Double interlocking switch system for grinding wheel saw and application of double interlocking switch system

Abstract

The invention relates to the technical field of switch interlocking control, and discloses a double-interlocking switch system for a grinding wheel saw and application thereof.The double-interlocking switch system comprises a mechanical lock catch, a magnetic lock catch, a magnetic switch, a control module, a state indicator lamp and a starting switch, and the mechanical lock catch and the magnetic lock catch form double interlocking to open or close a door plate; only when the magnetic attraction lock catch is in an attraction state, the main motor can be started. The situation that a machine body is damaged due to improper manual operation is reduced, the closing stability of the door plate is improved, the service life of the protective cover is prolonged, and the protective cover is prevented from being accidentally opened in the working process of the abrasive wheel saw; meanwhile, the attraction state of the magnetic attraction lock catch is associated with a starting switch of the grinding wheel saw, it is ensured that the grinding wheel saw cannot be started under the condition that the door plate is not closed, and the using safety and stability of the grinding wheel saw are improved.

Description

Technical Field

[0001] The invention relates to the technical field of switch interlocking control, and in particular to a double interlocking switch system for a grinding wheel saw and application thereof. Background Art

[0002] The working principle of the grinding wheel saw, also known as the grinding wheel cutter, is as follows: after the main motor is started, the main motor drives the main shaft of the grinding wheel saw reducer to rotate at high speed, causing the grinding wheel to rotate at high speed; the operator presses the sawing button, and after the equipment completes vertical and horizontal clamping, the grinding wheel comes into contact with the material, and the abrasive particles on its surface cut the material through strong friction and cutting force.

[0003] In order to improve operational safety, facilitate maintenance, and reduce dust and noise pollution, abrasive saws are usually installed in a frame with a door panel. However, the closing of the door panel is currently controlled by a human, and it is often the case that the operator only closes one mechanical lock. This can easily cause the door panel to open due to large vibrations during the sawing process. On the one hand, this poses a great safety hazard, and on the other hand, it can damage the main body of the mechanical lock. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a double interlock switch system for a grinding wheel saw and its application. The switch of the door panel is further controlled by a magnetic lock, which can effectively prevent the door panel from opening accidentally after the grinding wheel saw is started. At the same time, the grinding wheel saw cannot be started if the door panel is not closed, thereby improving the safety and stability of the grinding wheel saw.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: In the first aspect, a double interlock switch system for a grinding wheel saw is provided, comprising: a mechanical lock and a magnetic lock, both of which are installed on the door panel and frame of the grinding wheel saw, for opening or closing the door panel; a magnetic switch, connected to the magnetic lock, for controlling the opening and closing of the magnetic lock; a control module, connected to the magnetic lock and the magnetic switch, for detecting the switching signal of the magnetic switch and the magnetic signal of the magnetic lock, and then judging the working status of the magnetic lock according to the switching signal and the magnetic signal; a status indicator light, connected to the control module, and displaying a corresponding color according to the working status of the magnetic lock; a start switch, connected to the magnetic switch and the main motor of the grinding wheel saw, for controlling the start and close of the main motor, and when the magnetic switch and the start switch are both in a closed state and the magnetic signal is in an attracted state, the main motor starts.

[0006] Optionally, the working states of the magnetic lock include attraction, release and fault; when the magnetic signal is in the attraction state and the switch signal is in the closed state, the magnetic lock is in the attraction state; when the magnetic signal is in the release state and the switch signal is in the disconnected state, the magnetic lock is in the release state; when the magnetic signal is in the attraction state and the switch signal is in the disconnected state, or when the magnetic signal is in the release state and the switch signal is in the closed state, the magnetic lock is in the fault state.

[0007] Optionally, when the magnetic lock is in the engaged state, the status indicator light is green; when the magnetic lock is in the released state, the status indicator light is red; when the magnetic lock is in a fault state, the status indicator light is yellow.

[0008] Optionally, the magnetic switch is a knob switch, and the magnetic lock is powered by an independent power module.

[0009] Optionally, when opening the door panel, first put the magnetic switch into the off state, trigger the status indicator light to turn red, release the magnetic lock, and then open the door panel through the mechanical lock.

[0010] Optionally, after closing the door panel with the mechanical lock, rotate the magnetic switch to the closed state, the trigger status indicator light turns green, and after the magnetic lock is attracted, rotate the start switch to the closed state to start the main motor of the grinding wheel saw.

[0011] In the second aspect, a protective device for a grinding wheel saw is provided, which adopts the double interlock switch system for the grinding wheel saw described in the first aspect, including a frame for installing the grinding wheel saw, a door panel is provided on one side of the frame, a status indicator light is installed on the top of the frame, and a mechanical lock and a magnetic lock are installed on the frame and the door panel.

[0012] Optionally, two mechanical locks are provided, and the magnetic lock is located between the two mechanical locks.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) In the present invention, the magnetic lock and the mechanical lock form a double interlock, which reduces the possibility of damage to the machine body due to improper human operation, increases the stability of the door panel closing and the service life of the protective cover, and prevents it from opening accidentally during the operation of the grinding wheel saw; at the same time, the closed state of the magnetic lock is associated with the start switch of the grinding wheel saw, ensuring that the grinding wheel saw cannot be started when the door panel is not closed, thereby improving the safety and stability of the use of the grinding wheel saw; (2) In the present invention, the investment cost of modifying the overall device by adding a magnetic lock is low, the installation is relatively convenient, the use effect is very obvious, and the unsafe behavior of the operator and the instability of the machine are compensated; (3) In the present invention, the operator can understand the magnetic state of the grinding wheel door panel in real time through the status indicator light, ensuring that subsequent work can be installed stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 2 is a schematic structural diagram of a double interlock switch system for a grinding wheel saw according to an embodiment of the present invention; Figure 2 is a schematic diagram of the process of opening the double interlock switch system in an embodiment of the present invention; Figure 3 is a schematic diagram of a process for closing a double interlock switch system according to an embodiment of the present invention; Figure 4 1 is a schematic structural diagram of a protective device for a grinding wheel saw according to an embodiment of the present invention; Among them, 1. Frame; 2. Door panel; 3. Mechanical lock; 4. Magnetic lock; 5. Status indicator light. DETAILED DESCRIPTION

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention. Example 1

[0016] like Figure 1-Figure 3 As shown, a double interlock switch system for a grinding wheel saw includes a mechanical lock 3, a magnetic lock 4, a magnetic switch, a control module, a status indicator light 5 and a start switch. The mechanical lock 3 and the magnetic lock 4 are both installed on the door panel 2 and the frame 1, and the two form a double interlock to open or close the door panel 2.

[0017] The magnetic switch is electrically connected to the magnetic lock 4 and is used to control the opening (attraction) and closing (release) of the magnetic lock 4; the control module is electrically connected to the magnetic lock 4 and the magnetic switch at the same time. When the control module detects the switching signal of the magnetic switch and the magnetic signal of the magnetic lock 4, the working status of the magnetic lock 4 at this time can be judged according to the switching signal and the magnetic signal.

[0018] The status indicator light 5 is electrically connected to the control module and can display the corresponding light color according to the working status of the magnetic lock 4 given by the control module; the start switch is electrically connected to the magnetic switch and the main motor of the grinding wheel saw at the same time, and its function is to control the start or shut down of the main motor, and the main motor can only be started when the magnetic lock 4 is in the attracted state.

[0019] Specifically, the frame 1 and the door panel 2 together constitute the protective cover of the grinding wheel saw, and the magnetic lock 4 and the mechanical lock 3 form a double interlock, which reduces the occurrence of damage to the mechanical body due to improper human operation, increases the stability of the door panel 2 when closed and the service life of the protective cover, and prevents it from opening accidentally during the operation of the grinding wheel saw; at the same time, the attracted state of the magnetic lock 4 is associated with the start switch of the grinding wheel saw to ensure that the grinding wheel saw cannot be started when the door panel 2 is not closed, thereby improving the safety and stability of the use of the grinding wheel saw.

[0020] Among them, the mechanical lock 3 and the magnetic lock 4 both adopt existing technology, and the magnetic lock 4 is an electromagnetic lock, including a lock body (magnet) and a block (armature). The block is installed on the door panel 2 and is made of magnetic conductive material (such as iron). It is attracted by the magnetic field and engages with the lock body. The lock body is fixed on the frame 1 and contains a coil and a magnetic pole, which corresponds to the block.

[0021] When the lock's coil is energized, it generates a strong magnetic field, which attracts the stopper tightly to the lock body, generating a suction force of tens to hundreds of kilograms, securing door panel 2 to frame 1. While the power is continuously on, the magnetic force maintains the attraction, preventing door panel 2 from opening. When the coil is de-energized, the magnetic field disappears, separating the stopper from the lock body and allowing door panel 2 to open freely.

[0022] Both the magnetic switch and the start switch are knob switches, installed on the operating table, and connected to the corresponding control circuit. The magnetic switch and the start switch here are connected in series, but the magnetic switch can independently control the attraction and release of the magnetic lock 4.

[0023] The control module uses an existing controller, including but not limited to a controller of model ET200. When the circuit where the magnetic switch is located is turned on, current flows through, causing the controller to obtain a switch signal that is in a closed state. When the circuit where the magnetic switch is located is turned off, no current flows through, and the switch signal obtained by the controller is in an open state.

[0024] Similarly, the block and the lock body are connected in series in the detection circuit. When the two are attracted, the circuit is turned on and the controller detects that the magnetic attraction signal is in the attracted state. Conversely, when the two are separated, the circuit is disconnected and the controller detects that the magnetic attraction signal is in the released state.

[0025] As mentioned above, the working states of the magnetic lock 4 include attraction, release and failure. When it is in the attraction state, the grinding wheel saw can be started for cutting. When it is in the release state, the door panel 2 can be opened to replace the saw blade or perform maintenance. When it is in the failure state, it is necessary to stop the machine for inspection and maintenance of its circuit.

[0026] Specifically, when the magnetic signal is in the attracted state and the switch signal is in the closed state, the magnetic lock buckle 4 is in the attracted state; after the magnetic switch is closed, the coil of the magnetic lock buckle 4 is energized, so that the block is adsorbed and fits the lock body, and the detection circuit is turned on, indicating that the magnetic lock buckle 4 is in normal state and in the attracted state.

[0027] When the magnetic signal is in the released state and the switch signal is in the disconnected state, the magnetic lock buckle 4 is in the released state; after the magnetic switch is disconnected, the magnetic lock buckle 4 is released and the detection circuit is disconnected, indicating that the magnetic lock buckle 4 is also normal and in the released state.

[0028] When the magnetic signal is in the engaged state and the switch signal is in the disconnected state, or when the magnetic signal is in the released state and the switch signal is in the engaged state, the magnetic lock 4 is in a faulty state. If the detection circuit remains in the disconnected state after the magnetic switch is closed, or remains in the conductive state after the magnetic switch is disconnected, it indicates that the magnetic lock 4 is operating abnormally and requires shutdown for maintenance.

[0029] In order to facilitate the operator to understand the magnetic state of the grinding wheel door panel 2 in real time and ensure that subsequent work can be installed stably, the different light colors displayed by the status indicator light 5 can be used to intuitively judge which state the magnetic lock buckle 4 is in at this time.

[0030] For example, when the magnetic lock buckle 4 is in the attracted state, the status indicator light 5 is green; when the magnetic lock buckle 4 is in the released state, the status indicator light 5 is red; when the magnetic lock buckle 4 is in the fault state, the status indicator light 5 is yellow (alarm color).

[0031] In order to ensure that the magnetic lock buckle 4 can operate normally and is not affected by the circuit of the grinding wheel saw, a power supply line can be laid in the remote cabinet on site to be used as the power supply for the magnetic lock buckle 4, that is, the magnetic lock buckle 4 is powered by an independent power supply module.

[0032] Directions: When the protective cover needs to be opened, first put the magnetic switch in the off state, the trigger status indicator light 5 turns red, and after the magnetic lock buckle 4 is released, the door panel 2 is opened through the mechanical lock buckle 3; before starting the grinding wheel saw, first close the door panel 2 through the mechanical lock buckle 3, and then turn the magnetic switch to the closed state. At this time, the trigger status indicator light 5 turns green, and after the magnetic lock buckle 4 is attracted, turn the start switch to the closed state to start the main motor of the grinding wheel saw. Example 2

[0033] On the basis of the first embodiment, the present invention further proposes a protective device for a grinding wheel saw, which adopts the double interlock switch system for the grinding wheel saw proposed in the first embodiment.

[0034] like Figure 4As shown, a protective device for a grinding wheel saw includes a frame 1, a door panel 2 that can be opened and closed relative to the frame 1 is installed on one side of the frame 1, the grinding wheel saw is installed inside the frame 1, and the frame 1 and the door panel 2 form a protective cover for the grinding wheel saw; a mechanical lock 3 and a magnetic lock 4 are installed on the frame 1 and the door panel 2, and the operating table is not only provided with a start switch for controlling the opening and closing of the main motor, but also with an additional magnetic switch for controlling the attraction and release of the magnetic lock 4.

[0035] In the existing grinding wheel saw protection device, two mechanical locks 3 are usually provided. It often happens that the operator only closes one mechanical lock 3, which easily causes the door panel 2 to open due to large vibration during the sawing process.

[0036] The protection device proposed in the present invention is mainly to prevent the operator from forgetting to close the mechanical lock 3 or only closing one mechanical lock 3 during operation, and to prevent the saw from shaking violently during sawing, causing the door panel 2 to open accidentally and causing damage to the mechanical lock 3; at the same time, to ensure the safety of the operator. When the operator replaces the saw blade, the operator controls the switch of the magnetic lock 4, which is interlocked with the program, and the safety of the equipment is improved.

[0037] Compared with the mechanical lock 3, the magnetic lock 4 is more stable and will not be affected by the wear of the mechanical lock 3. After a period of use, the mechanical handle will wear out more and the door panel 2 will shake more. The present invention proposes that the protective device is attracted by magnets. As long as the voltage is stable enough, the door panel 2 will always remain tightly closed.

[0038] Furthermore, the magnetic lock catch 4 of the present invention is located between the two mechanical lock catches 3, which enhances the stability and safety of the door panel 2. It also forms a double interlock with the switch detection signal of the door panel 2 to ensure that if one fails, the others will not be affected.

[0039] Specifically, a magnetic lock buckle 4 (providing 280kg of suction force) is installed on the door panel 2, and a 24V power supply is provided to the magnetic lock buckle 4 through the on-site operation cabinet; the magnetic lock buckle 4 is installed on the door panel 2, and when the line is arranged, a fireproof sleeve or iron pipe is used for protection, and the magnetic lock buckle 4 is installed between the two mechanical lock buckles 3.

[0040] When the magnetic lock 4 fails, the status indicator 5 on the shield changes color, allowing the operator to monitor the magnetic state of the door panel 2 in real time. The mechanical lock 3 also provides some protection. When replacing the saw blade, the operator must turn the switch of the magnetic lock 4 to the off position, and the indicator light turns red. Otherwise, the magnetic lock 4 will remain closed, and the door panel 2 cannot be opened.

[0041] In summary, the present invention proposes a double interlock switch system for a grinding wheel saw and its application, which prevents the operator from opening the door panel 2 when the saw blade has not completely stopped, thereby avoiding safety hazards. When starting, the magnetic switch must also be turned to the closed state to start the main motor of the grinding wheel saw, and the status indicator light 5 turns green. This can ensure that the main body of the device will not be damaged if the mechanical lock 3 is forgotten to be closed, and there will be no major risk if the saw blade explodes, ensuring that the door panel 2 is always in a normally closed state when the grinding wheel saw is working.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0044] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the content of the specification and must be determined according to the scope of the claims.

Claims

1. A double interlock switch system for a grinding wheel saw, characterized in that: include: A mechanical lock and a magnetic lock, both of which are installed on the door panel and frame of the grinding wheel saw, and are used to open or close the door panel; A magnetic switch connected to the magnetic lock, for controlling the opening and closing of the magnetic lock; a control module connected to the magnetic lock buckle and the magnetic switch, configured to detect a switch signal of the magnetic switch and a magnetic attraction signal of the magnetic lock buckle, and then determine a working state of the magnetic lock buckle according to the switch signal and the magnetic attraction signal; A status indicator light, connected to the control module and displaying a corresponding color according to the working status of the magnetic lock; The starting switch is connected to the magnetic switch and the main motor of the grinding wheel saw, and is used to control the start and stop of the main motor. When the magnetic switch and the starting switch are both in a closed state and the magnetic signal is in an attracted state, the main motor starts.

2. The double interlock switch system for a grinding wheel saw according to claim 1, characterized in that: The working states of the magnetic lock include closed, released and faulty; When the magnetic attraction signal is in the attracted state and the switch signal is in the closed state, the magnetic lock buckle is in the attracted state; When the magnetic attraction signal is in a released state and the switch signal is in an off state, the magnetic lock is in a released state; When the magnetic attraction signal is in the attracted state and the switch signal is in the disconnected state, or when the magnetic attraction signal is in the released state and the switch signal is in the closed state, the magnetic lock is in a fault state.

3. The double interlock switch system for a grinding wheel saw according to claim 2, characterized in that: When the magnetic lock is in the engaged state, the status indicator light is green; when the magnetic lock is in the released state, the status indicator light is red; when the magnetic lock is in the fault state, the status indicator light is yellow.

4. The double interlock switch system for a grinding wheel saw according to claim 3, characterized in that: The magnetic switch adopts a knob switch, and the magnetic lock is powered by an independent power module.

5. The double interlock switch system for a grinding wheel saw according to claim 4, characterized in that: When opening the door panel, first put the magnetic switch into the off state, trigger the status indicator light to turn red, release the magnetic lock, and then open the door panel through the mechanical lock.

6. The double interlock switch system for a grinding wheel saw according to claim 5, characterized in that: After closing the door panel with the mechanical lock, turn the magnetic switch to the closed state, the trigger status indicator light turns green, and after the magnetic lock is attracted, turn the start switch to the closed state to start the main motor of the grinding wheel saw.

7. A protective device for a grinding wheel saw, using the double interlock switch system for a grinding wheel saw according to any one of claims 1 to 6, characterized in that: The utility model comprises a frame for installing a grinding wheel saw, a door panel is provided on one side of the frame, a status indicator light is installed on the top of the frame, and a mechanical lock and a magnetic lock are installed on the frame and the door panel.

8. The double interlock switch system for a grinding wheel saw according to claim 7, characterized in that: There are two mechanical lock buckles, and the magnetic lock buckle is located between the two mechanical lock buckles.

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