Interlocking safety protection system for centrifuge and protective door

Abstract

A linkage interlocking safety protection system for a centrifuge and a protective door, comprising an audible and visual alarm device, a mounting frame, a fixing bolt, a base, a wire hole, a mounting plate, an adjusting screw, a limit plate, an adjusting handle, a door-touch switch, a control box, a power distribution cabinet, a frequency converter, and a centrifuge motor. A mounting frame is provided on the upper side of the protective door, a base is vertically provided on the top of the mounting frame, the audible and visual alarm device is installed on the base, a mounting plate is provided on the upper side of the audible and visual alarm device, an adjusting hole with an inner thread on the inner wall is provided on the mounting plate, an adjusting screw is provided in the adjusting hole, a door-touch switch is provided on the door frame of the protective door, the door-touch switch is electrically connected to the audible and visual alarm device through a cable via the control box, the control box is electrically connected to the power distribution cabinet through a cable, and the power distribution cabinet is electrically connected to the centrifuge motor through a cable via the frequency converter. The invention has the advantages that the power distribution cabinet of the centrifuge and the protective door are linked and interlocked through a circuit, thereby ensuring the safety of personnel who mistakenly enter the centrifuge when it is working.

Description

Technical Field

[0001] The invention relates to a protection system, in particular to a linkage interlocking safety protection system for a centrifuge and a protection door. Background Art

[0002] A centrifuge is a machine that uses centrifugal force to separate components in a liquid and solid particle or a liquid-liquid mixture. It can also be used to determine whether the structural adaptability and performance of electronic components, small equipment and other electrical and electronic products are good under the forces (excluding gravity) generated by a steady-state acceleration (constant acceleration) environment, such as those generated by running vehicles, aerial vehicles, rotating machinery and projectiles, and to assess the structural integrity of some components.

[0003] During the working process, the arm with the test product rotates at high speed, and the safety issue is extremely important, so reasonable and reliable safety protection is required. When installing the equipment, there are generally two safety protection installation methods. One is to install the centrifuge in a concrete pit, and the other is to install the centrifuge in a concrete safety wall. When the second installation method is used, it is usually installed in a spiral concrete safety wall with a control system outside the safety wall. A surveillance camera is installed on the upper part of the safety wall. The monitoring computer is close to the control system so that the test operator can observe the centrifuge and its surrounding status in real time. An iron protective door is installed at the entrance to the safety wall, and the test personnel are required to close the protective door before starting the test to prevent personnel from entering the test accidentally and causing personal injury during the test. At the same time, the safety operating procedures for the centrifuge system in the laboratory operation documents stipulate that: after the start-up preparation work is completed, all staff are required to leave the test room, and there must be no foreign objects in the test room that hinder the rotation of the arm; during the test, if the centrifuge has abnormal sounds and faults, the emergency stop switch should be pressed immediately and the power supply should be cut off. Before the centrifuge is completely stopped, it is not allowed to go to watch. After the centrifuge is completely stopped, it can be checked.

[0004] Although many precautionary measures have been taken in terms of safety protection, there are still safety hazards in the actual test process, such as: 1. Because the test operator forgets to close the protective door at the entrance of the protective wall and starts the test, other people mistakenly think that the equipment is not being tested and enter the safety hazard; 2. The test operator closes the protective door at the entrance of the protective wall as required and starts the test, and other people (customers) who are not familiar with the hazards of centrifuge operation enter the safety hazard. In view of this, in order to completely eliminate the safety hazards, it is urgent to design a linkage interlocking safety protection system for centrifuges and protective doors. Summary of the invention

[0005] According to the above technical problems, the present invention provides a linkage interlocking safety protection system for a centrifuge and a protective door, including a protective door, an audible and visual alarm device, a mounting frame, a fixing bolt, a base, a wire hole, a mounting plate, an adjusting screw, a limit plate, an adjusting handle, a door touch switch, a control box, a power distribution cabinet, a frequency converter, and a centrifuge motor. A mounting frame is provided on the upper side of the protective door, and the mounting frame is fixedly connected to the wall by fixing bolts. A base is vertically provided on the top of the mounting frame, and a wire hole is provided on the base. The audible and visual alarm device is installed on the base, and the upper side of the audible and visual alarm device A mounting plate is provided, one end of which is fixedly connected to the wall, an adjusting hole with an inner thread on the inner wall is provided on the mounting plate, an adjusting screw is provided in the adjusting hole, an outer wall of the adjusting screw is provided with an outer thread corresponding to the inner wall of the adjusting hole, a limit plate is provided at the bottom of the adjusting screw, an adjusting handle is provided at the top of the adjusting screw, a door touch switch is provided on the door frame of the protective door, the door touch switch is electrically connected to the sound and light alarm device through a cable via a control box, the control box is electrically connected to the power distribution cabinet through a cable, and the power distribution cabinet is electrically connected to the centrifuge motor through a cable via a frequency converter.

[0006] Furthermore, the sound and light alarm device integrates three status lights of yellow, green and red and a peak alarm.

[0007] Furthermore, the mounting plate is located 5 cm-10 cm from the top of the sound and light alarm device.

[0008] Furthermore, the length of the adjusting screw is greater than 10 cm.

[0009] Furthermore, the limiting plate is made of hard rubber.

[0010] Furthermore, a contactor is also provided in the power distribution cabinet.

[0011] Furthermore, the control box is also provided with a switch and a relay.

[0012] The beneficial effects of the present invention are as follows: the present invention is a linkage interlocking safety protection system for a centrifuge and a protective door, by installing an acousto-optic alarm device integrating yellow, green and red status lights and a peak alarm in a conspicuous position of the centrifuge protective door, wherein the wire hole on the base is convenient for combing the connecting cables between the door touch switch, and the adjusting screw on the top is convenient for limiting the acousto-optic alarm device, so that the acousto-optic alarm device is easy to install, and at the same time, a touch switch is installed on the door frame, and these two devices are connected to the control circuit in the power distribution cabinet of the centrifuge to realize that the working state of the centrifuge can be displayed on the acousto-optic alarm device, thereby avoiding the safety hazard that other personnel mistakenly think that the equipment is not being tested and enter by mistake because the test operator forgets to close the protective door at the entrance of the protective wall and starts the test, and the safety hazard that other personnel (customers) who are not familiar with the harmfulness of the centrifuge enter when the test operator closes the protective door at the entrance of the protective wall as required. The present invention realizes linkage interlocking between the power distribution cabinet of the centrifuge and the protective door through the circuit, thereby ensuring the safety of personnel who enter by mistake when the centrifuge is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the installation structure of the present invention;

[0014] Figure 2 This is an enlarged schematic diagram of point A;

[0015] Figure 3 It is a flow chart of the present invention;

[0016] Figure 4 This is a circuit diagram of the present invention.

[0017] As shown in the figure, protective door-1, wall-2, sound and light alarm device-3, mounting frame-4, fixing bolt-5, base-6, wire hole-7, mounting plate-8, adjustment screw-9, limit plate-10, adjustment handle-11, door touch switch-12, control box-13, power distribution cabinet-14, inverter-15, centrifuge motor-16;

[0018] KA1, KA2, KA3 are all relays, and KM is a contactor. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings: The present invention is a linkage interlocking safety protection system for a centrifuge and a protective door, comprising a protective door 1, an audible and visual alarm device 3, a mounting frame 4, a fixing bolt 5, a base 6, a wire hole 7, a mounting plate 8, an adjusting screw 9, a limit plate 10, an adjusting handle 11, a door touch switch 12, a control box 13, a power distribution cabinet 14, a frequency converter 15, and a centrifuge motor 16. A mounting frame 4 is provided on the upper side of the protective door 1, and the mounting frame 4 is fixedly connected to the wall 2 by fixing bolts 5. A base 6 is vertically provided on the top of the mounting frame 4, and a wire hole 7 is provided on the base 6. The audible and visual alarm device 3 is installed on the base 6, and the audible and visual alarm device 3 is installed on the base 6. A mounting plate 8 is provided on the upper side of the alarm device 3, one end of the mounting plate 8 is fixedly connected to the wall 2, an adjustment hole with an inner wall having an internal thread is provided on the mounting plate 8, an adjusting screw 9 is provided in the adjusting hole, an outer wall of the adjusting screw 9 is provided with an external thread corresponding to the inner wall of the adjusting hole, a limit plate 10 is provided at the bottom of the adjusting screw 9, an adjusting handle 11 is provided at the top of the adjusting screw 9, a door touch switch 12 is provided on the door frame of the protective door 1, the door touch switch 12 is electrically connected to the sound and light alarm device 3 through a cable via a control box 13, the control box 13 is electrically connected to a power distribution cabinet 14 through a cable, and the power distribution cabinet 14 is electrically connected to a centrifuge motor 16 through a cable via a frequency converter 15.

[0020] Furthermore, the sound and light alarm device 3 integrates three status lights of yellow, green and red and a peak alarm to indicate different states of the centrifuge respectively.

[0021] Furthermore, the installation plate 8 is located 5 cm-10 cm from the top of the sound and light alarm device 3 , which facilitates the installation of the sound and light alarm device 3 .

[0022] Furthermore, the length of the adjusting screw 9 is greater than 10 cm, ensuring that it can effectively limit the sound and light alarm device 3 .

[0023] Furthermore, the material of the limiting plate 10 is hard rubber to prevent damage to the sound and light alarm device 3.

[0024] Furthermore, a contactor is also provided in the power distribution cabinet 14 .

[0025] Furthermore, the control box 13 is also provided with a switch and a relay.

[0026] Working principle: Place the bottom of the sound and light alarm device 3 in the base 6, extend the cable from the wire hole 7, and rotate the adjusting screw 9 by adjusting the handle 11 until the limit plate 10 contacts the top of the sound and light alarm device 3, so as to fix the sound and light alarm device 3. Install the door touch switch 12 on the door frame of the protective door 1. After the installation is completed, first confirm that the circuit connection between the sound and light alarm device 3 and the door touch switch 12 and the distribution cabinet 14, control box 13, inverter 15, centrifuge motor 16 is correct. Test when the connection is correct, and finally achieve the following effect:

[0027] 1. When the protective door 1 is open or closed, the power distribution cabinet 14 is powered on, and the inverter 15 is not powered, the KA1 relay of the equipment is energized, and the yellow standby indicator light of the sound and light alarm device 3 is on;

[0028] 2. When the protective door 1 is closed, the power distribution cabinet 14 is powered on, and the frequency converter 15 supplies power, the equipment is running, the KA2 relay is energized, and the green operating status indicator of the sound and light alarm device 3 is on. In this state, set the test parameters on the control software of the centrifuge's power distribution cabinet 14 according to the test conditions and click "Run" before the centrifuge can run. Note: When the protective door 1 is not closed, the power distribution cabinet 14 and the frequency converter 15 are powered on first, and then the green indicator of the sound and light alarm device 3 is on, but the centrifuge will not work after the control software sets the test parameters and clicks "Run";

[0029] 3. When the protective door 1 is closed, the power distribution cabinet 14 is powered on, the frequency converter 15 is powered on, and the control software sets the test parameters and clicks on Run. When the centrifuge is in operation, if someone opens the protective door 1, the door touch switch 12 on the door frame will be activated, and its signal will disconnect the KM contactor that controls the centrifuge motor 16, and the KA3 relay will be energized. At the same time, the red alarm status indicator light of the sound and light alarm device 3 will light up and the buzzer alarm will be prompted.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A linkage interlocking safety protection system for a centrifuge and a protective door, characterized in that: It includes a protective door, an audible and visual alarm device, a mounting frame, fixing bolts, a base, a wire hole, a mounting plate, an adjusting screw, a limit plate, an adjusting handle, a door touch switch, a control box, a power distribution cabinet, a frequency converter, and a centrifuge motor. The protective door is provided with a mounting frame on the upper side, the mounting frame is fixedly connected to the wall by fixing bolts, a base is vertically provided on the top of the mounting frame, a wire hole is provided on the base, the audible and visual alarm device is installed on the base, a mounting plate is provided on the upper side of the audible and visual alarm device, one end of the mounting plate is fixedly connected to the wall, an adjusting hole with an inner wall having an internal thread is provided on the mounting plate, an adjusting screw is provided in the adjusting hole, the outer wall of the adjusting screw is provided with an external thread corresponding to the inner wall of the adjusting hole, a limit plate is provided at the bottom of the adjusting screw, an adjusting handle is provided on the top of the adjusting screw, and the protective door is provided with a mounting plate on the upper side of the audible and visual alarm device. A door-touch switch is provided, which is electrically connected to the sound and light alarm device through a control box through a cable, the control box is electrically connected to the power distribution cabinet through a cable, and the power distribution cabinet is electrically connected to the centrifuge motor through a cable through a frequency converter; a switch and a relay are also provided in the control box; a contactor is also provided in the power distribution cabinet, and the sound and light alarm device integrates yellow, green and red status lights and a peak alarm. When the protective door is closed, the power distribution cabinet is powered on, the frequency converter is powered on, and the control software sets the test parameters and clicks to run. When the centrifuge is in operation, if someone opens the protective door, the door-touch switch on the door frame will be activated, and its signal will disconnect the contactor that controls the action of the centrifuge motor, and the relay will be closed. When the centrifuge stops working, the red alarm status indicator light of the sound and light alarm device will light up and the buzzer alarm will be prompted.

2. A linkage interlocking safety protection system for a centrifuge and a protective door according to claim 1, characterized in that: The mounting plate is located 5 cm to 10 cm from the top of the sound and light alarm device.

3. A linkage interlocking safety protection system for a centrifuge and a protective door according to claim 1, characterized in that: The length of the adjusting screw is greater than 10 cm.

4. A linkage interlocking safety protection system for a centrifuge and a protective door according to claim 1, characterized in that: The material of the limiting plate is hard rubber.

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