model, the detection device includes a plurality of installation grooves evenly opened on the inner side surface of the sliding groove, an infrared signal receiver is installed in each installation groove, and the plurality of infrared signal receivers are arranged in sequence from top to bottom; installation grooves are also opened on the outer side surface of the movable column, and an infrared signal transmitter matching the infrared signal receiver is installed in the installation groove.

[0007] As a preferred technical solution of the utility model, a buzzer and a plurality of indicator lights are respectively installed on the outer side surface of the vibrating screen.

[0008] As a preferred technical solution of the present utility model, a spring is installed in the ball groove.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows: An active column and a fixed column are arranged inside the shock-absorbing spring. The active column is slidably arranged in the chute of the fixed column. The detection device installed in the chute can detect in time when the shock-absorbing spring breaks and send the corresponding signal to the external controller, timely shut down the vibrating screen to make it stop working, and avoid faults such as the cracking of the machine body caused by the continuous operation of the vibrating screen when the shock-absorbing spring breaks, which effectively protects the vibrating screen and prolongs the overall service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a structural schematic diagram of the present utility model;

[0011] Figure 2 is a partial structural schematic diagram of the present utility model.

[0012] In the figure: 1 vibrating screen, 2 lower support column, 3 upper support column, 4 shock-absorbing spring, 5 indicator light, 6 buzzer, 7 fixed column, 8 active column, 9 chute, 10 ball, 11 spring, 12 infrared signal transmitter, 13 infrared signal receiver, 14 ranging sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all 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.

[0014] Please refer to Figure 1-2, the present utility model provides a technical solution: a vibration screen protection device, including a vibration screen 1. Lower struts 2 and upper struts 3 are respectively arranged on the side surface of the vibration screen 1. A shock-absorbing spring 4 is arranged between the lower strut 2 and the upper strut 3. The lower strut 2, the upper strut 3, the shock-absorbing spring 4 and other parts of the vibration screen are all common structures in existing vibration screens; a fixed column 7 and a movable column 8 are also arranged between the lower strut 2 and the upper strut 3. The fixed column 7 and the movable column 8 are both arranged inside the shock-absorbing spring 4 and are coaxially arranged with the shock-absorbing spring 4, that is, the shock-absorbing spring 4 is sleeved outside the fixed column 7 and the movable column 8. A chute 9 is opened on the upper surface of the fixed column 7. The movable column 8 is slidably arranged in the chute 9. A plurality of ball grooves are evenly opened on the circumferential side surface of the movable column 8. A ball 10 is rotatably arranged in the ball groove. Specifically, there are two sets of ball grooves, one set is arranged on the outer side of the bottom end of the movable column 8, and the other set is arranged in the middle or below the middle of the movable column 8. There are at least three ball grooves in each set, preferably six. The movable column 8 slides up and down in the chute 9 through the balls 10, which can reduce the contact area between each other, thereby reducing the friction force and avoiding affecting the shock-absorbing function of the shock-absorbing spring 4, ensuring the normal operation of the vibration screen 1.

[0015] A detection device is arranged in the chute 9. Specifically, the detection device includes a groove opened at the bottom of the chute 9. A distance measuring sensor 14 for measuring the bottom surface of the movable column 8 is installed in the groove. The distance measuring sensor 14 is electrically connected to the controller of the vibration screen 1 arranged outside. The controller is a common control device of the vibration screen in the prior art. A detection threshold of the distance measuring sensor 14 is preset in the control program built in the controller. The distance measuring sensor 14 detects the distance between the bottom surface of the movable column 8 and the bottom surface of the chute 9 when the vibration screen 1 is working, and transmits a corresponding signal to the controller. The controller converts the signal into a digital signal and compares it with the preset detection threshold. When the shock-absorbing spring 4 breaks, the movable column 8 will move up and down greatly in the chute 9. The distance detected by the distance measuring sensor 14 exceeds the safety threshold. The controller immediately shuts down the vibration screen 1 and prompts the staff to carry out maintenance work, avoiding faults such as the body cracking caused by the vibration screen 1 continuing to work when the shock-absorbing spring 4 breaks, effectively protecting the vibration screen and extending the overall service life of the equipment.

[0016] Optionally, the detection device may also be an infrared signal receiver 13 and an infrared signal transmitter 12 that are electrically connected to the controller of the vibrating screen 1 provided outside. Specifically, the detection device includes a number of mounting grooves evenly formed on the inner surface of the chute 9. The infrared signal receiver 13 is installed in the mounting groove, and a number of infrared signal receivers 13 are arranged in sequence from top to bottom; mounting grooves are also formed on the outer surface of the movable column 8, and the infrared signal transmitter 12 that matches the infrared signal receiver 13 is installed in the mounting groove. Multiple groups of mounting grooves in the chute 9 and on the movable column 8 are also arranged circumferentially. The infrared signal receiver 13 is used to receive the infrared signal emitted by the infrared signal transmitter 12. A plurality of infrared signal receivers 13 are arranged in the height direction, and several infrared signal receivers 13 in the middle are in the safe position, and the infrared signal receivers 13 at the upper and lower ends are in the warning position. When the shock-absorbing spring 4 is in the normal state, the movable column 8 drives the infrared signal transmitter 12 to move up and down at several infrared signal receivers 13 in the safe position, and the external controller does not act; when the shock-absorbing spring 4 breaks, the movable column 8 moves up and down greatly in the chute 9, and the infrared signal transmitter 12 provided thereon moves to the warning position. The infrared signal receiver 13 at the warning position receives the infrared signal and transmits the corresponding signal to the external controller. The controller immediately shuts down the vibrating screen 1 and prompts the staff to perform maintenance work, avoiding faults such as the cracking of the machine body caused by the continuous operation of the vibrating screen 1 when the shock-absorbing spring 4 breaks. The vibrating screen plays an effective protective role and extends the overall life of the equipment.

[0017] In a preferred technical solution, a buzzer 6 and several indicator lights 5 are respectively installed on the outer surface of the vibrating screen 1. The buzzer 6 and the indicator lights 5 are both electrically connected to the controller. The buzzer 6 can remind the staff of the malfunction of the vibrating screen 1 through sound alarm, and the indicator lights 5 can remind the staff of what kind of malfunction has occurred by flashing or lighting up different numbers, colors, etc. Cooperating with the detection device can enable the staff to quickly check and repair the vibrating screen, etc., improving the work efficiency.

[0018] The buzzer 6, the indicator lights 5, the infrared signal receiver 13, the infrared signal transmitter 12, the distance measuring sensor 14, etc. used in this application are all commonly used electronic components in the prior art. Their specific structures, working principles, circuit connections, etc. are all well-known technologies and will not be elaborated here.

[0019] Optional technical solution: Since the vibration of the vibrating screen 1 is multi-directional during operation, and the movable column 8 does not only slide up and down in the chute 9. To further reduce the impact on shock absorption, a spring 11 is provided between the ball 10 and the ball groove, enabling the movable column 8 and the chute 9 to move radially. At the same time, the spring 11 can also play a buffering role for the ball 10, the chute 9, the movable column 8, etc., extending the service life of the device.

[0020] The parts not disclosed in the present utility model are all prior arts, and their specific structures, materials and working principles will not be elaborated further. Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A vibrating screen protection device, comprising a vibrating screen (1), wherein lower struts (2) and upper struts (3) are respectively arranged on the side surface of the vibrating screen (1), and a shock-absorbing spring (4) is arranged between the lower struts (2) and the upper struts (3), characterized in that: A fixed column (7) and a movable column (8) are further arranged between the lower support column (2) and the upper support column (3). The fixed column (7) and the movable column (8) are both arranged inside the shock-absorbing spring (4) and coaxially arranged with the shock-absorbing spring (4). A chute (9) is formed on the upper surface of the fixed column (7). The movable column (8) is slidably arranged in the chute (9). A plurality of ball grooves are evenly formed on the circumferential surface of the movable column (8), and balls (10) are rotatably arranged in the ball grooves. A detection device is arranged in the chute (9).

2. The vibration sieve protection device according to claim 1, characterized in that: The detection device includes a groove formed at the bottom of the chute (9), and a distance measuring sensor (14) for measuring the bottom surface of the movable column (8) is installed in the groove.

3. The vibration sieve protection device according to claim 1, characterized in that: The detection device includes a plurality of mounting grooves evenly formed on the inner surface of the chute (9), and infrared signal receivers (13) are installed in the mounting grooves. The plurality of infrared signal receivers (13) are arranged in sequence from top to bottom; mounting grooves are also formed on the outer surface of the movable column (8), and infrared signal transmitters (12) matching the infrared signal receivers (13) are installed in the mounting grooves.

4. A vibrating screen protection device according to claim 2 or 3, characterized in that: A buzzer (6) and a plurality of indicator lights (5) are respectively installed on the outer surface of the vibrating screen (1).

5. A vibrating screen protection device according to any one of claims 1-4, characterized in that: A spring (11) is installed in the ball groove.

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