A dewatering machine with safety interlock protection structure
By introducing a mechanical linkage design of rotary limit switch, cylinder and counterweight into the dewatering machine, it is ensured that the dewatering machine cannot be started when the lid is not closed, which solves the starting risk caused by misoperation, realizes the safety and stability of the equipment, and is suitable for high-speed dewatering conditions.
Patent Information
- Application Number
- CN202522019890.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-19
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-09-19
AI Technical Summary
Industrial dewatering machines pose a risk of entanglement, pulling, or trapping due to their simple operation, leading to frequent mechanical injury accidents.
A safety interlock protection device with linkage is adopted, which mechanically links to force the power off, ensuring that the dehydrator cannot start if the lid is not closed in place. The device includes a rotary limit switch, cylinder, lever and counterweight design, combined with the electrical connection of the main switch, cylinder control switch and contactor in the electrical control box, to achieve mechanical linkage to force the power off.
It effectively prevents the dehydrator from starting due to misoperation, eliminates the risk of starting with the lid open, ensures safe operation of the equipment, has a stable structure suitable for high-speed dehydration, and its maintenance-free design avoids metal fatigue failure through gravity reset of the counterweight.
Smart Images
Figure CN224930793U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of textile equipment technology, specifically relating to a dewatering machine with a safety interlock protection structure. Background Technology
[0002] In the dyeing and finishing process, dewatering machines are often used to dehydrate dyed wet fabrics to improve production efficiency, ensure product quality, reduce costs, and facilitate subsequent processing, before the fabric is sorted and shaped. However, industrial dewatering machines, due to their simple operation—just press a start switch—pose risks such as entanglement, pulling, or trapping due to their powerful centrifugal force. Mechanical injury accidents involving dewatering machines have occurred repeatedly in the textile dyeing and finishing industry. Utility Model Content
[0003] In view of the deficiencies in the existing technology, this utility model provides a dehydrator with a safety interlock protection structure, which is designed to prevent it from starting operation if the lid is not closed properly, thereby ensuring its safe operation.
[0004] The objective of this utility model can be achieved through the following technical solution: A dehydrator with a safety interlock protection structure, characterized in that the dehydrator includes a machine body and a top cover; a hinge seat is fixed on the outer wall of the machine body, a pressure rod is hinged on the hinge seat, and the top cover is fixed to the end of the pressure rod; a cylinder that can drive the pressure rod to rotate is also hinged on the outer wall of the machine body; a rotary limit switch is fixedly installed on the outer wall of the machine body below the hinge seat, a clamp is fixed on the rotating rod of the rotary limit switch, and a lever is fixedly installed on the clamp; one end of the lever is always located below the pressure rod, and a counterweight is fixed to the other end of the lever; the dehydrator also includes an electrical control box, which contains a main switch, a cylinder control switch, a contactor, and a motor control switch; the input terminal of the main switch is electrically connected to the power supply, and the output terminal is electrically connected to the cylinder control switch and the contactor respectively; the control terminal of the contactor is electrically connected to the rotary limit switch, and the output terminal is connected to the motor control switch.
[0005] Preferably, the trigger angle of the rotary limit switch is 30 to 45 degrees.
[0006] The advantages of this utility model are:
[0007] 1. Intrinsically safe: Power is forcibly cut off through mechanical linkage, eliminating the risk of starting the device when the cover is opened;
[0008] 2. Anti-misoperation: Even if the motor control switch (K3) is closed improperly, the contactor (KM) will remain de-energized;
[0009] 3. Maintenance-free design: The counterweight's gravity-based reset mechanism replaces the traditional spring, avoiding metal fatigue failure;
[0010] 4. Sturdy structure: The rotary limit switch has strong vibration resistance and is suitable for high-speed dehydration. Attached Figure Description
[0011] Figure 1 This is a three-dimensional structural diagram of the dehydrator.
[0012] Figure 2 This is a three-dimensional structural diagram of the dehydrator from another perspective.
[0013] Figure 3 This is a magnified view of a portion of the dehydrator.
[0014] Figure 4 This is the electrical control schematic diagram of this dehydrator.
[0015] In the diagram, 1 is the machine body; 11 is the hinge seat; 2 is the top cover; 21 is the pressure rod; 3 is the cylinder; 4 is the rotary limit switch; 41 is the chuck; 42 is the lever; 43 is the counterweight; 5 is the electrical control box; K1 is the main switch; K2 is the cylinder control switch; and K3 is the motor control switch. Detailed Implementation
[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0017] like Figure 1 , Figure 2 and Figure 3 As shown, a dehydrator with a safety interlock protection structure includes a body 1 and a top cover 2; a hinge seat 11 is fixed on the outer wall of the body 1, and a pressure rod 21 is hinged to the hinge seat 11, with the top cover 2 fixed to the end of the pressure rod 21; a cylinder 3 that can drive the pressure rod 21 to rotate is also hinged to the outer wall of the body 1; a rotary limit switch 4 is fixedly installed on the outer wall of the body 1 below the hinge seat 11, and a clamp 41 is fixed on the rotating rod of the rotary limit switch 4, with a lever 42 fixedly installed on the clamp 41; one end of the lever 42 is always located below the pressure rod 21, and a counterweight 43 is fixed to the other end of the lever 42; the dehydrator also includes an electrical control box 5, which contains a main switch K1, a cylinder control switch K2, a contactor, and a motor control switch K3.
[0018] like Figure 4 As shown, the input terminal of the main switch K1 is electrically connected to the power supply, and the output terminal is electrically connected to the cylinder control switch K2 and the contactor respectively; the control terminal of the contactor is electrically connected to the rotary limit switch 4, and the output terminal is connected to the motor control switch K3. The trigger angle of the rotary limit switch 4 is 30 to 45 degrees.
[0019] Safety interlock principle:
[0020] 1. Safe start with lid closed:
[0021] Cylinder 3 drives lever 21 to press down → lever 21 presses lever 42 → lever 42 drives rotary limit switch 4 to rotate to the closed position → contactor coil is energized → main contacts close → motor circuit is connected (at this time, operating motor control switch K3 can start and stop the motor).
[0022] 2. Forced power off when the lid is opened:
[0023] Top cover 2 opens → Pressure rod 21 moves up to release pressure on lever 42 → Counterweight 43 drives lever 42 to rotate in the opposite direction → Rotary limit switch 4 returns to the open position → Contactor coil is de-energized → Main contacts open → Motor power supply circuit is forcibly cut off (even if motor control switch K3 is closed, the motor cannot start).
[0024] Structural implementation
[0025] 1. The mass of the counterweight 43 is such that when the pressure rod 21 moves upward, its gravitational torque can cause the lever 42 to automatically rotate to the reset position and disconnect position.
[0026] 2. The rotary limit switch 4 is selected from the XCMD2 series waterproof type (can be triggered when the rotation angle is ≥30°).
[0027] 3. The contactor should be normally open, and the coil voltage should be the same as the output voltage of the main switch (K1).
[0028] Operating procedures
[0029] 1. When the main switch K1 is closed, the cylinder control switch K2 is energized;
[0030] 2. The operating cylinder 3 pushes the pressure rod 21 to close the top cover 2 → the rotary limit switch 4 closes;
[0031] 3. When the contactor coil is energized, the main contacts close, and the motor control switch K3 can start and stop the motor.
[0032] 4. When opening the cover: Cylinder 3 retracts → Pressure rod 21 moves up → Counterweight 43 pulls lever 42 to reset → Rotary limit switch 4 disconnects → Contactor is de-energized → Motor is forced to lose power.
[0033] This dehydrator, through its interlocking protection structure, effectively avoids dangers caused by operator error, making it safer to use.
[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
Claims
1. A dehydrator with a safety interlock protection structure, characterized in that, This dehydrator includes a body (1) and a top cover (2); a hinge seat (11) is fixed on the outer wall of the body (1), a pressure rod (21) is hinged on the hinge seat (11), and the top cover (2) is fixed to the end of the pressure rod (21); a cylinder (3) that can drive the pressure rod (21) to flip is also hinged on the outer wall of the body (1); a rotary limit switch (4) is fixedly installed on the outer wall of the body (1) below the hinge seat (11), a chuck (41) is fixed on the rotating rod of the rotary limit switch (4), and a lever (42) is fixedly installed on the chuck (41); One end of the lever (42) is always located below the pressure rod (21), and the other end of the lever (42) is fixed with a counterweight (43). This dehydrator also includes an electrical control box (5), which is equipped with a main switch (K1), a cylinder control switch (K2), a contactor, and a motor control switch (K3). The input end of the main switch (K1) is electrically connected to the power supply, and the output end is electrically connected to the cylinder control switch (K2) and the contactor, respectively. The control end of the contactor is electrically connected to the rotary limit switch (4), and the output end is connected to the motor control switch (K3).
2. A dehydrator with a safety interlock protection structure according to claim 1, characterized in that, The trigger angle of the rotary limit switch (4) is 30 to 45 degrees.