Leakage detection device for liquid collecting tank of biological safety cabinet

Abstract

The utility model belongs to the technical field of leakage detection, and particularly relates to a biological safety cabinet liquid collecting tank leakage detection device which comprises a safety cabinet bottom plate, the safety cabinet bottom plate is provided with a liquid collecting bin and a telescopic plate, the liquid collecting bin is provided with a liquid drainage hole, a sealing ring, a sensor and a mounting seat, and the bottom of the liquid collecting bin is provided with a groove. A control system is arranged on the side edge of the sensor, a movable plate, a leakage-proof sleeve and a piston are movably arranged below the liquid drainage hole, a motor is arranged below the control system, a lead screw is arranged at the output end of the motor, a limiting plate is arranged at the tail end of the lead screw, and a fixing button is arranged on the telescopic plate. According to the utility model, another interface is added on the original control system for transmitting electric signals, so that the control system can transmit signals to the alarm system and the motor at the same time, and the motor can start the driving screw rod to rotate to drive the moving plate and the leakage-proof sleeve to ascend, so that the leakage-proof sleeve and the piston block the liquid discharge hole; and the situation that liquid drops before workers take measures manually is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of leakage detection, in particular to a leakage detection device for a liquid collecting tank of a biological safety cabinet. Background Art

[0002] A biological safety cabinet is a box-type air purification negative pressure safety device. Its main purpose is to prevent the escape of aerosols containing dangerous or unknown biological particles during experimental operations. Biological safety cabinets are widely used in scientific research, teaching, clinical testing and production in the fields of microbiology, biomedicine, genetic engineering, and biological products. It is the most basic safety protection equipment in the first-level protection barrier of laboratory biosafety.

[0003] During the use of the biological safety cabinet, some harmful liquids will be produced. At this time, a liquid collection tank is needed to collect the liquid to prevent the liquid from directly flowing out of the body and causing harm to the human body and the environment. However, as the use time increases, the sealing of the connection between the drainage hole of the drainage tank and the valve will decrease, resulting in liquid leakage. At this time, the leakage detection device will trigger an alarm to remind the staff to take corresponding measures, but there will be a certain amount of time between the staff hearing the alarm and taking measures, resulting in the leakage position of the drainage hole cannot be blocked in the first time, and a small amount of harmful liquid will still drip, causing harm to the human body and the environment.

[0004] In order to solve the above problems, the present application proposes a biosafety cabinet sump leakage detection device. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a biological safety cabinet liquid collection tank leakage detection device, including a safety cabinet bottom plate, a liquid collection bin and a telescopic plate are fixedly provided at the bottom of the safety cabinet bottom plate, a drainage hole, a sealing ring, a sensor and a mounting seat are fixedly provided on the liquid collection bin, a groove is opened at the bottom of the liquid collection bin, a control system is provided on the side of the sensor, a movable plate, a leak-proof sleeve and a piston are movably provided below the drainage hole, a motor is fixedly provided below the control system, a screw rod is fixedly provided at the output end of the motor, a limit plate is fixedly provided at the end of the screw rod, and a fixing button is fixedly provided on the telescopic plate.

[0006] Preferably, the sealing ring is fixedly connected in the groove, the ring width of the sealing ring is equal to the ring width of the groove, the ring width of the leak-proof sleeve is equal to the ring width of the groove, and the diameter of the piston is equal to the inner cavity diameter of the drainage hole.

[0007] Preferably, the sensor is fixedly mounted on the side of the liquid collecting bin, and the sensor is connected to the control system via a wire.

[0008] Preferably, the control system is provided with two connection ports, and wires are provided in the two connection ports. The upper wire of the control system is fixedly connected to the alarm system, and the lower wire of the control system is fixedly connected to the motor.

[0009] Preferably, the mounting seat is fixedly connected to the side of the liquid collecting bin, the motor is fixedly mounted on the mounting seat, and the screw rod is rotatably connected to the mounting seat.

[0010] Preferably, the movable plate is spirally connected to the screw rod, and the movable plate is located above the limiting plate.

[0011] Preferably, the fixed end of the telescopic plate is fixedly installed on the bottom of the bottom plate of the safety cabinet, the side of the telescopic end of the telescopic plate is tightly fitted with the side of the movable plate, the movable plate is slidably connected in the middle of the telescopic ends of the two telescopic plates, a spring is fixedly provided at the bottom of the fixing button, the other end of the spring is fixedly connected to the telescopic end of the telescopic plate, a positioning hole is opened at the fixed end of the telescopic plate, and the fixing button is movably connected in the positioning hole.

[0012] The above technical solution of the utility model has the following beneficial technical effects:

[0013] The utility model adds another interface for transmitting electrical signals to the original detection device control system, so that the control system can transmit signals to the original alarm system and the added motor at the same time, so that when the device sounds an alarm, the motor can start to drive the screw rod to rotate, drive the moving plate and the leak-proof sleeve to rise, and allow the leak-proof sleeve and the piston to block the drainage hole, thereby preventing liquid leakage in the first place and avoiding the situation where liquid drips before the staff manually takes measures, thereby reducing the harm to the staff and the environment and preventing the leakage from expanding.

[0014] At the same time, the utility model arranges the fixed plates on both sides of the movable plate as retractable retractable plates. Without affecting the lifting and lowering of the movable plate, the retractable plates can be retracted when the staff discharges the liquid in the liquid collecting bin, so that the movable plate and the anti-leakage sleeve can be rotated to a place away from the drainage hole to avoid obstruction to the discharge of the liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the front view structure of the utility model;

[0017] Figure 3 It is a side structural schematic diagram of the utility model.

[0018] Reference numerals:

[0019] 1. Safety cabinet bottom plate; 2. Liquid collecting bin; 201. Drain hole; 202. Groove; 203. Sealing ring; 3. Sensor; 4. Control system; 5. Motor; 501. Screw rod; 502. Limit plate; 6. Mounting seat; 7. Moving plate; 8. Leak-proof sleeve; 801. Piston; 9. Telescopic plate; 901. Fixing button. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0021] It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention.

[0022] A biosafety cabinet sump leakage detection device provided by some embodiments of the utility model will be described below in conjunction with the accompanying drawings.

[0023] Embodiment 1:

[0024] Combination Figure 1-3As shown, the utility model provides a biological safety cabinet liquid collection tank leakage detection device, including a safety cabinet bottom plate 1, the bottom of the safety cabinet bottom plate 1 is fixedly provided with a liquid collection bin 2 and a telescopic plate 9, the liquid collection bin 2 is fixedly provided with a drainage hole 201, a sealing ring 203, a sensor 3 and a mounting seat 6, a groove 202 is opened at the bottom of the liquid collection bin 2, a control system 4 is provided on the side of the sensor 3, a movable plate 7, a leak-proof sleeve 8 and a piston 801 are movably provided below the drainage hole 201, and the control system 4 A motor 5 is fixedly provided at the bottom, a screw rod 501 is fixedly provided at the output end of the motor 5, a stop plate 502 is fixedly provided at the end of the screw rod 501, a fixing button 901 is fixedly provided on the telescopic plate 9, the sealing ring 203 is fixedly connected in the groove 202, the ring width of the sealing ring 203 is equal to the ring width of the groove 202, the ring width of the leak-proof sleeve 8 is equal to the ring width of the groove 202, the diameter of the piston 801 is equal to the inner cavity diameter of the discharge hole 201, and the sensor 3 is fixedly installed in the liquid collecting bin 2 side, the sensor 3 and the control system 4 are connected by wires, the control system 4 is provided with two connection ports, and wires are arranged in the two connection ports. The wire above the control system 4 is fixedly connected to the alarm system, and the wire below the control system 4 is fixedly connected to the motor 5. The mounting seat 6 is fixedly connected to the side of the liquid collecting bin 2, and the motor 5 is fixedly mounted on the mounting seat 6. The screw rod 501 and the mounting seat 6 are rotatably connected, and the movable plate 7 is spirally connected to the screw rod 501. The movable plate 7 is located above the limit plate 502. The fixed end of the telescopic plate 9 is fixedly mounted on the bottom of the safety cabinet bottom plate 1, and the side of the telescopic end of the telescopic plate 9 is tightly fitted with the side of the movable plate 7. The movable plate 7 is slidably connected in the middle of the telescopic ends of the two telescopic plates 9. A spring is fixedly arranged at the bottom of the fixing button 901, and the other end of the spring is fixedly connected to the telescopic end of the telescopic plate 9. A positioning hole is opened at the fixed end of the telescopic plate 9, and the fixing button 901 is movably connected in the positioning hole.

[0025] Specifically, a liquid collecting bin 2 is fixedly welded at the bottom of the bottom plate 1 of the safety cabinet, so that the connection between the bottom plate 1 of the safety cabinet and the liquid collecting bin 2 is in a completely sealed state, a drainage hole 201 and a groove 202 are opened at the bottom of the liquid collecting bin 2, a sealing ring 203 is fixedly installed in the groove 202, and the ring width of the groove 202 is equal to the ring width of the sealing ring 203, and a movable plate 7, a leakproof sleeve 8 and a piston 801 are movably provided below the drainage hole 201, and the ring width of the leakproof sleeve 8 is equal to the ring width of the groove 202, so that the leakproof sleeve 8 can enter the groove 202 and fit closely with the sealing ring 203, so that the leakproof sleeve 8 The connection between the piston 801 and the liquid collecting bin 2 is sealed, and the diameter of the piston 801 is equal to the diameter of the drainage hole 201, so that the piston 801 can enter the drainage hole 201, thereby blocking the drainage hole 201 to prevent liquid leakage. A sensor 3 is fixedly installed on the side of the liquid collecting bin 2, so that the sensor 3 can sense the situation of the liquid in the liquid collecting bin 2, and thus transmit the signal to the control system 4 next to it through the wire. After processing the signal, the control system 4 will transmit the electrical signal to the upper and lower wires. The upper wire transmits the signal to the alarm system, so that the alarm system sounds an alarm to remind the staff of liquid leakage. The lower wire transmits the signal to the motor 5, thereby controlling the motor 5 to start and drive the screw rod 501 at the output end of the motor 5 to rotate. The screw rod 501 is spirally connected with a moving plate 7 so that the moving plate 7 can rotate with the screw rod 501. Two telescopic plates 9 are fixedly installed at the bottom of the safety cabinet bottom plate 1, and the moving plate 7 is slidably connected between the telescopic ends of the two telescopic plates 9 so that the telescopic plate 9 can block the movement of the moving plate 7, so that the moving plate 7 can be lifted and lowered between the telescopic ends of the telescopic plates 9. A limiting plate 502 is fixedly welded at the end of the screw rod 501 to prevent the moving plate 7 from falling off the screw rod 501. 1, a positioning hole is provided at the fixed end of the telescopic plate 9, and a spring and a fixing button 901 are fixed at the telescopic end of the telescopic plate 9, so that when the telescopic end of the telescopic plate 9 is stretched to a certain length, the fixing button 901 will be bounced from the positioning hole by the spring, so that the telescopic end of the telescopic plate 9 is fixed, thereby ensuring that the movable plate 7 can slide between the telescopic ends. When it is necessary to discharge the liquid in the liquid collecting bin 2, the movable plate 7 and the leak-proof sleeve 8 will hinder the discharge of the liquid. At this time, the fixing button 901 can be pressed and the telescopic end of the telescopic plate 9 can be retracted, and then the movable plate 7 can be rotated to make the leak-proof sleeve 8 away from the discharge hole 201.

[0026] The working principle and use process of the utility model are as follows: first, the liquid generated during the use of the biological safety cabinet will enter the liquid collecting bin 2 and be collected. When the use time is too long, the connection between the drain hole 201 and the valve will loosen and the sealing will decrease. At this time, the liquid in the liquid collecting bin 2 will leak. Then the sensor 3 senses the liquid change and transmits information to the control system 4. The control system 4 transmits signals to the alarm system and the motor 5 at the same time to control the alarm to be issued and control the motor 5 to start, drive the screw rod 501 to rotate, and make the movable plate 7 slide up and down between the telescopic ends of the two telescopic plates 9, driving the leak-proof sleeve 8 The piston 801 approaches the drainage hole 201, the leak-proof sleeve 8 enters the groove 202 and fits tightly with the sealing ring 203, and the piston 801 enters the drainage hole 201 to complete the blockage, thereby blocking the leakage at the first time, avoiding the liquid dripping before the staff takes measures, and reducing the harm to the human body and the environment; when the liquid in the liquid collecting bin 2 needs to be discharged, the fixing button 901 is pressed to retract the telescopic end of the telescopic plate 9, and then the leak-proof sleeve 8 is moved away from the drainage hole 201 by manually rotating the movable plate 7, and then the valve in the drainage hole 201 is opened to start discharging the liquid.

[0027] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A biological safety cabinet sump leakage detection device, comprising a safety cabinet bottom plate (1), characterized in that: A liquid collecting bin (2) and a telescopic plate (9) are fixedly provided at the bottom of the bottom plate (1) of the safety cabinet; a liquid discharge hole (201), a sealing ring (203), a sensor (3) and a mounting seat (6) are fixedly provided on the liquid collecting bin (2); a groove (202) is provided at the bottom of the liquid collecting bin (2); a control system (4) is provided on the side of the sensor (3); a movable plate (7), a leak-proof sleeve (8) and a piston (801) are movably provided below the liquid discharge hole (201); a motor (5) is fixedly provided below the control system (4); a screw rod (501) is fixedly provided at the output end of the motor (5); a limit plate (502) is fixedly provided at the end of the screw rod (501); and a fixing button (901) is fixedly provided on the telescopic plate (9).

2. A biological safety cabinet sump leakage detection device according to claim 1, characterized in that: The sealing ring (203) is fixedly connected in the groove (202), the ring width of the sealing ring (203) is equal to the ring width of the groove (202), the ring width of the leak-proof sleeve (8) is equal to the ring width of the groove (202), and the diameter of the piston (801) is equal to the inner cavity diameter of the drainage hole (201).

3. A biosafety cabinet sump leakage detection device according to claim 1, characterized in that: The sensor (3) is fixedly mounted on the side of the liquid collecting bin (2), and the sensor (3) and the control system (4) are connected via a wire.

4. A biosafety cabinet sump leakage detection device according to claim 1, characterized in that: The control system (4) is provided with two connection ports, and wires are provided in both connection ports. The upper wire of the control system (4) is fixedly connected to the alarm system, and the lower wire of the control system (4) is fixedly connected to the motor (5).

5. A biosafety cabinet sump leakage detection device according to claim 1, characterized in that: The mounting seat (6) is fixedly connected to the side of the liquid collecting bin (2), the motor (5) is fixedly mounted on the mounting seat (6), and the screw rod (501) is rotatably connected to the mounting seat (6).

6. A biosafety cabinet sump leakage detection device according to claim 1, characterized in that: The movable plate (7) is spirally connected to the screw rod (501), and the movable plate (7) is located above the limiting plate (502).

7. A biosafety cabinet sump leakage detection device according to claim 1, characterized in that: The fixed end of the telescopic plate (9) is fixedly mounted on the bottom of the safety cabinet bottom plate (1); the side of the telescopic end of the telescopic plate (9) is tightly fitted with the side of the movable plate (7); the movable plate (7) is slidably connected in the middle of the telescopic ends of the two telescopic plates (9); a spring is fixedly arranged at the bottom of the fixing button (901); the other end of the spring is fixedly connected to the telescopic end of the telescopic plate (9); a positioning hole is opened at the fixed end of the telescopic plate (9); and the fixing button (901) is movably connected in the positioning hole.

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