Safe feeding device of mixer for concrete test
By installing a grid-like protective mesh cover at the loading port of the concrete test mixer and combining limit switches and relay control, the safety hazards and environmental pollution during the use of the mixer are solved, and safe operation and environmental protection effects are achieved.
Patent Information
- Application Number
- CN202321560120.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-19
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2033-06-19
AI Technical Summary
During the use of existing concrete test mixers, there are risks of contact between hands and mixing blades and environmental pollution problems, and their safety and environmental protection are insufficient.
Install a grid-shaped protective mesh cover with a height of ten centimeters above the feeding port of the mixer, and connect it to the protective mesh cover handle through a butterfly nut. The preset limit switch and the intermediate relay control the jog and continuous switch to prevent slurry during stirring Splashing and mistaken touching of people.
It has achieved safe operation and reduced environmental pollution, met the JG244-2009 standard requirements of "Mixer for Concrete Test" and reduced the risk of personnel and mixing blades accidentally touching during continuous operation of the mixer.
Smart Images
Figure CN222309290U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of concrete, in particular to a feeding safety device for a mixer used for concrete testing. Background Art
[0002] During the test and verification process, the concrete test mixer is used frequently in daily life. When people use it and check the status of the concrete, there is a risk of hand contact with the mixing blades, which poses a major safety hazard. In addition, when the material is being mixed, slurry water is prone to splash out from the feeding port, causing a certain degree of environmental hygiene pollution. Summary of the invention
[0003] The problem to be solved by the utility model is: in order to overcome the safety and environmental protection deficiencies of the existing forced single-horizontal-shaft concrete mixer, a feeding safety device with a simple and reasonable structure and convenient operation is provided.
[0004] The specific technical solution adopted by the utility model to solve its technical problems is: install a 10-centimeter-high grid-shaped protective mesh cover above the feed port of the mixer, and use a butterfly nut to connect it to the handle at the protective mesh cover, so that it is easy to disassemble and add materials, and prevent the slurry from splashing and overflowing during the mixing process, so as to achieve the purpose of reducing environmental pollution. The feed port and the protective mesh cover are installed with preset limit switches, and an intermediate relay is installed in the controller to realize the independent control operation of the inching and continuous switches. When the protective mesh cover is installed in place, the mixer can be continuously mixed normally by pressing the start switch, and the personnel can observe the state of the concrete from above; if the protective cover is removed, the mixer can only be controlled by the inching switch, and the mixer cannot be continuously operated, reducing the risk of accidental contact between personnel and the mixing blades during the continuous operation of the mixer, achieving the purpose of safe use, and meeting the requirements of the JG244-2009 standard "Mixer for Concrete Testing".
[0005] The utility model has the advantages of simple and convenient operation and high safety, and also has the characteristic of reducing pollution to the surrounding environment during use. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Figure 1 It is the three views of the utility model;
[0007] Figure 2 The control circuit diagram of the utility model DETAILED DESCRIPTION
[0008] The utility model is further described below in conjunction with the accompanying drawings.
[0009] exist Figure 1A safety feeding device for a concrete mixer for testing is provided, which comprises a mixer (1), a protective cover (2), a fixing device (3), a limit linkage protection device (5) and a controller (6), and is characterized in that a heightened protective mesh cover (201) is installed above the feed port of the mixer (1), and the feed port and the protective mesh cover (201) are connected by a fixing device (3), and the mixer is provided with a limit linkage protection device (5) installed at the feed port and the protective mesh cover (201). The protective mesh cover (201) is made of a stainless steel mesh with a height of ten centimeters. A butterfly nut (301) is used at the feed port to connect and fix the handle (302) of the protective mesh cover (201) through the fixing device (3). A preset limit switch (501) is installed between the feed port and the protective cover, and the movable contact of the limit switch (501) is linked to the protective mesh cover (201).
[0010] exist Figure 2 In the embodiment, the limit switch (501) is connected in series with the working switch (602) and the intermediate relay (604), the working switch (602) is connected in parallel with the normally open contacts of the intermediate relay (604), and the inching switch (603) is connected in parallel with the normally open contacts of the intermediate relay (604). When the limit switch (501) is closed, the switch is closed, the intermediate relay (604) is energized, the normally open contacts of the intermediate relay (604) are closed, the contactor coil (605) is energized, the mixer motor runs continuously, and the stop switch (601) can be pressed to stop the operation. When the limit switch is opened, the working switch fails, and only the inching switch can be operated.
Claims
1. A safety feeding device for a concrete mixer for testing, comprising a mixer (1), a protective cover (2), a fixing device (3), a limit linkage protection device (5) and a controller (6), characterized in that: A heightened protective mesh cover (201) is installed above the feed opening of the mixer (1), and the feed opening and the protective mesh cover (201) are connected using a fixing device (3). A position limiting linkage protection device (5) is installed between the feed opening and the protective mesh cover (201) of the mixer.
2. A concrete mixer safety feeding device for testing according to claim 1, characterized in that The protective net cover (201) adopts a 10 cm high mesh-shaped protective cover.
3. A concrete test mixer safety feeding device according to claim 1, characterized in that The feeding port is connected and fixed with the handle (302) of the protective net cover (201) by a butterfly nut (301) through a fixing device (3).
4. A concrete test mixer safety feeding device according to claim 1, characterized in that A preset limit switch (501) is installed on the feeding port and the protective cover, and a movable contact of the limit switch (501) is linked with the protective mesh cover (201).