Safety protection device of open mill

Abstract

The utility model provides a safety protection device of an open mill, which is convenient to operate and protects the safety of an operator when the operator enters a material roller space in an abnormal state. The device comprises two side racks; a roller assembly; a connecting rod; a connecting rod is arranged between the front end faces of the racks on the two sides, the two ends of the connecting rod in the length direction are fixedly connected with the lower ends of corresponding swing rods respectively, the upper ends of the swing rods are connected with the corresponding positions of the racks through rotating structures, and the connecting rod covers the axial area of the roller assembly. A limiting switch is arranged on the rack corresponding to power input and connected with the power input end of the roller assembly, when the limiting switch is in an on state, the lower contact end of the limiting switch is in an extending state, the connecting rod rotates towards the lower contact end in a rotating state, and when the limiting switch is in an off state, the connecting rod rotates towards the lower contact end. The periphery of the connecting rod presses the lower contact end and retracts for a certain distance; and the connecting rod resetting device drives the connecting rod to reset without external force.

Description

Technical Field

[0001] The utility model relates to the technical field of an open mixing mill structure, in particular to a safety protection device for an open mixing mill. Background Art

[0002] The material roller of the mixing mill is exposed to the environment. When the operator needs to operate the mixing mill, due to the lack of external safety protection, the power needs to be cut off. The existing power-off operation switches are all set on one side of the frame, which is inconvenient to operate. Therefore, a safety protection device that is easy to operate is urgently needed. Summary of the invention

[0003] In view of the above problems, the utility model provides a safety protection device for an open mixing mill, which is easy to operate and protects the safety of an operator when entering a material roller space under an abnormal state.

[0004] A safety protection device for an open mixing mill, characterized in that it comprises:

[0005] Two side racks;

[0006] Roller assembly;

[0007] link;

[0008] A connecting rod is arranged between the front end surfaces of the frames on both sides, and the lower ends of the corresponding swing rods are fixedly connected at both ends of the connecting rod in the length direction, and the upper end of the swing rod is connected to the corresponding position of the frame through a rotating structure, and the connecting rod covers the axial area of ​​the roller assembly;

[0009] A limit switch is provided on the frame corresponding to the power input, the limit switch is connected to the power input end of the roller assembly, when the limit switch is in an open state, the lower contact end of the limit switch is in an extended state, the connecting rod rotates toward the lower contact end in a rotating state, and when the limit switch is in a closed state, the outer periphery of the connecting rod presses the lower contact end to retract a part of the distance;

[0010] The utility model also comprises a connecting rod resetting device, which drives the connecting rod to be reset without being subjected to external force.

[0011] It is further characterized by:

[0012] The connecting rod reset device is specifically a coil spring, and the rotating structure of the swing rod is integrated with the coil spring. When the connecting rod is not subjected to external force, the coil spring drives the connecting rod to be in a free static state, and the connecting rod does not contact the lower contact end in the free static state;

[0013] The connecting rod reset device is a linear thrust mechanism, which includes a horizontally arranged sleeve, a push rod, and a linear spring. The sleeve is provided with a linear spring, one end of the linear spring is fixed, and the other end of the linear spring is mounted on the push rod. The outer end of the push rod is arranged toward the connecting rod, and the outer end of the push rod protrudes outward from the surface area of ​​the lower contact end to ensure that the connecting rod will not contact the lower contact end and cause the retraction of the lower contact end when it is slightly touched by mistake.

[0014] One end of the sleeve away from the push rod is threadedly connected with a screw rod, which allows the pressure of the linear spring to be adjusted according to actual needs.

[0015] After adopting the above technical scheme, when it is necessary to stop the machine, force is applied to the connecting rod, so that the connecting rod moves toward the lower contact end, and then the lower contact end contracts, so that the limit switch is closed, and the roller is powered off and stops working. After that, the external force is removed, and the connecting rod is reset under the action of the connecting rod reset device, and the lower contact end is pushed out again, the limit switch is opened, and the power of the roller is restored. The connecting rod covers the axial area of ​​the roller assembly, and its operation is convenient. The connecting rod is located between the front end surfaces of the frames on both sides. This space is a space that must be passed through during operation, thereby protecting the operator from inevitably touching the connecting rod when entering the roller space under abnormal conditions, thereby protecting the operator's safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main view structure of the utility model;

[0017] Figure 2 It is a side view cross-sectional structural schematic diagram of the utility model (without the roller assembly);

[0018] Figure 3 It is a partial enlarged view of the specific implementation method of assembling the linear thrust mechanism, connecting rod and limit switch of the utility model;

[0019] Figure 4 It is a partial enlarged view of the assembly of the swing rod, connecting rod and frame of the utility model;

[0020] The names corresponding to the serial numbers in the figure are as follows:

[0021] Frame 10, roller assembly 20, connecting rod 30, rocker arm 40, axial sleeve 41, screw 50, rotary bearing 60, connecting frame 70, limit switch 80, lower contact end 81, connecting rod reset device 90, sleeve 91, push rod 92, linear spring 93, screw 94. DETAILED DESCRIPTION

[0022] A safety protection device for a mixing mill, see Figure 1-Figure 4 , which includes two side frames 10, a roller assembly 20, and a connecting rod 30;

[0023] A connecting rod 30 is arranged between the front end surfaces of the frames 10 on both sides, and the two ends of the connecting rod 30 in the length direction are respectively fixedly connected to the lower ends of the corresponding swing rods 40, and the upper end of the swing rod 40 is connected to the corresponding position of the frame 10 through a rotating structure, and the connecting rod 30 covers the axial area of ​​the roller assembly 20; in specific implementation, the two ends of the connecting rod 30 are respectively fixedly connected to the axial sleeve 41 at the lower end of the swing rod 40 by screws 50, and the upper end of the swing rod 40 is sleeved on the outer ring of the rotating bearing 60, and the rotating bearing 60 is fixedly installed at the corresponding upper positions of the frames 10 on both sides through the connecting frame 70, and the connecting rod 30 performs a swinging operation through the swing rods 40 on both sides;

[0024] A limit switch 80 is provided on the frame 10 corresponding to the power input, and the limit switch 80 is connected to the power input end of the roller assembly 20. When the limit switch 80 is turned on, the lower contact end 81 of the limit switch 80 is in an extended state, and the connecting rod 30 rotates toward the lower contact end 81 in a rotating state. When the limit switch 80 is turned off, the outer periphery of the connecting rod 30 presses the lower contact end 81 to retract a certain distance.

[0025] It also includes a connecting rod resetting device 90, which drives the connecting rod 30 to reset without being subjected to external force.

[0026] In the first specific embodiment, the connecting rod reset device 90 is specifically a coil spring (not shown in the figure), and the coil spring is integrated on the rotating structure of the rocker arm 40. When the connecting rod 30 is not subjected to external force, the coil spring drives the connecting rod 30 to be in a free static state, and the connecting rod does not contact the lower contact end 81 in the free static state.

[0027] In the specific embodiment 2, see Figure 1-Figure 3 : The connecting rod reset device 90 is a linear thrust mechanism, which includes a horizontally arranged sleeve 91, a push rod 92, and a linear spring 93. A linear spring 93 is arranged in the sleeve 91, one end of the linear spring 93 is fixed, and the other end of the linear spring 93 is mounted on the push rod 92. The outer end of the push rod 93 is arranged toward the connecting rod 30, and the outer end of the push rod 93 protrudes outward from the surface area of ​​the lower contact end 81 to ensure that the connecting rod 30 will not contact the lower contact end 81 when it is slightly touched by mistake, causing the lower contact end 81 to retract. When the connecting rod 30 is normally stressed, the push rod 92 is pushed back into the inner cavity of the sleeve, and then the lower contact end 81 is driven to retract and the closing operation of the limit switch 80 is completed. After the external force is removed, the linear spring 93 resets the push rod, thereby making the connecting rod 30 away from the lower contact end 81, and the lower contact end 81 is reset and extended, the limit switch 80 is turned on, and the roller assembly 20 restores power;

[0028] One end of the sleeve 91 away from the push rod is threadedly connected with a screw rod 94, which allows the pressure of the linear spring 93 to be adjusted according to actual needs.

[0029] Its working principle is as follows: when the machine needs to be shut down, force is applied to the connecting rod, so that the connecting rod moves toward the lower contact end, thereby causing the lower contact end to contract, closing the limit switch, and causing the roller to lose power and stop working. After that, the external force is removed, and the connecting rod is reset under the action of the connecting rod reset device, and the lower contact end is pushed out again, the limit switch is turned on, and the power of the roller is restored. The connecting rod covers the axial area of ​​the roller assembly, and its operation is convenient. The connecting rod is located between the front end surfaces of the frames on both sides. This space is a space that must be passed through during operation, thereby protecting the operator from inevitably touching the connecting rod when entering the roller space under abnormal conditions, thereby protecting the operator's safety.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A safety protection device for a mixing mill, characterized in that: It includes: Two side racks; Roller assembly; link; A connecting rod is arranged between the front end surfaces of the frames on both sides, and the lower ends of the corresponding swing rods are fixedly connected at both ends of the connecting rod in the length direction, and the upper end of the swing rod is connected to the corresponding position of the frame through a rotating structure, and the connecting rod covers the axial area of ​​the roller assembly; A limit switch is provided on the frame corresponding to the power input, the limit switch is connected to the power input end of the roller assembly, when the limit switch is in an open state, the lower contact end of the limit switch is in an extended state, the connecting rod rotates toward the lower contact end in a rotating state, and when the limit switch is in a closed state, the outer periphery of the connecting rod presses the lower contact end to retract a part of the distance; The utility model also comprises a connecting rod resetting device, which drives the connecting rod to be reset without being subjected to external force.

2. A safety protection device for an open mixing mill as claimed in claim 1, characterized in that: The connecting rod resetting device is specifically a coil spring, and the rotating structure of the swing rod is integrated with the coil spring. When the connecting rod is not subjected to external force, the coil spring drives the connecting rod to be in a free static state, and the connecting rod does not contact the lower contact end in the free static state.

3. A safety protection device for an open mixing mill as claimed in claim 1, characterized in that: The connecting rod resetting device is a linear thrust mechanism, which includes a horizontally arranged sleeve, a push rod, and a linear spring. A linear spring is arranged in the sleeve, one end of the linear spring is fixed, and the other end of the linear spring is top-mounted on the push rod. The outer end of the push rod is arranged toward the connecting rod, and the outer end of the push rod protrudes outward from the surface area of ​​the lower contact end to ensure that the connecting rod will not contact the lower contact end and cause the lower contact end to retract when it is slightly touched by mistake.

4. A safety protection device for an open mixing mill as claimed in claim 3, characterized in that: One end of the sleeve away from the push rod is threadedly connected with a screw rod.

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